Water-cooled frequency converter

By employing a water-cooled radiator and an independent cavity design in the frequency converter, the problems of large size and poor heat dissipation of the frequency converter are solved, achieving a smaller size and better heat dissipation, and adapting to different installation environments.

CN223744570UActive Publication Date: 2025-12-30SHENZHEN V&T TECH
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Patent Information

Application Number
CN202423306301.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-12-30
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

Existing frequency converters are large in size and have poor heat dissipation performance, making installation difficult, especially in situations where there is limited space in electrical cabinets or electrical installation rooms. Furthermore, the heat dissipation of air-cooled frequency converters is limited by the difference in ambient temperature, resulting in poor stability.

Method used

Design a water-cooled frequency converter that uses a drawer-type water-cooled heat sink. The internal structure is divided into independent electromagnetic radiation and thermal radiation shielding spaces. The overall structure is smaller and has better heat dissipation performance. Components such as DC reactors, capacitors, and rectifier bridges are housed in independent cavities, and IGBT components are set up correspondingly with the water-cooled heat sink.

Benefits of technology

This results in a smaller overall size of the frequency converter, improved heat dissipation performance, reduced heat radiation and electromagnetic interference, adaptability to different installation space requirements, and improved stability and flexibility of use.

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Abstract

The utility model relates to the technical field of frequency conversion equipment, and provides a water-cooling frequency converter which comprises a box body and a water-cooling radiator. The box body comprises a left cavity, a right cavity back to the left cavity and a front cavity corresponding to the left cavity and the right cavity at the same time, and the left cavity, the right cavity and the front cavity are independent of one another; a mounting groove is formed in the box body, and the water-cooling radiator is inserted into the mounting groove and located between the left cavity and the right cavity. The space in the box body is reasonably divided into three independent spaces so as to meet the dependent electromagnetic radiation and thermal radiation shielding effect, and thermal radiation interference and electrical electromagnetic interference of all parts can be reduced to the maximum extent. Meanwhile, the water-cooling radiator adopts a drawer type structure, the thickness can be designed to be thinner, and compared with an air-cooling radiator, the water-cooling frequency converter is smaller in overall size, and the thickness of the water-cooling radiator can be 30% of that of the air-cooling radiator, so that the water-cooling frequency converter provided by the utility model is smaller in overall size and better in heat dissipation performance.
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Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular provides a water-cooled frequency converter. Background Technology

[0002] In related fields, water-cooled frequency converters have gained market recognition for their excellent heat dissipation performance and high reliability; however, because their appearance is still based on conventional air-cooled frequency converters, their width is relatively large, making installation relatively difficult in situations where there are limitations on the width of electrical cabinets or the installation space in electrical installation rooms.

[0003] While book-style air-cooled inverters have the advantage of being narrow and flexible in limited installation space, their air-cooling method is more limited by the operating environment. Differences in ambient temperature lead to differences in the stability of this type of inverter.

[0004] Therefore, there is an urgent need for a product that can solve the problems of large size and poor heat dissipation performance of frequency converters. Utility Model Content

[0005] The purpose of this invention is to provide a water-cooled frequency converter, which aims to solve the problems of large overall size and poor heat dissipation performance of existing frequency converters.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a water-cooled frequency converter, comprising:

[0008] The housing includes a left cavity, a right cavity opposite to the left cavity, and a front cavity corresponding to both the left cavity and the right cavity, wherein the left cavity, the right cavity, and the front cavity are independent of each other;

[0009] A water-cooled radiator is provided, with a mounting slot on the housing. The water-cooled radiator is inserted into the mounting slot and located between the left cavity and the right cavity.

[0010] The beneficial effects of this utility model are as follows: The water-cooled frequency converter provided by this utility model rationally divides the space inside its enclosure into three independent spaces to meet the interdependent electromagnetic radiation and thermal radiation shielding effects, thereby minimizing thermal radiation interference and electrical electromagnetic interference of each component. Simultaneously, the water-cooled radiator adopts a drawer-type structure and can be designed to be thinner, resulting in a smaller overall volume compared to air-cooled radiators. Its thickness can be 30% of that of air-cooled radiators. Therefore, the water-cooled frequency converter provided by this application has a smaller overall volume and better heat dissipation performance.

