CN116764051A - Breathing machine - Google Patents

Abstract

The application relates to a breathing machine, which comprises an inhalation module, an exhalation module and a gas supply module, wherein the inhalation module is used for transmitting breathing media; the exhalation module includes a negative pressure generator capable of creating a negative pressure to assist exhalation; the gas supply module is connected with the inspiration module to provide breathing medium to the inspiration module. The air suction module can transmit the air transmitted by the air supply module to a user so as to provide breathing media required by breathing for the user. The negative pressure generator included in the expiration module can form negative pressure when the gas flows through so as to achieve the effect of assisting the user to exhale. Therefore, the expiration time is reduced, and the expiration process of a user can be matched with high-frequency ventilation, so that the effect of the ventilator in high-frequency ventilation is improved.

Description

Breathing machine

Technical Field

The application relates to the technical field of medical appliances, in particular to a breathing machine.

Background

A ventilator is a medical device that can partially or completely replace autonomous ventilation of a human body, and is generally used in cases where assisted breathing is required, such as anesthesia and breathing management during a respiratory failure patient or operation. As ventilators develop, high frequency ventilators are increasingly emerging. High frequency ventilators use significantly higher frequencies than physiological respiratory frequencies, and very low tidal volumes for ventilation, to accommodate open lung trauma and severe lung leakage patients.

However, current high-frequency ventilators do not provide good ventilation when high-frequency ventilation is achieved.

Disclosure of Invention

Based on this, it is necessary to provide a ventilator in order to solve the problem of how to improve the ventilation effect of a high-frequency ventilator.

A ventilator, the ventilator comprising:

an inhalation module for delivering a respiratory medium;

an exhalation module including a negative pressure generator capable of forming a negative pressure to assist exhalation;

and the gas supply module is connected with the inspiration module to provide breathing medium for the inspiration module.

In one embodiment, the negative pressure generator is capable of forming a negative pressure when gas flows through, the gas supply module connects the inhalation module and the exhalation module in parallel, and the gas supply module supplies gas to the inhalation module and the exhalation module, respectively, to form a respiratory cycle.

In one embodiment, the gas supply module forms the predetermined frequency of the breathing cycle to be higher than a normal physiological breathing frequency.

In one embodiment, the gas supply module comprises a gas source module, a first gas tank, a pressure reducing valve and a second gas tank which are sequentially connected in series; the gas source module is used for providing gas for the first gas tank and the second gas tank; the first gas tank and the second gas tank are both used for storing gas; the pressure reducing valve is used for reducing the pressure of the gas flowing to the second gas tank; the expiration module is connected with the first air tank, and the inspiration module is connected with the second air tank.

In one embodiment, the air supply module comprises an air supply module, the air supply module comprises a high-pressure air source and a first electromagnetic valve which are sequentially connected, the first electromagnetic valve is connected with the first air tank, the first electromagnetic valve conducts and cuts off the air supply module at the preset frequency, and the first air tank supplies air to the expiration module when the first electromagnetic valve cuts off;

the air source module further comprises an oxygen supply module, the oxygen supply module comprises a high-pressure oxygen source second electromagnetic valve which is sequentially connected, the second electromagnetic valve is connected with the second air tank, the second electromagnetic valve is synchronously conducted with the first electromagnetic valve at the preset frequency and cuts off the oxygen supply module, and the first air tank supplies air to the expiration module when the second electromagnetic valve cuts off.

In one embodiment, the inhalation module comprises a first inhalation module comprising a proportional valve for regulating the flow and pressure of the breathing medium provided by the first inhalation module to the user, the proportional valve being turned on and off at the preset frequency in synchronization with the gas supply module.

In one embodiment, the first inhalation module further comprises a humidifier connected to the proportional valve, the humidifier being configured to humidify the breathing medium delivered by the first inhalation module.

In one embodiment, the air suction module comprises a second air suction module which is parallel to the first air suction module, the second air suction module comprises an atomization electromagnetic valve and an atomizer, the atomization electromagnetic valve is connected between the gas supply module and the atomizer to enable the second air suction module to be conducted or cut off, and the atomizer is used for adding aerosol into the breathing medium transferred by the second air suction module.

