WO2019223627A1 - 一种便携式气体供应装置及呼吸辅助系统 - Google Patents

一种便携式气体供应装置及呼吸辅助系统 Download PDF

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Publication number
WO2019223627A1
WO2019223627A1 PCT/CN2019/087492 CN2019087492W WO2019223627A1 WO 2019223627 A1 WO2019223627 A1 WO 2019223627A1 CN 2019087492 W CN2019087492 W CN 2019087492W WO 2019223627 A1 WO2019223627 A1 WO 2019223627A1
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WO
WIPO (PCT)
Prior art keywords
gas
air
supply device
pipe
check mechanism
Prior art date
Application number
PCT/CN2019/087492
Other languages
English (en)
French (fr)
Inventor
孙一鑫
Original Assignee
昆山远山天地软件技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 昆山远山天地软件技术有限公司 filed Critical 昆山远山天地软件技术有限公司
Priority to US17/056,617 priority Critical patent/US20210205640A1/en
Publication of WO2019223627A1 publication Critical patent/WO2019223627A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/02—Respiratory apparatus with compressed oxygen or air
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/006—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort with pumps for forced ventilation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A62B18/025—Halfmasks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/06—Mouthpieces; Nose-clips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0075—Bellows-type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves

Definitions

  • the present application relates to a portable gas supply device and a breathing assistance system.
  • portable air purification equipment is mainly a mask, especially a filter having a filtering function.
  • the mask itself has filtering properties, and the negative pressure formed at the mouth and nose when inhaling through the mouth and nose allows air to pass through the mask and be filtered.
  • the breathing increases the resistance.
  • the resistance brought by the mask will increase the burden on the breather. Therefore, it is more difficult to run or exercise or do other physical expenditure activities while wearing a mask on a haze day. Because the human body must breathe quickly when doing physical exertion activities, and can no longer accept the additional resistance of wearing a mask. Therefore, people who are running or exercising or doing other physical exertion activities outside in the severe haze. Can only abandon this kind of physical expenditure activities or suffer from haze during the activities.
  • the purpose of this application includes providing a portable gas supply device and a breathing assistance system for providing a user with purified air.
  • a portable gas supply device includes a gas source and a gas delivery unit; the gas source is configured to provide purified air; the gas delivery unit includes a gas delivery mechanism, a buffer air bag, and a first gas check mechanism;
  • the gas delivery mechanism has a gas channel, an inlet end of the gas channel is connected to a gas source, and an outlet end of the gas channel is used to output purified air;
  • the buffer airbag is in communication with the gas channel or the air source, the first gas check mechanism is installed in the gas channel, and the first gas check mechanism is configured to be unidirectional from the inlet end to the outlet end.
  • the gas delivery mechanism includes a first pipe, the first gas check mechanism is installed in the first pipe, and the buffer airbag is installed in the first pipe.
  • the side wall or the air source air outlet end, the air inlet and the air outlet of the buffer airbag are independent of each other or the same.
  • the gas delivery mechanism includes a first pipe, the first gas check mechanism is installed in the first pipe, and the buffer airbag is installed closer to the gas than the first gas check mechanism. Location of air supply.
  • the first gas check mechanism is installed at an air inlet end, an air outlet end, or an intermediate portion of the first pipe.
  • the gas delivery mechanism includes a first pipe and a second pipe
  • the buffer airbag has an air inlet and an air outlet
  • the air outlet of the buffer airbag is connected to the first pipe
  • the first gas check mechanism is installed in the first pipe, one end of the second pipe is connected to the air inlet of the buffer airbag, and the other end is connected to an air source.
  • the air inlet and the air outlet may be disposed on opposite sides of the buffer airbag, or may be adjacent or on the same side.
  • the buffer airbag is concealed and disposed at or beside the air source.
  • a protective shell may be provided, for example, the buffer airbag is hidden in the protective shell.
  • the air source includes an air storage tank or an air purification device that stores purified air.
  • the buffer airbag is made of a flexible and air-impermeable material.
  • the first gas check mechanism includes a check structure.
  • the present application also provides a respiratory assistance system, which includes an isolation cover for covering the mouth and nose, a second gas check mechanism, and any one of the foregoing portable gas supply devices.
  • the isolation cover is made of a material capable of isolating gas. Made, the isolation cover has an air inlet and an air outlet, the air inlet is connected to the outlet end of the gas channel, and the second gas check mechanism is configured to allow gas to unidirectionally pass from the gas The exhalation port exits the isolation cover.
  • a sealing strip is provided on the edge of the isolation cover, that is, a part for contacting the skin of the face, and the sealing strip is made of silicone or rubber and has elasticity and softness. Made of materials.
  • the second gas check mechanism includes a check structure, and the check structure is installed on the isolation cover and located at the exhalation port.
  • the second gas check mechanism includes a check structure and an exhaust pipe, and the exhaust pipe is installed at the exhalation port of the isolation cover, and the check structure It is installed in the exhaust pipe or the exhalation port of the isolation cover.
  • the isolation cover is made of a hard or soft material that is impermeable to air.
  • the beneficial effects of the present application include, for example, that the technical problems to be solved by the portable gas supply device and the respiratory assistance system obtained through the above design in the present application have not been mentioned or disclosed in the prior art.
  • Rhythmic breathing and the different characteristics of the gas source produce gas at a constant speed.
  • Purified air is either in short supply or underutilized for the first time.
  • the close cooperation between the buffer gas bag and the first gas check mechanism can reduce the net gas waste caused by the mismatch of supply and demand rhythms, thereby saving costs and extending the use time.
  • this kind of gas supply device can reduce the difficulty of breathing for users, and avoid wearing hypoxia for a long time.
  • FIG. 1 is a schematic diagram of a portable gas supply device according to an embodiment of the present application.
