Electromagnetic valve box with anti-freezing effect

Abstract

The utility model discloses an electromagnetic valve box with an anti-freezing effect, which belongs to the technical field of electromagnetic valve boxes and comprises a cabinet body and a cabinet door hinged on the front side surface of the cabinet body, an air inlet is arranged at the bottom of the left side surface of the cabinet body, and an accommodating frame of an electromagnetic valve is fixedly arranged in the cabinet body. When the cabinet is used in cold weather, the cover plate is moved backwards, so that a sealed space is formed between the cover plate and the accommodating frame, the exhaust device exhausts hot air in the sealed space and discharges the hot air into the annular channel, and the hot air circulates in the annular channel for a circle and then is discharged into the cabinet body. The air in the cabinet body enters the internal space of the accommodating frame through the communicating pipe, so that the internal circulation of the air in the cabinet body is formed, and the heat dissipating capacity is reduced; when the cabinet is used in a normal room temperature environment, the cover plate is moved forwards, so that the cover plate opens the opening of the accommodating frame, the internal space of the accommodating frame is communicated with the internal space of the cabinet body, and a normal heat dissipation function is realized; the purpose that the electromagnetic valve box adapts to work in various weathers is achieved.

Description

Technical Field

[0001] This utility model relates to an electromagnetic valve box, and more particularly to an electromagnetic valve box with antifreeze effect. Background Technology

[0002] Solenoid valve boxes are key pieces of equipment in industrial automation, controlling the operation of solenoid valves. They consist of a power module, control circuitry, a PLC or controller, and a human-machine interface. During operation, they receive external signals, and the control circuitry changes the energization state of the solenoid valve coil, adjusting the valve core position to achieve fluid (gas) on / off control and flow control. In industrial automated production lines, they can assist pneumatic and hydraulic equipment; in HVAC, water supply and drainage systems, they can regulate air valves, water valves, and water pumps. With their precise control performance, they empower the automation process in various industries, ensuring stable system operation.

[0003] Solenoid valve boxes are used in various fields. In oil extraction, storage, chemical, pharmaceutical, textile, printing and dyeing, military, and military facilities, which are often explosive hazardous environments, solenoid valve boxes need explosion-proof capabilities. In extremely cold regions, solenoid valve boxes require antifreeze and insulation functions. Some existing solenoid valve boxes achieve insulation through a sealed environment; however, a sealed environment can easily cause an imbalance between the internal pressure and the external pressure, putting pressure on the valve box itself and even leading to damage. Thicker inner walls are needed, increasing manufacturing costs. Some solenoid valve boxes are made with heat-insulating materials, which also increases costs. Furthermore, both methods make it difficult to switch from low-temperature operating mode to room-temperature operating mode when working at normal room temperature, thus limiting their applicability to various environments. Utility Model Content

[0004] The purpose of this invention is to provide a solenoid valve box with antifreeze effect, which can effectively maintain the temperature inside the solenoid valve box, reduce the rate of temperature loss inside the solenoid valve box, and solve the problem that it is not easy to switch between the normal room temperature environment working mode and the low temperature environment working mode of the solenoid valve box in the prior art.

[0005] This utility model adopts the following technical solution: an electromagnetic valve box with antifreeze effect, including a cabinet and a cabinet door hinged to the front side of the cabinet. An air inlet is provided at the bottom of the left side of the cabinet. A housing frame for the electromagnetic valve is fixedly installed inside the cabinet. A cover plate is slidably installed inside the cabinet door along the front-back direction. Several through slots corresponding to compressed air pipes are opened on the front side of the cover plate. A notch is opened on the front side of the cover plate, which is connected to each through slot. A cover body is fixedly installed on the cover plate to seal the front side of the notch. A box body with a left-side opening is fixedly installed on the inner side wall of the cabinet. An exhaust device is provided on the cabinet. The input pipe of the exhaust device is connected to the internal space of the box body. A three-way valve is installed on the output pipe of the exhaust device. The first output end of the three-way valve is connected to the outside, and the second output end of the three-way valve is connected to the air duct opened inside the housing frame. A connecting pipe is fixedly installed on the side wall of the housing frame. The inner end of the connecting pipe is connected to the internal space of the housing frame, and the outer end of the connecting pipe is connected to the inside of the cabinet body.

