Pumping heat dissipation device in frequency conversion cabinet

Abstract

The utility model relates to a pumping and draining heat dissipation device in a frequency conversion cabinet, which comprises an exhaust fan, an air guide pipe, a venturi tube and a heat pumping pipe, the exhaust fan is arranged at the inner top of the frequency conversion cabinet, one end of the air guide pipe is communicated with an air outlet of the exhaust fan, and the other end of the air guide pipe penetrates through the top of the frequency conversion cabinet and then is communicated with an inlet section of the venturi tube; one end of the heat extraction pipe is communicated with the throat of the Venturi tube, and the other end of the heat extraction pipe extends into the frequency conversion cabinet and is arranged at a frequency converter in the frequency conversion cabinet; an inlet section and a diffusion section are symmetrically arranged on the two sides of the top of the throat correspondingly. The beneficial effects of the utility model are that by utilizing the negative pressure difference formed by the venturi tube, hot air exhausted by the frequency converter is directly extracted through the heat extraction pipe, and hot air in the frequency conversion cabinet is extracted through the auxiliary exhaust fan, so that the heat dissipation performance of the frequency conversion cabinet is effectively improved, and overheating of the frequency conversion cabinet and easy burnout of internal electrical components are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation in frequency conversion cabinets, in particular to an exhaust heat dissipation device in a frequency conversion cabinet. Background Art

[0002] The variable frequency control cabinet is called the variable frequency cabinet for short. It is mainly used to adjust the working frequency of the equipment, reduce energy loss, start the equipment smoothly, and reduce the damage to the motor caused by the large current generated when the equipment is directly started. At the same time, it has analog input (speed control or feedback signal), PID control, pump switching control (for constant pressure), communication function, macro function (different parameter settings for different occasions), multi-speed, etc. It can be used for automatic control of industrial and agricultural production and water supply, drainage, fire protection, sprinkler network boosting, HVAC hot and cold water circulation and other occasions.

[0003] The common frequency converter cabinets on the market all dissipate heat through the exhaust fans on the top. The ambient temperature is high in summer, and the high-frequency operation of the frequency converter inside the frequency converter cabinet will also generate a lot of heat. The exhaust fans alone are no longer able to completely and effectively dissipate heat, causing the frequency converter cabinet to overheat and the internal electrical components to burn out. Utility Model Content

[0004] The technical problem to be solved by the utility model is to study an exhaust and heat dissipation device in a frequency conversion cabinet, which works together with an exhaust fan to improve the heat dissipation efficiency of the frequency conversion cabinet.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A heat extraction and extraction device in a frequency conversion cabinet comprises an exhaust fan, an air duct, a venturi tube and a heat extraction pipe, wherein the exhaust fan is arranged at the inner top of the frequency conversion cabinet, one end of the air duct is connected to the air outlet of the exhaust fan, and the other end passes through the top of the frequency conversion cabinet and is connected to the inlet section of the venturi tube, one end of the heat extraction pipe is connected to the throat of the venturi tube, and the other end extends into the interior of the frequency conversion cabinet and is arranged at the frequency converter inside the frequency conversion cabinet; the inlet section and the diffusion section are symmetrically arranged on both sides of the top of the throat.

[0007] The beneficial effects of the utility model are as follows: the exhaust fan is used as a power source, and the hot air enters the venturi tube through the air duct. The flowing hot air forms a pressure difference after passing through the venturi tube, and the hot air exhausted by the inverter is extracted by the heat extraction pipe, and the hot air is then discharged to the outside of the inverter cabinet together with the hot air extracted by the exhaust fan through the diffusion section of the venturi tube; the negative pressure difference formed by the venturi tube is utilized to directly extract the hot air exhausted by the inverter through the heat extraction pipe, and the exhaust fan is assisted to extract the hot air in the inverter cabinet, thereby effectively improving the heat dissipation performance of the inverter cabinet, avoiding overheating of the inverter cabinet, and preventing the internal electrical components from being easily burned.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the diffusion section is provided with a check valve.