  • FIG. 2 is a schematic view of a check structure in which the buffer airbag and the first gas check mechanism in the exhalation phase are a swing-type structure;
  • FIG. 3 is a schematic view of a check structure in which a buffer air bag and a first gas check mechanism in a suction phase are a swing-type structure;
  • FIG. 4 is a schematic diagram of a portable gas supply device with a first gas check mechanism having a valve structure provided in an embodiment of the present application, which is in an exhalation phase;
  • FIG. 5 is a schematic diagram of a portable gas supply device with a first valve check mechanism having a valve structure provided in an embodiment of the present application, which is in an inhalation stage;
  • FIG. 6 is a schematic diagram of a portable gas supply device with a first gas check mechanism having a valve structure provided in an embodiment of the present application, which is in an exhalation phase;
  • FIG. 7 is a schematic diagram of a portable gas supply device with a first gas check mechanism having a valve structure provided in an embodiment of the present application, in a suction phase;
  • FIG. 8 is a schematic diagram of a first gas check mechanism as a piston-type structure, which is in an exhalation phase;
  • FIG. 9 is a schematic diagram of a first gas check mechanism as a piston type structure, in a suction phase
  • FIG. 10 is a schematic diagram of a respiratory assistance system according to an embodiment of the present application.
  • Icons 100-portable gas supply device; 120-buffer airbag; 130-first gas check mechanism; 140-first pipeline; 150-second pipeline; 200-respiratory assistance system; 210-isolation cover; 220-second Gas check mechanism.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality” is two or more, unless it is specifically and specifically defined otherwise.
  • the terms “installation,” “connected,” “connected,” and “fixed” should be understood broadly unless otherwise specified and limited, for example, they may be fixed connections or removable connections , Or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of the two elements or the interaction between the two elements.
  • installation should be understood broadly unless otherwise specified and limited, for example, they may be fixed connections or removable connections , Or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of the two elements or the interaction between the two elements.
  • the "first" or “under” of the second feature may include the first and second features in direct contact, and may also include the first and second features. Not directly, but through another characteristic contact between them.
  • the first feature is “above”, “above”, and “above” the second feature, including that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” of the second feature, including the fact that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is less horizontal than the second feature.
  • this embodiment provides a portable gas supply device 100 including a gas source 110 and a gas delivery unit.
  • the gas delivery unit includes a gas delivery mechanism 140, a buffer airbag 120, and a first gas check mechanism 130.
  • the portable gas supply device 100 can be used by personnel in various application scenarios, including but not limited to medical personnel, chefs, and various decorators. For example, it can be carried in an environment with poor air quality, including but not limited to providing purified air for users at work or during exercise. If the user's environment is not suitable for large area air purification, then such a portable gas supply device 100 is a better choice.
  • the portable gas supply device 100 can also be used by a user during running or walking.
  • the air source 110 described in this application is configured to provide purified air.
  • the air source 110 may be a compressed air tank storing purified air, or a portable air purifier, or even a combination of the two.
  • the use time of the portable gas supply device 100 may be limited by the carrying capacity of the gas tank, or limited by the battery life or air filter life. Therefore, the applicant of this application hopes that the portable air purifier can have a higher utilization rate of purified air.
  • the portable gas supply device 100 provided in this embodiment has a gas delivery mechanism having a gas passage, an inlet end of the gas passage is connected to a gas source 110, and an outlet end of the gas passage is used to output purified air.
  • the buffer gas bag 120 is in communication with a gas channel or a gas source.
  • the first gas check mechanism 130 is installed in the gas channel. The first gas check mechanism 130 is configured to be unidirectionally guided from the inlet end to the outlet end.
  • a breathing assistance system 200 capable of providing purified air can be formed.
  • the function of the first gas check mechanism 130 is to prevent the gas from flowing backward, and in particular to prevent the gas exhaled by the user from returning to the gas supply device so as to prevent the gas exhaled by the user from contaminating the gas supply device.
  • the power for opening the first gas check mechanism 130 can come from the pressure difference formed on both sides of the first gas check mechanism 130 when the user inhales.
  • the pressure of the user's inhalation makes the first gas check mechanism 130 in an open state, and the purified air flows from the air source 110 or the buffer airbag 120 to the user At the nose and mouth, because the inhalation speed is faster than the net gas production rate of the air source, the purified air in the airbag buffer is reduced, and the airbag is reduced.
  • the pressure of the user's exhalation causes the first gas check mechanism 130 to be closed, and the user will not inhale purified air from the air source 110 at this time. However, at this time, the purified air is still continuously released from the air source 110.
  • the purified air that is not inhaled by the user will be buffered into the airbag 120, and the airbag is inflated.
  • the buffer airbag 120 is used to store the part of the purified air. If the first gas check mechanism 130 and the buffer airbag 120 are not provided, the purified air generated during the exhalation phase will be wasted.
  • the gas delivery mechanism may include a first pipe 140.
  • the first gas check mechanism 130 is installed in the first pipe 140
  • the buffer airbag 120 is installed on the side wall or the air source 110 of the first pipe 140
  • the air inlet and the air outlet of the buffer airbag 120 are independent of each other or the same.
  • the side wall of the first duct 140 may be provided with first holes and second holes distributed in the axial direction
  • the buffer airbag 120 is provided with air inlets and air outlets corresponding to the first and second holes on a one-to-one basis.
  • the first hole and the second hole are hermetically connected to the corresponding mouths and make the buffer airbag 120 communicate with the internal space of the first duct 140.
  • the side wall of the first pipe 140 may only open any one of the first hole and the second hole, and at the same time, the buffer airbag 120 may also open only one port corresponding to the hole in the side wall of the first pipe 140.
  • the first gas check mechanism 130 can be installed at any position of the first pipe 140, for example, at the air inlet end, the air outlet end, or the middle part of the first pipe 140, or even between the air outlet end of the first pipe and the isolation cover. To prevent the exhaust gas exhaled by the user from polluting the first pipe.
  • the first gas check mechanism 130 is installed in the first pipe 140, and the buffer airbag 120 is installed closer to the gas source than the first gas check mechanism 130.
  • the first gas check mechanism 130 is located between the air outlet end and the first hole in the first pipe 140 (provided that the first hole is closer to the air outlet end than the second hole) or the air outlet end of the first pipe . In this way, when the first gas check mechanism 130 is closed, the purified air can enter the buffer gas bag 120, and the exhaust gas exhaled by the user will be blocked by the first gas check mechanism 130, which will not flow back into the buffer gas bag 120 or enter the air
  • the source 110 is mixed with purified air.
