212results about How to "Avoid open flames" patented technology

The invention discloses an electronic cigarette and a heating device. The heating device of the electronic cigarette includes a base body, a heating part, an electrode and a temperature measuring part, wherein the base body is used for bearing parts, the heating part is arranged on the base body, the electrode is arranged on the base body and is used for connecting a power supply with the heatingpart, and the temperature measuring part is arranged on the base body and is used for monitoring the working temperature of the heating part in real time and feeding back monitor results to a controldevice. According to the heating device of the electronic cigarette, the heating part, the electrode and the temperature measuring part are arranged on the base body, and the electrode is used for connecting the power supply with the heating part, so that the heating part achieves a heating function; the temperature measuring part can monitor the working temperature of the heating part in real time and feeding back the monitor results to the control device, so that monitoring and controlling over the working temperature are achieved, open fire caused by the overhigh working temperature of theheating part is avoided, and the usage safety is improved.

The invention discloses an electronic smoking device based on a health management control technology. The electronic smoking device comprises a cigarette accommodating position for fixedly accommodating a cigarette, a heating coil arranged below the cigarette accommodating position and connected with a battery as well as a tar filtering device arranged above the cigarette accommodating position and connected with a cigarette suction nozzle part, wherein the cigarette accommodating position and the heating coil are fixedly placed in a cavity of a sealed box provided with a detachable cover, and the tar filtering device is arranged on a smoking nozzle. The electronic smoking device can realize automatic ignition electronically and automatic extinguishment when smoking is stopped, the smoking cost is low, and besides, smoking is relatively healthy.

The invention discloses an air supply pipeline for inspiration. An opening in the internal hole direction of the air supply pipeline is formed in a pipe wall of the air supply pipeline; the pipe wallis made of rigid materials; the parts, on the two sides of the opening, of the pipe wall are separated by a distance; the part, on one side of the opening, of the pipe wall is fixedly connected with asealing strip; and the other side of the sealing strip is movably connected with the part, on the other side of the opening, of the pipe wall.

The invention discloses a convection current radiation heated flue-cured tobacco type electronic cigarette. The convection current radiation heated flue-cured tobacco type electronic cigarette comprises a heater main body and a gas guide sleeve; the heater main body is provided with an accommodation cavity and a heating part facing the accommodation cavity for heating; the gas guide sleeve is detachably installed in the accommodation cavity; the gas guide sleeve is provided with a tobacco placing cavity and an internal forced gas guide needle tubing located in the tobacco placing cavity; a first breathing hole penetrating through a convection current gap and the tobacco placing cavity is formed in the bottom of the tobacco placing cavity; the internal forced gas guide needle tubing is provided with a gas guide cavity, and several second breathing holes penetrating through the gas guide cavity and a cigarette accommodation gap are formed in the side wall of the internal forced gas guideneedle tubing; the bottom of the gas guide cavity is communicated with the convection current gap. In this way, the convection current radiation heated flue-cured tobacco type electronic cigarette achieves a tobacco flue-curing mode of convection current heating, direct contact of the heating part and tobacco is avoided, omnibearing dead-angle-free heating is achieved, so that heating is fuller and more uniform, and the situations that naked light occurs to tobacco shreds when local temperature is too high, and the mouthfeel is influenced and the tobacco shreds are wasted when the local temperature is relatively low are avoided.

The invention relates to an asphalt spraying and conveying device with a cleaning function. The asphalt spraying and conveying device comprises a hot asphalt box (1), an asphalt delivery stop valve (3), an asphalt pump (4), an asphalt spraying stop valve (5), an asphalt sprayer (6), an oil return stop valve (8), a diesel oil tank (11) and a diesel oil stop valve (13), wherein the asphalt pump (4), the oil return stop valve (8), a first oil return pipe (7), a second oil return pipe (9), a first three-way pipe (10), a second three-way pipe (14) and a third three-way pipe (15) form a diesel oil cleaning circulation pipeline system; and the diesel oil tank (11) is connected with the third three-way pipe (15) through a diesel oil conveying pipe (12). The asphalt spraying and conveying device can conveniently clean residual asphalt in the asphalt pump, so that the cleaned asphalt pump is always in a state capable of freely starting and cannot be frozen by cooled asphalt; and unsafe operation, such as flame baking and the like, is avoided. The asphalt spraying and conveying device is low in using cost.

