Volute structure for centrifugal fan, centrifugal fan and air conditioner

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a volute structure for a centrifugal fan, which comprises a volute plate, a plurality of volute blades and a plurality of volute blades, the first side plate is arranged on one side of the worm-shaped plate and is connected with the worm-shaped plate; the second side plate is arranged on the other side of the worm-shaped plate and is connected with the worm-shaped plate; the partition plate is arranged on the first side plate or the second side plate, and the partition plate is parallel to the worm-shaped plate and extends in the direction from the first side plate to the second side plate. According to the volute structure for the centrifugal fan, the partition plate parallel to the volute plate is arranged on the first side wall or the second side wall of the volute structure for the centrifugal fan, on one hand, the partition plate can play a role in scattering vortexes and reducing wind loss of the centrifugal fan, and on the other hand, the partition plate can prevent airflow blown out by an impeller from flowing to the rotating center of the back of the impeller; and the internal loss of the centrifugal fan is reduced, so that the air outlet volume of the centrifugal fan is increased. The utility model further discloses the centrifugal fan and an air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal fans, for example, to a volute structure for a centrifugal fan, a centrifugal fan and an air conditioner. Background Art

[0002] At present, the centrifugal fan is a kind of machine that relies on input mechanical energy to increase the gas pressure and discharge the gas. It belongs to the driven fluid machine. Centrifugal fans are widely used in the home appliance industry. The working principle of the centrifugal fan is to use the high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction to convert the kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes to the radial direction when passing through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction to cause deceleration, and this deceleration effect converts the kinetic energy into pressure energy.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] When the existing centrifugal fan discharges air, the air flow will inevitably generate vortexes with the inner wall of the volute, which will cause flow loss.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a volute structure for a centrifugal fan, a centrifugal fan and an air conditioner to solve the problem that when the existing centrifugal fan discharges air, the air flow will inevitably generate vortices with the inner wall of the volute, causing flow loss.

[0008] An embodiment of a first aspect of the present application provides a volute structure for a centrifugal fan, the volute structure for a centrifugal fan comprising: a volute plate;

[0009] A first side plate, disposed on one side of the volute plate and connected to the volute plate;

[0010] A second side plate, disposed on the other side of the volute plate and connected to the volute plate;

[0011] The partition is arranged on the first side plate or the second side plate, and is parallel to the volute plate and extends from the first side plate toward the second side plate.

[0012] In some optional embodiments, one of the first side plate and the second side plate is provided with an air inlet, and the partition plate is provided on the other one of the first side plate and the second side plate.

[0013] In some optional embodiments, an air outlet is formed between the two ends of the volute plate, and the partition includes: an arc segment, the center of the arc segment coincides with the center of the base circle of the volute plate, the arc segment is a major arc and an avoidance gap is provided corresponding to the air outlet; a straight line segment, which is a straight line, one end of which is connected to the arc segment, and the other end extends toward the air outlet.

[0014] In some optional embodiments, the radius R of the arc segment 隔 The relationship with the radius R of the volute structure is R 隔 =(0.6~0.7)R.

[0015] In some optional embodiments, the volute plate, the first side plate and the second side plate jointly enclose an air outlet cavity, the impeller of the centrifugal fan is suitable for being arranged in the air cavity, and the distance between the extended end of the partition and the wall surface of the impeller facing the partition ranges from 2 mm to 5 mm.

[0016] In some optional embodiments, the thickness dimension of the partition plate is the same as the thickness dimension of the scroll plate.

[0017] An embodiment of a second aspect of the present application provides a centrifugal fan, the centrifugal fan comprising a volute structure for a centrifugal fan as described in any one of the above optional embodiments.

[0018] In some optional embodiments, the centrifugal fan further comprises:

[0019] An impeller is rotatably disposed in the wind cavity;

[0020] The motor is arranged outside the volute structure of the centrifugal fan and is drivingly connected to the impeller to drive the impeller to rotate.

