88results about How to "Contactless" patented technology

The invention relates to a steering system planetary gear absolute angle output corner sensor, mainly composed of a gear ring (1), a sun gear (3), planetary gears (7), a CPU control unit (11) and Hall sensors; wherein the sun gear is a magnetic gear, and the sun gear and the gear ring are all provided with a pair of magnetic poles; the sun gear is fixed on a steering column (9), and the steering column is fixedly connected with an auto steering wheel; the quantity of the planetary gears is three, the planetary gears are evenly distributed and fixedly arranged on a planet carrier (9) and are connected with the sun gear and the gear ring in a meshed way, and the planet carrier is fixed at the upper part of a sleeve; a pair of Hall sensors are respectively arranged near the sun gear and the magnetic poles of the gear ring, and each pair of Hall sensors are arranged in 90 degrees; and the Hall sensors are connected with the CPU control unit (11) by a data line. The invention has the advantages of low requirement on environment, high cost performance, wide measurement range, insensitivity to error caused by temperature and convenient installation.

The invention discloses a magnetic suspension universal momentum sphere device and a realizing method thereof. The magnetic suspension universal momentum sphere device comprises a momentum sphere, a position control electromagnetic system, a rotation control electromagnetic system, a sphere body state detection system and a central control system, wherein the momentum sphere is used for rotation, the position control electromagnetic system is used for generating a magnetic force in any direction for the momentum sphere, the rotation control electromagnetic system is used for generating a rotating torque capable of rotating towards any direction for the momentum sphere, the sphere body state detection system is used for detecting the operation state of the momentum sphere and the central control system is used for controlling the electromagnetic system and the sphere body state detection system and receiving operation state data of the momentum sphere, detected by the sphere body state detection system. The momentum sphere is adopted for replacing a momentum wheel, therefore the magnetic suspension universal momentum sphere device is capable of realizing rotation in any direction; the rotating torque enabling the sphere body to rotate is generated through a rotating magnetic field, therefore, the magnetic suspension universal momentum sphere device realizes non-contact, non-resistance and accurate rotation control; and the sphere body is magnetically suspended through the magnetic force, therefore the friction force is thoroughly eliminated.

The invention discloses a control and protection technology of a high-voltage direct current solid state power controller and is applied to an electromechanical control system and an airplane secondary power distribution system. Rigid lines are adopted to control turn-on and turn-off of the solid state power controller, and a communication bus is used for inquiring and controlling a running status of a direct-current load. The solid state power controller has the functions of capacitive load and short circuit judgment. The output end is provided with a fly-wheel diode and a safety protection circuit, and therefore the solid state power controller is enabled to have strong capacitive and inductive load capacity, and the output voltage is smaller than a safe voltage when the solid state power controller is powered off. The 270V high-voltage direct current solid state power controller adopts an enhancement type metallic-oxide-semiconductor field effect transistor (MOSFET) to form a power switch. The high-voltage direct current solid state power controller has the advantages of being short in turn-on and turn-off time, free from contact point, free from interference, high in reliability, long in service life and the like.

The invention relates to an alternating current direct driving technology of a light emitting diode (LED) light-emitting device. Specific to the defects of light emitting flicker caused by directly driving an LED light-emitting device by alternating current in the prior art, the invention discloses an LED light-emitting device directly driven by alternating current. An LED light-emitting device circuit is composed of n levels of LED modules in cascade connection, a sampling unit is used for properly presetting turn-off and switch-on voltages of each level of LED modules corresponding to a switch unit, and therefore flicker phenomenon caused in the process of alternating voltage fluctuation can be avoided. Increasing the number of the LED modules is equivalent to reducing break-over voltages of each level of LED modules, and a utilization rate of a power supply is improved. In the process of applying a plurality of levels of LED modules, when alternating voltages fluctuate, the effect of each LED module is smaller compared with the effect of applying a single module, working stability of an LED is better and reliable, and the capacity of alternating voltage fluctuation resistance is stronger.

The invention relates to a non-contact magnetic transmission absolute angle sensor for a steering system of an automobile, comprising a magnetic cylinder (1), a CPU control unit (7), a magnetic wheel mechanism and Hall sensors, wherein the magnetic wheel mechanism comprises two driven magnetic gears and a driving magnet wheel (5) which is in mesh connection with the driven magnetic gears, and one magnetic steel (1) is installed on the central part of each driven magnetic gear; the driving magnet wheel is fixed on a steering column (8); and one Hall sensor is installed adjacently to each magnetic steel, and the Hall sensors are connected with the CPU control unit by data wires. The invention has the advantages of low requirement on environment, high cost performance, wide range of measurement, insensitivity to error caused by temperature, convenient installation, etc.

