Liquid-cooled frequency converter

Abstract

A liquid-cooled frequency converter provided by the present invention comprises a shell, a liquid-cooled box, an IGBT and a thyristor, the liquid-cooled box is arranged in the shell, the IGBT and the thyristor are both arranged in the shell and connected with the liquid-cooled box, liquid for cooling and heat dissipation can be introduced into the liquid-cooled box, the IGBT exchanges heat with the liquid-cooled box in a contact manner so as to be cooled by the liquid-cooled box, and the liquid-cooled box is connected with the liquid-cooled box. The thyristors exchange heat with the liquid cooling box in a contact manner so as to be cooled by the liquid cooling box; the liquid cooling box is located in the middle of the shell, the IGBTs and the thyristors are located on the periphery of the liquid cooling box, and the middle of the liquid cooling box is located in the space defined by the IGBTs and the thyristors. According to the invention, the surface space of the liquid cooling box is fully utilized, global heat dissipation of components in the frequency converter is realized, the heat dissipation efficiency is improved, the structure is more compact, and heat dissipation, disassembly and assembly can be taken into consideration; the frequency converter effectively solves the problem of low heat dissipation efficiency caused by the fact that a frequency converter in the prior art cannot dissipate heat and cool a plurality of components in the frequency converter.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converters, and in particular to a liquid-cooled frequency converter. Background Art

[0002] With the rapid development of electronic technology and the widespread use of automated electrical equipment, the number of electronic components installed within these devices has increased significantly to meet diverse functional requirements. This increased use of components inevitably leads to increased heat generation within the equipment. Heat accumulation can lead to operational failures and even damage. Furthermore, existing inverters are unable to dissipate heat from the numerous components within the inverter, resulting in low heat dissipation efficiency.

[0003] Since the inverter in the prior art has technical problems such as being unable to dissipate heat and cool multiple components inside the inverter, resulting in low heat dissipation efficiency, the present invention studies and designs a liquid-cooled inverter. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the inverter in the prior art that it cannot dissipate heat and cool multiple components inside the inverter, resulting in low heat dissipation efficiency, thereby providing a liquid-cooled inverter.

[0005] In order to solve the above problems, the present invention provides a liquid-cooled inverter, which includes:

[0006] A shell, a liquid cooling box, an IGBT and a thyristor, wherein the liquid cooling box is arranged inside the shell, the IGBT and the thyristor are both arranged inside the shell and are both connected to the liquid cooling box, liquid for cooling and heat dissipation can be passed into the liquid cooling box, the IGBT and the liquid cooling box are in contact with each other to exchange heat so that they can be cooled by the liquid cooling box, and the thyristor and the liquid cooling box are in contact with each other to exchange heat so that they can be cooled by the liquid cooling box; the liquid cooling box is located in the middle of the shell, the IGBT and the thyristor are both located on the periphery of the liquid cooling box, and the middle is located in the space enclosed by the IGBT and the thyristor.

[0007] In some embodiments,

[0008] It also includes a relay and a circuit breaker, which are also arranged inside the shell and are both connected to the outer periphery of the liquid cooling box. The relay and the liquid cooling box are in contact with each other for heat exchange so that they can be cooled by the liquid cooling box. The circuit breaker and the liquid cooling box are in contact with each other for heat exchange so that they can be cooled by the liquid cooling box.

[0009] In some embodiments,

[0010] It also includes a capacitor, which is arranged inside the liquid cooling box to directly contact the liquid cooling liquid in the liquid cooling box for heat exchange, so as to be cooled by the liquid cooling liquid.

[0011] In some embodiments,

[0012] It also includes a supporting pipe and an inverter bottom cover, the inverter bottom cover is arranged at the bottom end of the shell, the liquid cooling box is supported on the inverter bottom cover through the supporting pipe, and an inlet hole is also provided on the supporting pipe at a position opposite to the height of the liquid cooling box. The inlet hole passes through the supporting pipe to communicate with the interior of the liquid cooling box, so that liquid cooling liquid can be introduced through the interior of the supporting pipe, and the liquid cooling liquid is introduced into the liquid cooling box through the inlet hole.

