Motor cooling structure and totally-enclosed pump

Abstract

The utility model discloses a motor cooling structure and totally enclosed pump relates to pump technical field, wherein, motor cooling structure, including pump casing and drive part, the utility model discloses the technical scheme of setting up for the flow of refrigerant through channel in stator, and the stator is directly fixed in drive space, so that in drive part work makes refrigerant pressurized output, and refrigerant directly passes through the through channel on the stator and passes drive part, and the refrigerant of through channel can realize the direct refrigeration heat dissipation of stator and rotor, and the stator is directly fixed on the inner wall of drive space, and the additional setting of motor shell is saved, and the cost is reduced, and the heat generated by drive part work does not need to carry out heat dissipation through the conduction of motor shell, greatly improves the efficiency of heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and in particular to a motor cooling structure and a fully enclosed pump. Background Technology

[0002] The motor of a fully enclosed refrigerant pump is built into the pump body. The motor uses insulating materials compatible with the refrigerant, and the refrigerant is in direct contact with the motor. Typically, the motor stator requires a mounting housing for fixation. The refrigerant fluid, pressurized by the pump, is transported through a channel between the motor housing and the pump housing, simultaneously cooling the motor.

[0003] To ensure smooth fluid flow, a passage needs to be added to the motor housing, and sufficient space must be left between the motor housing and the pump housing for the fluid to pass through. This increases the complexity and cost of processing and assembling the motor housing, and the heat generated by the stator needs to be transferred to the refrigerant in the passage through the motor housing, which increases thermal resistance and affects heat dissipation. Utility Model Content

[0004] The main purpose of this invention is to propose a motor cooling structure and a fully enclosed pump, which aims to improve the heat dissipation efficiency of the motor inside the pump body.

[0005] To achieve the above objectives, the present invention proposes a motor cooling structure comprising:

[0006] Pump housing, wherein a drive space is provided inside the pump housing;

[0007] A driving unit, which is fixed to the driving space and separates the driving space;

[0008] The driving unit includes a stator, which is fixed to the side wall of the driving space. The stator has a flow channel inside to connect the driving spaces on both sides of the stator.

[0009] In one embodiment, the side of the stator facing the impeller and the drive space cavity wall together form a collection cavity, and the side of the stator away from the collection cavity and the drive space cavity wall together form a discharge cavity. The flow channel connects the collection cavity and the discharge cavity, with one side opening of the flow channel connecting to the collection cavity and the other side opening of the flow channel connecting to the discharge cavity.

[0010] In one embodiment, the yoke of the stator is in close contact with the drive space cavity wall, and the yoke is fixedly connected to the pump housing.

[0011] In one embodiment, the flow channel is disposed in the yoke of the stator.

[0012] In one embodiment, the flow channel extends linearly along the direction from the collection chamber to the discharge chamber.

[0013] In one embodiment, the flow channels are spirally distributed within the yoke.

[0014] In one embodiment, there are multiple flow channels, which are arranged at intervals along the outer contour of the yoke.

[0015] In one embodiment, the sum of the cross-sectional areas of the plurality of flow channels is greater than the minimum area required for the pump to reach its maximum flow rate, so that the flow velocity in one of the flow channels is less than or equal to a preset flow velocity.

[0016] In one embodiment, the cross-section of the flow channel is circular.

[0017] This utility model also proposes a fully enclosed pump, including a motor cooling structure.

[0018] The technical solution of this utility model involves setting a flow channel for refrigerant flow inside the stator and directly fixing the stator within the drive space. When the drive unit operates and pressurizes the refrigerant, the refrigerant directly passes through the flow channel on the stator and into the drive unit. The refrigerant flowing through the channel directly cools and dissipates heat from the stator and rotor. Since the stator is directly fixed to the inner wall of the drive space, the additional requirement of a motor housing is eliminated, reducing costs. Furthermore, the heat generated by the drive unit does not need to be conducted through the motor housing for dissipation, greatly improving heat dissipation efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the drive unit in one embodiment of the motor cooling structure provided by this utility model;

[0021] Figure 2 A cross-sectional view of an embodiment of the motor cooling structure provided by this utility model;

[0022] Figure 3 A side view of another embodiment of the motor cooling structure provided by this utility model;

[0023] Figure 4 for Figure 3 Sectional view at point AA.

[0024] Explanation of icon numbers:

[0025] 100. Motor cooling structure; 10. Stator; 20. Rotor; 30. Flow channel; 40. Pump housing; 50. Collection chamber; 60. Discharge chamber.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] The motor of a fully enclosed refrigerant pump is built into the pump body. The motor uses insulating materials compatible with the refrigerant, and the refrigerant is in direct contact with the motor. Typically, the motor stator requires a mounting housing for fixation. The refrigerant fluid, pressurized by the pump, is transported through a channel between the motor housing and the pump housing, simultaneously cooling the motor.

