CN214746782U

CN214746782U - Drying system for pulsating vacuum cleaning sterilizer

Info

Publication number: CN214746782U
Application number: CN202120685682.XU
Authority: CN
Inventors: 吕志明; 张龙龙; 许征文; 陈琨; 赵润; 韩宝林
Original assignee: Shinva Medical Instrument Co Ltd
Current assignee: Shinva Medical Instrument Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-16
Anticipated expiration: 2031-04-02

Abstract

The utility model belongs to the technical field of drying of a pulsating vacuum cleaning sterilizer, and relates to a drying system for the pulsating vacuum cleaning sterilizer, which is installed and connected with a cabin body, and comprises a heat preservation layer arranged at the periphery of the cabin body, a cabin body interlayer is arranged between the heat preservation layer and a cabin body shell, a steam input unit is arranged at the periphery of the heat preservation layer, and the steam input unit is communicated with the cabin body interlayer; the periphery of the heat preservation layer is also provided with a hot air drying unit and a vacuum unit which are respectively communicated with the interior of the cabin body. The utility model discloses synthesize three kinds of modes of intermediate layer heat radiation, vacuum drying and hot air drying, can be that the medical instrument drying in the cabin body is more thorough to it is few to use time, the energy can be saved.

Description

Drying system for pulsating vacuum cleaning sterilizer

Technical Field

The utility model relates to a drying system for pulsation vacuum cleaning sterilizer belongs to the drying technology field of pulsation vacuum cleaning sterilizer.

Background

With the continuous development of the medical level, various complex specialized instruments and precise instruments are washed more and more, and the adoption of a proper method for ensuring the cleaning quality of the medical instruments is particularly important. The pulsating vacuum cleaning sterilizer is a device which can be used for cleaning, sterilizing, drying and the like of endoscope instruments, lumen instruments, basic surgical instruments, orthopedic instruments, anesthesia instruments, dental hand instruments, ophthalmic instruments and external instruments.

The pulsating vacuum cleaning sterilizer is a soaking type cleaning device, and the main working procedures are cleaning, rinsing, sterilizing and drying. Medical instruments treated by the pulsating vacuum cleaning sterilizer need to be put into a sterilization cabinet for sterilization, and if the medical instruments treated by the pulsating vacuum cleaning sterilizer are not dry enough, failure of sterilization is easily caused. Various drying cabinets for drying medical instruments in the market at present mostly dry the medical instruments through hot air, the whole temperature in a cabin body can be raised only after a long time, the wind speed of a fan is difficult to control, a lot of heat is easy to take away, energy is wasted, and the time for using is long; the vacuum drying cabinet of the existing vacuum technology is difficult to provide a stable heat source, a vacuum system easily takes away much heat, and the drying time is also long.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the drying system for the pulsating vacuum cleaning sterilizer integrates three modes of interlayer heat radiation, vacuum drying and hot air drying, can dry medical instruments in a cabin more thoroughly, consumes less time and saves energy.

The drying system for the pulsating vacuum cleaning sterilizer is installed and connected with a cabin body, and comprises a heat preservation layer arranged at the periphery of the cabin body, a cabin body interlayer is arranged between the heat preservation layer and a cabin body shell, a steam input unit is arranged at the periphery of the heat preservation layer, and the steam input unit is communicated with the cabin body interlayer; the periphery of the heat preservation layer is also provided with a hot air drying unit and a vacuum unit which are respectively communicated with the interior of the cabin body.

After the medical instruments in the cabin body are cleaned, the drying system starts to work; firstly, pumping accumulated water in a cabin body by a vacuum unit, and introducing high-pressure steam into an interlayer of the cabin body through a steam input unit to provide a stable heat source for the cabin body; then, vacuum drying is carried out, the vacuum unit continuously pumps out air in the cabin body, meanwhile, by utilizing a stable heat source of an interlayer of the cabin body and a physical principle that the boiling point of water is reduced under negative pressure, most of water in the cabin body reaches the boiling point and is gasified, the gasified water is also taken away by the vacuum unit and is finally discharged into a drainage pipeline of the cabin body, and the vacuum drying mainly carries out drying on water in the lumen instrument; then hot air drying is carried out, high-temperature gas is introduced into the cabin body by utilizing a hot air drying unit, and the drying is mainly carried out on the surface of the medical appliance; and then the vacuum unit and the hot air drying unit work again to dry the medical instrument once or twice, so that a good effect can be achieved. The cabin body is connected with other cleaning pipelines, and the drainage pipeline is one part of the cabin body cleaning pipeline.

