Stay cable anchoring section dehumidification system

Abstract

The invention discloses a dehumidification system for an anchoring section of a stay cable, belongs to the technical field of stay cable dehumidification, and solves the technical problem that an existing dehumidification scheme cannot dehumidify the interior of an embedded pipe. The dehumidification system comprises a stay cable, a connecting piece, a sleeve, a waterproof cover, a control module and a dehumidification device, the lower end of the sleeve is connected with the connecting piece, the stay cable penetrates through the sleeve and is anchored to the connecting piece, the waterproof cover is installed at the joint of the upper end of the sleeve and the stay cable, the connecting piece is of a hollow sealing structure, and a first air port is formed in the lower end of the connecting piece; the upper end of the sleeve is provided with a second air port, the second air port is provided with a second electromagnetic valve, the sleeve is provided with a water pumping port, the water pumping port is provided with a water pumping electromagnetic valve, and the dehumidification device is connected with the water pumping port and used for pumping accumulated water. The dehumidification device can extract accumulated water in the sleeve and dehumidify the interior of the connecting piece and the interior of the sleeve at the same time, and the service life of the inhaul cable body and the service life of the anchoring part are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of cable dehumidification, and more particularly to a dehumidification system for an anchoring section of an inclined cable. Background Art

[0002] Dehumidification of bridge cables is an important task in the daily maintenance of bridge cables. It is to reduce the corrosion of the cable body and anchoring components caused by accumulated water or water vapor, and to ensure the working life of the cables.

[0003] Patent publication CN117348621A discloses an automatic humidity control system for the anchoring area of a bridge cable and its working method. Integrated dehumidification devices are respectively set in the waterproof cover and the protective cover. The temperature, humidity and water accumulation in the waterproof cover and the protective cover are monitored in real time through an intelligent control module. The waterproof cover and the protective cover are then dehumidified through the dehumidification device based on the monitoring data to reduce the accumulation of water or water vapor entering the anchoring area.

[0004] However, if only dehumidification is performed within the waterproof and protective covers, moisture will accumulate within the pre-buried pipes over time, leading to increasing humidity and even water accumulation, which can affect the service life of the cable body and anchoring components. In existing stay cables, water easily accumulates at the point where the sleeve bottom meets the connector, and this water cannot be drained through the drain holes. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and the purpose of the present invention is to provide a dehumidification system for the anchoring section of a stay cable.

[0006] The technical solution of the present invention is: a dehumidification system for the anchor section of a cable-stayed cable, comprising a cable-stayed cable, a connector, a sleeve, and a waterproof cover, the lower end of the sleeve being connected to the connector, the cable-stayed cable passing through the sleeve and anchored to the connector, the waterproof cover being installed at the connection between the upper end of the sleeve and the cable-stayed cable, and also comprising a control module and a dehumidification device, the connector being a hollow sealing structure, the lower end of the connector being provided with a first air port, the first air port being provided with a first solenoid valve, the upper end of the sleeve being provided with a second air port, the second air port being provided with a second solenoid valve, a water pumping port being provided at the connection between the sleeve and the connector, the water pumping port being provided with a water pumping solenoid valve, the dehumidification device being connected to the water pumping port for pumping out accumulated water, the control module being electrically connected to the dehumidification device, the first solenoid valve, the second solenoid valve, and the water pumping solenoid valve; the dehumidification device dehumidifies through the first air port, or the generated hot air enters the upper end of the sleeve from the second air port and moves downward into the connector, and then is discharged from the first air port.

[0007] As a further improvement, the dehumidification device includes a shell, the control module is installed in the shell, and the shell is respectively provided with an air pump, a water pump, a ventilation module, a refrigeration material, and a heat exchanger. The bottom wall of the shell is provided with a condensate receiving pan, the bottom of the shell is provided with a wiring head and a drain outlet connected to the condensate receiving pan, and the top of the shell is provided with an air outlet connector connected to the air pump, a water suction connector connected to the water pump, and an air inlet connector connected to the ventilation module. The air inlet connector is connected to the first air port through the main ventilation pipe, the air outlet connector is connected to the second air port through a secondary pipeline, and the water suction connector is connected to the water suction port through the water suction main pipe.