The invention discloses an electromagnetic induction heating device for internal mixer rotor surface overlaying preheating. The electromagnetic induction heating device comprises a rotor to be welded,a plurality of electromagnetic induction heating device bodies are mounted in the rotor to be welded through stand bars and annularly distributed in the rotor to be welded at equal intervals, and a left claw disc and a right claw disc are mounted at the two ends of each electromagnetic induction heating device body respectively through clamping claws, and protection pipelines are arranged in themiddles of the right claw discs in the axial direction. The heating speed is high, the efficiency is high, the induction heating efficiency is 60% higher than that of flames and 45% higher than that of resistance heating, the heating speed is 2-3 times of resistance heating speed, the metal burn-out rate is low, and the heating cost is low; due to the fact that the efficiency and the speed are high, higher cost advantages are achieved under the condition of mass long-term use, and automatic control can be easily achieved; closed-loop control is adopted, and induction heating can be automatically controlled precisely in real time according to the current state of a heated workpiece.

The invention discloses a composite glass fiber waterproof breathable membrane and a preparation method thereof. The composite glass fiber waterproof breathable membrane is of a three-layer structure and comprises a first glass fiber cloth layer which is 0.03-0.4mm in thickness, a thermoplastic polyurethane waterproof breathable layer of which the effective thickness is 0.05-0.3mm, and a second protecting layer which is 0.03-0.4mm in thickness, wherein the three layers are composited through a thermal combination process. As the glass fiber cloth has the characteristic of noncombustiblity and the thermoplastic polyurethane has the characteristics of difficulty in combustion, the membrane is conspicuous in fireproof effect when the front side is baked with fire, and due to improvement of the formula of the middle layer, the fireproof property is further improved, the open fire can be prevented within short time, and certain fireproof property is achieved.

The invention provides a building. The building is provided with gas supply pipelines. The gas supply pipelines are provided with gas outlets at appropriate positions of floors. Gas inlets of the gas supply pipelines extend to the outer side of the building and are communicated with gas outside the building.

The invention discloses a steel thin-wall wire-passing tube and the fittings thereof, which has the advantages of good sealing performance, convenient construction, low production cost, high performance price ratio, security and reliability. The wire-passing tube utilizes stainless steel thin-wall tube, the front port is tightly jacketed with a first embedded connecting soft plastic protecting jacket, a stainless steel thin-wall flexible joint is tightly jacketed into the first embedded connecting soft plastic protecting jacket and the wire-passing front port, and the screw outside the stainless steel thin-wall flexible joint is tightly jacketed with a second embedded connecting soft plastic protecting jacket. The invention can be widely applied to wire-passing tube for power cable of electrical equipment and illuminating cable for industry and citizen etc., arranged by light wire as well as by wall-buried or ground-buried wire.

The invention discloses a gas supply pipeline. According to the technical scheme, the pipe wall of the gas supply pipeline is provided with a linear opening in the extending direction of the gas supply pipeline, the pipe walls on the two sides of the opening are separated and are away from each other by a certain distance or the pipe walls on the two sides of the opening are closed and can be opened, all or part of the pipe wall is made of an elastic material, the opening of the gas supply pipeline can simultaneously allow a plurality of people to be close for sucking the air directly throughmouths or sucking the air by inserting a vent pipe into the opening, after the vent pipe is inserted into the gas supply pipeline, the pipe wall of the part, on the side edge of the opening, of the gas supply pipeline or a sealing component connected with the pipe wall of the part, on the side edge of the opening, of the gas supply pipeline can be wrapped around the vent pipe, and the vent pipe can move in the extending direction of the gas supply pipeline in the opening.

The invention provides an air supply pipeline. The pipe wall of the air supply pipeline is provided with an opening in the length direction of the pipeline, the two sides of the opening are correspondingly connected and provided with a chain belt I and a chain belt II, chain teeth I are arranged on one side edge of the chain belt I, chain teeth II are arranged on one side edge of the chain belt II, a ventilation sliding block device is arranged at the joint between the chain belt I and the chain belt II, the ventilation sliding block device structurally comprises guide ports formed in the twoends, a bottom plate, a cover plate and an inner core body, and the bottom plate is connected with the cover plate through the inner core body. According to the air supply pipeline, the parts, on theouter sides of the guide ports of the ventilation sliding block device, of the chain teeth I of the chain belt I and the chain teeth II of the chain belt II are in an engaged state, the parts, locatedin the ventilation sliding block device, of the chain teeth I and the chain teeth II are disengaged by the inner core body, and air outlet holes are formed in the part, located inside the air supplypipeline, of the bottom plate or the cover plate of the ventilation sliding block device.

