CN211186564U - Air inflation and exhaust system and air mattress - Google Patents

Abstract

The utility model discloses an air charging and discharging system for charging and discharging air for an air bag, relating to the technical field of air mattresses. The air charging and discharging system comprises an air inlet pipe used for being communicated with an air source and at least two-way electromagnetic valves communicated with the side part of the air inlet pipe, wherein the air inlet of each two-way electromagnetic valve is communicated with the air inlet pipe; the valve structure is positioned between the air inlet pipe and the air source and used for conducting or blocking the air source, and each two-way electromagnetic valve is respectively communicated with the power supply; when the air charging and discharging system is connected with the air bag, the air outlet of one two-way electromagnetic valve is communicated with the atmosphere, and the air outlets of the other two-way electromagnetic valves are correspondingly communicated with the air bag one to one. The utility model provides a fill exhaust system carries out structure integration with a plurality of two way solenoid valves and forms the overall structure who possesses a plurality of inlet channels and independent exhaust passage and every passageway all have the valve, and the structure is succinct and the wholeness is high, is connected with the inflation inlet of gasbag and can realizes aerifing and exhaust operation to realized advancing carminative smooth and easy switching.

Description

Air inflation and exhaust system and air mattress

Technical Field

The utility model relates to an air mattress technical field, more specifically say, relate to an inflate exhaust system and air mattress.

Background

Existing inflatable mattresses are equipped with an inflation and deflation system, which typically uses a two-way solenoid valve as an inflation valve. However, the two-way electromagnetic valve is used for inflating, each air bag of the air cushion needs to be additionally provided with an exhaust structure, the structure is complicated, the inflation and deflation conversion is inconvenient to realize, and the exhaust volume is not easy to regulate and control; when the air cushion is provided with a plurality of air bags, each air bag is provided with an electromagnetic valve and an exhaust structure, and the air bag positioned in the middle of the mattress needs to be exhausted by an additional air guide channel to be communicated with the outside atmosphere, so that the structure is particularly complicated, and the production difficulty is high.

In view of this, it is desirable to improve the inflation and deflation system of the inflatable mattress, reduce the complexity of the structure, and improve the smoothness and convenience of the inflation and deflation switching operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exhaust system fills, it carries out structure integration with a plurality of two-way solenoid valves, simple structure, only through the two-way solenoid valve of combination realized advancing carminative smooth and easy switching promptly. The utility model also aims to provide an inflatable mattress comprising the inflation and exhaust system.

The utility model provides a charge exhaust system for charge exhaust for the gasbag, which is characterized in that the system comprises an air inlet pipe for communicating with the air source and at least two-way electromagnetic valves communicated with the side part of the air inlet pipe, wherein the air inlet of each two-way electromagnetic valve is communicated with the air inlet pipe; the valve structure is positioned between the air inlet pipe and the air source and used for conducting or blocking the air source, and each two-way electromagnetic valve is respectively communicated with a power supply; when the air charging and discharging system is connected with the air bag, the air outlet of one of the two-way electromagnetic valves is communicated with the atmosphere, and the air outlets of the other two-way electromagnetic valves are correspondingly communicated with the air bag one by one.

Preferably, the two-way electromagnetic valve includes a valve body and a valve core telescopically connected to the valve body, the valve body is connected with an inflation and exhaust interface, the inflation and exhaust interface includes an air inlet pipe, an air outlet pipe communicated with a side wall of the air inlet pipe, and a connecting branch pipe communicated with the air outlet pipe and provided for the valve core to extend into, the air outlet pipe and the connecting branch pipe are respectively provided with a plurality of two-way electromagnetic valves in one-to-one correspondence, and are respectively distributed along an axial direction of the air inlet pipe, the valve core extends into the connecting branch pipe and telescopically plugs the air outlet pipe so as to enable the air inlet pipe to be communicated with or blocked from the air outlet pipe, and one end of the air outlet pipe far away from the air inlet pipe forms an.

Preferably, an air pressure sensor access port is arranged on the side wall of the air outlet pipe, and an air flow pipe of the air pressure sensor is communicated with the air pressure sensor access port.

