| 摘要 |
<p>PURPOSE:To simplify the structure of the titled device by a method wherein when time series polyphase clock pulses are generated, while the predetermined reference temperature signals are generated in correspondence to the phases of the clock pulses and a plurality of control signals are generated according to the results of comparison with the output signal of a thermosensor. CONSTITUTION:The thermosensor is provided in a pipe between a four-way valve and an indoor heat exchanger in a heat pump cycle and the output signal (a) of the thermosensor is inputted to a comparator 18. Further, the time series eight phase clock pulses (h-o) generated from a clock pulse generating circuit 20 are inputted to a reference temperature setting circuit 19 and the repetitive reference temperature signal (f) having eight levels is outputted from the circuit 19. Then both of the signals (a) and (f) are compared with each other in the comparator 18 and the output (i) of the comparator is transmitted to a logical processing circuit 21 which allows a thermal histeresis characteristic to generate. In addition, the clock pulses (h-o) from the clock pulse generating circuit 20 are inputted to the circuit 21 so that the plurality of control signals related to the reference temperatures are generated.</p> |
