A frequency converter cooling assembly and a frequency converter

Abstract

The utility model provides a kind of frequency converter cooling assembly and frequency converter, frequency converter cooling assembly includes: capacitor, power module, power module and cooling device, cooling device includes first cooling pipe and second cooling pipe, first cooling pipe surrounds the outer periphery of at least part structure of capacitor, to be able to cool capacitor, fluid in second cooling pipe can be heat exchanged with power module, to cool power module, fluid in the second cooling pipe can also be heat exchanged with the power module, to cool the power module, first cooling pipe is communicated with second cooling pipe as an organic whole, so that capacitor, power, power module and cooling device are integrated into an organic whole structure. According to the utility model, capacitor, power and power module can be cooled simultaneously by a set of cooling device, the utilization rate of refrigerant is improved, and the problem of low utilization rate of refrigerant in the frequency converter structure of the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically to a frequency converter cooling component and a frequency converter. Background Technology

[0002] With the rapid development of electronic technology, the development of frequency converter technology is also accelerating and being widely applied. While meeting basic functions, the heat dissipation requirements of frequency converters are becoming higher and the size is becoming smaller. Traditional frequency converters have low capacitor heat dissipation efficiency, and capacitors and power components use different cooling systems for heat dissipation, resulting in low refrigerant utilization and a relatively large and non-compact structure.

[0003] Because the capacitors, power modules and power components in the existing inverter structure are cooled and dissipated using different cooling systems, resulting in low refrigerant utilization, this invention researches and designs an inverter cooling component and an inverter. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defect that the capacitors, power modules and power components in the existing inverter structure are cooled and dissipated by different cooling systems, resulting in low utilization of the refrigerant, and thus provide an inverter cooling component and inverter.

[0005] To address the aforementioned problems, this utility model provides a frequency converter cooling assembly, comprising:

[0006] The device includes a capacitor, a power module, a power module, and a cooling device. The cooling device includes a first cooling pipe and a second cooling pipe. The first cooling pipe surrounds at least a portion of the structure of the capacitor to cool the capacitor. The fluid in the second cooling pipe can exchange heat with the power module to cool the power module. The fluid in the second cooling pipe can also exchange heat with the power module to cool the power module. The first cooling pipe and the second cooling pipe are integrated into one unit, making the capacitor, the power module, the power module, and the cooling device an integrated structure.

[0007] In some implementations...

[0008] It also includes a capacitor housing having a first receiving space, in which the capacitor is disposed, and a first opening on one side thereof. The first cooling pipe extends into the first receiving space from the first opening and forms a curved structure around the capacitor, extending from the first opening to the outside of the capacitor housing.

[0009] In some implementations...

[0010] The capacitor includes a first row of capacitors and a second row of capacitors. After the first cooling pipe extends into the first accommodating space from the first opening, it extends along the side of the first row of capacitors away from the second row of capacitors and in a direction away from the first opening. It bends at the end of the first row of capacitors away from the first opening and then extends between the first row of capacitors and the second row of capacitors in a direction towards the first opening to form a surrounding structure for the first row of capacitors. Furthermore, it bends again at the end of the second row of capacitors facing the first opening and extends in a direction away from the first opening on the side of the second row of capacitors away from the first row of capacitors to form a surrounding structure for the second row of capacitors.

[0011] In some implementations...

[0012] The capacitor also includes a third row of capacitors located on the side of the second row of capacitors away from the first row of capacitors. The first cooling pipe extends on the side of the second row of capacitors away from the first row of capacitors and in a direction away from the first opening, that is, it extends between the second row of capacitors and the third row of capacitors, and forms a bend at the end of the third row of capacitors away from the first opening. Furthermore, the third row of capacitors extends in a direction towards the first opening on the side of the third row of capacitors away from the second row of capacitors to form an enclosure structure for the third row of capacitors and extends out of the capacitor housing from the first opening.

[0013] In some implementations...

[0014] The first cooling pipe has at least two, which are arranged in parallel and spaced apart. One end of the first cooling pipe is connected to a first distributor, and the other end of the first cooling pipe is connected to a second distributor. The first distributor has multiple taps corresponding to the first cooling pipes, so that one end of at least two of the first cooling pipes is connected inside the first distributor through the multiple taps. The second distributor also has multiple taps corresponding to the first cooling pipes, so that the other ends of at least two of the first cooling pipes are connected inside the second distributor through the multiple taps.

[0015] In some implementations...

[0016] It also includes a radiator, with one end of the second cooling pipe extending into the interior of the radiator. The power module is mounted on the radiator so that fluid in the second cooling pipe can flow through the interior of the radiator to cool the power module. The inlet end of the radiator is connected to at least one second cooling pipe, and the outlet end of the radiator is connected to at least one second cooling pipe. One end of the first cooling pipe is connected to the second cooling pipe at the inlet end of the radiator, and the other end of the first cooling pipe is connected to the second cooling pipe at the outlet end of the radiator, so that the first cooling pipe and the second cooling pipe are connected in parallel.

[0017] In some implementations...

[0018] It also includes a power supply enclosure, which is arranged vertically with the capacitor enclosure. The power supply enclosure has a second accommodating space, in which the power module is disposed. The power supply enclosure has a second opening on one side, and the second cooling pipe extends into the second accommodating space from the second opening. The side of the heat sink away from the power module is opposite to the power module and can also cool the power module.

[0019] In some implementations...

[0020] The second cooling pipe, which is connected to the inlet end of the radiator, is connected to the inlet end of the first cooling pipe, and a first throttle valve is also provided between the inlet end of the first cooling pipe and the second cooling pipe; the second cooling pipe, which is connected to the outlet end of the radiator, is connected to the outlet end of the first cooling pipe, and a second throttle valve is also provided between the outlet end of the first cooling pipe and the second cooling pipe.