In one embodiment, the exhalation module includes a third solenoid valve connected between the gas supply module and the negative pressure generator, the third solenoid valve having a conducting state and a blocking state opposite and synchronized to the conducting state and the blocking state of the proportional valve.

In one embodiment, the exhalation module further includes an exhalation valve, the exhalation valve is connected between the negative pressure generator and the external environment, the exhalation valve is turned on and off at the preset frequency, and the on state and the off state of the exhalation valve are opposite to the on state and the off state of the proportional valve.

In the respirator, the air suction module can transmit the air transmitted by the air supply module to a user so as to provide a breathing medium required by breathing for the user. The negative pressure generator included in the expiration module can form negative pressure when the gas flows through so as to achieve the effect of assisting the user to exhale. Therefore, the expiration time is reduced, and the expiration process of a user can be matched with high-frequency ventilation, so that the effect of the ventilator in high-frequency ventilation is improved.

Drawings

Fig. 1 is a schematic block diagram of a ventilator according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram of the ventilator shown in fig. 1.

Fig. 3 is a schematic circuit diagram of a gas supply module in the ventilator shown in fig. 2.

Fig. 4 is a schematic circuit diagram of an inhalation module in the ventilator of fig. 2.

Fig. 5 is a schematic circuit diagram of an exhalation module in the ventilator of fig. 2.

Reference numerals: 10. a ventilator; 100. a suction module; 110. a first air suction module; 111. a proportional valve; 112. a second flow sensor; 113. an emergency suction valve; 114. an oxygen concentration sensor; 115. a safety valve; 116. an air suction one-way valve; 117. a humidifier; 118. a water accumulation cup; 120. a second getter module; 121. an atomization electromagnetic valve; 122. an atomizer; 200. an exhalation module; 210. a negative pressure generator; 220. a third electromagnetic valve; 230. a pressure regulating valve; 240. a second pressure sensor; 250. a voice coil motor; 260. a drain valve; 270. a third flow sensor; 300. a gas supply module; 310. an air source module; 3110. an air supply module; 3111. an air inlet; 3112. a first electromagnetic valve; 3113. a steam-water separator; 3114. an air filter; 3115. an air pressure sensor; 3116. an air check valve; 3120. an oxygen supply module; 3121. an oxygen inlet; 3122. a second electromagnetic valve; 3123. an oxygen filter; 3124. an oxygen pressure sensor; 3125. an oxygen one-way valve; 320. a first gas tank; 330. a pressure reducing valve; 340. a second gas tank; 350. a first flow sensor; 360. a first pressure sensor; 370. a pressure release valve; 400. and a connection structure.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The present inventors have found that the ventilation method of a ventilator of the conventional art involves the use of a positive pressure to deliver gas to the user to cause the patient to complete the inhalation process. For the exhalation process, the ventilator stops providing gas to the user, at which time the user's lungs have a relatively large pressure, so based on the pressure differential, the lungs can contract to effect the exhalation process. However, due to the high ventilation frequency at high frequency ventilation, it is difficult for the user's lungs to automatically contract during exhalation to match the higher ventilation frequency, resulting in poor high frequency ventilation.

In order to solve the above problems, the present application provides a ventilator, which includes an inhalation module, an exhalation module, and a gas supply module, wherein the gas supply module is capable of supplying gas to the inhalation module and the exhalation module respectively at a frequency higher than a normal respiratory frequency. The exhalation module includes a negative pressure generator that is capable of forming a negative pressure as the gas flows therethrough. When the gas supply module supplies gas to the gas suction module, the gas suction module can transmit the gas to a user to realize a gas suction process; when the gas supply module supplies gas to the expiration module, the negative pressure generator forms negative pressure to assist the user in expiration, so that the expiration process of the patient can be matched with ventilation with high frequency. Because the positive pressure and the negative pressure are directly related to the gas supply module, the matching degree of the high-frequency ventilation of the gas supply module between the inhalation process and the exhalation process of the user can be improved, so that the high-frequency ventilation effect can be improved. For ease of understanding and description, the ventilator provided by the present application will be described in detail below with reference to the drawings and detailed description.