The invention relates to belt slipping detection for belt conveyors and discloses a belt slipping detecting method for a belt conveyor. The method includes the steps of firstly, detecting switches and a retaining block are fixed on the rotary drum and the support of the belt conveyor; secondly, a time period t is set by using each rotation circle of the transmission rotary drum as a cycle; the output signals of two groups of detecting switches are monitored in real time, and if the output signals transmitted by the detecting switches cannot be detected in the time period t, a user can judge that belt slipping occurs. A belt slipping detecting device comprises the detecting switches, intermediate relays, time relays and an alarm. The detecting switches are powered by a switch power supply. One intermediate relay is connected into each group of detecting switch loop. One time relay is connected into each intermediate control loop. The control switches of the time relays are parallelly connected and connected into a delay relay control loop. The control output signals of a delay replay is connected with the alarm or the power-off control loop of the belt conveyor.

The invention discloses an operation mechanism of a motor. The operation mechanism comprises an auxiliary electronic switch, a controller, an angle detecting unit, a voltage detecting unit, a current detecting unit, a serial communication interface, a display unit, a data storage unit and a control button. The angle detecting unit is used for detecting the rotating angle of an output shaft of a motor speed reducer. The auxiliary electronic switch comprises a signal processing circuit and a power amplifying circuit, and the signal processing circuit comprises a TTL open collector six-normal-phase high-voltage driver, a TTL open collector six-reverse-phase high-voltage driver and multiple power amplifiers. The TTL open collector six-reverse-phase high-voltage driver is connected with the TTL open collector six-normal-phase high-voltage driver, and the power amplifiers are connected with the TTL open collector six-reverse-phase high-voltage driver. The TTL open collector six-normal-phase high-voltage driver is connected with the motor control end of the controller. The power amplifying circuit comprises multiple sets of solid relays. The operation mechanism is simple in circuit, reasonable in design, convenient to wire, good in using effect and capable of solving various problems existing in an existing operation mechanism of the motor.

The invention discloses a wind speed sensor and a detection method for detecting cotton foreign fibers. The central bearing is connected to the wind direction cup device through sliding balls. Several wind direction cups are evenly distributed in the circumferential direction outside the wind direction cup device; the middle section of the central bearing is coaxial. The gear is fixed, and the top of each saw tooth of the gear is fixedly pasted with a magnetic steel sheet; there is an inductive switch element on the front end of the Hall sensor. The inductive switch element is located near the magnetic steel sheet and the two are on the same level. The Hall sensor is internally connected The photoelectric coupler and the wind direction cup rotate with the wind to drive the central bearing and gear to rotate synchronously, and the Hall effect is generated between the magnetic steel sheet and the Hall sensor switch; then the frequency of the pulse signal is measured using the multi-cycle synchronization method through the microcontroller. The pulse signal is proportional to the signal of the wind direction cup rotational speed, achieving equal-accuracy measurement of the output signal in the entire frequency range, reducing the measurement error, and improving the measurement accuracy of the pulse signal frequency.

The invention discloses a two-channel Gray code magnetic coding device which comprises a collecting device I, a collecting device II and a power supply, wherein the collecting device I comprises a magnetically sensitive element I and a microprocessor I, and the collecting device II comprises a magnetically sensitive element II and a microprocessor II; the magnetically sensitive element I is connected with the microprocessor I, and the microprocessor I receives magnetic field variation sensing signals collected by the magnetically sensitive element I; the magnetically sensitive element II is connected with the microprocessor II, and the microprocessor II receives magnetic field variation sensing signals collected by the magnetically sensitive element II; and the power supply supplies electric energy for the magnetically sensitive elements and the microprocessors. By using the technical scheme of the invention, the magnetically sensitive elements and the microprocessors are used for processing detection signals to form two-channel coding data with extremely small repetition and error rate, interference between a completely independent two-channel data processing system and a power supply system can be avoid effectively, the stability of detection is increased, and the technical problem of large size of an optical coder is solved.

