45 results about "Air conditioner inverter" patented technology

The invention relates to an electric current reconstructing and over-modulating device of an air conditioning frequency converter, which is characterized by comprising an electric current reconstructing device, a vector controller, a pulse width modulation (PWM) frequency converter, a direct current side electric current sensor, an electric motor and a coder. The electric current reconstructing device comprises an SVPWM over-modulating module, a pulse width modulation (PWM) signal adjusting module, a direct current sampling module and an alternating current reconstructing module. An electric current reconstructing and over modulating method of the air conditioning frequency converter comprises the steps: sampling the direct current side electric current of the pulse width modulation (PWM)frequency converter at twice by the electric current reconstructing device; counting an approach vector switch action time which meets a minimum sampling time request according to the two sampling values; sampling the direct current side electric current at twice again in the approach vector switch action time; and reconstructing three phase alternating current according to the sampling values ofthe direct current at twice, thereby realizing the closed loop control of the pulse width modulation (PWM) frequency converter. The modulating method can be widely used for the field in reconstructing and over-modulating the electric current of the frequency converter in air conditionings and electric vehicles.

The invention discloses a voltage shock protection method for an inverter air conditioner, which comprises the following steps: detecting the DC voltage at the output terminal of the rectifier and the DC current supplied to the IPM module; obtaining the rectification coefficient of the rectifier according to the DC current; and obtaining the rectification coefficient according to the DC voltage and the rectification coefficient Acquiring the current AC voltage of the AC power, and judging that the current AC voltage is less than or equal to the first preset voltage, controlling the controllable switch to be disconnected so that the protection device is connected in series between one end of the AC power and the first input end of the rectifier, and controlling the compressor is down. The anti-voltage shock protection method can control the compressor to shut down when the voltage of the input alternating current is too low, avoiding the excessive charging current of the capacitor caused by the instantaneous and sharp rise of the alternating current voltage, which will cause the electronic components in the inverter air conditioner to be damaged by the large current . The invention also discloses an anti-voltage impact protection device of an inverter air conditioner and an inverter air conditioner.

The present invention relates to an inverter device of an air conditioner, which has a substrate, a plurality of boosting circuits, and a control mechanism. The substrate is installed so that cooling air flows through the lower surface side thereof. The booster circuits are respectively mounted on the lower surface side of the substrate. The control mechanism switches the number of driven booster circuits according to the size of the load.

The invention discloses a controller for a variable frequency air conditioner participating in frequency modulation of a power system by considering frequency modulation excitation signals. A comfortlevel setting module outputs set comfort level data to a historical data storage module and a central processing module; an excitation signal receiving module outputs an excitation signal to the historical data storage module and the central processing module; a frequency measurement module of a frequency converter outputs data to the historical data storage module and the central processing module; the historical data storage module outputs the historical data to a display screen module; the display screen module displays the data; the central processing module processes the set comfort leveldata, the frequency modulation excitation signal data and the real-time frequency data of the frequency converter to obtain a control signal, and transmits the control signal to the frequency converter of the air conditioner. The controller for the variable frequency air conditioner participating in frequency modulation of the power system by considering frequency modulation excitation signals can receive frequency modulation excitation signals sent by a power grid company, enables the variable frequency air conditioner to participate in frequency modulation response of a power system, reduces the pressure of frequency modulation at the power generation side, reduces resource waste caused by frequency modulation of a frequency modulation unit, and achieves the purposes of energy conservation and emission reduction.

The pressure control system for the frequency conversion compressor in the frequency conversion air conditioner, the output end of the fixed speed compressor is connected to the high pressure switch through the first check valve, the output end of the frequency conversion compressor is connected to the high pressure switch through the oil separator and the second check valve in turn, and the high pressure switch Connect the a-side of the four-way valve, the b-side of the four-way valve is connected to the condenser, the condenser is connected to the electronic expansion valve and the third capillary, the electronic expansion valve and the third capillary are connected to the liquid storage tank, and the d-side of the four-way valve is connected to the fixed-speed compressor and the input end of the variable frequency compressor, the c-end of the four-way valve is connected to the evaporator and the liquid storage tank in turn, the c-end of the four-way valve is also connected to the first capillary and the electromagnetic valve for refrigeration in turn, and the other end of the electromagnetic valve for refrigeration is connected to the constant speed The compressor is connected to the input end of the variable frequency compressor, the d end of the four-way valve is connected to the second capillary and the solenoid valve for heating in turn, the solenoid valve for heating is connected to the b end of the four-way valve and one end of the electronic expansion valve, and the other two ends of the electronic expansion valve The terminals are respectively connected to the liquid storage tank and the condenser. The invention reduces the start and stop of the compressor and prolongs the service life.

The invention relates to the technical field of frequency converters, and discloses a current reconstruction overmodulation device for air conditioner frequency converters, which includes a device outer box, a heat dissipation mechanism is provided inside the device outer box, and the bottom of the device outer box is fixed and installed There are four supporting legs, and the bottoms of the four supporting legs are all provided with damping mechanisms, and the inside of the outer box of the device is fixedly installed with a modulating assembly. The current reconstruction overmodulation device of the air conditioner frequency converter can focus on the heat dissipation of the structure whose internal temperature rises in the modulation component by setting a heat dissipation mechanism, so as to avoid the impact on other structures caused by the excessive temperature of a certain structure inside the modulation component. Furthermore, the effect of heat dissipation and cooling on the modulation components is greatly improved. By setting the shock absorbing mechanism, the impact of the vibration generated by the internal structure of the frequency converter on the modulation components can be reduced, and the internal structure of the modulation components is avoided due to vibration. The stability of the modulation component is improved.

The invention discloses a shutdown method of a variable frequency air conditioner. An indoor machine or an outdoor machine sends out a shutdown signal, and the outdoor machine receives the shutdown signal and analyzes a shutdown reason. When the shutdown reason is an emergency shutdown situation in an accidental shutdown, immediate shutdown processing is carried out.When the shutdown reason is a non-urgent shutdown situation in the accidental shutdown, underclocking shutdown processing is carried out. When the shutdown reason is a normal shutdown, the underlocking shutdown processing is carried out. By distinguishing the shutdown reasons of a variable frequency air conditioner and adopting different shutdown modes to different shutdown reasons, emergence of situations of high-frequency shutdown of the variable frequency air conditioner is greatly reduced, service life of the variable frequency air conditioner is further improved, immediate shutdown is conducted when urgent shutdown is needed, and using safety is improved. The invention further discloses a variable frequency air conditioner, a shutdown reason analyzing module is added in the air conditioning system to analyze the shutdown reason, and adopts different shutdown modes according to different shutdown reasons, the high-frequency shutdown is reduced, and service life of the air conditioner is improved.