It should be noted that, in each embodiment, the inhalation and exhalation are directed to the user. For example, inhalation refers to inhalation by a user, and is not intended to limit the inhalation or evacuation of gas by the associated components themselves, and the same applies to exhalation. The high frequency described in the various embodiments refers to higher than normal physiological respiratory rate, with normal physiological respiratory rate of adults ranging from 12 to 20 times per minute.

Referring to fig. 1, an embodiment of the present application provides a ventilator 10, which includes an inhalation module 100, an exhalation module 200, and a gas supply module 300. Inhalation module 100 is used to deliver a breathing medium for breathing by a user. The exhalation module 200 includes a negative pressure generator 210, the negative pressure generator 210 being capable of creating a negative pressure to assist exhalation. The gas supply module 300 is connected to the inhalation module 100 to provide a breathing medium to the inhalation module 100.

In the ventilator 10, the inhalation module 100 can deliver the gas from the gas supply module 300 to the user to provide the breathing medium required for breathing. The negative pressure generator 210 included in the exhalation module 200 can generate negative pressure when the gas flows therethrough, so as to achieve the effect of assisting the user in exhaling. Thus, exhalation time is reduced, and the user's exhalation process can be matched to high frequency ventilation to enhance the effectiveness of ventilator 10 in high frequency ventilation.

It should be noted that, the negative pressure generated by the negative pressure generator 210 means that the negative pressure generator 210 can relatively reduce the pressure of the user. Instead of exhaling by means of automatic retraction of the user's lungs in the transmission technique, the air supply module 300 in combination with the negative pressure generator 210 in the embodiments can form a negative pressure at the user to actively guide the user to exhale. Thus, exhalation time is reduced, and the user's exhalation process can be matched to high frequency ventilation to enhance the effectiveness of ventilator 10 in high frequency ventilation.

That is, when the ventilation frequency of the gas supply module 300 is higher than the normal physiological respiratory frequency, since the exhalation module 200 assists the user to exhale in a manner of forming the negative pressure, the matching degree of the user's exhaling process and the high-frequency ventilation can be improved, so that the effect of the high-frequency ventilation can be improved.

Referring to fig. 1 and 3, in one embodiment, the ventilator 10 includes a connection structure 400, the connection structure 400 being configured to connect with a user. The inhalation module 100 is connected to the connection structure 400, the inhalation module 100 being adapted to conduct a breathing medium to the connection structure 400 for ventilation to a user via the connection structure 400. The exhalation module 200 is also connected to the connection 400, and the negative pressure generator 210 is capable of creating a negative pressure at the connection 400 to assist the user in exhaling. Since the connection structure 400 is connected to the user, the air suction module 100 forms a positive pressure at the connection structure 400, that is, a positive pressure at the user end; similarly, the exhalation module 200 creates a negative pressure at the connection 400, i.e., at the user end. For ease of understanding, the following description is presented in terms of a user terminal.

When the ventilator 10 is a noninvasive ventilator 10, the connection 400 may be a mask, a nasal mask, or the like. When the ventilator 10 is an invasive ventilator 10, the connection structure 400 may be a cannula or the like.

Referring to fig. 1 to 3, in one embodiment, the negative pressure generator 210 is capable of forming a negative pressure as the gas flows therethrough. The gas supply module 300 connects the inhalation module 100 and the exhalation module 200 in parallel, and the gas supply module 300 supplies gas to the inhalation module 100 and the exhalation module 200, respectively, to form a respiratory cycle. That is, the inhalation module 100 generates positive pressure at the user side, similar to the way the exhalation module 200 generates negative pressure at the user side, by the gas of the gas supply module 300. The positive pressure and the negative pressure are formed in the same way, so that two different sets of devices are not needed to form the positive pressure and the negative pressure respectively, and the structure of the breathing machine 10 can be simplified; on the other hand, the process of forming the positive pressure and the negative pressure is directly related to the gas supply module 300, so that the high-frequency ventilation can be realized by switching the gas path at a high frequency, that is, the manner of realizing the high-frequency ventilation of the ventilator 10 can be simplified.

