Medium-voltage frequency converter auxiliary cabinet energy-saving air cooling system
By designing the energy-saving air cooling system of the auxiliary cabinet of the medium voltage inverter, it can benefit the cooling of the outdoor air and air conditioner condensate or ice, and solve the high temperature problem of the auxiliary cabinet of the medium voltage inverter, achieving the effect of effectively reducing cooling and extending the service life.
Patent Information
- Application Number
- CN202411383328.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-02-14
AI Technical Summary
The prior art is difficult to effectively reduce the high temperature problem of the auxiliary cabinet of medium voltage inverter, resulting in frequent module failures and shortening the service life of electronic components.
Design an energy-saving air cooling system for auxiliary cabinets in medium voltage inverters, including outdoor heat exchange boxes and auxiliary cabinet heat exchange boxes, which can help users to dissipate heat from the refrigerant, and connect condensate from the air conditioner in summer or put ice cubes to improve the Cooling efficiency.
It realizes effective cooling of the auxiliary cabinet of the medium voltage inverter, extends the service life of electronic components, and improves the energy-saving and environmentally friendly performance of the cooling system.
Smart Images
Figure CN119451035A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of inverter auxiliary cabinet cooling systems, in particular to an energy-saving air cooling system for a medium-voltage inverter auxiliary cabinet. Background Art
[0002] The workshop is full of people and machines, and the temperature inside the workshop is usually high. Even if it is equipped with air conditioning, it cannot effectively solve the local high temperature situation in the electrical cabinet. For example, the SM150 medium-voltage inverter auxiliary cabinet in the second wide and thick plate workshop of Jiangsu Shagang Group did not have a cooling device when it was designed and created. The temperature inside the cabinet was detected by a thermal imager to be above 55°C. In the summer season, the temperature inside the cabinet is as high as 70°C. Long-term high temperature will cause module failures in the inverter cabinet, frequent drive system failures, and greatly shorten the service life of electronic components. In the existing technology, fans are often simply installed on the electrical cabinet, and the air blown in is also at a higher temperature in the workshop, which is also a drop in the bucket for heat dissipation in the electrical cabinet.
[0003] In a workshop with a particularly high temperature environment in the summer, if the electrical cabinet needs to be cooled down quickly, the only way is to place large ice cubes next to the cabinet and use a large fan to blow air towards the cabinet. In fact, the amount of air that can be blown into the cabinet is limited, and most of the cold energy of the ice cubes is dissipated to the outside, which is not very targeted and causes waste.
[0004] According to statistics, a 5P air conditioner can produce about 3 kilograms of condensed water per hour, and the temperature of the condensed water is about 20°. In the past, the condensed water of the air conditioner was directly discharged to the outdoors. If the coldness of the condensed water can be used to cool the electrical cabinet, it is also a very energy-saving and environmentally friendly measure. Summary of the invention
[0005] The purpose of the present invention is to solve the problems existing in the prior art and to provide an energy-saving air cooling system for a medium-voltage inverter auxiliary cabinet.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An energy-saving air cooling system for a medium-voltage inverter auxiliary cabinet comprises an outdoor heat exchange box and an auxiliary cabinet heat exchange box, wherein the outdoor heat exchange box is installed on the outer wall of a house where the medium-voltage inverter auxiliary cabinet is placed, and the auxiliary cabinet heat exchange box is installed on the side of the medium-voltage inverter auxiliary cabinet; a hot water pipe and a cold water pipe are arranged between the outdoor heat exchange box and the auxiliary cabinet heat exchange box, wherein the cold water pipe is for water inlet and the hot water pipe is for water outlet; The outdoor heat exchange box includes a flat box body; the box body is fixed parallel to the wall, has air outlets on both sides, has a diverter on the top of the box body, the hot water pipe runs through the outer wall of the house and is connected to the water inlet end of the diverter, and a flow valve is provided on the hot water pipe; the bottom of the box body is a water tank, the cold water pipe runs through the outer wall of the house and is connected to the bottom of the water tank, and a water pump is provided on the cold water pipe; The auxiliary cabinet heat exchanger box is the same height as the medium-voltage inverter auxiliary cabinet, with an air inlet on the top and an air outlet on the lower side. An opening connected to the air outlet is also provided on the lower side of the medium-voltage inverter auxiliary cabinet. A heat exchange pipe is provided on the inner wall of the auxiliary cabinet heat exchanger box. The water inlet of the heat exchange pipe is connected to the cold water pipe, and the water outlet is connected to the hot water pipe. Heat exchange plates are installed on the heat exchange pipe, and the heat exchange plates are arranged longitudinally. A fan is installed at the air inlet of the auxiliary cabinet heat exchanger box.
