CN105617527B

CN105617527B - Safety valve and breathing machine

Info

Publication number: CN105617527B
Application number: CN201410621458.9A
Authority: CN
Inventors: 熊志斌; 邬学涛; 陈永辉; 陈培涛
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Shenzhen Mindray Scientific Co Ltd
Current assignee: Shenzhen Mindray Scientific Co Ltd
Priority date: 2014-11-06
Filing date: 2014-11-06
Publication date: 2020-06-02
Anticipated expiration: 2034-11-06
Also published as: CN105617527A

Abstract

The application discloses relief valve and breathing machine, this relief valve include base, driving piece and quick detach subassembly, and this quick detach subassembly includes main gas passage, independently breathes the gas passage and the piece that opens and shuts. Wherein, the autonomic breathing air flue is sealed to extend to the relief valve outside and communicate with external environment. All set up main air flue and autonomic breathing air flue on quick detach subassembly, make air current and base, driving piece separate, contactless completely, reducible or stop in autonomic breathing air flue internal gas stream cluster to base, driving piece or other spare parts in the breathing machine, cause the pollution to these spare parts. And this quick detach subassembly is as the part of the interior and gas direct contact of relief valve, and it can conveniently dismantle again on the base, carries out disinfection and sterilization alone very easily.

Description

Safety valve and breathing machine

Technical Field

The application relates to medical equipment, in particular to a breathing machine and a safety valve thereof.

Background

The respirator is a device which can replace, control or change the normal physiological respiration of a person, increase the ventilation capacity of the lung, improve the respiratory function, reduce the consumption of the respiratory function and save the heart reserve capacity.

Safety valves are a common component of respirators. The pressure control valve assembly belongs to a pressure control valve assembly, can be directly used as a patient inspiration inlet, and has the function of pressure protection of a gas circuit system. The safety valve is in the ventilator circuit system, generally near the inspiratory end of the patient. The upstream is connected with an inspiration flow control system, and the downstream is directly used as a gas output port (namely a patient inspiration port) of the whole machine to be connected with breathing equipment, such as a breathing pipeline, a humidifier, a bacterial filter and the like. Meanwhile, the safety valve is also an active pressure control valve. The device can receive a control instruction from a main engine of the respirator, so that the closing and conducting operations of the closed containing cavity of the safety valve are correspondingly executed, and the aim of limiting the actual pressure of the air circuit system of the respirator to exceed the set pressure value of the main engine of the respirator is fulfilled.

Typically, the safety valve includes a main airway for the patient to inhale air during normal operation of the ventilator and a spontaneous breathing airway for the spontaneous breathing mode. When the breathing machine is in standby or fails or the patient has the consciousness of spontaneous respiration, the safety valve is opened, the spontaneous respiration channel is communicated with the main airway, and the breathing machine mainly prevents the patient from suffocating or adverse effects caused by man-machine confrontation.

In the existing safety valve, a large part of gas in the autonomous breathing airway can be directly released into the whole machine and is not guided out of the whole machine, so that other parts in the machine are polluted, bacteria are bred, and cross infection among different patients is caused. The existing safety valve is of an integral structure, and the whole safety valve needs to be disassembled to clean the safety valve, so that the difficulty of sterilization and disinfection of the safety valve is increased.

Disclosure of Invention

The application provides a relief valve, includes:

a base;

the driving piece is fixed on the base;

and a quick release assembly detachably mounted on the base, comprising:

a main air passage;

the autonomous breathing airway is communicated with the main airway, extends out of the safety valve in a sealing manner and is communicated with the external environment;

and the opening and closing piece is arranged corresponding to the autonomous respiratory airway, and the driving piece drives the opening and closing piece to close or open the autonomous respiratory airway.

As a further improvement of the safety valve, the quick release assembly comprises a valve body on which the shutter is mounted, and the main airway and at least a portion of the autonomous breathing airway are integrated.