[0021] In some implementations...

[0022] When including both the first and second splitters:

[0023] The first distributor is connected between the inlet end of the first cooling pipe and the second cooling pipe, and the first throttle valve is located between the first distributor and the second cooling pipe; the second distributor is connected between the outlet end of the first cooling pipe and the second cooling pipe, and the second throttle valve is located between the second distributor and the second cooling pipe.

[0024] In some implementations...

[0025] The first distributor also includes a first main connector, which is disposed at the main inlet end of the first distributor and connected to the first throttle valve. The second distributor includes a second main connector, which is disposed at the main outlet end of the second distributor and connected to the second throttle valve.

[0026] The other end of the second cooling pipe located at the inlet end of the radiator is connected to a first connector water nozzle to allow fluid to be introduced into the second cooling pipe through the first connector water nozzle; the other end of the second cooling pipe located at the outlet end of the radiator is connected to a second connector water nozzle to allow fluid in the second cooling pipe to be discharged through the second connector water nozzle.

[0027] In some implementations...

[0028] The capacitor bank includes a first ventilation side panel, and the power supply bank includes a second ventilation side panel. The first ventilation side panel is located at the upper end of the second ventilation side panel. The capacitor bank, except for the first opening, has all other sides configured as the structure of the first ventilation side panel, and the power supply bank, except for the second opening, has all other sides configured as the structure of the second ventilation side panel. At least a portion of the structure of the heat sink can be disposed on the first ventilation side panel opposite to the first opening, and at least a portion of the structure of the heat sink can be disposed on the second ventilation side panel opposite to the second opening. Ventilation openings are provided on both the first and second ventilation side panels.

[0029] In some implementations...

[0030] The capacitor bank also includes a first radiator fixing member and a cooling device fixing member. The cooling device fixing member is provided at the first opening. When the bank also includes a first distributor and a second distributor: the cooling device fixing member can fix the first distributor, the second distributor and the first cooling pipe. The first radiator fixing member is provided on the first ventilation side plate opposite to the first opening, and the second radiator fixing member is provided on the second ventilation side plate opposite to the second opening. At least a part of the structure of the radiator is fixed to the first ventilation side plate by the first radiator fixing member, and at least a part of the structure of the radiator is fixed to the second ventilation side plate by the second radiator fixing member.

[0031] This utility model also provides a frequency converter, which includes the aforementioned frequency converter cooling assembly.

[0032] The inverter cooling assembly and inverter provided by this utility model have the following beneficial effects:

[0033] 1. This utility model cools the capacitor, power supply, and power module of the frequency converter separately through a first cooling pipe and a second cooling pipe, with the first and second cooling pipes connected as a single unit. This integrates the capacitor, power supply, power module, and cooling device into one unit, enabling simultaneous cooling and heat dissipation of the capacitor, power supply, and power module through a single cooling system. This improves the utilization rate of the refrigerant. Furthermore, the first cooling pipe of this utility model surrounds the capacitor through an enclosed structure, increasing the heat exchange area between the pipe and the capacitor and improving the heat exchange efficiency of the capacitor. This further significantly improves the cooling efficiency of the capacitor and the overall cooling efficiency of the frequency converter. This effectively solves the problem of low refrigerant utilization caused by using different cooling systems for the capacitor, power supply, and power components in the existing frequency converter structure.

[0034] 2. This utility model further improves upon the parallel connection of the first and second cooling pipes, and by installing first and second throttle valves at the junction of the first and second cooling pipes, it enables convenient and precise control of the refrigerant flow rate. Specifically, it adjusts the flow rate of the fluid entering the radiator to cool the power module and power supply module, and adjusts the flow rate of the fluid entering the first cooling pipe to cool the capacitor. This achieves targeted cooling of the capacitor, power supply, and power module, providing the required refrigerant flow rate based on the temperature (required heat dissipation) of each module. This improves the heat dissipation effect on the capacitor, power supply, and power module while saving energy and further enhancing the utilization rate of the refrigerant.

[0035] 3. This utility model further improves the cooling effect of the capacitor in the first space by introducing airflow through the vent on the first ventilation side plate of the capacitor box, and further improves the cooling effect of the power supply in the second space by introducing airflow through the vent on the second ventilation side plate of the power supply box. In addition, the ventilation holes on the ventilation side plate can guide the airflow to flow through the heat sink, thereby further cooling the heat sink, and further improving the heat dissipation and cooling effect of the power module, while improving the cooling performance of the capacitor, power supply and power module. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram (first-person view) of the inverter cooling assembly of this utility model;

[0037] Figure 2 This is a three-dimensional structural diagram (second perspective) of the inverter cooling assembly of this utility model;

[0038] Figure 3 This is a three-dimensional structural diagram of the capacitor module part of this utility model;

[0039] Figure 4 yes Figure 3The three views;

[0040] Figure 5 This is a three-dimensional structural diagram of the capacitor box and capacitor assembly of this utility model;

[0041] Figure 6 This is a partial structural diagram of the cooling device of this utility model;

[0042] Figure 7 This is an external structural diagram of the first and second shunts of this utility model;

[0043] Figure 8 This is an internal cross-sectional view of the first and second splitters of this utility model;

[0044] Figure 9 This is a three-dimensional structural diagram of the inverter cooling assembly of this utility model;

[0045] Figure 10 This is a three-dimensional structural diagram of the power module of this utility model;

[0046] Figure 11 This is an external structural diagram of the first and second throttle valves of this utility model;

[0047] Figure 12 yes Figure 11 Internal cross-sectional view of the first and second throttle valves.

