Antifreeze protection device and antifreeze protection method for water system of air conditioning unit

Abstract

The invention provides an anti-freezing protection device and method for an air-conditioning unit water system. The anti-freezing protection device comprises a controller arranged in an outdoor unit, a water temperature sensor located in the air-conditioning unit water system and a first standby power supply. The controller is used for starting the first standby power supply to acquire the water temperature, collected by the water temperature sensor, of the air-conditioning unit water system when monitoring that an air-conditioning unit is in a powered-off manner, judging whether the water temperature is lower than or equal to a preset water temperature or not, and sending an anti-freezing alarm signal when the water temperature is lower than or equal to the preset water temperature. Due to the fact that the controller of the anti-freezing protection device starts the first standby power supply to acquire the water temperature, collected by the water temperature sensor, of the water system when the air-conditioning unit is powered off, and sends the anti-freezing alarm signal when the water temperature is lower than or equal to the preset water temperature so as to remind a user to perform anti-freezing treatment on the air-conditioning unit water system, safe and reliable guarantees are provided for stable operation of air-conditioning units with water as a cold medium.

Description

technical field [0001] The invention relates to the technical field of household electrical appliances, in particular to an antifreeze protection device and antifreeze protection method for the water system of an air conditioner unit, and an air conditioner system using the antifreeze protection device for the water system of the air conditioner unit. Background technique [0002] In areas rich in water resources, more and more users choose air-conditioning systems that use water and refrigerant as heat-exchange media to meet the needs of cooling and heating. An environmentally friendly, efficient and economical cooling method that meets energy saving and emission reduction policies. Therefore, such an air-cooled heat pump cold (hot) water unit is widely used in HVAC design systems. However, there is a more complete demand for antifreeze measures for the water system and water-side heat exchangers inside the unit and other related water system cooling accessories. [0003]...

AI Technical Summary

Problems solved by technology

[0003] Especially in areas with low temperature in winter, because the outdoor ambient temperature is as low as the freezing point of water, in such areas and environments, the unit is not used for a long time in winter or the power is cut off for a short time due to various reasons, but it is not resolved in time. The water in the water system of the unit will cause the water system of the unit to freeze

At present, the antifreeze protection measures for the water system of the unit are based on the effective antifreeze protection of the unit during operation or power-on standby. Once the power is cut off, the antifreeze protection will fail.

Based on the above conditions, if the user fails to remove the water in the system in time due to various operational errors, the water system will soon be frozen, the water system pipeline will be frozen, and the heat exchange tube of the water side heat exchanger of the air conditioning unit will be squeezed by ice. Flat and burst, eventually causing the water system and the cold medium system to immerse each other, bringing troubles to users, and causing major economic losses to air-conditioning manufacturers

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