Pump

Abstract

The invention relates to the field of adjustment, in particular to a pump good in heat dissipation performance, the pump is provided with a first flow path and a second flow path, a first liquid inlet communicates with the first flow path and the second flow path, the first flow path is located outside a first cavity, and the first flow path comprises a first liquid outlet and a cavity corresponding to a spraying pipe; the second flow path comprises a first liquid inlet, a first cavity, a second liquid outlet and a cavity corresponding to the injection pipe, the cavity corresponding to the injection pipe is communicated with the first liquid outlet and the receiving chamber, the cavity corresponding to the injection pipe is communicated with the second liquid outlet and the receiving chamber, and the cavity corresponding to the mixing pipe is communicated with the mixing outlet and the receiving chamber; the pressure at the second liquid outlet is defined to be F1, the pressure at the receiving chamber is F2, and F2 is smaller than F1; the pressure at the first liquid outlet is defined as F3, and F3 is greater than F1; liquid in the first flow path is led into the first cavity, the liquid flows out of the first cavity after entering the first cavity, heat generated by the motor assembly located in the first cavity is taken away in time, and the heat dissipation performance of the pump is improved.

Description

[Technical field]

[0001] The invention relates to the field of fluid regulation, and in particular to a pump. [Background technology]

[0002] refer to Fig. 9 A pump provides a power source for a lubrication system and / or a cooling system of a vehicle. In the existing technical solution, the pump includes a pump housing 1', a pump chamber 2' and a motor assembly 3'. At least a portion of the motor assembly 3' is located in the pump chamber 2'. The motor assembly 3' generates heat during operation, and when the heat accumulates to a certain level, it cannot be dissipated in time, thereby affecting the performance of the motor assembly. [Summary of the invention]

[0003] The technical problem solved by the present invention is to provide a pump with better heat dissipation performance;

[0004] A pump comprises a shell and a motor assembly. The pump further comprises a first cavity corresponding to the shell, at least part of the motor assembly is located in the first cavity, the pump comprises a first flow path and a second flow path, the first flow path is located outside the first cavity, the pump comprises a first liquid outlet, a first liquid inlet and a second liquid outlet, the first liquid inlet connects the first flow path with the second flow path, the pump comprises an ejection part, the ejection part comprises a mixing outlet and a receiving chamber, the ejection part further comprises an injection pipe, a mixed outlet pipe and an ejection pipe, the cavity corresponding to the injection pipe connects the first liquid outlet and the receiving chamber, the cavity corresponding to the ejection pipe connects the second liquid outlet and the receiving chamber, and the cavity corresponding to the mixed outlet pipe connects the mixing outlet and the receiving chamber; it is defined that the pressure at the second liquid outlet is F1, the pressure at the receiving chamber is F2, F2<F1; it is defined that the pressure at the first liquid outlet is F3, F3>F1; the first flow path comprises the first liquid outlet and the cavity corresponding to the injection pipe, the second flow path comprises the first liquid inlet, the first cavity, the second liquid outlet and the cavity corresponding to the ejection pipe.

[0005] Such a pump has a first flow path and a second flow path, the first flow path includes a first liquid outlet and a cavity corresponding to the injection pipe, the second flow path includes a first liquid inlet, a first cavity, a second liquid outlet and a cavity corresponding to the ejection pipe, the cavity corresponding to the ejection pipe connects the first liquid outlet and the receiving chamber, the cavity corresponding to the ejection pipe connects the second liquid outlet and the receiving chamber, and the cavity corresponding to the mixed outlet pipe connects the mixed outlet and the receiving chamber; it is defined that the pressure at the second liquid outlet is F1, and the pressure at the receiving chamber is F2, F2<F1; it is defined that the pressure at the first liquid outlet is F3, F3>F1; that is, when the liquid flows through the receiving chamber, the flow rate is accelerated, the hydraulic pressure is reduced, and the pressure at the receiving chamber is less than the pressure at the second liquid outlet, so that the first The liquid in the two flow paths enters the receiving chamber from the first cavity through the second liquid outlet and the cavity corresponding to the ejection tube, and then the liquid entering the receiving chamber from the second liquid outlet and the cavity corresponding to the ejection tube and the liquid entering the receiving chamber from the first liquid outlet and the cavity corresponding to the injection tube flow out from the mixed outlet together, so that the liquid in the first cavity flows out of the first cavity; the first flow path is located outside the first cavity, the second flow path includes the first liquid inlet, the first cavity, the second liquid outlet and the cavity corresponding to the ejection tube, and the first liquid inlet connects the first flow path with the second flow path, so that the liquid in the first flow path is introduced into the first cavity, and the liquid flows out from the first cavity after entering the first cavity, so that the heat generated by the motor component located in the first cavity is taken away in time, thereby improving the heat dissipation performance of the pump.

