Temperature controlled service hoses for improved refrigerant charge accuracy

摘要

A method and charging apparatus for adding refrigerant to refrigerant system are provided. The disclosure includes thermally conditioning the interior of the service hoses of a refrigerant recovery unit used to charge refrigerant. The conditioning may be based on one or more temperature reading(s) and/or based on a function and may be achieved by a heater along the length of the hose, recirculating refrigerant, and/or through a parallel line of heated liquid.

主权项

1. A method of adding refrigerant to a refrigerant system, the method comprising:
obtaining a recommended amount of refrigerant for the refrigerant system; obtaining a first temperature reading; conditioning an interior temperature of a service hose according to said first reference temperature; obtaining a second temperature reading and conditioning the interior temperature of the service hose based on the temperature readings differential between the first temperature reading and the second temperature reading; and charging the refrigerant system with the recommended amount of refrigerant.