Patent Application
20220107096
The present disclosure relates to the field of air-conditioning technologies, and particularly to an air guiding device, an air conditioner indoor unit having the air guiding device, and an air-conditioning system having the air conditioner indoor unit.
In related art, an air guiding device of an air conditioner is configured to guide airflow blown out of an air outlet of the air conditioner, and the air outlet of the air conditioner is also provided with a grid for straightening the airflow blown out. In a prior art, the air guiding device can change a flowing direction of the airflow by rotating. However, since the grid at the air outlet is fixed, when the air guiding device rotates, the grid cannot effectively straighten the airflow under different working conditions, and may even hinder airflow that is blown from certain angles, causing an adverse effect on the air output and temperature adjustment effect of the air conditioner.
The present disclosure is intended to solve one of the technical problems in the related technologies to at least some extent.
For this reason, an objective of the present disclosure is to provide an air guiding device that can ensure that an air-conditioning system has a large air output and a good flow straightening effect.
Another objective of the present disclosure is to provide an air conditioner indoor unit with the above-mentioned air guiding device.
A yet another objective of the present disclosure is to provide an air-conditioning system with the above-mentioned air conditioner indoor unit.
An air guiding device according to an embodiment of the present disclosure, including: an air guiding part configured to guide airflow blown out of an air outlet of an air-conditioning system, the air guiding part being configured to rotate to change a guiding angle of the air guiding part for the airflow, at least one side of the air guiding part along a flowing direction of the airflow being provided with a flow straightening grid.
In the air guiding device according to the embodiment of the present disclosure, since the rotatable air guiding part is provided, at least one side of the air guiding part along the flowing direction of the airflow is provided with the flow straightening grid, and the flow straightening grid can rotate to different directions along with the air guiding part to straighten the airflow guided by the air guiding part, thereby achieving a good flow straightening effect and ensuring the air-conditioning system to have a large air output.
According to some embodiments of the present disclosure, a plurality of air guiding parts are provided, and all the air guiding parts are located in different positions at the air outlet.
According to some embodiments of the present disclosure, the plurality of air guiding parts are arranged in sequence along a length direction of the air outlet.
According to some embodiments of the present disclosure, two ends of the air outlet in the length direction are each provided with an air-guide-part drive device, and each of the air-guide-part drive devices is configured to drive one of the air guiding parts to rotate.
According to some embodiments of the present disclosure, three or more air guiding parts are provided, a mounting part is arranged between every two adjacent ones of the air guiding parts, the mounting parts are fixed on the air-conditioning system, each of the mounting parts is provided with an air-guide-part drive device, and each of the air-guide-part drive devices is configured to drive at least one of the air guiding parts to rotate.
According to some embodiments of the present disclosure, the plurality of air guiding parts are arranged in sequence along a width direction of the air outlet, and at least one end of the air outlet in a length direction is provided with an air-guide-part drive device for driving the air guiding part to rotate.
According to some embodiments of the present disclosure, an end cap is fitted over each of two ends of the air guiding device in a length direction of the air outlet, a mounting space is defined in the end cap, and an air-guide-part drive device for driving the air guiding part to rotate is arranged in the mounting space.
According to some embodiments of the present disclosure, the end cap is fixed to at least one of the air guiding parts and provided with an avoidance notch for avoiding the air-guide-part drive device when rotating together with the air guiding part.
According to some embodiments of the present disclosure, the end cap is fixed in the air-conditioning system.
According to some embodiments of the present disclosure, the air guiding device includes: a louver sweeping structure, a louver drive structure, and a louver transmission structure, at least one of the air guiding parts is provided with the louver sweeping structure, a plurality of sweeping blades of the louver sweeping structure are spaced apart and swingable along a rotation axis of the air guiding part, and the louver drive structure is configured to cause, through the louver transmission structure, the plurality of sweeping blades of the louver sweeping structure to swing along the rotation axis of the air guiding part.
According to some embodiments of the present disclosure, the air guiding part includes: an inner air guiding plate and an outer air guiding plate, the inner air guiding plate is connected to the outer air guiding plate, a mounting cavity is formed between the inner air guiding plate and the outer air guiding plate, a heat insulating material is arranged in the mounting cavity, and an airflow guide surface is formed on a side surface of the inner air guiding plate facing away from the mounting cavity.
