Motor heat dissipation device, motor and air conditioner

Abstract

The utility model discloses a motor heat dissipation device, a motor and an air conditioner. A stator of a motor is formed by sequentially splicing a plurality of stator iron cores along the circumferential direction, and the motor heat dissipation device comprises a molding compound used for fastening the plurality of stator iron cores; and the condenser pipe is embedded in the molding compound, the condenser pipe is connected to an air conditioner refrigerant circulation loop so as to dissipate heat of the motor by using a refrigerant, and the refrigerant flowing along the condenser pipe flows through each stator iron core. The condenser pipe is embedded in the molding compound around the stator core, so that heat can be efficiently absorbed and conducted, a heat conduction path is shortened, heat dissipation efficiency is improved, the stator core body is not damaged, normal work of the motor is not affected, the condenser pipe does not occupy the space around the stator core, interference of the condenser pipe on winding installation is avoided, and the service life of the motor is prolonged. Disassembly, assembly and maintenance are convenient; the full contact between the condenser pipe and the stator is ensured, the heat dissipation efficiency and heat dissipation effect of the motor are improved, and the operation performance and reliability of the motor under a high-load condition are ensured.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a motor heat dissipation device, a motor, and an air conditioner. Background Technology

[0002] In the current context of industrial and intelligent manufacturing, electric motors (such as brushless DC motors) are facing increasing demands for high performance and high reliability as key drive components in industries and other fields. Especially in terms of high power density, high efficiency, quiet operation, and long lifespan, the application areas of electric motors are constantly expanding, placing higher demands on motor temperature management technology.

[0003] Currently, the common practice is to use a fan to drive airflow to cool the motor. However, this method of motor cooling has low heat dissipation efficiency, especially under high load or high temperature conditions. It also produces a lot of noise, and the fan needs to be cleaned and maintained regularly.

[0004] There is currently no effective solution to the problem of low heat dissipation efficiency of motors in existing technologies. Utility Model Content

[0005] This utility model provides a motor cooling device, a motor, and an air conditioner to at least solve the problem of low motor cooling efficiency in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a motor heat dissipation device, wherein the stator of the motor is composed of multiple stator cores sequentially spliced ​​along the circumference, and the motor heat dissipation device includes:

[0007] Molding compound, used to fasten the plurality of stator cores;

[0008] A condenser tube is embedded in the molding compound. The condenser tube is connected to the air conditioning refrigerant circulation loop to dissipate heat from the motor using the refrigerant. The refrigerant flowing along the condenser tube flows through each stator core.

[0009] Optionally, the condenser tube includes a first part and a second part, wherein the first part is embedded in the plastic sealant inside the stator and the second part is embedded in the plastic sealant outside the stator.

[0010] Optionally, the first part is connected to the second part, the refrigerant inlet of the condenser is located in the first part and the refrigerant outlet of the condenser is located in the second part, or the refrigerant inlet of the condenser is located in the second part and the refrigerant outlet of the condenser is located in the first part.

[0011] Optionally, the first part and the second part are not connected, and the first part and the second part are connected in parallel to the air conditioning refrigerant circulation loop.

[0012] Optionally, an adjustable valve is installed at the refrigerant inlet of the condenser tube.

[0013] Optionally, the refrigerant inlet and refrigerant outlet of the condenser tube are both connected to the condenser outlet in the air conditioning refrigerant circulation loop.

[0014] Optionally, the condenser tube is serpentine or annular.

[0015] Optionally, the motor cooling device further includes a temperature sensor and a control chip;

[0016] The temperature sensor includes at least one of the following:

[0017] The first temperature sensor is installed at the stator to detect the stator temperature;

[0018] The second temperature sensor is installed at the rotor to detect the rotor temperature;

[0019] The third temperature sensor is installed in the motor bearing to detect the bearing temperature;

[0020] The fourth temperature sensor is installed in the motor housing and is used to detect the housing temperature;

[0021] The fifth temperature sensor is installed around the motor to detect the ambient temperature of the motor's operating environment.

[0022] The control chip is connected to the temperature sensor and is used to control the refrigerant flow rate and / or refrigerant temperature of the condenser tube based on at least one of the stator temperature, the rotor temperature, the bearing temperature, the housing temperature, and the motor operating environment temperature.