[0048] The reference numerals in the attached figures are as follows:

[0049] 1. Capacitor; 11. First row of capacitors; 12. Second row of capacitors; 13. Third row of capacitors; 2. Capacitor housing; 3. Cooling device mounting hardware; 4. Top sheet metal of the housing; 5. Bottom sheet metal of the housing; 6. Vertical beam; 71. First ventilation side panel; 72. Second ventilation side panel; 81. First radiator mounting hardware; 82. Second radiator mounting hardware; 21. First cooling pipe; 23. First throttle valve; 23b. Second throttle valve; 31. First distributor; 31b. 31. Second splitter; 32. Tap connector; 33. First main connector; 33b. Second main connector; 41. Power module; 42. Heat sink; 43. Second cooling pipe; 44. First connector water nozzle; 44b. Second connector water nozzle; 100. First receiving space; 200. First opening; 300. Power supply enclosure; 400. Second receiving space; 500. Second opening; 600. Power module; 601. Power supply protective cover; 602. Bottom support. Detailed Implementation

[0050] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0053] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0056] like Figure 1-12 As shown, this utility model provides a frequency converter cooling assembly, which includes:

[0057] The system comprises a capacitor 1, a power module 600, a power module 41, and a cooling device. The cooling device includes a first cooling pipe 21 and a second cooling pipe 43. The first cooling pipe 21 surrounds at least a portion of the structure of the capacitor 1 to cool the capacitor 1. The fluid in the second cooling pipe 43 can exchange heat with the power module 41 to cool the power module 41. The fluid in the second cooling pipe 43 can also exchange heat with the power module 600 to cool the power module 600. The first cooling pipe 21 and the second cooling pipe 43 are integrated into one unit, thus forming a single structure comprising the capacitor 1, the power module 600, the power module 41, and the cooling device.

[0058] This invention utilizes a scheme where the capacitor, power supply, and power module of the frequency converter are cooled by a first cooling pipe and a second cooling pipe, respectively. The first and second cooling pipes are connected as a single unit, integrating the capacitor, power supply, power module, and cooling device into one unit. This allows for simultaneous cooling and heat dissipation of the capacitor, power supply, and power module using a single cooling system, improving refrigerant utilization. Furthermore, the first cooling pipe of this invention surrounds the capacitor, increasing the heat exchange area between the pipe and the capacitor, thus improving the heat exchange efficiency and significantly enhancing the cooling efficiency of the capacitor and the overall cooling efficiency of the frequency converter. This effectively solves the problem of low refrigerant utilization caused by using different cooling systems for the capacitor, power supply, and power components in existing frequency converter structures.

[0059] Currently, the cooling methods in the inverter field generally adopt water cooling and air cooling. Structures such as three-way pipes (second cooling pipes) and throttle valves are not conventional methods for inverter capacitor cooling. Most capacitors are mainly air-cooled, and water cooling is achieved by mounting the capacitor on a water-cooled plate. This cooling method only conducts heat through the contact surface between the capacitor and the water-cooled plate, resulting in poor cooling effect. This utility model uses water-cooled pipes surrounding the capacitor, which significantly improves the cooling effect.

[0060] This invention uses an enclosed refrigerant pipe (or a semi-enclosed or partially enclosed structure) to dissipate heat from the capacitor assembly, thereby improving the heat exchange efficiency of the internal components of the frequency converter, reducing the internal temperature of the system, and enhancing the stability of the liquid cooling system. It also makes full use of the refrigerant pipe, which serves two purposes: connecting the power module heat sink and the capacitor heat sink assembly with a three-way pipe (second cooling pipe 43) improves the utilization rate of the refrigerant.

[0061] In some implementations...

[0062] It also includes a capacitor housing 2, which has a first receiving space 100, in which the capacitor 1 is disposed. The capacitor housing 2 has a first opening 200 on one side thereon, and the first cooling pipe 21 extends into the first receiving space 100 from the first opening 200 and forms a curved structure around the capacitor 1 to surround it, and extends out of the first opening 200 to the outside of the capacitor housing 2.

[0063] This is a preferred structural form of the capacitor box of this utility model, and a further preferred arrangement between the capacitor and the first cooling pipe and the capacitor box. By setting the capacitor box to include a first accommodating space and placing the capacitor in the first accommodating space, and by using the first cooling pipe to penetrate into the first accommodating space and surround the capacitor to form a curved structure, the capacitor can form a relatively closed surrounding cooling and heat dissipation structure, which further improves the cooling performance of the capacitor and improves the heat dissipation efficiency.

[0064] In some implementations...

[0065] The capacitor 1 includes a first row of capacitors 11 and a second row of capacitors 12. After the first cooling pipe 21 extends into the first receiving space 100 from the first opening 200, it extends along the side of the first row of capacitors 11 away from the second row of capacitors 12 and in a direction away from the first opening 200. It bends at the end of the first row of capacitors 11 away from the first opening 200, and then extends between the first row of capacitors 11 and the second row of capacitors 12 in a direction away from the first opening 200 to form a surrounding structure for the first row of capacitors 11. Furthermore, it bends again at the end of the second row of capacitors 12 facing the first opening 200, and extends in a direction away from the first opening 200 on the side of the second row of capacitors 12 away from the first row of capacitors 11 to form a surrounding structure for the second row of capacitors 12.

[0066] This is a further preferred structural form of the capacitor of this utility model. By arranging two rows of capacitors, and forming a semi-enclosed structure (bent form) for the first row of capacitors and the second row of capacitors within the first accommodating space, the first cooling pipe can form a curved serpentine structure, thereby increasing the convective cooling heat exchange area with the first row of capacitors and the second row of capacitors, respectively, further improving the cooling performance of the two rows of capacitors and increasing the heat dissipation efficiency.

[0067] In some implementations...

