48results about How to "Reduce cooling requirements" patented technology

The embodiment of the utility model provides a heat dissipation framework, a plug-in frame, network equipment and a communication system, relates to the technical field of communication, and is used for ensuring the heat dissipation requirement before and after network upgrading and reducing the cost at the same time. The heat dissipation framework comprises a heat dissipation frame body, at least one limiting piece and at least one fan box. The heat dissipation frame body is provided with a heat dissipation cavity. The heat dissipation frame comprises a first cavity wall and a second cavity wall which are oppositely arranged. And a first ventilation opening communicated with the heat dissipation cavity is formed in the heat dissipation frame body. The limiting piece is located in the heat dissipation cavity, and the limiting piece is arranged on the first cavity wall. A first containing cavity is formed between the surface of the side, away from the first cavity wall, of the limiting piece and the second cavity wall. The limiting piece divides the heat dissipation cavity into a second containing cavity and a third containing cavity in the extending direction of the limiting piece. The fan box is located in the heat dissipation cavity, and an air opening of the fan box faces the first ventilation opening. The fan box is in sliding fit with the limiting piece in the extending direction of the limiting piece.

The invention relates to the field of artificial intelligence chips, in particular to an artificial intelligence chip integrated with an on-chip memory array, a computing task processing method and electronic device.The chip comprises a controller and a plurality of processor-memory modules, obtaining a plurality of sub-calculation tasks; the processor-memory module comprises a processing unit group, a memory and a scheduler, the processing unit group comprises a plurality of processing units, and the processing units process the sub-calculation tasks; the memory stores data related to the plurality of processing units in the processing unit group when executing the corresponding sub-calculation tasks; the scheduler is connected to the plurality of processing units and the memory and is used for scheduling access operation of the plurality of processing units to the memory, the processing unit group is arranged in a processing layer of the artificial intelligence chip, the memory is arranged in a storage layer of the artificial intelligence chip, and the processing unit group is used for processing the processing units. The processing layer and the storage layer are arranged in a stacked mode.

The variable speed driving system of the hybrid power vehicle is mainly characterized in that a speed change device is not installed behind an engine, and power is directly transmitted to a drive axle through a transmission shaft, or when the engine is transversely arranged on the drive axle, the power is transmitted through a tooth-shaped chain, so that the power of the engine can be transmitted to wheels only through one-stage gear speed reduction, and the power transmission efficiency is improved. The highest transmission efficiency is achieved, the torque borne by a transmission system is reduced, and the weight and cost are reduced; medium-speed and low-speed driving of the vehicle is mainly completed by a speed change device and a motor on a drive axle; the invention relates to an engine retroverted multi-output-end planetary gear set speed change device and a drive axle speed change device, so that a variable speed driving system is more energy-saving, and the cost is reduced.

The utility model relates to the field of inverter welding machines, in particular to a high-power-density welding machine power supply based on silicon carbide full-bridge inverter type double parallel inverters, which comprises a rear panel component, an upper connecting plate component, a first silicon carbide inverter component, a second silicon carbide inverter component, a front panel component and a bottom plate component. The rear panel part comprises an input switch and a cooling fan; the upper connecting plate component comprises an auxiliary power transformer, a main control board, a driving board and a rectifying and filtering device; the first silicon carbide inverter assembly comprises a first silicon carbide inverter plate, a radiator, a first high-frequency transformer, a secondary rectifying plate and a radiator; the second silicon carbide inverter assembly comprises a second silicon carbide inverter plate, a radiator, a second high-frequency transformer, a secondary rectifying plate and a radiator. Based on the innovation and change, the size and the weight of the power supply of the high-power output inverter welding machine can be greatly reduced, high power density is achieved, the production cost is reduced, and the use requirement of market portability is met.

