CN116236669A

CN116236669A - Anti-reflux self-switching ventilation device

Info

Publication number: CN116236669A
Application number: CN202211656600.4A
Authority: CN
Inventors: 王鑫; 李宗阳
Original assignee: Beijing Yian Health Technology Co ltd
Current assignee: Beijing Yian Health Technology Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-06-09

Abstract

The invention discloses a reverse flow prevention self-switching ventilation device, which comprises: host vent, host vent cover, cover seal, host channel seal, diaphragm control device, and humidifier position sensing device: the humidifier position sensing device pushes the membrane control device to move, and the membrane control device controls the inlet membrane to cover the inlet of the through hole and the outlet membrane to cover the outlet of the through hole; or the membrane control device controls the air inlet membrane to cover the air inlet of the humidifier and the air outlet membrane to cover the air outlet of the humidifier. The device can prevent backflow, and the host can be used independently.

Description

Anti-reflux self-switching ventilation device

Technical Field

The invention relates to the technical field of respirators, in particular to an anti-reflux self-switching ventilation device.

Background

The breathing machine has an artificial ventilation function and is widely used for treating diseases such as respiratory failure, sleep apnea-hypopnea syndrome and the like. In dry ambient areas, the ventilator is often provided with humidification because the ventilator directly uses the ventilator to dry the user's nasal cavity, causing other discomfort. The humidification is realized mainly by heating the liquid in the humidifier to evaporate the liquid so as to fuse the water vapor with the air, thereby meeting the humidification requirement.

A ventilator is typically composed of a main unit and a humidifier. The humidifier often has the same air inlet as the host, and in an abnormal state, liquid in the humidifier can enter the host through the air inlet of the humidifier, thereby causing damage to the host. In addition, a passage is also formed between the humidifier and the user side, so that liquid in the humidifier can enter the user side through the air outlet of the humidifier, and discomfort and even other risks are caused to the user. The safety of the respirator is reduced.

In environments with high air humidity, the function of the humidifier may be greatly compromised. There is then a use scenario for a humidifier-free. The first type of breathing machine generally adopts a design of integrating a host machine and a humidifier, and the breathing machine cannot meet the requirement of independent use of the host machine. The second type of breathing machine adopts the gas outlet of the whole machine to be arranged on the humidifier, so that the independent use of the host machine can be realized, but the breathing machine needs to be frequently plugged in and pulled out of a breathing machine pipeline in the process of adding water to the humidifier, and the procedure is complicated.

Disclosure of Invention

The invention aims to provide an anti-reflux self-switching ventilation device, which solves the problem that liquid in a humidifier flows back into a host computer to cause loss to a breathing machine in the prior art; the risk that the humidifier liquid flows into the user side in the prior art is reduced, and the safety performance of the breathing machine is improved. In addition, a solution is provided for the independent use of the host, so that the use scene and portability of the breathing machine are increased.

In order to achieve the above purpose, the invention adopts the following technical scheme:

an anti-reflux self-switching venting device, the anti-reflux self-switching venting device comprising:

host airway: the main machine air duct comprises a main machine air inlet and a main machine air outlet;

main machine air duct cover plate: the main machine air duct cover plate and the main machine air duct are combined together to form a gas transmission channel; the main machine air passage cover plate comprises a humidifier air inlet and a humidifier air outlet;

cover plate seal: the cover plate sealing piece is arranged at the joint of the main machine air duct and the main machine air duct cover plate;

host channel seal: the main machine channel sealing piece is arranged in the main machine air passage, the periphery of the main machine channel sealing piece is communicated with the inner wall of the main machine air passage, and the main machine channel sealing piece is provided with a through hole;

diaphragm control device: an air inlet diaphragm and an air outlet diaphragm are arranged on the diaphragm control device;

humidifier position sensing device: the humidifier position sensing device pushes the membrane control device to move, and the membrane control device controls the inlet membrane to cover the inlet of the through hole and the outlet membrane to cover the outlet of the through hole; or the membrane control device controls the air inlet membrane to cover the air inlet of the humidifier and the air outlet membrane to cover the air outlet of the humidifier.