  • the gas delivery mechanism includes at least a first pipe 140 and a second pipe 150
  • the buffer airbag 120 has an air inlet and an air outlet
  • the air outlet of the buffer airbag 120 is connected to the first pipe 140
  • the first gas check mechanism 130 is installed at any position of the first pipe.
  • One end of the second pipe 150 is connected to the air inlet of the buffer airbag 120 and the other end is connected to the air source 110.
  • the air inlet and the air outlet may be disposed on opposite sides of the airbag, or may be adjacent or on the same side, and may optionally be disposed on opposite sides.
  • the first gas check mechanism 130 can be installed at any position of the first pipe 140. When the first gas check mechanism 130 is closed, it can prevent the gas exhaled by the user from entering the buffer airbag 120.
  • the first gas check mechanism 130 may be installed at both ends or in the middle of the first pipe 140.
  • the first gas check mechanism 130 may also be installed at the connection between the first pipe 140 and the buffer airbag 120. In this case, it is also equivalent to being installed at the end of the first pipe 140.
  • the buffer airbag 120 may be located near the air outlet of the gas supply device, or near the air source 110, or hidden at the air source 110.
  • a protective case may be provided to hide the air source and the buffer airbag 120 in the protective case.
  • the air source 110 is optionally detachably fixed to the user, for example, it is bound to the shoulder or waist, so that the position of the air source 110 is relatively stable. Concealing the cache airbag 120 in the protective shell can ensure that the cache airbag 120 is less affected by or is not affected by the outside world, including affecting the normal expansion and contraction of the airbag 120, or preventing the cache airbag 120 from being damaged.
  • the gas delivery mechanism may include the first pipe 140, or may include the first pipe 140 and The form of the second pipe 150.
  • the air source 110 includes an air storage tank or an air purification device that stores purified air.
  • the air purification device may include a housing, a fan forming an air flow, a filter membrane structure or a filter screen for purifying air, a power source, and the like.
  • the air purifying device may be a miniaturized air purifying device so as to be easily carried around.
  • the filter may include a HEPA filter, and the HEPA filter has a better air purification effect.
  • the buffer airbag 120 is made of a flexible and air-impermeable material.
  • the buffer airbag 120 may be made of a resin film, or may be rubber, or may be a fabric coated with a gas-impermeable coating.
  • the main body of the buffer airbag 120 may be a thin film, and in addition, some rigid connection structures are matched to facilitate the connection between the airbag and the pipeline.
  • the buffer airbag 120 may only include a thin film.
  • the buffer airbag 120 is connected to the pipeline by means of bonding, and the connection is sealed.
  • the use of a flexible and air-impermeable material, especially a film does not need to overcome a large resistance when the buffer airbag 120 is inflated, that is, it is easier to inflate the buffer airbag. If the resistance required to inflate the buffer airbag 120 is too large, or even greater than the reset force of the check structure, the check structure may be pushed out.
  • the buffer airbag 120 can also be made of a rubber film, but the elasticity of the rubber film should not be designed too large.
  • the first gas check mechanism 130 may include a check structure.
  • the first gas check mechanism 130 may also adopt a valve structure to achieve unidirectional communication.
  • the first gas check mechanism 130 may use gravity or elastic force to automatically reset or close automatically. When the user inhales, a gas flow and a pressure difference are caused, and the first gas check mechanism 130 is automatically opened.
  • this embodiment also provides a breathing assistance system 200, which includes an isolation cover 210 for covering the mouth and nose, a second gas check mechanism 220, and any one of the portable gas supply devices 100 described above.
  • the isolator cover 210 is made of a material capable of isolating gas.
  • the isolator cover 210 has an air inlet and an air outlet. The air inlet is connected to the outlet end of the gas channel 140.
  • the second gas check mechanism 220 is configured to allow the gas to unidirectionally
  • the isolation cover 210 is discharged from the exhalation port.
  • the second gas check mechanism 220 is closed when the user inhales and opens when the user is exhaled.
  • the function of the isolation cover 210 is mainly to isolate rather than purify or filter the air, for example, to isolate the space at the nose and mouth from the outside, so as to facilitate inhaling the purified air provided by the air source 110 into the body, and avoid inhaling unpurified air from the outside.
  • the isolation cover 210 can isolate gas, but it is not necessarily completely and completely isolated.
  • the incomplete and absolute isolation mainly includes two factors. On the one hand, it is difficult to completely seal the isolation cover 210 from the face. The edges of the mask cannot fit the face perfectly, and there will be air leaks where the face is not fitted. The entry of purified air through the air leak will affect the purification effect of the mask.
  • the outside air is sucked in from the air leak at the edge rather than filtered and re-inhaled.
  • the user may feel relieved after wearing it, but the actual situation may be a lot of inhalation. Exhaust without knowing it.
  • the air source actively supplies air, by adjusting and increasing the air supply speed, the air pressure of the entire auxiliary breathing system can be maintained higher than the outside world, so that the air pressure inside the enclosure can be kept higher than the outside world, so that the air inside the enclosure always flows out. Prevent the outside air from being sucked in by the user through the edge leakage vent.
  • a sealing strip may optionally be provided on the edge of the isolation cover 210, that is, a part for contacting the facial skin.
  • the sealing strip may be made of a flexible and soft material such as silicone or rubber.
  • medical plastic or other hard materials can be used to make the isolation cover 210 with better air isolation effect.
  • the isolation cover 210 itself may not necessarily completely isolate the air, and some materials with poor air permeability can also be used to make the isolation cover. 210, such as some densely woven fabrics.
  • the isolation cover 210 is made of a hard or soft material that is impermeable to air.
  • the isolation cover 210 is made of a hard material or a combination of a hard material and a soft material, so that the isolation cover 210 and the nose and mouth can maintain a certain gap.
  • the isolation cover 210 maintains a gap with the nose and nose, it is more beneficial to obtain purified air from the air source 110.
  • the hardness can be increased by increasing the thickness, or it can be used in conjunction with hard materials, with the help of the skeleton structure of the hard material as a support.
  • the air inlet of the isolator cover 210 is connected to the outlet end of the gas channel 140, so that purified air can be obtained from the air source 110.
