JP2901911B

• Main Authors: NAKAGAWA RYOICHI, INUMARU YOSHIHIRO, HIRAIKE MANABU, TAKANO YOSHUKI, AOYAMA TOSHIO, MOTOSHIMA KAZUNAO
• Format: Patent
• Language: English
• Published: 07.06.1999
• Edition: 6
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To realize an energy saving operation and to enable an operation to be carried out under a wider condition by a method wherein any one of a starting or a stopping in operation of a compressor, a mode changing-over operation of a four-way valve or a changing-over of a three-way valve is controlled in response to a result of sensing of a temperature at a heat source water inlet and an indoor air temperature. SOLUTION: At least any one of a starting or a stopping in operation of a compressor 31, a mode changing-over operation of a four-way valve 32 or a changing-over of a three-way valve 8 is controlled by a control device 16 in response to a result of sensing of a first temperature sensing device 14 for sensing a heat source water inlet temperature and a result of sensing of a second temperature sensing device 15 for sensing an indoor air temperature. With such an arrangement as above, when the indoor air temperature is approached to a target indoor air temperature, it is possible to perform the most suitable air conditioning operation in reference to temperatures of heat source water and air to be processed. For example, it becomes possible to perform a proper selective operation of a fan coil operation, a heat pump operation or both a fan coil operation and a heat pump operation and further it is possible to perform an air conditioning operation corresponding to a load with a minimum amount of energy.