阅读说明：本技术 离心风机的壳体、离心风机及干衣机 (Centrifugal fan shell, centrifugal fan and clothes dryer ) 是由 杨龙 李涛 邴进东 梁泉 朱冬冬 楚振嘉 于 2019-04-12 设计创作，主要内容包括：本发明属于风机技术领域,旨在解决现有离心风机的风道内易发生气流紊乱,从而影响离心风机工作效率的问题。为此,本发明提供了一种离心风机的壳体、离心风机及干衣机,壳体的风道内设置有分层结构,分层结构设置为能够将风道的至少一部分分隔为至少两个风层且靠近强风端的风层的宽度大于靠近弱风端的风层的宽度。通过在风道内设置分层结构,将风道分隔为至少两个风层,并且使靠近强风端的风层的宽度大于靠近弱风端的风层的宽度,即通过分层结构来调整弱风端风道的宽度,以使弱风端风道的宽度与弱风端的气流量相匹配,以避免出现风道内无法充满气流的情况发生,能够避免风道内发生气流紊乱的情况,能够避免影响离心风机的工作效率。(The invention belongs to the technical field of fans and aims to solve the problem that the working efficiency of a centrifugal fan is influenced because airflow disorder is easy to occur in an air duct of the conventional centrifugal fan. Therefore, the invention provides a shell of a centrifugal fan, the centrifugal fan and a clothes dryer, wherein a layered structure is arranged in an air duct of the shell, the layered structure is set to be capable of dividing at least one part of the air duct into at least two air layers, and the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end. Through set up layered structure in the wind channel, separate the wind channel for two at least wind layers, and make the width that is close to the wind layer of strong wind end be greater than the width that is close to the wind layer of weak wind end, adjust the width in weak wind end wind channel through layered structure promptly, so that the width in weak wind end wind channel matches with the gas flow phase-match of weak wind end, take place with the condition that can't be full of the air current in avoiding appearing the wind channel, can avoid taking place the turbulent condition of air current in the wind channel, can avoid influencing centrifugal fan's work efficiency.)

1. The shell of the centrifugal fan is characterized in that a layered structure is arranged in an air duct of the shell, and the layered structure is set to be capable of dividing at least one part of the air duct into at least two air layers, wherein the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end.

2. The housing of claim 1, wherein the layered structure is disposed proximate an outlet end of the air chute.

3. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, the layered table dividing the wind tunnel into a first wind layer and a second wind layer, wherein the first wind layer is proximate the strong wind end and the second wind layer is proximate the weak wind end.

4. The housing of claim 3, wherein the cross-sectional width of the tiered platform increases in a direction of gas flow toward the outlet end of the air chute.

5. The housing of claim 3 or 4, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.

6. The housing of claim 3 or 4, wherein the height of the stratification station decreases in a direction of gas flow towards the outlet end of the air duct.

7. The housing of claim 5, wherein the height of the tiered platforms is progressively lower in a direction of gas flow toward the outlet end of the air chute.

8. The housing of claim 3, wherein an inner side of the tiered platform is obliquely disposed relative to an inner wall of the housing.

9. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, the layered table comprising at least two steps to divide the air duct into at least three air layers.

10. The housing of claim 9, wherein each step of the tiered platform has a cross-sectional width that gradually increases in a direction of gas flow toward the outlet end of the air chute.

11. The housing of claim 9 or 10, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.

12. The housing of claim 9 or 10, wherein each step of the tiered platform has a height that gradually decreases in a direction of gas flow toward the outlet end of the air chute.

13. The housing of claim 11, wherein each step of the tiered platform has a height that gradually decreases in a direction of gas flow toward the outlet end of the air chute.

14. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, an inner side of the layered table extending obliquely from the inner wall of the housing to the bottom wall of the housing.

15. The housing of claim 14, wherein the cross-sectional width of the tiered platform increases in a direction of gas flow toward the outlet end of the air chute.

16. The housing of claim 14 or 15, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.

17. The housing of claim 14 or 15, wherein the height of the location where the stratification station intersects the inner wall of the housing is gradually lower in the direction of the gas flow towards the outlet end of the air duct.

18. The housing of claim 16, wherein the layering stage intersects the interior wall of the housing at a progressively lower height along the direction of gas flow to the outlet end of the air chute.

19. The housing according to any one of claims 1 to 4, 8 to 10, 14 to 15, wherein the layered structure is fixedly connected to or provided integrally with an inner wall of the housing.

