A pump

Abstract

The application provides a pump, comprising a shell, a motor assembly, an impeller and a circuit board; wherein the shell has a first cavity and a second cavity arranged at intervals inside; the motor assembly comprises a stator, a rotor and a rotating shaft, at least part of the rotor and at least part of the rotating shaft are located in the first cavity, the rotor is sleeved on the rotating shaft, and the stator is arranged outside the rotor; at least part of the impeller is located in the first cavity and connected to one end of the rotating shaft; the circuit board is located in the second cavity; a wall of the shell is provided with a first air cooling flow channel, the first air cooling flow channel is located outside the stator, and the first air cooling flow channel is communicated with the second cavity; the wall of the shell is provided with a first opening and a second opening, the first opening is communicated with the first air cooling flow channel, the second opening is communicated with the second cavity, one of the first opening and the second opening is an air inlet, and the other is an air outlet. The application can simultaneously cool the circuit board and the stator by arranging only one cooling passage.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, and more particularly to automotive thermal management systems, and especially to a pump. Background Technology

[0002] In related technologies, a pump includes a rotor, shaft, stator, impeller, and circuit board. During operation, the circuit board sends control signals to the stator, causing it to generate an alternating magnetic field, which in turn rotates the rotor. The rotor then drives the shaft and impeller to rotate, and the rotating impeller transports media such as water. During operation, the various components within the pump generate heat. If this heat cannot be dissipated in time, it can affect the service life of the components and even cause electrical hazards. The stator and circuit board (including various electronic components) are two components in the pump that are prone to heat generation. In one related technology, a single cooling path cannot simultaneously cover the cooling effect on both the stator and the circuit board, while setting multiple cooling paths complicates the pump's structure. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a pump that solves at least one of the problems in the prior art.

[0004] The embodiments of this application are implemented as follows:

[0005] A pump includes a housing, a motor assembly, an impeller, and a circuit board. The housing has a first cavity and a second cavity spaced apart. The motor assembly includes a stator, a rotor, and a shaft. At least a portion of the rotor and at least a portion of the shaft are located in the first cavity, with the rotor sleeved on the shaft and the stator surrounding the outside of the rotor. At least a portion of the impeller is located in the first cavity and connected to one end of the shaft. The circuit board is located in the second cavity. The wall of the housing has a first air-cooling channel located outside the stator and communicating with the second cavity. The wall of the housing also has a first opening and a second opening, the first opening communicating with the first air-cooling channel and the second opening communicating with the second cavity. One of the first and second openings is an air inlet, and the other is an air outlet.

[0006] In this application, a first air-cooling channel is provided on the outside of the stator. The first air-cooling channel is connected to the second cavity where the circuit board is located. There is a first opening connected to the first air-cooling channel and a second opening connected to the second cavity. The first opening, the first air-cooling channel, the second cavity, and the second opening form a cooling path. As the gas flows along the cooling path, it can directly contact the circuit board in the second cavity, carrying away the heat generated by the electronic components on the circuit board, thus providing a good cooling effect on the circuit board. At the same time, since the first air-cooling channel is located on the outside of the stator, the gas can also absorb the heat of the stator in the first cooling channel, thus also providing a certain cooling effect on the stator. Therefore, the cooling path formed by the first opening, the first air-cooling channel, the second cavity, and the second opening can simultaneously cool the circuit board and the stator. Attached Figure Description

[0007] Figure 1 A schematic cross-sectional view of the pump shown in this application. Figure 1 ;

[0008] Figure 2 A schematic cross-sectional view of the pump shown in this application. Figure 2 ;

[0009] Figure 3 A schematic cross-sectional view of the pump shown in this application. Figure 3 ;

[0010] Figure 4 A schematic cross-sectional view of the pump shown in this application. Figure 4 ;

[0011] Figure 5 A schematic cross-sectional view of the pump shown in this application. Figure 5 ;

[0012] Figure 6 A schematic cross-sectional view of the pump shown in this application. Figure 6 ;

[0013] Figure 7 A schematic cross-sectional view of the pump shown in this application. Figure 7 ;

[0014] Figure 8 A schematic cross-sectional view of the pump shown in this application. Figure 8 ;

[0015] Figure 9 A schematic cross-sectional view of the pump shown in this application. Figure 9 ;

[0016] Figure 10 This is a schematic diagram of the explosion of the pump shown in this application.

