2606results about How to "Avoid burns" patented technology

Systems for handling and/or dispensing hydrogen or a mixture of fuels containing hydrogen gas including refueling stations for hydrogen-powered vehicles. Pure hydrogen or various mixtures ratios of hydrogen and CNG may be dispensed. Hydrogen handling equipment may include a hydrogen generator, a pressurizing apparatus or compressor, pressure vessels, piping, valves, vent pipes, and/or a dispenser. Substantially vertical orientation of pressure vessels may reduce the amount of land required and facilitate installation in urban environments. Pressurization may take place before hydrogen generation to reduce the power required for pressurization. Safety features include enclosures and surrounding walls that lean away from the equipment. Any leaking hydrogen, fires, or explosions may be contained and/or directed upward, protecting human life and property. Systems may be shop assembled and certified.

A structure comprises a high thermally conductive case with a receiver space for a power module, a thermally conductive part being provided on the case to contact a heating component of the power module in the power supply to induct the heat by the heating component to the case and contact the exterior air through the outside surface of case to dissipate the heat; and a housing the inner surface of which directly contact and cover the outside of high thermally conductive case, a grid-formed structure being formed at most of the region of housing to prevent the heat from scalding the person who touches or takes the power supply. With the large heat dissipation area, the heat is transferred through the external air to increase the efficiency of heat dissipation, and further all power parts may operate in a lower temperature to increase the work efficiency of power supply.

The invention provides an integrated pressure cooker facilitating lid opening. The integrated pressure cooker comprises a cooker body, a cooker lid and a fastening part, the fastening part comprises amovable clamping part arranged on the cooker lid and a fastening part body located on the cooker body, the cooker lid is fastened on the cooker body through the fastening part and further comprises openable clamping tongs, by opening and closing the cooker lid, the cooker body is unlocked and locked, the cooker lid is provided with an unlocking button, a first conveying mechanism is arranged between the unlocking button and the clamping tongs, the unlocking button drives the clamping tongs to be opened through the first conveying mechanism, when the unlocking button is triggered to move froman initial position to a first position, the clamping tongs are opened, and the unlocking button continues to be triggered to move to a second position, the movable clamping part is separated from thefastening part body. By operating the unlocking button, the clamping tongs are opened and separated from the fastening part, the pressure cooker is opened by one motion of operating the button, the problem in the prior art that the pressure cooker is complex in lid opening is solved, and a user conveniently uses the integrated pressure cooker.

The invention discloses a pressure cooking appliance, which comprises a pot body, a pot cover, a locking component, an exhaust component and a control unit, wherein the locking component is used for locking the pot cover; the exhaust component is used for discharging steam in the pressure cooking appliance, so that the pressure in the pressure cooking appliance is adjusted; the control unit is connected to the exhaust component and the locking component; and the control unit is used for acquiring a cooking stopping command of a user, controlling the exhaust opening degree of the exhaust component to be gradually increased after acquiring the cooking stopping command and controlling the locking component to conduct unlocking when the pressure in the pressure cooking appliance is less than or equal to a preset pressure or the exhaust time of the exhaust component reaches a preset time so as to release locking between the pot body and the pot cover, so that the pressure in the pressure cooking appliance is slowly released and pressure relief safety is guaranteed. The invention also discloses a control method of the pressure cooking appliance.

The invention relates to double loop double pyrolysis incinerator and its using method. Its features are that drying apparatus is formed by horizontal rotary kiln drying device, steam separator, and fume reflux line; the feed port of the horizontal rotary kiln is connected with discharge port of the feeding device; its discharge port is connected with the feed port above secondary burning chamber. While running, part of high temperature fume of secondary burning chamber can enter the rotary kiln to process reverse drying preheat and pyrolysis for the garbage; cooled fume is inducted into the secondary burning chamber by secondary fan after dehydrating by steam separator. Compared with exiting technique, the invention has the advantages of continual heat transfer, fast gasification rate, full burning, processing domestic garbage without auxiliary fuel etc.

