Cable distribution box device for railway electric power engineering

Abstract

The invention discloses a cable distribution box device for railway electric power engineering, and relates to the technical field of railway electric power engineering, the cable distribution box device comprises a machine body, a heat dissipation guide plate and an air blowing assembly, a fixed partition plate is arranged in the machine body, and a fixed protection assembly is arranged on the side face of the fixed partition plate. According to the cable distribution box device for the railway electric power engineering, by arranging the moisture removal assembly, the water retaining assembly and the air blowing assembly, the purposes of removing moisture, preventing rainwater from entering and adjusting the internal temperature are achieved in the use process of the cable distribution box device for railway electric power engineering construction; when the cable distribution box device is used in railway power engineering, air in the cable distribution box device is dried, rainwater is prevented from entering the cable distribution box device to cause short circuit, equipment in the cable distribution box device is cooled, normal use of the cable distribution box device is guaranteed, and the service life of the cable distribution box device is prolonged. And people can use the cable distribution box conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of railway electric power engineering, in particular to a cable junction box device for railway electric power engineering. Background Art

[0002] Railways are track lines for trains and other vehicles to travel. To ensure the normal operation of railways, power projects need to be set up around the railways. Electricity is an energy source that uses electrical energy as a driving force. It converts primary energy in nature into electricity through mechanical energy devices, and then supplies electricity for use through transmission, substation and distribution. Workers usually use cable junction box devices for railway power projects. For example, a patent document for a moisture-proof and dehumidification device for a cable junction box with application number 201910925471.6 has been disclosed. However, the current cable junction box device still has the following shortcomings: First, the existing cable junction box device has not been fully considered in terms of moisture removal structure. In the process of using the cable junction box device for railway power engineering construction, if the cable junction box device is not fully considered in terms of moisture removal structure, the cable junction box may be affected by the damp air, and the normal use of the cable junction box device cannot be guaranteed, which is inconvenient for the staff to use the cable junction box device; Secondly, the existing cable junction box device has not yet fully considered the cooling structure. During the use of the cable junction box device for railway power engineering construction, if the cable junction box device does not fully consider the cooling structure, the operating temperature of the equipment in the cable junction box device will increase and affect the staff's use of electricity. If the outdoor temperature continues to be low, it may affect the normal operation of the equipment in the cable junction box device, seriously affecting the staff's use of the cable junction box device.

[0003] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing structure and shortcomings, and provides a cable junction box device for railway power engineering. Summary of the invention

[0004] The object of the present invention is to provide a cable junction box device for railway power engineering to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cable junction box device for railway power engineering, comprising a body, a heat dissipation guide plate and a blowing assembly, a fixed partition is arranged inside the body, and a fixed protective assembly is arranged on the side of the fixed partition plate, and the fixed protective assembly comprises a fixed protective ring, a first arc block, a fixed ring, a rotating rod, a second arc block and a connecting bolt, the heat dissipation guide plate is arranged on the left and right sides of the body, and a dehumidification assembly is arranged on the inner side of the heat dissipation guide plate, and the dehumidification assembly comprises a storage groove, a fixed snap-fit ​​strip, a breathable net, a movable breathable plate, a square block, a pull ring and a square snap-fit ​​rod, and a water retaining assembly is arranged on the outer side of the heat dissipation guide plate, and the water retaining assembly comprises a baffle plate, a sliding block, a fixed support rod and an arc snap-fit ​​block, the blowing assembly is arranged on the inner bottom of the body, and the blowing assembly comprises a breathable baffle plate, a fan, a support net and a heating plate.

[0006] Furthermore, a high-density base is provided at the bottom of the body, and an inclined plate is fixedly connected to the side of the body, and the inclined plate is fixedly connected to the high-density base, and a movable sealing door is provided on the front side of the body, and a concave handle is provided on the surface of the movable sealing door.

[0007] Furthermore, one side of the fixed protective ring is fixedly connected to a first arc block, and a fixed ring is welded to one side of the top end of the first arc block, and a rotating rod is movably connected to the center of the fixed ring, and one side of the fixed protective ring is fixedly connected to a second arc block, and a connecting bolt is arranged at the center of the second arc block.