According to some embodiments of the present disclosure, the airflow guide surface is provided with a mounting hole in communication with the mounting cavity, a part of the louver drive structure is configured to extend through the mounting hole into the mounting cavity, and the louver sweeping structure is mounted at the airflow guide surface.
According to some embodiments of the present disclosure, the inner air guiding plate, the outer air guiding plate and the sweeping blades are integrally formed.
According to some embodiments of the present disclosure, each of the air guiding parts includes an arc-shaped plate, a surface of the arc-shaped plate is configured as an airflow guide surface, an axis of a cylinder where the arc-shaped plate is located serves as a rotation axis of the air guiding part, and at least one end of the arc-shaped plate in an axial direction is provided with a connecting plate configured to be in rotatory fit with the air-guide-part drive device.
According to some embodiments of the present disclosure, the flow straightening grid has a horizontal flow straightening plate and a longitudinal flow straightening plate, the horizontal flow straightening plate and the longitudinal flow straightening plate are cross-connected to form a flow straightening hole, and the horizontal flow straightening plate is parallel to a circumferential end surface of the arc-shaped plate.
According to some embodiments of the present disclosure, the outer air guiding plate is configured to be in tight fit with an opening edge of the air outlet when the air guiding part guides the airflow blown out of the air outlet of the air-conditioning system.
According to some embodiments of the present disclosure, the air guiding part has a blocking position for blocking the air outlet, a hot air guiding position for guiding the airflow downward, and a cold air guiding position for guiding the airflow upward.
According to some embodiments of the present disclosure, when the air guiding part is at the hot air guiding position or the cold air guiding position, an outline of an airflow guide surface of the air guiding part is in smooth connection with an outline of an internal air channel of the air-conditioning system, the air guiding part is configured to rotate from the blocking position to the hot air guiding position by an angle α, and the air guiding part is configured to rotate from the blocking position to the cold air guiding position by an angle β, wherein α is 30°-80° and β is 40°-110°.
According to some embodiments of the present disclosure, the air guiding device includes a mounting box for accommodating a first motor and the mounting box includes an arc-shaped outer wall. The air guiding part is configured to be connected to the first motor so that the air guiding part is driven to rotate around the arc-shaped outer wall. A center point of a contour line of a cross section of the air guiding part is not coincident with a rotation axis of the air guiding part. A line on an inner surface of the air guiding part in parallel with the rotation axis serves as a reference line, and the reference line is parallel to the arc-shaped outer wall. When the air guiding part moves, a distance between the reference line and the arc-shaped outer wall is equal.
According to some embodiments of the present disclosure, the distance between the reference line and the arc-shaped outer wall is 1 mm-6 mm.
Further, the distance between the reference line and the arc-shaped outer wall is 3 mm.
According to some embodiments of the present disclosure, a cross section of the arc-shaped outer wall on a plane perpendicular to the rotation axis is a curve, and the curve is at least a part of an ellipse.
According to some embodiments of the present disclosure, the reference line is located in the middle of an inner surface of the air guiding plate.
According to some embodiments of the present disclosure, the air guiding part includes an inner air guiding plate and an outer air guiding plate, and the inner air guiding plate is connected to the outer air guiding plate. A surface of the inner air guiding plate facing away from the outer air guiding plate is configured as the inner surface, and a surface of the outer air guiding plate facing away from the inner air guiding plate is configured as an outer surface.
According to some embodiments of the present disclosure, the inner air guiding plate and the outer air guiding plate define a mounting cavity, and the mounting cavity has a connecting rib therein to connect the outer air guiding plate with the inner air guiding plate.
According to some embodiments of the present disclosure, at least one of the outer air guiding plate and the inner air guiding plate is arc-shaped.
According to some embodiments of the present disclosure, the air guiding device has a closed state for closing the air outlet of the air conditioner and an open state for opening the air outlet. The air guiding device includes: an outer air guiding plate; an inner air guiding plate arranged on the outer air guiding plate and slidable relative to the outer air guiding plate, the inner air guiding plate extending beyond a front edge or a rear edge of the outer air guiding plate to close the air outlet of the air conditioner together with the outer air guiding plate when the air guiding device is in the closed state, the inner air guiding plate being accommodated on an inner side of the outer air guiding plate when the air guiding device is in the open state; and a sliding drive device configured to drive the inner air guiding plate and the outer air guiding plate to slide relative to each other.