[0068] The capacitor 1 also includes a third row of capacitors 13, which is located on the side of the second row of capacitors 12 away from the first row of capacitors 11. The first cooling pipe 21 extends on the side of the second row of capacitors 12 away from the first row of capacitors 11 and in a direction away from the first opening 200, that is, it extends between the second row of capacitors 12 and the third row of capacitors 13, and bends at the end of the third row of capacitors 13 away from the first opening 200. Furthermore, the third row of capacitors 13 extends in a direction towards the first opening 200 on the side of the third row of capacitors 13 away from the second row of capacitors 12 to form an enclosure structure for the third row of capacitors 13, and extends out of the capacitor box 2 from the first opening 200.

[0069] This is a further preferred structural form of the capacitor of this utility model. Furthermore, by setting a third row of capacitors and arranging the third row of capacitors on the side of the second row of capacitors away from the first row of capacitors, the second row of capacitors is located between the first and third rows of capacitors. In addition, the first cooling pipe forms a semi-enclosed structure (bent form) around the third row of capacitors within the first accommodating space, which can further increase the convective cooling heat exchange area with the third row of capacitors, further improve the cooling performance of the third row of capacitors, and improve the heat dissipation efficiency.

[0070] In some implementations...

[0071] The first cooling pipe 21 has at least two, and the at least two first cooling pipes 21 are arranged in parallel and spaced apart. One end of the first cooling pipe 21 is connected to the first distributor 31, and the other end of the first cooling pipe 21 is connected to the second distributor 31b. The first distributor 31 has a plurality of taps 32 corresponding to the first cooling pipe 21, so that one end of at least two first cooling pipes 21 is connected inside the first distributor 31 through the plurality of taps 32. The second distributor 31b also has a plurality of taps 32 corresponding to the first cooling pipe 21, so that the other end of at least two first cooling pipes 21 is connected inside the second distributor 31b through the plurality of taps 32.

[0072] This invention also uses at least two spaced first cooling pipes to further increase the convective cooling heat transfer area of ​​the capacitor and improve the cooling and heat dissipation performance. The first distributor can introduce fluid and supply it to multiple first cooling pipes in separate channels. The second distributor can collect the fluid in the multiple first cooling pipes into the second distributor and discharge it as a whole.

[0073] In some implementations...

[0074] It also includes a radiator 42, one end of the second cooling pipe 43 is inserted into the interior of the radiator 42, the power module 41 is disposed on the radiator 42 so that fluid in the second cooling pipe 43 can flow through the interior of the radiator 42 to cool the power module 41; and the inlet end of the radiator 42 is connected to at least one second cooling pipe 43, the outlet end of the radiator 42 is connected to at least one second cooling pipe 43, one end of the first cooling pipe 21 is connected to the second cooling pipe 43 at the inlet end of the radiator 42, and the other end of the first cooling pipe 21 is connected to the second cooling pipe 43 at the outlet end of the radiator 42; so that the first cooling pipe 21 and the second cooling pipe 43 are connected in parallel.

[0075] This invention, through the aforementioned radiator structure, allows fluid from the second cooling pipe to be introduced into the radiator. Since the power module is in contact with the radiator, the radiator effectively cools the power module. Furthermore, by setting the first and second cooling pipes in parallel, this invention facilitates the adjustment of the fluid flow rate entering the radiator to cool the power module and the fluid flow rate entering the first cooling pipe to cool the capacitor. This enables targeted cooling of the capacitor and power module, providing the required refrigerant flow rate based on the temperature (required heat dissipation) of the capacitor and power module respectively. This improves the heat dissipation effect on the capacitor and power module while saving energy and further enhancing the utilization rate of the refrigerant.

[0076] In some implementations...

[0077] It also includes a power supply enclosure 300, which is arranged vertically with the capacitor enclosure 2. The power supply enclosure 300 has a second receiving space 400, in which the power module 600 is disposed. The power supply enclosure 300 has a second opening 500 on one side, and the second cooling pipe 43 extends into the second receiving space 400 from the second opening 500. The side of the heat sink 42 facing away from the power module 41 is opposite to the power module 600 and can also cool the power module 600.

[0078] This invention, through the aforementioned radiator structure, allows fluid from the second cooling pipe to be introduced into the radiator. Since the power module is opposite to the radiator and can exchange heat, the radiator effectively cools the power module. Furthermore, by setting the first and second cooling pipes in parallel, this invention facilitates the adjustment of the fluid flow rate entering the radiator to cool the power module and the fluid flow rate entering the first cooling pipe to cool the capacitor. This enables targeted cooling of the capacitor, power supply, and power module, providing the required refrigerant flow rate based on the temperature (required heat dissipation) of the capacitor, power supply, and power module. This improves the heat dissipation effect on the capacitor, power supply, and power module while saving energy and further enhancing the utilization rate of the refrigerant.

[0079] In some implementations...

[0080] The second cooling pipe 43, which is connected to the inlet end of the radiator 42, is connected to the inlet end of the first cooling pipe 21. A first throttle valve 23 is also provided between the inlet end of the first cooling pipe 21 and the second cooling pipe 43. The second cooling pipe 43, which is connected to the outlet end of the radiator 42, is connected to the outlet end of the first cooling pipe 21. A second throttle valve 23b is also provided between the outlet end of the first cooling pipe 21 and the second cooling pipe 43.

[0081] This invention further improves upon the parallel connection of the first and second cooling pipes, and by installing first and second throttle valves at the junction of the first and second cooling pipes, it enables convenient and precise control of the refrigerant flow rate. This involves adjusting the flow rate of the fluid entering the radiator to cool the power module and adjusting the flow rate of the fluid entering the first cooling pipe to cool the capacitor, thereby achieving targeted cooling of the capacitor and power module. The refrigerant flow rate can be provided according to the temperature (required heat dissipation) of the capacitor and power module, improving the heat dissipation effect on the capacitor and power module while saving energy and further improving the utilization rate of the refrigerant.

