A multi-connected air-conditioning floor heating system and its antifreeze control method

Abstract

The embodiment of the present invention provides a multi-connected air-conditioning floor heating system and its antifreeze control method, which relate to the field of air conditioning technology and 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, thereby causing the problem of the floor heating water module. The problem of the heat exchanger being damaged by freezing. The antifreeze control method includes: obtaining the difference between the return water temperature or the outlet water temperature of the floor heating water module and the temperature of the refrigerant liquid pipe of the floor heating water module, and the closing time of the throttling element of the floor heating water module; when the return water temperature or the outlet water temperature When the difference between the temperature of the refrigerant liquid pipe and the temperature of the refrigerant liquid pipe is greater than or equal to the first preset threshold, and the closing time of the throttling element is greater than or equal to the second preset threshold, the water pump of the floor heating water module is controlled to turn on, and the throttling element is controlled at the same time. throttling according to the opening degree; or, control the water pumps of the heating unit and the floor heating water module to turn on. The invention is used for antifreezing of floor heating water modules.

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...

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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

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