Temperature regulation frequency conversion cabinet

Abstract

The utility model discloses a temperature regulation frequency conversion cabinet, which comprises a cabinet body, a cabinet door, two groups of temperature sensors and two groups of heat dissipation boxes, and the two groups of heat dissipation boxes are respectively arranged on the left side and the right side of the cabinet body. According to the utility model, the internal temperature and the external environment temperature of the cabinet body are detected through the temperature sensor, when the external environment temperature is not high, convection blowing is carried out through the fans in the two groups of heat dissipation boxes, heat in the cabinet body is taken away, and external air is supplemented to enter the cabinet body for heat exchange, so that the temperature is adjusted; when the external environment temperature is too high and convection heat dissipation of the fan does not play a role, the motor drives the cam to rotate, then the spray head of the nitrogen tank is extruded to spray liquid nitrogen mist towards the interior of the coil pipe, the liquid nitrogen mist rapidly cools the coil pipe, and meanwhile air in the forced cooling box is cooled; and then air in the forced cooling box is sucked by the fan, the duckbill valve is extruded open through the blowing pipe and the blowing nozzle, the air is blown into the cabinet body, forced cooling is carried out, and the purpose of rapid cooling can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency conversion cabinets, in particular to a temperature regulating frequency conversion cabinet. Background Art

[0002] For a 10KV high-voltage frequency converter cabinet, if it is equipped with a built-in air conditioner, the heat inside the high-voltage frequency converter cabinet can be discharged in time; but if it is not equipped with a built-in air conditioner, the heat dissipation problem inside the high-voltage frequency converter cabinet will be more serious, especially in the hot summer. If the heat inside the high-voltage frequency converter cabinet cannot be discharged in time, the temperature inside the high-voltage frequency converter cabinet will be too high. Excessive temperature will damage the circuit board, and in serious cases, it will affect the normal production process. There are many public technologies on the market that mention the control structure of the internal temperature of the frequency converter cabinet, which is controlled by a temperature sensor and a cooling structure. At present, the commonly used cooling methods for frequency converter cabinets include refrigerant cooling, water cooling, and air cooling.

[0003] Air cooling is suitable for inverter cabinets with small capacity and low heat dissipation; water cooling will cause safety hazards if leakage occurs, and has high process requirements for the water circulation system and a large amount of maintenance work in the later stage. When cooling with refrigerant, an electronic expansion valve is often added at the inlet of the inverter cabinet for throttling. After throttling, the low-temperature refrigerant enters the inverter cabinet for cooling. However, when the unit is under low load, the heat generated by the electrical components of this cooling method is small, the required refrigerant liquid flow is small, the opening of the electronic expansion valve is small, and the valve is frequently operated, which affects the control accuracy and service life of the electronic expansion valve. Therefore, it is necessary to further improve and optimize the temperature adjustment structure of the inverter cabinet. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a temperature regulating frequency conversion cabinet.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a temperature regulating frequency conversion cabinet, comprising a cabinet body, a cabinet door, two groups of temperature sensors and two groups of heat dissipation boxes, the two groups of heat dissipation boxes are respectively arranged on the left and right sides of the cabinet body, a fan is arranged in the heat dissipation box, the cabinet door is rotatably connected to the front wall of the cabinet body, a strong cooling box is fixedly connected to the top of the cabinet body and close to the rear wall, an opening is arranged on the rear wall of the strong cooling box, a filtering structure for filtering is arranged at the opening of the strong cooling box, and a strong cooling structure for rapidly cooling the air in the box is arranged inside the strong cooling box, The front wall of the forced cooling box is fixedly connected to a blower box, the interior of the blower box is fixedly connected to a fan via a partition, the fan inlet end is connected to the forced cooling box via a connecting pipe, the fan outlet end is fixedly connected to an air inlet pipe, the end of the air inlet pipe away from the fan passes through the front wall of the blower box and the upper wall of the cabinet in sequence and extends to the interior of the cabinet, the rear wall of the cabinet door is fixedly connected to a blowing pipe, the upper end of the blowing pipe is fixedly connected to a connector, the end of the air inlet pipe entering the interior of the cabinet is connected to the connector via a hose, and a plurality of air outlet structures are arranged at one end of the blowing pipe facing the interior of the cabinet.