[0082] This invention designs a capacitor cooling structure to achieve liquid cooling of capacitor components, thereby improving the heat exchange efficiency of the components. At the same time, it uses a dual-purpose water system, connecting the power module heat sink and the capacitor cooling component with a three-way pipe, which improves the utilization rate of the refrigerant. The capacitor cooling component connector is equipped with a throttle valve, which allows for easy adjustment of the refrigerant flow rate according to the actual heat loss of the components, thereby enhancing the overall heat dissipation effect.

[0083] See Figure 6 and Figure 7The cooling device includes a first cooling pipe 21 (copper pipe), a distributor, and a throttle valve. The distributor includes a small tap and a large main connector. The distributor is made of two aluminum plates joined together, with a half-channel in the middle of each plate. After joining, a sealing process ensures no leakage at the joint. The distributor has a number of fixing holes of varying sizes on both sides, which connect to the internal channel. The small fixing holes on the sides are for installing the taps (small), serving as the outlet; the large fixing hole at the bottom is for installing the main connector (large), serving as the inlet. The inlet and outlet are connected and separated by the distributor. The two ends of the first cooling pipe 21 are connected to the small taps on different connectors. The first cooling pipe 21 cooperates with capacitor 1, placing capacitor 1 in the gap formed by the first cooling pipe 21, allowing the first cooling pipe 21 to fully absorb the heat generated by capacitor 1, achieving a heat dissipation effect. The throttle valve is installed at the inlet of the distributor; rotating the throttle valve controls the refrigerant flow. For ease of explanation, the throttling device used here is a physical method. To ensure the throttling effect, this throttling valve can be replaced with an electronic throttling valve, which is automatically controlled by electrical signals. The working principles of the communicating vessel and the throttling valve are explained below. Figure 8 Cross-sectional diagram of communicating vessels and Figure 12 A cross-sectional diagram of the throttle valve can be used to visually demonstrate its operation.

[0084] In some implementations...

[0085] When the first splitter 31 and the second splitter 31b are included:

[0086] The first distributor 31 is connected between the inlet end of the first cooling pipe 21 and the second cooling pipe 43, and the first throttle valve 23 is located between the first distributor 31 and the second cooling pipe 43; the second distributor 31b is connected between the outlet end of the first cooling pipe 21 and the second cooling pipe 43, and the second throttle valve 23b is located between the second distributor 31b and the second cooling pipe 43.

[0087] This is a further preferred structural form and installation position of the first and second throttle valves of this utility model. The first throttle valve is located between the first distributor and the second cooling pipe. The first throttle valve can adjust the flow rate of the fluid entering the second cooling pipe and the first distributor respectively. The flow rate is adjusted according to different temperatures, which can specifically heat the power module and capacitor to improve the heat dissipation effect. The second throttle valve is located between the second distributor and the second cooling pipe. The second throttle valve can adjust the flow rate of the fluid flowing from the first distributor to the second cooling pipe respectively. The flow rate is adjusted according to different temperatures, which can specifically heat the power module and capacitor to improve the heat dissipation effect.

[0088] This utility model uses valves to control the cooling water, and separately distributes the water-cooled plate radiator and the capacitor cooling structure (multi-layer cooling copper pipe (first cooling pipe 21)) to realize the cooling control of the two modules, and achieve targeted and effective cooling and heat dissipation.

[0089] In some implementations...

[0090] The first diverter 31 further includes a first main connector 33, which is disposed at the main inlet end of the first diverter 31 and connected to the first throttle valve 23. The second diverter 31b includes a second main connector 33b, which is disposed at the main outlet end of the second diverter 31b and connected to the second throttle valve 23b.

[0091] The other end of the second cooling pipe 43 located at the inlet end of the radiator 42 is connected to a first connector water nozzle 44 so as to introduce fluid into the second cooling pipe 43 through the first connector water nozzle 44; the other end of the second cooling pipe 43 located at the outlet end of the radiator 42 is connected to a second connector water nozzle 44b so as to discharge the fluid in the second cooling pipe 43 through the second connector water nozzle 44b.

[0092] This utility model also enables the connection between the first distributor and the first throttle valve, and the connection between the second distributor and the second throttle valve, respectively, through the first main connector and the second main connector. The other end of the second cooling pipe at the radiator inlet is connected to the first connector water nozzle, which can be used to allow water to enter the second cooling pipe. The other end of the second cooling pipe at the radiator outlet is connected to the second connector water nozzle, which can be used to allow water to be discharged from the second cooling pipe.

[0093] See Figure 9 The capacitor cooling structure operates as follows: External refrigerant enters the system through the first connector nozzle 44 and is split through the second cooling pipe 43 (preferably a three-way pipe). Part of the refrigerant flows through the distributor into the first cooling pipe 21, where the heat generated by capacitor 1 during operation is absorbed by the refrigerant. The other part of the refrigerant enters the radiator 42, which houses the power module 41. The heat generated by the power module 41 during operation is absorbed by the refrigerant inside the radiator 42. After operating in their respective systems, the two portions of refrigerant converge through the second cooling pipe 43 and flow through another second connector nozzle 44b, completing one refrigerant cycle. A throttle valve is installed at the lower end of the distributor. When capacitor 1 generates less heat, the valve can be adjusted to narrow the flow path, thereby reducing the flow rate or even interrupting the refrigerant supply to the system. When capacitor 1 generates more heat, the flow path can be adjusted to increase the refrigerant flow, thereby improving the heat dissipation effect at capacitor 1.

[0094] In some implementations...