[0023] This utility model embodiment also provides an electric motor, including: the electric motor heat dissipation device described in this utility model embodiment.

[0024] This utility model embodiment also provides an air conditioner, including: the motor heat dissipation device described in this utility model embodiment.

[0025] By applying the technical solution of this utility model, the condenser tube is embedded in the plastic sealant surrounding the stator core, close to the stator core and stator windings. This allows for more efficient heat absorption and conduction, shortening the heat conduction path and improving heat dissipation efficiency. Furthermore, it does not damage the stator core itself, does not affect the normal operation of the motor, and does not occupy space around the stator core, avoiding interference with winding installation. It also facilitates disassembly and maintenance. The condenser tube is connected to the air conditioning refrigerant circulation loop to utilize the refrigerant for motor cooling. The refrigerant flowing along the condenser tube passes through each stator core, ensuring full contact between the condenser tube and the stator, improving the motor's heat dissipation efficiency and effect, and guaranteeing the motor's performance and reliability under high load conditions. Attached Figure Description

[0026] Figure 1A This is a schematic diagram of the motor heat dissipation device provided in an embodiment of the present utility model;

[0027] Figure 1B This is a top view schematic diagram of the motor heat dissipation device provided in an embodiment of the present utility model;

[0028] Figure 2A and Figure 2B These are schematic diagrams of the condenser tube from different perspectives provided in the embodiments of this utility model;

[0029] Figure 3 This is a three-dimensional schematic diagram of the motor heat dissipation device provided in this embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of motor temperature control provided in an embodiment of the present invention;

[0031] Explanation of reference numerals in the attached figures:

[0032] Stator core 10, molding compound 20, condenser tube 30, first part 31, second part 32, port 33, temperature sensor 40, first temperature sensor 41, second temperature sensor 42, third temperature sensor 43, fourth temperature sensor 44, fifth temperature sensor 45, control chip 50. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that the terms "first," "second," etc., used in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0036] The optional embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] Currently, the motor is cooled by using a fan to drive airflow. However, this method of motor cooling has low efficiency, especially under high load or high temperature conditions. It is also noisy and the fan needs to be cleaned and maintained regularly.

[0039] To address the aforementioned problem of low heat dissipation efficiency in motors, this embodiment provides a motor heat dissipation device applicable to various motors, such as motors used in air conditioners or motors used in other structures.

[0040] like Figure 1A and Figure 1B As shown, the stator of the motor is composed of multiple stator cores 10 sequentially spliced ​​along the circumference. The multiple stator cores 10 are fastened together by a molding compound 20, making the stator round with a stator cavity in the middle. The molding compound 20 is used to fasten the multiple stator cores 10, and is present on both the inner side (i.e., the stator cavity side) and the outer side of the stator.

[0041] The condenser tube 30 is embedded in the molding compound 20. The condenser tube 30 is connected to the air conditioning refrigerant circulation loop to dissipate heat from the motor using the refrigerant. The refrigerant flowing along the condenser tube 30 passes through each stator core 10. In other words, refrigerant drawn from the air conditioning refrigerant circulation loop can flow through the condenser tube 30, and the refrigerant used to dissipate heat from the motor returns to the air conditioning refrigerant circulation loop, thus realizing the recycling of the refrigerant.

[0042] The air conditioning refrigerant circulation loop refers to a loop mainly composed of a compressor, condenser, throttling element, and evaporator. The compressor discharges high-temperature, high-pressure gaseous refrigerant, which enters the condenser to release heat. The refrigerant is cooled into a liquid state, and after being throttled by the throttling element, it enters the evaporator to absorb heat, becoming gaseous refrigerant again and returning to the compressor, completing one refrigerant cycle. Refrigerant can be drawn from the liquid refrigerant position in the air conditioning refrigerant circulation loop to the condenser pipe 30 to effectively dissipate heat from the motor using this relatively low-temperature refrigerant. The specific location of the condenser pipe 30 in the air conditioning refrigerant circulation loop can be selected according to actual conditions; this embodiment does not impose any restrictions on this.