[0013] In some embodiments,

[0014] There are at least two supporting pipes, and the at least two supporting pipes are arranged at intervals to support different positions of the liquid cooling box;

[0015] The inverter bottom cover is provided with a bottom water inlet in a manner penetrating the upper and lower end surfaces thereof. The bottom water inlet is vertically opposite to and connected to the support pipe, so that liquid cooling liquid is supplied into the support pipe through the bottom water inlet.

[0016] In some embodiments,

[0017] The liquid cooling box includes a water tank bottom cover and a water tank top cover. The support pipe runs through the water tank bottom cover to the interior of the liquid cooling box, and the upper end of the support pipe abuts against the water tank top cover to support the liquid cooling box. The inlet hole is opposite to and connected to the internal space of the liquid cooling box.

[0018] In some embodiments,

[0019] A water tank outlet pipe is provided on the water tank top cover, and the liquid-cooled inverter also includes an inverter top cover, and an inverter water outlet is provided on the inverter top cover. The lower end of the water tank outlet pipe is connected to the interior of the liquid cooling box, and the upper end of the water tank outlet pipe is opposite to and connected to the inverter water outlet so that the water in the liquid cooling box can be discharged.

[0020] In some embodiments,

[0021] The inverter top cover is provided with a three-phase input port and a three-phase output port. The three-phase input port is used to introduce wiring into the inverter, and the three-phase output port is used to lead the wiring in the inverter out of the inverter.

[0022] In some embodiments,

[0023] The inverter top cover is a circular plate structure, the inverter bottom cover is also a circular plate structure, the shell is a cylindrical structure, the inverter top cover is arranged at the top end of the shell, and the inverter bottom cover is arranged at the bottom end of the shell; the liquid cooling box has a cylindrical structure.

[0024] In some embodiments,

[0025] It also includes a capacitor clip bracket and a busbar. When a capacitor is also included, the busbar is arranged at the bottom of the capacitor, the capacitor clip bracket is fixed to the supporting pipe, and the capacitor is fixed to the capacitor clip bracket, so that the capacitor is fixed to the supporting pipe through the capacitor clip bracket; an isolation plate is also provided on the periphery of the capacitor, and the capacitor can exchange heat with the liquid cooling liquid in the liquid cooling box through the isolation plate.

[0026] The liquid-cooled frequency converter provided by the present invention has the following beneficial effects:

[0027] 1. The present invention sets a liquid cooling box inside the shell of the inverter, in which liquid for cooling and dissipating heat flows, and at the same time, the IGBT and thyristor are also set inside the shell and connected to the outer periphery of the liquid cooling box, and the liquid cooling box is surrounded by the middle part of the shell, so that the liquid cooling box is located in the middle, and multiple components that need to dissipate heat are located around it and dissipate heat in contact with the liquid cooling box. The liquid cooling box in the middle can be used to dissipate heat and cool multiple components inside the inverter, and the surface space of the liquid cooling box is fully utilized to achieve global heat dissipation of the components in the inverter, thereby improving the heat dissipation efficiency. It also realizes the integration of the internal components of the inverter into an integrated heat dissipation structure, making the structure more compact and greatly reducing the volume. At the same time, it can also take into account heat dissipation and disassembly and installation, without the need for complex liquid cooling pipe design, and the internal cleaning is more convenient; it effectively solves the problem that the inverter in the prior art cannot dissipate heat and cool multiple components inside the inverter, resulting in low heat dissipation efficiency.

[0028] 2. The present invention also arranges the relay and the circuit breaker as a contact heat exchange structure with the outer periphery of the liquid cooling box, and can further utilize the outer peripheral surface of the liquid cooling box to perform contact heat exchange on the multiple components, thereby further improving the heat exchange efficiency of the outer surface of the liquid cooling box and improving the heat exchange efficiency inside the inverter; the present invention further arranges the capacitor inside the liquid cooling box to perform contact heat exchange with the liquid, which can increase the cooling and heat dissipation efficiency of the capacitor, and at the same time further utilize the internal space of the liquid cooling box, further making the structure more compact and reducing the overall volume of the inverter.