For example, in one embodiment, the gas supply module 300 forms a preset frequency of respiratory cycles that is higher than the normal physiological respiratory frequency. At this time, the gas supply module 300 can alternately form positive pressure and negative pressure at a high frequency at the user side, thereby improving the effect of the ventilator 10 when ventilating the user at the high frequency. It will be appreciated that the appropriate preset frequency may be set to adjust mean airway pressure within the ventilator airway circuit depending on the particular circumstances of the user. The mean airway pressure refers to the average pressure experienced by the lungs during the respiratory cycle.

Of course, the gas supply module 300 may also be configured to ventilate the user at a frequency equal to or lower than the normal physiological breathing rate. I.e. the preset frequency can be set equal to or lower than the normal physiological breathing frequency.

In one embodiment, the negative pressure generator 210 may be an ejector. Ejectors, also known as ejectors, jet vacuum pumps, jet vacuum ejectors, etc., are vacuum harvesters that utilize a fluid to transfer energy and mass. Of course, the negative pressure generator 210 is not limited to be an ejector, and for example, the negative pressure generator 210 may be other components that obtain negative pressure using the bernoulli principle.

Of course, in some embodiments, the negative pressure generator 210 may also employ other devices capable of creating a negative pressure to create a negative pressure independently. That is, the negative pressure generator 210 may independently form a negative pressure without being associated with the gas supply module 300. For ease of understanding, the following description will be given taking the negative pressure generator 210 generating negative pressure under the action of the gas supplied from the gas supply module 300 as an example.

Referring to fig. 2 and 3, in one embodiment, the gas supply module 300 includes a gas source module 310, a first gas tank 320, a pressure reducing valve 330, and a second gas tank 340 connected in series, wherein the pressure reducing valve 330 is disposed between the first gas tank 320 and the second gas tank 340. The gas source module 310 is configured to provide gas to the first gas tank 320 and the second gas tank 340. The first gas tank 320 and the second gas tank 340 are each used to store gas. The pressure reducing valve 330 is used to reduce the pressure of the gas flowing to the second gas tank 340. The exhalation module 200 is connected to the first gas tank 320, and the inhalation module 100 is connected to the second gas tank 340, whereby the pressure of the gas flowing from the first gas tank 320 to the second gas tank 340 can be reduced by the pressure reducing valve 330. It will be appreciated that the exhalation module 200 needs to use flowing gas to form a negative pressure, and parameters such as pressure, flow rate, etc. of the flowing gas have a positive correlation with the negative pressure that can be obtained by the negative pressure generator 210, so that the first gas tank 320 is closer to the gas source module 310 than the second gas tank 340 in the loop connection, and the exhalation module 200 is connected to the first gas tank 320, which can facilitate the exhalation module 200 to obtain a gas flow with a higher pressure and flow rate, and facilitate the formation of the required negative pressure.

And the second gas tank 340 is connected to the air intake module 100, the pressure of the gas flowing to the second gas tank 340 can be adjusted by providing the pressure reducing valve 330 in the first gas tank 320 and the second gas tank 340 so that the pressure can be adjusted to a level suitable for human reception, improving the applicability of the air intake module 100.

In one embodiment, the gas source module 310 is turned on and off at a predetermined frequency. The first air tank 320 can provide the air flow for obtaining the negative pressure to the exhalation module 200 when the air source module 310 is in phase.

In one embodiment, because the high pressure gas is delivered in the gas source module 310, the high pressure gas tends to have a higher temperature during flow. In each embodiment, the first gas tank 320 and the second gas tank 340 are connected between the gas suction module 100 and the gas source module 310, so that the buffer function can be achieved, and the temperature of the gas supplied to the user by the gas suction module 100 is suitable.

Referring to fig. 3, in one embodiment, the air source module 310 includes an air supply module 3110 and an oxygen supply module 3120, i.e. a breathing medium formed by mixing air and oxygen for the user to breathe. The air supply module 3110 is connected to the first air tank 320 in parallel with the oxygen supply module 3120.

