Pneumatic visual and acoustic alarm device for breathing machine

Abstract

The invention relates to the technical field of medical instruments, and provides a pneumatic visual and acoustic alarm device for a breathing machine, which comprises an air inlet module, an air storage tank, a switch valve and an alarm module, the air inlet module, the air storage tank and the alarm module are sequentially connected and communicated; the alarm module comprises a pneumatic control valve, a sound sense alarm, an OR gate, a four-way switch, an alarm lamp and a two-position five-way valve; the upper cavity of the pneumatic control valve is communicated with the gas storage tank, the four-way switch is communicated with the alarm lamp and the lower cavity of the pneumatic control valve, the OR gate is respectively communicated with the lower cavity of the two-position five-way valve, the sound sense alarm and the lower cavity of the pneumatic control valve, the alarm lamp is communicated with the upper cavity of the two-position five-way valve, and the alarm lamp comprises a first valve core and a second valve core. The second valve element is slidably arranged on the outer side wall of the first valve element in a sleeving mode, the switching valve communicates with the air inlet module and the upper cavity of the two-position five-way valve, timely alarming of the working state of the breathing machine is achieved, and the safety of the breathing machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a pneumatic visual and acoustic alarm device for a ventilator. Background Art

[0002] Most of the ventilators on the market are pneumatic and electrically controlled. They all use solenoid valves to realize the ventilator's cyclic operation. They use power as the power source and use solenoid valves to realize the conversion from continuous gas to rhythmic gas. They are limited when working in the field. Micro, pneumatic and air-controlled ventilators are used for various on-site rescue of critically ill patients (such as mines, exploration, construction sites, transportation, border defense, field operations, etc.) and rescue and care of injured and sick people on the way to the hospital in ambulances, ships, and airplanes. They can be used for emergency patients to undergo magnetic resonance imaging (MRI) examinations to detect lesions earlier. However, the alarm system of micro, pneumatic and air-controlled ventilators on the market currently only has sound alarms. During MRI examinations and noisy environments, the sound alarm cannot serve to remind medical staff. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a pneumatic visual and acoustic alarm device for a ventilator, which can realize timely alarm of the working status of the ventilator and improve the safety of the ventilator.

[0004] The present invention provides a pneumatic visual and acoustic alarm device for a ventilator, comprising: an air intake module, an air storage tank, a switch valve and an alarm module; The air intake module, the air storage tank and the alarm module are connected and communicated in sequence; The alarm module includes an air-controlled valve, an acoustic alarm, an OR door, a four-way switch, an alarm light and a two-position five-way valve; The upper cavity of the air-controlled valve is connected to the air storage tank, the four-way switch is connected to the alarm light and the lower cavity of the air-controlled valve, the OR gate is respectively connected to the lower cavity of the two-position five-way valve, the acoustic alarm and the lower cavity of the air-controlled valve, the alarm light is connected to the upper cavity of the two-position five-way valve, the alarm light includes a first valve core and a second valve core, the second valve core is slidably mounted on the outer side wall of the first valve core, the first trigger is connected to the pressure sampling connector and the upper cavity of the two-position five-way valve, the switch valve is connected to the air intake module and the upper cavity of the two-position five-way valve, so as to push the second valve core to overlap with the first valve core.

[0005] According to a pneumatic visual and audible alarm device for a ventilator provided by the present invention, the alarm light also includes an alarm housing, an alarm window, a compression spring and a base, the base is connected to the four-way switch and the upper cavity of the two-position five-way valve, the alarm housing is fixedly connected to the base and the alarm window, the first valve core is fixedly arranged inside the alarm window, and the compression spring is arranged between the alarm housing and the second valve core to push the second valve core to slide with the first valve core.

[0006] A pneumatic visual and audible alarm device for a ventilator provided according to the present invention also includes a first trigger and a pressure sampling connector, wherein the first trigger connects the pressure sampling connector and the upper cavity of the two-position five-way valve.

