Control method for multiple sets of units to stagger into preset state

Abstract

The invention relates to a method for controlling multiple units to enter a preset state in a staggered manner. The method comprises the following steps: presetting target temperatures, which are R+ (1-1) b, R+ (2-1) b and the like, R+ (M-1) b respectively, of M units; enabling each unit to correspond to the corresponding target temperature in a running process of the M units, and enabling the units to enter a preset running state respectively according to the respective target temperatures; and presetting the target temperatures corresponding to the M units again according to the M target temperatures when running time of the units at the preset target temperatures reaches a rotating period P, wherein last preset trigger temperatures of at least two units are not equal to the reset trigger temperatures corresponding to the units. By the method for controlling the multiple units to enter the preset state in the staggered manner, under the condition that heating demands of users are met, the running time of the units is adjusted in a balanced manner, resource waste is reduced, and the service lives of all the units are balanced as much as possible.

Description

technical field [0001] The invention relates to the technical field of unit operation control, in particular to a control method for multiple sets of units staggered into a preset state. Background technique [0002] Large-scale HVAC projects use N sets of heat pump units for common heating to meet the demand, but usually the factory configuration of the same type of units is generally the same, so when N sets of heat pump units are used for common heating at the same time, the following problems will occur: [0003] 1. The N groups of units set by the unit enter the defrosting state at the same time, causing the N groups of units to stop heating at the same time and unable to meet the user's heating demand; [0004] 2. The target temperature set by the N groups of units is the same. When the temperature on the user side reaches the target temperature, the N groups of units will stop or start at the same time, resulting in unnecessary waste of resources; [0005] 3. If diff...

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Problems solved by technology

[0003] 1. The N groups of units set by the unit enter the defrosting state at the same time, causing the N groups of units to stop heating at the same time and unable to meet the heating demand of users;

[0004] 2. The target temperature set by the N groups of units is the same. When the temperature on the user side reaches the target temperature, the N groups of units will stop or start at the same time, resulting in unnecessary waste of resources;

[0005] 3. If different defrosting cycles are set for each unit, running for a long time under this defrosting cycle may cause the defrosting of the unit with a long defrosting cycle to be unclean and affect the heat exchange efficiency of the unit; If the frost is too frequent, the heating capacity of the unit will be reduced; if different target temperatures are set for the unit, the heating capacity of each unit will be different. different

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