[0031] To ensure smooth fluid flow, a passage needs to be added to the motor housing, and sufficient space must be left between the motor housing and the pump housing for the fluid to pass through. This increases the complexity and cost of processing and assembling the motor housing, and the heat generated by the stator needs to be transferred to the refrigerant in the passage through the motor housing, which increases thermal resistance and affects heat dissipation.

[0032] This utility model proposes a motor cooling structure 100.

[0033] Please see Figure 1 In one embodiment of this utility model, the motor cooling structure includes:

[0034] Pump housing 40, wherein a drive space is provided inside the pump housing 40;

[0035] A driving unit, which is fixed to the driving space and separates the driving space;

[0036] The drive unit includes a stator 10, which is fixed to the side wall of the drive space. The stator 10 has a flow channel 30 to connect the drive spaces on both sides of the stator 10.

[0037] The operation of the pump body relies on the drive unit inside the pump body to pressurize and transmit the refrigerant. Therefore, it can be understood that the drive unit is the core of the pump body's operation, ensuring the stable operation of the drive unit so that the pump body can output stably.

[0038] It is understood that the drive space is designed to support the drive unit, and the drive unit is housed within the pump housing 40, meaning that the pump housing 40 completely encloses the drive unit to meet pressure resistance requirements.

[0039] In one embodiment, such as Figure 2 As shown, the drive unit is a motor, which includes a stator 10 and a rotor 20.

[0040] It is understood that the stator 10 is installed on the inner wall of the drive space and divides the drive space into two opposing spaces, and the rotor 20 is connected inside the stator 10.

[0041] Furthermore, the flow channel 30 connects to the drive space separated by the drive section, so that when the refrigerant transported by the pump body passes through the drive space and is output, the refrigerant passes through the flow channel 30 and then through the stator 10.

[0042] It is understood that the refrigerant flows through the flow channel 30 through the stator 10 so that the refrigerant can cool the stator 10 and the rotor 20.

[0043] The technical solution of this utility model involves providing a flow channel 30 for refrigerant flow within the stator 10 and directly fixing the stator 10 within the drive space. When the drive unit operates and pressurizes the refrigerant, the refrigerant directly passes through the flow channel 30 on the stator 10 and through the drive unit. The refrigerant passing through the flow channel 30 directly cools and dissipates heat from the stator 10 and the rotor. Since the stator 10 is directly fixed to the inner wall of the drive space, the additional requirement of a motor housing is eliminated, reducing costs. Furthermore, the heat generated by the drive unit does not need to be conducted through the motor housing for dissipation, greatly improving heat dissipation efficiency.

[0044] In one embodiment, the side of the stator 10 facing the impeller and the drive space cavity wall together form a collection cavity 50, and the side of the stator 10 away from the collection cavity 50 and the drive space cavity wall together form a discharge cavity 60. The flow channel 30 connects the collection cavity 50 and the discharge cavity 60. One side opening of the flow channel 30 connects to the collection cavity 50, and the other side opening of the flow channel 30 connects to the discharge cavity 60.

[0045] like Figure 3 and Figure 4 As shown, the collecting chamber 50 and the discharging chamber 60 are located on opposite sides of the driving part and are separated by the driving part.

[0046] It is understood that after the drive unit outputs power to draw the liquid into the collection chamber 50, the refrigerant flows into the discharge chamber 60 through the flow channel 30.

[0047] Furthermore, when the refrigerant passes through the flow channel 30, it directly exchanges heat with the stator 10, thereby dissipating heat from the drive unit and improving the efficiency of heat dissipation.

[0048] In one embodiment, the yoke of the stator 10 is in close contact with the drive space cavity wall, and the yoke is fixedly connected to the pump housing 40.

[0049] In one embodiment, the flow channel 30 is disposed on the yoke of the stator 10.

[0050] like Figure 2 As shown, the yoke of the stator 10 is directly mounted on the wall of the drive space cavity, and the flow channel 30 is provided on the yoke.

[0051] It is understandable that by directly fixing the yoke of the stator 10 to the cavity wall and allowing the refrigerant to flow directly through the flow channel 30 in the yoke of the stator 10, the need for an additional motor housing for refrigerant flow is eliminated. This not only optimizes the structure and reduces costs, but also allows for direct heat exchange within the flow channel 30 of the stator 10, greatly improving heat dissipation efficiency.

[0052] In one embodiment, the flow channel 30 extends linearly along the direction from the collection chamber 50 to the discharge chamber 60.

[0053] like Figure 1 as well as Figure 2 As shown, the flow channel 30 extends linearly within the stator 10.