The invention relates to a control device used for achieving intermittent service of a single-chip microcomputer. The control device comprises a trigger signal generating device and a transistor time-delay relay, the trigger signal generating device is used for generating trigger signals and is provided with a first delay level to delay the trigger signals, the transistor time-delay relay is electrically connected with the trigger signal generating device and is provided with a second delay level, the transistor time-delay relay is used for receiving the trigger signals to connect, delay and close a working power supply of the single-chip microcomputer , and the retardation of the first delay level is larger than that of the second delay level. The transistor time-delay relay comprises a trigger circuit and a fast discharge reflex circuit, the trigger circuit is composed of a filed-effect tube, a resistor and a capacitor, and the fast discharge reflex circuit is composed of a filed-effect tube and a resistor. The transistor time-delay relay is contactless, small in size, less in power consumption, low in cost, interference resistant, stable in performance, convenient to integrate and package and accurate in metering when applied to the intelligent meters of water, power and gas.

The invention discloses a programmable voltage stabilizer based on a digital potentiometer, relating to a three-end adjustable linear voltage stabilizer. The invention provides a programmable voltage stabilizer based on digital potentiometer, which is flexible in use and high in regulation precision. In order to achieve the purpose, the invention adopts the following technical scheme: the programmable voltage stabilizer comprises a digital potentiometer and the three-end adjustable linear voltage stabilizer. The programmable voltage stabilizer is structurally characterized in that the digital potentiometer is serially connected between a resistor R1 and a resistor R2.

The invention relates to detection for belt slipping of a belt conveyor. A belt slipping detecting method of the belt conveyor includes the following steps that firstly, a roller and a support of thebelt conveyor are fixedly provided with detecting switches and stopping blocks; secondly, with rotating of the transmission roller rotates by one circle as a period, a time quantum t is set; and thirdly, output signals of the two detecting switches are monitored in real time, if the output signals sent by the detecting switches are not detected within the time quantum t, it is judged that belt slipping occurs. A belt slipping detecting device comprises the detecting switches, intermediate relays, time relays and an alarming device. Power is supplied to the detecting switches through a switching power source; one intermediate relay is connected in a loop of each detecting switch, and one time relay is connected in a control loop of each intermediate relay; control switches of the time relays are connected in parallel, and are connected into a control loop of a time delay relay; and a control output signal of the time delay relay is connected with the alarming device or a power-off control loop of the belt conveyor.

The invention discloses a self-service BLS training and assessment system based on a simulated person, and the system comprises a self-service BLS training and assessment system which is used for training and assessing the BLS theory and operation skills of a trainee, and issuing an electronic training certificate and further comprises a registration terminal, a student terminal, a teacher terminal, a teacher-student interaction terminal and a certificate holding terminal, and the registration terminal, the student terminal, the teacher terminal, the teacher-student interaction terminal and the certificate holding terminal are connected with the self-service BLS training and examination system. According to the invention, the self-service, intelligent and non-contact BLS training and assessment process can be realized, so that the BLS training and assessment are not limited by time and places. The system comprises registration of BLS training and assessment, theory and skill training and assessment, and an electronic certificate issuing function. Student BLS operation process conditions are intelligently, automatically and truly recorded and accurately analyzed, teachers can be replaced to directly assess and score the student BLS operation process, and teacher resources are saved.

The invention discloses an intelligent energy-saving management system. The system comprises a control center, the control center is connected with multiple relay nodes through a network coordinator and a node manager; each relay node is corresponding to one room; a sensing module and an intelligent control module are arranged in each room; the sensing module receives a signal from the corresponding relay node through a network or data line way, and performs the setting, and the sensing module converts the acquired information in the room into a signal to send to the intelligent control module. By controlling working states of an intelligent socket and the connected electric equipment under a state that the people is existent or inexistent, the relay is used for issuing a power on / power off strategy under the intelligent socket, the automatically managed equipment is in standby and power outage, thereby realizing the drop energy-saving and add up low-carbon and environmentally-friendlyconcept, the energy consumption of the comprehensive building can be reduced, and the operation cost of the comprehensive building is saved, the service life of the electric equipment can be prolonged, thereby realizing the maximum of the economic benefit.

The invention relates to a guide vane position feedback device for a horizontal hydraulic turbine set. The problem that an existing control switch, namely a guide vane feedback device, is low in precision and poor in stability is solved. The feedback device comprises a magnetic sensing non-contact type angle sensor, a measurement display controller, three supporting pieces and a coupler. A shell of the angle sensor is cylindrical and provided with a circular partition plate. Three arc-shaped through holes are circumferentially and evenly formed in the circular partition plate. The angle sensor is fixed to the three supporting pieces through bolts. A connecting rod is welded to the end face of a servomotor transmission shaft. The central line of the connecting rod and the central line of the servomotor transmission shaft coincide with each other. A rotating shaft is connected with the connecting rod through the coupler. The angle sensor is connected with the measurement display controller through a control line. The feedback device can well respond to the opening degree of a unit guide vane, the success rate of the start and stop of a unit is ensured, and the stable running reliability is improved.

