Fault diagnosis method and device of heat pump system, heat pump system and storage medium

• Main Authors: FENG WEIQING, SONG QIANG, LIU JIANGBIN, SONG NIANHUAN, MAO SHOUBO
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2024
• Subjects: BLASTING; FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

The invention relates to the technical field of heat pumps, and discloses a heat pump system fault diagnosis method which comprises the steps that under the condition that a heat pump system operates stably, the first water outlet temperature and the first water inlet temperature of a water circulation loop are obtained, and the exhaust pressure of a refrigerant circulation loop is obtained; the difference value between the saturation temperature corresponding to the exhaust pressure and the first water outlet temperature is calculated, and the heat exchange temperature difference is obtained; when the absolute value of the heat exchange temperature difference is larger than a preset temperature difference threshold value, the water pump rotating speed is adjusted; under the condition that the heat pump system stably operates again, the second water outlet temperature and the second water inlet temperature of the water circulation loop are obtained; according to the first water outlet temperature, the first w