[0017] Figure label:

[0018] 1-Pump; 10-Casing; 11-First Housing; 12-Second Housing; 13-Third Housing; 20-Motor Assembly; 30-Impeller; 40-Circuit Board; 50-First Air-Cooling Channel; 51-First Port; 60-First Through-hole; 70-Second Through-hole; 80-Fan; 91-First Liquid-Cooling Channel; 92-Second Liquid-Cooling Channel; 110-First Chamber; 120-Second Chamber; 121-First Chamber Wall; 122-Second Chamber Wall; 130-First Wall; 131-Second Air-Cooling Channel; 132-Third Through-hole; 140-Inlet; 150-Outlet; 160-Third Chamber; 210-Rotor; 220-Shaft; 221-Fourth Through-hole; 222-Helical Groove; 223-Helical Blade; 224-Bearing; 230-Stator; 1201-First Sub-Housing; 1202-Second Sub-Housing. Detailed Implementation

[0019] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0020] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium.

[0022] The pump 1 of the exemplary embodiment of this application will now be described in detail with reference to the accompanying drawings.

[0023] Example 1:

[0024] like Figure 1As shown, this application provides a pump 1, including a housing 10, a motor assembly 20, an impeller 30, and a circuit board 40; the housing 10 has a first cavity 110 and a second cavity 120 spaced apart inside; the motor assembly 20 includes a stator 230, a rotor 210, and a shaft 220, at least a portion of the rotor 210 and at least a portion of the shaft 220 are located in the first cavity 110, the rotor 210 is sleeved on the shaft 220, and the stator 230 surrounds the outside of the rotor 210; at least a portion of the impeller 30 is located in the first cavity 110. It is connected to one end of the rotating shaft 220; the circuit board 40 is located in the second cavity 120; the wall of the outer shell 10 is provided with a first air-cooling channel 50, which is located on the outside of the stator 230 and is connected to the second cavity 120; the wall of the outer shell 10 is provided with a first opening 60 and a second opening 70, which are connected to the first air-cooling channel 50 and the second opening 70 are connected to the second cavity 120. One of the first opening 60 and the second opening 70 is an air inlet and the other is an air outlet.

[0025] The pump 1 of this application is used for fluid transportation, particularly for automotive thermal management systems, to transport coolant and other fluids within the vehicle. During the transportation process, the stator 230 and circuit board 40 of the pump 1, along with other components, easily generate heat. Since the pump 1 is relatively small when used in a vehicle, and the environment inside the vehicle is not conducive to heat dissipation, this application improves the pump 1 to achieve excellent heat dissipation. Furthermore, the first port 60, the first air-cooling channel 50, the second cavity 120, and the second port 70 form a cooling passage that can simultaneously cool the circuit board 40 and the stator 230. A single cooling passage can simultaneously cool and dissipate heat from both the stator 230 and the circuit board 40, contributing to the simplification and miniaturization of the pump 1's structure. "Single cooling passage" refers to the interconnectedness of all channels within the cooling passage, not to a single cooling channel.

[0026] When the first port 60 is an air inlet and the second port 70 is an air outlet, outside air enters the first air-cooling channel 50 through the first port 60, flows through the first air-cooling channel 50 into the second cavity 120, and exits from the second port 70. When the first port 60 is an air outlet and the second port 70 is an air inlet, outside air enters the second cavity 120 through the second port 70, flows through the second cavity 120 into the first air-cooling channel 50, and exits from the first port 60. During the air flow, the air can directly contact the circuit board 40 within the second cavity 120, carrying away the heat generated by the electronic components on the circuit board 40, thus providing a good cooling effect on the circuit board 40. In addition, the air flow can also absorb heat from the stator 230 within the first air-cooling channel 50, providing a certain cooling effect on the stator 230 as well. In this way, both the circuit board 40 and the stator 230 can be cooled simultaneously.

[0027] Optional, such as Figure 1 As shown, a fan 80 can also be set to make the air flow continuously at a faster speed, thereby improving the cooling effect on the circuit board 40.

[0028] Optionally, the fan 80 can be located outside the pump 1. Alternatively, the fan 80 can be located inside the first air-cooling channel 50. Alternatively, the fan 80 can be located inside the second chamber 120, thereby improving the structural compactness of the pump 1 and facilitating the miniaturization of the pump 1.