[0008] Furthermore, a barrier net is provided on one side of the heat dissipation guide plate, and the barrier net is fixedly connected to the inner wall of the body.

[0009] Furthermore, fixed snap-fit ​​strips are welded on the upper and lower surfaces of the storage slot, a breathable net is fixedly connected to one side of the storage slot, and a movable breathable plate is rotatably connected to one side of the storage slot.

[0010] Furthermore, a square block is welded on the surface of the movable air-permeable plate, a pull ring is arranged above the square block, a square clamping rod is welded at the bottom of the pull ring, and the square blocks are fixedly connected by the square clamping rod.

[0011] Furthermore, a square block is fixedly connected to the side wall of the body, and sliding slots are provided on the surfaces of the square block and the fixed partition, and the cross-sectional shape and size of the fixed snap-fit ​​strip in the dehumidification assembly match the cross-sectional shape and size of the sliding slot, and the fixed snap-fit ​​strip is snap-connected to the fixed partition, and at the same time, the fixed snap-fit ​​strip is snap-connected to the square block.

[0012] Furthermore, a sliding groove is provided on the outer surface of the blocking plate, and the blocking plate is slidably connected to a sliding block through the sliding groove, and a fixed support rod is provided on one side of the end of the blocking plate, and an arc-shaped locking block is fixedly connected to one side of the fixed support rod, and the blocking plate is locked and connected to the arc-shaped locking block.

[0013] Furthermore, an inclined rain shield is fixedly connected to the top of the body, and a fixed block is fixedly connected to the lower side of the inclined rain shield, and the surface of the fixed block is provided with engaging holes, and the blocking plate is rotatably connected to the body, and the sliding block is engaged with the fixed block.

[0014] Furthermore, a fan is provided on one side below the air-permeable baffle, and one side of the fan is rotatably connected to a support net, and a side of the support net is fixedly connected to the air-permeable baffle, and a heating plate is provided below the air-permeable baffle.

[0015] The present invention provides a cable junction box device for railway power engineering, which has the following beneficial effects: 1. The present invention is provided with a dehumidification component. By arranging the dehumidification component on the inner side of the heat dissipation guide plate, opening the movable air-permeable plate rotatably connected to one side of the storage slot in the dehumidification component, placing the dehumidification desiccant in the storage slot, and then closing the movable air-permeable plate, and using a square clamping rod to fix the square block fixedly connected to the surface of the movable air-permeable plate, and then using the fixed clamping strips welded above and below the storage slot, the dehumidification component is clamped and connected between the fixed partition plate and the square clamping block fixedly connected to the inner wall of the machine body. The improved device uses the dehumidification component to achieve the purpose of dehumidification during the use of the cable junction box device in the construction of railway power engineering. During the use of the cable junction box device in the railway power engineering, the air in the cable junction box is dried to avoid affecting the use of electricity due to humid air in the cable junction box, ensuring the normal use of the cable junction box device, and facilitating the use of the cable junction box device by the staff.

[0016] 2. The present invention is provided with a water-blocking assembly. By arranging the water-blocking assembly on the outer side of the heat dissipation guide plate, the arc-shaped snap-fitting block welded on the side of the fixed support rod is snap-fitted with the baffle plate, so that the baffle plate can achieve the effect of blocking rain. In addition, the staff can rotate the baffle plate so that the sliding block slidably connected to the outer side of the baffle plate is snap-fitted with the inclined rain shield plate, thereby fixing the baffle plate. The improved device uses the water-blocking assembly to prevent the cable junction box device from entering during the use of railway power engineering construction. In the process of using the cable junction box device for railway power engineering, rainwater is prevented from entering the interior of the cable junction box device to cause a circuit short circuit, thereby ensuring the normal use of the cable junction box device, and making the gas flow smoother, achieving a certain heat dissipation and cooling effect, and facilitating people's use of the cable junction box.

