38results about How to "Avoid overheating and burning out" patented technology

The invention discloses a heating device, in particular a liquid heating device which is suitable for and can be effectively applied in various household electrical appliances, such as coffee machines, espresso machines, instant hot water machines, tea machines, dishwashers or similar kettle appliances. The liquid heating device is characterized by comprising an outer tube body, a heating tube, a plurality of spiral lines, an input tube and an output tube, wherein the heating tube is arranged in the outer tube body for heating with current to produce heat, the spiral lines are arranged between the outer tube body and the heating tube for guiding water flow and preventing deformation of the heating tube, the input tube and the output tube are respectively arranged at two ends of the outer tube body, wherein the spiral lines are regularly arranged at intervals and are wound on the heating tube. A small amount of water can be heated rapidly, and the liquid heating device has the advantages of high heating efficiency, simple structure, low cost, high yield, energy conservation, water conservation and safe use.

The invention provides a low-voltage distribution box with a heat radiating system in the technical field of low-voltage distribution boxes. The low-voltage distribution box comprises a distribution box body. The left and right sides of the bottom of the distribution box body are each equipped with a roller. The bottom of the distribution box body is provided with heat radiating holes. The left and right sides of the distribution box body are each equipped with a cooling liquid box body. The left and right sides of the cavity of the distribution box body are each equipped with a cooling cavity. Fins are arranged on the outer wall of each cooling cavity. The bottom of each cooling cavity is connected with a water inlet pipe, and the other end of the water inlet pipe is connected to the bottom of the corresponding cooling liquid box body. A circulation pump is arranged at the bottom of the cavity of each cooling liquid box body. The low-voltage distribution box has a simple structure, and is easy to use. The box body is cooled using an eddy current fan and cooling liquid, so the heat radiating effect is good, the components in the low-voltage distribution box are prevented from being overheated and burned out, the dual cooling effect is good, and the service life and working efficiency of the components are improved.

The invention discloses a two-stage heat absorber. The two-stage heat absorber comprises a cavity, wherein the cavity is divided into a low-temperature heat absorbing area and a high-temperature heat absorbing area, the high-temperature heat absorbing area is cylindrical, one end of the high-temperature heat absorbing area is open, a working medium outlet is formed in the bottom end of the cavity, the low-temperature heat absorbing area is of a circular truncated cone structure, an interlayer channel is formed in the inner wall of the cavity, an air working medium passes through the interlayer channel, an air working medium inlet is formed in the portion, located on the edge of the circular truncated cone structure, of the interlayer channel, the working medium enters the interlayer channel where the working medium flows through the working medium inlet, absorbs low-density solar energy flow on the edge of a light spot so as to be pre-heated after passing through the low-temperature heat absorbing area, absorbs the high-density solar energy flow in the center of the light spot so as to be in the high-temperature state after entering the high-temperature heat absorbing area and finally flows out of the heat absorber through the working medium outlet, and thus light-heat conversion is completed. According to the two-stage heat absorber, the density Gaussian distribution characteristic of the solar energy flow of the light spot is fully considered, the heat absorber is divided into the low-temperature heat absorbing area and the high-temperature heat absorbing area, in this way, radiant heat loss of the heat absorber can be reduced, and the heat efficiency of the heat absorber is improved.

The invention relates to a negative resistance temperature coefficient zinc oxide linear resistance ceramic material and a preparation method, which belong to the technical field of functional ceramic material manufacture. The negative resistance temperature coefficient zinc oxide linear resistance ceramic material is characterized by comprising, by mole percentage, zinc oxide 90%-95%, magnesium oxide 1.0%-3.0%, aluminum oxide 3.0%-5.0% and metasilicic acid 1.0%-3.0%. By adjusting reasonable proportion of functional additives and adopting the negative resistance temperature coefficient zinc oxide linear resistance ceramic material prepared by a high energy grinding preparation technology, products have excellent comprehensive performance, the optimal nonlinearity coefficient can reach 1.0, the dielectric property can be stable in a high frequency region, the dielectric constant is in a range of 0.6*104-1*104, the resistivity is 40-50 ohm / centimeter, the temperature resistance coefficient is in a range from -3.7*10-3 to -3.6*10-3 ohm / DEG C.

The invention discloses an efficient paint surface repair system and a repair method. The system comprises a bottom plate and a repair cover, wherein a rotary table is arranged on the bottom plate, three carrying plates are evenly arranged on the rotary table, clamping pieces used for mounting workpieces are arranged on the carrying plates, the repair cover is provided with a spray gun, a heating plate and a grinding head, the spray gun, the heating plate and the grinding head correspond to the three carrying plates respectively in position, and a heat conduction block and a heat conduction adjusting plate are arranged between the carrying plates corresponding to the spray gun and the heating plate. The efficient paint surface repair system can continuously conduct grinding, spraying and thermocuring treatment on batch workpieces and has high repair efficiency. According to the repair method of the system, deposited paint powder is preheated and cured, so that a coating composed of a plurality of individual coatings is formed on the surface of a workpiece, the gas content in a film is reduced, the obtained coating has high density, and the paint surface quality is good.

