CN218632847U

CN218632847U - Dampproofing formula high tension switchgear

Info

Publication number: CN218632847U
Application number: CN202222646907.8U
Authority: CN
Inventors: 于林; 刘德义; 杨根利; 刘绍俊
Original assignee: Henan Xindian Electric Appliance Group Power Transmission And Distribution Co ltd
Current assignee: Henan Xindian Electric Appliance Group Power Transmission And Distribution Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-03-14
Anticipated expiration: 2032-10-08

Abstract

The utility model discloses a damp-proof high-voltage switch cabinet, which comprises a cabinet body, wherein the inner wall of the cabinet body is provided with a left clapboard and a right clapboard, and the interior of the cabinet body is divided into a moisture absorption chamber, an element chamber and an exhaust chamber; a vertical plate is arranged in the moisture absorption chamber, the vertical plate divides the moisture absorption chamber into a first air channel and a second air channel, and a gap is arranged at the bottom of the vertical plate; an air inlet is arranged on the part of the side wall of the cabinet body, which is positioned on the first air channel; a first opening and closing assembly is arranged in the first air duct; an exhaust fan, a horizontal fixed plate and a drying agent plate are sequentially arranged in the second air channel from bottom to top; an air outlet I is formed in the part, above the drying agent plate, of the left partition plate; an air outlet II is formed in the fixed plate; an air outlet III is arranged on the part, positioned between the fixed plate and the exhaust fan, of the left partition plate; a second opening and closing component is arranged below the fixed plate, and the opening and closing states of the second air outlet and the third air outlet are opposite; the right clapboard is provided with an exhaust fan; an air outlet is arranged on the side wall of the air exhaust chamber, and a third opening and closing assembly is arranged in the air exhaust chamber.

Description

Dampproofing formula high tension switchgear

Technical Field

The utility model relates to a cubical switchboard technical field, concretely relates to dampproofing formula high tension switchgear.

Background

Various electrical components are installed in the high-voltage switch cabinet, the internal structure arrangement is compact, so that the insulation distance is smaller, and in addition, due to the influence of some special operating conditions and environments, the situation that the insulation capacity is reduced due to moisture, even the internal discharge and the insulation breakdown are caused to cause explosion is possible. The Chinese journal, namely 'architectural research prophase' 2017 in 35 th year, "moisture prevention and dehumidification treatment for high-voltage switch cabinets" is recorded, the main reasons that condensation and high humidity are generated in the high-voltage switch cabinets are that most areas in China are in temperate and subtropical monsoon climates, and high temperature and raininess are caused in summer. Therefore, when the interior of the cabinet is ventilated and dehumidified by installing the exhaust fan, the air entering the cabinet needs to be dehumidified in advance. Common dehumidification mode has condensation dehumidification and drier dehumidification, the structure of condensation dehumidification is too complicated, drier dehumidification simple structure, but air humidity to external environment lacks the judgement, when external air humidity is little and need not carry out leading processing to the air current, external air still need pass through the drier earlier before getting into the cabinet body, lead to this can directly be used for the dampproofing air current of ventilation still need pass through the drier earlier just can get into the cabinet body, the air current resistance of whole stroke is great, the effect of ventilation dehumidification is relatively poor.

SUMMERY OF THE UTILITY MODEL

To the deficiency among the prior art, the utility model discloses a following technical scheme:

a moistureproof high-voltage switch cabinet comprises a cabinet body, wherein a left partition plate and a right partition plate are arranged on the inner wall of the cabinet body, and the cabinet body is divided into a moisture absorption chamber positioned on the left side, an element chamber positioned in the middle and an exhaust chamber positioned on the right side; a vertical plate is arranged in the moisture absorption chamber, the vertical plate divides the moisture absorption chamber into a first air channel positioned on the left side and a second air channel positioned on the right side, and a gap for communicating the first air channel and the second air channel is arranged at the bottom of the vertical plate; an air inlet is formed in the part, located on the first air duct, of the side wall of the cabinet body; the first air duct is internally provided with a first opening and closing assembly for opening and closing the air inlet; an exhaust fan, a horizontal fixed plate and a drying agent plate are sequentially arranged in the second air channel from bottom to top; an air outlet I is formed in the part, located above the drying agent plate, of the left partition plate; the fixed plate is provided with a second air outlet communicated with the upper side and the lower side of the fixed plate; an air outlet III is formed in the part, between the fixed plate and the exhaust fan, of the left partition plate; an opening and closing assembly II for opening and closing an air outlet II and an air outlet III is arranged below the fixed plate, and the opening and closing states of the air outlet II and the air outlet III are opposite; an exhaust fan used for communicating the element chamber and the exhaust chamber is arranged on the right partition plate; the lateral wall of the exhaust chamber is provided with an exhaust outlet communicated with the outside, and an opening and closing assembly III for opening and closing the exhaust outlet is arranged in the exhaust chamber.