  • the second gas check mechanism 220 is opened when the user exhales, and closed when the user inhales.
  • the opening direction or conduction direction of the second gas check mechanism 220 is determined, that is, the gas can only be exhaled from the inside of the isolator and cannot be drawn into the isolator from the outside.
  • the second gas check mechanism 220 includes a check structure, and the check structure is installed on the isolation cover 210 and located at the exhalation port. It should be noted that there may be one or more inhalation ports, and in the same way, there may be one or more inhalation ports.
  • the second gas check mechanism 220 includes a check structure and an exhaust pipe, the exhaust pipe is installed in the exhalation port of the isolation cover, and the check structure is installed in the exhaust pipe or the exhaust tube and the exhalation port of the isolation cover between.
  • the structure of the first gas check mechanism 130 may be referred to, and may be the same as or different from the structure of the first gas check mechanism 130.
  • the first gas check mechanism 130 and the second gas check mechanism 220 may arbitrarily select any of the following check structures.
  • the check structure may be a swing-type structure, and the valve plate of the check structure is movably connected to the inner wall of the first pipe 140.
  • the valve plate can be maintained in a normally closed state by relying on gravity or by setting an elastic member such as a spring or a torsion spring to maintain the valve plate as shown in FIG. 2.
  • the first gas check mechanism 130 adopts a swing-type structure
  • the valve plate is opened when inhaling, and the valve plate is closed when exhaling.
  • the second gas check mechanism 220 adopts a swing-type structure, the valve plate is closed when inhaling, and the valve plate is opened when exhaling.
  • the non-return structure may be a valvular structure, and the valve of the valvular structure is elastic and can be automatically closed to block the first tube 140.
  • the valve opens when inhaling, and closes when exhaling.
  • the second gas check mechanism 220 adopts a valve structure, the valve is closed when inhaled, and the valve is opened when exhaled.
  • the portable gas supply device shown in FIGS. 4 and 5 has a buffer airbag 120 connected to a side wall of the first duct 140.
  • the portable gas supply device shown in FIGS. 6 and 7 includes a first pipe 140 and a second pipe 150, and the buffer airbag 120 is connected between the first pipe 140 and the second pipe 150.
  • the first gas check mechanism 130 is installed in the first pipe 140.
  • the embodiment of the present application also provides an optional check structure.
  • the check structure is a piston structure, which includes a valve body 130 a and a valve core 130 b.
  • the valve core 130 b is movably installed on the valve body. 130a in the valve cavity (not labeled).
  • the valve body 130a is connected to the first pipe 140, and the valve cavity of the valve body 130a is in communication with the lumen of the first pipe 140.
