Contact type heat dissipation device and motor system

Abstract

The utility model relates to a contact type heat dissipation device and a motor system.The contact type heat dissipation device comprises a gasification jacket, an exhaust chamber, a vacuum pump, a liquid pump, a liquid storage chamber, a nozzle, a temperature sensor, a controller and a plurality of connecting pipelines, the gasification jacket is arranged on the peripheral side of a stator winding shell in a sleeving mode, and the nozzle is arranged on the side wall of the gasification jacket; the temperature sensor is arranged on the surface of the stator winding shell; when the temperature sensor detects that the temperature of the stator winding shell is greater than or equal to a first preset temperature value, the controller controls the liquid pump to pump a refrigerant into the nozzle from the liquid storage chamber, and the refrigerant is sprayed on the surface of the stator winding shell through the nozzle; the vacuum pump communicates with the gasification jacket through the exhaust chamber, and the controller controls the vacuum pump to discharge the gaseous refrigerant in the exhaust chamber to the external space. According to the contact type heat dissipation device and the motor system provided by the invention, the problem of low heat dissipation efficiency of a liquid cooling plate contact type heat dissipation or air cooling heat dissipation mode is solved.

Description

Technical Field

[0001] This application relates to the field of motor heat dissipation devices, and in particular to a contact-type heat dissipation device and motor system. Background Technology

[0002] With the rapid development of motor technology towards higher power density, miniaturization, and higher efficiency, the heat generated during motor operation has also increased significantly. In particular, the stator winding, as one of the main sources of loss, has seen its temperature rise become a key bottleneck restricting the improvement of motor performance and reliability. Under high-speed, high-load, or high-frequency conditions, the stator winding temperature may rise sharply due to the combined effects of resistance loss (copper loss), eddy current loss, and insulation dielectric loss, leading to thermal aging of the insulation material, magnet demagnetization (in permanent magnet motors), and even winding short-circuit failure. Therefore, research on efficient heat dissipation technology is of great significance for ensuring safe motor operation, extending lifespan, and optimizing energy efficiency.

[0003] In existing technologies, liquid-cooled plate contact cooling or air cooling is commonly used to dissipate heat from the stator windings of a motor. In liquid-cooled plate cooling, the limited surface flatness of the material results in a significant gap between the liquid-cooled plate and the stator winding housing. This causes the effective contact area between the liquid-cooled plate and the stator winding housing to be much smaller than the theoretical contact area, thus limiting the heat transfer efficiency between the liquid-cooled plate and the stator winding. In air cooling, due to the low specific heat capacity of air, air cooling is only suitable for low-power motors. Utility Model Content

[0004] Therefore, it is necessary to provide a contact-type heat dissipation device and motor system to solve the problem of low heat dissipation efficiency in existing liquid-cooled plate contact heat dissipation or air-cooled heat dissipation methods.

[0005] The contact heat dissipation device provided in this application includes a vaporization jacket, an exhaust chamber, a vacuum pump, a liquid pump, a liquid storage chamber, a nozzle, a temperature sensor, a controller, and several connecting pipes. The vaporization jacket is fitted onto the outer periphery of the stator winding shell, the nozzle is disposed on the side wall of the vaporization jacket, the temperature sensor is disposed on the surface of the stator winding shell, and the nozzle is connected to the liquid storage chamber through the connecting pipes and the liquid pump. When the temperature sensor measures that the temperature at the stator winding shell is greater than or equal to a first preset temperature value, the controller can control the liquid pump to pump refrigerant from the liquid storage chamber into the nozzle, and spray it onto the surface of the stator winding shell through the nozzle, so that the refrigerant absorbs heat and vaporizes on the surface of the stator winding shell. The vacuum pump is connected to the vaporization jacket through the exhaust chamber, and the controller can control the vacuum pump to discharge the gaseous refrigerant in the exhaust chamber to the external space.

[0006] In one embodiment, the contact heat dissipation device further includes an intake valve, which is located at the end of the vaporization jacket away from the exhaust chamber. When the vacuum pump's running time is less than a preset time, the controller can control the intake valve to remain closed. When the vacuum pump's running time is greater than or equal to the preset time, the controller can control the intake valve to open.

[0007] In one embodiment, the flow area of ​​the vaporization jacket tends to increase along the direction from the intake valve to the exhaust chamber.

