Fan and electrical equipment

Abstract

The utility model provides a fan and electrical equipment wherein the fan comprises: a first housing, which is provided with a ventilation opening and is internally provided with a motor mounting cavity; the second shell is connected with the first shell, and the interior of the first shell communicates with the interior of the second shell through a ventilation opening; the impeller is arranged in the first shell; the first diffuser is arranged in the first shell, the first diffuser comprises a plurality of first flow guide channels, and the multiple first flow guide channels are arranged around the impeller; the second diffuser is arranged in the first shell, the second diffuser comprises a second flow guide channel, and the second flow guide channel communicates with the motor mounting cavity; the motor structure is arranged in the motor mounting cavity; the rotating shaft is arranged on the motor structure and is connected with the impeller; the first flow guide channel is communicated with the ventilation opening and the second flow guide channel.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan and electrical equipment. Background Art

[0002] A fan is a machine that relies on mechanical energy to increase gas pressure and discharge gas. It is widely used in household appliances. At present, the industry usually increases the speed to obtain high vacuum and strong suction. However, the fan motor has poor heat dissipation, which affects the power of the motor, and the heat will cause the efficiency of the motor to decrease. Utility Model Content

[0003] The utility model aims to at least solve or improve the technical problem of poor heat dissipation effect of the motor structure of the fan in the prior art.

[0004] To this end, a first aspect of the utility model provides a fan.

[0005] A second aspect of the utility model provides an electrical device.

[0006] In view of this, according to the first aspect of the utility model, the utility model proposes a fan, comprising: a first shell, a vent is provided on the first shell, and a motor mounting cavity is provided inside the first shell; a second shell is connected to the first shell, and the interior of the first shell and the interior of the second shell are connected through the vent; an impeller is arranged inside the first shell; a first diffuser is arranged inside the first shell, the first diffuser includes a plurality of first flow guide channels, and the plurality of first flow guide channels are arranged around the impeller; a second diffuser is arranged inside the first shell, the second diffuser includes a second flow guide channel, and the second flow guide channel is connected to the motor mounting cavity; a motor structure is arranged in the motor mounting cavity; a rotating shaft is arranged in the motor structure and connected to the impeller; wherein the first flow guide channel is connected to the vent and the second flow guide channel.

[0007] The fan proposed by the utility model includes: a first shell, a second shell, a first diffuser, a second diffuser, an impeller, a motor structure and a rotating shaft. The first shell is provided with a vent, the interior of the first shell is provided with a motor mounting cavity, the motor structure is arranged in the motor mounting cavity, the first diffuser and the second diffuser are arranged in the interior of the first shell, and the first diffuser is arranged on the side of the motor structure away from the second diffuser, the first diffuser is provided with a first guide channel, the second diffuser is provided with a second guide channel, the first guide channel is connected with the vent and the second guide channel, the second guide channel is also connected with the motor mounting cavity, the vent is also connected with the interior of the second shell, the rotating shaft is arranged on the motor structure, the motor structure can drive the rotating shaft to rotate, the rotating shaft is connected with the impeller, and a plurality of first guide channels are arranged around the impeller.

[0008] The motor structure can drive the rotating shaft to rotate, and the rotating shaft drives the impeller to rotate, thereby generating airflow. The airflow is discharged through the first guide channel located on the periphery of the impeller. Then, part of the airflow enters the interior of the second shell through the air vent and is finally discharged. The other part of the airflow enters the motor mounting cavity through the second guide channel, thereby cooling the motor structure, thereby improving the heat dissipation effect of the motor structure, improving the efficiency of the motor structure, and improving the exhaust effect of the fan.

[0009] Furthermore, the double diffusion performed by the first diffuser and the second diffuser can increase the velocity of the airflow and improve the heat dissipation effect.

[0010] In addition, the fan in the above technical solution provided by the utility model may also have the following additional technical features:

[0011] In some embodiments, optionally, the first diffuser and the second diffuser are an integrated structure.

[0012] In this embodiment, the first diffuser and the second diffuser are an integrated structure. The integrated first diffuser and the second diffuser can avoid a fitting gap between the first diffuser and the second diffuser, avoid airflow leakage, and improve the exhaust and heat dissipation effects of the fan.