Preferably, the charging and discharging port is of an integrated structure, a first end of each connecting branch pipe is communicated with the side wall of the gas inlet pipe, a second end of each connecting branch pipe is detachably connected with the valve body, the second end of each connecting branch pipe is communicated with a sliding groove on the valve body, the sliding groove is used for the valve core to stretch and displace in an aligned mode, one end of the valve core penetrates through the connecting branch pipes to extend into the gas inlet pipe and block a pipe opening, connected with the gas inlet pipe, of the gas outlet pipe, and the radial size of one end of the valve core along the gas inlet pipe is smaller than the inner diameter of.

Preferably, the pneumatic control system further comprises a controller, and the two-way electromagnetic valve and the corresponding air pressure sensor are electrically connected with the controller, so that the controller can turn on or turn off the two-way electromagnetic valve according to signals of the air pressure sensor.

Preferably, one end of the valve core, which is used for plugging the air outlet pipe, is provided with a rubber cap used for sealing the pipe orifice of the air outlet pipe.

Preferably, the charging and discharging interface further comprises a discharging branch pipe located on the side wall of each gas outlet pipe, the discharging branch pipe is communicated with the gas outlet pipe to form the air pressure sensor access port, and an airflow pipe of the air pressure sensor is sleeved on the discharging branch pipe.

Preferably, an air pump is arranged between the air inlet pipe and the air source, and a valve of an air outlet of the air pump forms the valve structure.

Preferably, a sealing member is disposed between the valve core and the connecting branch pipe.

The utility model also provides an inflatable mattress is provided with the exhaust system that fills of inflating for the gasbag in the mattress, it is as above arbitrary to fill exhaust system.

The utility model provides an among the technical scheme, be used for filling carminative gas charging and discharging system of gasbag including be used for with the intake pipe of air supply intercommunication, and communicate in two at least two-way solenoid valves of intake pipe lateral part, be equipped with the valve structure who is used for switching on or blocking the air supply between intake pipe and the air supply. The air inlet of each two-way electromagnetic valve is communicated with the air inlet pipe, the air outlet of each two-way electromagnetic valve is communicated with the air bag, and the air inlet of each two-way electromagnetic valve is communicated with the air source through the same air inlet pipe. Each two-way electromagnetic valve is respectively communicated with a power supply; when the air charging and exhausting system is connected with the air bag, the air outlet of one two-way electromagnetic valve is communicated with the atmosphere, and the air outlets of the other two-way electromagnetic valves are correspondingly communicated with the air bag one to one.

When in use, the air outlet of one two-way electromagnetic valve is communicated with the atmosphere, and the air outlets of the rest two-way electromagnetic valves are respectively communicated with the air bag. When each or one of the air bags needs to be inflated, the valve structure between the air source and the air inlet pipe is opened, the corresponding two-way electromagnetic valve is electrified, the valve core acts to enable the air inlet and the air outlet to be communicated, and air enters the air bag; when the air inflation is finished, the valve structure is closed, the air source is blocked, the two-way electromagnetic valve is powered off, the valve core is reset, the air outlet is blocked, and the air pressure in the air bag is kept stable; when each air bag or one air bag needs to exhaust outwards, the corresponding two-way electromagnetic valve is electrified, the valve core acts and opens the air outlet, and the air in the air bag enters the air inlet pipe from the air outlet and then is exhausted from the air outlet of the two-way electromagnetic valve communicated with the atmosphere. So set up, use same intake pipe to carry out structure integration through the air inlet with two at least two solenoid valves and use a plurality of two solenoid valves as whole to regard one of them two solenoid valve as discharge valve, make and fill exhaust system and possess a plurality of business turn over gas passage and an exhaust passage of monolithic structure, simple structure, and only need be connected with the inflation inlet of gasbag and just can realize inflating of gasbag and two kinds of operations of exhausting and can realize filling carminative convenient switching.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view illustrating an inflation state of an inflation and exhaust system according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of an air charging and discharging system according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an air charging/discharging conversion interface in an embodiment of the present invention;

fig. 4 is a schematic view of the overall structure of the air charging and discharging system in the embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a controller according to an embodiment of the present invention;

FIG. 6 is a schematic circuit diagram of the embodiment of the present invention in which the two-way solenoid valve is connected to the controller;

fig. 7 is a schematic circuit diagram of the connection between the air pressure sensor and the controller according to the embodiment of the present invention.