[0029] Optionally, the fan 80 can also be set at the first port 60 and / or the second port 70; in this case, when the port is an air inlet, a suction type fan 80 is selected and set at the corresponding port, and when the port is an air outlet, an exhaust type fan 80 is selected and set at the corresponding port; wherein, only one of the first port 60 and the second port 70 can be equipped with a fan 80, or both the first port 60 and the second port 70 can be equipped with the corresponding type of fan 80, so that the gas can flow at a faster speed.

[0030] Optionally, when the fan 80 is located at the second port 70, it can also be located within the second cavity 120.

[0031] Optionally, the number of first air-cooling channels 50 can be at least two, and the at least two first air-cooling channels 50 are arranged at intervals along the circumference of the stator 230; the number of first ports 60 is also at least two, the first ports 60 are located on the side wall of the housing 10, and the at least two first ports 60 are arranged at intervals along the circumference of the stator 230, and the first ports 60 are connected to the first air-cooling channels 50 one by one; or, at least two first ports 60 are connected to one first air-cooling channel 50.

[0032] Optionally, there is one first air-cooled channel, and the first air-cooled channel 50 is arranged around the stator 230. In this case, the first port 60 is located on the side wall of the housing 10, and the first air-cooled channel 50 is connected to at least one first port 60.

[0033] When at least two first air-cooling channels 50 are arranged at intervals along the circumference of the stator 230, or when the first air-cooling channels 50 are arranged around the stator 230, the gas in the first air-cooling channels 50 can surround the stator 230, absorb the heat of each area of ​​the stator 230, and improve the cooling effect of the stator 230.

[0034] Example 2:

[0035] like Figure 2As shown, in this embodiment, the number of second ports 70 can be at least two, and the at least two second ports 70 are spaced apart around the central axis L of the rotating shaft 220. Each second port 70 is provided with a fan 80, and all second ports 70 can be either air inlets or air outlets. The number of first air-cooling channels 50 is at least two, and the at least two first air-cooling channels 50 are spaced apart along the circumference of the stator 230.

[0036] The second cavity 120 includes a first cavity wall 121 and a second cavity wall 122, which are arranged opposite to each other along the axial direction of the rotating shaft 220. The first air-cooling channel 50 has a first port 51 communicating with the second cavity 120. The first port 51 is disposed on the first cavity wall 121, and the second port 70 is disposed on the second cavity wall 122. The first air-cooling channel 50 and the second port 70 correspond one-to-one. Along the axial direction of the rotating shaft 220, each second port 70 is arranged opposite to the first port 51 of the corresponding first air-cooling channel 50. That is to say, the number of first air-cooling channels 50 and second ports 70 is equal at this time.

[0037] like Figure 2 The diagram illustrates a scenario where two second ports 70 and two first air-cooling channels 50 are provided. The two second ports 70 and the two first air-cooling channels 50 are symmetrically arranged relative to the stator 230. The first port 51 of each first air-cooling channel 50 is opposite to the corresponding second port 70. A fan 80 is installed at each of the two second ports 70. It can be seen that, in this configuration, the first port 51 of each first air-cooling channel 50 is opposite to one of the second ports 70, and is 180° rotationally symmetrical with respect to the other second port 70 relative to the shaft 220, i.e., diagonally opposite to the other second port 70 relative to the second cavity 120.

[0038] like Figure 2 As indicated by the arrow, during cooling, the gas enters the second cavity 120 through one of the first air-cooling channels 50 and is discharged from the opposite second port 70, as well as from the second ports 70 arranged diagonally. When the gas flows in the above manner, it can contact the circuit board 40 to cool the circuit board 40, resulting in a better cooling effect.

[0039] As can be seen, the cooling effect on the circuit board 40 is better in this embodiment. Furthermore, in this embodiment, at least two second ports 70 and first air-cooling channels 50 are provided. A fan 80 is provided at each second port 70, and each second port 70 is arranged opposite to the first port 51 of the corresponding first air-cooling channel 50. This arrangement allows gas to enter the second cavity 120 quickly and in large quantities, and to be discharged from the second cavity 120 quickly, thus removing the heat from the stator 230 and circuit board 40 more quickly and improving the cooling efficiency of the circuit board 40 and stator 230.

