Multi-split air-conditioning floor heating system and antifreeze control method thereof

Abstract

An embodiment of the invention provides a multi-split air-conditioning floor heating system and an antifreeze control method thereof, and relates to the technical field of air conditioners. The problems that in the prior art, a refrigerant leaks due to jamming of a throttling element of a floor heating water-using module, and thus, a heat exchanger of the floor heating water-using module is damaged due to frost can be solved. The antifreeze control method comprises the following steps of: acquiring the difference between a return water temperature or an outlet water temperature of a floor heating water-using module and a refrigerant liquid tube temperature of the floor heating water-using module and the closing time of a throttling element of the floor heating water-using module; when thedifference between the return water temperature or the outlet water temperature and the refrigerant liquid tube temperature is greater than or equal to a first preset threshold value and the closing time of the throttling element is greater than or equal to a second preset threshold value, controlling a water pump of the floor heating water-using module to be started, and meanwhile controlling thethrottling element to carry out throttling at a preset opening degree; or controlling starting of a heating unit and the water pump of the floor heating water-using module. The multi-split air-conditioning floor heating system is used for antifreeze of the floor heating water-using module.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a multi-connected air conditioning floor heating system and an antifreeze control method thereof. Background technique [0002] Multi-connected air conditioners have been more and more widely used because of their advantages such as energy saving, environmental protection, and convenient installation and use. In order to meet the higher requirements of users and have the advantages of multi-connected air conditioners and floor heating at the same time, a multi-connected air-conditioning and floor heating system that integrates multi-connected air conditioners and floor heating has appeared on the market. [0003] In the multi-connected air conditioner floor heating system, when the indoor unit of the multi-connected air conditioner is running cooling, but the floor heating water module is not turned on, that is, when the electronic expansion valve of the floor heating wa...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a multi-connected air-conditioning floor heating system and its antifreeze control method, which can solve the problem of refrigerant leakage caused by the blockage of the throttling element of the floor heating water module in the prior art, and further cause the heat exchanger of the floor heating water module to be damaged. freezing problem

Images