The invention belongs to the technical field of light source illuminating and electronics, in particular relates to an intelligent general light-emitting diode (LED) street lamp illuminating power supply system. The system comprises an input surge protection and electromagnetic interference suppressing circuit, a BOOST-BUCK isolation backlash power factor correction switch power circuit, an LED chip temperature detection circuit, an ambient brightness detection circuit, a permanent calendar chip, a peripheral circuit, an LED failure detection circuit, a singlechip circuit and a constant-current output control circuit. In the switch power circuit of the invention, a circuit structure is simplified and circuit efficiency is improved based on an active power factor correction (PFC) control chip L6562,; and the singlechip circuit monitors the ambient brightness, the temperature of the LED chip, time and LED fault in real time by taking a chip STC12C5606AD as a control core and intelligently adjusts the output brightness of the LED according to different situations, so that energy is saved and the service life of an LED street lamp is prolonged effectively at the same time.

The invention relates to a safe intelligent health preserving water cup. An annular energy-saving color LED indicator lamp is arranged on a cup rim of a cup body, a capacitance type liquid level meter is arranged in the cup body, a water level display LED lamp, a warning buzzer, a displayer and three function buttons of the displayer are arranged on the side face of the cup body, and the annular energy-saving color LED indicator lamp, the capacitance type liquid level meter, the water level display LED lamp, the warning buzzer, the displayer and the three function buttons of the displayer are respectively connected to a controller located on a module at the bottom of the cup. The water intake every day can be set, the schedule of the water intake every day can be visually seen, the function for conveniently reminding a water drinker of drinking water in time is achieved, the function for displaying current water temperature and the function of anti-scalding safety protection when water temperature is too high are achieved, the water level in the cup can be visually known through the water level LED lamp, the function of an ordinary electronic clock is achieved, and the safety functions of pathophoresis resistance and malicious poisoning resistance based on fingerprint identification are further achieved.

An air circulation system for use with or without ductwork having an outside air stream and a return air stream includes a controller and a return damper apparatus operatively connecting the return air stream to the controlled environment. The air circulation system further includes a heating unit and an air mass sensor disposed adjacent to the return damper apparatus. The air mass sensor selectively and directly detecting a ventilation rate of air moving through the return damper apparatus and communicates the ventilation rate to the controller which selectively modulates operation of the heating unit in dependence upon the ventilation rate.

A four-cycle engine is provided with valve timing adjusters for adjusting opening and closing timing an and an exhaust valve. In medium- to high-speed ranges in medium- to high-load regions of the engine, a closing point (ExC) of the exhaust valve defined as a point of transfer from an acceleration portion to a constant speed portion on its valve lift characteristics curve is set to a point a specific period before an intake top dead center, and an opening point (InO) of the intake valve defined as a point of transfer from a constant speed portion to an acceleration portion on its valve lift characteristics curve is set to a point after the intake top dead center. In addition, the period from the closing point (ExC) of the exhaust valve to the opening point (InO) of the intake valve is made longer in the medium-speed range than in the high-speed range in the medium- to high-load regions of the engine.

The invention relates to an electronic cigarette control method, an electronic cigarette control device and an electronic cigarette. The method comprises the following steps of when the electronic cigarette starts, detecting whether the resistance value of an atomizer is in the preset range or not; if so, obtaining the current current and the current voltage of the atomizer; performing calculation according to the current current and the current voltage to obtain the current output power of the atomizer; outputting a corresponding control signal to a power regulating circuit according to the current output power; regulating the output power of the atomizer by the power regulating circuit according to the control signal; returning to the step of obtaining the current current and current voltage of the atomizer. The regulation on the output power of the electronic cigarette can be realized, so that the burning of the atomizer of the electronic cigarette can be avoided; the service life of the atomizer is prolonged; the service life of the electronic cigarette is further prolonged.

The invention relates to a non-penetration laser welding apparatus. The non-penetration laser welding apparatus comprises a laser welding head (1), a transmitting optical fiber (2), a laser (3), a feedback control system (6), a computer (7) and an infrared temperature acquisition system (8); the non-penetration laser welding apparatus is characterized in that the laser light output by the laser (3) is transmitted to the laser welding head (1) by virtue of the optical fiber (2), a laser beam (4) focused by a focusing lens in the welding head acts on the surface of a welding material (5) to weld the material, the infrared temperature acquisition system (8) is used for capturing the temperature of the back surface of a weld joint in the welding process online, obtaining the present welding penetration condition of the material and transferring control information to the feedback control system (6), and the feedback control system (6) is used for controlling the laser (3) to adjust the power of the laser light in real time. The non-penetration laser welding apparatus is capable of performing accurate control on non-penetration welding adopted in industries so that the welded joint can be protected against non-fusion and back burn; the non-penetration laser welding apparatus is high in practicability.

