Micro-resistance triggers automatic inhalation regulator

Abstract

The present invention discloses a micro-resistance triggered automatic inhalation regulator, which relates to the technical field of oxygen inhalation equipment, including an upper cavity and a lower cavity, a diaphragm is arranged between the upper cavity and the lower cavity, a valve body is also connected to the bottom of the lower cavity, an oxygen supply external interface and an oxygen inhalation external interface are arranged on the valve body, an inner channel connected to the oxygen supply external interface and an outer duct connected to the oxygen inhalation external interface are also arranged inside the valve body, the inner channel and the outer duct are both connected to the lower cavity, an opening and closing device is also installed on the inner channel, the opening and closing device is connected to the diaphragm, and the opening and closing device can open and close the inner channel through the up and down movement of the diaphragm. The inner channel and the outer duct are separated in the present invention, so that valve injection can be generated, the jet makes the gas not generate vortex, reduces the phenomenon of gas resistance and disturbance, and the separated inner and outer ducts can prevent cross infection; the opening and closing device is arranged on the inner channel, the high-pressure oxygen supply pressure is reduced to the low-pressure oxygen inhalation pressure, so that the oxygen supply pressure remains stable, so that the application range of the device is wider.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen inhalation equipment, in particular to a micro-resistance triggered automatic inhalation regulator. Background Art

[0002] In the process of disease treatment, oxygen inhalation is a common treatment method for patients. At present, in places where oxygen inhalation is required, such as medical hyperbaric oxygen chambers, diving decompression chambers, plateau oxygen inhalation, shield pressure transition chambers, and normal pressure oxygen inhalation, most of the respiratory equipment used is a built-in respiratory device such as a micro-resistance triggered automatic inhalation regulator and a bellows. However, during the clinical oxygen inhalation process, patients often complain about the large oxygen inhalation resistance, insufficient oxygen supply output, and the "sucking" problem, so they have to change other oxygen inhalation methods or give up clinical treatment. However, changing the breathing method will cause many hidden dangers, especially for medical hyperbaric oxygen chambers. If other open self-flowing oxygen inhalation methods (such as continuous oxygen supply, some are also called "self-flowing oxygen") are used, the exhaled waste oxygen is directly discharged into the cabin, causing abnormal cabin pressure, which will cause major safety hazards to the equipment. Moreover, the current domestic micro-resistance triggered automatic inhalation regulator generally has the phenomenon of sharing the inhalation cavity and the air supply cavity. During use, not only does the air supply cavity produce large turbulence and resistance, but the user is also very likely to have cross infection. The oxygen absorption resistance of the micro-resistance triggered automatic inhalation regulator mainly comes from the micro-resistance triggered automatic inhalation regulator and the bellows. The bellows, as the name implies, is due to the corrugation inside the tube, so when the gas flows through the corrugated pipeline, it will generate greater eddy resistance.

[0003] According to the current situation described above, there is an urgent need for a micro-resistance-triggered automatic inhalation regulator that can effectively reduce the patient's oxygen inhalation resistance and will not cause cross-infection problems. Summary of the invention

[0004] In view of the above defects, the purpose of the present invention is to provide a micro-resistance triggered automatic inhalation regulator, which solves the problem of large oxygen inhalation resistance of clinical patients. The micro-resistance triggered automatic inhalation regulator has small oxygen inhalation resistance, and the oxygen inhalation and oxygen supply pipelines are completely isolated, avoiding cross infection in the breathing process, and has extremely high economic benefits and broad social benefits.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A micro-resistance triggered automatic inhalation regulator comprises a cavity, wherein the cavity comprises an upper cavity and a lower cavity, a diaphragm is arranged between the upper cavity and the lower cavity, a valve body is further connected to the bottom of the lower cavity, an oxygen supply external interface and an oxygen inhalation external interface are arranged on the valve body, an inner channel connected to the oxygen supply external interface and an outer duct connected to the oxygen inhalation external interface are further arranged inside the valve body, the inner channel and the outer duct are both connected to the lower cavity, an opening and closing device is further installed on the inner channel, the opening and closing device is in contact with the diaphragm, and the opening and closing device can open and close the inner channel by the up and down movement of the diaphragm.

[0007] The inner duct is arranged at the central axis position of the valve body, and a plurality of outer ducts are arranged around the inner duct.

[0008] Wherein, the plurality of outer ducts are evenly distributed around the circumference of the inner duct.