[0008] In one embodiment, the stator winding housing has a plurality of turbulence protrusions arranged along the air intake valve to the exhaust chamber on the side wall near the vaporization jacket. One end of the turbulence protrusion is connected to the stator winding housing, and the other end protrudes toward the vaporization jacket. The vaporization jacket is attached to the stator winding housing and to the outer wall of the turbulence protrusion.

[0009] In one embodiment, when the temperature value measured by the temperature sensor is less than a second preset temperature value, the controller can control the liquid pump and vacuum pump to shut down, and the first preset temperature value is greater than the second preset temperature value.

[0010] In one embodiment, the contact heat dissipation device further includes an annular liquid distribution pipe arranged along the circumference of the vaporization jacket and sequentially connected to multiple nozzles. The liquid storage chamber is connected to the liquid distribution pipe via a connecting pipe and a liquid pump.

[0011] In one embodiment, there are multiple nozzles, which are spaced apart along the circumferential direction of the vaporization jacket.

[0012] In one embodiment, the vaporization jacket is provided with a liquid wicking structure on the inner wall near the stator winding housing, the liquid wicking structure being able to adsorb liquid refrigerant.

[0013] In one embodiment, the exhaust chamber cover is disposed on one side of the vaporization jacket and the stator winding, and is fixedly connected to the vaporization jacket.

[0014] This application also provides a motor system, which includes a drive motor and a contact-type heat dissipation device as described in any of the above embodiments. The drive motor has stator windings, and the contact-type heat dissipation device is used to cool the stator windings.

[0015] Compared with the prior art, the contact heat dissipation device and motor system provided in this application have the following two functions: First, by creating a negative pressure environment, the boiling point of the refrigerant can be reduced, thereby accelerating the vaporization of the refrigerant (the phase change process of the refrigerant itself absorbs a large amount of heat); Second, the vacuum pump can create a pressure difference between the exhaust chamber and the vaporization jacket, thereby accelerating the entry of gaseous refrigerant into the exhaust chamber.

[0016] Compared to liquid cooling plates, which rely on solid-to-solid contact conduction and are limited by surface processing precision, this solution eliminates contact thermal resistance through direct contact phase change heat transfer. Compared to air-cooled systems, whose heat dissipation capacity is limited by air properties, this solution utilizes the latent heat of phase change to enhance the heat-carrying capacity per unit mass of refrigerant. Furthermore, traditional spray cooling tends to form a liquid film on the surface, hindering heat transfer; this solution combines vacuum extraction to promptly remove gaseous refrigerant, maintaining a highly efficient vaporization process.

[0017] Through the above technical solution, this application realizes active phase change cooling of the stator winding shell, increases the refrigerant contact area by atomized spraying, and promotes continuous vaporization by combining a vacuum environment, effectively solving the problems of high contact thermal resistance and low heat exchange efficiency of traditional heat dissipation methods, and is particularly suitable for the transient thermal management needs of high power density motors. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a contact heat dissipation device according to an embodiment of this application;

[0020] Figure 2 A partial cross-sectional view of a contact heat dissipation device according to an embodiment of this application;

[0021] Figure 3 A schematic diagram of the structure of a contact heat dissipation device according to another embodiment of this application.

[0022] Reference numerals: 100, vaporization jacket; 200, exhaust chamber; 210, exhaust port; 300, vacuum pump; 400, liquid pump; 500, liquid storage chamber; 600, nozzle; 700, connecting pipeline; 800, air inlet valve; 900, liquid suction core structure; 1000, liquid distribution pipe; 2000, stator winding. Detailed Implementation

[0023] Please see Figures 1-3In one embodiment, the contact heat dissipation device includes a vaporization jacket 100, an exhaust chamber 200, a vacuum pump 300, a liquid pump 400, a liquid storage chamber 500, a nozzle 600, a temperature sensor (not shown), a controller (not shown), and several connecting pipes 700. The vaporization jacket 100 is tightly fitted around the outer periphery of the stator winding 2000 housing. The stator winding 2000 includes a winding body and a housing. The housing is disposed on the outer periphery of the winding body to protect it. The nozzle 600 is disposed on the side wall of the vaporization jacket 100 away from the stator winding 2000 housing (i.e., the outer ring side wall) or on the middle side wall of the vaporization jacket 100. Specifically, the nozzle 600 is sealed through the side wall of the vaporization jacket 100, or the connecting pipes 700 are sealed through the side wall of the vaporization jacket 100.