As a further improvement of the safety valve, the opening and closing member includes a diaphragm, the valve main body includes an autonomous breathing port and an external passage, the autonomous breathing port and the external passage are openly communicated to form at least a part of the autonomous breathing airway, the opening and closing member is mounted on the valve main body, the opening and closing member is matched with the side wall of the valve main body to seal the autonomous breathing airway at the joint of the autonomous breathing port and the external passage, and the driving member is arranged corresponding to the diaphragm and can drive the diaphragm to deform to communicate or cut off the autonomous breathing airway.

As another improvement of the safety valve, the opening and closing member includes a diaphragm, the quick release assembly further includes a valve main body and an independent pipeline, the main pipeline is disposed on the valve main body, the valve main body has an autonomous respiration opening, the autonomous respiration opening is in open communication with the independent pipeline to form at least a part of the autonomous respiration air passage, one end of the independent pipeline extends out of the safety valve, the opening and closing member is mounted on the valve main body at a position corresponding to the autonomous respiration opening, the opening and closing member is matched with a side wall of the valve main body to close the autonomous respiration air passage at a connection position of the autonomous respiration opening and the independent pipeline, and the driving member is disposed corresponding to the diaphragm and can drive the diaphragm to deform to connect or disconnect the autonomous respiration air passage.

As a further improvement of the safety valve, the driving member is an electromagnet.

As a further improvement of the safety valve, the quick release assembly further comprises a first filter, and the first filter is arranged in the autonomous respiratory airway.

As a further improvement of the safety valve, the external channel is provided with an annular cavity surrounding the main air channel, the quick release assembly further comprises a rotary cover, the rotary cover covers the annular cavity and fixes the first filter in the annular cavity, and the rotary cover is provided with an opening communicated with the external channel.

As a further improvement of the safety valve, the quick release assembly further comprises a sampling port, and the sampling port is communicated with the main air passage.

The application still provides a relief valve, and it includes base and quick detach subassembly, the base is used for fixed mounting in respiratory equipment's frame, quick detach subassembly detachable installs on the base, wherein the quick detach subassembly internal integration has the air flue, the air flue is used for communicateing between patient respiratory and the flow control system.

The application also provides a breathing machine, which comprises a frame, a flow control system and the safety valve according to any one of the embodiments, wherein the base of the safety valve is installed on the frame, and the main air passage of the safety valve is communicated with the flow control system.

The beneficial effect of this application is:

in the application provides a relief valve and breathing machine, the relief valve includes base, driving piece and quick detach subassembly, and this quick detach subassembly includes main gas passage, independently breathes the air flue and the piece that opens and shuts. Wherein, the autonomic breathing air flue is sealed to extend to the relief valve outside and communicate with external environment. Because main air flue and autonomic breathing air flue all set up in quick detach subassembly, make air current and base, driving piece separate, contactless completely, reducible or stop in the autonomic breathing air flue gas stream cluster to base, in driving piece or the breathing machine other spare parts, cause the pollution to these spare parts, in addition this quick detach subassembly as the relief valve with gaseous direct contact's part, it can conveniently dismantle on the base again, realize disinfection and sterilization alone very easily.

Drawings

FIG. 1 is an exploded view of one embodiment of the safety valve of the present application;

FIG. 2 is an exploded view of the electromagnet and base structure of the embodiment shown in FIG. 1;

FIG. 3 is an exploded view of the quick release assembly of the embodiment shown in FIG. 1;

FIG. 4 is a schematic view of the valve body of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the valve body of the embodiment of FIG. 1 assembled with other components;

FIG. 6 is a schematic diagram illustrating control of the check valve to the air passage in the embodiment shown in FIG. 1;

FIG. 7 is a schematic diagram of the gas path of the embodiment shown in FIG. 1;

FIG. 8 is a schematic view of the embodiment of FIG. 1 with the autonomous respiratory airway closed;

FIG. 9 is a schematic diagram of the embodiment of FIG. 1 illustrating the opening of the spontaneous breathing airway (caused by a higher inspiratory pressure during normal operation of the ventilator);

FIG. 10 is a schematic view of the embodiment of FIG. 1 with the spontaneous breathing airway open (as the patient breathes spontaneously);

fig. 11 is a schematic diagram of another embodiment of a safety valve of the present application.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

The first embodiment is as follows:

the present embodiment provides a safety valve.

