CN108824552B - A silent air water maker for smart furniture based on the Internet of Things - Google Patents

Abstract

The invention relates to a silent air water maker for smart furniture based on the Internet of Things, comprising a main body, an air inlet arranged on one side of the main body and a water outlet arranged on the other side of the main body, and the main body is provided with Display screen, several indicator lights and several operation buttons, this IoT-based silent air water maker for smart furniture controls the opening and closing of the air inlet valve and the air outlet valve at the same time through the drive unit, which is convenient for the air to enter the air intake mechanism and then be discharged , Due to the use of driven gear drive connection, the air is free from noise pollution during the circulation process, ensuring a quiet environment for smart homes. Not only that, the second drive motor rotates the blades to generate airflow. Under the action of airflow centrifugal force, The impurities and harmful substances in the air are thrown out of the air flow center and adsorbed on the filter screen in the air purification pipe, so as to achieve the purpose of air purification and ensure the health of the generated water quality.

Description

A silent air water maker for smart furniture based on the Internet of Things

technical field

The invention relates to a silent air water maker for intelligent furniture based on the Internet of Things.

Background technique

The air water maker is a high-tech technology that uses air in various environments as the original raw material, and liquefies the air through air purification, air heating, air condensation, water purification and many other technical means, so as to obtain drinking water that meets hygienic standards. The product, air water maker is formed by integrating the principles of air dehumidifiers, air conditioners, air purifiers and many other equipment, and can be widely used in smart homes, public places or any place that requires drinking water.

When the air water maker is running, it mainly introduces air through the internal air intake mechanism to make water. However, the existing air intake mechanism usually adopts the method of fan exhaust air. Although the fan can meet the air intake demand during operation, it is In the process of work, it is easy to generate noise. In the smart furniture environment, people need a relatively quiet environment to relax. Obviously, the air water maker that produces noise pollution is easy to interfere with people's rest. Air purification works effectively, even if some equipments are equipped with air purification mechanism, but because the air is not in sufficient and effective contact with the filter screen, the air purification efficiency is reduced, resulting in a decrease in the water quality generated, making the air water machine practical. Decreased sex.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, a silent air water maker for smart furniture based on the Internet of Things is provided.

The technical solution adopted by the present invention to solve the technical problem is as follows: a silent air water maker for smart furniture based on the Internet of Things, comprising a main body, an air inlet arranged on one side of the main body, and an air inlet arranged on the other side of the main body. The water outlet of the main body is provided with a display screen, a number of indicator lights and a number of operation buttons;

The air inlet is provided with an air intake mechanism and an air purification mechanism, the air intake mechanism is connected with the air purification mechanism, and the air purification mechanism is connected with the main body;

The air intake mechanism includes a horizontally arranged air inlet pipe, a vertically arranged air outlet pipe, a vertically arranged air storage tank and a connecting pipe, the air outlet pipe and the air storage tank are both communicated with the air inlet pipe, and the air outlet pipe is connected by The pipe is communicated with the air storage tank, the air inlet pipe is provided with an air intake unit, the air outlet pipe is provided with an air outlet unit, the air storage tank is provided with a horizontally arranged piston, and the connecting pipe is provided with a drive unit, The drive unit is respectively connected with the air intake unit, the air outlet unit and the piston drive;

The intake unit includes a vertically arranged first moving block, a first transmission assembly and an intake valve, the first moving block is connected to the intake valve through the first transmission assembly, and the top end of the intake valve is connected to the intake valve. The top of the inner wall of the intake pipe is hinged;

The air outlet unit includes a horizontally arranged second moving block, a second transmission assembly and an air outlet valve, the second moving block is connected to the air outlet valve through the second transmission assembly, and one end of the air outlet valve is connected to one end of the inner wall of the air outlet pipe. hinged;

The drive unit includes a fixed rod, a first drive motor, a first drive shaft, a drive gear, a driven gear, a first eccentric shaft, a second eccentric shaft, a first connecting rod, a second connecting rod and a third connecting rod, The fixing rod is fixed on the inner wall of the connecting pipe, the first driving motor is fixed on the fixing rod, the first driving motor is drivingly connected with the first driving shaft, and the driving gear is fixed on the first driving shaft, The driven gear meshes with the drive gear, the first eccentric shaft is fixed on one side of the driven gear, the second eccentric shaft is fixed on the other side of the driven gear, and the driven gear passes through the first eccentric shaft. The eccentric shaft is hinged with the piston, the driven gear is hinged with the first moving block through the first eccentric shaft, and the driven gear is hinged with the second moving block through the second eccentric shaft;