The air supply module 3110 includes a high pressure air source and a first solenoid valve 3112 connected in sequence. The first solenoid valve 3112 is connected to the first canister 320, and the first solenoid valve 3112 periodically turns on and off the air supply module 3110 at a predetermined frequency, thereby establishing a frequency for high-frequency ventilation of the ventilator 10. The first gas tank 320 supplies gas to the exhalation module 200 when the first solenoid valve 3112 is cut off, so that the negative pressure generator 210 can form a negative pressure that assists exhalation at the user end. The high pressure air source may specifically be in communication with other components of the air supply module 3110 through the air inlet 3111.

The gas source module 310 includes an oxygen supply module 3120, the oxygen supply module 3120 includes a high pressure oxygen source and a second solenoid valve 3122 which are sequentially connected, the second solenoid valve 3122 is connected with the second gas tank 340, and the second solenoid valve 3122 periodically turns on and off the oxygen supply module 3120 at a preset frequency in synchronization with the first solenoid valve 3112, thereby forming a frequency at which the ventilator 10 is ventilated at a high frequency. The first gas tank 320 supplies gas to the exhalation module 200 when the second solenoid valve 3122 is truncated. The high pressure oxygen source may specifically be in communication with other components of the oxygen supply module 3120 through the oxygen inlet 3121.

It can be appreciated that the first solenoid valve 3112 and the second solenoid valve 3122 are synchronously turned on or off at a predetermined frequency, so that the gas source module 310 is periodically turned on or off as a whole. The first solenoid valve 3112 and the second solenoid valve 3122 are synchronously turned on or off, so that the air source module 310 is entirely turned on or off. When the gas source module 310 is cut off, since the gas still exists in the first gas tank 320, the gas can be supplied to the negative pressure generator 210 through the first gas tank 320 so as to form a negative pressure for assisting in exhaling at the end of the user.

In one embodiment, the source of high pressure air and high pressure oxygen may be an exhaust fan or a high pressure vessel of gas, or the like. By providing the first and second cylinders 320, 340 connected between the inspiration module 100 and the source module 310, it is also possible to facilitate the thorough mixing of air and oxygen to form the desired breathing medium.

Referring to fig. 3, in one embodiment, the air supply module 3110 further includes a steam-water separator 3113, an air filter 3114, an air pressure sensor 3115 and an air check valve 3116, and the steam-water separator 3113, the air filter 3114, the air pressure sensor 3115 and the air check valve 3116 are connected between the air inlet 3111 and the first solenoid valve 3112 in sequence. The provision of the steam separator 3113 can facilitate control of the water content in the respiratory medium. By providing the air filter 3114, impurities and harmful substances in the air can be filtered. The gas pressure in the air supply module 3110 can be easily obtained by providing the air pressure sensor 3115. By providing the air check valve 3116, air can be prevented from flowing back into the air supply module 3110 from the air intake module 100 and the air exhaust module 200.

Similarly, in one embodiment, the oxygen supply module 3120 further includes an oxygen filter 3123, an oxygen pressure sensor 3124, and an oxygen check valve 3125, the oxygen filter 3123, the oxygen pressure sensor 3124, and the oxygen check valve 3125 being connected in sequence between the oxygen inlet 3121 and the second solenoid valve 3122. The impurities and the harmful substances in the oxygen can be filtered by providing the oxygen filter 3123. The gas pressure in the oxygen supply module can be easily obtained by providing the oxygen pressure sensor 3124. The oxygen reflux can be avoided by providing the oxygen check valve 3125.

With continued reference to fig. 3, in one embodiment, the gas supply module 300 further includes a first flow sensor 350 and a first pressure sensor 360. The first flow sensor 350 and the first pressure sensor 360 are connected between the gas source module 310 and the first gas tank 320, and are located in a loop in which the air supply module 3110 and the oxygen supply module 3120 are connected in parallel. The first flow sensor 350 is used for detecting the flow rate of the air mixed with oxygen, and the first pressure sensor 360 is used for detecting the pressure of the air mixed with oxygen.

