CN112392761B

CN112392761B - Centrifugal fan and air conditioning device

Info

Publication number: CN112392761B
Application number: CN201910749082.2A
Authority: CN
Inventors: 张玲玲; 宋汶泉
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2023-02-17
Anticipated expiration: 2039-08-14
Also published as: CN112392761A

Abstract

The application relates to a centrifugal fan, include: the volute comprises an air channel cover plate arranged opposite to the leeward side of the impeller of the centrifugal fan, and the air channel cover plate is provided with an opening; and the motor is arranged between the air duct cover plate and the impeller, extends into the opening and is configured to drive the impeller to rotate. This application is through extending to the motor in the opening, and when centrifugal fan's impeller rotated, the negative pressure effect made partial air current flow to centrifugal fan's leeward side, absorbed the heat of motor and in time taken away when the opening was flowed through to the air current to make the motor can in time dispel the heat, promoted the radiating effect of centrifugal fan to the motor. The application also discloses an air conditioning device.

Description

Centrifugal fan and air conditioning device

Technical Field

The present application relates to the field of fan technology, for example, centrifugal fans and air conditioning devices.

Background

Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling; ventilating and air inducing of boilers and industrial kilns; the field of cooling and ventilation in air conditioning units and household appliances. Some centrifugal fans have a motor disposed inside a volute, and in order to dissipate heat of the motor, heat dissipation holes are usually formed in the volute. In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: the radiating effect of the radiating hole to the motor is limited, and the motor cannot be radiated in time.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a centrifugal fan and an air conditioning device, and aims to solve the technical problems that the radiating effect of a radiating hole of the centrifugal fan on a motor is limited, and the motor cannot be timely cooled.

In some embodiments, a centrifugal fan comprises: the volute comprises an air channel cover plate arranged opposite to the leeward side of the impeller of the centrifugal fan, and the air channel cover plate is provided with an opening; and the motor is arranged between the air duct cover plate and the impeller, extends into the opening and is configured to drive the impeller to rotate.

In some embodiments, the air conditioning device comprises the centrifugal fan provided in the previous embodiments.

The centrifugal fan and the air conditioning device provided by the embodiment of the disclosure can realize the following technical effects: in the motor extended to the opening, when centrifugal fan's impeller rotated, the negative pressure effect made partial air current flow to centrifugal fan's leeward side, absorbed the heat of motor and in time taken away when the air current flowed through the opening to make the motor can in time dispel the heat, promoted centrifugal fan to the radiating effect of motor.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is an exploded view of a centrifugal fan provided by an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a centrifugal fan provided in the embodiment of the present disclosure.

Reference numerals are as follows:

1. a volute; 10. an air duct cover plate; 11. an opening; 2. an impeller; 3. an air flow channel; 4. a wind guide channel; 40. a frame; 41. a partition plate; 5. a motor; 6. a cover body.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

Fig. 1 is an exploded view of a centrifugal fan provided in an embodiment of the present disclosure. As shown in fig. 1, an embodiment of the present disclosure provides a centrifugal fan, including: the volute 1 comprises an air duct cover plate 10 arranged opposite to the leeward side of the impeller 2 of the centrifugal fan, and the air duct cover plate 10 is provided with an opening 11; and the motor 5 is arranged between the air duct cover plate 10 and the impeller 2, extends into the opening 11, and is configured to drive the impeller 2 to rotate.

The leeward side of the impeller 2 is the side opposite to the air inlet side of the impeller 2, when the impeller 2 rotates, air flow mainly enters from the air inlet side of the impeller 2 and flows out through a volute air outlet channel in the volute 1, and part of the air flow flows to the leeward side of the impeller 2. The motor 5 is connected with the rotating shaft of the impeller 2 and is used for driving the impeller 2 to rotate. Alternatively, the motor 5 is fixed to the duct cover 10. Thus, the duct cover 10 serves to fix and support the motor 5, and provides a supporting force for the motor 5. The motor 5 is arranged between the air duct cover plate 10 and the impeller 2, and the influence on the air inlet of the centrifugal fan is avoided. The air duct cover plate 10 is provided with an opening 11, and the motor 5 extends to the opening 11, so that heat dissipation of the motor 5 is facilitated. Optionally, the motor 5 extends outside the opening 11. Thus, the motor 5 can be sufficiently contacted with the outside air, and the heat dissipation is accelerated. Optionally, a partial region of the electric machine 5 is inserted into the opening 11. In this way, the motor 5 can also be brought into contact with the outside air, thereby accelerating heat dissipation. Optionally, the motor 5 extends to the inside of the opening 11. In this way, the opening 11 can also dissipate heat from the motor 5. Alternatively, the motor 5 is cylindrical and the opening 11 is circular. In this way, the motor 5 is adapted to the shape of the opening 11, which is beneficial for the heat dissipation of the motor 5. Optionally, the air duct cover 10 is provided with radial air guide strips around the opening 11. When the airflow flows from the periphery of the volute 1 to the leeward side of the impeller 2 and approaches the opening 11, the radial guide strips can guide the airflow direction and help the airflow to flow to the opening 11.