[0043] The condenser tube 30 is embedded in the molding compound 20, rather than being directly installed in the stator core 10. This avoids damaging the stator core and affecting the normal operation of the motor. Furthermore, the condenser tube 30 does not occupy the space around the stator core, facilitating the installation of the stator windings and preventing interference with winding installation. It also optimizes space utilization, improving the overall space utilization rate of the motor and making the motor design more compact, meeting the needs of high power density and miniaturization. If the condenser tube 30 were directly installed in the stator core 10, replacing or repairing the condenser tube 30 would require complex disassembly and assembly steps. However, in this embodiment, the condenser tube 30 is embedded in the molding compound 20. When replacing or repairing the condenser tube 30, it is not necessary to disassemble the stator core, simplifying the maintenance process, reducing maintenance costs and time, and facilitating disassembly and maintenance.

[0044] The molding compound 20 typically has good thermal conductivity, enabling the condenser tube 30 to quickly transfer heat to the outside, thereby improving overall heat dissipation efficiency. Furthermore, the tight bond between the condenser tube 30 and the molding compound 20 reduces thermal resistance during heat conduction, further improving heat transfer efficiency. If the condenser tube 30 were directly installed in the stator core 10, the structural limitations of the stator core itself might increase thermal resistance, thus reducing heat dissipation performance.

[0045] Molding compound 20 is generally low in cost and easy to process, making it suitable for mass production. Embedding the condenser tube 30 in molding compound 20 results in lower material costs and a simpler manufacturing process. Furthermore, the shape, size, and position of the condenser tube can be flexibly adjusted according to different motor design requirements, adapting to various motor structures and exhibiting strong adaptability.

[0046] The refrigerant flowing along the condenser tube 30 passes through each stator core 10. That is, the arrangement of the condenser tube 30 in the molding compound 20 can cover each stator core 10, ensuring that the condenser tube and the stator are in full contact, improving heat exchange efficiency, and thus improving heat dissipation efficiency and heat dissipation effect.

[0047] In this embodiment, the condenser tube 30 is embedded in the plastic sealant 20 surrounding the stator core 10, close to the stator core and stator windings. This allows for more efficient heat absorption and conduction, shortening the heat conduction path and improving heat dissipation efficiency. Furthermore, it does not damage the stator core and does not affect the normal operation of the motor. The condenser tube 30 does not occupy space around the stator core, avoiding interference with winding installation and facilitating disassembly and maintenance. The condenser tube 30 is connected to the air conditioning refrigerant circulation loop to utilize the refrigerant for motor cooling. The refrigerant flowing along the condenser tube 30 passes through each stator core 10, ensuring full contact between the condenser tube and the stator, improving motor heat dissipation efficiency and effectiveness, and guaranteeing the motor's performance and reliability under high load conditions.

[0048] The condenser tube 30 can be made of a high thermal conductivity material and is tightly integrated with the internal structure of the motor, which can quickly absorb and dissipate the heat generated during motor operation, thereby improving heat exchange efficiency.

[0049] like Figure 1A and Figure 1B As shown, the condenser tube 30 includes a first part 31 and a second part 32. The first part 31 is embedded in the plastic sealant on the inner side of the stator, and the second part 32 is embedded in the plastic sealant on the outer side of the stator. In this embodiment, condenser tubes are provided in the plastic sealant on both the inner and outer sides of the stator, so that the condenser tubes have more sufficient contact with the stator, thereby helping to improve the heat dissipation efficiency and heat dissipation effect of the motor.

[0050] The condenser tube 30 has ports 33 at both ends for refrigerant to flow in and out. Ports 33 specifically include a refrigerant inlet and a refrigerant outlet.

[0051] In an optional embodiment, the first portion 31 and the second portion 32 are connected, with the refrigerant inlet of the condenser pipe 30 located in the first portion 31 and the refrigerant outlet of the condenser pipe 30 located in the second portion 32; or, the refrigerant inlet of the condenser pipe 30 is located in the second portion 32 and the refrigerant outlet of the condenser pipe 30 is located in the first portion 31. Figure 2A and Figure 2B As shown, the entire condenser tube formed by the connection of the first part 31 and the second part 32 includes two ports, one of which serves as a refrigerant inlet and the other as a refrigerant outlet. In this embodiment, an entire condenser tube is simultaneously embedded in the plastic sealant on both the inner and outer sides of the stator, resulting in a simple structure that is easy to implement.

