REFRIGERATION APPARATUS FOR TRANSPORT AND METHOD OF IMPROVING HEATING PERFORMANCE OF THE SAME

摘要

PURPOSE: To enhance the heating capacity of a refrigerating system for transport, by starting a condenser flushing mode for making a liquid refrigerant trapped in a condenser to flow to an accumulator through a receiver before starting each heating cycle. CONSTITUTION: Immediately before starting a heating cycle, a receiver 26 is connected to an accumulator 44 in a directly fluid flowing state by using a solenoid valve 78. While the accumulator 44 is connected to the receiver 26, a liquid refrigerant produced from a high-temperature high-pressure gas sent to a condenser 24 during delay time is flushed to make the refrigerant flow to the receiver 26 and, further, to the accumulator 44 based on the compared result of the low pressure in the accumulator 44 with the pressure at the outlet 28 of the receiver 26. Thereafter, the start of an actual heating cycle is delayed by a prescribed period of time and, during the prescribed period of time, the high-temperature gas from a compressor 14 is made to continuously flow to the condenser 24. Consequently, an sufficient amount of liquid refrigerant to obtain a nearly maximum heating capacity is supplied to the accumulator 44 even when the cycle is in a very low temperature state.