The invention relates to the technical field of electric spark machine tools, in particular to an electric spark machine tool capable of effectively avoiding damage caused by electric sparks. The electric spark machine tool comprises a box body, a first liquid storage box is arranged on the rear side of the box body, a first self-priming pump is arranged at the top of the first liquid storage box, a refrigeration box and a machining groove are arranged at the top of the box body, and a snakelike pipeline is arranged in the refrigeration box. The first self-priming pump is connected with the input end of the snakelike pipeline through a first liquid feeding pipe, the output end of the snakelike pipeline is connected with an immersion liquid input pipe, and a machining table is arranged in the middle of the bottom of the inner wall of the machining groove. According to the electric spark machine tool capable of effectively avoiding damage caused by electric sparks, machining liquid output by the first liquid storage box is cooled through the refrigeration box, and the machining liquid in the first liquid storage box is continuously output, so that the machining liquid in the machining groove is in a flowing state, and high temperature is avoided. Electric sparks generated when the electric spark machine tool works can be extinguished through a second self-priming pump, a second liquid storage tank, a connecting pipe, a gooseneck pipe and an atomizing nozzle, and generation of open fire is avoided.

The invention discloses a socket and spigot telescopic type closing joint device. The socket and spigot telescopic type closing joint device comprises a socket tube, a socket tube connecting ring, a socket end head ring, a spigot tube, a spigot tube connecting ring, an outer reinforcing ring, an inner reinforcing ring and a plurality of limiting screws, wherein the socket tube connecting ring anda socket ring are fixedly arranged on the tube hole in the outer end of the socket tube; the spigot tube connecting ring and a spigot ring are fixedly arranged on the tube hole in the outer end of thespigot tube separately; the inner reinforcing ring and a spigot part are fixedly arranged on the tube hole in the inner end of the spigot tube separately; the tube hole in the inner end of the spigottube is inserted into the tube hole in the inner end of the spigot tube; a plurality of screw holes are separately formed in the spigot tube connecting ring and the outer reinforcing ring; and the two ends of each limiting screw are fixedly arranged in the screw holes of the socket tube connecting ring and the outer reinforcing ring though limiting nuts separately. The socket and spigot telescopic type closing joint device is wide in range of application, and can avoid electric-welding open fire, reduces a safety accident and saves first-aid repair time in first-aid construction of water conveying buried pipelines, oil conveying buried pipelines and gas conveying buried pipelines.

The invention provides an anti-smog handrail. The anti-smog handrail employs an air supply pipeline. The pipe wall of the air supply pipeline is provided with an opening along the length direction ofthe pipeline; both sides of the opening are respectively connected to a chain belt I and a chain belt II; one side edge of the chain belt I is provided with arrayed chain teeth I; one side edge of thechain belt II is provided with arrayed chain teeth II; a ventilation sliding block device is disposed on a joint between the chain belt I and the chain belt II; the ventilation sliding block device can slide on the chain belt I and the chain belt II; the structure of the ventilation sliding block device includes two guiding mouths, a bottom plate, a cover plate and inner core bodies; the bottom plate is connected to the cover plate through the inner core bodies; a gap is disposed between the bottom plate and the cover plate; in the outer sides of the guiding mouths of the ventilation slidingblock device, the chain teeth I of the chain belt I are meshed with the chain teeth II of the chain belt II; the chain teeth I and the chain teeth II located inside the ventilation sliding block device are opened by the inner core bodies; and the bottom plate or the cover plate of the ventilation sliding block device inside the air supply pipeline is provided with an air outlet hole.

Provided is a building. The building is provided with an air supply pipeline. The pipe wall of the air supply pipeline is provided with a line-shaped opening, and is all or partially made of an elastic material. The pipe walls on the two sides of the opening are separated and spaced by a distance, or the pipe walls on the two sides of the opening can be separated and opened, or the opening is closed and can be opened. The pipe walls are connected with magnetic sealing bars or connected with sealing bars with ferromagnetism. The sealing bar seals the openings through magnetic attraction, and the air supply pipeline can provide air meeting the breathing demand.