[0052] In an optional embodiment, the first part 31 and the second part 32 may not be connected. The first part 31 and the second part 32 are connected in parallel to the air conditioning refrigerant circulation loop. That is, a condenser pipe is embedded in the plastic sealant on the inner side of the stator and the plastic sealant on the outer side of the stator, respectively. These two condenser pipes have their own refrigerant inlet and refrigerant outlet. In this embodiment, the different condenser pipes can simultaneously dissipate heat on both the inner and outer sides of the stator, resulting in better heat dissipation.

[0053] An adjustable valve is installed at the refrigerant inlet of the condenser pipe 30. If the motor does not require cooling, the valve is closed; if cooling is required, the valve is opened. During motor cooling, if increased cooling capacity is needed, the valve opening is increased; if decreased cooling capacity is needed, the valve opening is decreased. This embodiment, through the valve at the condenser pipe inlet, can promptly cool the motor, increase cooling capacity according to the actual motor conditions to meet cooling needs, and decrease cooling capacity according to the actual motor conditions to avoid energy waste, maximizing energy efficiency and improving the precision of heat dissipation control.

[0054] If the first part 31 and the second part 32 are not connected, for the parallel first part 31 and the second part 32, a main valve can be set at the two refrigerant inlets to control the total refrigerant flow and achieve overall control. Alternatively, valves can be set for each of the two lines to control the refrigerant flow of each line separately according to the actual situation, thereby achieving more precise temperature control.

[0055] Preferably, both the refrigerant inlet and outlet of the condenser pipe 30 are connected to the condenser outlet in the air conditioning refrigerant circulation loop. The refrigerant at the condenser outlet has completed most of the condensation process and is in a low-temperature, high-pressure liquid state. This state of refrigerant allows it to more effectively absorb heat from the motor, improving heat dissipation efficiency and refrigerant utilization. Alternatively, the condenser pipe can be drawn from other locations in the air conditioning refrigerant circulation loop, as long as the drawn refrigerant can effectively dissipate heat from the motor. For example, a branch line can be drawn between the four-way valve and the gas-liquid separator as the condenser pipe.

[0056] The condenser tube 30 can be serpentine or annular. By using a serpentine or annular condenser tube 30 to surround the stator, full contact with the heat source can be ensured, which can accelerate heat conduction and help improve the heat dissipation efficiency of the motor.

[0057] In practical implementation, the size, shape and specific installation position of the condenser tube can be customized according to the specific size and structure of the motor stator to ensure good compatibility between the condenser tube and the stator and reduce thermal resistance.

[0058] Figure 3 This is a three-dimensional schematic diagram of the motor heat dissipation device provided in an embodiment of this utility model. Figure 3 The shape and installation position of the condenser tube 30 can be clearly seen.

[0059] To achieve high-precision temperature control, the motor heat dissipation device may also include a temperature sensor 40 and a control chip 50, such as... Figure 4As shown, the control chip 50 is connected to the temperature sensor 40. The temperature sensor 40 can detect at least one of the stator temperature, rotor temperature, bearing temperature, casing temperature, and motor operating ambient temperature. The control chip 50 is used to control the refrigerant flow rate and / or refrigerant temperature of the condenser tube based on at least one of the stator temperature, rotor temperature, bearing temperature, casing temperature, and motor operating ambient temperature. This embodiment, through the arrangement of temperature sensors, can comprehensively monitor the thermal state of the motor, and thus adjust the cooling capacity of the condenser tube in a timely manner according to the actual situation of the motor, keeping the motor within a suitable operating temperature range, avoiding damage caused by excessive motor temperature, and achieving high-precision temperature control.

[0060] Temperature sensor 40 includes at least one of the following:

[0061] The first temperature sensor 41 is installed in the stator (specifically, it can be installed near the stator core and stator windings) to detect the stator temperature;

[0062] The second temperature sensor 42 is installed at the rotor (specifically, it can be embedded inside the rotor or near the bearing area of ​​the rotor) to detect the rotor temperature;

[0063] The third temperature sensor 43 is installed in the motor bearing to detect the bearing temperature; this allows for timely detection of the bearing temperature and appropriate heat dissipation measures to prevent bearing damage due to overheating.

[0064] The fourth temperature sensor 44 is installed on the motor housing to detect the housing temperature; in fact, multiple fourth temperature sensors can be set and arranged in different positions on the motor housing to comprehensively reflect the overall heat dissipation of the motor.

