| 摘要 |
Method and device for regulating the rate of pressure reduction in a pressure-reduction valve for the coolant fluid of a heat-pump cycle. Method for regulating the rate of pressure reduction in a pressure-reduction valve for the liquefied coolant fluid of a heat-pump cycle, in which this gaseous fluid is compressed 1, liquefied 3 by exchange with a heating fluid, reduced in pressure 9, vaporised in exchange with a heat source in evaporator elements 14, 15, 16, then returned to the compressor. The pressure-reduction valve is a motorised valve, whose needle is moved using a motor, and the position of the needle 33 is regulated as a function of the difference between the temperatures of the coolant fluid at the intake of the compressor and at the entry of the evaporator (overheating) elements, except if the overheating is less than a minimum, and in this case as a function of the difference in temperature at the hot end of the exchanger between the coolant fluid and the heating fluid. Device for implementation. Application to air conditioning of residential premises. <IMAGE>
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