Control device for refrigerated display case

Refrigeration – Time or program actuator – Defrosting

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Details

62197, 62199, 62278, 62256, F25D 2100, F25B 4700

Patent

active

046915273

ABSTRACT:
A refrigerated display case with multiple air curtains and a refrigerating apparatus for refrigerating circulating air. The refrigerating apparatus includes a compressor, a condenser and two evaporators. The suction sides of both evaporators are connected with one another by a first passage line which includes first and second compression device with check valves in series, this line being connected to the compressor through valve devices. The discharge sides of both evaporators are also connected with one another by a second passage line which includes a pair of check valves, this second line being connected to the compressor through valve devices, respectively. The first and second passage lines are connected with one another and connected to the condenser through a valve device whereby both evaporators are parallel or serial connected with one another due to operation of the valve devices to accomplish the refrigerating mode or refrigerating and defrosting mode of the refrigerating means. A control apparatus is also provided to control the operation of the valve devices. The operating mode of the refrigerating apparatus is controlled to reduce the large load initially put on the refrigerating apparatus.

REFERENCES:
patent: 3122892 (1964-03-01), Beckwith
patent: 3465536 (1969-09-01), Vogel et al.
patent: 4122688 (1978-10-01), Mochizuki et al.

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