[0008] Furthermore, the refrigeration material is located directly below the air outlet of the ventilation module, and the radiator of the refrigeration material is in contact with the side wall of the shell.

[0009] Furthermore, the air intake connector is provided with a three-way solenoid valve, the shell side wall on one side of the heat exchanger is provided with an air intake solenoid valve, and the control module is electrically connected to the three-way solenoid valve and the air intake solenoid valve.

[0010] Furthermore, the inner cavity of the connecting piece is provided with a first sensor module for detecting temperature, humidity and water accumulation, and the control module is electrically connected to the first sensor module.

[0011] Furthermore, a second sensor module for detecting temperature and humidity is provided in the sleeve, and the control module is electrically connected to the second sensor module.

[0012] Furthermore, third sensor modules for detecting temperature and humidity are provided at both upper and lower ends of the sleeve, and the control module is electrically connected to the third sensor module.

[0013] Furthermore, the control strategy of the dehumidification system includes:

[0014] An active temperature and humidity control strategy monitors the temperature and humidity inside the connector or the sleeve in real time, and the control module dynamically adjusts the dehumidification power of the dehumidification device according to the dew point inside the connector or the sleeve;

[0015] A timed passive control strategy is used, wherein a dehumidification time period is preset, and the control module starts and stops the dehumidification device according to the dehumidification time period;

[0016] External command control strategy, sending MQTT instructions through the cloud or sending IO signals through physical buttons to the control module to force the dehumidification device to start and stop;

[0017] The threshold trigger control strategy is as follows: when the humidity RH inside the connector or the sleeve is greater than the set value, the control module starts the dehumidification device; when the humidity RH inside the connector and the sleeve is less than the set value minus the hysteresis amount, the control module stops the dehumidification device.

[0018] Furthermore, the process of starting the dehumidification device is as follows: when the dehumidification device starts working, water is first pumped out through the water pumping port. When it is detected that there is no water to be pumped out, the connector and the sleeve are dehumidified until the humidity RH in the connector and the sleeve meets the requirements.

[0019] Furthermore, the dehumidification process includes three modes:

[0020] Mode 1: When the temperature of the wet air reaches the set temperature, the wet air in the connector is extracted by the ventilation module, condensed water and dry air are obtained through the refrigerant, and the dry air is returned to the sleeve by the air pump to achieve circulation;

[0021] Mode 2: When the temperature of the wet air is lower than the set temperature and the external humidity reaches the set humidity, the wet air in the connector is extracted by the ventilation module, the wet air is heated by the heat exchanger, and the hot wet air is returned to the sleeve by the air pump to achieve circulation. When the temperature of the wet air in the connector reaches the set temperature, the heat exchanger stops working, condensed water and dry gas are obtained by the refrigerant, and the dry gas is returned to the sleeve by the air pump to achieve circulation.

[0022] Mode three, when the temperature of the moisture is lower than the set temperature and the external humidity is lower than the set humidity, the air is heated by the heat exchanger to obtain hot air, and the hot air is sent back to the sleeve through the air pump to discharge the moisture in the sleeve and the connector.

[0023] Beneficial effects

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The dehumidification device of the present invention can extract accumulated water from the sleeve through the first air port, or generate hot air that flows upward from the lower end of the connector into the sleeve and is discharged through the second air port. This can simultaneously dehumidify the connector and the sleeve, ensuring the service life of the cable body and anchoring components.

[0026] 2. The present invention solves the problems of water seepage, accumulation and moisture without destroying the sealing of the anchoring area through the intelligent control of the solenoid valve.

[0027] 3. Compared with other opening methods, the stable dry air or heated air of the present invention can accelerate the dehumidification effect, reduce energy consumption, have a shorter dehumidification time and better dehumidification effect, and reduce the corrosion of the cable body and anchor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the first air port, the second air port, and the water pumping port in the present invention;

[0030] Figure 3 This is a schematic diagram of the installation of the first sensor module and the second sensor module in the present invention;

[0031] Figure 4 Schematic diagram of the installation of the third sensor module in the present invention;

[0032] Figure 5 Schematic diagram of the structure of the dehumidification device of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the sleeve in the present invention.

