Refrigeration – Reversible – i.e. – heat pump
Patent
1988-01-27
1989-01-31
King, Lloyd L.
Refrigeration
Reversible, i.e., heat pump
62 84, 62194, 62470, 62471, F25B 1300
Patent
active
048007366
ABSTRACT:
A heat pump having reversible heating and cooling cycles for circulating a refrigerant therein for adding heat to and removing heat from space, the heat pump comprising a heat exchanger for adding heat to and removing heat from air passed over it, a condenser/evaporator coil for removing heat from or adding heat to refrigerant; and a compressor for circulating refrigerant. The heat pump further comprises a conduit for conducting refrigerant to the heat exchanger during the heating cycle and conducting refrigerant from the heat exchanger during the cooling cycle. A first line supplies the conduit with refrigerant during the heating cycle and is smaller than the conduit so that the refrigerant decelerates, causing oil that may have been picked up by the refrigerant to drop out. A second line also conducts refrigerant from the conduit during the cooling cycle. This line is larger than the conduit so that the refrigerant decelerates during, causing oil that may have been picked up by the refrigerant to drop out. A oil scavenging capillary returns oil removed in the conduit to the compressor.
REFERENCES:
patent: 2749723 (1956-06-01), Webber
patent: 3276215 (1966-10-01), McDonell
patent: 3636723 (1972-01-01), Kramer
patent: 4429544 (1984-02-01), McCarty
patent: 4563879 (1986-01-01), Hama et al.
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