Breathing machine

Abstract

The utility model relates to a breathing machine. The breathing machine comprises a main machine, a mixer, an oxygen supply channel, an air supply channel and an emergency inspiration channel. Wherein the main machine is provided with an air suction port and an emergency air suction valve; the mixer is arranged in the main machine, and the mixer is communicated with the air suction port; the oxygen supply passage is arranged in the main machine, and an outlet of the oxygen supply passage is communicated with the mixer; the air supply passage is arranged in the main machine, and an outlet of the air supply passage is communicated with the mixer; the emergency air suction channel is arranged in the main machine, an inlet of the emergency air suction channel can be communicated with the external environment, and an outlet of the emergency air suction channel is communicated with the emergency air suction valve. If the breathing machine breaks down, the oxygen supply channel and the air supply channel can not supply air normally, at the moment, the patient can directly breathe outside air through the emergency inspiration channel, the breathing requirement of the patient is met in time, and the life safety of the patient is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a ventilator. Background Art

[0002] In modern clinical medicine, as an effective means of artificially replacing the spontaneous ventilation function, ventilators have been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation, and they occupy a very important position in the field of modern medicine. Ventilators are a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong the lives of patients. The pathway design of traditional ventilators is mostly a combination of one oxygen supply pathway and one gas supply pathway.

[0003] However, traditional ventilators cannot work properly when a malfunction or power outage occurs, and cannot provide oxygen and air to meet the patient's breathing needs, which is not conducive to the patient's treatment and may even threaten the patient's life safety in severe cases.

[0004] BACKGROUND OF THE PRESENT APPLICATION The above information disclosed is only for understanding the background of the concept of the present application and may contain information that does not constitute the prior art. Utility Model Content

[0005] Based on this, in order to solve the above problems, it is necessary to provide a ventilator.

[0006] A ventilator, characterized in that it comprises:

[0007] A main machine, wherein the main machine is provided with an air inlet and an emergency air inlet valve;

[0008] A mixer is disposed in the main unit, and the mixer is communicated with the air inlet;

[0009] An oxygen supply passage is provided in the main unit, and an outlet of the oxygen supply passage is communicated with the mixer;

[0010] an air supply passage, disposed in the main unit, wherein an outlet of the air supply passage is communicated with the mixer; and

[0011] The emergency air inhalation passage is arranged in the main unit, the inlet of the emergency air inhalation passage can be communicated with the external environment, and the outlet of the emergency air inhalation passage is communicated with the emergency air inhalation valve.

[0012] The above-mentioned ventilator has at least the following beneficial effects: the inlet of the oxygen supply passage can be connected to the oxygen source, the inlet of the gas supply passage can be connected to the air source, the oxygen supply passage can input oxygen into the mixer, the gas supply passage can input air into the mixer, oxygen and air are fully mixed in the mixer to form a gas with a suitable oxygen concentration, and then delivered to the patient interface for the patient to inhale. If the ventilator fails or loses power, its oxygen supply passage and gas supply passage may not be able to supply gas normally. At this time, the patient can directly breathe the outside air through the emergency inhalation passage to meet the patient's breathing needs in time and ensure the patient's life safety.

[0013] In one embodiment, a one-way valve is provided on the emergency inhalation passage. When the ventilator is working normally, that is, when the ventilator is not malfunctioning, the one-way valve allows the gas to flow from the entrance of the emergency inhalation passage to the exit of the emergency inhalation passage, forming a simple closed process to prevent the gas from leaking from the entrance of the emergency inhalation passage to the external environment. When the ventilator fails, the patient can inhale from the emergency inhalation passage through the emergency inhalation valve, and at this time the one-way valve allows air from the external environment to pass through, so as to meet the patient's inhalation needs in time.

[0014] In one embodiment, the emergency inhalation passage is further provided with a first electromagnetic switch valve, which is provided between the one-way valve and the outlet of the emergency inhalation passage, and is used to control the opening and closing of the emergency inhalation passage. The first electromagnetic switch valve is added here for control, mainly to prevent the emergency inhalation valve from opening when the ventilator is in a negative pressure state and affecting the ventilator parameters.

[0015] In one of the embodiments, a filter is further provided on the emergency air inhalation passage. The filter is located between the one-way valve and the inlet of the emergency air inhalation passage, and the filter is used to filter air.