[0009] Wherein, the diaphragm comprises a pressure-sensitive diaphragm, and an elastic diaphragm is fixedly connected around the pressure-sensitive diaphragm, and the elastic diaphragm is clamped and fixed between the upper cavity and the lower cavity.

[0010] Wherein, a corrugated pre-relaxation structure is arranged on the elastic diaphragm.

[0011] Among them, the opening and closing device includes a valve core, the outer side of the valve core is sealed and fixed to the inner channel, an intake channel is arranged in the middle of the valve core, a valve lifter is arranged on the top of the valve core, the valve lifter is in contact and sealed with the intake channel, a valve rocker is arranged between the valve lifter and the elastic diaphragm, and a return spring is also arranged between the valve lifter and the inner channel.

[0012] A sealing gasket is arranged at the contact position between the bottom end of the valve lifter and the intake passage, and an outwardly protruding rounded edge is arranged at the contact position between the top end of the intake passage and the valve lifter, and the rounded edge contacts and seals with the sealing gasket.

[0013] Wherein, a balance port is arranged at the top of the upper cavity, and the balance port connects the outside with the upper cavity.

[0014] Wherein, the ratio of the cross-sectional diameter of the upper cavity to the diameter of the balancing port is 4:1 to 1.5:1.

[0015] Wherein, the ratio of the cross-sectional diameter to the height of the cavity is 6:1 to 4:1.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] The micro-resistance triggered automatic air intake regulator of the present invention includes a cavity, the cavity includes an upper cavity and a lower cavity, a diaphragm is arranged between the upper cavity and the lower cavity, a valve body is also connected to the bottom of the lower cavity, an oxygen supply external interface and an oxygen inhalation external interface are arranged on the valve body, an inner duct connected to the oxygen supply external interface and an outer duct connected to the oxygen inhalation external interface are also arranged inside the valve body, the inner duct and the outer duct are both connected to the lower cavity, an opening and closing device is also installed on the inner duct, the opening and closing device is in contact with the diaphragm, and the opening and closing device can open and close the inner duct by the up and down movement of the diaphragm. The inner duct and the outer duct of the present invention are separated, each of which goes its own way without interfering with each other, which can effectively avoid cross infection during the breathing process; a separate valve body is connected to the lower chamber, and a separate oxygen inhalation channel and an oxygen supply channel are arranged on the valve body, so that oxygen can be valve-jetted at the oxygen supply outlet, and the gas injected into the bellows does not generate vortex, thereby reducing the resistance and disturbance of the gas in the bellows and greatly reducing the oxygen inhalation resistance; an opening and closing device is arranged on the inner duct, so that micro-resistance triggers the automatic inhalation regulator. According to the principles of human respiratory medicine, it is driven and controlled by lung breathing and synchronized with lung breathing, that is, oxygen is supplied during inhalation and oxygen is supplied in an interrupted or intermittent manner during exhalation, forming a scuba oxygen supply mode. Through the scuba oxygen supply mode, the high-pressure oxygen supply pressure can also be reduced to a low-pressure oxygen inhalation pressure, and the oxygen supply pressure can always be kept stable, so that the pressure-bearing application range of the device is wider.

[0018] Since the inner channel is set at the center axis of the valve body, multiple outer channels are set around the inner channel. Through this structure, the gas entering the inner channel with amplified flow can be ejected outward through the multi-channel outer channels, thus realizing the "small gas controls the large air" method, with the suction and intake going their own way and effectively separated.

[0019] Since multiple outer ducts are evenly distributed around the inner duct, the airway layout is scientific and reasonable, without mutual interference, and less likely to produce disturbances such as eddies.

[0020] Since the diaphragm includes a pressure-sensitive diaphragm, the pressure-sensitive diaphragm is fixedly connected with an elastic diaphragm around it, and the elastic diaphragm is clamped between the upper cavity and the lower cavity. The pressure-sensitive diaphragm is fixed with the elastic diaphragm around it to respond to changes in pressure difference, thereby greatly increasing the sensitivity of the diaphragm.

[0021] Since the corrugated pre-relaxation structure is arranged on the elastic diaphragm, the instantaneous back pressure can be effectively eliminated, the effective area of ​​the pressure-sensitive diaphragm can be increased, the starting resistance can be reduced, and the stress caused by the back-and-forth movement of the diaphragm can be effectively resolved, so as to extend the service life of the diaphragm.