The invention relates to the technical field of industrial tail gas treatment, and provides a carbon dioxide separation and capture system which comprises a vortex tube assembly at least comprising a first vortex tube and a second vortex tube, an inlet of the first vortex tube is used for introducing gas, and a cold end outlet of the first vortex tube is connected with an inlet of the second vortex tube; a cold end outlet of the second vortex tube is sequentially connected with a condenser and a gas-liquid separation device through a pipeline; the gas-liquid separation device is provided with a gas outlet and a liquid outlet; the heat exchanger is provided with a cold fluid inlet and a hot fluid inlet, the cold fluid inlet is connected with the liquid outlet through a pipeline, the hot fluid inlet is simultaneously connected with a hot end outlet of the first vortex tube and a hot end outlet of the second vortex tube through pipelines, and the heat exchanger is further provided with a cold fluid outlet; the storage tank is connected with a cold fluid outlet of the heat exchanger and used for storing liquid carbon dioxide; the cold energy is fully utilized while the carbon dioxide storage difficulty is reduced, and the overall energy utilization efficiency of the system is improved.

The invention relates to the technical field of power supplies, and discloses a self-driven active bridge rectifier circuit and electronic equipment, and the circuit comprises a passive rectifier unit composed of a diode D2 and a diode D4, a switch tube Q1, a switch tube Q2, a first comparison circuit and a second comparison circuit. The positive electrode of the diode D2 is connected with the L end of the input power supply, the positive electrode of the diode D4 is connected with the N end of the input power supply, and the negative electrode is connected with a load. The drain electrode of the switch tube Q1 is connected with the L end of the input power supply, the source electrode is grounded, and the grid electrode is connected with the output end of the first comparison circuit. A first input end of the first comparison circuit is connected with an N end of an input power supply, and a second input end is connected with reference voltage. The drain electrode of the switch tube Q2 is connected with the N end of the input power supply, the source electrode is grounded, and the grid electrode is connected with the output end of the second comparison circuit. The first input end of the second comparison circuit is connected with the L end of the input power supply, and the second input end of the second comparison circuit is connected with reference voltage. The rectifying circuit can further improve the power density of the power supply.

The utility model relates to an anti-condensation heating control device and a refrigerator. The anti-condensation heating control device comprises a control module and a condensation detection module. The control module comprises a comparator and a relay, the first output end of the comparator is electrically connected with the relay, and the relay is electrically connected with the heating device; the moisture condensation detection module comprises a first moisture condensation detection unit and a second moisture condensation detection unit, the first moisture condensation detection unit is electrically connected with the first input end of the comparator, and the second moisture condensation detection unit is electrically connected with the second input end of the comparator; the first condensation detection unit is used for detecting the surface humidity of cabinet door glass and outputting a first voltage to the comparator; the second condensation detection unit is used for detecting environment humidity and outputting a second voltage to the comparator; the comparator is used for controlling on or off of the relay. Through the arrangement, compared with a single chip microcomputer, the comparator has the advantages of being low in price and high in anti-interference performance, the requirements for the performance of a power supply, electromagnetic shielding and heat dissipation of the whole machine are lowered, and the cost of the whole machine is lowered.

The invention discloses a reference voltage logic circuit, which is characterized by comprising a voltage comparison circuit, a reference voltage generation circuit and a reference voltage generation circuit, judging whether the voltages of all the feedback signals are higher than a first set voltage so as to determine the logic potential of an output point A and judging whether the voltage of at least one feedback signal is lower than a second set voltage so as to determine the logic potential of an output point B; the voltage selection logic circuit outputs a plurality of control signals according to the logic potentials of the output point A and the output point B; the voltage regulation logic circuit outputs a new reference voltage according to the plurality of control signals, when the voltages of all the feedback signals are higher than the first set voltage, the new reference voltage is lower than the old reference voltage, and when the voltage of at least one feedback signal is lower than the second set voltage VL, the new reference voltage is lower than the old reference voltage. The new reference voltage is higher than the old reference voltage, and the first set voltage is higher than the second set voltage.