The invention relates to the traditional medical field, particularly relating to the field of acupuncture in the traditional medicine and in particular to an acupunctural device and a control method for acupuncture air temperature. The invention adopts a shell that is opened on one side and an air delivery pipe that extends into the shell, wherein, an outlet end of the air delivery pipe extends near to an acupuncture point and delivers medicinal air to an acupuncture area. The invention also adopts at least one temperature sensor to detect the air temperature near the outlet end, a drive unit drives the outlet end of the air delivery pipe to move towards or away from the acupuncture point and a control unit is electrically connected with the temperature sensor and the drive unit respectively and controls actions of the drive unit (3) according to the detected temperature. The invention has the beneficial effect that the temperature of the medicinal air during moxibustion is automatically detected and regulated into a safe range, thus effectively preventing a sufferer from being burnt; and the air of the traditional Chinese medicine is discharged in a concentrated way, which does not spread out and influence the therapeutic environment.

The invention relates to an infrared induction temperature control e-cigarette and a temperature control method thereof. The infrared induction temperature control e-cigarette comprises a shell, a liquid storage device nested in the shell, an atomization component, a heating element R in the atomization component, a power supply and a circuit control panel with a smoking switch SW. The circuit control panel comprises an infrared temperature induction unit and a power supply management module. The infrared temperature induction unit can receive an infrared radiation signal which is sent from the heating element R and which represents a certain temperature, then converts the same into a temperature electric signal and sends the temperature electric signal to the power supply management module. After judgment and processing, the power supply management module generates a control electric signal to control the heating element R to be connected/disconnected with the power supply. According to the arrangement, with the infrared temperature induction unit, the temperature in an atomization chamber is detected and controlled, and the atomizer is protected from dry burn. Thus noxious gas and burnt flavor are prevented from entering human bodies, and human health is protected.

The invention relates to the field of display devices, in particular to an electrostatic discharge protection circuit, a display panel and a display device. According to the embodiment of the invention, the electrostatic discharge protection circuit comprises at least one electrostatic protection element, and the electrostatic protection element comprises a bottom gate electrode, a first insulating layer, an active layer, a second insulating layer, top gate electrodes, a third insulating layer, a first electrode and a second electrode, wherein the bottom gate electrode is positioned on a substrate; the first insulating layer is positioned on the bottom gate electrode; the active layer is positioned on the first insulating layer, and corresponds to the bottom gate electrode; the second insulating layer is positioned on the active layer; the top gate electrodes are positioned on the second insulating layer, and correspond to the active layer; the third insulating layer is positioned on the top gate electrodes; the first and second electrodes are positioned on the two sides of the top gate electrodes on the third insulating layer respectively; the bottom gate electrode and the top gate electrodes are electrically connected with the first electrode and connected with a power cord or a circuit of a display area of the display panel; and the second electrode is electrically connected with the circuit of the display area or the power cord. According to the electrostatic discharge protection circuit, an electrostatic discharge path is added, so that the anti-electrostatic capability is improved.

A power circuit of a vehicular electronic control unit is provided with a constant voltage power circuit, an awakening timer circuit, and first and second power supply circuits each of which is supplied with power from a vehicle battery. The constant voltage power circuit is supplied with power from the vehicle battery via the first and second power supply circuits. The awakening timer circuit generates an awakening trigger signal upon a lapse of a prescribed time from a stop of power supply to the microprocessor. The first power supply circuit has an output contact as a first opening/closing element and a coil for closing the output contact. The second power supply circuit has a second opening/closing element that is provided between the vehicle battery and the constant voltage power circuit and is closed at least in response to the awakening trigger signal.

The invention relates to the technical field of cutting and processing, and discloses a cutting device, which includes a base. Both sides of the top of the base are fixedly connected with fixed seats, and the top of the fixed seats are fixedly connected with lifting columns. A guide groove is opened on one side of the column, and the inside of the guide groove is movably connected with a first slider. The top of the lifting column is fixedly connected with a fixed column, and a servo motor is installed inside the fixed column. The output of the servo motor The shaft is fixedly connected with a first threaded rod, and the first threaded rod is located inside the lifting column. The cutting device collects the dust generated by cutting through the collection tank on the workbench, filters it through the leak plate, sprays water mist through the atomizing nozzle on one side of the collection tank, and makes the dust floating in the air fall through the second connecting pipe It enters the treatment tank, is filtered and purified by the purification layer, and enters the water tank through the outlet pipe for recycling, which saves energy and is easy to clean.

