76results about How to "Unable to work properly" patented technology

The invention provides a method of obtaining information of articles stored in a refrigerator and the refrigerator. The method of obtaining the information of articles stored in the refrigerator comprises the following steps of: shooting the pull-out process and push-in process of a target article storage drawer of the refrigerator by using a shooting device as to obtain a first image collection and a second image collection; respectively processing the first image collection and the second image collection so as to obtain a first stored article image and a second stored article image which reflect the conditions of articles stored in the target article storage drawer before and after the target article storage drawer is operated; and comparing the first stored article image and the second stored article image, and determining the change of articles in the target article storage drawer according to the difference between the first stored article image and the second stored article image. The method has the beneficial effects that after the target article storage drawer is operated by a user, the change information of articles in the target article storage drawer is determined by processing and comparing the images before and after the target article storage drawer is operated, so that the refrigerator is relatively intelligent and humanized, thereby enabling the relatively specific information of the stored articles to be conveniently obtained by the user, and improving the usage experience of the user.

The invention discloses a refrigerator control method and system with a linear compressor. The control method comprises the steps that the temperature T of the environment where a refrigerator is located is monitored; the environment temperature T and the preset environment temperature threshold value T0 are compared; if T is larger than T0, the refrigerator is made to run under the first work condition by controlling a refrigerating and / or heating assembly in the refrigerator; if T is smaller than or equal to T0, the refrigerator is made to run under the second work condition by controlling the refrigerating and / or heating assembly in the refrigerator; and when the linear compressor runs within a preset time, the refrigerating amount of the linear compressor under the second work condition is controlled to be larger than the refrigerating amount of the linear compressor under the first work condition, and a chamber of the refrigerator reaches the target temperature. The running work conditions of the linear compressor are controlled by the refrigerating and / or heating assembly in the refrigerator so as to increase the stroke of a piston in the linear compressor, and it is avoided that due to the fact that the linear compressor is protected by a frequency conversion plate, the refrigerator cannot work normally.

The invention discloses a repair method for a display panel and the display panel. A display area and a peripheral area are formed on the display panel, the display panel comprises a first substrate and a second substrate disposed in a box-to-box mode with the first substrate; the peripheral area includes a fan-out area located between the edge of the second substrate and the edge of the display area; the first substrate is provided with multiple fan-out lines communicated with the display area and the peripheral area in the fan-out area and multiple auxiliary lines corresponding to the fan-out lines one to one; each auxiliary line at least includes one opening part protruding outward, the auxiliary lines of the opening parts are not overlapped with the corresponding fan-out lines, and atleast one auxiliary line and the corresponding fan-out line are disconnected at one end. According to the repair method and the display panel, the disconnected or short-circuited fan-out lines can berepaired so that signals can be transmitted through the auxiliary lines, the situation that normal work of the display panel cannot be conducted because of the disconnection of the fan-out lines is avoided, and the yield of the display panel is increased.

The invention belongs to the technical field of printing machines, and particularly provides a printing machine roller. The printing machine roller comprises a vertical supporting frame, a rotating pipe, an outer casing pipe, an inner driving pipe, an extrusion plate, a fixed rod, a rubber pipe and a rubber thin film, the inner wall of the outer casing pipe is provided with the inner driving pipein an attaching manner, the rubber thin film is mounted between the outer casing pipe and the inner driving pipe, micro holes are formed in the outer casing pipe and the inner driving pipe, a strip clamping block is fixedly mounted on the inner wall of the outer casing pipe and is clamped in a strip-shaped clamping groove in the outer edge of the inner driving pipe, the rubber pipe is fixedly bonded on the inner wall of the inner driving pipe, arc grooves are evenly formed in the outer edge of the rubber pipe, and communicate with the micro holes in the inner driving pipe, in the work processof a printing machine, the extrusion plate extrudes the rubber pipe on the inner side of the non work face of the outer casing pipe all the time, when the outer casing pipe rotates to the position ofthe non work face, the micro holes in the surface of the outer casing pipe are cleaned, and the micro holes of the outer casing pipe can be subjected to cleaning while the printing machine works.

The invention provides a method for producing a pixel electrode. The method includes the following steps that a substrate is provided, a grid electrode, a source electrode, a drain electrode and a passivation layer are formed on the substrate, a contact hole is formed in the passivation layer so that the drain electrode can be exposed from the contact hole, coating of a nano-metallic material is performed to form a conducting layer to cover the passivation layer and the drain electrode which is exposed from the contact hole, and patterning of the conducting layer is performed to form the pixel electrode.