[0006] As a further description of the above technical solution:

[0007] The filtering structure comprises a frame plate and a filter screen. The frame plate is fixedly connected to the rear wall of the forced cooling box, and the filter screen is fixedly connected to the inner wall of the frame plate.

[0008] As a further description of the above technical solution:

[0009] The forced cooling structure includes an insulation box, a nitrogen tank, a motor, a cam and a coil. The insulation box is fixedly connected to the lower inner wall of the forced cooling box and is close to the left wall. The nitrogen tank is fixedly connected to the inner wall of the insulation box by a clamp. A nozzle for spraying contents by pressing is arranged on the upper end of the nitrogen tank. The nozzle penetrates the upper wall of the insulation box and extends to the top of the insulation box. The motor is fixedly connected to the top of the insulation box and is located on the right side of the nozzle. The cam is fixedly connected to the end extended from the motor. The outer wall of the cam is slidably connected to the upper wall of the nozzle. The coil is fixedly connected to the lower inner wall of the forced cooling box and is located on the left side of the insulation box. The coil is a metal tube with both ends passed through. One of the two ends of the coil is aligned with the nozzle of the nitrogen tank nozzle.

[0010] As a further description of the above technical solution:

[0011] The air outlet structure includes multiple groups of blowing nozzles and duckbill valves. The multiple groups of blowing nozzles are fixedly connected to the side of the blowing pipe away from the cabinet door. The multiple groups of duckbill valves are respectively fixedly connected to the ends of the multiple groups of blowing nozzles away from the blowing pipe. The opening pressure of the duckbill valve is less than the wind force of the fan.

[0012] As a further description of the above technical solution:

[0013] One end of the connecting pipe extending into the interior of the forced cooling box is fixedly connected to an air suction pipe, and one end of the connecting pipe located inside the blower box is connected to the inlet end of the fan through an oil-water separator.

[0014] As a further description of the above technical solution:

[0015] The rear wall of the cabinet door is fixedly connected with a plurality of sets of fixing clips, and the blowing pipe is fixedly connected with the cabinet door through the plurality of sets of fixing clips.

[0016] The utility model has the following beneficial effects:

[0017] Compared with the prior art, the temperature regulating frequency conversion cabinet detects the internal temperature of the cabinet and the external environment temperature through a temperature sensor. When the external environment temperature is not high, convection blowing is performed through the fans in the two groups of heat dissipation boxes to take away the heat inside the cabinet, and external air is supplemented to enter the cabinet for heat exchange to adjust the temperature. When the external environment temperature is too high and the convection heat dissipation of the fan does not work, the cam is driven by the motor to rotate, thereby squeezing the nozzle of the nitrogen tank to spray liquid nitrogen spray toward the inside of the coil. The liquid nitrogen spray quickly cools the coil and cools the air inside the forced cooling box at the same time. The air in the forced cooling box is then sucked in by the fan through the blowing pipe and the blowing nozzle to squeeze the duckbill valve and blown into the cabinet for forced cooling, thereby achieving the purpose of rapid cooling. The temperature control speed is very fast, the structure is simple, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a temperature regulating frequency conversion cabinet proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the back structure of a cabinet door of a temperature regulating frequency conversion cabinet proposed by the utility model;

[0020] Figure 3 This is a side view of the connection structure of the blowing nozzle and duckbill valve of a temperature regulating frequency conversion cabinet proposed by the utility model;

[0021] Figure 4 This is a top cross-sectional schematic diagram of the internal structure of a forced cooling box of a temperature regulating frequency conversion cabinet proposed by the utility model;

[0022] Figure 5 This is a partial cross-sectional view of the internal structure of an insulation box of a temperature regulating frequency conversion cabinet proposed by the utility model;

[0023] Figure 6 The utility model provides a partial sectional view of the internal structure of a blower box of a temperature regulating frequency conversion cabinet.

