CN211561462U - A adapter and ventilation treatment equipment for ventilation treatment equipment - Google Patents

Abstract

The utility model relates to a treatment facility field of ventilating discloses an adapter and treatment facility of ventilating for ventilating treatment facility. The adapter has inlet port, be provided with check valve subassembly and pressure relief structure on the adapter, check valve subassembly sets up to close pressure relief structure and open inlet port when the user breathes in to can open pressure relief structure and close inlet port when the user exhales, check valve subassembly includes first valve block and second valve block, and first valve block is used for opening and closes inlet port, and the second valve block is used for opening and closes pressure relief structure. The utility model discloses a set up to having double valve block with check valve subassembly, one of them valve block is responsible for the switch inlet port, and another valve block is responsible for switch pressure release structure for check valve subassembly's function is undertaken by different valve blocks, and the reliability that check valve subassembly used is improved to reduction check valve subassembly's that can to a great extent machining precision requirement.

Description

A adapter and ventilation treatment equipment for ventilation treatment equipment

Technical Field

The utility model relates to a treatment facility field of ventilating specifically relates to an adapter and including the treatment facility of ventilating of this adapter for ventilating treatment facility.

Background

The household noninvasive ventilator on the market is widely applied at present, and has good curative effect on diseases such as snore, chronic obstructive pulmonary disease and the like. The high-flow humidification therapeutic apparatus is a new product gradually developed in recent years, mainly aims at people needing large-flow oxygen inhalation, can rapidly heat and humidify dry and cold oxygen, and can reach the most comfortable humidity of human bodies. The working principle of the high-flow humidification therapy apparatus is very similar to the continuous pressure ventilation (CPAP) function of a breathing machine, so that a combined integrated machine of the high-flow humidification therapy apparatus and the breathing machine has been produced in recent years.

However, after the two devices are integrated together (i.e. the integrated machine of the noninvasive ventilator and the high-flow humidification therapy apparatus), a one-way valve and a pressure release valve are required to be arranged in the air path, so as to realize the use of the high-flow and the ventilator modes. The one-way valve is used for preventing hot and humid air from flowing back to enter the machine end in a high-flow humidifying mode, and controlling the opening and closing of the air escape valve in a noninvasive ventilator mode, so that the air exhaled by a user can be smoothly exhausted. The existing check valve only realizes the two functions through one valve plate, so that the machining precision requirement of the check valve is too high, the sealing effect is reduced, the yield is reduced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adapter for ventilating treatment equipment and including the treatment equipment of ventilating of this adapter to solve current check valve and pass through the disappointing valve of single-valve piece control and seal the problem that the check valve machining precision requirement that inlet port leads to is too high.

In order to achieve the above object, an aspect of the present invention provides an adapter for ventilation therapy equipment, the adapter has an air inlet, be provided with check valve subassembly and pressure relief structure on the adapter, check valve subassembly sets up to close when the user breathes in pressure relief structure and open air inlet to can open when the user exhales pressure relief structure and close air inlet, check valve subassembly includes first valve block and second valve block, first valve block is used for opening and closing air inlet, the second valve block is used for opening and closing pressure relief structure.

Optionally, the first valve plate and the second valve plate are arranged at intervals along the air inlet direction of the air inlet port; and/or

Check valve subassembly includes the disk seat, the disk seat install in inlet port department, first valve block including set up in first coupling part on the disk seat with rotationally connect in first coupling part's first valve block main part, the second valve block including set up in second coupling part on the disk seat with rotationally connect in second coupling part's second valve block main part, check valve subassembly has and closes inlet port, opens pressure relief structure's primary importance and opens inlet port, close pressure relief structure's second place.

Optionally, the valve seat is at least partially sleeved in the air inlet port, the valve seat includes a first cylindrical cavity, a second cylindrical cavity and a third cylindrical cavity which are coaxially and sequentially communicated, diameters of the first cylindrical cavity, the second cylindrical cavity and the third cylindrical cavity are sequentially increased, a first step is formed between the first cylindrical cavity and the second cylindrical cavity, a second step is formed between the second cylindrical cavity and the third cylindrical cavity, and the third cylindrical cavity is arranged near the inside of the air inlet port;

in the first position, the first valve sheet main body is in contact seal with the end face of the first step, and the second valve sheet main body is in contact with the end face of the second step.

Alternatively, the end surface of the first step and the end surface of the second step are arranged obliquely from top to bottom toward the inside of the intake port.

