Service station for refrigeration equipment

Details Service station for refrigeration equipment Service station for refrigeration equipment

1988-10-07

1990-05-08

Tapolcai, William E.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62149, 62292, F25B 4900

Patent

active

RE0332127

ABSTRACT:
Apparatus for service and recharge of refrigeration equipment, with particular application to automotive air conditioning equipment. A vacuum pump, and oil and refrigerant charge containers are housed within a portable enclosure and configured for selective connection by electrically operated solenoid valves to refrigeration equipment under service. The refrigerant and oil containers are carried by a scale which provides electrical outputs signals as a function of weight of refrigerant and oil remaining in the containers. A microprocessor-based controller receives the scale signals and control signals from an operator panel for automatically cycling through vacuum, oil charge and refrigerant charge stages in a programmed mode of operation. The microprocessor-based controller includes facility for operator programming of the vacuum time and oil and refrigerant charge quantities, and for self- or operator-implemented diagnostics. Operating conditions and stages are displayed at all times to the operator.

REFERENCES:
patent: 2425844 (1947-08-01), Spaulding
patent: 2499170 (1950-02-01), Shoemaker
patent: 2746258 (1956-05-01), Hagans
patent: 3076319 (1963-02-01), White
patent: 3695055 (1972-10-01), Bruce
patent: 3785163 (1974-01-01), Wagner
patent: 3813893 (1974-06-01), Gemender et al.
patent: 3873289 (1975-03-01), White
patent: 4245480 (1981-01-01), Saunders
patent: 4261178 (1981-04-01), Cain
patent: 4285206 (1981-08-01), Koser
patent: 4364236 (1982-12-01), Lower et al.
patent: 4513578 (1985-04-01), Proctor et al.

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