The embodiment of the invention provides a charger output anti-reverse connection and anti-reverse charging protection device and a control method thereof, and belongs to the technical field of charging safety. The device comprises a detection circuit 1, a detection circuit 2, a detection circuit 3, a relay control circuit 1, a relay control circuit 2, an anti-backflow diode, a first relay and a first diode which is arranged on a control coil of the first relay in an anti-parallel mode, and a second relay and a second diode which is arranged on the control coil of the second relay in an anti-parallel mode. Wherein the detection circuit 1 is used for detecting a voltage signal of an output end of the charger, the detection circuit 2 is used for detecting voltage polarity of a battery end, the detection circuit 3 is used for detecting an output current signal of the charger, and the relay control circuit 1 is used for controlling connection and disconnection of an output first relay. The relay control circuit 2 is used for controlling connection and disconnection of the second relay. According to the scheme of the invention, effective protection of battery reverse connection and current backflow is realized, and the reliability and safety of the system are remarkably improved.

The utility model discloses an asymmetric cooperative control three-phase balance motor soft starter, comprising a three-phase AC power supply input end, a power adjusting unit, an output end connected to a three-phase asynchronous motor, and a main controller which are connected in sequence. The power adjusting unit comprises an A-phase control module which is internally provided with a first thyristor at least controlled by a main controller; the B-phase control module is internally provided with a pair of antiparallel second thyristors controlled by the main controller; and the C-phase control module is internally provided with a pair of third thyristors which are controlled by the main controller and are reversely connected in parallel. The main controller cooperatively controls the conduction angles of the first thyristor, the second thyristor pair and the third thyristor pair in the starting process of the motor by outputting a control signal so as to adjust the voltage applied to the motor and improve the balance of the three-phase output voltage. According to the utility model, the three phases are controlled, so that the three-phase balance during starting is effectively improved, and the vibration and noise of the motor are reduced.

The utility model provides a kind of air conditioner soft-start control system, air conditioner starting interface, current detection module, power control unit, bypass unit, temperature detection module, through bypass unit through soft-start, start smooth, reliable operation, when magnetic retainer B is attracted, the trigger signal of thyristor SCR3, thyristor SCR4 is removed, thyristor SCR3, thyristor SCR4 stop conducting, compared with traditional contactor in entire bypass conduction period needs to continue coil power supply, can realize significant energy saving, system long-term operation total energy consumption is greatly reduced, while avoiding coil continuous heating problem, it is favorable to improve system overall reliability and reduce heat dissipation demand;While setting phase-loss protection module, distinguish zero line loss and fire line loss etc. Fault type, accurate trigger protection and store fault code, diagnosis is convenient.

The invention relates to the technical field of superconducting magnet refrigeration, in particular to a three-stage refrigeration system based on a superconducting magnet, which is characterized in that a magnet is placed in a heat preservation container, the heat preservation container is arranged in a vacuum low-temperature thermostat, and the vacuum low-temperature thermostat is arranged in a main vacuum low-temperature thermostat; one end of the power source assembly sequentially penetrates through the main vacuum low-temperature thermostat, the vacuum low-temperature thermostat and the heat preservation container to be connected with the magnet, the water cooling module is connected with one side of the power source assembly, and the secondary nitrogen cooling module is communicated with the interior of the main vacuum low-temperature thermostat. And the third-stage helium cooling module communicates with the interior of the heat preservation container, so that according to the technical scheme, the refrigeration speed is high, loss of a refrigeration medium is avoided, cost is low, step-by-step cooling can be achieved, and the system is stable.

The invention discloses a fuel cell hybrid power control system, which comprises a power cell negative electrode bus, a power cell positive electrode bus, a fuel cell negative electrode bus, a fuel cell positive electrode bus and a motor, each motor winding connecting end is respectively connected with a power battery cathode bus, a power battery anode bus, a fuel cell cathode bus and a fuel cell anode bus through an independent electronic switch; each electronic switch is provided with a control signal end. A DCDC direct current transformer and a motor controller are mutually combined, a six-path full-bridge motor control circuit and a Buck Boost Buck-Boost direct current transformation circuit are mutually combined, and a motor coil is also used as an energy storage coil of the direct current transformer, so that the structure is simplified, the size, weight and cost of the energy storage coil are reduced, and the corresponding energy loss and heat dissipation requirements of the energy storage coil are reduced.

