A frequency converter cooling assembly and a frequency converter

Abstract

This invention provides a frequency converter cooling assembly and a frequency converter. The frequency converter cooling assembly includes a capacitor, 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 capacitor's structure to cool the capacitor. The fluid in the second cooling pipe can exchange heat with the power module to cool the power module. The first and second cooling pipes are integrated, making the capacitor, power module, and cooling device a single integrated structure. According to this invention, a single cooling device can simultaneously cool and dissipate heat from both the capacitor and the power module, improving the utilization rate of the refrigerant. Furthermore, this invention increases the heat exchange area between the capacitor and the refrigerant, improving the heat exchange efficiency of the capacitor and thus significantly enhancing the cooling efficiency of the frequency converter.

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 and power components in the existing inverter structure are cooled and dissipated using different cooling systems, resulting in low refrigerant utilization, this invention 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 and power components in the existing inverter structure are cooled and dissipated by different cooling systems, resulting in low refrigerant utilization. Thus, this utility model provides an inverter cooling component and an inverter.

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

[0006] The capacitor, power module, and cooling device are provided. 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 first cooling pipe and the second cooling pipe are integrated into one unit, so that the capacitor, the power module, and the cooling device are integrated into one structure.

[0007] In some implementations...

[0008] It also includes a housing having an internal receiving space in which the capacitor is disposed, the housing having an opening on one side thereon, the first cooling pipe extending into the internal receiving space from the opening and forming a curved structure around the capacitor, and extending out of the opening to the outside of the 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 internal accommodating space from the 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 opening. It bends at the end of the first row of capacitors away from the opening and then extends between the first row of capacitors and the second row of capacitors in a direction towards the 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 opening and extends in a direction away from the 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 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 opening. Furthermore, the third row of capacitors extends in a direction towards the opening on the side of the third row of capacitors away from the second row of capacitors to form a surrounding structure for the third row of capacitors and extends out of the housing from the 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] 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.

[0019] In some implementations...

[0020] When including both the first and second splitters:

[0021] 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.

[0022] In some implementations...

[0023] 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.

[0024] 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.

[0025] In some implementations...

[0026] The enclosure includes a top sheet metal panel, a bottom sheet metal panel, and a ventilation side panel. The top sheet metal panel is located above the bottom sheet metal panel. A ventilation side panel is also provided between the top sheet metal panel and the bottom sheet metal panel. The ventilation side panel has ventilation openings, and the radiator is disposed on the ventilation side panel.

[0027] In some implementations...

[0028] The enclosure has an opening on one side. It also includes a radiator mounting bracket, a cooling device mounting bracket, and vertical beams. The top sheet metal and bottom sheet metal of the enclosure are connected and supported by the vertical beams. Ventilation side panels are connected to the top and bottom sheet metal of the enclosure, except for the opening. The top sheet metal, bottom sheet metal, multiple vertical beams, and multiple ventilation side panels form the internal accommodating space of the enclosure. The cooling device mounting bracket connects the top and bottom sheet metal at the opening. When a first and second distributor are also included: the cooling device mounting bracket can fix the first distributor, the second distributor, and the first cooling pipe. The radiator mounting bracket is provided on the ventilation side panel opposite the opening, and the radiator is fixed to the ventilation side panel by the radiator mounting bracket.

[0029] This utility model also provides a frequency converter, which includes the aforementioned frequency converter cooling assembly.

[0030] The inverter cooling assembly and inverter provided by this utility model have the following beneficial effects:

[0031] 1. This utility model integrates the capacitor and power module of the frequency converter into a single unit by cooling the capacitor and power module separately through a first cooling pipe and a second cooling pipe, with the first and second cooling pipes connected as a whole. This allows for simultaneous cooling and heat dissipation of both the capacitor and power module using a single cooling system, improving the utilization rate of the refrigerant. Furthermore, the first cooling pipe of this utility model surrounds the capacitor through a surrounding structure, increasing the heat exchange area between the capacitor and the refrigerant 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 and power components in existing frequency converter structures.