Fig. 2 is a schematic structural diagram of a centrifugal fan provided in the embodiment of the present disclosure. As shown in fig. 1 and 2, in some embodiments, an airflow channel 3 is formed between the motor 5 and the opening 11. The air channel 3 enables the inside of the volute 1 to be communicated with the outside, so that when the impeller 2 rotates, partial air can be introduced from the air channel 3 by negative pressure formed near the impeller 2, the air flows through the air channel 3 and is in contact with the motor 5 to absorb heat generated by the motor 5, and then the heat flows out of the air outlet channel of the volute 1 along with the rotation of the impeller 2, so that the motor 5 can dissipate heat quickly. Alternatively, the motor 5 is cylindrical, the opening 11 is circular, and the cross section of the airflow channel 3 formed by the motor 5 and the opening 11 is annular. Like this, be favorable to motor 5's periphery and air current fully to be contacted, promote the radiating effect.

In some embodiments, the centrifugal fan further comprises: and the air guide channel 4 is arranged on the periphery of the volute 1 so as to guide the airflow formed by the periphery of the volute 1 to the opening 11. When the impeller 2 rotates, air at the periphery of the volute 1 partially flows to the air inlet side of the impeller 2 and partially flows to the lee side of the impeller 2. When the air on the periphery of the volute 1 flows to the leeward side of the impeller 2, the flow direction is relatively random, the consistency of the air flow direction is enhanced by arranging the air guide channel 4, the air flow can flow to the opening 11 along the uniform direction, and the air flow can be favorably introduced into the opening 11.

In some embodiments, the air guiding passage 4 includes: and the frame 40 is arranged on the outer wall of the volute 1 and encloses a passage for the air flow to pass through. The frame 40 and the outer wall of the volute 1 form a passage for the airflow to pass through, so that the airflow has a relatively consistent direction when flowing. Optionally, the frame 40 is plate-shaped. In this way, a passage can be enclosed with the outer wall of the volute 1. In some embodiments, the air guiding channel 4 further includes: the partition plate 41 is provided inside the air guide duct 4 to partition the air guide duct 4 into a plurality of passages. The partition plate 41 partitions the air guide passage 4 into a plurality of passages, so that the formed air flow can easily flow in a certain direction, and particularly, when the diameter of the air guide passage 4 is large, the air flow is divided into a plurality of passages and flows along the respective passages, which is favorable for smoothly guiding the air flow into the opening 11.

In some embodiments, an angular space is formed between the volute periphery of the volute casing 1 and the circumscribed rectangle thereof, and the air guiding channel 4 is disposed in the angular space. The periphery of the volute 1 is in a volute shape, the volute shape serves as a base to serve as an external rectangle, a corner space is formed between the external rectangle and the volute shape, the air guide channel 4 is arranged in the corner space, the air flow formed by the corner space can be guided into the opening 11, and the overall structure of the centrifugal fan can be more compact. Alternatively, the air guide passage 4 is provided in a corner space on the opposite side of the air outlet passage of the scroll casing 1. Like this, make whole centrifugal fan's structural configuration comparatively compact, occupation space is reasonable, makes centrifugal fan easily set up in electrical apparatus, reduces the probability of interfering with other parts in the electrical apparatus, and centrifugal fan self's structure is firm more stable. Optionally, the number of the wind guide channels 4 is two, and the wind guide channels are respectively located in two corner spaces on the opposite side of the wind outlet channel of the volute casing 1. This makes it possible, on the one hand, to make the centrifugal fan more compact in its structural layout and, on the other hand, to introduce the air flows in the two corner spaces into the openings 11. Optionally, the frame 40 of the wind guiding channel 4 forms a frame with right angle at the periphery of the scroll casing 1. Like this, can make centrifugal fan pass through frame 40 and be fixed in the electrical apparatus, make centrifugal fan more firm stable.

In some embodiments, the air guide passage 4 extends in a direction parallel to the axial direction of the impeller 2. After being formed, the airflow firstly flows to the leeward side of the impeller 2 along a path parallel to the axial direction of the impeller 2, and then leaves the air guide channel 4 and flows to the opening 11 along the radial direction of the volute 1.

