Frequency conversion cabinet with high-protection independent air duct

Abstract

The frequency conversion cabinet with the high-protection independent air duct comprises a cabinet body, a cabinet body front cavity, a cabinet body rear cavity and an air duct assembly, a rainproof air inlet window and an air outlet window are arranged on a rear cabinet door, and the frequency conversion cabinet is characterized in that the air duct assembly is composed of a rear partition plate, an air inlet and outlet partition plate and an axial flow fan, and a heat dissipation air duct is formed between the rear partition plate and a middle partition plate; the upper and lower parts of the cabinet body rear cavity are respectively an air outlet cavity and an air inlet cavity; the axial flow fan is used for pumping air in the heat dissipation air duct into the air outlet cavity; the electronic devices except the axial flow fan are all arranged in the front cavity of the cabinet body, and an inversion radiator and a rectification radiator are arranged in the heat dissipation air channel. According to the frequency conversion cabinet with the high-protection independent air duct, the air cooling air flow always circularly flows in the rear cavity of the cabinet body and does not contact with electrical devices in the front cavity of the cabinet body, so that even if the frequency conversion cabinet is applied to an environment with more dust, the influence of impurities such as dust on electronic components can be effectively avoided, and the service life of frequency conversion equipment can be remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to a frequency conversion cabinet, and more specifically, to a frequency conversion cabinet with a highly protected independent air duct. Background Art

[0002] The common heat dissipation method for frequency converters is air cooling. When the frequency converter equipment is applied in a dusty environment, dust in the air will enter the equipment interior through the air duct. Since there are many electronic components inside the frequency converter, the dust will gradually accumulate inside the equipment. After long-term operation, it may cause damage to the equipment and reduce the service life of the equipment. Therefore, the utility model proposes a frequency conversion cabinet with an independent air duct, which can effectively avoid the adverse effects of dust on the electronic components inside the frequency converter. Summary of the Invention

[0003] The utility model provides a frequency conversion cabinet with a highly protected independent air duct to overcome the above technical problems.

[0004] The frequency conversion cabinet with a highly protected independent air duct of the utility model includes a cabinet body and a front cabinet cavity, a rear cabinet cavity and an air duct assembly arranged in the cabinet body. The periphery of the cabinet body is provided with a front cabinet door, a rear cabinet door and side wall plates on both sides. A rainproof air inlet window and a rainproof air outlet window are respectively arranged on the lower side and the upper side of the rear cabinet door. An intermediate partition is arranged between the front cabinet cavity and the rear cabinet cavity to isolate them from each other. It is characterized in that: the air duct assembly is composed of a rear partition, an air inlet and outlet partition and an axial flow fan. The rear partition is located behind the intermediate partition, and a heat dissipation air duct is formed between the rear partition and the intermediate partition. The upper part and the lower part of the rear cabinet cavity are respectively an air outlet cavity and an air inlet cavity, and the air inlet cavity and the air outlet cavity are isolated from each other by the intermediate partition;

[0005] The air inlet cavity is communicated with the rainproof air inlet window and the bottom of the heat dissipation air duct, the air outlet cavity is communicated with the upper part of the heat dissipation air duct and the rainproof air outlet window, and the axial flow fan is arranged at the upper end of the rear partition. The axial flow fan is used to pump the air in the heat dissipation air duct into the air outlet cavity; Except for the axial flow fan, the electronic devices are all arranged in the front cabinet cavity of the cabinet body, and an inverter radiator and a rectifier radiator are arranged in the heat dissipation air duct.

[0006] In the frequency conversion cabinet with a highly protected independent air duct of the utility model, a mesh grille is arranged on the inner sides of both the rainproof air inlet window and the rainproof air outlet window, and a layer of filter cotton is arranged on the outer side of the mesh grille on the inner side of the rainproof air inlet window.

[0007] In the frequency conversion cabinet with a highly protected independent air duct of the utility model, left bottom partitions and right bottom partitions which are horizontally spaced are respectively arranged on both sides of the bottom of the heat dissipation air duct.

[0008] In the frequency conversion cabinet with a highly protected independent air duct of the utility model, the number of the rear cabinet doors is two, and rainproof air inlet windows and rainproof air outlet windows are arranged on both of the two rear cabinet doors.

[0009] The frequency conversion cabinet with a highly protected independent air duct of the present utility model has an arc-shaped top plate with a middle part higher and two sides lower at the top of the cabinet body.

