Method and device for linked control of indoor machine and outdoor machine of precision air conditioner

Abstract

The invention provides a method for linked control of an indoor machine and an outdoor machine of a precision air conditioner. The method is characterized by comprising the steps: acquiring a target refrigerating amount Qn of a compressor, target power W1 of the compressor, target power W2 of a condenser and target power W3 of an evaporator, according to an energy efficiency ratio function COP of the air conditioner, in a range of Qn (+ / -a%+1), optimizing a target working frequency fn, a condensation temperature Tcn and an evaporation temperature Ten in a given range to obtain a target working frequency fnd, a target condensation temperature Tcnd and a target evaporation temperature Tend under the situation that the COP value is a maximum value, wherein a is a preset natural number; and adjusting a rotation speed N of the evaporator according to the target temperature difference at an inlet and an outlet of the evaporator, controlling the compressor to run at the target working frequency fnd, adjusting a rotation speed M of the condenser according to the target condensation temperature Tcnd, wherein the target temperature difference at the inlet and the outlet of the evaporator is deltat2-(Tend-Ten).

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a control method and device for the linkage of internal and external units of a precision air conditioner. Background technique [0002] IT equipment in the data center has high power density, high heat load, and high requirements on temperature and humidity. A dedicated computer room precision air-conditioning system is required to ensure the stable operation of the data center. According to the energy consumption analysis of the data center, the precision air-conditioning system is the largest energy-consuming system in the data center except IT equipment, and its power consumption accounts for 35%-40% of the total power consumption of the data center. Improving the COP of the precision air conditioning system is the key to energy saving in the data center. COP is defined as the ratio of heating capacity (W) to input power (W), that is, the energy efficiency ra...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a precision air-conditioning internal and external unit linkage control method and device, which can solve the problem that the control strategy of the existing precision air-conditioning system lacks the COP of the precision air-conditioning system due to the independent control of the evaporator and the condenser. Consider and optimize, and there are technical problems of slow regulation speed and high delay

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