In one embodiment, the gas supply module 300 further includes a relief valve 370, the relief valve 370 being connected between the first gas tank 320 and the external environment to conduct when the pressure in the first gas tank 320 is above a threshold value. It will be appreciated that the first gas tank 320 stores high pressure gas to provide gas to the exhalation module 200 when the gas source module 310 is off. And, since the first gas tank 320 is disposed between the gas source module 310 and the gas suction module 100, the gas source module 310 can supplement the gas in the first gas tank 320 when the gas source module 310 is turned on. The pressure relief valve 370 is provided to be able to be turned on when the pressure in the first air tank 320 is higher than a threshold value, so as to relieve pressure to the external environment, thereby facilitating control of the air pressure in the first air tank 320 within a desired range.

Referring to fig. 4, in one embodiment, the inhalation module 100 includes a first inhalation module 110, the first inhalation module 110 includes a proportional valve 111, the proportional valve 111 is used to adjust the flow rate and pressure of the breathing medium provided by the first inhalation module 110 to the user, and the proportional valve 111 is turned on and off at a preset frequency in synchronization with the gas supply module 300. That is, the proportional valve 111 and the gas supply module 300 have the same on-state and off-state at any time. The flow of the breathing medium can be regulated by the proportional valve 111 so that the breathing medium can be adapted to the breathing of the user.

In one embodiment, the first inspiration module 110 further comprises a second flow sensor 112 coupled to the proportional valve 111, such that the flow of the breathing medium within the inspiration module 100 is readily known by the second flow sensor 112, and such that the flow of the gas within the inspiration module 100 is readily feedback regulated.

With continued reference to fig. 4, in one embodiment, the first inhalation module 110 includes a humidifier 117, where the humidifier 117 is connected to the proportional valve 111, and the humidifier 117 is configured to humidify the breathing medium delivered by the first inhalation module 110, so as to reduce the probability of generating sputum scab during use of the ventilator 10 by a user, and reduce the risk of using the ventilator 10. The humidifier 117 may in particular be connected between the proportional valve 111 and the connection 400.

In one embodiment, the first inhalation module 110 further comprises a water accumulation cup 118 for collecting surplus water from the nebulized or humidified gas which has evolved due to condensation effects during its entry into the connection 400 of the ventilator 10.

In one embodiment, the first inspiration module 110 further comprises an emergency inspiration valve 113, an oxygen concentration sensor 114, and a safety valve 115. The emergency suction valve 113 is capable of being opened and communicating with the external environment when the main body fails to supply gas, and a user can suck air from the external environment through the emergency suction valve 113. The oxygen concentration sensor 114 is used to measure the oxygen concentration of the gas delivered to the user so as to adjust the flow rate of oxygen supplied from the oxygen supply module 3120 according to the demand. The relief valve 115 can be opened to allow pressure relief when the pressure within the inhalation module 100 exceeds a threshold.

In one embodiment, the inhalation module 100 further comprises an inhalation check valve 116, the inhalation check valve 116 allowing gas within the inhalation module 100 to flow to the connection structure 400 and blocking gas from the connection structure 400 from flowing within the inhalation module 100, facilitating gas flow from the exhalation module 200. The humidifier 117 and the water accumulation cup 118 are provided between the intake check valve 116 and the connection structure 400, and the emergency intake valve 113, the oxygen concentration sensor 114, and the safety valve 115 are provided between the proportional valve 111 and the intake check valve 116.

With continued reference to fig. 4, in one embodiment, the air intake module 100 includes a second air intake module 120 disposed in parallel with the first air intake module 110, and the cutoff of the second air intake module 120 does not result in the air intake of the first air intake module 110 being affected because the first air intake module 110 is disposed in parallel with the second air intake module 120.

The second inhalation module 120 comprises an atomization electromagnetic valve 121 and an atomizer 122, the atomization electromagnetic valve 121 is connected between the gas supply module 300 and the atomizer 122 to enable the second inhalation module 120 to be conducted or cut off, and the atomizer 122 is used for adding aerosol into respiratory media transmitted by the second inhalation module 120. It will be appreciated that in the treatment of a patient, the aerosol may be conveniently added to the respiratory medium by providing the nebuliser 122 by nebulising the drug substance as an aerosol for absorption by the patient. Of course, the nebulizing solenoid valve 121 may be controlled to shut off when aerosol medication is not required to be added to the respiratory medium.