The embodiment of the invention provides projection equipment, a laser television and a vehicle, the projection equipment comprises an MEMS galvanometer chip, the MEMS galvanometer chip adopts silicon carbide as a chip substrate, and compared with a silicon-based chip, the silicon carbide has the characteristics of high thermal conductivity, high forbidden band width and the like, and the MEMS galvanometer chip has the advantages of high thermal conductivity and high forbidden band width. According to the MEMS galvanometer chip, the rotating suspension beam integrated with the mirror surface in the projection equipment using the MEMS galvanometer chip is not easy to damage at high temperature and low in heat dissipation requirement, the problems caused by working temperature rise such as fusing of the rotating suspension beam are avoided, the projection equipment has better environment adaptability, the heat dissipation requirement is low, the heat dissipation structure can be reduced, and the projection equipment is more miniaturized.

The present invention provides a flat-panel CT machine, including a ray emitter and a flat-panel detector, which adopts 360° scanning or 180° scanning. The flat-panel detector uses a larger length and width than the flat-panel detector used for DSA, can cover a single part of the human body, and no longer needs spiral scanning; the scanning time is greatly reduced, which can effectively reduce motion artifacts; the radiation dose of the patient is greatly reduced; the spatial resolution and the number of longitudinal scanning layers are greatly improved, and it is a gapless scanning. The pulse control technology of X-ray emission is adopted to make the data obtained by the CT machine complete and without missing, and the image is clearer. Through pulse control technology or 180° scanning mode, the scanning frequency is reduced by half; pulse control technology can reduce the requirement for the mobility of the detector thin film transistor by about 10 times; by redesigning the number of detector array elements to further reduce the frequency, and control the inverter frequency of the ray emitter within an achievable range, the CT machine has the possibility of practical application.

The application discloses a switching type frequency elimination flash circuit, comprising a filter capacitor for accessing the pulsed direct current of an adjustable light constant current circuit output, an adjustable constant current circuit for converting the direct current voltage output by the filter capacitor into direct current to drive an LED light emitting circuit to emit light, and a signal conversion circuit for generating a corresponding adjustment signal according to the average value of the voltage signal output by the filter capacitor, so as to control the adjustable constant current circuit to convert the input voltage connected thereto into corresponding direct current output in a switching conversion mode; the circuit has the advantages of high conversion efficiency, low cost, and low heat dissipation requirement.

The present invention relates to the technical field of electric fault monitoring, and in particular to an electric energy meter box with a temperature monitoring function and a monitoring method. Firstly, the relative abnormality of temperature is determined according to the characteristic that the corresponding temperature monitoring delay requirement should be shorter when the electric energy meter box is in an abnormal overheating condition at a terminal; further, the heat dissipation stability is determined according to the characteristic that when the heat dissipation of the electric energy meter box is relatively stable, the possibility of a large temperature fluctuation is small, so that the temperature monitoring delay requirement is shorter; further, the radiator temperature control capability value is determined according to the characteristic that when the temperature control capability of the radiator of the electric energy meter box is strong, the possibility of a normal temperature fluctuation exceeding a temperature threshold is small, so the temperature monitoring delay requirement should be shorter; finally, the temperature monitoring delay weight is comprehensively determined by combining the relative abnormality of temperature, the heat dissipation stability and the radiator temperature control capability value, so that the accuracy of temperature abnormality monitoring of the electric energy meter box according to the temperature monitoring delay weight is higher.

The application discloses a memory testing device, method, electronic equipment and storage medium, and relates to the technical field of computers.The device comprises a field programmable logic gate array module, a memory controller module and a memory module; the field programmable logic gate array module is used for receiving instructions of a testing end and delivering the instructions and test cases to the memory controller module; the memory controller module is used for training and / or testing a memory to be tested according to the instructions and returning training results and / or test results to the field programmable logic gate array module; and the field programmable logic gate array module is further used for receiving the training results and / or test results to obtain analysis results, and sending the training results and / or test results and the analysis results to the testing end.The application can reduce the demand of testing on a hardware environment, reduce the use threshold and reduce the cost.