Referring to fig. 1 and 3, the safety valve includes a base 1, an electromagnet 2, and a quick release assembly 100.

The quick release assembly 100 includes a valve body 3, a shutter 4, a screw cap 5, and a check valve 6.

The base 1 is used for being fixed as the base of whole relief valve in the frame of breathing machine, plays the effect of restraint other components and parts of relief valve. It does not contact any breathing gas and serves only as a fixed support for the quick release assembly 100.

In this embodiment, the base 1 has a mounting cavity 11, and both sides thereof are penetrated. The base 1 can be fixed on the frame through threaded connection, screw fastening or clamping and the like.

The electromagnet 2 is fixed on the base 1, as shown in fig. 2, and can be fixed on the base 1 by adopting a screw locking mode. The electromagnet 2 is positioned in correspondence with the position of the shutter 4, as will be described later.

The quick release assembly 100 is mounted in a mounting cavity 11 of the base 1 in a manner that facilitates disassembly. Such as the fixing modes of screwing, screw locking, clamping and the like.

The quick release assembly 100 has air passages for communication between the patient respiratory system and the flow control system, and the air passages may include a main air passage, a self-contained respiratory air passage, and a sampling air passage, that is, an air passage flowing through the safety valve is disposed in the quick release assembly 100. The quick release assembly 100 is an important link of a ventilator gas circuit system, and plays a role in connecting a ventilator flow control system and a patient respiratory system.

Because the main air passage, the autonomous respiratory air passage and the sampling air passage 34 are not in direct contact with the base 1 and the electromagnet 2, the air flow in the safety valve rarely pollutes the base 1 and the electromagnet 2.

The quick release assembly 100 can be conveniently detached from the base 1 for disinfection and sterilization, such as high-temperature disinfection and sterilization, or wiping disinfection and sterilization liquid.

Specifically, referring to fig. 3-5, the valve body 3 has a main airway 31, an autonomous breathing port 32, an external airway 33, and a sampling airway 34.

The check valve 6 is provided at the air intake end of the main air passage 31 of the valve main body 3, as schematically shown in fig. 6 and 7. The fixing means can be fixed by the snap 61 on the one-way valve 6 fitting the bayonet 35 on the valve body 3.

Of course, other embodiments are possible, such as screwing, etc.

As shown in fig. 6, the check valve 6 is mainly used to allow the airflow to flow from the flow control system to the patient air inlet, so as to prevent the airflow exhaled by the patient from reversely flowing into the upstream of the safety valve to contaminate the upstream components, i.e. to avoid the expansion of the contamination range and reduce the contamination area.

The example check valve 6 employed in this embodiment is of the diaphragm type. However, in actual use, the structure of the check valve 6 is variable as long as it can realize one-way flow in principle, and may be, for example, a ball valve, a cone valve, or the like.

With continued reference to fig. 3, the shutter 4 is of a diaphragm structure, which includes a mounting seat 41 and a diaphragm 42. The diaphragm 42 is fixed to the autonomous respiration opening 32 of the valve body 3 through the mounting seat 41, the autonomous respiration opening 32 is in open communication with the external passage 33, and the mounting seat and the diaphragm combine with the side wall of the valve body 3 to enable the autonomous respiration opening 32 and the external passage to form a complete and sealed autonomous respiration air passage. Wherein, the diaphragm corresponds the setting of independently breathing mouth 32 to under the drive of electro-magnet 2, can produce deformation to independently breathing mouth 32 direction, seal up independently breathing mouth 32.

In this embodiment, a portion of the autonomous respiratory airway is integrated into the valve body, and another portion is formed by the cooperating shutter members. Of course, in other embodiments, the autonomous respiratory airways may be integrated entirely into the valve body, and the shutter may be provided on the autonomous respiratory airways as a control component only, for example, the shutter may employ a valve for airflow control.