[0010] The beneficial effects of the present utility model are as follows: In the frequency conversion cabinet with a highly protected independent air duct of the present utility model, a front cavity, a rear cavity and an air duct assembly are provided in the cabinet body of the frequency conversion cabinet. The air duct assembly forms an air inlet cavity, a heat dissipation air duct and an air outlet cavity. Only an axial flow fan is arranged above the heat dissipation air duct in the rear cavity of the cabinet body, and electronic devices except the axial flow fan are arranged in the front cavity of the cabinet body. In this way, under the exhaust action of the axial flow fan, the low-temperature air outside sequentially enters the heat dissipation air duct through the rain-proof air inlet window and the air inlet cavity. During the process of the low-temperature air flowing in the heat dissipation air duct, the heat dissipated by the rectifier radiator and the inverter radiator is carried away, and then it is discharged through the air outlet cavity and the rain-proof air outlet window in sequence. Since the air-cooled air flow always circulates in the rear cavity of the cabinet body and does not contact the electrical devices in the front cavity of the cabinet body, even when applied in an environment with more dust, it can effectively avoid the influence of dust and other impurities on the electronic components, and can significantly increase the service life of the frequency conversion equipment.

[0011] Furthermore, mesh grilles are provided on the inner sides of both the rain-proof air inlet window and the rain-proof air outlet window, and a layer of filter cotton is provided on the mesh grille on the inner side of the rain-proof air inlet window. Under the filtering action of the filter cotton, it can further prevent dust and other impurities outside from entering the rear cavity of the cabinet body; when maintaining and replacing the filter cotton, only need to open the rear cabinet door, and then the filter cotton can be replaced conveniently and quickly, which can effectively reduce the maintenance time and greatly increase the convenience of use. Description of the Drawings

[0012] Figure 1 is the front view of the frequency conversion cabinet with a highly protected independent air duct of the present utility model;

[0013] Figure 2 is the rear view of the frequency conversion cabinet with a highly protected independent air duct of the present utility model;

[0014] Figure 3 is the left view of the frequency conversion cabinet with a highly protected independent air duct of the present utility model;

[0015] Figure 4 is the top view of the frequency conversion cabinet with a highly protected independent air duct of the present utility model;

[0016] Figure 5 is Figure 4 the cross-sectional view of the A-A section in

[0017] Figure 6 is the cross-sectional view of the frequency conversion cabinet with a highly protected independent air duct of the present utility model;

[0018] Figure 7Stereogram of the variable frequency cabinet with a highly protected independent air duct of the present utility model;

[0019] Figure 8 Working principle diagram of the variable frequency cabinet with a highly protected independent air duct of the present utility model.

[0020] In the figure: 1 cabinet body, 2 front cavity of the cabinet body, 3 rear cavity of the cabinet body, 4 middle partition board, 5 front cabinet door, 6 rear cabinet door, 7 side wall board, 8 rainproof air inlet window, 9 rainproof air outlet window, 10 air inlet cavity, 11 air outlet cavity, 12 heat dissipation air duct, 13 rear partition board, 14 air inlet and outlet partition board, 15 inverter radiator, 16 rectifier radiator, 17 left bottom partition board, 18 right bottom partition board, 19 air flow, 20 axial flow fan, 21 mesh grille. Specific implementation mode

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] As Figures 1 to 4 shown, the front view, rear view, left view and top view of the variable frequency cabinet with a highly protected independent air duct of the present utility model are respectively given, Figure 5 The Figure 4 sectional view of the A-A section in Figure 6 is given, Figure 7 and

[0023] its sectional view and stereogram are given. The shown variable frequency cabinet with a highly protected independent air duct is composed of a cabinet body 1 and a front cavity 2, a rear cavity 3 and an air duct assembly arranged in the cabinet body 1. The front cabinet door 5, rear cabinet door 6 and two side wall boards 7 are arranged around the cabinet body 1. A vertical middle partition board 4 is arranged inside the cabinet body 1, and the middle partition board 4 separates the front cavity 2 and the rear cavity 3 of the cabinet body into non-communicating cavities. The air duct assembly is arranged in the rear cavity 3 of the cabinet body. The air duct assembly includes a rear partition board 13, an air inlet and outlet partition board 14 and an axial flow fan 20. The rear partition board 13 is located behind the middle partition board 14, and a heat dissipation air duct 12 is formed between the rear partition board 13 and the middle partition board 4. The axial flow fan 20 is arranged at the upper end of the heat dissipation air duct 12.

[0024] As Figure 8As shown, a working principle diagram of the frequency conversion cabinet with high protection independent air duct of the utility model is given. Under the exhaust action of the axial flow fan 20, the external low-temperature air enters the heat dissipation duct 12 through the rainproof air inlet window 8 and the air inlet cavity 10 in turn. The airflow 19 takes away the heat emitted by the inverter radiator 15 and the rectifier radiator 16 in the heat dissipation duct 12, and discharges it through the air outlet cavity 11 and the rainproof air outlet window 9, finally realizing the heat dissipation of the frequency conversion equipment during operation.

