Frequency converter cooling assembly and frequency converter

Abstract

The invention provides a frequency converter cooling assembly and a frequency converter, the frequency converter cooling assembly comprises a capacitor, a power module and a cooling device, the cooling device comprises a first cooling pipe and a second cooling pipe, the first cooling pipe surrounds the periphery of at least partial structure of the capacitor so as to cool the capacitor, and the second cooling pipe surrounds the periphery of at least partial structure of the capacitor; the fluid in the second cooling pipe can exchange heat with the power module to cool the power module, and the first cooling pipe and the second cooling pipe are communicated into a whole, so that the capacitor, the power module and the cooling device are integrated into an integrated structure. According to the invention, the capacitor and the power module can be cooled at the same time through one cooling device, the utilization rate of a refrigerant is improved, the cooling heat exchange area between the cooling device and the capacitor can be increased, the heat exchange efficiency of the capacitor is improved, the cooling efficiency of the capacitor is further greatly improved, and the service life of the capacitor is prolonged. And the cooling and heat dissipation efficiency of the frequency converter is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of frequency converters, and particularly relates to a frequency converter cooling assembly and a frequency converter. BACKGROUND

[0002] With the rapid development of electronic technology, the development of frequency converter technology is also getting faster and faster and is widely used. In the case of meeting the basic functions, the heat dissipation requirement of the frequency converter is also getting higher and higher, and the volume is getting smaller and smaller. The heat dissipation efficiency of the capacitor of the traditional frequency converter is low, and the capacitor and the power component use different cooling systems for cooling and heat dissipation, which leads to low utilization rate of the refrigerant and a relatively large structure.

[0003] Due to the technical problems such as low utilization rate of the refrigerant caused by the fact that the capacitor and the power component in the structure of the frequency converter in the prior art use different cooling systems for cooling and heat dissipation, the present application researches and designs a frequency converter cooling assembly and a frequency converter. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects such as low utilization rate of the refrigerant caused by the fact that the capacitor and the power component in the structure of the frequency converter in the prior art use different cooling systems for cooling and heat dissipation, so as to provide a frequency converter cooling assembly and a frequency converter.

[0005] In order to solve the above problems, the present application provides a frequency converter cooling assembly, which comprises:

[0006] a capacitor, a power module and a cooling device, the cooling device comprising a first cooling pipe and a second cooling pipe, the first cooling pipe surrounding the outer periphery of at least part of the structure of the capacitor to cool the capacitor, the fluid in the second cooling pipe being capable of exchanging heat with the power module to cool the power module, the first cooling pipe and the second cooling pipe being communicated and integrated, so that the capacitor, the power module and the cooling device are integrated into a structure.

[0007] In some embodiments,

[0008] a box body is further included, the box body having an internal accommodation space, the capacitor being arranged in the internal accommodation space, the box body having an opening on one side thereof, the first cooling pipe extending into the internal accommodation space from the opening and forming a curved structure surrounding the capacitor, and extending out of the opening to the outside of the box body.

[0009] In some embodiments,

[0010] The capacitor further comprises a third row of capacitors, the third row of capacitors is located on the side of the second row of capacitors away from the first row of capacitors, and the first cooling pipe extends on the side of the second row of capacitors away from the first row of capacitors and away from the opening, that is, between the second row of capacitors and the third row of capacitors, and is bent at the end of the third row of capacitors away from the opening, and further extends on the side of the third row of capacitors away from the second row of capacitors towards the opening to form an enclosing structure for the third row of capacitors and extend out of the box from the opening.

[0011] In some embodiments,

[0012] The capacitor further comprises a third row of capacitors, the third row of capacitors is located on the side of the second row of capacitors away from the first row of capacitors, and the first cooling pipe extends on the side of the second row of capacitors away from the first row of capacitors and away from the opening, that is, between the second row of capacitors and the third row of capacitors, and is bent at the end of the third row of capacitors away from the opening, and further extends on the side of the third row of capacitors away from the second row of capacitors towards the opening to form an enclosing structure for the third row of capacitors and extend out of the box from the opening.

[0013] In some embodiments,

[0014] The first cooling pipe has at least two, at least two first cooling pipes are arranged in parallel and at intervals, one end of the first cooling pipe is connected to a first shunt, the other end of the first cooling pipe is connected to a second shunt, the first shunt has a plurality of taps corresponding to the first cooling pipe one by one, so that one end of at least two first cooling pipes is connected through a plurality of taps inside the first shunt, and the second shunt also has a plurality of taps corresponding to the first cooling pipe one by one, so that the other end of at least two first cooling pipes is connected through a plurality of taps inside the second shunt.

