Heat exchanger and heat pump circuit

Details Heat exchanger and heat pump circuit Heat exchanger and heat pump circuit

1997-08-04

1999-03-02

Sollecito, John M.

Refrigeration

Reversible, i.e., heat pump

With flow control or compressor details

62260, 62DIG17, F25B 1300

Patent

active

058756442

ABSTRACT:
A heat exchanger and heat pump circuit having an operating subcircuit and a pump down subcircuit each including a liquid line and a heat transfer tube. The heat transfer tube of the pump down subcircuit surrounds the liquid line of the operating subcircuit. During the heating cycle, the heat pump circuit circulates refrigerant through both subcircuits to abstract heat from the heat source/sink. However, during the cooling cycle, the heat pump circuit circulates refrigerant only through the operating subcircuit. Also during the cooling cycle, the heat pump circuit places the pump down subcircuit at low pressure to thermally insulate the operating subcircuit liquid line.

REFERENCES:
patent: 1554654 (1925-09-01), Prisner
patent: 1597618 (1926-08-01), Prisner
patent: 3882937 (1975-05-01), Robinson
patent: 4171721 (1979-10-01), Movick
patent: 4173865 (1979-11-01), Sawyer
patent: 4212156 (1980-07-01), Nagase
patent: 4255936 (1981-03-01), Cochran
patent: 4286651 (1981-09-01), Steiger et al.
patent: 4325228 (1982-04-01), Wolf
patent: 4671351 (1987-06-01), Rappe
patent: 4714108 (1987-12-01), Barry
patent: 4716741 (1988-01-01), Bednarek

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