[0025] It can be seen that during the entire heat dissipation process of the air flow 19 flowing through the heat dissipation duct 12, it will not come into contact with the electronic components in the front cavity 2 of the cabinet, thereby avoiding contact between dust and other impurities in the air and the electronic components of the frequency conversion equipment. Therefore, even if the frequency conversion equipment is used in an environment with a lot of dust, the influence of dust and other impurities on the electronic components can be effectively avoided, which can significantly increase the service life of the frequency conversion equipment.

[0026] The rainproof air inlet window 8 and the rainproof air outlet window 9 are both provided with a mesh grille 21 on the inner side of the rainproof air inlet window 8. A layer of filter cotton is provided on the outer side of the mesh grille 21 on the inner side of the rainproof air inlet window 8. The filter cotton first filters out dust from the air entering through the rainproof air inlet window 8, thereby reducing the dust content in the air entering the air inlet chamber 10 and the heat dissipation duct 12 through the rainproof air inlet window 8. To ensure the heat dissipation effect, the filter cotton needs to be replaced regularly. When replacing the filter cotton, the rear cabinet door 6 can be opened to quickly and conveniently replace the filter cotton, which can effectively reduce maintenance time and increase convenience.

[0027] In order to increase the flow rate of the air flow 19 flowing through the heat dissipation duct 12, so as to efficiently and quickly carry away the heat emitted by the inverter radiator 15 and the rectifier radiator 16, a left bottom partition 17 and a right bottom partition 18 are respectively provided on both sides of the bottom of the heat dissipation duct 12. The left bottom partition 17 and the right bottom partition 18 are spaced apart, and an air inlet of the heat dissipation duct 12 is formed between the left bottom partition 17 and the right bottom partition 18. This makes the air inlet relatively small, which is conducive to increasing the flow rate of the air flow 19 entering the heat dissipation duct 12 and increasing the heat dissipation effect.

[0028] The illustrated rear cabinet body 1 has two doors 6, each equipped with a rainproof air inlet window 8 and a rainproof air outlet window 9. The dual-leaf design of the rear doors 6 reduces the space occupied when open, making it suitable for use in confined spaces. The top of the cabinet body 1 is provided with a high center and low side panels to facilitate the timely drainage of rainwater when used outdoors.

Claims

1. A frequency conversion cabinet with a highly protected independent air duct, comprising a cabinet body (1), a front cavity (2), a rear cavity (3) and an air duct assembly arranged in the cabinet body. The periphery of the cabinet body is provided with a front cabinet door (5), a rear cabinet door (6) and side wall panels (7). The lower side and the upper side of the rear cabinet door are respectively provided with a rainproof air inlet window (8) and a rainproof air outlet window (9). A middle partition plate (4) for separating them is arranged between the front cavity and the rear cavity of the cabinet body; It is characterized in that: The air duct assembly is composed of a rear partition (13), an air inlet and outlet partition (14) and an axial flow fan (20). The rear partition is located behind the middle partition, and a heat dissipation air duct (12) is formed between the rear partition and the middle partition. The upper and lower parts of the rear cavity of the cabinet body are respectively an air outlet cavity (11) and an air inlet cavity (10), and the air inlet cavity and the air outlet cavity are separated by the middle partition; The air inlet cavity communicates with the bottom of the rainproof air inlet window and the heat dissipation air duct, the air outlet cavity communicates with the upper part of the heat dissipation air duct and the rainproof air outlet window, and the axial flow fan is arranged at the upper end of the rear partition. The axial flow fan is used to pump the air in the heat dissipation air duct into the air outlet cavity; All the electronic devices except the axial flow fan are arranged in the front cavity of the cabinet body, and an inverter radiator (15) and a rectifier radiator (16) are arranged in the heat dissipation air duct.

2. The frequency conversion cabinet with a highly protected independent air duct according to claim 1, wherein: Mesh grilles (21) are arranged on the inner sides of the rainproof air inlet window (8) and the rainproof air outlet window (9), and a layer of filter cotton is arranged on the outer side of the mesh grille on the inner side of the rainproof air inlet window.

3. The variable-frequency cabinet with a highly protected independent air duct according to claim 1 or 2, characterized in that: On both sides of the bottom of the heat dissipation air duct (12), a left bottom partition (17) and a right bottom partition (18) which are horizontally spaced are respectively arranged.

4. The frequency conversion cabinet with a high-protection independent air duct according to claim 1 or 2, characterized in that: The number of the rear cabinet doors (6) is two, and rainproof air inlet windows (8) and rainproof air outlet windows (9) are arranged on both rear cabinet doors.

5. The frequency conversion cabinet with a highly protected independent air duct according to claim 1 or 2, characterized in that: The top of the cabinet body (1) is provided with an arc-shaped top plate with a middle high and two sides low.

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