Water chilling unit and heat pump unit

Abstract

The invention discloses a water chilling unit and a heat pump unit. The water chilling unit comprises a compressor, a water side heat exchanger, an outdoor heat exchanger, a throttling device, a user heat exchanger and a water pump, wherein the compressor, the water side heat exchanger, the outdoor heat exchanger and the throttling device define a refrigerant circulation system; the water side heat exchanger, the user heat exchanger and the water pump define a water circulation system; the water side heat exchanger comprises a temperature sensing device used for detecting the water temperature of a heat exchange pipe in the water side heat exchanger; the temperature sensing device is electrically connected with the compressor, the throttling device and the water pump for controlling the operation of the compressor, the throttling device and the water pump. The water chilling unit provided by the embodiment of the invention has the advantages that the problem of detection incapability due to too low local temperature in the heat exchange pipe can be solved; the problem of too low water temperature in the local heat exchange pipe due to insufficient water pump flow rate is solved; the problem of frost cracking due to nonuniform water flow in the heat exchange pipe can be effectively prevented or solved; the reliability of the unit and the use experience feeling are ensured to the maximum degree.

Description

technical field [0001] The invention relates to chiller units and heat pump units. Background technique [0002] Falling film or flooded evaporators are prone to local uneven water flow when the water flow in the system is insufficient during refrigeration operation, which makes the temperature of some heat exchange tubes too low, resulting in local frozen water freezing at too low a temperature. Frozen cracked heat exchange tubes. [0003] The manufacturer's method is to use a flow switch to prevent the water flow from being too low. There are also some methods to detect the outlet water temperature of the evaporator for unit control, or to detect the temperature inside the evaporator shell. However, these methods cannot solve the problem of local low temperature caused by uneven water flow in the flow channel of the evaporator. It is easy to freeze and crack the heat exchange tubes in the pipes, and it is difficult for the unit to detect this situation. The unit has no e...

AI Technical Summary

Problems solved by technology

However, these methods cannot solve the problem of local low temperature caused by uneven water flow in the evaporator channel

The heat exchange tubes are prone to freezing and cracking in the pipes, and the unit is not easy to detect this situation. The unit has no effective adjustment solution to solve the problem of freezing and cracking of the heat exchange tubes caused by low water temperature

Images