The invention relates to an electronic cigarette. The electronic cigarette comprises a shell, a microwave cavity, a heating module and a smoke channel, wherein the microwave cavity is arranged insidethe shell, and is used for storing a smoke forming substrate, and the substrate comprises a solid tobacco material; the heating module is arranged inside the shell, and comprises a microwave generatorused for generating microwaves, and an output device connected with the microwave generator and used for outputting the microwaves, and the output device is arranged inside the microwave cavity, so that the substrate is heated to form smoke; and the smoke channel is arranged inside the shell, communicates the microwave cavity and the outside space of the shell, and is used for exhausting the smoke out of the shell. The microwave cavity is arranged inside the shell, so that the amount of one electronic cigarette is equal to that of a plurality of packs of common cigarettes, the carrying is convenient, and the appearance is attractive. The heating module is arranged inside the shell, so that open fire is avoided, thus the potential safety hazards of fire disasters are avoided, then the useis safer, meanwhile, the falling of cigarette ash is avoided, and thus the use is more sanitary; and microwave heating is adopted, so that the heating speed and uniformity are improved, the user experience is promoted, and the availability of the substrate is improved.

The invention provides a device for quickly collecting oil and gas leaked from an oil-gas storage tank, and relates to a leaked oil and gas collecting device. According to the technical scheme, the device comprises a magnet, a seal ring, a rubber skin, a guide tube and a valve, wherein the magnet and the storage tank attract each other; the rubber skin is equipped with the seal ring, and fixed on the storage tank by utilizing the magnetic force between the magnet and the storage tank; the guide tube is connected with the rubber skin; and the valve is mounted on the guide tube. The device has the beneficial effects of being simple to operate and low in maintenance cost; open flames can be avoided and the safety coefficient can be improved; the safe operation of an oil storage tank field is not influenced; the operation cost is reduced; and the oil and gas of the oil-gas storage tank can be effectively and quickly collected.

Provided is a gas supplying pipeline. The pipe wall of the gas supplying pipeline is provided with a linear opening in the hole direction of the gas supplying pipeline; the pipe wall is fully or partially made of an elastic material; and according to the opening, a plurality of persons can get close to the opening to directly inhale with the mouths at the same time, or gas passing pipes are used and are inserted into the opening for inhaling.

The invention discloses a ferroferric oxide copper-loaded nanoparticle as well as a preparation method and application thereof in preparation of a root retarding material. The ferroferric oxide copper-loaded nanoparticles refer to nanoparticles formed by loading reduced copper nanogrannules uniformly on the surfaces of ferroferric oxide nanospheres, wherein the weight ratio of ferroferric oxide to reduced copper in each nanoparticle is 1:(0.3-1.2). The method comprises the following steps: dispersing ferroferric oxide nanospheres in chloroform; sequentially adding a copper chloride solution, sodium citrate and hydrolyzed gelatin, performing stirring at a temperature of 40-50 DEG C for 2-4 h, performing washing, and performing magnetic attraction to separate products so as to obtain the ferroferric oxide copper-loaded nanoparticles. The root retarding effect of a root retarding agent product prepared by utilizing the ferroferric oxide copper-loaded nanoparticle as an additive is achieved by virtue of interference of copper ions on substances in plants and destruction to root cell membranes while the copper ions are in contact with root cells, taproot growth is inhibited, lateral root growth is promoted, and root retardance and puncture prevention effects are achieved.

The invention discloses an anti-radiation concrete shielding door and a construction technology thereof, and belongs to the field of anti-radiation doors. The anti-radiation concrete shielding door comprises a concrete pile, wherein a concrete wall body is fixedly mounted at the top end of the concrete pile, a center channel is formed in the middle of the concrete wall body, a sealing flange is arranged on one side of the center channel, the concrete wall body on the outer side of the sealing flange is provided with an annular concave cavity, the side wall of the concrete wall body is provided with eight filling ports, one side of the bearing plate block is provided with a clamping guide rod, one end of the clamping guide rod is provided with a fixed hinge block, the fixed hinge block is fixedly connected with the side wall of the bearing plate block, a movable hinge block is arranged at the other end of the clamping guide rod, and a clamping door and a butt joint door are arranged in the middle of the clamping guide rod. According to the anti-radiation concrete shielding door, the clamping door and the butt joint door are movably connected together in a butt joint mode through the clamping guide rod, the sealing performance in the shielding door is improved, and the situation that a human body is injured by radiation substances with high radioactivity is avoided.

The invention discloses a gas supply pipeline. According to the technical scheme, the pipe wall of the gas supply pipeline is provided with a linear opening in the direction of an internal hole of thegas supply pipeline, all or part of the pipe wall is made of an elastic material, the pipe wall at one side of the opening is fixedly connected with a sealing strip, the other side of the sealing strip is movably connected with the pipe wall at the other side of the opening, and the sealing strip can be moved to open the opening.

The invention discloses an air supply pipe. The pipe wall of the air supply pipe is provided with a linear opening, wherein the linear opening is formed in the extension direction of the air supply pipe. Pipe wall bodies at the two sides of the opening are closed to form a rupture gap and can be opened. The opening can contain multiple ventilating pipes at the same time and allow the ventilating pipes to move therein. When the air supply pipe is not subjected to external force, the pipe wall bodies at the two sides of the rupture gap are in the closed state, or the pipe wall bodies at the twosides of the rupture gap are in the staggered overlapping state. The pipe wall is wholly or partly made of an elastic material. The pipe wall body at one side of the opening is fixedly connected witha seal strip, and the other edge of the seal strip is movably overlapped with the pipe wall body at the other side of the opening. The seal strip can be moved to open the opening.

The invention provides an improved coating coiling device. Static electricity caused by friction of materials and rollers is removed, gasoline and methylbenzene are prevented from causing open fire and fire disaster is avoided. The device comprises a coating roller, a coiling active roller and a coiling passive roller; the materials are in contact with the coating roller in coiling process; and a static electricity remover is disposed at the front end of the passive roller.

The invention relates to an oscillating type oil pressure wet spraying machine. The oscillating type oil pressure wet spraying machine comprises a chassis and a power system which controls the chassis to walk. A discharge port is formed in the side wall on the upper portion of a stock bin; two horizontally formed material cylinder ports are formed in the side wall opposite to the discharge port; a material conveying pipe is arranged between the discharge port and the material cylinder ports; one end of the material conveying pipe is rotatably connected to the discharge port while the other end of the material conveying pipe is in butt joint to the two material cylinder ports in turn in the rotating process of the material conveying pipe; the material cylinder ports communicate with a material cylinder; a piston is arranged in the material cylinder, the piston is driven by a piston pump, so that a material is extracted from the material cylinder through one of the material cylinder ports and is sprayed through a spraying channel formed by the other material cylinder port, the material conveying pipe and the discharge port; a reciprocating power mechanism which controls the material conveying pipe to rotate is arranged on the outer wall of the stock bin, and the material conveying pipe can be in butt joint to the two material cylinder ports in turn by virtue of the reciprocating power mechanism; and the piston pump, an oil cylinder and a power system are driven by fuel oil. The oscillating type oil pressure wet spraying machine provided by the invention is high in safety and efficiency and solves the technical problems that an existing undermine operating wet spraying machine has potential safety hazards and is low in efficiency.

The invention discloses a large module MOV mounting assembly with explosion-proof and pressure-relief functions for an MOV chip. The MOV mounting assembly comprises a shell, a cover plate, a first limiting groove, a first limiting block, a first spring, a clamping block, a fixing block, a sleeve, a charging box, a second limiting groove, a jacking block, a second spring, a discharging hole, a material bag, a through hole, an insulating ring, a plug, a clamping block, a piezoresistor body, a pin, a pressure relief chamber, a connecting rod, a piston, a pressure relief hole, a through groove and a stop block. In comparison with the existingMOV mounting assembly, a replaceable flame-retardant device is designed, open fire generated by combustion of the piezoresistor can be prevented, fire hazards are reduced, a secondary pressure relief function is designed, pressure generated by high temperature can be safely released into the environment, and meanwhile sharp gas buzzing is generated at the pressure relief hole. As the plug-in piezoresistor mounting device, after the piezoresistor is damaged, the piezoresistor can be quickly replaced, and meanwhile, the shell can be repeatedly utilized.

