59results about How to "Control operating frequency" patented technology

The invention discloses a control method and device for an air conditioner compressor, and an air conditioner. The control method comprises the step of circularly executing the following winding switching control processes: the temperature difference between the real-time indoor temperature and an indoor temperature target value is calculated, and the real-time indoor temperature difference is obtained and compared with a first set indoor temperature difference threshold; if the real-time indoor temperature difference is not less than the first set indoor temperature difference threshold, windings of the compressor are controlled to be connected in a triangle mode; and if the real-time indoor temperature difference is less than the first set indoor temperature difference threshold, the windings of the compressor are controlled to be connected in a star-shape mode. By applying the control method, overall operation performance of the air conditioner can be improved.

The invention discloses a control method of an air conditioner. A fan is provided, the fan is provided with a plurality of rotating speed intervals, and different rotating speed intervals are in one-to-one correspondence with different compressor operating frequencies. The control method comprises the following steps: 1, acquiring a temperature value T1 of a room of the air conditioner; 2, comparing the obtained temperature value T1 with a temperature value Ts set by a user, and adjusting the rotating speed of the fan according to the comparison result; and 3, controlling the compressor operating frequency according to the fan rotating speed determined in the step 2. A control device comprises a temperature acquisition module, a fan rotating speed judgment module and a compressor frequency control module. According to the control method and the control device of the air conditioner, which are provided by the invention, the compressor operating frequency is controlled through the fan rotating speed and the refrigerating capacity of the air conditioner is intelligently adjusted, so the intelligent level of the air conditioner is increased and user experience on the air conditioner is better; furthermore, the energy consumption of the air conditioner is reduced, so that the energy-saving effect of the air conditioner is better.

The invention provides a user comfort-based energy-saving control method in a refrigerating mode of an air conditioner. Through monitoring of indoor and outdoor temperature and based on the temperature difference between indoor temperature and set temperature of an energy-saving control mode, the method can control the operation frequency of an inverter compressor, the opening degree of an electronic expansion valve and the wind speed of indoor and outdoor fans more accurately, so that the operation power of a whole air conditioner can be reduced as much as possible on the premise that the user comfort is guaranteed.

The invention discloses an oil returning control system. The oil returning control system comprises a pressure detection device arranged on an air conditioner system and a control device connected to the pressure detection device; the pressure detection device is used for detecting the pressure of the air conditioner system and sending a measured pressure value to the control device; and the control device is used for controlling the running frequency of an air conditioning unit according to the pressure of the air conditioner system. The invention further discloses an oil returning control method. The oil returning control method includes the steps that the pressure of the air conditioner system is detected in real time; and the running frequency of the air conditioning unit is controlled according to the pressure of the air conditioner system. In the oil returning control system and the oil returning control method, the running frequency can be adjusted high when the pressure is low, the flowing speed of refrigerants is increased, and therefore lubricating oil can return to a compressor easily, by means of the manner, oil returning can be accurately controlled according to the running frequency, and the oil returning reliability is improved; and meanwhile, the system pressure can also be increased while the running frequency is increased, the lubricating oil of the compressor will be within a more proper temperature range, the lubricating effect is better, and the system reliability is further improved.

The invention discloses a controlling method of an air conditioner, and the controlling method comprises the following steps of: receiving a noise adjusting instruction from an user; if the noise adjusting instruction is the noise reduction instruction, further judging whether to satisfy a noise reduction condition according to present temperature and preset target temperature in a room; if so, reducing operating frequency of an indoor unit; if not, retaining the operating frequency of the indoor unit. Through the controlling method, the operating frequency of the indoor unit can be controlled according to an user demand, such that the user can intuitively control noise so as to promote the user's experience. The invention further discloses a control device of an air conditioner and an air conditioner.

The invention discloses an air conditioning system and a dehumidification control method thereof. The method comprises the following steps that after the air conditioning system enters a dehumidification mode, the air conditioning system is controlled to achieve refrigeration operating, and an electric heating unit of the air conditioning system is controlled to carry out heating; after the air conditioning system achieves refrigeration operating for a first preset time, the air conditioning system is controlled to be switched to heating operating, and the electric heating unit is controlled to continue to carry out heating; and after the air conditioning system achieves heating operating for a second preset time, the air conditioning system is controlled to achieve refrigeration operating again for the first preset time, so that the air conditioning system cyclically carries out refrigeration and heating. Therefore, by means of cyclic refrigeration and heating, the dehumidification aim is achieved on the premise of guaranteeing that the temperature of an air conditioning system room is reduced slowly or is not reduced.