[0065] The fifth temperature sensor 45 is installed around the motor to detect the ambient temperature of the motor's operating environment.

[0066] The first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43, the fourth temperature sensor 44, and the fifth temperature sensor 45 mentioned above are all electrically connected to the control chip 50.

[0067] By using a multi-point temperature sensor network, the actual temperature of the motor can be obtained more comprehensively, thus enabling more precise motor temperature control.

[0068] In practical implementation, high-precision temperature sensors can be used to ensure the accuracy of temperature data. In addition, the temperature sensors need to have good anti-interference capabilities and long-term stability to meet the operating requirements of motors under complex working conditions.

[0069] Temperature sensor 40 collects temperature data at the corresponding location in real time and transmits it to control chip 50, for example, via CAN bus or wireless communication module. Data transmission can employ a redundant design to ensure data integrity and real-time performance. After receiving the temperature data from temperature sensor 40, control chip 50 performs comprehensive analysis. For example, it can determine the motor temperature change trend by analyzing the temperature changes at various locations over time, and it can also assess the motor's thermal load by combining the motor's load and ambient temperature. Based on the detected temperature data and relevant temperature thresholds, it dynamically adjusts the cooling capacity parameters of condenser 30, such as adjusting the refrigerant flow rate and / or refrigerant temperature within condenser 30. Specifically, increasing the refrigerant flow rate and / or decreasing the refrigerant temperature within condenser 30 can enhance its cooling capacity, while decreasing the refrigerant flow rate and / or increasing the refrigerant temperature within condenser 30 can reduce its cooling capacity.

[0070] During motor operation, temperature data related to the motor is monitored in real time, and the condenser 30 is used to control whether to activate refrigerant circulation and adjust its cooling capacity. Specifically, control can be based on a single temperature, such as any temperature detected by the aforementioned temperature sensor; or multiple temperatures can be combined for control, for example, calculating the motor temperature rise by measuring the difference between the stator temperature and the ambient temperature, and then controlling the motor based on this temperature rise. Alternatively, the valve at the refrigerant inlet of the condenser 30 can be controlled based on the motor speed. The motor speed reflects the motor load; for example, a high motor speed indicates high motor heat generation, in which case the valve at the refrigerant inlet of the condenser 30 can be opened. Conversely, a low motor speed can reduce the valve opening to decrease the cooling capacity of the condenser 30.

[0071] The following examples illustrate high-precision temperature control for motor heat dissipation. However, it is worth noting that these examples are only for better illustration of this application and do not constitute an undue limitation on this application.

[0072] Example 1: When the motor starts, the stator temperature T gradually increases as the motor runs. During motor operation, the stator temperature T is monitored in real time. When T ≥ T1 (T1 represents the first temperature threshold, e.g., T1 = 120℃), the valve at the refrigerant inlet of the condenser tube 30 is opened (at this time, the valve can be opened to the default opening degree) to start the refrigerant circulation in the condenser tube. Further control is performed based on the change in stator temperature T: If T remains unchanged or continues to rise, it means that the current cooling capacity cannot suppress the motor temperature rise. The valve opening degree is increased to enhance the cooling capacity of the condenser tube 30 and quickly reduce the motor temperature; if T decreases and T2 ≤ T < T1 (T2 represents the second temperature threshold, e.g., T2 = 100℃), the current valve opening degree is kept unchanged. At this time, the motor is in the ideal operating temperature range and can operate stably and efficiently; if T drops below T2, the valve opening degree is reduced to reduce the cooling capacity of the condenser tube 30, avoid energy waste, and maximize energy efficiency.

[0073] Example 2: During motor operation, when the temperature rise at a certain point on the motor is detected to be close to the first temperature rise threshold (e.g., 50K), the valve opening is automatically increased to enhance the cooling capacity of the condenser 30 and improve the cooling effect. When the temperature rise at that point is detected to be lower than the second temperature rise threshold (e.g., 30K), the valve opening is automatically decreased to reduce the cooling capacity of the condenser 30, avoid energy waste, and maximize energy efficiency.

