Modular phase change heat transfer inverter unit

Abstract

The application discloses a modular phase change heat exchange inverter unit, which comprises a control box and a capacitor pool stacked and connected, the side of the capacitor pool is provided with an inverter main loop plug-in frame, the inverter main loop plug-in frame is connected with the control box and the capacitor pool respectively, and a phase change heat exchange module is further arranged on the inverter main loop plug-in frame, the hot end of the phase change heat exchange module is attached to the inverter main loop plug-in frame to realize heat transfer; the cold end of the phase change heat exchange module is exposed to the external environment; during use, heat is directly transferred to the hot end of the phase change heat exchange module, refrigerant is vaporized and enters the cold end of the phase change heat exchange module, the cold end is cooled through heat radiation, heat convection and air cooling, refrigerant condenses and liquefies and returns to the phase change heat exchange module through a return liquid pipe under the action of gravity and capillary force, and a heat cycle is completed; compared with air-cooled equipment, the application can realize efficient heat transfer, compared with water-cooled equipment, the application does not need to be provided with a power equipment, and there is no leakage problem, so that the structure of the equipment is effectively simplified.

Description

Technical Field

[0001] This application relates to the field of temperature control equipment technology, specifically to a modular phase change heat inverter unit. Background Technology

[0002] Inverter units in existing power equipment, as core components of frequency converter systems, mainly include input busbars, capacitors, laminated busbars, IGBTs, Hall effect sensors, and output busbars. These components work in conjunction with rectifier units to achieve frequency conversion control of the motor, thereby improving operating efficiency and achieving energy savings.

[0003] The core of the inverter unit's thermal management lies in efficiently dissipating the heat generated by the IGBT, which is crucial for ensuring its stable operation. For low-power applications, air-cooling systems are the preferred solution due to their economy and ease of maintenance. However, for high-power applications, water-cooling systems have become the mainstream choice due to their higher heat transfer efficiency.

[0004] Despite the significant advantages of water cooling in terms of heat dissipation performance, its application also comes with many challenges, including potential leakage risks and complex system structures. Utility Model Content

[0005] The main purpose of this application is to provide a modular phase change thermal inverter unit, which aims to solve the problem of complex system structure in the prior art.

[0006] This application achieves the above objectives through the following technical solutions: A modular phase-change thermal inverter unit includes a control box; A capacitor bank, which is stacked and connected to the control box; An inverter main circuit frame is connected to the control box and the capacitor bank, respectively. The phase-change heat transfer module has its hot end attached to the inverter main circuit frame to achieve heat transfer; the cold end of the phase-change heat transfer module is exposed to the external environment.

[0007] Optionally, the control box includes a box body, and an isolation plate is provided inside the box body; an input terminal circuit is provided on one side of the isolation plate, and a monitoring and control device is provided on the other side of the isolation plate; Optionally, the enclosure is provided with several heat dissipation holes, and the enclosure is also provided with an exhaust fan for dissipating heat from the input circuit.

[0008] Optionally, the capacitor cell includes a capacitor cell frame, on which stacked arrays are arranged; a plurality of capacitors are arranged on the stacked arrays; and a plurality of heat dissipation holes are arranged on the outer peripheral surface of the capacitor cell frame.

[0009] Optionally, the inverter main circuit frame is provided with several groups of IGBT modules, each group of IGBT modules includes 3 IGBT devices, and the IGBT devices are arranged in an inverted triangular structure.

[0010] Optionally, a discharge resistor may be provided between any two adjacent IGBT modules.

[0011] Optionally, the phase change heat transfer module includes an evaporation platform and a condensation platform; the evaporation platform has an evaporation chamber, and the upper side of the evaporation chamber has a first connection port; the condensation platform has a condensation chamber, one end of the condensation chamber is connected to the evaporation chamber through the first connection port; the other end of the evaporation chamber is connected to the lower side of the condensation chamber through at least one return pipe, and the evaporation chamber is filled with refrigerant.

[0012] Optionally, the free end of the condensing platform is inclined downward, and the bottom surface of the free end of the condensing platform is provided with several connection ports, each of which is provided with a return pipe, and each of the return pipes is connected to the evaporation chamber.

[0013] Optionally, a plurality of guide plates are provided in both the evaporation chamber and the condensation chamber, and the guide plates are staggered to form an S-shaped flow channel in the evaporation chamber and the condensation chamber.

[0014] Optionally, a refrigerant charging port is also provided on the evaporation platform; the refrigerant charging port is provided with a sealing cap.

