Multiple-temperature zone refrigeration circuit and multiple-temperature zone refrigeration device

Abstract

The invention provides a multiple-temperature zone refrigeration circuit and a multiple-temperature zone refrigeration device. The refrigeration circuit comprises a compressor and a condenser which are connected together, and further comprises a first evaporator, a second evaporator, a gas-liquid separator, a first regenerator and a heat exchanger, wherein a first capillary tube and a first regeneration tube which are in mutual heat exchange are arranged inside the first regenerator; an outlet of the condenser is connected with an inlet of the gas-liquid separator; a gas outlet of the gas-liquid separator is connected with a first heat exchange channel of the heat exchanger; the first heat exchange channel is connected with an inlet of the second evaporator through a second capillary tube; a liquid outlet of the gas-liquid separator is connected with the inlet of the second evaporator through the first capillary tube; an outlet of the second evaporator is connected with a second heat exchange channel of the heat exchanger; the outlets of the second heat exchange channel and the second evaporator are connected with the first regeneration tube; and the first regeneration tube is connected with an inlet of the compressor. According to the multiple-temperature zone refrigeration circuit, the energy utilization rate is increased, the refrigeration performance is improved, the refrigeration temperature interval is expanded, and the universality is improved.

Description

technical field [0001] The invention relates to refrigeration equipment, in particular to a multi-temperature zone refrigeration circuit and multi-temperature zone refrigeration equipment. Background technique [0002] At present, refrigeration equipment (refrigerators, freezers, etc.) are widely used in people's daily life. With the continuous improvement of people's living standards, people have higher and higher requirements for food and refrigeration equipment in terms of environmental protection, energy saving, and freshness preservation. Food storage requirements, wine needs to be stored in the temperature zone of 5~20℃, fruits and vegetables should be stored in the temperature zone of 0~8℃, ordinary meat, fish and other products need to be stored in -18℃, and some Special foods need to be stored at ultra-low temperatures. For example, tuna needs to be stored in an environment around -55°C to ensure the deliciousness of its meat. In the prior art, refrigeration equip...

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Problems solved by technology

In the prior art, refrigeration equipment with multi-temperature zone refrigeration function usually adopts cooling capacity distribution and corresponding electronic control strategy to realize multi-temperature zone refrigeration, but in the actual use process, the multi-temperature zone in the prior art On the one hand, the refrigeration equipment increases the heat transfer temperature and the energy utilization rate is low. On the other hand, the control system is cumbersome. During the user's use, it is easy to have a problem of cooling difference or even no cooling at a certain temperature; more importantly, different temperature zones cannot be used. Realize refrigeration with large temperature difference, and the refrigeration temperature range is small

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