[0010] Furthermore, it also includes an air inlet fan, which is arranged on the bottom side of the frequency conversion cabinet.

[0011] Furthermore, it also includes an air drying box and a cold air delivery pipe, the inlet end of the air drying box is connected to the cold air delivery pipe, and the outlet end of the air drying box is connected to the air inlet of the air inlet fan.

[0012] Furthermore, the cold air delivery pipe adopts a U-shaped pipe, the inlet end of the air drying box is connected to the middle of the U-shaped pipe, and the two ports of the U-shaped pipe are arranged at the cold air supply location.

[0013] Furthermore, the air drying box is connected to the air inlet of the fan and to the cold air delivery pipe by detachable connecting pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a heat extraction and cooling device in a frequency conversion cabinet of the utility model;

[0015] Figure 2 It is a partial structural sectional view of an exhaust and heat dissipation device in a frequency conversion cabinet of the utility model.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1. Frequency conversion cabinet; 11. Frequency converter; 2. Exhaust fan; 3. Air duct; 4. Venturi tube; 41. Inlet section; 42. Throat; 43. Diffusion section; 5. Heat extraction pipe; 6. Air drying box; 7. Cold air delivery pipe; 8. Inlet fan; 9. Removable connecting pipe. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] like Figures 1-2 As shown, embodiment 1 of the utility model is an exhaust and heat dissipation device in a frequency conversion cabinet, comprising an exhaust fan 2, an air duct 3, a venturi tube 4 and a heat extraction pipe 5. The exhaust fan 2 is arranged at the inner top of the frequency conversion cabinet 1, one end of the air duct 3 is connected to the air outlet of the exhaust fan 2, and the other end passes through the top of the frequency conversion cabinet 1 and is connected to the inlet section 41 of the venturi tube 4, one end of the heat extraction pipe 5 is connected to the throat 42 of the venturi tube 4, and the other end extends into the interior of the frequency conversion cabinet 1 and is arranged at the frequency converter 11 inside the frequency conversion cabinet 1; the inlet section 41 and the diffusion section 43 are symmetrically arranged on both sides of the top of the throat 42.

[0020] The exhaust fan 2 serves as a power source, and the hot air enters the venturi tube 4 through the air duct 3. The flowing hot air forms a pressure difference after passing through the venturi tube 4, and the heat extraction pipe 5 extracts the hot air discharged from the inverter 11. The hot air is then discharged to the outside of the frequency conversion cabinet 1 together with the hot air extracted by the exhaust fan 2 through the diffusion section 43 of the venturi tube 4. The negative pressure difference formed by the venturi tube 4 is utilized to directly extract the hot air discharged from the inverter 11 through the heat extraction pipe 5, and the exhaust fan 2 is assisted in extracting the hot air in the frequency conversion cabinet 1, thereby effectively improving the heat dissipation performance of the frequency conversion cabinet 1, avoiding overheating of the frequency conversion cabinet 1, and preventing the internal electrical components from being easily burned.

[0021] Embodiment 2 of the utility model is a heat dissipation device in a frequency conversion cabinet. Based on embodiment 1, a check valve is provided in the diffusion section 43. The check valve is provided so that the diffusion section 43 can only discharge air but not take in air, thereby preventing external air from directly entering the frequency conversion cabinet 1 and causing dust to be contaminated on the electrical components in the frequency conversion cabinet 1.

[0022] Embodiment 3 of the utility model is a heat dissipation device for extracting and dissipating heat in a frequency conversion cabinet. Based on embodiment 1, it further includes an inlet fan 8, and the bottom side of the frequency conversion cabinet 1 is provided with the inlet fan 8. The inlet fan 8 cooperates with the exhaust fan 2 to improve the circulation of air inside the frequency conversion cabinet 1, and further improve the heat dissipation performance of the frequency conversion cabinet 1. In a specific implementation, a plurality of inlet fans 8 are provided on the bottom side of the frequency conversion cabinet 1.

