Frequency converter cabinet, air conditioning system

Abstract

The application provides a frequency converter cabinet and an air conditioning system, wherein the frequency converter cabinet comprises a cabinet body, the bottom of the internal space of the cabinet body is provided with a support frame, the top of the support frame is provided with a first mounting surface for mounting electrical modules, and a heat dissipation module is arranged in the support frame; the heat dissipation module comprises an air duct shell, the air duct shell is provided with an air outlet and an air inlet, and the airflow in the air duct shell can flow out of the air outlet, exchange heat with the electrical modules and then flow back into the air duct shell from the air inlet. According to the application, the support frame serves as a mounting carrier for the electrical modules in the cabinet body, thereby ensuring that the positions of the electrical modules are reliable and stable; on the other hand, the support frame covers the outside of the heat dissipation module, so that the air duct shell can avoid bearing the load of the upper components, the air duct shell can meet the sealing requirement of the air duct itself without considering the structural strength of the air duct shell based on the support purpose, the weight of the frequency converter cabinet is effectively reduced, and the manufacturing cost of the frequency converter cabinet is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioning, and particularly relates to a frequency converter cabinet and an air conditioning system. BACKGROUND

[0002] Under the situation of continuous progress and development of power electronics technology, the application places of air conditioners are also increasing. In some places where air conditioning units are placed densely, it is required that the electric control cabinet is small in size, the refrigerant pipeline is convenient to design and install, and the heat dissipation air duct is reasonably designed. For the small-size electric control cabinet, the installation of the heat exchange device will greatly affect the overall size and length-width ratio of the electric control cabinet. If the position of the heat exchange device cannot be reasonably arranged, the problems of difficult assembly of the whole device of the electric control cabinet, uncoordinated length-width ratio, and strong electric components disturbed by condensate water generated by the heat exchange device will be caused. Based on the foregoing problems, in the related art, the heat dissipation module in the frequency converter cabinet is arranged at the bottom region of the cabinet, and the electrical components are arranged in the region above the heat dissipation module. In this way, on the one hand, the width of the frequency converter cabinet can be designed to be smaller, and on the other hand, the condensate water generated by the heat dissipation module will not adversely affect the electrical components in the region above the heat dissipation module since the condensate water is located at the bottom region of the cabinet. Meanwhile, the heat dissipation module also serves as a mounting carrier for some electrical components in the region above the heat dissipation module, thereby ensuring the mounting reliability of the electrical components and facilitating the reasonable layout of the space in the cabinet. However, the inventors have found that the air duct shell of the heat dissipation module not only forms an air flow channel but also bears the weight of some electrical components above the heat dissipation module. Therefore, in actual application, the structural strength of the air duct shell needs to be considered to ensure that the air duct shell has sufficient bearing capacity. As a result, the shell thickness of the air duct shell is designed to be larger, and the strength grade of the shell material is selected to be higher, which increases the overall weight of the frequency converter cabinet, reduces the convenience of moving the frequency converter cabinet, and increases the manufacturing cost of the frequency converter cabinet. SUMMARY

[0003] Therefore, the application provides a frequency converter cabinet and an air conditioning system, which can overcome the problems of large weight and high manufacturing cost of the frequency converter cabinet in the related art.

[0004] In order to solve the above problems, the application provides a frequency converter cabinet, which comprises a cabinet. The bottom of the internal space of the cabinet has a support frame. The top of the support frame has a first mounting surface on which electrical modules are mounted. The support frame is internally provided with a heat dissipation module. The heat dissipation module comprises an air duct shell. The air duct shell has an air outlet and an air inlet. Air flow in the air duct shell can flow out of the air outlet, exchange heat with the electrical modules, and then flow back into the air duct shell from the air inlet.

[0005] In some embodiments, the electrical module comprises a main control component assembled on the first mounting surface and corresponding to the air outlet; and / or the support frame is a cubic frame structure, and each of the six walls of the cubic frame structure has a plurality of lightening holes.

[0006] In some embodiments, the first mounting surface is connected with a reinforcing rib.

[0007] In some embodiments, the air duct shell further has a fan operation window, and a fan assembly is pullably assembled in the air duct shell through the fan operation window.

[0008] In some embodiments, the fan operation window corresponds to one of the plurality of lightening holes.

[0009] In some embodiments, the cabinet comprises a bottom plate connected to the bottom wall of the support frame, the air duct shell comprises a horizontal plate body and first and second vertical standing plates extending downward at adjacent two sides of the horizontal plate body, the bottom ends of the first and second vertical standing plates are detachably connected to the inner surface of the bottom plate, the air outlet and the air inlet are configured on the horizontal plate body, and the fan operation window is configured on one of the first and second vertical standing plates.