[0007] A pneumatic visual and acoustic alarm device for a ventilator provided according to the present invention also includes a pressure reducing valve module and an air intake module, wherein the air intake module, the pressure reducing valve module and the air intake module are connected and communicated in sequence.

[0008] According to a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention, the inhalation module includes an air-oxygen mixing valve, an air whistle, a safety valve, a quick exhaust valve, a high airway pressure alarm valve and an inhalation port. The air-oxygen mixing valve, the safety valve, the quick exhaust valve, the high airway pressure alarm valve and the inhalation port are connected and communicated in sequence, and the high airway pressure alarm valve is communicated with the air whistle so that the air whistle will issue an alarm when the pressure in the airway is too high.

[0009] A pneumatic visual and acoustic alarm device for a ventilator provided according to the present invention further includes a flow valve module, and the flow valve module is arranged between the pressure reducing valve module and the inhalation module.

[0010] According to the present invention, a pneumatic visual and audible alarm device for a ventilator also includes a pressure gauge, a second trigger and a frequency valve module. The pressure sampling connector, the pressure gauge, the second trigger and the frequency valve module are connected and communicated in sequence, and the frequency valve module is communicated with the flow valve module.

[0011] According to a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention, the switch valve is connected to the pressure reducing valve module and the frequency valve module.

[0012] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator further comprises a manual valve, wherein the manual valve is arranged between the pressure reducing valve module and the inhalation module.

[0013] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: According to an embodiment of the present invention, a pneumatic visual and audible alarm device for a ventilator is provided. By setting the switch valve to connect the air intake module and the upper cavity of the two-position five-way valve, an air source is provided in the alarm light to push the second valve core to move up and down along the first valve core. This solves the problem that pneumatic air-controlled ventilators in the prior art only have sound alarms, realizes visual alarms, expands the scope of application of pneumatic air-controlled ventilators, and improves the safety of the equipment.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a schematic diagram of the structure of a pneumatic visual and acoustic alarm device for a ventilator.

[0017] Figure 2 This is one of the structural schematic diagrams of an alarm light of a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention.

[0018] Figure 3 This is the second structural schematic diagram of an alarm light of a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention.

[0019] Reference numerals: 1. Intake module; 2. Gas storage tank; 3. Switch valve; 4. Alarm module; 401. Air control valve; 402. Sound alarm; 403. OR door; 404. Four-way switch; 405. Alarm light; 4051. First valve core; 4052. Second valve core; 4053. Alarm housing; 4054. Alarm window; 4055. Compression spring; 4056. Base; 406. Two-position five-way valve; 407. First throttle valve; 5. First trigger; 6. Pressure sampling connector; 7. Pressure reducing valve module; 8. Intake module; 801. Air-oxygen mixing valve; 802. Air whistle; 803. Safety valve; 804. Quick exhaust valve; 805. Airway high pressure alarm valve; 806. Intake port; 9. Flow valve module; 10. Pressure gauge; 11. Second trigger; 12. Frequency valve module; 13. Manual valve; 14. Second throttle valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0023] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or 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.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0025] Figure 1 The present invention is a schematic diagram of the structure of a pneumatic visual and acoustic alarm device for a ventilator. Figure 2 This is one of the structural schematic diagrams of an alarm light of a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention. Figure 3 This is the second structural schematic diagram of an alarm light of a pneumatic visual and acoustic alarm device for a ventilator provided by the present invention.

