Patent Application
20250035117
The present disclosure relates to the field of pressure boosting technologies, and more particularly, to a pressure boosting device and a gas water heater.
With the development of economy, gas water heaters have been widely adopted by consumers due to their energy saving and convenience. However, in homes of residents on higher floors, the gas water heaters often fail to start or provide a poor user experience due to insufficient water pressure. Thus, there is a room for improvement.
The present disclosure aims to solve at least one of the technical problems in the related art. To this end, according to some embodiments of the present disclosure, there is provided a pressure boosting device, which can achieve a satisfactory pressure boosting effect.
According to some embodiments of the present disclosure, there is provided a pressure boosting device.
According to some embodiments of the present disclosure, there is provided a gas water heater.
A pressure boosting device according to embodiments of a first aspect of the present disclosure includes a housing, a plurality of impellers, and a driver. The housing has a water inlet and a water outlet. The plurality of impellers is located between the water inlet and the water outlet. The plurality of impellers is arranged at intervals along an axis direction of each impeller. The driver is disposed at the housing, and is configured to drive the plurality of impellers to rotate cooperating with the plurality of impellers to.
According to the pressure boosting device of the embodiments of the present disclosure, by arranging the plurality of impellers, a pressure boosting effect on water introduced into the housing can be achieved after the water flows through the plurality of impellers. By driving the plurality of impellers to rotate simultaneously by the driver, a number of parts of the pressure boosting device can be reduced. As a result, the pressure boosting device has a compact structure, and pressure boosting efficiency of the pressure boosting device can be improved to improve user experience.
According to some embodiments of the present disclosure, the pressure boosting device further includes a water guide component disposed between two adjacent impellers of the plurality of impellers. The water guide component is configured to guide water from an outlet of an upstream impeller of the plurality of impellers to an inlet of a downstream impeller of the plurality of impellers in a water flowing direction.
According to some embodiments of the present disclosure, the impeller has an axis perpendicular to a centerline of the water inlet.
In some examples, the centerline of the water inlet extends vertically, and the axis of the impeller extends horizontally.
According to some embodiments of the present disclosure, the water inlet is located below the water outlet, and a centerline of the water inlet is parallel to a centerline of the water outlet.
According to some embodiments of the present disclosure, the housing has a water inflow passage between the water inlet and the plurality of impellers. A flow cross-sectional area of at least a portion of the water inflow passage, in cross-section, gradually increases in a direction towards the plurality of impellers.
In some examples, the housing has a water outflow passage between the plurality of impellers and the water outlet. A flow cross-sectional area of at least a portion of the water outflow passage gradually increases in a direction towards the water outflowing opening.
According to some embodiments of the present disclosure, each of the plurality of impellers has an impeller inlet located at a central part of the impeller and an impeller outlet located at a periphery of the impeller.
In some examples, the water guide component has a water guide inlet and a water guide outlet. In a radial direction of the impeller, the water guide inlet is located outside the impeller outlet, and the water guide outlet is located inside the water guide inlet and corresponds to the impeller inlet.
According to some embodiments of the present disclosure, each of the plurality of impellers includes a blade, a first cover plate, and a second cover plate. The blade is disposed between the first cover plate and the second cover plate. The first cover plate has an opening at a central part of the first cover plate. The second cover plate has a connection part at a central part of the second cover plate, and the connection part cooperates with the driver.
In some examples, at least part of the connection part protrudes beyond a side of the second cover plate facing towards the first cover plate, and a part of the connection part extends into the opening. An impeller inlet is formed between the part of the connection part and an inner peripheral surface of the first cover plate.
In some examples, the connection part is formed into an annular shape, and has an engagement groove at an inner peripheral surface of the connection part. The engagement groove penetrates the connection part along the axis direction of the impeller.
In some examples, the driver has a drive shaft with a key. The key is inserted into and engaged with the engagement groove.
In some examples, the blade has a first protrusion protruding towards the second cover plate, and the second cover plate has a blade groove engaged with the blade. The blade groove has a first slot at a bottom wall of the blade groove. The blade is adapted to be inserted into the blade groove, and the first protrusion is adapted to be inserted into the first slot.
In some examples, the blade and the first cover plate are integrally formed.
In some examples, the second cover plate is an integrated formed.
In some examples, the blade includes first blades and second blades that are alternately arranged in a circumferential direction of the impeller. Each of the first blades has a length different from a length of each of the second blades.
In some examples, in a radial direction of the impeller, an outer end of the first blade extends to an outer peripheral edge of the first cover plate, and an inner end of the first blade extends to a position inside an inner peripheral edge of the first cover plate.
In some examples, two ends of the second blade are located between the outer circumferential edge and the inner peripheral edge of the first cover plate.
In some examples, the inner end of the first blade abuts against the connection part.
In some examples, in a radial direction of the impeller, outer ends of the first blades and outer ends of the second blades are arranged at equal intervals in the circumferential direction of the impeller.
In some examples, an inner end of one of the second blades is offset from a center between two of the first blades adjacent to the one second blade.
In some examples, the water guide component includes a water guide vane, a water guide hood, and a water guide base. The water guide hood has a water guide inlet. The water guide base has a water guide outlet. The water guide hood is disposed at a side of the water guide base adjacent to the upstream impeller of the plurality of impellers. The water guide vane is disposed between the water guide hood and the water guide base. The housing has a chamber. One of the water guide hood and the water guide base is fixedly connected to the housing, and an outer peripheral wall of another one of the water guide hood and the water guide base outer abuts against a wall surface of the chamber.
In some examples, the water guide vane is formed at the water guide hood, and has a second protrusion protruding towards the water guide base; and the water guide base has a water guide vane groove. The water guide vane is engaged into the water guide vane groove. The water guide vane groove has a second slot at a bottom wall of the water guide vane groove. The water guide vane is adapted to be inserted into the water guide vane groove, and the second protrusion is adapted to be inserted into the second slot.
In some examples, the water guide hood includes a water guide hood plate and a retaining ring. The water guide hood plate has an avoidance opening at a central part of the water guide hood plate. The retaining ring is disposed at a side of the water guide hood plate adjacent to the water guide base and abutting against the wall surface of the chamber. The water guide vane has an end connected to the retaining ring and another end extending to the central part of the water guide hood plate; and the water guide inlet is located between the water guide vane and the retaining ring.