[0021] In some optional embodiments, the centrifugal fan further comprises:

[0022] The collector is arranged at the air inlet and connected to the volute structure of the centrifugal fan.

[0023] An embodiment of the third aspect of the present application provides an air conditioner, comprising a centrifugal fan as described in any one of the above optional embodiments.

[0024] The volute structure for a centrifugal fan, the centrifugal fan and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0025] When the existing centrifugal fan is working, as the impeller rotates, negative pressure is formed at the air inlet of the centrifugal fan, and the outside air flows into the volute from the air inlet. Under the action of the impeller, the flow direction changes, and flows from the middle of the impeller to the surroundings. The surroundings of the impeller correspond to the volute. The airflow will generate vortices under the obstruction of the volute, which will cause the centrifugal fan to generate wind loss and reduce the air output of the centrifugal fan. In this embodiment, a partition parallel to the volute plate is set on the first side wall or the second side wall of the volute structure for the centrifugal fan. On the one hand, the partition can break up the vortex and reduce the wind loss of the centrifugal fan. On the other hand, the partition can also block the airflow blown out by the impeller from flowing to the rotation center of the back of the impeller, reducing the internal loss of the centrifugal fan, thereby increasing the air output of the centrifugal fan. In addition, by arranging a volute plate, a first side plate and a second side plate, the volute plate, the first side plate and the second side plate together constitute a volute structure for a centrifugal fan. The volute plate, the first side plate and the second side plate can be processed and produced separately and then assembled into a volute structure for a centrifugal fan, which can effectively reduce the difficulty of producing the volute structure for a centrifugal fan.

[0026] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0028] Figure 1 is a structural schematic diagram of a volute structure for a centrifugal fan provided by an embodiment of the present disclosure;

[0029] Figure 2 is a cross-sectional schematic diagram of a volute structure for a centrifugal fan provided by an embodiment of the present disclosure;

[0030] Figure 3 is an exploded schematic diagram of a centrifugal fan provided by an embodiment of the present disclosure;

[0031] Figure 4 It is a cross-sectional schematic diagram of a partial structure of a centrifugal fan provided in an embodiment of the present disclosure.

[0032] Reference numerals:

[0033] 11: snail plate, 12: first side plate, 13: second side plate, 14: air inlet, 15: air outlet,

[0034] 20: partition, 21: arc segment, 22: straight segment,

[0035] 30: Impeller,

[0036] 40: Motor,

[0037] 50: Current collector. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0041] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] Unless otherwise stated, the term "plurality" means two or more.

[0043] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0044] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0046] Combination Figures 1 to 4 As shown, an embodiment of the present disclosure provides a volute structure for a centrifugal fan, and the volute structure for a centrifugal fan includes: a volute plate 11, a first side plate 12 and a second side plate 13, the first side plate 12 is arranged on one side of the volute plate 11, and the first side plate 12 is connected to the volute plate 11; the second side plate 13 is arranged on the other side of the volute plate 11, and the second side plate 13 is connected to the volute plate 11; the partition plate 20 is arranged on the first side plate 12 or the second side plate 13, the partition plate 20 is parallel to the volute plate 11, and the partition plate 20 extends along the direction of the first side plate 12 toward the second side plate 13.

[0047] With the disclosed embodiment, when the existing centrifugal fan is working, as the impeller 30 rotates, negative pressure is formed at the air inlet 14 of the centrifugal fan, and the outside air flows into the volute from the air inlet 14. Under the action of the impeller 30, the flow direction is changed, and it flows from the middle of the impeller 30 to the surroundings. The surroundings of the impeller 30 correspond to the volute. The airflow will generate vortices under the obstruction of the volute, which will cause the centrifugal fan to generate wind loss, thereby reducing the air output of the centrifugal fan. In this embodiment, a partition 20 parallel to the volute plate 11 is set on the first side wall or the second side wall of the volute structure for the centrifugal fan. On the one hand, the partition 20 can play a role in breaking up the vortex and reducing the wind loss of the centrifugal fan. On the other hand, the partition 20 can also block the airflow blown out by the impeller 30 from flowing to the rotation center of the back of the impeller 30, reducing the internal loss of the centrifugal fan, thereby increasing the air output of the centrifugal fan. The partition plate 20 is provided in parallel with the volute plate 11 and extends from the first side plate 12 toward the second side plate 13 , that is, the shape of the partition plate 20 is similar to that of the volute plate 11 .