[0015] In some embodiments,

[0016] The heat sink is further provided with an inlet end and an outlet end, one end of the second cooling pipe is connected to the inlet end of the heat sink, and the other end of the second cooling pipe is connected to the outlet end of the heat sink, so that the first cooling pipe and the second cooling pipe are connected in parallel.

[0017] In some embodiments,

[0018] The second cooling pipe connected to the inlet end of the heat sink is connected to the inlet end of the first cooling pipe, and a first throttling valve is further arranged between the inlet end of the first cooling pipe and the second cooling pipe; the second cooling pipe connected to the outlet end of the heat sink is connected to the outlet end of the first cooling pipe, and a second throttling valve is further arranged between the outlet end of the first cooling pipe and the second cooling pipe.

[0019] In some embodiments,

[0020] When the first shunt and the second shunt are included:

[0021] The first shunt is connected between the inlet end of the first cooling pipe and the second cooling pipe, and the first throttling valve is arranged at a position between the first shunt and the second cooling pipe; the second shunt is connected between the outlet end of the first cooling pipe and the second cooling pipe, and the second throttling valve is arranged at a position between the second shunt and the second cooling pipe.

[0022] In some embodiments,

[0023] The first shunt further includes a first total joint arranged at a total inlet end of the first shunt and connected to the first throttling valve, and the second shunt includes a second total joint arranged at a total outlet end of the second shunt and connected to the second throttling valve;

[0024] The other end of the second cooling pipe at the inlet end of the heat sink is connected with a first joint water nozzle for introducing fluid into the second cooling pipe through the first joint water nozzle; the other end of the second cooling pipe at the outlet end of the heat sink is connected with a second joint water nozzle for guiding the fluid in the second cooling pipe out through the second joint water nozzle.

[0025] In some embodiments,

[0026] The box body comprises a box body top plate, a box body bottom plate and ventilation side plates, the box body top plate is located above the box body bottom plate, ventilation side plates are arranged between the box body top plate and the box body bottom plate, the ventilation side plates are provided with ventilation openings, and the radiator is arranged on the ventilation side plates.

[0027] In some embodiments,

[0028] The box body has an opening on one side, further comprises a radiator fixing member, a cooling device fixing member and vertical beams, the box body top plate and the box body bottom plate are connected and supported by the vertical beams, ventilation side plates are arranged on the sides of the box body top plate and the box body bottom plate except the opening, the internal accommodating space of the box body is surrounded by the box body top plate, the box body bottom plate, the vertical beams and the ventilation side plates, the cooling device fixing member is connected between the box body top plate and the box body bottom plate at the opening, when further comprising a first shunt and a second shunt, the cooling device fixing member can fix the first shunt, the second shunt and the first cooling pipe, the radiator fixing member is arranged on the ventilation side plate opposite to the opening, and the radiator is fixed on the ventilation side plate by the radiator fixing member.

[0029] The application further provides a frequency converter comprising the aforementioned frequency converter cooling assembly.

[0030] The frequency converter cooling assembly and the frequency converter provided by the application have the following beneficial effects:

[0031] 1. The capacitor and the power module of the frequency converter are cooled by the first cooling pipe and the second cooling pipe respectively, and the first and second cooling pipes are connected as a whole, so that the capacitor, the power module and the cooling device are integrated, the capacitor and the power module can be cooled and radiated simultaneously by a set of cooling devices, the utilization rate of the refrigerant is improved, the first cooling pipe of the application surrounds the outer periphery of the capacitor in a surrounding structure, the cooling and heat exchange area between the capacitor and the first cooling pipe is increased, the heat exchange efficiency of the capacitor is improved, the cooling efficiency of the capacitor is further greatly improved, the cooling and radiating efficiency of the frequency converter is improved, and the problem of low utilization rate of the refrigerant caused by the different cooling systems for the capacitor and the power module in the structure of the frequency converter in the prior art is effectively solved.

