Expansion valve

Details Expansion valve Expansion valve

1990-12-03

1992-07-07

Tapolcai, William E.

Refrigeration

Automatic control

Refrigeration producer

236 92B, F25B 4104

Patent

active

051272377

ABSTRACT:
An expansion valve (10) for controlling the flow rate of refrigerant supplied to an evaporator (1) of a refrigerating system comprises a temperature-sensing chamber (30) entirely provided within the housing (11) of said expansion valve in a low pressure passage (12) thereof. Said passage (13) is connected to the outlet of said evaporator (1) and the inlet of a compressor (2), for converting a temperature change into a pressure change in order to actuate a valve mechanism (20) in response to a rise and lowering in pressure of said temperature-sensing chamber to open and close a passage (13) for adiabatic expansion of the refrigerant. Said temperature-sensing chamber (30) contains a sealed gas charge and an adsorbent material (35) for adsorbing and releasing said gaseous medium in accordance with temperature changes sensed.

REFERENCES:
patent: Re23706 (1953-09-01), Lange
patent: 3855836 (1974-12-01), Takahashi et al.
patent: 4819443 (1989-04-01), Watanabe et al.
patent: 4979372 (1990-12-01), Tanaka

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