In fig. 1-4:

11. a valve body; 12. a valve core; 13. a rubber cap; 2. a charging and discharging conversion interface; 21. an air inlet pipe; 22. An air outlet pipe; 23. connecting branch pipes; 24. an exhaust branch pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An object of the present embodiment is to provide an inflation/exhaust system that has a simple structure by structurally integrating a plurality of two-way solenoid valves, and realizes smooth switching between intake and exhaust only by the combined two-way solenoid valve. It is also an object of this embodiment to provide an inflatable mattress that includes the inflation and deflation system described above.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-4, the present embodiment provides an inflation/deflation system for inflating/deflating an airbag, which includes an air inlet tube 21 for communicating with an air source, and at least two-way solenoid valves communicated with the side of the air inlet tube 21. Each two-way electromagnetic valve comprises an air inlet and an air outlet. Fig. 1-4 are examples of 6 two-way solenoid valves. A valve structure for communicating or blocking the air source is arranged between the air inlet pipe 21 and the air source. The air inlets of the two-way electromagnetic valves are communicated with the air inlet pipe 21, namely, the air inlets are communicated with the air source through the same air inlet pipe 21. Among the air outlets, when the inflation and exhaust system is connected with the air bags, one air outlet is used for communicating with the atmosphere, and the other air outlets are respectively communicated with the air bags. When the air bag inflation device is used, the air outlet of one two-way electromagnetic valve is communicated with the atmosphere, and the air outlets of the rest two-way electromagnetic valves are respectively communicated with the inflation inlet of the air bag. When each or one of the air bags needs to be inflated, the valve structure between the air source and the air inlet pipe 21 is opened, the corresponding two-way electromagnetic valve is electrified, the valve core 12 acts to lead the air inlet and the air outlet to be communicated, and the air enters the air bag; when the air inflation is finished, the valve structure is closed, the air source is blocked, the two-way electromagnetic valve is powered off, the valve core 12 is reset, the air outlet is blocked, and the air pressure in the air bag is kept stable; when each air bag or one air bag needs to exhaust outwards, the corresponding two-way electromagnetic valve is electrified, the valve core 12 acts and opens the air outlet, and the air in the air bag enters the air inlet pipe 21 from the air outlet of the two-way electromagnetic valve and then is exhausted from the air outlet of the two-way electromagnetic valve communicated with the atmosphere.

So set up, the exhaust operation that fills of a plurality of gasbags all can fill the exhaust system through one and realize, through carrying out the structural integration as the whole structure use that fills the exhaust operation and fill the exhaust conversion with at least two-way solenoid valves, divide a plurality of business turn over gas passages from intake pipe 21, and a two-way solenoid valve that is used for conducting with the atmosphere uses as special discharge valve and exhaust passage, make and fill exhaust system and possess a plurality of business turn over gas passages and an exhaust passage of monolithic structure, and every passageway all possesses the valve that independently opens and shuts, moreover, the steam generator is simple in structure, only need be connected with the inflation inlet of gasbag and just can realize filling the convenient switching of exhaust with two kinds of operations of exhaust of the gasbag. And each two-way electromagnetic valve is respectively communicated with the power supply, so that the inflation and exhaust operations of each air bag can be carried out independently or uniformly. Compared with the prior art that each air bag is provided with a two-way electromagnetic valve and an exhaust pipeline, the structure is obviously simplified, the complexity is reduced, the switching of inflation and exhaust is more convenient and smoother, and the operation is simple and convenient; compared with the structure that each air bag is provided with a multi-position and multi-way electromagnetic valve, the structure is simpler and integrated, the economy is better, and the controllability and the control convenience of the air bags for inflating and exhausting are enhanced.

In the prior art, a two-way solenoid valve has a valve body 11, a valve cartridge 12 telescopically connected to the valve body 11, and a valve tube for connection in a pipeline. The valve body 11 is provided with a sliding groove for the telescopic displacement of the valve core 12, the first end of the valve core 12 is telescopically connected in the sliding groove, and the second end of the valve core extends into the pipe cavity of the valve pipe from the side part of the valve pipe for plugging or conducting the valve pipe. Specifically, the two-way solenoid valves are structurally integrated, and one end of each valve pipe may be connected to the side wall of the same intake pipe 21. Thus, the structure is simple.