[0017] 3. The present invention is provided with a blowing assembly. By arranging the blowing assembly at the inner bottom of the body and using a fan to blow air, the gas is circulated inside the body to dissipate heat and cool down the equipment inside the cable junction box device. When the temperature is low and affects the normal use of the equipment inside the cable junction box device, the heating plate under the air-permeable baffle can be opened. Under the action of the fan, the temperature of the gas circulating inside the body is increased. The improved device uses the blowing assembly to achieve the purpose of regulating the internal temperature of the cable junction box device during the use of railway power engineering construction. When the cable junction box device is used for railway power engineering, the air inside the cable junction box device is circulated to dissipate heat and cool down the equipment inside the cable junction box device to avoid the temperature of the equipment from rising and affecting the use of electricity. The temperature inside the device is adjusted to a certain extent to avoid the situation where the temperature is low and affects the normal operation of electricity, which is convenient for the staff to use the cable junction box device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of a cable junction box device for railway power engineering of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of a cable junction box device for railway power engineering of the present invention; Figure 3 A cable junction box device for railway power engineering of the present invention Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 A cable junction box device for railway power engineering of the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a schematic diagram of the three-dimensional structure of a fixed protection component of a cable junction box device for railway power engineering of the present invention; Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a moisture removal component of a cable junction box device for railway electric power engineering.

[0019] In the figure: 1, machine body; 2, high-density base; 3, tilting plate; 4, movable sealing door; 5, fixed partition; 6, fixed protection component; 601, fixed protection ring; 602, first arc block; 603, fixed ring; 604, rotating rod; 605, second arc block; 606, connecting bolt; 7, heat dissipation guide plate; 8, blocking leakage net; 9, dehumidification component; 901, storage slot; 902, fixed snap-fit ​​strip; 903, breathable net; 90 4. Movable air-permeable plate; 905. Square block; 906. Pull ring; 907. Square clamping rod; 10. Square clamping block; 11. Water-blocking assembly; 1101. Blocking plate; 1102. Sliding clamping block; 1103. Fixed support rod; 1104. Arc-shaped clamping block; 12. Inclined rain shield; 13. Fixed clamping block; 14. Blowing assembly; 1401. Air-permeable baffle; 1402. Fan; 1403. Support net; 1404. Heating plate. DETAILED DESCRIPTION