[0032] 2. The application further provides the structure that the first cooling pipe and the second cooling pipe are arranged in parallel, and the first and second throttles are arranged at the positions where the first and second cooling pipes meet, so that the refrigerant flow can be conveniently and accurately regulated, the fluid flow entering the power module of the radiator and the fluid flow entering the capacitor of the first cooling pipe are regulated, the capacitor and the power module are cooled in a targeted manner, the required refrigerant flow can be provided according to the temperature (required heat dissipation) of the capacitor and the power module, the heat dissipation effect of the capacitor and the power module is improved, energy is saved, and the utilization rate of the refrigerant is further improved.

[0033] 3. The application further provides the venting side plate arranged between the top plate and the bottom plate of the box, so that the cavity in the box is further relatively closed and sealed, the cooling and heat dissipation effect of the capacitor in the internal space is further improved, the airflow can be introduced through the venting hole of the venting side plate, the cooling and heat dissipation effect of the capacitor is further improved, the airflow can be guided to the radiator through the venting hole of the venting side plate, so that the radiator is further cooled, the heat dissipation and cooling effect of the power module is further improved, and the cooling and heat dissipation performance of the capacitor and the power module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a perspective view of the frequency converter cooling assembly of the application (not including the second cooling pipe, the radiator and the power module);

[0035] Figure 2 is a three-view of Figure 1 ;

[0036] Figure 3 is a perspective view of the box + capacitor assembly of the application;

[0037] Figure 4 is a partial structure view of the cooling device of the application;

[0038] Figure 5 is an appearance structure view of the first and second flow dividers of the application;

[0039] Figure 6 is an internal sectional view of the first and second flow dividers of the application;

[0040] Figure 7 is a whole perspective view of the frequency converter cooling assembly of the application;

[0041] Figure 8 is an appearance structure view of the first and second throttles of the application;

[0042] Figure 9 is a three-view of Figure 8Fig. 2 is a cross-sectional view of the first and second throttle valves of Fig. 1.

[0043] Reference signs are indicated as:

[0044] 1. Capacitor; 11. First row of capacitors; 12. Second row of capacitors; 13. Third row of capacitors; 2. Cabinet; 3. Cooling device fixing member; 4. Cabinet top panel; 5. Cabinet bottom panel; 6. Vertical beam; 7. Ventilation side panel; 8. Radiator fixing member; 21. First cooling pipe; 23. First throttle valve; 23b. Second throttle valve; 31. First flow divider; 31b. Second flow divider; 32. Tap; 33. First total connector; 33b. Second total connector; 41. Power module; 42. Radiator; 43. Second cooling pipe; 44. First connector water nozzle; 44b. Second connector water nozzle; 100. Internal accommodation space; 200. Opening. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0046] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0047] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full equivalents thereof.

[0048] In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings generally for the purpose of describing and simplifying the present application, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0049] For the purpose of description, spatial relative terms, such as "above", "upper", "up", "below", "lower", etc., can be used herein for describing the spatial relationship between one device or feature and another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the device described as "above" or "above" the other device or structure will be positioned "below" or "below" the other device or structure. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein should be interpreted accordingly.

[0050] In addition, it should be noted that the use of the terms "first", "second", etc. to describe various components is merely intended to distinguish one component from another, and the above terms do not have special meanings unless otherwise stated, and therefore cannot be construed as limiting the scope of protection of the present application.

[0051] As Figures 1-9As shown, the present application provides a frequency converter cooling assembly, which comprises:

[0052] The capacitor 1, the power module 41 and the cooling device, the cooling device comprises a first cooling pipe 21 and a second cooling pipe 43, the first cooling pipe 21 surrounds the outer periphery of at least part 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 communicated and integrated, so that the capacitor 1, the power module 41 and the cooling device are integrated into an integrated structure.

[0053] The present application can cool the capacitor and the power module through the first cooling pipe and the second cooling pipe respectively, and the first and second cooling pipes are communicated and integrated, so that the capacitor, the power module and the cooling device are integrated, the capacitor and the power module can be cooled and radiated at the same time through a set of cooling devices, the utilization rate of the refrigerant is improved, the first cooling pipe of the present application surrounds the outer periphery of the capacitor through the surrounding structure, the cooling and heat exchange area between the capacitor and the first cooling pipe is increased, the heat exchange efficiency of the capacitor is improved, the cooling efficiency of the capacitor is further greatly improved, and the cooling and heat radiation efficiency of the frequency converter is improved.