According to some embodiments of the present disclosure, when the air guiding device is in the closed state, the inner air guiding plate extends beyond the front edge of the outer air guiding plate.
According to some embodiments of the present disclosure, when the air guiding device is in the open state, a front edge of the inner air guiding plate coincides with the front edge of the outer air guiding plate.
According to some embodiments of the present disclosure, the inner air guiding plate and the outer air guiding plate are each an arc-shaped plate having a middle part protruding outward relative to front and rear edges.
According to some embodiments of the present disclosure, when the air guiding device is in the open state, the front edge and the rear edge of the inner air guiding plate are in contact with the outer air guiding plate respectively, and the middle part of the inner air guiding plate is spaced apart from the outer air guiding plate.
According to some embodiments of the present disclosure, the rear edge of the outer air guiding plate is provided with a limiting boss, and when the air guiding device is in the open state, the rear edge of the inner air guiding plate abuts against the limiting boss.
According to some embodiments of the present disclosure, one of an outer surface of the inner air guiding plate and an inner surface of the outer air guiding plate is provided with a sliding boss and the other one thereof is provided with a slideway. The slideway is slidably fitted in the slideway.
According to some embodiments of the present disclosure, the sliding boss is arranged on the outer surface of the inner air guiding plate and adjacent to a rear edge of the inner air guiding plate.
According to some embodiments of the present disclosure, the inner surface of the outer air guiding plate is provided with a rotating shaft base, and the outer air guiding plate is reversibly arranged on the air conditioner through the rotating shaft base.
According to some embodiments of the present disclosure, the inner air guiding plate is provided with an avoidance groove for avoiding the rotating shaft base.
According to some embodiments of the present disclosure, two rotating shaft bases are provided and arranged adjacent to two ends of the outer air guiding plate, respectively.
According to some embodiments of the present disclosure, the sliding drive device includes: a second motor; a gear in transmission connection with the second motor; and a rack arranged on the inner air guiding plate and engaged with the gear.
According to some embodiments of the present disclosure, two sliding drive devices are provided and arranged adjacent to two ends of the inner air guiding plate, respectively.
An air conditioner indoor unit according to an embodiment of the present disclosure includes the above-mentioned air guiding device.
In the air conditioner indoor unit according to the embodiment of the present disclosure, the flow straightening grid can rotate to different directions along with the air guiding part to straighten the airflow guided by the air guiding part, thereby achieving a good flow straightening effect and ensuring the air-conditioning system to have a large air output.
An air-conditioning system according to an embodiment of the present disclosure includes the above-mentioned air conditioner indoor unit.
In the air-conditioning system according to the embodiment of the present disclosure, the flow straightening grid can rotate to different directions along with the air guiding part to straighten the airflow guided by the air guiding part, thereby achieving a good flow straightening effect and ensuring the air-conditioning system to have a large air output.
air conditioner indoor unit 1000;
air guiding device 100; first air guiding part 11; second air guiding part 12; airflow guide surface 13; mounting hole 131;
connecting plate 14; inner air guiding plate 15; outer air guiding plate 16; mounting cavity 17; limit protrusion 18;
air-guide-part drive device 2; end cap 3; mounting space 31; avoidance notch 32; louver sweeping structure 41; sweeping blade 411; via hole 412; louver transmission structure 42; pull rod 421; transition transmission rod 422; push protrusion 423; limit hole; louver drive structure 43;
flow straightening grid 5; horizontal flow straightening plate 51; longitudinal flow straightening plate 52; flow straightening hole 53; integrated motor 6; bottom plate 200; air outlet 300;
limiting boss 161; slideway 163; rotating shaft base 162; sliding boss 151; avoidance groove 152; sliding drive device 30; second motor 310; gear 320, rack 330;
mounting box 110; outer wall 111; first motor 130; motor shaft 132.
Embodiments of the present disclosure will be described below in detail. Examples of the embodiments are illustrated in the accompanying drawings, where the same or similar reference numerals throughout the specification refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be illustrative, but should not be construed as limiting the present disclosure.