The invention belongs to the related technical field of tunnel engineering, and particularly relates to a lining formwork trolley for an open-cut rectangular tunnel. The lining formwork trolley comprises a bottom frame, mounting frames are arranged above the outer side of the bottom frame, the outer side wall of each mounting frame is connected with a supporting frame, a lifting mechanism is arranged above the outer side of each supporting frame, a rotating mechanism is arranged on the outer side of each supporting frame, a reinforcing mechanism is connected to one end of the outer side of the rotating mechanism, a placing frame is arranged at the top end of the outer side of the lifting mechanism, and a workbench is arranged in front of the outer side of the placing frame. By means of the reinforcing mechanism, when the device is moved to a proper position through a guide rail, a second hydraulic cylinder on the outer side of the reinforcing mechanism drives a second hydraulic rod, a fixing frame and a fixing block to reinforce the device, adjacent devices need to be welded and fixed through a common reinforcing mechanism, mounting and dismounting are not easy, the mounting and reinforcing time of the device is shortened, and the labor intensity of workers is reduced.

The invention relates to a smoke-diffusing accessory (1) designed to function with a barbecue (2), the smoke-diffusing accessory (1) forming a container (5) that can contain smoke-generating materials, characterized in that the smoke-diffusing accessory (1) comprises a lid (6) which engages with the container (5) to form a closed enclosure, the lid (6) comprises calibrated holes (8) so as to regulate the supply of oxygen into the enclosure, and the smoke-diffusing accessory (1) comprises a suspension means for vertically suspending the smoke-diffusing accessory (1) in the barbecue (2) such that the calibrated holes (8) are oriented upwards.

The invention relates to a gas jet barbecue device and method based on temperature and humidity regulation and control. The barbecue device comprises a barbecue box body, a meat product suspension rotating frame, a humidification system, a gas jet circulation system and a control system. According to the device and method, a large number of jet nozzles are arranged, high-speed airflow is generatedunder the action of a motor and an impeller, a high convection heat exchange coefficient is achieved, rapid baking is achieved, the taste of meat products is improved, open fire is avoided, no smokeis generated in the barbecue process, and the barbecue products are safe and sanitary; the device and method are suitable for barbecue of whole sheep, beefsteak, suckling pigs, chickens, ducks, geese,various kebabs and the like; barbecue parameters can be accurately adjusted according to the types and sizes of the meat products and the dietary habits of diners; and meanwhile, the barbecue end point can be automatically judged, the barbecue process is finished, cleaning is convenient, and maintenance is convenient.

The invention discloses a steel-bonded reinforcement method for a grid structure and belongs to the technical field of building structure reinforcement. The steel-bonded reinforcement method for the grid structure solves the technical problems that in the prior art, open fire is needed for welding, sleeve welding type reinforcement enables a steel tube to generate obvious structural deformation, and a reinforcing portion and a raw rod piece cannot form cooperative work of an integrated structure. The steel-bonded reinforcement method for the grid structure comprises the following steps of S1,determining a to-be-reinforced rod piece in a grid frame as a raw rod piece; S2, obtaining the diameter d, the deflection-span ratio, the cracking degree and the rusting condition of the raw rod piece; S3, determining the value of the damage degree S of the to-be-reinforced rod piece according to the deflection-span ratio, the cracking degree and the rusting condition of the raw rod piece; S4, obtaining the stress ratio of the raw rod piece; S5, obtaining the length and thickness of an outer bonded steel tube according to the value of the damage degree S and the stress ratio of the rod piece;S6, symmetrically bonding the outer bonded steel tube meeting the requirements of the step S5 at the center of the raw rod piece. The steel-bonded reinforcement method for the grid structure is suitable for reinforcing the grid rod piece with a bend deformation defect.

The invention discloses a compressor. The compressor comprises a compressor body including an electrode connected to a lead, an electrode cover arranged on the compressor body to limit a sealed space with the compressor body; a sealing structure arranged between the electrode cover and the compressor body to prevent outside air from entering the sealed space, wherein the electrode is located in the sealed space. According to the compressor provided by the invention, the outside air can be effectively prevented from entering the sealed space by arranging the sealing structure between the electrode cover and the compressor body, and the electrode of the compressor is isolated from the outside air; when an electric arc is generated, open fire generated in the sealed space can be effectively prevented, so that the probability of resulting in a fire is reduced, the safety factor of the compressor is improved, and the quality of products is promoted.