[0006] Furthermore, the air duct is an annular channel opened within the housing frame, and the connecting pipe divides the annular channel into discontinuous channels. The second output end of the three-way valve is located below the connecting pipe and communicates with the annular channel. An air outlet communicating with the annular channel is opened on the outer surface of the housing frame located above the connecting pipe.

[0007] Furthermore, the exhaust device includes blades rotatably connected to a through hole inside the cabinet. Valve seats are fixedly installed on both sides of the inner wall of the through hole. The rotation shafts of the blades are rotatably connected to the valve seats. A motor is fixedly installed on the outer side of the inner valve seat. The output shaft of the motor is fixedly installed to the rotation shaft of the blades. The top end of the input pipe is fixedly installed to the inner valve seat. The bottom end of the input pipe is fixedly installed to the upper surface of the cabinet, and the input pipe communicates with the internal space of the cabinet. The inner end of the output pipe is fixedly installed to the outer valve seat.

[0008] Furthermore, the first output end of the three-way valve is a first pipeline fixedly installed with the three-way valve, and the outer end of the first pipeline is connected to the outside. The second output end of the three-way valve is a second pipeline fixedly installed with the three-way valve, and the other end of the second pipeline is fixedly installed with the receiving frame and connected to the annular channel.

[0009] Furthermore, a drive rod is fixedly installed at the top of the valve stem of the three-way valve, and a limit block is fixedly installed on the upper end face of the three-way valve.

[0010] Furthermore, the cabinet door has a sliding hole, and the cover plate is slidably disposed in the sliding hole in the front-to-back direction.

[0011] Furthermore, the outer side of the cover plate is provided with a sliding groove along the front-back direction, and a frame is fixedly installed around the sliding hole on the rear side of the cabinet door. A slider is fixedly installed on the inner side wall of the frame at the position corresponding to the sliding groove, and the cover plate is slidably connected to the frame through the slider and the sliding groove.

[0012] Furthermore, the accommodating frame is fixedly provided with partitions along its inner edge, which divide the accommodating frame into two spaces, left and right, and the two spaces are connected.

[0013] Furthermore, the partition is provided with a number of connecting holes evenly distributed throughout; the function of the connecting holes is to connect the left and right spaces of the accommodating frame.

[0014] Furthermore, a handle is fixedly provided on the front side of the cover plate.

[0015] I. This utility model, by setting a cover plate and a housing frame, and opening an annular channel within the housing frame, allows the device to be used in extremely cold weather. When the cover plate is moved backward, a sealed space is formed between the cover plate and the housing frame. A ventilation device extracts hot air from this sealed space and discharges it into the annular channel, allowing the hot air to circulate once within the annular channel before being discharged into the cabinet. Air inside the cabinet enters the internal space of the housing frame through a connecting pipe, forming an internal air circulation within the cabinet and reducing heat dissipation. When used in a normal room temperature environment, the cover plate is moved forward, opening the housing frame and connecting the internal space of the housing frame with the internal space of the cabinet, achieving normal heat dissipation. This allows the electromagnetic valve box to adapt to various weather conditions.

[0016] II. By setting up a connecting pipe and a three-way valve, when this utility model is in use, the hot air in the accommodating rack enters the cover, input pipe, exhaust device, output pipe, three-way valve, second output end, annular channel and air outlet in sequence through the through groove on the cover plate. The hot air coming out of the air outlet enters the internal space of the cabinet. As the air in the accommodating rack is discharged, the internal space of the accommodating rack forms a negative pressure. The air in the cabinet enters the internal space of the accommodating rack through the connecting pipe, realizing the purpose of forming an internal air circulation between the internal space of the accommodating rack and the cabinet. The air in the cabinet forms natural ventilation with the outside through the air inlet, which effectively reduces the temperature loss rate around the solenoid valve and achieves the effect of heat preservation and antifreeze. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model (working environment mode in cold weather);