[0029] 3. The present invention also provides a support pipe, which can support the liquid cooling box above the bottom cover of the inverter and use the support pipe to pass liquid cooling liquid into the liquid cooling box, reducing the layout of the pipes, making the structure more compact and miniaturized; the present invention provides a capacitor clip bracket and fixes it to the support pipe, which can achieve the fixation of the capacitor, so that the liquid is used inside the liquid cooling box for effective contact cooling and heat dissipation of the capacitor, thereby improving stability, increasing the cooling performance of the bottom of the capacitor, and improving the cooling and heat dissipation performance of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the three-dimensional structure + top view + bottom view of the liquid-cooled inverter of the present invention;

[0031] Figure 2 It is a diagram of the internal structure of the liquid-cooled inverter of the present invention;

[0032] Figure 3 This is a bottom-up structural diagram of the liquid cooling box of the frequency converter of the present invention;

[0033] Figure 4 It is a partial cross-sectional structural diagram of the liquid cooling box portion of the frequency converter of the present invention.

[0034] The reference numerals indicate:

[0035] 1. Inverter top cover; 2. Inverter bottom cover; 3. Housing; 4. IGBT; 5. Thyristor; 6. Thermostat; 7. Relay; 8. Circuit breaker; 9. Water tank top cover; 10. Busbar; 11. Capacitor; 12. Support pipe; 13. Isolation plate; 14. Inlet hole; 15. Water tank bottom cover; 16. Inverter water outlet; 17. Capacitor clip bracket; 18. Water tank outlet pipe; 19. Bottom water inlet; 20. Three-phase input port; 21. Three-phase output port; 22. Busbar mounting hole; 100. Liquid cooling box. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0039] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] like Figure 1-4 As shown, the present invention provides a liquid-cooled inverter, which includes:

[0043] The shell 3, the liquid cooling box 100, the IGBT4 and the thyristor 5, the liquid cooling box 100 is arranged inside the shell 3, the IGBT4 and the thyristor 5 are both arranged inside the shell 3 and are both connected to the liquid cooling box 100, the liquid cooling box 100 can be passed into the liquid cooling box 100 for cooling and dissipating heat, the IGBT4 and the liquid cooling box 100 are in contact with each other for heat exchange so as to be cooled by the liquid cooling box 100, and the thyristor 5 and the liquid cooling box 100 are in contact with each other for heat exchange so as to be cooled by the liquid cooling box 100; the liquid cooling box 100 is located in the middle of the shell 3, the IGBT4 and the thyristor 5 are both located on the periphery of the liquid cooling box 100, and the middle is located in the space surrounded by the IGBT4 and the thyristor 5.

[0044] The present invention sets a liquid cooling box inside the shell of the inverter, and liquid for cooling and dissipating heat flows inside the liquid cooling box. At the same time, the IGBT and thyristor are also set inside the shell and connected to the outer periphery of the liquid cooling box, and the liquid cooling box is surrounded by the middle part of the shell, so that the liquid cooling box is located in the middle, and multiple components that need to dissipate heat are located around it and dissipate heat in contact with the liquid cooling box. The liquid cooling box in the middle can be used to dissipate heat and cool multiple components inside the inverter, and the surface space of the liquid cooling box is fully utilized to achieve global heat dissipation of the components in the inverter, improve the heat dissipation efficiency, and also realize the integration of the internal components of the inverter into an integrated heat dissipation structure, making the structure more compact and greatly reducing the volume. At the same time, it can also take into account heat dissipation and disassembly and installation, without the need for complex liquid cooling pipe design, and internal cleaning is more convenient; it effectively solves the problem that the inverter in the prior art cannot dissipate heat and cool multiple components inside the inverter, resulting in low heat dissipation efficiency.