20. The enclosure of claim 3, wherein the height of the tiered platforms is 1/2-3/4 of the height of the interior walls of the enclosure.

21. A centrifugal fan, characterized in that it comprises a casing according to any one of claims 1 to 20.

22. Laundry dryer, characterized in that it comprises a centrifugal fan according to claim 21.

Technical Field

The invention belongs to the technical field of fans, and particularly provides a shell of a centrifugal fan, the centrifugal fan and a clothes dryer.

Background

The centrifugal fan accelerates gas by using an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, and then decelerates and changes the flow direction so as to convert the kinetic energy into the potential energy (pressure). Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

Taking a clothes dryer as an example, a centrifugal fan is generally adopted as a fan on the existing clothes dryer, the centrifugal fan comprises a driving motor, a shell and an impeller arranged in the shell, the driving motor can drive the impeller to rotate at a high speed so as to accelerate air, the air enters from one end of the shell and flows to the other end, the air flow at the air inlet end of the shell is larger than that at the other end of the shell, the air flow at the air inlet end of the shell is a strong wind end due to large air flow, the air flow at the other end of the shell is a weak wind end due to small air flow, however, because the air duct width of the strong wind end in the shell is the same as that of the weak wind end, the air duct of the weak wind end with small air flow can not be filled with the air flow easily, and the part without the air flow can generate negative pressure to cause air flow disorder, thereby affecting the working efficiency of the centrifugal fan and further affecting the working efficiency of the clothes dryer.

Therefore, there is a need in the art for a new centrifugal fan housing and a corresponding centrifugal fan and dryer to solve the above problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely the problem that the working efficiency of the centrifugal fan is affected due to the fact that airflow disorder is prone to occur in an air duct of the existing centrifugal fan, the invention provides a shell of the centrifugal fan, wherein a layered structure is arranged in the air duct of the shell, at least one part of the air duct can be divided into at least two air layers, and the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end.

In a preferred embodiment of the above housing, the layered structure is disposed near an outlet end of the air duct.

In a preferred technical solution of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and the layered table divides the air duct into a first air layer and a second air layer, wherein the first air layer is close to the strong wind end, and the second air layer is close to the weak wind end.

In a preferred embodiment of the above casing, a cross-sectional width of the layering stage gradually increases along a direction in which the gas flows toward the outlet end of the air duct.

In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.

In a preferred embodiment of the above casing, the height of the layering stage gradually decreases along a direction in which the gas flows toward the outlet end of the air duct.

In a preferred embodiment of the above casing, the height of the layering stage gradually decreases along a direction in which the gas flows toward the outlet end of the air duct.

In a preferred embodiment of the above casing, an inner side surface of the layering stage is provided to be inclined with respect to an inner wall of the casing.

In a preferred embodiment of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and the layered table includes at least two steps so as to divide the air duct into at least three air layers.

In a preferred embodiment of the above casing, a cross-sectional width of each step of the layering stage gradually increases along a direction in which the gas flows toward an outlet end of the air duct.

In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.

In a preferred embodiment of the above casing, the height of each step of the layering stage gradually decreases along the direction of the gas flowing to the outlet end of the air duct.

In a preferred embodiment of the above casing, the height of each step of the layering stage gradually decreases along the direction of the gas flowing to the outlet end of the air duct.

In a preferred embodiment of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and an inner side surface of the layered table extends obliquely from the inner wall of the casing to a bottom wall of the casing.

In a preferred embodiment of the above casing, a cross-sectional width of the layering stage gradually increases along a direction in which the gas flows toward the outlet end of the air duct.

In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.

In a preferred embodiment of the above casing, a height of a position where the layering stage intersects with an inner wall of the casing is gradually reduced along a direction in which the gas flows toward an outlet end of the air duct.

In a preferred embodiment of the above casing, a height of a position where the layering stage intersects with an inner wall of the casing is gradually reduced along a direction in which the gas flows toward an outlet end of the air duct.

In a preferred embodiment of the above casing, the layered structure is fixedly connected to or integrated with an inner wall of the casing.

In the preferred embodiment of the above casing, the height of the layering stage is 1/2 to 3/4 of the height of the inner wall of the casing.

In another aspect, the invention also provides a centrifugal fan comprising the housing described above.

In another aspect, the present invention also provides a clothes dryer including the centrifugal fan described above.