The invention provides a connector coupling a first electronic device and a second electronic device with a power source such that the power source supplies the current to the first electronic device and the second electronic device. The connector includes a first connector assembly, a second connector assembly, a third connector assembly, a power source wire coupled with the first connector assembly, the second connector assembly and the third connector assembly, a first data line, and a signal switching circuit which is configured to detect whether the third connector assembly is coupled with the power source, the first connector assembly is coupled with the second connector assembly when detecting that the third connector assembly is not coupled with the power source, and when detecting that the third connector assembly is coupled with the power source, the first connector assembly is controlled for being coupled with the third connector assembly, a power connection message is transmitted to the first electronic device through the first data line, or the second connector assembly is controlled for being coupled with the third connector assembly, and the power connection message is transmitted to the second electronic device through the first data line.

The invention provides an electronic steering column lock control circuit and a control method thereof. The control circuit comprises a main MCU connected with a power supply circuit used for supplying power to an electronic steering column lock and diagnosing power supply, an auxiliary MCU connected with a ground supply circuit used for supplying ground to the electronic steering column lock and connected with a ground supply diagnosis circuit used for diagnosing ground supply, and a power feedback circuit used for controlling the output of the ground supply circuit according to whole vehicle power state feedback. By the adoption of the embodiment, the main MCU and the auxiliary MCU are arranged, so that power supply and ground supply of the ESCL are controlled, and safety is improved; the power feedback circuit is additionally arranged, so that it is guaranteed that the ESCL cannot normally work in a non-OFF power state, and it is guaranteed that the ESCL cannot be mistakenly triggered to be locked even under the condition that procedures of the main MCU and the auxiliary MCU run mistakenly; and in addition, the diagnosis circuit is arranged for power supply and ground supply, and power and ground cannot be output when it is diagnosed that a fault occurs.

The invention discloses an ultralow temperature vacuum insulation quick connector and a production method thereof. The connector comprises a pull rod, a vacuum cavity, a first outer pipe, a second outer pipe, a third outer pipe, a piston rod, a first oil orifice, a cylinder and the like. The pull rod is integrated with a jaw. The pull rod can be connected with a piston pin through a connecting shaft. The vacuum cavity is located among the first outer pipe, the second outer pipe, the third outer pipe and an inner corrugated pipe. The first oil orifice is located at the front end of the cylinder. A second oil orifice is located at the rear of the cylinder. The cylinder is connected with the piston rod. A vacuum opening is connected with the third outer pipe and communicated with the vacuum cavity. A counter flange and a connecting flange are welded with two ends of the inner corrugated pipe respectively. A support ring is located in the vacuum cavity between the inner corrugated pipe and the third outer pipe. A guide plate and a guide rod are welded to an annular rotator and fixed on the first outer pipe. By the ultralow temperature vacuum insulation quick connector, fast and safe connection and separation of a pipeline or a loading arm with a tank-truck or a LNG (liquefied natural gas) ship during ultralow-temperature liquid loading and unloading are achieved.

The invention relates to an oil balance system of a reciprocating oil separation diaphragm pump hydraulic end, in particular to the oil balance system of the reciprocating oil separation diaphragm pump which is suitable for delivering a high temperature and high pressure slurry with solid grains. The oil balance system comprises a cylinder body, a diaphragm, a deflation valve which is arranged on the upper end of the cylinder body and an oil supplementary valve which is arranged at the lower end of the cylinder body, and an oil separation tank. The oil balance system is characterized in that the oil separation diaphragm structure is adopted and the deflation system cooperates with the oil supplementary system so as to control the oil level in the separation tank to change within a safe range. The oil balance system of the invention has the beneficial effects of sensitive response, effectively controlling the oil level of the separation tank in the safe range when the oil supplementary pump supplements oil, preventing over-high or over-low oil level which causes the pump not to run normally, reducing the working temperature of the diaphragm and prolonging the service life of the diaphragm.