[0048] In addition, by providing the volute plate 11, the first side plate 12 and the second side plate 13, the volute plate 11, the first side plate 12 and the second side plate 13 together constitute a volute structure for a centrifugal fan. The volute plate 11, the first side plate 12 and the second side plate 13 can be processed and produced separately and then assembled into a volute structure for a centrifugal fan, which can effectively reduce the production difficulty of the volute structure for a centrifugal fan.

[0049] Specifically, combined Figures 1 to 4 As shown in , in one embodiment, the first side plate 12 is provided with an air suction port, the number of the partition plate 20 is one and the partition plate 20 is disposed on the second side plate 13 .

[0050] In this way, the partition 20 can effectively block the airflow blown out by the impeller 30 from flowing to the rotation center at the back of the impeller 30, thereby reducing the internal loss of the centrifugal fan.

[0051] In another embodiment, the number of the partitions 20 is two, the first side plate 12 is provided with an air suction port, and the two partitions 20 are respectively disposed on the first side plate 12 and the second side plate 13 .

[0052] In this way, by setting two partitions 20, the two partitions 20 can respectively block the vortex generated at the connection between the volute plate 11 and the first side plate 12 and the vortex generated at the connection between the volute plate 11 and the second side plate 13, thereby further reducing the wind loss of the centrifugal fan.

[0053] It should be noted that the positions of the two partitions 20 respectively arranged on the first side plate 12 and the second side plate 13 may correspond to each other or may not correspond to each other, and the position of the partition 20 of the first side plate 12 can be flexibly adjusted according to the opening area of ​​the air intake port.

[0054] Optionally, the partition plate 20 and the first side plate 12 or the second side plate 13 are an integrated structure.

[0055] Thus, by adopting an integrated design of the partition plate 20 and the first side plate 12 or the second side plate 13, not only the number of components can be reduced, the production cost can be reduced, and the manufacturing process can be simplified, but also the installation and maintenance work can be made easier and faster. In addition, since the number of connecting parts is reduced, the integrated structure has higher stability and can better withstand vibration and stress during operation.

[0056] Specifically, the volute plate 11 includes a volute tongue section and a volute case section, a first end of the volute tongue section is connected to a first end of the volute case section, a second end of the volute tongue end is spaced apart from a second end of the volute case end, and an air outlet 15 is formed therebetween.

[0057] In this way, the air flow can flow out from the air outlet 15 under the guidance of the volute section, reducing wind loss and ensuring the air output of the centrifugal fan. By setting the volute tongue section, part of the gas can be prevented from circulating in the volute structure.

[0058] Optionally, one of the first side plate 12 and the second side plate 13 is provided with an air inlet 14 , and the partition plate 20 is provided on the other one of the first side plate 12 and the second side plate 13 .

[0059] By adopting the embodiment of the present disclosure, by arranging the partition 20 on the side panel without the air inlet 14, that is, the partition 20 is arranged opposite to the air inlet 14, the partition 20 can effectively block the air blown out by the impeller 30 from flowing back to the back of the impeller 30, thereby reducing the amount of airflow flowing back to the impeller 30 and then blown out from the impeller 30, thereby increasing the air output of the centrifugal fan.

[0060] Optionally, an air outlet 15 is formed between the two ends of the volute plate 11, and the partition 20 includes: an arc segment 21 and a straight segment 22, the center of the arc segment 21 coincides with the center of the base circle of the volute plate 11, the arc segment 21 is a major arc, and the arc segment 21 is provided with an avoidance gap corresponding to the air outlet 15; the straight segment 22 is a straight line, one end of the straight segment 22 is connected to the arc segment 21, and the other end of the straight segment 22 is extended toward the air outlet 15.