An air guiding device 100 according to an embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.
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In some optional embodiments of the present disclosure, the plurality of air guiding parts are arranged in sequence along a length direction of the air outlet 300 (i.e., along a direction of the rotation axis of the air guiding part). In this way, the plurality of air guiding parts can guide the airflow blown from different positions in the length direction of the air outlet 300 to different directions, and the blowing angle is free, which can meet the requirement of the air-conditioning system to simultaneously blow airflow in multiple directions.
In some exemplary embodiments, two air guiding parts are provided and arranged along the length direction of the air outlet 300, and two ends of the air outlet 300 in the length direction are each provided with an air-guide-part drive device 2, and each of the air-guide-part drive devices 2 is configured to drive the air guiding part adjacent to the air-guide-part drive device 2 to rotate. For example, the air-guide-part drive device 2 is configured as a motor, and a motor output shaft of the air-guide-part drive device 2 may be connected to the air guiding part to drive the air guiding part to rotate.
In other exemplary embodiments, three or more air guiding parts are provided, and along the length direction of the air outlet 300, a mounting part is between every two adjacent air guiding parts. The mounting parts are fixed on the air-conditioning system (e.g., the mounting parts are fixed to a bottom plate 200 of the air-conditioning system), each of the mounting parts is provided with an air-guide-part drive device 2, and each of the air-guide-part drive device 2 is configured to drive at least one air guiding part to rotate. For example, each of the air-guide-part drive devices 2 can drive the adjacent air guiding part on one or two sides to rotate.
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The end cap 3 is provided therein with a mounting space 31, and the mounting space 31 is provided with an air-guide-part drive device 2 for driving the air guiding part to rotate, so that the end cap 3 protects the air-guide-part drive device 2 for driving the air guiding part.
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In some embodiments, both the louver drive structure 43 and the air-guide-part drive device 2 can be fixed in the air-conditioning system (for example, fixed to the bottom plate 200), and the louver drive structure 43 and the air-guide-part drive device 2 can be mounted in the mounting cavity 17. In this way, the louver drive structure 43 can avoid the airflow guide surface 13 so that the airflow can be blown into the room through the airflow guide surface 13.
For example, the mounting cavity 17 of the end cap 3 is provided therein with an integrated motor 6. The integrated motor 6 has an air guiding part output shaft and a louver output shaft. The air guiding part output shaft forms the air-guide-part drive device 2, and the louver output shaft forms a louver drive structure 43. In this way, the integrated motor 6 can simultaneously output power to realize the rotation of the air guiding part and the swing of the sweeping blade 411, thereby achieving better integration effect and easier arrangement.
Further, a free end of a part of the transitional transmission rod 422 after passing through the limit hole 424 is provided with a bent limit segment configured to limit the pull rod 421, and the bent limit segment can prevent the transition transmission rod 422 from running out of the limit hole 424 when the pull rod 421 moves along the arrangement direction of the plurality of sweeping blades 411.
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In some exemplary embodiments, the inner air guiding plate 15, the outer air guiding plate 16 and the sweeping blades 411 are integrally formed. Therefore, the air guiding part has high overall strength and is convenient to install. Further, the sweeping blade 411 is made of a flexible part (for example, a plastic part; the inner air guiding plate 15, the outer air guiding plate 16 and the sweeping blades 411 are integral injection molded parts), thereby facilitating deformation of the sweeping blades 411 relative to the inner air guiding plate 15 and the swing of the sweeping blades 411.
In other exemplary embodiments, the inner air guiding plate 15, the outer air guiding plate 16 and the sweeping blade 411 may be separately manufactured and subsequently fixed by means of bonding or the like. In this way, the manufacture of the air guiding part can be facilitated.
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Further, the longitudinal flow straightening plate 52 can extend along the circumferential direction of the arc-shaped plate, and thus, the flow straightening grid 5 can form the circumferentially extending part of the arc-shaped plate, so that the arc surface of the air guiding part is larger, and a better visual effect is achieved.