Preferably, the vacuum unit comprises a vacuum pump, an inlet of the vacuum pump is communicated with an outlet of a heat exchanger cooling pipeline through a vacuum pumping pipe, an inlet of the heat exchanger cooling pipeline is communicated with the top end and the bottom end of the cabin body through a gas phase pipe and a liquid phase pipe respectively, and the gas phase pipe and the liquid phase pipe are provided with a gas phase evacuation valve and a liquid phase evacuation valve respectively; the inlet and the outlet of the heat exchanger heating pipeline are respectively communicated with one ends of a water inlet pipe and a water outlet pipe, and the other end of the water outlet pipe is communicated with a drainage pipeline of the cabin body; a water inlet filter is arranged on the water inlet pipe, a heat exchanger water inlet valve is arranged between the water inlet filter and the heat exchanger, a pipeline between the heat exchanger water inlet valve and the water inlet filter is communicated with a vacuum pump through a vacuum pump cooling pipe, and the vacuum pump water inlet valve is arranged on the vacuum pump cooling pipe; the outlet of the vacuum pump is communicated with a drainage pipeline of the cabin body through a vacuum pump drainage pipe, and a vacuum drainage check valve is arranged on the vacuum pump drainage pipe. After the medical instruments in the cabin are cleaned, the vacuum pump pumps the accumulated water in the cabin from the bottom of the cabin through the heat exchanger, the liquid phase pipe and the opened liquid phase evacuation valve, and at the moment, the gas phase evacuation valve is in a closed state; when the water in the cabin body is dried, the vacuum pump pumps air in the cabin body from the top of the cabin body through the heat exchanger, the gas phase pipe and the opened gas phase evacuation valve, so that the pressure in the cabin body is reduced to be below-85 kpa and maintained for a period of time, at the moment, most of water in the cabin body reaches a boiling point and is gasified by utilizing a stable heat source of an interlayer of the cabin body and a physical principle that the boiling point of water is reduced under negative pressure, and the gasified water is pumped out by the vacuum pump and is discharged into a drainage pipeline; and an external water source enters the water inlet pipe through the water inlet filter and is divided into two paths, one path enters the heat exchanger heating pipeline through the water inlet valve of the heat exchanger to serve as a heat exchange medium of the heat exchanger, the superheated gas pumped out in the drying stage is prevented from damaging the vacuum pump, and the other path enters the vacuum pump through the water inlet valve of the vacuum pump to serve as a working medium of the vacuum pump.

Preferably, the hot air drying unit include hot air line, air cleaner and air heating box, hot air line exit end intercommunication cabin body is inside, hot air line entry end intercommunication air cleaner, the air heating box sets up on the hot air line between air cleaner and the cabin body, be equipped with the fan on the hot air line between air heating box and the air cleaner, be equipped with gaseous return air valve on the hot air line between air heating box and the cabin body, still be equipped with hot-blast temperature probe and wind pressure switch on the air heating box. When hot air is dried, the fan and the air heating box are both in a working state, external air enters the fan through the air filter, the fan guides the air into the top of the cabin body through the air heating box and the gas-phase return valve, and the hot air is finally guided into the air after being sufficiently circularly dried in the cabin body; when the fan and the air heating box are in an inoperative state, the gas-phase return valve is opened, and air can be poured into the cabin body after passing through the air filter and the gas-phase return valve, so that the cabin body is changed from a vacuum state to a normal pressure state. The hot air temperature probe and the wind pressure switch can respectively detect the temperature and the pressure of the air input into the cabin body.

Preferably, the steam input unit comprises a steam inlet pipe, one end of the steam inlet pipe is communicated with the cabin interlayer, the other end of the steam inlet pipe is provided with an interlayer steam inlet filter, and an interlayer steam inlet valve is arranged on the steam inlet pipe between the interlayer steam inlet filter and the cabin interlayer; the steam inlet pipe between the interlayer steam inlet valve and the interlayer of the cabin body is communicated with one end of the steam air supply pipe, the other end of the steam air supply pipe is provided with a safety valve, and the steam air supply pipe between the safety valve and the steam inlet pipe is provided with an interlayer air supply one-way valve. Under normal conditions, high-pressure steam enters the interlayer of the cabin body through the steam inlet pipe, the interlayer steam inlet filter and the interlayer steam inlet valve; when the interlayer of the cabin body is cooled and negative pressure appears, air is supplemented through the interlayer air supplementing one-way valve.

Preferably, the cabin interlayer is communicated with one end of the drain pipe, the other end of the drain pipe is communicated with the drain pipeline of the cabin, the drain pipe is provided with an interlayer drain check valve, the drain pipe between the interlayer drain check valve and the cabin interlayer is provided with an interlayer steam outlet filter, and an interlayer drain valve is arranged between the interlayer steam outlet filter and the interlayer drain check valve. Steam in the interlayer of the cabin body is condensed into water which sequentially passes through the interlayer steam outlet filter, the interlayer drain valve and the interlayer drainage one-way valve and then enters a drainage pipeline of the pulsating vacuum cleaning sterilizer, so that the utilization rate of the steam is ensured.

Preferably, the interlayer of the cabin body is provided with an interlayer pressure transmitter; the cabin body is also provided with a cabin body temperature probe. The interlayer pressure transmitter and the cabin temperature probe respectively detect the pressure in the interlayer of the cabin and the temperature in the cabin.

Preferably, the water outlet pipe is also communicated with one end of the water collecting pipe, the other end of the water collecting pipe is communicated with the top of the cabin body, the water collecting box is arranged on the water collecting pipe, the air exhaust check valve is arranged between the water collecting box and the top of the cabin body, and the cabin body pressure transmitter is arranged between the air exhaust check valve and the water collecting box. When high-temperature gas is gradually led into the cabin body through the hot air pipeline, the cabin body pressure transmitter detects the pressure condition in the cabin body, when the pressure exceeds a limit value, the exhaust check valve is opened, hot air is exhausted, is condensed into water through the water collecting box, and finally flows into the drainage pipeline.

Compared with the prior art, the utility model beneficial effect who has is:

the utility model has the advantages of reasonable design, synthesize three kinds of modes of intermediate layer heat radiation, vacuum drying and hot air drying, can be that the medical instrument drying in the cabin body is more thorough to it is few with the time, the energy can be saved.

Drawings

FIG. 1 is a schematic diagram of a drying system for a pulsating vacuum cleaning sterilizer;

FIG. 2 is a schematic diagram of a drying system for a pulsating vacuum cleaning sterilizer;

fig. 3 is a partial structure diagram of a drying system for the pulsating vacuum cleaning sterilizer.

In the figure: 1. a heat-insulating layer; 2. a cabin body; 3. a steam air supplement pipe; 4. a hot air line; 5. a gas phase return air valve; 6. a cabin interlayer; 7. a hot air temperature probe; 8. a wind pressure switch; 9. an air heating box; 10. a fan; 11. an air filter; 12. an interlayer air supply one-way valve; 13. a safety valve; 14. an interlayer steam inlet valve; 15. an interlayer steam inlet filter; 16. a steam inlet pipe; 17. an interlayer pressure transmitter; 18. an air exhaust check valve; 19. a water collection box; 20. a cabin pressure transmitter; 21. a water collection pipe; 22. a gas phase pipe; 23. a gas phase evacuation valve; 24. a water inlet pipe; 25. a water inlet filter; 26. a heat exchanger; 27. a heat exchanger water inlet valve; 28. a liquid phase pipe; 29. a liquid phase evacuation valve; 30. vacuumizing a tube; 31. a vacuum pump water inlet valve; 32. a vacuum pump cooling pipe; 33. a water outlet pipe; 34. a cabin temperature probe; 35. a vacuum pump; 36. a vacuum pump drain pipe; 37. a vacuum drainage check valve; 38. an interlayer steam outlet filter; 39. an interlayer drain valve; 40. a sandwich hydrophobic check valve; 41. a drain pipe; 42. a drain line.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-3, the drying system for the pulsating vacuum cleaning sterilizer of the present invention is installed and connected with a cabin 2, and comprises a heat insulation layer 1 disposed at the periphery of the cabin 2, a cabin interlayer 6 disposed between the heat insulation layer 1 and the shell of the cabin 2, a steam input unit disposed at the periphery of the heat insulation layer 1, and the steam input unit communicated with the cabin interlayer 6; the periphery of the heat preservation layer 1 is also provided with a hot air drying unit and a vacuum unit which are respectively communicated with the interior of the cabin body 2.

