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Control method, device and system suitable for refrigerant flow of air conditioner in machine room

A technology for refrigerant flow and computer room air conditioning, applied in heating and ventilation control systems, control inputs involving air characteristics, space heating and ventilation control inputs, etc., can solve problems affecting the accuracy of the opening of electronic expansion valves, and achieve improved Comprehensive energy efficiency ratio and the effect of improving the operating efficiency of the unit

Inactive Publication Date: 2021-02-09
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the connecting pipes of the outdoor unit and the indoor unit of the air conditioner are easily affected by the external ambient temperature, which will affect the accuracy of controlling the opening of the electronic expansion valve.

Method used

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  • Control method, device and system suitable for refrigerant flow of air conditioner in machine room
  • Control method, device and system suitable for refrigerant flow of air conditioner in machine room
  • Control method, device and system suitable for refrigerant flow of air conditioner in machine room

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Embodiment Construction

[0039] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] see figure 1 As shown, the embodiment of the present invention provides a method for controlling the flow rate of refrigerant suitable for computer room air conditioners, including the following steps:

[0041] Obtain indoor air inlet temperature and humidity, outlet air temperature and humidity, indoor fan frequency, compressor suction port temperature and pressure; calculate the actual indoor heat load Q according to the inlet air temperature and humidity, outlet air temperature and humidity, and indoor fan frequency And indoor actual load percentage load%;

[0042] Calculate the target suction superheat ΔT according to the actual indoor load percentage load% 1 ;

[0043] According to the preset refrigerant pressure and temperature curve, the monitored temperature and pressure P of the compressor suction port, calculate the actual ref...

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Abstract

The invention discloses a control method, device and system suitable for refrigerant flow of an air conditioner in a machine room, and relates to the technical field of air conditioner equipment. According to the control method, device and system suitable for the refrigerant flow of the air conditioner in the machine room, target air suction superheat degree delta T1 is calculated according to airinlet temperature and humidity, air outlet temperature and humidity and the frequency of an indoor fan; actual air suction superheat degree delta T2 is calculated according to the temperature T3 of an air suction port of a compressor and actual refrigerant saturation temperature TS; and the target air suction superheat degree delta T1 is compared with the actual air suction superheat degree deltaT2, the opening degree of an electronic expansion valve is adjusted according to the comparison result, the control target of the air suction superheat degree is adjusted to be the target value related to the load of a unit, when part of the load runs, the target value of the air suction superheat degree is controlled to be the optimal value of running of the system, the opening degree of the electronic expansion valve is accurately controlled, and the unit running efficiency during running of part of the load is improved.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to a method, device and system suitable for controlling the refrigerant flow rate of air-conditioning in a computer room. Background technique [0002] At part load, due to the decrease of refrigerant flow rate and the decrease of heat transfer performance of evaporator, if the superheat degree is kept the same as that of full load, the energy efficiency of the compressor is not optimal. At partial load, properly opening the electronic expansion valve reduces the suction superheat and increases the refrigerant circulation, which can improve the heat exchange effect and increase the evaporation temperature, thereby improving the energy efficiency of the unit. In the case of the same cooling capacity, the frequency of the compressor is reduced, and the power consumption is also reduced. In order to solve the above problems, in the prior art, the comprehensive energ...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/64F24F11/74F24F11/84F24F11/86F24F11/88F24F110/10F24F140/20
CPCF24F11/30F24F11/64F24F11/74F24F11/84F24F11/86F24F11/88F24F2110/10F24F2140/20
Inventor 张思秀万飞凡郑耀周文胜吴启博
Owner FENGHUO COMM SCI & TECH CO LTD
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