The air purification mechanism includes a clean air pipe, a first air guide pipe arranged on one side of the clean air pipe, and a second air guide pipe arranged on the other side of the clean air pipe. The air outlet pipe is communicated with the clean air pipe through the first air guide pipe. The clean trachea is communicated with the inside of the main body through the second trachea;

A cleaning unit is arranged in the cleaning pipe, and the cleaning unit includes a second driving motor, a second driving shaft arranged horizontally, a filter screen and several blades. The vertical cross-section of the filter screen is annular, so The filter screen is fixed on the inner wall of the clean air pipe, the second drive motor is fixed on the end of the clean air pipe away from the second air guide pipe, the blades are evenly distributed on the outer circumference of the second drive shaft, and the second drive motor The motor is connected with the blade through the second drive shaft;

The main body is provided with a central processing unit, the central processing unit is provided with a wireless communication module, and the first driving motor and the second driving motor are both electrically connected to the central processing unit.

Preferably, in order to detect the state of the intake valve through the pressure data, the first transmission assembly includes a first sleeve arranged horizontally, the vertical section of the first sleeve is U-shaped, and the first sleeve is in a U shape. A first pressure sensor, a horizontally arranged first spring and a first glass bead are arranged in the sleeve, the first pressure sensor is fixed on the bottom end of the first sleeve, and one end of the first spring is fixed on the first pressure sensor The other end of the first spring is fixed on the first glass bead, and the first glass bead is connected with the intake valve.

Preferably, in order to detect the state of the air outlet valve through the pressure data, the second transmission assembly includes a vertically arranged second sleeve, the vertical cross-section of the second sleeve is U-shaped, and the second sleeve is U-shaped. A second pressure sensor, a vertically arranged second spring and a second glass bead are arranged in the sleeve, the second pressure sensor is fixed on the bottom end of the second sleeve, and the bottom end of the second spring is fixed on the second On the pressure sensor, the top end of the second spring is fixed on the second glass bead, and the second glass bead is connected to the air outlet valve.

Preferably, in order to improve the driving capability of the drive unit and speed up the operating frequency of the intake valve and the exhaust valve, thereby improving the intake capability, the first drive motor is a DC servo motor.

Preferably, in order to reduce the moving friction force of the first moving block and the second moving block, the first moving block and the second moving block are coated with lubricating oil.

Preferably, in order to keep the second connecting shaft rotating along its own central axis, a connecting block is provided at one end of the clean air pipe close to the second air duct, and the vertical cross-section of the connecting block is U-shaped, and the first One end of the two driving shafts away from the second driving motor is arranged in the connecting block.

Preferably, in order to increase the intake air volume of the air intake port, the shape of the air intake port is a trumpet shape.

Preferably, in order to facilitate the movement of the air water maker, several universal wheels are provided below the main body.

The beneficial effect of the present invention is that the silent air water maker for smart furniture based on the Internet of Things controls the opening and closing of the air inlet valve and the air outlet valve at the same time through the driving unit, which facilitates the air to enter the air intake mechanism and then be discharged. The moving gear drives the connection, so that the air circulates without noise pollution and ensures the quiet environment of the smart home. Not only that, the second drive motor rotates the blades to generate airflow. Under the action of the centrifugal force of the airflow, the impurities in the air are removed. Harmful substances are thrown out of the air flow center and adsorbed on the filter screen in the air purification pipe, so as to achieve the purpose of air purification and ensure the health of the generated water quality.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

1 is a schematic structural diagram of a silent air water maker for smart furniture based on the Internet of Things of the present invention;

2 is a schematic structural diagram of the air intake mechanism of the silent air water maker for smart furniture based on the Internet of Things of the present invention;

3 is a schematic structural diagram of a drive unit of a silent air water maker for smart furniture based on the Internet of Things of the present invention;