The invention provides a wind power generator set. The wind power generator set includes a bearing system, a fixing shaft and a hub, wherein the bearing system includes an outer bearing ring and an inner bearing ring; the fixing shaft is connected with the inner bearing ring; and the hub is connected with the outer bearing ring. The wind power generator set is characterized in that the wind powergenerator set further comprises an air cooling system; the air cooling system includes an air outlet pipeline; the air outlet pipeline is located in the radial direction of the inner bearing ring; andthe air outlet pipeline can be rotatable around the center point position of the inner bearing ring. Air pipelines are used in the wind power generator set to circumferentially eject inner bearing rings by 360 degrees; bearing temperature and circumferential temperature gradient are effectively controlled; coolant is not needed; the process is simple; because the air is sucked from the outside, abearing is cooled while the inner cavity of the hub generates air convection; heat dissipation is enhanced; the abnormal operation of the internal electrical equipment due to excessive temperature isavoided; and at the same time, the wind power generator set also features cabin ventilation to save an additional cabin ventilation device.

The invention discloses a compressor foot and a compression provided with the same. The compressor foot is mounted on a base of the compressor. The compressor foot comprises a connecting part and a supporting part, wherein the connecting part is connected to the base, the supporting part is connected to the connecting part to support the connecting part, and the hardness of the connecting part is greater than that of the supporting part. According to the compressor foot provided by the embodiment of the invention, the compressor foot is composed of two parts which are different in hardness. By selecting a material which is relatively small in hardness to prepare the supporting part, vibration transfer of the compressor can be reduced, so that a buffering and vibration-reducing effect can be achieved; by selecting a material which is relatively large in hardness to prepare the connecting part, an effect of connecting the base of the compressor and the supporting part can be exerted, and the phenomenon that the compressor cannot work normally as the base of the compressor abrades the connecting part in a use or transport process of the compressor is prevented.

The present invention discloses an aerosol atomizer capable of preventing tar leakage and repeated tar injection. The aerosol atomizer comprises: a shell (1), wherein a tar storage bin (13) is arranged in the shell (1), and a first clamping hole (14), a second clamping hole (15) and a third clamping hole (16) are sequentially formed in the side wall of the shell (1) from upstream to downstream; afirst pipe body (3), wherein an atomizing core (32) and tar guide cotton (33) are arranged in the first pipe body (3); a rubber plug (4) and a base (2), wherein at the first position, a tar inlet hole (31) is sealed by the rubber plug (4), at the second position, the tar inlet hole (31) is exposed in the tar storage bin (13), and the tar guide cotton (33) sucks tobacco tar from the tar storage bin (13) through the tar inlet hole (31), so that the problem of leakage of the tobacco tar in the tar guide cotton (33) in the transportation process is avoided. The electronic cigarette further prevents the problems that tobacco tar is manually injected into the tar storage bin again, and aerosol condensate formed by aerosol generated by heating the tobacco tar damages the electronic cigarette.

The invention provides a connector that couples a first electronic device and a second electronic device with a power supply such that the power supply supplies current to the first electronic deviceand the second electronic device. The connector comprises a first connector component for coupling the first electronic device, a power supply connector component for coupling a power supply, power lines for coupling the second electronic device and the first connector component to the power supply connector component, a data line, a power supply state detection circuit which is coupled to the power supply connector component and is set to detect whether the power supply connector component is coupled to the power supply, and a message transmission line, wherein one end of the data line is coupled to the second electronic device, the other end of the data line is coupled to the first electronic device, one end of the message transmission line is coupled to the power supply state detectioncircuit, the other end of the message transmission line is coupled to the second electronic device, and the power supply state detection circuit is set to send a power supply connection message to thesecond electronic device via the message transmission line when a condition that the power supply connector component is coupled to the power supply is detected.

The invention discloses a screw thread rolling machine easy to clean. The screw thread rolling machine easy to clean comprises a base; a screw plate groove is formed on the top wall of the base; a movable screw plate is slidably mounted in the screw plate groove; a fixed screw plate is fixedly mounted on the top wall of the base on the back side of the screw plate groove; a transfer box body is fixedly mounted on the top wall of the base on the left side of the fixed screw plate; an opening of the transfer box body faces forwards; a transmission device for controlling an unprocessed screw to move is arranged on the transfer box body; a discharging groove with a rightward opening is formed on the top wall of the base on the back side of the screw plate groove; a screw cleaning device is arranged in the discharging groove and comprises a swing shaft rotatably mounted on the discharging groove; and limiting sliding grooves are formed on the swing shaft in a bilaterally symmetrical manner.

