FREEZER UNIT

Japanese Patent JP2015140980

A

PROBLEM TO BE SOLVED: To provide a freezer unit such that the constitution is simple and the circulation composition of a non-azeotropic refrigerant mixture can be accurately known.SOLUTION: Based upon a sealed composition α of a non-azeotropic refrigerant mixture, a gas composition αof the non-azeotropic refrigerant mixture flowing through a refrigerant circuit 10 is assumed. Based upon the gas composition α, respective refrigerant temperatures Tand T, and Tand Tat an intake and an outlet of a high pressure-side flow passage 27 of an internal heat exchanger 15 and an intake and outlet of a low pressure-side flow passage 29, and respective refrigerant pressures Pand P, enthalpy change amounts (h-h) and (h-h) of the high pressure-side flow passage 27 and low pressure-side flow passage 29 are calculated respectively, and the gas composition αwhen the difference ((h-h)-(h-h)) between those calculated enthalpy change amounts is substantially equal to heating value (Q/G) discharged from the low pressure-side flow passage 29 is defined as an actual circulation composition α'.

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IIDAKA MASAYUKI
TOMOCHIKA KAZUYOSHI

JP2014014608A

August 03, 2015

January 29, 2014

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PANASONIC CORP

F25B1/00; F25B40/00; F28D7/10

Patent Business Corporation Kushibuchi International Patent Office

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