[0020] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, a cable junction box device for railway power engineering includes a body 1, a heat dissipation guide plate 7 and a blowing assembly 14, a fixed partition plate 5 is arranged inside the body 1, a high-density base 2 is arranged at the bottom of the body 1, and an inclined plate 3 is fixedly connected to the side of the body 1, and the inclined plate 3 is fixedly connected to the high-density base 2, and a movable sealing door 4 is arranged on the front side of the body 1, and a concave handle is provided on the surface of the movable sealing door 4 to raise the height of the body 1, so that the staff can use and maintain the cable junction box device, and a fixed protective assembly 6 is arranged on the side of the fixed partition plate 5, and the fixed protective assembly 6 includes a fixed protective ring 601, a first arc block 602, a fixed ring 603, a rotating rod 604, and a second arc block 605. 05 and connecting bolts 606, one side of the fixed protection ring 601 is fixedly connected with the first arc block 602, and a fixing ring 603 is welded on one side of the top of the first arc block 602, and the center of the fixing ring 603 is movably connected with a rotating rod 604, and one side of the fixed protection ring 601 is fixedly connected with the second arc block 605, and the center of the second arc block 605 is provided with a connecting bolt 606, the fixed protection component 6 is used to fix and protect the cables, and the cables are classified and processed, so that the cable junction box device is more convenient to use, the heat dissipation guide plate 7 is arranged on the left and right sides of the body 1, and a blocking net 8 is arranged on one side of the heat dissipation guide plate 7, and the blocking net 8 is fixedly connected to the inner wall of the body 1, and the heat dissipation guide plate 7 is used to block the gas The heat dissipation guide plate 7 is provided with a dehumidification component 9 on its inner side, and the dehumidification component 9 comprises a storage groove 901, a fixed snap-fit ​​strip 902, a breathable net 903, a movable breathable plate 904, a square block 905, a pull ring 906 and a square snap-fit ​​rod 907. The upper and lower surfaces of the storage groove 901 are welded with a fixed snap-fit ​​strip 902, and a breathable net 903 is fixedly connected to one side of the storage groove 901, and a movable breathable plate 904 is rotatably connected to one side of the storage groove 901 up and down, a square block 905 is welded on the surface of the movable breathable plate 904, and a pull ring 906 is provided above the square block 905, and a square snap-fit ​​rod 907 is welded to the bottom of the pull ring 906, and the square The blocks 905 are fixedly connected by a square snap-fitting rod 907 to dry the air in the cable junction box, thereby preventing the use of electricity from being affected by the humid air in the cable junction box and ensuring the normal use of the cable junction box device. The side wall of the body 1 is fixedly connected with a square snap-fitting block 10, and the surfaces of the square snap-fitting block 10 and the fixed partition 5 are provided with sliding slots, and the cross-sectional shape and size of the fixed snap-fitting strip 902 in the dehumidification component 9 match the cross-sectional shape and size of the sliding slot, and the fixed snap-fitting strip 902 is snap-fitted with the fixed partition 5, and at the same time, the fixed snap-fitting strip 902 is snap-fitted with the square snap-fitting block 10, so that the connection between the structures is tighter, the structure is more stable and reliable, and it is convenient for the staff to use the cable junction box device; The specific operation is as follows: first, open the movable sealing door 4, place the cable in the fixed protection assembly 6, and use the rotating rod 604 set in the center of the fixed ring 603 set on one side of the first arc block 602 to fix the cable with the fixed protection ring 601, and use the connecting bolt 606 to fix the fixed protection ring 601, then, set the dehumidification assembly 9 on the inner side of the heat dissipation guide plate 7, open the movable breathable plate 904 rotatably connected to one side of the storage slot 901 in the dehumidification assembly 9, place the dehumidification desiccant in the storage slot 901, then close the movable breathable plate 904, and use the square clamping rod 907 to fix the square block 905 fixedly connected to the surface of the movable breathable plate 904, and then use the fixed clamping strip 902 welded on the upper and lower sides of the storage slot 901 to clamp the dehumidification assembly 9 between the fixed partition 5 and the square clamping block 10 fixedly connected to the inner wall of the body 1.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, a water retaining assembly 11 is arranged on the outer side of the heat dissipation guide plate 7, and the water retaining assembly 11 includes a baffle plate 1101, a sliding block 1102, a fixed support rod 1103 and an arc-shaped snap-fit ​​block 1104. A sliding groove is provided on the outer surface of the baffle plate 1101, and the baffle plate 1101 is slidably connected to the sliding block 1102 through the sliding groove, and a fixed support rod 1103 is arranged on one side of the end of the baffle plate 1101, and one side of the fixed support rod 1103 is fixedly connected to the arc-shaped snap-fit ​​block 1104, and the baffle plate 1101 is snap-fitted and connected with the arc-shaped snap-fit ​​block 1104. When the cable junction box device is used for During the use of railway power engineering, rainwater is prevented from entering the interior of the cable junction box device and causing a circuit short circuit, thereby ensuring the normal use of the cable junction box device. An inclined rain shield 12 is fixedly connected to the top of the body 1, and a fixed clamp 13 is fixedly connected to the lower side of the inclined rain shield 12, and a clamping hole is provided on the surface of the fixed clamp 13. The baffle plate 1101 is rotatably connected to the body 1, and the sliding clamp 1102 is clamped and connected to the fixed clamp 13. The baffle plate 1101 can be rotated to make the gas flow smoother, thereby achieving a certain heat dissipation and cooling effect, and facilitating people's use of the cable junction box. The specific operation is as follows: the arc-shaped locking block 1104 welded on the side of the fixed support rod 1103 in the water-blocking assembly 11 arranged on the outside of the heat dissipation guide plate 7 is locked and connected with the blocking plate 1101, so that the blocking plate 1101 can achieve the effect of blocking rain. In addition, the staff can rotate the blocking plate 1101 so that the sliding locking block 1102 slidingly connected to the outside of the blocking plate 1101 is locked and connected with the inclined rain shield 12, so as to fix the blocking plate 1101.