[0016] In one embodiment, a mechanical safety valve is further provided on the emergency inhalation passage, and the mechanical safety valve is located between the one-way valve and the outlet of the emergency inhalation passage, and the mechanical safety valve is used for pressure relief. When the pressure at the inhalation end monitored by the pressure sensor exceeds a certain value, such as when the pressure exceeds 100 cmH2O, the mechanical safety valve will relieve pressure to avoid harm to the patient.

[0017] In one embodiment, the ventilator further includes a first sensor, which is disposed between the outlet of the emergency inhalation passage and the emergency inhalation valve, and is used to measure oxygen concentration.

[0018] In one embodiment, the ventilator further includes a second sensor, which is disposed between the outlet of the emergency inhalation passage and the emergency inhalation valve, and is used to measure air pressure.

[0019] In one embodiment, the ventilator further includes a first electromagnetic switch valve, a second electromagnetic switch valve and a three-way valve, the two air inlet ends of the three-way valve are respectively connected to the oxygen supply passage and the air supply passage, and the air outlet end of the three-way valve is connected to the atomizer through the second electromagnetic switch valve. When the second electromagnetic switch valve is opened, the gas introduced by the three-way valve can be delivered to the atomizer, and then delivered to the outside through the atomizer for use in a breathing mask, etc.

[0020] In one embodiment, the inlet of the air supply passage is connected to the high-pressure air source, and the air supply passage is provided with an air pressure sensor, an air pressure relief valve, a first air filter, an air one-way valve, an air pressure reducing valve, an air proportional valve, a second air filter, an air flow sensor, and an air pressure difference sensor connected to both sides of the air flow sensor in sequence from the inlet to the outlet; for example, after the high-pressure air enters the air supply passage, the air pressure sensor can monitor the air pressure in real time, and if the air pressure exceeds 0.68MPa, the air pressure relief valve will release the pressure. Then the gas passes through the first air filter, the air one-way valve, the air pressure reducing valve, and the air proportional valve in sequence. The air one-way valve can prevent the gas from flowing back, and the air pressure reducing valve can reduce the pressure of the air (such as reducing the pressure to 0.23-0.28MPa). The first air filter can filter the air passing through to prevent the impurities in the subsequent air from entering the air proportional valve together with the air and damaging the air proportional valve. The outlet of the air proportional valve is often small, and the air flow rate coming out of the air proportional valve is turbulent. If the air flow is not stabilized, the rapid gas may cause unstable flow when passing through the flow sensor. The air coming out of the air proportional valve enters the second air filter, which not only filters the air twice, but also stabilizes the air flow. The air then enters the air flow sensor, which is used to monitor the flow of gas coming out of the air proportional valve, so that the air proportional valve can accurately provide the required air to achieve the required air-oxygen mixing ratio and the required tidal volume.

[0021] In one embodiment, the inlet of the oxygen supply passage is connected to a high-pressure oxygen source, and the oxygen supply passage is provided with an oxygen pressure sensor, an oxygen pressure relief valve, a first oxygen filter, an oxygen one-way valve, an oxygen pressure reducing valve, an oxygen proportional valve, a second oxygen filter, an oxygen flow sensor, and an oxygen pressure difference sensor connected to both sides of the oxygen flow sensor in sequence from the inlet to the outlet. For example, after the high-pressure oxygen enters the oxygen supply passage, the oxygen pressure sensor can monitor the air pressure in real time. If the air pressure exceeds 0.68MPa, the oxygen pressure relief valve will release the pressure. Then the gas passes through the first oxygen filter, the oxygen one-way valve, the oxygen pressure reducing valve, and the oxygen proportional valve in sequence. The oxygen one-way valve can prevent gas reflux, the oxygen pressure reducing valve can reduce the pressure of oxygen (such as reducing the pressure to 0.23-0.28MPa), and the first oxygen filter can filter the oxygen passing through to prevent impurities in the subsequent oxygen from entering the oxygen proportional valve together with the oxygen and damaging the oxygen proportional valve. The outlet of the oxygen proportional valve is often small, and the oxygen flow rate coming out of the oxygen proportional valve is turbulent. If the airflow is not stabilized, the rapid gas may cause unstable flow when passing through the flow sensor. The oxygen coming out of the oxygen proportional valve enters the second oxygen filter, which not only filters the oxygen twice, but also stabilizes the airflow. The oxygen then enters the oxygen flow sensor, which is used to monitor the flow of gas coming out of the oxygen proportional valve, so that the oxygen proportional valve can accurately provide the required oxygen, achieve the required air-oxygen mixing ratio and the required tidal volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a ventilator provided in one embodiment of the present application.