Furthermore, the first opening and closing assembly comprises two slide rails arranged on the upper side and the lower side of the air inlet, a first blocking plate which is slidably clamped in the slide rails and used for closing or opening the air inlet, a first moving block which is arranged on the first blocking plate and far away from one side of the air inlet, a first threaded rod which penetrates through the first moving block, and a first motor which is positioned in the first air channel; two ends of the first threaded rod are rotatably connected with the cabinet body and are in threaded connection with the first moving block; the output end of the first motor is in transmission connection with the first threaded rod.

The opening and closing assembly II comprises a blocking plate II which is arranged in a shape of a Chinese character 'ji', clamping grooves which are respectively formed in the vertical plate and the left partition plate, a moving block II which is arranged on one side, far away from the fixed plate, of the blocking plate II, a threaded rod II which penetrates through the moving block II, and a motor II which is positioned below the blocking plate II; the second plugging plate is connected in the clamping groove in a sliding manner; two ends of the second threaded rod are rotatably connected with the cabinet body and are in threaded connection with the second moving block; and the output end of the second motor is in transmission connection with the second threaded rod.

Furthermore, the third opening and closing assembly comprises two sliding grooves which are formed in the upper side and the lower side of the air outlet, a third blocking plate which is slidably clamped in the sliding grooves and used for closing or opening the air outlet, a third moving block which is arranged on the third blocking plate and far away from one side of the air outlet, a third threaded rod which penetrates through the third moving block, and a third motor which is positioned in the air exhaust chamber, wherein two ends of the third threaded rod are rotatably connected with the cabinet body and are in threaded connection with the third moving block; and the output end of the motor III is in transmission connection with the threaded rod III.

Furthermore, filter screens are embedded at the air inlet, the air outlet and the air outlet, a plurality of drying agent plates are arranged, and the drying agent plates are connected to the grooves in the second air duct in a sliding manner; rain-proof covers are arranged at the air inlet and the air outlet on the outer side of the cabinet body.

Furthermore, at least two baffle plates are arranged below the air inlet in the first air duct and between the exhaust fan and the air outlet in the exhaust chamber; the baffle plates in the first air channel are alternately arranged on the side wall of the cabinet body and the vertical plate, and a gap for accommodating air flow to pass is formed between the free ends of the baffle plates and the side wall of the first air channel; the deflection baffles in the exhaust chamber are alternately arranged on the right partition plate and the side wall of the cabinet body, and a gap for accommodating airflow to pass is formed between the free end of each deflection baffle and the side wall of the exhaust chamber; the baffle plates are inclined downward from the fixed end to the free end.

Further, be located in the moisture absorption room the below of vertical plate and the bottom of the room of airing exhaust all is provided with the baffle of two slopes that gather together to the centre, just the centre of the moisture absorption room is lowest the centre of the room of airing exhaust all is provided with and extends to the external blow off pipe of cabinet.

Furthermore, a temperature sensor, a first humidity sensor and a controller are arranged in the element chamber, and a second humidity sensor used for detecting the external environment is arranged outside the cabinet body; the temperature sensor, the first humidity sensor and the second humidity sensor are connected with the controller, and the controller is connected with the first motor, the second motor, the third motor, the exhaust fan and the exhaust fan.

