31 results about "Hypobaric chamber" patented technology

A hypobaric chamber is adapted to receive the affected body part to be treated through an entry port formed in one wall of the chamber. An aperture is formed at the entry port for creating a loose, non-occlusive seal around the body part of the patient, the aperture comprising an adjustable iris formed from a pliable material attached to the edges of the entry port and having a center opening to which are attached the inner ends of a plurality of iris leaves or slides. The pliable material is stretched between the edges of the entry port and the inner ends of the slides to form a diaphragm-like structure. In the preferred embodiment, the pliable material is latex or some other rubber-like material. The seal is adjustable by moving the slides radially to adjust the portion of the port that is covered by the pliable material. The inner edges of the slides are positioned so that a small gap exists between the skin and the edge of the seal, allowing unrestricted air flow-through. The leak created by the loose seal is overcome by a high-volume pump which is connected to the chamber via appropriate vacuum tubing. The chamber pressure is reduced to create a mild negative pressure, on the order of −50 mmHg or less below ambient pressure.

A reduced pressure treatment appliance is provided for enclosing and providing reduced pressure treatment to an object or a portion of an object. In some embodiments, the reduced pressure treatment appliance may be used to treat wounds and other conditions, such as lymphedema, varicose veins, venous insufficiency and stasis, and other infirmities. In other embodiments, the appliance may be used to provide reduced pressure (or vacuum) treatment for non-medical purposes. In some embodiments, the appliance comprises a flexible chamber and a collapsible frame that may be collapsed while the appliance is not in use. In yet other embodiments, the appliance also includes a vacuum system to supply reduced pressure to the volume within the chamber, a pressurized fluid system to inflate the collapsible frame, a drainage system to remove fluids from the appliance, and a treatment port and a forced entry treatment system to introduce fluids and other treatment instrumentalities into the volume within the chamber. In still other embodiments, the chamber is designed for use with distal extremital portions of a body. In further embodiments, the appliance also comprises a semi-permeable liner positioned between the chamber and the portion of a body to be treated. Finally, methods are provided for using various embodiments of the appliance.

A hypobaric apparatus and methods capable of inducing and maintaining in stored horticultural cellular tissue controlled pervaporation of undesired chemical compounds without reaching the boiling point of intracellular water molecules, comprising a hypobaric chamber constructed to provide a leak rate of less than 4.0 mm Hg per hour, sensors and regulators coupled to the chamber and to a controller to measure and regulate target correlates. Commodities processed, including processing storage periods longer than any known involving controlled atmosphere, exhibit an absence of low oxygen injury, high carbon dioxide injury, chilling injury, leaf abscission, leaf de-greening, fungal decay, bacterial decay, gravitational curving, geotropic curvatures, leaf epinasty, stem epinasty, flower fading, senescence, live invertebrates at any life stage, fumigant chemical compounds, volatile fungicides, volatile bactericides; no advance in ripening; minimal water loss.

The invention provides smoldering smoke particle collecting equipment for an electrical conductor, which comprises a smoke generating device, a smoke collecting cover and a ventilating pipe, wherein the smoke generating device is provided with a power supply; the smoke collecting cover is arranged on the smoke generating device and further forms a smoke collecting chamber with the smoke generating device; the ventilating pipe is communicated with the smoke collecting chamber; the smoke collecting cover and the ventilating pipe are both provided with a smoke particle collector; the smoke particle collectors comprise collecting barrels, electromagnets, protecting sleeves and movable rods; springs and iron columns are arranged in the collecting barrels; one ends of the springs are connected with the bottom ends of the collecting barrels; the iron columns are connected with the springs; the electromagnets are connected with the power supply and are further all positioned at the other endsof the springs together with the iron columns; the protecting sleeves are connected with the collecting barrels; the movable rods are sleeved in the protecting sleeves in a sliding way and are further connected with the iron columns; and the movable rods are provided with smoke particle collecting meshes. By using the smoldering smoke particle collecting equipment for the electrical conductor, which is provided by the invention, the automatic collection of the smoldering smoke particles of the electrical conductor is achieved; a conventional manual collecting way is avoided; and the collection of the smoke particles in the environments of some environment simulating experimental devices (such as a hypobaric chamber and a drop tower) and the like, which are not applicable to manual collection, is achieved.

The invention discloses a modularized medium-voltage solid soft starter cabinet, which comprises a removable type hypobaric chamber arranged on the upper part of a cabinet body, a hyperbaric chamber arranged at the back part of the removable type hypobaric chamber, and a cable chamber arranged below the cabinet body, wherein a hypobaric chamber door is arranged on the front part of the removable type hypobaric chamber, one side of the hypobaric chamber is locked by using a bolt, and the other side of the hypobaric chamber is provided with a hinge; the front part of the cable chamber is provided with a cable chamber door, one side of the cable chamber door is fixed on a bending angle at one side of the cabinet body by adopting a screw lock; the cable chamber door can be opened by only dismantling the screw lock; the other side of the cable chamber door is provided with a hinge; an incoming wire and a outgoing wire of the soft starter cabinet are connected in the cable chamber; a fuse module is arranged in the cable chamber, the fuse module is connected with a rear copper bar by using a cable; and the fuse module can be installed or dismantled at any time according to the requirement of a user. Due to the adoption of a modular structure, the modularized medium-voltage solid soft starter cabinet has the advantages of convenience for transportation and maintenance and flexibility in installation.

The invention discloses a device and a method for testing combustion characteristics of a material in a low-pressure oxygen-enriched environment. The device comprises a low-pressure cabin body, an ignition device, a weighing device, an oxygenation system, an exhaust system, a closed-loop pressure control system and an online flue gas detection and analysis system, wherein the closed-loop pressure control system annularly sleeves the bottom of the low-pressure cabin body, the closed-loop pressure control system is connected with the oxygenation system, the low-pressure cabin body is respectively connected with the closed-loop pressure control system and the exhaust system, the weighing device is arranged in the low-pressure cabin body, an area above the weighing device is a reaction area, the ignition device extends into the internal reaction area from the outside of the low-pressure cabin body through an ignition rod, and the online flue gas detection and analysis system is connected with the low-pressure cabin body. By means of the device, the combustion characteristics of the material in the low-pressure oxygen-enriched environment can be efficiently and accurately experimented and analyzed, and pressure at different altitudes can be simulated.

The present invention relates to a system for detecting microbial contamination of a liquid specimen comprising a device for concentrating micro-organisms from a liquid specimen, having (i) a hypobaric chamber, (ii) a filter housing comprising a liquid-permeable bed of an adsorbent material and adapted for being fluidly connected to said hypobaric chamber, and (iii) a vacuum pump adapted for being fluidly connected to said hypobaric chamber, said system further comprising a kit for detection of micro-organisms adsorbed to said adsorbent material, wherein said kit is based on enzymatic detection using chromogenic and / or fluorescent substrate analogues.

The invention provides a flight simulator. The flight simulator comprises a hypobaric chamber, a data acquisition system and a data analysis system. The low-pressure cabin is used for providing a low-pressure, low-oxygen and / or pressure-relief flight simulation environment. And the data acquisition system is used for acquiring training data of the flight simulator and / or trainees in the low-pressure, low-oxygen and / or pressure-released flight simulation environment. And the data analysis system determines a flight simulation training result according to the training data. By adopting the configuration, the flight simulator can collect training data of trainees in extreme environments such as low pressure, low oxygen, instant pressure release and the like, and incorporate the training data into the assessment and evaluation range of flight simulation training, thereby improving the accuracy and comprehensiveness of the evaluation result of the flight simulation training.

A hypobaric apparatus and methods capable of inducing and maintaining in stored horticultural cellular tissue controlled pervaporation of undesired chemical compounds without reaching the boiling point of intracellular water molecules, comprising a hypobaric chamber constructed to provide a leak rate of less than 4.0 mm Hg per hour, sensors and regulators coupled to the chamber and to a controller to measure and regulate target correlates. Commodities processed, including processing storage periods longer than any known involving controlled atmosphere, exhibit an absence of low oxygen injury, high carbon dioxide injury, chilling injury, leaf abscission, leaf de-greening, fungal decay, bacterial decay, gravitational curving, geotropic curvatures, leaf epinasty, stem epinasty, flower fading, senescence, live invertebrates at any life stage, fumigant chemical compounds, volatile fungicides, volatile bactericides; no advance in ripening; minimal water loss.

The invention discloses a construction method for a hypoxic fast-acclimation animal model. The hypoxic fast-acclimation animal model constructed by the method has a simple molding method, the method only requires fasting in advance to make rats adapt to the environment, and acclimation is performed in a hypobaric chamber at the air pressure height of 4500 m; the method has a low cost and short cycle, the model can be formed at the fastest speed in 34 h, and the molding rate is high and can reach 100%; and the model provided by the invention has good repeatability and stability, and can gradually transition to human experiments.