Optionally, the adapter includes a first communication pipe having one end serving as the air inlet port, the pressure relief structure includes a pressure relief hole, and the pressure relief hole is formed in a bottom wall of the first communication pipe, the bottom wall being close to the air inlet port;

the adapter is including the upset piece, the upset piece rotationally set up in just can cover in the first connecting pipe the pressure release hole, second valve piece main part can be through rotary drive upset piece upset is in order to open or to cover the pressure release hole.

Optionally, the turnover part is a V-shaped structure formed by a first side plate and a second side plate which are connected with each other, a rotation axis of the turnover part is parallel to rotation axes of the first valve plate main body and the second valve plate main body, and the pressure relief hole is covered or opened by the first side plate or the second side plate.

Optionally, a blocking portion is disposed on an outer side surface of the first side plate or the second side plate, and the blocking portion can further block the pressure relief hole when the first side plate or the second side plate covers the pressure relief hole.

Optionally, the pressure relief structure includes a sealing sleeve, and the sealing sleeve is inserted in the pressure relief hole in a sealing manner and can be in sealing fit with the blocking portion.

Optionally, the adapter has the port of giving vent to anger, the adapter includes that one end does the second of the port of giving vent to anger communicates pipe, the second communicate pipe with first communicate pipe is connected, be provided with on the first communicate pipe with the interface that admits air of port intercommunication, admit air the interface be used for with the first interface connection of the water tank of the treatment of ventilating equipment, the second be provided with on communicating pipe with the interface of giving vent to anger of port intercommunication, the interface of giving vent to anger be used for with the second interface connection of water tank.

The utility model discloses another aspect provides a treatment facility of ventilating, including the water tank and above the adapter, the water tank includes that inside is injectd the main part in water storage chamber, the adapter connect in the main part, the adapter the inlet port with water storage chamber intercommunication.

Through the technical scheme, the utility model discloses a set up one-way valve subassembly into having double valve block, one of them valve block is responsible for the switch inlet port to prevent the gas refluence, another valve block is responsible for switch pressure release structure, makes one-way valve subassembly's function undertake by the valve block of difference, and the machining precision requirement of reduction one-way valve subassembly that can to a great extent improves the reliability that one-way valve subassembly used.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of an embodiment of the ventilation therapy device of the present invention, wherein only the water tank and the adapter are shown, the inlet port is in an open state, and the pressure relief structure is in a closed state;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the intake port of FIG. 1 in a closed state and the pressure relief structure in an open state;

FIG. 4 is a schematic view of an embodiment of the first valve plate of the present invention;

FIG. 5 is a schematic view of an embodiment of a second valve plate of the present invention;

FIG. 6 is a schematic view of another embodiment of the second valve plate of the present invention;

fig. 7 is a schematic view of another embodiment of the second valve plate according to the present invention.

Description of the reference numerals

10-adapter, 11-first communication pipe, 111-air inlet port, 112-air inlet interface, 12-second communication pipe, 121-air outlet port, 122-air outlet interface, 13-check valve component, 131-first valve plate, 1311-first connecting part, 1312-first valve plate main body, 132-second valve plate, 1321-second connecting part, 1322-second valve plate main body, 133-valve seat, 1331-first step, 1332-second step, 14-pressure relief structure, 141-pressure relief hole, 142-sealing sleeve, 15-turnover part, 151-first side plate, 152-second side plate, 153-blocking part, 20-water tank, 21-main body, 22-first interface and 23-second interface.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" generally refer to the orientation shown in FIG. 1. "inner and outer" refer to the inner and outer contours of the respective component itself.

An aspect of the utility model provides an adapter 10 for ventilating treatment equipment, adapter 10 has inlet port 111, be provided with check valve subassembly 13 and pressure relief structure 14 on the adapter 10, check valve subassembly 13 sets up to close pressure relief structure 14 and open inlet port 111 when the user breathes in, and can open pressure relief structure 14 and close inlet port 111 when the user exhales, check valve subassembly 13 includes first valve piece 131 and second valve piece 132, first valve piece 131 is used for opening and closing inlet port 111, second valve piece 132 is used for opening and closes pressure relief structure 14.

