Air source heat pump defrosting control point laboratory determination system and method

An air source heat pump and measurement method technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as wrong defrosting, and achieve the effects of avoiding wrong defrosting, simple operation, and short test cycle

Active Publication Date: 2021-02-26
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a laboratory measurement system and method for defrosting control points of air source heat pumps based on the optimal defrosting control point theory, so that the defrosting control system of the unit can effectively and accurately control defrosting based on reliable defrosting control parameters operation, to solve the problem of "false defrosting" in the actual application of the existing air source heat pump defrosting control method, and ensure the efficient operation of the unit

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  • Air source heat pump defrosting control point laboratory determination system and method
  • Air source heat pump defrosting control point laboratory determination system and method
  • Air source heat pump defrosting control point laboratory determination system and method

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Embodiment Construction

[0049] Below in conjunction with accompanying drawing, do further example description for the present invention:

[0050] combine figure 1 , an air source heat pump defrosting control point laboratory measurement system based on the optimal defrosting control point theory of the present invention, including an artificial environment laboratory 1, a real-time data monitoring and recording platform 2, a measured air source heat pump unit 3 and monitoring Several sensor devices.

[0051] Among them, the temperature and humidity sensor monitoring point is set in the outdoor space of the artificial environment laboratory 1 to test the ambient temperature and humidity of the evaporator of the air source heat pump unit 3 under test; Monitor the power consumption P of the unit; install plug-in temperature sensors on the inlet / outlet pipes of the condenser of the air source heat pump unit 3 to be tested, and test the inlet / outlet water temperature T of the unit in / T out Install wat...

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Abstract

The invention discloses an air source heat pump defrosting control point laboratory determination system and method, and belongs to the technical field of air source heat pump defrosting. The premiseis that the interval of the moment of the optimal defrosting control point of a unit needs to be estimated according to the basic information of the air source heat pump unit, and the basic information comprises the unit capacity, the internal system form characteristics, the frosting and defrosting normal working condition performance and the like. Then, three or more kinds of typical frosting are determined according to the typical meteorological parameters of the actual application region of the unit, and typical frosting can be determined according to a temperature and humidity mean valueobtaining method. The unit defrosting control system can effectively and accurately control defrosting operation according to reliable defrosting control parameters, the problem of wrong defrosting occurring in practical application of an existing air source heat pump defrosting control method is solved, and efficient operation of the unit is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of air source heat pump defrosting, and in particular relates to a laboratory measurement system and method for defrosting control points of air source heat pumps based on the optimal defrosting control point theory. Background technique [0002] During the heating operation of the air source heat pump unit in winter, if the temperature of the outdoor heat exchanger coil is too low under certain humidity conditions, frosting will occur. With the growth and accumulation of the frost layer on the surface of the heat exchanger, the resistance of the air flowing through the finned tubes increases, the flow rate decreases, and the heat transfer resistance increases, causing the heating performance of the unit to decline. In severe cases, the unit will shut down and affect the user experience. . Therefore, periodic defrosting operations are essential. [0003] The existing defrosting control methods can be rough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02
CPCF25B47/02F25B2347/021F25B2600/01F25B2700/2104
Inventor 王伟孙育英赵继晗罗庆林瑶王世权
Owner BEIJING UNIV OF TECH
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