Patent Application
20220196033
The present disclosure belongs to the technical field of fans, and specifically provides a housing of a centrifugal fan, a centrifugal fan and a clothing dryer.
In a centrifugal fan, according to the principle of converting kinetic energy into potential energy, a high-speed rotating impeller is used to accelerate gas, then decelerate it, change a flow direction thereof, and convert kinetic energy into potential energy (pressure). The centrifugal fans are widely used in ventilation, dust exhausting and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air introduction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selective delivery of grains; inflation and propulsion of air sources of wind tunnels and hovercrafts, etc.
Taking clothing dryers as an example, the fans on existing clothing dryers are generally centrifugal fans. The centrifugal fan includes a drive motor, a housing, and an impeller arranged in the housing. The drive motor can drive the impeller to rotate at a high speed to accelerate the gas. The gas enters from one end of the housing, flows toward the other end, and flows all around after impacting a rear disc of the impeller. Therefore, an air flow volume at an air inlet end of the housing is larger than an air flow volume at the other end of the housing. The air inlet end of the housing is a strong wind end due to the large air flow volume, and the other end of the housing is a weak wind end due to the small air flow volume. However, since a width of an air duct at the strong wind end in the housing is the same as a width of an air duct at the weak wind end, the following situation is likely to occur: it is impossible for the air duct at the weak wind end with a small air flow volume to be fully filled with air flow, and a negative pressure will be generated at the part without air flow, thus causing air flow turbulence, which affects a working efficiency of the centrifugal fan, and further affects a working efficiency of the clothing dryer.
Accordingly, there is a need in the art for a new housing of a centrifugal fan and a corresponding centrifugal fan and clothing dryer to solve the above problem.
In order to solve the above problem in the prior art, that is, to solve the problem that air flow turbulence is likely to occur in the air duct of the existing centrifugal fan, which would affect the working efficiency of the centrifugal fan, the present disclosure provides a housing of a centrifugal fan, in which an air duct of the housing is provided with a layering structure, the layering structure is arranged to be able to divide at least a part of the air duct into at least two wind layers, and a width of the wind layer close to a strong wind end is larger than a width of the wind layer close to a weak wind end.
In a preferred technical solution of the above housing, the layering structure is arranged close to an outlet end of the air duct.
In a preferred technical solution of the above housing, the layering structure is a layering platform attached to or formed on an inner wall of the housing, and the layering platform divides the air duct into a first wind layer and a second wind layer, in which the first wind layer is close to the strong wind end, and the second wind layer is close to the weak wind end.
In a preferred technical solution of the above housing, a cross-sectional width of the layering platform gradually increases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a windward end of the layering platform has a smooth transition with the inner wall of the housing.
In a preferred technical solution of the above housing, a height of the layering platform gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a height of the layering platform gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, an inner side face of the layering platform is arranged inclined with respect to the inner wall of the housing.
In a preferred technical solution of the above housing, the layering structure is a layering platform attached to or formed on an inner wall of the housing, and the layering platform includes at least two step portions so as to divide the air duct into at least three wind layers.
In a preferred technical solution of the above housing, a cross-sectional width of each of the step portions of the layering platform gradually increases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a windward end of the layering platform has a smooth transition with the inner wall of the housing.
In a preferred technical solution of the above housing, a height of each of the step portions of the layering platform gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a height of each of the step portions of the layering platform gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, the layering structure is a layering platform attached to or formed on an inner wall of the housing, and an inner side face of the layering platform extends obliquely from the inner wall of the housing to a bottom wall of the housing.
In a preferred technical solution of the above housing, a cross-sectional width of the layering platform gradually increases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a windward end of the layering platform has a smooth transition with the inner wall of the housing.
In a preferred technical solution of the above housing, a height of the position where the layering platform intersects with the inner wall of the housing gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, a height of the position where the layering platform intersects with the inner wall of the housing gradually decreases in a direction in which a gas flows toward an outlet end of the air duct.
In a preferred technical solution of the above housing, the layering structure is fixedly connected to or integrated with an inner wall of the housing.
In a preferred technical solution of the above housing, a height of the layering platform is ½ to ¾ of a height of the inner wall of the housing.
In another aspect, the present disclosure also provides a centrifugal fan, which includes the above housing.
In further another aspect, the present disclosure also provides a clothing dryer, which includes the above centrifugal fan.
It can be understood by those skilled in the art that in the preferred technical solutions of the present disclosure, by arranging a layering structure in the air duct, the air duct is divided into at least two wind layers by the layering structure, and the width of the wind layer close to the strong wind end is larger than the width of the wind layer close to the weak wind end, that is, the width of the air duct at the weak wind end is adjusted through the layering structure so that the width of the air duct at the weak wind end matches the air flow volume at the weak wind end to avoid a situation in which the air duct cannot be fully filled with air flow, thereby avoiding air flow turbulence in the air duct, and further avoiding affecting the working efficiency of the centrifugal fan.
