Refrigerating or heating pump system and compressor condensing unit

Abstract

The invention discloses a refrigerating or heating pump system and a compressor condensing unit. A first refrigerating or heating pump loop is arranged on the refrigerating or heating pump system and is at least composed of a compressor, a condenser, a first liquid storage device, a throttling device and an evaporator which sequentially communicate with one another in series. A second refrigerating or heating pump loop is arranged on the refrigerating or heating pump system. The second refrigerating or heating pump loop and the first refrigerating or heating pump loop share the compressor and also share the condenser or the evaporator. The second refrigerating or heating pump loop is not internally provided with the first liquid storage device or is provided with the first liquid storage device but the first liquid storage device is not located between the condenser and the throttling device in the second refrigerating or heating pump loop. By the adoption of the refrigerating or heating pump system, the refrigerating or heating pump system can operate efficiently and reliably under the special working conditions, and the operating efficiency of the system is improved.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a refrigeration or heat pump system and a compression condensing unit. Background technique [0002] First, in the refrigeration system, if the condensing pressure is too high, the exhaust temperature of the compressor will rise, the compression ratio will increase, the cooling capacity will decrease, the power consumption will increase, the condensing pressure will be too high, and it will easily cause equipment damage accidents. If the condensing pressure is too low, especially in winter, the ambient temperature or cooling water temperature is low, resulting in too low condensing pressure, so that the pressure difference between the front and rear of the thermal expansion valve is too small, and the liquid supply power is insufficient, resulting in refrigerant flowing through the thermal expansion valve. The flow rate decreases sharply, so that the cooling capacity is greatly reduced,...

AI Technical Summary

Problems solved by technology

[0006] Using the above two methods, the energy efficiency ratio of the refrigeration system in the cold season is still low, which is relatively close to that in the warm season or even in summer.

[0007] Second, in the condensing heat recovery refrigeration system, when the heat recovery mode is adopted, as the temperature of the hot water gradually increases, the cooling capacity of the system gradually decreases, which may result in a decrease in user comfort, or an increase in food temperature due to insufficient cooling capacity , so that it is necessary to install a unit with a larger capacity

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