The invention discloses a low-pressure chamber connection throat structure. The low-pressure chamber connection throat structure is characterized by comprising a chamber door component (1), wherein an oil cylinder rod (2) is arranged below the chamber door component (1) and connected with an oil cylinder component (7); an airtight door frame (3) is arranged above the chamber door component (1); a fixed hook (4) for the chamber door component (1) is arranged on the side of the airtight door frame (3); a power ring (5) with a bump is arranged at the inner side of the fixed hook (4) and connected with a pneumatic rotary motor (6). The throat structure has the beneficial effects that: A, a power ring hook opening structure is adopted, so that synchronous opening of the hook is ensured; B, the opening power of the chamber door component is controlled by air pressure, so the reliability is high; the hydraulic cylinder mechanism in the structure can reset the chamber door and also can ensure stable opening of the chamber door; a buffer spring is arranged on the system, so that the chamber door does not rebound after buffer is started, the low-pressure chamber connection throat structure has a reliable sealing effect, is simple in structure, and fast to start, and can be repeatedly used.

The invention provides an air passage system of a hypobaric chamber. The hypobaric chamber comprises a chamber body. The chamber body is provided with an air inlet pipe, a first air exhaust pipe and asecond air exhaust pipe. A though hole is arranged in the chamber body. The hypobaric chamber also comprises a controller, a vacuum pump, a main air pipe and at least one pressure sensor. The vacuumpump communicates with one end of the main air pipe. Both the first air exhaust pipe and the second air exhaust pipe communicate with the other end of the main air pipe. The main air pipe is providedwith a main valve. A first electromagnetic valve is arranged on the air inlet pipe. The first air exhaust pipe is equipped with a second electromagnetic valve. The second air exhaust pipe is providedwith a proportioning valve. The pressure detector, the first electromagnetic valve, the second electromagnetic valve and the proportioning valve are all electrically connected with the controller. Vacuum pressure of the chamber body of the hypobaric chamber is controlled through multiple pipelines. Additionally, vacuum pressure is detected in a real-time manner. Additionally, the invention is alsoprovided with a protection system which can effectively protect a user in the chamber.

The invention relates to a control method and system for a hypobaric chamber, and the method comprises the steps: enabling a carbon dioxide sensor, a temperature and humidity sensor and a pressure sensor to be respectively used for detecting the real-time environment information in a hypobaric chamber, and transmitting the real-time environment information to a controller; and using the controllerfor controlling a pressure switch, a pressure regulating valve and a vacuum pump according to the real-time information so as to realize the pressure increasing, reducing and maintaining processes ofthe environment in the hypobaric chamber.

The invention provides a vacuum pressure control method for a low-pressure cabin, and the low-pressure cabin comprises a cabin body, wherein the interior of the cabin body is a cabin room. The specific control method comprises the steps: increasing the vacuum pressure of the cabin room at a constant speed to a preset pressure value, wherein the preset pressure value is a pressure value corresponding to the altitude of 1400-1500 m; maintaining the preset pressure value of the cabin room for 40-45 minutes; and finally returning the vacuum pressure of the cabin room to the normal pressure. The method can meet the requirements of the safety and comfort of a user, enables the physiological index of the user not to change severely, and cannot cause the excessive discomfort of ears. According tothe invention, the structure can achieve the timely and accurate control, and provides guarantee for the actual operation steps.

The invention provides a hypobaric chamber structure which comprises a chamber body; a chamber door is arranged on the chamber body; a cross section of the middle part of the chamber body is rectangular; end plates are arranged on two ends of the chamber body; the two end plates are both in a hemispherical or conical shape protruding outwardly; and the chamber body is formed by connecting and splicing of a plurality of frame bodies in series. A plurality of observation windows are arranged in the chamber body. The middle portion of the hypobaric chamber structure of the present invention is arectangular cross-section; the end plates at both ends are hemispherical or conical; the end plates can meet the strength requirement with a single-layer plate structure; and the bottom portion of thechamber body is provided with casters that can move up and down; when the casters stretch out, movement of the overall structure is facilitated; and when the caster retracts, the chamber body can besteadily placed on the ground through pads.

