Control method of enthalpy-increasing air-conditioning system

Abstract

The invention discloses a control method of an enthalpy increasing air conditioning system. The control method includes the following steps that firstly, an air supplement time interval from closing to opening of an air supplement valve is defined as Tn within the nth enthalpy increasing period; secondly, when the air supplement valve is opened and the nth enthalpy increasing period starts, whether supplemented air in an air supplement branch carries liquid is detected, if yes, the air supplement valve is closed, one is added to the number of times of opening and closing of the air supplement valve, after Tn passes, the air supplement valve is opened, and the operation is circularly conducted until the nth enthalpy increasing period is ended; thirdly, an air supplement time interval Tn+1 of the air supplement valve in the (n+1)th enthalpy increasing period is calculated according to the accumulated number m of times of opening and closing of the air supplement valve within the nth enthalpy increasing period and Tn. According to the control method of the enthalpy increasing air conditioning system, an air supplement time interval of the air supplement valve in the next enthalpy increasing period is adjusted according to the accumulated number of times of opening and closing, the air supplement time intervals of the air supplement valve can be automatically adjusted according to the situation that supplemented air of the system carries liquid, and adaptability is high.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to a control method for an enthalpy-increasing air-conditioning system. Background technique [0002] The existing enthalpy-increasing air-conditioning system includes an enthalpy-increasing compressor and an air supply branch connected to the enthalpy-increasing port of the enthalpy-increasing compressor. An air supply valve is arranged on the air supply branch, and the air supply valve is usually a solenoid valve. The control method of the air supply valve in the prior art is as follows: when the air supply valve is detected to be filled with liquid in the air supply branch, the air supply valve will be closed, and then opened again after a period of time. With this control method, if the time from the last closing to the next opening of the supplementary air solenoid valve is too long, the advantages of the enthalpy increasing system cannot be reflected; if the time is too short, the...

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Problems solved by technology

[0003] In view of the above-mentioned current state of the art, the technical problem to be solved by the present invention is to provide a control method for an enthalpy-increasing air-conditioning system, which can adjust the time interval of the air replenishment valve according to the situation of air replenishment with liquid, so as to solve the problem caused by the time of replenishment. The time setting caused by the fixed interval is too long to reflect the advantage of increasing enthalpy, and the time setting is too short may cause the problem of frequent opening and closing of the air supply valve

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