Method for cooling air-cooled hot and cold water unit in extremely cold environment and heating in extremely hot environment

Abstract

The invention relates to a method for an air-cooled cold and hot water unit for cooling in an extremely cold environment and for heating in an extremely hot environment. Switch the heating mode, 5. Perform the heating work. The invention realizes the switching of the cooling and heating modes of the air-cooled cold and hot water unit by adjusting the four-way reversing valve, and integrates the functions of annual cooling and annual heating into one unit, which can meet the special requirements of customers. The present invention combines the first fixed frequency fan unit, the second fixed frequency fan unit and the variable frequency fan unit with each other, the control of the number of fixed frequency fan units is combined with the control logic of frequency conversion adjustment of the variable frequency fan unit, and cooperates with the air-cooled cooling system. The hot water unit works at a specific temperature, expands the effective operating range of the working temperature of the air-cooled cold and hot water unit of the present invention, and realizes normal cooling with an ambient temperature above 20°C and normal heating with an ambient temperature below 40°C.

Description

technical field [0001] The invention relates to a method for cooling an air-cooled hot and cold water unit in an extremely cold environment and heating in an extremely hot environment, and belongs to the technical field of air conditioners. Background technique [0002] For air-cooled chiller products, when customers have winter cooling needs, the fan frequency conversion method can be used to maintain the high pressure of the unit to ensure the stable operation of the unit; for year-round heating type hot water units, when the customer needs In the transitional season or summer heating, the suction pressure regulating valve can be used to prevent the low pressure from being too high and the power and current from being too large to ensure the stable operation of the unit. [0003] At present, the above functions are realized by two products respectively, and the products cannot be cooled at an ambient temperature of -20°C or heated at an ambient temperature of 40°C, and can...

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Problems solved by technology

[0003] At present, the above functions are realized by the two products respectively, and the products cannot be cooled at the ambient temperature of -20°C or heated at the ambient temperature of 40°C, which cannot meet the special requirements of specific environments. main flaw

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