  • the valve core 130b Under the action of gravity, the valve core 130b usually stays at The air inlet of the valve cavity (that is, the opening near the bottom of the valve cavity in FIG. 8).
  • the valve core 130b moves up and opens the first gas check mechanism 130.
  • the valve core 130b moves down and stops the first gas.
  • the return mechanism 130 is closed.
  • the valve core 130b moves up and opens the second gas check mechanism 220.
  • the valve core 130b moves down and stops the second gas.
  • the back mechanism 220 is closed.
  • the valve core of the piston structure may be a ball plug or a plunger.
  • the number of the pipeline, the air bag and the check mechanism may be plural.
  • the portable gas supply device 100 presses the purified air into the isolation cover 210 (mask), so that the burden of breathing of the breather can be avoided, and the air source 110 of the portable gas supply device 100 can be continuously supplied.
  • Purified air and when the user is in the exhalation phase, the buffer airbag 120 stores the purified air at the air source 110 to avoid waste, and when the user is in the inhalation phase, the purified air stored in the airbag It can be used, which solves the problem of the rhythm mismatch between the gas supply at a constant speed and the user's breathing alternately.
  • the portable gas supply device of the present application uses the close cooperation of the buffer airbag and the first gas check mechanism to reduce the net gas waste caused by the mismatch of supply and demand rhythms, thereby saving costs and extending the use time. Moreover, compared with traditional masks, this kind of gas supply device can reduce the difficulty for the user to breathe and prevent the user from wearing a mask for a long time without oxygen.

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Abstract

本申请提供了一种便携式气体供应装置及呼吸辅助系统。便携式气体供应装置，包括气源和气体输送单元；气源被配置成提供净化空气；气体输送单元包括气体输送机构、缓存气囊和第一气体止回机构；气体输送机构具有气体通道，气体通道的入口端连接气源，气体通道的出口端用于输出净化空气；缓存气囊与气体通道或气源连通，第一气体止回机构安装在气体通道，第一气体止回机构被配置成由入口端向出口端单向导通。这种便携式气体供应装置，利用缓存气囊与第一气体止回机构的密切配合，能够减少因供求节律不匹配引起的净气浪费，从而节约成本并延长使用时间。

Description

一种便携式气体供应装置及呼吸辅助系统
相关申请的交叉引用
本申请要求于2018年05月21日提交中国专利局的申请号为2018104930154、名称为“一种可携带的气体供应装置及呼吸辅助系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种便携式气体供应装置及呼吸辅助系统。
背景技术
目前，便携式空气净化设备主要是口罩，尤其是具有过滤功能的口罩，通过口罩自身具有过滤属性，当通过口鼻吸气时在口鼻处形成的负压，使空气穿过口罩并被过滤。虽然空气净化了，但呼吸却增加了阻力，口罩带来的阻力会增加呼吸者的负担，因此想要在雾霾天一边戴着口罩一边跑步或者健身或者做其他大体力支出活动就比较困难了，因为人体做大体力支出活动一定会呼吸变得急促起来，无法再接受戴口罩这种额外增加的阻力了，因此在雾霾很严重的室外，跑步或者健身或者做其他大体力支出活动的人只能放弃这种大体力支出活动或者在活动中深受雾霾之害。
即使是在室内跑步或者健身，很多健身房并未提供空气净化器净化空气，如果当地已经被雾霾侵袭，虽然室内空间小仿佛看不到雾霾，但其实雾霾依旧存在，在室内跑步或者健身的人其实依旧深受其害。
还有在环境粉尘大的矿区、空气污染严重的厂区等地方工作的人，空气污染严重，劳动者虽然有口罩佩戴，但是其实工作时很费体力，带口罩同样会增加使用者吸气时的负担，为了赶工很多人就会不佩戴口罩，或者口罩用久了没及时更换，从而深受污染空气的毒害。
传统口罩的边缘很难完美的贴合人的面部，未贴合面部的地方会产生漏风口，人体吸气时由于外界空气从边缘的漏风口被吸入比从口罩过滤一下再吸入阻力小，故未经净化的空气会从漏风口进入人体呼吸系统，从而会降低口罩的净化空气效果，使用者佩戴口罩后可能心安了，但实际情况可能是吸入了很多未净化空气而浑然不觉。
发明内容
本申请的目的包括提供一种便携式气体供应装置及呼吸辅助系统，用于给使用者提供 净化空气。
本申请提供的技术方案包括：
一种便携式气体供应装置，包括气源和气体输送单元；所述气源被配置成提供净化空气；所述气体输送单元包括气体输送机构、缓存气囊和第一气体止回机构；
所述气体输送机构具有气体通道，所述气体通道的入口端连接气源，所述气体通道的出口端用于输出净化空气；
所述缓存气囊与所述气体通道或气源连通，所述第一气体止回机构安装在所述气体通道，所述第一气体止回机构被配置成由入口端向出口端单向导通。