[0015] Compared with the prior art, this application has the following beneficial effects: This application includes a control box and a capacitor bank stacked together. An inverter main circuit frame is also provided on the side of the capacitor bank. The inverter main circuit frame is connected to the control box and the capacitor bank respectively. A phase change heat transfer module is also provided on the inverter main circuit frame. The hot end of the phase change heat transfer module is in contact with the inverter main circuit frame to realize heat transfer. The cold end of the phase change heat transfer module is exposed to the external environment.

[0016] During operation, the heat generated by the device with the highest heat output in the entire inverter unit is directly transferred to the hot end of the phase change heat exchange module, which causes the refrigerant to vaporize. The vaporized refrigerant then enters the cold end of the phase change heat exchange module. Since the cold end is directly exposed to the external environment, it can dissipate heat and cool down through thermal radiation, thermal convection, and air cooling. Subsequently, the refrigerant condenses and liquefies, and enters the return pipe under the action of gravity and capillary force. Finally, it returns to the hot end of the phase change heat exchange module through the return pipe, thus completing the entire thermal cycle. Compared with the prior art, this application disassembles the entire inverter unit into a control box, capacitor bank, inverter main circuit frame and phase conversion heat exchange module, thereby realizing the modular and integrated setting of the main components, which facilitates the assembly and maintenance of the equipment; Secondly, compared with traditional air-cooled equipment, the refrigerant evaporation and condensation recirculation can effectively improve the thermal conductivity, thereby achieving rapid heat output and meeting the temperature control requirements of high-power applications. At the same time, compared with traditional water-cooled cooling systems, the refrigerant is circulated through gravity and capillary force, which does not require complex power equipment and does not have leakage problems. Therefore, it can effectively simplify the structure of the equipment and reduce its size, making it especially suitable for use in space-constrained cabinet layouts. Finally, this application achieves pump-free self-circulation and maintenance-free operation, relying on gravity and capillary force to drive the flow of the working fluid, eliminating the need for external pumps and valves, reducing the risk of failure of moving parts, and lowering operation and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a modular phase-change thermal inverter unit provided in an embodiment of this application; Figure 2 An exploded view of a modular phase-change thermal inverter unit provided in an embodiment of this application; Figure 3 This is a schematic diagram of the control box. Figure 4 This is a schematic diagram of the capacitor cell structure; Figure 5 A schematic diagram of the inverter main circuit interlocking frame; Figure 6 This is a schematic diagram of the phase change heat transfer module; Figure 7 This is a cross-sectional view of the phase change heat transfer module; Reference numerals: 1-Control box, 2-Capacitor cell, 3-Inverter main circuit frame, 4-Phase change heat transfer module, 5-Heat dissipation hole, 101-Box body, 102-Isolation plate, 103-Input circuit, 104-Monitoring and control device, 105-Exhaust fan, 201-Capacitor cell frame, 202-Stacked, 203-Capacitor, 301-IGBT module, 302-Discharge resistor, 401-Evaporation platform, 402-Condensation platform, 403-Evaporation chamber, 404-First connection port, 405-Condensation chamber, 406-Return pipe, 407-Connection port, 408-Guide plate, 409-S-shaped flow channel, 410-Refrigerant charging port, 411-Sealing cover.

[0018] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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 protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] 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 meaning of "and / or" throughout the text includes three parallel solutions. Taking "robot coordinate system and / or m" as an example, it includes a robot coordinate system solution, an m solution, or a solution where both the robot coordinate system and m 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.

[0023] Implementation method 1:

[0024] Reference Figures 1 to 7This embodiment, as an optional embodiment of this application, discloses a modular phase change thermal inverter unit, including a control box 1 and a capacitor bank 2. In the vertical direction, the control box 1 is disposed on top of the capacitor bank 2, thereby stacking the control box 1 and the capacitor bank 2, and finally connecting the control box 1 and the capacitor bank 2 with bolts. The control box 1 includes a box body 101, an input circuit 103 and a monitoring and control device 104 are arranged inside the box body 101, and an isolation plate 102 is also arranged inside the box body 101. The isolation plate 102 is used to isolate the input circuit 103 and the monitoring and control device 104 to prevent thermal radiation interference. At the same time, a number of heat dissipation holes 5 are arranged on the box body 101, and an exhaust fan 105 is also arranged inside the box body 101 to dissipate heat for the input circuit 103. Meanwhile, the main control board, sampling board, power supply, fuse and relay and other control devices are also installed in the housing 101; The internal components of the enclosure 101 generate relatively little heat, with only localized heat accumulation in the input circuit 103. To address this, a small axial fan 105 is added inside the enclosure to improve localized heat generation. This simplifies the structure of the control enclosure 1 while ensuring temperature control requirements, thereby improving the stability and reliability of the equipment. Furthermore, the capacitor cell 2 includes a capacitor cell frame 201, on which a stack 202 is disposed; a plurality of capacitors 203 are disposed on the stack 202; and a plurality of heat dissipation holes 5 are disposed on the outer peripheral surface of the capacitor cell frame 201. The inverter unit also includes an inverter main circuit frame 3. Along the front view direction of the capacitor bank 2, the inverter main circuit frame 3 is disposed on the rear side of the capacitor bank 2. One side of the inverter main circuit frame 3 is connected to the control box 1 and the capacitor bank 2 respectively, and the other side is connected to the phase change heat transfer module 4 and connected to the hot end of the phase change heat transfer module 4. Several groups of IGBT modules 301 are arranged in the inverter main circuit frame 3. Each group of IGBT modules 301 includes 3 IGBT devices. The IGBT devices are arranged in an inverted triangular structure, that is, the two IGBT devices with greater heat generation are arranged side by side on the upper side, and the two with less heat generation are arranged on the lower side. Each group of IGBT modules 301 is arranged sequentially along the length of the inverter main circuit frame 3. Meanwhile, a discharge resistor 302 is also provided between each IGBT device located on the lower side to improve space utilization; The phase change heat transfer module 4 includes an evaporation platform 401 and a condensation platform 402. Both the evaporation platform 401 and the condensation platform 402 are hollow structures. The cavity of the evaporation platform 401 is an evaporation cavity 403, and the cavity of the condensation platform 402 is a condensation cavity 405. The evaporation platform 401 is vertically arranged, and a first connection port 404 is provided on the upper side of the evaporation platform 401 along the vertical direction. The inlet end of the condensation platform 402 is connected to the evaporation chamber 403 through the first connection port 404. At least one return pipe 406 is provided on the lower side of the evaporation chamber 403. The condensing platform 402 is square, but its free end is inclined downwards to assist the refrigerant reflux after condensation through the tilt angle, thereby improving flow efficiency. At the same time, a number of connection ports 407 are provided on the bottom surface of the free end of the condensing platform 402. The number of connection ports 407 is the same as the number of return pipes 406, and each connection port 407 corresponds to and is connected to each of the return pipes 406. The evaporation chamber 403 is filled with refrigerant, preferably a fluorinated liquid refrigerant. When the hot end of the phase change heat exchange module 4 is heated, the refrigerant in the evaporation chamber 403 will vaporize. The vaporized refrigerant rises and enters the condensation chamber 405 through the first connection port 404 located on the upper side of the evaporation chamber 403. Since the condensation chamber is located in a well-ventilated external environment, heat is dissipated through air cooling. The refrigerant will condense again and flow back to the bottom of the evaporation chamber 403 through the return pipe 406 under the action of gravity and capillary force, thus realizing the heat exchange cycle. The above structure makes full use of gravity and capillary force, eliminating the need for complex power equipment and preventing leakage. Therefore, it can effectively simplify the structure of the equipment and reduce its size, making it particularly suitable for use in space-constrained cabinet layouts. Secondly, the above structural arrangement, in conjunction with the inverted triangular IGBT module 301, achieves rapid heat dissipation. The device generating the most heat is placed on the upper side, where the refrigerant level is located, while the device generating less heat is placed on the lower side, where the refrigerant recirculates back into the evaporation chamber. This arrangement allows a large amount of heat to be directly transferred to the refrigerant level, causing rapid refrigerant evaporation and fully utilizing the refrigerant's latent heat of vaporization. This rapid heat transfer helps maintain a uniform temperature on the platform. On the lower side, the refrigerant, at a lower temperature, can quickly absorb heat from the lower, less heat-generating devices through temperature difference, achieving rapid temperature control. Simultaneously, the lower temperature at the bottom prevents rapid boiling and evaporation of the refrigerant, maintaining a stable refrigerant level. Furthermore, it prevents a large number of bubbles from flowing from the bottom of the evaporation chamber to the top, thus avoiding interference with heat dissipation at the top. Therefore, the arrangement of the inverted triangular structure and the coordination of the evaporator cavity 403 functional area can effectively reduce the thermal coupling between IGBTs, make the heat exchanger platform temperature more uniform, and make full use of the phase change characteristics of the refrigerant to achieve rapid heat transfer. Furthermore, both the evaporation chamber 403 and the condensation chamber 405 are provided with a plurality of guide plates 408. Each guide plate 408 has a hole between it and the inner wall of the chamber. The guide plates 408 are staggered, and the holes are staggered, thereby forming an S-shaped flow channel 409 in the evaporation chamber 403 and the condensation chamber 405. Furthermore, a refrigerant charging port 410 is provided on the evaporation platform 401; a sealing cap 411 is provided on the refrigerant charging port 410.