Or, further, to achieve the purpose of increasing the specification of the gas path and shortening the charging and discharging time, as shown in fig. 1, fig. 3 and fig. 4, in this embodiment, the charging and discharging system is provided with a charging and discharging conversion interface 2, and the charging and discharging conversion interface 2 includes the above-mentioned gas inlet pipe 21, a plurality of gas outlet pipes 22 communicated on the side wall of the gas inlet pipe 21, and a plurality of connecting branch pipes 23 communicated with the gas outlet pipes 22 in a one-to-one correspondence manner. The air outlet pipe 22 and the air inlet pipe 21 are communicated to form an air inlet and outlet passage. In the group of the air outlet pipes 22 and the connecting branch pipes 23, the connecting branch pipes 23 are connected with the two-way electromagnetic valve body 11 and can be aligned and communicated with the sliding groove, so that the valve core 12 extends into the connecting branch pipes 23, and the second end of the valve core 12 can block the air outlet pipes 22 to form a valve on the channel. The other end of the outlet tube 22 forms the outlet of the two-way solenoid valve. According to the arrangement, the valve pipe of the electromagnetic valve in the prior art is removed, the two-way electromagnetic valves are connected into a whole through the whole structural member-charging and discharging conversion interface 2, the gas paths of the two-way electromagnetic valves are integrated together, and an integral structure mode that a main pipeline directly communicated with a gas source is connected with a plurality of branch pipelines is formed, so that the limitation of the specification of the valve pipe of the two-way electromagnetic valve in the prior art is avoided. The air path of the whole air charging and discharging system can be subjected to size adjustment by adjusting or replacing the pipe diameter specifications of the air inlet pipe 21 and the air outlet pipe 22, so that the air charging and discharging system can be specifically set according to the specification size of the air bag.

An air pump can be arranged between the air source and the air inlet pipe 21, a valve of an air outlet of the air pump can be used as a valve structure between the air inlet pipe 21 and the air source, and the air pump can enable air to have pressure and shorten the air charging time.

As shown in fig. 3, the charge/discharge conversion interface 2 may be a one-piece structure, formed by injection molding a plastic structural member. For production convenience, the connecting branch 23 may be connected to the side wall of the inlet pipe 21 and arranged at an angle to the outlet pipe 22. The air outlet pipe 22, the air inlet pipe 21 and the connecting branch pipe 23 form a three-way fork at the intersection, and the second end of the valve core 12 penetrates through the connecting branch pipe 23 to extend into the three-way fork and block the pipe orifice of the air outlet pipe 22. The mouth of the outlet pipe 22 can extend into the cavity of the inlet pipe 21 so as to facilitate the plugging of the valve core 12. The second end of the valve core 12 has a dimension in the axial direction of the inlet pipe 21 larger than the inner diameter of the orifice of the outlet pipe 22 and a dimension in the radial direction smaller than the inner diameter of the inlet pipe 21 to prevent the inlet pipe 21 from being blocked. Or, as shown in fig. 1, the connecting branch 23 and the outlet pipe 22 are symmetrically arranged about the inlet pipe 21, the outer diameter of the outlet pipe 22 is smaller than the inner diameter of the inlet pipe 21, and one end of the outlet pipe 22 passes through the inlet pipe 21 and extends into the connecting branch 23 while keeping a distance with the inner wall of the connecting branch 23 to form a gas passage, and during inflation, gas enters the inlet pipe 21, the connecting branch 23 and the outlet pipe 22 in sequence as shown in fig. 1. So configured, as shown in fig. 2, the second end of the valve core 12 is easily attached to the mouth of the outlet pipe 22 to form a seal.

The second end of the valve core 12 may be tightly fitted with the orifice of the outlet pipe 22, such as tightly connected or provided with a sealing member. Alternatively, as shown in fig. 1 and fig. 2, in this embodiment, the second end of the valve core 12 may be provided with a rubber cap 13, and the rubber cap 13 may tightly seal the opening of the air outlet pipe 22. The rubber cap 13 may be wrapped on the second end of the valve core 12, or bonded to the valve core 12 in a block shape.