In some examples, the water guide inlet has a dimension gradually increasing in a water guide direction of the water guide component.
According to some embodiments of the present disclosure, the housing includes a first hood and a second hood. The water inlet is formed at the first hood. The second hood forms a chamber opened at two sides. The second hood is sealingly engaged with the first hood at a side of the second hood. The driver is disposed at another side of the second hood and sealingly engaged with the second hood. The water outlet is formed at the second hood.
In some examples, the first hood includes a shield plate and a water inlet tube. The shield plate shields the side of the second hood. The shield plate has a water passing opening at the central part of the shield plate. The water passing opening is in communication with the chamber. The water inlet tube has an end as the water inlet and another end in communication with the water passing opening. The water inlet tube is of a bent shape.
In some examples, the pressure boosting device further includes a first seal ring. The first hood has a protrusion ring at a side of the first hood facing towards the second hood. The protrusion ring is extendable into the chamber. The second hood has a first avoidance groove at a side of the second hood adjacent to the first hood. The first avoidance groove is in communication with the chamber. The first seal ring is disposed between the protrusion ring and the first avoidance groove.
In some examples, the pressure boosting device further includes a second seal ring. The second hood has a second avoidance groove at a side of the second hood adjacent to the driver. The second seal ring is disposed at the second avoiding groove.
In some examples, the pressure boosting device further includes at least one fastener penetrating the first hood, the second hood, and the driver to fixedly connect the first hood, the second hood, and the driver.
In some examples, the first hood has a hood cover at a side of the first hood adjacent to the second hood. The driver has a drive shaft configured to drive the plurality of impellers to rotate. The drive shaft has a free end with a limit structure. The limit structure is configured to limit axial displacements of the plurality of impellers. At least part of the limit structure is inserted into and engaged with the hood cover.
In some examples, the limit structure includes a limit nut and a limit spacer. The limit nut is inserted into and engaged with the hood cover through a cylindrical engagement surface. The limit spacer is located between the limit nut and the impeller. An outer diameter a part of the hood cover adjacent to the limit spacer is substantially the same as an outer diameter of the limit spacer.
In some examples, the hood cover is connected to an inner wall surface of the first hood by at least one limit rib. A water passing space in communication with the chamber is formed between the hood cover and the inner wall surface of the first hood.
According to some embodiments of the present disclosure, the driver has a limit shaft provided with a limit sleeve. The limit sleeve is arranged around the drive shaft. The limit sleeve is located between two adjacent impellers of the plurality of impellers. The limit sleeve has two ends respectively abutting against the two adjacent impellers to limit movements of the two adjacent impellers along axis directions of the two adjacent impellers.
In some examples, the driver is a drive motor including a stator and a rotor, and the stator and the rotor are fixedly connected to each other or integrally formed.
In some examples, the plurality of impellers includes a first impeller and a second impeller. The first impeller is located upstream of the second impeller in a water flowing direction.
In some examples, the water outlet being radially located outside the second impeller.
According to some embodiments of the present disclosure, the driver has a drive shaft with a plurality of positioning structures. The plurality of positioning structures corresponds to the plurality of impellers. The driver can drive the plurality of impellers to rotate by cooperating with the plurality of impellers through the plurality of positioning structures. The plurality of positioning structures is offset in a circumferential direction of the drive shaft.
In some examples, each of the plurality of positioning structures is formed as a key protruding from the drive shaft. The key extends along the axis direction of the impeller and has a length smaller than or equal to a thickness of the impeller.
In some examples, the plurality of impellers includes two impellers, and two groups of positioning structures are provided. Each of the two groups of the positioning structures includes two keys spaced from each other in the circumferential direction of the drive shaft.
In some examples, the two groups of the positioning structures are offset by an angle of 90° in the circumferential direction of the drive shaft.
In some examples, the drive shaft has a free end with a limit structure. The limit structure is configured to limit axial displacements of the plurality of impellers. The housing is provided with a hood cover. At least part of the limit structure is inserted into and engaged with the hood cover.
In some examples, the limit structure includes a limit nut and a limit spacer. The limit nut is inserted into and engaged with the hood cover through a cylindrical engagement surface. The limit spacer is located between the limit nut and the impeller. An outer diameter a part of the hood cover adjacent to the limit spacer is substantially the same as an outer diameter of the limit spacer.
In some examples, the limit nut has an assembling direction opposite to a rotation direction of the drive shaft.
In some examples, a part of a periphery of the limit nut is inwardly recessed to form an annular recess. A bottom wall of the annular recess is formed into a square ring shape.
In some examples, the drive shaft includes a fixation section, a drive section, and a limit section that have outer diameters gradually increasing. The limit structure is disposed at the fixation section. The positioning structure is disposed at the drive section. One of the plurality of impellers is adapted to abut against an outer end surface of the limit section.
In some examples, the drive shaft of the driver is provided with a limit sleeve arranged around the drive shaft. The limit sleeve is located between two adjacent impellers of the plurality of impellers. The limit sleeve has two ends respectively abutting against the two adjacent impellers to limit movements of the two adjacent impellers along axis directions of the two adjacent impellers.
In some examples, the driver is a drive motor including a stator and a rotor, and the stator and the rotor are fixedly connected to each other or integrally formed.
In some examples, the pressure boosting device further includes a water guide component disposed between two adjacent impellers of the plurality of impellers. The water guide component is configured to guide water from an outlet of an upstream impeller of the two adjacent impellers to an inlet of a downstream impeller of the two adjacent impellers in a water flowing direction.
A pressure boosting device according to embodiments of a second aspect of the present disclosure includes a housing, a plurality of impellers, a rotor component, and a stator component. The housing has a water inlet and a water outlet. The housing is provided with a fixation shaft. The plurality of impellers is arranged around the fixation shaft and located between the water inlet and the water outlet. Two adjacent impellers of the plurality of impellers cooperate with each other by a connection structure. The rotor component is disposed at the fixation shaft and connected to one of the plurality of impellers. The stator component is configured to drive the rotor component to rotate by cooperating with the rotor component.