[0024] Figure 2 An exploded schematic diagram of a ventilator provided in accordance with an embodiment of the present application.

[0025] Figure 3 Another structural schematic diagram of a ventilator provided for an embodiment of the present application.

[0026] Figure 4 A schematic diagram of a ventilator pathway provided for one embodiment of the present application.

[0027] Reference numerals:

[0028] 100, ventilator; 101, host; 102, inhalation port; 103, emergency inhalation valve; G1, air supply passage; 2, air pressure sensor; 3, air pressure relief valve; 4, first air filter; 5, air one-way valve; 6, air pressure reducing valve; 7, air proportional valve; 8, second air filter; 9, air flow sensor; 10, air differential pressure sensor; G2, oxygen supply passage; 2', oxygen pressure sensor; 3', oxygen pressure relief valve; 4', first oxygen filter; 5', oxygen one-way valve; 6', oxygen pressure reducing valve; 7', oxygen proportional valve; 8', second oxygen filter; 9', oxygen flow sensor; 10', oxygen differential pressure sensor; 12, mixer; G3, emergency inhalation passage; 13, oxygen concentration sensor; 14, mechanical safety valve; 15, first electromagnetic switch valve; 17, one-way valve; 18, filter; 23, pressure sensor; 24, second electromagnetic switch valve; 27, three-way valve. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the present application provides a ventilator 100, which includes a host 101, a mixer 12, an oxygen supply passage G2, an air supply passage G1 and an emergency inhalation passage G3. Among them, the host 101 is provided with an air intake port 102 and an emergency air intake valve 103; the mixer 12 is arranged in the host 101, and the mixer 12 is communicated with the air intake port 102; the oxygen supply passage G2 is arranged in the host 101, the air inlet of the oxygen supply passage G2 is exposed to the host 101, and the outlet of the oxygen supply passage G2 is communicated with the mixer 12; the air supply passage G1 is arranged in the host 101, the air inlet of the air supply passage G1 is exposed to the host 101, and the outlet of the air supply passage G1 is communicated with the mixer 12; the emergency air intake passage G3 is arranged in the host 101, the inlet of the emergency air intake passage G3 can be communicated with the external environment, and the outlet of the emergency air intake passage G3 is communicated with the emergency air intake valve 103.

[0031] The above-mentioned ventilator 100 includes at least the following beneficial effects: the inlet of the oxygen supply passage G2 can be connected to the oxygen source, the inlet of the gas supply passage G1 can be connected to the air source, the oxygen supply passage G2 can input oxygen into the mixer 12, the gas supply passage G1 can input air into the mixer 12, and the oxygen and air are fully mixed in the mixer 12 to form a gas with a suitable oxygen concentration, which is delivered to the patient interface for the patient to inhale. If the ventilator 100 fails or loses power, its oxygen supply passage G2 and gas supply passage G1 may not be able to supply air normally. At this time, the patient can directly breathe the outside air through the emergency inhalation passage G3 to meet the patient's breathing needs in time and ensure the patient's life safety.

[0032] Specifically, in some embodiments, a one-way valve 17 is provided on the emergency inhalation passage G3. When the ventilator 100 is operating normally, that is, the ventilator 100 is not faulty, the one-way valve 17 allows the gas to flow from the entrance of the emergency inhalation passage G3 to the exit of the emergency inhalation passage G3, forming a simple closed process to prevent the gas from leaking from the entrance of the emergency inhalation passage G3 to the external environment. When the ventilator 100 fails, the patient can inhale from the emergency inhalation passage G3 through the emergency inhalation valve 103, and at this time, the one-way valve 17 allows the air from the external environment to pass through, so as to meet the patient's inhalation needs in time.

[0033] Specifically, in some embodiments, the emergency inhalation passage G3 is further provided with a first electromagnetic switch valve 15, which is provided between the one-way valve 17 and the outlet of the emergency inhalation passage G3, and is used to control the opening and closing of the emergency inhalation passage G3. The first electromagnetic switch valve 15 is added here for control, mainly to prevent the emergency inhalation valve 103 from opening when the ventilator 100 is in a negative pressure state and affecting the parameters of the ventilator 100.