[0095] The capacitor bank 2 includes a first ventilation side plate 71, and the power supply bank 300 includes a second ventilation side plate 72. The first ventilation side plate 71 is located at the upper end of the second ventilation side plate 72. The capacitor bank 2, except for the first opening 200, has all other sides configured as the structure of the first ventilation side plate 71. The power supply bank 300, except for the second opening 500, has all other sides configured as the structure of the second ventilation side plate 72. At least a portion of the structure of the heat sink 42 can be provided on the first ventilation side plate 71 opposite to the first opening 200, and at least a portion of the structure of the heat sink 42 can be provided on the second ventilation side plate 72 opposite to the second opening 500. Ventilation openings are provided on both the first ventilation side plate 71 and the second ventilation side plate 72.

[0096] This utility model, through the aforementioned preferred structure, allows airflow to be introduced through the vents on the first ventilation side panel of the capacitor box, further improving the cooling effect on the capacitors in the first space. Similarly, airflow can be introduced through the vents on the second ventilation side panel of the power supply box, further improving the cooling effect on the power supply in the second space. Furthermore, the ventilation holes on the ventilation side panels can guide the airflow through the heat sink, further cooling the heat sink and thus further improving the heat dissipation and cooling effect on the power module. This, in turn, enhances the cooling performance of the capacitors, power supply, and power module.

[0097] In some implementations...

[0098] The capacitor box 2 also includes a first radiator fixing member 81 and a cooling device fixing member 3. The cooling device fixing member 3 is provided at the first opening 200. When the first splitter 31 and the second splitter 31b are also included: the cooling device fixing member 3 can fix the first splitter 31, the second splitter 31b and the first cooling pipe 21. The first radiator fixing member 81 is provided on the first ventilation side plate 71 opposite to the first opening 200, and the second radiator fixing member 82 is provided on the second ventilation side plate 72 opposite to the second opening 500. At least a part of the structure of the radiator 42 is fixed to the first ventilation side plate 71 by the first radiator fixing member 81, and at least a part of the structure of the radiator 42 is fixed to the second ventilation side plate 72 by the second radiator fixing member 82.

[0099] This utility model also utilizes the above-described preferred structure to fix the first and second shunts and the first cooling pipe using cooling device fixing components, fixes at least a portion of the heat sink structure using the first heat sink fixing component on the capacitor box, and fixes at least a portion of the heat sink structure using the second heat sink fixing component on the power supply box, thereby improving the stability of fixing the heat sink and multiple pipes and other structures.

[0100] Preferably,

[0101] The capacitor box 2 includes a top sheet metal 4 and a bottom sheet metal 5. The top sheet metal 4 is located above the bottom sheet metal 5. A first ventilation side plate 71 is also provided between the top sheet metal 4 and the bottom sheet metal 5. The first ventilation side plate 71 has ventilation holes. The heat sink 42 is provided on the first ventilation side plate 71.

[0102] This invention also incorporates a ventilation side plate between the top and bottom sheet metal of the capacitor box, creating a more enclosed and sealed internal cavity. This further enhances the cooling and heat dissipation of the capacitors within the internal space. Furthermore, the ventilation openings on the first ventilation side plate introduce airflow, further improving the cooling and heat dissipation of the capacitors. The ventilation holes on the first ventilation side plate also guide the airflow through the heat sink, further cooling the heat sink and thus improving the heat dissipation and cooling effect of the power module. This, in turn, improves the cooling performance of both the capacitors and the power module.

[0103] In some implementations...

[0104] The capacitor box also includes a vertical beam 6. The top sheet metal 4 and the bottom sheet metal 5 of the box are connected and supported by the vertical beam 6. The top sheet metal 4 and the bottom sheet metal 5 of the box are connected to the first ventilation side plate 71 on all sides except the first opening 200. The top sheet metal 4, the bottom sheet metal 5, the multiple vertical beams 6 and the multiple first ventilation side plates 71 form the first accommodating space 100 of the capacitor box 2. The cooling device fixing member 3 is connected between the top sheet metal 4 and the bottom sheet metal 5 of the box at the first opening 200. When the first distributor 31 and the second distributor 31b are also included: the cooling device fixing member 3 can fix the first distributor 31, the second distributor 31b and the first cooling pipe 21. The first radiator fixing member 81 is provided on the first ventilation side plate 71 on the side opposite to the first opening 200. The radiator 42 is fixed to the first ventilation side plate 71 by the first radiator fixing member 81.

[0105] This is a further preferred structural form of the capacitor box of this utility model. The heat sink can be fixed by the heat sink fixing component, and the top sheet metal and bottom sheet metal can be connected and supported by the vertical beam. The cooling device fixing component can be used to fix the first and second shunts and the first cooling pipe, etc., forming a complete set of box components, namely the inverter cooling heat dissipation component. This realizes the integration of capacitors and power modules into one unit and the cooling through a set of cooling devices, improving the compactness of the structure and further improving the utilization rate of refrigerant.

[0106] See Figure 1 From the 3D view, the capacitor cooling structure is divided into five parts, namely: Figure 3 capacitor box assembly, Figure 6 cooling device Figure 7-8 Flow divider (connecting device) Figure 10 power modules and Figure 11-12 The throttle valve.

[0107] See Figure 3 The capacitor and enclosure assembly forms the basic structure. Capacitor 1 is placed inside the capacitor enclosure 2. The upper end of the capacitor is limited by the top sheet metal 4 of the enclosure, and the bottom is fixed to the bottom sheet metal 5 of the enclosure with nuts, ensuring stable installation of capacitor 1 on the capacitor enclosure 2. The capacitor enclosure 2 consists of the top sheet metal 4, the bottom sheet metal 5, and vertical beams 6. The top and bottom holes correspond one-to-one, and the vertical beams 6 connect to the four corners of the top and bottom, fixed together by welding to form a complete enclosure structure. Preferably, there are two first ventilation side panels 71, located on the left and right sides of the capacitor enclosure 2 respectively. The side panels have an array of waist holes and are connected and fixed to the press-fit nuts on the capacitor enclosure 2 by bolt assemblies. The first radiator fixing component 81 is connected and fixed to the press-fit nuts on the capacitor enclosure 2 by bolt assemblies, and the radiator 42 is connected to the first radiator fixing component 81 by bolt assemblies.

