Water shortage anti-freezing method and device for cold and hot water unit

Abstract

The embodiment of the invention provides a water shortage anti-freezing method and device for a cold and hot water unit which is applied to a heat pump system. The method comprises the following stepsof starting a water inlet pump for water feeding and acquiring a current water flow state when the cold and hot water unit is in an anti-freezing protection mode; judging whether the current water flow state is in a normal state or not; starting a compressor unit to make heat and acquiring a current working parameter and a current environment temperature value when the current water flow state isin an abnormal state; and closing the water inlet pump and the compressor unit or continuously starting the water inlet pump and the compressor unit according to the current working parameter and thecurrent environment temperature value. According to the water shortage anti-freezing method and device for the cold and hot water unit, the damage risk of each unit of a heat pump system can be reduced, the practicability and the service life of the heat pump system can be improved, the difficulty of manual detection can be reduced, and accordingly a technician can conveniently perform maintenance management on the heat pump system.

Description

technical field [0001] The invention relates to the field of industrial technology, in particular to a method for preventing water shortage and freezing of a cold and hot water unit. Background technique [0002] Heat pump (Heat Pump) is a device that transfers heat energy from a low-level heat source to a high-level heat source, and it is also attracting much attention all over the world. Heat pumps usually first obtain low-grade heat energy from natural air, water or soil, and then provide people with high-grade heat energy that can be used through electricity. [0003] One of the commonly used heat pumps is the air source heat pump. During the operation of the air source heat pump, the evaporator absorbs heat from the ambient heat in the air to evaporate the heat transfer working medium. After the working medium vapor is compressed by the compressor, the pressure and temperature rise, and the high temperature When the steam passes through the special annular tube bonded ...

AI Technical Summary

Problems solved by technology

However, it may happen that the heating water in the system may be released due to the user's misoperation or the water cannot be pumped due to blockage of the components, which will cause the water pump to run dry after the unit enters the antifreeze mode, and also increase the probability of unit damage.

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