As shown in fig. 9 and 10, normally, the membrane 42 is spaced apart from the autonomous breathing orifice 32, and the autonomous breathing orifice 32 is opened to communicate with the autonomous breathing airway.

The electromagnet 2 is arranged corresponding to the membrane 42, and the top rod of the electromagnet is not directly connected with the membrane 42. When the electromagnet 2 is electrified, the ejector rod ejects out, the membrane 42 is ejected to the autonomous respiration opening 32, the autonomous respiration opening 32 is closed, and the autonomous respiration air passage is cut off.

Although the electromagnet 2 is used to drive the main breathing airway to open and close in the present embodiment, in other embodiments, the main breathing airway may be driven by other driving members, such as an air cylinder.

Although the present embodiment employs a diaphragm structure to cut off and open the autonomous respiratory airway, in other embodiments, other opening and closing members may be selected, such as other valves that may be used for airflow control.

With continued reference to fig. 4 and 5, the autonomous respiratory airway of the present embodiment includes an autonomous respiratory orifice 32 and an external passage 33 integrated with the valve body 3.

The outer channel 33 has an annular chamber arranged around the main air duct 31, which chamber can of course be connected directly to the environment. Of course, as in the present embodiment, a first filter 7 may be added to filter the air flow entering the chamber.

Specifically, as shown in fig. 5, the first filter 7 is annular, the first filter 7 is fixed in the annular cavity by a screw cap 5, and the screw cap 5 is provided with an opening communicated with the annular cavity.

The screw cap 5 and the valve body 3 can be fixedly connected by adopting fixing modes such as screwing, locking by screws, buckling and the like.

With continued reference to fig. 4, the sampling air passage 34 is in communication with the main air passage 31 for collecting air in the main air passage for pressure sampling and monitoring. Which in turn may be connected to a second filter (as shown in the schematic of fig. 7) and a pressure sensor (as shown in the schematic of fig. 7).

The air path schematic diagram of the safety valve is shown in fig. 7, and the letter comparison is as follows:

english abbreviation	English full scale	Meaning of Chinese	Chinese commonly used calling method
				FCS	Flow Control System	Flow control system	Flow control system
CV	Check Valve	One-way valve	One-way valve

SV	Solenoid Valve	Electromagnetic valve	Electromagnetic valve
				PS	Pressure Sensor	Pressure sensor	Pressure sensor
F	Filter	Filter	Filter
				SB	Sampling Branch	Sampling branch	Sampling branch

In this embodiment, the electromagnet, the opening/closing member, and the valve main body structure form a combined structure equivalent to the electromagnetic valve, and the electromagnetic valve is used in fig. 7 instead of the combined structure.

The working process of the safety valve is briefly described as follows:

referring to fig. 8, when the electromagnet 2 is powered, the membrane 42 is deformed by the ram of the electromagnet 2 to seal the spontaneous respiration port 32, and the air flow between the spontaneous respiration port 32 and the external channel 33 is cut off, and the air flow direction is as shown by the arrow in fig. 8, at this time, the air of the ventilator moves to the inhalation port of the patient through the main air channel 31.

Referring to fig. 9, when the pressure of the air in the main airway 31 of the ventilator is higher, the ventilator controls the electromagnet 2 to be powered off, the diaphragm 42 is separated from the autonomous respiration opening 32 under the action of the elastic deformation restoring force thereof, so that the diaphragm is communicated with the external channel 33, and the air flow in the main airway 31 flows into the external environment from the autonomous respiration airway, and the direction of the air flow is shown by the arrow in fig. 9.

Referring to fig. 10, in the standby state of the respirator, the electromagnet 2 is powered off by default, and the diaphragm 42 is separated from the autonomous respiration opening 32 by the elastic deformation restoring force thereof, so as to communicate with the external passage 33. At the moment, the patient can suck external fresh gas from the autonomous respiratory airway and exhale from the expiratory valve structure of the respirator.