[0026] The present invention provides a pneumatic visual and acoustic alarm device for a ventilator, such as Figures 1 to 3 As shown, it includes: an air intake module 1, an air storage tank 2, a switch valve 3 and an alarm module 4; The air intake module 1, the air storage tank 2 and the alarm module 4 are connected and communicated in sequence; The alarm module 4 includes an air-controlled valve 401, an acoustic alarm 402, an OR gate 403, a four-way switch 404, an alarm light 405 and a two-position five-way valve 406; The upper cavity of the air-controlled valve is connected to the air storage tank 2, the four-way switch 404 is connected to the alarm light 405 and the lower cavity of the air-controlled valve, the OR gate 403 is respectively connected to the lower cavity of the two-position five-way valve, the acoustic alarm 402 and the lower cavity of the air-controlled valve, the alarm light 405 is connected to the upper cavity of the two-position five-way valve, the alarm light 405 includes a first valve core 4051 and a second valve core 4052, the second valve core 4052 is slidably mounted on the outer wall of the first valve core 4051, the switch valve 3 is connected to the air intake module 1 and the upper cavity of the two-position five-way valve, so as to push the second valve core 4052 to overlap with the first valve core 4051.

[0027] In this embodiment, the switch valve 3 is provided to connect the air intake module 1 and the upper cavity of the two-position five-way valve, and provide an air source in the alarm light 405, so as to push the second valve core 4052 to move up and down along the first valve core 4051, thereby solving the problem that the pneumatic air-controlled ventilator in the prior art only has a sound alarm, realizing a visual alarm, expanding the application scope of the pneumatic air-controlled ventilator, and improving the safety of the equipment.

[0028] According to some embodiments of the present invention, Figure 2 As shown, the switch valve 3 is open, and the ventilator is in normal working condition, the valve body of the air-controlled valve is in the upper cavity position of the air-controlled valve, and there is no gas output at the output port of the air-controlled valve 401, the four-way switch 404 is closed, and the valve body of the two-position five-way valve is in the upper cavity position of the two-position five-way valve, and there is gas output from the upper cavity of the two-position five-way valve to the alarm light 405, and the gas pushes the second valve core 4052 to move upward, so that the first valve core 4051 and the second valve core 4052 overlap, and only the second valve core 4052 can be seen by observing the alarm light 405, and there is no gas passing through the acoustic alarm 402, and the acoustic alarm 402 does not emit an alarm sound.

[0029] According to some embodiments of the present invention, Figure 3 As shown, when the switch valve 3 is opened and the gas source pressure in the gas storage tank 2 is insufficient, the valve body of the air-controlled valve is in the lower cavity position of the air-controlled valve, and the gas at the output port of the air-controlled valve 401 is divided into two paths, one path enters the four-way switch 404 to open the four-way switch 404, and the other path enters the acoustic alarm 402 through the OR gate 403, causing it to emit an alarm sound. The valve body of the two-position five-way valve is in the upper cavity position of the two-position five-way valve, and the upper cavity of the two-position five-way valve has gas output. Since the four-way switch 404 is opened, the gas output from the upper cavity of the two-position five-way valve is output via the four-way switch 404, and the second valve core 4052 falls due to gravity. By observing the alarm light 405, the first valve core 4051 and the second valve core 4052 can be seen at the same time to realize visual alarm. The acoustic alarm 402 and the alarm light 405 alarm at the same time, realizing visual alarm without power supply, thereby improving the scope of application of the equipment and the safety of the equipment.

[0030] According to some embodiments of the present invention, Figure 3As shown, the switch valve 3 is opened. When the breathing circuit of the ventilator and the patient is detached, the valve body of the air-controlled valve is in the upper cavity position of the air-controlled valve, and there is no gas output from the output port of the air-controlled valve 401. The four-way switch 404 is closed, and the pressure of the air inlet of the two-position five-way valve drops to atmospheric pressure. The valve body of the two-position five-way valve is in the lower cavity position of the two-position five-way valve, and there is gas output from the lower cavity of the two-position five-way valve. The acoustic alarm 402 emits an alarm sound, and no gas is introduced into the alarm light 405. The second valve core 4052 falls due to gravity. By observing the alarm light 405, the first valve core 4051 and the second valve core 4052 can be seen at the same time, thereby realizing a visual alarm.