[0024] The vaporization jacket 100 refers to the sealed cavity surrounding the stator winding 2000 shell. It can be made of stainless steel or aluminum alloy and has a ring-shaped structure. Its inner surface forms a separate phase change space, or the inner surface of the vaporization jacket 100 and the stator shell together form a phase change space. The nozzle 600 refers to the atomizing spray device, which can be a pressure-type or ultrasonic nozzle, evenly distributed along the circumference of the jacket to ensure coverage. The temperature sensor refers to a contact-type temperature sensing element, such as a thermocouple or resistance temperature detector, mounted on the highest temperature area of ​​the stator winding 2000 shell. The controller refers to a control unit with logic judgment functions, such as a PLC or microprocessor, which regulates the pump's start and stop through a PID algorithm. The connecting pipeline 700 refers to a pressure-resistant fluid delivery pipeline, which can be made of metal hoses or reinforced plastic tubes for multi-directional connections. The vacuum pump 300 refers to a gas extraction device, such as a rotary vane vacuum pump 300, which controls the exhaust rate through frequency conversion.

[0025] like Figures 1-3 As shown, there are multiple nozzles 600, which are arranged at intervals along the circumference of the vaporization jacket 100. That is, the multiple nozzles 600 are distributed in a ring array around the axis of the stator winding 2000 housing. The circumferential interval arrangement means that the multiple nozzles 600 are evenly distributed around the central axis of the vaporization jacket 100. This can be achieved by setting mounting holes around the circumference of the vaporization jacket 100; for example, the interval angle between adjacent nozzles 600 can be 60 degrees or 120 degrees. Because the nozzles 600 are spaced apart along the circumference of the vaporization jacket 100, the refrigerant is simultaneously sprayed onto different areas of the stator winding 2000 housing surface, forming a continuous liquid coating layer. The liquid refrigerant rapidly vaporizes after absorbing heat, and the latent heat of phase change generated during the vaporization process is efficiently carried away. Compared to a single-nozzle 600 structure, the spaced arrangement of multiple nozzles 600 significantly increases the refrigerant coverage area, avoiding heat dissipation blind spots caused by insufficient local spray density.

[0026] Furthermore, adjacent nozzles 600 can be evenly spaced or divided into regions according to actual needs. For example, when the temperature of a specific region of the stator winding 2000 is higher, the density of nozzles 600 in that region will be higher, and vice versa.

[0027] A temperature sensor is attached to the stator winding 2000 housing and electrically connected to the controller to detect the temperature at the stator winding 2000 housing and transmit the temperature information to the controller. A nozzle 600 is connected to a liquid storage chamber 500 via a connecting pipe 700 and a liquid pump 400. Refrigerant is stored in the liquid storage chamber 500. The controller is also electrically connected to the liquid pump 400. When the temperature sensor detects that the temperature at the stator winding 2000 housing is greater than or equal to a first preset temperature value, the controller can control the liquid pump 400 to pump refrigerant from the liquid storage chamber 500 into the nozzle 600, and then spray it onto the surface of the stator winding 2000 housing through the nozzle 600, causing the refrigerant to absorb heat and vaporize on the surface of the stator winding 2000 housing.

[0028] Furthermore, in one embodiment, when the temperature value measured by the temperature sensor is less than the second preset temperature value, the controller controls the liquid pump 400 and the vacuum pump 300 to shut down, and the first preset temperature value is greater than the second preset temperature value.

[0029] It should be noted that the difference between the first preset temperature value and the second preset temperature value is between 5℃ (inclusive) and 10℃ (inclusive).

[0030] Temperature sensors are devices that measure the surface temperature of an object through contact or non-contact methods. Specifically, they can be implemented using thermocouples, thermistors, or infrared temperature measurement modules, and are used to monitor the temperature changes of the stator winding housing in real time.

[0031] The second preset temperature value refers to the shutdown threshold set according to the temperature resistance rating of the motor insulation material. This threshold can be determined through experimental testing or material properties. When the temperature is below this value, it indicates that the heat dissipation requirement has been met. The first preset temperature value refers to the start-up threshold higher than the second preset temperature value. Specifically, it can be set as the second preset temperature value plus a buffer temperature range to prevent frequent start-ups and shutdowns of the equipment near critical temperatures.