[0045] See Figure 2 The IGBT4 and thyristor 5 of the present invention are the main heating components of the inverter. Their backs are tightly attached to the surface of the column-type liquid cooling box 100 to achieve rapid heat dissipation. The IGBT and three thyristors can just fill the four sides of the column-type liquid cooling box 100 to maximize utilization. Other weak-current components are preferably installed on the surface of the inverter bottom cover 2 to separate strong and weak electricity and ensure electrical safety.

[0046] In some embodiments,

[0047] It also includes a relay 7 and a circuit breaker 8, which are also arranged inside the shell 3 and are both connected to the outer periphery of the liquid cooling box 100. The relay 7 and the liquid cooling box 100 are in contact with each other for heat exchange so that they can be cooled by the liquid cooling box 100. The circuit breaker 8 and the liquid cooling box 100 are in contact with each other for heat exchange so that they can be cooled by the liquid cooling box 100.

[0048] The present invention also arranges the relay and the circuit breaker as a contact heat exchange structure with the periphery of the liquid cooling box, and can further use the peripheral surface of the liquid cooling box to perform contact heat exchange on the multiple components, thereby further improving the heat exchange efficiency of the outer surface of the liquid cooling box and improving the heat exchange efficiency inside the inverter.

[0049] In some embodiments,

[0050] The liquid cooling box 100 further includes a capacitor 11 , which is disposed inside the liquid cooling box 100 to directly exchange heat with the liquid cooling liquid in the liquid cooling box 100 so as to be cooled by the liquid cooling liquid.

[0051] The present invention further increases the cooling and heat dissipation efficiency of the capacitor by placing the capacitor inside the liquid cooling box and performing contact heat exchange with the liquid. At the same time, it further utilizes the internal space of the liquid cooling box, making the structure more compact and reducing the overall volume of the inverter.

[0052] In some embodiments,

[0053] It also includes a supporting pipe 12 and an inverter bottom cover 2. The inverter bottom cover 2 is arranged at the bottom end of the shell 3. The liquid cooling box 100 is supported on the inverter bottom cover 2 through the supporting pipe 12. An inlet hole 14 is also provided at a position on the supporting pipe 12 that is highly opposite to the liquid cooling box 100. The inlet hole 14 passes through the supporting pipe 12 and is connected to the interior of the liquid cooling box 100, so that liquid cooling liquid can be introduced through the interior of the supporting pipe 12 and the liquid cooling liquid can be introduced into the liquid cooling box 100 through the inlet hole 14.

[0054] The present invention also provides the support pipe inside the inverter, so that the liquid cooling box can be supported above the bottom cover of the inverter and liquid cooling liquid can be introduced into the liquid cooling box through the support pipe, thereby reducing the arrangement of the pipes, making the structure more compact and miniaturized.

[0055] The present invention provides a column-mounted, integrated liquid-cooled inverter, comprising an inverter top cover 1, an inverter bottom cover 2, a housing 3 with a circular outer surface, a column-mounted liquid cooling box 100, and necessary electronic components. The liquid cooling box 100 is welded to the inverter bottom cover 2 via support pipes 12, positioning the entire liquid cooling box away from the inverter bottom cover 2 and facilitating component installation. Other electronic components are mounted on the surfaces of the inverter bottom cover 2 and the liquid cooling box 100.

[0056] In some embodiments,

[0057] There are at least two supporting pipes 12, and the at least two supporting pipes 12 are arranged at intervals to support different positions of the liquid cooling box 100;

[0058] The inverter bottom cover 2 is provided with a bottom water inlet 19 penetrating the upper and lower end surfaces thereof. The bottom water inlet 19 is vertically opposite to and connected to the support pipe 12 , so that liquid cooling liquid is supplied into the support pipe 12 through the bottom water inlet 19 .

[0059] The present invention can enhance the support stability of the liquid cooling box through the above-mentioned at least two supporting pipes, and can also increase the flow rate of liquid supplied to the liquid cooling box; the bottom water inlet arranged on the bottom cover of the inverter can be opposite to and connected to the supporting pipe in the vertical direction, and the bottom water inlet can be used to supply liquid cooling fluid to the supporting pipe, and further enter the liquid cooling box.