In a ventilation therapy device, the adapter 10 is typically mounted on a water tank, the adapter 10 also has an air outlet port 121, the air inlet port 111 of the adapter 10 is typically connected with an air inlet line for supplying air to the water tank, and the air outlet port 121 of the adapter 10 is typically connected with an air outlet line for passing air humidified by the water tank to a use end. When a user inhales, breathable gas enters the adapter 10 from the air inlet pipeline through the air inlet port 111, then enters the water tank through the adapter 10 for humidification, enters the air outlet pipeline through the air outlet port 121, and is communicated to the using end through the air outlet pipeline for the user to inhale. When the user exhales, the exhaled air enters the air outlet pipeline from the using end and then enters the adapter 10 through the air outlet port 121. It will be appreciated that the outlet port 121 is used for exhaust when the user inhales and for intake when the user exhales.

The utility model has the advantages that the one-way valve assembly 13 and the pressure relief structure 14 are arranged on the adapter 10, when a user inhales air, the one-way valve assembly 13 can close the pressure relief structure 14 and open the air inlet port 111, so that the breathable gas can be smoothly introduced, and high-flow ventilation is realized; when a user exhales, the check valve assembly 13 can open the pressure relief structure 14 to close the air inlet 111, so that the breathable gas is prevented from flowing backwards through the air inlet 111, the gas exhaled by the user can be discharged from the pressure relief structure 14, and the breath holding feeling of the user during exhalation is effectively relieved.

Further, the utility model discloses a set up one-way valve subassembly 13 to having the double valve piece (being first valve piece 131 and second valve piece 132), one of them valve piece is responsible for switch inlet port 111 to prevent the gas refluence, another valve piece is responsible for switch pressure relief structure 14, makes one-way valve subassembly 13's function undertake by the valve piece of difference, reduction one-way valve subassembly 13's that can to a great extent machining precision requirement improves the reliability that one-way valve subassembly 13 used.

The utility model discloses in, first valve block 131 and second valve block 132 can be installed in adapter 10 by suitable mode wantonly, as long as can realize respective function can. According to an embodiment of the present invention, as shown in fig. 1, the first valve plate 131 and the second valve plate 132 may be disposed at an interval along the air inlet direction of the air inlet port 111.

To accomplish the mounting of the first and second vanes 131, 132 on the adapter 10, the check valve assembly 13 may further include a valve seat 133, the valve seat 133 being mounted at the intake port 111, and the first and second vanes 131, 132 being mounted in the valve seat 133. Wherein, it can be understood that the installation of the valve seat 133 at the air inlet port 111 should not affect the ventilation of the air inlet port 111, for example, as shown in fig. 1, the valve seat 133 may be inserted at the air inlet port 111, a communication cavity with two open ends may be defined inside the valve seat 133 to communicate the inside and the outside of the adapter 10, and the first valve sheet 131 may close or open the communication cavity of the valve seat 133 to achieve the closing or opening of the air inlet port 111.

The first valve sheet 131 may include a first connection portion 1311 disposed on the valve seat 133 and a first sheet main body 1312 rotatably connected to the first connection portion 1311, and the second valve sheet 132 may include a second connection portion 1321 disposed on the valve seat 133 and a second sheet main body 1322 rotatably connected to the second connection portion 1321. Specifically, as shown in fig. 4 to 7, the first connection portion 1311 and the second connection portion 1321 are mounted to the top of the valve seat 133 at intervals in the air intake direction of the air intake port 111, and the rotation axes of the first sheet body 1312 and the second sheet body 1322 are perpendicular to the air intake direction of the air intake port 111 to rotate between a first position closing the air intake port 111 and opening the pressure relief structure 14 and a second position opening the air intake port 111 and closing the pressure relief structure 14. That is, in the first position, the first sheet body 1312 closes the intake port 111, and the second sheet body 1322 opens the pressure relief structure 14 (see fig. 3); in the second position, the first sheet body 1312 opens the intake port 111, and the second sheet body 1322 closes the pressure relief structure 14 (see fig. 1). When a user inhales, the breathable gas can drive the first valve plate main body 1312 and the second valve plate main body 1322 to rotate clockwise from the first position shown in fig. 3 to the second position shown in fig. 1, the air inlet port 111 is opened (so that the breathable gas is smoothly introduced), and the pressure relief structure 14 is closed (so that the breathable gas is prevented from leaking); when the user exhales, the exhaled air may drive the first valve body 1312 and the second valve body 1322 to rotate counterclockwise from the second position shown in fig. 1 to the first position shown in fig. 3, opening the pressure relief structure 14 (to facilitate the discharge of the exhaled air), and closing the air inlet port 111 (to ensure the one-way flow of the breathable air).