[0032] Specifically, when the temperature sensor detects that the temperature of the stator winding 2000 casing is lower than the second preset temperature value, the controller sends a shutdown signal to the liquid pump 400 and the vacuum pump 300. At this time, the refrigerant spraying and gaseous medium suction processes terminate, and the system enters standby mode. A temperature difference exists between the first and second preset temperature values, forming a hysteresis control logic. When the temperature rises back to the first preset temperature value, the controller reactivates the liquid pump 400 and the vacuum pump 300, forming a closed-loop temperature regulation.

[0033] This solution employs dual-threshold control to reduce equipment uptime while ensuring effective heat dissipation. Furthermore, it effectively avoids refrigerant waste and energy loss caused by the vacuum pump running at 300 rpm, while also reducing wear on mechanical components. The temperature hysteresis control strategy prevents the system from frequently switching operating states near critical temperature points, improving equipment stability and extending its service life.

[0034] However, this is not the only option. In another embodiment, when the heat dissipation requirement of the stator winding 2000 is high, the liquid pump 400 and the vacuum pump 300 can also remain in continuous operation.

[0035] like Figure 1 and Figure 3 As shown, the exhaust chamber 200 is located on one side of the stator winding 2000 and the vaporization jacket 100. The exhaust chamber 200 and the vaporization jacket 100 are connected. The exhaust chamber 200 is provided with an exhaust port 210, which is located at the end of the exhaust chamber 200 away from the vaporization jacket 100. The vacuum pump 300 is connected to the exhaust chamber 200 through the exhaust port 210. The vacuum pump 300 is electrically connected to the controller. The controller can control the operation of the vacuum pump 300 to discharge the gaseous refrigerant in the exhaust chamber 200 to the external space.

[0036] It is important to note that the external space can be the atmospheric environment or a specific collection chamber. When the refrigerant is an environmentally friendly refrigerant such as water or alcohol, the gaseous refrigerant can be directly discharged into the atmospheric environment. When the refrigerant has a certain degree of environmental toxicity, it will be discharged into a specific collection chamber for recycling and to prevent environmental pollution.

[0037] It should be noted that the vacuum pump 300 has the following two functions: on the one hand, by creating a negative pressure environment, it can lower the boiling point of the refrigerant, thereby accelerating the vaporization of the refrigerant (the phase change process of the refrigerant itself absorbs a large amount of heat); on the other hand, the vacuum pump 300 can create a pressure difference between the exhaust chamber 200 and the vaporization jacket 100, thereby accelerating the entry of gaseous refrigerant into the exhaust chamber 200.

[0038] Specifically, when the temperature of the stator winding 2000 reaches a threshold, the temperature signal triggers the controller to start the liquid pump 400. Liquid refrigerant in the storage chamber 500 is distributed to each nozzle 600 to form a mist spray, ensuring the refrigerant evenly covers the outer surface of the stator winding 2000 and rapidly absorbs heat and vaporizes. The vacuum pump 300 continuously pumps gaseous refrigerant to the external space, maintaining the internal pressure of the vaporization jacket 100 below the refrigerant's saturated vapor pressure, thus promoting continuous phase change of the liquid refrigerant. This process achieves dynamic matching between heat dissipation intensity and temperature rise rate through closed-loop control.

[0039] Compared to liquid cooling plates, which rely on solid-to-solid contact conduction and are limited by surface processing precision, this solution eliminates contact thermal resistance through direct contact phase change heat transfer. Compared to air-cooled systems, whose heat dissipation capacity is limited by air properties, this solution utilizes the latent heat of phase change to enhance the heat-carrying capacity per unit mass of refrigerant. Furthermore, traditional spray cooling tends to form a liquid film on the surface, hindering heat transfer; this solution combines vacuum extraction to promptly remove gaseous refrigerant, maintaining a highly efficient vaporization process.

[0040] Through the above technical solution, this application realizes active phase change cooling of the stator winding 2000 shell. It increases the refrigerant contact area by using atomized spray and promotes continuous vaporization by combining a vacuum environment. It effectively solves the problems of high contact thermal resistance and low heat exchange efficiency of traditional heat dissipation methods, and is particularly suitable for the transient thermal management needs of high power density motors.

[0041] In one embodiment, such as Figure 1 As shown, the vaporization jacket 100 has an overall annular structure, similar to the shape of a donut. Specifically, the cross-section of the vaporization jacket 100 along the radial direction of the stator winding 2000 is rectangular. At this time, the cavity inside the entire vaporization jacket 100 is uniformly arranged to facilitate the uniform flow of gaseous refrigerant in all places.