[0108] See Figure 1-2 The power module mainly includes diodes, IGBT modules, and other connecting copper plates. These components are interconnected to form a basic AC / DC conversion circuit. Its operation is as follows: The input copper plate is connected to the external three-phase AC power. The three-phase AC power is rectified into two DC power through the diodes. The two DC power are divided into positive and negative poles, which are connected to the busbar (negative) and busbar (positive) respectively through copper plate (negative), copper plate (positive), connecting copper plate (positive), and connecting copper plate (negative). The busbar is connected to a thin film capacitor. The DC power is filtered by the capacitor assembly. After filtering, it is connected to the IGBT module through the pins on the busbar, converting the DC power into AC power. The AC output is achieved through the output copper plate.

[0109] As can be seen from the above description, the four different modules of this integrated module work together in a compact structure. The power module 41 performs the main function, realizing the three-phase conversion function, while the capacitor module 1 performs the filtering function. The heat generated during the operation of the two modules is absorbed by the heat sink 42. The flow rate of the cooling water in the heat sink copper pipe of the heat sink 42 is adjusted by the throttle valve to ensure the stability of the system temperature during operation. The power supply module 600 makes full use of the module space, improving the overall space utilization rate, and at the same time facilitating connection with external components for power supply.

[0110] This utility model also provides a frequency converter, which includes the aforementioned frequency converter cooling assembly.

[0111] This invention utilizes an enclosed refrigerant pipe (or a semi-enclosed or partially enclosed structure) to dissipate heat from the capacitor assembly, improving the heat exchange efficiency of the internal components of the frequency converter, reducing the internal temperature of the system, and enhancing the stability of the liquid cooling system. It fully utilizes the refrigerant pipe, making dual use of water, and connects the power module heat sink and capacitor cooling assembly using a T-connector, improving refrigerant utilization. A throttling valve is added to the capacitor cooling assembly connector to facilitate adjustment of the refrigerant flow rate according to the actual heat loss of the components, enhancing the overall heat dissipation effect, achieving targeted heat exchange, and improving temperature control accuracy.

[0112] This invention utilizes an integrated liquid-cooled power module to combine the capacitor module, power module, heat dissipation module, and power supply module of a frequency converter into a single unit. This significantly reduces the space occupied by different modules and improves the overall versatility of the module. It fully utilizes the cooling medium, simultaneously achieving liquid cooling of the capacitor, power supply, and power module through the heat dissipation module, enhancing the heat dissipation effect and improving the heat exchange efficiency of the components. Furthermore, by using valves to control the flow channels, it dynamically adjusts the heat dissipation requirements of different modules, maintaining thermal stability within the frequency converter system and improving the utilization rate of the refrigerant.

[0113] The beneficial effects of this utility model are as follows:

[0114] 1. Enhanced capacitor heat dissipation and improved component heat exchange efficiency.

[0115] 2. Make full use of liquid cooling to enhance the heat dissipation of capacitors, power supplies and power modules.

[0116] 3. The valve controls the flow channel, dynamically adjusting the heat dissipation requirements of different modules, facilitating the control of refrigerant flow, achieving targeted heat exchange, and improving temperature control accuracy.

[0117] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A frequency converter cooling assembly, characterized in that: include: The device comprises a capacitor (1), a power module (600), a power module (41), and a cooling device. The cooling device includes a first cooling pipe (21) and a second cooling pipe (43). The first cooling pipe (21) surrounds at least a portion of the structure of the capacitor (1) to cool the capacitor (1). The fluid in the second cooling pipe (43) can exchange heat with the power module (41) to cool the power module (41). The fluid in the second cooling pipe (43) can also exchange heat with the power module (600) to cool the power module (600). The first cooling pipe (21) and the second cooling pipe (43) are integrated into one unit, forming a structure in which the capacitor (1), the power module (600), the power module (41), and the cooling device are integrated into one unit.

2. The inverter cooling assembly according to claim 1, characterized in that: It also includes a capacitor housing (2) having a first receiving space (100), in which the capacitor (1) is disposed, the capacitor housing (2) having a first opening (200) on one side thereof, the first cooling pipe (21) extending from the first opening (200) into the first receiving space (100) and forming a curved structure surrounding the capacitor (1), and extending from the first opening (200) to the outside of the capacitor housing (2).

3. The inverter cooling assembly according to claim 2, characterized in that: The capacitor (1) includes a first row of capacitors (11) and a second row of capacitors (12). The first cooling pipe (21) extends into the first receiving space (100) from the first opening (200), and extends along the side of the first row of capacitors (11) away from the second row of capacitors (12) and in a direction away from the first opening (200). It bends at the end of the first row of capacitors (11) away from the first opening (200), and then extends in a direction towards the first opening (200) between the first row of capacitors (11) and the second row of capacitors (12) to form a surrounding structure of the first row of capacitors (11). Furthermore, the second row of capacitors (12) bends again at the end towards the first opening (200), and extends in a direction away from the first opening (200) on the side of the second row of capacitors (12) away from the first row of capacitors (11) to form a surrounding structure of the second row of capacitors (12).

4. The inverter cooling assembly according to claim 3, characterized in that: The capacitor (1) further includes a third row of capacitors (13), which is located on the side of the second row of capacitors (12) away from the first row of capacitors (11). The first cooling pipe (21) extends on the side of the second row of capacitors (12) away from the first row of capacitors (11) and in a direction away from the first opening (200), that is, it extends between the second row of capacitors (12) and the third row of capacitors (13), and forms a bend at the end of the third row of capacitors (13) away from the first opening (200). Furthermore, the third row of capacitors (13) extends in a direction towards the first opening (200) on the side away from the second row of capacitors (12) to form an enclosure structure for the third row of capacitors (13), and extends out of the capacitor box (2) from the first opening (200).