According to the pressure boosting device of the embodiments of the present disclosure, by arranging the plurality of impellers, the pressure boosting effect on the water flowing into the housing can be achieved after the water flows through the plurality of impellers. Through the connection between the rotor component and the one of the plurality of impellers, the stator component drives the rotor component to rotate, and the rotation of the rotor component can directly drive this impeller to rotate. The two adjacent impellers of the plurality of impellers are connected by the connection structure, and therefore this impeller can drive the other impellers of the plurality of impellers to rotate, that is, linkage between the rotor component and the plurality of impellers is realized, eliminating a need for transmission of the fixation shaft. In this way, stability of the overall structure is good, and the structure can be simplified with a reduction in requirements for processing accuracy. Thus, cost is reduced while improving transmission efficiency. Therefore, the pressure boosting effect of the pressure boosting device can be enhanced.
According to some embodiments of the present disclosure, the connection structure includes a connection protrusion and an engagement protrusion. The connection protrusion and the engagement protrusion are respectively disposed at the two adjacent impellers and fixedly connected to each other.
In some examples, the connection protrusion includes a plurality of connection bosses arranged at intervals in a circumferential direction of each of the plurality of impellers. A connection groove is formed between two adjacent connection bosses of the plurality of connection bosses. The engagement protrusion includes a plurality of engagement bosses arranged at intervals in the circumferential direction of the impeller. An engagement groove is formed between two adjacent engagement bosses of the plurality of engagement bosses. The plurality of connection bosses is adapted to be inserted into the engagement grooves, and the plurality of engagement bosses is adapted to be inserted into the connection grooves.
In some examples, the connection protrusion and the engagement protrusion each are formed into an annular shape.
According to some embodiments of the present disclosure, the rotor component is connected to one of the plurality of impellers by a plurality of connection ribs.
In some examples, the plurality of connection ribs is arranged at intervals in a circumferential direction of the plurality of impeller.
According to some embodiments of the present disclosure, the rotor component and at least part of each of the plurality of impellers are integrally formed.
In some examples, the impeller includes a blade, a first cover plate, and a second cover plate. The blade is disposed between the first cover plate and the second cover plate. The first cover plate has an opening at a central part of the first cover plate. The second cover plate is fixedly connected to the rotor component.
According to some embodiments of the present disclosure, the pressure boosting device further includes two limit spacers respectively disposed at two ends of the fixation shaft. One of the two limit washers abuts against the impeller, and another one of the two limit spacers abuts against the rotor component.
In some examples, the limit spacer is a ceramic spacer.
According to some embodiments of the present disclosure, the fixation shaft is a ceramic member.
According to some embodiments of the present disclosure, the housing includes a first hood and a second hood. The water inlet is formed at the first hood. The water outlet is formed at the second hood. The fixation shaft has two ends respectively located at the first hood and the second hood.
In some examples, the pressure boosting device further includes a water guide component disposed between the two adjacent impellers. The water guide component is configured to guide water from an outlet of an upstream impeller of the two adjacent impellers to an inlet of a downstream impeller of the two adjacent impellers in a water flowing direction.
A gas water heater according to embodiments of a third aspect of the present disclosure includes the pressure boosting device according to the embodiments of the first aspect of the present disclosure or the pressure boosting device according to the embodiments of the second aspect of the present disclosure. Adopting the above-mentioned pressure boosting device enhances the pressure boosting effect of the pressure boosting device, and ensures use effect of the gas water heater. As a result, the water pressure attenuates slowly as a water flow rate increases. In this way, the user experience is improved. Moreover, the structure of the pressure boosting device is simplified, which improves operational stability of the pressure boosting device and facilitates miniaturization of the gas water heater.
Additional aspects and advantages of the embodiments of present disclosure will be provided at least in part in the following description, or will become apparent in part from the following description, or can be learned from the practice of the embodiments of the present disclosure.
These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions with reference to the accompanying drawings.
pressure boosting device 100, housing 10, water inflow passage 101, water outflow passage 102, water passing space 103, first hood 11, water inlet tube 111, water inlet 1111, shield plate 112, water passing opening 1121, protrusion ring 113, hood cover 114, limit rib 1141, second hood cover 12, water outlet 121, first avoidance groove 122, second avoidance groove 123, driver 20, drive shaft 21, fixation section 211, drive section 212, limit section 213, positioning structure 22, key 221, impeller 30, impeller inlet 301, impeller outlet 302, first cover plate 31, second cover plate 32, blade groove 321, first slot 322, connection part 323, engagement groove 3231, balance hole 3232, blade 34, first blade 341, second blade 342, first protrusion 343, water guide component 40, water guide inlet 401, water guide outlet 402, water guide vane 41, second protrusion 411, water guide hood 42, water guide hood plate 421, avoidance opening 4211, retaining ring 422, water guide base 43, water guide vane groove 431, second slot 432, limit structure 50, limit nut 51, annular recess 511, limit spacer 52, limit sleeve 60, first seal ring 71, second seal ring 72, fixation shaft 81, rotor component 82, connection rib 83, connection protrusion 84, connection boss 842, connection groove 841, engagement protrusion 85, and engagement boss 852.
The embodiments of the present disclosure will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings, throughout which same or similar elements, or elements having same or similar functions, are denoted by same or similar reference numerals. The embodiments described below with reference to the drawings are illustrative only, and are intended to explain rather than limit the present disclosure.
In the description of the present disclosure, it is to be understood that, terms such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “over,” “below,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “in,” “out,” “clockwise,” “anti-clockwise,” “axial,” “radial” and “circumference” refer to the directions and location relations which are the directions and location relations shown in the drawings, and for describing the present disclosure and for describing in simple, and which are not intended to indicate or imply that the device or the elements are disposed to locate at the specific directions or are structured and performed in the specific directions, which could not to be understood to the limitation of the present disclosure. Furthermore, a feature associated with “first” and “second” may comprise one or more this feature distinctly or implicitly. In the description of the present disclosure, “a plurality of” means two or more than two, unless specified otherwise.
In the description of the embodiments of the present disclosure, unless specified or limited otherwise, the technical terms “mounted,” “connected,” and “coupled” are understood broadly, such as fixed, detachable mountings, connections and couplings or integrated, and may be mechanical or electrical mountings, connections and couplings, and also may be direct and via media indirect mountings, connections, and couplings, and further may be inner mountings, connections and couplings of two components or interaction relations between two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the embodiments of the present disclosure may be understood according to specific circumstances.