Brief Description of the Drawings

[0006] Figure 1 A cross-sectional view of a pump in which the first liquid outlet is located on the peripheral side of the pump cover and the third liquid outlet is located on the top wall of the base;

[0007] Figure 2 is a schematic diagram of an embodiment in which the first liquid outlet is located on the peripheral side of the pump cover;

[0008] Figure 3 is a cross-sectional view of an embodiment in which the first liquid outlet is located on the peripheral side of the pump cover;

[0009] Figure 4 is a cross-sectional view of an embodiment in which the first liquid outlet is located on the peripheral side of the pump cover;

[0010] Figure 5 is a cross-sectional view of a pump in an embodiment in which the first liquid outlet is located on the top wall of the base;

[0011] Figure 6 is a schematic diagram of a pump cover in an embodiment in which the first liquid outlet is located on the top wall of the base;

[0012] Figure 7 is a schematic diagram of a pump cover in an embodiment in which the third liquid outlet is located at the ejection part;

[0013] Figure 8 is a schematic diagram of a cycloidal rotor;

[0014] Fig. 9It is a cross-sectional view of the background technology.

[0015] Reference numerals:

[0016] Shell 1, first recessed portion 11, first bottom wall portion 111, first side wall portion 112, first top wall portion 113;

[0017] Motor assembly 2, rotor 21, stator 22, first rotating shaft 23;

[0018] The ejection part 3 includes a nozzle inlet 31, an ejection port 32, a mixing outlet 33, and a receiving chamber 34; an injection pipe 35, a mixing outlet pipe 36, and an ejection pipe 37;

[0019] Pump cover 4, base 41, base bottom wall portion 411, base top wall portion 412, second recessed portion 42, drainage wall portion 43;

[0020] Cycloid rotor 5, inner rotor 51, outer rotor 52;

[0021] First cavity 100; first liquid outlet 110; second liquid inlet 120; second cavity 200; first liquid inlet 210; second liquid outlet 220; third liquid outlet 230; first flow path 300; second flow path 400, first plane 600, second plane 700;

[0022] Pump housing 1', pump chamber 2', motor assembly 3'. [Specific implementation method]

[0023] The technical solution of the specific implementation is described below in conjunction with the accompanying drawings:

[0024] refer to Figure 1-Figure 7 A pump includes a housing 1 and a motor assembly 2, the motor assembly 2 includes a rotor 21, a stator 22 and a first rotating shaft 23, the first rotating shaft 23 and the rotor 21 are limitedly connected or have an integral structure, the stator 22 is limited to the housing 1, the pump also includes a first cavity 100 corresponding to the housing 1, at least part of the motor assembly 2 is located in the first cavity 100, the motor assembly 2 generates heat when working, and in order to avoid heat accumulation in the first cavity 100, timely heat dissipation is required.

[0025] The pump includes a first flow path 300 and a second flow path 400, the first flow path 300 is located outside the first cavity 100, the pump has a first liquid outlet 110, a first liquid inlet 210 and a second liquid outlet 220, the first liquid inlet 210 connects the first flow path 300 and the second flow path 400, the pump includes an ejection part 3, the ejection part 3 includes a mixing outlet 33 and a receiving chamber 34, the ejection part 3 also includes an injection pipe 35, a mixing outlet pipe 36 and an ejection pipe 37, the cavity corresponding to the injection pipe 35 connects the first liquid outlet 110 and the receiving chamber 34, the ejection pipe 37 is connected to the first liquid outlet 110 and the receiving chamber 34, and the ejection pipe 37 is connected to the first liquid outlet 110 and the receiving chamber 34. The corresponding cavity connects the second liquid outlet 220 and the receiving chamber 34, and the cavity corresponding to the mixing pipe 36 connects the mixing outlet 33 and the receiving chamber 34; it is defined that the pressure at the second liquid outlet 220 is F1, and the pressure at the receiving chamber 34 is F2, F2<F1; it is defined that the pressure at the first liquid outlet 110 is F3, F3>F1; the first flow path 300 includes the first liquid outlet 110 and the cavity corresponding to the injection pipe 35, and the second flow path 400 includes the first liquid inlet 210, the first cavity 100, the second liquid outlet 220 and the cavity corresponding to the ejection pipe 37.