[0007] As a further preferred solution, there is a gap between the box body and the wall, the back of the box body is made of heat-conducting material, and the back is also provided with transversely arranged fins.
[0008] As a further preferred solution, the diverter includes a main pipe connected to the hot water pipe, and a plurality of diverter pipes, and the diverter pipes spray water toward the back of the box body.
[0009] As a further preferred solution, the air vents on both sides of the box body are arranged obliquely upward, and the air vents are located above the water tank.
[0010] As a further preferred solution, an air-conditioning condensate inlet is provided on the water tank, and the air-conditioning condensate inlet is connected to the condensate pipe leading out of the air-conditioner indoor unit in the house. One energy-saving air cooling system corresponds to one air-conditioner; the main pipeline of the diverter is also provided with a drain pipe leading out of the outdoor heat exchange box, and the drain pipe has a flow regulator.
[0011] As a further preferred solution, the heat exchange pipe includes several segmented pipes connected in series, the segmented pipes are of a wave structure, and the several segmented pipes are arranged horizontally and installed on the inner wall of the auxiliary cabinet heat exchange box in sequence from top to bottom. Heat exchange plates are installed on the longitudinal part of the segmented pipes.
[0012] As a further preferred solution, an air inlet is provided with an air induced baffle, which is an arc-shaped plate that bends in a direction away from the auxiliary cabinet of the medium-voltage inverter.
[0013] As a further preferred solution, the bottom of the auxiliary cabinet heat exchange box is provided with a condensed water receiving tray.
[0014] As a further preferred solution, the fins, heat exchange plates, heat exchange pipes, and the back of the box body are all made of copper.
[0015] As a further preferred solution, an ice cube insertion port is provided on the box body.
[0016] The present invention is low-cost, easy to install and has wide applicability. Compared with the traditional heat dissipation method of the electrical cabinet, it uses outdoor wind to dissipate the heat of the refrigerant, and the refrigerant directly enters the cooling system and circulates to cool the electrical cabinet. In summer, the condensed water of the nearby air conditioner can also be connected to participate in the cooling of the refrigerant, directly utilizing the cold capacity of the air conditioner condensed water, or directly putting ice cubes in the cooling system to achieve rapid cooling, greatly improving the utilization rate of the ice cubes. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of an outdoor heat exchange box; Figure 3 This is a schematic diagram of the internal structure of the auxiliary cabinet heat exchange box; Figure 4 It is a schematic diagram of the structure of the heat exchange pipeline. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0019] The energy-saving wind cooling system of the auxiliary cabinet of a medium-voltage inverter of the present invention comprises an outdoor heat exchange box 1 and an auxiliary cabinet heat exchange box 2. The outdoor heat exchange box 1 is installed on the outer wall of the house where the auxiliary cabinet of the medium-voltage inverter is placed, and the auxiliary cabinet heat exchange box 2 is installed on the side of the auxiliary cabinet of the medium-voltage inverter. The best placement position of the auxiliary cabinet of the medium-voltage inverter is on the inner side of the wall, close to the wall. In this way, the length of the hot water pipe 3 and the cold water pipe 4 between the outdoor heat exchange box 1 and the auxiliary cabinet heat exchange box 2 can be shortened to reduce the cost. Among them, the cold water pipe 4 is the water inlet and the hot water pipe 3 is the water outlet. The main framework of the technical scheme is to bring the heat in the auxiliary cabinet heat exchange box 2 out of the outdoor heat exchange box 1 through the medium for cooling and heat exchange, and then re-enter the auxiliary cabinet heat exchange box 2, and then bring the cold in the auxiliary cabinet heat exchange box 2 into the medium-voltage inverter auxiliary cabinet through air blasting. The heat exchange medium of the present invention is water, which flows from top to bottom in the outdoor heat exchange box 1 and circulates from bottom to top in the auxiliary cabinet heat exchange box 2. Embodiment 1
[0020] The outdoor heat exchange box 1 includes a flat box body 11, which is generally 5CM-10CM thick, 50CM-100CM wide, and 100CM-200CM high; Among them, the small thickness does not affect the road outside the wall and is easy to install; The width affects the diversion width of the diverter 13. Whether the hot water can be diverted more is helpful for heat dissipation and cooling. When there is no wind or little wind, the larger the diversion width, the better the basic heat dissipation effect; The height directly affects whether the moisture can be in contact with the air more during the downstream process to exchange heat and cool down. The greater the wind entering the box body 11, the better the heat exchange effect and the better the upper limit of the heat dissipation effect.