[0013] In some embodiments, optionally, the first diffuser includes: a partition, which is arranged inside the first shell, and the edge of the partition is spaced apart from the first shell; a plurality of first blades, which are arranged on the side of the partition away from the motor structure, and a first guide channel is formed between adjacent first blades; the second diffuser includes: a plurality of second blades, which are arranged on the side of the partition away from the first blades, and a second guide channel is formed between adjacent second blades.

[0014] In this embodiment, the first diffuser includes a partition and a plurality of first blades. The first partition is arranged inside the first shell, and the edge of the partition is spaced apart from the shell to facilitate the airflow into the second guide channel. The plurality of first blades are arranged on the side of the partition away from the motor structure. The plurality of first blades are arranged around the impeller, and the rotating shaft passes through the partition.

[0015] The second diffuser includes a plurality of second blades, and the plurality of second blades are disposed on a side of the partition facing the motor structure.

[0016] Wherein, a first guide channel is formed between adjacent first blades, and a second guide channel is formed between adjacent second blades.

[0017] Furthermore, the first blade and the second blade are respectively arranged on both sides of the partition, so that the first diffuser and the second diffuser are more compact and the volumes of the first diffuser and the second diffuser are reduced.

[0018] In some embodiments, optionally, the number of the first blades is the same as the number of the second blades, and one end of the first blade facing away from the rotating shaft is aligned with one end of the second blade facing away from the rotating shaft.

[0019] In this embodiment, the number of first blades is the same as the number of second blades, a first blade corresponds to a second blade, and an end of a first blade facing away from the rotating shaft is aligned with an end of a second blade facing away from the rotating shaft, so that the first guide channel and the second guide channel correspond one to one, that is, an outlet of a first guide channel and an inlet of a second guide channel are aligned, and then part of the airflow can directly enter the second guide channel after being discharged through the first guide channel, thereby reducing the consumption of airflow and improving the heat dissipation effect of the motor structure.

[0020] In some embodiments, optionally, the first shell includes: a first main body; a second main body located on one side of the first main body, the motor mounting cavity is arranged in the second main body, and a vent is formed between the first main body and the second main body; wherein the second shell is connected to the first main body and the second main body.

[0021] In this embodiment, the first shell includes a first main body and a second main body, the first main body and the second main body are separated, and an annular vent is formed at a position spaced apart between the first main body and the second main body, corresponding to a plurality of first guide channels, thereby increasing the exhaust volume of the fan, and the second shell is connected to the first main body and the second main body, so that the first shell and the second shell form a whole, and the structure is simple and easy to produce.

[0022] In some embodiments, optionally, the second body includes: a barrel portion, a motor mounting cavity is disposed in the barrel portion; a first edge is disposed on the barrel portion, and the second diffuser and the first edge are abutted against each other; a second edge is disposed on a side of the first edge away from the barrel portion, a vent is formed between the second edge and the first body, and the second shell is connected to the second edge.

[0023] In this embodiment, the main shell includes a barrel portion, a first edge and a second edge. The first edge is arranged on the barrel portion, and the second diffuser and the first edge are abutted against each other, so that the motor mounting cavity is only connected to the first guide channel through the second guide channel, thereby increasing the wind pressure of the airflow entering the motor mounting cavity and improving the heat dissipation effect on the motor structure.

[0024] In addition, the second edge is arranged on the side of the first edge away from the barrel portion, and a vent is formed between the second edge and the first body, that is, the second edge and the first body are spaced apart to form a vent, and the second shell is connected to the second edge and the first body, so that the first shell and the second shell form a whole. The structure is simple and easy to produce.

[0025] In some embodiments, optionally, the first guide channel and the second guide channel are distributed in a cross manner.

[0026] In this embodiment, the first guide channel and the second guide channel are cross-distributed, so that the guide directions of the first guide channel and the second guide channel are roughly the same, thereby making it easier for airflow to pass through the second guide channel and improving the heat dissipation effect on the motor structure.

[0027] In some embodiments, optionally, the second shell is a volute, the second shell is arranged around the first shell, and the first guide channel and the vent are opposite to each other.

[0028] In this embodiment, the second shell is a volute, so that the airflow entering the interior of the second shell can be secondary pressurized, thereby improving the efficiency of the fan, and the second shell is arranged around the first shell to increase the air output of the fan, and the first guide channel and the vent are opposite to each other, which can reduce the loss of airflow when flowing between the first guide channel and the vent, thereby improving the efficiency of the fan.

[0029] In some embodiments, optionally, the first diffuser is a radial diffuser; and the second diffuser is a radial diffuser.

