Transport refrigeration system having means for enhancing the ca

Details Transport refrigeration system having means for enhancing the ca Transport refrigeration system having means for enhancing the ca

1991-02-21

1991-10-15

Wayner, William E.

Refrigeration

Processes

Compressing, condensing and evaporating

62174, 623244, F25B 1300

Patent

active

050563246

ABSTRACT:
A transport refrigeration system which includes a compressor, a condenser, a receiver, an evaporator, an accumulator, and a control valve having cooling and heating output ports which are alternatively connected to first or second refrigerant circuits to initiate cooling and heating cycles, respectively. The heating capacity of a commanded heating cycle is enhanced prior to switching to the heating cycle by connecting the outlet of the receiver to the second refrigerant circuit while maintaining the control valve cooling port active in the first refrigerant circuit for a predetermined time delay. This forces liquid refrigerant in the condenser to flow into the receiver and then into the second refrigerant circuit, making additional liquid refrigerant available to the heating cycle, which is initiated at the end of the predetermined time delay, without introducing liquid refrigerated directly into the accumulator.

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patent: 4437317 (1984-03-01), Ibrahim
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patent: 4602485 (1986-07-01), Fujimoto et al.
patent: 4748818 (1988-06-01), Satterness et al.
patent: 4912933 (1990-04-01), Renken

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