[0026] Such a pump has a first flow path 300 and a second flow path 400, the first flow path 300 includes a first liquid outlet 110 and a cavity corresponding to the injection pipe 35, the second flow path 400 includes a first liquid inlet 210, a first cavity 100, a second liquid outlet 220 and a cavity corresponding to the ejection pipe 37, the cavity corresponding to the ejection pipe 35 connects the first liquid outlet 110 and the receiving chamber 34, the cavity corresponding to the ejection pipe 37 connects the second liquid outlet 220 and the receiving chamber 34, and the cavity corresponding to the mixed outlet pipe 36 connects the mixed outlet 33 and the receiving chamber 34; it is defined that the pressure at the second liquid outlet 220 is F1, and the pressure at the receiving chamber 34 is F2, F2 < F1; it is defined that the pressure at the first liquid outlet 110 is F3, F3 > F1; that is, when the liquid flows through the receiving chamber 34, the flow rate is accelerated, the hydraulic pressure is reduced, and the pressure at the receiving chamber 34 is less than the pressure at the second liquid outlet 220, so that the liquid in the second flow path 400 flows from the first liquid outlet 220 to the receiving chamber 34. The liquid in the first cavity 100 enters the receiving chamber 34 through the second liquid outlet 220 and the cavity corresponding to the ejection tube 37, and then the liquid entering the receiving chamber 34 from the second liquid outlet 220 and the cavity corresponding to the ejection tube 37 and the liquid entering the receiving chamber 34 from the first liquid outlet 110 and the cavity corresponding to the injection tube 35 flow out from the mixing outlet 33 together, so that the liquid in the first cavity 100 flows out of the first cavity 100; the first flow path 300 is located outside the first cavity 100, the second flow path 400 includes the first liquid inlet 210, the first cavity 100, the second liquid outlet 220 and the cavity corresponding to the ejection tube 37, and the first liquid inlet 210 connects the first flow path 300 with the second flow path 400, so that the liquid in the first flow path 300 is introduced into the first cavity 100, and the liquid flows out from the first cavity 100 after entering the first cavity 100, so that the heat generated by the motor assembly 2 located in the first cavity 100 is taken away in time, thereby improving the heat dissipation performance of the pump.

[0027] In one embodiment, reference Figure 1 Specifically, the pump has a second cavity 200 and a second liquid inlet 120, the second liquid inlet 120 and the second cavity 200 are connected, the second cavity 200 and the first liquid outlet 110 are connected, the first flow path 300 includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110 and the cavity corresponding to the injection pipe 35, the pump has a cycloid rotor 5, the cycloid rotor 5 is located in the second cavity 200, the motor assembly 2 drives the cycloid rotor 5 to rotate, the liquid enters the second cavity 200 from the second liquid inlet 120, and flows out of the second cavity 200 from the first liquid outlet 110 through the cycloid rotor 5. The cycloid rotor 5 includes an inner rotor 51 and an outer rotor 52, a high-pressure cavity and a low-pressure cavity are formed between the inner rotor 51 and the outer rotor 52, the first liquid outlet 110 corresponds to the high-pressure cavity, the first liquid inlet 210 corresponds to the low-pressure cavity, the pressure at the first liquid outlet 110 is F3, the pressure at the second liquid outlet 220 is F1, and F3>F1.