[0030] In this embodiment, the first diffuser is a radial diffuser, and the second diffuser is a radial diffuser, thereby reducing the axial height of the first diffuser and the second diffuser along the rotating shaft and reducing the volume of the first diffuser and the second diffuser.

[0031] According to a second aspect of the utility model, the utility model provides an electrical device, including: a fan as provided in the embodiment of the first aspect.

[0032] The electrical equipment proposed in the utility model includes the fan proposed in the first embodiment, and therefore has all the beneficial effects of the fan proposed in the first embodiment, which will not be described one by one here.

[0033] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 A schematic diagram of the structure of a fan provided by an embodiment of the utility model is shown;

[0036] Figure 2 A cross-sectional view of a fan provided by an embodiment of the utility model is shown;

[0037] Figure 3 A cross-sectional view of a fan provided by an embodiment of the utility model is shown;

[0038] Figure 4 A schematic diagram showing the structure of a first diffuser and a second diffuser in a fan provided by an embodiment of the utility model is shown;

[0039] Figure 5 A schematic structural diagram of a first diffuser and a second diffuser in a fan provided by an embodiment of the utility model is shown.

[0040] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0041] 100 fan, 110 first shell, 112 vent, 114 motor mounting cavity, 116 first main body, 118 second main body, 120 barrel, 122 first edge, 124 second edge, 126 second shell, 130 first diffuser, 132 partition, 134 first blade, 136 first guide channel, 140 impeller, 150 motor structure, 160 rotating shaft, 170 second diffuser, 172 second blade, 174 second guide channel. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] Refer to the following Figures 1 to 5 To describe the fan 100 provided according to some embodiments of the present invention. Figure 3 The arrows in the figure indicate the direction of air flow.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, according to the first aspect of the utility model, the utility model proposes a fan 100, which includes: a first shell 110, a second shell 126, a first diffuser 130, a second diffuser 170, an impeller 140, a motor structure 150 and a rotating shaft 160.

[0046] The first shell 110 is provided with a vent 112, and a motor installation cavity 114 is provided inside the first shell 110. The motor structure 150 is provided in the motor installation cavity 114. The second shell 126 is connected to the first shell 110. The interior of the first shell 110 and the interior of the second shell 126 are connected through the vent 112. After the airflow enters the interior of the second shell 126, it can be discharged to realize the air outlet of the fan 100. The first diffuser 130 and the second diffuser 170 are both arranged inside the first shell 110. The first diffuser 130 is provided with a first guide channel 136, and the second diffuser 170 is provided with a second guide channel 174. The first guide channel 136 and the second guide channel 174 are connected. The first guide channel 136 is also connected to the interior of the second shell 126 through the vent 112, and the second guide channel 174 is also connected to the motor installation cavity 114. The rotating shaft 160 is arranged on the motor structure 150, and the impeller 140 is arranged on the rotating shaft 160.

[0047] The motor structure 150 can drive the rotating shaft 160 to rotate, and the rotating shaft 160 can drive the impeller 140 to rotate, thereby generating airflow. The airflow is discharged through the first guide channel 136, part of the airflow enters the interior of the second shell 126 through the vent, and the other part of the airflow enters the motor mounting cavity 114 through the second guide channel 174.

[0048] The fan 100 proposed in the utility model includes: a first housing 110, a second housing 126, a first diffuser 130, a second diffuser 170, an impeller 140, a motor structure 150 and a rotating shaft 160, the first housing 110 is provided with a vent 112, the interior of the first housing 110 is provided with a motor installation cavity 114, the motor structure 150 is arranged in the motor installation cavity 114, the first diffuser 130 and the second diffuser 170 are arranged in the interior of the first housing 110, and the first diffuser 130 is arranged at the motor structure 150 away from the second diffuser 170. On one side, the first diffuser 130 is provided with a first guide channel 136, and the second diffuser 170 is provided with a second guide channel 174. The first guide channel 136 is connected with the vent 112 and the second guide channel 174. The second guide channel 174 is also connected with the motor mounting cavity 114. The vent 112 is also connected with the interior of the second shell 126. The rotating shaft 160 is arranged on the motor structure 150. The motor structure 150 can drive the rotating shaft 160 to rotate. The rotating shaft 160 is connected to the impeller 140. Multiple first guide channels 136 are arranged around the impeller 140.