The invention relates to an angle sensor device for a bar bending machine. The angle sensor device comprises a sensing part, an arc support frame arranged on a bending machine body, and a cylindrical main body bracket which is fixedly arranged on the arc support frame, wherein the sensing part comprises an upper induction part arranged on a main movement of the bending machine and a lower induction part arranged on the cylindrical main body bracket; the cylindrical main body bracket and the main movement are coaxial with each other by taking the arc support frame as mounting reference; and a rotating angle of the main movement of the bar bending machine realizes a specific angle required for bending steel bars through induction control between the upper induction part and the lower induction part. The coaxial angle sensor device is arranged on the main movement, so that the bar bending machine realizes automation; and because the distance of the sensing part in the radial direction is always kept consistent in the process of rotating the main movement, a stable and reliable effect is achieved during rotating induction control of the main movement.

The invention relates to a desk lamp and discloses an interactive desk lamp with a shape changed in case of touch. The interactive desk lamp comprises a lamp holder, a lamp shade which is arranged on the lamp holder, and a control circuit, wherein a motor and a backboard capable of being bent freely are arranged in the lamp shade; the motor is arranged in the lamp holder; a skeleton is arranged on the rotating shaft of the motor; a coupler is arranged between the rotating shaft of the motor and the skeleton; the bottom of the skeleton is fixedly connected with the rotating shaft of the motor by the coupler; a control circuit board, a light-emitting diode (LED) lamp strip and a touch sensor are arranged on the backboard; and the control circuit board is connected with the motor, the LED lamp strip and the touch sensor respectively. The interactive desk lamp has a novel and unique shape, a simple structure, low cost and longer service life than the traditional desk lamp and high practical value, does not have a contact, and is difficult to damage, and interactive experience, which is similar to the irritability of mimosa pudica excited by outside touch among plants, between a personand the desk lamp is successfully realized.

The present invention relates to a contactless enegy-saving starter which is characterized in that: the device includes a PTC thermosensitive resistor Rp, a three-end bidirectional controllable silicon T, a photocoupler U, a sensor L and a rectifying bridge D. In the present invention, a photocoupler U is used to trigger the three-end bidirectional controllable silicon T, thus, the situation that the controllable silicon is not conducted and stopped absolutely because of the un-synchrony of the phase of the triggered control signal and the started loop is avoided, and the reliability is improved greatly. Thus, not only the successful stating of the electric motor is assured, and the started loop is broke absolutely because the bidirectional controllable silicon is stopped absolutely after the starting is achieved. The energy consumption by the thermosensitive resistor Rp is eliminated because there is no current flowing through the PTC thermosensitive resistor Rp.

The invention relates to a motor controller and a method. The motor controller comprises a single-chip microcomputer circuit, a photoelectric isolation circuit, an amplifying circuit, a switch circuit, a feedback circuit and a brushless motor. The single-chip microcomputer circuit generates a pwm direct-current signal, and adjusts the output of the pwm direct-current signal according to a positionsignal and a steering signal. The photoelectric isolation circuit is used for carrying out optoelectronic isolation on the pwm direct-current signal. The amplifying circuit is used for amplifying thepwm direct-current signal. The switch circuit is used for carrying out the conduction according to the pwm direct-current signal, and generating a pwm three-phase square wave signal. The brushless motor generates a circular magnetic field in the brushless motor according to the pwm three-phase square wave signal so as to control the operation of the rotor of the brushless motor. The feedback circuit detects the input current of the brushless motor in real time, acquires the position and the steering of the rotor, generates current, position and steering signals and transmits the signals to the single-chip microcomputer circuit. Compared with the prior art, the safety of the single-chip microcomputer circuit can be effectively ensured. Meanwhile, the anti-interference capability is high, and the circular magnetic field is synthesized. The direct-current voltage utilization rate is improved, and the cost is reduced.