[0028] Such a pump includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110 and the cavity corresponding to the injection pipe 35 through the first flow path 300, that is, the liquid in the first flow path 300 enters the second cavity 200 from the second liquid inlet 120, and after entering the second cavity 200, the liquid enters the receiving chamber 34 from the first liquid outlet 110 and the cavity corresponding to the injection pipe 35. The second flow path 400 includes the first liquid inlet 210, the first cavity 100, the second liquid outlet 220 and the cavity corresponding to the injection pipe 37. It is defined that the pressure F1 at the second liquid outlet and the pressure F2 at the receiving chamber are F2<F1; that is, the pressure from the first liquid outlet 110 to the receiving chamber is F2<F1. When the outflowing liquid flows through the receiving chamber 34, the flow rate is accelerated, the hydraulic pressure is reduced, and the pressure is less than the pressure of the second liquid outlet 220, so that the liquid in the second flow path 400 flows out of the first cavity 100 through the second liquid outlet 220 from the first cavity 100, flows through the cavity of the ejector tube 37 and enters the receiving chamber 34, and then the liquid in the second flow path 400 and the liquid in the first flow path 300 flow out from the mixing outlet 33 together, so that the liquid in the first cavity 100 flows out of the first cavity 100. Specifically, the mixing outlet 33 can be connected to the second liquid inlet 120 to realize the circulation path of the liquid from the first cavity 100 to the second cavity 200.

[0029] It should be noted that the mixing outlet 33 may be in communication with the second liquid inlet 120 , which may be understood as the wall portion corresponding to the mixing outlet 33 and the wall portion corresponding to the second liquid inlet 120 being directly or indirectly connected.

[0030] Specifically, refer to Figure 1The pump includes a pump cover 4 matched with the housing 1; the pump cover 4 and the ejection part 3 are split structures, and / or the housing 1 and the ejection part 3 are split structures; specifically, the wall portion corresponding to the second cavity 200 is at least part of the pump cover 4, the wall portion corresponding to the second cavity 200 is at least part of the housing 1, the ejection part 3 also includes a nozzle inlet 31 and an ejection port 32, the receiving chamber 34 is respectively connected to the nozzle inlet 31 and the ejection port 32, the nozzle inlet 31 is connected to the first liquid outlet 110, the ejection port 32 is connected to the second liquid outlet 220, and the first flow path 300 includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110, the nozzle inlet 31 and the cavity corresponding to the injection pipe 35. In this way, the pump cover 4 and the ejection part 3 are split structures, and / or the housing 1 and the ejection part 3 are split structures, which is more convenient for manufacturing the ejection part 3.

[0031] It should be noted that the split structure can be understood as the pump cover 4 and / or the shell 1 and the ejection part 3 are manufactured separately and then assembled by connection. It can be a physical connection, such as a mechanical connection, or one of the parts is placed as an insert in the mold of another part. After the other part is formed, the two parts are assembled; it can also be a chemical connection, such as welding.

[0032] As other embodiments (not shown in the figure), the pump cover 4 and the ejection part 3 are an integral structure, and / or the housing 1 and the ejection part 3 are an integral structure; such a pump reduces the number of assembly steps during assembly and is more convenient.

[0033] In one embodiment, reference Figure 1-Figure 7 , the pump cover 4 and the ejection part 3 are separate structures, the first liquid outlet 110 is located in the pump cover 4, and the nozzle inlet 31 is connected to the first liquid outlet 110, that is, the wall corresponding to the nozzle inlet 31 can be directly connected to the pump cover 4, which is convenient for setting a sealing device between the wall corresponding to the nozzle inlet 31 and the pump cover 4. Compared with other embodiments, this embodiment is more convenient to achieve a sealed connection between the wall corresponding to the nozzle inlet 31 and the pump cover 4. For example, the pump has a pump cover 4 that matches the housing 1, the wall corresponding to the second cavity 200 is at least part of the pump cover 4, and the wall corresponding to the second cavity 200 is at least part of the housing 1, that is, the wall corresponding to the second cavity 200 is composed of the pump cover 4 and the housing 1, the first liquid outlet 110 is connected to the second cavity 200, and the wall corresponding to the first liquid outlet 110 is also composed of the pump cover 4 and the housing 1. In this embodiment, the wall corresponding to the first liquid outlet 110 is also composed of the pump cover 4 and the housing 1, and the wall corresponding to the first liquid outlet 110 is connected to the wall corresponding to the first liquid outlet 110, which is inconvenient to seal.

[0034] Specifically, the shell 1 has a first recessed portion 11, the first recessed portion 11 includes a first bottom wall portion 111 corresponding to the second cavity 200 and a first side wall portion 112 corresponding to the second cavity 200, the shell 1 includes a first top wall portion 113, the first side wall portion 112 extends from the first bottom wall portion 111 toward the first top wall portion 113, the pump cover 4 includes a base 41, the base 41 has a base bottom wall portion 411, at least a portion of the base bottom wall portion 411 is arranged opposite to the first bottom wall portion 111, and at least a portion of the base bottom wall portion 411 cooperates with the first top wall portion 113, so that the wall portion corresponding to the second cavity 200 includes at least a portion of the shell 1, and the wall portion corresponding to the second cavity 200 includes at least a portion of the pump cover 4.