It was found that a maximum pressure (i.e., a shut-off pressure) of gas heating pressure boosting devices in the related art may reach up to 17 meters with a steep flow rate-head curve. In this case, a water pressure attenuates sharply as a flow rate increases. Therefore, simply having a higher maximum pressure is meaningless. Moreover, these pressure boosting devices generally have a lower efficiency of about 15%, which cannot meet a user's use demands. For example, the gas heating pressure boosting devices in the related art generally have a high rotational speed, leading to howling noise and resonance noise that are major complaints from the user. To this end, the present disclosure provides a pressure boosting device, which can effectively solve the problem of steep flow rate-head curve in which the water pressure attenuates sharply as the flow rate increases, and avoid the resonance noise problem due to the high rotational speed.
A pressure boosting device 100 according to embodiments of the present disclosure will be described below with reference to
As illustrated in
The water guide component 40 is disposed between two adjacent impellers 30. The water guide component 40 can serve to guide the liquid. In the pressure boosting device 100, the water guide component 40 can guide the liquid from an outlet of a front impeller 30 of the two adjacent impellers 30 to an inlet of a rear impeller 30 of the two adjacent impellers 30 in a liquid flowing direction, i.e., in a front-to-rear direction. As a result, the plurality of impellers 30 cooperates with each other to realize muti-stage pressure boosting of the liquid. In this way, a pressure boosting effect of the pressure boosting device 100 can be enhanced. The driver 20 is disposed at the housing 10, and is configured to drive the plurality of impellers 30 to rotate simultaneously by cooperating with the plurality of impellers 30. In this way, the pressure boosting effect of the pressure boosting device 100 can be enhanced.
In the pressure boosting device 100 according to the embodiment of the present disclosure, by arranging the plurality of impellers 30, the pressure boosting effect on the water flowing into the housing 10 can be achieved after the water flows through the plurality of impellers 30. Multi-stage pressure boosting of the liquid can be achieved by providing the water guide component 40 and allowing the plurality of impellers 30 to cooperate with each other. In this way, the pressure boosting effect of the pressure boosting device 100 on the liquid can be enhanced. By driving the plurality of impellers 30 to rotate simultaneously by the driver 20, the number of parts of the pressure boosting device 100 can be reduced. As a result, the pressure boosting device 100 has a compact structure, and the pressure boosting efficiency of the pressure boosting device 100 can be enhanced to improve user experience.
As illustrated in
As illustrated in
In some embodiments, the water inlet 1111 is located below the plurality of impellers 30, and the water outlet 121 is located above the plurality of impellers 30. As such, mounting and an arrangement layout of the pressure boosting device 100 are facilitated in order to make full use of a use space in the gas water heater. In this way, a space occupied by the pressure boosting device 100 can be reduced. As a result, a design requirement for miniaturization of the gas water heater is met while achieving the pressure boosting.
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
In some embodiments, balancing of an axial force is facilitated by additionally forming the balance holes 3232 at different positions. Therefore, the impeller 30 can rotate stably. In this way, operational stability of the impeller 30 is improved.
As illustrated in
As illustrated in
In some examples, the key 221 may extend obliquely in the front-to-rear direction. Therefore, when the key 221 is inserted into and engaged with the engagement groove 3231, a contact area between the key 221 and the engagement groove 3231 can be increased to enhance a transmission effect between the key 221 and the engagement groove 3231. Thus, the pressure boosting effect of the impeller 30 on the liquid can be further enhanced.
In some examples, the plurality of keys 221 may be arranged at equal intervals in a circumferential direction of the drive shaft 21. When the drive shaft 21 drives the impeller 30 to rotate, the plurality of keys 221 can share a shear stress during the rotation of the impeller 30, to reduce a force on a single key 221. In this way, stability of the structure is improved. Thus, a service life of the drive shaft 21 is prolonged.
Each impeller 30 may correspond to two keys 221, and the two keys 221 are offset by an angle of 90° in the circumferential direction of the drive shaft 21, which can avoid a torque borne by the drive shaft 21 when the impeller 30 rotates. As a result, the drive shaft 21 is evenly stressed, and stable pressure boosting of the pressure boosting device 100 can be ensured while prolonging the service life of the drive shaft 21. In this way, the pressure boosting effect is significantly enhanced.
In other embodiments of the present disclosure, each impeller 30 may correspond to more than two keys 221. The keys 221 may also be arranged at unequal intervals in the circumferential direction of the drive shaft 21. For example, each impeller 30 corresponds to three keys 221, and the three keys 221 are arranged at intervals in the circumferential direction of the drive shaft 21. As such, static stability of the drive shaft 21 can be ensured with a prolongation of the service life of the drive shaft 21. In addition, dynamic stability of the drive shaft 21 can also be ensured. Therefore, the impeller 30 can rotate stably. Thus, the liquid is stably boosted by the impeller 30. In this way, the pressure boosting effect can be enhanced.
In some embodiments, when a plurality of impellers 30 is provided and the drive shaft 21 has six keys 221, that is, each impeller 30 corresponds to three keys 221, the plurality of keys 221 may be offset by an angle of 60° in the circumferential direction of the drive shaft 21. That is, projections of the plurality of keys 221 in the front-and-rear direction may be arranged at equal intervals in order to keep the drive shaft 21 stable.
As illustrated in
As illustrated in
In some examples, the blade 34 and the first cover plate 31 are integrally formed and processed using a mold opening process. Therefore, the number of parts of the impeller 30 can be reduced. Moreover, the assembling of the impeller 30 can be realized by simply snapping the first cover plate 31 into the second cover plate 32, which is easy to be operated. The second cover plate 32 is an integrated member and is processed using the mold opening process, which is easy to be processed and has a high structural strength. As a result, the impeller 30 can withstand a higher rotational speed. Thus, the pressure boosting effect of the impeller 30 on the liquid can be further enhanced.
In some examples, the first protrusion 343 is connected to the second cover plate 32 through a thermoplastic process. The first slot 343 may be a through hole to for an easy insertion of the first protrusion 343. An operator may melt a rear end of the first protrusion 343 by using a hot melt gun or a welding gun. The first protrusion 343 and the first slot 343 may be melted into one piece once the first protrusion 343 is re-cooled and formed. Therefore, a fixing effect between the first cover plate 31 and the second cover plate 32 can be enhanced. Moreover, a seal effect between the first cover plate 31 and the second cover plate 32 can be enhanced. As a result, the liquid in the impeller 30 is prevented from leaking from a part other than the opening, which otherwise affects the pressure boosting effect of the impeller 30.