[0018] Figure 2 This is a three-dimensional structural diagram of the cabinet door of this utility model (normal room temperature working environment mode);

[0019] Figure 3 This is a three-dimensional structural diagram of the three-way valve in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the cabinet door in the open state of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the cabinet in this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the partition in this utility model;

[0023] Figure 7 In this utility model Figure 6 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 8 This is a three-dimensional structural diagram of the second pipeline in this utility model;

[0025] Figure 9 This is a three-dimensional structural diagram of the cover plate in the present invention after it has moved forward and separated from the receiving frame;

[0026] Figure 10 This is a three-dimensional structural diagram of the cover plate moving backward to fit against the receiving frame in this utility model.

[0027] Figure 11 This is a three-dimensional structural diagram of the connecting pipe in this utility model;

[0028] Figure 12 This is a three-dimensional structural diagram of the cover plate in this utility model;

[0029] Figure 13 This is a three-dimensional structural diagram of the cover and the cover plate in the separated state of this utility model;

[0030] Figure 14 This is a three-dimensional structural diagram of the cover plate and the cover body in the fixed state of this utility model;

[0031] Figure 15 This is a three-dimensional structural diagram of the box body in this utility model;

[0032] Figure 16 This is a three-dimensional structural diagram of the accommodating frame in this utility model;

[0033] Figure 17 This is a three-dimensional structural diagram of the rear side of the cover plate in this utility model;

[0034] Figure 18 In this utility model Figure 17 Enlarged schematic diagram of the structure at point B in the diagram;

[0035] Figure 19 This is a schematic diagram of the internal three-dimensional structure of the accommodating frame in this utility model.

[0036] In the diagram, 1. Cabinet body; 2. Cabinet door; 3. Air inlet; 4. Solenoid valve; 5. Shelf; 6. Compressed air pipe; 7. Cover plate; 8. Through groove; 9. Notch; 10. Cover; 11. Box body; 12. Input pipe; 13. Output pipe; 14. Three-way valve; 15. Connecting pipe; 16. Annular channel; 17. Air outlet; 18. Through hole; 19. Blade; 20. Valve seat; 21. First pipeline; 22. Second pipeline; 23. Drive rod; 24. Limit block; 25. Sliding hole; 26. Sliding groove; 27. Frame; 28. Sliding block; 29. ​​Partition; 30. Handle. Detailed Implementation

[0037] Please see Figure 1-19 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0038] The solenoid valve box with antifreeze effect described in this utility model includes a cabinet 1 and a cabinet door 2 hinged to the front side of the cabinet 1. An air inlet 3 is provided at the bottom of the left side of the cabinet 1. A housing frame 5 for solenoid valves 4 is fixedly installed inside the cabinet 1. The solenoid valves 4 are installed in the housing frame 5, and each solenoid valve 4 is equipped with a compressed air pipe 6. A cover plate 7 is slidably installed inside the cabinet door 2 in the front-back direction. When the cover plate 7 moves backward, it seals the opening on the front side of the housing frame 5, thus forming a sealed space inside the housing frame 5. When the cover plate 7 slides forward, it opens the opening of the housing frame 5, allowing the interior of the housing frame 5 to... The space is connected to the interior space of the cabinet 1, forming a large air circulation space. The front side of the cover 7 has several through slots 8 corresponding to the compressed air pipes 6. When the cover 7 moves backward to seal the front opening of the housing 5, the compressed air pipes 6 of the solenoid valve 4 all enter the corresponding through slots 8. The front side of the cover 7 has notches 9 that communicate with each through slot 8. A cover 10 is fixedly installed on the cover 7 to seal the front of the notches 9. When the cover 7 moves backward to seal the front opening of the housing 5, the compressed air pipes 6 of the solenoid valve 4 are all located inside the cover 10. Furthermore, the internal space of the cover 10 is connected to the internal space of the storage rack 5; a box 11 with a left-side opening is fixedly installed on the inner side wall of the cabinet 1, and the compressed air pipe 6 of the solenoid valve 4 extends to the right through the box 11 and the cabinet 1 to the outside of the cabinet 1 and connect to the air source; an exhaust device is installed on the cabinet 1, and the input pipe 12 of the exhaust device is connected to the internal space of the box 11; a three-way valve 14 is installed on the output pipe 13 of the exhaust device, the first output end of the three-way valve 14 is connected to the outside, and the second output end of the three-way valve 14 is connected to the air duct opened inside the storage rack 5; when the cover 7 slides forward... The opening of the storage rack 5 is opened, so that the internal space of the storage rack 5 is connected to the internal space of the cabinet 1. At this time, the opening on the left side of the box 11 is connected to the internal space of the cabinet 1. When the cover plate 7 moves backward to seal the opening on the front side of the storage rack 5, a sealed space is formed inside the storage rack 5. At this time, the opening on the left side of the box 11 is connected to the internal space of the cover 10, and then connected to the internal space of the storage rack 5. A connecting pipe 15 is also fixedly installed on the side wall of the storage rack 5. The inner end of the connecting pipe 15 is connected to the internal space of the storage rack 5, and the outer end of the connecting pipe 15 is connected to the inside of the cabinet 1.