The present embodiment discloses a semiconductor device and a method for manufacturing the same, the method comprising providing a silicon carbide body; forming a first groove extending from a first surface of the silicon carbide body into the silicon carbide body; forming a first isolation layer and a first polysilicon in the first groove, the first isolation layer being located between the first polysilicon and the bottom of the first groove, and between the first polysilicon and two side walls of the first groove; forming a second polysilicon and a second isolation layer in the first groove, the second isolation layer being located between the second polysilicon and two side walls of the first groove, and the second isolation layer and the first isolation layer completely covering the first polysilicon; forming a second groove extending from the second polysilicon to the bottom of the first groove, the second groove at least exposing a portion of the bottom of the first groove; and oxidizing a portion of the first polysilicon and a portion of the second polysilicon at a high temperature to form a third isolation layer, so that the first isolation layer, the second isolation layer and the third isolation layer completely cover the first polysilicon and the second polysilicon.

The invention discloses a 3300V SiC DMOSFET low-conduction resistance device optimization method, and belongs to the technical field of low-conduction resistance device optimization, the 3300V SiC DMOSFET low-conduction resistance device optimization method comprises external parameter selection, cellular size design, JFET region global doping and process design, the external parameter selection comprises selection of proper epitaxial thickness and doping concentration of the device, the selection of the epitaxial thickness comprises selection of the epitaxial thickness and the doping concentration of the device, and the selection of the epitaxial thickness comprises selection of the epitaxial thickness and the doping concentration of the device. Simulation is based on Sensor TCAD software, a half-cell structure is adopted, the simulation efficiency is improved, the area of an active region is 1.2 mm < 2 >, a breakdown condition criterion is a current abrupt change method, when the drain end current is larger than (Afault factor * 1 * 10 <-11 >), it is determined that the device is broken down, area factor is used for representing the current density of the device in a three-dimensional plane, and the current density of the device in the three-dimensional plane is used for representing the current density of the device in the three-dimensional plane. According to the optimization method of the 3300V SiC DMOSFET low-conduction resistance device, higher power density can be realized in smaller packaging, meanwhile, the heat dissipation requirement and the overall size of the system are reduced, and in addition, the response speed and the stability of a circuit are improved due to the rapid switching characteristic and the low dynamic loss of the 3300V SiC DMOSFET low-conduction resistance device.

The invention relates to the technical field of air conditioning, in particular to an air supply structure, an air supply system, a koji room and an air supply control method. The air supply structure comprises an air supply branch pipe, a first air valve assembly and a second air valve assembly. One end of the air supply branch pipe is an air inlet end, and an air supply section with a plurality of air supply holes in the pipe wall is formed on the air supply branch pipe; the first air valve assembly comprises a first driving mechanism and a first air valve arranged in the air supply section, and the first driving mechanism is configured to drive the first air valve to move in the air supply section so as to be close to or away from the air inlet end; the second air valve assembly comprises a second air valve arranged in the air supply section, and the second air valve is located between the first air valve and the air inlet end. According to the method, targeted air supply can be conducted on the local heating area in the space, unnecessary whole-area air supply is reduced, cooling capacity is concentrated in the hot spot area, the method can adapt to constantly-changing hot spot positions, and the air supply area and the air supply amount can be adjusted.

The invention relates to the technical field of power semiconductor devices, and discloses a preparation method of a phase change heat absorption power semiconductor device, and the method comprises the steps: determining the type and packaging structure of the power semiconductor device, analyzing the heat transfer path of a heating body of the power semiconductor device, and determining a phase change heat absorption structure which comprises a built-in phase change heat absorption structure and a fusion type phase change heat absorption structure; according to different phase-change heat absorption structures, material systems and composite structure types of the phase-change heat absorption structures are analyzed and determined, then the technological process of the phase-change heat absorption power semiconductor device is provided according to the phase-change heat absorption structures, and preparation of the phase-change heat absorption power semiconductor device is completed. According to the preparation method of the phase change heat absorption power semiconductor device, the power semiconductor device with the phase change heat absorption function is prepared, the safety margin is high, and the heat dissipation requirement is low.