[0049] The motor structure 150 can drive the rotating shaft 160 to rotate, and the rotating shaft 160 drives the impeller 140 to rotate, thereby generating airflow. The airflow is discharged through the first guide channel 136 located on the side of the impeller 140, and then a part of the airflow enters the interior of the second shell 126 through the air vent and is finally discharged, and the other part of the airflow enters the motor mounting cavity 114 through the second guide channel 174, thereby cooling the motor structure 150, thereby improving the heat dissipation effect of the motor structure 150, improving the efficiency of the motor structure 150, and improving the exhaust effect of the fan 100.

[0050] Furthermore, the double diffusion performed by the first diffuser 130 and the second diffuser 170 can increase the velocity of the airflow and improve the heat dissipation effect.

[0051] That is, the impeller 140 drives the airflow to pass through the first diffuser 130 for primary diffusion, part of the airflow enters the boost chamber for secondary boosting, and the other part passes through the second diffuser 170 for secondary boosting, thereby making the fan 100 have the characteristics of high vacuum, strong suction, high efficiency and low noise.

[0052] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, optionally, the first diffuser 130 and the second diffuser 170 are an integrated structure.

[0053] In this embodiment, the first diffuser 130 and the second diffuser 170 are an integrated structure. The integrated first diffuser 130 and the second diffuser 170 can avoid the fitting gap between the first diffuser 130 and the second diffuser 170, avoid airflow leakage, and improve the exhaust effect and heat dissipation effect of the fan 100.

[0054] Specifically, the first diffuser 130 and the second diffuser 170 may be formed by injection molding, thereby reducing production costs and improving production efficiency.

[0055] like Figure 4 and Figure 5 As shown, in some embodiments, optionally, the first diffuser 130 includes: a partition 132, which is arranged inside the first shell 110, and the edge of the partition 132 is spaced apart from the first shell 110; a plurality of first blades 134, which are arranged on the side of the partition 132 away from the motor structure 150, and a first guide channel 136 is formed between adjacent first blades 134; the second diffuser 170 includes: a plurality of second blades 172, which are arranged on the side of the partition 132 away from the first blades 134, and a second guide channel 174 is formed between adjacent second blades 172.

[0056] In this embodiment, the first diffuser 130 includes a partition 132 and a plurality of first blades 134. The first partition 132 is disposed inside the first shell 110, and the edge of the partition 132 is spaced apart from the shell to facilitate the airflow into the second guide channel 174. The plurality of first blades 134 are disposed on a side of the partition 132 away from the motor structure 150. The plurality of first blades 134 are disposed around the impeller 140, and the rotating shaft 160 passes through the partition 132.

[0057] The second diffuser 170 includes a plurality of second blades 172 , which are disposed on a side of the partition plate 132 facing the motor structure 150 .

[0058] A first guide channel 136 is formed between adjacent first blades 134 , and a second guide channel 174 is formed between adjacent second blades 172 .

[0059] Furthermore, the first blade 134 and the second blade 172 are respectively disposed on both sides of the partition 132 , so that the first diffuser 130 and the second diffuser 170 are more compact and the volumes of the first diffuser 130 and the second diffuser 170 are reduced.

[0060] Optionally, a plurality of first blades 134 are distributed on the partition 132 in a centrally symmetrical formation, wherein the first blades 134 may be a straight plate-like structure or a curved plate-like structure.

[0061] A plurality of second blades 172 are distributed on the partition plate 132 in a centrally symmetrical formation, wherein the second blades 172 may be a straight plate-like structure or a curved plate-like structure.

[0062] like Figure 4 and Figure 5 As shown, in some embodiments, optionally, the number of the first blades 134 is the same as the number of the second blades 172 , and one end of the first blade 134 away from the rotating shaft 160 is aligned with one end of the second blade 172 away from the rotating shaft 160 .

[0063] In this embodiment, the number of first blades 134 and the number of second blades 172 are the same, one first blade 134 corresponds to one second blade 172, and one end of a first blade 134 facing away from the rotating shaft 160 is aligned with one end of a second blade 172 facing away from the rotating shaft 160, so that the first guide channel 136 and the second guide channel 174 correspond one to one, that is, an outlet of a first guide channel 136 and an inlet of a second guide channel 174 are aligned, and then part of the airflow can directly enter the second guide channel 174 after being discharged through the first guide channel 136, thereby reducing the consumption of airflow and improving the heat dissipation effect of the motor structure 150.