A sealing member, such as a sealing ring, may be disposed between the valve core 12 and the pipe cavity connecting the branch pipes 23 to prevent gas leakage and also achieve the purpose of sealing the gas path.

The charging and discharging conversion interface 2 can be bonded with the valve body 11 of the two-way electromagnetic valve or can be detachably connected through a fastening piece. As shown in fig. 1 and 4, the connecting branch 23 has a relatively thick wall and may be in the form of a connecting seat, and a lumen of the connecting branch 23 penetrates through the connecting seat and is located in the middle of the connecting seat. The connecting seat is provided with a connecting hole which penetrates through the connecting seat and is used for a screw to penetrate through. Or, the end of the connecting branch pipe 23 is provided with a connecting sheet, and the connecting sheet is provided with a connecting hole for a screw to penetrate. The valve body 11 is provided with a threaded hole, and a fastening screw passes through the connecting hole and is screwed into the threaded hole on the valve body 11 to connect the connecting branch pipe 23 with the valve body 11. Thus, the charging and discharging conversion interface 2 is convenient to replace.

In order to fill a certain amount of gas into the airbag and provide a stable pressure to the airbag, the inflation and exhaust system provided in this embodiment is further provided with a pressure sensor, and a gas flow pipe of the pressure sensor for receiving a gas flow is connected to the gas outlet pipe 22. As shown in fig. 1 and 3, an air pressure sensor inlet is disposed on a side wall of the air outlet tube 22, and the air pressure sensor inlet is communicated with a tube cavity of the air outlet tube 22 and is used for receiving an air flow tube of the air pressure sensor and providing a detection air source for the air pressure sensor. Through making baroceptor connect the display, can learn the real-time pressure value in the gasbag directly perceivedly, in time stop the operation of aerifing the exhaust, but also make have the controllability to the pressure in the gasbag. And the connection position of the air pressure sensor not only ensures that the air pressure sensor is connected stably, but also detects the air pressure at the air outlet, so that the detection air source is stable, and the problem of inaccurate detection result can not be caused.

The air pressure sensor inlet may be a through hole located on the side wall of the air outlet pipe 22, or as shown in fig. 1 and 3, an exhaust branch pipe 24 is provided on the side wall of the air outlet pipe 22, the exhaust branch pipe 24 is communicated with the air outlet pipe 22 to form the air pressure sensor inlet, and an airflow pipe of the air pressure sensor is sleeved on the exhaust branch pipe 24. The exhaust branch pipe 24 and the outlet pipe 22 may be a unitary structure. Through injection moulding, whole gas filling and exhausting conversion interface 2 can integrated into one piece, is connected with valve body 11 and can forms a gas filling and exhausting device. The air charging and discharging device is simple in structure, simple in production and processing, simple in structure and high in integrity. The inflation and exhaust device is connected with the air pressure sensor to form the inflation and exhaust system of the embodiment.

Further, the air pressure sensor can be connected with a copper core of the controller. In this embodiment, the inflation and exhaust system further includes a controller electrically connected to each two-way solenoid valve and each air pressure sensor, and the controller individually controls the corresponding two-way solenoid valve according to a signal of each air pressure sensor. The controller compares the signal value sensed by the air pressure sensor with a preset value, and when the signal value reaches the preset value, the corresponding two-way electromagnetic valve is disconnected, and the air inflation in the air bag is stopped. The controller can be a single chip microcomputer with the model STC15W4K56S4 in the prior art, and the circuit connection of the single chip microcomputer, the circuit connection of the air pressure sensor and the single chip microcomputer, and the circuit connection of the two-way electromagnetic valve and the single chip microcomputer are shown in figures 5-7.