[0042] However, this is not the only embodiment; in another embodiment, such as Figure 3As shown, the contact cooling device also includes an intake valve 800. The intake valve 800 is located at the end of the vaporization jacket 100 away from the exhaust chamber 200 and is electrically connected to the controller to control the communication between the vaporization jacket 100 and the external space. When the vacuum pump 300 starts a single operation under the control of the controller, and the operation time is less than a preset time, the controller controls the intake valve 800 to remain closed, so that the vacuum degree in the exhaust chamber 200 continues to increase. In this way, the vacuum degree in the exhaust chamber 200 and the vaporization jacket 100 can be made greater. This facilitates the full vaporization of the liquid refrigerant until the vacuum pump 300 runs for a time greater than or equal to the preset time. At this time, the controller controls the inlet valve 800 to open. Under the action of the internal and external pressure difference, the gas in the external space will pass through the inlet valve 800, vaporization jacket 100, exhaust chamber 200 and vacuum pump 300 in sequence to form a unidirectional flow path. On the one hand, the gas in the vaporization jacket 100 and exhaust chamber 200 can be quickly discharged. On the other hand, the vaporization jacket 100 can play a certain role in cooling the stator winding 2000.

[0043] Specifically, when the vacuum pump 300 starts, the controller controls the opening and closing of the inlet valve 800 based on the relationship between its running time and a preset time. In the initial stage of vacuum pump 300 operation, the inlet valve 800 remains closed, creating a negative pressure environment inside the vaporization jacket 100. This promotes the rapid flow of gaseous refrigerant towards the exhaust chamber 200 and its discharge by the vacuum pump 300. Once the vacuum pump 300 has run for or exceeded the preset time, the controller opens the inlet valve 800, allowing external gas to enter the vaporization jacket 100, balancing the pressure difference between the inside and outside, and preventing structural deformation of the vaporization jacket 100 due to continuous negative pressure.

[0044] Specifically, the preset time ranges from 20 seconds to 300 seconds.

[0045] Furthermore, in one embodiment, as Figure 3 As shown, along the direction from the intake valve 800 to the exhaust chamber 200, the flow area of ​​the vaporization jacket 100 tends to increase. Specifically, the cross-section of the vaporization jacket 100 along the radial direction of the stator winding 2000 is conical or approximately conical, and the taper of the cross-sectional area of ​​the vaporization jacket 100 is between 0 degrees (excluding) and 45 degrees, preferably between 10 degrees and 20 degrees.

[0046] Understandably, as more and more refrigerant vaporizes within the cooling jacket, the total amount of gaseous refrigerant along the direction from the inlet valve 800 to the exhaust chamber 200 increases. Therefore, this configuration serves two purposes: firstly, it balances the gas pressure throughout the vaporization jacket 100, facilitating stable flow of the gaseous refrigerant; secondly, when the vacuum pump 300 starts, the gradually expanding flow area slows the airflow velocity as the gaseous refrigerant enters the exhaust chamber 200 from the vaporization jacket 100, converting dynamic pressure into static pressure and reducing flow resistance. Furthermore, the change in flow cross-section increases turbulence generated by the gaseous refrigerant during flow, enhancing heat transfer. Even further, the narrow region of the vaporization jacket 100 near the inlet valve 800 maintains a higher flow velocity, preventing backflow of liquid refrigerant, while the expanded region near the exhaust chamber 200 facilitates the smooth discharge of the gaseous working fluid.

[0047] Furthermore, in one embodiment, the stator winding 2000 housing has a plurality of turbulence protrusions (not shown) arranged along the side wall near the vaporization jacket 100, running from the inlet valve 800 to the exhaust chamber 200. The arrangement from the inlet valve 800 to the exhaust chamber 200 refers to the protrusions being sequentially arranged along the airflow direction, for example, using a gradually decreasing spacing pattern to accommodate the volume expansion characteristics of the gaseous refrigerant. One end of each turbulence protrusion is connected to the housing of the stator winding 2000, and the other end protrudes towards the vaporization jacket 100. Specifically, adjacent turbulence protrusions are densely arranged, and the turbulence protrusions are serrated; alternatively, adjacent turbulence protrusions may be spaced apart, and the turbulence protrusions may be columnar or other shapes, which are not listed here. The vaporization jacket 100 is attached to the housing of the stator winding 2000 and to the outer wall of the turbulence protrusions.