[0064] That is, one end of a first blade 134 facing away from the rotation shaft 160 and one end of a second blade 172 facing away from the rotation shaft 160 are located at opposite sides of the same position of the partition plate 132 .

[0065] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, the first shell 110 includes: a first main body 116; a second main body 118, which is located on one side of the first main body 116, and the motor mounting cavity 114 is arranged on the second main body 118, and a vent 112 is formed between the first main body 116 and the second main body 118; wherein the second shell 126 is connected to the first main body 116 and the second main body 118.

[0066] In this embodiment, the first shell 110 includes a first main body 116 and a second main body 118, and the first main body 116 and the second main body 118 are separated, and an annular vent 112 is formed at a position spaced apart between the first main body 116 and the second main body 118, corresponding to a plurality of first guide channels 136, thereby increasing the exhaust volume of the fan 100, and the second shell 126 is connected to the first main body 116 and the second main body 118, so that the first shell 110 and the second shell 126 form a whole, and the structure is simple and easy to produce.

[0067] like Figure 2 and Figure 3 As shown, in some embodiments, optionally, the second main body 118 includes: a barrel portion 120, a motor mounting cavity 114 is disposed on the barrel portion 120; a first edge 122 is disposed on the barrel portion 120, and the second diffuser 170 and the first edge 122 are abutted against each other; a second edge 124 is disposed on the side of the first edge 122 away from the barrel portion 120, a vent 112 is formed between the second edge 124 and the first main body 116, and a second shell 126 is connected to the second edge 124.

[0068] In this embodiment, the main shell includes a barrel portion 120, a first edge 122 and a second edge 124. The first edge 122 is arranged on the barrel portion 120, and the second diffuser 170 and the first edge 122 are abutted against each other, so that the motor mounting cavity 114 is connected to the first guide channel 136 only through the second guide channel 174, thereby increasing the wind pressure of the airflow entering the motor mounting cavity 114 and improving the heat dissipation effect on the motor structure 150.

[0069] In addition, the second edge 124 is arranged on the side of the first edge 122 away from the barrel portion 120, and a vent 112 is formed between the second edge 124 and the first main body 116. That is, the second edge 124 and the first main body 116 are spaced apart to form the vent 112. The second shell 126 is connected to the second edge 124 and the first main body 116, so that the first shell 110 and the second shell 126 form a whole. The structure is simple and easy to produce.

[0070] Optionally, the barrel portion 120 includes air holes, and the airflow entering the motor installation cavity 114 can be discharged through the air holes, thereby improving the heat dissipation effect on the motor structure 150 .

[0071] The barrel portion 120 and the second edge 124 are both columnar, the first edge 122 is a diameter changer for connecting the barrel portion 120 and the second edge 124 , the barrel portion 120 and the second edge 124 can both be cylindrical, and the diameter of the second edge 124 is greater than the diameter of the barrel portion 120 .

[0072] In some embodiments, optionally, the first guide channel 136 and the second guide channel 174 are arranged to cross each other.

[0073] In this embodiment, the first guide channel 136 and the second guide channel 174 are cross-distributed, so that the guide directions of the first guide channel 136 and the second guide channel 174 are roughly the same, thereby making it easier for airflow to pass through the second guide channel 174 and improving the heat dissipation effect on the motor structure 150.

[0074] like Figure 5 As shown, dotted line A represents the distribution of a first guide channel 136, and dotted line B represents the distribution of a second guide channel 174. Dotted line A and dotted line B intersect, so that the guide directions of the first guide channel 136 and the second guide channel 174 are roughly the same.

[0075] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, the second shell 126 is a volute, the second shell 126 is disposed around the first shell 110, and the first guide channel 136 and the vent 112 are opposite to each other.

[0076] In this embodiment, the second shell 126 is a volute, so that the airflow entering the interior of the second shell 126 can be secondary pressurized, thereby improving the efficiency of the fan 100 and reducing noise. In addition, the second shell 126 is arranged around the first shell 110 to improve the air output of the fan 100. In addition, the first guide channel 136 and the vent 112 are opposite to each other, which can reduce the loss of airflow when flowing between the first guide channel 136 and the vent 112, thereby improving the efficiency of the fan 100.

[0077] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, optionally, the first diffuser 130 is a radial diffuser; and the second diffuser 170 is a radial diffuser.