4 is a schematic structural diagram of a drive unit of a silent air water maker for smart furniture based on the Internet of Things of the present invention;

5 is a schematic structural diagram of the air intake pipe of the silent air water maker for smart furniture based on the Internet of Things of the present invention;

6 is a schematic structural diagram of the air outlet pipe of the silent air water maker for smart furniture based on the Internet of Things of the present invention;

7 is a schematic structural diagram of the air purification pipe of the silent air water maker for smart furniture based on the Internet of Things of the present invention;

8 is a schematic structural diagram of the air purification pipe of the silent air water maker for smart furniture based on the Internet of Things of the present invention;

In the picture: 1. Main body, 2. Display screen, 3. Air inlet, 4. Water outlet, 5. Indicator light, 6. Operation buttons, 7. Universal wheel, 8. Air inlet pipe, 9. Air outlet pipe, 10 .Air tank, 11. Connecting pipe, 12. Air intake unit, 13. Air outlet unit, 14. Drive unit, 15. Piston, 16. Fixed rod, 17. First drive motor, 18. First drive shaft, 19 .drive gear, 20. driven gear, 21. first eccentric shaft, 22. second eccentric shaft, 23. first connecting rod, 24. second connecting rod, 25. third connecting rod, 26. first moving Block, 27. Intake valve, 28. First sleeve, 29. First pressure sensor, 30. First spring, 31. First glass bead, 32. Second moving block, 33. Outlet valve, 34. Section Two sleeves, 35. Second pressure sensor, 36. Second spring, 37. Second glass beads, 38. Clean air tube, 39. First air tube, 40. Second air tube, 41. Second drive motor, 42. The second drive shaft, 43. The blade, 44. The filter screen, 45. The connecting block.

Detailed ways

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

As shown in Figures 1-8, a silent air water maker for smart furniture based on the Internet of Things includes a main body 1, an air inlet 3 arranged on one side of the main body 1 and an air inlet 3 arranged on the other side of the main body 1 The water outlet 4, the main body 1 is provided with a display screen 2, a number of indicator lights 5 and a number of operation buttons 6;

The air inlet 3 is provided with an air intake mechanism and an air purification mechanism, the air intake mechanism is connected with the air purification mechanism, and the air purification mechanism is connected with the main body 1;

The air intake mechanism includes an air intake pipe 8 arranged horizontally, an air outlet pipe 9 arranged vertically, an air storage tank 10 arranged vertically and a connecting pipe 11, and the air outlet pipe 9 and the air storage tank 10 are both communicated with the air inlet pipe 8. , the air outlet pipe 9 is communicated with the air storage tank 10 through the connecting pipe 11, the air inlet pipe 8 is provided with an air inlet unit 12, the air outlet pipe 9 is provided with an air outlet unit 13, and the air storage tank 10 is provided with an air outlet unit 13. There is a horizontally arranged piston 15, a drive unit 14 is arranged in the connecting pipe 11, and the drive unit 14 is respectively connected with the air intake unit 12, the air outlet unit 13 and the piston 15 in a driving manner;

The intake unit 12 includes a vertically arranged first moving block 26, a first transmission assembly and an intake valve 27. The first moving block 26 is drive-connected to the intake valve 27 through the first transmission assembly. The top end of the air valve 27 is hinged with the top end of the inner wall of the intake pipe 8;

The air outlet unit 13 includes a horizontally arranged second moving block 32, a second transmission assembly and an air outlet valve 33. The second moving block 32 is connected to the air outlet valve 33 through a transmission through the second transmission assembly. One end of the air outlet valve 33 It is hinged with one end of the inner wall of the air outlet pipe 9;

The drive unit 14 includes a fixed rod 16, a first drive motor 17, a first drive shaft 18, a drive gear 19, a driven gear 20, a first eccentric shaft 21, a second eccentric shaft 22, a first connecting rod 23, a first The second connecting rod 24 and the third connecting rod 25, the fixing rod 16 is fixed on the inner wall of the connecting pipe 11, the first driving motor 17 is fixed on the fixing rod 16, the first driving motor 17 is connected with the first driving The drive gear 19 is fixed on the first drive shaft 18, the driven gear 20 meshes with the drive gear 19, and the first eccentric shaft 21 is fixed on one side of the driven gear 20, so The second eccentric shaft 22 is fixed on the other side of the driven gear 20, the driven gear 20 is hinged with the piston 15 through the first eccentric shaft 21, and the driven gear 20 is connected to the first movable gear through the first eccentric shaft 21. The block 26 is hinged, and the driven gear 20 is hinged with the second moving block 32 through the second eccentric shaft 22;

