Air conditioner and compressor protection circuit thereof
First Claim
1. A compressor protection circuit, comprising:
- a current sampling module, a reference voltage generating module, a voltage comparison module, and an intelligent power module, the current sampling module sampling a phase current of the compressor and outputting a corresponding sampling voltage signal to a first input end of the voltage comparison module, the reference voltage generating module outputting a reference voltage signal to a second input end of the voltage comparison module, the voltage comparison module comparing the sampling voltage signal with the reference voltage signal;
the intelligent power module controlling a working condition of the compressor according to a driving signal outputted by a signal processing circuit, when the intelligent power module shutting off the output, the intelligent power module outputting a fault protecting signal simultaneously, so that the signal processing circuit stopping outputting the driving signal;
the compressor protection circuit further comprising a signal latching module;
an output end of the voltage comparison module being connected with an input end of the signal latching module, an output end of the signal latching module being connected with a testing port for protecting trigger voltage of the intelligent power module, a latching-controlling end of the signal latching module being connected with the signal processing circuit;
when the sampling voltage signal being higher than the reference voltage signal, the voltage comparison module outputting an overcurrent level signal to the signal latching module, the signal latching module latching and outputting the overcurrent level signal to the intelligent power module continuously according to the overcurrent level signal, so that the intelligent power module shutting off the output of a phase current;
when the signal processing circuit outputting a latching cancel signal to the signal latching module, the signal latching module outputting a conventional level signal to the intelligent power module according to the latching cancel signal, the intelligent power module driving the compressor to operate according to the conventional level signal and a driving signal outputted by the signal processing circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
An air conditioner and a compressor protection circuit thereof are provided. When overcurrent occurs in a phase current of a compressor, an overcurrent level signal is output by a voltage comparison module, and is latched and output to an intelligent power module by a signal latching module, and the intelligent power module shuts off the output of the phase current according to the overcurrent level signal, so as to achieve the overcurrent protection of the compressor; and subsequently, a conventional level signal is output to the signal latching module by the voltage comparison module, the signal latching module keeps outputting the overcurrent level signal, and outputs the conventional level signal until a latching cancel signal output by a signal processing circuit is received, so that the intelligent power module starts the output of the phase current, thereby enabling the compressor to normally operate.
19 Citations
20 Claims
-
1. A compressor protection circuit, comprising:
- a current sampling module, a reference voltage generating module, a voltage comparison module, and an intelligent power module, the current sampling module sampling a phase current of the compressor and outputting a corresponding sampling voltage signal to a first input end of the voltage comparison module, the reference voltage generating module outputting a reference voltage signal to a second input end of the voltage comparison module, the voltage comparison module comparing the sampling voltage signal with the reference voltage signal;
the intelligent power module controlling a working condition of the compressor according to a driving signal outputted by a signal processing circuit, when the intelligent power module shutting off the output, the intelligent power module outputting a fault protecting signal simultaneously, so that the signal processing circuit stopping outputting the driving signal;
the compressor protection circuit further comprising a signal latching module;an output end of the voltage comparison module being connected with an input end of the signal latching module, an output end of the signal latching module being connected with a testing port for protecting trigger voltage of the intelligent power module, a latching-controlling end of the signal latching module being connected with the signal processing circuit;
when the sampling voltage signal being higher than the reference voltage signal, the voltage comparison module outputting an overcurrent level signal to the signal latching module, the signal latching module latching and outputting the overcurrent level signal to the intelligent power module continuously according to the overcurrent level signal, so that the intelligent power module shutting off the output of a phase current;
when the signal processing circuit outputting a latching cancel signal to the signal latching module, the signal latching module outputting a conventional level signal to the intelligent power module according to the latching cancel signal, the intelligent power module driving the compressor to operate according to the conventional level signal and a driving signal outputted by the signal processing circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a current sampling module, a reference voltage generating module, a voltage comparison module, and an intelligent power module, the current sampling module sampling a phase current of the compressor and outputting a corresponding sampling voltage signal to a first input end of the voltage comparison module, the reference voltage generating module outputting a reference voltage signal to a second input end of the voltage comparison module, the voltage comparison module comparing the sampling voltage signal with the reference voltage signal;
-
11. An air conditioner, comprising a signal processing circuit and a compressor, the air conditioner further comprising a compressor protection circuit, and the compressor protection circuit comprising a current sampling module, a reference voltage generating module, a voltage comparison module, an intelligent power module, a signal latching module;
-
the current sampling module sampling a phase current of the compressor and outputting a corresponding sampling voltage signal to a first input end of the voltage comparison module, the reference voltage generating module outputting a reference voltage signal to a second input end of the voltage comparison module, the voltage comparison module comparing the sampling voltage signal with the reference voltage signal; the intelligent power module controlling a working condition of the compressor according to a driving signal outputted by a signal processing circuit, when the intelligent power module shutting off the output, the intelligent power module outputting a fault protecting signal simultaneously, so that the signal processing circuit stopping outputting the driving signal; an output end of the voltage comparison module being connected with an input end of the signal latching module, an output end of the signal latching module being connected with a testing port for protecting trigger voltage of the intelligent power module, a latching-controlling end of the signal latching module being connected with the signal processing circuit;
when the sampling voltage signal being higher than the reference voltage signal, the voltage comparison module outputting an overcurrent level signal to the signal latching module, the signal latching module latching and outputting the overcurrent level signal to the intelligent power module continuously according to the overcurrent level signal, so that the intelligent power module shutting off the output of a phase current;when the signal processing circuit outputting a latching cancel signal to the signal latching module, the signal latching module outputting a conventional level signal to the intelligent power module according to the latching cancel signal, the intelligent power module driving the compressor to operate according to the conventional level signal and a driving signal outputted by the signal processing circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification