30 results about "Inspired gas" patented technology

The invention relates to the field of waste gas treatment equipment, in particular to VOCs (volatile organic compounds) end treatment equipment with a circulating gas supply structure, which comprises a support guide plate for supporting, and a driven synchronous pulley for transmission is arranged on the upper end surface of the support guide plate close to the side part. By arranging the quantitative gas guide device and the compression device, when gas is intermittently and equivalently supplied to the interior of the waste gas treatment device, a servo motor can drive a transmission worm gear through a transmission worm to perform circular meshing rotation, and the transmission worm gear can synchronously drive two groups of connecting turntables to rotate; a connecting rotary disc can drive two groups of compression clamping plates to circularly move up and down in the gas guide box body through sliding limiting of a fixed sliding shaft and a fixed sliding rail, and meanwhile, a second one-way valve and a third one-way valve can automatically control opening and closing of the bottom of the gas guide box body, so that gas is equivalently sucked into the gas guide box body; the waste gas can be equivalently introduced into the waste gas treatment device for treatment, so that the accuracy and efficiency of equivalently treating the waste gas by the equipment are improved.

The invention relates to the technical field of dust removal and purification, and particularly discloses a dust removal and purification device for a furniture processing workshop, the dust removal and purification device comprises a fixed base, the top of the fixed base is fixedly connected with a supporting frame, and the end, away from the fixed base, of the supporting frame is fixedly connected with a reinforcing frame; the outer side of the dust removal device is fixedly connected with the inner side of the reinforcing frame; the multiple sets of supporting frames are arranged, and the multiple sets of supporting frames are evenly distributed on the fixed base. The dust removal device comprises a purification cylinder, a material taking opening is formed in the outer side of the purification cylinder, an air outlet pipe is communicated with the center position of the bottom of the purification cylinder, the end, away from the purification cylinder, of the air outlet pipe is communicated with an air suction pump, and a filter screen is fixedly connected to the inner wall of the purification cylinder. And an air inlet pipe penetrates through and is fixedly connected to the center of the top of the purification cylinder. The dust removal and purification device for the furniture processing workshop can extinguish sparks, wash and dehydrate sucked gas.

The utility model discloses a suction type double-gas analysis leak detector which comprises a first gas analysis chamber and a second gas analysis chamber which are independently arranged, the gas outlet end of the first gas analysis chamber and the gas outlet end of the second gas analysis chamber are connected with a vacuum pump, a first gas conveying pipe is connected to a first gas inlet of the first gas analysis chamber, and a second gas conveying pipe is connected to a second gas inlet of the second gas analysis chamber. A gas inlet II of the gas analysis chamber II is connected with a gas conveying pipe II, and a gas suction nozzle II and a gas suction nozzle I are respectively arranged on the gas conveying pipe II and the gas conveying pipe I in a front-back manner. When the concentrations of the gases sucked by the second suction nozzle and the first suction nozzle are consistent or basically close, the alarm signal is not sent out, and when the concentration of the gases sucked by the second suction nozzle at the front end is larger than that of the gases sucked by the first suction nozzle, the alarm signal of detecting a leakage point is sent out, namely, the gas leakage point exists near the second suction nozzle. And therefore, the position of the leakage point can be locked quickly, accurately and efficiently, and the leakage detection efficiency of the equipment can be greatly improved.

This humidification control system comprises an inspired gas sensor (30) that measures the flow rate of inspired gas (G1) and a control device (32) that controls a humidification device (2) on the basis of the measurement value from the inspired gas sensor (30). The control device (32) includes: an inspiration estimation unit that estimates an inspiration start time on the basis of the measurement value from the inspired gas sensor (30); an expiration estimation unit that estimates an expiration start time on the basis of the measurement value from the inspired gas sensor (30); a water supply instruction unit that provides, on the basis of the estimated inspiration start time, an instruction to start supply of water from a pump to a heater of the humidification device (2) before inspiration starts; a heater output increase instruction unit that provides, on the basis of the estimated inspiration start time, an instruction to increase the output of the heater before the inspiration starts; and a heater output reduction instruction unit that provides, on the basis of the estimated expiration start time, an instruction to reduce the output of the heater before expiration starts.

The suction type double-gas analysis leak detector comprises a first gas analysis chamber and a second gas analysis chamber which are independently arranged, the first gas analysis chamber and the second gas analysis chamber are connected with a vacuum pump, and a detection light source and a detector are arranged on the two sides of the first gas analysis chamber and the two sides of the second gas analysis chamber respectively. A gas inlet I of the gas analysis chamber I is connected with a gas conveying pipe I, a gas inlet II of the gas analysis chamber II is connected with a gas conveying pipe II, and a gas suction nozzle II and a gas suction nozzle I are respectively arranged on the gas conveying pipe II and the gas conveying pipe I in a front-back manner. When the concentrations of the gases sucked by the second suction nozzle and the first suction nozzle are consistent or basically close, the alarm signal is not sent out, and when the concentration of the gases sucked by the second suction nozzle at the front end is larger than that of the gases sucked by the first suction nozzle, the alarm signal of detecting a leakage point is sent out, namely, the gas leakage point exists near the second suction nozzle. And therefore, the position of the leakage point can be locked quickly, accurately and efficiently, and the leakage detection efficiency of the equipment can be greatly improved.

1. The name of the design product: humidifier. 2. The use of the design product: for warming and humidifying the output gas of a breathing ventilation device to ensure that the gas inhaled by the patient has appropriate humidity and temperature. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to the technical field of gas monitoring, and discloses a pumping type combustible gas alarm monitor which comprises a protective shell, the bottom of the inner wall of the protective shell is fixedly connected with a monitor body, and the right end of the protective shell is fixedly connected with a buzzer alarm. The detection position is extended through the extension pipe, a wider area can be covered, the getter pump is started, the getter pump sucks gas in the environment through the extension pipe and the exhaust pipe, then the gas is conveyed into the monitor body through the gas outlet pipe, the sucked gas is monitored through the monitor body, and the monitoring precision is improved. The detected gas is exhausted to the outside of the protective shell through the exhaust pipe, and when the monitor body detects that the concentration of the combustible gas exceeds a set safety threshold value, the buzzer alarm is triggered to give an alarm to remind field personnel to pay attention to safety and take corresponding measures, so that the safety in use is improved.

The utility model relates to the technical field of heating ventilation air conditioners, in particular to a heating ventilation air conditioner air inlet mechanism which comprises a shell, bent connecting pipes and an installation frame, the bent connecting pipes are installed at output ports in the two ends of the top of the shell through screws, and a suction fan is installed at one end in each bent connecting pipe through an installation net plate. A solar power bank facilitating power generation is mounted at the top of the shell and located on one side of the bent connecting pipe through screws; a filter element plate is stored in the shell, the filter element plate is composed of an activated carbon filter element and a non-woven fabric wrapping layer, the non-woven fabric wrapping layer is arranged on the outer surface layer of the activated carbon filter element, a sealing frame plate is installed on one side of the shell through positioning bolts, and a temperature and humidity sensor is installed at the bottom of the shell through screws; the air inlet mechanism of the heating ventilation air conditioner does not occupy the machine body space of the outdoor air conditioner, the air inlet mechanism of the outdoor air conditioner is convenient to mount and dismount, sucked air is convenient to purify, and cleanliness of indoor air is guaranteed.

The utility model relates to the technical field of material transfer, in particular to a material transfer trolley which comprises a transfer trolley body, a shell and an air supply assembly. The shell is provided with a material channel. The air supply assembly is arranged on the shell, the air supply assembly can filter and purify external air and then convey the air into the shell, when the material channel is opened or closed, the air supply assembly can keep positive air pressure in the shell, and the air supply assembly comprises an air pump and a filter part. The air pump is used for conveying external air into the shell, and when the material channel is opened or closed, the air pump can keep positive air pressure in the shell; the filtering piece is arranged at an air inlet of the air pump and used for filtering air sucked by the air pump. The filter part is arranged to filter gas sucked by the air pump, the air pump introduces the filtered gas into the shell, and the interior of the shell is kept in a positive pressure state, so that it is ensured that the gas can only flow to the outside from the shell, external air is prevented from entraining impurities to enter the shell to contaminate materials, and it is ensured that the materials are not polluted.

The invention relates to the field of air conditioning, in particular to a station air conditioning device of a character carving machine, which comprises an air inlet pipe used for introducing waste gas exhausted during operation of the character carving machine; the feeding pipe is used for introducing waste or chippings generated during operation of the character carving machine and is connected with the bottom of the air inlet pipe; the filtering mechanism is used for filtering the waste materials and the chippings; the ventilation mechanism is used for remotely conveying and processing the sucked gas; urea and oxalic acid are placed in the Z-shaped frame, the Z-shaped frame and formaldehyde in waste gas are subjected to condensation polymerization reaction, the Z-shaped frame is fixedly installed in the gas inlet pipe, the first retention plate and the second retention plate divide the Z-shaped frame into three cavities, and the station air conditioning device of the character carving machine is divided into the gas inlet pipe and a feeding pipe through pipelines. And therefore, the effects of classifying, ventilating and adjusting the chippings or peculiar smells which are generated in the lettering process of the lettering machine and influence the working environment are achieved.

This invention relates to a filtering mechanism and a novel face mask incorporating the filtering mechanism, which is installed on a face mask to filter the gas inhaled by the wearer. The filtering device includes an upper positioning cover and a hollow lower positioning frame; a filter cloth is assembled between the lower positioning frame and the upper positioning cover, and a through hole is formed on the upper positioning cover. This invention has a simple structure and ingenious design. Through the filtering mechanism, the filtering area is increased and the filtering effect is improved.

The present application relates to a filter and a new type of mask comprising the filter, which is installed on the mask for filtering the gas inhaled by the wearer, comprising a filter component, the filter component comprising a support plate, the support plate being connected with an assembling part; the support plate is formed with a through hole, and the assembling part is formed with a device opening corresponding to the position of the through hole in a corresponding manner; the through hole is in communication with the device opening; the present application has simple structure and ingenious design, and the filter is used in cooperation with the mask body, so that the use effect is more obvious, the air permeability is improved, and the use comfort of the user is improved.

A breathing hose is configured to duct inhaled and exhaled gas between a user and a rebreather apparatus. The breathing hose includes a non-collapsible flexible outer tube and a collapsible inner tube located within the non-collapsible flexible outer tube. The collapsible inner tube is configured to inflate to accommodate the exhaled gas of the user and to deflate to accommodate the inhaled gas of the user. The collapsible inner tube has a size that accommodates at least a portion of a breath volume of the user and may have a size that is configured to accommodate a maximum breath volume of the user. The collapsible inner tube is configured to act to maintain a constant total volume of gas in the lungs of the user and in the rebreather unit throughout a breathing cycle. The breathing hose may be part of a closed-circuit or semi closed-circuit rebreather apparatus.

The present invention provides an air purification system, method and air conditioner. The system includes: a primary filter module, which is used to filter the particle impurities of a first preset size in the gas sucked in by the fan under negative pressure; a secondary filter module, which is used to separate the impurities from the gas passing through the primary filter module by centrifugal action; a tertiary filter module, which is used to filter the particle impurities of a second preset size in the gas passing through the secondary filter module; the second preset size is smaller than the first preset size, and the gas passing through the tertiary filter module is sent indoors or outdoors through the fan; a reversing module, which is used to change the gas inlet channel entering the primary filter module, and the gas inlet channel includes an outdoor fresh air inlet channel and a dusty gas inlet channel inside the device with an air purification system. It can achieve both purification of the fresh air introduced from the outside and cleaning of the device with an air purification system.

To provide a compression system that reduces the gas pressure in a gas pipe and lowers the temperature of the gas being pumped to other gas pipes without improving the cooling capacity of the cooling device. [Solution] The compression system according to this embodiment comprises a compressor, a cooling device, and a control unit. The intake side of the compressor is connected to a sealed pipe to be drawn in. The exhaust side of the compressor is connected to a pipe to be supplied. The compressor can draw gas from the pipe to be drawn in and reduce the pressure of the gas in the pipe to be drawn in to a predetermined pressure. The compressor can compress the drawn-in gas to a pressure higher than the pressure of the gas in the pipe to be supplied and supply it to the pipe to be supplied. The cooling device can cool the gas supplied from the compressor to the pipe to be supplied. The control unit operates the compressor at a constant reference rotational speed to supply gas from the compressor to the pipe to be supplied. If the temperature of the gas cooled by the cooling device exceeds a threshold below the allowable temperature of the pipe to be supplied, the control unit lowers the rotational speed of the compressor to a lower than the reference rotational speed.

The invention relates to the technical field of gas detection, in particular to an underground gas detection device which comprises a protection box and a gas detector placed in the protection box, a movable groove is formed in the bottom of the protection box, a gas inlet pipe is installed at a gas inlet in the bottom of the gas detector, a gas pump is installed on the inner wall of the gas inlet pipe, and a fixing plate is fixedly connected to the side portion of the gas inlet pipe. The side portion of the fixing plate is fixedly connected to the inner wall of the protection box, the bottom of the air inlet pipe is connected with a filtering mechanism, the bottom of the filtering mechanism is connected with a corrugated pipe, the bottom of the corrugated pipe penetrates through the movable groove and then is fixedly connected with a limiting ring, and a lifting mechanism is arranged in the protection box and connected with the corrugated pipe. And impurities in the sucked gas are removed through the filtering mechanism, so that the technical defects that in the prior art, due to the fact that a large number of dust particles are contained in underground air, an exhaust hole is blocked, and the gas detection operation precision is affected are overcome, and the technical effects that the purity of an extracted gas sample is higher, and the detection effect is better are achieved.

The present invention discloses a screw air compressor rotor linear air filter assembly, which belongs to the technical field of air compressor air purification, and includes an air inlet valve arranged on the top of the left side of a chassis, a filter assembly arranged on the top of the inner cavity of the chassis, the filter assembly including a filter tank, a filter element inserted in the inner cavity of the filter tank, a sealing cover threadedly connected to the rear side of the surface of the filter tank, an air inlet pipe connected to the left side of the bottom of the filter tank, and an end of the air inlet pipe away from the filter tank is connected to the air inlet valve. The present invention compresses and stores air through the coordinated use of a chassis, a rotor structure and an air storage tank, and filters the inhaled gas through the setting of the filter assembly at the same time. The propulsion assembly and the back-blowing assembly can also be used in coordination, and the air filter element can be back-blown and cleaned after each use, so as to achieve the purpose of clean supply gas, large twin-screw compression ratio and automatic cleaning for easy maintenance.

One aspect of a ventilation device according to the present disclosure comprises: a protective enclosure that internally houses at least a portion of a refrigerant circuit through which a refrigerant circulates; an intake port that takes in outside air into the protective enclosure; an exhaust port that discharges gas from the interior of the protective enclosure; and a fan that generates airflow that proceeds from the intake port, through the interior of the protective enclosure, and is exhausted from the exhaust port. The exhaust direction at the exhaust port is a direction different from the intake direction at the intake port, and the placement of the exhaust port is optimized according to the velocity U of gas drawn in from the exhaust port and the density ρ1 of refrigerant gas.

One embodiment of the ventilation device according to the present disclosure comprises a protective housing that encloses at least a portion of a refrigerant circuit through which a refrigerant circulates, an intake port for taking in outside air into the protective housing, an exhaust port for discharging gas from the inside of the protective housing, and a fan that generates an airflow that passes from the intake port through the inside of the protective housing and is exhausted from the exhaust port, wherein the exhaust direction at the exhaust port is different from the intake direction at the intake port, and the arrangement of the exhaust port is optimized according to the wind velocity U of the gas drawn in from the exhaust port and the density ρ1 of the refrigerant gas.

The embodiment of the utility model discloses a supplementary exhaust air filtering device, which includes: a fan, an exhaust hood, a chemical filter and an exhaust pipe. In this embodiment, by arranging a chemical filter in the supplementary exhaust air filtering device, the toxic substances and gases with peculiar smell contained in the inhaled gas can be filtered through the chemical filter and then discharged. At the same time, in this embodiment, it can be used as an air supply device or an exhaust device according to different experimental environments, and the application method is flexible. When the supplementary exhaust air filtering device is used as an air supply device, a hose is connected to the first interface, and the hose is extended to the outside, the exhaust port is set indoors, and the fan is turned on to replenish fresh air from the outside into the room. When the supplementary exhaust air filtering device is used as an exhaust device, the exhaust pipe is discharged to the outside, or the exhaust pipe is connected to the outside through the second interface, and the exhaust is discharged to the outside. The fan is turned on to filter the indoor exhaust gas and discharge it.

The utility model discloses an explosion-proof gas alarm which comprises an alarm assembly, and an anti-interference assembly is arranged at the position of a gas detection port of the alarm assembly. The alarm assembly comprises a gas detector, a display panel fixed on the top surface of the gas detector, and an explosion-proof housing screwed on the outer ring of the gas detector through threads. According to the technical scheme, the anti-interference assembly is arranged at the air inlet port of the anti-explosion gas alarm, the servo fan in the air inlet pipeline is used for actively sucking air, the detection sensitivity of the alarm is improved, the conical dust filter bag and the air inlet screen plate on the front side of the air inlet pipeline can filter the sucked air, and the anti-interference effect of the anti-explosion gas alarm is improved. According to the detector, dust and sundries carried by gas are prevented from entering the detector, the interior of the detector is blocked, and the detection sensitivity is reduced, meanwhile, the drying cylinder arranged in the gas inlet pipeline can absorb moisture contained in the sucked gas, and misjudgment caused by the fact that the gas entering the detector contains moisture is prevented.

The application discloses a water and air inlet structure of a pressure package, which comprises a fluid container, a Venturi nozzle, a baffle and a float. The fluid container is provided with a containing cavity, a water inlet channel and an air inlet channel. The containing cavity is provided with a fluid inlet, and the water inlet channel and the air inlet channel are communicated with the fluid inlet. An inner wall of the air inlet channel is formed with a limiting ring, and an air inlet is arranged in the ring. The Venturi nozzle is arranged at a position where the water inlet channel is communicated with the fluid inlet. The baffle is axially limitedly matched with the outside of the air inlet to movably seal the air inlet and not to be separated from the air inlet channel. The float is arranged at the inside of the air inlet, and a convex column is arranged at the top end of the float. The convex column movably penetrates the air inlet and abuts against the baffle. The float is lifted by the pressure in the fluid container until the air inlet is closed, and the convex column lifts the baffle to open the air inlet before the float closes the air inlet. The application can control the total amount of inhaled gas when water and air are supplemented, avoid the over-high air pressure in the pressure package, and thus reduce the water inlet and outlet noise and improve the user experience during use.

The application belongs to the technical field of transformers, and discloses an adjustable assembly type transformer, which comprises a transformer main body, the top of the transformer main body is provided with an oil pillow in communication, and further comprises a supporting assembly which is fixed to the side of the transformer main body and is in communication with the oil pillow. The exhaust channel of the receiving pipe is in communication with the connecting pipe. When the weight of the drying agent in the receiving pipe in communication with the connecting pipe reaches a set value, the magnetic force of the first magnet cannot satisfy the adsorption and fixation of the receiving pipe, the receiving pipe rotates around the fixed shaft rod as the central axis, the saturated silica gel drying agent rotates to the bottom end of the fixed shell, the next receiving pipe is adsorbed by the first magnet and is in communication with the connecting pipe through the exhaust channel, and the drying agent in the next receiving pipe can dry the inhaled gas. In this process, the frequency of replacing the drying agent in the respirator can be reduced, and the cost of maintaining the respirator can be reduced.

The invention relates to the technical field of air compression, in particular to an air compression system and a roasting flat plate and system applying the same, and the air compression system comprises the following modules: a process gas collection module used for collecting process gas containing water vapor and trace solid particles; the dry type vacuum generation module is communicated with the output end of the process gas collection module through a gas inlet pipeline and is used for providing a stable vacuum source for the whole system and pressurizing and conveying the sucked gas; the gas purification and energy management module is used for receiving the pressurized gas exhausted by the dry type vacuum generation module through a connecting pipeline; and the intelligent control module is in signal connection with the dry-type vacuum generation modules and a vacuum sensor arranged in the process gas collection module, and is used for monitoring the vacuum degree of the system in real time and dynamically adjusting the operation number of the dry-type vacuum generation modules and the rotating speed of a single machine according to preset process parameters. The method has the effect of reducing energy waste.

A medium conveyance device includes a guide part that guides a medium being conveyed, a detector that is disposed to face the guide part, and a flow path forming portion that forms a flow space in which a gas can flow between the guide part and the flow path forming portion. The flow space is a space in which the gas taken in from a ventilation portion reaches an exhaust portion via the detector, and a flow velocity of the gas at the detector in the flow space is equal to or larger than a flow velocity of the gas at the ventilation portion.