The air purification mechanism includes a clean air pipe 38 , a first air pipe 39 provided on one side of the clean air pipe 38 and a second air pipe 40 provided on the other side of the clean air pipe 38 , and the air outlet pipe 9 passes through the first air pipe 39 . communicated with the clean air pipe 38, the clean air pipe 38 communicates with the interior of the main body 1 through the second air conduit 40;

The clean air pipe 38 is provided with a clean air unit, and the clean air unit includes a second drive motor 41, a horizontally arranged second drive shaft 42, a filter screen 44 and a number of blades 43. The vertical section of the filter screen 44 The shape of the filter is annular, the filter screen 44 is fixed on the inner wall of the clean air pipe 38, the second drive motor 41 is fixed on the end of the clean air pipe 38 away from the second air guide pipe 40, and the blades 43 are evenly distributed in the circumferential direction. The outer circumference of the second drive shaft 42, the second drive motor 41 is connected to the blade 43 in a driving manner through the second drive shaft 42;

The main body 1 is provided with a central processing unit, the central processing unit is provided with a wireless communication module, and the first driving motor 17 and the second driving motor 41 are both electrically connected to the central processing unit.

Preferably, in order to detect the state of the intake valve 27 through the pressure data, the first transmission assembly includes a first sleeve 28 arranged horizontally, and the vertical section of the first sleeve 28 is U-shaped, so The first sleeve 28 is provided with a first pressure sensor 29, a horizontally arranged first spring 30 and a first glass bead 31. The first pressure sensor 29 is fixed on the bottom end of the first sleeve 28. One end of a spring 30 is fixed on the first pressure sensor 29 , and the other end of the first spring 30 is fixed on the first glass bead 31 , and the first glass bead 31 is connected to the intake valve 27 .

Preferably, in order to detect the state of the air outlet valve 33 through the pressure data, the second transmission assembly includes a vertically arranged second sleeve 34, and the vertical cross-section of the second sleeve 34 is U-shaped, so The second sleeve 34 is provided with a second pressure sensor 35, a vertically arranged second spring 36 and a second glass bead 37, and the second pressure sensor 35 is fixed at the bottom end of the second sleeve 34, so The bottom end of the second spring 36 is fixed on the second pressure sensor 35 , and the top end of the second spring 36 is fixed on the second glass beads 37 , and the second glass beads 37 are connected to the air outlet valve 33 .

Preferably, in order to improve the driving capability of the drive unit 14 and speed up the operating frequency of the intake valve 27 and the exhaust valve 33 to improve the intake capability, the first drive motor 17 is a DC servo motor.

Preferably, in order to reduce the moving friction force of the first moving block 26 and the second moving block 33 , the first moving block 26 and the second moving block 32 are coated with lubricating oil.

Preferably, in order to keep the second connecting shaft 42 rotating along its own central axis, a connecting block 45 is provided at one end of the clean air pipe 38 close to the second air duct 40, and the vertical section of the connecting block 45 is U-shaped The end of the second drive shaft 42 away from the second drive motor 41 is disposed in the connection block 45 .

Preferably, in order to increase the air intake volume of the air inlet 3, the shape of the air inlet 3 is a trumpet shape.

Preferably, in order to facilitate the movement of the air water maker, several universal wheels 7 are provided below the main body 1 .