The invention discloses an aerosol atomizer capable of preventing tar leakage during transportation, which comprises a shell (1), a first pipe body (3), a rubber plug (4), and a base (2). A tar injection hole (12) is formed in the downstream of the shell (1) and is communicated with a tar storage bin (13) in the shell (1). A flue gas channel (11) is arranged in the downstream of the shell (1). Thefirst pipe body (3) is located in the shell (1), a tar inlet hole (31) is formed in the side wall of the first pipe body (3), and an atomizing core (32) and tar guide cotton (33) are arranged in thefirst pipe body (3). During transportation, the base (2) and the first pipe body (3) are both located at a first position, and at the moment, the tar inlet hole (31) is sealed through the rubber plug(3). During use, the first pipe body (3) is pushed by the base (2) to move downstream to a second position, and when the first pipe body (3) is located at the second position, the tar inlet hole (31)is exposed in the tar storage bin (13), and the tar guide cotton (33) can suck tobacco tar from the tar storage bin (13). Therefore, the problem that the tobacco tar in the tar guide cotton (33) leaksin the transportation process is avoided.

The invention discloses a network security camera device. The network security camera device comprises a camera device main body, a telescopic sleeve rod and a solar collector plate, one end of the camera device main body is fixedly connected with a telescopic sleeve rod; one side of the camera device main body is fixedly connected with a solar collector plate; the top of the camera device main body is fixedly connected with a protective top cover; the other end of the camera device main body is fixedly connected with a tail bracket; the interior of the protective top cover is fixedly connected with a cushioning spring; the top of the protective top cover is fixedly connected with an arc-shaped surface; the bottom of the protective top cover is fixedly connected with a mounting frame; themounting frame improves the working efficiency of workers; the solar collector plate improves the environmental protection property of the device main body, the infrared compensation lamp improves thepracticability of the device main body, the spherical camera enlarges the shooting range of the camera, and the camera protection mechanism plays a role in protecting the camera, is suitable for network security camera shooting, and has a wide development prospect in the future.

The invention relates to an energy-saving and emission-reducing garbage incinerator with a washing and drying structure. The energy-saving and emission-reducing garbage incinerator comprises a body, acleaning pipe, drying fans and an alkaline reagent box. Lifting air rods are mounted above the body, and the upper portions of the lifting air rods are connected with a water tank. The body and the lifting air rods are movably connected, and the lifting air rods and the water tank are in screw connection. The cleaning pipe is fixed to the center position of the bottom of the water tank, and an electromotor is arranged on the left side of the bottom of the cleaning pipe. The cleaning pipe and the electromotor are in screw connection. A spraying head is connected with the lower portion of the leaning pipe, a transmission gear rack is arranged at the top of the spraying head, and the cleaning pipe and the spraying head are movably connected. The energy-saving and emission-reducing garbage incinerator with the washing and drying structure has the beneficial effects that the transmission gear rack and the electromotor are arranged, water can be sprayed by 360 degrees along with rotation ofthe spraying head, and therefore the device cleaning efficiency is improved.

The invention belongs to the technical field of water pump impellers, and particularly relates to a water pump impeller. The water pump impeller comprises a bottom disc, arc-shaped limiting sliding grooves and annular storage grooves, wherein the arc-shaped limiting sliding grooves are evenly formed in the edge of the upper surface of the bottom disc; arc-shaped blades are slidably arranged insidethe arc-shaped limiting sliding grooves; a lower rotating ring is arranged at the outer side of a mounting hole in the center of the bottom disc in a sleeving mode; the edge of the lower rotating ring is fixedly connected with one ends of the arc-shaped blades through pull ropes; movable limiting plates are fixedly arranged at the ends, close to the lower rotating ring, of the arc-shaped blades;the movable limiting plates are fixedly connected with fixed limiting plates through springs; and the fixed limiting plates are fixedly connected to the inner sides of the ends of the sides, close tothe lower rotating ring, of the arc-shaped limiting sliding grooves. According to the water pump impeller, the arc-shaped blades are arranged inside the arc-shaped limiting sliding grooves, the lengths, extending out of the arc-shaped limiting sliding grooves, of the arc-shaped blades can be changed in the mode that the pull ropes are wound around the lower rotating ring, and the overall size of the impeller can be changed, so that the impeller is suitable for water pumps with different sizes.