In the above description, since the first valve sheet main body 1312 closes the intake port 111, the first valve sheet main body 1312 requires higher machining accuracy than the second valve sheet main body 1322 in order to ensure sealability with respect to the intake port 111. The first plate body 1312 and the second plate body 1322 may have different structures, and the second plate body 1322 may be, for example, a disk-shaped structure having a through hole as shown in fig. 5, a disk-shaped structure having a notch formed at an edge as shown in fig. 6, or a fan-shaped structure as shown in fig. 7, as long as the second plate body 1322 can open and close the pressure relief structure 14 by rotating. Of course, the second valve sheet body 1322 may have the same structure as the first valve sheet body 1312 (see the structure shown in fig. 4), and in this case, the second valve sheet body 1322 also assumes the function of opening and closing the intake port 111, but the second valve sheet body 1322 does not necessarily have as high a machining accuracy as the first valve sheet body 1312, and the sealing of the intake port 111 is also performed by the first valve sheet body 1312.

According to an embodiment of the middle valve seat 133 of the present invention, as shown in fig. 1-3, the valve seat 133 may be at least partially sleeved in the air inlet 111, the valve seat 133 may include a first cylindrical cavity, a second cylindrical cavity and a third cylindrical cavity (it can be understood that the first cylindrical cavity, the second cylindrical cavity and the third cylindrical cavity constitute a communication cavity in the above description) which are coaxially and sequentially communicated, the diameters of the first cylindrical cavity, the second cylindrical cavity and the third cylindrical cavity are sequentially increased, a first step 1331 is formed between the first cylindrical cavity and the second cylindrical cavity, a second step 1332 is formed between the second cylindrical cavity and the third cylindrical cavity, and the third cylindrical cavity is disposed near the inside of the air inlet 111 (i.e., on the left side shown in fig. 1). In this case, the first vane 131 may be located in the second cylindrical chamber and the second vane 132 may be located in the third cylindrical chamber, and in the first position, the first vane body 1312 is sealed in contact with the end surface of the first step 1331 and the second vane body 1322 is in contact with the end surface of the second step 1332. The first step 1331 and the second step 1332 can realize contact sealing with the first valve plate main body 1312 and the second valve plate main body 1322, and can limit the first valve plate main body 1312 and the second valve plate main body 1322 to prevent the first valve plate main body 1312 and the second valve plate main body 1322 from continuously rotating in a direction away from the second position when the first valve plate main body 1312 and the second valve plate main body 1322 rotate to the first position. In addition, the valve seat 133 can reduce the diameter of the first valve plate main body 1312 by minimizing the diameter of the first cylindrical cavity, so that the requirement on the machining precision of a mold is greatly reduced, the flatness of the first valve plate main body 1312 is better ensured, and the sealing effect is improved.

In the above, the first cylindrical cavity, the second cylindrical cavity and the third cylindrical cavity may be cylindrical cavities or prismatic cavities.

In the above, in order to further improve the contact effect between the first valve sheet main body 1312 and the first step 1331 and between the second valve sheet main body 1322 and the second step 1332 and improve the sealing performance, the end surface of the first step 1331 and the end surface of the second step 1332 may be inclined from top to bottom toward the inside of the intake port 111 (see fig. 2).

The utility model discloses in, as shown in fig. 1 and fig. 3, adapter 10 can include that one end is the first communicating pipe 11 of inlet port 111 and the second communicating pipe 12 of one end for outlet port 121, second communicating pipe 12 is connected with first communicating pipe 11, be provided with the interface 112 that admits air with inlet port 111 intercommunication on the first communicating pipe 11, interface 112 that admits air is used for being connected with the first interface 22 of the water tank 20 of the treatment of ventilating equipment, be provided with the interface 122 of giving vent to anger with outlet port 121 intercommunication on the second communicating pipe 12, interface 122 of giving vent to anger is used for being connected with the second interface 23 of water tank 20. When a user inhales, breathable gas enters the water tank 20 through the air inlet pipeline, the air inlet port 111, the air inlet port 112 and the first port 22 in sequence for humidification, and then is communicated to a using end through the second port 23, the air outlet port 122, the air outlet port 121 and the air outlet pipeline in sequence for inhalation by the user (see arrows in fig. 1); when a user exhales, the exhaled air may sequentially enter the first communication pipe 11 of the adapter 10 through the air outlet pipe, the air outlet port 121, the air outlet port 122, the second port 23, the interior of the water tank 20, the first port 22, and the air inlet port 112, and then be exhausted through the pressure relief structure 14 (see arrows in fig. 3).