[0010] In some embodiments, the cabinet further comprises a standing plate in a U-shaped projection in plan view, the bottom end of the standing plate is connected to the outer side of the standing wall of the bottom plate to jointly form an air flow channel with the bottom plate and the air duct shell; and / or the bottom plate is provided with a water outlet.

[0011] In some embodiments, the standing plate away from the first and second vertical standing plates is configured with a heat exchanger operation window, and a heat exchanger assembly is pullably assembled in the air duct shell through the heat exchanger operation window; and / or the inner surface of the bottom plate is connected with first and second connecting plates, the first and second connecting plates are perpendicularly connected to form a right angle connecting portion, and the bottom ends of the first and second vertical standing plates are connected to the right angle connecting portion, respectively.

[0012] In some embodiments, the heat exchanger assembly comprises a mounting fixed plate and an evaporator connected to the first side surface thereof, the mounting fixed plate is detachably connected to the heat exchanger operation window to block the heat exchanger operation window, and the evaporator is detachably connected to the air inlet.

[0013] The application also provides an air conditioning system comprising the above frequency converter cabinet.

[0014] The application provides a frequency converter cabinet and an air conditioning system. The support frame serves as a mounting carrier of the electrical modules in the cabinet to ensure the reliable and stable position of the electrical modules. The support frame is covered on the outside of the heat dissipation module, so that the air duct shell avoids bearing the load of the upper components. The air duct shell can meet the sealing requirement of the air duct without considering the structural strength of the air duct shell based on the support purpose, thereby effectively reducing the weight of the frequency converter cabinet and lowering the manufacturing cost of the frequency converter cabinet. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a perspective view of the frequency converter cabinet according to the application (only relevant components are shown);

[0016] Figure 2 FIG. 2 is a perspective view of the support frame in the frequency converter cabinet (oblique view from top to bottom); Figure 1

[0017] Figure 3 FIG. 4 is a schematic view of the relative position relationship between the air duct shell and the mounting fixed plate in the frequency converter cabinet; Figure 1

[0018] Figure 4 FIG. 5 is a perspective view of the support sheet metal part of the fan assembly in the frequency converter cabinet. Figure 1 The reference signs are as follows:

[0019] 1, heat dissipation module; 11, air duct shell; 111, air inlet; 112, fan operation window; 113, air outlet; 12, mounting fixed plate; 13, heat exchanger connecting plate; 2, fan assembly; 21, planar mounting plate; 22, vertical fixed plate; 3, support frame; 32, bottom plate; 33, reinforcing rib; 35, first connecting plate; 36, second connecting plate; 37, water outlet; 4, cabinet; 5, heat exchanger assembly.

[0020] DETAILED DESCRIPTION

[0021] For reference Figures 1 to 4 ​​​As shown, according to the embodiment of the present application, a frequency converter cabinet is provided, comprising a box body 4, the bottom of the internal space of the box body 4 is provided with a support frame 3, the top of the support frame 3 is provided with a first mounting surface for mounting electrical modules, and a heat dissipation module 1 is arranged in the support frame 3, the heat dissipation module 1 comprises an air duct shell 11, the air duct shell 11 is provided with an air outlet 113 and an air inlet 111, and the airflow in the air duct shell 11 can flow out from the air outlet 113, exchange heat with the electrical modules, and then flow back into the air duct shell 11 from the air inlet 111. In the technical solution, the support frame 3 serves as a mounting carrier for the electrical modules in the box body 4 to ensure that the position of the electrical modules is reliable and stable, and the support frame 3 is also arranged on the outer side of the heat dissipation module 1, so that the air duct shell 11 is prevented from bearing the load of the upper components, the air duct shell 11 can meet the sealing requirement of the air duct itself without considering the structural strength of the air duct shell 11 based on the support purpose, the weight of the frequency converter cabinet is effectively reduced, and the manufacturing cost of the frequency converter cabinet is reduced. It should be noted that the support frame 3 is a non-sealed polyhedral structure, which can be formed by welding a plurality of long strip-shaped steel or steel plates into a whole, or can be formed by bending and welding a sheet metal with weight reduction holes. Specifically, the support frame 3 is a cubic frame structure, and the six walls of the cubic frame structure are provided with a plurality of weight reduction holes to reduce the overall weight while improving the support capacity. Preferably, the sheet metal is bent and welded to form a support frame with a certain thickness (which can be reasonably selected according to the load it bears), which has good integrity and is convenient to process.

[0022] Specifically, the first mounting surface is the top surface of the cubic frame structure, and the weight reduction holes are also formed on the first mounting surface, and the size of the weight reduction holes should be designed as large as possible to reduce the amount of material used and reduce the manufacturing cost while ensuring the support strength. The weight reduction holes on the first mounting surface preferably cover the air inlet 111 and the air outlet 113.

