초록 ▼

An optimized position for an economizer shut-off valve, or other method of increasing the volume in an economizer line is disclosed In one embodiment, the economizer shut-off valve is positioned directly downstream of the economizer heat exchanger. In a second embodiment, the valve is positioned ups

An optimized position for an economizer shut-off valve, or other method of increasing the volume in an economizer line is disclosed In one embodiment, the economizer shut-off valve is positioned directly downstream of the economizer heat exchanger. In a second embodiment, the valve is positioned upstream of the economizer expansion valve and the economizer heat exchanger. In a third embodiment, the economizer expansion valve is also provided with an appropriate control such that it can be utilized as the shut-off valve. In the fourth embodiment, additional volume is added to the economizer line. With each of these embodiments, the volume of the economizer line between the compressor and the economizer shut-off valve is relatively large compared to the prior art. Benefits with regard to temperature control, efficiency and capacity increase are achieved by this invention. Moreover, a less expensive shut-off valve can be utilized.

대표청구항 ▼

1. A refrigeration cycle comprising:a compressor having a refrigerant main suction inlet and a discharge outlet; a condensor communicating with said discharge outlet, said condensor passing refrigerant to an economizer tap, and to a main refrigerant flow line, said main refrigerant flow line leading

1. A refrigeration cycle comprising:a compressor having a refrigerant main suction inlet and a discharge outlet; a condensor communicating with said discharge outlet, said condensor passing refrigerant to an economizer tap, and to a main refrigerant flow line, said main refrigerant flow line leading to a primary expansion device, and said tap passing through an economizer expansion device; an economizer heat exchanger positioned on said main flow line upstream of said primary expansion device, said tap also passing through said economizer heat exchanger, said economizer heat exchanger being positioned downstream of said economizer expansion device, said tap communicating with said main flow line upstream of said economizer heat exchanger; an evaporator positioned downstream of said primary expansion device, and, refrigerant passing from said evaporator back to said compressor via the main suction inlet; and an economizer line passing from said economizer heat exchanger back to said compressor via a line entirely separate for the main suction inlet, and a shut-off valve for shutting off flow of refrigerant through said economizer line to said compressor, said shut-off valve being spaced from said compressor by a distance that is more than 10% of the length of said economizer line between said economizer heat exchanger and said compressor.