The present invention is applicable to the technical field of audio power amplifiers, and provides a class D audio power amplifier and a signal compression method. The class D audio power amplifier includes: a controllable limiter, a class D amplifier, a first filter, a second filter, and a logic control module. In the present application, when an abnormal signal appears in the filtered signal, the logic control module compresses the filtered signal to reduce the amplitude of the abnormal signal in the filtered signal, that is, the compression processing of the abnormal signal effectively reduces the compression and distortion phenomenon of the class D audio power amplifier when processing low-frequency signals, improves the sound quality performance of the audio amplifier, and the audio power amplifier device is smaller in size and lighter in weight, which is easy to carry and install. In addition, the circuit structure of the present application has high energy conversion efficiency, which can effectively reduce the energy consumption of the power amplifier device and reduce the waste of electric energy, while reducing heat generation, reducing heat dissipation requirements, and improving the stability and life of the equipment.

The application discloses a liquid metal-phase change working medium composite type temperature equalizing cold plate and belongs to the technical field of electronic equipment heat dissipation. The device comprises a shell, a first flow channel, a second flow channel, an evaporation cavity, a condensation cavity, a partition plate and a filling port. The liquid metal flows inside the first flow channel to absorb heat. The first flow channel is internally provided with the partition plate. The liquid metal changes the flow direction at the partition plate and enters the second flow channel to release heat. The second flow channel is staggered with the evaporation cavity. The phase change working medium inside the evaporation cavity absorbs the heat transferred by the liquid metal inside the second flow channel. The steam formed by the evaporation of the working medium is condensed on the wall surface of the condensation cavity. The condensed liquid working medium flows back to the evaporation cavity through the inclined wall surface. The filling port is communicated with the condensation cavity and can adjust the pressure of the phase change working medium by filling and discharging the working medium. The application combines the liquid metal with the phase change heat transfer, effectively suppresses the temperature rise in the heat exchange process of the liquid metal, improves the temperature equalization of the electronic equipment and enhances the reliability of the equipment.

The utility model relates to a product extraction device for producing acetone through synthesis gas pressure fermentation, which comprises a synthesis gas pressure fermentation tank, a membrane filtration unit, a reduced pressure flash tank, a gas condensation pipe and an acetone storage tank, a liquid inlet of the membrane filtration unit is communicated with a fermentation liquid discharge port, and a reflux inlet of the membrane filtration unit is communicated with the fermentation tank; a liquid inlet of the reduced-pressure flash evaporation pipe is communicated with a liquid outlet of the membrane filtration unit; a gas inlet of the gas condensation pipe is communicated with a vapor phase outlet of the vacuum flash tank; and a condensate outlet of the gas condensation pipe is communicated with an acetone storage tank. According to the product extraction device, firstly, thalli of fermentation liquor are intercepted through the membrane filtration unit, the activity of the thalli is reserved, and the influence on the activity of the thalli is low; according to the invention, acetone is used as a raw material, then the reduced pressure flash tank is used for reducing the pressure of the fermentation liquid and then flash evaporation is carried out, the temperature is maintained at 60 DEG C by using fermentation waste heat, so that the acetone is rapidly vaporized to form gas-liquid two-phase flow, and the design not only improves the vaporization efficiency of the acetone, but also reduces the additional cooling requirement and reduces the energy consumption.

The invention provides a battery charging method and a battery management system thereof. The method comprises the steps that the charging time and the charging amount percentage required by a battery to fully charge a specified SOC interval are obtained, the charging stage corresponding to the specified SOC interval is configured to be divided into a first charging stage and at least one second charging stage, the first charging stage is configured to be a fast charging stage, and the second charging stage is configured to be a non-fast charging stage; the initial charging rate of the first charging stage is adjusted to obtain a first charging rate, the initial charging rate of the second charging stage is adjusted to obtain a second charging rate, and the first charging rate is smaller than the initial charging rate of the first charging stage; and charging the battery by using the first charging rate and the second charging rate, so that the sum of the first charging time and the second charging time is equal to the charging time.

