Heat pump unit with built-in water coil and operating method thereof

Abstract

The invention provides a heat pump unit with a built-in water coil and an operation method thereof. The heat pump unit involved in the present invention includes a compressor, a gas-liquid separator, a four-way reversing valve, a water evaporator / condenser, a two-way flow valve group, an air evaporator / condenser, a water coil, a fan, a first electric valve, a second 2. Electric valve (proportional regulating valve), air outlet wet and dry bulb temperature sensor, outlet water temperature sensor, indoor dry and wet bulb temperature sensor, unit controller and chassis. The operation method of the heat pump unit involved in the present invention includes that when there is a cooling load in the room and the water temperature detected by the outlet water temperature sensor is lower than the conversion temperature, the unit does not need to turn on the refrigeration system, the compressor stops running, and the water coil built in the unit is used to provide cooling capacity. Meet the indoor cooling load demand and save energy; when the unit is running in cooling mode and the outlet air temperature is lower than the indoor dew point temperature, the second electric valve is opened in proportion, the water coil releases heat, and the outlet air temperature rises to prevent condensation.

Description

technical field [0001] The invention relates to the field of central air conditioning, in particular to a heat pump unit with a built-in water coil and an operating method thereof. Background technique [0002] The water loop heat pump system is one of the central air-conditioning systems. Its advantage is that it can provide cooling and heating at the same time, and is suitable for large-scale complex buildings with internal and external areas. At the same time, the system layout is simple and flexible, the design is convenient, the design cycle is short, the construction is convenient; the operation adjustment is convenient, and it is energy-saving. Therefore, the water loop heat pump system has a good application in the design of many large complex central air conditioning systems. [0003] The water loop heat pump air conditioning system is a kind of indoor small water / air heat pump unit connected in parallel to form a closed loop by using a water loop to form a heat pu...

AI Technical Summary

Problems solved by technology

When the circulating water temperature is too low, it will cause the unit to stop and affect the air conditioning effect

In addition, in summer, the air supply temperature of the heat pump unit is too low, which will cause condensation at the air outlet and affect the use of users.

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