[0074] Example 3: Set the maximum safe operating temperature rise threshold for the motor to A = 62K. When any temperature rise detected by the temperature sensors approaches A, the valve automatically opens to initiate refrigerant circulation in the condenser coil 30. If the valve is already open, increase the valve opening to enhance cooling capacity. Under low load conditions (e.g., when the motor speed is less than 1 / 3 of the rated motor speed, or when the ambient temperature of the motor operating environment is less than 7°C), automatically decrease the valve opening to reduce cooling capacity, avoid energy waste, and maximize energy efficiency.

[0075] This embodiment integrates a condenser tube into the stator molding compound and combines it with multi-dimensional temperature detection to intelligently and dynamically adjust the operating status and cooling capacity of the condenser tube. This significantly improves the motor's heat dissipation efficiency, reliability, and intelligence level, ensuring that the motor stator operates within the ideal operating temperature range. It can provide high-precision temperature control under high load conditions, realize intelligent dynamic thermal management of the motor, and provide strong temperature support for the high-performance operation and energy efficiency of the motor.

[0076] Example 2

[0077] This embodiment provides a motor, including the motor heat dissipation device described in the above embodiment.

[0078] Integrating the aforementioned motor cooling device into the motor can improve the motor's heat dissipation efficiency, enhance thermal management under high load conditions, and achieve precise and intelligent temperature control, thereby extending the motor's lifespan and improving its overall performance. The condenser tubes are installed in the stator encapsulation material, which allows for better temperature control of the stator core and windings, improving heat capture efficiency, while not damaging the stator's structure and facilitating the installation of the stator windings.

[0079] Example 3

[0080] This embodiment provides an air conditioner, including the motor cooling device described in the above embodiment.

[0081] Integrating the aforementioned motor cooling device into the air conditioner allows for convenient cooling of the motor and improves its cooling efficiency.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat dissipation device for an electric motor, wherein the stator of the motor is composed of multiple stator cores sequentially spliced ​​together circumferentially, characterized in that, The motor cooling device includes: Molding compound, used to fasten the plurality of stator cores; A condenser tube is embedded in the molding compound. The condenser tube is connected to the air conditioning refrigerant circulation loop to dissipate heat from the motor using the refrigerant. The refrigerant flowing along the condenser tube flows through each stator core.

2. The motor cooling device according to claim 1, characterized in that, The condenser tube includes a first part and a second part, the first part being embedded in the plastic sealant inside the stator, and the second part being embedded in the plastic sealant outside the stator.

3. The motor cooling device according to claim 2, characterized in that, The first part is connected to the second part, and the refrigerant inlet of the condenser is located in the first part and the refrigerant outlet of the condenser is located in the second part, or the refrigerant inlet of the condenser is located in the second part and the refrigerant outlet of the condenser is located in the first part.

4. The motor cooling device according to claim 2, characterized in that, The first part and the second part are not connected, and the first part and the second part are connected in parallel to the air conditioning refrigerant circulation loop.

5. The motor cooling device according to claim 1, characterized in that, The refrigerant inlet of the condenser is equipped with an adjustable valve.

6. The motor cooling device according to claim 1, characterized in that, The refrigerant inlet and refrigerant outlet of the condenser tube are both connected to the condenser outlet in the air conditioning refrigerant circulation loop.

7. The motor cooling device according to any one of claims 1 to 6, characterized in that, The condenser tube is either serpentine or ring-shaped.

8. The motor cooling device according to any one of claims 1 to 6, characterized in that, The motor cooling device also includes a temperature sensor and a control chip; The temperature sensor includes at least one of the following: The first temperature sensor is installed at the stator to detect the stator temperature; The second temperature sensor is installed at the rotor to detect the rotor temperature; The third temperature sensor is installed in the motor bearing to detect the bearing temperature; The fourth temperature sensor is installed in the motor housing and is used to detect the housing temperature; The fifth temperature sensor is installed around the motor to detect the ambient temperature of the motor's operating environment. The control chip is connected to the temperature sensor and is used to control the refrigerant flow rate and / or refrigerant temperature of the condenser tube based on at least one of the stator temperature, the rotor temperature, the bearing temperature, the housing temperature, and the motor operating environment temperature.

9. An electric motor, characterized in that, include: The motor cooling device according to any one of claims 1 to 8.

10. An air conditioner, characterized in that, include: The motor cooling device according to any one of claims 1 to 8.

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