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AssigneeMitsubishi Electric Corporation
InventorsTetsuya Yamashita, Akihiro Nishida, Hirokazu Taniguchi, Takashi Okazaki, Yoshihiro Sumida, Masato Yosomiya, Kazuhiko Shiraishi
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Disclosed is a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant and a refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant circulates through a refrigeration cycle so as to avoid occurrence of negative pressure in a low-pressure circuit. The non-azeotropic refrigerant mixture is characterized in that a mixing ratio of a high-boiling refrigerant and a low-boiling refrigerant is determined so that a saturated vapor line where pressure is 0.00 MPa is not higher than −45° C. in a low-pressure circuit formed between the decompressor to the compressor.
A non-azeotropic refrigerant mixture which circulates through a refrigeration cycle configured at least by a compressor, a condenser, a decompressor and an evaporator, the non-azeotropic refrigerant mixture consisting of tetrafluoropropane as a high-boiling refrigerant and a or some low-boiling refrigerant(s) mixed together at a predetermined mixing ratio, wherein the mixing ratio of said high-boiling refrigerant and said low-boiling refrigerant is determined so that a saturated vapor line where a gauge pressure that suppresses refrigerant decomposition due to incorporation of the fluid is 0.00 MPa is not higher than −45° C. in a low-pressure circuit formed between said decompressor and said compressor.
A refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture circulates through a refrigeration cycle configured by a compressor, a condenser, a first decompressor, a vapor/liquid separator, a second decompressor and an evaporator which are connected sequentially, the non-azeotropic refrigerant mixture consisting of a high-boiling refrigerant and a or some low-boiling refrigerant(s) mixed at a predetermined mixing ratio, the apparatus comprising a controller for variably adjusting a pressure in said vapor/liquid separator by controlling opening of said first decompressor and said second decompressor, and determining the mixing ratio of said high-boiling refrigerant and said low-boiling refrigerant of said non-azeotropic refrigerant mixture so that a saturated vapor line where a gauge pressure that suppresses refrigerant decomposition due to incorporation of the fluid is 0.00 MPa is not to be higher than −45° C. in a low-pressure circuit formed between said second decompressor and said compressor.
(canceled)
A refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture circulates through a refrigeration cycle configured by a compressor, a condenser, a liquid receiver, a decompressor, an evaporator and a low-pressure vapor/liquid separator which are connected sequentially, the non-azeotropic refrigerant mixture consisting of a high-boiling refrigerant and a or some low-boiling refrigerant(s) mixed together at a predetermined mixing ratio, the apparatus comprising a controller for adjusting a composition ratio of the non-azeotropic refrigerant mixture stored in the low-pressure vapor/liquid separator and the composition ratio of the non-azeotropic refrigerant mixture made to flow out of the low-pressure vapor/liquid separator by controlling opening of the decompressor, and determining the mixing ratio of the high-boiling refrigerant and the low-boiling refrigerant of the non-azeotropic refrigerant mixture so that a saturated vapor line of the non-azeotropic refrigerant mixture where a gauge pressure that suppresses refrigerant decomposition due to incorporation of the fluid is 0.00 MPa is not to be higher than −45° C. in a low-pressure circuit formed between the decompressor and the compressor.
(canceled)
Dependencies are inferred from the claim text.