[0035] Of course, the first liquid outlet 110 is located at the pump cover 4, and can be located at different positions of the pump cover 4:

[0036] For example, in one embodiment, referring to Figure 5 and Figure 6 The base 41 also has a base top wall portion 412 located on the opposite side of the base bottom wall portion 411. The base 41 has a second recessed portion 42, which is recessed from the base bottom wall portion 411 toward the base top wall portion 412. The first liquid outlet 110 is connected to the cavity corresponding to the second recessed portion 42, and at least a portion of the first liquid outlet 110 is located on the peripheral side of the base 41.

[0037] Such a pump is arranged relative to the first bottom wall portion 111 through at least a portion of the bottom wall portion 411 of the base, and the second recessed portion 42 is recessed from the bottom wall portion 411 of the base toward the top wall portion 412 of the base, that is, the second cavity 200 includes a cavity corresponding to the first recessed portion 11 and a cavity corresponding to the second recessed portion 42, the first liquid outlet 110 and the cavity corresponding to the second recessed portion 42 are connected, and the liquid entering the second cavity 200 from the second liquid inlet 120 flows through the second recessed portion 42 and then flows out from the first liquid outlet 110, the wall portion corresponding to the nozzle inlet 31 is connected to the wall portion corresponding to the first liquid outlet 110, the wall portion corresponding to the injection port 32 is connected to the wall portion corresponding to the second liquid outlet 220, the receiving chamber 34 is connected to the injection port 32 and the nozzle inlet 31 respectively, and the second liquid outlet 220 is located at the shell The body 1 and the wall portion corresponding to the receiving chamber 34 are arranged on the peripheral side of the shell body 1 and / or the pump cover 4, which is convenient for connecting the wall portion corresponding to the second liquid outlet 220 and the wall portion corresponding to the injection port 32, and the wall portion corresponding to the injection port 32 and the wall portion corresponding to the receiving chamber 34; at least a part of the first liquid outlet 110 is arranged on the peripheral side of the base 41, compared with at least a part of the first liquid outlet 110 being located on the top wall portion 412 of the base, the wall portion corresponding to the first liquid outlet 110 and the wall portion corresponding to the nozzle inlet 31, and the wall portion corresponding to the nozzle inlet 31 are more convenient to connect, and more specifically, it is convenient to set the pipeline from the nozzle inlet 31 to the receiving chamber 34, so that the pipeline corresponding to the injection portion 3 from the nozzle inlet 31 to the receiving chamber 34 is more miniaturized, thereby realizing miniaturization of the pump.

[0038] Specifically, refer to Figure 2-Figure 3 The pump cover 4 has a drainage wall portion 43 corresponding to the first liquid outlet 110. It is defined that the plane corresponding to at least part of the drainage wall portion 43 is a first plane 600, and the extended surface of at least part of the base bottom wall portion 411 is a second plane 700; the first plane 600 is flush with the second plane 700.

[0039] In such a pump, at least a portion of the bottom wall portion 411 of the base is arranged opposite to the first bottom wall portion 111, that is, at least a portion of the bottom wall portion 411 of the base and the first bottom wall portion 111 are at least a portion of the wall portion corresponding to the second cavity 200, that is, the liquid enters the second cavity 200 from the second liquid inlet 120, and the second cavity 200 includes a cavity corresponding to the first recessed portion 11 and a cavity corresponding to the second recessed portion 42, and a plane corresponding to at least a portion of the drainage wall portion 43 is a first plane 600, and an extended surface of at least a portion of the bottom wall portion 411 of the base is a second plane 700; the first plane 600 and the second plane 700 are flush, and compared with other embodiments, the resistance of the drainage wall portion 43 to the liquid can be reduced; for example, the first plane 600 is higher than the second plane 700, that is, relative to the second plane 700, the first plane 600 is closer to the top wall portion 412 of the base, with reference to Figure 4 , so that the resistance of the drainage wall portion 43 to the liquid flowing out of the first liquid outlet 110 increases.