The utility model has the advantages that: after the airflow enters the first air channel from the air inlet, if the airflow is in summer or other times with high air humidity, the second air outlet is opened, and the third air outlet is closed, so that the airflow passes through the plurality of drying agent plates, enters the element chamber after being pretreated, and is finally discharged from the air outlet; if the air humidity is low in winter or other times, the air outlet III is opened, the air outlet II is closed, and the airflow directly enters the element chamber without passing through the drying agent plate, so that the airflow wind resistance is reduced. The technical scheme of the utility model judges the external air humidity in advance, the air flow which does not need to be dried can directly enter the element room without passing through the drying plate, thereby the ventilation and dehumidification effect is better; additionally the utility model discloses separate the moisture absorption room for first wind channel and second wind channel for the whole U-shaped that is of air current that gets into the air intake, consequently, the stroke of air current can prolong, back in the first wind channel of outside air entering, at first touch each baffling baffle, dust and liquid drop smugglied secretly in the air current, can be because the collision and partial deposit on the baffling baffle, make the air current through the drier board cleaner relatively, be provided with baffling baffle in the room of airing exhaust equally in addition, it is indoor from the interior component that enters into of airing exhaust to place the dust.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 isbase:Sub>A schematic view of the structure of the present invention in the direction A-A;

FIG. 3 is a control schematic diagram of the present invention;

reference numerals: 1. a cabinet body; 2. a left baffle plate; 3. a right baffle plate; 4. a vertical plate; 5. an air outlet I; 6. an element chamber; 7. a first air duct; 8. a second air duct; 9. an air inlet; 10. an air outlet; 11. an exhaust chamber; 12. a first plugging plate; 13. moving a first block; 14. a first threaded rod; 15. a first motor; 16. a baffle plate; 17. a desiccant plate; 18. a fixing plate; 19. a second plugging plate; 20. moving a second block; 21. a second threaded rod; 22. an air outlet III; 23. a second motor; 24. an exhaust fan; 25. a guide plate; 26. a blow-off pipe; 27. a third plugging plate; 28. a third threaded rod; 29. a third motor; 30. an air outlet II; 31. moving blocks III; 32. an exhaust fan.

Detailed Description

The technical solutions of the present invention will be further described below with reference to the accompanying drawings and examples, so that those skilled in the art can more clearly understand the contents of the technical solutions.

Example 1:

as shown in the attached figures 1-2, the utility model discloses a moisture-proof high-voltage switch cabinet, which comprises a cabinet body 1, wherein four supporting legs are arranged at the bottom of the cabinet body. A left partition plate 2 and a right partition plate 3 are arranged on the inner wall of the cabinet body 1, and the interior of the cabinet body 1 is divided into a moisture absorption chamber on the left side, an element chamber 6 in the middle and an exhaust chamber 11 on the right side; a vertical plate 4 is arranged in the moisture absorption chamber, the vertical plate 4 divides the moisture absorption chamber into a first air channel 7 positioned on the left side and a second air channel 8 positioned on the right side, and a gap for communicating the first air channel 7 with the second air channel 8 is formed in the bottom of the vertical plate 4; an air inlet 9 is formed in the part, located on the first air duct 7, of the side wall of the cabinet body 1; a first opening and closing assembly for opening and closing the air inlet 9 is arranged in the first air duct 7; the second air duct 8 is provided with an exhaust fan 24, a horizontal fixing plate 18 and a desiccant plate 17 from bottom to top in sequence. Filter screens are embedded in the air inlet 9, the air outlet 10 and the air outlet three 22, a plurality of drying agent plates 17 are arranged, and the drying agent plates 17 are connected to grooves in the second air duct 8 in a sliding manner; rain-proof covers are arranged at the positions of the air inlet 9 and the air outlet 10 on the outer side of the cabinet body 1.

The side of the cabinet 1 in this embodiment is provided with sealing doors (not shown) at the positions of the element chamber, the moisture absorption chamber and the air exhaust chamber. The sealing door can be opened when the element chamber, the moisture absorption chamber and the exhaust chamber need to be cleaned.

An air outlet I5 is formed in the part, located above the drying agent plate 17, of the left partition plate 2; the fixed plate 18 is provided with a second air outlet 30 communicated with the upper side and the lower side of the fixed plate 18; an air outlet three 22 is arranged on the part, between the fixed plate 18 and the exhaust fan 24, of the left partition plate 2; a second opening and closing component for opening and closing the second air outlet 30 and the third air outlet 22 is arranged below the fixed plate 18, and the opening and closing states of the second air outlet 30 and the third air outlet 22 are opposite; the right partition plate 3 is provided with an exhaust fan 32 for communicating the element chamber 6 and the exhaust chamber 11; an air outlet 10 communicated with the outside is formed in the side wall of the air exhaust chamber 11, and a third opening and closing assembly used for opening and closing the air outlet 10 is arranged in the air exhaust chamber 11.