When the air intake mechanism in the air inlet 3 of the air water maker introduces air, the first drive motor 17 in the connecting pipe 11 is rotated to drive the drive gear 19 on the first drive shaft 18 along the first drive shaft 18. The central axis rotates, and the driven gear 20 rotates due to the meshing of the driven gear 20 with the drive gear 19 . During the rotation of the driven gear 20 , the first eccentric shaft 21 on the driven gear 20 rotates along the central axis of the driven gear 20 , and the piston 15 in the air tank 10 moves up and down through the hinged action of the first connecting rod 23 , In addition, under the hinged action of the second connecting rod 24, the first moving block 26 in the intake pipe 8 is displaced left and right, so that the first sleeve 28 moves left and right, and the intake valve 27 is opened or closed through the first glass beads 31. At the same time, on the second eccentric shaft 22 on the other side of the driven gear 20, the second moving block 32 moves up and down through the hinge action of the third link 25, and under the middle action of the second sleeve 34, the The air outlet valve 33 is opened and closed to facilitate the circulation of air. When the piston 15 moves downward, the intake valve 27 is opened, and the outlet valve 33 is closed. During the downward movement of the piston 15, the air enters the air storage tank 10 from the intake valve 27 in the intake pipe 8, and is driven by The gear 20 rotates to move the piston 15 upward. At this time, the intake valve 27 is closed, and the outlet valve 33 is opened. The air that originally flowed into the air storage tank 10 flows out of the air outlet 9 through the air outlet valve 33 opened by the air outlet pipe 9 and enters the air outlet 9. in the air purification system. The Internet of Things-based silent air water maker for smart furniture controls the opening and closing of the air inlet valve 27 and the air outlet valve 33 at the same time through the drive unit 14, which is convenient for the air to enter the air intake mechanism and then be discharged. Since the driven gear 20 is used to drive The connection method makes the air flow without noise pollution and ensures the quiet environment of the smart home.

In the air purification mechanism, the air enters the interior of the air purification pipe 38 from the first air conduit 39, and the second drive motor 41 is used to drive the second drive shaft 42 to drive the second drive shaft 42 along itself during the flow of the air purification pipe 38 to the second air conduit 40. The central axis rotates to make the blades 43 rotate. During the rotation of the blades 43, an airflow that rotates along the central axis of the second drive shaft 42 is generated. The airflow rotates. Under the action of centrifugal force, impurities and harmful substances in the air are thrown out of the airflow center. And it is adsorbed on the filter screen 44 in the clean air pipe 38, and finally the air fills the second air pipe 40 and flows out into the interior of the main body 1 to perform water production. The Internet of Things-based silent air water maker for smart furniture rotates the blades 43 through the second drive motor 41 to generate airflow. Under the action of the centrifugal force of the airflow, the impurities and harmful substances in the air are thrown out of the center of the airflow. It is adsorbed on the filter screen 44 in the air purification pipe 38, so as to achieve the purpose of air purification and ensure the health of the generated water quality.

Compared with the prior art, the Internet of Things-based silent air water maker for smart furniture controls the opening and closing of the air inlet valve 27 and the air outlet valve 33 at the same time through the drive unit 14, which is convenient for air to enter the air intake mechanism and then be discharged. Due to the use of the driven gear 20 to drive the connection, the air is free from noise pollution during the circulation process, ensuring a quiet environment for the smart home. Not only that, the second drive motor 41 rotates the blades 43 to generate airflow, which is under the action of the centrifugal force of the airflow. Then, impurities and harmful substances in the air are thrown out of the center of the airflow and adsorbed on the filter screen 44 in the air purification pipe 38, thereby achieving the purpose of air purification and ensuring the health of the generated water quality.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (2)

