Gas leakage sensing structure in freezing cycle

Abstract

Abstract PURPOSE:To prevent an accident of lack of oxygen caused by a leakage of gas by a method wherein a safety device is provided which operates an alarm device when a detected differential pressure between a pressure of coolant in a liquid receiving unit and a pressure of coolant gas exceeds a set pressure. CONSTITUTION:A coolant liquid storing part of a liquid receiving unit 18, a spacing above the liquid storing part and a differential pressure sensor 21 of a diaphragm type are connected to communicate with each other so as to detect a differential pressure between a pressure of coolant liquid in the liquid receiving unit 18 and a pressure of coolant gas. When a detected differential pressure of a differential pressure sensor 21 exceeds a set pressure, a switch 25 is closed, a first relay contact point RX1 is opened and a driving of an indoor fan 8 is terminated. A second relay contact point RX2 is closed, an electronic expansion valve 11 is closed, a third relay contact point RX3 is closed, a main valve 10 is closed and at the same time a fourth relay contact point RX4 is closed to operate a buzzer 26 so as to generate an alarm.

Inventors

• 👤 Yoshinori Inoue
• 👤 良則 井上
• 👤 Yoshitaka Sasaki
• 👤 佐々木　義隆
• 👤 Masao Endo
• 👤 正雄 遠藤
• 👤 Yoshito Takeshita
• 👤 竹下　吉人

Bibliographic Details