As illustrated in
As illustrated in
In some embodiments, when a rotational angular velocity of the impeller 30 is constant, a centrifugal force of the blade 34 on the liquid increases along an inside-to-outside direction of the impeller 30. Through the cooperation between the first blade 341 and the second blade 342, the liquid is first boosted to a predetermined speed by the first blade 341, and then boosted by the first blade 341 and the second blade 342 together. In this way, an operational pressure of the blade 34 is reduced. As a result, the service life of the blade 34 is prolonged.
In some examples, after the liquid with a low flow rate flows through the impeller inlet 301, the liquid may be in direct contact with the inner end of the first blade 341. The liquid is guided by the first blade 341 when the impeller 30 rotates, and flows out of the impeller outlet 302 in an extending direction of the first blade 341. The liquid with a large flow rate may be in contact with the inner end of the second blade 342 under its own inertia. Further, the liquid may be guided by the second blade 342 when the impeller 30 rotates, and flows out of the impeller outlet 302 in an extending direction of the second blade 342. Therefore, the pressure boosting effect of the impeller 30 on the liquid at different flow rates can be achieved satisfactorily.
In some embodiments, when the liquid located at a front side of the impeller 30 is divided into a plurality of regions, liquid flow rates in different regions are uneven. The stability of the impeller 30 to pressurize the liquid can be improved through the cooperation between the first blade 341 and the second blade 342. Therefore, the turbulent liquid can flow out stably after the pressure of the liquid is boosted by the impeller 30. In this way, the pressure boosting effect of the impeller 30 on the liquid can be enhanced.
In some examples, an inner end of the first blade 341 at a side of the first blade 341 adjacent to the second cover plate 32 abuts against the connection part 323 to avoid a large gap from being generated between the first blade 341 and the second cover plate 32, which would affect the pressure boosting effect. The liquid may flow directly along the first blade 341 after the liquid flows through the impeller inlet 301. In this way, the pressure boosting effect of the impeller 30 on the liquid can be enhanced. As a result, the user experience is improved.
As illustrated in
As illustrated in
As illustrated in
As illustrated in
In some embodiments, α may be within a range of 8°≤α≤15°. α may be 80, 15°, and any one of 8° to 15°. For example, α is 10°, 11°, and 12°, etc. Therefore, the liquid flow rate of the impeller 30 can be increased to improve the pressure boosting efficiency. In addition, the resistance of the second blade 342 to the liquid can be reduced to enhance the pressure boosting effect of the impeller 30 on the water.
As illustrated in
In some embodiments, if DO is too large, the pressure boosting effect of the impeller 30 on the liquid at the small flow rate would be affected, and if DO is too small, the liquid flow rate of the impeller 30 would be affected. Therefore, 0.4D2≤D0≤0.5D2 is satisfied. D0 may be 0.4D2, 0.5D2, and any one from 0.4D2 to 0.5D2. For example, D0 is 0.42D2, 0.45D2, and 0.47D2, etc. Therefore, the liquid flow rate of the impeller 30 can be increased to enhance the pressure boosting effect of the impeller 30 on the liquid.
If D1 is too large, resistance of the second blade 342 to the liquid would be affected, and if D1 is too small, the pressure boosting effect of the impeller 30 on the liquid at the large flow rate would be affected. Therefore, 0.5D2≤D1≤0.6D2 is satisfied. D1 may be 0.5D2, 0.6D2, and any one from 0.5D2 to 0.6D2. For example, D1 is 0.52D2, 0.55D2 and 0.58D2, etc. Therefore, the resistance of the second blade 342 to the liquid can be reduced to increase the liquid flow rate of the impeller 30 and enhance the pressure boosting effect of the impeller 30 on the liquid.
As illustrated in
As illustrated in
As illustrated in
In some embodiments, the water guide inlet 401 is located at a periphery of the water guide component 40, and the water guide outlet 402 is located at a central part of the water guide component 40. Further, the impeller inlet 301 is located at a central part of the impeller 30, and the impeller outlet 302 is located at a periphery of the impeller 30. Since the impeller 30 and the water guide component 40 are coaxially arranged, the impeller outlet 302 of the impeller 30 located at a front side of the water guide component 40 corresponds to the water guide inlet 401, and the impeller inlet 301 of the impeller 30 located at a rear side of the water guide component 40 corresponds to the water guide outlet 402. In this way, the liquid in a previous-stage impeller 30 may directly flows into the water guide inlet 401 through the impeller outlet 302, and then is introduced into the water guide component 40. Further, the liquid in the water guide component 40 may directly flows into the impeller inlet 301 of the next-stage impeller 30 through the water guide outlet 402, and then is introduced into the next-stage impeller 30. As a result, the pressure of the liquid is boosted by the next-stage impeller 30 again. In this way, multi-stage pressure boosting of the liquid is achieved, which can enhance the pressure boosting effect.
The water guide vane 41 is disposed between the water guide hood 42 and the water guide base 43. The water guide vane 41 can change a liquid flowing direction to guide the liquid from the water guide inlet 401 to the water guide outlet 402, and the water guide vane 41 can achieve the pressure boosting of the liquid. As a result, the water guide component 40 cooperates with two adjacent impellers 30 adjacent to the water guide component 40 to boost the pressure of the liquid together and enhance the pressure boosting effect. The water guide base 43 may be fixedly connected to the second hood 12, and an outer peripheral wall of the water guide hood 42 may abut against a wall surface of a chamber in the second hood 12. In this way, it is beneficial to enhancing a water guide effect of the water guide component 40 and easy to assemble. In other embodiment of the present disclosure, the water guide hood 42 may also be fixedly connected to the second hood 12, and accordingly, an outer peripheral wall of the water guide base 43 may abut against a wall surface of a chamber in the second hood 12.