For example, the outer air guiding plate 16 is configured to be in tight fit with an opening edge of the air outlet 300 when the air guiding part guides the airflow blown out of the air outlet 300 of the air-conditioning system. For example, when the air guiding part guides the airflow blown out of the air outlet 300 of the air-conditioning system, a gap between the outer air guiding plate 16 and the opening edge of the air outlet 300 can be less than 5 mm, so that the outer air guiding plate 16 and the opening edge of the air outlet 300 are relatively sealed to prevent dust from entering the air-conditioning system from the gap between the outer air guiding plate 16 and the opening edge of the air outlet 300.
According to some embodiments of the present disclosure, the air guiding part has a blocking position for blocking the air outlet 300, a hot air guiding position for guiding the airflow downward, and a cold air guiding position for guiding the airflow upward.
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In some exemplary embodiments, when the air guiding part is at the hot air guiding position or the cold air guiding position, an outline of the airflow guide surface 13 of the air guiding part is in smooth connection with an outline of an internal air channel of the air-conditioning system. In other words, when the air guiding part is at the hot air guiding position, the outline of the airflow guide surface 13 of the air guiding part is in smooth connection with the outline of the internal air channel of the air-conditioning system at the air outlet 300, and hot air blown out of the air outlet 300 can be smoothly blown out from the air guiding part. When the air guiding part is at the cold air guiding position, the airflow guide surface 13 of the air guiding part is in smooth connection with the outline of the internal air channel of the air-conditioning system at the air outlet 300, and cold air blown out of the air outlet 300 can be smoothly blown out from the air guiding part.
The air guiding part is configured to rotate by an angle α from the blocking position to the hot air guiding position, and the air guiding part is configured to rotate by an angle β from the blocking position to the cold air guiding position. For example, α is within a range of 30°-80°. Therefore, the angle of the air guiding part is reasonable so that the hot air blown out of the air outlet 300 during the heating of the air conditioner can be discharged smoothly, with a large air volume and low noise. For example β is within a range of 40°-110°. Therefore, the angle of the air guiding part is reasonable so that the cold air blown out of the air outlet 300 during the refrigeration of the air conditioner can be discharged smoothly, with a large air volume and low noise.
For example, α is 55° and β is 80°. As a result, the angle of the air guiding part is further reasonable, and the airflow blown out of the air outlet 300 can be discharged smoothly, with a large air volume and low noise.
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It can also be understood that, during the movement of the air guiding part, there is always a certain space between the air guiding part and the arc-shaped outer wall 111. In this way, when the air guiding part rotates in a larger angular range around the mounting box 110, the probability of interference between any part of the air guiding part and the mounting box 110 can be reduced, thereby improving the reliability of the air guiding part. Moreover, by setting the arc-shaped outer wall 111 to be always parallel to the reference line, the outline of the arc-shaped outer wall 111 (e.g., S1 shown in
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Further, in practical applications, when d is 3 mm, the mounting box 110 can have enough accommodating space for accommodating the first motor 130, and moreover it is satisfied that the air guiding part and the mounting box 110 do not interfere with each other, the layout of the air guiding part and the mounting box 110 is compact, thereby optimizing the spatial layout of the air conditioner indoor unit 1000.
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In addition, since the connecting rib can be provided in the mounting cavity 17 to connect the outer air guiding plate 16 and the inner air guiding plate 15, the outer air guiding plate 16 and the inner air guiding plate 15 can be formed as a whole, so that the outer air guiding plate 16 and the inner air guiding plate 15 keep moving synchronously to improve the reliability of the air guiding part. In addition, based on the airtightness of the mounting cavity 17, the connecting rib cannot be exposed to the outside, thereby beautifying the appearance of the air conditioner indoor unit 1000.
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Therefore, by providing the inner air guiding plate 15 and the outer air guiding plate 16 which can slide relative to each other, when the air outlet of the air conditioner needs to be closed, the inner air guiding plate 15 can extend beyond the front or rear edge of the outer air guiding plate 16 so that the inner air guiding plate 15 and the outer air guiding plate 16 are spread out to each other to expand a windshield area of the air guiding device 100, thereby ensuring the reliable closing of the air outlet; and when the air outlet of the air conditioner needs to be opened, the inner air guiding plate 15 is accommodated on the inner side of the outer air guiding plate 16 so that the inner air guiding plate 15 and the outer air guiding plate 16 overlap each other to reduce the windshield area of the air guiding device 100.