[0054] At present, the cooling method in the field of frequency converters generally adopts water cooling and air cooling, and the tee pipe (second cooling pipe), throttle valve and other structures are not common means in the frequency converter capacitor cooling scheme. Most of the capacitor elements are mainly air-cooled, and the water-cooled mode is also cooled by installing the capacitor on the water-cooled plate. This cooling method only conducts heat through the contact surface of the capacitor and the water-cooled plate, and the cooling effect is poor. The present application uses a water-cooled pipe to surround the capacitor, and the cooling effect is greatly improved compared with the prior art.

[0055] The present application cools the capacitor assembly through the surrounding refrigerant pipe (or a semi-surrounding or partially surrounding structure), improves the heat exchange efficiency of the internal elements of the frequency converter, reduces the internal temperature of the system, and enhances the stability of the liquid cooling heat dissipation system; the refrigerant pipe is fully utilized, one water is used for two purposes, the tee pipe (second cooling pipe 43) is used to connect the power module radiator and the capacitor heat dissipation assembly, and the utilization rate of the refrigerant is improved.

[0056] In some embodiments,

[0057] Further, the box 2 has an opening 200 on one side thereof, and the first cooling pipe 21 extends into the internal accommodating space 100 from the opening 200 and forms a bending structure surrounding the capacitor 1, and extends out of the opening 200 to the outside of the box 2.

[0058] This is a preferred structure of the box of the present application, and a further preferred arrangement between the capacitor and the first cooling pipe and the box. By arranging the box as a structure including an internal accommodating space, and arranging the capacitor in the internal accommodating space, and using the first cooling pipe to extend into the internal accommodating space and form a bending structure surrounding the capacitor, the capacitor can form a relatively closed surrounding cooling and heat dissipation structure, further improving the cooling performance of the capacitor and improving the heat dissipation efficiency.

[0059] In some embodiments,

[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 away from the side of the second row of capacitors 12 along the first row of capacitors 11 and towards the direction away from the opening 200, and forms a bend at the end of the first row of capacitors 11 away from the opening 200, and then extends towards the opening 200 between the first row of capacitors 11 and the second row of capacitors 12, forming a surrounding structure for the first row of capacitors 11. Further, the end of the second row of capacitors 12 towards the opening 200 is bent again, and the side of the second row of capacitors 12 away from the first row of capacitors 11 extends away from the opening 200, to form a surrounding structure for the second row of capacitors 12.

[0061] This is a further preferred structure of the capacitor of the present application. By arranging two rows of capacitors, and arranging the first cooling pipe to form a half-surrounding structure (bending form) for the first row of capacitors and a half-surrounding structure (bending form) for the second row of capacitors in the internal accommodating space, the first cooling pipe can form a bending and serpentine structure, to increase the convective cooling heat exchange area with the first row of capacitors and the convective cooling heat exchange area with the second row of capacitors, respectively, further improving the cooling performance of the two rows of capacitors and improving the heat dissipation efficiency.

[0062] In some embodiments,

[0063] The capacitor 1 further comprises a third row of capacitors 13 located on the side of the second row of capacitors 12 away from the first row of capacitors 11, and 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 towards the direction away from the opening 200, i.e. 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, and further extends on the side of the third row of capacitors 13 away from the second row of capacitors 12 towards the direction of the opening 200 to form a surrounding structure for the third row of capacitors 13 and extends out of the box 2 from the opening 200.

[0064] This is a further preferred structure of the capacitor of the present application, and further by arranging the third row of capacitors on the side of the second row of capacitors away from the first row of capacitors, so that the second row of capacitors is located between the first and third rows of capacitors, and the first cooling pipe forms a semi-surrounding structure (bend form) for the third row of capacitors in the internal containing space, which can further increase the convective cooling heat exchange area of 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 embodiments,

[0066] The first cooling pipe 21 has at least two, and 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 flow divider 31, and the other end of the first cooling pipe 21 is connected to the second flow divider 31b, the first flow divider 31 has a plurality of taps 32 corresponding to the first cooling pipe 21, so that one end of the at least two first cooling pipes 21 is connected inside the first flow divider 31 through the plurality of taps 32, and the second flow divider 31b also has a plurality of taps 32 corresponding to the first cooling pipe 21, so that the other end of the at least two first cooling pipes 21 is connected inside the second flow divider 31b through the plurality of taps 32.