[0024] Legend:

[0025] 1. Cabinet body; 2. Cabinet door; 3. Heat sink; 4. Strong cooling box; 5. Blower box; 6. Air inlet pipe; 7. Frame plate; 8. Fixing card; 9. Blowing pipe; 10. Connecting head; 11. Blowing nozzle; 12. Duckbill valve; 13. Filter; 14. Insulation box; 15. Clamp; 16. Nitrogen tank; 17. Motor; 18. Cam; 19. Coil; 20. Connecting pipe; 21. Suction pipe; 22. Partition; 23. Fan; 24. Oil-water separator. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figures 1 to 6 The utility model provides a temperature regulating frequency conversion cabinet: comprising a cabinet 1, a cabinet door 2, two groups of temperature sensors and two groups of heat dissipation boxes 3, the two groups of heat dissipation boxes 3 are respectively arranged on the left and right sides of the cabinet 1, a fan is arranged in the heat dissipation box 3, the cabinet door 2 is rotatably connected to the front wall of the cabinet 1, the two groups of temperature sensors are respectively arranged inside the cabinet 1 and outside the cabinet 1, and are respectively used to detect the temperature conditions inside and outside the cabinet 1. The market usually stipulates that the internal temperature of the frequency conversion cabinet works between minus ten degrees and forty degrees. In fact, it is more reasonable for each electrical component to work within the range of fifteen degrees to twenty-six degrees. When the external ambient temperature is not high, the fans in the two groups of heat dissipation boxes 3 can drive the air inside the cabinet 1 to be discharged outside the box through different blowing directions, and at the same time, room temperature air is sucked from the outside to reduce the internal temperature of the cabinet 1;

[0028] like Figure 1 , Figure 4 As shown, in order to filter dust from the air sucked in by the fan 23 from the rear of the forced cooling box 4, the top of the cabinet 1 and near the rear wall is fixedly connected with the forced cooling box 4, the rear wall of the forced cooling box 4 is provided with an opening, and a filtering structure for filtering is provided at the opening of the forced cooling box 4, the filtering structure includes a frame plate 7 and a filter screen 13, the frame plate 7 is fixedly connected to the rear wall of the forced cooling box 4, the filter screen 13 is fixedly connected to the inner wall of the frame plate 7, during forced cooling, the fan 23 sucks air from the forced cooling box 4, and synchronously, the forced cooling box 4 sucks in the outer wall air along the opening, and the dust is filtered out of the air through the filter screen 13 during the suction process, so as to prevent dust from entering and adhering to the outer wall of the coil 19, thereby reducing the heat exchange efficiency;

[0029] like Figure 1 , Figure 3 as well as Figure 4As shown, in order to achieve the purpose of forced refrigeration, a forced cooling structure for rapidly cooling the air in the box is provided inside the forced cooling box 4, and the forced cooling structure includes an insulation box 14, a nitrogen tank 16, a motor 17, a cam 18 and a coil 19. The insulation box 14 is fixedly connected to the lower inner wall of the forced cooling box 4 and close to the left wall. The nitrogen tank 16 is fixedly connected to the inner wall of the insulation box 14 through a clamp 15. A nozzle for spraying the contents by pressing is provided at the upper end of the nitrogen tank 16. The nozzle penetrates the upper wall of the insulation box 14 and extends to the top of the insulation box 14. The motor 17 is fixedly connected to the top of the insulation box 14 and is located on the right side of the nozzle. The cam 18 is fixedly connected to the end of the motor 17. The cam 18 is externally connected to the outer wall of the motor 17. The wall is slidably connected to the upper wall of the nozzle, the coil 19 is fixedly connected to the lower wall inside the strong cold box 4 and is located on the left side of the heat preservation box 14. The coil 19 is a metal tube with both ends connected. One end of the two ends of the coil 19 is aligned with the nozzle of the nitrogen tank 16 nozzle. When the external environment temperature is too high, it is difficult to reach the ideal temperature range by using the fan to blow air and cool down alone. At this time, it is necessary to start the motor 17, and the cam 18 is driven to rotate by the rotation of the motor 17. When the cam 18 rotates, its raised part will press the nozzle of the nitrogen tank 16, so that the nozzle sprays low-temperature liquid nitrogen toward one end of the coil 19, so that the coil 19 is quickly cooled, and then the heat exchange and cooling of the inside of the strong cold box 4 is carried out through the coil 19;