Alternatively, when the exhalation valve of the ventilator fails to operate properly, the patient can inhale and exhale from the spontaneous respiratory airway by opening the autonomous respiratory orifice 32 by the diaphragm 42 to communicate with the external passage 33.

In this embodiment, the air path is integrated on the quick release assembly 100, so as to isolate the air flow from contacting other components, thereby reducing the number of components contaminated by the air flow, for example, the base 1 and the electromagnet 2 are not in direct contact with the air flow, thereby preventing the bacteria from breeding. The structure which is frequently contacted with the airflow and easily causes the breeding of bacteria can be conveniently disassembled from the base 1, and the disassembly is convenient for sterilization and disinfection.

Meanwhile, the one-way valve 6 is additionally arranged, so that the gas exhaled by the patient can be prevented from further polluting components except the safety valve component in the upstream.

Example two:

referring to fig. 11, the second embodiment provides a safety valve.

The safety valve is different from the first embodiment in that the quick release assembly 100 in the second embodiment includes a separate pipe 8, the separate pipe 8 is fixed on the valve main body 3, and one end of the separate pipe extends to the outside of the safety valve.

When the membrane 42 is not deformed, the autonomous breathing orifice 32 is in sealed communication with the separate conduit 8, for example by adding a seal at the junction.

The independent duct 8 can communicate the main air duct 31 with the external environment, that is, the independent breathing port 32 in the second embodiment communicates with the independent duct 8, so as to form a complete independent breathing air duct. The sealing of the autonomous respiratory airway is realized by adding a sealing element (such as a sealing ring) at the joint.

Example three:

the present embodiment provides a safety valve, which comprises a base and a quick release assembly 100, wherein the base is mounted on a frame of a breathing apparatus, the quick release assembly 100 is detachably mounted on the base, an air passage is integrated in the quick release assembly 100, and the air passage is used for communicating between a breathing system and a flow control system of a patient.

The air passage integrated with the safety valve quick release assembly 100 in the embodiment includes a main air passage, and the main air passage includes an air inlet end;

the air inlet end of the main air passage can be provided with a one-way valve.

Example four: the present embodiment provides a safety valve including an airway for communicating a patient's respiratory system with a flow control system, the airway including an inlet end proximate the flow control system, the inlet end having a one-way valve disposed thereon.

Further, the air passage comprises a main air passage and an autonomous respiratory air passage, the air inlet end is positioned at one end of the main air passage, and the autonomous respiratory air passage is formed by branching from the middle part of the main air passage.

Furthermore, the safety valve comprises a base and a quick-release assembly, the base is used for being installed or fixed on a frame of the breathing equipment, the quick-release assembly is detachably installed on the base, and the air passage is arranged in the quick-release assembly.

Further, the safety valve comprises a driving piece, the quick-release assembly comprises a valve main body and an opening and closing piece, the opening and closing piece is installed on the valve main body, the main air passage and the autonomous breathing air passage are integrated on the valve main body, the opening and closing piece corresponds to the autonomous breathing air passage, and the driving piece controls the opening and closing piece to be communicated with and cut off the autonomous breathing air passage.

Further, the opening and closing member is the diaphragm structure, the valve main part has independently breathes the mouth and connects the outer passageway, the lateral wall cooperation of opening and closing member and valve main part makes independently breathe the mouth with connect the sealed intercommunication of outer passageway, form independently breathes the air flue, driving piece and diaphragm correspond the setting, can order about diaphragm deformation, intercommunication or cut off independently breathes the air flue.

Or, the opening and closing member is of a diaphragm structure, the quick release assembly further comprises a valve main body, an opening and closing member and an independent pipeline, the main air passage is arranged on the valve main body, the valve main body is provided with an autonomous breathing port, the autonomous breathing port is communicated with the independent pipeline in an open mode, one end of the independent pipeline extends out of the safety valve, the opening and closing member is arranged on the valve main body corresponding to the position of the autonomous breathing port, the opening and closing member is matched with the side wall of the valve main body to enable the autonomous breathing port to be communicated with the independent pipeline in a sealing mode to form an autonomous breathing air passage, and the driving member is arranged corresponding to the diaphragm and can drive the diaphragm to deform to communicate or cut off. Further, the driving piece is an electromagnet.

