Patent ID: 6748752
Filing Date: 2004-06-15
Classification: F25B,Y02A,Y02B

Abstract:
An aqua-ammonia absorption cooling and/or heating apparatus comprising:an absorber assembly, a generator assembly, a condenser, an evaporator, a refrigerant loop for directing refrigerant between said absorber assembly, generator assembly, condenser and evaporator, an absorption fluid loop for directing absorption fluid between said absorber assembly and said generator assembly, said absorption fluid loop including first piping for directing ammonia-rich absorption fluid from the absorber assembly to the generator assembly and second piping for directing ammonia-weak absorption fluid from the generator assembly to the absorber assembly, a valve assembly comprising one or more first valves cooperating with the second piping for controlling the flow rate of weak absorption fluid therein, and a temperature-sensing bulb in thermal contact with ammonia-weak absorption fluid in the generator assembly for opening and/or closing a first valve in response to the sensed temperature of the ammonia-weak absorption fluid, said valve assembly including a movable member for controlling the opening and closing thereof and having a first side exposed to the bulb pressure and a second side exposed to generator pressure or pressure of the ammonia-weak absorption fluid from the generator, wherein a first valve is opened and closed in response to pressure differential between the first and second side of the movable member.