The invention discloses a pipe orifice machining device. The pipe orifice machining device comprises a rotary cutter, wherein the rotary cutter comprises a main cutter body, one end of the main cutterbody is provided with a cutter handle so as to be connected with a driving device, and the driving device drives the main cutter body to rotate. A plurality of working rotors are arranged at the other end of the main cutter body around the rotation center of the main cutter body, and the working rotors are circumferentially and uniformly distributed. The working rotors comprise guiding portions and forming portions disposed above the guiding portions. A machining method of applying the pipe orifice machining device is to drive the main cutter body to rotate and move relative to pipe orificesto be machined so that the pipe orifices to be machined is guided by the guiding portions into the forming portions, the forming portions presses the pipe orifices for pipe shrinking or flanging; andmeanwhile, when the working rotors rotate along the rotation center of the main cutter body under the driving of the main cutter body, due to extrusion friction between the surfaces of the working rotors and the outer side walls of the pipe orifices, the working rotors rotate relative to the main cutter body and roll on the outer walls of the pipe orifices so as to prevent heat generated by dynamic friction, and the pipe orifices are prevented from overheating and burning out.

The invention provides a DC power supply micro-current starting circuit, comprising a current-limiting circuit, an energy storage circuit and a negative resistance switch. The current-limiting circuitlimits the current of a high-voltage DC power supply to obtain a micro current. The energy storage circuit stores the micro current. The negative resistance switch is switched on when the voltage inthe energy storage circuit reaches a set value, and is switched off when the current flowing through the negative resistance switch is lower than the holding current of the negative resistance switch.The DC power supply micro-current starting circuit which is formed by connecting the current-limiting resistor, the energy storage capacitor and the negative resistance switch in series, is simple instructure, uses fewer components, and generates loss only when a DC power converter is started.

The invention relates to a protection tool using a power protection transmission line, in particular to a device for preventing a conductor from dancing and producing damage to an iron tower. The device comprises a sleeve fixedly connected with a lifting lug I, a pressure plate arranged at one end of the sleeve, a creepage extending skirt arranged around the sleeve, a permanent magnet arranged onthe inner wall of the sleeve, a pull rod sleeved in the sleeve and fixedly connected with a lifting lug II and a coil arranged on the pull rod, wherein the coil cuts magnetic force lines in the permanent magnet, and eddy current is produced in the coil so as to produce heat. The generation of the eddy current blocks the relative motion of the conductor connected with the device, and plays a role in consuming the kinetic energy of the conductor.

The invention discloses a garden waste incineration boiler. The garden waste incineration boiler comprises a hearth, a steel frame, a fire grate, a feeding system, a horizontal flue and a tail flue. The back of the hearth is sequentially provided with the horizontal flue and the tail flue which are arranged to be in an n shape. An ash hopper and a backdraft pipe are arranged on the lower portion of the horizontal flue. The fire grate is a reverse chain fire grate. Baffles are arranged on the upper portion of the last row of tube bundles of a middle-temperature superheater, and clearances are reserved among the baffles. The feeding system is arranged in front of the hearth and comprises a garden waste bin, a standby stock bin, conveying devices, air supplying devices and a feeding hopper. The feeding system can be uniformly arranged to be in a multi-line parallel mode according to the width of the fire grate. The feeding hopper is divided into an upper layer and a lower layer, the upper layer is a garden waste hopper body, the lower layer is a standby fuel hopper body, and the independent air supplying devices are arranged on the garden waste hopper body and the standby fuel hopper body correspondingly. According to the garden waste incineration boiler, garden waste can be efficiently processed, and the feeding system can be flexibly and conveniently adjusted according to the change conditions of the garden waste so that continuous operation of the boiler can be ensured.

The invention discloses a two-stage heat-absorbing solar heat absorber, which comprises a cavity, the cavity is divided into a low-temperature heat-absorbing area and a high-temperature heat-absorbing area, the high-temperature heat-absorbing area is cylindrical with one end open, and the bottom of the cavity is There is a working medium outlet; the low-temperature heat absorption area is a truncated conical structure; the inner wall of the cavity is provided with an interlayer channel for the air working medium to pass through, and the interlayer channel is located at the edge of the truncated conical structure. The gas entrance enters the interlayer channel where the working fluid flows, passes through the low-temperature heat absorption area, and the low-density solar flow at the edge of the absorption spot is preheated to heat up, and then enters the high-temperature heat absorption area, where the high-density solar flow in the center of the absorption spot reaches a high temperature state, and finally passes through the working fluid The outlet flows out of the heat absorber to complete the light-to-heat conversion. The invention fully considers the Gaussian distribution characteristics of the spot solar flux density, and divides the heat absorber into a low-temperature heat absorption area and a high-temperature heat absorption area, which is beneficial to reducing the radiation heat dissipation loss of the heat absorber and improving the thermal efficiency of the heat absorber.