[0040] For another example, in one embodiment, referring to Figure 5 The base 41 also has a base top wall portion 412 located on the opposite side of the base bottom wall portion 411. The base 41 has a second recessed portion 42, which is recessed from the base bottom wall portion 411 toward the base top wall portion 412. The first liquid outlet 110 is connected to the cavity corresponding to the second recessed portion 42, and at least a portion of the first liquid outlet 110 is located on the base top wall portion 412.

[0041] Such a pump is recessed from the bottom wall portion 411 of the base toward the top wall portion 412 of the base through the second recessed portion 42, the first liquid outlet 110 is connected to the cavity corresponding to the second recessed portion 42, at least part of the first liquid outlet 110 is located on the top wall portion 412 of the base, that is, a hole portion is provided on the pump cover 4, one end of the hole portion is the first liquid outlet 110 located on the top wall portion 412 of the base, and the other end of the hole portion is located at the wall portion corresponding to the second recessed portion 42, the hole portion is connected to the pump cover 4 along the axial direction of the motor assembly 2, and the structure is simpler; at the same time, the integrity of the peripheral side of the pump cover 4 can be ensured, and a sealing device is provided on the peripheral side of the pump cover 4 and between the pump cover 4 and the housing 1 to ensure the sealing inside and outside of the second cavity 200.

[0042] As other embodiments, the pump cover 4 and the injection part 3 are an integral structure, and the first flow path 300 includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110 and the cavity corresponding to the injection pipe 35; and / or the shell 1 and the injection part 3 are an integral structure, and the second flow path 400 includes the first liquid inlet 210, the first cavity 100 and the second liquid outlet 220. The integral structure is more conducive to the sealing of the flow path. For the embodiment of the split structure, the effect brought about by the first liquid outlet 110 being arranged at different positions of the pump cover 4 can still be achieved in the present embodiment and will not be repeated here.

[0043] In one embodiment, reference Figure 1 and Figure 7 The pump has a second cavity 200, the first liquid outlet 110 is connected to the second cavity 200, the pump has a pump cover 4 matched with the shell 1, the wall corresponding to the second cavity 200 is at least a part of the pump cover 4, the wall corresponding to the second cavity 200 is at least a part of the shell 1, the pump has a second liquid inlet 120 and a third liquid outlet 230, the second liquid inlet 120 is located at the pump cover 4, the first flow path 300 includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110 and the cavity corresponding to the injection pipe 35, and the third liquid outlet 230 is located at the wall corresponding to the first flow path 300.

[0044] Such a pump includes the second liquid inlet 120, the second cavity 200, the first liquid outlet 110 and the cavity corresponding to the injection pipe 35 through the first flow path 300. The third liquid outlet 230 is located at the wall corresponding to the first flow path 300, that is, the liquid flows out from the third liquid outlet 230. More specifically, the liquid flowing out of the third liquid outlet 230 does not flow through the receiving chamber 34, ensuring that the pressure of the liquid flowing out of the third liquid outlet 230 is not affected by the receiving chamber 34. More specifically, the liquid flowing out of the third liquid outlet 230 can flow through the second liquid inlet 120 and then enter the second cavity 200 after providing lubrication or cooling to the components, thereby realizing the circulation of the liquid flowing out of the third liquid outlet 230.

[0045] Specifically, the shell 1 has a first recessed portion 11, the first recessed portion 11 includes a first bottom wall portion 111 corresponding to the second cavity 200 and a first side wall portion 112 corresponding to the second cavity 200, the shell 1 includes a first top wall portion 113, the first side wall portion 112 extends from the first bottom wall portion 111 toward the first top wall portion 113, the pump cover 4 includes a base 41, the base 41 has a base bottom wall portion 411, at least a portion of the base bottom wall portion 411 is arranged opposite to the first bottom wall portion 111, and at least a portion of the base bottom wall portion 411 cooperates with the first top wall portion 113, so that the wall portion corresponding to the second cavity 200 includes at least a portion of the shell 1, and the wall portion corresponding to the second cavity 200 includes at least a portion of the pump cover 4.