[0034] Among them: 1- inclined cable, 2- connecting piece, 3- sleeve, 4- waterproof cover, 5- control module, 6- dehumidification device, 7- first air port, 8- first solenoid valve, 9- second air port, 10- second solenoid valve, 11- water pumping port, 12- water pumping solenoid valve, 13- shell, 14- air pump, 15- water pump, 16- ventilation module, 17- refrigeration material, 18- heat exchanger, 19- condensate receiving tray, 20- terminal, 21- drain port, 22- air outlet connector, 23- water pumping connector, 24- air inlet connector, 25- main ventilation pipe, 26- secondary pipeline, 27- water pumping main pipe, 28- radiator, 29- three-way solenoid valve, 30- air inlet solenoid valve, 31- first sensor module, 32- second sensor module, 33- third sensor module. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0036] See Figures 1 to 6A dehumidification system for the anchoring section of a cable-stayed cable comprises a cable-stayed cable 1, a connector 2, a sleeve 3, and a waterproof cover 4. The lower end of the sleeve 3 is connected to the connector 2, the cable-stayed cable 1 passes through the sleeve 3 and is anchored to the connector 2, and the waterproof cover 4 is installed at the connection between the upper end of the sleeve 3 and the cable-stayed cable 1. The dehumidification system also includes a control module 5 and a dehumidification device 6. The connector 2 is a hollow, sealed structure. The lower end of the connector 2 is provided with a first air port 7, which is provided with a first solenoid valve 8. The upper end of the sleeve 3 is provided with a second air port 9, which is provided with a second solenoid valve 10. A water extraction port 11 is provided at the connection between the sleeve 3 and the connector 2, which is provided with a water extraction solenoid valve 12. The dehumidification device 6 is connected to the water extraction port 11 for extracting accumulated water. The control module 5 is electrically connected to the dehumidification device 6, the first solenoid valve 8, the second solenoid valve 10, and the water extraction solenoid valve 12. The dehumidification device 6 dehumidifies through the first air port 7 , or the generated hot air enters the upper end of the sleeve 3 from the second air port 9 and moves downward into the connecting member 2 and is then discharged from the first air port 7 .

[0037] Specifically, the dehumidification device 6 includes a shell 13, and the control module 5 is installed in the shell 13. The shell 13 is respectively provided with an air pump 14, a water pump 15, a ventilation module 16, a refrigerant material 17, and a heat exchanger 18. The bottom wall of the shell 13 is provided with a condensate receiving pan 19, and the bottom of the shell 13 is provided with a terminal 20 and a drain outlet 21 connected to the condensate receiving pan 19. The terminal 20 is used to connect the sensor signal or power supply. The top of the shell 13 is provided with an air outlet connector 22 connected to the air pump 14, a water pumping connector 23 connected to the water pump 15, and an air inlet connector 24 connected to the ventilation module 16. The air inlet connector 24 is connected to the first air port 7 through the main ventilation pipe 25, the air outlet connector 22 is connected to the second air port 9 through the secondary pipe 26, and the water pumping connector 23 is connected to the water pumping port 11 through the water pumping main pipe 27. That is, one dehumidifier 6 can simultaneously pump water and dehumidify the sleeves 3 of multiple cables, facilitating centralized control and avoiding the high cost of equipping each cable with a dehumidifier 6. The refrigeration material 17 is, for example, a semiconductor refrigeration sheet.

[0038] The refrigeration material 17 is located directly below the air outlet of the ventilation module 16. The radiator 28 of the refrigeration material 17 contacts the side wall of the shell 13 to achieve better heat dissipation. The shell 13 is made of metal.

[0039] Furthermore, the air intake connector 24 is provided with a three-way solenoid valve 29 , and the side wall of the shell 13 on one side of the heat exchanger 18 is provided with an air intake solenoid valve 30 . The control module 5 is electrically connected to the three-way solenoid valve 29 and the air intake solenoid valve 30 .

[0040] In one embodiment, the inner cavity of the connector 2 is provided with a first sensor module 31 for detecting temperature, humidity, and water accumulation, and the control module 5 is electrically connected to the first sensor module 31. That is, the first sensor module 31 integrates a temperature and humidity sensor and a water accumulation sensor. The control module 5 obtains the temperature, humidity, and water accumulation in the inner cavity of the connector 2 through the first sensor module 31. When it is detected that the humidity is greater than a set value or water accumulation occurs, the control module 5 controls the first solenoid valve 8, the second solenoid valve 10, the water pumping solenoid valve 12, and the dehumidification device 6 to operate for dehumidification, thereby realizing intelligent dehumidification.

