Binary refrigeration cycle device

Abstract

This binary refrigeration cycle device has: a low-temperature-side refrigeration cycle provided with a low-temperature-side compressor and a heat-source-side heat exchanger that absorbs heat from an external heat source; a high-temperature-side refrigeration cycle provided with a high-temperature-side compressor and a use-side heat exchanger that supplies heat to the use side; an intermediate heat exchanger for exchanging heat between the refrigerants of the low-temperature-side refrigeration cycle and the high-temperature-side refrigeration cycle; a casing that is loaded with at least the use-side heat exchanger; use-side piping that is loaded in the casing, is connected to the use-side heat exchanger, causes heat exchange and supply to the use side of a use-side fluid flowing through and the refrigerant of the high-temperature-side refrigeration cycle; a bypass pathway that is connected in parallel to the use-side piping and the use-side heat exchanger, and that sends the use-side fluid at the use-side heat exchanger exit side of the use-side piping to the use-side heat exchanger entrance side; and a fluid control means that controls the flow of the use-side fluid flowing within the bypass pathway.

Description

technical field [0001] Embodiments of the present invention relate to a binary refrigeration cycle device. Background technique [0002] In refrigeration cycle devices such as air conditioners and heat pump water heaters, in order to supply high-temperature heat to heat utilization equipment, binary refrigeration cycle devices that have a low-temperature side refrigeration cycle and a high-temperature side refrigeration cycle are sometimes used. [0003] The low-temperature-side refrigeration cycle and the high-temperature-side refrigeration cycle of the binary refrigeration cycle device each have a compressor, an expansion device, and the like, and are connected in a heat-exchangeable manner through an intermediate heat exchanger. Then, the heat drawn by the heat source side heat exchanger as the low temperature side evaporator set on the low temperature side refrigeration cycle is transferred to the high temperature heat through the utilization side heat exchanger as the h...

AI Technical Summary

Problems solved by technology

[0009] The present invention is proposed to solve the above problems. According to the embodiment of the present invention, a binary refrigeration cycle device is provided that solves the problem of the reliability degradation of the compressor, and further solves the problem of the reliability degradation of the refrigeration cycle device.

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