[0025] Compared with the prior art, this application disassembles the entire inverter unit into a control box, capacitor bank, inverter main circuit frame and phase conversion heat exchange module, thereby realizing the modular and integrated setting of the main components, which facilitates the assembly and maintenance of the equipment; Secondly, compared with traditional air-cooled equipment, the refrigerant evaporation and condensation recirculation can effectively improve the thermal conductivity, thereby achieving rapid heat output and meeting the temperature control requirements of high-power applications. At the same time, compared with traditional water-cooled cooling systems, the refrigerant is circulated through gravity and capillary force, which does not require complex power equipment and does not have leakage problems. Therefore, it can effectively simplify the structure of the equipment and reduce its size, making it especially suitable for use in space-constrained cabinet layouts. Finally, this application achieves pump-free self-circulation and maintenance-free operation, relying on gravity and capillary force to drive the flow of the working fluid, eliminating the need for external pumps and valves, reducing the risk of failure of moving parts, and lowering operation and maintenance costs.

[0026] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A modular phase-change thermal inverter unit, characterized in that, Including the control box (1); A capacitor bank (2) is stacked and connected to the control box (1); Inverter main circuit insertion frame (3), the inverter main circuit insertion frame (3) is connected to the control box (1) and the capacitor bank (2) respectively; The phase change heat module (4) has its hot end attached to the inverter main circuit frame (3) to achieve heat transfer; the cold end of the phase change heat module (4) is exposed to the external environment.

2. The modular phase-change thermal inverter unit according to claim 1, characterized in that, The control box (1) includes a box body (101), and an isolation plate (102) is provided inside the box body (101); an input terminal circuit (103) is provided on one side of the isolation plate (102), and a monitoring and control device (104) is provided on the other side of the isolation plate (102).

3. The modular phase-change thermal inverter unit according to claim 2, characterized in that, The housing (101) is provided with a plurality of heat dissipation holes (5), and the housing (101) is also provided with an exhaust fan (105) for dissipating heat from the input circuit (103).

4. The modular phase-change thermal inverter unit according to claim 1, characterized in that, The capacitor pool (2) includes a capacitor pool frame (201), on which stacks (202) are arranged; on the stacks (202) are a plurality of capacitors (203); and on the outer peripheral surface of the capacitor pool frame (201) are a plurality of heat dissipation holes (5).

5. A modular phase-change thermal inverter unit according to claim 1, characterized in that, The inverter main circuit insertion frame (3) is provided with several groups of IGBT modules (301), each group of IGBT modules (301) includes 3 IGBT devices, and each IGBT device is arranged in an inverted triangular structure.

6. A modular phase-change thermal inverter unit according to claim 5, characterized in that, A discharge resistor (302) is provided between any two adjacent IGBT modules (301).

7. A modular phase-change thermal inverter unit according to claim 1, characterized in that, The phase change heat transfer module (4) includes an evaporation platform (401) and a condensation platform (402); an evaporation chamber (403) is provided in the evaporation platform (401), and a first connection port (404) is provided on the upper side of the evaporation chamber (403); a condensation chamber (405) is provided in the condensation platform (402), one end of the condensation chamber (405) is connected to the evaporation chamber (403) through the first connection port (404); the other end of the evaporation chamber (403) is connected to the lower side of the condensation chamber (405) through at least one return pipe (406), and the evaporation chamber (403) is filled with refrigerant.

8. A modular phase-change thermal inverter unit according to claim 7, characterized in that, The condensing platform (402) is inclined downward at its free end. The bottom surface of the free end of the condensing platform (402) is provided with a number of connection ports (407). Each connection port (407) is provided with a return pipe (406), and each return pipe (406) is connected to the evaporation chamber (403).

9. A modular phase-change thermal inverter unit according to claim 7 or 8, characterized in that, Both the evaporation chamber (403) and the condensation chamber (405) are provided with a plurality of guide plates (408), and the guide plates (408) are staggered to form an S-shaped flow channel (409) in the evaporation chamber (403) and the condensation chamber (405).

10. A modular phase-change thermal inverter unit according to claim 7, characterized in that, The evaporation platform (401) is also provided with a refrigerant charging port (410); the refrigerant charging port (410) is provided with a sealing cap (411).

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