Air conditioning system integral optimized control device

Abstract

The invention provides an air conditioning system integral optimized control device. The device comprises a host (101), a weak current control system (102), and a strong current control system (103), wherein both the weak current control system (102) and the strong current control system (103) are connected in parallel with the host (101) via an RS485 communication interface. The control device provided by the invention realizes the control completely compatible and parallel with an original central air conditioning control circuit, and has a local control mode and a remote control mode, wherein the local mode is applicable to site button operation, and the remote mode is applicable to remote computer remote control operation. The remote mode is divided into an automatic mode and a manualmode, wherein the manual mode can realize remote inching equipment operation, and the automatic mode can realize the full-automatic, failure-free and optimized operation of the central air conditioning system.

Description

technical field [0001] The invention relates to the technical field of central air-conditioning energy saving, in particular to an overall optimization control device for a central air-conditioning system. Background technique [0002] Large-scale central air-conditioning systems generally have more than 30% ineffective energy consumption. In actual operation, the maximum load of the air-conditioning system that operates throughout the year generally does not exceed 10% of the total operating time. Since the selection of air-conditioning equipment is based on the design conditions Definitely, and the air conditioning system works at a load rate below 80% most of the time. The energy saving of the central air-conditioning system has been paid more and more attention by people. [0003] At present, among the central air-conditioning energy-saving technologies, including water pump frequency conversion technology, chilled water system fuzzy control technology, neural network t...

AI Technical Summary

Problems solved by technology

For frequency conversion control with temperature difference as the feedback signal, if the temperature difference is set too small, it will inevitably cause frequent actions of the frequency converter, resulting in oscillation of the entire air conditioning system; if the temperature difference is set too large, it will reduce the sensitivity of the system to load changes, resulting in Frequency conversion control response lag

However, the frequency conversion control that only uses pressure as the feedback signal, because the pressure signal changes rapidly, and at the same time, the frequency conversion of the water pump will inevitably cause the change of the end valve, which will cause the change of the system pressure, and finally lead to the frequent action of the frequency converter, resulting in the oscillation of the entire air conditioning system

Therefore, if the control strategy of water pump frequency conversion is improperly selected, it will inevitably affect the stability of the entire system operation, resulting in a decrease in system operation efficiency, thereby increasing system energy consumption and offsetting the energy-saving effect brought by water pump frequency conversion.

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