VAPOR-COMPRESSIVE REFRIGERATING CYCLE

Japanese Patent JP3951711

B2

PROBLEM TO BE SOLVED: To detect the leakage of refrigerant in an early stage.
SOLUTION: A logical parameter of a heat dissipating amount iQ in a condenser 22 or a logical heat dissipating temperature difference iΔT is compared with a parameter with respect to the actual heat dissipating amount Q in the condenser 22, or an actual heat dissipating temperature difference (a difference between a condensing temperature and an outdoor air temperature) ΔT. The amount of difference between a logical heat dissipating amount iQ in the condenser 22 and the actual heat dissipating amount Q in the condenser 22 becomes larger than that in a case when a logical refrigerant flow rate iGr is compared with the actual flow rate Gr, or that in a case when a logical changing amount iΔH of a specific enthalpy is compared with the actual changing amount ΔH of the specific enthalpy. Therefore, the decrease of the amount of refrigerant can be detected correctly even when the amount of refrigerant is decreased slightly, compared with that at a time when the normal amount of refrigerant exists in a refrigerating cycle. Accordingly, the leakage of refrigerant can be detected in an early stage.

Takahisa Suzuki
Tatsuo Kadooka
Toshihiro Tahara
Tetsushi Shinoda

JP2002003550A

August 01, 2007

January 10, 2002

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株式会社デンソー

F25B49/02; B60H1/32; F25B49/00; G01M3/00; (IPC1-7): F25B49/02; B60H1/32

JP8014717A
JP5099542A
JP6194014A
JP8121917A

Yoji Ito
Takahiro Miura
Fumihiro Mizuno

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