[0031] According to some preferred embodiments of the present invention, the acoustic alarm 402 includes an alarm whistle.

[0032] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 2 and Figure 3 As shown, the alarm light 405 also includes an alarm housing 4053, an alarm window 4054, a compression spring 4055 and a base 4056. The base 4056 is connected to the four-way switch 404 and the upper cavity of the two-position five-way valve. The alarm housing 4053 is fixedly connected to the base 4056 and the alarm window 4054. The first valve core 4051 is fixedly arranged inside the alarm window 4054. The compression spring 4055 is arranged between the alarm housing 4053 and the second valve core 4052 to push the second valve core 4052 to slide with the first valve core 4051.

[0033] In this embodiment, a compression spring 4055 is disposed between the alarm housing 4053 and the second valve core 4052 to provide a driving force for the second valve core 4052 , thereby improving the accuracy of the alarm light 405 .

[0034] According to some embodiments of the present invention, when gas is introduced into the alarm light 405, the second valve core 4052 moves upward and overlaps with the first valve core 4051, and only the second valve core 4052 can be seen in the alarm window 4054. At this time, the compression spring 4055 is in a compressed state. When the ventilator works abnormally, the compression spring 4055 stretches, the second valve core 4052 and the first valve core 4051 are separated, and the alarm window 4054 displays the first valve core 4051, thereby generating an alarm.

[0035] According to a pneumatic visual and audible alarm device for a ventilator provided by the present invention, the first valve core 4051 and the second valve core 4052 have different colors.

[0036] In this embodiment, by setting the first valve core 4051 and the second valve core 4052 to different colors, it is easy for the staff to find out whether the ventilator is working abnormally.

[0037] According to some preferred embodiments of the present invention, the first valve core 4051 is red.

[0038] According to some preferred embodiments of the present invention, the second valve core 4052 is green.

[0039] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and audible alarm device for a ventilator further includes a first trigger 5 and a pressure sampling connector 6, wherein the first trigger 5 is connected to the pressure sampling connector 6 and the upper cavity of the two-position five-way valve.

[0040] In this embodiment, by setting the first trigger 5 to connect the pressure sampling connector 6 and the upper cavity of the two-position five-way valve, when the airway pressure at the patient end is detected to be abnormal, the acoustic alarm 402 and the alarm light 405 can give an alarm in time.

[0041] According to some embodiments of the present invention, when the switch valve 3 is in the open state and the pressure sampling connector 6 detects that the airway pressure is atmospheric pressure, the first trigger 5 is triggered, the valve body of the two-position five-way valve is in the lower cavity of the two-position five-way valve, and the alarm light 405 and the sound alarm 402 sound an alarm at the same time.

[0042] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and audible alarm device for the ventilator also includes a first throttle valve 407 and a second throttle valve 14, wherein the first throttle valve 407 is connected to the OR gate 403 and the audible alarm 402, and the second throttle valve 14 is connected to the pressure sampling connector 6 and the upper cavity of the two-position five-way valve.

[0043] In this embodiment, the first throttle valve 407 and the second throttle valve 14 are provided to adjust the flow rate and flow velocity of the gas and improve the accuracy of the equipment.

[0044] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and acoustic alarm device for a ventilator further includes a pressure reducing valve module 7 and an air inhalation module 8, wherein the air inlet module 1, the pressure reducing valve module 7 and the air inhalation module 8 are sequentially connected and communicated.

[0045] In this embodiment, by providing a pressure reducing valve module 7, the gas provided by the air intake module 1 is decompressed and stabilized before entering the air intake module 8, thereby improving the comfort and safety of the equipment.

[0046] According to a preferred embodiment of the present invention, the pressure reducing valve module 7 reduces the pressure of the gas to 0.28 MPa~0.29 MPa.