[0032] 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 can conveniently and precisely control the refrigerant flow rate. This means 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 the power module. It can provide the required refrigerant flow rate according to the temperature (required heat dissipation) of the capacitor and the power module, improving the heat dissipation effect on the capacitor and the power module while saving energy and further improving the utilization rate of the refrigerant.

[0033] 3. This utility model also improves the cooling effect of the capacitors by setting a ventilation side plate between the top and bottom sheet metal of the enclosure, thus forming a more enclosed and sealed space structure inside the enclosure. Furthermore, the ventilation holes on the ventilation side plate can introduce airflow, further improving the cooling effect of the capacitors. The ventilation holes on the ventilation side plate can also guide the airflow to flow through the heat sink, thereby further cooling the heat sink, and thus further improving the heat dissipation and cooling effect of the power module, while improving the cooling performance of the capacitors and power module. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the inverter cooling assembly of this utility model (excluding the second cooling pipe, radiator and power module);

[0035] Figure 2 yes Figure 1 The three views;

[0036] Figure 3 This is a three-dimensional structural diagram of the housing and capacitor assembly of this utility model;

[0037] Figure 4 This is a partial structural diagram of the cooling device of this utility model;

[0038] Figure 5 This is an external structural diagram of the first and second shunts of this utility model;

[0039] Figure 6 This is an internal cross-sectional view of the first and second splitters of this utility model;

[0040] Figure 7 This is a three-dimensional structural diagram of the inverter cooling assembly of this utility model;

[0041] Figure 8 This is an external structural diagram of the first and second throttle valves of this utility model;

[0042] Figure 9 yes Figure 8 Internal cross-sectional view of the first and second throttle valves.

[0043] The reference numerals in the attached figures are as follows:

[0044] 1. Capacitor; 11. First row of capacitors; 12. Second row of capacitors; 13. Third row of capacitors; 2. Cabinet; 3. Cooling device mounting hardware; 4. Top sheet metal of the cabinet; 5. Bottom sheet metal of the cabinet; 6. Vertical beam; 7. Ventilation side panel; 8. Radiator mounting hardware; 21. First cooling pipe; 23. First throttle valve; 23b. Second throttle valve; 31. First distributor; 31b. Second distributor; 32. Tap; 33. First main connector; 33b. Second main connector; 41. Power module; 42. Radiator; 43. Second cooling pipe; 44. First connector water nozzle; 44b. Second connector water nozzle; 100. Internal storage space; 200. Opening. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] like Figure 1-9 As shown, this utility model provides a frequency converter cooling assembly, which includes:

[0052] The capacitor 1, power module 41, and cooling device are provided. 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 first cooling pipe 21 and the second cooling pipe 43 are connected as a whole, so that the capacitor 1, the power module 41, and the cooling device are integrated into a single structure.

[0053] This invention utilizes a scheme where the capacitor and power module of the frequency converter are cooled by a first cooling pipe and a second cooling pipe, respectively, with the first and second cooling pipes connected as a single unit. This integrates the capacitor, power module, and cooling device into one unit, enabling simultaneous cooling and heat dissipation for both the capacitor and power module using a single cooling system. This improves the utilization rate of the refrigerant. Furthermore, the first cooling pipe of this invention surrounds the capacitor through a surrounding structure, increasing the heat exchange area between the pipe and the capacitor and improving the heat exchange efficiency of the capacitor. This further significantly enhances 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 and power components in existing frequency converter structures.

[0054] 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.

[0055] 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.

[0056] In some implementations...

[0057] It also includes a housing 2, which has an internal accommodating space 100, in which the capacitor 1 is disposed. The housing 2 has an opening 200 on one side thereon. The first cooling pipe 21 extends into the internal accommodating space 100 from the opening 200 and forms a curved structure around the capacitor 1, and extends out of the opening 200 to the outside of the housing 2.