[0041] Furthermore, a second sensor module 32 for detecting temperature and humidity is provided within the sleeve 3, and the control module 5 is electrically connected to the second sensor module 32. The control module 5 obtains the temperature and humidity within the sleeve 3 through the second sensor module 32. When the humidity is detected to be greater than a set value, the control module 5 controls the first solenoid valve 8, the second solenoid valve 10, the pumping solenoid valve 12, and the dehumidification device 6 to operate to dehumidify. Simultaneously detecting the temperature and humidity within the inner cavity of the connector 2 and the sleeve 3 can achieve more effective dehumidification. The temperature and humidity within the inner cavity of the connector 2 and the sleeve 3 can be remotely monitored by the host computer.

[0042] In one embodiment, third sensor modules 33 for detecting temperature and humidity are provided at both the upper and lower ends of the sleeve 3, and the control module 5 is electrically connected to the third sensor modules 33. This configuration is suitable for longer sleeves 3, as the third sensor modules 33 at both ends can fully detect the temperature and humidity within the sleeve 3, thereby improving dehumidification accuracy.

[0043] Of course, in other embodiments, the first sensor module 31 , the second sensor module 32 and the third sensor module 33 may also send detection data to the control module 5 wirelessly.

[0044] The lower end of the sleeve 3 is provided with a folded plate 34, which is welded to the connector 2 to achieve a sealed connection between the sleeve 3 and the connector 2. The outer wall of the upper end of the sleeve 3 is provided with an annular step 35, and the lower end of the waterproof cover 4 is buckled onto the bottom surface of the annular step 35. A sealing material is provided between the waterproof cover 4 and the annular step 35, so that the contact area between the waterproof cover 4 and the annular step 35 is large and the sealing performance is good.

[0045] Since the inclined cable 1 is inclined, the accumulated water cannot normally flow into the connector 2 through the drain trough, so the accumulated water in the sleeve 3 needs to be pumped out, and the sleeve 3 needs to ensure that the water extraction port 11 is at the lowest point during the installation process.

[0046] The control strategy of the dehumidification system includes:

[0047] Active temperature and humidity control strategy: real-time monitoring of the temperature and humidity inside the connector 2 or the sleeve 3. The control module 5 dynamically adjusts the dehumidification power of the dehumidification device 6 according to the dew point inside the connector 2 or the sleeve 3. That is, the higher the humidity, the greater the dehumidification power, such as increasing the power of the refrigerant 17 to achieve faster dehumidification.

[0048] The timing passive control strategy presets the dehumidification time period, and the control module 5 starts and stops the dehumidification device 6 according to the dehumidification time period, such as the dehumidification device 6 runs for 15 minutes every 2 hours;

[0049] External command control strategy, sending MQTT instructions through the cloud or sending IO signals to the control module 5 via physical buttons to force the dehumidification device 6 to start and stop. That is, when the maintenance personnel determine that dehumidification is needed based on the detection data, they can directly control the dehumidification device 6 to work;

[0050] The threshold trigger control strategy is as follows: when the humidity RH inside the connector 2 or the sleeve 3 is greater than the set value, the control module 5 starts the dehumidification device 6; when the humidity RH inside the connector 2 and the sleeve 3 is less than the set value minus the hysteresis, the control module 5 stops the dehumidification device 6, which can reduce the frequent start-up of the dehumidification device 6; if the set value is 60% RH, the hysteresis is 10% to 15% RH.

[0051] The dehumidifier 6 starts operating as follows: When the dehumidifier 6 starts operating, it first pumps water through the water outlet 11. That is, the accumulated water is pumped to the condensate receiving pan 19 by the water pump 15 and then discharged from the drain outlet 21. When it is detected that there is no more water to be pumped, the connector 2 and sleeve 3 are dehumidified until the humidity RH inside the connector 2 and sleeve 3 meets the requirements. This ensures that there is no water accumulated in the sleeve 3, and the humidity RH inside the connector 2 and sleeve 3 meets the requirements, thereby ensuring the service life of the cable.