The invention relates to a low drop-out overcurrent protection circuit with controllable output. The overcurrent protection circuit comprises a main path, an auxiliary path, a reverse voltage protection circuit, a main and auxiliary path overcurrent switching and enabling inhibit control circuit, an efficiency adjustment resistor, an overcurrent sampling resistor and a limited current setting circuit; the overcurrent protection circuit has the functions of automatic overcurrent protection and output enabling / forbidding, is connected to a power entrance of a circuit in series, and can realize the functions of single event latchup resistance of satellite-bone equipment components and short circuit overcurrent protection of the circuit, thus having high practical value. The special application specific integrated circuit (ASIC) chip customized according to the low drop-out overcurrent protection circuit with controllable output well meets the application demands of satellite-bone equipment of a spacecraft and is beneficial to improvement of the equipment integration level; furthermore, the circuit overcurrent protection also has very strong universality for circuits besides the spacecraft.

The invention discloses a sensor for a built-in protection type automobile expansion tank, which includes a housing, a temperature sensor is screwed to the rear end of the left inner wall of the housing, and the left side of the temperature sensor extends out of the left side wall of the housing. The rear end of the right inner wall of the housing is equipped with a bimetal that is in contact with the front terminal of the temperature sensor. The right inner wall of the housing is located on the front side of the bimetal and has a first contact installed. A partition is installed in the middle of the cavity, and a second contact is installed in the middle of the left and right ends of the front side of the partition. The center of the front end of the left and right inner walls of the housing is connected to a rotating shaft through bearing rotation, and the outer wall of the rotating shaft is on the right. The sides are fitted with rectangular plates. The built-in protective car expansion water tank sensor not only has the function of prompting the driver that the temperature sensor is damaged and the engine temperature is too high, but also can detect and remind the water tank leakage to prevent the engine from overheating and damage.

The invention discloses a two-in-one oil field heating furnace with a high-pressure descaling system and relates to an oil field heating furnace. An existing oil field heating furnace has the problems that descaling is serious, a furnace must be shut down for treatment of descaling work, the treatment time is long, and the working efficiency of the oil field heating furnace is affected. A fire cylinder is arranged in a heating furnace body of the two-in-one oil field heating furnace. Multiple descaling devices are sequentially arranged on the fire cylinder in the length direction of the fire cylinder. A high-pressure pump is arranged outside the heating furnace body and communicates with all the descaling devices in the heating furnace body through a pipeline assembly. A control system is arranged outside the heating furnace body and is connected with all the descaling devices in the heating furnace body through a circuit assembly. A power source is located outside the heating furnace body and is connected with the control system. Multiple nozzles are evenly distributed on the inner wall of each water spraying ring, and the water spraying ends of the nozzles face the fire cylinder. A control valve is arranged on each water spraying ring and connected with all the corresponding nozzles. The two-in-one oil field heating furnace is used for separating crude oil.

The invention discloses a non-sputtering precise paint spraying method and a paint spraying system, wherein the paint spraying method comprises the following steps: S1: electrifying the paint powder and the workpiece, keeping the charged type of the paint opposite to the charged type of the workpiece; S2: spraying the paint powder The workpiece is painted; S3: while the paint is being painted, the paint powder deposited on the paint surface is preheated and solidified to form an orderly coating on the surface of the workpiece; S4: after the final coating is completed, the main Curing treatment, through heat conduction, the total curing heat is used for preheating the coating. The non-sputtering precision painting method in the present invention preheats and solidifies the deposited paint powder, so that the surface of the workpiece forms a coating composed of multiple single coatings. layer, reducing the gas content in the film, so that the obtained coating has high density and good surface quality. The non-sputtering precision spraying system can implement the above method. The system has a compact structure and high working efficiency.

The invention provides a stalling time-delay method used for a new energy automobile permanent magnet synchronous drive motor, comprising the steps of: determining whether a permanent magnet synchronous motor (PMSM) is in a stalling state; dividing position signals in a period into twelve areas; calculating an MTPA control angle; the adjustment amount of the control angle being 40% of the difference between a current position angle and a smallest position angle in an area, and multiplying a ratio parameter based on a current frequency; obtaining a stalling control angle under a stalling state; and determining whether the motor is still in the stalling state at the moment, continuing a stalling time-delay strategy if the motor is still in the stalling state and stopping stalling control if the motor is not still in the stalling state. the method can avoid the overheating of one phase in a stalling process under the condition of essentially not reducing the size of a stalling torque, thereby prolonging stalling time.