The invention discloses a slow cooker. The slow cooker comprises a cooker shell with a power line, and the cooker shell is provided with a control switch and a cooker cavity and is of an integrated structure formed through plastic in an injection molding mode. A thermal insulation ring is arranged at the upper edge of the cooker cavity and provided with a cooker aluminum inner container. A PTC heater is installed at the bottom of the cooker aluminum inner container, is provided with a heat dissipation device in a matched mode and is electrically connected with the power line. Heat dissipation holes are formed in the bottom of the cooker shell. A cooker pottery inner container is arranged in the cooker aluminum inner container, a supporting edge on the cooker pottery inner container and the upper edge of the cooker aluminum inner container are supported by each other, a heating chamber covering the cooker pottery inner container is arranged between the outer peripheral face and bottom wall of the cooker pottery inner container and the inner peripheral face and upper bottom face of the cooker aluminum inner container, air serves as the heat transfer medium in the heating chamber, and an opening of the cooker pottery inner container is provided with a cooker cover matched with the cooker pottery inner container. Because the cooker shell is of the integrated structure formed through the plastic in the injection molding mode and the PTC heater is adopted for constant-temperature heating, the slow cooker has the advantages of being light, handy, beautiful, convenient to use and safe and achieving constant-temperature heating.

The invention discloses an anti-tar-leakage aerosol atomizer which comprises a shell (1), a first pipe body (3), a rubber plug (4), and a base (2). A tar storage bin (13) is formed in the shell (1). Afirst clamping hole (14) and a second clamping hole (15) are formed in the side wall of the shell (1), and the second clamping hole (15) is located at the downstream of the first clamping hole (14).The first pipe body (3) is located in the shell (1) and internally provided with an atomization core (32) and tar guide cotton (33). At a first position, a tar inlet hole (31) is sealed by the rubberplug (4), and the base (2) pushes the first pipe body (3) to move downstream to reach a second position. At the second position, the tar inlet hole (31) is exposed in the tar storage bin (13), and thetar guide cotton (33) sucks tobacco tar from the tar storage bin (13) through the tar inlet hole (31). Therefore, the problem that the tobacco tar in the tar guide cotton (33) leaks in the transportation process is avoided.

The invention discloses a novel power equipment box. The power equipment box structurally comprises a box cover, a control button and a box body, one side of the box cover is hinged with the front surface of the box body, and the back surface of the control button is movably clamped with the front surface of the box cover. According to the invention, replacement devices are arranged at the bottomsof power connecting poles. When one of the connecting poles in the series-connected power equipment box is broken and pulled out, and pressure plates can be combined by boost rings, so that internalconductive wires can be reconnected, and the remaining power connecting poles can work normally. At the same time, the temperature inside the box can be automatically monitored at any time. When the temperature is too high, a cooler is automatically started to cool the interior of the box body, and the situation that internal electronic elements are damaged and cannot work normally due to high temperature generated by work or the external environment is avoided.

The invention discloses an integrated control device suitable for a thermal centrifugal comprehensive test. The integrated control device comprises a centrifugal machine, a temperature control systemand a thermal centrifugal comprehensive monitoring system, wherein the centrifugal machine is provided with collector rings; the temperature control system comprises a temperature sensor, a temperature controller and a heating module; the heating module is arranged at the arm end of the centrifugal machine, and a temperature holding hood is arranged on the outer side of the heating module; the temperature sensor and the heating module are connected with the temperature controller; and the temperature controller and the centrifugal machine are connected with the thermal centrifugal comprehensive monitoring system through the collector rings. In thermal-centrifugal test equipment, the integrated control device realizes multiple temperature zone control based on product temperature response in a centrifugal field environment, and realizes more accurate temperature control. Due to the cooperative work of the temperature control system and a centrifugal control system, data interaction is realized, and test load is loaded.

In order to solve the problem of low power generation efficiency of a photovoltaic panel caused by rain, snow and dust coverage, the invention provides an automatic cleaning system for a photovoltaic panel and a control method thereof, and the automatic cleaning system comprises a water supply module, a cleaning module and a control module, the water supply module is composed of a rainwater collection module, a condensate water collection module, a hot water collection module and a water storage tank which are independently arranged, the rainwater collection module, the condensate water collection module and the hot water collection module are connected with a water inlet of the water storage tank, and a water outlet of the water storage tank is connected with the cleaning module. The control module is connected with the rainwater collection module, the condensate water collection module, the hot water collection module and a pump body on the water storage tank, and the control module can control water supply and cleaning work according to a set cleaning period and the upper and lower limit liquid levels of the water storage tank.