[0047] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the inhalation module 8 includes an air-oxygen mixing valve 801, an air whistle 802, a safety valve 803, a quick exhaust valve 804, an airway pressure high alarm valve 805 and an inhalation port 806. The air-oxygen mixing valve 801, the safety valve 803, the quick exhaust valve 804, the airway pressure high alarm valve 805 and the inhalation port 806 are connected and communicated in sequence, and the airway pressure high alarm valve 805 is communicated with the air whistle 802 so that the air whistle 802 sends out an alarm when the pressure in the airway is too high.

[0048] In this embodiment, the air-oxygen mixing valve 801 is used to produce a Venturi effect to bring in air and oxygen for mixing. The function of the safety valve 803 is that when the ventilator is connected to the patient, if the ventilator airway pressure exceeds a threshold, the safety valve 803 opens to release air to protect the patient's safety. The quick exhaust valve 804 quickly exhausts the gas above the exhalation valve diaphragm when the patient exhales, ensuring that the patient exhales smoothly.

[0049] According to some preferred embodiments of the present invention, the air whistle 802 sounds an alarm when the airway pressure is higher than 6 kPa.

[0050] According to some preferred embodiments of the present invention, when the airway pressure exceeds 9 kPa, the safety valve 803 opens to release air.

[0051] According to some embodiments of the present invention, the gas mixed from the air-oxygen mixing valve 801 passes through the safety valve 803, the high airway pressure alarm valve 805 and the quick exhaust valve 804, and finally comes out from the inhalation port 806 to be supplied to the patient.

[0052] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and acoustic alarm device for a ventilator further includes a flow valve module 9 , which is arranged between the pressure reducing valve module 7 and the inhalation module 8 .

[0053] In this embodiment, a flow valve module 9 is provided to control the ventilation volume in the air intake module 8 .

[0054] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and audible alarm device for the ventilator also includes a pressure gauge 10, a second trigger 11 and a frequency valve module 12. The pressure sampling connector 6, the pressure gauge 10, the second trigger 11 and the frequency valve module 12 are connected and communicated in sequence, and the frequency valve module 12 is communicated with the flow valve module 9.

[0055] In this embodiment, the pressure sampling connector 6 is provided to collect the airway pressure of the patient, and cooperates with the pressure gauge 10 and the second trigger 11 to start the frequency valve module 12, thereby improving the automation level of the equipment.

[0056] According to some embodiments of the present invention, the pressure gauge 10 indicates the patient's airway pressure. When the patient has spontaneous breathing during the exhalation period and the patient's inspiratory pressure is -0.3 kPa, the second trigger 11 will trigger the frequency valve module 12 through the pressure sampling connector 6 to generate an inhalation action.

[0057] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the switch valve 3 is connected to the pressure reducing valve module 7 and the frequency valve module 12 .

[0058] According to the present invention, a pneumatic visual and acoustic alarm device for a ventilator is provided, such as Figure 1 As shown, the pneumatic visual and audible alarm device for a ventilator further includes a manual valve 13 , which is arranged between the pressure reducing valve module 7 and the inhalation module 8 .

[0059] In this embodiment, manual valve 13 is provided to realize manual ventilation of the ventilator, thereby improving the safety of the equipment.

[0060] According to some embodiments of the present invention, in special circumstances, the ventilation of the ventilator is controlled by the manual valve 13, and manual ventilation can be performed once the manual valve 13 is pressed.

[0061] The technical solution of the present invention is further explained below in conjunction with a specific embodiment. It should be noted that this specific embodiment is only for those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as an unreasonable limitation on the protection scope of the present invention.