The invention discloses an electronic smoking tool capable of assisting in smoking. The electronic smoking tool capable of assisting in smoking comprises a shell, and a baking device, a battery and a circuit control device which are arranged in the shell; the baking device comprises a heating cup and a heat-insulating layer; the heating cup consists of a heating tube and a heating sheet arranged at the internal bottom of the heating tube; the heating tube and the heating sheet are electrically connected with the battery and the circuit control device correspondingly through positive and negative electrode leads, and can be heated after being electrified; the upper part of the heating tube is open and is used for inserting of a cigarette body; a bulge for upwards supporting the cigarette body is arranged at the bottom of the inner wall of the heating tube in the radial direction; the heat-insulating layer comprises a tubular heat-insulating sleeve arranged outside the heating tube in a sleeving way and a heat-insulating plate arranged at the bottom of the heat-insulating sleeve; and the circuit control device comprises a circuit control plate and a key switch exposed out of the shell. The electronic smoking tool capable of assisting in smoking has the beneficial effects that the heating sheet is provided and used for preheating the air to enable the temperature of the cigarette body to be increased uniformly and rapidly, and the bulge and a ventilating groove are formed in the inner wall of the heating tube, so that the whole cigarette body is heated uniformly, the generated smoke does not have scorched flavor and the smoke quantity is increased.

Cannabinoids have been found to have antioxidant properties, unrelated to NMDA receptor antagonism. This new found property makes the cannabinoids useful in the treatment and prophylaxis of wide variety of oxidation associated diseases, such as ischemic, age-related, inflammatory and autoimmune diseases. The cannabinoids are found to have particular application as neuroprotuctants, for example in limiting neurological damage following ischemic insults, such as stroke and trauma, or in the treatment of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease and HIV dementia. Nonpsychoactive cannabinoids, such as cannabidoil, are particularly advantageous to use because they avoid toxicity that is encountered with psychoactive cannabinoids at high doses useful in the method of the present invention. A particular disclosed class of cannabinoids useful as neuroprotective antioxidants is formula (I) wherein the R group is independently selected from the group consisting of H, CH3, and COCH3

The invention discloses a self-locking socket and plug based on capacitance change, relates to the technical field of electric power and the self-locking socket and plug comprises a socket body, conductive columns are fixedly connected to the inner bottom walls of the two sides of the socket body, first springs are fixedly connected to the inner bottom walls of the two sides of the socket body, movable blocks movably connected with the inner wall of the socket body are fixedly connected to the tops of the first springs, and dielectric plates are fixedly connected to the middles of the movableblocks. The invention discloses a self-locking socket and plug based on capacitance change. The electromagnetic device is matched with the clamping block for use; when the plug is plugged with the socket, the plug extrudes the movable block to the bottom of the socket; the bottom of the movable block is contacted with the top of the conductive column; when the plug is pulled out by mistake, a circuit of the electromagnetic device is connected, at the moment, the clamping block moves outwards under the magnetic repulsion effect of the electromagnetic device, the clamping block is clamped with the clamping groove, movement of the plug is limited, and therefore the mistaken pulling prevention effect is achieved, the equipment plug is effectively prevented from being pulled out in the workingstate, stable work of equipment is guaranteed, and equipment burnout is effectively prevented.

The present invention relates to a foot bath and fumigation chair, more specifically to a chair comprising: an upper plate installed at sitting height and comprising a round opening in the middle thereof; a frame supporting the upper plate horizontally and comprising a receiving space at the bottom thereof; a chair back installed on the upper plate and supporting the back of a user; and a drawer which moves forward or backward and is received into the receiving space, wherein a fumigation member is installed on the upper plate of the chair, and a foot bath member is installed in the drawer which moves forward or backward and is received into the receiving space, thereby enabling foot bath and fumigation simultaneously or selectively while a user is seated on the chair.