[0067] The present application further increases the convective cooling heat exchange area of the capacitor by arranging at least two spaced apart first cooling pipes, improves the cooling and heat dissipation performance, and introduces fluid into the plurality of first cooling pipes through the first flow divider, and collects the fluid in the plurality of first cooling pipes into the second flow divider and integrally leads out.

[0068] In some embodiments,

[0069] The heat sink 42 is further provided with the second cooling pipe 43, one end of the second cooling pipe 43 is communicated with the inside of the heat sink 42, and the power module 41 is arranged on the heat sink 42, so that the fluid in the second cooling pipe 43 can flow through the inside of the heat sink 42 to cool and dissipate the heat of the power module 41; the inlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, the outlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, one end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the inlet end of the heat sink 42, and the other end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the outlet end of the heat sink 42; so that the first cooling pipe 21 and the second cooling pipe 43 are in parallel.

[0070] The heat sink 42 is further provided with the second cooling pipe 43, one end of the second cooling pipe 43 is communicated with the inside of the heat sink 42, and the power module 41 is arranged on the heat sink 42, so that the fluid in the second cooling pipe 43 can flow through the inside of the heat sink 42 to cool and dissipate the heat of the power module 41; the inlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, the outlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, one end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the inlet end of the heat sink 42, and the other end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the outlet end of the heat sink 42; so that the first cooling pipe 21 and the second cooling pipe 43 are in parallel.

[0071] In some embodiments,

[0072] The second cooling pipe 43 communicated with the inlet end of the heat sink 42 is communicated with the inlet end of the first cooling pipe 21, and a first throttling valve 23 is further arranged between the inlet end of the first cooling pipe 21 and the second cooling pipe 43; the second cooling pipe 43 communicated with the outlet end of the heat sink 42 is communicated with the outlet end of the first cooling pipe 21, and a second throttling valve 23b is further arranged between the outlet end of the first cooling pipe 21 and the second cooling pipe 43.

[0073] The heat sink 42 is further provided with the second cooling pipe 43, one end of the second cooling pipe 43 is communicated with the inside of the heat sink 42, and the power module 41 is arranged on the heat sink 42, so that the fluid in the second cooling pipe 43 can flow through the inside of the heat sink 42 to cool and dissipate the heat of the power module 41; the inlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, the outlet end of the heat sink 42 is communicated with at least one second cooling pipe 43, one end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the inlet end of the heat sink 42, and the other end of the first cooling pipe 21 is communicated with the second cooling pipe 43 of the outlet end of the heat sink 42; so that the first cooling pipe 21 and the second cooling pipe 43 are in parallel.

[0074] The application realizes liquid cooling heat dissipation of a capacitor assembly, improves heat exchange efficiency of components, uses a three-way pipe to connect a power module radiator and a capacitor cooling assembly, improves utilization of refrigerant, and increases a throttle valve at a capacitor cooling assembly joint to facilitate refrigerant flow adjustment according to actual component heat loss and enhance overall heat dissipation effect.

[0075] Referring to Figure 4 and Figure 5 , the cooling device comprises a first cooling pipe 21 (copper pipe), a flow divider and a throttle valve; the flow divider comprises a branch joint (small) and a main joint (large). The flow divider is composed of two aluminum plates, each of which is provided with a half flow channel in the middle. After splicing, the splicing part is ensured to be leakproof through a sealing process. The two sides of the flow divider are each provided with a plurality of fixing holes of different sizes, which are connected with the internal flow channel. The small fixing holes on the side are provided with the branch joint (small), which is the water outlet. The large fixing holes on the bottom are provided with the main joint (large), which is the water inlet. The water inlet and the water outlet are connected and divided by the flow divider. The first cooling pipe 21 is connected with the branch joint (small) on the different communicating vessels at both ends. The first cooling pipe 21 is matched with the capacitor 1, so that the capacitor 1 is located at the gap formed by the first cooling pipe 21, so that the first cooling pipe 21 can fully absorb the heat generated by the capacitor 1, thereby achieving the heat dissipation effect. The throttle valve is installed at the water inlet of the flow divider. By rotating the throttle valve switch, the refrigerant flow can be controlled. For convenience of explanation, the throttle facility used here is a physical method. To ensure the throttling effect, the throttle valve can be replaced with an electronic throttle valve, which is automatically controlled by an electric signal. The working principles of the communicating vessel and the throttle valve can be intuitively displayed from Figure 6 the communicating vessel sectional view and Figure 9 the throttle valve sectional view.