[0052] When dehumidification is not required, the control module 5 controls the first solenoid valve 8, the second solenoid valve 10 and the water pumping solenoid valve 12 to close, and the dehumidification device 6 does not work to reduce moisture or accumulated water from entering the connector 2 and the sleeve 3.

[0053] The dehumidification process includes three modes:

[0054] Mode 1: When the temperature of the wet air reaches the set temperature, the control module 5 controls the first solenoid valve 8 and the second solenoid valve 10 to open, and the wet air in the connector 2 is extracted through the ventilation module 16 (e.g., the ventilation module 16 is an exhaust fan), and condensed water and dry gas are obtained through the refrigerant 17. The condensed water falls into the condensed water receiving pan 19 and is discharged from the drain port 21. The dry gas is returned to the sleeve 3 through the air pump 14 to complete the circulation.

[0055] Mode 2: When the temperature of the moisture is lower than the set temperature and the external humidity reaches the set humidity, the control module 5 controls the first solenoid valve 8 and the second solenoid valve 10 to open, and the moisture in the connector 2 is extracted through the ventilation module 16, and the moisture is heated by the heat exchanger 18 (for example, the heat exchanger 18 is an electric heating wire), and the hot moisture is returned to the sleeve 3 through the air pump 14 to realize circulation until the temperature of the moisture in the connector 2 reaches the set temperature (to prevent the moisture temperature from being too low and the dehumidification effect from being poor). The heat exchanger 18 stops working, and condensed water and dry gas are obtained through the refrigerant 17. The dry gas is returned to the sleeve 3 through the air pump 14 to realize circulation;

[0056] Mode three, when the temperature of the moisture is lower than the set temperature and the external humidity is lower than the set humidity (that is, the humidity inside the connector 2 is higher and the humidity outside is lower), the control module 5 controls the first solenoid valve 8 and the second solenoid valve 10 to open, and the three-way solenoid valve 29 is switched to discharge the gas, the air intake solenoid valve 30 is opened, and the air is heated by the heat exchanger 18 to obtain hot air, and the hot air is sent back to the sleeve 3 through the air pump 14 to discharge the moisture in the sleeve 3 and the connector 2.

[0057] Among them, the set temperature and set humidity are calibrated according to actual working conditions.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A dehumidification system for an inclined cable anchoring section, comprising an inclined cable (1), a connector (2), a sleeve (3), and a waterproof cover (4), wherein the lower end of the sleeve (3) is connected to the connector (2), the inclined cable (1) passes through the sleeve (3) and is anchored to the connector (2), and the waterproof cover (4) is installed at the connection between the upper end of the sleeve (3) and the inclined cable (1), characterized in that: The invention also includes a control module (5) and a dehumidification device (6). The connecting member (2) is a hollow sealing structure. The lower end of the connecting member (2) is provided with a first air port (7), and the first air port (7) is provided with a first electromagnetic valve (8). The upper end of the sleeve (3) is provided with a second air port (9), and the second air port (9) is provided with a second electromagnetic valve (10). The connection between the sleeve (3) and the connecting member (2) is provided with a water pumping port (11), and the water pumping port (11) is provided with a water pumping electromagnetic valve ( 12), the dehumidification device (6) is connected to the water extraction port (11) for extracting accumulated water, and the control module (5) is electrically connected to the dehumidification device (6), the first solenoid valve (8), the second solenoid valve (10) and the water extraction solenoid valve (12); the dehumidification device (6) dehumidifies through the first air port (7), or the generated hot air enters the upper end of the sleeve (3) from the second air port (9) and moves downward into the connecting member (2), and is then discharged from the first air port (7).

2. A stay cable anchorage section dehumidification system according to claim 1, characterized in that: The dehumidification device (6) includes a housing (13), the control module (5) is installed in the housing (13), an air pump (14), a water pump (15), a ventilation module (16), a refrigeration material (17), and a heat exchanger (18) are respectively provided in the housing (13), a condensate receiving pan (19) is provided on the bottom wall of the housing (13), a terminal (20) and a drain port (21) connected to the condensate receiving pan (19) are provided at the bottom of the housing (13), and the housing The top of (13) is provided with an air outlet joint (22) connected to the air pump (14), a water pumping joint (23) connected to the water pump (15), and an air inlet joint (24) connected to the ventilation module (16); the air inlet joint (24) is connected to the first air port (7) through a main ventilation pipe (25); the air outlet joint (22) is connected to the second air port (9) through a secondary pipe (26); and the water pumping joint (23) is connected to the water pumping port (11) through a water pumping main pipe (27).