As illustrated in
In some examples, the second protrusion 411 may be connected to the water guide base 43 in a thermoplastic manner. The second slot 432 may be a through hole to facilitate an insertion of the second protrusion 411. The operator may melt a rear end of the second protrusion 411 with a hot melt gun or a welding gun. The second protrusion 411 and the second slot 432 may be melted into one piece once the second protrusion 411 is re-cooled and formed. Therefore, a fixing effect between the water guide hood 42 and the water guide base 43 can be enhanced. Moreover, a seal effect of the water guide component 40 can be enhanced. As a result, the liquid in the water guide component 40 is prevented from leaking from the part other than the opening, which otherwise affects the pressure boosting effect of the pressure boosting device 100.
As illustrated in
As illustrated in
In some examples, the water guide inlet 401 has a dimension gradually increasing in a water guide direction of the water guide component 40. As such, a liquid flow rate of the water guide component 40 can be increased. Thus, the liquid flow rate of the pressure boosting device 100 is increased. In this way, it is beneficial to enhancing the pressure boosting effect of the pressure boosting device 100.
In some examples, the water guide component 40 is fixed to prevent the water guide component 40 from rotating in a liquid flowing direction. In this way, resistance of the water guide component 40 to the liquid is reduced. As a result, the guide effect of the water guide component 40 on the liquid can be enhanced. Thus, the pressure boosting effect of the pressure boosting device 100 can be enhanced.
As illustrated in
As illustrated in
As illustrated in
In some embodiments, the first seal ring 71 is arranged around a periphery of the protrusion ring 113 to fix the first seal ring 71 at the first hood 11, and thus to facilitate the mounting of the first seal ring 71. Further, the first seal ring 71 can be fitted into the first avoidance groove 122 by extending the protrusion ring 113 of the first hood 11 into the second hood 12. The protrusion ring 113 is engaged into the first avoidance groove 122 to compress the first seal ring 71 together to achieve sealing of a periphery of the front side of the pressure boosting device 100, which can provide good seal effect. As a result, the liquid is prevented from leaking from the periphery of the housing 10. In this way, the pressure boosting effect can be enhanced.
As illustrated in
In some embodiments, the second seal ring 72 is arranged around the driver 20 to fix the second seal ring 72 at the driver 20, and thus to facilitate the mounting of the second seal ring 72. Further, the second seal ring 72 can be fitted into the second avoidance groove 123 by abutting the driver 20 with the second hood 12. The driver 20 and the second avoidance groove 123 are engaged with each other to compress the second seal ring 72 together to achieve sealing of a periphery of a rear side of the pressure boosting device 100, which can provide good sealing effect. As a result, the liquid is prevented from leaking from the periphery of the housing 10. In this way, the pressure boosting effect can be enhanced.
In some examples, the pressure boosting device 100 further includes at least one fastener. The fastener may penetrate the first hood 11 and the second hood 12 to fixedly connect the first hood 11 and the second hood 12. The fastener may also penetrate the second hood 12 and the driver 20 to fixedly connect the second hood 12 and the driver 20. The pressure boosting effect of the pressure boosting device 100 can be ensured by fixedly connecting the first hood 11, the second hood 12, and the driver 20.
In some embodiments, the fasteners may also fixedly connect the first hood 11, the second hood 12, and the driver 20 together, and a plurality of fasteners may be provided. The plurality of fasteners is arranged at intervals in a circumferential direction of the driver 20. Therefore, a fixing effect among the first hood 11, the second hood 12, and the driver 20 is enhanced, and sealing performance and the pressure boosting effect of the pressure boosting device 100 are enhanced.
In some embodiments, the fastener may be a screw or a bolt, etc., which is easy to operate and have a good fixing effect.
As illustrated in
As illustrated in
In some examples, the limit nut 51 has an assembling direction opposite to a rotation direction of the drive shaft 21. Therefore, when the drive shaft 21 rotates, the limit nut 51 may be subjected to a force opposite to the assembly direction of the limit nut 51. Thus, the limit nut 51 can realize a self-locking function. In this way, the limit nut 51 can be effectively prevented from loosening or falling off. In addition, a limit capability of the limit spacer 52 on the impeller 30 can be improved to ensure the stable rotation of the impeller 30. As a result, the impeller 30 can stably boost the pressure of the liquid to improve the pressure boosting effect of the impeller 30 on the liquid can be enhanced. Consequently, the reliability of the pressure boosting device 100 is improved.
As illustrated in
As illustrated in
In some embodiments, three limit ribs 1141 may be provided, which can improve structural strength of the connection between the hood cover 114 and the first hood 11 to further improve the rotation stability of the drive shaft 21. In this way, the pressure boosting effect of the pressure boosting device 100 can be enhanced.
As illustrated in
As illustrated in
In some examples, the liquid may be water. Thus, the pressure boosting device 100 may be used in a gas water heater or a water pump.
As illustrated in
In some examples, the gas water heater is usually hung on a wall surface. The gas water heater has a height and a length that are much greater than a thickness thereof. Therefore, pleasing product aesthetics is improved while facilitating the mounting and reducing space occupancy. The pressure boosting device 100 may be mounted inside the gas water heater. The plurality of impellers 30 of the pressure boosting device 100 may be arranged along a length direction of the gas water heater, i.e., an axis direction of the impeller 30 (a front-to-rear direction as illustrated in
As illustrated in
The driver 20 is disposed at the housing 10 and has a drive shaft 21. The driver 20 is configured to drive the drive shaft 21 to rotate. The drive shaft 21 has a plurality of positioning structures 22. The drive shaft 21 can drive the plurality of positioning structures 22 to rotate about an axis of the drive shaft 21. The plurality of positioning structures 22 corresponds to the plurality of impellers 30 to facilitate the cooperation between the plurality of positioning structures 22 and the plurality of impellers 30, in order that the plurality of impellers 30 rotates together with the plurality of positioning structures 22, i.e., the driver 20 may drive the plurality of impellers 30 to rotate simultaneously by cooperating with the plurality of impellers 30 through the plurality of positioning structures 22, enhancing the pressure boosting effect. The plurality of positioning structures 22 is offset in a circumferential direction of the drive shaft 21 to facilitate offsetting of the torque borne by the drive shaft 21 when the plurality of impellers 30 rotates. As a result, the drive shaft 21 is evenly stressed. In this way, the service life is improved.
