Self-operated heat dissipation air-cooled frequency conversion cabinet

Abstract

The utility model discloses a self-operated heat dissipation air-cooled frequency conversion cabinet, which relates to the frequency conversion cabinet field, and comprises a cabinet body, a door plate, a middle isolation plate, a heat dissipation air duct coaming and a frequency converter, the front side of the cabinet body is provided with the door plate which can be opened and closed relatively, the middle isolation plate is arranged in the cabinet body, the internal space of the cabinet body is divided into a lower space and an upper space, and the frequency converter is arranged in the lower space. The frequency converter is installed in the lower space, a notch is formed in the position, corresponding to the frequency converter, of the middle isolation plate, and a heat dissipation air channel surrounding plate is detachably installed between an air outlet located in the top of the frequency converter and the notch to form a heat dissipation air channel used for communicating the lower space with the upper space. The outer wall of the lower part of the cabinet body is provided with an air inlet communicated with the lower space, and the outer wall of the upper part of the cabinet body is provided with a plurality of ventilation holes communicated with the upper space. According to the utility model, the fan of the air-cooled frequency converter is utilized to automatically dissipate heat to the outside of the frequency conversion cabinet, thereby reducing heat dissipation matching of the frequency conversion cabinet.

Description

Technical Field

[0001] The utility model relates to the field of frequency conversion cabinets, in particular to an air-cooled frequency conversion cabinet with self-heating function. Background Art

[0002] Frequency converters typically need to be assembled into a complete frequency converter cabinet before being put into use. Frequency converters generate considerable heat during operation, placing certain requirements on the cabinet's heat dissipation design. Currently, the most widely used general-purpose frequency converters are primarily air-cooled, with built-in cooling fans used to ventilate and remove heat from their heat sinks. After the hot air from the frequency converter enters the frequency converter cabinet, it also needs to be further exhausted from the cabinet itself, otherwise the heat will gradually accumulate and ultimately affect the normal operation of the frequency converter. Existing air-cooled frequency converter cabinets primarily utilize cooling fans with a greater air volume than the frequency converter itself to achieve positive heat removal. For frequency converter cabinets with higher power and heat generation, air conditioning fan cooling can be used to meet these cooling requirements.

[0003] The cooling components of the inverter cabinet mentioned above increase design and manufacturing costs. Furthermore, similar configurations like air conditioning fan coils require an external cooling source, making implementation more complex. However, air-cooled inverters have built-in cooling fans. Using these fans to dissipate heat directly outside the cabinet can significantly reduce the cost of cooling components. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a self-heating air-cooled frequency conversion cabinet, which uses the fan of the air-cooled frequency converter to dissipate heat outside the frequency conversion cabinet, thereby reducing the heat dissipation equipment of the frequency conversion cabinet.

[0005] The purpose of the present utility model is achieved through the following technical solutions: this self-heating air-cooled frequency conversion cabinet includes a cabinet body, door panels, an intermediate isolation plate, a heat dissipation duct enclosure and a frequency converter. The front of the cabinet body is equipped with relatively open and closeable door panels, the intermediate isolation plate is installed in the cabinet body, and the internal space of the cabinet body is separated into a lower space and an upper space. The frequency converter is installed in the lower space, and a gap is provided on the intermediate isolation plate at a position corresponding to the frequency converter. The heat dissipation duct enclosure is detachably installed between the air outlet at the top of the frequency converter and the gap to form a heat dissipation duct for connecting the lower space and the upper space; an air inlet connected to the lower space is provided on the lower outer wall of the cabinet body, and a plurality of ventilation holes connected to the upper space are provided on the upper outer wall of the cabinet body.

[0006] The heat dissipation air duct enclosure includes an enclosure body, and the upper part, side part and bottom part of the enclosure body are all turned outward to form an enclosure upper turn-up, an enclosure side turn-up and an enclosure bottom turn-up.

[0007] The flanged surface of the enclosure is provided with a number of waist-shaped holes which are connected to the rivet nuts pre-installed on the middle isolation plate, thereby being fixed to the middle isolation plate; the side flanges of the enclosure are connected and fixed to the cabinet body through the circular positioning holes provided on the surface; the bottom flange of the enclosure fits with the top of the inverter, serving as a reference for the installation position of the inverter.

[0008] The ventilation holes are arranged on the four surfaces of the upper part of the cabinet body, the air inlet is arranged on the side surface of the lower part of the cabinet body, and the air inlet is installed on the air inlet.

[0009] A power supply line sealing plate is also provided on the outer wall of the cabinet for users to input power lines.

[0010] A lifting reinforcement plate is fixed on the top of the cabinet body for installing lifting ears.

[0011] The door panel is connected to the cabinet body through a hinge, and a door lock, an air switch handle and a frequency converter operation panel are installed on the door panel, wherein the air switch handle and the frequency converter operation panel are electrically connected to control the frequency converter.