[0034] Specifically, in some embodiments, a filter 18 is further provided on the emergency air inhalation passage G3. The filter 18 is located between the one-way valve 17 and the inlet of the emergency air inhalation passage G3. The filter 18 is used to filter air.

[0035] Specifically, in some embodiments, a mechanical safety valve 14 is further provided on the emergency inhalation passage G3, and the mechanical safety valve 14 is located between the one-way valve 17 and the outlet of the emergency inhalation passage G3, and the mechanical safety valve 14 is used for pressure relief. When the inhalation end pressure monitored by the pressure sensor 23 exceeds a certain value, such as when the pressure exceeds 100 cmH2O, the mechanical safety valve 14 will relieve the pressure to avoid harm to the patient.

[0036] Specifically, in some embodiments, the ventilator 100 further includes a first sensor, which is disposed between the outlet of the emergency inhalation passage G3 and the emergency inhalation valve 103, and the first sensor is used to measure oxygen concentration.

[0037] Specifically, in some embodiments, the ventilator 100 further includes a second sensor, which is disposed between the outlet of the emergency inhalation passage G3 and the emergency inhalation valve 103, and the second sensor is used to measure air pressure.

[0038] Furthermore, in some embodiments, the ventilator 100 further includes a first electromagnetic switch valve 15, a second electromagnetic switch valve 24 and a three-way valve 27, the two air inlet ends of the three-way valve 27 are respectively connected to the oxygen supply passage G2 and the air supply passage G1, and the air outlet end of the three-way valve 27 is connected to the nebulizer through the second electromagnetic switch valve 24. When the second electromagnetic switch valve 24 is opened, the gas introduced by the three-way valve 27 can be delivered to the nebulizer, and then delivered to the outside through the nebulizer for use in a breathing mask, etc.

[0039] Furthermore, in some embodiments, the inlet of the air supply passage G1 is connected to the high-pressure air source, and the air supply passage G1 is provided with an air pressure sensor 223, an air pressure relief valve 3, a first air filter 418, an air check valve 5, an air pressure reducing valve 6, an air proportional valve 7, a second air filter 818, an air flow sensor 9, and an air pressure difference sensor 10 connected to both sides of the air flow sensor 9 in sequence from the inlet to the outlet; for example, after the high-pressure air enters the air supply passage G1, the air pressure sensor 223 can monitor the air pressure in real time, and if the air pressure exceeds 0.68MPa, the air pressure relief valve 3 will release the pressure. Then the gas passes through the first air filter 418, the air check valve 5, the air pressure reducing valve 6, and the air proportional valve 7 in sequence, the air check valve 5 can prevent the gas from flowing back, the air pressure reducing valve 6 can reduce the pressure of the air (such as reducing the pressure to 0.23-0.28MPa), and the first air filter 418 can filter the air passing through to prevent the impurities in the subsequent air from entering the air proportional valve 7 together with the air and damaging the air proportional valve 7. The outlet of the air proportional valve 7 is often small, and the air flow rate from the air proportional valve 7 is turbulent. If the airflow is not stabilized, the rapid flow of gas may cause unstable flow when passing through the flow sensor. The air from the air proportional valve 7 enters the second air filter 818, which can not only perform secondary filtration on the air, but also stabilize the airflow. After that, the air enters the air flow sensor 9, the purpose of which is to monitor the flow of the gas from the air proportional valve 7, so that the air proportional valve 7 can accurately provide the required air to achieve the required air-oxygen mixing ratio and the required tidal volume.