[0060] In some embodiments,

[0061] The liquid cooling box 100 includes a water tank bottom cover 15 and a water tank top cover 9. The support pipe 12 passes through the water tank bottom cover 15 to the interior of the liquid cooling box 100, and the upper end of the support pipe 12 abuts against the water tank top cover 9 to support the liquid cooling box 100. The inlet hole 14 is opposite to and connected to the internal space of the liquid cooling box 100.

[0062] The present invention adopts the preferred structural form of the above-mentioned water tank bottom cover and supporting pipe, and utilizes the supporting pipe to pass through the water tank bottom cover and extend into the liquid cooling box until it abuts against the water tank top cover, thereby being able to support the liquid cooling box by supporting the water tank top cover. In this way, the liquid can be effectively introduced into the liquid cooling box by utilizing the inlet holes passing through the inner and outer walls of the supporting pipe, thereby completing the transmission effect of the liquid cooling liquid.

[0063] In some embodiments,

[0064] A water tank outlet pipe 18 is provided on the water tank top cover 9. The liquid-cooled inverter also includes an inverter top cover 1. The inverter top cover 1 is provided with an inverter water outlet 16. The lower end of the water tank outlet pipe 18 is connected to the interior of the liquid cooling box 100, and the upper end of the water tank outlet pipe 18 is opposite to and connected to the inverter water outlet 16 so that the water in the liquid cooling box 100 can be discharged.

[0065] The present invention also preferably connects the water tank outlet pipe provided on the above-mentioned water tank top cover and the inverter water outlet provided on the inverter top cover, so that the two are connected, and the liquid in the liquid cooling tank can be discharged upward to the outside of the inverter through the water tank outlet pipe and the inverter water outlet, thereby realizing the continuous flow of liquid cooling liquid and further improving the heat exchange performance of the internal components of the inverter.

[0066] In some embodiments,

[0067] The inverter top cover 1 is provided with a three-phase input port 20 and a three-phase output port 21. The three-phase input port 20 is used to introduce wiring into the inverter, and the three-phase output port 21 is used to lead the wiring in the inverter out of the inverter.

[0068] The present invention uses a three-phase input port and a three-phase output port opened on the top cover of the inverter. Three wires can be introduced into the inverter through the three-phase input port and exported through the three-phase output port, thereby realizing the power connection function of the internal components of the inverter, further realizing the integration of power supply and cooling, making the structure more compact and the inverter as a whole more miniaturized.

[0069] See Figure 1The inverter of the present invention is also designed with a cylindrical overall shape. When disassembling the inverter, simply remove the inverter cover 1 and the outer shell 3 with its arc-shaped outer surface, making component installation very convenient. Furthermore, the inverter cover 1 is provided with a three-phase input port 20 and a three-phase output port 21. A certain electrical safety distance is maintained between each hole. Because the inverter is cylindrical, the orientation of the inlet and outlet holes can be changed by rotating the inverter, making wiring easier.

[0070] In some embodiments,

[0071] The inverter top cover 1 is a circular plate structure, the inverter bottom cover 2 is also a circular plate structure, the shell 3 is a cylindrical structure, the inverter top cover 1 is arranged at the top end of the shell 3, and the inverter bottom cover 2 is arranged at the bottom end of the shell 3; the liquid cooling box 100 is a cylindrical structure.

[0072] This is the preferred structural form of the inverter top cover, bottom cover and outer shell of the present invention, forming a cylindrical inverter structure. The liquid cooling box is preferably also a cylindrical structure and is arranged inside the inverter, further improving the compactness of the overall structure of the inverter and further realizing miniaturization.