Preferably, the diaphragm control device adopts a link mechanism.

Further preferably, the link mechanism comprises an air inlet diaphragm rotating rod, an air outlet diaphragm rotating rod, an air inlet diaphragm rotating seat, an air outlet diaphragm rotating seat, a sliding seat, a push rod and a resetting device; an air inlet diaphragm is arranged on the air inlet diaphragm rotating rod, and the bottom end of the air inlet diaphragm rotating rod is arranged on the air inlet diaphragm rotating seat; the air outlet diaphragm rotating rod is provided with an air outlet diaphragm, and the bottom end of the air outlet diaphragm rotating rod is arranged on the air outlet diaphragm rotating seat; one end of the sliding seat is provided with an air inlet diaphragm rotating seat, the other end of the sliding seat is provided with an air outlet diaphragm rotating seat, the sliding seat is arranged on the push rod in a sliding manner, and the push rod is provided with a reset device.

Further, the main machine air passage comprises a first limiting block, and the main machine air passage cover plate comprises a second limiting block;

the diaphragm control device comprises a third limiting block, and the resetting device moves between the first limiting block and the third limiting block.

Preferably, the humidifier position sensing device comprises a sensing rod; the sensing rod is in wedge-shaped fit with the diaphragm control device.

Further preferably, the wedge fit is in the form of a ramp sliding in contact with each other.

Preferably, the air inlet membrane and the air outlet membrane are symmetrically arranged.

Preferably, one or both of the two surfaces of the air inlet membrane and the air outlet membrane are provided with flexible sealing members.

In the using process of the anti-reflux self-switching ventilation device, two ventilation channels exist, wherein the first ventilation channel is formed by a main machine air inlet, a main machine ventilation channel, a through hole of a main machine channel sealing piece and a main machine air outlet; the second air passage is composed of a main machine air inlet, a main machine air passage, a humidifier air inlet, a humidifier air outlet and a main machine air outlet.

According to the invention, the humidifier position sensing device senses the placement position of the humidifier, can control the diaphragm control device, and realizes automatic switching when the first air passage and the second air passage are abnormal when the humidifier is connected.

In the invention, the main machine air passage cover plate and the main machine air passage are combined together to form a gas transmission passage.

In the invention, the main machine channel sealing piece is used for sealing with the main machine air passage, so that the first air passage and the second air passage are mutually independent. (when the first airway is closed, the second airway is closed).

In the invention, the cover plate sealing piece is used for combining the main machine air passage and the main machine air passage cover plate, so that the first air passage is sealed with the outside of the main machine.

The air inlet diaphragm and the air outlet diaphragm are used for sealing the first air passage and the second air passage.

The diaphragm control device can control the movement of the diaphragm, so that the switching between the first air passage and the second air passage is realized.

The resetting device is used for resetting the diaphragm control device.

The main machine airway of the present invention is part of a main machine of a breathing machine, and the main machine is not completely shown in the present invention.

The reset mechanism adopted by the invention is a link mechanism, and it is not easy to think that if other mechanisms are adopted to realize the functions, the protection scope of the scheme is considered.

The air inlet diaphragm and the air outlet diaphragm can be symmetrically arranged or asymmetrically arranged, and the angle and the size of the diaphragm can be controlled by adjusting the length l of the connecting rod of the air inlet diaphragm and the air outlet diaphragm.

The air inlet diaphragm and the air outlet diaphragm can be provided with flexible sealing elements on two sides, and the flexible sealing elements are in the form of assemblies;

the inlet diaphragm and the outlet diaphragm may be provided with flexible sealing elements only on the surfaces of the humidifier, and the surfaces of the inlet diaphragm and the outlet diaphragm connected with the host channel sealing elements may be provided with flat surfaces for direct sealing with the host channel sealing elements (the host channel sealing elements need to be shaped for cooperation).

The host channel sealing member should be provided with a through hole capable of connecting the air inlet and the air outlet of the host.

The humidifier position sensing device can be arranged on the humidifier, can be assembled by multiple parts, and can be a whole piece.