The present invention discloses an experimental animal low-pressure cabin for plateau medicine research, and a pressure control method based on the experimental animal low-pressure cabin, and belongs to the technical field of medical scientific research instrument equipment. The experimental animal low-pressure cabin comprises a work cabinet and an electrical cabinet arranged on the bottom portion of the work cabinet, wherein the work cabinet adopts the full transparent design so as to easily meet the illumination requirements of the experimental animals and make the laboratory personnel easily perform real time observation on the experimental animals, a gas inlet pipe extending into the work cabinet and a gas discharge pipe extending into the work cabinet are arranged inside the electrical cabin, the gas inlet pipe and the gas discharge pipe are respectively provided with an electrically controlled proportional valve and a diaphragm vacuum pump, an electrical program control system is further arranged inside the electrical cabinet, and a PLC controller adjusts the dynamic balance between the gas complementing amount and the gas exhaust amount by controlling the opening degree of the electrically controlled proportional valve and the opening of the diaphragm vacuum pump so as to make the altitude fluctuation be maintained at a certain level. According to the present invention, the air pressure control way used by the control method of the present invention is unique, the fluctuation range is small, the accuracy is high, and the number of the gas exchange can be ensured.

The invention discloses a hydraulic / pneumatic high pressure relief valve. The pressure relief valve can utilize low-pressure oil / gas as power and adapt to high-pressure oil unloading and is small in size, light and high in reliability, and remote pressure relief can be achieved. The hydraulic / pneumatic high pressure relief valve overall structurally comprises a high-pressure bin, a low-pressure bin and a connecting flange used for connecting the high-pressure bin and the low-pressure bin. According to the pressure relief valve, the manner of combining a columnar valve and a ball valve is adopted, so that sealing of high-temperature and high-pressure oil is guaranteed. When pressure relief is needed, low-pressure oil (gas) input by the low-pressure bin is utilized, a needle-shaped ejector rod is pushed to open a sealing ball and a columnar valve element of the high-pressure bin, and pressure relief is completed. To avoid vibration and noise and prevent a sealing component from being eroded, a special changing throttling bin clearance channel is designed, and therefore the pressure of flowing high-pressure oil is reduced through water head losing. After pressure relief, the oil flows along with the clearance and flows out of a pressure relief valve oil return connector.

The invention provides a pressure communication valve device for a hypobaric chamber. The pressure communication valve device comprises a communication valve rod, a communication valve seat, a sealing gasket and a check block, wherein the communication valve seat is welded on a chamber door; a threaded through hole is transversely formed in the middle of the communication valve seat; the communication valve rod is a hollow screw rod and is in threaded connection with a through hole in the middle of the communication valve seat; a groove is formed in the middle of the communication valve rod; the length of the groove in the communication valve rod is larger than that of the threaded through hole in the middle of the communication valve seat; the check block is fixed at the right end of the communication valve rod; and the sealing gasket is fixed to the left end face of the check block. The variable-frequency variable-air-volume air pressure balancing system is simple in structure and convenient to use, the valve can be opened and closed inside and outside the chamber, the gas discharging function of the micro-pressure environment is guaranteed, and good sealing property is achieved when the valve is closed.

The invention relates to a hypobaric chamber mode control method and device, and the method comprises the steps: matching whether a user needs to preheat in front of a hypobaric chamber mode or not according to the hypobaric chamber mode selected by the user; if the user needs to be preheated, setting the preheating time and frequency according to the identity ID of the user; and when the user reaches the preset time and frequency, starting the hypobaric chamber mode selected by the user for the user. In order to prevent the user from randomly using some experience modes, the preheating time and frequency are set for different user IDs, and the related experience modes can be used only when the set preheating time and frequency are reached, so the use safety and use rationality of the userare ensured. And different experience control schemes are provided for the user.

The invention discloses a modularized medium-voltage solid soft starter cabinet, which comprises a removable type hypobaric chamber arranged on the upper part of a cabinet body, a hyperbaric chamber arranged at the back part of the removable type hypobaric chamber, and a cable chamber arranged below the cabinet body, wherein a hypobaric chamber door is arranged on the front part of the removable type hypobaric chamber, one side of the hypobaric chamber is locked by using a bolt, and the other side of the hypobaric chamber is provided with a hinge; the front part of the cable chamber is provided with a cable chamber door, one side of the cable chamber door is fixed on a bending angle at one side of the cabinet body by adopting a screw lock; the cable chamber door can be opened by only dismantling the screw lock; the other side of the cable chamber door is provided with a hinge; an incoming wire and a outgoing wire of the soft starter cabinet are connected in the cable chamber; a fuse module is arranged in the cable chamber, the fuse module is connected with a rear copper bar by using a cable; and the fuse module can be installed or dismantled at any time according to the requirement of a user. Due to the adoption of a modular structure, the modularized medium-voltage solid soft starter cabinet has the advantages of convenience for transportation and maintenance and flexibility in installation.