[0012] The beneficial effects of the utility model are:

[0013] 1. The hot air exhausted by the inverter through its own fan can be discharged from the cabinet through the heat dissipation duct, upper space and ventilation holes in sequence. The inverter cabinet does not need to be equipped with additional heat dissipation components such as cooling fans and air conditioning fan coils, thus reducing the cost of the inverter cabinet.

[0014] 2. The heat dissipation duct enclosure is designed to be conveniently detachable and is fixed to the cabinet body and the intermediate isolation plate using self-tapping screws, bolts / rivet nuts. This ensures stability and sealing while also facilitating subsequent inverter disassembly and maintenance.

[0015] 3. The ventilation holes are directly opened on the top of the cabinet, without the need for additional components such as air hoods, which reduces the number of components of the frequency converter cabinet, simplifies the installation process, shortens the working hours, and increases the overall coordination and beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure behind the hidden door panel of the utility model Figure 1 .

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure behind the hidden door panel of the utility model Figure 2 .

[0019] Figure 4 This is a schematic structural diagram of the heat dissipation duct enclosure in the present invention.

[0020] Description of the drawing reference numerals: cabinet body 1, door panel 2, intermediate partition board 3, heat dissipation air duct enclosure 4, frequency converter 5, hoisting reinforcement plate 6, lifting lug 7, ventilation hole 11, air inlet 12, power supply incoming line sealing plate 13, air switch handle 21, door lock 22, frequency converter operation panel 23, notch 31, air outlet 51, lower space 101, upper space 102, heat dissipation air duct 103, enclosure body 201, enclosure upper flanging 202, enclosure side flanging 203, enclosure bottom flanging 204, waist-shaped hole 205, circular positioning hole 206. Detailed implementation manners

[0021] The following will introduce the present utility model in detail with reference to the drawings:

[0022] Embodiment: As shown in the attached Figures 1 to 4 drawing, this self-powered heat dissipation air-cooled frequency conversion cabinet includes a cabinet body 1, a door panel 2, an intermediate partition board 3, a heat dissipation air duct enclosure 4, a frequency converter 5, a hoisting reinforcement plate 6, a lifting lug 7, a ventilation hole 11, an air inlet 12, a power supply incoming line sealing plate 13, an air switch handle 21, a door lock 22, a frequency converter operation panel 23, a notch 31, an air outlet 51, a lower space 101, an upper space 102, a heat dissipation air duct 103, an enclosure body 201, an enclosure upper flanging 202, an enclosure side flanging 203, an enclosure bottom flanging 204, a waist-shaped hole 205 and a circular positioning hole 206.

[0023] Referring to the attached Figure 1 drawing, the cabinet body 1 is formed by welding multiple sheet metals, and ventilation holes 11, air inlets 12 and power supply incoming line sealing plates 13 are arranged thereon. Among them, the ventilation holes 11 serve as the air outlets of the frequency conversion cabinet, the air inlets 12 serve as the air inlets of the frequency conversion cabinet, and the power supply incoming line sealing plates 13 serve as the user power supply incoming lines. A hoisting reinforcement plate 6 is also welded on the top inside the cabinet body 1, which can not only strengthen the structural strength weakened by the ventilation holes 11, but also facilitate fastening the lifting lugs 7 and distributing the hoisting force. Oppositely-opening and closing door panels 2 are installed on the front of the cabinet body 1. The door panels 2 are connected to the cabinet body 1 through hinges, and door locks 22 are installed thereon. At the same time, an air switch handle 21 and a frequency converter operation panel 23 can also be installed to facilitate safe power-off when opening the cabinet and setting adjustment of the frequency converter. The air switch handle 21 and the frequency converter operation panel 23 control the frequency converter 5 through electrical connection. Preferably, the ventilation holes 11 are opened on the four upper surfaces of the cabinet body 1, the air inlets 12 are opened on the side surface of the lower part of the cabinet body 1, and air inlet filters are installed on the air inlets 12.

[0024] As Figure 2 、 3As shown, an intermediate isolation plate 3 is welded in the middle of the cabinet 1 to separate the internal space of the cabinet 1 into a lower space 101 and an upper space 102. The inverter 5 is installed in the lower space 101, and a notch 31 is provided on the intermediate isolation plate 3 at a position corresponding to the inverter 5. Except for the notch 31, there is no other connecting channel between the lower space 101 and the upper space 102.