This invention relates to an ESD protection configuration and method for light emitting diodes (LED), including an LED an LED, having a p-n junction and connected to a circuit substrate, the circuit substrate having two p-type substrates and one n-type substrate therein; a first ESD protection configuration, built-in the circuit substrate and including a first resistor, a first capacitor and a first diode that are connected in series and then engage a parallel connection with the LED, wherein the first diode has a p-node connected to an n-node of the LED; and a second ESD protection configuration, built-in the circuit substrate and including a second resistor, a second capacitor and a second diode that are connected in series and then engage a parallel connection with the LED and the first ESD protection configuration, wherein the second diode has a p-node connected to the p-node of the LED, whereby such a configuration absorbs and removes ESD induced upon human contact and prevents the LED from burning to effectively extend the lifespan of the LED.

A spiral type fluid mixer which enables mixing by a distribution of concentration or distribution of temperature in a flow direction of the fluid made uniform without unevenness and which is compact and enables easy piping work is provided. This spiral type fluid mixer is provided with a fluid inlet, a first flow path which is connected to the fluid inlet, a first spiral flow path which is connected to the first flow path, a plurality of branch flow paths which are branched from the first spiral flow path, a second spiral flow path to which the plurality of branch flow paths are connected, a second flow path which is connected to the second spiral flow path, and a fluid outlet which is connected to the second flow path, the plurality of branch flow path being branched from different positions of the first spiral flow path and being connected with the second spiral flow path at different positions of the second spiral flow path.

The invention relates to a preparation method of a tunnel asphalt surface layer material. A preparation method for damping porous noise-reducing tunnel asphalt pavement material is characterized in that it comprises the following steps: 1) preparation of high-viscosity and high-elasticity modified asphalt: base asphalt according to the mass ratio of each component: modifier SBS : Activated rubber powder: Viscosifying compatibilizer: Antioxidant: Stabilizer=100: 6.0~18.3: 20.2~45.7: 1.2~3.7: 0.2~1.4: 0.4~1.9, select; obtain high viscosity and high elasticity modification Asphalt; 2) Add flame retardant to high-viscosity and high-elasticity modified asphalt, heat and melt high-viscosity and high-elasticity modified asphalt to add flame retardant, stir for 3-9 minutes, and stand at 150-170°C for 15-30 minutes to obtain Flame-retardant high-viscosity high-elasticity modified asphalt; 3) according to the mass ratio, mineral material: flame-retardant high-viscosity high-elasticity modified asphalt: fiber stabilizer = 100: 3.6~5.2: 0.1~0.4, choose; noise tunnel asphalt surface material. The invention has the functions of noise reduction, flame retardancy and anti-skid.

The invention discloses a food heating control method and a food heating device. The food heating control method comprises the steps that hyperspectral images of heated food is obtained through a hyperspectral recognition module; and the surface texture and color information of the heated food are judged based on the hyperspectral images, whether the cooking degree of the heated food reaches the set cooking degree or not is judged base on the surface texture and the color information, and if yes, heating of the heated food is controlled to be stopped. Information such as the type, the surfacetexture, the surface color and the surface temperature of the heated food is obtained based on analysis of a hyperspectral imaging technology, the cooking degree of the heated food is judged by combining the information, and intelligent food heating control is realized; and the temperature of the food is acquired without an adopting externally-arranged or internally-arranged temperature sensor, the cooking degree of the food is judged without relying on experiences of a cook, intelligent adjustment can be realized according to the property difference of the food heating device, the best cooking effect is achieved, and the technical problem that the control of the existing food heating cooking degree is very difficult is solved.

The invention relates to a cooling bypass structure of an electric control box for the outdoor unit of an inverter air conditioner. The structure includes a thickened control box faceplate and capillaries communicating the faceplate interior with a low temperature refrigerant pipe. A hollow cavity is formed between the front side and the back side of the thickened control box faceplate; skirt plates in up/down parallel arrangement are positioned in the hollow cavity of the faceplate, thereby forming rotary type up/down circulating passages. The upper part and the lower part of the control box faceplate are respectively connected with the capillaries, two capillaries are connected with the low temperature refrigerant pipe leading to an evaporator, and the hollow cavity of the control box faceplate communicates with the low temperature refrigerant pipe via the capillaries. When the air conditioner is in operation, the temperature of the control box is lowered by the low temperature refrigerant passing through the control box faceplate, so as to avoid fuse burnout and stoppage phenomena caused by over-high temperature of the electric control box. At the same time, the capillaries of the bypass structure can play the role of throttling decompression to the refrigerant system, thereby facilitating heat conversion of the refrigerant to the evaporator and optimizing the operation performance of the system.

