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An air source heat pump defrosting control point laboratory measurement 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: 2021-11-19
BEIJING UNIV OF TECH
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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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  • An air source heat pump defrosting control point laboratory measurement system and method
  • An air source heat pump defrosting control point laboratory measurement system and method
  • An air source heat pump defrosting control point laboratory measurement system and method

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[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

A laboratory measurement system and method for air source heat pump defrosting control points belong to the technical field of air source heat pump defrosting. The premise is that it is necessary to estimate the time interval of the optimal defrosting control point of the unit based on the basic information of the air source heat pump unit. The basic information includes the capacity of the unit, the characteristics of the internal system form, and the nominal performance of the frosting and defrosting conditions. Afterwards, three or more typical frosts are determined based on the typical meteorological parameters of the actual application area of ​​the unit. Here, the determination can be made based on the method of taking the average value of temperature and humidity. The defrosting control system of the unit can effectively and accurately control the defrosting operation based on reliable defrosting control parameters, solve the problem of "wrong defrosting" in the actual application of the existing air source heat pump defrosting control method, and ensure the efficient operation of the unit.

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...

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Application Information

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Patent Type & Authority Patents(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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