[0046] Of course, the third liquid outlet 230 is located at different positions of the pump:

[0047] For example, the base 41 also has a base top wall 412 located on the opposite side of the base bottom wall 411, and the base 41 has a second recessed portion 42, which is recessed from the base bottom wall 411 toward the base top wall 412, and the third liquid outlet 230 is located on the base top wall 412, so that the liquid flows out of the second cavity 200 from the third liquid outlet 230, that is, a hole portion is set on the pump cover 4, one end of the hole portion is the third liquid outlet 230 located on the base top wall 412, and the other end of the hole portion is located at the wall portion corresponding to the second recessed portion 42, and the hole portion connects the two sides of the pump cover 4 along the axial direction of the motor assembly 2, and the structure is simpler. Specifically, the third liquid outlet 230 corresponds to the high-pressure cavity, so that the high-pressure liquid flows out of the second cavity 200 from the third liquid outlet 230.

[0048] For another example, the third liquid outlet 230 is located on the wall of the injection pipe 35. In such a pump, the cavity corresponding to the injection pipe 35 is connected to the first liquid outlet 110 and the receiving chamber 34 through the third liquid outlet 230 located on the wall of the injection pipe 35, that is, before the liquid entering the injection part 3 from the first liquid outlet 110 enters the receiving chamber 34, part of the liquid flows to the receiving chamber 34, and the other part flows out from the third liquid outlet 230, and the liquid flowing out from the third liquid outlet 230 does not flow through the receiving chamber 34, which can ensure that the pressure of the corresponding liquid is not affected by the receiving chamber 34, and is still a high-pressure liquid flowing out from the first liquid outlet 110.

[0049] In one embodiment, reference Figure 1 , Figure 5 and Figure 7 The first liquid outlet 110 and the second liquid outlet 220 are located on the same side of the rotor 21 along the axial direction of the first rotating shaft 23. In this way, the capacity of the liquid in the first cavity 100 is maximized, the heat dissipation is more sufficient, and the heat dissipation performance of the pump is improved.

[0050] In one embodiment, reference Figure 1 , Figure 5 and Figure 7 The injection portion 3 has an injection pipe 35 and a mixing pipe 36. The cavity corresponding to the injection pipe 35 is connected to the first liquid outlet 110 and the receiving chamber 34. The cavity corresponding to the mixing pipe 36 is connected to the receiving chamber 34 and the mixing outlet 33. At least part of the injection pipe 35 and at least part of the mixing pipe 36 extend along the axial direction of the motor assembly 2.

[0051] Such a pump, by at least part of the injection pipe and at least part of the mixing pipe extending along the axis direction of the motor assembly 2, that is, the length dimension of the ejection part 3 is along the axis direction of the motor assembly, is more conducive to the miniaturization design of the pump compared with other embodiments. For example, the length dimension of the ejection part 3 is along the radial direction of the motor assembly 2, making the radial dimension of the pump longer, which is not conducive to the miniaturization design of the pump.

[0052] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A pump, comprising a housing (1) and a motor assembly (2), the pump further comprising a first cavity (100) corresponding to the housing (1), at least a portion of the motor assembly (2) being located in the first cavity (100), characterized in that: The pump comprises a first flow path (300) and a second flow path (400), wherein the first flow path (300) is located outside the first cavity (100), the pump comprises a first liquid outlet (110), a first liquid inlet (210) and a second liquid outlet (220), wherein the first liquid inlet (210) is connected to the first flow path (300) and the second flow path (400), the pump comprises an ejection part (3), wherein the ejection part (3) comprises a mixing outlet (33) and a receiving chamber (34), the ejection part (3) further comprises an injection pipe (35), a mixing outlet pipe (36) and an ejection pipe (37), the cavity corresponding to the injection pipe (35) is connected to the first liquid outlet (110) and the receiving chamber (34), ... The cavity corresponding to the tube (37) is connected to the second liquid outlet (220) and the receiving chamber (34), and the cavity corresponding to the mixed outlet tube (36) is connected to the mixed outlet (33) and the receiving chamber (34); it is defined that the pressure at the second liquid outlet (220) is F1, and the pressure at the receiving chamber (34) is F2, F2<F1; it is defined that the pressure at the first liquid outlet (110) is F3, F3>F1; the first flow path (300) includes the first liquid outlet (110) and the cavity corresponding to the injection tube (35), and the second flow path (400) includes the first liquid inlet (210), the first cavity (100), the second liquid outlet (220) and the cavity corresponding to the ejection tube (37).