The invention relates to a laser interfered crop topping method and belongs to the technical field of crop plant protection. The laser interfered crop topping method comprises the steps that a laser generator produces two intersected and interfered laser beams; the laser generator is controlled to make the two laser beams intersected at a crop topping position; according to physicochemical properties of crops, the laser power is adjusted to damage a cell tissue structure at the topping position and block upward crop nutrient delivery, wherein the height of the crop topping position is determined according to the agricultural requirements, the laser generator produces two laser beams and is controlled to make the two laser beams intersected at the crop topping position, the two laser beams form interference at the position, a large amount of heat is dissipated to promote rise of the temperature of moisture in the cell tissue at the position, and the cell tissue structure at the topping position is damaged and upward crop nutrient delivery is blocked by adjusting the laser power. The laser interfered crop topping method achieves non-contact and damage-free crop topping trough laser interference, meets the green plant protection technology requirements and can effectively replace manual topping operation.

The invention discloses an equal pulse width modulation compensation dimming method. A bridge type chopper circuit, an output transformer, a bridge type rectifying power supply, an alternating-current filter, a voltage / current sampling circuit, an A / D (Analog to Digital) converter, a microcontroller, an MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor) or IGBT (Insulated Gate Bipolar Translator) driving circuit, a dimming setting circuit, a state display circuit, an emergency straight-through control circuit and a bus interface circuit are provided. An equal pulse width modulation signal is synthesized by using the hardware and software of the microcontroller to drive the bridge type chopper circuit, and variable voltage having a sinusoidal wave envelope line is generated at the middle point of a bridge arm, and is applied to a load after being superposed with input voltage through an output transformer in order to adjust output voltage and the brightness of an illuminating light source.

The invention provides an angle measurement method, system and device of a motor and a computer readable storage medium. The angle measurement method of the motor comprises the steps that a digital signal used for calculating the measurement angle of a motor rotor relative to the position of a magnetic angle sensor is acquired; according to the digital signal, calculating a measurement angle ''of the motor rotor relative to the position of a magnetic angle sensor, and comparing the measurement angle with a reference value of the angle so as to judge whether the measurement angle needs to be calibrated or not; if yes, calibrating the measurement angle on the basis of adding a calibration factor; and if not, returning to the step of acquiring the digital signal for calculating the measurement angle of the motor rotor relative to the position of the magnetic angle sensor. The rotating angle of the rotating shaft of the motor can be accurately measured, and the operation of the motor is accurately controlled.

The invention provides an oil mass electronic sensor which comprises a double-tube contactless oil mass electronic sensor, a single-tube contactless oil mass electronic sensor, a chuck, a clamping seat, a one-way air valve, a central tightness adjusting screw rod, a Hall magnetic-sensing effect contactless electronic switching circuit and an electrically heated automatic temperature control voltage comparison contactless switching circuit, wherein the chuck and the clamping seat are assembled with each other and are matched with the oil mass electronic sensors; the one-way air valve and the central tightness adjusting screw rod are assembled and matched with the chuck and the centre hole of the clamping seat. The oil mass electronic sensor is reasonable in integral structure, easy to assemble and applicable to volume production, has the advantages of fewer connectors, low material consumption, light weight, high degree of automation, stable working performance, long service life and strong environmental adaptability, and is an extremely ideal oil mass detection sensor for various automobiles.

The invention discloses a waste food treatment device and a waste food treatment method. The waste food treatment device comprises a waste food inlet, a grinding device and a motor, wherein the waste food inlet is configured to enable waste food to enter the grinding device; the grinding device comprises a grinding disk and a grinding ring; the motor is connected with the grinding disk and drives the grinding disk to rotate to drive the waste food on the grinding disk to be ground and discharged; the motor adopts an electronic centrifugal switch; and the electronic centrifugal switch is configured to control the motor to cut off a secondary winding when the current of the motor reaches a first current value, so that the rotating speed of the motor is increased to a first rotating speed, and the motor is operated, under the first rotating speed, to drive the grinding disk to rotate clockwise. By the adoption of the electronic centrifugal switch, the rotating speed of the motor during normal operation can be increased, and the operation is safe and reliable.

The invention provides a protector power supply isolation contactless relay. An AC switch is formed by a high counter voltage triode or a composite triode and a bridge rectifier. The base electrode of the high counter voltage triode or the composite triode is controlled by the emission electrode of an optical coupled isolator. Power of the collection electrode of the optical coupled isolator can be supplied by the collection electrode of the triode and can also be supplied by the secondary winding of a switching power supply or an independent isolation power supply. A control signal drives the triode through the optical coupled isolator so that the protector power supply isolation contactless relay is enabled to be conducted to control the contactor of a high-current circuit, and a protector power supply isolation contactless relay circuit and a motor protector can be integrally designed as a whole for planning layout of a circuit board and thus the area and the size of the circuit board can be reduced. The protector power supply isolation contactless relay is contactless, small in size and safe and reliable and can be widely applied to the fields of motor protection devices and electrical automation control.

