An energy-saving control cabinet for an air-conditioning unit

Abstract

The invention relates to the field of energy-saving control of a central air-conditioning system, in particular to an energy-saving control cabinet of an air conditioning unit. The energy-saving control cabinet comprises a cabinet body and a cabinet door. A three-phase circuit breaker, three current transformers, a power frequency bypass contactor, a variable frequency switching contactor, a motor overload protector, a frequency converter, an intermediate relay and a single-phase miniature circuit breaker I are arranged on a lower mounting plate in the cabinet body. A single-phase miniature circuit breaker II, a direct-current switch power supply and an intelligent data processing unit are arranged on an upper mounting plate in the cabinet body. An intelligent operation touch screen is disposed on an upper cabinet door plate of the cabinet door. An alternating-current ammeter, an electricity meter, an alternating-current voltmeter, a signal indicating lamp, a manual frequency adjusting knob, a frequency operator operation panel, a start-stop button, a manual / automatic selection change-over switch, a three-phase main circuit breaker operating handle and a power frequency / variable frequency selection switch are disposed on a lower cabinet door plate of the cabinet door. By the energy-saving control cabinet, water valves and fans of the air conditioning unit can be intelligently controlled according to load changes, simplicity in mounting and debugging is realized, and energy-saving control on the air conditioning unit is realized.

Description

technical field [0001] The invention relates to the field of energy-saving control of a central air-conditioning system, in particular to an energy-saving control cabinet used in an air-conditioning unit. Background technique [0002] In the prior art, air-conditioning unit control generally adopts constant air volume control. No matter how the load in the air-conditioning area changes, the fan of the air-conditioning unit always runs at high frequency. However, the energy saving brought by water valve adjustment is very limited. It needs to cooperate with the adjustment of air supply volume to realize real-time tracking of indoor load changes and achieve the best energy-saving effect of equipment. However, most of the current air-conditioning unit control equipment does not With fan speed control function. In order to achieve frequency conversion control of fans, some products adopt the form of separately configuring inverters, but the problem is that since inverters, weak...

AI Technical Summary

Problems solved by technology

However, the energy saving brought by water valve adjustment is very limited. It needs to cooperate with the adjustment of air supply volume to realize real-time tracking of indoor load changes and achieve the best energy-saving effect of equipment. However, most of the current air-conditioning unit control equipment does not With fan speed control function

In order to achieve frequency conversion control of fans, some products adopt the form of separately configuring inverters, but the problem is that since inverters, weak current controllers, and on-site actuators are all provided by different manufacturers, it takes a lot of time for on-site installation and commissioning. A professional and multiple manufacturers coordinate and cooperate with each other. Since there is no unified installation form, the expected control effect cannot be achieved, and even the control system cannot operate safely.

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