[0076] In some embodiments,

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

[0078] The first flow divider 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 arranged at a position between the first flow divider 31 and the second cooling pipe 43. The second flow divider 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 arranged at a position between the second flow divider 31b and the second cooling pipe 43.

[0079] It is a further preferred structure and position of the first and second throttle valves of the application, that is, the first throttle valve is arranged at a position between the first flow divider and the second cooling pipe, through which the first throttle valve can adjust the size of the fluid flow into the second cooling pipe and the first flow divider respectively, and the flow is adjusted according to the different temperatures, so that the power module and the capacitor can be cooled and cooled effectively, and the cooling effect is improved; the second throttle valve is arranged at a position between the second flow divider and the second cooling pipe, and the second throttle valve can adjust the size of the fluid flow from the first flow divider to the second cooling pipe, and the flow is adjusted according to the different temperatures, so that the power module and the capacitor can be cooled and cooled effectively, and the cooling effect is improved.

[0080] The application uses valve control cooling water to divide the water cooling plate radiator and the capacitor cooling structure (multi-layer cooling copper pipe (first cooling pipe 21)) respectively, realizes the cooling control of two modules, and realizes effective cooling and heat dissipation.

[0081] In some embodiments,

[0082] The first flow divider 31 further comprises a first total joint 33 arranged at a total inlet end of the first flow divider 31 and connected with the first throttle valve 23, and the second flow divider 31b comprises a second total joint 33b arranged at a total outlet end of the second flow divider 31b and connected with the second throttle valve 23b;

[0083] The other end of the second cooling pipe 43 at the inlet end of the radiator 42 is connected with a first joint water nozzle 44, so as to introduce fluid into the second cooling pipe 43 through the first joint water nozzle 44; and the other end of the second cooling pipe 43 at the outlet end of the radiator 42 is connected with a second joint water nozzle 44b, so as to guide the fluid in the second cooling pipe 43 out through the second joint water nozzle 44b.

[0084] The application further comprises a first total joint and a second total joint, which can realize the connection between the first flow divider and the first throttle valve, and realize the connection between the second flow divider and the second throttle valve, respectively; the other end of the second cooling pipe at the inlet end of the radiator is connected with a first joint water nozzle, which can be used for introducing water into the second cooling pipe; and the other end of the second cooling pipe at the outlet end of the radiator is connected with a second joint water nozzle, which can be used for guiding water out of the second cooling pipe.

[0085] Referring to Figure 7The working mode of the capacitor cooling structure is shown as follows: external refrigerant enters the whole system from the first joint water nozzle 44, is branched by the second cooling pipe 43 (preferably a three-way pipe), part of the refrigerant enters the first cooling pipe 21 through the flow divider, and the heat generated by the capacitor 1 during operation is absorbed by the refrigerant in the first cooling pipe 21; the other part of the refrigerant enters the radiator 42, the power module 41 is mounted on the radiator 42, and the heat generated by the power module 41 during operation is absorbed by the refrigerant inside the radiator 42. After the two parts of refrigerant work in the corresponding system, they are collected together through the second cooling pipe 43, pass through another second joint water nozzle 44b, and realize the circulation of the refrigerant in the system. The throttle valve is installed at the lower end of the flow divider, when the capacitor 1 generates less heat, the valve can be adjusted to narrow the flow passage, thereby reducing the flow or even interrupting the supply of refrigerant in the system; when the capacitor 1 generates more heat, the flow of refrigerant can be increased by adjusting the flow passage, thereby improving the heat dissipation effect of the capacitor 1.

[0086] In some embodiments,

[0087] The box body 2 comprises a box body top plate 4, a box body bottom plate 5 and a ventilation side plate 7, the box body top plate 4 is located above the box body bottom plate 5, and the ventilation side plate 7 is further arranged between the box body top plate 4 and the box body bottom plate 5, the ventilation side plate 7 is provided with a ventilation opening, and the radiator 42 is arranged on the ventilation side plate 7.

[0088] The application further sets the ventilation side plate between the top plate and the bottom plate of the box body, so that the internal cavity of the box body forms a further relatively closed and sealed space structure, which can further improve the cooling and heat dissipation effect of the capacitor in the internal space, and the ventilation opening on the ventilation side plate can introduce air flow, further improving the cooling and heat dissipation effect of the capacitor, and the ventilation hole on the ventilation side plate can also guide the air flow to flow through the radiator, thereby further cooling the radiator, and further improving the heat dissipation and cooling effect of the power module, and improving the cooling and heat dissipation performance of the capacitor and the power module.