The technical scheme includes that the air duct is divided into at least two air layers by the layered structure, the width of the air layer close to the strong air end is larger than that of the air layer close to the weak air end, namely, the width of the air duct at the weak air end is adjusted by the layered structure, so that the width of the air duct at the weak air end is matched with the air flow of the weak air end, the situation that the air duct cannot be filled with air flow is avoided, the situation that air flow is disordered in the air duct can be avoided, and the working efficiency of the centrifugal fan is further prevented from being influenced.

Further, the windward end of the layering platform is in smooth transition with the inner wall of the shell. By enabling the windward end to be in smooth transition with the inner wall of the shell, the airflow on the inner wall of the shell can be smoothly transited to the inner side surface of the layering platform.

In addition, the centrifugal fan further provided on the basis of the technical scheme of the invention has the technical effects of the shell due to the adoption of the shell, and compared with the centrifugal fan before improvement, the centrifugal fan hardly generates airflow disorder in the air duct, so that the working efficiency is greatly improved.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a centrifugal fan of the present invention;

FIG. 2 is a schematic structural diagram of a first embodiment of a centrifugal fan according to the present invention;

FIG. 3 is a schematic structural view of a second embodiment of the centrifugal fan of the present invention;

fig. 4 is a schematic structural view of a centrifugal fan according to a third embodiment of the present invention.

Detailed Description

First, it should be understood by those skilled in the art that the embodiments described below are merely for explaining technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms "front", "back", "upper", "middle", "lower", "top", "bottom", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The problem that the working efficiency of the centrifugal fan is affected due to airflow disorder easily occurs in an air duct of the existing centrifugal fan pointed out based on the background technology. The invention provides a shell of a centrifugal fan, the centrifugal fan and a clothes dryer, and aims to effectively avoid the condition of airflow disorder in an air duct of the centrifugal fan so as to avoid influencing the working efficiency of the centrifugal fan.

Specifically, as shown in fig. 1, the centrifugal fan of the present invention includes a casing 1, an impeller is disposed in the casing 1, a layered structure is disposed in an air duct of the casing 1, the layered structure is configured to divide at least a portion of the air duct into at least two air layers, and a width of the air layer near a strong wind end is greater than a width of the air layer near a weak wind end. Known from the background art, because gas gets into and upward flows from the bottom of casing 1, flow around after assaulting the impeller back plate, therefore, the airflow at casing 1 top is greater than the airflow of casing 1 bottom, the top of casing 1 is because the airflow is big, for the strong wind end, the bottom of casing 1 is because the airflow is little, for the weak wind end, because the wind channel width of strong wind end (being the top of casing 1) is the same with the wind channel width of weak wind end (being the bottom of casing 1) in casing 1, easily lead to the wind channel of the weak wind end that the airflow is little can not be full of the air current, the position that does not have the air current then can produce the negative pressure, cause the air current disorder, thereby influence centrifugal fan's work efficiency. Therefore, the layered structure is arranged in the air duct, the air duct is divided into at least two air layers through the layered structure, the width of the air layer close to the strong air end is larger than that of the air layer close to the weak air end, namely, the width of the air duct at the weak air end is adjusted through the layered structure, so that the width of the air duct at the weak air end is matched with the air flow at the weak air end, and the condition that the air duct cannot be filled with air flow can be avoided. Wherein, the layered structure and the inner wall of the housing 1 can be fixedly connected or integrated, and those skilled in the art can flexibly set the specific connection form of the layered structure and the inner wall of the housing 1 in practical application as long as the layered structure and the inner wall of the housing 1 can be fixedly connected. Furthermore, the layered structure may be disposed within the entire duct, or a segment of the duct, in a preferred case, the layered structure may be disposed near the outlet end 4 of the duct, etc., and such adjustments and changes to the specific disposition of the layered structure should be within the scope of the present invention without departing from the spirit and scope of the present invention. It should be noted that in the present application, the phrase "the layered structure is disposed near the outlet end of the air duct" includes both the case that the layered structure is disposed at the outlet end of the air duct and the case that the layered structure slightly extends towards the inside of the air duct, and the specific extension range may be different in different application scenarios, and in principle, the extension range of the layered structure extending inwards in the air flow direction should not exceed the center line of the impeller.

The technical solution of the present invention will be explained in detail below by taking the layered structure provided at the outlet end 4 of the air duct as an example.