The invention discloses a wood chip treatment device for wood cutting. The wood chip treatment device comprises a cutting platform, a rack and a cutting blade, wherein a residue suction opening penetrating through the cutting platform is formed in the cutting platform at one side, close to the feeding end, of the cutting blade; a collecting cover covering the cutting blade and the residue suction opening is arranged below the cutting platform; and a chip separating box is arranged at the bottom of the collecting cover, the chip separating box comprises a box body, a chip separating cylinder arranged in the box body and communicated with the collecting cover and a rotating cylinder arranged in the chip separating cylinder and partially extending out of the chip separating cylinder, the box body is connected with a powdered chip treatment device, and the chip separating cylinder is connected with a coarse chip treatment device. According to the wood chip treatment device, through the arrangement of the chip separating cylinder, wood chip dust generated during wood cutting can be separated into coarse chips and powdered chips through the chip separating cylinder, so that classified recycling is facilitated, potential safety hazards caused by scattering and stacking of wood chips during wood cutting and damage to respiratory health of workers caused by drifting of the powdered chips are avoided; and meanwhile, the wood chips are recycled in a classified manner, so that recycling of the wood chips is greatly facilitated.

The invention relates to the technical field of electrical equipment, in particular to a dustproof and moisture-proof power distribution cabinet. An electrostatic dust removing cover is arranged to effectively prevent dust in the air from entering the power distribution cabinet. A moisture-proof layer is arranged, so that the interior of the power distribution cabinet can be kept dry. The power distribution cabinet incapable of working normally due to the influence of dust and moisture can be prevented. A door lock is arranged on the cabinet door, and the door lock is located in the middle ofthe right end of the cabinet door. The electrostatic dust removing cover is composed of a cover body and a magnet, and the magnet is arranged at the right end of the cover body. The hinge is fixed onthe cabinet body and is located at the left end of the cabinet body. The cabinet door is installed on the hinge, and the cabinet door is movably connected with the hinge. An exhaust fan is installed on the right side of the cabinet body and is located at the upper end of the cabinet body. The electrostatic dust removing cover is installed inside the right side of the cabinet body and corresponds to the position of the exhaust fan. The moisture-proof layer is arranged on the cabinet body and is located at the lower end of the cabinet body. A base is installed on the moisture-proof layer and located at the lower end of the moisture-proof layer.

The invention discloses a wiring harness box convenient to insert. The wiring harness box comprises a wiring harness box body; the right side surface of the wiring harness box body is connected with one end of a first connection wiring harness; furthermore, a first groove is formed in the left side surface of the wiring harness box body; a plurality of wiring columns are arranged on the right sidesurface of the inner wall of the first groove; and furthermore, the plurality of wiring columns respectively correspond to a plurality of connection plugs arranged on the right side surface of a connector. According to the wiring harness box convenient to insert disclosed by the invention, due to arrangement of the wiring harness box body, the first connection wiring harness, the first groove, the wiring columns, the connector, the connection plugs, a second connection wiring harness, a first clamping rod, a clamping groove, a second groove, a through hole, a fixing device and a third groove,a second clamping rod passes through the through hole, and is clamped into the second groove, so that the first clamping rod is fixed; therefore, the connection plugs and the wiring columns cannot beloosened when being connected together; and thus, the problem that a machine cannot normally work due to the fact that the connection plugs and the wiring columns are contacted poorly or separated can be avoided.

The invention discloses a plasma fire extinguishing apparatus, which consists of a shell and an internal circuit, wherein the internal circuit comprises a sensor, a central processing and analyzing circuit, a voltage control circuit, an external control circuit and a plasma generator; the sensor detects environmental conditions comprising temperature, air pressure and wind power and transmits data to the central processing analysis circuit; the central processing and analyzing circuit processes and analyzes the data, and sends an instruction; the voltage control circuit receive the instruction and adjusts the voltage of the plasma generator, or an operator adjusts the voltage of the plasma generator according to personal judgment; the plasma generator performs preionization on gas by a radio frequency preionization method, and performs discharge breakdown on the gas subjected to preionization by a method of stopping discharge through a medium to form plasma airflow so as to act on flames, so that the fire is safely, cleanly and efficiently extinguished; meanwhile, an aim of flexibly controlling the plasma generator to generate proper plasma airflow to improve the fire extinguishing efficiency is fulfilled.