[0089] In some embodiments,

[0090] The box 2 has an opening 200 on one side thereof, and further comprises a radiator fixing member 8, a cooling device fixing member 3, and vertical beams 6 connecting and supporting the box top panel 4 and the box bottom panel 5, the box top panel 4 and the box bottom panel 5 are connected by the vertical beams 6 except for the side edges other than the opening 200, the ventilation side plates 7 are arranged on the side edges of the box top panel 4 and the box bottom panel 5 other than the opening 200, the internal accommodating space 100 of the box 2 is surrounded by the box top panel 4, the box bottom panel 5, the vertical beams 6, and the ventilation side plates 7, the cooling device fixing member 3 is connected between the box top panel 4 and the box bottom panel 5 at the opening 200, when further comprising a first flow divider 31a and a second flow divider 31b, the cooling device fixing member 3 can fix the first flow divider 31a, the second flow divider 31b, and the first cooling pipe 21, the radiator fixing member 8 is arranged on the ventilation side plate 7 opposite to the opening 200, and the radiator 42 is fixed on the ventilation side plate 7 by the radiator fixing member 8.

[0091] This is a further preferred structure of the box of the application, the radiator can be fixed by the radiator fixing member, the top panel and the bottom panel can be connected and supported by the vertical beams, the cooling device fixing member can be used to fix the first and second flow dividers and the first cooling pipe, etc., to form a complete set of box assembly, i.e., the inverter cooling and heat dissipation assembly, to realize the structure of integrating the capacitor and the power module and cooling them by a set of cooling devices, to improve the compactness of the structure and further improve the utilization rate of the refrigerant.

[0092] Referring to Figure 1 From the 3D view, the capacitor cooling structure is divided into four parts, which are Figure 3 the capacitor + box assembly, Figure 4 the cooling device, Figures 5-6 the flow divider (communicator), and Figure 8 the throttle valve.

[0093] Referring to 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] The present invention also provides a frequency converter that includes the aforementioned frequency converter cooling assembly.

[0095] This invention uses 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 makes full use of the refrigerant pipe, allowing for dual-use of water, and uses a T-junction to connect the power module heat sink and the capacitor cooling assembly, 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 invention 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 the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. 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 the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A frequency inverter cooling assembly, characterized by: The capacitor (1), the power module (41) and the cooling device, the cooling device comprising a first cooling pipe (21) and a second cooling pipe (43), the first cooling pipe (21) surrounding the outer periphery of at least part of the structure of the capacitor (1) to cool the capacitor (1), the fluid in the second cooling pipe (43) being capable of exchanging heat with the power module (41) to cool the power module (41), the first cooling pipe (21) and the second cooling pipe (43) being in communication and integrated as one, so that the capacitor (1), the power module (41) and the cooling device are integrated as one structure.

2. The frequency converter cooling assembly according to claim 1, further comprising a cabinet (2) having an internal accommodating space (100) in which the capacitor (1) is arranged, the cabinet (2) having an opening (200) on one side thereof, the first cooling pipe (21) extending into the internal accommodating space (100) from the opening (200) and forming a curved structure surrounding the capacitor (1) and extending out of the opening (200) to the outside of the cabinet (2).

3. The frequency converter cooling assembly according to claim 2, wherein the capacitor (1) comprises a first row of capacitors (11) and a second row of capacitors (12), the first cooling pipe (21) extending into the internal accommodating space (100) from the opening (200) and extending along the first row of capacitors (11) away from the second row of capacitors (12) on one side thereof and away from the opening (200), and being bent at the end of the first row of capacitors (11) away from the opening (200) and extending between the first row of capacitors (11) and the second row of capacitors (12) towards the opening (200) to form a surrounding structure for the first row of capacitors (11), and further being bent at the end of the second row of capacitors (12) towards the opening (200) and extending 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 frequency converter cooling assembly according to claim 3, wherein ​ ​ ​ The capacitor (1) further comprises a third row of capacitors (13) 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 towards the direction away from the opening (200), that is, 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), further, the first cooling pipe (21) extends on the side of the third row of capacitors (13) away from the second row of capacitors (12) towards the direction of the opening (200) to form an enclosing structure for the third row of capacitors (13) and extends out of the box (2) from the opening (200).