When the humidifier and the host are horizontally distributed, the humidifier position sensing device and the diaphragm control device can be in wedge-shaped fit so as to realize the transformation of the movement direction.

When the humidifier is vertically distributed with the host, the humidifier position sensing device and the diaphragm control device can be in direct contact, and the scheme of the invention is realized through the contact surface.

In the prior art, most respirators still adopt liquid heating to mix water vapor and gas and transmit the water vapor and the gas to a user side together; the unavoidable humidifier has a passage connected to the fan port and to the user side. In abnormal situations (tilting, dumping, etc.) the liquid in the humidifier is at risk of flowing back into the air intake or into the user side, and in order to prevent such risk, the prior art mostly adopts complicated humidifier air path structures, and a larger humidifier volume. Not only increases the processing difficulty of the humidifier, but also increases the cost of the humidifier. The humidifying volume is increased, the whole machine is larger, and the portability is affected. The invention can prevent backflow.

In addition, in certain specific areas, because the air humidity is high, a humidifier is not needed, however, most respirators are integrated with a host and a water tank, so that the purchase cost of the specific areas is increased, and the use scenes of the respirators are reduced. And the host of the present invention can be used alone.

The root cause of the liquid entering the ventilator is the deflection of the ventilator, which results in a back flow of the humidifier liquid (into the main machine side or user side). To overcome the above drawbacks, the present invention proceeds from the root cause of the reverse flow of the humidifier liquid. A humidifier position sensing device and a host air passage mechanism are arranged. Can realize single host computer use, when the humidifier inserts and the host computer takes place unusual simultaneously, can self-closing humidifier air inlet and humidifier gas outlet, solved humidifier refluence problem.

The invention has the following technical progress:

(1) the automatic opening and closing device can separate the humidifiers for independent use, and can realize automatic opening and closing of the air duct without other operations of a user;

(2) when the humidifier is connected and in a normal placing state, the connecting channel between the host and the humidifier is opened, so that the gas can be humidified;

(3) when the humidifier is connected and in an abnormal placement state, the connecting channel between the host and the humidifier is closed, and the internal channel of the host is conducted, so that the liquid in the humidifier is ensured not to return to the host or the user side on the premise that the user uses the breathing machine. When the humidifier returns to the normal placing state, the channel can be automatically opened again to humidify the gas.

Because the anti-reflux is realized mainly by the membrane, more space is not needed for carrying out the anti-reflux water storage of the humidifier, the shape of the humidifier can be simpler, and the volume of the humidifier can be smaller.

Drawings

FIG. 1 is an exploded view of an anti-reflux self-switching venting device of the present invention;

FIG. 2 is a schematic view of a contact platform of a position sensing device of a humidifier according to the invention;

FIG. 3 is a view showing the position sensing device of the humidifier of the present invention detached from the platform;

FIG. 4 is a schematic diagram of a diaphragm control apparatus according to the present invention;

FIG. 5 is a schematic view of the air inlet or outlet membrane according to the present invention;

FIG. 6 is a diagram showing the movement of the inlet and outlet membranes during abnormal conditions of the anti-reflux self-switching ventilation device of the present invention;

FIG. 7 is a diagram showing the movement of the inlet and outlet membranes during normal conditions of the anti-reflux self-switching venting device of the present invention;

FIG. 8 is an abnormal state diagram of the anti-reflux self-switching ventilator of the present invention;

in fig. 8: a is an inclined state diagram of the anti-reflux self-switching ventilation device; b is an inverted state diagram of the anti-reflux self-switching ventilation device; c is a state diagram of a separation platform of the anti-reflux self-switching ventilation device;

FIG. 9 is a state diagram of a placement platform of the anti-reflux self-switching aerator of the present invention;

FIG. 10 is a first airway passage diagram of an anti-reflux self-switching airway device according to the present invention;

FIG. 11 is a second ventilation path conduction diagram of the anti-reflux self-switching ventilation device of the present invention;

FIG. 12 is a first airway passage of an anti-reflux self-switching airway device according to the present invention;

FIG. 13 is a diagram of a diaphragm structure of the present invention;