[0040] Optionally, in this embodiment, there may be only one first air-cooling channel 50, which surrounds the stator 230.

[0041] Optionally, regardless of whether the first air-cooling channel 50 is provided as one or at least two, the projection of the first port 51 of the first air-cooling channel 50 on the second cavity wall 122 is located around the projection of the circuit board 40 on the second cavity wall 122; the projection of the second port 70 on the second cavity wall 122 is also located around the circuit board 40.

[0042] Optionally, when there are at least two first air-cooling channels 50 and two second ports 70, the number of first air-cooling channels 50 and second ports 70 may not be equal. The number of first air-cooling channels 50 may be greater than or less than the number of second ports 70. In this case, the first port 51 and the second port of the first air-cooling channel 50 are not one-to-one correspondences and are not set in a relative manner.

[0043] Optionally, in this embodiment, the circuit board 40 may be parallel to the first cavity wall 121 and the second cavity wall 122.

[0044] Example 3:

[0045] like Figure 3 As shown, the difference from the above embodiment 2 is that in this embodiment, at least two second ports 70 are provided, but only one second port 70 is provided with a fan 80, and all second ports 70 are air outlets, and the fan 80 is a suction type fan 80.

[0046] like Figure 3 As shown by the arrow, when the fan 80 is running, the outside air enters the first air-cooling channel 50 through the first port 60, and then enters the second cavity 120 through the first air-cooling channel 50. After entering the second cavity 120, all the air entering the second cavity 120 will gather towards the fan 80 and be discharged through the second port 70 where the fan 80 is located. During the gathering process, the air will flow through the circuit board 40, make full contact with the circuit board 40, and carry away the heat of the circuit board 40, resulting in a good cooling effect on the circuit board 40.

[0047] Optionally, in this embodiment, fans 80 may also be provided at some of the second ports 70. For example, if there are three second ports 70, fans 80 may be provided at two of the second ports 70.

[0048] Example 4:

[0049] like Figure 4As shown, the difference from Embodiment 3 above is that in this embodiment, only one second port 70 is provided. The second port 70 is located on the second cavity wall 122, and a fan 80 is provided at the second port 70. Simultaneously, when at least two first air-cooling channels 50 are provided, the second port 70 can be positioned opposite to the first port 51 of one of the first air-cooling channels 50; or, the second port 70 can not be positioned opposite to the first port 51 of any of the first air-cooling channels 50. When configured in this manner, a good cooling effect on the circuit board 40 can also be achieved.

[0050] Optionally, in this embodiment, when there is one second port 70, the second port 70 can be located on the side of the circuit board 40 projected on the second cavity wall 122, or the second port 70 can be covered by the projection of the circuit board 40 on the second cavity wall 122.

[0051] Example 5:

[0052] like Figure 5 As shown, in this embodiment, a first air-cooling channel 50 is provided, and the first air-cooling channel 50 is not arranged around the stator 230. A second port 70 is provided, and a fan 80 is provided at the second port 70. The first port 51 of the first air-cooling channel 50 is located in the first cavity wall 121, and the second port 70 is located in the second cavity wall 122. The first port 51 and the second port 70 are 180° apart in the circumferential direction of the stator 230, that is, the first port 51 and the second port 70 are diagonally arranged. The circuit board 40 forms a projection on the first cavity wall 121 or the second cavity wall 122. When the second port 70 and the circuit board 40 are projected onto the first cavity wall 121, the projections of the first port 51 and the second port 70 are located on both sides of the projection of the circuit board 40.

[0053] like Figure 5 As indicated by the arrow, in this embodiment, the gas flows diagonally within the second cavity 120, which also allows it to fully contact the circuit board 40 and remove heat from the surface of the circuit board 40, ensuring a good cooling effect on the circuit board 40.

[0054] Example 6:

[0055] like Figure 6As shown, in this embodiment, the outer casing 10 has a first wall 130 separating the first cavity 110 and the second cavity 120. The first wall 130 is provided with a second air-cooling channel 131 and a third opening 132. The second air-cooling channel 131 communicates with the first air-cooling channel 50, and the third opening 132 communicates with the second air-cooling channel 131 and the second cavity 120. Along the axial direction of the rotating shaft 220, the projection of the board surface of the circuit board 40 on the first wall 130 covers the third opening 132. The arrangement of the first air-cooling channel 50, the first opening 60, and the first fan 80 can be any of those in the above embodiments, but in this embodiment, the second opening 70 is an air outlet, and the fan 80 is a suction type fan 80 located at the second opening 70.