The indoor below that is located of moisture absorption the vertical plate 4 and the bottom of exhaust chamber 11 all is provided with the baffle 25 to two slopes that gather together in the middle, just the middle lowest of moisture absorption room the middle lowest of exhaust chamber 11 all is provided with the blow off pipe 26 that extends to the cabinet body 1 outer.

In the embodiment, when the humidity of the outside air is higher, the air inlet and the air outlet II are opened, and the air outlet III is closed, so that the air flow enters the first air channel, then passes through the multiple layers of drying agent plates and then enters the element chamber, and finally the moisture in the element chamber is taken out from the air outlet; when the humidity of the outside air is low, the air inlet and the air outlet III are opened, and the air outlet II is closed, so that the airflow directly enters the element chamber without passing through the drying agent plate, the wind resistance is reduced, and the dehumidification effect is enhanced.

Example 2:

this example differs from example 1 in that: the first opening and closing assembly comprises two slide rails arranged on the upper side and the lower side of the air inlet 9, a first blocking plate 12 which is connected in the slide rails in a sliding and clamping manner and used for closing or opening the air inlet 9, a first moving block 13 which is arranged on one side, far away from the air inlet 9, of the first blocking plate 12, a first threaded rod 14 penetrating through the first moving block 13, and a first motor 15 positioned in the first air duct 7; two ends of the first threaded rod 14 are rotatably connected with the cabinet body 1 and are in threaded connection with the first moving block 13; the output end of the first motor 15 is in transmission connection with the first threaded rod 14.

The opening and closing assembly II comprises a second blocking plate 19 which is arranged in a shape of a Chinese character 'ji', clamping grooves which are respectively arranged on the vertical plate 4 and the left partition plate 2, a second moving block 20 which is arranged on the second blocking plate 19 and is far away from one side of the fixed plate 18, a second threaded rod 21 which penetrates through the second moving block 20, and a second motor 23 which is positioned below the second blocking plate 19; the second plugging plate 19 is connected in the clamping groove in a sliding manner; two ends of the second threaded rod 21 are rotatably connected with the cabinet body 1 and are in threaded connection with the second moving block 20; the output end of the second motor 23 is in transmission connection with the second threaded rod 21.

The opening and closing assembly III comprises two sliding grooves which are formed in the upper side and the lower side of the air outlet 10, a blocking plate III 27 which is slidably clamped in the sliding grooves and used for closing or opening the air outlet 10, a moving block III 31 which is arranged on the blocking plate III 27 and far away from one side of the air outlet 10, a threaded rod III 28 which penetrates through the moving block III 31, and a motor III 29 which is positioned in the air exhaust chamber 11, wherein two ends of the threaded rod III 28 are rotatably connected with the cabinet body 1 and are in threaded connection with the moving block III 31; the output end of the motor III 29 is in transmission connection with the threaded rod III 28.

In the embodiment, a specific structure of the first opening and closing assembly, the second opening and closing assembly and the third opening and closing assembly is specifically described, when the first motor rotates, the first threaded rod is driven to rotate, so that the first blocking plate is driven by the moving block to move along the first threaded rod, and the air inlet is closed or opened, and in specific implementation, the first motor and the first threaded rod can be in transmission connection through a synchronous belt or a gear rack; when the motor II rotates, the threaded rod II is driven to rotate, so that the moving block II drives the blocking plate II to move along the threaded rod II, and the air outlet II is closed, the air outlet III is opened, or the air outlet II is opened, and the air outlet III is closed; when the third motor rotates, the third threaded rod is driven to rotate, the third movable block drives the third plugging plate to move along the third threaded rod, and therefore the air outlet is opened or closed.