In this embodiment:

the vacuum unit comprises a vacuum pump 35, the inlet of the vacuum pump 35 is communicated with the outlet of a cooling pipeline of the heat exchanger 26 through a vacuumizing pipe 30, the inlet of the cooling pipeline of the heat exchanger 26 is communicated with the top end and the bottom end of the cabin body 2 through a gas-phase pipe 22 and a liquid-phase pipe 28 respectively, and the gas-phase pipe 22 and the liquid-phase pipe 28 are provided with a gas-phase vacuumizing valve 23 and a liquid-phase vacuumizing valve 29 respectively; the inlet and the outlet of the heating pipeline of the heat exchanger 26 are respectively communicated with one ends of a water inlet pipe 24 and a water outlet pipe 33, and the other end of the water outlet pipe 33 is communicated with a drainage pipeline 42 of the cabin body 2; a water inlet filter 25 is arranged on the water inlet pipe 24, a heat exchanger water inlet valve 27 is arranged between the water inlet filter 25 and the heat exchanger 26, a pipeline between the heat exchanger water inlet valve 27 and the water inlet filter 25 is communicated with a vacuum pump 35 through a vacuum pump cooling pipe 32, and a vacuum pump water inlet valve 31 is arranged on the vacuum pump cooling pipe 32; the outlet of the vacuum pump 35 is communicated with a drain pipeline 42 of the chamber body 2 through a vacuum pump drain pipe 36, and a vacuum drain check valve 37 is arranged on the vacuum pump drain pipe 36.

The hot air drying unit comprises a hot air pipeline 4, an air filter 11 and an air heating box 9, the outlet end of the hot air pipeline 4 is communicated with the cabin body 2, the inlet end of the hot air pipeline 4 is communicated with the air filter 11, the air heating box 9 is arranged on the hot air pipeline 4 between the air filter 11 and the cabin body 2, a fan 10 is arranged on the hot air pipeline 4 between the air heating box 9 and the air filter 11, a gas phase air return valve 5 is arranged on the hot air pipeline 4 between the air heating box 9 and the cabin body 2, and a hot air temperature probe 7 and a wind pressure switch 8 are further arranged on the air heating box 9.

The steam input unit comprises a steam inlet pipe 16, one end of the steam inlet pipe 16 is communicated with the cabin interlayer 6, the other end of the steam inlet pipe is provided with an interlayer steam inlet filter 15, and an interlayer steam inlet valve 14 is arranged on the steam inlet pipe 16 between the interlayer steam inlet filter 15 and the cabin interlayer 6; a steam inlet pipe 16 between the interlayer steam inlet valve 14 and the cabin interlayer 6 is communicated with one end of the steam air supplement pipe 3, the other end of the steam air supplement pipe 3 is provided with a safety valve 13, and the steam air supplement pipe 3 between the safety valve 13 and the steam inlet pipe 16 is provided with an interlayer air supplement one-way valve 12. Under normal conditions, high-pressure steam enters the cabin interlayer 6 through the steam inlet pipe 16, the interlayer steam inlet filter 15 and the interlayer steam inlet valve 14; when the cabin interlayer 6 is cooled and generates negative pressure, air is supplemented through the interlayer air supplementing one-way valve 12.

The cabin interlayer 6 is communicated with one end of a drain pipe 41, the other end of the drain pipe 41 is communicated with a drain pipeline 42 of the cabin 2, an interlayer drain check valve 40 is arranged on the drain pipe 41, an interlayer steam outlet filter 38 is arranged on the drain pipe 41 between the interlayer drain check valve 40 and the cabin interlayer 6, and an interlayer drain valve 39 is arranged between the interlayer steam outlet filter 38 and the interlayer drain check valve 40. The steam in the cabin interlayer 6 is condensed into water which sequentially passes through the interlayer steam outlet filter 38, the interlayer drain valve 39 and the interlayer hydrophobic one-way valve 40 and then enters the drainage pipeline 42 of the pulsating vacuum cleaning sterilizer, so that the utilization rate of the steam is ensured.