According to the pressure boosting device 100 of the embodiment of the present disclosure, by arranging the plurality of impellers 30, the pressure boosting effect on the water flowing into the housing 10 can be achieved after the water flows through the plurality of impellers 30. By arranging the plurality of positioning structures 22 at the drive shaft 21, the drive shaft 21 may drive the plurality of impellers 30 to rotate by cooperating with the plurality of impellers 30 through the plurality of positioning structures 22, and then the driver 20 in turn may drive the plurality of impellers 30 to rotate simultaneously by driving the drive shaft 21 to rotate. In this way, the transmission efficiency can be improved. Thus, the pressure boosting efficiency is improved. By arranging the plurality of positioning structures 22 offset in the circumferential direction of the drive shaft 21, the torque borne by the drive shaft 21 is easily offset when the impeller 30 rotates. As a result, the drive shaft 21 is evenly stressed. The stable pressure boosting of the pressure boosting device 100 can be ensured while increasing the service life of the drive shaft 21. In this way, the pressure boosting effect is greatly enhanced.
As illustrated in
In some examples, the key 221 may extend obliquely in the front-to-rear direction. Therefore, when the key 221 is inserted into and engaged with the impeller 30, a contact area between the key 221 and the impeller 30 can be increased to enhance the transmission effect between the key 221 and the impeller 30. Thus, the pressure boosting effect of the impeller 30 on the liquid can be enhanced.
As illustrated in
The two groups of positioning structures 22 are offset from each other by an angle of 90° in the circumferential direction of the drive shaft 21, which can offset torque borne by the drive shaft 21 when the impeller 30 rotates. As a result, the drive shaft 21 is evenly stressed, and the stable pressure boosting of the pressure boosting device 100 can be guaranteed while prolonging the service life of the drive shaft 21. In this way, the pressure boosting effect is greatly enhanced.
In other embodiments of the present disclosure, each of the two groups of positioning structure 22 may include more than two keys 221. The keys 221 may also be arranged at unequal intervals in the circumferential direction of the drive shaft 21. For example, each of the two groups of positioning structures 22 may include three keys 221, and the three keys 221 are arranged at intervals in the circumferential direction of the drive shaft 21. As such, the static stability of the drive shaft 21 can be ensured with the prolongation of the service life of the drive shaft 21. In addition, the dynamic stability of the drive shaft 21 can be ensured. Therefore, the impeller 30 rotates stably. Thus, the pressure of the liquid is stably boosted by the impeller 30. In this way, the pressure boosting effect can be enhanced.
In some embodiments, when the two groups of positioning structures 22 each include three keys 221, the two groups of positioning structures 22 may be offset by an angle of 60° in the circumferential direction of the drive shaft 21. That is, projections of the plurality of keys 221 may be arranged at equal intervals in the front-to-rear direction in order to keep the drive shaft 21 stable.
As illustrated in
In some examples, the first hood 11 is provided with a hood cover 114, and at least part of the limit structure 50 is inserted into and engaged with the hood cover 114. Therefore, a front end of the drive shaft 21 may be fixed at the housing 10, realizing a limit support at the end portion of the drive shaft 21. In this way, it is beneficial to ensuring the structural stability of the drive shaft 21. Meanwhile, the length of the drive shaft 21 can be increased, and the limitation of the dimension of the housing 10 on the length of the drive shaft 21 is reduced. As a result, it is beneficial to arranging the plurality of impellers 30 at the drive shaft 21 to enhance the pressure boosting effect of the pressure boosting device 100 while saving the space.
As illustrated in
In some embodiments, the driving section 212 has a relatively larger outer diameter in a direction away from the driver 20 (in the front-to-rear direction as shown in
As illustrated in
As illustrated in
In some examples, the water guide component 40 has an avoidance opening 4211 at a central part of the water guide component 40. The water guide component 40 may be mounted at the drive shaft 21 through the avoidance opening 4211, and the limit sleeve 60 may pass through the avoidance opening 4211 to axially limit each of the impellers 30 at a front side and a rear side of the water guide component 40, to prevent the interference of the two adjacent impellers 30 due to the movements of the two adjacent impellers 30. In this way, the reliability of the pressure boosting device 100 is improved.
As illustrated in
As illustrated in
According to the pressure boosting device 100 of the embodiments of the present disclosure, by arranging the plurality of impellers 30, the pressure boosting effect on the water flowing into the housing 10 can be achieved after the water flows through the plurality of impellers 30. The stator component, through the connection between the rotor component 82 and the one of the plurality of impellers 30, drives the rotor component 82 to rotate, and the rotation of the rotor component 82 can directly drive this impeller 30 to rotate. The two adjacent impellers 30 of the plurality of impellers 30 are connected by the connection structure, and therefore this impeller 30 can drive the other impellers 30 of the plurality of impellers 30 to rotate, that is, the linkage between the rotor component 82 and the plurality of impellers 30 is realized, eliminating the need for transmission of the fixation shaft 81. In this way, the stability of the overall structure is good, and the structure can be simplified with a reduction in requirements for processing accuracy. Thus, cost is reduced while improving transmission efficiency. Therefore, the pressure boosting effect of the pressure boosting device 100 can be enhanced.
As illustrated in
In some embodiments, since the connection structure is located between the two adjacent impellers 30, the connection structure abuts with each of the two adjacent impellers to allow the plurality of impellers 30 to be fixed at the fixation shaft 81, and thus to avoid axial displacements of the plurality of impellers 30. In this way, the rotation stability of the plurality of impellers 30 is improved.
In some embodiments, the connection protrusion 84 and one of the two adjacent impellers 30 may be integrally formed, and the engagement protrusion 85 and the other one of the two adjacent impellers 30 may be integrally formed. As such, processing is facilitated, and the structure is further simplified. Moreover, structural strength between the impeller 30 and the connection protrusion 84, and structural strength between the impeller 30 and the engagement protrusion 85 are improved. As a result, the impeller 30 and the connection structure can withstand a higher rotational speed. Thus, the pressure boosting effect of the pressure boosting device 100 is enhanced to facilitate adaptation of the pressure boosting device 100 to various operational conditions. In this way, the user experience is improved.
In some examples, the connection structure may be a coupler. The coupler is arranged between two adjacent impellers 30 to fixedly connect the two adjacent impellers 30. While ensuring that the two adjacent impellers 30 rotate together, the linked impellers 30 can be prevented from being subjected to excessive loads to provide an overload protection.
