December 27, 2021
The invention relates to a control method of a plurality of air source heat pump units and an air source heat pump system, relating to the technical field of air source heat pump. The utility model solves the problem that in the prior art, multiple heat pump units are independent, resulting in the complex control operation, and the starting and stopping of multiple heat pump heaters can not be reasonably controlled according to the actual load, resulting in the waste of resources. The invention comprises the following steps: opening at least one air source heat pump unit, calculating the demand frequency of the compressor in each air source heat pump unit according to the target water temperature and the water outlet temperature of the water module in the air source heat pump unit, and calculating the first difference value; When the first difference is greater than zero, another air source heat pump unit needs to be switched on to return to the step of calculating the first difference; when the first difference is less than or equal to zero, no new air source heat pump unit needs to be switched on; The first difference is the sum of the maximum of multiple demand frequencies minus the first threshold of the compressor in the air source heat pump unit that needs to be turned on.