[0023] like Figure 2As shown, the blowing assembly 14 is arranged at the inner bottom of the body 1, and the blowing assembly 14 includes a breathable baffle 1401, a fan 1402, a support net 1403 and a heating plate 1404. The fan 1402 is arranged on one side below the breathable baffle 1401, and one side of the fan 1402 is rotatably connected to the support net 1403, and the side of the support net 1403 is fixedly connected to the breathable baffle 1401, and a heating plate 1404 is arranged below the breathable baffle 1401, so that the air inside the cable junction box device flows, and the equipment inside the cable junction box device is cooled and cooled to avoid the temperature of the equipment rising and affecting the use of electricity, and the temperature inside the device is adjusted to a certain extent to avoid the situation where the temperature is low and the normal operation of electricity is affected, so that the staff can use the cable junction box device conveniently; The specific operation is as follows: use the fan 1402 in the blowing assembly 14 arranged at the bottom of the body 1 to blow air, so that the gas circulates inside the body 1, and the equipment inside the cable junction box device is dissipated and cooled. When the temperature is low and affects the normal use of the equipment inside the cable junction box device, the heating plate 1404 under the breathable baffle 1401 can be opened. Under the action of the fan 1402, the temperature of the gas circulating inside the body 1 is increased, thereby adjusting the temperature inside the device to a certain extent.

[0024] In summary, combined Figure 1-Figure 6As shown, the working principle of the cable junction box device for railway power engineering is as follows: first, open the movable sealing door 4, place the cable in the fixed protection component 6, and use the rotating rod 604 set in the center of the fixed ring 603 set on one side of the first arc block 602 to fix the cable with the fixed protection ring 601, and use the connecting bolt 606 to fix the fixed protection ring 601, then, set the dehumidification component 9 on the inner side of the heat dissipation guide plate 7, open the movable breathable plate 904 rotatably connected to one side of the storage groove 901 in the dehumidification component 9, place the dehumidification desiccant in the storage groove 901, then close the movable breathable plate 904, and use the square clamping rod 907 to fix the square block 905 fixedly connected to the surface of the movable breathable plate 904, then use the fixed clamping strip 902 welded above and below the storage groove 901 to clamp the dehumidification component 9 between the fixed partition plate 5 and the square clamping block 10 fixedly connected to the inner wall of the body 1, then, The arc-shaped locking block 1104 welded on the side of the fixed support rod 1103 in the water-blocking assembly 11 arranged on the outside of the heat dissipation guide plate 7 is locked and connected with the baffle plate 1101, so that the baffle plate 1101 can achieve the effect of keeping out rain. In addition, the staff can rotate the baffle plate 1101 so that the sliding locking block 1102 slidably connected to the outside of the baffle plate 1101 is locked and connected with the inclined rain shield 12, so as to fix the baffle plate 1101. In addition, the fan 1402 in the blowing assembly 14 arranged at the bottom of the body 1 is used to blow air so that the gas circulates inside the body 1, and the equipment inside the cable junction box device is dissipated and cooled. When the temperature is low and affects the normal use of the equipment inside the cable junction box device, the heating plate 1404 under the breathable baffle 1401 can be opened, and the temperature of the gas circulating inside the body 1 is increased under the action of the fan 1402, thereby adjusting the temperature inside the device to a certain extent.

[0025] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A cable junction box device for railway power engineering, comprising a body (1), a heat dissipation guide plate (7) and a blowing assembly (14), characterized in that: The body (1) is provided with a fixed partition (5) inside, and a fixed protection assembly (6) is provided on the side of the fixed partition (5), and the fixed protection assembly (6) comprises a fixed protection ring (601), a first arc block (602), a fixed ring (603), a rotating rod (604), a second arc block (605) and a connecting bolt (606), the heat dissipation guide plate (7) is provided on the left and right sides of the body (1), and a dehumidification assembly (9) is provided on the inner side of the heat dissipation guide plate (7), and the dehumidification assembly (9) comprises a storage groove (901), a fixed snap-fit ​​strip (902), and a breathable net ( 903), a movable air permeable plate (904), a square block (905), a pull ring (906) and a square locking rod (907), and a water retaining assembly (11) is arranged on the outer side of the heat dissipation guide plate (7), and the water retaining assembly (11) comprises a baffle plate (1101), a sliding locking block (1102), a fixed support rod (1103) and an arc-shaped locking block (1104), and the blowing assembly (14) is arranged on the inner bottom of the body (1), and the blowing assembly (14) comprises an air permeable baffle (1401), a fan (1402), a support net (1403) and a heating plate (1404).