5. The inverter cooling assembly according to claim 1, characterized in that: The first cooling pipe (21) has at least two, and the at least two first cooling pipes (21) are arranged in parallel and spaced apart. One end of the first cooling pipe (21) is connected to the first distributor (31), and the other end of the first cooling pipe (21) is connected to the second distributor (31b). The first distributor (31) has a plurality of taps (32) corresponding one-to-one with the first cooling pipe (21), so that one end of at least two first cooling pipes (21) is connected inside the first distributor (31) through the plurality of taps (32). The second distributor (31b) also has a plurality of taps (32) corresponding one-to-one with the first cooling pipe (21), so that the other end of at least two first cooling pipes (21) is connected inside the second distributor (31b) through the plurality of taps (32).

6. The inverter cooling assembly according to claim 2, characterized in that: It also includes a radiator (42), one end of the second cooling pipe (43) is inserted into the interior of the radiator (42), the power module (41) is disposed on the radiator (42) so that the fluid in the second cooling pipe (43) can flow through the interior of the radiator (42) to cool the power module (41); and the inlet end of the radiator (42) is connected to at least one second cooling pipe (43), the outlet end of the radiator (42) is connected to at least one second cooling pipe (43), one end of the first cooling pipe (21) is connected to the second cooling pipe (43) at the inlet end of the radiator (42), and the other end of the first cooling pipe (21) is connected to the second cooling pipe (43) at the outlet end of the radiator (42); so that the first cooling pipe (21) and the second cooling pipe (43) are connected in parallel.

7. The inverter cooling assembly according to claim 6, characterized in that: It also includes a power supply enclosure (300), which is arranged vertically with the capacitor enclosure (2). The power supply enclosure (300) has a second receiving space (400), and the power module (600) is disposed in the second receiving space (400). The power supply enclosure (300) has a second opening (500) on one side thereon. The second cooling pipe (43) extends into the second receiving space (400) from the second opening (500). The side of the heat sink (42) facing away from the power module (41) is opposite to the power module (600) and can also cool the power module (600).

8. The inverter cooling assembly according to claim 6, characterized in that: The second cooling pipe (43), which is connected to the inlet end of the radiator (42), is connected to the inlet end of the first cooling pipe (21). A first throttle valve (23) is also provided between the inlet end of the first cooling pipe (21) and the second cooling pipe (43). The second cooling pipe (43), which is connected to the outlet end of the radiator (42), is connected to the outlet end of the first cooling pipe (21). A second throttle valve (23b) is also provided between the outlet end of the first cooling pipe (21) and the second cooling pipe (43).

9. The inverter cooling assembly according to claim 8, characterized in that: When the first splitter (31) and the second splitter (31b) are included: The first distributor (31) is connected between the inlet end of the first cooling pipe (21) and the second cooling pipe (43), and the first throttle valve (23) is located between the first distributor (31) and the second cooling pipe (43); the second distributor (31b) is connected between the outlet end of the first cooling pipe (21) and the second cooling pipe (43), and the second throttle valve (23b) is located between the second distributor (31b) and the second cooling pipe (43).

10. The inverter cooling assembly according to claim 9, characterized in that: The first diverter (31) further includes a first main connector (33), which is disposed at the main inlet end of the first diverter (31) and connected to the first throttle valve (23). The second diverter (31b) includes a second main connector (33b), which is disposed at the main outlet end of the second diverter (31b) and connected to the second throttle valve (23b). The other end of the second cooling pipe (43) located at the inlet end of the radiator (42) is connected to a first connector water nozzle (44) so ​​that fluid is introduced into the second cooling pipe (43) through the first connector water nozzle (44); the other end of the second cooling pipe (43) located at the outlet end of the radiator (42) is connected to a second connector water nozzle (44b) so that fluid in the second cooling pipe (43) is discharged through the second connector water nozzle (44b).

11. The inverter cooling assembly according to claim 7, characterized in that: The capacitor box (2) includes a first ventilation side plate (71), and the power supply box (300) includes a second ventilation side plate (72). The first ventilation side plate (71) is located at the upper end of the second ventilation side plate (72). The capacitor box (2) is configured with the structure of the first ventilation side plate (71) on all sides except the first opening (200). The power supply box (300) is configured with the structure of the second ventilation side plate (72) on all sides except the second opening (500). At least a part of the structure of the heat sink (42) can be provided on the first ventilation side plate (71) opposite to the first opening (200). At least a part of the structure of the heat sink (42) can be provided on the second ventilation side plate (72) opposite to the second opening (500). Ventilation openings are provided on both the first ventilation side plate (71) and the second ventilation side plate (72).

12. The inverter cooling assembly according to claim 11, characterized in that: The capacitor box (2) further includes a first radiator fixing member (81) and a cooling device fixing member (3). The cooling device fixing member (3) is provided at the first opening (200). When the first splitter (31) and the second splitter (31b) are also included: the cooling device fixing member (3) can fix the first splitter (31), the second splitter (31b) and the first cooling pipe (21). The first radiator fixing member (81) is provided on the first ventilation side plate (71) opposite to the first opening (200). The second radiator fixing member (82) is provided on the second ventilation side plate (72) opposite to the second opening (500). At least part of the structure of the radiator (42) is fixed on the first ventilation side plate (71) by the first radiator fixing member (81). At least part of the structure of the radiator (42) is fixed on the second ventilation side plate (72) by the second radiator fixing member (82).

13. A frequency converter, characterized in that: Includes the inverter cooling assembly as described in any one of claims 1-12.

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