The embodiment also provides an inflatable mattress, which is provided with an air cushion and an inflating and exhausting system for inflating and exhausting the air bag in the air cushion, wherein the inflating and exhausting system is the inflating and exhausting system described in the embodiment above, so that the inflatable mattress provided by the embodiment has the beneficial effects of convenient inflation and exhausting operation switching, simple structure of the inflating and exhausting system and reduction of the complexity of the structure of the mattress. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the charging and discharging system, and is not described in detail herein.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the invention comprise basic schemes, are independent from each other and are not restricted with each other, but can be combined with each other under the condition of no conflict, so that multiple effects are realized together.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An inflation and exhaust system is used for inflating and exhausting air bags and is characterized by comprising an air inlet pipe (21) communicated with an air source and at least two-way electromagnetic valves communicated with the side part of the air inlet pipe (21), wherein the air inlet of each two-way electromagnetic valve is communicated with the air inlet pipe (21); the air source control device also comprises a valve structure which is positioned between the air inlet pipe (21) and the air source and is used for conducting or blocking the air source, and each two-way electromagnetic valve is respectively communicated with a power supply; when the air charging and discharging system is connected with the air bag, the air outlet of one of the two-way electromagnetic valves is communicated with the atmosphere, and the air outlets of the other two-way electromagnetic valves are correspondingly communicated with the air bag one by one.

2. The inflation and exhaust system according to claim 1, wherein the two-way solenoid valve comprises a valve body (11) and a valve core (12) telescopically connected to the valve body (11), the valve body (11) is connected with an inflation and exhaust conversion interface (2), the inflation and exhaust conversion interface (2) comprises the air inlet pipe (21), an air outlet pipe (22) communicated with the side wall of the air inlet pipe (21), and a connecting branch pipe (23) communicated with the air outlet pipe (22) and provided for the valve core (12) to extend into, the air outlet pipe (22) and the connecting branch pipe (23) are respectively provided with a plurality of one-to-one correspondence to the two-way solenoid valves and are respectively distributed along the axial direction of the air inlet pipe (21), the valve core (12) extends into the connecting branch pipe (23) and seals the air outlet pipe (22) telescopically, so that the air inlet pipe (21) is communicated with or blocked by the air outlet pipe (22), and one end of the air outlet pipe (22) far away from the air inlet pipe (21) forms an air outlet of the two-way electromagnetic valve.

3. The charging and discharging system according to claim 2, wherein a pneumatic pressure sensor inlet is provided on a side wall of the gas outlet pipe (22), and a gas flow pipe of the pneumatic pressure sensor is communicated with the pneumatic pressure sensor inlet.

4. The charging and discharging system according to claim 2, wherein the charging and discharging conversion interface (2) is an integrated structure, a first end of each connecting branch pipe (23) is communicated with a side wall of the intake pipe (21), a second end of each connecting branch pipe is detachably connected with the valve body (11), the second end of each connecting branch pipe is aligned and communicated with a sliding groove of the valve body (11) for the telescopic displacement of the valve core (12), one end of the valve core (12) penetrates through the connecting branch pipe (23) and extends into the intake pipe (21) and blocks a pipe opening of the outlet pipe (22) connected with the intake pipe (21), and the size of one end of the valve core (12) along the radial direction of the intake pipe (21) is smaller than the inner diameter of the intake pipe (21).

5. The charging and discharging system according to claim 3, further comprising a controller, wherein the two-way solenoid valve and the corresponding air pressure sensor are electrically connected to the controller, so that the controller turns on or off the two-way solenoid valve according to a signal of the air pressure sensor.

6. The inflation and exhaust system according to claim 4, wherein one end of the valve core (12) for sealing the outlet pipe (22) is provided with a rubber cap (13) for sealing the orifice of the outlet pipe (22).

7. The charging and discharging system according to claim 3, wherein the charging and discharging conversion interface (2) further comprises a branch exhaust pipe (24) located on a side wall of each of the outlet pipes (22), the branch exhaust pipe (24) is communicated with the outlet pipe (22) to form the air pressure sensor inlet, and an air flow pipe of the air pressure sensor is sleeved on the branch exhaust pipe (24).

8. Charging and discharging system according to claim 1, characterised in that an air pump is arranged between the inlet pipe (21) and the air supply, the valve of the air outlet of the air pump forming the valve structure.

9. Charging and discharging system according to claim 2, characterised in that a seal is arranged between the valve cartridge (12) and the connecting branch (23).

10. An inflatable mattress provided with an inflation and deflation system for inflating and deflating air bladders within the mattress, wherein the inflation and deflation system is as claimed in any one of claims 1-9.

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