The invention discloses a laser depilation control and depilation instrument supporting sliding type continuous treatment, and relates to the field of beauty instruments. The method comprises the steps that in the process of moving a treatment head, skin images are collected in real time to obtain continuous image frames, and the linear acceleration and the angular velocity of the treatment head are collected; performing hair follicle target recognition on the image frame, extracting the position of a hair follicle, generating a data packet containing a timestamp and a target coordinate, and inserting the data packet into a task queue according to the timestamp; according to the linear acceleration and the angular velocity, the instantaneous velocity and the motion direction vector of the treatment head relative to the skin are obtained; and sequentially reading the data packets from the task queue, extracting target point coordinates from the data packets to perform laser irradiation, and performing fine adjustment compensation on the laser irradiation position according to the instantaneous speed and the motion direction vector. A sliding continuous treatment scheme is provided, and efficient, comfortable and quiet hair removal experience is achieved.

The invention discloses a reference voltage logic circuit, which is characterized by comprising a voltage comparison circuit, a reference voltage generation circuit and a reference voltage generation circuit, judging whether the voltages of all the feedback signals are higher than a first set voltage so as to determine the logic potential of an output point A and judging whether the voltage of at least one feedback signal is lower than a second set voltage so as to determine the logic potential of an output point B; the voltage selection logic circuit outputs a plurality of control signals according to the logic potentials of the output point A and the output point B; the voltage regulation logic circuit outputs a new reference voltage according to the plurality of control signals, when the voltages of all the feedback signals are higher than the first set voltage, the new reference voltage is lower than the old reference voltage, and when the voltage of at least one feedback signal is lower than the second set voltage VL, the new reference voltage is lower than the old reference voltage. The new reference voltage is higher than the old reference voltage, and the first set voltage is higher than the second set voltage.

The invention provides wireless local area network terminal equipment and a control method thereof. According to the method, a plurality of rate modes and transmitting power modes are configured for the wireless local area network terminal equipment, when a detection period arrives, the network quality is detected and the corresponding index is acquired, if the network quality index does not meet the requirement, the rate is preferentially reduced to improve the sensitivity so as to improve the network quality and keep low power consumption, and the method is suitable for the wireless local area network terminal equipment. And if the rate mode reaches the lowest, the network quality is improved by improving the transmitting power mode. And if the network quality index is higher than or equal to the target value, selecting a transmitting power mode as low as possible and a rate mode as high as possible on the premise of keeping the network quality to meet the requirement, and seeking optimal mode matching. According to the rate mode and the transmitting power mode which are finally obtained through the method, the maximum sensitivity is obtained on the premise that the minimum power consumption is guaranteed, the equipment power consumption is optimized, the heat dissipation requirement is reduced, the endurance is improved, and outdoor flexible deployment is facilitated.

The utility model discloses a built-in heat dissipation type geometric projection lamp which comprises a heat dissipation shell, a light source module is installed in the heat dissipation shell, a light-transmitting cover body is further installed on the upper portion of the heat dissipation shell, heat dissipation fins are arranged on the inner wall of the heat dissipation shell, an annular gap is formed in the middle of the heat dissipation shell, and the annular gap is communicated with an inner cavity of the heat dissipation shell. A bottom cover is mounted at the bottom of the heat dissipation shell; an electric appliance shell is further arranged on the lower portion of the heat dissipation shell, a power source assembly is installed in the electric appliance shell and electrically connected with the light source module, and an electric appliance cover is installed on the lower portion of the electric appliance shell. According to the geometric projection lamp, the light source module and the power source assembly are arranged in a split mode, mutual cross influence of a light source and a heat source of a power source when the geometric projection lamp is used is avoided, on the basis, the cooling fins of the cooling shell can be arranged on the inner wall of the cooling shell, air convection cooling can be achieved only through the annular gaps, external cooling fins are not needed, and the heat dissipation efficiency is improved. And the radiating fins are prevented from influencing the attractiveness of the lamp body, so that the projection lamp can be used in an open mounting manner.