A vertical industrial silicon waste heat boiler with a pre-membrane water-cooled wall supplementary combustion furnace, which belongs to the technical field of industrial silicon waste heat boiler utilization equipment. Economizer, etc.; the methanol burner is set on the side wall of the supplementary combustion furnace and above the smoke inlet, and the explosion-proof door is located above the supplementary combustion furnace; one end of the downcomer is connected to the drum, and the other end passes through the inlet header of the evaporator It is connected with the membrane-type wall header located at the bottom of the supplementary combustion furnace, one end of the outlet pipe is connected with the drum, and the other end is respectively connected with the evaporator outlet header and the membrane-type wall header. There is a smoke outlet on the side of the lower part, and one end of the water guide pipe is connected to the drum, and the other end is connected to the economizer. The waste heat boiler of the present invention has the advantages of good sealing performance, reduced smoke temperature at the inlet of the superheater, avoiding overheating and burning out of the superheater when the boiler is started, shortening the start-up time, and improving the safety of the boiler.

Provided is a wiring circuit of a wall fan motor. The device comprises a synchronous motor, a control switch, a multi-gear speed adjustment switch, a live wire end, a zero wire end, a capacitive motor, a first closed wiring terminal, a second closed wiring terminal and a third closed wiring terminal, characterized in that it is characterized in that it comprises, multi-gear static switching contacts of the multi-gear speed adjustment switch are sequentially and correspondingly connected to a plurality of input ends of the capacitive motor. The input end of the multi-gear speed adjustment switch is connected to the live wire end; one end of the synchronous motor is sequentially connected to the control switch and a synchronous motor connecting contact of the multi-gear speed adjustment switch through a first closed wiring terminal; the other end of the synchronous motor is connected to the input end of a thermal fuse of the capacitive motor through a second closed wiring terminal, and the output end of the thermal fuse of the capacitive motor is connected to the zero line end through a third closed wiring terminal. By changing the wiring mode of the synchronous motor and optimizingthe wiring circuit of the wall fan motor, in actual production, the number of sheaths can be reduced, wiring is simple, and the production efficiency is improved.

The invention discloses a safe computer mainboard. The mainboard comprises a hard brush circuit board. The hard brush circuit board is provided with a central processor, a GPS module, a temperature sensor, a cooling fan, a memory and an Ethernet PHY module. A GPS antenna is arranged on the GPS module. The GPS module is connected with the central processing unit; wherein the temperature sensor andthe cooling fan are connected with an I / O interface of the central processing unit, the memory is connected with a storage end of the central processing unit, an Ethernet PHY module is connected witha GMII interface of the central processing unit, the end part of the hard brush circuit board is provided with a connector, and the surface of the hard brush circuit board is provided with an anti-corrosion protection layer. Design is reasonable, the GPS module is arranged. Positioning can be conducted. Serious economic losses caused by losing are avoided, and use is safe. Service life is long and the anti-corrosion effect is good.

The invention discloses a flexible fabricated induction heater which comprises an induction coil formed by several flexible cables in a tandem connection mode. Two ends of each flexible cable are both connected with a first connector and a second connector adaptive to the first connector respectively, mechanically and electrically. The first connector of each later flexible cable is connected with the second connector of a former flexible cable connected with the later flexible cable mechanically, electrically and separably. The flexible fabricated induction heater avoids excessive winding of the cables, and is easy and rapid to install, and suitable for heating large and small workpieces.

The invention discloses a hydrogen controller, comprising: a hydrogen controller shell, a control circuit board and a heat dissipation base. The structure of the hydrogen controller shell includes: an upper shell and a lower shell are fixed by a locking assembly, The groove and the resting platform of the lower case form a first accommodating chamber, the front end of the upper case and the accommodating notch of the lower case form a second accommodating chamber, and a first lower seal is arranged on the groove wall of the accommodating notch. Ring slot, the upper surface of the lower shell is provided with a second lower sealing ring slot, the first lower sealing ring slot is connected with the second lower sealing ring slot to form a continuous lower sealing ring slot, the lower sealing ring A lower sealing ring is provided in the ring clamping groove, an upper sealing ring clamping groove is provided on the upper surface of the lower housing, and an upper sealing ring is provided in the upper sealing ring clamping groove. When the upper housing and the lower housing are fixed, the upper housing and the lower housing are fixed. The lower casing will squeeze the upper sealing ring and the lower sealing ring to realize the waterproof sealing of the hydrogen controller casing. The invention has the advantages of good waterproof effect, strong heat dissipation performance and convenient assembly.