[0022] Since the opening and closing device includes a valve core, the outer side of the valve core is sealed and fixed with the inner channel, an air intake channel is arranged in the middle of the valve core, a valve tappet is arranged on the top of the valve core, the valve tappet is in contact and sealed with the air intake channel, a valve rocker is arranged between the valve tappet and the elastic diaphragm, and a return spring is arranged between the valve tappet and the inner channel. This structure can apply downward pressure to the valve rocker through the back and forth movement of the elastic diaphragm, and pry the valve tappet out of the inner channel through the valve rocker, thereby realizing the opening of the inner channel; when the oxygen inhalation is finished, the return spring resets the valve tappet again, thereby realizing the function of the micro-resistance triggering automatic inhalation regulator to supply and close oxygen according to human breathing, and realizing the scuba-style oxygen inhalation mode.

[0023] Since a sealing gasket is arranged at the contact position between the bottom end of the valve tappet and the intake passage, a rounded cutting edge is arranged at the top end of the intake passage and the flap of the valve tappet, and the cutting edge contacts the sealing gasket. Line contact with the cutting edge is adopted instead of surface contact, so the sealing effect is good and the soft seal is not damaged.

[0024] Since the top of the upper cavity is provided with a balance port, the balance port is connected with the outside and the upper cavity. By providing the balance port, the pressure sensing capability of the device can be enhanced and the sensitivity can be improved.

[0025] Since the ratio of the cross-sectional diameter of the upper cavity to the diameter of the balance port is 4:1 to 1.5:1, the balance port is designed as a large opening, which greatly expands the pressure-bearing area of ​​the diaphragm, effectively improves the sensitivity of the diaphragm, and achieves the effect of synchronous micro-triggering. If necessary, the diaphragm can also be pressed by hand to open the internal tract oxygen supply. At this time, the micro-resistance triggers the automatic inhalation regulator to continuously supply a large amount of oxygen to the breathing bag or other auxiliary oxygen supply equipment, or manually modulate and verify the oxygen supply flow, or change the lung oxygen supply to continuous oxygen supply.

[0026] Since the ratio of the cross-sectional diameter to the height of the upper and lower cavities is 6:1 to 4:1, the cross-sectional area of ​​the upper and lower cavities is enlarged and the height is reduced. Under the same volume capacity, the diaphragm area is enlarged, thereby reducing the downward working displacement of the diaphragm, that is, increasing the ratio between the working outer diameter of the diaphragm and the working displacement of the diaphragm. In this way, the resistance caused by the up and down movement of the diaphragm can be reduced, and the service life of the diaphragm can be increased.

[0027] To sum up, the micro-resistance triggered automatic inhalation regulator of the present invention solves the technical problem of large oxygen inhalation resistance of the micro-resistance triggered automatic inhalation regulator in the prior art. The micro-resistance triggered automatic inhalation regulator of the present invention combines the valve jet oxygen supply and the scuba dual oxygen supply mode, thereby realizing free breathing with micro-resistance, which greatly promotes the future development of the oxygen supply industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the micro-resistance triggered automatic air intake regulator of the present invention;

[0029] Figure 2 yes Figure 1 A top view of the middle valve body;

[0030] Figure 3 yes Figure 1 A partial enlarged view of middle A;

[0031] Figure 4 yes Figure 1 A partial enlarged view of B in the middle;

[0032] In the figure: 10, cavity, 11, upper cavity, 110, balance port, 12, lower cavity, 120, air pressure regulating hole, 13, diaphragm, 130, elastic diaphragm, 131, pressure-sensitive diaphragm, 20, valve body, 21, outer duct, 22, inner duct, 221, concave step surface, 23, oxygen supply external interface, 24, oxygen absorption external interface, 30, opening and closing device, 31, valve rocker, 32, valve tappet, 33, baffle, 34, bolt, 35, gasket, 36, valve core, 361, rounded edge, 362, intake channel, 37, sealing ring, 38, sealing pad, 39, return spring, 40, fixing plate. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] The directions mentioned in this specification are based on the directions shown in the drawings and only represent relative positions, not absolute positions.