1. A mute type air water generator based on the Internet of things and used for intelligent furniture is characterized by comprising a main body (1), an air inlet (3) arranged on one side of the main body (1) and a water outlet (4) arranged on the other side of the main body (1), wherein a display screen (2), a plurality of indicator lamps (5) and a plurality of operation keys (6) are arranged on the main body (1); an air inlet mechanism and an air purifying mechanism are arranged in the air inlet (3), the air inlet mechanism is connected with the air purifying mechanism, and the air purifying mechanism is connected with the main body (1); the air inlet mechanism comprises a horizontally arranged air inlet pipe (8), a vertically arranged air outlet pipe (9), a vertically arranged air storage tank (10) and a connecting pipe (11), the air outlet pipe (9) and the air storage tank (10) are communicated with the air inlet pipe (8), the air outlet pipe (9) is communicated with the air storage tank (10) through the connecting pipe (11), an air inlet unit (12) is arranged in the air inlet pipe (8), an air outlet unit (13) is arranged in the air outlet pipe (9), a horizontally arranged piston (15) is arranged in the air storage tank (10), a driving unit (14) is arranged in the connecting pipe (11), and the driving unit (14) is in transmission connection with the air inlet unit (12), the air outlet unit (13) and the piston (15) respectively; the air inlet unit (12) comprises a first moving block (26), a first transmission assembly and an air inlet valve (27), wherein the first moving block (26) is vertically arranged, the first transmission assembly is in transmission connection with the air inlet valve (27), and the top end of the air inlet valve (27) is hinged with the top end of the inner wall of the air inlet pipe (8); the air outlet unit (13) comprises a second moving block (32), a second transmission assembly and an air outlet valve (33), the second moving block (32) is horizontally arranged, the second transmission assembly is in transmission connection with the air outlet valve (33), and one end of the air outlet valve (33) is hinged with one end of the inner wall of the air outlet pipe (9); the driving unit (14) comprises a fixing rod (16), a first driving motor (17), a first driving shaft (18), a driving gear (19), a driven gear (20), a first eccentric shaft (21), a second eccentric shaft (22), a first connecting rod (23), a second connecting rod (24) and a third connecting rod (25), the fixing rod (16) is fixed on the inner wall of the connecting pipe (11), the first driving motor (17) is fixed on the fixing rod (16), the first driving motor (17) is in transmission connection with the first driving shaft (18), the driving gear (19) is fixed on the first driving shaft (18), the driven gear (20) is meshed with the driving gear (19), the first eccentric shaft (21) is fixed on one side of the driven gear (20), the second eccentric shaft (22) is fixed on the other side of the driven gear (20), the driven gear (20) is hinged with the piston (15) through a first eccentric shaft (21), the driven gear (20) is hinged with a first moving block (26) through the first eccentric shaft (21), and the driven gear (20) is hinged with a second moving block (32) through a second eccentric shaft (22); the air purifying mechanism comprises an air purifying pipe (38), a first air duct (39) arranged on one side of the air purifying pipe (38) and a second air duct (40) arranged on the other side of the air purifying pipe (38), the air outlet pipe (9) is communicated with the air purifying pipe (38) through the first air duct (39), and the air purifying pipe (38) is communicated with the inside of the main body (1) through the second air duct (40); a gas purification unit is arranged in the gas purification pipe (38), the gas purification unit comprises a second driving motor (41), a second driving shaft (42) which is horizontally arranged, a filter screen (44) and a plurality of blades (43), the vertical section of the filter screen (44) is annular, the filter screen (44) is fixed on the inner wall of the gas purification pipe (38), the second driving motor (41) is fixed at one end, far away from the second gas guide pipe (40), in the gas purification pipe (38), the blades (43) are uniformly distributed on the periphery of the second driving shaft (42) in the circumferential direction, and the second driving motor (41) is in transmission connection with the blades (43) through the second driving shaft (42); a central processing unit is arranged in the main body (1), a wireless communication module is arranged in the central processing unit, and the first driving motor (17) and the second driving motor (41) are electrically connected with the central processing unit; the first transmission assembly comprises a first sleeve (28) which is horizontally arranged, the vertical section of the first sleeve (28) is U-shaped, a first pressure sensor (29), a first spring (30) and a first glass bead (31) which are horizontally arranged are arranged in the first sleeve (28), the first pressure sensor (29) is fixed at the bottom end of the first sleeve (28), one end of the first spring (30) is fixed on the first pressure sensor (29), the other end of the first spring (30) is fixed on the first glass bead (31), and the first glass bead (31) is connected with the air inlet valve (27); the first driving motor (17) is a direct current servo motor.

2. The internet of things-based silent air water generator for intelligent furniture according to claim 1, wherein the second transmission assembly comprises a second sleeve (34) which is vertically arranged, the vertical section of the second sleeve (34) is in a U shape, a second pressure sensor (35), a second spring (36) which is vertically arranged and a second glass bead (37) are arranged in the second sleeve (34), the second pressure sensor (35) is fixed at the bottom end in the second sleeve (34), the bottom end of the second spring (36) is fixed on the second pressure sensor (35), the top end of the second spring (36) is fixed on the second glass bead (37), and the second glass bead (37) is connected with the air outlet valve (33).

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