The invention provides a vacuum pressure control method for a low-pressure cabin, and the low-pressure cabin comprises a cabin body. The interior of the cabin body is provided with a cabin room. The method specifically comprises the steps: increasing the vacuum pressure of the cabin room at a constant speed to a first pressure value, wherein the first pressure value is a pressure value corresponding to the altitude of 1400-1500 m; maintaining the first pressure value of the cabin room for 5-7 minutes; decreasing the vacuum pressure of the cabin room at a constant speed to a second pressure value, wherein the second pressure value is a pressure value corresponding to the altitude of 250-350 m; repeatedly carrying out the above three steps and returning the vacuum pressure of the cabin roomto a normal pressure. The method can meet the requirements of the safety and comfort of a user, enables the physiological index of the user not to change severely, and cannot cause the excessive discomfort of ears. According to the invention, the structure can achieve the timely and accurate control, and provides guarantee for the actual operation steps.

According to the unmanned vehicle low-power power pack four-coincidence flexible test device provided by the invention, through the integrated design of the system, the low-pressure cabin, the low-temperature cabin and the vibration table can be safely and reliably matched to work, and the test accuracy and the working condition simulation precision are improved; the six-degree-of-freedom vibration table is used for simulating the vibration condition of the power assembly under the actual driving working condition of the vehicle, and various reliability problems can be tested; the low-temperature cabin is adopted, so that the extreme high-low temperature environment can be simulated, and the power performance of the power pack in the high-low temperature environment and the reliability of parts under the comprehensive influence of temperature and vibration can be assessed; a low-pressure cabin is adopted, a high-altitude environment can be simulated, and the problems that engine power is reduced, an air supply system is not matched with engine performance and the heat dissipation capacity of a cooling system is reduced are tested; the device provided by the invention is suitable for performance bench test of unmanned vehicle power packs of any size, and realizes accurate simulation of various use condition environments of a real vehicle.

The invention provides a vacuum pressure control method for a low-pressure cabin, and the low-pressure cabin comprises a cabin body, wherein the interior of the cabin body is a cabin room. The specific control method comprises the steps: increasing the vacuum pressure of the cabin room at a constant speed to a first pressure value, wherein the first pressure value is a pressure value correspondingto the altitude of 900-1000 m; maintaining the first pressure value of the cabin room for 5-7 minutes; decreasing the vacuum pressure of the cabin room at a constant speed to a second pressure value,wherein the second pressure value is a pressure value corresponding to the altitude of 250-350 m; increasing the vacuum pressure of the cabin room at a constant speed to the first pressure value, andmaintaining he first pressure value for 30-35 minutes; and finally returning the vacuum pressure of the cabin room to the normal pressure. The method can meet the requirements of the safety and comfort of a user, enables the physiological index of the user not to change severely, and cannot cause the excessive discomfort of ears. According to the invention, the structure can achieve the timely and accurate control, and provides guarantee for the actual operation steps.

The invention discloses an animal hypobaric chamber group and an application method thereof. According to the animal hypobaric chamber group and the application method thereof, the hypobaric chamber group is provided with a plurality of hypobaric chambers, all the hypobaric chambers are independent from one another, a plurality of environment experiments with different pressure values can be guaranteed to be carried out at the same time within the same time period, meanwhile, after one hypobaric chamber experiment is completed, treatment can be carried out independently, the continuation of other hypobaric chamber experiments cannot be affected, and therefore the experimental cost can be lowered, the experimental time can be shortened, and the comparability and reliability of the effects of the same batch of experiments can be ensured; the fundamental anti-hypoxic prevention countermeasure, namely oxygen supply can be realized, and the animal hypobaric chamber group is connected to oxygen bottles through gas inlets for oxygen supply research; and under an anoxic condition of a certain height, according to an aviation oxygen supply principle, oxygen concentration of different levels(different physiological equivalent heights) can be realized by adjusting the oxygen concentration of sucked gas.

