Refrigeration – Automatic control – Trapping and discharging refrigerant batches
Patent
1978-12-22
1980-09-23
Wayner, William E.
Refrigeration
Automatic control
Trapping and discharging refrigerant batches
62509, F25B 3904, F25B 4100
Patent
active
042235375
ABSTRACT:
An air cooled centrifugal water chiller is disclosed which may be operable (1) under conditions of low outdoor ambient temperature, requiring flooding of the air cooled condenser in order to reduce its capacity and maintain proper system operation; or (2) in a heat recovery mode through the provision of a liquid cooled heat recovery condenser which thereby accommodates a portion of or all the condensing load, also requiring reduction in the capacity of the air cooled condenser through flooding. In order to provide sufficient refrigerant within the system to accommodate flooding under the conditions enumerated above, a refrigerant storage vessel is provided in communication with the shell of the evaporator of the system for receiving and storing excess liquid refrigerant during those operating conditions when it is not required in order to flood the air cooled condenser. An added feature lies in the provision of suitable service valves for isolating the air cooled condenser and the refrigerant storage vessel from the evaporator and centrifugal compressor such that liquid refrigerant from the evaporator may be pumped into the refrigerant storage vessel in order to allow servicing of the compressor or evaporator. In a preferred embodiment, the refrigerant storage vessel comprises an elongated pipe member connected at one end to the evaporator shell and extending therefrom along an axis generally parallel to the longitudinal extent of the air cooled condenser.
REFERENCES:
patent: 3191396 (1965-06-01), Ruddock
patent: 3260067 (1966-07-01), McClure et al.
patent: 3857253 (1974-12-01), Burgett et al.
patent: 4081971 (1978-04-01), Eber
Sanborn Duane F.
Ware Chester D.
Ferguson Peter D.
Lewis Carl M.
The Trane Company
Wayner William E.
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