[0023] In order to ensure the structural stability of the support frame 3, a reinforcing rib 33 is also connected to the first mounting surface, which can be a sheet metal piece with a U-shaped cross section at one end, and the two ends can be welded to the hole position of the weight reduction hole on the first mounting surface. The reinforcing rib 33 can be provided in multiple sections, which can be reasonably arranged according to the needs.

[0024] In some embodiments, the electrical module includes control devices (for example, including circuit breakers, relays, contactors), main control components, wiring components, etc., wherein the control devices, wiring components, etc. electrical components with small mass can be suspended and assembled inside the corresponding plate body of the box 4, and the main control components, due to the integration of the main control assembly frame and the main controller, motor board, capacitor, busbar, power module and other electrical components assembled on the main control assembly frame, the mass is often larger, and the suspended assembly method has the risk of insufficient reliability, as a preferred way, the main control component is assembled on the first mounting surface, and the first mounting surface forms effective support for the main control component, ensuring the reliable stability of its position, and the assembly position of the main control component corresponds to the air outlet 113, for example, the main control component is assembled at a position opposite to the air outlet 113, to ensure that the cold air flow from the air outlet 113 can form efficient cooling and heat dissipation for the main control component; of course, in some cases, the main control component does not necessarily strictly face the air outlet 113, and the two can be staggered by a relatively small position, so that the cold air flow can meet the cooling demand of the main control component.

[0025] In some embodiments, the air duct shell 11 also has a fan operation window 112, and the fan assembly 2 is pullably assembled in the air duct shell 11 through the fan operation window 112, that is, the fan assembly 2 is assembled in the air duct shell 11 in a drawer-like pullable structure, which can be very convenient to assemble in the air duct shell 11. As a preferred embodiment, the fan operation window 112 corresponds to the position of one of the plurality of weight reduction holes, so that when the air duct shell 11 and the fan assembly 2 are assembled inside the support frame 3, the fan assembly 2 can be pulled out and disassembled through the corresponding weight reduction hole. The fan assembly 2 includes a fan mounting member and a blade and a driving motor mounted thereon, wherein the fan mounting member includes a planar mounting plate, the central region of the planar mounting plate is provided with a ventilation hole, the driving motor is fixed on the planar mounting plate, the driving motor drives the blade to rotate, and the blade is arranged corresponding to the ventilation hole, and each of the opposite sides of the planar mounting plate is provided with a vertical fixed plate, and the vertical fixed plate close to the fan operation window 112 is fixedly connected with the air duct shell 11 through bolts, and realizes the sealing of the fan operation window 112.

[0026] The box body 4 comprises a vertical plate, a top plate connected to the top end of the vertical plate, and a bottom plate 32 connected to the bottom end of the vertical plate and connected to the bottom wall of the support frame 3. The air duct shell 11 comprises a horizontal plate body, a first vertical plate and a second vertical plate extending downward at two adjacent sides of the horizontal plate body, and the bottom ends of the first vertical plate and the second vertical plate are detachably connected to the inner surface of the bottom plate 32. The air outlet 113 and the air inlet 111 are arranged on the horizontal plate body, and the fan operation window 112 is arranged on one of the first vertical plate and the second vertical plate. That is, in the specific use state, the air duct shell 11 in this technical solution only has two vertical plates, and the other two vertical surfaces and the bottom surface are not covered by plate members and are open. In this way, the material of the air duct shell 11 is further reduced, and at the same time, the open surfaces can also be beneficial to the disassembly of the heat exchanger assembly 5 in the air duct shell 11. Specifically, the inner surface of the bottom plate 32 is connected with a first connecting plate 35 and a second connecting plate 36, and the first connecting plate 35 and the second connecting plate 36 are connected at a right angle to form a right angle connecting portion, and the bottom ends of the first vertical plate and the second vertical plate are connected to the right angle connecting portion, respectively.

[0027] The box body 4 further comprises a vertical plate which is projected in a U shape in plan view, and the Y-shaped vertical plate is formed by bending an integral sheet metal without the need for connection and welding, so that the protection level is high. The bottom end of the vertical plate is connected (for example, welded) to the outer side surface of the vertical wall of the bottom plate 32, so as to be capable of being jointly surrounded with the bottom plate 32 and the air duct shell 11 to form an air flow channel. The formation of the air flow channel is simple and has low cost, and it can be understood that the connected position should be sealed as necessary to ensure the sealing of the air flow channel (except for the air outlet 113 and the air inlet 111). The bottom plate 32 is provided with a water outlet 37, which can timely discharge the condensate generated during the operation of the heat exchanger assembly 5. The water outlet 37 can be detachably connected with a corresponding drain pipe.