[0056] like Figure 6 As shown by the arrow, in this embodiment, after the gas enters the first air-cooling channel 50 through the first port 60, it flows through the first air-cooling channel 50 and the second air-cooling channel 131, and then flows out through the third port 132 and blows onto the surface of the circuit board 40, thereby improving the cooling effect on the circuit board 40.

[0057] Optionally, in this embodiment, the circuit board 40 may be parallel to the first cavity wall 121 and the second cavity wall 122, or the circuit board 40 may form an angle of 0-45° with the first cavity wall 121. When the circuit board 40 forms the above relationship with the first cavity wall 121 and the second cavity wall 122, the projection of the board surface of the circuit board 40 on the first wall 130 covers the third opening 132.

[0058] Optionally, in this embodiment, at least two second ports 70 are provided, and the at least two second ports 70 are arranged around the central axis L of the rotating shaft 220 (e.g., Figure 2 (As shown) are spaced apart and located around the projection of the circuit board 40 onto the second cavity wall 122. Each second opening 70 may be equipped with a fan 80, in which way, air is blown toward the circuit board 40 and flows toward the edge of the circuit board 40 and flows out from the second opening 70, thereby ensuring that the entire circuit board 40 can be cooled and improving the cooling effect of the circuit board 40.

[0059] Example 7:

[0060] like Figures 1-6 As shown, along the axial direction of the rotating shaft 220, there is a first gap between the circuit board 40 and the first cavity wall 121, and a second gap between the circuit board 40 and the second cavity wall 122. In this way, the circuit board 40 does not come into contact with the first cavity wall 121 and the second cavity wall 122 of the second cavity 120, and the gas can fully contact the circuit board 40, thereby improving the heat dissipation effect on the circuit board 40.

[0061] Optionally, in this embodiment, a mounting post may be fixed on the cavity wall of the second cavity 120, and the circuit board 40 may be mounted on the mounting post.

[0062] Optionally, a filter or waterproof and breathable membrane may be provided at the first port 60, and / or a filter or waterproof and breathable membrane may be provided at the second port 70, so as to reduce the contamination of the circuit board 40 by external dust, water and other impurities.

[0063] Example 8:

[0064] like Figures 7-9 As shown, in this embodiment, a third cavity 160 is provided within the wall of the outer casing 10. The third cavity 160 is spaced apart from the first cavity 110 and spaced apart from the second cavity 120. The stator 230 is disposed within the third cavity 160. A first liquid cooling channel 91 is formed between the rotor 210 and the cavity wall of the first cavity 110. A second liquid cooling channel 92 is formed inside the rotating shaft 220. The first liquid cooling channel 91 communicates with the outer peripheral region of the impeller 30, and the second liquid cooling channel 92 communicates with the central region of the impeller 30. A fourth port 221 is provided at the end of the rotating shaft 220 away from the impeller 30, and the fourth port 221 connects the first liquid cooling channel 91 and the second liquid cooling channel 92.

[0065] like Figures 7-10 As shown, pump 1 is also equipped with an inlet 140 and an outlet 150. The inlet 140 is connected to the central area of ​​the impeller 30, and the outlet 150 is connected to the outer peripheral area of ​​the impeller 30. When pump 1 is working, circuit board 40 sends a control signal to stator 230 to generate an alternating magnetic field in stator 230, causing rotor 210 to rotate. Rotor 210 drives shaft 220 and impeller 30 to rotate. Figures 7-9 As indicated by the arrow, water flows into the central region of the impeller 30 from the inlet 140. During the rotation of the impeller 30, the water is thrown to the outer peripheral region of the impeller 30. Part of the water in the outer peripheral region flows out through the outlet 150, and part of the liquid flows sequentially through the first liquid cooling channel 91, the fourth port 221 and the second liquid cooling channel 92, and flows back to the central region of the impeller 30. The liquid flowing to the central region of the impeller 30 is thrown to the outer peripheral region of the impeller 30 in the same manner. This cycle continues until the pump 1 stops working.

[0066] Meanwhile, in this embodiment, the circuit board 40 can also be cooled by air cooling, and the specific cooling method can be any of the methods described in the above embodiments.