The invention discloses a microbubble generation switching device, and belongs to the field of pipeline joints. Comprising a shell; a plurality of water flow channels arranged in parallel and an annular air inlet cavity arranged around the peripheries of the water flow channels are arranged in the shell; the side wall of the shell is further provided with an air inlet connector. The plurality of water flow channels are provided with lower reducing sections of which the sections are gradually reduced along the water flow direction; and a plurality of air inlet branch holes are formed in the side wall of the lower reducing section. The device has the beneficial effects that the design that a plurality of independent water flow channels are connected in parallel is adopted, and the Venturi reducing structures in all the channels are combined, so that remarkable negative pressure areas can be generated at a plurality of point positions at the same time under conventional water pressure, and gas is efficiently sucked in through the carefully-arranged gas inlet branch holes. The sucked gas is synchronously sheared and crushed by multi-channel high-speed water flow, and the gas-liquid contact area in unit volume is obviously increased, so that bubbles which are large in quantity, fine in size and uniform in distribution are generated.

The utility model is applicable to the technical field of waste recovery, and provides a PBAT (poly (butylene adipate-co-terephthalate)) film edge waste recovery device which comprises a recovery box, a feeding groove is formed in the top of the recycling box, a limiting ring is installed on the top of the inner wall of the recycling box, a fixing frame is placed at the upper end of the limiting ring, and a heating frame is installed on the lower side of the fixing frame. According to the PBAT film edge waste recovery device, the draught fan is installed on the side face of the recovery box, so that negative pressure can be generated in the recovery box, the feeding groove has the adsorption function, sucked gas is exhausted into the waste gas pipe through the draught fan, peculiar smell gas generated by film melting is prevented from being emitted outwards from the feeding groove, and the recovery effect of the PBAT film edge waste is improved. According to the liquid film heating device, the dripping liquid film can be prevented from being sucked into the air outlet groove through the baffle, the heating frame can be electrified and heated through the current-conducting plate, the heating frame does not need to be electrified through an electric wire during installation through the arrangement, and therefore the installation convenience of the liquid film heating device is further improved.

1. The name of the design product: Thermostat (oxygen humidification liquid). 2. The use of the design product: For medical clinical and home oxygen therapy, adjust the temperature of the oxygen humidification liquid, and maintain the constant temperature of the humidification liquid, ensure that the patient inhales warm and humid gas. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The utility model provides a smoke purifying device, and belongs to the field of air purifying equipment. The technical problem of how to quickly exhaust indoor smoke is solved. The smoke purifying device comprises a shell and an air exhaust mechanism, the shell is provided with a main air suction opening and a main air outlet, the air exhaust mechanism is communicated with the main air outlet, the main air suction opening is located below the shell, and a first auxiliary smoke purifying structure and a second auxiliary smoke purifying structure are arranged on the left side and the right side of the shell respectively. The first auxiliary smoke purification structure and the second auxiliary smoke purification structure are oppositely arranged, a conveying structure capable of conveying gas sucked into the auxiliary smoke purification structures into the shell is connected between the first auxiliary smoke purification structure and the shell and between the second auxiliary smoke purification structure and the shell, and the first auxiliary smoke purification structure, the second auxiliary smoke purification structure and the main exhaust inlet can suck air at the same time. The main air suction opening and the auxiliary smoke purification structure can suck air at the same time, the speed of sucking smoke and other gas by the smoke purification device is increased, indoor air circulation is kept, and harm caused by the smoke is reduced.

The utility model discloses a dust filtering device which comprises a connector, the right end of the connector is communicated with a fixed cover, and when an air tank connected to a breathing mask is replaced by the device due to insufficient air pressure in the air tank in the fire rescue process, the fixed cover is fixed through a water absorption sponge, a reciprocating screw rod, a sliding block, an extrusion plate, a limiting block and a humidity sensor. In the process that breathing traction gas is subjected to dust filtering through the filter element, external dust mixed with water vapor is firstly subjected to water absorption and dehumidification through the water absorption sponge, at the moment, the sucked gas is firstly subjected to dehumidification through the water absorption sponge, and then when the humidity sensor detects that the humidity of the dehumidified gas is large, the motor is started to drive the reciprocating lead screw to rotate; furthermore, under the limiting of a limiting block, a sliding block is controlled to drive an extrusion plate to reciprocate to extrude out water adsorbed in the water absorption sponge, the water absorption effect of the water absorption sponge and the dust filtering effect of the filter element are guaranteed, and the situation that the firefighter inhales gas with large water vapor for a long time, and consequently the respiratory mucosa is damaged is avoided.