[0078] In this embodiment, the first diffuser 130 is a radial diffuser, and the second diffuser 170 is a radial diffuser, thereby reducing the axial height of the first diffuser 130 and the second diffuser 170 along the rotating shaft 160 and reducing the volume of the first diffuser 130 and the second diffuser 170.

[0079] The fan 100 provided by the present invention includes components such as an impeller 140 , a first diffuser 130 , a second diffuser 170 , a first housing 110 , a second housing 126 , a motor structure 150 , and a rotating shaft 160 . After the gas is compressed and works by the impeller 140, it enters the first diffuser 130 through the return flow device, expands and pressurizes in the first diffuser 130, and then is split. One part enters the interior of the second shell 126 for further diffusion, and the other part enters the second diffuser 170. Part of the airflow entering the interior of the second shell 126 is further expanded and pressurized and discharged to the outside. The first diffuser 130 and the impeller 140 are arranged inside the first shell 110 to ensure that the overall size of the fan 100 and the impeller 140 do not change much, while having higher efficiency. At the same time, the second shell 126 plays a role in noise reduction. After entering the second diffuser 170, part of the airflow is further pressurized and flows to the motor structure 150, which cools the motor structure 150 and improves the efficiency of the motor, thereby ensuring the structural reliability of the fan 100 and improving the vacuum, suction and efficiency of the fan 100.

[0080] According to a second aspect of the utility model, the utility model provides an electrical device, including: a fan 100 provided in the embodiment of the first aspect.

[0081] The electrical equipment provided by the utility model includes the fan 100 provided in the first aspect embodiment, and therefore has all the beneficial effects of the fan 100 provided in the first aspect embodiment, which will not be described one by one here.

[0082] Specifically, electrical appliances include range hoods, fans, air conditioners, vacuum cleaners, etc.

[0083] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0084] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or units referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0085] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fan, characterized in that: include: A first shell, wherein a vent is provided on the first shell, and a motor installation cavity is provided inside the first shell; a second shell connected to the first shell, wherein the interior of the first shell and the interior of the second shell are connected through the vent; an impeller, disposed inside the first housing; A first diffuser, disposed inside the first housing, the first diffuser comprising a plurality of first flow guide channels, the plurality of first flow guide channels being disposed around the impeller; A second diffuser is disposed inside the first housing, the second diffuser comprises a second flow guide channel, and the second flow guide channel is connected to the motor installation cavity; A motor structure, arranged in the motor installation cavity; A rotating shaft, disposed on the motor structure and connected to the impeller; Wherein, the first guide channel is connected with the vent and the second guide channel.

2. The fan according to claim 1, characterized in that: The first diffuser and the second diffuser are an integrated structure.

3. The fan according to claim 2, characterized in that: The first diffuser comprises: A partition plate is arranged inside the first shell, and an edge of the partition plate is spaced from the first shell; A plurality of first blades are arranged on a side of the partition away from the motor structure, and the first guide channel is formed between adjacent first blades; The second diffuser comprises: A plurality of second blades are arranged on a side of the partition away from the first blades, and the second guide channel is formed between adjacent second blades.

4. The fan according to claim 3, characterized in that: The number of the first blades is the same as the number of the second blades, and one end of the first blade facing away from the rotating shaft is aligned with one end of the second blade facing away from the rotating shaft.

5. The fan according to any one of claims 1 to 4, characterized in that: The first housing comprises: First subject; A second body, located at one side of the first body, the motor installation cavity is arranged in the second body, and the vent is formed between the first body and the second body; Wherein, the second shell is connected to the first body and the second body.

6. The fan according to claim 5, characterized in that: The second entity includes: a barrel portion, wherein the motor mounting cavity is disposed in the barrel portion; a first edge, disposed on the barrel portion, wherein the second diffuser abuts against the first edge; The second edge is arranged on a side of the first edge away from the barrel portion, the vent is formed between the second edge and the first body, and the second shell is connected to the second edge.

7. The fan according to any one of claims 1 to 4, characterized in that: The first flow guiding channel and the second flow guiding channel are distributed in a cross manner.

8. The fan according to any one of claims 1 to 4, characterized in that: The second shell is a volute, and the second shell is arranged around the first shell. The first guide channel and the vent are opposite to each other.

9. The fan according to any one of claims 1 to 4, characterized in that: The first diffuser is a radial diffuser; The second diffuser is a radial diffuser.

10. An electrical device, characterized in that: include: A fan as claimed in any one of claims 1 to 9.

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