[0011] In one embodiment, the left cavity includes a reactor mounting cavity, a capacitor mounting cavity, and a rectifier bridge mounting cavity. The water-cooled frequency converter includes a DC reactor, a DC contactor, a rectifier bridge, and an electrolytic capacitor bank. The reactor mounting cavity, the capacitor mounting cavity, and the rectifier bridge mounting cavity are independent of each other. The DC reactor and the DC contactor are located in the reactor mounting cavity; the rectifier bridge is located in the rectifier bridge mounting cavity; and the electrolytic capacitor bank is located in the capacitor mounting cavity.

[0012] In one embodiment, the water-cooled inverter further includes a buffer resistor disposed in the reactor mounting cavity, a voltage equalizing resistor disposed in the rectifier bridge mounting cavity, and a rectifier absorption capacitor, wherein the left mounting surface of the water-cooled radiator corresponds to the rectifier bridge.

[0013] In one embodiment, the water-cooled inverter further includes an electrolytic capacitor fan, which is located at the capacitor mounting cavity; and the housing is also provided with a heat dissipation duct, which is connected to the reactor mounting cavity.

[0014] In one embodiment, the front cavity includes a main circuit input / output cavity, a main control board mounting cavity, and a DC bus positive and negative input / output cavity arranged sequentially along the height direction of the housing. The main circuit input / output cavity, the main control board mounting cavity, and the DC bus positive and negative input / output cavity are independent of each other.

[0015] In one embodiment, the water-cooled frequency converter further includes a busbar positive and negative copper busbar disposed in the DC busbar positive and negative input / output cavity, a main control board disposed in the main control board mounting cavity, and a main circuit copper busbar disposed in the main circuit input / output cavity.

[0016] In one embodiment, the water-cooled inverter further includes an IGBT assembly disposed in the right cavity, the IGBT assembly corresponding to the right mounting surface of the water-cooled radiator.

[0017] In one embodiment, the IGBT assembly includes an IGBT driver board, a chip body, and an IGBT snubber capacitor disposed on the IGBT driver board.

[0018] In one embodiment, the water-cooled inverter further includes a shielding mounting plate covering the IGBT assembly.

[0019] In one embodiment, the water-cooled frequency converter further includes a function board and a power drive board disposed on the shielding mounting plate. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An exploded view of the water-cooled frequency converter provided in this embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0023] Figure 3 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0024] Figure 4 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0025] Figure 5 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0026] Figure 6 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0027] Figure 7 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0028] Figure 8 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0029] Figure 9 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model;

[0030] Figure 10 A schematic diagram of the structure of the water-cooled frequency converter provided in the embodiment of this utility model.

[0031] The following are the labeling elements in the figure:

[0032] 10. Enclosure; 101. DC Reactor; 102. DC Contactor; 103. Rectifier Bridge; 104. Electrolytic Capacitor Bank; 105. Buffer Resistor; 106. Voltage Equalizing Resistor; 107. Rectifier Absorption Capacitor; 108. Electrolytic Capacitor Fan; 109. Main Control Board; 110. Main Circuit Copper Busbar; 111. IGBT Assembly; 112. IGBT Driver Board; 113. Chip Body; 114. IGBT Absorption Capacitor; 115. Shielding Mounting Plate; 116. Function Board; 117. Power Driver Board;

[0033] 10a, Left cavity; 10a1, Reactor mounting cavity; 10a2, Capacitor mounting cavity; 10a3, Rectifier bridge mounting cavity;

[0034] 10b, right cavity;

[0035] 10c, Front cavity; 10c1, Main circuit input / output cavity; 10c2, Main control board mounting cavity; 10c3, DC bus positive and negative input / output cavity;

[0036] 20. Water-cooled radiator; 20a. Mounting slot. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0039] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Please refer to Figures 1 to 10 The present application provides a water-cooled frequency converter, which includes a housing 10 and a water-cooled radiator 20.

[0042] The housing 10 includes a left cavity 10a, a right cavity 10b arranged opposite to the left cavity 10a, and a front cavity 10c corresponding to both the left cavity 10a and the right cavity 10b. The left cavity 10a, the right cavity 10b, and the front cavity 10c are independent of each other.

