Quieting a thermal expansion valve
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United States of America Patent
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Dec 4, 2001
Grant Date -
N/A
app pub date -
Jul 26, 2000
filing date -
Jul 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of reducing flow noise in a thermally responsive expansion valve of the type for controlling flow of a relatively high pressure refrigerant from a condenser applied to its inlet at a substantially reduced pressure for circulation through an evaporator and including a solenoid operated shut-off valve in the inlet of the expansion valve. A reduced diameter flow passage is formed in the inlet upstream of the shut-off valve and a micro-porous element disposed in the reduced diameter passage and is operative for substantially reducing flow noise. The micro-porous element preferably has passage of about forty to one hundred eighty microns.
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