Referring to fig. 5, in one embodiment, the exhalation module 200 includes a third solenoid valve 220, the third solenoid valve 220 is connected between the gas supply module 300 and the negative pressure generator 210, and the on-state and off-state of the third solenoid valve 220 are opposite and synchronous to the on-state and off-state of the proportional valve 111. That is, the third solenoid valve 220 is shut off and turned on at a preset frequency in synchronization with the proportional valve 111. For example, when inhaling, the gas source module 310 and the proportional valve 111 are turned on, and the third solenoid valve 220 is turned off, so that the gas provided by the gas supply module 300 flows to the inhaling module 100; when exhaling, the air source module 310 and the proportional valve 111 are cut off, and the third electromagnetic valve 220 is turned on, so that the air provided by the air supply module 300 flows to the exhaling module 200 to form negative pressure at the end of the user, thereby improving the exhaling speed of the user and improving the matching degree of the breathing and high-frequency ventilation of the user.

Referring to fig. 5, in one embodiment, the exhalation module 200 further includes a pressure regulating valve 230, and the pressure regulating valve 230 is connected between the gas supply module 300 and the third electromagnetic valve 220 to regulate the pressure of the gas supplied from the gas supply module 300 to the negative pressure generator 210. It can be appreciated that, since the negative pressure generator 210 obtains the negative pressure through the gas provided by the gas supply module 300, the negative pressure obtained by the negative pressure generator 210 can be adjusted by adjusting the pressure of the cover gas, so as to adjust the auxiliary degree of the auxiliary expiration of the expiration module 200 according to the actual situation.

With continued reference to fig. 5, in one embodiment, the exhalation module 200 further includes a second pressure sensor 240, where the second pressure sensor 240 is connected between the negative pressure generator 210 and the connection structure 400, and is configured to measure the pressure of the gas at the exhalation end of the connection structure 400, so as to provide a reference for adjusting the auxiliary effect of the negative pressure generator 210.

Referring to fig. 5, in one embodiment, the exhalation module 200 further includes an exhalation valve that is connected between the negative pressure generator 210 and the external environment, and the on-state and off-state of the exhalation valve are opposite to those of the proportional valve 111. I.e., the exhalation valve is turned on and off at a preset frequency in synchronization with the third solenoid valve 220. The exhalation valve cooperates with the third solenoid valve 220 to control the flow and cut-off of the air path during exhalation.

In one embodiment, the exhalation module 200 includes a voice coil motor 250, and the high frequency conduction and cutoff of the exhalation valve is controlled by the voice coil motor 250.

In one embodiment, the exhalation module 200 further includes a drain valve 260, where the drain valve 260 is disposed between the voice coil motor 250 and the external environment, and the drain valve 260 is used to drain the condensed water and other liquids in the circuit where the exhalation module 200 is located out of the circuit.

In one embodiment, exhalation module 200 further includes a third flow sensor 270, third flow sensor 270 being disposed between trap 260 and voice coil motor 250 for measuring the pressure of the exhaled breath.

For ease of understanding, the breathing process of the ventilator 10 is briefly described below.

During the intake, both the first solenoid valve 3112 and the second solenoid valve 3122 are turned on, and the third solenoid valve 220 is turned off. The gas supply module 300 supplies gas to the first inhalation module 110 to generate positive pressure at the connection structure 400 for inhalation by a user. When a user needs to take an aerosol medicament, the nebulizing solenoid valve 121 may be opened to add the aerosol medicament to the respiratory medium through the second inhalation module 120.

During exhalation, both the first solenoid valve 3112 and the second solenoid valve 3122 are shut off, and the third solenoid valve 220 is turned on. The first gas tank 320 provides gas to the exhalation module 200 that is capable of generating negative pressure when flowing through the negative pressure generator 210 to assist the user in exhaling.

The ventilator 10 repeats the above steps as a cycle at a predetermined frequency to achieve high-frequency ventilation.