[0035] like Figure 1As shown, a micro-resistance triggered automatic inhalation regulator is connected to an oxygen supply pressure reducer in front and a breathing device in the back. It is a very critical device to ensure oxygen supply according to cabin pressure and lung breathing volume. It includes a cavity 10, and the cavity 10 includes an upper cavity 11 and a lower cavity 12. A diaphragm 13 is arranged between the upper cavity 11 and the lower cavity 12. The diaphragm 13 separates the upper cavity 11 and the lower cavity 12 into two independent cavities with balanced pressure. A balancing port 110 is arranged at the top of the upper cavity 11, and the balancing port 110 connects the outside with the upper cavity 11. The ratio of the cross-sectional diameter of the upper cavity 11 to the diameter of the balancing port 110 is 4:1 to 1.5:1. The balancing port 110 is designed as a large opening, which greatly expands the pressure-bearing area of ​​the diaphragm 13, effectively improves the sensitivity of the diaphragm, and achieves the effect of synchronous micro-triggering. If necessary, the diaphragm can also be pressed by hand to open the internal tract oxygen supply. At this time, the micro-resistance triggers the automatic inhalation regulator to supply a large amount of oxygen to the breathing bag or other auxiliary oxygen supply equipment continuously, or the oxygen supply flow can be manually modulated and verified, or the lung oxygen supply can be changed to continuous oxygen supply. In order to prevent other non-professionals from touching the diaphragm of the micro-resistance triggering automatic inhalation regulator without authorization, the device should be placed in a tool box. The ratio of the cross-sectional diameter to the height of the cavity 10 is 6:1 to 4:1. In a cavity with the same volume of oxygen capacity, the cross-sectional area of ​​the cavity 10 is enlarged and the height is reduced, so that the diaphragm area in the middle of the cavity 10 is enlarged. After the oxygen flows out, the downward working displacement of the diaphragm is relatively reduced, that is, the ratio between the working outer diameter of the diaphragm and the working displacement of the diaphragm is increased. The effective working area of ​​the diaphragm can be increased, the starting resistance can be reduced, and the service life of the diaphragm can be increased.

[0036] like Figure 1 As shown, the diaphragm 13 includes a pressure-sensitive diaphragm 131, and an elastic diaphragm 130 is fixedly connected around the pressure-sensitive diaphragm 131, and the elastic diaphragm 130 is clamped between the upper cavity 11 and the lower cavity 12. The diaphragm 13 is used to respond to the change of the pressure difference, and the elastic diaphragm 130 is pushed up and down by the pressure difference. The elastic diaphragm 130 is made of elastic high-quality silicone rubber material with secondary corrugation pre-relaxation. This new diaphragm made of a special mold has the characteristics of good elasticity, lightness, and anti-aging. The pressure-sensitive diaphragm 131 is made of high-quality stainless steel material. The pressure-sensitive diaphragm 131 is flat and smooth, and has a certain strength and elasticity. This diaphragm can effectively eliminate the back pressure generated instantly, increase the effective working area of ​​the pressure-sensitive diaphragm, reduce the starting resistance, and can effectively resolve the stress caused by the back and forth movement of the diaphragm, so that the service life of the diaphragm is longer.

[0037] like Figure 1 and Figure 2As shown, a pressure regulating hole 120 is provided at the bottom of the lower cavity 12, a valve body 20 is connected to the pressure regulating hole 120, an oxygen supply external interface 23 is provided at the middle of the side of the valve body 20, and an oxygen absorption external interface 24 is provided at the bottom of the valve body 20. The inlet of the oxygen supply external interface 23 is made of stainless steel or copper. A threaded structure is provided on the oxygen supply external interface 23, and it is connected to the external breathing gas system (or emergency gas supply system) through the threaded structure. The threaded connection is adopted, the connection is firm and simple, the sealing effect is good, and sufficient oxygen supply can be guaranteed. The type of the oxygen absorption external interface 24 refers to the DISS (International Safety Standard Connector Type) standard connector or is distinguished by the color of the connecting pipe according to the different gas media, so as to reduce the risk of wrong connection to the minimum and ensure the product quality. The oxygen absorption external interface 24 is designed according to the requirements of the external nominal size commonly used at home and abroad, and is made of stainless steel, with a standard outer diameter of Φ22mm, and has a taper and an end flange, which can be quickly disconnected from the bellows without falling off.

