Method and apparatus for servicing automotive refrigeration syst

Details Method and apparatus for servicing automotive refrigeration syst Method and apparatus for servicing automotive refrigeration syst

1996-07-03

1998-06-02

Sollecito, John M.

Refrigeration

Processes

Assembling, charging, or repairing of refrigeration producer

62149, 62292, F25B 4500

Patent

active

057585067

ABSTRACT:
A method and apparatus for determining refrigerant density and mass flow rate, and for pressurizing a refrigerant recovery tank while the refrigeration system is being recharged. The mass of a flowing refrigerant is automatically continually determined by reliable static means in a controlled recharging process. Flow-dependent pressure, such as the pressure drop across the orifice, and temperature data are taken from the recharging system and are connected to a data processor which uses the pressure and temperature data to determine the refrigerant density and the mass of the flowing refrigerant that has been used. The pressure of a source of recharging refrigerant can be maintained by withdrawing and heating liquid refrigerant and returning the resulting superheated vapor directly to the source of recharging refrigerant, and recharging operations can proceed during such pressure maintenance.

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