[0030] like Figure 1 , Figure 6As shown, in order to transport the cold air inside the forced cooling box 4 to the inside of the cabinet 1 for cooling, a blower box 5 is fixedly connected to the front wall of the forced cooling box 4, and a fan 23 is fixedly connected to the inside of the blower box 5 through a partition 22. The inlet end of the fan 23 is connected to the forced cooling box 4 through a connecting pipe 20, and the outlet end of the fan 23 is fixedly connected to an air inlet pipe 6. The end of the air inlet pipe 6 away from the fan 23 passes through the front wall of the blower box 5 and the upper wall of the cabinet 1 in sequence and extends to the inside of the cabinet 1. The rear wall of the cabinet door 2 is fixedly connected to a blowing pipe 9. The rear wall of the cabinet door 2 is fixedly connected to a plurality of fixing cards 8, and the blowing pipe 9 is fixedly connected to the cabinet door 2 through the plurality of fixing cards 8. The upper end of the blowing pipe 9 is fixedly connected to a connector 10, and the end of the air inlet pipe 6 entering the interior of the cabinet 1 is connected to the connector 10 through a hose. The end of the blowing pipe 9 facing the interior of the cabinet 1 is provided with a plurality of air outlet structures, and the air outlet structures include a plurality of air nozzles 11 and a duckbill valve 12. The plurality of air nozzles 11 are fixedly connected to the side of the blowing pipe 9 away from the cabinet door 2, and the plurality of duckbill valves 12 are respectively The plurality of blowing nozzles 11 are fixedly connected to one end away from the blowing pipe 9, the opening pressure of the duckbill valve 12 is less than the wind force of the fan 23, the end of the connecting pipe 20 extending into the interior of the strong cooling box 4 is fixedly connected with the suction pipe 21, and the end of the connecting pipe 20 located inside the blower box 5 is connected to the inlet end of the fan 23 through the oil-water separator 24. After the fan 23 is started, the cold air is sucked from the strong cooling box 4 through the connecting pipe 20 and the suction pipe 21, and is sent to the inside of the blowing pipe 9 through the air inlet pipe 6. When the fan 23 blows When a certain pressure is formed inside the blowing pipe 9, the cold air squeezes open the duckbill valve 12 on the blowing nozzle 11 and blows toward the various electrical components installed on the inner rear wall of the cabinet 1. The forced cooling effect brought by the liquid nitrogen causes the interior of the cabinet 1 to cool down rapidly. By controlling the air volume of the fan 23, the cooling speed can be improved so that the interior of the cabinet 1 can be continuously maintained within the ideal temperature range. The oil-water separator 24 can remove water from the cold air in the forced cooling box 4 to avoid excessive humidity inside the cabinet 1.

[0031] Working principle: When the external environment temperature is not high, the air inside the cabinet 1 can be discharged outside the box through the different blowing directions of the fans in the two sets of heat dissipation boxes 3, and at the same time, room temperature air can be sucked in from the outside to reduce the temperature inside the cabinet 1. When the external environment temperature is too high, it is difficult to reach the ideal temperature range by using the fan alone to blow air for cooling. At this time, it is necessary to start the motor 17, and the rotation of the motor 17 drives the cam 18 to rotate. When the cam 18 rotates, its raised part will press the nozzle of the nitrogen tank 16, so that the nozzle sprays low-temperature liquid nitrogen toward one end of the coil 19, so that the coil 19 is quickly cooled, and then the coil 19 is used to exchange heat and cool the inside of the forced cooling box 4. After the fan 23 is started, cold air is sucked from the forced cooling box 4 through the connecting pipe 20 and the suction pipe 21, and is sent to the air inlet pipe 6. Inside the blowing pipe 9, when the fan 23 blows air and forms a certain pressure inside the blowing pipe 9, the cold air squeezes open the duckbill valve 12 on the blowing nozzle 11 and blows toward the various electrical components installed on the inner rear wall of the cabinet 1. The forced cooling effect brought by the liquid nitrogen causes the inside of the cabinet 1 to cool down rapidly. By controlling the air volume of the fan 23, the cooling speed can be better, so that the inside of the cabinet 1 can be continuously maintained within the ideal temperature range. The oil-water separator 24 can remove water from the cold air in the forced cooling box 4 to avoid excessive humidity inside the cabinet 1. During forced cooling, the fan 23 sucks air from the forced cooling box 4. Simultaneously, the forced cooling box 4 sucks in the outer wall air along the opening. During the inhalation process, the air is filtered for dust through the filter 13 to prevent dust from entering and adhering to the outer wall of the coil 19, resulting in reduced heat exchange efficiency.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 temperature regulating frequency conversion cabinet, characterized in that: The invention comprises a cabinet (1), a cabinet door (2), two groups of temperature sensors and two groups of heat dissipation boxes (3), wherein the two groups of heat dissipation boxes (3) are respectively arranged on the left and right sides of the cabinet (1), wherein a fan is arranged in the heat dissipation box (3), wherein the cabinet door (2) is rotatably connected to the front wall of the cabinet (1), wherein a strong cooling box (4) is fixedly connected to the top of the cabinet (1) and close to the rear wall, wherein the rear wall of the strong cooling box (4) is provided with an opening, wherein a filtering structure for filtering is arranged at the opening of the strong cooling box (4), wherein a strong cooling structure for rapidly cooling the air in the box is arranged inside the strong cooling box (4), wherein a blower box (5) is fixedly connected to the front wall of the strong cooling box (4), wherein the inside of the blower box (5) is provided with a partition ( The cabinet door (22) is fixedly connected to a fan (23), the inlet end of the fan (23) is connected to the forced cooling box (4) through a connecting pipe (20), the outlet end of the fan (23) is fixedly connected to an air inlet pipe (6), the end of the air inlet pipe (6) away from the fan (23) passes through the front wall of the blower box (5) and the upper wall of the cabinet (1) in sequence and extends into the interior of the cabinet (1), the rear wall of the cabinet door (2) is fixedly connected to a blow pipe (9), the upper end of the blow pipe (9) is fixedly connected to a connector (10), the end of the air inlet pipe (6) entering the interior of the cabinet (1) is connected to the connector (10) through a hose, and the end of the blow pipe (9) facing the interior of the cabinet (1) is provided with a plurality of air outlet structures.