[0023] Embodiment 4 of the utility model is a heat dissipation device for extracting and dissipating in a frequency conversion cabinet. On the basis of embodiment 3, it also includes an air drying box 6 and a cold air delivery pipe 7. The inlet end of the air drying box 6 is connected to the cold air delivery pipe 7, and the outlet end of the air drying box 6 is connected to the air inlet of the intake fan 8. The cold air delivery pipe 7 and the intake fan 8 continuously deliver cold air to the frequency conversion cabinet 1. The cold air expands due to heat in the frequency conversion cabinet 1, and its specific gravity becomes lighter, so it rises upward and enters the air inlet of the exhaust fan 2, further accelerating the circulation of the air inside the frequency conversion cabinet 1 and further improving the heat dissipation performance of the frequency conversion cabinet 1; and the cold air exchanges heat with the hot air in the frequency conversion cabinet 1, which further improves the heat dissipation performance of the frequency conversion cabinet 1. When the room temperature reaches the highest temperature throughout the year, this embodiment is adopted to effectively ensure the heat dissipation of the frequency conversion cabinet 1, and the cold air delivery pipe 7 can directly extract the cold air from the air-conditioned room.

[0024] Embodiment 5 of the utility model is a heat dissipation device in a frequency conversion cabinet. Based on embodiment 4, the cold air delivery pipe 7 adopts a U-shaped pipe, the inlet end of the air drying box 6 is connected to the middle of the U-shaped pipe, and the two ports of the U-shaped pipe are arranged at the cold air supply. For example, the two ports of the U-shaped pipe are arranged in the same air-conditioning room to realize the circulation of cold air.

[0025] Embodiment 6 of the utility model is an exhaust and heat dissipation device in a frequency conversion cabinet. Based on any one of embodiments 1 to 5, the air drying box 6 is connected to the air inlet of the fan 8, and is connected to the cold air delivery pipe 7 by a detachable connecting pipe 9. The detachable connecting pipe 9 facilitates the replacement of the air drying box 6. It ensures that the air drying box 6 removes water vapor in the cold air, and prevents water vapor from entering the frequency conversion cabinet 1 to damage the internal electrical components, or cause a short circuit.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat dissipation device in a frequency conversion cabinet, characterized in that: The invention comprises an exhaust fan (2), an air guide duct (3), a venturi tube (4) and a heat extraction pipe (5), wherein the exhaust fan (2) is arranged at the inner top of a frequency conversion cabinet (1), one end of the air guide duct (3) is connected to the air outlet of the exhaust fan (2), and the other end thereof passes through the top of the frequency conversion cabinet (1) and is connected to the inlet section (41) of the venturi tube (4); one end of the heat extraction pipe (5) is connected to the throat (42) of the venturi tube (4), and the other end thereof extends into the interior of the frequency conversion cabinet (1) and is arranged at the frequency converter (11) inside the frequency conversion cabinet (1); the inlet section (41) and the diffusion section (43) are symmetrically arranged on both sides of the top of the throat (42).

2. According to claim 1, the heat dissipation device in the frequency conversion cabinet is characterized in that: The diffusion section (43) is provided with a check valve.

3. According to claim 1, the heat dissipation device in the frequency conversion cabinet is characterized in that: It also comprises an air inlet fan (8), and the air inlet fan (8) is arranged on the bottom side of the frequency conversion cabinet (1).

4. According to claim 3, the heat dissipation device in the frequency conversion cabinet is characterized in that: It also includes an air drying box (6) and a cold air delivery pipe (7), wherein the inlet end of the air drying box (6) is connected to the cold air delivery pipe (7), and the outlet end of the air drying box (6) is connected to the air inlet of the air inlet fan (8).

5. According to claim 4, the heat dissipation device in the frequency conversion cabinet is characterized in that: The cold air delivery pipe (7) is a U-shaped pipe, the inlet end of the air drying box (6) is connected to the middle of the U-shaped pipe, and the two ports of the U-shaped pipe are arranged at the cold air supply location.

6. According to claim 4, the heat dissipation device in the frequency conversion cabinet is characterized in that: The air drying box (6) is connected to the air inlet of the fan (8), and is connected to the cold air delivery pipe (7) by a detachable connecting pipe (9).

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