The invention discloses an emergency power supply mains supply high-speed monitoring system which comprises a mains supply rectifier unit for receiving a mains supply voltage signal and rectifying the mains supply voltage signal to obtain a pulsating direct current voltage signal, a mains supply voltage sampling unit for obtaining a sampled pulsating direct current voltage signal through the voltage sampling of a pulsating direct current voltage signal, a synchronous assisted power supply unit for receiving the pulsating direct current voltage signal and obtaining a stable pulsating direct current voltage signal through voltage stabilizing processing, a signal amplifier isolation unit for carrying out power amplification isolation processing on the sampled pulsating direct current voltage signal, obtaining a pulsating direct current voltage signal which is subjected to power amplification isolation, and outputting the pulsating direct current voltage signal which is subjected to the power amplification isolation. According to the emergency power supply mains supply high-speed monitoring system, the design of the synchronous assisted power supply unit is employed, mains supply is directly supplied to the signal amplifier isolation unit via the synchronous assisted power supply unit, the circuit structure is simple, and the connection is simple.

The invention relates to a time code IRIG-B adaptive decoding device and decoding method. The device comprises an input circuit. The input circuit comprises an electric B code input circuit and an optical B code input circuit. The output of the electric B code output circuit is connected with a photoelectric isolation circuit. The B code output circuit and the photoelectric isolation circuit areconnected with the signal selection circuit. The signal selection circuit is connected with the central processing unit. The time receiving device can adapt the input IRIG-B code signals of two physical modes, and a program can be adaptively recognized regardless of the input signal of a physical interface. The compatibility of the time receiving device is improved; the automatic signal recognition is supported, and the user As long as the optical or electrical IRIG-B code signal is connected to the device, there is no need to set it, and it automatically recognizes which channel has a signaland automatically decodes it; after the currently used signal is cut off, the system will automatically switch to a channel with signals.

The invention is a device capable of organically combining touch switch, remote control switch, telephone remote controller, comprising a telephone network plug interface, a power inlet interface, a group of power outlet interfaces, a touch control switch group, a remote switch group, a programme-controlled controller controlled by telephone signals (also by network, to receive control signals from Internet), a thyistor group and an external remote controller, which are packaged in a housing, and an integrated controller connecting the touch control switch group, a remote control signal receiving control switch, the programme-controlled controller controlled by telephone signals in parallel. The invention has the advantages of remote control of household electrical appliances which can be started or stopped anytime anywhere, to save labor and effort; control by thyistor with no contact, no spark, no noise, low failure rate and long service life; integrated control with no interface of household lines and convenient maintenance.

The invention discloses a photoelectric coupling switching circuit-based single-chip switching power supply of an air conditioner controller. The single-chip switching power supply is characterized by mainly comprising a control chip U2, a diode rectifier U1, a transformer T, a field effect tube MOS, a diode D1, a resistor R7, a polar capacitor C5, a voltage buffer circuit, an active band-pass filter circuit, a photoelectric coupling switching circuit and a pulse width modulation circuit, wherein the photoelectric coupling switching circuit is connected between the control chip U2 and a secondary induction coil of the transformer T in series; and the pulse width modulation circuit is connected with an F pin of the control chip U2 and the photoelectric coupling switching circuit separately. According to the photoelectric coupling switching circuit-based single-chip switching power supply of the air conditioner controller, input voltage fluctuation can be effectively adjusted; voltage can be kept stable; band-pass voltage can be adjusted; and output voltage is consistent with reference voltage, so that the condition that the photoelectric coupling switching circuit-based single-chip switching power supply of the air conditioner controller can output stable voltage is ensured; and the attracting stability of a relay is effectively ensured.

The invention relates to a temperature-controllable electric oven and a working method thereof. The electric oven comprises a oven body, wherein multiple wind power-adjustable type fans are uniformlyarranged at the bottom of the oven body; an electrical bar is arranged above the fans; temperature sensors are arranged above the electrical bar and over the fans; the temperature sensor are in one-to-one correspondence to the fans; a baking net is arranged above the temperature sensors. According to the temperature-controllable electric oven and the working method thereof provided by the invention, the collocation between the fans and the temperature sensors can be adjusted to adjust the temperature as required so as to realize uniform heating; moreover, the product has a simple structure andis easy to operate.