Refrigeration device and operation method of refrigeration device

Abstract

A refrigeration device enables sufficient warming by means of simple control and in a state of being free from influences of an operation environment. The device has a compressor, a flow path selection part which switches a refrigerant flow path to a first flow path or a second flow path selectively, an outside-of-warehouse heat exchanger, a flow direction restriction part which restricts a refrigerant flow direction relative to the outside-of-warehouse heat exchanger, a liquid receiver and an in-warehouse heat exchanger. Through selection of the first flow path, cooling operation is carried out, and a gaseous refrigerant is provided for the outside-of-warehouse heat exchanger by means of the compressor to give play to the function of a condenser. The in-warehouse heat exchanger is supplied with a liquid refrigerant from the outside-of-warehouse heat exchanger via the liquid receiver through utilization of restriction by the flow direction restriction part to give play to the function of an evaporator. Through selection of the second flow path, warming operation is carried out, and the in-warehouse heat exchanger is supplied with the gaseous refrigerant from the compressor via the liquid receiver to give play to the function of the condenser. The outside-of-warehouse heat exchanger is supplied with the liquid refrigerant from the in-warehouse heat exchanger through utilization of restriction by the flow direction restriction part to give play to the function of the evaporator.

Description

technical field [0001] The present invention relates to a refrigeration device and a method for operating the refrigeration device, in particular to a refrigeration device and a method for operating the refrigeration device capable of temperature-raising operation. Background technique [0002] As a refrigeration device, there is known a device that can perform not only a cooling operation but also a heating operation (see Patent Document 1). [0003] Refrigerators that can perform warm-up operation are mounted on, for example, refrigerated trucks and used to deliver food to convenience stores and the like. In this refrigerated truck, the refrigerating device mounted on it cools the interior when the set interior temperature is lower than the outdoor temperature during delivery, and cools the interior when the set interior temperature is higher than the outdoor temperature. to heat up. [0004] In this way, the temperature in the warehouse can be maintained at a constant t...

AI Technical Summary

Problems solved by technology

Therefore, depending on the operating environment (including the heat load in the refrigerator and the external environment, etc.), the amount of refrigerant circulating in the refrigerant circuit cannot be obtained sufficiently, and the temperature rise may be insufficient.

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