[0061] By adopting the embodiment of the present disclosure, by providing an avoidance gap in the arc segment 21, it is possible to prevent the partition 20 from blocking the airflow from being discharged toward the air outlet 15, thereby ensuring the normal air discharge of the centrifugal fan.

[0062] By setting the straight line segment 22, the airflow can be discharged toward the air outlet 15 under the guidance of the straight line segment 22, so that the airflow in the space between the partition 20 and the side plate where the partition 20 is located and the volute plate 11 can flow toward the air outlet 15 along the extension direction of the partition 20, thereby increasing the air output of the centrifugal fan.

[0063] Optionally, the radius R of the arc segment 21 is 隔 The relationship with the radius R of the volute structure is R 隔 =(0.6~0.7)R.

[0064] According to the embodiment of the present disclosure, the radius of the arc segment 21 is set to be between 0.6 and 0.7 times the radius of the volute structure. In this way, it is possible to avoid the situation where the partition 20 is too close to the volute plate 11, resulting in the partition 20 not being able to break up the vortex well, and it is also possible to avoid the situation where the partition 20 is too far from the volute plate 11, resulting in the partition 20 having a poor effect of breaking up the vortex.

[0065] Specifically, the radius of the arc segment 21 of the partition plate 20 may be 0.65 times the radius of the volute structure.

[0066] In this way, the partition 20 can ensure the effect of breaking up the vortex.

[0067] Optionally, combined Figure 4 As shown in FIG. 1 , the partition plate 20 is located between the outer edge surface of the impeller 30 and the volute plate 11 .

[0068] In this way, the collision between the partition plate 20 and the impeller 30 can be effectively avoided.

[0069] Optionally, a dimension of the partition plate 20 along the first side plate 12 toward the second side plate 13 is smaller than a distance between the impeller 30 and the side plate where the partition plate 20 is located.

[0070] In this way, by setting the dimension of the partition 20 along the first side plate 12 toward the second side plate 13 to be smaller than the distance between the impeller 30 and the side plate where the partition 20 is located, it is possible to avoid the extended end of the partition 20 colliding with the impeller 30. In addition, it is also possible to avoid the partition 20 blocking the impeller 30 from discharging air in a circumferential direction, thereby increasing the wind loss of the centrifugal fan.

[0071] Optionally, a dimension of the partition plate 20 along the first side plate 12 toward the second side plate 13 is greater than half of the distance between the impeller 30 and the side plate where the partition plate 20 is located.

[0072] In this way, by setting the dimension of the partition 20 along the first side plate 12 toward the second side plate 13 to be greater than half the distance between the impeller 30 and the side plate where the partition 20 is located, it can be avoided that the partition 20 cannot break up the vortex or has a poor effect in breaking up the vortex.

[0073] Preferably, the dimension of the partition plate 20 along the first side plate 12 toward the second side plate 13 is equal to two thirds of the distance between the impeller 30 and the side plate where the partition plate 20 is located.

[0074] In this way, it is possible to avoid the extended end of the partition 20 from colliding with the impeller 30 or blocking the impeller 30 from discharging air in a circumferential direction, and it is also possible to ensure that the partition 20 can effectively break up the vortex and increase the air output of the centrifugal fan.

[0075] Optionally, the volute plate 11, the first side plate 12 and the second side plate 13 jointly enclose an air outlet cavity, the impeller 30 of the centrifugal fan is suitable for being arranged in the air cavity, and the distance between the extended end of the partition 20 and the wall surface of the impeller 30 facing the partition 20 ranges from 2 mm to 5 mm.

[0076] According to the embodiment of the present disclosure, the volute plate 11, the first side plate 12 and the second side plate 13 jointly enclose the air outlet cavity, so that the volute structure for the centrifugal fan can better control the flow direction and speed of the gas, thereby improving the efficiency of the centrifugal fan. At the same time, the jointly enclosed air cavity can reduce gas leakage, reduce noise, and improve the reliability of the fan.