Moreover, compared with an air guiding plate of an air conditioner in a related art, the inner air guiding plate 15 and the outer air guiding plate 16 provided in the present disclosure can slide relative to each other so as to control the windshield area of the air guiding device 100, and thus the reliable closing of the air outlet can be ensured, and the adverse effect of the air guiding device 100 on the outlet air volume can be reduced, thereby ensuring the air supply effect of the air conditioner.
In addition, by providing the inner air guiding plate 15 and the outer air guiding plate 16 which can slide relative to each other, the windshield area of the air guiding device 100 can be adjusted, and there is no need to reduce the area of the air outlet in order to ensure that the air guiding plate closes the air outlet, thereby further increasing the outlet air volume.
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An air conditioner indoor unit 1000 according to an embodiment of the present disclosure is described as follows.
The air conditioner indoor unit 1000 according to the embodiment of the present disclosure is provided with the above-mentioned air guiding device 100.
In the air conditioner indoor unit 1000 according to the embodiment of the present disclosure, the air guiding device 100 is arranged so that the air conditioner indoor unit 1000 can blow uniform airflow into the room, and in the meanwhile the outlet air volume of the air conditioner indoor unit 1000 is large to ensure the temperature adjustment effect of the air conditioner indoor unit 1000.
An air-conditioning system according to an embodiment of the present disclosure is described as follows.
The air-conditioning system according to the embodiment of the present disclosure is provided with the above-mentioned air conditioner indoor unit 1000.
In the air-conditioning system according to the embodiment of the present disclosure, the air conditioner indoor unit 1000 is arranged so that the air-conditioning system can blow uniform airflow into the room, and in the meanwhile the outlet air volume of the air-conditioning system is large to ensure the temperature adjustment effect of the air-conditioning system.
In the description of the present disclosure, it is to be understood that the orientations or positional relationships, indicated by the terms “central”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “rear”, “left”, “right”, “inside”, “outside”, “axial”, “circumferential”, and the like, are based on the orientations or positional relationships shown in the drawings and are only for the purpose of facilitating and simplifying the description of the present disclosure, rather than indicating or implying that the described device or element must have a particular orientation or must be constructed and operated in a particular orientation, and therefore they cannot to be construed as limiting the present disclosure.
Moreover, the terms “first” and “second” are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defined by the term “first” or “second” may include one or more such features, either explicitly or implicitly. In the description of the present disclosure, the meaning of “a plurality of” refers to more than two, unless specifically defined otherwise.
In the present disclosure, unless otherwise stated and defined explicitly, the terms such as “install” “link”, “connect”, and “fix” should be understood in a broad sense; for example, a connection may be a fixed connection, a detachable connection, or an integrated connection; may be a mechanical connection or an electrical connection; and may be a direct connection, an indirect connection through an intermediate medium, or a communication inside two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood based on a specific situation.
In the description of the present specification, the description with reference to the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” and the like means specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can integrate and combine various embodiments or examples described in the present specification, as well as features of various embodiments or examples, without contradicting each other.
Although the embodiments of the present disclosure have been shown and described, it would be understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the present disclosure. Changes, modifications, substitutions and variations of the above-described embodiments may be made by those skilled in the art within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910472471.5 | May 2019 | CN | national |
| 201910472472.X | May 2019 | CN | national |
| 201920836116.7 | May 2019 | CN | national |
| 201920836120.3 | May 2019 | CN | national |
| 201910572692.X | Jun 2019 | CN | national |
| 201911036314.6 | Oct 2019 | CN | national |
| 201921837997.0 | Oct 2019 | CN | national |
The present application is a continuation application of PCT International Application No. PCT/CN2019/121702, filed on Nov. 28, 2019, which claims priority to and benefits of Chinese Patent Application Nos. 201910472471.5, 201920836116.7, 201910472472.X and 201920836120.3, filed on May 31, 2019; Chinese Patent Application Nos. 201921837997.0 and 201911036314.6, filed on Oct. 29, 2019; and Chinese Patent Application No. 201910572692.X, filed on Jun. 28, 2019, the entire contents of which are incorporated herein by reference for all purposes. No new matter has been introduced.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2019/121702 | Nov 2019 | US |
| Child | 17533420 | US |