Example 3:

this example differs from example 2 in that: at least two baffle plates 16 are arranged in the first air duct 7 below the air inlet 9 and in the exhaust chamber 11 between the exhaust fan 31 and the exhaust outlet 10; the baffle plates 16 in the first air duct 7 are alternately arranged on the side wall of the cabinet body 1 and the vertical plate 4, and a gap for accommodating air flow is arranged between the free end of the baffle plate 16 and the side wall of the first air duct 7; the baffle plates 16 in the exhaust chamber 11 are alternately arranged on the right partition plate 3 and the side wall of the cabinet body 1, and a gap for accommodating airflow to pass is arranged between the free ends of the baffle plates 16 and the side wall of the exhaust chamber 11; the baffle 16 is inclined gradually downward from the fixed end to the free end. In the embodiment, the baffle is additionally arranged, after the airflow enters the first air duct from the air inlet, the airflow is in an S-shaped airflow channel in the first air duct due to the existence of the baffle, and liquid drops and dust carried in the airflow can impact the baffle in the flowing process of the airflow, so that the airflow is deposited on the surface of the baffle, the airflow is subjected to preliminary dust removal, and the airflow entering the desiccant plate is cleaner; in addition, the baffle plate in the exhaust chamber can prevent dust or insects from entering the element chamber through an exhaust outlet.

Example 4:

the present embodiment differs from embodiment 3 in that: a temperature sensor, a first humidity sensor and a controller are arranged in the element chamber 6, and a second humidity sensor for detecting the external environment is arranged outside the cabinet body 1; the temperature sensor, the first humidity sensor and the second humidity sensor are connected with the controller, and the controller is connected with the first motor 15, the second motor 23, the third motor 29, the exhaust fan 24 and the exhaust fan 31. The temperature sensor and the humidity sensor in the embodiment are all the same in common model in the prior art, and the controller is a PLC controller. When the high internal temperature or the high humidity is detected and the ventilation and moisture prevention are needed, if the external humidity is detected by the external humidity sensor II and is smaller than the internal humidity, the controller controls the suction fan and the exhaust fan to be opened, the air inlet and the air outlet are opened by the motor I and the motor III simultaneously, the air outlet II is closed by the motor II and the air outlet III is opened, so that external air flow directly enters the element chamber to ventilate and prevent moisture. When the detected external humidity is higher, the controller controls the first motor and the third motor to simultaneously open the air inlet and the air outlet, the second motor controls the third air outlet to be closed and the second air outlet to be opened, so that airflow firstly passes through the desiccant plate and enters the element chamber to ventilate and damp-proof the element chamber. And after the ventilation and damp proofing are finished, closing the air inlet, the air outlet, the exhaust fan and the exhaust fan.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the present specification can be changed, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The utility model provides a dampproofing formula high tension switchgear, includes the cabinet body (1), its characterized in that: the inner wall of the cabinet body (1) is provided with a left partition plate (2) and a right partition plate (3) which divide the interior of the cabinet body (1) into a moisture absorption chamber positioned on the left side, an element chamber (6) positioned in the middle and an exhaust chamber (11) positioned on the right side; a vertical plate (4) is arranged in the moisture absorption chamber, the vertical plate (4) divides the moisture absorption chamber into a first air channel (7) positioned on the left side and a second air channel (8) positioned on the right side, and a gap for communicating the first air channel (7) with the second air channel (8) is formed in the bottom of the vertical plate (4); an air inlet (9) is formed in the part, located on the first air duct (7), of the side wall of the cabinet body (1); a first opening and closing assembly for opening and closing the air inlet (9) is arranged in the first air duct (7); an exhaust fan (24), a horizontal fixing plate (18) and a drying agent plate (17) are sequentially arranged in the second air duct (8) from bottom to top; an air outlet I (5) is formed in the part, located above the drying agent plate (17), of the left partition plate (2); the fixed plate (18) is provided with a second air outlet (30) communicated with the upper side and the lower side of the fixed plate (18); an air outlet III (22) is formed in the part, located between the fixing plate (18) and the exhaust fan (24), of the left partition plate (2); a second opening and closing component for opening and closing the second air outlet (30) and the third air outlet (22) is arranged below the fixed plate (18), and the opening and closing states of the second air outlet (30) and the third air outlet (22) are opposite; an exhaust fan (32) used for communicating the element chamber (6) and the exhaust chamber (11) is arranged on the right partition plate (3); be provided with on the lateral wall of exhaust chamber (11) and be used for with external air exit (10) of intercommunication, be provided with the subassembly III of opening and close that is used for opening and close air exit (10) in exhaust chamber (11).