[0077] When the distance between the extended end of the partition 20 and the wall of the impeller 30 facing the partition 20 is greater than 5 mm, the partition 20 has a poor effect of breaking up the vortex, and it is difficult to achieve the effect of increasing the air output of the centrifugal fan. When the distance between the extended end of the partition 20 and the wall of the impeller 30 facing the partition 20 is less than 2 mm, on the one hand, there is a slight displacement of the impeller 30 during the rotation process, which may cause the impeller 30 to collide with the partition 20, and on the other hand, it will cause the airflow after the partition 20 breaks up to directly impact the impeller 30, increasing the noise of the centrifugal fan. By setting the distance between the extended end of the partition 20 and the wall of the impeller 30 facing the partition 20 between 2 mm and 5 mm, not only can the collision between the impeller 30 and the partition 20 be avoided, but also the direct impact between the airflow and the impeller 30 can be reduced, thereby reducing the noise level of the centrifugal fan.

[0078] Optionally, the thickness of the partition plate 20 is the same as the thickness of the scroll plate 11 .

[0079] According to the embodiment of the present disclosure, by setting the thickness of the partition 20 to be the same as the thickness of the volute plate 11, the partition 20 and the volute plate 11 have the same thickness, so that the overall structure is more coordinated and consistent, and the overall aesthetics of the volute structure is improved. Secondly, the use of the partition 20 and the volute plate 11 with the same thickness can simplify the production process and reduce manufacturing costs. In addition, since the partition 20 and the volute plate 11 have the same thickness, they can better withstand vibration and stress during operation, and improve the stability of the volute structure.

[0080] Specifically, the thickness of the partition 20 may be 2.5 mm.

[0081] An embodiment of the present disclosure provides a centrifugal fan, which includes a volute structure for a centrifugal fan as described in any one of the above optional embodiments.

[0082] The centrifugal fan using the embodiment of the present disclosure includes the volute structure for the centrifugal fan of any one of the above embodiments, and therefore has the beneficial effects of the volute structure for the centrifugal fan of any one of the above embodiments, which will not be described in detail here.

[0083] Optionally, the centrifugal fan further includes: an impeller 30 and a motor 40, wherein the impeller 30 is rotatably disposed in the wind cavity; the motor 40 is disposed outside the volute structure for the centrifugal fan, and the motor 40 is drivingly connected to the impeller 30 to drive the impeller 30 to rotate.

[0084] By implementing the present disclosure, an impeller 30 is provided and rotatably disposed in the wind cavity. The rotation of the impeller 30 can drive the outside air to flow into the wind cavity along the air inlet 14 and flow out of the wind cavity from the air outlet 15, thereby ensuring the normal operation of the fan.

[0085] By providing a motor 40 and drivingly connecting the motor 40 to the impeller 30, the motor 40 can drive the impeller 30 to rotate. The user can control the rotation of the impeller 30 by controlling the start and stop of the motor 40 and the speed and other parameters, thereby improving the convenience of user operation. By providing the motor 40 outside the volute structure for the centrifugal fan, the motor 40 can be prevented from occupying the internal space of the centrifugal fan. In addition, the motor 40 can be prevented from affecting the air intake of the centrifugal fan, thereby ensuring the air intake of the centrifugal fan.

[0086] Specifically, the motor 40 is connected to the impeller 30 via a coupling.

[0087] In this way, the coupling, as a connecting component between the motor 40 and the impeller 30, can ensure a stable connection between the two, reduce vibration and deviation, and improve the smoothness of operation.

[0088] Optionally, the centrifugal fan further includes: a collector 50, which is disposed at the air inlet 14 and connected to the volute structure.