Further, the windward end of the layering platform has a smooth transition with the inner wall of the housing. Through the smooth transition between the windward end and the inner wall of the housing, the air flow on the inner wall of the housing can smoothly transition to the inner side face of the layering platform.
In addition, the centrifugal fan further provided by the present disclosure on the basis of the above technical solutions further has the technical effects of the above housing since the above housing is used in the centrifugal fan. As compared with the centrifugal fan before the improvement, the air duct of the centrifugal fan of the present disclosure hardly has air flow turbulence, and its working efficiency is greatly improved.
Preferred embodiments of the present disclosure will be described below with reference to the accompanying drawings, in which:
First, it should be understood by those skilled in the art that the embodiments described below are only used to explain the technical principles of the present disclosure, and are not intended to limit the scope of protection of the present disclosure.
It should be noted that in the description of the present disclosure, terms indicating directional or positional relationships, such as “front”, “rear”, “upper”, “middle”, “lower”, “top”, “bottom”, “inner”, “outer” and the like, are based on the directional or positional relationships shown in the accompanying drawings. They are only used for ease of description, and do not indicate or imply that the device or element must have a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be considered as limitations to the present disclosure. In addition, terms “first” and “second” are merely used for description, and should not be construed as indicating or implying relative importance.
In addition, it should also be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, terms “install”, “arrange”, “connect” and “connection” should be understood in a broad sense; for example, the connection may be a fixed connection, or may also be a detachable connection, or an integral connection; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection implemented through an intermediate medium, or it may be an internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to specific situations.
Based on the problem pointed out in the “BACKGROUND OF THE INVENTION” that air flow turbulence is likely to occur in the air duct of the existing centrifugal fan, which would affect the working efficiency of the centrifugal fan, the present disclosure provides a housing of a centrifugal fan, a centrifugal fan and a clothing dryer, aiming at effectively avoiding air flow turbulence in the air duct of the centrifugal fan, and further avoiding affecting the working efficiency of the centrifugal fan.
Specifically, as shown in
Hereinafter, the technical solutions of the present disclosure will be described in detail by taking the layering structure provided at the outlet end 4 of the air duct as an example.
First Embodiment
In the following, the technical solution of the first embodiment of the present disclosure will be described with reference to
As shown in
Preferably, a cross-sectional width of the layering platform 3A gradually increases in a direction in which the gas flows toward the outlet end 4 of the air duct. Since the width of the air duct gradually increases in the direction in which the gas flows toward the outlet end 4 of the air duct, in order to ensure that the width of the second wind layer matches the air flow volume of the second wind layer, the cross-sectional width of the layering platform 3A (L shown in
Preferably, a windward end 3A1 of the layering platform 3A has a smooth transition with the inner wall 11 of the housing 1. By making the windward end 3A1 have a smooth transition with the inner wall 11 of the housing 1, the air flow on the inner wall 11 of the housing 1 can be smoothly transitioned to the inner side face 3A2 of the layering platform 3A.
Preferably, the height of the layering platform 3A gradually decreases in the direction in which the gas flows toward the outlet end 4 of the air duct. The height of the layering platform 3A refers to H in
Second Embodiment
The technical solution of the second embodiment of the present disclosure will be described below with reference to
As shown in
Preferably, as shown in
Preferably, a windward end of the layering platform 3B has a smooth transition with the inner wall 11 of the housing 1. That is, a windward end 3B11 of the first step portion 3B1 has a smooth transition with the inner wall 11 of the housing 1. By making the windward end 3B11 of the first step portion 3B1 have a smooth transition with the inner wall 11 of the housing 1, the air flow on the inner wall 11 of the housing 1 can be smoothly transitioned to an inner side face 3B12 of the first step portion 3B1. Similarly, a windward end 3B21 of the second step portion 3B2 has a smooth transition with the inner wall 11 of the housing 1. By making the windward end 3B21 of the second step portion 3B2 have a smooth transition with the inner wall 11 of the housing 1, the air flow on the inner wall 11 of the housing 1 can be smoothly transitioned to an inner side face 3B22 of the second step portion 3B2.
Preferably, the height of each of the step portions of the layering platform 3B gradually decreases in the direction in which the gas flows toward the outlet end 4 of the air duct. The height of the first step portion 3B1 refers to H1 in
Third Embodiment
In the following, the technical solution of the third embodiment of the present disclosure will be described with reference to
As shown in
Preferably, as shown in
Preferably, as shown in
Preferably, as shown in
Finally, the present disclosure also provides a clothing dryer, which includes the centrifugal fan of the first embodiment, the second embodiment, or the third embodiment.
Hitherto, the technical solutions of the present disclosure have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection of the present disclosure is obviously not limited to these specific embodiments. Without departing from the principles of the present disclosure, those skilled in the art can make equivalent changes or replacements to relevant technical features, and all the technical solutions after these changes or replacements will fall within the scope of protection of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910295495.8 | Apr 2019 | CN | national |
| 201910296045.0 | Apr 2019 | CN | national |
| 201910296046.5 | Apr 2019 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/083765 | 4/8/2020 | WO | 00 |