[0038] In order to further improve the sensitivity of the micro-resistance triggered automatic air intake regulator, reduce the resistance during oxygen inhalation, and reduce and control the change of the outlet pressure of the micro-resistance triggered automatic air intake regulator. The present invention is developed in accordance with the principles of advanced air path control systems at home and abroad, and with reference to the air path control methods of aerospace, and an optimized design of flow amplification is added to the valve body 20, that is, the valve body 20 is designed with a core-stage inner channel 22 (main injection air intake channel) and a multi-channel outer duct 21 (reverse injection channel) equivalent to flow amplification. The specific structure of the outer duct 21 and the inner duct 22 is as follows:

[0039] An inner channel 22 is arranged at the center axis position of the valve body 20, and the oxygen supply external interface 23 penetrates into the interior of the valve body 20 and communicates with the inner channel 22. The upper part of the inner channel 22 is communicated with the lower cavity 12 through the air pressure regulating hole 120. A plurality of microporous throat channels, namely, outer ducts 21, are evenly arranged around the outer side of the inner channel 22. The outer duct 21 runs through the valve body 20, and the upper part of the outer duct 21 is communicated with the lower cavity 12 through the air pressure regulating hole 120, and the lower part is connected to the oxygen absorption external interface 24. The lower cavity 12 and the oxygen absorption external interface 24 form a throttling at the outer duct 21. In this embodiment, the number of the outer ducts 21 is preferably six. In actual design, it can be designed according to the oxygen supply and the size of the valve body, such as four or eight, which is not limited in this embodiment. The outer duct 21 is communicated with the oxygen absorption external interface 24. The inner channel 22 and the outer duct 21 are both communicated with the lower cavity 12 above the valve body 10.

[0040] like Figure 1 , Figure 3 and Figure 4As shown in the figure, an opening and closing device 30 is also installed on the inner channel 22, and the opening and closing device 30 is in contact with the diaphragm 13. The opening and closing device 30 can open and close the inner channel 22 by the up and down movement of the diaphragm 13. A concave step surface 221 is provided on the inner channel 22. The opening and closing device 30 includes a valve core 36, which is a copper valve core. The valve core 36 is located in the inner channel 22, and the outer side of the valve core 36 is engaged with the concave step surface 221 of the inner channel 22. A sealing ring 37 is provided between the valve core 36 and the concave step surface 221. An air inlet channel 362 is provided in the middle of the valve core 36, and a rounded edge 361 protruding outward is provided at the port position of the air inlet channel 362. The edge surface of the rounded edge 361 is smooth and flat. A valve tappet 32 ​​is arranged on the top of the valve core 36. The diameter of the valve tappet 32 ​​is smaller than the inner channel 22. A gap is left between the valve tappet 32 ​​and the inner channel 22 for gas to pass through. A sealing gasket 38 is arranged on the bottom of the valve tappet 32. The sealing gasket 38 and the rounded edge 361 are contact-sealed. A valve rocker 31 is arranged between the valve tappet 32 ​​and the elastic diaphragm 130. The valve rocker 31 is in an inclined state. One end of the valve tappet 32 ​​is fixed to the top of the valve tappet 32 ​​by a bolt 34 and a washer 35, and the other end is in contact with the elastic diaphragm 130. The valve rocker 31 can pry up the valve tappet 32 ​​fixed at the other end through the pressure of the elastic diaphragm 130 on one end through the principle of leverage. A baffle 33 is also fixed on the top of the inner channel 22. The outer diameter of the baffle 33 is larger than the diameter of the inner channel 22, and the inner diameter of the baffle 33 is larger than the diameter of the valve tappet 32. A step surface is provided on one end of the valve tappet 32 ​​that contacts the valve core 36 , and a return spring 39 is provided between the step surface and the baffle 33 , and the return spring 39 is a compression spring.

[0041] The lubricating materials and sealing materials (including sealing rings, gaskets, etc.) used in this device have good flame retardant and anti-oxidation properties and are harmless to the human body. The pipe components and valves used in this device must be strictly degreased, purged and cleaned.

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown together, the working process of the micro-resistance triggered automatic inhalation regulator of the present invention is as follows:

[0043] When the person just starts to breathe oxygen, the negative pressure value at the end of the oxygen inhalation external interface 24 changes slightly. Through the outer duct 21 on the valve body 10, a negative pressure difference is immediately generated in the lower cavity 12, and the original balance between the upper cavity 11 and the lower cavity 12 is instantly destroyed, which then triggers the elastic diaphragm 130 and the pressure-sensitive diaphragm 131 between the upper cavity 11 and the lower cavity 12 to move downward, thereby generating a force on one end of the valve rocker 31, and then the valve rocker 31 pries up the valve tappet 32, thereby opening the intake channel of the inner duct 22. Oxygen breaks through the valve inflection point, and a large amount of gas enters the lower cavity 12 along the inner duct 22, and then passes through the outer duct 21 to shoot toward the bellows and generate jet power. The pressurized oxygen supply gas is shot toward the bellows through the outer duct 21, thereby greatly reducing the resistance loss, turbulence and gas impact along the way of the bellows. The decompressed intake gas can pass through a longer bellows to achieve the effect of oxygen inhalation equipment and meet the oxygen inhalation effect of personnel.