In some embodiments, the first gas tank 320 and the second gas tank 340 may not be provided. At this time, the gas source module 310 may continuously supply gas, and the flow direction of the gas supplied from the gas source module 310 is controlled by controlling the opened and closed states of the proportional valve 111 and the third solenoid valve 220. For example, during inhalation, the proportional valve 111 is opened and the third solenoid valve 220 is closed, so that the gas provided by the gas source module 310 flows into the inhalation module 100 to allow the user to inhale; during exhalation, the proportional valve 111 is closed and the third electromagnetic valve 220 is opened, so that the gas provided by the gas source module 310 flows into the exhalation module 200 to obtain negative pressure at the user end through the negative pressure generator 210, and the user is assisted to exhale through the negative pressure.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A ventilator, the ventilator comprising:

an inhalation module for delivering a respiratory medium;

an exhalation module including a negative pressure generator capable of forming a negative pressure to assist exhalation;

and the gas supply module is connected with the inspiration module to provide breathing medium for the inspiration module.

2. The ventilator of claim 1, wherein the negative pressure generator is capable of creating a negative pressure as gas flows therethrough, the gas supply module connects the inhalation module and the exhalation module in parallel, the gas supply module providing gas to the inhalation module and the exhalation module, respectively, to create a breathing cycle.

3. The ventilator of claim 2, wherein the gas supply module forms the predetermined frequency of the breathing cycle to be higher than a normal physiological breathing frequency.

4. A ventilator according to claim 3, wherein the gas supply module comprises a gas source module, a first gas tank, a pressure relief valve and a second gas tank connected in series in that order; the gas source module is used for providing gas for the first gas tank and the second gas tank; the first gas tank and the second gas tank are both used for storing gas; the pressure reducing valve is used for reducing the pressure of the gas flowing to the second gas tank; the expiration module is connected with the first air tank, and the inspiration module is connected with the second air tank.

5. The ventilator of claim 4, wherein the ventilator is configured to provide the ventilation system,

the air supply module comprises an air supply module, the air supply module comprises a high-pressure air source and a first electromagnetic valve which are sequentially connected, the first electromagnetic valve is connected with the first air tank, the first electromagnetic valve conducts and cuts off the air supply module at the preset frequency, and the first air tank provides air for the expiration module when the first electromagnetic valve cuts off;

the air source module further comprises an oxygen supply module, the oxygen supply module comprises a high-pressure oxygen source second electromagnetic valve which is sequentially connected, the second electromagnetic valve is connected with the second air tank, the second electromagnetic valve is synchronously conducted with the first electromagnetic valve at the preset frequency and cuts off the oxygen supply module, and the first air tank supplies air to the expiration module when the second electromagnetic valve cuts off.

6. A ventilator according to claim 3, wherein the inhalation module comprises a first inhalation module comprising a proportional valve for regulating the flow and pressure of the breathing medium provided by the first inhalation module to the user, the proportional valve being turned on and off at the preset frequency in synchronization with the gas supply module.

7. The ventilator of claim 6, wherein the first inhalation module further comprises a humidifier coupled to the proportional valve, the humidifier configured to humidify the breathing medium delivered by the first inhalation module.

8. The ventilator of claim 6, wherein the inhalation module comprises a second inhalation module disposed in parallel with the first inhalation module, the second inhalation module comprising an aerosolization solenoid valve and an atomizer, the aerosolization solenoid valve being connected between the gas supply module and the atomizer to turn on or off the second inhalation module, the atomizer being configured to add aerosol to the respiratory medium delivered by the second inhalation module.

9. The ventilator of claim 6, wherein the exhalation module comprises a third solenoid valve connected between the gas supply module and the negative pressure generator, the third solenoid valve having a conducting state and a blocking state that are opposite and synchronized to the conducting state and the blocking state of the proportional valve.

10. The ventilator of claim 6, wherein the exhalation module further comprises an exhalation valve connected between the negative pressure generator and the external environment, the exhalation valve being on and off at the preset frequency, the on and off states of the exhalation valve being opposite to the on and off states of the proportional valve.