2. A temperature regulating frequency conversion cabinet according to claim 1, characterized in that: The filtering structure comprises a frame plate (7) and a filter screen (13); the frame plate (7) is fixedly connected to the rear wall of the forced cooling box (4); and the filter screen (13) is fixedly connected to the inner wall of the frame plate (7).

3. A temperature regulating frequency conversion cabinet according to claim 1, characterized in that: The forced cooling structure comprises an insulation box (14), a nitrogen tank (16), a motor (17), a cam (18) and a coil (19); the insulation box (14) is fixedly connected to the lower inner wall of the forced cooling box (4) and close to the left wall; the nitrogen tank (16) is fixedly connected to the inner wall of the insulation box (14) via a clamp (15); a nozzle for spraying out the contents by pressing is provided at the upper end of the nitrogen tank (16); the nozzle penetrates the upper wall of the insulation box (14) and extends to the insulation box (14). The motor (17) is fixedly connected to the top of the heat preservation box (14) and is located on the right side of the nozzle. The cam (18) is fixedly connected to the end of the motor (17) extending therefrom. The outer wall of the cam (18) is slidably connected to the upper wall of the nozzle. The coil (19) is fixedly connected to the lower wall of the inner side of the strong cooling box (4) and is located on the left side of the heat preservation box (14). The coil (19) is a metal tube with both ends connected. One of the two ends of the coil (19) is aligned with the nozzle of the nitrogen tank (16) nozzle on the left and right.

4. A temperature regulating frequency conversion cabinet according to claim 1, characterized in that: The air outlet structure comprises a plurality of groups of blowing nozzles (11) and duckbill valves (12); the plurality of groups of blowing nozzles (11) are fixedly connected to a side of the blowing pipe (9) away from the cabinet door (2); the plurality of groups of duckbill valves (12) are respectively fixedly connected to an end of the plurality of groups of blowing nozzles (11) away from the blowing pipe (9); and the opening pressure of the duckbill valves (12) is less than the wind force of the fan (23).

5. The temperature regulating frequency conversion cabinet according to claim 1, characterized in that: One end of the connecting pipe (20) extending into the interior of the forced cooling box (4) is fixedly connected to an air suction pipe (21), and one end of the connecting pipe (20) located inside the blower box (5) is connected to an inlet end of the fan (23) via an oil-water separator (24).

6. The temperature regulating frequency conversion cabinet according to claim 1, characterized in that: The rear wall of the cabinet door (2) is fixedly connected to a plurality of sets of fixing clips (8), and the blowing pipe (9) is fixedly connected to the cabinet door (2) via the plurality of sets of fixing clips (8).

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