可选地，在本申请的实施例中，所述气体输送机构包括第一管道，所述第一气体止回机构安装于所述第一管道内，所述缓存气囊安装于所述第一管道的侧壁或气源出气口端，所述缓存气囊的进气口和出气口彼此独立或者为同一个。
可选地，所述气体输送机构包括第一管道，所述第一气体止回机构安装于所述第一管道内，所述缓存气囊安装在比所述第一气体止回机构更靠近所述气源的位置。
可选地，在本申请的实施例中，第一气体止回机构安装在所述第一管道的进气端、出气端或者中间部位。
可选地，在本申请的实施例中，所述气体输送机构包括第一管道和第二管道，所述缓存气囊具有进气口和出气口，所述缓存气囊的出气口与第一管道连接，所述第一气体止回机构安装在所述第一管道，所述第二管道的一端与所述缓存气囊的进气口连接且另一端与气源连接。
可选地，在本申请的实施例中，进气口和出气口可以设置在所述缓存气囊的相对两侧，也可以在相邻或者同一侧。
可选地，在本申请的实施例中，所述缓存气囊隐藏设置在所述气源处或气源旁。
可选地，在本申请的实施例中，可以设置一个保护壳，例如将所述缓存气囊隐藏设置于所述保护壳内。
可选地，在本申请的实施例中，所述气源包括储存净化空气的储气罐或者空气净化装置。
可选地，在本申请的实施例中，所述缓存气囊由柔性且不透气的材料制成。
可选地，在本申请的实施例中，所述第一气体止回机构包括止回结构。
本申请还提供一种呼吸辅助系统，其包括用于罩设在口鼻处的隔离罩、第二气体止回机构以及上述任一种便携式气体供应装置，所述隔离罩由能够隔离气体的材料制成，所述隔离罩具有吸气口和呼气口，所述吸气口与所述气体通道的出口端连接，所述第二气体止回机构被配置成允许气体单向地从所述呼气口排出所述隔离罩。
可选地，在本申请的实施例中，在所述隔离罩的边缘，也即是用于与面部皮肤接触的部位设置密封条，所述密封条用硅胶或者橡胶等具有弹性且较柔软的材料制成。
可选地，在本申请的实施例中，所述第二气体止回机构包括止回结构，所述止回结构安装于所述隔离罩且位于所述呼气口处。
可选地，在本申请的实施例中，所述第二气体止回机构包括止回结构和排气管，所述排气管安装于所述隔离罩的呼气口，所述止回结构安装在所述排气管内或者隔离罩的呼气口。
可选地，在本申请的实施例中，所述隔离罩由不透气的硬质或者软质材料制成。
本申请的有益效果例如包括：本申请通过上述设计得到的便携式气体供应装置及呼吸辅助系统所要解决的技术问题在现有技术中未被提及或者揭示，这是本申请的发明人考虑到了人体节律式呼吸与气源匀速产生气体的不同特点，净化空气要么供不应求要么利用率不高问题的首次提出。本实施例的便携式气体供应装置，利用缓存气囊与第一气体止回机构的密切配合，能够减少因供求节律不匹配引起的净气浪费，从而节约成本并延长使用时间。而且相对于传统口罩，这种气体供应装置能够降低使用者呼吸的难度，避免使用者长时间戴口罩缺氧。
附图说明
为了更清楚地说明本申请实施方式的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1是本申请实施方式提供的一种便携式气体供应装置的示意图；
图2是呼气阶段缓存气囊及第一气体止回机构为旋启式结构的止回结构的示意图；
图3是吸气阶段缓存气囊及第一气体止回机构为旋启式结构的止回结构的示意图；
图4是本申请实施方式提供的第一气体止回机构为瓣膜式结构的便携式气体供应装置的示意图，处于呼气阶段；
图5是本申请实施方式提供的第一气体止回机构为瓣膜式结构的便携式气体供应装置的示意图，处于吸气阶段；
图6是本申请实施方式提供的第一气体止回机构为瓣膜式结构的便携式气体供应装置的示意图，处于呼气阶段；
图7是本申请实施方式提供的第一气体止回机构为瓣膜式结构的便携式气体供应装置的示意图，处于吸气阶段；
图8是一种第一气体止回机构为活塞式结构的示意图，处于呼气阶段；
图9是一种第一气体止回机构为活塞式结构的示意图，处于吸气阶段；
图10是本申请实施方式提供的呼吸辅助系统的示意图。
图标：100-便携式气体供应装置；120-缓存气囊；130-第一气体止回机构；140-第一管道；150-第二管道；200-呼吸辅助系统；210-隔离罩；220-第二气体止回机构。
具体实施方式
为使本申请实施方式的目的、技术方案和优点更加清楚，下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。因此，以下对在附图中提供的本申请的实施方式的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施方式。基于本申请中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“上”、“下”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第 一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
如图1所示，本实施例提供一种便携式气体供应装置100，其包括气源110和气体输送单元。气体输送单元包括气体输送机构140、缓存气囊120和第一气体止回机构130。这种便携式气体供应装置100可供各种应用场景中的人员使用，包括但不限于医务人员、厨师及各种装修工等。例如可以在空气质量较差的环境中携带，包括但不限于为在工作中或者运动过程中的使用者提供净化的空气。如果使用者所在的环境不适合大面积进行空气净化，那么这种便携式气体供应装置100是一种更好的选择。可选地，对于使用者在跑步或者走路过程中，也可以使用这种便携式气体供应装置100。
本申请中所描述的气源110，其被配置成提供净化空气。气源110可以是储存有净化空气的压缩式气罐，也可以是便携式的空气净化器，甚至也可以是两者的组合。
便携式气体供应装置100的使用时长，可能会受到气罐携带量的限制，或者受到电源续航能力或者空气滤芯寿命的限制。所以本申请的申请人希望便携式的空气净化器能够对净化空气有较高的利用率。
本实施例提供的便携式气体供应装置100，其气体输送机构具有气体通道，气体通道的入口端连接气源110，气体通道的出口端用于输出净化空气。缓存气囊120与气体通道或气源连通，第一气体止回机构130安装在气体通道，第一气体止回机构130被配置成由入口端向出口端单向导通。
如图10所示，当气体通道的出口端连接上面罩或者口罩或者隔离罩等即可组成一个能够提供净化空气的呼吸辅助系统200。
第一气体止回机构130的作用是防止气体逆流，特别是防止使用者呼出的气体返回气体供应装置以免使用者呼出的气体污染气体供应装置。第一气体止回机构130处于关闭状态时，能够阻止第一管道140内气体的流出。使第一气体止回机构130打开的动力，可以来自于使用者吸气时第一气体止回机构130两侧形成的压力差。
如图3所示，当使用者处于吸气的时间段时，使用者吸气的压力使得第一气体止回机构130处于打开状态，净化空气从气源110处或者缓存气囊120处流向使用者的口鼻处，由于吸气速度大于气源生产净气的速度，气囊缓存的净化空气减少，气囊缩小。如图2所示，当使用者处于呼气的时间段内，使用者呼气的压力使得第一气体止回机构130处于关闭状态，使用者这时不会从气源110处吸入净化空气，但这时净化空气仍旧从气源110处持续释放出来，最终这些未被使用者吸入的净化空气将缓存入气囊120，气囊胀大，缓存气囊120正是用于储存该部分净化空气。若没有设置第一气体止回机构130和缓存气囊120，则在呼气阶段产生的净化空气将被浪费。