3. A stay cable anchor section dehumidification system according to claim 2, characterized in that: The refrigeration material (17) is located directly below the air outlet of the ventilation module (16), and the heat sink (28) of the refrigeration material (17) is in contact with the side wall of the shell (13).

4. The dehumidification system for the anchoring section of the stayed cable according to claim 2, characterized in that: The air intake connector (24) is provided with a three-way solenoid valve (29), a side wall of the housing (13) on one side of the heat exchanger (18) is provided with an air intake solenoid valve (30), and the control module (5) is electrically connected to the three-way solenoid valve (29) and the air intake solenoid valve (30).

5. A stay cable anchorage section dehumidification system according to any one of claims 1 to 4, characterized in that: The inner cavity of the connecting member (2) is provided with a first sensor module (31) for detecting temperature, humidity and accumulated water, and the control module (5) is electrically connected to the first sensor module (31).

6. A stay cable anchorage section dehumidification system according to claim 5, characterized in that: A second sensor module (32) for detecting temperature and humidity is provided in the sleeve (3), and the control module (5) is electrically connected to the second sensor module (32).

7. A stay cable anchorage section dehumidification system according to any one of claims 1 to 4, characterized in that: A third sensor module (33) for detecting temperature and humidity is provided at both upper and lower ends of the sleeve (3), and the control module (5) is electrically connected to the third sensor module (33).

8. The dehumidification system for the anchoring section of the stayed cable according to claim 2, characterized in that: The control strategy of the dehumidification system includes: An active temperature and humidity measurement control strategy monitors the temperature and humidity in the connector (2) or the sleeve (3) in real time, and the control module (5) dynamically adjusts the dehumidification power of the dehumidification device (6) according to the dew point in the connector (2) or the sleeve (3); A timed passive control strategy is used, wherein a dehumidification time period is preset, and the control module (5) starts and stops the dehumidification device (6) according to the dehumidification time period; An external command control strategy, sending an MQTT command via the cloud or an IO signal via a physical button to the control module (5) to forcibly start or stop the dehumidification device (6); A threshold trigger control strategy is provided, wherein when the humidity RH in the connecting member (2) or the sleeve (3) is greater than a set value, the control module (5) starts the dehumidification device (6); when the humidity RH in the connecting member (2) and the sleeve (3) is less than the set value minus the hysteresis amount, the control module (5) stops the dehumidification device (6).

9. The dehumidification system for the anchoring section of the stayed cable according to claim 8, characterized in that: The process of starting the dehumidification device (6) is as follows: when the dehumidification device (6) starts working, water is first pumped out through the water pumping port (11); when it is detected that there is no water to be pumped out, the connecting piece (2) and the sleeve (3) are dehumidified until the humidity RH in the connecting piece (2) and the sleeve (3) meets the requirements.

10. The stay cable anchorage section dehumidification system according to claim 8, characterized in that: The dehumidification process includes three modes: Mode 1: When the temperature of the wet air reaches the set temperature, the wet air in the connecting member (2) is extracted through the ventilation module (16), condensed water and dry air are obtained through the refrigerant (17), and the dry air is returned to the sleeve (3) through the air pump (14) to realize circulation; Mode 2: When the temperature of the wet air is lower than the set temperature and the external humidity reaches the set humidity, the wet air in the connecting piece (2) is extracted through the ventilation module (16), the wet air is heated through the heat exchanger (18), and the hot wet air is returned to the sleeve (3) through the air pump (14) to realize circulation. When the temperature of the wet air in the connecting piece (2) reaches the set temperature, the heat exchanger (18) stops working, condensed water and dry gas are obtained through the refrigerant (17), and the dry gas is returned to the sleeve (3) through the air pump (14) to realize circulation. Mode three: when the temperature of the moisture is lower than the set temperature and the external humidity is lower than the set humidity, the air is heated by the heat exchanger (18) to obtain hot air, and the hot air is sent back to the sleeve (3) through the air pump (14) to discharge the moisture in the sleeve (3) and the connector (2).

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