[0058] This is a preferred structural form of the enclosure of this utility model, and a further preferred arrangement of the capacitor and the first cooling pipe with the enclosure. By setting the enclosure to include an internal receiving space and placing the capacitor in the internal receiving space, and by using the first cooling pipe to penetrate into the internal receiving space and surround the capacitor to form a curved structure, the capacitor can form a relatively closed surrounding cooling and heat dissipation structure, thereby further improving the cooling performance of the capacitor and improving the heat dissipation efficiency.

[0059] In some implementations...

[0060] 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 internal accommodating space 100 from the 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 opening 200. It bends at the end of the first row of capacitors 11 away from the 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 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 opening 200, and extends in a direction away from the 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.

[0061] 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 internal 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.

[0062] In some implementations...

[0063] 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 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 opening 200. Furthermore, the third row of capacitors 13 extends in a direction towards the 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 housing 2 from the opening 200.

[0064] 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 internal accommodating space. This 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.

[0065] In some implementations...

[0066] 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.

[0067] 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.

[0068] In some implementations...

[0069] 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.

[0070] 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.

[0071] In some implementations...

[0072] 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.

[0073] 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.

[0074] 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.

[0075] See Figure 4 and Figure 5 The 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 6 Cross-sectional diagram of communicating vessels and Figure 9 A cross-sectional diagram of the throttle valve can be used to visually demonstrate its operation.

[0076] In some implementations...

[0077] When the first splitter 31 and the second splitter 31b are included:

[0078] 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.

[0079] 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.

[0080] 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.

[0081] In some implementations...

[0082] 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.

[0083] 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.

[0084] 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.

[0085] See Figure 7The 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.

[0086] In some implementations...

[0087] The enclosure 2 includes a top sheet metal 4, a bottom sheet metal 5, and a ventilation side panel 7. The top sheet metal 4 is located above the bottom sheet metal 5. A ventilation side panel 7 is also provided between the top sheet metal 4 and the bottom sheet metal 5. The ventilation side panel 7 has ventilation openings. The radiator 42 is disposed on the ventilation side panel 7.

[0088] This utility model also improves the cooling effect of the capacitors by setting a ventilation side plate between the top and bottom sheet metal of the enclosure, thus forming a more relatively closed and sealed space structure inside the enclosure. Furthermore, the ventilation holes on the ventilation side plate can introduce airflow to further improve the cooling effect of the capacitors. 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, which in turn further improves the heat dissipation and cooling effect of the power module, and at the same time improves the cooling performance of the capacitors and power module.

[0089] In some implementations...

[0090] The housing 2 has an opening 200 on one side. The housing also includes a radiator fixing component 8, a cooling device fixing component 3, and a vertical beam 6. The top sheet metal 4 and the bottom sheet metal 5 of the housing are connected and supported by the vertical beam 6. Ventilation side panels 7 are connected to all sides of the top sheet metal 4 and the bottom sheet metal 5 except for the opening 200. The top sheet metal 4, the bottom sheet metal 5, the multiple vertical beams 6, and the multiple ventilation side panels 7 form the inner enclosure of the housing 2. The enclosure space 100 is provided. The cooling device fixing member 3 is connected between the top sheet metal 4 and the bottom sheet metal 5 of the enclosure at the opening 200. When the enclosure also includes a first distributor 31 and a second distributor 31b: the cooling device fixing member 3 can fix the first distributor 31, the second distributor 31b and the first cooling pipe 21. The radiator fixing member 8 is provided on the ventilation side plate 7 opposite to the opening 200. The radiator 42 is fixed on the ventilation side plate 7 by the radiator fixing member 8.

[0091] This is a further preferred structural form of the enclosure of this utility model. The radiator can be fixed by the radiator 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 splitters and the first cooling pipe, etc., forming a complete enclosure assembly, namely the inverter cooling and heat dissipation assembly. 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.

[0092] See Figure 1 From the 3D view, the capacitor cooling structure is divided into four parts, namely... Figure 3 capacitor + enclosure assembly Figure 4 cooling device Figure 5-6 Flow divider (connecting device) Figure 8 The throttle valve.