可选地，在本申请的实施例中，气体输送机构可以包括第一管道140。其中第一气体止回机构130安装第一管道140内，缓存气囊120安装于第一管道140的侧壁或者气源110处，缓存气囊120的进气口和出气口彼此独立或者为同一个。换句话说，第一管道140的侧壁可以开设沿轴向分布的第一孔和第二孔，而缓存气囊120开设有与第一孔和第二孔一一对应的进气口和出气口，第一孔和第二孔与对应的口密封连接并使缓存气囊120与第一管道140的内部空间连通。第一管道140的侧壁也可以只开设第一孔和第二孔中的任一个，同时缓存气囊120也仅开设一个口与该第一管道140侧壁的孔对应。
第一气体止回机构130可以安装在第一管道140的任意位置，例如可以在第一管道140的进气端、出气端或者中间部位，甚至可以安装于第一管道出气端与隔离罩之间，用以防止使用者呼出的废气回流污染第一管道。
可选地，所述第一气体止回机构130安装于所述第一管道140内，所述缓存气囊120安装在比所述第一气体止回机构130更靠近所述气源的位置。
可选地，第一气体止回机构130位于第一管道140内的介于出气端和第一孔之间(前提是第一孔比第二孔更靠近出气端)或者第一管道的出气端。这样当第一气体止回机构130关闭时，净化空气能够进入缓存气囊120，而使用者呼出的废气会被第一气体止回机构130阻止，既不会回流进入缓存气囊120也不会进入气源110处与净化空气混合。
可选地，在本申请的实施例中，气体输送机构至少包括第一管道140和第二管道150，缓存气囊120具有进气口和出气口，缓存气囊120的出气口与第一管道140连接，第一气体止回机构130安装在第一管道的任意位置，第二管道150的一端与缓存气囊120的进气口连接且另一端与气源110连接。
进气口和出气口可以设置在气囊的相对两侧，也可以在相邻或者同一侧，可选地设置在相对两侧。第一气体止回机构130可以安装在第一管道140的任意位置，第一气体止回机构130关闭状态下，能够阻止使用者呼出的气体进入缓存气囊120。第一气体止回机构130可以安装于第一管道140的两端或者中间。第一气体止回机构130也可以安装于第一管道140与缓存气囊120的连接处，这种情况下，也相当于安装于第一管道140的端部。
缓存气囊120的位置可以是位于靠近气体供应装置的出气端，也可以是靠近气源110处，还可以隐藏在气源110处。可以设置一个保护壳，将气源和缓存气囊120隐藏在保护壳内。使用者使用时，气源110可选地采用可拆卸地连接方式固定在使用者身上，例如绑定在肩膀处或者腰部，使得气源110的位置相对比较稳定。将缓存气囊120隐藏设置在保护壳内，可以保证缓存气囊120少受或者不受外界的影响，包括影响气囊的正常伸缩，或者避免缓存气囊120被破坏等。当缓存气囊120隐藏在气源110处时，换句话说，缓存气囊120设置在气源110处的壳体内时，气体输送机构可以包括第一管道140，也可以是采 用包括第一管道140和第二管道150的形式。
可选地，气源110包括储存净化空气的储气罐或者空气净化装置。空气净化装置可以包括壳体、形成空气流的风机、净化空气的过滤膜结构或过滤网以及电源等。空气净化装置可以是小型化的空气净化装置，以便于随身携带。其中，过滤网可以包括HEPA滤网，HEPA滤网具有较佳的空气净化效果。
可选地，缓存气囊120由柔性且不透气的材料制成。例如缓存气囊120可以用树脂薄膜制成，或者也可以是橡胶，也或者可以是涂覆有不透气涂层的织物等。一方面，缓存气囊120的主体可以采用薄膜，另外配合一些硬质的连接结构，便于气囊与管道连接。另一方面，缓存气囊120也可以只包括薄膜，例如采用粘接等方式将缓存气囊120与管道连接且连接处进行密封。采用柔性且不透气的材料尤其是薄膜使缓存气囊120膨胀时无需克服较大的阻力，也就是说往缓存气囊内充气时更容易。若缓存气囊120充气需要克服的阻力过大，甚至大于止回结构的复位力，则可能会将止回结构顶开。当然缓存气囊120也可以采用橡胶薄膜制作，不过橡胶薄膜的弹力不宜设计过大。
可选地，第一气体止回机构130可以包括止回结构。第一气体止回机构130也可以采用瓣膜结构，实现单向导通。第一气体止回机构130可以利用重力或者弹力实现自动复位或者自动关闭。当使用者吸气时，引起气体流动以及压力差，使第一气体止回机构130自动打开。
这种便携式气体供应装置100所要解决的技术问题在现有技术中未被提及或者揭示，这是本申请的申请人考虑到了人体节律式呼吸与气源匀速产生气体的不同特点，净化空气要么供不应求要么利用率不高问题的首次提出。本实施例的便携式气体供应装置，利用缓存气囊与第一气体止回机构的密切配合，能够减少因供求节律不匹配引起的净气浪费，从而节约成本并延长使用时间。而且相对于传统口罩，这种气体供应装置能够降低使用者呼吸的难度，避免使用者长时间戴口罩缺氧。
如图10所示，本实施例还提供了一种呼吸辅助系统200，包括用于罩设在口鼻处的隔离罩210、第二气体止回机构220以及上述任一种便携式气体供应装置100。隔离罩210由能够隔离气体的材料制成，隔离罩210具有吸气口和呼气口，吸气口与气体通道140的出口端连接，第二气体止回机构220被配置成允许气体单向地从呼气口排出隔离罩210。第二气体止回机构220在使用者吸气时关闭，在呼气时打开。
隔离罩210的作用主要是隔离而不是净化或者过滤空气，例如将口鼻处的空间与外界隔离，以利于将气源110提供的净化空气吸入体内，而避免吸入外界未净化空气。隔离罩210能够隔离气体，但也并不一定完全绝对地隔离。不完全绝对地隔离主要包括两方面因素，一方面是隔离罩210与面部较难做到完全密封，口罩的边缘不可能完美的贴合面部， 未贴合面部的地方会产生漏风口，未经净化的空气从漏风口进入会影响口罩的净化效果，毕竟外界空气从边缘的漏风口被吸入比从口罩过滤一下再吸入阻碍小，使用者佩戴后可能心安了，但实际情况可能是吸入了很多废气而不自知。如果气源主动供气，通过调节并增加供气速度就可以保持整个辅助呼吸系统的气压大于外界，从而保持隔离罩内空气压力大于外界，从而使得隔离罩内气体始终处于向外流出状态，从而防止外界空气从边缘漏风口被使用者吸入。
为了提高密封性，可选地在隔离罩210的边缘，也即是用于与面部皮肤接触的部位设置密封条，密封条可以选用硅胶或者橡胶等具有弹性且较柔软的材料制成。另一方面，可以采用医学塑料或者其他硬质材料制成空气隔离效果较好的隔离罩210，隔离罩210自身也不一定完全隔绝空气，部分透气性较差的材料也可以用于制作隔离罩210，例如一些某些编织较为致密的织物等。
可选地，隔离罩210由不透气的硬质或者软质材料制成。可选地，隔离罩210采用硬质材料或者采用硬质材料与软质材料的组合，以使隔离罩210与口鼻能够保持一定间隙。当隔离罩210与口鼻处保持间隙时，更有利于从气源110处获取净化空气。对于软质材料可以通过增加厚度的方式提高硬度，也可以与硬质材料配合使用，借助硬质材料的骨架结构作为支撑。
隔离罩210的吸气口与气体通道140的出口端连接，进而能够从气源110处获取净化空气。
第二气体止回机构220会在使用者往外呼气的时候打开，而当使用者吸气时关闭。第二气体止回机构220的打开方向或者说导通方向是确定的，即气体只能从隔离罩内向外呼出且不能从外界吸入隔离罩内。