In some embodiments, the centrifugal fan further comprises: the cover 6 covers the outer side of the air duct cover plate 10, and a connection space for connecting the opening 11 and the air guide channel 4 is formed between the cover and the air duct cover plate 10. The air guide channel 4 guides the air flow to the opening 11, when the air flow flows out from the air guide channel 4, the air flow can be dispersed, partial air flow is dissipated outside and cannot flow to the opening 11, in order to enable the air flow to flow into the opening 11 as far as possible, a cover body 6 is arranged on the outer side of the air duct cover plate 10, the cover body 6 covers the opening 11, and a connecting space is formed between the cover body 6 and the air duct cover plate 10 to connect the opening 11 and the air guide channel 4. Thus, the airflow flows from the air guide channel 4 to the leeward side of the impeller 2, enters the connecting space when flowing out of the air guide channel 4, flows to the opening 11 through the connecting space, effectively avoids the dissipation of the airflow, and guides the generated airflow into the opening 11 as much as possible so as to fully exert the heat dissipation effect on the motor 5. Optionally, the cover 6 covers the opening 11 and the outlet of the air guiding channel 4. Therefore, the airflow is prevented from flowing to the outside from the outlet of the air guide channel 4, and the dissipation of the airflow is effectively reduced. Alternatively, the cover 6 is plate-shaped. After flowing out from the outlet of the air guide passage 4, the airflow can be blocked by the plate-shaped cover 6 and then flows toward the opening 11.

The embodiment of the disclosure also provides an air conditioning device, which comprises the centrifugal fan provided by any one of the embodiments. The air conditioning device is provided with the centrifugal fan, and the heat dissipation effect of the motor 5 of the centrifugal fan is good, so that the air conditioning device can be prevented from running mistakenly due to the fact that the centrifugal fan breaks down due to overheating, and the air conditioning device can run more stably.

In some embodiments, the air conditioning device further comprises: the condenser is arranged opposite to the air inlet side of the centrifugal fan. The condenser has lower temperature and is used for cooling the refrigerant. Centrifugal fan sets up with the condenser relatively, can make the air temperature around the centrifugal fan lower to the messenger inhales opening 11's air temperature and is lower, and is better to the heat absorption effect of motor 5, thereby has promoted the radiating effect to motor 5. Optionally, the air inlet of the centrifugal fan is arranged close to the condenser. In this way, the heat dissipation of the motor 5 is more facilitated.

It should be understood that the air conditioning device may be an air conditioner, or may be a dehumidifier. The air conditioner or the dehumidifier can adopt a centrifugal fan to supply air, and the centrifugal fan can be arranged close to a condenser of the air conditioner or the dehumidifier. Because the motor 5 of the centrifugal fan can radiate heat in time, the centrifugal fan can be prevented from being broken down, and the influence on the normal operation of the air conditioner or the dehumidifier is avoided.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, provided that all occurrences of the first element are renamed consistently and all occurrences of the second element are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, and/or components, but do not preclude the presence or addition of one or more other features, integers, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a" \8230; "does not exclude the presence of additional like elements in a process, method or apparatus comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

The terms "inner", "outer", and the like, herein indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, and communication between two elements, and may include direct connection and indirect connection through intervening media, where the meaning of the terms is to be understood by those skilled in the art as appropriate. Herein, the term "plurality" means two or more, unless otherwise specified.

Claims

1. A centrifugal fan, comprising:

the volute comprises an air channel cover plate which is arranged opposite to the leeward side of the impeller of the centrifugal fan, and the air channel cover plate is provided with an opening;

a motor disposed between the air duct cover and the impeller and extending into the opening, configured to drive the impeller to rotate, the air duct cover being used to fix and support the motor;

the air duct cover plate is provided with radial guide strips around the opening, the air flows flow from the periphery of the volute to the leeward side of the impeller, and when the air flow is close to the opening, the radial guide strips can guide the direction of the air flow and help the air flow to the opening;

an airflow channel is formed between the motor and the opening; the periphery of the volute is in a volute shape, the volute is used as a base to form an external rectangle, a corner space is formed between the external rectangle and the volute, airflow formed by the corner space can be guided into the opening, and the overall structure of the centrifugal fan can be more compact.

2. The centrifugal fan as claimed in claim 1, wherein the air guide passage comprises:

and the frame is arranged on the outer wall of the volute and encloses a passage for the air flow to pass through.

3. The centrifugal fan as claimed in claim 2, wherein the air guide passage further comprises:

and a partition plate provided inside the air guide passage to partition the air guide passage into a plurality of passages.

4. The centrifugal fan as claimed in claim 1, wherein the air guide passage extends in a direction parallel to an axial direction of the impeller.

5. The centrifugal fan of claim 1, further comprising:

the cover body covers the outer side of the air duct cover plate, and a connecting space for connecting the opening and the air guide channel is formed between the cover body and the air duct cover plate.

6. An air conditioning device, characterized by comprising a centrifugal fan according to any one of claims 1 to 5.

7. The air conditioning device according to claim 6, characterized by further comprising:

and the condenser is arranged opposite to the air inlet side of the centrifugal fan.