[0048] On the one hand, by adjusting the height and spacing of the turbulence protrusions, the flow path of the gaseous refrigerant can be interfered with. This structure enhances the phase change heat transfer process by increasing the turbulence of the gaseous refrigerant within the jacket and extending its contact time with the wall surface. On the other hand, the turbulence protrusions increase the contact area between the vaporization jacket 100 and the stator winding 2000, thereby improving heat dissipation efficiency.

[0049] Specifically, during the operation of the vacuum pump 300, gaseous refrigerant flows along the vaporization jacket 100 from the inlet valve 800 towards the exhaust chamber 200. The turbulence protrusions repeatedly obstruct and divert the airflow, forming local vortex regions, which increases the contact area between the gaseous refrigerant and the inner wall of the jacket. At the same time, the protruding structure can break down the thermal resistance of the gas film layer, promoting the heat transfer efficiency of the liquid refrigerant during evaporation on the wall surface.

[0050] In another embodiment, the vaporization jacket 100 has an "n"-shaped cross-section along the radial direction of the stator winding 2000. That is, in this embodiment, the side of the vaporization jacket 100 closest to the outer shell of the stator winding 2000 is the opening of its internal cavity. At this time, the vaporization jacket 100 is not a sealed structure, and the outer shell of the stator winding 2000 is sealed at the opening of the vaporization jacket 100 so that a sealed structure is formed inside the vaporization jacket 100.

[0051] Obviously, with this configuration, the refrigerant can directly contact the outer surface of the stator winding 2000, which greatly improves the heat dissipation efficiency of the stator winding 2000.

[0052] In one embodiment, such as Figure 1 As shown, the vaporization jacket 100 has a liquid-absorbing core structure 900 laid on the inner wall near the stator winding 2000 housing. The liquid-absorbing core structure 900 can absorb a large amount of liquid refrigerant like a sponge, so that the liquid refrigerant and the jacket on one side of the stator winding 2000 housing can maintain long-term contact.

[0053] It should be noted that the liquid wick structure 900 can be sintered powder metal, sponge or other loose and porous structure. The liquid wick relies on the porous structure of the material itself to generate capillary pressure, so that after the liquid is heated and evaporated, the remaining liquid refrigerant can automatically flow back to the evaporation end, so as to facilitate the circulation and heat dissipation of the stator winding 2000.

[0054] Specifically, when the temperature sensor detects that the temperature of the stator winding 2000 casing exceeds a threshold, the liquid pump 400 delivers refrigerant to the nozzle 600 and sprays it onto the surface of the stator winding 2000 casing. The wick structure 900 uses capillary force to adsorb the sprayed liquid refrigerant, ensuring its uniform distribution at the contact interface between the vaporization jacket 100 and the stator winding 2000 casing. In the low-pressure environment created by the vacuum pump 300, the refrigerant rapidly absorbs heat and vaporizes on the wick surface, carrying away a large amount of heat. The vaporized refrigerant vapor is discharged through the exhaust chamber 200, while the residual liquid that is not completely evaporated is continuously adsorbed by the wick and participates in subsequent cycles. The wick structure 900, through active adsorption and diffusion mechanisms, ensures that the refrigerant forms a continuous and uniform liquid film at the contact interface, avoiding a decrease in heat dissipation efficiency due to uneven liquid distribution.

[0055] In one embodiment, such as Figure 1 and Figure 3 As shown, the exhaust chamber 200 is disposed on one side of the vaporization jacket 100 and the stator winding 2000, and is fixedly connected to the vaporization jacket 100. Specifically, the exhaust chamber 200 can be a cover made of plastic or metal. The vaporization jacket 100 is made of the same material as the exhaust chamber 200. The vaporization jacket 100 can be integrally formed with the exhaust chamber 200, or the vaporization jacket 100 can be welded or bonded to the exhaust chamber 200.

[0056] In one embodiment, such as Figures 1-3 As shown, the contact heat dissipation device also includes an annular distribution pipe 1000, which is arranged along the circumference of the vaporization jacket 100 and sequentially connects to multiple nozzles 600. Furthermore, the liquid storage chamber 500 is connected to the distribution pipe 1000 through a connecting pipe 700 and a liquid pump 400. That is, the refrigerant in the liquid storage chamber 500 first enters the distribution pipe 1000 through the connecting pipe 700 and is then distributed to each nozzle 600 on the distribution pipe 1000.