The cabin interlayer 6 is provided with an interlayer pressure transmitter 17; the cabin 2 is also provided with a cabin temperature probe 34. The interlayer pressure transmitter 17 and the cabin temperature probe 34 detect the pressure in the cabin interlayer 6 and the temperature in the cabin 2, respectively.

The water outlet pipe 33 is also communicated with one end of the water collecting pipe 21, the other end of the water collecting pipe 21 is communicated with the top of the cabin body 2, the water collecting box 19 is arranged on the water collecting pipe 21, the air exhaust check valve 18 is arranged between the water collecting box 19 and the top of the cabin body 2, and the cabin body pressure transmitter 20 is arranged between the air exhaust check valve 18 and the water collecting box 19. When high-temperature gas is gradually led into the cabin body 2 through the hot air pipeline 4, the cabin body pressure transmitter 20 detects the pressure condition in the cabin body 2, when the pressure exceeds a limit value, the exhaust check valve 18 is opened, hot air is exhausted, is condensed into water through the water collecting box 19, and finally flows into the water drainage pipeline 42.

After the medical instruments in the cabin body 2 are cleaned, the drying system starts to work; firstly, the vacuum pump 35 pumps the accumulated water in the cabin 2 from the bottom of the cabin 2 through the heat exchanger 26, the liquid phase pipe 28 and the opened liquid phase evacuation valve 29, and the gas phase evacuation valve 23 is in a closed state; then the high-pressure steam enters the cabin interlayer 6 through the steam inlet pipe 16, the interlayer steam inlet filter 15 and the interlayer steam inlet valve 14 to provide a stable heat source for the cabin 2.

Then, vacuum drying is carried out, the vacuum pump 35 pumps out air in the cabin 2 from the top of the cabin 2 through the heat exchanger 26, the gas phase pipe 22 and the opened gas phase evacuation valve 23, so that the pressure in the cabin 2 is reduced to be below-85 kpa and maintained for a period of time, most of water in the cabin 2 reaches a boiling point and is gasified by utilizing a stable heat source of the cabin interlayer 6 and a physical principle that the boiling point of water is reduced under negative pressure, and the gasified water is pumped out by the vacuum pump 35 and is discharged into the drainage pipeline 42; external water enters the water inlet pipe 24 through the water inlet filter 25 and is divided into two paths, one path enters the temperature rising pipeline of the heat exchanger 26 through the water inlet valve 27 of the heat exchanger to serve as a heat exchange medium of the heat exchanger 26, the overheated gas pumped out in the drying stage is prevented from damaging the vacuum pump 35, the other path enters the vacuum pump 35 through the water inlet valve 31 of the vacuum pump to serve as a working medium of the vacuum pump 35, and the vacuum drying mainly dries moisture in the pipe cavity instrument.

And then, hot air drying is carried out, the fan 10 and the air heating box 9 are both in a working state, external air enters the fan 10 through the air filter 11, the fan 10 guides the air into the top of the cabin body 2 through the air heating box 9 and the gas phase return valve 5, after the hot air is sufficiently circulated and dried in the cabin body 2, hot air in the cabin body 2 is finally guided into the air through the exhaust one-way valve 18, and the drying is mainly aimed at the surface drying of medical instruments.

The vacuum unit and the hot air drying unit work again and repeatedly once or twice, so that the medical appliance can be dried with good effect. The tank 2 itself is connected to other cleaning lines and the water discharge line 42 is part of the cleaning lines of the tank 2.

Claims

1. The utility model provides a drying system for pulsation vacuum cleaning sterilizer, with cabin body (2) erection joint, its characterized in that: the heat preservation and insulation structure comprises a heat preservation layer (1) arranged on the periphery of a cabin body (2), a cabin body interlayer (6) is arranged between the heat preservation layer (1) and a shell of the cabin body (2), a steam input unit is arranged on the periphery of the heat preservation layer (1), and the steam input unit is communicated with the cabin body interlayer (6); the periphery of the heat-insulating layer (1) is also provided with a hot air drying unit and a vacuum unit which are respectively communicated with the interior of the cabin body (2).