[0021] The box body 11 is fixed parallel to the wall, and has air vents 12 on both sides. A diverter 13 is provided on the top of the box body 11. The hot water pipe 3 runs through the water inlet end of the outer wall of the house connected to the diverter 13. The hot water pipe 3 is provided with a flow valve 14. Since the box body 11 is parallel to the wall, the outdoor wind at this position flows along the wall. Therefore, the air vents 12 on both sides are parallel to the wind direction, which is convenient for the wind to directly enter the box body 11 and cool the water drained down; the air vents 12 on both sides of the box body 11 are set obliquely upward, and the water splashed to the air vents 12 can also flow back into the box body 11.
[0022] Furthermore, the diverter 13 includes a main pipe connected to the hot water pipe 3, and a plurality of diverter pipes, which spray water toward the back of the box body 11, and the water flows down along the back to prevent water from splashing out of the air outlet 12. There is a gap between the box body 11 and the wall, and the back of the box body 11 can be designed as a heat-conducting material, such as a copper plate. The back of the outside of the box body 11 is also provided with transversely arranged fins 17, so that heat can be transferred to the back of the box body 11 and the fins 17 outside the box body 11. Due to the existence of the gap, the wind along the wall can also directly blow away the heat on the fins 17 without hindrance, greatly improving the heat exchange efficiency.
[0023] The bottom of the box body 11 is a water tank 15. The cold water pipe 4 runs through the outer wall of the house and is connected to the bottom of the water tank 15. The cold water pipe 4 is provided with a water pump 16. Water flows down the back of the box body 11 to the water tank 15 for temporary storage. The air vent 12 is located above the water tank 15. Excess water overflows from the lowest air vent 12. A filter is provided at the connection between the water tank 15 and the cold water pipe 4.
[0024] The auxiliary cabinet heat exchange box 2 has the same height as the medium-voltage inverter auxiliary cabinet, has an air inlet 21 on the upper part, and an air outlet 22 on the lower side. An opening connected to the air outlet 22 is also provided on the lower side of the medium-voltage inverter auxiliary cabinet. A heat exchange pipe 23 is provided on the inner wall of the auxiliary cabinet heat exchange box 2. The water inlet of the heat exchange pipe 23 is connected to the cold water pipe 4, and the water outlet is connected to the hot water pipe 3. A heat exchange plate 24 is installed on the heat exchange pipe 23, and the heat exchange plate 24 is arranged longitudinally. A fan 25 is installed at the air inlet 21 of the auxiliary cabinet heat exchange box 2. The fan 25 blows air into the air outlet 22 on the lower side and enters the medium-voltage inverter auxiliary cabinet through the opening on the lower side of the medium-voltage inverter auxiliary cabinet. A dehumidification breathable membrane can be provided at the opening on the lower side of the medium-voltage inverter auxiliary cabinet.
[0025] The heat exchange pipe 23 includes a plurality of segmented pipes connected in series. The segmented pipes are of a wave structure. The segmented pipes are arranged horizontally and installed on the inner wall of the auxiliary cabinet heat exchange box 2 in sequence. Heat exchange plates 24 are installed on the longitudinal parts of the segmented pipes.
[0026] The air inlet 21 is provided with an air induced baffle 26 which is an arc-shaped plate that bends in a direction away from the medium-voltage inverter auxiliary cabinet to prevent the air inlet 21 from sucking in hot air exhausted from above the medium-voltage inverter auxiliary cabinet again.
[0027] The bottom of the auxiliary cabinet heat exchange box 2 is provided with a condensed water receiving tray 27, which can be collected when the heat exchange pipe 23 generates condensed water due to excessive cooling capacity.
[0028] The fins 17, the heat exchange sheets 24, the heat exchange pipes 23, and the back surface of the box body 11 are all made of copper.
[0029] The above embodiment 1 can meet the use requirements in normal weather temperatures. Embodiment 2
[0030] In hot summer weather, the temperature of outdoor natural wind is also relatively high. The heat dissipation effect of high-temperature natural wind is poor. Therefore, the condensed water of the nearby air conditioner can be used. The water tank 15 is provided with an air conditioner condensed water inlet 18. The air conditioner condensed water inlet 18 is connected to the condensed water pipe led out of the air conditioner indoor unit in the house. Generally, one energy-saving wind cooling system corresponds to one air conditioner. The condensed water of about 20° enters the box body 11 and mixes with the internal water to reduce the temperature. After adding the air-conditioning condensate, there is excess water in the box body 11. If the water in the water tank 15 is directly discharged, the utilization rate of the condensate will be reduced. Therefore, a drain pipe 19 leading out of the outdoor heat exchange box 1 is also provided on the main pipeline of the diverter 13. The drain pipe 19 has a flow regulator to directly discharge the hot water in the hot water pipe 3. Generally, the drainage volume of the drain pipe 19 is less than the water intake of the air-conditioning condensate. If conditions permit, a tap water pipe can be connected to the water tank 15 to replenish tap water at regular intervals, or in the absence of air-conditioning condensate, the hot water in the hot water pipe 3 can be discharged at regular intervals to replenish low-temperature tap water.
