Low refrigerant charge detection system for a heat pump

Details Low refrigerant charge detection system for a heat pump Low refrigerant charge detection system for a heat pump

1992-07-13

1993-02-16

Tanner, Harry B.

Refrigeration

With indicator or tester

Condition sensing

62160, F25B 4900

Patent

active

051860147

ABSTRACT:
A low refrigerant charge detector is operatively connected in either the suction or discharge line of a compressor of a heat pump system, wherein the compressor is in turn connected to a reversing valve. The detector includes a pressure sensor connected in one line and transmits pressure readings to a computer. During reversal of the flow of liquid in the system by the reversing value, the time at which the pressure exceeds or drops below a predetermined value is measured. The comparison depends on if the sensor is connected in the suction line or discharge line. If the time exceeds a minimum time, a low charge of refrigerant is indicated.

REFERENCES:
patent: 4167858 (1979-09-01), Kojima et al.
patent: 4220010 (1980-09-01), Mueller et al.
patent: 4265091 (1981-05-01), Kobayashi
patent: 4677830 (1987-07-01), Sumikawa et al.
patent: 4745765 (1988-05-01), Pettitt
patent: 5009074 (1991-04-01), Goubeaux et al.
patent: 5009076 (1991-04-01), Winslow
patent: 5044168 (1991-09-01), Wycoff

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