Process for monitoring the refrigerant fill-level in a refrigera

Details Process for monitoring the refrigerant fill-level in a refrigera Process for monitoring the refrigerant fill-level in a refrigera

1995-01-18

1996-10-01

Tanner, Harry B.

Refrigeration

With indicator or tester

62129, F25B 4902

Patent

active

055602134

ABSTRACT:
A process for a refrigeration system having a compressor which divides the refrigerant circuit into a high-pressure side and a low-pressure side measures on the high-pressure side the relative pressure and the temperature at time intervals. Whereupon, using the measured pressure, and on the basis of a refrigerant-specific function, an assigned temperature is determined. By subtracting the measured from the assigned temperature, a supercooling value is determined. The value can be analyzed as a measure of the refrigerant fill-level. At least during an operating phase which is greater than zero, which operating phase is defined by pre-defined operating conditions, for the evaluation of the refrigerant fill-level, a maximum value is used. The maximum value is set at the start of this operating phase to the last determined supercooling value and, in the course of this operating phase, respectively to a newly determined supercooling value in which at the respective instant, the supercooling value is greater than the previous maximum value. This enables the fill-level to be reliably monitored, including for refrigeration systems having a regulated compressor.

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Japanese Patent Abstract No. 55-148611, vol. 5, No. 18 (M-053), Feb. 3, 1981.

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