[0073] The present invention preferably uses a column-type sheet metal liquid cooling box, fully utilizing the surface space. Modules and electronic components are mounted on the surface of the central column. Coolant can be injected into the column to circulate the heat of the entire machine, integrating the installation of all inverter components with the cooling system for efficient heat dissipation. The inverter is integrated into a one-piece structure, significantly reducing its size while also enabling 360-degree, seamless disassembly and installation, reducing process complexity, improving installation efficiency, and balancing heat dissipation and disassembly and installation. Furthermore, column-type heat dissipation eliminates the need for complex liquid cooling piping designs, making internal cleaning more convenient.

[0074] Beneficial effects of the present invention:

[0075] 1. Integrated cooling, high integration.

[0076] 2. Greatly reduce the size of the inverter and improve space utilization.

[0077] 3. Column-type structure enables all-round device disassembly and assembly.

[0078] 4. Eliminate complex cooling pipelines to improve installation convenience.

[0079] In some embodiments,

[0080] It also includes a capacitor snap bracket 17 and a busbar 10. When a capacitor 11 is also included, the busbar 10 is arranged at the bottom of the capacitor 11, the capacitor snap bracket 17 is fixed to the support pipe 12, and the capacitor 11 is fixed to the capacitor snap bracket 17, so that the capacitor 11 is fixed to the support pipe 12 through the capacitor snap bracket 17; an isolation plate 13 is also provided on the outer periphery of the capacitor 11, and the capacitor 11 can exchange heat with the liquid cooling liquid in the liquid cooling box 100 through the isolation plate 13.

[0081] The present invention provides a capacitor clip bracket and fixes it to the supporting pipe, thereby fixing the capacitor, allowing the capacitor to be effectively contact-cooled and dissipated by liquid inside the liquid cooling box, thereby improving stability, increasing the cooling performance of the capacitor bottom, and improving the cooling and heat dissipation performance of the capacitor.

[0082] See Figure 3 and Figure 4 The capacitor 11 is installed at the bottom of the column-type liquid cooling box 100 and is fixed by a capacitor clip bracket 17. The isolation plate 13 separates the liquid while ensuring that the heat generated by the capacitor 11 can be transferred to the liquid. The support pipe 12 serves as a support for the entire inverter on the one hand, and is also an important pipe for cooling the entire inverter on the other hand. The support pipe 12 and the column-type liquid cooling box 100 are interconnected by welding. The support pipe 12 has an inlet hole 14 in a part of the interior of the column-type liquid cooling box 100 for transporting the coolant to the interior of the liquid cooling box. The support pipe 12 contacts the inverter bottom cover 2 at a section of the opening. The inverter bottom cover 2 has four corresponding bottom water inlets 19. The coolant enters from the lower layer and flows out from the upper water tank outlet pipe 18 after cooling is completed. At this point, the column-type liquid cooling box 100 completes the cooling of the inverter's heating components, and one box has multiple uses, realizing integrated cooling.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A liquid-cooled inverter, characterized in that: include: A shell (3), a liquid cooling box (100), an IGBT (4) and a thyristor (5), wherein the liquid cooling box (100) is arranged inside the shell (3), the IGBT (4) and the thyristor (5) are both arranged inside the shell (3) and are both connected to the liquid cooling box (100), a liquid for cooling and dissipating heat can be passed into the liquid cooling box (100), the IGBT (4) and the liquid cooling box (100) are in contact with each other for heat exchange so as to be cooled by the liquid cooling box (100), and the thyristor (5) and the liquid cooling box (100) are in contact with each other for heat exchange so as to be cooled by the liquid cooling box (100); the liquid cooling box (100) is located in the middle of the shell (3), the IGBT (4) and the thyristor (5) are both located on the periphery of the liquid cooling box (100), and the middle is located in the space surrounded by the IGBT (4) and the thyristor (5).

2. The liquid-cooled inverter according to claim 1, characterized in that: The invention also includes a relay (7) and a circuit breaker (8), wherein the relay (7) and the circuit breaker (8) are both arranged inside the housing (3) and are both arranged in contact with the outer periphery of the liquid cooling box (100). The relay (7) and the liquid cooling box (100) are in contact with each other for heat exchange so as to be cooled by the liquid cooling box (100), and the circuit breaker (8) and the liquid cooling box (100) are in contact with each other for heat exchange so as to be cooled by the liquid cooling box (100).

