Energy tower heat pump unit secondary refrigerant freezing point monitoring control method and device thereof

Abstract

The invention discloses an energy tower heat pump unit secondary refrigerant freezing point monitoring control method and a device thereof, and is characterized in that the monitoring control method includes that a detection device of secondary refrigerant solution concentration and pH value sends out all kinds of detection signals to a heat pump unit controller, and the controller sends out signals of secondary refrigerant solvent adding, normal operation, stopping, and the like; the device comprises a compressor (1), a condenser (2), an electronic expansion valve (4) and an energy tower heat pump unit evaporator (3), which are connected to form a closed loop, and is characterized in that the detection device (5) of secondary refrigerant solution concentration and pH value is connected at both sides of the water inlet and outlet of the energy tower heat pump unit evaporator (3); the detection device (5) comprises a closed detection barrel (10), a densimeter (11), a pH value meter (7), a temperature sensor (8) and a valve (9), and the densimeter (11), the pH value meter (7) and the temperature sensor (8) are all electrically connected with a controller; the solution can be automatically adjusted when the indexes such as environmental condition or energy tower solution concentration change, thereby avoiding faults and decreasing operating cost.

Description

Technical field: [0001] The invention relates to the technical field of air-conditioning self-control, in particular to a method and device for monitoring and controlling the freezing point of a bridging refrigerant in an energy tower heat pump unit. Background technique: [0002] At present, heat pump air-conditioning systems for heating buildings mainly use air-cooled heat pumps and ground-source heat pumps. The air-cooled heat pump uses the refrigerant to exchange heat with the ambient air. It is easy to frost when heating in the humid and cold area with continuous rain, high air humidity, and low efficiency and instability. Ground source heat pumps exchange heat between refrigerant and brine, and the brine exchanges heat with soil. However, due to geological conditions, the use of ground source heat pumps is limited in situations where groundwater is insufficient or land is tight. In order to overcome the shortcomings of the above-mentioned existing technologies, a new ...

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Problems solved by technology

[0005] The invention mainly solves the problems that the existing energy tower heat pump unit cannot detect and monitor the freezing point of the refrigerant on line, is prone to ice blockage, and cannot be automatically adjusted and requires manual intervention, resulting in constant use and heavy maintenance workload.

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