[0039] When the solenoid valve box is used in a normal room temperature environment, it needs to dissipate heat. At this time, the cover plate 7 is moved forward, so that the cover plate 7 opens the opening of the housing 5, making the internal space of the housing 5 connected with the internal space of the cabinet 1. At this time, the opening on the left side of the box 11 is connected with the inside of the cabinet 1. Rotate the three-way valve 14, so that the exhaust device is connected to the outside through the output pipe 13 and the first output end of the three-way valve 14. When the exhaust device is activated, the solenoid valve 4 inside the cabinet 1 works and generates heat. The hot air inside the cabinet 1 enters the box 11, the input pipe 12, the exhaust device, the output pipe 13 and the three-way valve 14 in sequence, and is discharged to the outside from the first output end of the three-way valve 14. As the hot air inside the cabinet 1 is discharged, a negative pressure is formed inside the cabinet 1, and fresh air from the outside enters the cabinet 1, thus achieving the purpose of heat dissipation.

[0040] When the solenoid valve box is used in extremely cold weather, the interior of the solenoid valve box needs to be protected against freezing and kept warm. At this time, the cover plate 7 is moved backward so that the cover plate 7 seals the opening on the front side of the housing 5, so that a sealed space is formed inside the housing 5. At this time, the opening on the left side of the box body 11 is connected to the internal space of the cover body 10, and then to the internal space of the housing 5. Then, the three-way valve 14 is turned so that the exhaust device is connected to the internal air duct of the housing 5 through the output pipe 13 and the second output end of the three-way valve 14. When the exhaust device is started, the hot air generated inside the housing 5 enters the cover body 10 and the box body in sequence through the through groove 8 on the cover plate 7. 11. The system includes an inlet pipe 12, an exhaust device, an outlet pipe 13, and a three-way valve 14. The hot air enters the air duct of the housing 5 through the second outlet of the three-way valve 14. The hot air circulates around the housing 5 once within the air duct and is then discharged into the cabinet 1. The hot air inside the housing 5 creates a negative pressure due to the discharge. The air inside the cabinet 1 enters the internal space of the housing 5 through the connecting pipe 15, forming an internal air circulation within the cabinet 1 and reducing heat dissipation. At this time, the cabinet 1 also forms a natural ventilation circulation with the outside through the air inlet 3. This effectively reduces the rate of temperature loss around the solenoid valve 4, achieving the effect of heat preservation and antifreeze.