2. The drying system for a pulsating vacuum cleaning and disinfecting device as recited in claim 1, wherein: the vacuum unit comprises a vacuum pump (35), an inlet of the vacuum pump (35) is communicated with an outlet of a cooling pipeline of the heat exchanger (26) through a vacuum pumping pipe (30), an inlet of the cooling pipeline of the heat exchanger (26) is communicated with the top end and the bottom end of the cabin body through a gas phase pipe (22) and a liquid phase pipe (28) respectively, and the gas phase pipe (22) and the liquid phase pipe (28) are provided with a gas phase vacuum pumping valve (23) and a liquid phase vacuum pumping valve (29) respectively; an inlet and an outlet of a heating pipeline of the heat exchanger (26) are respectively communicated with one ends of a water inlet pipe (24) and a water outlet pipe (33), and the other end of the water outlet pipe (33) is communicated with a drainage pipeline (42) of the cabin body (2); a water inlet filter (25) is arranged on the water inlet pipe (24), a heat exchanger water inlet valve (27) is arranged between the water inlet filter (25) and the heat exchanger (26), a pipeline between the heat exchanger water inlet valve (27) and the water inlet filter (25) is communicated with a vacuum pump (35) through a vacuum pump cooling pipe (32), and a vacuum pump water inlet valve (31) is arranged on the vacuum pump cooling pipe (32); the outlet of the vacuum pump (35) is communicated with a drainage pipeline (42) of the cabin body (2) through a vacuum pump drainage pipe (36), and a vacuum drainage one-way valve (37) is arranged on the vacuum pump drainage pipe (36).

3. The drying system for a pulsating vacuum cleaning and disinfecting device as recited in claim 1, wherein: the hot air drying unit comprises a hot air pipeline (4), an air filter (11) and an air heating box (9), the outlet end of the hot air pipeline (4) is communicated with the interior of the cabin body (2), the inlet end of the hot air pipeline (4) is communicated with the air filter (11), the air heating box (9) is arranged on the hot air pipeline (4) between the air filter (11) and the cabin body (2), a fan (10) is arranged on the hot air pipeline (4) between the air heating box (9) and the air filter (11), a gas phase return valve (5) is arranged on the hot air pipeline (4) between the air heating box (9) and the cabin body (2), and a hot air temperature probe (7) and a wind pressure switch (8) are further arranged on the air heating box (9).

4. The drying system for a pulsating vacuum cleaning and disinfecting device as recited in claim 1, wherein: the steam input unit comprises a steam inlet pipe (16), one end of the steam inlet pipe (16) is communicated with the cabin body interlayer (6), the other end of the steam inlet pipe is provided with an interlayer steam inlet filter (15), and an interlayer steam inlet valve (14) is arranged on the steam inlet pipe (16) between the interlayer steam inlet filter (15) and the cabin body interlayer (6); a steam inlet pipe (16) between the interlayer steam inlet valve (14) and the cabin interlayer (6) is communicated with one end of the steam air supplement pipe (3), the other end of the steam air supplement pipe (3) is provided with a safety valve (13), and the steam air supplement pipe (3) between the safety valve (13) and the steam inlet pipe (16) is provided with an interlayer air supplement one-way valve (12).

5. The drying system for a pulsating vacuum cleaning and disinfecting device as recited in claim 1, wherein: cabin body intermediate layer (6) intercommunication drain pipe (41) one end, drain pipe (41) other end intercommunication drain line (42) of cabin body (2) to be equipped with intermediate layer drainage check valve (40) on drain pipe (41), be equipped with intermediate layer play vapour filter (38) on drain pipe (41) between intermediate layer drainage check valve (40) and cabin body intermediate layer (6), be equipped with intermediate layer bleeder valve (39) between intermediate layer play vapour filter (38) and intermediate layer drainage check valve (40).

6. The drying system for a pulsating vacuum cleaning and disinfecting device as recited in claim 1, wherein: the cabin interlayer (6) is provided with an interlayer pressure transmitter (17); the cabin body is also provided with a cabin body temperature probe (34).

7. The drying system for a pulsating vacuum cleaning and disinfecting device as defined in claim 3, wherein: the water outlet pipe (33) is also communicated with one end of the water collecting pipe (21), the other end of the water collecting pipe (21) is communicated with the top of the cabin body (2), the water collecting box (19) is arranged on the water collecting pipe (21), an air exhaust check valve (18) is arranged between the water collecting box (19) and the top of the cabin body (2), and a cabin body pressure transmitter (20) is arranged between the air exhaust check valve (18) and the water collecting box (19).