PURPOSE: To provide a leakage detecting sensor for detecting and recognizing the dielectric constant change in an ammonia gas atmosphere leaked into an outdoor unit in the sensor of an ammonia absorption type heat pump system.
CONSTITUTION: When ammonia is leaked into an outdoor unit 21, the pressure in a refrigerant circuit is varied, which is recognized by an ammonia leakage detector 26 via a pressure sensor 22. On the other hand, the load applied to a solution pump 10 is also varied corresponding to the pressure change at the time of leaking the ammonia, which is recognized by the detector 26 as a current change. Particularly, in the case of the abnormal state of the ammonia leakage at the time of operating, it can be recognized by both the types of the sensors, and can be recognized by the operation of the sensor 22 for the ammonia leakage during stopping.
SAWADA TAKASHI
KOGA RYOICHI
ITO MASARU
ISHII TAKAHITO
| JPH06229644A | 1994-08-19 | |||
| JPH03144266A | 1991-06-19 | |||
| JPS5459194A | 1979-05-12 | |||
| JPH03211415A | 1991-09-17 | |||
| JPH0694338A | 1994-04-05 | |||
| JPS6344157A | 1988-02-25 | |||
| JPS5194281U | 1976-07-28 | |||
| JPS59180350A | 1984-10-13 | |||
| JPS60100743A | 1985-06-04 |