FIG. 14 is a diagram illustrating a stopper configuration of a diaphragm control apparatus according to the present invention;

reference numerals:

1. a main machine air duct; 2. a main machine air duct cover plate; 3. a host channel seal; 4. an air intake diaphragm; 5. an air outlet membrane; 6. a humidifier position sensing device; 7. a diaphragm control device; 7-1, an air inlet diaphragm rotating rod; 7-2, rotating the air outlet membrane; 7-3, an air inlet diaphragm rotating seat; 7-4, an air outlet diaphragm rotating seat; 7-5, sliding seat; 7-6, pushing rod; 8. a reset device; 9. a cover plate seal; 10. a platform; 11. a first limiting block; 12. and a third limiting block.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

Example 1

As shown in fig. 1, 4, 5, 13, an anti-reflux self-switching aerator, comprising:

host airway 1: the main machine air duct 1 comprises a main machine air inlet and a main machine air outlet;

host airway cover 2: the main machine air passage cover plate 2 and the main machine air passage 1 are combined together to form a gas transmission passage; the main machine airway cover plate 2 comprises a humidifier air inlet and a humidifier air outlet;

cover plate seal 9: the cover plate sealing piece 9 is arranged at the joint of the main machine air duct 1 and the main machine air duct cover plate 2;

host channel seal 3: the main machine channel sealing piece 3 is arranged in the main machine air passage 1, the periphery of the main machine channel sealing piece 3 is in sealing connection with the inner wall of the main machine air passage 1, and the main machine channel sealing piece 3 is communicated with a through hole;

diaphragm control device 7: an air inlet diaphragm 4 and an air outlet diaphragm 5 are arranged on the diaphragm control device 7;

humidifier position sensing device 6: the humidifier position sensing device 6 pushes the membrane control device 7 to move, and the membrane control device 7 controls the inlet membrane 4 to cover the inlet of the through hole and the outlet membrane 5 to cover the outlet of the through hole; or the membrane control device 7 controls the air inlet membrane 4 to cover the air inlet of the humidifier and the air outlet membrane 5 to cover the air outlet of the humidifier.

The diaphragm control device 7 adopts a link mechanism.

The connecting rod mechanism comprises an air inlet diaphragm rotating rod 7-1, an air outlet diaphragm rotating rod 7-2, an air inlet diaphragm rotating seat 7-3, an air outlet diaphragm rotating seat 7-4, a sliding seat 7-5 and a push rod 7-6; an air inlet diaphragm 4 is arranged on the air inlet diaphragm rotating rod 7-1, and the bottom end of the air inlet diaphragm rotating rod 7-1 is arranged on the air inlet diaphragm rotating seat 7-3; the air outlet diaphragm rotating rod 7-2 is provided with an air outlet diaphragm 5, and the bottom end of the air outlet diaphragm rotating rod 7-2 is arranged on the air outlet diaphragm rotating seat 7-4; one end of the sliding seat 7-5 is provided with an air inlet diaphragm rotating seat 7-3, the other end of the sliding seat is provided with an air outlet diaphragm rotating seat 7-4, the sliding seat 7-5 is arranged on the push rod 7-6 in a sliding manner, and the push rod 7-6 is connected with the reset device 8.

As shown in fig. 13, the angle and size of the membrane can be controlled by adjusting the length l of the inlet membrane rotating seat 7-3 and the outlet membrane rotating seat 7-4. And l is the distance between the center point of the connection position of the rotating rod and the rotating seat and the center point of the connection position of the rotating seat and the sliding seat. The rotating seat is rotationally connected with the sliding seat, and the rotating rod is rotationally connected with the rotating seat.

As shown in fig. 14, the main air duct includes a first limiting block 11, and the main air duct cover includes a second limiting block; the diaphragm control device is defined between the first limiting block and the second limiting block; the diaphragm control device comprises a third limiting block 12, and the reset device 8 moves between the first limiting block and the third limiting block.

The humidifier position sensing device 6 comprises a sensing rod; the sensing rod is in wedge fit with the diaphragm control device 7.

The wedge fit is in the form of a ramp sliding in contact with each other.