[0041] In this embodiment, the air duct is an annular channel 16 opened inside the housing 5, and the connecting pipe 15 divides the annular channel 16 into discontinuous channels. The second output end of the three-way valve 14 is located below the connecting pipe 15 and communicates with the annular channel 16. An air outlet 17 communicating with the annular channel 16 is opened on the outer surface of the housing 5 located above the connecting pipe 15. When used in cold regions, the hot air in the housing 5 enters the cover 10, the input pipe 12, the exhaust device, the output pipe 13, the three-way valve 14, the second output end, the annular channel 16 and the air outlet 17 in sequence through the through groove 8 on the cover plate 7. The hot air coming out of the air outlet 17 enters the internal space of the cabinet 1. As the air in the housing 5 is discharged, the internal space of the housing 5 forms a negative pressure. The air in the cabinet 1 enters the internal space of the housing 5 through the connecting pipe 15, realizing the purpose of forming an internal air circulation between the internal space of the housing 5 and the cabinet 1. The air in the cabinet 1 forms natural ventilation with the outside through the air inlet 3, which effectively reduces the temperature loss rate around the solenoid valve 4.

[0042] In this embodiment, the exhaust device includes blades 19 rotatably connected to a through hole 18 inside the cabinet 1. Valve seats 20 are fixedly installed on both sides of the inner wall of the through hole 18. The rotation shafts of the blades 19 are rotatably connected to the valve seats 20. A motor is fixedly installed on the outer side of the inner valve seat 20. The output shaft of the motor is fixedly installed to the rotation shaft of the blades 19. The top end of the input pipe 12 is fixedly installed to the inner valve seat 20, and the bottom end of the input pipe 12 is fixedly installed to the upper end face of the cabinet 11. The input pipe 12 communicates with the internal space of the cabinet 11. The inner end of the output pipe 13 is fixedly installed to the outer valve seat 20. In use, the motor drives the blades 19 to rotate through the rotation shaft of the blades 19. Air enters the input pipe 12 from the cabinet 11, enters the through hole 18 from the valve hole of the inner valve seat 20, and then enters the output pipe 13 from the valve hole of the outer valve seat 20 under the drive of the blades 19.

[0043] In this embodiment, the first output end of the three-way valve 14 is a first pipeline 21 fixedly installed with the three-way valve 14, and the outer end of the first pipeline 21 is connected to the outside. The second output end of the three-way valve 14 is a second pipeline 22 fixedly installed with the three-way valve 14, and the other end of the second pipeline 22 is fixedly installed with the housing frame 5 and connected to the annular channel 16.

[0044] In this embodiment, a drive rod 23 is fixedly installed at the top of the valve stem of the three-way valve 14, and a limit block 24 is fixedly installed on the upper end face of the three-way valve 14; when the drive rod 23 points in the direction of the second pipeline 22, it means that the output pipe 13 is connected to the second pipeline 22; when the drive rod 23 rotates clockwise (towards...), it indicates that the output pipe 13 is connected to the second pipeline 22. Figure 7 (Based on the top view) When it comes into contact with the limit block 24, it means that the output tube 13 is connected to the first tube 21.

[0045] In this embodiment, a sliding hole 25 is provided in the cabinet door 2, and the cover plate 7 is slidably disposed in the sliding hole 25 in the front-back direction; when the cover plate 7 moves back and forth, the cover plate 7 moves back and forth in the sliding hole 25 in the cabinet door 2.

[0046] In this embodiment, a sliding groove 26 is provided on the outer side of the cover plate 7 along the front-back direction. A frame 27 is fixedly provided around the sliding hole 25 on the rear side of the cabinet door 2. A slider 28 is fixedly provided on the inner side wall of the frame 27 at the position corresponding to the sliding groove 26. The cover plate 7 is slidably connected to the frame 27 through the slider 28 and the sliding groove 26. When the cover plate 7 moves back and forth, the cooperation of the slider 28 and the sliding groove 26 makes the back-and-forth movement of the cover plate 7 more stable. When the cover plate 7 moves forward until the inner side wall of the inner end of the sliding groove 26 abuts against the slider 28, the cover plate 7 moves outward to the limit position. When the cover plate 7 moves backward, the rear side of the cover plate 7 abuts against the front side of the housing frame 5, and the cover plate 7 moves to the limit position.