2. The pump according to claim 1, characterized in that The pump comprises a pump cover (4) matched with the housing (1), the pump has a second cavity (200), the wall portion corresponding to the second cavity (200) is at least a part of the pump cover (4), the wall portion corresponding to the second cavity (200) is at least a part of the housing (1), the pump has a second liquid inlet (120), the second liquid inlet (120) and the first liquid outlet (110) are respectively located on the pump cover (4), and the first flow path (300) comprises the second liquid inlet (120), the second cavity (200), the first liquid outlet (110) and the cavity corresponding to the injection pipe (35).

3. The pump according to claim 1, characterized in that The pump has a second cavity (200), the pump has a pump cover (4) matched with the shell (1), the wall portion corresponding to the second cavity (200) is at least a part of the pump cover (4), the wall portion corresponding to the second cavity (200) is at least a part of the shell (1), the pump has a second liquid inlet (120) and a third liquid outlet (230), the second liquid inlet (120) is located on the pump cover (4), the first flow path (300) includes the second liquid inlet (120), the second cavity (200), the first liquid outlet (110) and the cavity corresponding to the injection pipe (35), and the third liquid outlet (230) is located on the wall portion corresponding to the first flow path (300).

4. The pump according to claim 2, characterized in that The shell (1) has a first recessed portion (11), the first recessed portion (11) includes a first bottom wall portion (111) corresponding to the second cavity (200) and a first side wall portion (112) corresponding to the second cavity (200), the shell (1) includes a first top wall portion (113), the first side wall portion (112) extends from the first bottom wall portion (111) toward the first top wall portion (113), the pump cover (4) includes a base (41), the base (41) has a base bottom wall portion (411), at least a portion of the base bottom wall portion (411) is arranged opposite to the first bottom wall portion (111), and at least a portion of the base bottom wall portion (411) cooperates with the first top wall portion (113).

5. The pump according to claim 4, characterized in that The base (41) further comprises a base top wall portion (412) located on the opposite side of the base bottom wall portion (411); the base (41) comprises a second recessed portion (42); the second recessed portion (42) is recessed from the base bottom wall portion (411) toward the base top wall portion (412); the first liquid outlet (110) and the cavity corresponding to the second recessed portion (42) are connected; at least a portion of the first liquid outlet (110) is located on the peripheral side of the base (41) or at least a portion of the first liquid outlet (110) is located on the base top wall portion (412).

6. The pump according to claim 5, characterized in that The pump cover (4) has a drainage wall portion (43) corresponding to the first liquid outlet (110), and it is defined that the plane corresponding to at least part of the drainage wall portion (43) is a first plane (600), and the extended surface of at least part of the bottom wall portion (411) of the base is a second plane (700); the first plane (600) and the second plane (700) are flush.

7. The pump according to claim 3, characterized in that The shell (1) has a first recessed portion (11), the first recessed portion (11) includes a first bottom wall portion (111) corresponding to the second cavity (200) and a first side wall portion (112) corresponding to the second cavity (200), the shell (1) includes a first top wall portion (113), the first side wall portion (112) extends from the first bottom wall portion (111) toward the first top wall portion (113), the pump includes a pump cover (4), the pump cover (4) includes a base (41), the base (41) has a base bottom wall portion (411), at least a portion of the base bottom wall portion (411) is arranged opposite to the first bottom wall portion (111), and at least a portion of the base bottom wall portion (411) cooperates with the first top wall portion (113).

8. The pump according to claim 7, characterized in that The base (41) further comprises a base top wall portion (412) located on the opposite side of the base bottom wall portion (411), the base (41) comprises a second recessed portion (42), the second recessed portion (42) is recessed from the base bottom wall portion (411) toward the base top wall portion (412), the third liquid outlet (230) is located on the base top wall portion (412); or the third liquid outlet (230) is located on the tube wall of the injection tube (35).

9. The pump according to claim 1, characterized in that The motor assembly (2) comprises a rotor (21), a stator (22) and a first rotating shaft (23); at least a portion of the first rotating shaft (23), the rotor (21) and the stator (22) are located in the first cavity (100); and the first liquid outlet (110) and the second liquid outlet (220) are located on the same side of the rotor (21) along the axial direction of the first rotating shaft (23).

10. The pump according to claim 1, characterized in that At least a portion of the injection pipe (35) and at least a portion of the mixing outlet pipe (36) extend along the axial direction of the motor assembly (2).

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