As illustrated in
In other embodiments of the present disclosure, the connection protrusion 84 may also include a plurality of snap structures, and the engagement protrusion 85 may also include a plurality of snap slots. The two adjacent impellers 30 may be fixedly connected by snapping the snap structure into the snap slot. Thus, the two adjacent impellers 30 rotate synchronously. In this way, operation and maintenance are facilitated, and cost is reduced.
In some examples, the connection protrusion 84 and the engagement protrusion 85 each are formed into an annular shape, which can improve structural strength of the connection structure. As a result, the connection structure is evenly stressed when the plurality of impellers 30 rotates. Therefore, the connection structure can withstand a greater shear force to facilitate stable transmission of torque by the connection structure. In this way, a rotation effect can be enhanced.
As illustrated in
In some embodiments, the stator component drives the rotor component 82 to rotate, to allow the plurality of connection ribs 83 and an impeller 30 connected to the plurality of connection ribs 83 to rotate, and the impeller 30 in turn can drive a connection structure adjacent to the impeller 30 to rotate, to allow the plurality of impellers 30 to rotate together. In this way, the linkage between the rotor component 82 and the plurality of impellers 30 can be realized. No intermediate component needed to be provided for transmission, which can simplify the structure. As a result, the cost is reduced while improving the transmission efficiency. Thus, the pressure boosting effect of the pressure boosting device 100 can be enhanced.
As illustrated in
According to some embodiments of the present disclosure, the rotor component 82 and at least part of the impeller 30 may be integrally formed, which facilitates the processing, further simplifying the components, and thus can improve the structural strength of the connection between the rotor component 82 and the impeller 30. As a result, the impeller 30 can withstand a higher rotational speed. Thus, the pressure boosting effect of the pressure boosting device 100 is enhanced to facilitate the adaptation of the pressure boosting device 100 to the various operational conditions. In this way, the user experience is improved. The rotor component 82 and at least part of the impeller 30 adjacent to the rotor component 82 may be integrally formed, which facilitates assembling and disassembling. Therefore, interference of the plurality of impellers 30 due to movements of the plurality of impellers 30 can be avoided, which facilitates later maintenance.
In some embodiments, the integral forming of the rotor component 82 and the impeller 30 may be achieved as follows. A support structure, i.e., a plurality of connection ribs 83, is first processed at the rear side of the impeller 30 using a mold-opening process. Then, a magnet structure is mounted at ends of the plurality of connection ribs 83 away from the impeller 30, that is, the rotor component 82 is injection molded. At last, an outer ring of the rotor component 82 is rounded off.
As illustrated in
As illustrated in
In some examples, the limit spacer 52 may be a ceramic spacer. When the plurality of impellers 30 rotates, the plurality of impellers 30 rubs against the limit spacers 52 located at the front side and the rear side of the impeller 30. Since the limit spacer 52 made of the ceramic material has a self-lubricating property, friction resistance can be reduced. As a result, the rotation of the impeller 30 is smoother. In this way, the pressure boosting effect of the impeller 30 on the liquid is enhanced.
According to some embodiments of the present disclosure, the fixation shaft 81 is a smooth shaft, and the entire shaft has a consistent diameter, which can effectively support the impeller 30 and withstand the centrifugal force caused by the rotation of the impeller 30. The rear end and the front end of the fixation shaft 81 are fixed at the housing 10, which can ensure the stability of the fixation shaft 81. When the impeller 30 rotates, the fixation shaft 81 is stationary. The fixation shaft 81 mainly supports and stabilizes the impeller 30. The fixation shaft 81 may be a ceramic member. Since the ceramic member of the self-lubricating property can reduce the friction resistance, the rotation of the impeller 30 is smoother. In this way, the pressure boosting effect of the impeller 30 on the liquid is enhanced.
As illustrated in
As illustrated in
As illustrated in
In some examples, the liquid may be water. Thus, the pressure boosting device 100 may be used in a gas water heater or a water pump.
As illustrated in
As illustrated in
As illustrated in
In some embodiments, the water inlet 1111 is located below the plurality of impellers 30, and the water outlet 121 is located above the plurality of impellers 30. As such, mounting and a position layout of the pressure boosting device 100 are facilitated in order to make full use of a use space in the gas water heater. In this way, the space occupied by the pressure boosting device 100 can be reduced. As a result, the design requirement for the miniaturization of the gas water heater is met while achieving the pressure boosting.
As illustrated in
As illustrated in
As illustrated in
As illustrated in
The other structures and operations of the gas water heater according to the embodiments of the present disclosure are known to those skilled in the art, and the description thereof in detail will be omitted herein. In the description of the present disclosure, “first characteristic” and “second characteristic” may include one or more of these characteristics. An up-down direction, a left-right direction, and a front-rear direction are based on the up-down direction, the left-right direction, and the front-rear direction shown in the figures.
In the description of the present disclosure, unless specified or limited otherwise, a first characteristic is “on” or “under” a second characteristic refers to the first characteristic and the second characteristic may be direct or via their other characteristic indirect mountings, connections, and couplings. And, the first characteristic is “on,” “above,” “over” the second characteristic may refer to the first characteristic is right over the second characteristic or is diagonal above the second characteristic, or just refer to the horizontal height of the first characteristic is higher than the horizontal height of the second characteristic.
In the description of this specification, descriptions with reference to the terms “an embodiment,” “some embodiments,” “an exemplary embodiment,” “an example,” “a specific example,” or “some examples” etc., mean that specific features, structure, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
Although embodiments of the present disclosure have been illustrated and described, it is conceivable for those of ordinary skill in the art that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure. The scope of the invention shall be defined by the claims as appended and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211714642.9 | Dec 2022 | CN | national |
| 202223592132.7 | Dec 2022 | CN | national |
| 202223592146.9 | Dec 2022 | CN | national |
| 202223592158.1 | Dec 2022 | CN | national |
This application is a continuation of International Application No. PCT/CN2023/091607, filed on Apr. 28, 2023, which claims priority to Chinese Patent Application Nos. 202211714642.9, 202223592132.7, 202223592146.9, and 202223592158.1, filed on Dec. 29, 2022, the entire disclosures of all of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2023/091607 | Apr 2023 | WO |
| Child | 18911905 | US |