[0093] See Figure 3The capacitor and enclosure assembly forms the basic structure. Capacitor 1 is placed inside enclosure 2, with its upper end limited by the top sheet metal 4 of the enclosure. The bottom is fixed to the bottom sheet metal 5 of the enclosure with nuts, ensuring stable installation of capacitor 1 on enclosure 2. Enclosure 2 consists of top sheet metal 4, 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 ventilation side panels 7, located on the left and right sides of enclosure 2 respectively. The side panels have an array of perforations and are connected and fixed to the press-fit nuts on enclosure 2 using bolt assemblies. The radiator fixing component 8 is connected and fixed to the press-fit nuts on enclosure 2 using bolt assemblies, and the radiator 42 is connected to the radiator fixing component 8 using bolt assemblies.

[0094] This utility model also provides a frequency converter, which includes the aforementioned frequency converter cooling assembly.

[0095] 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.

[0096] This utility model can solve the following technical problems:

[0097] 1. Enhance capacitor heat dissipation and improve component heat exchange efficiency.

[0098] 2. Water can be used for two purposes, improving the utilization rate of refrigerant.

[0099] 3. The connector is equipped with a throttle valve to facilitate control of refrigerant flow, achieve targeted heat exchange, and improve temperature control accuracy.

[0100] 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 inverter cooling assembly, characterized by: include: The capacitor (1), power module (41), and cooling device are provided. 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 first cooling pipe (21) and the second cooling pipe (43) are connected as one unit, so that the capacitor (1), the power module (41), and the cooling device are integrated into one structure.

2. The inverter cooling assembly according to claim 1, characterized in that: It also includes a housing (2) having an internal accommodating space (100) in which the capacitor (1) is disposed. The housing (2) has an opening (200) on one side thereon. The first cooling pipe (21) extends into the internal accommodating space (100) from the opening (200) and forms a curved structure around the capacitor (1) to surround it, and extends out of the opening (200) to the outside of the 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 internal accommodating space (100) from the 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 opening (200). It bends at the end of the first row of capacitors (11) away from the opening (200) and then extends in a direction towards the opening (200) between the first row of capacitors (11) and the second row of capacitors (12) to form a surrounding structure for the first row of capacitors (11). Furthermore, the second row of capacitors (12) bends again at the end towards the opening (200) and extends in a direction away from the 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).

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 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 opening (200). Furthermore, the third row of capacitors (13) extends in a direction towards the 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 housing (2) from the 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 1, 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: 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).

8. The inverter cooling assembly according to claim 7, 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).

9. The inverter cooling assembly according to claim 8, 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).

10. The inverter cooling assembly according to claim 6, characterized in that: It also includes a box body (2), which includes a top sheet metal (4), a bottom sheet metal (5) and a ventilation side plate (7). The top sheet metal (4) is located above the bottom sheet metal (5). A ventilation side plate (7) is also provided between the top sheet metal (4) and the bottom sheet metal (5). The ventilation side plate (7) has ventilation openings. The radiator (42) is provided on the ventilation side plate (7).

11. The inverter cooling assembly according to claim 10, characterized in that: The housing (2) has an opening (200) on one side. The housing also includes a radiator fixing component (8), a cooling device fixing component (3), and a vertical beam (6). The top sheet metal (4) and the bottom sheet metal (5) of the housing are connected and supported by the vertical beam (6). The ventilation side plates (7) are connected to the other sides of the top sheet metal (4) and the bottom sheet metal (5) of the housing, except for the opening (200). The top sheet metal (4), the bottom sheet metal (5), the multiple vertical beams (6), and the multiple ventilation side plates (7) form the inner enclosure of the housing (2). The cooling device fastener (3) is connected between the top sheet metal (4) and the bottom sheet metal (5) of the box at the opening (200). When the first distributor (31) and the second distributor (31b) are also included: the cooling device fastener (3) can fix the first distributor (31), the second distributor (31b) and the first cooling pipe (21). The radiator fastener (8) is provided on the ventilation side plate (7) opposite to the opening (200). The radiator (42) is fixed on the ventilation side plate (7) by the radiator fastener (8).

12. A frequency converter characterized by: Includes the inverter cooling assembly as described in any one of claims 1-11.

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