[0031] If there is no air conditioning condensate water available nearby and no tap water available, in hot weather, ice cubes can be directly put into the ice cube inlet 3 opened on the box body 11. Compared with the traditional method of using large ice cubes, this solution uses a small amount of ice cubes and no cold energy is dissipated to the outside, so the cold energy utilization rate of the ice cubes is high.
[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A medium voltage inverter auxiliary cabinet energy-saving air cooling system, characterized in that: The invention comprises an outdoor heat exchange box (1) and an auxiliary cabinet heat exchange box (2), wherein the outdoor heat exchange box (1) is installed on the outer wall of a house where a medium-voltage inverter auxiliary cabinet is placed, and the auxiliary cabinet heat exchange box (2) is installed on the side of the medium-voltage inverter auxiliary cabinet; a hot water pipe (3) and a cold water pipe (4) are provided between the outdoor heat exchange box (1) and the auxiliary cabinet heat exchange box (2), wherein the cold water pipe (4) is for water inlet and the hot water pipe (3) is for water outlet; The outdoor heat exchange box (1) comprises a flat box body (11); the box body (11) is fixed parallel to the wall surface and has air outlets (12) on both sides; the top of the box body (11) has a diverter (13); the hot water pipe (3) passes through the outer wall of the house and is connected to the water inlet end of the diverter (13); the hot water pipe (3) has a flow valve (14); the bottom of the box body (11) is a water tank (15); the cold water pipe (4) passes through the outer wall of the house and is connected to the bottom of the water tank (15); the cold water pipe (4) has a water pump (16); The auxiliary cabinet heat exchange box (2) has the same height as the medium-voltage inverter auxiliary cabinet, has an air inlet (21) at the top, and an air outlet (22) at the bottom side. The lower side of the medium-voltage inverter auxiliary cabinet is also provided with an opening connected to the air outlet (22). A heat exchange pipe (23) is provided on the inner wall of the auxiliary cabinet heat exchange box (2). The water inlet of the heat exchange pipe (23) is connected to the cold water pipe (4), and the water outlet is connected to the hot water pipe (3). A heat exchange plate (24) is installed on the heat exchange pipe (23). The heat exchange plate (24) is arranged longitudinally. A fan (25) is installed at the air inlet (21) of the auxiliary cabinet heat exchange box (2).
2. According to claim 1, a medium voltage inverter auxiliary cabinet energy-saving air cooling system is characterized in that: There is a gap between the box body (11) and the wall surface; the back side of the box body (11) is made of heat-conducting material, and the back side is also provided with transversely arranged fins (17).
3. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 2 is characterized in that: The flow diverter (13) comprises a main pipe connected to the hot water pipe (3), and a plurality of diverter pipes, the diverter pipes spraying water towards the back of the box body (11).
4. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 3 is characterized in that: The air vents (12) on both sides of the box body (11) are arranged obliquely upward, and the air vents (12) are located above the water tank (15).
5. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 4 is characterized in that: The water storage tank (15) is provided with an air conditioning condensate inlet (18), which is connected to a condensate pipe leading out of an air conditioner indoor unit in the house, and one energy-saving air cooling system corresponds to one air conditioner; the main pipe of the diverter (13) is also provided with a drainage pipe (19) leading out of the outdoor heat exchange box (1), and a flow regulator is provided on the drainage pipe (19).
6. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 1 is characterized in that: The heat exchange pipe (23) comprises a plurality of segmented pipes connected in series, the segmented pipes being of a wave structure, the plurality of segmented pipes being arranged horizontally and being installed in sequence up and down on the inner wall of the auxiliary cabinet heat exchange box (2), and heat exchange fins (24) being installed on the longitudinal portions of the segmented pipes.
7. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 6 is characterized in that: The air inlet (21) is provided with an air induction baffle (26), which is an arc-shaped plate that bends in a direction away from the auxiliary cabinet of the medium-voltage frequency converter.
8. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 7 is characterized in that: The auxiliary cabinet heat exchange box (2) has a condensed water receiving tray (27) at the bottom.
9. A medium voltage inverter auxiliary cabinet energy-saving air cooling system according to claim 5 or 7, characterized in that: The fins (17), the heat exchange plates (24), the heat exchange pipes (23), and the back surface of the box body (11) are all made of copper.
10. The energy-saving air cooling system for auxiliary cabinet of medium voltage inverter according to claim 1, characterized in that: The box body (11) is provided with an ice cube insertion opening (3).