초록 ▼

A heat pump apparatus is provided with a multiple-constituent refrigerant mixture which includes a major constituent refrigerant which is above 50% by weight of total refrigerant enclosed in the refrigerating circuit provided with a variable frequency compressor, and a minor constituent refrigerant

A heat pump apparatus is provided with a multiple-constituent refrigerant mixture which includes a major constituent refrigerant which is above 50% by weight of total refrigerant enclosed in the refrigerating circuit provided with a variable frequency compressor, and a minor constituent refrigerant which has lower critical pressure than that of the major constituent refrigerant.

대표청구항 ▼

A method for operating a heat pump that includes: a refrigeration circuit comprising and operatively connecting: (a) a variable-r.p.m. compressor; (b) a primary heat exchanger for a heat sink; (c) a capillary tube or expansion valve; and (d) a secondary heat exchanger for a heat source, so as to low

A method for operating a heat pump that includes: a refrigeration circuit comprising and operatively connecting: (a) a variable-r.p.m. compressor; (b) a primary heat exchanger for a heat sink; (c) a capillary tube or expansion valve; and (d) a secondary heat exchanger for a heat source, so as to lower the discharge temperature of the compressor at times when the compressor is being operated at speeds in excess of that at which said compressor would be operated by an electric motor powered directly by alternating electric current of supplied hertz, in comparison with the discharge temperature of the compressor if said heat pump were using a single constituent refrigerant as the refrigeration circuit working fluid, said method comprising: operating said compressor at said speeds in excess, while using a constant-composition multiple-constituent refrigerant as the refrigeration circuit working fluid, said constant composition multiple-constituent refrigerant being one selected from the group consisting of: (i) at least 50 percent by weight of R22, and at least one minor constituent refrigerant selected from the group consisting of R23, R13, R116, SF6, R13 B1, R125, R12, R152a, R124, R142b, RC318, R12B1, R14, R133a and R11; and (ii) at least 50 percent by weight of R12, and at least one minor constituent refrigeraant selected from the group consisting of R13, R116, SF6, R13 B1, R125, R115, R218, R124, R142b, RC 318, R114 and R133a.