[0089] By adopting the embodiment of the present disclosure, by providing a collector 50 and arranging the collector 50 at the air inlet 14 and connecting it to the volute structure, it is possible to ensure from the source that the centrifugal fan reaches the specified air volume or static pressure value and meets the indoor ventilation requirements. Secondly, the collector 50 can effectively reduce the air inlet resistance and horizontal wind speed of the centrifugal fan, and improve the efficiency and performance of the centrifugal fan. Through precise air volume control and air flow control, the wind noise of the centrifugal fan can be effectively reduced, and the impact of the noise of the centrifugal fan on the user can be reduced. In addition, the collector 50 can ensure that the airflow can be evenly distributed on the inlet section of the impeller 30, reach the speed value required by the inlet, and enter the impeller 30 with minimal airflow loss, thereby reducing the air volume loss of the centrifugal fan.

[0090] Optionally, the collector 50 includes a collector housing and a rectifier; wherein, an air inlet is provided on one side of the collector housing, and the air inlet is in a convergent shape. By setting the air inlet in a convergent shape, the gas can be concentrated and introduced into the collector housing; the collector housing is a circular pipe close to the impeller 30, where the gas converges; the rectifier is an adjustable guide blade fixed at the outlet end of the collector 50, and its function is to rectify the incoming gas so that it enters the impeller 30 at a uniform speed along a certain direction.

[0091] Thus, through the rectifying effect of the collector 50, the gas obtains a uniform velocity distribution before entering the impeller 30, thereby improving the efficiency of the fan. At the same time, the collector 50 can also reduce the noise and vibration of the centrifugal fan and improve the stability of the centrifugal fan.

[0092] An embodiment of the present disclosure provides an air conditioner, comprising a centrifugal fan as described in any one of the above optional embodiments.

[0093] The air conditioner using the embodiment of the present disclosure includes the centrifugal fan of any one of the above embodiments, and therefore has the beneficial effects of the centrifugal fan of any one of the above embodiments, which will not be described in detail here.

[0094] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A volute structure for a centrifugal fan, characterized in that: include: Snail plate; A first side plate, disposed on one side of the volute plate and connected to the volute plate; A second side plate, disposed on the other side of the volute plate and connected to the volute plate; The partition is arranged on the first side plate or the second side plate, and is parallel to the volute plate and extends from the first side plate toward the second side plate.

2. The volute structure for a centrifugal fan according to claim 1, characterized in that: One of the first side plate and the second side plate is provided with an air inlet, and the partition plate is arranged on the other of the first side plate and the second side plate.

3. The volute structure for a centrifugal fan according to claim 1, characterized in that: An air outlet is formed between the two ends of the snail plate, and the partition includes: The arc segment, the center of which coincides with the center of the base circle of the volute plate, is a superior arc and a relief gap is provided at the corresponding air outlet; The straight line segment is a straight line, one end of which is connected to the arc segment, and the other end of which is extended toward the air outlet.

4. The volute structure for a centrifugal fan according to claim 3, characterized in that: The radius of the arc segment R 隔 The relationship with the radius R of the volute structure is R 隔 =(0.6~0.7)R.

5. The volute structure for a centrifugal fan according to claim 1, characterized in that: The volute plate, the first side plate and the second side plate together enclose an air outlet cavity. The impeller of the centrifugal fan is suitable for being arranged in the air cavity. The distance between the extended end of the partition and the wall surface of the impeller facing the partition ranges from 2 mm to 5 mm.

6. The volute structure for a centrifugal fan according to claim 1, characterized in that: The thickness of the partition is the same as that of the volute plate.

7. A centrifugal fan, characterized in that: It comprises a volute structure for a centrifugal fan as claimed in any one of claims 1 to 6.

8. The centrifugal fan according to claim 7, characterized in that: Also includes: An impeller is rotatably disposed in the wind cavity; The motor is arranged outside the volute structure of the centrifugal fan and is drivingly connected to the impeller to drive the impeller to rotate.

9. The centrifugal fan according to claim 8, characterized in that: Also includes: The collector is arranged at the air inlet and connected to the volute structure of the centrifugal fan.

10. An air conditioner, characterized in that: Comprising the centrifugal fan as described in any one of claims 7 to 9.

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