The invention discloses an ultra wideband differential antenna with reconfigurable trapped wave, and a technical problem that the trapped wave of an existing ultra wideband differential antenna can not be reconstructed and the volume is large is mainly solved. The ultra wideband differential antenna comprises a micro strip feeder (1), a micro strip dielectric substrate (2), a metal grounding plate (3) and a radiation unit (4). Two sides of the micro strip feeder are provided with micro strip short circuit stubs (5), the center of the metal grounding plate (3) is provided with a slot line structure (6), two sides are provided with reflectors (7), and a guide device is arranged in front of the radiation unit. Each of the micro strip short circuit stubs (5) comprises a uniform impedance resonator and a variode, the adjustment of a trapped wave center frequency is realized through adjusting the control voltage of the variode, the distance between each uniform impedance resonator and the micro strip feeder is changed synchronously, and the independent adjustment of a trapped wave bandwidth is realized. The ultra wideband differential antenna has the advantages of a reconfigurable trapped wave center frequency and a small volume and can be used for mobile communication.

The invention discloses an APP-set bracelet type optical photon radial artery detection and treatment all-in-one device. The device comprises a control management circuit unit, a display unit, a radial artery detection module, an optical output security module, a laser treatment module, a key, a rechargeable battery, an external charging power supply, a display screen, a waterproof shell, a bottom cover and a bracelet, wherein the control management circuit unit is composed of an MCU (Microprogrammed Control Unit) central processing unit, a bluetooth module, a vibration prompter, a peripheral management circuit and a power management circuit; the bluetooth module, the display unit, the radial artery detection module, the optical output security module, the laser treatment module, the key, the vibration prompter, the peripheral management circuit and the power management circuit are respectively connected with the MCU central processing unit; the rechargeable battery and the external charging power supply are respectively connected with the power management circuit; the bluetooth module is in wireless connection with an APP software platform of a smartphone and is used for controlling all parameters of the laser treatment module, the radial artery detection module, the optical output security module, the vibration prompter and the display unit.

The invention relates to a vehicle condition abnormality identification system which comprises a plurality of on-site positioning devices, a plurality of vibration sensors, a positioning data receiving device and a vibration data processing device. The multiple on-site positioning devices are arranged on a plurality of buses in a city and are used for respectively transmitting a plurality of on-site positioning data corresponding to the multiple buses; the multiple vibration sensors are arranged on the multiple buses in the city and used for respectively transmitting a plurality of site vibration data corresponding to the multiple buses; the positioning data receiving device is located at the big data processing end and used for receiving the multiple on-site positioning data sent by the multiple on-site positioning devices in the multiple buses in the city; and the vibration data processing device is located at the big data processing end and is used for receiving the multiple on-sitevibration data sent by the multiple vibration sensors of the multiple buses in the city and conducts recognized processing on whether each scene vibration datum exceeds the limit or not. By means ofthe vehicle condition abnormality identification system, a big data processing mode can be used for judging whether the buses have abnormality or not and implementing the associated control over equipment.

The invention relates to the technical field of air conditioners, in particular to a control method and device for automatically recovering a refrigerant of an air conditioner, the air conditioner anda computer readable storage medium. The air conditioner comprises an indoor unit and an outdoor unit, an indoor heat exchanger is arranged in the indoor unit, the indoor unit is provided with a firsttemperature sensor, the indoor heat exchanger is provided with a second temperature sensor, the outdoor unit is provided with a compressor, the outdoor unit is provided with a third temperature sensor, a fourth temperature sensor is arranged at the position, connected with the compressor and the indoor heat exchanger, of an air return pipe. According the the air conditioner, a user can send a refrigerant recovery instruction through a remote controller of the air conditioner, the compressor is controlled to carry out refrigerant recovery operation, then according to the received temperature values sent by temperature sensors, when the difference value between the indoor environment temperature and the temperature of the indoor heat exchanger is smaller than a first temperature threshold value, and the temperature difference value of the outdoor environment temperature and the temperature of the air return pipe is smaller than a second temperature threshold value, the controller sendsa prompt information that recycling of the refrigerant is completed.