[0054] It is understood that the flow channel 30 extends in a straight line so that the refrigerant can flow quickly from the collection chamber 50 into the discharge chamber 60, thereby improving the flow efficiency of the refrigerant. The refrigerant also flows within the stator 10 to facilitate heat dissipation when the drive chamber is in operation.

[0055] In another embodiment, the flow channels 30 are spirally distributed within the yoke.

[0056] It is understood that the flow channel 30 is spirally distributed within the yoke, that is, the spirally arranged flow channel 30 increases the heat exchange area between the refrigerant and the drive unit within the flow channel 30, thereby further improving the heat exchange efficiency.

[0057] In one embodiment, there are multiple flow channels 30, and the multiple flow channels 30 are arranged at intervals along the outer contour of the yoke.

[0058] It should be noted that during the operation of the pump, a large flow rate will be generated. If the flow rate of the flow channel within 30 units of time does not match the actual flow rate of the pump, it will affect the actual working efficiency of the pump.

[0059] Therefore, multiple flow channels 30 are provided, and multiple flow channels 30 are arranged at intervals along the outer contour of the yoke.

[0060] It is understood that multiple flow channels 30 are provided in the yoke of the stator 10. During the operation of the pump body, when the water flows from the collection chamber 50 to the discharge chamber 60, the multiple flow channels 30 can meet the flow requirements and ensure the working stability of the pump body.

[0061] Furthermore, the arrangement of multiple flow channels 30 increases the contact area between the refrigerant and the drive unit, thereby improving heat dissipation efficiency.

[0062] In one embodiment, the sum of the cross-sectional areas of the plurality of flow channels 30 is greater than the minimum area required for the pump to reach its maximum flow rate, so that the flow velocity within one of the flow channels 30 is less than or equal to a preset flow velocity.

[0063] In one embodiment, the cross-section of the flow channel 30 is circular.

[0064] like Figure 1 As shown, the flow channels 30 are distributed in the yoke of the stator for the flow of refrigerant.

[0065] To ensure the refrigerant flow rate within the flow channel 30 and to guarantee the heat exchange area between the refrigerant and the stator, the cross-section of the flow channel 30 is preferably circular. This avoids sharp edges that could affect the refrigerant flow within the flow channel 30, and the curved surface ensures the heat exchange area between the refrigerant and the stator, thereby improving the heat dissipation efficiency of the drive unit.

[0066] In another embodiment, the cross-section of the flow channel 30 is square or other shapes.

[0067] It is understandable that designing the cross-section of the flow channel 30 to be square or other shapes can facilitate the processing of the flow channel 30 on the stator 10 and improve the processing efficiency of the stator 10.

[0068] This utility model also proposes a fully enclosed pump, which includes the motor cooling structure. The specific structure of the motor cooling structure is as described in the above embodiments. Since this fully enclosed pump adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0069] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An electric motor cooling structure characterized by comprising: include: Pump housing, wherein a drive space is provided inside the pump housing; A driving unit, which is fixed to the driving space and separates the driving space; The driving unit includes a stator, which is fixed to the side wall of the driving space. The stator has a flow channel inside to connect the driving spaces on both sides of the stator.

2. The motor cooling structure as described in claim 1, characterized in that, The side of the stator facing the impeller and the drive space cavity wall together form a collection cavity, and the side of the stator away from the collection cavity and the drive space cavity wall together form a discharge cavity. The flow channel connects the collection cavity and the discharge cavity. One side opening of the flow channel connects to the collection cavity, and the other side opening of the flow channel connects to the discharge cavity.

3. The motor cooling structure as described in claim 2, characterized in that, The yoke of the stator is in close contact with the wall of the drive space cavity, and the yoke is fixedly connected to the pump housing.

4. The motor cooling structure as described in claim 3, characterized in that, The flow channel is located in the yoke of the stator.

5. The motor cooling structure as described in claim 4, characterized in that, The flow channel extends in a straight line from the collection chamber to the discharge chamber.

6. The motor cooling structure as described in claim 4, characterized in that, The flow channels are spirally distributed within the yoke.

7. The motor cooling structure as described in claim 3, characterized in that, The number of flow channels is multiple, and the multiple flow channels are arranged at intervals along the outer contour of the yoke.

8. The motor cooling structure as described in claim 7, characterized in that, The sum of the cross-sectional areas of the plurality of flow channels is greater than the minimum area required for the pump to reach its maximum flow rate, so that the flow velocity in one of the flow channels is less than or equal to a preset flow velocity.

9. The motor cooling structure as described in any one of claims 1 to 8, characterized in that, The cross-section of the flow channel is circular.

10. A fully enclosed pump, characterized in that, Includes the motor cooling structure as described in any one of claims 1 to 9.

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