ENERGY-SAVING OPERATION SYSTEM OF REFRIGERATING MACHINE

• Main Author: MATSUOKA KIYOAKI
• Format: Patent
• Language: English
• Published: 08.08.2000
• Edition: 7
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

PROBLEM TO BE SOLVED: To reduce the total working time of a compressor by newly providing upper-limit and lower-limit temperatures for cooling in addition to control upper- limit and lower-limit temperatures and overlapping the general cooling and stopping periods of all temperature difference cooling space at the same timing. SOLUTION: Supposing that space A is in a general cooling period even if space B and C are in a general cooling stop period, refrigerant solenoid valves 21 and 22 in the space B and C are forced to be opened since a compressor 12 is operating and the space B and C are simultaneously cooled until the temperature in the space A reaches a control low-limit temperature, for example, when the space A cannot follow descent conditions. Even if the temperatures of the space B and C are cooled to each control low-limit temperature or less before the temperature in the space A reaches the control low-limit value, the refrigerant solenoid valves 21 and 22 are maintained to be open until the cooling low-limit temperature is reached if they follow descent conditions, and all refrigerant solenoid valves 20, 21, and 22 are simultaneously closed and the compressor 12 is stopped when the temperature in the space A reaches a control low-limit temperature.