According to the utility model discloses in an embodiment of pressure relief structure, pressure relief structure 14 can include pressure relief hole 141, and pressure relief hole 141 can open and establish on the roof that is close to inlet port 111 of first connecting pipe 11, and second valve flap main part 1322 sets up to cover pressure relief hole 141 when the user breathes in to open pressure relief hole 141 when the user exhales.

According to the utility model discloses well pressure relief structure's another embodiment, pressure relief structure 14 can include pressure relief hole 141, and pressure relief hole 141 is seted up on the diapire that is close to inlet port 111 of first connecting pipe 11. In this case, the adapter 10 may include a flip 15, the flip 15 may be rotatably disposed in the first communication pipe 11 and may cover the pressure relief hole 141, and the second valve plate body 1322 may be flipped by rotating the flip 15 to open or cover the pressure relief hole 141. That is, when the second valve plate main body 1322 rotates from the first position to the second position, the turnover member 15 may be driven to turn over to cover the pressure relief hole 141 (see fig. 1); when the second valve plate main body 1322 is rotated from the second position to the first position, the turnover member 15 may be driven to turn over to open the pressure relief hole 141 (see fig. 3).

According to an embodiment of the middle tilting member of the present invention, as shown in fig. 2, the tilting member 15 may be a V-shaped structure formed by a first side plate 151 and a second side plate 152 connected to each other, a rotation axis of the tilting member 15 is parallel to rotation axes of the valve sheet main bodies 1312 and 1322, and the pressure relief hole 141 is covered or opened by the first side plate 151 or the second side plate 152. Here, it can be understood that the center of rotation of the flipper 15 is at the apex of the V, i.e., the junction of the first and second side plates 151 and 152. When the flip 15 is disposed at the left side of the pressure relief hole 141, the pressure relief hole 141 may be covered by the second side plate 152; when the flip 15 is disposed at the right side of the pressure relief hole 141 (see fig. 2), the pressure relief hole 141 may be covered by the first side plate 151. In addition, an included angle between the first side plate 151 and the second side plate 152 may be any suitable angle, and the extension lengths of the first side plate 151 and the second side plate 152 may be equal or unequal, and may be determined according to actual installation and use conditions.

Further, a blocking portion 153 may be disposed on an outer side surface of the first side plate 151 or the second side plate 152, and the blocking portion 153 may further block the pressure relief hole 141 when the first side plate 151 or the second side plate 152 covers the pressure relief hole 141, so as to improve a closing effect of the pressure relief hole 141. That is, when the flip 15 is located on the left side of the pressure relief hole 141, the blocking portion 153 is disposed on the outer side surface of the second side plate 152 (i.e., the side surface facing away from the first side plate 151); when the flip 15 is located on the right side of the pressure relief hole 141, the blocking portion 153 is provided on the outer side surface of the first side plate 151 (i.e., the side surface facing away from the second side plate 152) (see fig. 2).

In addition, in order to further improve the sealing effect on the pressure relief hole 141, as shown in fig. 2, the pressure relief structure 14 may further include a sealing sleeve 142, and the sealing sleeve 142 is sealingly inserted in the pressure relief hole 141 and can be sealingly engaged with the blocking portion 153.

It should be noted that, in the present invention, the check valve assembly 13, the pressure relief structure 14 and the flip-flop 15 may have any suitable structure, and are not limited to the above-described embodiments. The connecting portions 1311, 1321 may be mounted on the valve seat 133 in any appropriate manner, and the shape of the sheet main bodies 1312, 1322 may be adjusted according to the sectional shape of the communicating chamber of the valve seat 133.

The utility model discloses another aspect provides a treatment facility of ventilating, including water tank 20 and above adapter 10, water tank 20 includes that inside is injectd the main part 21 that has the water storage chamber, and adapter 10 connects in main part 21, adapter 10's inlet port 111 and the port 121 and the water storage chamber intercommunication of giving vent to anger.

Wherein, the main body 21 may be provided with a first interface 22 for ventilating the water storage cavity and a second interface 23 for leading out the air humidified by the water storage cavity to be conveyed to a user. The inlet port 112 and the outlet port 122 of the adapter 10 are connected to the first port 22 and the second port 23, respectively.