[0028] In some embodiments, heat exchanger operation windows are formed on the vertical plates away from the first vertical plate and the second vertical plate, and the heat exchanger assembly 5 is pullably assembled in the air duct housing 11 via the heat exchanger operation windows, that is, the heat exchanger operation windows are formed on the vertical plates corresponding to the open vertical faces of the air duct housing 11, and the pullable assembly of the heat exchanger assembly 5 can be achieved simply and conveniently. Specifically, the heat exchanger assembly 5 includes a mounting fixed plate 12 and an evaporator (not shown in the figure) connected to the first side face thereof, the mounting fixed plate 12 is detachably connected to the heat exchanger operation windows to block the heat exchanger operation windows, and the evaporator is detachably connected to the air inlet 111 (for example, through a heat exchanger connecting plate 13), that is, the heat exchanger assembly 5 is reliably fixed through the connection between the mounting fixed plate 12 and the vertical plate and the connection between the evaporator itself and the air duct housing 11, preventing the occurrence of unreliable connection due to the excessive weight of the evaporator. The evaporator is preferably a heat exchanger with refrigerant as the refrigeration medium, which forms controllable communication with the refrigerant circulation of the air conditioning system through the refrigerant inlet and the refrigerant outlet provided on the mounting fixed plate 12, ensuring the heat dissipation effect, and in some cases, the refrigeration medium of the evaporator can also be water, oil, etc.

[0029] According to the embodiments of the present application, an air conditioning system is also provided, which comprises the above-mentioned frequency converter cabinet.

[0030] It is easy for those skilled in the art to understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0031] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A frequency converter cabinet comprising a cabinet (4), characterized in that The bottom of the inner space of the box (4) is provided with a support frame (3), the top of the support frame (3) is provided with a first mounting surface for mounting an electrical module, and the support frame (3) is internally provided with a heat dissipation module (1). The heat dissipation module (1) comprises an air duct housing (11) provided with an air outlet (113) and an air inlet (111). The airflow in the air duct housing (11) can flow out of the air outlet (113), exchange heat with the electrical module, and then flow back into the air duct housing (11) from the air inlet (111). The air duct housing (11) comprises a horizontal plate body and first and second vertical standing plates extending downward from adjacent two sides of the horizontal plate body. The box (4) further comprises a standing plate in the shape of U when viewed from above. The box (4) comprises a bottom plate (32), and the bottom end of the standing plate is connected to the outer side of the standing wall of the bottom plate (32) to form an airflow passage together with the bottom plate (32) and the air duct housing (11). A heat exchanger operation window is formed on the standing plate away from the first and second vertical standing plates. A heat exchanger assembly (5) is pullably assembled in the air duct housing (11) through the heat exchanger operation window. The heat exchanger assembly (5) comprises a mounting fixed plate (12) and an evaporator connected to the first side of the mounting fixed plate (12). The mounting fixed plate (12) is detachably connected to the heat exchanger operation window to block the heat exchanger operation window, and the evaporator is detachably connected to the air inlet (111). The first mounting surface is connected with a reinforcing rib (33).

2. The frequency changer cabinet of claim 1, wherein, The electrical module comprises a main control component assembled on the first mounting surface and located corresponding to the air outlet (113). The support frame (3) is a cubic frame structure, and each of the six walls of the cubic frame structure is provided with a plurality of lightening holes.

3. The frequency changer cabinet of claim 2, wherein, The air duct housing (11) is further provided with a fan operation window (112), and a fan assembly (2) is pullably assembled in the air duct housing (11) through the fan operation window (112).

4. The frequency changer cabinet of claim 3, wherein, The fan operation window (112) corresponds to one of the plurality of lightening holes.

5. The frequency changer cabinet of claim 3 wherein, The bottom plate (32) is connected to the bottom wall of the support frame (3), the bottom ends of the first and second vertical standing plates are detachably connected to the inner surface of the bottom plate (32), the air outlet (113) and the air inlet (111) are formed on the horizontal plate body, and the fan operation window (112) is formed on one of the first and second vertical standing plates.

6. The frequency changer cabinet of claim 5, wherein, The bottom plate (32) is provided with a water outlet (37).

7. The frequency changer cabinet of claim 6, wherein, The inner surface of the bottom plate (32) is connected with a first connecting plate (35) and a second connecting plate (36), the first connecting plate (35) and the second connecting plate (36) are vertically connected to form a right angle connecting portion, and the bottom ends of the first and second vertical standing plates are connected to the right angle connecting portion, respectively.

8. An air conditioning system characterized by, A frequency converter cabinet comprising any one of claims 1 to 7.

Images