[0047] In this embodiment, a partition 29 is fixedly installed along the upper and lower edges of the inner edge of the accommodating frame 5. The partition 29 divides the inner edge of the accommodating frame 5 into two spaces, left and right, and the two spaces are connected.

[0048] In this embodiment, a plurality of connecting holes (not shown in the figure) are evenly provided on the partition 29; the function of the connecting holes is to connect the left and right spaces of the accommodating frame 5.

[0049] In this embodiment, a handle 30 is fixedly provided on the front side of the cover plate 7; when opening the cabinet 1, the handle 30 can be pulled by hand. When the handle 30 is pulled to turn the cabinet door 2, the cover plate 7 may slide outward first, but this does not affect the rotation of the cabinet door 2 to open the cabinet 1; when closing the cabinet 1, the cabinet door 2 can be closed with the cabinet 1. At this time, the cover plate 7 can slide forward or backward as needed, and the three-way valve 14 will perform the corresponding operation; to adapt to use in normal weather or in cold regions.

[0050] The working principle of this utility model is as follows: A handle 30 is fixedly provided on the front side of the cover plate 7; when opening the cabinet 1, the handle 30 can be pulled. When the handle 30 is pulled to turn the cabinet door 2, the cover plate 7 may slide outward first, but this does not affect the rotation of the cabinet door 2 to open the cabinet 1; when closing the cabinet 1, the cabinet door 2 can be closed with the cabinet 1. At this time, the cover plate 7 can slide forward or backward as needed, and the three-way valve 14 will perform the corresponding operation; this is to adapt to use in normal weather or in cold regions; in normal weather, the cover plate 7 is moved forward to open the storage rack 5. The opening on the left side of the cabinet 11 connects the internal space of the storage rack 5 with the internal space of the cabinet 1. Rotating the drive rod 23 of the three-way valve 14 positions the drive rod 23 in contact with the limit block 24. The motor starts, driving the blades 19 to rotate. Hot air from inside the cabinet 1 sequentially enters the cabinet 11, the input pipe 12, the exhaust device, the output pipe 13, and the three-way valve 14, and is discharged to the outside through the first pipe 21 of the three-way valve 14. Due to the discharge of hot air from inside the cabinet 1, a negative pressure is created inside the cabinet 1, and fresh air from the outside enters through the air inlet 3. Inside cabinet 1, heat dissipation is achieved. When the solenoid valve box is used in extremely cold weather, the interior of the solenoid valve box needs to be protected against freezing and kept warm. At this time, the cover plate 7 is moved backward, so that the cover plate 7 seals the opening on the front side of the housing 5, so that a sealed space is formed inside the housing 5. At this time, the opening on the left side of the cabinet 11 is connected to the internal space of the cover 10, and then connected to the internal space of the housing 5. Then, the drive rod 23 of the three-way valve 14 is rotated to point to the second pipe 22, and the motor is started to drive the blade 19 to rotate. The hot air generated inside the housing 5 enters through the through groove 8 on the cover plate 7. The enclosure 10, box 11, inlet pipe 12, exhaust device, outlet pipe 13 and three-way valve 14 are connected. The hot air enters the annular channel 16 of the storage rack 5 through the second pipe 22 of the three-way valve 14. The hot air circulates around the storage rack 5 in the air duct of the storage rack 5 and is discharged into the cabinet 1 from the air outlet 17. The internal space of the storage rack 5 forms a negative pressure due to the discharge of hot air. The air in the cabinet 1 enters the internal space of the storage rack 5 through the connecting pipe 15, forming an internal circulation of air inside the cabinet 1 and reducing heat dissipation. At this time, the inside of the cabinet 1 also forms a natural ventilation circulation with the outside through the air inlet 3.