Further, the quick release assembly further comprises a first filter, and the first filter is arranged in the autonomous respiratory airway.

Further, the quick release assembly further comprises a sampling port, and the sampling port is communicated with the main air passage.

Furthermore, the outer channel is provided with a section of annular cavity arranged around the main air channel, the quick release assembly further comprises a rotary cover, the rotary cover covers the annular cavity and fixes the first filter in the annular cavity, and an opening communicated with the outer channel is formed in the rotary cover.

Example five:

in a fifth embodiment, a ventilator includes a frame, a flow control system, and the safety valve shown in any of the above embodiments.

The base of the safety valve is arranged on the frame, and the main air passage of the safety valve is communicated with the flow control system.

The safety valve in the breathing machine can isolate the contact between the air flow and other parts, reduce the number of parts polluted by the air flow, and the main pollution parts of the air flow can be conveniently detached, thereby being convenient for sterilization and disinfection. And can prevent the gas exhaled by the patient from further polluting components in the upstream except the safety valve assembly.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.

Claims

1. A safety valve, comprising:

a base;

the driving piece is fixed on the base;

and a quick release assembly detachably mounted on the base, the quick release assembly comprising:

a main air passage;

the check valve is arranged at the air inlet end of the main air passage;

and the opening and closing piece is arranged corresponding to the autonomous respiratory airway, and the driving piece is sealed and separated from the autonomous respiratory airway and drives the opening and closing piece to close or open the autonomous respiratory airway.

2. The safety valve of claim 1, wherein the quick release assembly comprises a valve body, the shutter member being mounted to the valve body, and the main airway and at least a portion of the autonomous breathing airway being integral to the valve body.

3. The safety valve of claim 2, wherein the opening and closing member comprises a diaphragm, the valve body comprises an autonomous breathing port and an external passage, the autonomous breathing port and the external passage are in open communication to form at least a part of the autonomous breathing airway, the opening and closing member is mounted on the valve body, the opening and closing member cooperates with a side wall of the valve body to close the autonomous breathing airway at a connection position of the autonomous breathing port and the external passage, and the driving member is disposed corresponding to the diaphragm and can drive the diaphragm to deform to connect or disconnect the autonomous breathing airway.

4. The safety valve of claim 1, wherein the opening and closing member comprises a diaphragm, the quick release assembly further comprises a valve body and a separate conduit, the main conduit is disposed on the valve body, the valve body has a self-breathing opening, the self-breathing opening is in open communication with the separate conduit to form at least a portion of the self-breathing conduit, one end of the separate conduit extends out of the safety valve, the opening and closing member is mounted on the valve body at a position corresponding to the self-breathing opening, the opening and closing member cooperates with a sidewall of the valve body to close the self-breathing conduit at a connection between the self-breathing opening and the separate conduit, and the driving member is disposed corresponding to the diaphragm and can drive the diaphragm to deform to connect or disconnect the self-breathing conduit.

5. A safety valve according to claim 3 or claim 4, wherein the actuating member is an electromagnet.

6. The safety valve of claim 1, wherein the quick release assembly further comprises a first filter disposed in the autonomous respiratory airway.

7. The safety valve of claim 3, wherein the quick release assembly further comprises a first strainer, the external passage has an annular cavity surrounding the main passage, the quick release assembly further comprises a screw cap covering the annular cavity and securing the first strainer in the annular cavity, and the screw cap has an opening communicating with the external passage.

8. The safety valve of claim 1, wherein the quick release assembly further comprises a sample port in communication with the main gas gallery.

9. A respirator comprising a frame and a flow control system, further comprising a safety valve according to any one of claims 1 to 8, the safety valve being mounted on the frame at its base, the main airway of the safety valve being in communication with the flow control system.