Reducing noise in a thermal expansion valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 23, 2002
Grant Date -
N/A
app pub date -
May 11, 2000
filing date -
May 11, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thermal expansion valve for controlling flow of refrigerant from a high pressure (condenser) inlet to a low pressure (evaporator) outlet. The main valve is operated by pressure in a temperature sensing fluid filled capsule acting on a diaphragm connected to a valve operating rod. Upstream of the main valve, mounted on the same block is a solenoid operated shutoff valve. A first noise reducing restricting orifice is disposed in the high pressure inlet upstream of the shutoff valve. A second noise reducing restricting orifice is disposed in the shutoff valve which is preferably pilot operated.
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