[0025] The heat dissipation duct panel 4 is detachably mounted between the air outlet 51 and the notch 31 on the top of the inverter 5, thereby forming a heat dissipation duct 103 for connecting the lower space 101 and the upper space 102. The lower outer wall of the cabinet 1 is provided with an air inlet 12 connected to the lower space 101, and the upper outer wall of the cabinet 1 is provided with a plurality of ventilation holes 11 connected to the upper space 102. Figure 4 As shown, the heat dissipation duct enclosure 4 includes an enclosure body 201, with the upper, side, and bottom portions of the enclosure body 201 all flanged outward to form an upper enclosure flange 202, a side enclosure flange 203, and a bottom enclosure flange 204. The enclosure body 201 and the cabinet 1 form a heat dissipation duct 103, which serves as a flow-limiting passage for directional exhaust of the inverter 5 toward the upper space 102. The upper enclosure flange 202 is connected to the pre-installed rivet nuts on the intermediate isolation plate 3 using bolt waist holes 205, thereby securing it to the intermediate isolation plate 3. The side enclosure flange 203 is connected to the cabinet 1 using self-tapping screws through circular positioning holes 206. The bottom enclosure flange 204 fits against the top of the inverter 5, serving as a reference for the inverter 5's installation position and reducing air leakage. Preferably, the outer dimensions of the heat dissipation duct enclosure 4 are customized according to the inverter 5 to ensure the fit with the top exhaust port of the inverter 5 and to avoid exhaust air leakage into the lower space 101 as much as possible, causing the adverse effect of heat accumulation therein.

[0026] The working process of this utility model:

[0027] First, the cooling fan of the inverter 5 draws in cooler air from outside the inverter cabinet through the air inlet 12 (air inlet filter) at the bottom of the cabinet 1. After absorbing the heat generated by the operation of the inverter 5, hot exhaust air is discharged from the air outlet 51 at the top of the inverter 5. The hot exhaust air is then directed and restricted to the upper space 102 through the heat dissipation duct 103 formed by the cabinet 1 and the heat dissipation duct enclosure 4, without entering the lower space 101 and causing heat accumulation. Subsequently, due to the inertia of the flow rate, the exhaust air continues to diffuse in the upper space 102 and is eventually discharged from the inverter cabinet through the ventilation holes 11 around the top of the cabinet 1, completing the entire heat dissipation cycle.

[0028] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A self-powered cooling air-cooled variable frequency cabinet, characterized in that: It includes a cabinet body (1), a door panel (2), an intermediate partition board (3), a heat dissipation air duct enclosure (4), and a frequency converter (5). The front of the cabinet body (1) is installed with the door panel (2) that opens and closes relatively. The intermediate partition board (3) is installed inside the cabinet body (1) to separate the internal space of the cabinet body (1) into a lower space (101) and an upper space (102). The frequency converter (5) is installed in the lower space (101), and a notch (31) is opened at a position corresponding to the frequency converter (5) on the intermediate partition board (3). A heat dissipation air duct enclosure (4) is detachably installed between the air outlet (51) at the top of the frequency converter (5) and the notch (31) to form a heat dissipation air duct (103) for communicating the lower space (101) and the upper space (102). An air inlet (12) communicating with the lower space (101) is provided on the lower outer wall of the cabinet body (1), and a plurality of ventilation holes (11) communicating with the upper space (102) are opened on the upper outer wall of the cabinet body (1).

2. The self-powered air-cooled variable-frequency cabinet with self-cooling according to claim 1, characterized in that: The heat dissipation air duct enclosure (4) includes an enclosure main body (201), and the upper part, side part, and bottom of the enclosure main body (201) are all turned outwards to form an upper enclosure flange (202), a side enclosure flange (203), and a bottom enclosure flange (204).

3. The self-powered air-cooled variable-frequency cabinet with self-cooling according to claim 2, characterized in that: A plurality of waist-shaped holes (205) are opened on the surface of the upper enclosure flange (202) and connected with the rivet nuts pre-installed on the intermediate partition board (3), so as to be fixed to the intermediate partition board (3). The side enclosure flange (203) is connected and fixed to the cabinet body (1) through circular positioning holes (206) opened on the surface. The bottom enclosure flange (204) fits with the top of the frequency converter (5) and serves as the installation position positioning reference for the frequency converter (5).

4. The self-powered cooling air-cooled variable-frequency cabinet according to claim 1, characterized in that: The ventilation holes (11) are opened on the four surfaces of the upper part of the cabinet body (1), and the air inlet (12) is opened on the side surface of the lower part of the cabinet body (1), and an air inlet filter is installed on the air inlet (12).

5. The self-powered cooling air-cooled variable frequency cabinet according to claim 1, characterized in that: A power supply incoming line sealing plate (13) is also provided on the outer wall of the cabinet body (1) for the user's power supply incoming line.

6. The self-powered cooling air-cooled variable frequency cabinet according to claim 1, characterized in that: A hoisting reinforcement plate (6) is fixed to the top of the cabinet body ( 7. The self-powered air-cooled variable-frequency cabinet with self-cooling according to claim 1, characterized in that: ​

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