The invention discloses an air circulation system for a printing machine. The air circulation system comprises n printing color cells which are arranged in parallel, wherein n is larger than or equal to 2. Each printing color cell comprises a printing drying channel, a color set air supply draught fan, an exhaust valve and an air return valve, wherein an inlet of the printing drying channel communicates with an outlet of the color cell air supply draught fan. An outlet of the printing drying channel of each printing color cell communicates with a main exhaust pipe through the corresponding exhaust valve, and the outlet of the printing drying channel of each printing color cell communicates with a main air return pipe through the corresponding air return valve. An inlet of the color cell air supply draught fan of each printing color cell communicates with the main air return pipe, and an outlet of the main exhaust pipe communicates with an inlet of a main exhaust draught fan. An outlet of the main exhaust draught fan is led to a waste gas treatment device, and a certain number of exhaust valves are opened for controlling the air extracting amount of the main exhaust draught fan. By means of the air circulation system for the printing machine, waste gas of the printing color cells large in ink feeding amount can be directly discharged, waste gas of the printing color cells small in ink feeding amount enters the main air return pipe to be cycled, the waste gas treatment efficiency is improved, and the waste gas treatment cost is reduced.

The invention discloses an intelligent negative pressure control aspirator applied to a dental department. The intelligent negative pressure control aspirator comprises a frequency converter, a fan, a water-gas separator and a negative pressure sensor, wherein one end of the frequency converter is connected with a dental treatment machine to receive negative pressure demand information, the other end of the frequency converter is connected with the fan to start the fan according to the negative pressure demand information and control the different rotating speeds generated by the fan; the fan can realize different negative pressure aspiration forces through the generated different rotating speeds so as to perform water-gas separation; one end of the water-gas separator is connected with a water-gas pipeline of the dental treatment machine, the other end of the water-gas separator is connected with a waste gas exhaust pipeline and a waste water drain pipeline, the water-gas separator aspirates and separate waste gas and waste water in the dental treatment machine through negative pressure aspiration forces generated by the fan, and then exhausts the waste gas and waste water through the waste gas exhaust pipeline and the waste water exhaust pipeline; one end of the negative pressure sensor is connected with the fan and used for sensing the negative pressure aspiration forces generated by the rotation of the fan, and the other end of the negative-pressure sensor is connected with the frequency converter and is used for feeding back the sensed negative pressure aspiration forces to the frequency converter and used for feeding back the sensed negative pressure aspiration forces to the frequency converter and controlling the rotating speed of the fan through the frequency converter.

The invention relates to an ignition device with controllable energy, pulse width and frequency. The ignition device comprises an igniter and a control circuit thereof, wherein the igniter comprises wires, electrodes, an electrode fixing metal shell, a flange metal shell, a sealing ring and single-hole ceramic tubes, and the control circuit comprises a low-voltage unit, a transformer unit, a current-limiting resistor, a voltage measuring unit and a current measuring unit. The low-voltage unit comprises a direct-current power supply, a power switch and a high-speed switch, the power switch, thedirect-current power supply, the high-speed switch and the input end of the transformer unit form a series loop, the output end of the transformer unit, the current-limiting resistor, the igniter andthe current measuring unit form a series loop, and the overall two ends of the igniter and the current measuring unit are connected in parallel with the voltage measuring unit. Compared with the prior art, the ignition device has the advantages of adjustable ignition energy, pulse width and frequency, wide working range and the like.

The invention relates to a control method for a refrigerating system and the refrigerating system. The refrigerating system comprises a compressor, a plurality of air suction pressure switches which are arranged at intervals and correspond to different air suction pressures are arranged on an air suction pipe of the compressor, and when the refrigerating system is in a refrigerating mode, the control method comprises the steps that on-off signals of multiple air suction pressure switches are obtained; based on the on-off signal of the air suction pressure switch, a preset air suction pressure interval where the air suction pressure of the compressor falls is determined; and the operation frequency of the compressor is controlled based on the falling preset suction pressure interval. By the adoption of the control method for the refrigerating system, the refrigerating system can conveniently control the operation frequency of the compressor based on the preset suction pressure interval where the suction pressure of the compressor falls when the refrigerating system operates in the refrigerating mode, the control precision is high, and the control cost is low.

The invention discloses an air conditioner operation control method and device. The air conditioner operation control method comprises the step of circularly executing the following winding switchingcontrol processes: the temperature difference between the real-time indoor temperature and an indoor temperature target value is calculated, and the real-time indoor temperature difference is obtainedand compared with a first set indoor temperature difference threshold; if the real-time indoor temperature difference is not less than the first set indoor temperature difference threshold, windingsof a compressor are controlled to be connected in a triangle mode; and if the real-time indoor temperature difference is less than the first set indoor temperature difference threshold, the windings of the compressor are controlled to be connected in a star-shape mode. By applying the air conditioner operation control method, overall operation performance of an air conditioner can be improved.