[0040] Furthermore, in some embodiments, the inlet of the oxygen supply passage G2 is connected to a high-pressure oxygen source, and the oxygen supply passage G2 is provided with an oxygen pressure sensor 2'23, an oxygen pressure relief valve 3', a first oxygen filter 4'18, an oxygen one-way valve 5', an oxygen pressure reducing valve 6', an oxygen proportional valve 7', a second oxygen filter 8'18, an oxygen flow sensor 9', and an oxygen pressure difference sensor 10' connected to both sides of the oxygen flow sensor 9' in sequence from its inlet to its outlet. For example, after high-pressure oxygen enters the oxygen supply passage G2, the oxygen pressure sensor 2'23 can monitor the air pressure in real time, and if the air pressure exceeds 0.68MPa, the oxygen pressure relief valve 3' will release the pressure. Then the gas passes through the first oxygen filter 4'18, the oxygen one-way valve 5', the oxygen pressure reducing valve 6' and the oxygen proportional valve 7' in sequence. The oxygen one-way valve 5' can prevent gas backflow, and the oxygen pressure reducing valve 6' can reduce the pressure of oxygen (such as reducing the pressure to 0.23-0.28MPa). The first oxygen filter 4'18 can filter the oxygen passing through to prevent the impurities in the subsequent oxygen from entering the oxygen proportional valve 7' together with the oxygen and damaging the oxygen proportional valve 7'. The outlet of the oxygen proportional valve 7' is often small, and the oxygen flow rate from the oxygen proportional valve 7' is turbulent. If the airflow is not stabilized, the rapid flow of gas passing through the flow sensor may cause unstable flow. The oxygen coming out of the oxygen proportional valve 7' then enters the second oxygen filter 8'18, which can not only perform secondary filtration on the oxygen, but also stabilize the airflow of oxygen. After that, the oxygen enters the oxygen flow sensor 9', the purpose of which is to monitor the flow of the gas coming out of the oxygen proportional valve 7', so that the oxygen proportional valve 7' can accurately give the required oxygen to achieve the required air-oxygen mixing ratio and the required tidal volume.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

[0043] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0048] In the description of this specification, the description of reference terms "one embodiment", "other implementation methods", etc. means that the specific features, structures, materials or features described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

Claims

1. A ventilator, characterized in that: include: A main machine, wherein the main machine is provided with an air inlet and an emergency air inlet valve; A mixer is disposed in the main unit, and the mixer is communicated with the air inlet; An oxygen supply passage is provided in the main unit, and an outlet of the oxygen supply passage is communicated with the mixer; an air supply passage, disposed in the main unit, wherein an outlet of the air supply passage is communicated with the mixer; and The emergency air inhalation passage is arranged in the main unit, the inlet of the emergency air inhalation passage can be communicated with the external environment, and the outlet of the emergency air inhalation passage is communicated with the emergency air inhalation valve.

2. The ventilator according to claim 1, characterized in that: A one-way valve is provided on the emergency air inhalation passage.

3. The ventilator according to claim 2, characterized in that: The emergency air intake passage is also provided with a first electromagnetic switch valve, which is arranged between the one-way valve and the outlet of the emergency air intake passage, and is used to control the opening and closing of the emergency air intake passage.

4. The ventilator according to claim 2, characterized in that: The emergency air inhalation passage is also provided with a filter, the filter is located between the one-way valve and the inlet of the emergency air inhalation passage, and the filter is used for filtering air.

5. The ventilator according to claim 2, characterized in that: The emergency air inhalation passage is also provided with a mechanical safety valve, which is located between the one-way valve and the outlet of the emergency air inhalation passage, and is used for pressure relief.

6. The ventilator according to claim 1, characterized in that: The ventilator further includes a first sensor, which is disposed between the outlet of the emergency inhalation passage and the emergency inhalation valve, and is used to measure oxygen concentration.

7. The ventilator according to claim 1, characterized in that: The ventilator further comprises a second sensor, which is arranged between the outlet of the emergency inhalation passage and the emergency inhalation valve, and is used to measure air pressure.

8. The ventilator according to claim 1, characterized in that: The ventilator also includes a first electromagnetic switch valve, a second electromagnetic switch valve and a three-way valve. The two air inlet ends of the three-way valve are respectively connected to the oxygen supply passage and the air supply passage, and the air outlet end of the three-way valve is connected to the nebulizer through the second electromagnetic switch valve.

9. A ventilator according to any one of claims 1 to 8, characterized in that: The inlet of the air supply passage is connected to a high-pressure air source, and the air supply passage is provided with an air pressure sensor, an air pressure relief valve, a first air filter, an air check valve, an air pressure reducing valve, an air proportional valve, a second air filter, an air flow sensor, and an air pressure difference sensor connected to both sides of the air flow sensor in sequence from the inlet to the outlet.

10. A ventilator according to any one of claims 1 to 8, characterized in that: The inlet of the oxygen supply passage is connected to a high-pressure oxygen source, and the oxygen supply passage is provided with an oxygen pressure sensor, an oxygen pressure relief valve, a first oxygen filter, an oxygen one-way valve, an oxygen pressure reducing valve, an oxygen proportional valve, a second oxygen filter, an oxygen flow sensor, and an oxygen pressure difference sensor connected to both sides of the oxygen flow sensor in sequence from the inlet to the outlet.

Images