[0067] As can be seen, in this embodiment, the stator 230 is disposed within the wall of the housing 10, preventing the housing 10 from contacting the coolant and air, thus extending the service life of the stator 230. Secondly, in this embodiment, the rotor 210 and stator 230 can be cooled by liquid cooling. Furthermore, in this embodiment, by combining liquid cooling and air cooling, the rotor 210, stator 230, and circuit board 40 within the pump 1 are cooled, greatly improving the heat dissipation effect of the pump 1 and providing all-around heat dissipation.

[0068] It is worth noting that in this embodiment, the end of the first air-cooling channel 50 that is away from the first port 51 is not connected to the first cavity 110, thereby preventing coolant from entering the second cavity 120 through the first air-cooling channel 50 and protecting the circuit board 40.

[0069] Optional, such as Figure 8 and Figure 9 As shown, the inner wall of the second liquid cooling channel 92 is provided with a spiral groove 222 or a spiral blade 223.

[0070] By setting the spiral groove 222 or the spiral blade 223, the spiral groove 222 or the spiral blade 223 provides a driving force to the fluid during the rotation of the shaft 220, allowing the fluid to flow more quickly through the second liquid cooling channel 92 to the central area of ​​the impeller 30, thereby improving the circulation capacity of the liquid cooling and ensuring the cooling effect and cooling efficiency.

[0071] Optional, such as Figure 10 As shown, a bearing 224 may be provided between the rotor 210 and the shaft 220.

[0072] Example 9:

[0073] The outer casing 10 can be a single, integral structure. Or, as... Figures 1-5 , Figures 7-10As shown, the outer casing 10 may include a first casing 11, a second casing 12, and a third casing 13; the first casing 11, the second casing 12, and the third casing 13 are connected along the axial direction of the pump 1 to form the outer casing 10. Specifically, in the axial direction of the pump 1, one end of the first casing 11 is connected to one end of the second casing 12, and the other end of the third casing 13 is connected to the second casing 12, forming the outer casing 10 after the connection is completed in the above manner. The inlet 140 and outlet 150 of the pump 1 are both disposed on the first casing 11, and the first wall 130 is disposed inside the second casing 12. The second casing 12 has a first inner wall located on one side of the first wall 130, and the first inner wall, the inner wall of the first casing 11, and the surface of the first wall 130 facing the first cavity 110 surround to form the first cavity 110; the second casing 12 has a second inner wall located on the other side of the first wall 130, and the second inner wall, the inner wall of the third casing 13, and the surface of the first wall 130 facing the second cavity 120 surround to form the second cavity 120. The third cavity 160 is formed within the wall of the second housing 12. The first air-cooling channel 50 is located within the wall of the second housing 12, and the first port 51 of the first air-cooling channel 50 penetrates the first wall 130.

[0074] The first port 60 is provided on the second housing 12, and the third port 132 is provided on the third housing 13.

[0075] Optionally, the first wall 130 may extend in the radial direction of the pump 1.

[0076] Optionally, the first housing 11, the second housing 12, and the third housing 13 can be connected by welding, snap-fitting, bolts, or other methods.

[0077] Example 10:

[0078] like Figure 6As shown, in this embodiment, the housing includes a first housing 11, a second housing 12, and a third housing 13. The second housing 12 includes a first sub-housing 1201 and a second sub-housing 1202. In the axial direction of the pump 1, one end of the first housing 11 is connected to one end of the first sub-housing 1201, and the other end of the first sub-housing 1201 is connected to one end of the second sub-housing 1202. The other end of the first sub-housing 1201 may form a first groove recessed along the axial direction of the pump 1, and one end of the second sub-housing 1202 may also form a second groove recessed along the axial direction of the pump 1. After the other end of the first sub-housing 1201 is connected to one end of the second sub-housing 1202, the first groove and the second groove are joined to form a second air-cooling flow channel 131. A third port 132 is provided at one end of the second sub-housing 1202. The other end of the second sub-housing 1202 is connected to the third housing 13. Inlet 140 and outlet 150 are disposed on the first housing 11. The inner wall of the first sub-housing 1201 and the inner wall of the first housing 11 form a first cavity 110. The inner wall of the second sub-housing 1202 and the inner wall of the third housing 13 form a second cavity 120. In this embodiment, the other end of the first sub-housing 1201 and one end of the second sub-housing 1202 are connected to form the first wall 130 in the above embodiment. The third cavity 160 and the first air-cooling channel 50 are disposed within the wall of the first sub-housing 1201. The first air-cooling channel 50 passes through the other end of the first sub-housing 1201 and communicates with the second air-cooling channel 131. A first opening 60 is disposed on the first sub-housing 1201, and a second opening 70 is disposed on the third housing 13.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pump, characterized in that, include: The outer casing has a first cavity and a second cavity spaced apart inside. An electric motor assembly includes a stator, a rotor, and a shaft, wherein at least a portion of the rotor and at least a portion of the shaft are located in a first cavity, the rotor is sleeved on the shaft, and the stator surrounds the outside of the rotor; An impeller, at least a portion of which is located in the first cavity and connected to one end of the rotating shaft; The circuit board is located in the second cavity; The outer shell has a first air-cooling channel on its wall, which is located on the outside of the stator and is connected to the second cavity. The outer casing has a first opening and a second opening. The first opening is connected to the first air-cooling channel, and the second opening is connected to the second cavity. One of the first opening and the second opening is an air inlet, and the other is an air outlet.

2. The pump according to claim 1, characterized in that, The pump includes: A fan is disposed at the first port and / or the second port.

3. The pump according to claim 1 or 2, characterized in that, The number of first air-cooling channels is at least two, and the at least two first air-cooling channels are arranged at intervals along the circumference of the stator. The first port is located on the side wall of the housing, and the number of first ports is at least two. The at least two first ports are arranged at intervals along the circumference of the stator. Each first air-cooling channel is connected to at least one first port. Alternatively, there may be one first air-cooling channel, which is arranged around the stator, and the first port is located on the side wall of the housing, with at least one first air-cooling channel corresponding to and connected to the first port.

4. The pump according to claim 3, characterized in that, The number of the second ports is at least two, and the at least two second ports are spaced apart around the central axis of the rotating shaft, and a fan is provided at at least one of the second ports.

5. The pump according to claim 1, 2, or 4, characterized in that, The cavity wall of the second cavity includes a first cavity wall and a second cavity wall, which are arranged opposite to each other along the axial direction of the rotating shaft; The first air-cooled channel has a first port communicating with the second cavity, the first port being disposed on the first cavity wall, and the second port being disposed on the second cavity wall; Along the axial direction of the rotating shaft, there is a first gap between the circuit board and the first cavity wall, and a second gap between the circuit board and the second cavity wall.

6. The pump according to claim 1, characterized in that, The number of the first air-cooling channels is at least two, and the at least two first air-cooling channels are arranged at intervals along the circumference of the stator; The number of the second ports is at least two, and the at least two second ports are spaced apart around the central axis of the rotating shaft; The first air-cooling channel and the second port are in one-to-one correspondence. The first air-cooling channel has a first port that communicates with the second cavity. Along the axial direction of the rotating shaft, each second port is arranged opposite to the first port of the corresponding first air-cooling channel.

7. The pump according to claim 1, characterized in that, The outer shell has a first wall separating the first cavity and the second cavity. The first wall is provided with a second air-cooling channel and a third opening. The second air-cooling channel is connected to the first air-cooling channel, and the third opening is connected to the second air-cooling channel and the second cavity. Along the axial direction of the rotating shaft, the projection of the circuit board onto the first wall covers the third opening.

8. The pump according to claim 1, 2, 4, 6, or 7, characterized in that, A first liquid cooling channel is formed between the rotor and the cavity wall of the first cavity, and a second liquid cooling channel is formed inside the rotating shaft. The first liquid cooling channel is connected to the outer peripheral region of the impeller, and the second liquid cooling channel is connected to the central region of the impeller. The end of the rotating shaft away from the impeller is provided with a fourth port, which connects the first liquid cooling channel and the second liquid cooling channel.

9. The pump according to claim 8, characterized in that, The inner wall of the second liquid cooling channel is provided with spiral grooves or spiral blades.

10. The pump according to claim 1, 2, 4, 6, 7, or 9, characterized in that, A filter screen or a waterproof and breathable membrane is provided at the first opening, and / or a filter screen or a waterproof and breathable membrane is provided at the second opening.

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