The invention discloses an air conditioner operation control method and device. The air conditioner operation control method comprises the step of circularly executing the following winding switchingcontrol processes: the temperature difference between the real-time indoor temperature and an indoor temperature target value is calculated, and the real-time indoor temperature difference is obtainedand compared with a first set indoor temperature difference threshold; if the real-time indoor temperature difference is not less than the first set indoor temperature difference threshold, windingsof a compressor are controlled to be connected in a triangle mode; and if the real-time indoor temperature difference is less than the first set indoor temperature difference threshold, the windings of the compressor are controlled to be connected in a star-shape mode, and the operation rotating speed of an indoor fan is adjusted based on the real-time indoor temperature difference while the windings of the compressor are controlled to be connected in the star-shape mode. By applying the air conditioner operation control method, overall operation performance of an air conditioner can be improved.

The invention discloses an HBT structure with controllable working frequency in the RF field, comprising a high-concentration P-type impurity buried layer injected between a P-type substrate and a collector region. By injecting high-concentration P-type impurity in an npn-type HBT device, the invention leads a longitudinal electrical filed in the device and realizes control of voltage on working frequency by the way that collector voltage controls the electrical field.

The invention discloses an air conditioner operation control method and device. The air conditioner operation control method comprises the step of circularly executing the following winding switchingcontrol processes: the temperature difference between the real-time indoor temperature and an indoor temperature target value is calculated, and the real-time indoor temperature difference is obtainedand compared with a first set indoor temperature difference threshold; if the real-time indoor temperature difference is not less than the first set indoor temperature difference threshold, windingsof a compressor are controlled to be connected in a triangle mode; and if the real-time indoor temperature difference is less than the first set indoor temperature difference threshold, the windings of the compressor are controlled to be connected in a star-shape mode, and the operation rotating speed of an indoor fan is adjusted based on the real-time indoor humidity while the windings of the compressor are controlled to be connected in the star-shape mode. By applying the air conditioner operation control method, overall operation performance of an air conditioner can be improved.

The invention provides a high-pressure protection control method and device, an air conditioner and a computer readable storage medium. The control method comprises the steps that the high-pressure pressure Pd of a compressor is detected in real time, when it is detected that the high-pressure pressure Pd meets a preset condition, a high-pressure pressure control mode is entered, and the preset condition is that Pd is larger than or equal to Pd '; and according to the high-pressure pressure control mode, the frequency reduction amplitude delta F of the compressor is adjusted according to the high-pressure pressure difference Pd and / or the high-pressure change rate Vt, and the operation frequency of the compressor is reduced, wherein delta Pd is equal to the difference of Pdm and Pd, Pdm is the high-pressure pressure upper limit of the compressor, Pd' is a preset limit value, Pd' is smaller than Pdm, and the high-pressure change rate Vt is the change rate of the high-pressure pressure Pd. Whether the compressor enters the high-pressure pressure control mode or not is judged according to the high-pressure pressure Pd, then the operation frequency reduction amplitude delta F of the compressor is adjusted according to the high-pressure pressure difference delta Pd and / or the high-pressure change rate Vt, the operation frequency of the compressor is effectively controlled, and the situation that when starting is conducted in the high-temperature environment, the high pressure rises excessively, high-pressure protection is excited, and consequently shutdown is caused is avoided.

The invention discloses an evaporative cooling air conditioner and a control method for a cooling medium driving pump body thereof. The method comprises the steps that S1, the dry bulb temperature Td1and the relative humidity RH1 of outdoor cold air are read; S2, on the basis of the dry-bulb temperature Td1 and the relative humidity RH1, the inlet air wet bulb temperature TW1 and the moisture content d1 are calculated; S3, the theoretical optimal moisture content d2 is calculated according to the inlet air wet bulb temperature TW1 and the optimal relative humidity RH; S4, the amount mw of a cooling medium to be sprayed is calculated according to the moisture content d1, the theoretical optimal moisture content d2 and the rotating speed fn of a fan on the outdoor side; S5, the spraying pressure P1 required by spraying is converted according to the amount mw of the cooling medium; and S6, the operation frequency of the cooling medium driving pump body is adjusted according to the spraying pressure P1 until the pressure in a cooling medium conveying pipeline in the evaporative cooling air conditioner reaches the required spraying pressure P1. According to the control method, the spraying amount of the cooling medium can be controlled according to the outdoor cold air parameters, the spraying efficiency is improved, and the resource waste of the cooling medium and electric energyconsumption are reduced.