Claims

1. An electromagnetic valve box having an anti-freezing effect, characterized by: The utility model relates to a cabinet air supply and exhaust device, including cabinet (1) and hinged cabinet door (2) in the front side of cabinet (1), the bottom of left side of cabinet (1) is provided with air inlet (3), the inside fixed setting of cabinet (1) is provided with the accommodation frame (5) of electromagnetic valve (4), the inside of cabinet door (2) is provided with the sliding of cover plate (7) along the front and back direction, the front side of cover plate (7) is provided with a plurality of corresponding through slot (8) of compressed air pipe (6), the front side of cover plate (7) is provided with the notch (9) of all communication with every through slot (8), cover plate (7) is fixedly provided with the cover body (10) of the front side sealing of notch (9), the inside wall of cabinet (1) is fixedly provided with the left opening box (11), and the inside wall of cabinet (1) is provided with the exhaust device, and the input pipe (12) of exhaust device is communicated with the inside space of box (11), and the output pipe (13) of exhaust device is installed and is provided with the three-way valve (14), and the first output end of three-way valve (14) is communicated with the outside, and the second output end of three-way valve (14) is communicated with the air duct of the inside opening of accommodation frame (5), and the side wall of accommodation frame (5) is fixedly provided with the communication pipe (15), and the inner end of communication pipe (15) is communicated with the inside space of accommodation frame (5), and the outer end of communication pipe (15) is communicated with the inside of cabinet (1).

2. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The air duct is annular channel (16) provided in the accommodation frame (5), and the communication pipe (15) divides the annular channel (16) into discontinuous channels, and the second output end of the three-way valve (14) is located below the communication pipe (15) and is communicated with the annular channel (16), and the outer surface of the accommodation frame (5) above the communication pipe (15) is provided with an air outlet (17) communicated with the annular channel (16).

3. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The exhaust device comprises a blade (19) rotatably connected to a through hole (18) formed in the inside of the cabinet (1), valve seats (20) are fixedly arranged on both sides of the inside sidewall of the through hole (18), the rotating shafts of the blade (19) are rotatably connected to the valve seats (20), a motor is fixedly arranged on the outside of the inside valve seat (20), the output shaft of the motor is fixedly arranged with the rotating shaft of the blade (19), the top end of the input pipe (12) is fixedly arranged with the inside valve seat (20), the bottom end of the input pipe (12) is fixedly arranged with the upper end surface of the box (11), and the input pipe (12) is communicated with the inside space of the box (11), and the inner end of the output pipe (13) is fixedly arranged with the outside valve seat (20).

4. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The first output end of the three-way valve (14) is a first pipe (21) fixedly arranged with the three-way valve (14), the outer end of the first pipe (21) is communicated with the outside, the second output end of the three-way valve (14) is a second pipe (22) fixedly arranged with the three-way valve (14), the other end of the second pipe (22) is fixedly arranged with the accommodation frame (5) and communicated with the annular channel (16).

5. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The top end of the valve rod of the three-way valve (14) is fixedly arranged with a driving rod (23), and the upper end surface of the three-way valve (14) is fixedly arranged with a limiting block (24).

6. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The cabinet door (2) is provided with a sliding hole (25), and the cover plate (7) is slidably arranged in the sliding hole (25).

7. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The outer side of the cover plate (7) is provided with a sliding groove (26) in the front-rear direction, the rear side of the cabinet door (2) is fixedly provided with a frame (27) around the sliding hole (25), the inner side wall of the frame (27) is fixedly provided with a sliding block (28) at the corresponding position of the sliding groove (26), and the cover plate (7) is slidably connected with the frame (27) through the sliding block (28) and the sliding groove (26).

8. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The inner side of the accommodating rack (5) is fixedly provided with a partition plate (29) in the up-down direction, the partition plate (29) divides the inner side of the accommodating rack (5) into two spaces in the left-right direction, and the two spaces are communicated.

9. The freeze-prevention electromagnetic valve box according to claim 8, wherein: The partition plate (29) is uniformly provided with a plurality of communication holes.

10. The freeze-prevention electromagnetic valve box according to claim 1, wherein: The front side of the cover plate (7) is fixedly provided with a handle (30).

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