[0044] The micro-resistance-triggered automatic air intake regulator of the present invention controls the opening and closing of the airway in real time and synchronously through the valve tappet 32, the dynamic valve rocker 31 and other devices, thereby reducing the intake pressure and playing the role of regulating the oxygen inhalation pressure. Since the oxygen supply pressure is relatively high, but the pressure required at the breathing point of the personnel is relatively low, the micro-resistance-triggered automatic air intake regulator of the present invention can reduce the high-pressure oxygen supply gas to low-pressure gas, and can ensure that the required working pressure always maintains a stable oxygen supply state, so this device can also be called a "secondary pressure reducer".

[0045] The oxygen absorption resistance of the micro-resistance triggered automatic inhalation regulator of the present invention is only 20% of similar domestic products through simulation tests, which completely solves the problem of large oxygen absorption resistance that plagues clinical patients. The product is a major product technology upgrade and major scientific and technological innovation in the field of respiratory equipment in my country, with extremely high economic benefits and extensive social benefits. The present invention adopts the valve nozzle injection method, which greatly reduces the laminar flow and turbulent flow losses caused by the inherent shape of the bellows. Especially for top-mounted oxygen inhalation equipment, the technical advantages of the present invention are more obvious and more practical.

[0046] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A micro-resistance triggered automatic inhalation regulator, comprising a cavity, wherein the cavity comprises an upper cavity and a lower cavity, and a diaphragm is arranged between the upper cavity and the lower cavity, characterized in that: The bottom of the lower cavity is also connected to a valve body, and an oxygen supply external interface and an oxygen absorption external interface are arranged on the valve body. An inner channel connected to the oxygen supply external interface and an outer bypass channel connected to the oxygen absorption external interface are also arranged inside the valve body. Both the inner channel and the outer bypass channel are connected to the lower cavity. An opening and closing device is also installed on the inner channel, and the opening and closing device is in contact with the diaphragm. The opening and closing device can open and close the inner channel through the up and down movement of the diaphragm; The inner channel is arranged at the central axis of the valve body, and a plurality of outer channels are arranged around the inner channel; The plurality of outer ducts are evenly distributed around the circumference of the inner duct; The diaphragm comprises a pressure-sensitive diaphragm, and an elastic diaphragm is fixedly connected around the pressure-sensitive diaphragm. The elastic diaphragm is clamped and fixed between the upper cavity and the lower cavity.

2. The micro-resistance triggered automatic inhalation regulator according to claim 1, characterized in that: The elastic diaphragm is provided with a corrugated pre-relaxation structure.

3. The micro-resistance triggered automatic inhalation regulator according to claim 2, characterized in that: The opening and closing device includes a valve core, the outer side of the valve core is sealed and fixed to the inner channel, an intake channel is arranged in the middle of the valve core, a valve tappet is arranged on the top of the valve core, the valve tappet is in contact and sealed with the intake channel, a valve rocker is arranged between the valve tappet and the elastic diaphragm, and a return spring is also arranged between the valve tappet and the inner channel.

4. The micro-resistance triggered automatic inhalation regulator according to claim 3, characterized in that: A sealing gasket is arranged at the contact position between the bottom end of the valve lifter and the intake passage, and an outwardly protruding rounded edge is arranged at the contact position between the top end of the intake passage and the valve lifter, and the rounded edge contacts and seals with the sealing gasket.

5. The micro-resistance triggered automatic inhalation regulator according to claim 1, characterized in that: A balance port is arranged at the top of the upper cavity, and the balance port connects the outside with the upper cavity.

6. The micro-resistance triggered automatic inhalation regulator according to claim 5, characterized in that: The ratio of the cross-sectional diameter of the upper cavity to the diameter of the balancing port is 4:1 to 1.5:

1.

7. The micro-resistance triggered automatic inhalation regulator according to claim 1, characterized in that: The ratio of the cross-sectional diameter to the height of the cavity is 6:1 to 4:1.

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