Control method and device for valve cut-off protection, controller and air conditioner

• Main Authors: LUO YONGQIAN, HUANG JIE, MIAO WANLEI, CHEN SHENGWEN, ZHAO JUNMENG, LIU HUI
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2021
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

The invention relates to a control method and device for valve cut-off protection, a controller and an air conditioner. The control method comprises the steps that after the air conditioner is started and runs for a certain time, whether a first preset condition for judging valve cut-off is met or not is judged, if yes, the air conditioner is controlled to stop for a certain time and then is started again, whether a second preset condition for determining that a valve is cut off abnormally for valve cut-off or not is met or not is judged again after the air conditioner runs for a certain time, and if the condition is met again, it is determined that the valve is cut off abnormally, so that corresponding valve cut-off protection is triggered, wherein if the air conditioner operates in a heating mode, whether AC current is too small or whether a difference value between the top temperature of the outer side of a compressor and the exhaust temperature is too large or not is judged. Through the arrangement, accur