[0043] The enclosure 10 has a mounting slot 20a, and the water-cooled radiator 20 is inserted into the mounting slot 20a and located between the left cavity 10a and the right cavity 10b.

[0044] The water-cooled frequency converter provided by this utility model rationally divides the space inside its housing 10 into three independent spaces to meet the interdependent electromagnetic and thermal radiation shielding effects, thereby minimizing thermal radiation interference and electrical electromagnetic interference of each component. Meanwhile, the water-cooled radiator 20 adopts a drawer-type structure and can be designed to be thinner, resulting in a smaller overall volume compared to air-cooled radiators. Its thickness can be 30% of that of air-cooled radiators. Therefore, the water-cooled frequency converter provided by this application has a smaller overall volume and better heat dissipation performance.

[0045] Please refer to Figures 1 to 10 In one embodiment, the left cavity 10a includes a reactor mounting cavity 10a1, a capacitor mounting cavity 10a2, and a rectifier bridge mounting cavity 10a3. The water-cooled frequency converter includes a DC reactor 101, a DC contactor 102, a rectifier bridge 103, and an electrolytic capacitor bank 104. The reactor mounting cavity 10a1, the capacitor mounting cavity 10a2, and the rectifier bridge 103 mounting cavity 10a3 are independent of each other. The DC reactor 101 and the DC contactor 102 are located in the reactor mounting cavity 10a1; the rectifier bridge 103 is located in the rectifier bridge 103 mounting cavity 10a3; and the electrolytic capacitor bank 104 is located in the capacitor mounting cavity 10a2.

[0046] Please refer to Figures 1 to 10 In one embodiment, the water-cooled inverter further includes a buffer resistor 105 disposed in the reactor mounting cavity 10a1, a voltage equalizing resistor 106 disposed in the rectifier bridge 103 mounting cavity 10a3, and a rectifier absorption capacitor 107, with the left mounting surface of the water-cooled radiator 20 corresponding to the rectifier bridge 103.

[0047] Understandably, the DC reactor 101 is installed in the reactor mounting cavity 10a1 at the top, which is conducive to the direct dissipation of the high temperature generated by the DC reactor 101 during operation from the top of the housing 10. A DC contactor 102 is installed on the left side of the DC reactor 101. The negative terminal is led out from the rectifier bridge 103 to the DC contactor 102. A buffer resistor 105 is connected between the two ends of the DC contactor 102, and then the negative terminal is introduced into the negative terminal of the electrolytic capacitor to form the negative terminal of the bus.

[0048] Please refer to Figures 1 to 10 In one embodiment, the water-cooled inverter further includes an electrolytic capacitor fan 108, which is located at the capacitor mounting cavity 10a2; and the housing 10 is also provided with a heat dissipation duct, which is connected to the reactor mounting cavity 10a1.

[0049] Understandably, the electrolytic capacitor bank 104 is installed in the electrolytic capacitor cavity within the left cavity 10a. This cavity has an independent cooling fan, forming an independent ventilation channel for heat dissipation, ensuring the capacitors operate at a suitable temperature and significantly increasing their lifespan. Furthermore, the reactor at the top of the left cavity 10a is mounted on the top surface of the cavity 10a1, which is the entire top surface of the machine, and is designed with a cooling channel for airflow between the internal and external parts of the machine, ensuring the normal operating temperature inside the machine.

[0050] Please refer to Figures 1 to 10 In one embodiment, the front cavity 10c includes a main circuit input / output cavity 10c1, a main control board mounting cavity 10c2, and a DC bus positive and negative input / output cavity 10c3 arranged sequentially along the height direction of the housing 10. The main circuit input / output cavity 10c1, the main control board mounting cavity 10c2, and the DC bus positive and negative input / output cavity 10c3 are independent of each other.

[0051] Please refer to Figures 1 to 10 In one embodiment, the water-cooled frequency converter further includes a busbar positive and negative copper bus in the DC busbar positive and negative input / output cavity 10c3, a main control board 109 in the main control board mounting cavity 10c2, and a main circuit copper bus 110 in the main circuit input / output cavity 10c1.