3. The liquid-cooled inverter according to claim 1, characterized in that: It also includes a capacitor (11), which is arranged inside the liquid cooling box (100) to directly contact heat exchange with the liquid cooling liquid in the liquid cooling box (100) so as to be cooled by the liquid cooling liquid.

4. The liquid-cooled inverter according to claim 1, characterized in that: The invention also includes a support pipe (12) and a frequency converter bottom cover (2), wherein the frequency converter bottom cover (2) is arranged at the bottom end of the housing (3), and the liquid cooling box (100) is supported on the frequency converter bottom cover (2) through the support pipe (12). An introduction hole (14) is also provided on the support pipe (12) at a position opposite to the height of the liquid cooling box (100), and the introduction hole (14) passes through the support pipe (12) to communicate with the interior of the liquid cooling box (100), so that liquid cooling liquid can be introduced into the interior of the support pipe (12), and the liquid cooling liquid can be introduced into the liquid cooling box (100) through the introduction hole (14).

5. The liquid-cooled inverter according to claim 4, characterized in that: There are at least two supporting pipes (12), and the at least two supporting pipes (12) are arranged at intervals to support different positions of the liquid cooling box (100); A bottom water inlet (19) is provided on the inverter bottom cover (2) in a manner penetrating the upper and lower end surfaces thereof. The bottom water inlet (19) is vertically opposed to and communicates with the support pipe (12), so that liquid cooling liquid is supplied into the support pipe (12) through the bottom water inlet (19).

6. The liquid-cooled inverter according to claim 4, characterized in that: The liquid cooling box (100) includes a water tank bottom cover (15) and a water tank top cover (9); the support pipe (12) passes through the water tank bottom cover (15) to the interior of the liquid cooling box (100), and the upper end of the support pipe (12) abuts against the water tank top cover (9) to support the liquid cooling box (100); the inlet hole (14) is opposite to and connected to the internal space of the liquid cooling box (100).

7. The liquid-cooled inverter according to claim 6, characterized in that: The water tank top cover (9) is provided with a water tank outlet pipe (18), and the liquid-cooled frequency converter further comprises a frequency converter top cover (1), and the frequency converter top cover (1) is provided with a frequency converter water outlet (16), the lower end of the water tank outlet pipe (18) is communicated with the interior of the liquid cooling box (100), and the upper end of the water tank outlet pipe (18) is opposite to and communicated with the frequency converter water outlet (16), so as to be able to drain the water in the liquid cooling box (100).

8. The liquid-cooled inverter according to claim 7, characterized in that: The inverter top cover (1) is provided with a three-phase input port (20) and a three-phase output port (21), wherein the three-phase input port (20) is used to introduce wiring into the inverter, and the three-phase output port (21) is used to lead the wiring in the inverter out of the inverter.

9. The liquid-cooled inverter according to claim 7, characterized in that: The inverter top cover (1) is a circular plate-shaped structure, the inverter bottom cover (2) is also a circular plate-shaped structure, the housing (3) is a cylindrical structure, the inverter top cover (1) is arranged at the top end of the housing (3), and the inverter bottom cover (2) is arranged at the bottom end of the housing (3); the liquid cooling box (100) is a cylindrical structure.

10. The liquid-cooled inverter according to claim 4, characterized in that: The invention also includes a capacitor clip bracket (17) and a busbar (10). When a capacitor (11) is also included, the busbar (10) is arranged at the bottom of the capacitor (11), the capacitor clip bracket (17) is fixed to the support pipe (12), and the capacitor (11) is fixed to the capacitor clip bracket (17), so that the capacitor (11) is fixed to the support pipe (12) through the capacitor clip bracket (17); an isolation plate (13) is also provided on the periphery of the capacitor (11), and the capacitor (11) can exchange heat with the liquid cooling liquid in the liquid cooling box (100) through the isolation plate (13).

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