[0057] This solution, through the synergistic effect of the annular distribution pipe 1000 and multiple nozzles 600, enables the refrigerant to form a uniform fluid distribution network around the vaporization jacket 100, significantly improving the heat dissipation uniformity of the contact heat dissipation device.

[0058] This application also provides a motor system, which includes a drive motor and a contact heat dissipation device as described in any of the above embodiments. The drive motor has a stator winding 2000, and the contact heat dissipation device is used to cool the stator winding 2000.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

[0061] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A contact-type heat dissipation device, characterized in that, The device includes a vaporization jacket (100), an exhaust chamber (200), a vacuum pump (300), a liquid pump (400), a liquid storage chamber (500), a nozzle (600), a temperature sensor, a controller, and several connecting pipes (700). The vaporization jacket (100) is fitted on the outer periphery of the stator winding (2000) housing. The nozzle (600) is disposed on the side wall of the vaporization jacket (100). The temperature sensor is disposed on the surface of the stator winding (2000) housing. The nozzle (600) is connected to the liquid storage chamber (500) through the connecting pipes (700) and the liquid pump (400). When the temperature sensor measures that the temperature at the stator winding (2000) housing is greater than or equal to the first preset temperature value, the controller can control the liquid pump (400) to pump the refrigerant from the liquid storage chamber (500) into the nozzle (600), and spray it onto the surface of the stator winding (2000) housing through the nozzle (600) so that the refrigerant absorbs heat and vaporizes on the surface of the stator winding (2000) housing; The vacuum pump (300) is connected to the vaporization jacket (100) through the exhaust chamber (200), and the controller can control the vacuum pump (300) to discharge the gaseous refrigerant in the exhaust chamber (200) to the external space.

2. The contact-type heat dissipation device according to claim 1, characterized in that, It also includes an intake valve (800), which is located at the end of the vaporization jacket (100) away from the exhaust chamber (200). When the operating time of the vacuum pump (300) is less than a preset time, the controller can control the intake valve (800) to remain closed. When the operating time of the vacuum pump (300) is greater than or equal to the preset time, the controller can control the intake valve (800) to open.

3. The contact-type heat dissipation device according to claim 2, characterized in that, Along the direction from the intake valve (800) to the exhaust chamber (200), the flow area of ​​the vaporization jacket (100) tends to increase.

4. The contact-type heat dissipation device according to claim 2, characterized in that, The stator winding (2000) housing has a plurality of turbulence protrusions arranged along the side wall near the vaporization jacket (100) from the intake valve (800) to the exhaust chamber (200). One end of each turbulence protrusion is connected to the housing of the stator winding (2000), and the other end protrudes toward the vaporization jacket (100). The vaporization jacket (100) is attached to the housing of the stator winding (2000) and to the outer wall of the turbulence protrusion.

5. The contact-type heat dissipation device according to claim 1, characterized in that, When the temperature value measured by the temperature sensor is less than the second preset temperature value, the controller can control the liquid pump (400) and the vacuum pump (300) to shut down, and the first preset temperature value is greater than the second preset temperature value.

6. The contact-type heat dissipation device according to claim 1, characterized in that, It also includes an annular distribution pipe (1000), which is arranged around the circumference of the vaporization jacket (100) and sequentially connects to a plurality of nozzles (600). The liquid storage chamber (500) is connected to the distribution pipe (1000) through the connecting pipe (700) and the liquid pump (400).

7. The contact-type heat dissipation device according to claim 1, characterized in that, The number of nozzles (600) is multiple, and the multiple nozzles (600) are arranged at intervals along the circumferential direction of the gasification jacket (100).

8. The contact-type heat dissipation device according to claim 1, characterized in that, The vaporization jacket (100) has a liquid-absorbing core structure (900) laid on the inner wall near the stator winding (2000) shell, which can adsorb liquid refrigerant.

9. The contact-type heat dissipation device according to claim 1, characterized in that, The exhaust chamber (200) is covered on one side of the vaporization jacket (100) and the stator winding (2000), and is fixedly connected to the vaporization jacket (100).

10. A motor system, characterized in that, The device includes a drive motor and a contact-type heat dissipation device as described in any one of claims 1-9, wherein the drive motor has a stator winding (2000) and the contact-type heat dissipation device is used to cool the stator winding (2000).

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