[0052] Understandably, the top of the front cavity 10c has busbars (positive and negative) led out from the left cavity 10a, forming the DC busbar input / output cavity 10c3. Designing the busbar input / output terminals at the top facilitates the connection of the water-cooled inverter to the common busbar and external DC power supply. The middle section of the front cavity 10c has an independent cavity for mounting the main control board 109. This sheet metal cavity isolates the high-voltage electricity, maximizing the isolation of electromagnetic radiation interference and promoting more stable operation of the water-cooled inverter. The bottom cavity of the front cavity 10c has input R, S, and T busbars led out from the left cavity 10a, and output U, V, and W busbars led out from the right cavity 10b. R, S, and T are three-phase 380V AC inputs; U, V, and W are the three-phase inverter outputs of the inverter, connected to the motor equipment.

[0053] Please refer to Figures 1 to 10 In one embodiment, the water-cooled inverter further includes an IGBT assembly 111 disposed in the right cavity 10b, the IGBT assembly 111 corresponding to the right mounting surface of the water-cooled radiator 20.

[0054] Please refer to Figures 1 to 10 In one embodiment, the IGBT assembly 111 includes an IGBT driver board 112 and a chip body 113 and an IGBT absorption capacitor 114 disposed on the IGBT driver board 112.

[0055] Please refer to Figures 1 to 10 In one embodiment, the water-cooled inverter further includes a shielding mounting plate 115 covering the IGBT assembly 111.

[0056] Please refer to Figures 1 to 10 In one embodiment, the water-cooled inverter further includes a function board 116 and a power drive board 117 disposed on the shielding mounting plate 115.

[0057] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-cooled frequency converter, characterized by The utility model relates to a water-cooled frequency converter, including: a box body including a left cavity, a right cavity arranged opposite to the left cavity and a front cavity corresponding to the left cavity and the right cavity, the left cavity, the right cavity and the front cavity are independent of each other; a water-cooled radiator is arranged in the mounting groove of the box body and located between the left cavity and the right cavity; the left cavity includes an electric reactor mounting cavity, a capacitor mounting cavity and a rectifier bridge mounting cavity, the water-cooled frequency converter includes a direct-current reactor, a direct-current contactor, a rectifier bridge and an electrolytic capacitor group, the electric reactor mounting cavity, the capacitor mounting cavity and the rectifier bridge mounting cavity are independent of each other, the direct-current reactor and the direct-current contactor are arranged in the electric reactor mounting cavity; the rectifier bridge is arranged in the rectifier bridge mounting cavity; the electrolytic capacitor group is arranged in the capacitor mounting cavity; the front cavity includes a main circuit input and output cavity, a main control panel mounting cavity and a direct-current bus positive and negative input and output cavity arranged in sequence along the height direction of the box body, the main circuit input and output cavity, the main control panel mounting cavity and the direct-current bus positive and negative input and output cavity are independent of each other; the water-cooled frequency converter further includes an IGBT assembly arranged in the right cavity, and the IGBT assembly corresponds to the right mounting surface of the water-cooled radiator.

2. The water-cooled frequency inverter according to claim 1, characterized by: The water-cooled frequency converter further includes a buffer resistor arranged in the electric reactor mounting cavity, a voltage equalization resistor and a rectifier absorption capacitor arranged in the rectifier bridge mounting cavity, and the left mounting surface of the water-cooled radiator corresponds to the rectifier bridge.

3. The water-cooled frequency inverter according to claim 1, characterized by: The water-cooled frequency converter further includes an electrolytic capacitor fan arranged at the capacitor mounting cavity, and a heat dissipation air duct arranged on the box body and in communication with the electric reactor mounting cavity.

4. The water-cooled frequency inverter of claim 1, wherein: The water-cooled frequency converter further includes a bus positive and negative copper bar arranged in the direct-current bus positive and negative input and output cavity, a main control panel arranged in the main control panel mounting cavity and a main circuit copper bar arranged in the main circuit input and output cavity.

5. The water-cooled frequency inverter of claim 1, wherein: The IGBT assembly includes an IGBT drive panel, a chip body and an IGBT absorption capacitor arranged on the IGBT drive panel.

6. The water-cooled frequency inverter according to claim 5, characterized by: The water-cooled frequency converter further includes a shielding mounting plate arranged on the IGBT assembly.

7. The water-cooled frequency inverter according to claim 6, characterized by: The water-cooled frequency converter further includes a functional panel and a power supply drive panel arranged on the shielding mounting plate.