The invention discloses a management system of a battery. The management system of the battery comprises a data acquisition device and an intelligent processing device, wherein the data acquisition device acquires real-time state parameters of the battery; and the intelligent processing device is positioned at a terminal, at least estimates SOC (state of charge) value and/or SOH (state of health)value of the battery according to the real-time state parameters and transmits the estimation value to a cloud platform. The invention also discloses a management system of the battery. An artificialintelligent model with relatively high precision is obtained by estimating the SOC and the SOH of the battery at the terminal, analyzing the estimation values by the cloud platform and training a neural network model, and the precision of the terminal model is improved by the training result, so that the use safety of the power battery can be greatly improved, warning is conducted in advance, combustion of the battery is avoided, the use value and the energy utilization efficiency of the power battery are greatly improved and powerful scientific basis is provided for normalizing the power battery product market.

The invention provides an aroma massage magnet therapy moxibustion rod which comprises a moxibustion head component, a connection component, a screw joint, an outer pipe, an inner pipe, a swath shrinking clamp component, a thrusting component, a push button and a sealing cover, wherein the moxibustion head component comprises a moxibustion head which is internally provided with a magnetic ring; the moxibustion head component and the connection component are magnetically connected, and the magnetic connection enables the moxibustion head component and the connection component to be simultaneously rolled and plugged; the connection component is connected with the upper part of the screw joint through threads; the lower part of the screw joint is connected with the upper end of the outer pipe through a thread; the swath shrinking clamp component and the thrusting component are tightly matched and connected; the push button passes through a vertical elongated push button slide way hole on the wall of the outer pipe and a vertical elongated push button slide way hole on the wall of the inner pipe and is connected with the thrusting component. The aroma massage magnet therapy moxibustion rod realizes safety, small size, simplicity, convenience and multiple functions, saves swaths and has inimitable advantages compared with the same products of the prior art.

The invention discloses a cutting type diaphragm gas meter and belongs to a gas meter. The cutting type diaphragm gas meter comprises a base meter body, wherein a gas inlet and a gas outlet are arranged on the base meter body; a cutting valve is mounted at the gas inlet; the gas meter further comprises a signal acquisition treating circuit and a cutting type diaphragm gas meter terminal microcomputer controller; the signal acquisition treating circuit is connected with the cutting type diaphragm gas meter terminal microcomputer controller; the cutting valve is connected with the cutting type diaphragm gas meter terminal microcomputer controller through a cutting valve control circuit; the signal acquisition treating circuit is used for acquiring the flow of fuel gas flowing by the base meter body in real time and timely transmitting to the cutting type diaphragm gas meter terminal microcomputer controller; and when the abnormal states, such as small flow leakage, abnormal mass flow and over long service time, of the output of the base meter body are detected, the cutting valve on the base meter body is timely turned off and a liquid crystal display screen and a buzzer are utilized to alarm, so that the burning or explosion phenomenon caused by excessive leakage of the fuel gas is avoided and the life and property of people are protected.

An electrically conductive connection is provided. The electrically conductive connection includes a gantry, rotatable about a pivot axis, and a stand. The connection comprising a wireless electrical contact, and at least one defined rotary position of the gantry. A radiation therapy system and method for operating a gantry of a radiation therapy system is also provided.

The invention provides a level offset unit, a level offset circuit and drive method, and a grid drive circuit, belonging to the display technology field. The level offset unit comprises a logic control module, an output module, an output control module and a feedback module, wherein the logic control module is connected to a start up power supply, a driving power supply, an input signal terminal and an output module; the feedback module is connected to an enabling signal terminal, a signal output terminal and an output control module; the output control module is connected to the output module and the driving power supply; and the output module is connected to the signal output terminal. The feedback module of the level offset unit controls the output module to start up and switch off through the enabling terminal and the signal input terminal. If the signals outputted by the two level offset units are short circuited, the feedback module controls the output control module of the level offset circuit to be disconnected, so that the output module outputs the high impedance so as to avoid the burning of the gate driver, which causes the potential safety hazard.