2. A cable junction box device for railway power engineering according to claim 1, characterized in that: The bottom of the machine body (1) is provided with a high-density base (2), and the side of the machine body (1) is fixedly connected with an inclined plate (3), and the inclined plate (3) is fixedly connected to the high-density base (2), and the front side of the machine body (1) is provided with a movable sealing door (4), and a concave handle is provided on the surface of the movable sealing door (4).

3. A cable junction box device for railway power engineering according to claim 1, characterized in that: One side of the fixed protective ring (601) is fixedly connected to a first arc block (602), and a fixed ring (603) is welded to one side of the top end of the first arc block (602), and the center of the fixed ring (603) is movably connected to a rotating rod (604), and one side of the fixed protective ring (601) is fixedly connected to a second arc block (605), and a connecting bolt (606) is provided at the center of the second arc block (605).

4. A cable junction box device for railway power engineering according to claim 1, characterized in that: A blocking net (8) is provided on one side of the heat dissipation guide plate (7), and the blocking net (8) is fixedly connected to the inner wall of the machine body (1).

5. A cable junction box device for railway power engineering according to claim 1, characterized in that: The upper and lower surfaces of the storage slot (901) are welded with fixed snap-fit ​​strips (902), one side of the storage slot (901) is fixedly connected to a breathable net (903), and one side of the storage slot (901) is rotatably connected to a movable breathable plate (904).

6. A cable junction box device for railway power engineering according to claim 1, characterized in that: A square block (905) is welded to the surface of the movable air-permeable plate (904), a pull ring (906) is arranged above the square block (905), a square locking rod (907) is welded to the bottom of the pull ring (906), and the square blocks (905) are fixedly connected via the square locking rod (907).

7. A cable junction box device for railway power engineering according to claim 1, characterized in that: A square card block (10) is fixedly connected to the side wall of the machine body (1), and sliding card slots are provided on the surfaces of the square card block (10) and the fixed partition (5), and the cross-sectional shape and size of the fixed card strip (902) in the dehumidification component (9) match the cross-sectional shape and size of the sliding card slot, and the fixed card strip (902) is snap-connected to the fixed partition (5), and the fixed card strip (902) is snap-connected to the square card block (10).

8. A cable junction box device for railway power engineering according to claim 1, characterized in that: The outer surface of the blocking plate (1101) is provided with a sliding groove, and the blocking plate (1101) is slidably connected to a sliding clamping block (1102) via the sliding groove, and a fixed support rod (1103) is provided on one side of the end of the blocking plate (1101), and an arc-shaped clamping block (1104) is fixedly connected to one side of the fixed support rod (1103), and the blocking plate (1101) is clamped and connected to the arc-shaped clamping block (1104).

9. A cable junction box device for railway power engineering according to claim 1, characterized in that: An inclined rain shield (12) is fixedly connected to the upper part of the machine body (1), and a fixed clamping block (13) is fixedly connected to the lower part of the side of the inclined rain shield (12), and a clamping hole is provided on the surface of the fixed clamping block (13), and the blocking plate (1101) is rotatably connected to the machine body (1), while the sliding clamping block (1102) is clamped and connected to the fixed clamping block (13).

10. A cable junction box device for railway power engineering according to claim 1, characterized in that: A fan (1402) is provided on one side below the air-permeable baffle (1401), and one side of the fan (1402) is rotatably connected to a support net (1403), and a side of the support net (1403) is fixedly connected to the air-permeable baffle (1401), and a heating plate (1404) is provided below the air-permeable baffle (1401).

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