2. A moisture-proof high-voltage switchgear cabinet as claimed in claim 1, characterized in that: the opening and closing assembly I comprises two sliding rails arranged on the upper side and the lower side of the air inlet (9), a first blocking plate (12) which is connected in the sliding rails in a sliding and clamping mode and used for closing or opening the air inlet (9), a first moving block (13) which is arranged on one side, far away from the air inlet (9), of the first blocking plate (12), a first threaded rod (14) penetrating through the first moving block (13), and a first motor (15) located in the first air duct (7); two ends of the first threaded rod (14) are rotatably connected with the cabinet body (1) and are in threaded connection with the first moving block (13); the output end of the first motor (15) is in transmission connection with the first threaded rod (14).

3. A moisture-proof high-voltage switchgear cabinet as claimed in claim 2, characterized in that: the opening and closing assembly II comprises a second blocking plate (19) which is arranged in a shape of a Chinese character 'ji', clamping grooves which are respectively arranged on the vertical plate (4) and the left partition plate (2), a second moving block (20) which is arranged on one side, far away from the fixed plate (18), of the second blocking plate (19), a second threaded rod (21) which penetrates through the second moving block (20), and a second motor (23) which is positioned below the second blocking plate (19); the second blocking plate (19) is connected in the clamping groove in a sliding mode; two ends of the second threaded rod (21) are rotatably connected with the cabinet body (1) and are in threaded connection with the second moving block (20); the output end of the second motor (23) is in transmission connection with the second threaded rod (21).

4. A moisture-proof high-voltage switchgear cabinet as claimed in claim 3, characterized in that: the opening and closing assembly III comprises two sliding grooves which are formed in the upper side and the lower side of the air outlet (10), a blocking plate III (27) which is slidably clamped in the sliding grooves and used for closing or opening the air outlet (10), a moving block III (31) which is arranged on the blocking plate III (27) and far away from one side of the air outlet (10), a threaded rod III (28) which penetrates through the moving block III (31), and a motor III (29) which is positioned in the air exhaust chamber (11), wherein two ends of the threaded rod III (28) are rotatably connected with the cabinet body (1) and are in threaded connection with the moving block III (31); the output end of the motor III (29) is in transmission connection with the threaded rod III (28).

5. A moisture-proof high-voltage switchgear cabinet as claimed in claim 1, characterized in that: filter screens are embedded at the air inlet (9), the air outlet (10) and the air outlet III (22), a plurality of drying agent plates (17) are arranged, and the drying agent plates (17) are connected to the grooves in the second air duct (8) in a sliding manner; the outside of the cabinet body (1) is located the air intake (9) and air exit (10) department all is provided with rain-proof cover.

6. A moisture-proof high-voltage switchgear cabinet as claimed in claim 1, characterized in that: at least two baffling baffles (16) are arranged at positions, which are positioned below the air inlet (9) in the first air duct (7) and between the exhaust fan (32) and the air outlet (10) in the exhaust chamber (11); baffle plates (16) in the first air channel (7) are alternately arranged on the side wall of the cabinet body (1) and the vertical plate (4), and a gap for accommodating air flow to pass is formed between the free end of the baffle plate (16) and the side wall of the first air channel (7); baffle plates (16) in the exhaust chamber (11) are alternately arranged on the right partition plate (3) and the side wall of the cabinet body (1), and a gap for accommodating airflow to pass is arranged between the free ends of the baffle plates (16) and the side wall of the exhaust chamber (11); the baffle (16) is inclined downwards from the fixed end to the free end.

7. A moisture-proof high-voltage switchgear cabinet as claimed in claim 1, characterized in that: the indoor below that is located vertical plate (4) of moisture absorption and the bottom of room (11) of airing exhaust all is provided with baffle (25) of two slopes that gather together to the centre, just the middle lowest department of moisture absorption room the middle lowest department of room (11) of airing exhaust all is provided with blow off pipe (26) that extend to the cabinet body (1) outer.

8. A moisture-proof high-voltage switchgear cabinet as claimed in claim 4, characterized in that: a temperature sensor, a first humidity sensor and a controller are arranged in the element chamber (6), and a second humidity sensor for detecting the external environment is arranged outside the cabinet body (1); the temperature sensor, the first humidity sensor and the second humidity sensor are connected with the controller, and the controller is connected with the first motor (15), the second motor (23), the third motor (29), the exhaust fan (24) and the exhaust fan (32).