The invention discloses an electronic ballast. The electronic ballast comprises a square-wave generator, a transformer, a resonant circuit, and at least one control driving circuit, wherein the square-wave generator comprises a plurality of switch elements, the switch elements achieve breakover alternately and are used for converting direct current input voltage into square-wave alternating voltage and outputting the square-wave alternating voltage, the transformer comprises a drive winding, a plurality of control windings, and as least one induction winding, the drive winding, the control windings and the at lease one induction winding are mutually coupled, the plurality of the control windings are electrically connected with control ends of the plurality of switch elements respectively to control the plurality of switch elements to achieve breakover alternately, the resonant circuit and the drive winding form a resonant loop, the resonant circuit is electrically connected with an output end of the square-wave generator to drive a luminous element, and the at least one control drive circuit is connected with two ends of the induction winding in parallel and is used for receiving a control signal to control voltages of the two ends of the induction winding to control breakover time of at least one switch element. The invention provides the electronic ballast which is controllable in working frequency to stabilize working current or working power of the luminous element.

The invention discloses a metasurface switch filter based on vanadium dioxide and graphene, and belongs to the technical field of electromagnetic functional devices. The filter comprises a dielectric plate, a graphene layer located on the upper layer of the dielectric plate, a local electromagnetic field enhancement metal structure located on the upper layer of the graphene layer, a dielectric material bottom plate formed below the dielectric plate, and a periodic electric heating device. A resistance wire can be heated through external voltage, so that the conductivity of vanadium dioxide is changed, metasurface switch filtering is achieved, meanwhile, the Fermi level of graphene can be changed through bias voltage, and filtering frequency band fine tuning control can be achieved. Under the normal temperature state, a passband with the average transmittance of 90% is formed in the frequency band of 32 THz-45.7 THz, and under the power-on condition, a stop band with the resonance center frequency of 42.7 THz and the bandwidth of 6.3 THz is formed in the frequency band of 39.4 THz-45.7 THz.

The invention discloses cement deblocking equipment for building monitoring. The cement deblocking equipment structurally comprises a dust separating device, a cement block feeding hopper, a control panel, a deblocking main motor box, a control button, a slag outlet, a main machine body and bottom supporting legs; the bottom supporting legs are arranged at the bottom of the main machine body, thefour bottom supporting legs are arranged in total, and the bottom supporting legs are fixedly connected with the main machine body through welding; and the slag outlet is formed in the front part of the main machine body, and the cutting inclined angle of the slag outlet is 35 degrees, the width of the slag outlet is 35-45 centimeters, and the control panel is arranged above the slag outlet. According to the equipment, the separated dust can be effectively prevented from entering the air again, a gap working mode is used, so that the energy consumption of the equipment is effectively reduced,meanwhile, a large amount of water resources can be saved, the economic and reliability of the equipment are effectively improved, the working environment can be effectively protected against being polluted during working, and the use safety is improved.

The invention relates to the technical field of compressors, in particular to a control method and device for frequency fluctuation of an air conditioner compressor. The problem of how to control the working frequency of the air conditioner at the frequency reduction triggering edge is solved. In order to solve the problem, the embodiment of the invention provides the control method for the frequency fluctuation of the compressor of the air conditioner, and the control method comprises the following steps: detecting the working state of the compressor to obtain a state detection result; changing the working frequency of the compressor according to the state detection result; and changing the change rate of the working frequency according to the change amplitude of the working frequency.

The invention discloses a biomass particle temperature-increasing and freeze-proofing system for a heliogreenhouse. The system comprises a fuel feeding machine, a combustion machine and a heat exchange device, and the fuel feeding machine, the combustion machine and the heat exchange device are integrally formed. According to the system, feeding, air blowing and air inducing equipment can be adjusted, and heat can be sufficiently collected and diffused under the condition of low energy consumption; hot air collection and circulation with small-load combustion, large-area heat exchange, multi-point-location collection and full-coverage circulation is achieved so that heat dissipated by combustion, exchange and circulation devices can all be collected into a circulating system and quickly diffused to all directions of the heliogreenhouse; the utilization rate of the heat is effectively increased, the loss amount of the heat is reduced, a new way for standardized and routinized application of biomass particle fuel in temperature-increasing and freeze-proofing procedures of the heliogreenhouse is put forward, organic combination of ecology, environmental protection and circulation of modern facility agriculture is achieved, and the advancement level takes the lead in China.