REFRIGERATION CIRCUIT

摘要

A refrigeration circuit (1a) comprises in the direction of flow of a circulating refrigerant a compressor unit (2) for compressing the refrigerant, a condenser (4), and at least one evaporator (10) having an expansion device (6) connected upstream thereof. The refrigeration circuit (1a) further comprises a subcooling temperature sensor (6) located at an outlet of the condenser (4) for measuring the temperature of refrigerant leaving the condenser (4), a control unit (12) functionally connected to the subcooling temperature sensor (6) and configured for detecting a leak in the refrigeration circuit (1a) based on the refrigerant temperature measured by the subcooling temperature sensor (6). The condenser (4) comprises a liquefying portion (4a) configured for at least partially liquefying the refrigerant and a subsequent subcooling portion (4b) configured for subcooling and storing liquefied refrigerant, and the outlet of the condenser (4), particularly the outlet of the subcooling portion (4b), is connected to the expansion device (8) of the at least one evaporator (10) through a receiver-free connection line (7).

主权项

1. A refrigeration circuit comprising in the direction of flow of a circulating refrigerant:
a compressor unit for compressing the refrigerant; a condenser; and at least one evaporator having an expansion device connected upstream thereof; the refrigeration circuit further comprising: a subcooling temperature sensor located at an outlet of the condenser for measuring the temperature of refrigerant leaving the condenser; a control unit functionally connected to the subcooling temperature sensor and configured for detecting a leak in the refrigeration circuit based on the refrigerant temperature measured by the subcooling temperature sensor compared to a predetermined temperature calculated based on (i) at least one temperature measured outside the condenser or (ii) an external value input by an operator; wherein the condenser comprises a liquefying portion configured for at least partially liquefying the refrigerant and a subsequent subcooling portion configured for subcooling and storing liquefied refrigerant; and wherein the outlet of the condenser, particularly the outlet of the subcooling portion, is connected to the expansion device of the at least one evaporator through a receiver-free connection line.