[0062] Embodiment 1 After opening the switch valve, the ventilator starts working. After the gas enters the ventilator from the gas source inlet of the air intake module, the gas is divided into two paths. One path enters the gas storage tank for storage, and the other path passes through the pressure reducing valve module, the flow valve module and the frequency valve module in turn, and finally enters the inhalation module. The gas flows out from the inhalation port to supply gas to the patient. Under normal working conditions, the valve body of the air control valve is in the upper cavity position of the air control valve, and there is no gas output at the output port of the air control valve. The four-way switch is closed, and the valve body of the two-position five-way valve is in the upper cavity position of the two-position five-way valve. There is gas output from the upper cavity of the two-position five-way valve and the alarm light is turned on. The gas pushes the second valve core to move upward, the alarm window is green, there is no gas passing through the alarm whistle, and the alarm whistle does not emit an alarm sound. When the gas source pressure in the gas storage tank is insufficient or when the breathing circuit of the ventilator and the patient is detached, the alarm window is red, gas passes through the alarm whistle, and the alarm whistle emits an alarm sound.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pneumatic visual and acoustic alarm device for a ventilator, characterized in that: include: Air intake module, air storage tank, switch valve and alarm module; The air intake module, the air storage tank and the alarm module are connected and communicated in sequence; The alarm module includes an air-controlled valve, an acoustic alarm, an OR door, a four-way switch, an alarm light and a two-position five-way valve; The upper cavity of the air-controlled valve is connected to the air storage tank, the four-way switch is connected to the alarm light and the lower cavity of the air-controlled valve, the OR gate is respectively connected to the lower cavity of the two-position five-way valve, the sound alarm and the lower cavity of the air-controlled valve, the alarm light is connected to the upper cavity of the two-position five-way valve, the alarm light includes a first valve core and a second valve core, the second valve core is slidably mounted on the outer side wall of the first valve core, the switch valve is connected to the air intake module and the upper cavity of the two-position five-way valve, so as to push the second valve core to overlap with the first valve core.

2. The pneumatic visual and acoustic alarm device for a ventilator according to claim 1, characterized in that: The alarm light also includes an alarm housing, an alarm window, a compression spring and a base. The base is connected to the four-way switch and the upper cavity of the two-position five-way valve. The alarm housing is fixedly connected to the base and the alarm window. The first valve core is fixedly arranged inside the alarm window. The compression spring is arranged between the alarm housing and the second valve core to push the second valve core to slide with the first valve core.

3. The pneumatic visual and acoustic alarm device for a ventilator according to claim 1, characterized in that: It also includes a first trigger and a pressure sampling connector, wherein the first trigger is connected to the pressure sampling connector and the upper cavity of the two-position five-way valve.

4. The pneumatic visual and acoustic alarm device for a ventilator according to claim 3, characterized in that: It also includes a pressure reducing valve module and an air intake module, and the air intake module, the pressure reducing valve module and the air intake module are connected and communicated in sequence.

5. The pneumatic visual and acoustic alarm device for a ventilator according to claim 4, characterized in that: The inhalation module comprises an air-oxygen mixing valve, an air whistle, a safety valve, a quick exhaust valve, an airway pressure high alarm valve and an inhalation port. The air-oxygen mixing valve, the safety valve, the quick exhaust valve, the airway pressure high alarm valve and the inhalation port are connected and communicated in sequence. The airway pressure high alarm valve is communicated with the air whistle so that the air whistle will sound an alarm when the pressure in the airway is too high.

6. The pneumatic visual and acoustic alarm device for a ventilator according to claim 4, characterized in that: It also includes a flow valve module, which is arranged between the pressure reducing valve module and the air inhalation module.

7. The pneumatic visual and acoustic alarm device for a ventilator according to claim 6, characterized in that: It also includes a pressure gauge, a second trigger and a frequency valve module. The pressure sampling joint, the pressure gauge, the second trigger and the frequency valve module are connected and communicated in sequence, and the frequency valve module is communicated with the flow valve module.

8. The pneumatic visual and acoustic alarm device for a ventilator according to claim 7, characterized in that: The switch valve is connected to the pressure reducing valve module and the frequency valve module.

9. The pneumatic visual and acoustic alarm device for a ventilator according to claim 8, characterized in that: A manual valve is also included, and the manual valve is arranged between the pressure reducing valve module and the air suction module.

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