可选地，第二气体止回机构220包括止回结构，止回结构安装于隔离罩210且位于呼气口处。需要说明的是，吸气口可以是一个或者多个，同理呼气口也可以是一个或者多个。
可选地，第二气体止回机构220包括止回结构和排气管，排气管安装于隔离罩的呼气口，止回结构安装在排气管内或者排气管与隔离罩呼气口之间。
第二气体止回机构220的具体结构有多种选择，可以参照第一气体止回机构130的结构，可以与第一气体止回机构130的结构相同也可以不同。
第一气体止回机构130和第二气体止回机构220的可以任意选择下述止回结构结构中的任一种。
可选地，如图2和图3所示，止回结构可以是旋启式结构，止回结构的阀板与第一管道140的内壁可活动地连接。可以依靠重力或者设置弹性件例如弹簧或者扭簧等使阀板保持如图2所示的状态，以使阀板处于常闭状态。第一气体止回机构130采用旋启式结构时， 当吸气时阀板打开，呼气时阀板关闭。第二气体止回机构220采用旋启式结构时，吸气时阀板关闭，呼气时阀板打开。
如图4和图5所示，止回结构可以是瓣膜式结构，瓣膜式结构的瓣膜具有弹性，可以自动靠拢以封堵第一管道140。第一气体止回机构130采用瓣膜式结构时，当吸气时瓣膜打开，呼气时瓣膜关闭。第二气体止回机构220采用瓣膜式结构时，吸气时瓣膜关闭，呼气时瓣膜打开。
图4和图5中所示的可携带气体供应装置，其缓存气囊120连接在第一管道140的侧壁。作为可选的实施方式，图6和图7中所示的可携带气体供应装置，其包括第一管道140和第二管道150，缓存气囊120连接于第一管道140和第二管道150之间，而且第一气体止回机构130安装于第一管道140内。
本申请实施例还提供了一种可选的止回结构，请参照图8和图9，止回结构为活塞式结构，其包括阀体130a和阀芯130b，阀芯130b活动安装于阀体130a的阀腔(未标注)内。第一气体止回机构130采用活塞式结构时，阀体130a与第一管道140连接，阀体130a的阀腔与第一管道140的管腔连通，在重力作用下，阀芯130b通常停留在阀腔的进气口(即图8中靠近阀腔底部的开口)。第一气体止回机构130采用活塞式结构时，当吸气时，阀芯130b上移并使第一气体止回机构130打开，当呼气时，阀芯130b下移并使第一气体止回机构130关闭。第二气体止回机构220采用活塞式结构时，当呼气时，阀芯130b上移并使第二气体止回机构220打开，当吸气时，阀芯130b下移并使第二气体止回机构220关闭。其中，活塞式结构的阀芯可以是球塞也可以是柱塞。
在本申请的实施例中，管道、气囊及止回机构的数量可以为多个。
本实施例提供的便携式气体供应装置100，通过把净化好的空气压入隔离罩210(口罩)，这样能免除呼吸者吸气的负担，便携式气体供应装置100的气源110处能够持续地供应净化好的空气，而当使用者处于呼气阶段时，缓存气囊120将气源110处的供应的净化空气储存起来，避免浪费，而当使用者处于吸气阶段时，储存于气囊的净化空气可以被利用，这样解决了气源匀速供气与使用者呼吸交替用气之间的节律不匹配问题。
以上所述仅为本申请的优选实施方式而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。
工业实用性
本申请的便携式气体供应装置，利用缓存气囊与第一气体止回机构的密切配合，能够减少因供求节律不匹配引起的净气浪费，从而节约成本并延长使用时间。而且相对于传统 口罩，这种气体供应装置能够降低使用者呼吸的难度，避免使用者长时间戴口罩缺氧。

Claims (16)

  1. 一种便携式气体供应装置，其特征在于，包括气源和气体输送单元；所述气源被配置成提供净化空气；所述气体输送单元包括气体输送机构、缓存气囊和第一气体止回机构；
    所述气体输送机构具有气体通道，所述气体通道的入口端连接所述气源，所述气体通道的出口端用于输出净化空气；
    所述缓存气囊与所述气体通道或所述气源连通，所述第一气体止回机构安装在所述气体通道，所述第一气体止回机构被配置成由入口端向出口端单向导通。
  2. 根据权利要求1所述的便携式气体供应装置，其特征在于，所述气体输送机构包括第一管道，所述第一气体止回机构安装于所述第一管道内，所述缓存气囊安装于所述第一管道的侧壁或所述气源处，所述缓存气囊的进气口和出气口彼此独立或者为同一个。
  3. 根据权利要求1所述的便携式气体供应装置，其特征在于，所述气体输送机构包括第一管道，所述第一气体止回机构安装于所述第一管道内，所述缓存气囊安装在比所述第一气体止回机构更靠近所述气源的位置。
  4. 根据权利要求2或3所述的便携式气体供应装置，其特征在于，所述第一气体止回机构安装在所述第一管道的进气端、出气端或者中间部位。
  5. 根据权利要求1所述的便携式气体供应装置，其特征在于，所述气体输送机构包括第一管道和第二管道，所述缓存气囊具有进气口和出气口，所述缓存气囊的出气口与第一管道连接，所述第一气体止回机构安装在所述第一管道，所述第二管道的一端与所述缓存气囊的进气口连接且另一端与所述气源连接。
  6. 根据权利要求5所述的便携式气体供应装置，其特征在于，所述进气口和所述出气口可以设置在所述缓存气囊的相对两侧，也可以在相邻或者同一侧。
  7. 根据前述权利要求中任一项所述的便携式气体供应装置，其特征在于，所述缓存气囊隐藏设置在所述气源处或所述气源旁。
  8. 根据前述权利要求中任一项所述的便携式气体供应装置，其特征在于，所述便携式气体供应装置包括保护壳，将所述缓存气囊隐藏设置于所述保护壳内。
  9. 根据前述权利要求中任一项所述的便携式气体供应装置，其特征在于，所述气源包括储存净化空气的储气罐或者空气净化装置。
  10. 根据前述权利要求中任一项所述的便携式气体供应装置，其特征在于，所述缓存气囊由柔性且不透气的材料制成。
  11. 根据前述权利要求中任一项所述的便携式气体供应装置，其特征在于，所述第一气体止回机构包括止回结构，所述止回结构为旋启式结构的止回结构、活塞式结构的止回结构和瓣膜式结构的中的任一种。
  12. 一种呼吸辅助系统，其特征在于，包括用于罩设在口鼻处的隔离罩、第二气体止回机构以及根据权利要求1-11中任一项所述的便携式气体供应装置，所述隔离罩由能够隔离气体的材料制成，所述隔离罩具有吸气口和呼气口，所述吸气口与所述气体通道的出口端连接，所述第二气体止回机构被配置成允许气体单向地从所述呼气口排出所述隔离罩。
  13. 根据权利要求12所述的呼吸辅助系统，其特征在于，在所述隔离罩的边缘，也即是用于与面部皮肤接触的部位设置密封条，所述密封条用硅胶或者橡胶等具有弹性且较柔软的材料制成。
  14. 根据权利要求12或13所述的呼吸辅助系统，其特征在于，
    所述第二气体止回机构包括止回结构，且所述止回结构安装于所述隔离罩且位于所述呼气口处；
    或者所述第二气体止回机构包括止回结构和排气管，所述排气管安装于所述隔离罩的所述呼气口，所述止回结构安装在所述排气管内或者隔离罩的呼气口。
  15. 根据权利要求12-14中任一项所述的呼吸辅助系统，其特征在于，所述止回结构为旋启式结构的止回结构、活塞式结构的止回结构和瓣膜式结构的止回结构中的任一种。
  16. 根据权利要求12-15中任一项所述的呼吸辅助系统，其特征在于，所述隔离罩由不透气的硬质或者软质材料制成，或者由硬质材料与软质材料的组合制成。
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