Starting control circuit of single-phase alternating-current motor, compressor system, and refrigeration equipment

Abstract

The invention discloses a starting control circuit of a single-phase alternating-current motor, a compressor system, and refrigeration equipment. The starting control circuit is composed of a motor starting circuit, a trigger circuit, and a control circuit. The control circuit controls the trigger circuit to output a trigger signal to a controllable switch so as to trigger the controllable switch to be connected when the single-phase alternating-current motor is started; after conduction of the motor starting circuit, the single-phase alternating-current motor is started; after starting of the single-phase alternating-current motor, the control circuit controls the trigger circuit to stop outputting of the trigger signal, so that the controllable switch is turned off and the motor starting circuit is disconnected. Therefore, after starting of the motor, power consumption avoidance of a PTC resistor can be realized by disconnection of the motor starting circuit, so that energy wasting resulted from power consumption caused by the motor starting circuit during working of the motor can be avoided. And thus the power consumption is reduced, the energy efficiency grade is improved, and energy conservation and environment protection can be realized.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a starting control circuit of a single-phase AC motor, a compressor system and a refrigeration device. Background technique [0002] At present, the fixed-speed compressors in most refrigeration equipment are matched with ordinary efficiency starters. When the fixed-speed compressors are running, the PTC (Positive Temperature Coefficient) thermistor inside the starter is always in a energized state. , The power consumption is generally 2-3W, and this part of the power consumption will directly affect the power consumption and energy efficiency level of refrigeration equipment such as refrigerators, and it will also cause a lot of waste of energy over time, making refrigeration equipment not energy-saving and environmentally friendly. [0003] Therefore, it is necessary to improve the power consumption of the motor starter. Contents of the invention [0004] The present i...

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Problems solved by technology

[0002] At present, the fixed-speed compressors in most refrigeration equipment are matched with ordinary efficiency starters. When the fixed-speed compressors are running, the PTC (Positive Temperature Coefficient, positive temperature coefficient) thermistor inside the starter is always energized. , power consumption is generally 2-3W, and this part of power consumption will directly affect the power consumption and energy efficiency level of refrigeration equipment such as refrigerators, and it will also cause a lot of waste of energy over time, making refrigeration equipment not energy-saving and environmentally friendly.

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