5. The frequency converter cooling assembly according to claim 1, wherein: The first cooling pipe (21) has at least two, at least two first cooling pipes (21) are arranged in parallel and at intervals, one end of the first cooling pipe (21) is connected to a first flow divider (31), the other end of the first cooling pipe (21) is connected to a second flow divider (31b), the first flow divider (31) has a plurality of taps (32) corresponding to the first cooling pipe (21), so that the at least two first cooling pipes (21) are connected through the plurality of taps (32) inside the first flow divider (31), the second flow divider (31b) also has a plurality of taps (32) corresponding to the first cooling pipe (21), so that the other end of the at least two first cooling pipes (21) is connected through the plurality of taps (32) inside the second flow divider (31b).

6. The frequency converter cooling assembly according to claim 1, wherein: Further comprising a heat sink (42), one end of the second cooling pipe (43) is connected to the inside of the heat sink (42), the power module (41) is arranged on the heat sink (42) so that the fluid in the second cooling pipe (43) can flow inside the heat sink (42) to cool and dissipate heat of the power module (41); and the inlet end of the heat sink (42) is connected to at least one second cooling pipe (43), the outlet end of the heat sink (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 heat sink (42), the other end of the first cooling pipe (21) is connected to the second cooling pipe (43) at the outlet end of the heat sink (42); so that the first cooling pipe (21) and the second cooling pipe (43) are connected in parallel.

7. The frequency converter cooling assembly according to claim 6, wherein: The second cooling pipe (43) in communication with the inlet end of the radiator (42) is in communication with the inlet end of the first cooling pipe (21), and a first throttle valve (23) is further arranged between the inlet end of the first cooling pipe (21) and the second cooling pipe (43); the second cooling pipe (43) in communication with the outlet end of the radiator (42) is in communication with the outlet end of the first cooling pipe (21), and a second throttle valve (23b) is further arranged 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 shunt (31) and the second shunt (31b) are included: The first shunt (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 arranged at a position between the first shunt (31) and the second cooling pipe (43); the second shunt (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 arranged at a position between the second shunt (31b) and the second cooling pipe (43).

9. The inverter cooling assembly according to claim 8, characterized in that: The first shunt (31) further includes a first total joint (33) arranged at a total inlet end of the first shunt (31) and connected with the first throttle valve (23), and the second shunt (31b) includes a second total joint (33b) arranged at a total outlet end of the second shunt (31b) and connected with the second throttle valve (23b); The other end of the second cooling pipe (43) at the inlet end of the radiator (42) is connected with a first joint water nozzle (44) for introducing fluid into the second cooling pipe (43) through the first joint water nozzle (44); the other end of the second cooling pipe (43) at the outlet end of the radiator (42) is connected with a second joint water nozzle (44b) for leading the fluid in the second cooling pipe (43) out through the second joint water nozzle (44b).

10. The inverter cooling assembly according to claim 6, characterized in that: Further including a box body (2) including a box body top panel (4), a box body bottom panel (5) and a ventilation side plate (7), the box body top panel (4) is above the box body bottom panel (5), and the box body top panel (4) and the box body bottom panel (5) are further provided with the ventilation side plate (7) having ventilation openings, and the radiator (42) is arranged on the ventilation side plate (7).

11. The inverter cooling assembly according to claim 10, characterized in that: The box (2) has an opening (200) on one side thereof, and further comprises a radiator fixing member (8), a cooling device fixing member (3), and vertical beams (6) connecting and supporting the box top panel (4) and the box bottom panel (5), the box top panel (4) and the box bottom panel (5) are provided with ventilation side panels (7) on the sides other than the opening (200), the box top panel (4), the box bottom panel (5), the vertical beams (6), and the ventilation side panels (7) form an internal accommodating space (100) of the box (2), the cooling device fixing member (3) is connected between the box top panel (4) and the box bottom panel (5) at the opening (200), when further comprising a first shunt (31a) and a second shunt (31b), the cooling device fixing member (3) is capable of fixing the first shunt (31a), the second shunt (31b), and the first cooling pipe (21), the radiator fixing member (8) is arranged on the ventilation side panel (7) opposite to the opening (200), and the radiator (42) is fixed on the ventilation side panel (7) through the radiator fixing member (8).

12. A frequency converter characterized by: A frequency converter cooling assembly according to any one of claims 1-11. A frequency converter cooling assembly according to any one of claims 1-11.

Images