The invention provides smoldering smoke particle collecting equipment for an electrical conductor, which comprises a smoke generating device, a smoke collecting cover and a ventilating pipe, wherein the smoke generating device is provided with a power supply; the smoke collecting cover is arranged on the smoke generating device and further forms a smoke collecting chamber with the smoke generating device; the ventilating pipe is communicated with the smoke collecting chamber; the smoke collecting cover and the ventilating pipe are both provided with a smoke particle collector; the smoke particle collectors comprise collecting barrels, electromagnets, protecting sleeves and movable rods; springs and iron columns are arranged in the collecting barrels; one ends of the springs are connected with the bottom ends of the collecting barrels; the iron columns are connected with the springs; the electromagnets are connected with the power supply and are further all positioned at the other endsof the springs together with the iron columns; the protecting sleeves are connected with the collecting barrels; the movable rods are sleeved in the protecting sleeves in a sliding way and are further connected with the iron columns; and the movable rods are provided with smoke particle collecting meshes. By using the smoldering smoke particle collecting equipment for the electrical conductor, which is provided by the invention, the automatic collection of the smoldering smoke particles of the electrical conductor is achieved; a conventional manual collecting way is avoided; and the collection of the smoke particles in the environments of some environment simulating experimental devices (such as a hypobaric chamber and a drop tower) and the like, which are not applicable to manual collection, is achieved.

The present application provides a cooling and ventilation simulation device and a control method for high-altitude airborne equipment testing, comprising: an air source, a filter, a pressure reducing valve, a flow control unit, a refrigerator, a heater and a back pressure valve connected in sequence, The output end of the back pressure valve is connected to the low-pressure cabin, and the high-altitude airborne equipment is tested in the low-pressure cabin; the air source is used to output high-pressure air, the filter is used to filter out particles and oily impurities in the air, and the pressure reducing valve is used to reduce the high-pressure air. The flow control unit is used to control the set flow of the decompressed air, the refrigerator and the heater are used to adjust the temperature of the air, and the back pressure valve is used to stabilize the pressure difference between the cooling ventilation system and the low pressure chamber. The beneficial effects of the present application are: the low-pressure cooling and ventilation environment is provided for the low-pressure chamber through the ventilation device of the present application, so that the test environment is closer to the real working condition; and the ventilation device of the present application can also realize the controllable flow, pressure and temperature of the ventilation, Ensure the stability of the test environment.

The invention provides a cooling ventilation simulation device for testing high-altitude airborne equipment and a control method, the cooling ventilation simulation device comprises a gas source, a filter, a pressure reducing valve, a flow control unit, a refrigerator, a heater and a back pressure valve which are connected in sequence, the output end of the back pressure valve is connected with alow-pressure cabin, and the high-altitude airborne equipment is tested in the low-pressure cabin; wherein the air source is used for outputting high-pressure air, the filter is used for filtering particles and oily impurities in the air, the pressure reducing valve is used for reducing the pressure of the high-pressure air, the flow control unit is used for carrying out set flow control on the pressure-reduced air, and the refrigerator and the heater are used for adjusting the temperature of the air. And the back pressure valve is used for stabilizing the pressure difference between the cooling ventilation system and the low-pressure cabin. The cooling ventilation simulation device has the beneficial effects that a low-pressure cooling ventilation environment is provided for the low-pressure cabin through the ventilation device, so that a test environment is closer to a real working condition; moreover, the ventilation device provided by the invention can also realize controllable ventilation flow, pressure and temperature, so that the stability of a test environment is ensured.

The invention provides a power-off protection system of a hypobaric chamber. The system comprises a chamber body; a cabin is arranged inside the chamber body; a first air pipe, a second air pipe and athird air pipe are penetrated through the chamber body; a solenoid valve is arranged on the first air pipe; a portion, inside the chamber body, of the second air pipe is provided with a first hand-operated valve; a portion, outside the chamber body, of the third air pipe is provided with a second hand-operated valve; and the solenoid valve is electrically connected with a power supply system. According to the invention, the three air pipes are arranged; one of the three air pipes is provided with the solenoid valve; and the other two are provided with the hand-operated valves. In the power outage, the solenoid valve is automatically opened, and the hand-operated valves can be manually opened inside and outside the chamber body, separately, to form multiple protection on users of the chamber body.