Indoor unit mode conversion control method of heat recovery multi-connection and heat recovery multi-connection

Abstract

The invention discloses an inner machine mode switching control method of a heat recovery multi-union machine and the heat recovery multi-union machine. The heat recovery multi-union machine comprises a compressor, a reversing valve, an outdoor heat exchanger, a high-pressure gas pipe, a liquid pipe, a low-pressure gas pipe, an indoor heat exchanger and a cold and heat converter corresponding to the indoor heat exchanger. The inner machine mode switching control method includes the steps that when refrigerating mode and heating mode of the indoor heat exchanger are switched, whether the revering valve needs to be reversed or not is judged; the corresponding cold and heat converter is operated and the reversing valve is operated to control the indoor heat exchanger to conduct switching of the refrigerating mode and heating mode if the judgment result shows that the revering valve needs to be reversed; and the corresponding cold and heat converter is operated to control the indoor heat exchanger to conduct switching of the refrigerating mode and heating mode if the judgment result shows that the reversing valve does not need to be reversed. By means of the inner machine mode switching control method, selective distinguishing can be conducted according to different conversion situations, and flexible handling is performed, so that noise is reduced in an oriented manner, and the use comfort of users is improved.

Description

Technical field [0001] The invention relates to the field of air conditioners, and in particular to an internal machine mode conversion control method of a heat recovery multi-line and a heat recovery multi-line. Background technique [0002] With the continuous development of multi-line technology, heat recovery multi-line products as an energy-saving and efficient product have attracted more and more attention from users. [0003] The heat recovery multi-line can realize the function of some indoor heat exchangers running in cooling mode and some indoor heat exchangers running in heating mode in the system. In the prior art, when the indoor heat exchanger performs the conversion between the cooling mode and the heating mode, it is usually controlled by a cold-heat converter corresponding to the indoor heat exchanger. However, because the indoor heat exchanger is switching between the cooling mode and the heating mode, it involves the problem of switching the flow direction of th...

AI Technical Summary

Problems solved by technology

However, since the indoor heat exchanger switches between the cooling mode and the heating mode, it involves the switching of the refrigerant flow direction, the switching noise of the internal unit mode switching control method in the prior art is relatively large, especially when the high-pressure side refrigerant and the low-pressure side refrigerant are switched. When the pressure is high, the impact of the pressure will cause obvious noise and pipeline vibration, which will affect the comfort of the user.

Images