The air inlet diaphragm 4 and the air outlet diaphragm 5 are symmetrically arranged.

One or both of the two surfaces of the air inlet membrane 4 and the air outlet membrane 5 are provided with flexible sealing elements.

As shown in fig. 2-3, there are three states of the humidifier position sensing device: the state of uninstallation (humidifier position sensing device is a part of humidifier, and the breathing machine host computer is used alone at this moment), the normal state of installation (contact platform state), the abnormal state of installation (break away from platform state). When the humidifier is not installed, the diaphragm control apparatus is in an initial position, at which the first passage is opened and the second passage is closed. When the humidifier is normally installed, the diaphragm control device is in the second position, and at the moment, the first channel is closed, and the second channel is opened. When the humidifier is abnormally installed, the diaphragm control device is at an initial position, and at the moment, the first channel is opened, and the second channel is closed.

As shown in fig. 4-5, the reset device will cause the diaphragm control apparatus to remain in the initial position without being affected by external forces. When the whole machine contacts the placement platform, the humidifier position sensing device moves upwards due to the action of gravity. When the diaphragm control device is pushed by the humidifier position sensing device, the diaphragm control device moves from the initial position to the second position, and the resetting device is compressed. Simultaneously, the membrane control device drives the air inlet membrane rotating rod 7-1 and the air outlet membrane rotating rod 7-2 to move, so that the air inlet membrane rotating rod 7-1 and the air outlet membrane rotating rod 7-2 rotate, and the air inlet membrane and the air outlet membrane are respectively covered at two ends of a through hole of the host passage sealing piece 3 to seal the host passage sealing piece 3. So that the whole ventilation system is changed from the first passage to the second passage, and the state is judged as the normal state of the humidifier position. On the contrary, when the whole machine leaves the placement platform, the system loses the influence of the gravity of the whole machine, at the moment, the resetting device can be restored to the original state, and at the moment, the diaphragm control device 7 moves from the second position to the initial position, so that the humidifier position sensing device 6 protrudes (protruding means herein is lower than any component except the component of the whole machine). So that the whole ventilation system is changed from the second passage to the first passage, and the state is judged as the abnormal state of the humidifier position.

As shown in the motion schematic diagram of fig. 6 (moving from the initial position to the second position), when the humidifier position sensing device 7 contacts the placement platform 10 and moves upwards, the membrane control device 7 is driven to move from the initial position to the second position, and the reset device 9 is compressed. Meanwhile, the membrane control device drives the air inlet membrane 4 and the air outlet membrane 5 to rotate until the air inlet membrane 4 and the air outlet membrane 5 are respectively sealed with two ends of the main machine channel sealing piece 3, at the moment, the first air passage is closed, the second air passage is opened, and at the moment, the position of the humidifier is judged to be normal.

As shown in the motion diagram of fig. 7 (moving from the second position to the initial position), the humidifier position sensing device 7 is separated from the placement platform 10. At this time, the resetting device 9 will change from the compressed state to the initial state, and will drive the diaphragm control device 7 to move from the second position to the initial position, and simultaneously make the humidifier position sensing device 6 move to the second position, and at this time, it is determined that the position of the ventilator is abnormal.

When the host computer is used alone, the resetting device enables the diaphragm control device to return to an initial position, the initial position is that the air inlet diaphragm is sealed with the air inlet of the humidifier and the air outlet diaphragm is sealed with the air outlet of the humidifier, the first air passage is communicated, and the second air passage is closed. The air is transmitted to the user end from the host air outlet on the host air passage through the host air inlet on the host air passage and the host passage sealing piece.

When the humidifier is connected with the host computer, the humidifier position sensing device is in contact with the placing platform, and the humidifier position sensing device judges that the position of the humidifier is in a normal state. At the moment, the humidifier sensing device compresses the resetting device, the resetting device drives the diaphragm control device to a second position, the second position is that the air inlet diaphragm is sealed with the main machine channel sealing piece and the air outlet diaphragm is sealed with the main machine channel sealing piece, at the moment, the second air passage is communicated, and the first air passage is closed. The air enters the humidifier air inlet on the main machine air passage through the main machine air inlet on the main machine air passage, passes through the humidifier and is transmitted to the user end through the main machine air outlet on the main machine air passage through the humidifier air outlet on the main machine air passage.

