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

A heat pump unit, monitoring and control technology, applied in the directions of computer control, program control, general control system, etc., can solve the problems of inability to detect and monitor the freezing point of the refrigerant online, inability to automatically adjust and use unchanged, and heavy maintenance workload, etc. Achieve the effect of improving product competitiveness, reducing operating costs and maintenance costs, and facilitating debugging

Active Publication Date: 2009-10-21
烟台蓝德空调工业有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1, using the monitoring control device for the freezing point of the brine of the energy tower heat pump unit, the brine solution concentration and pH value detection device 5 detects the brine solution concentration, temperature, and pH value on-line when the heat pump unit is running. The controller 6 of the heat pump unit transmits various detection signals; the controller 6 performs judgment and analysis according to the received detection signals of the concentration, temperature, and pH value of the brine solution, and looks up the concentration signal to obtain the freezing point temperature of the brine, which is compared with Measure the temperature signal for comparison. If the difference between the freezing point temperature and the measured temperature is less than the set value, a dosing signal will be sent to the brine regulating device of the energy tower to increase the concentration of the brine and reduce the freezing point temperature; if t...

Embodiment 2

[0018] Example 2, see figure 1 , 2. Realize the monitoring and control device for the freezing point of the bridging refrigerant of the energy tower heat pump unit in Embodiment 1, and connect the compressor 1, the condenser 2, the electronic expansion valve 4 of the energy tower heat pump unit and the evaporator 3 of the energy tower heat pump unit to form a closed In the circuit, the concentration of the refrigerant solution and the pH value detection device 5 are connected on both sides of the water inlet and outlet of the evaporator 3 of the energy tower heat pump unit, that is, the concentration of the refrigerant solution and the pH value detection device are connected in parallel on the water inlet and outlet of the evaporator 3 of the energy tower heat pump unit 5. The brine solution concentration and pH value detection device 5 includes a closed detection barrel 10, and a density meter 11, a pH value meter 7 and a temperature sensor 8 are installed at any position of t...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02G05B19/048
Inventor 孟庆山陈金花王小鹏张战
Owner 烟台蓝德空调工业有限责任公司
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