The utility model discloses in, the treatment of ventilating equipment can be the all-in-one of noninvasive ventilator and high flow humidifying therapeutic instrument, also can install the check valve wantonly, and need carminative treatment of ventilating equipment.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (10)

1. The utility model provides an adapter for ventilating treatment equipment, characterized in that, adapter (10) has inlet port (111), be provided with check valve subassembly (13) and pressure relief structure (14) on adapter (10), check valve subassembly (13) set up to close when the user inhales pressure relief structure (14) and open inlet port (111) to can open when the user exhales pressure relief structure (14) and close inlet port (111), check valve subassembly (13) include first valve block (131) and second valve block (132), first valve block (131) are used for opening and close inlet port (111), second valve block (132) are used for opening and close pressure relief structure (14).

2. The adapter according to claim 1,

the first valve plate (131) and the second valve plate (132) are arranged at intervals along the air inlet direction of the air inlet port (111); and/or

The check valve assembly (13) comprises a valve seat (133), the valve seat (133) is installed at the air inlet port (111), the first valve sheet (131) comprises a first connecting portion (1311) arranged on the valve seat (133) and a first valve sheet main body (1312) rotatably connected to the first connecting portion (1311), the second valve sheet (132) comprises a second connecting portion (1321) arranged on the valve seat (133) and a second valve sheet main body (1322) rotatably connected to the second connecting portion (1321), and the check valve assembly (13) has a first position for closing the air inlet port (111) and opening the pressure relief structure (14) and a second position for opening the air inlet port (111) and closing the pressure relief structure (14).

3. The adapter according to claim 2,

the valve seat (133) is at least partially sleeved in the air inlet port (111), the valve seat (133) comprises a first cylindrical cavity, a second cylindrical cavity and a third cylindrical cavity which are coaxially and sequentially communicated, the diameters of the first cylindrical cavity, the second cylindrical cavity and the third cylindrical cavity are sequentially increased, a first step (1331) is formed between the first cylindrical cavity and the second cylindrical cavity, a second step (1332) is formed between the second cylindrical cavity and the third cylindrical cavity, and the third cylindrical cavity is arranged close to the inside of the air inlet port (111);

in the first position, the first vane body (1312) is in sealing contact with an end face of the first step (1331), and the second vane body (1322) is in contact with an end face of the second step (1332).

4. The adapter according to claim 3, characterized in that the end face of the first step (1331) and the end face of the second step (1332) are inclined from top to bottom towards the inside of the inlet port (111).

5. The adapter according to claim 2,

the adapter (10) comprises a first communication pipe (11) with one end serving as the air inlet (111), the pressure relief structure (14) comprises a pressure relief hole (141), and the pressure relief hole (141) is formed in the bottom wall, close to the air inlet (111), of the first communication pipe (11);

adapter (10) are including upset piece (15), upset piece (15) rotationally set up in first connecting pipe (11) and can cover pressure release hole (141), second valve plate main part (1322) can pass through rotary drive upset piece (15) are overturn in order to open or cover pressure release hole (141).

6. The adapter according to claim 5, characterized in that the flip-flop (15) is a V-shaped structure formed by a first side plate (151) and a second side plate (152) connected, the rotation axis of the flip-flop (15) is parallel to the rotation axis of the first flap body (1312) and the second flap body (1322), and the pressure relief hole (141) is covered or uncovered by the first side plate (151) or the second side plate (152).

7. The adapter according to claim 6, characterized in that a blocking part (153) is provided on an outer side surface of the first side plate (151) or the second side plate (152), wherein the blocking part (153) is capable of further blocking the pressure relief hole (141) when the first side plate (151) or the second side plate (152) covers the pressure relief hole (141).

8. The adapter according to claim 7, wherein the pressure relief structure (14) comprises a sealing sleeve (142), the sealing sleeve (142) being sealingly inserted in the pressure relief hole (141) and being sealingly engageable with the blocking portion (153).

9. The adapter according to any one of claims 5-8, wherein the adapter (10) has an air outlet port (121), the adapter (10) includes a second communication pipe (12) having an end of the air outlet port (121), the second communication pipe (12) is connected to the first communication pipe (11), the first communication pipe (11) is provided with an air inlet interface (112) communicated with the air inlet port (111), the air inlet interface (112) is used for being connected to a first interface (22) of a water tank (20) of the ventilation treatment device, the second communication pipe (12) is provided with an air outlet interface (122) communicated with the air outlet port (121), and the air outlet interface (122) is used for being connected to a second interface (23) of the water tank (20).

10. A ventilation therapy device comprising a water tank (20) and an adapter (10) according to any one of claims 1 to 9, said water tank (20) comprising a body (21) defining a water storage chamber therein, said adapter (10) being connected to said body (21), said air inlet port (111) of said adapter (10) being in communication with said water storage chamber.

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