As shown in fig. 8, when the humidifier is connected to the host, the host tilts (e.g., a in fig. 8), overturns (e.g., b in fig. 8), lifts (e.g., c in fig. 8), etc., the humidifier position sensing device leaves the placement platform, the humidifier is determined to be in an abnormal state, the resetting device ejects the humidifier position sensing device, and the resetting device drives the membrane control device to return to the initial position, at this time, the first air passage is turned on, and the second air passage is closed. The gas is transmitted from the host gas outlet on the host air passage to the user side through the host gas inlet on the host air passage and through the host passage sealing member, as shown in fig. 9, 10 and 12, wherein the left side view of fig. 9 is a front view, the upper right side view of fig. 9 is a front view without the humidifier position sensing device, and the lower right side view of fig. 9 is A-A view of the upper right side view of fig. 9; the upper left view of fig. 10 is a front view, the lower left view of fig. 10 is an A-A view of the upper left view of fig. 10, and the right side view of fig. 10 is a left view of the upper left view of fig. 10; the upper left view of fig. 12 is a front view, the lower left view of fig. 12 is an A-A view of the upper left view of fig. 12, and the right side view of fig. 12 is a left view of the upper left view of fig. 12. When the humidifier is connected with the host computer and recovers from an abnormal state, the breathing machine is contacted with the placement platform again, at the moment, the humidifier sensing device compresses the resetting device again, the resetting device drives the diaphragm control device to a second position, the second position is that the air inlet diaphragm is sealed with the host computer channel sealing piece and the air outlet diaphragm is sealed with the host computer channel sealing piece, at the moment, the second air passage is communicated, and the first air passage is closed. The air enters the humidifier air inlet on the main machine air passage through the main machine air inlet on the main machine air passage, passes through the humidifier and is transmitted to the user end through the humidifier air outlet on the main machine air passage through the main machine air outlet on the main machine air passage, as shown in fig. 11, the upper left image of fig. 11 is a front view, the lower left image of fig. 11 is A-A view of the upper left image of fig. 11, and the right image of fig. 11 is a left view of the upper left image of fig. 11. (this part is the same as the host in normal state).

The invention may be practiced without these specific details, using any knowledge known in the art.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.

Claims

1. An anti-reflux self-switching venting device, comprising:

2. The anti-reflux self-switching venting device of claim 1 wherein the diaphragm control means employs a linkage mechanism.

3. The anti-reflux self-switching venting device of claim 2, wherein the linkage mechanism comprises an inlet membrane rotating rod, an outlet membrane rotating rod, an inlet membrane rotating seat, an outlet membrane rotating seat, a sliding seat, a push rod and a resetting device; an air inlet diaphragm is arranged on the air inlet diaphragm rotating rod, and the bottom end of the air inlet diaphragm rotating rod is arranged on the air inlet diaphragm rotating seat; the air outlet diaphragm rotating rod is provided with an air outlet diaphragm, and the bottom end of the air outlet diaphragm rotating rod is arranged on the air outlet diaphragm rotating seat; one end of the sliding seat is provided with an air inlet diaphragm rotating seat, the other end of the sliding seat is provided with an air outlet diaphragm rotating seat, the sliding seat is arranged on the push rod in a sliding manner, and the push rod is provided with a reset device.

4. The anti-reflux self-switching venting device of claim 3, wherein the primary airway comprises a first stopper and the primary airway cover comprises a second stopper;

5. The anti-reflux self-switching venting device of claim 1 wherein the humidifier position sensing device comprises a sensing rod; the sensing rod is in wedge-shaped fit with the diaphragm control device.

6. The anti-reflux self-switching venting device of claim 5 wherein the wedge fit is in the form of a ramp sliding in contact with each other.

7. The anti-reflux self-switching venting device of claim 1, wherein the inlet membrane is symmetrically disposed with the outlet membrane.