Expansion valve

Details Expansion valve Expansion valve

1992-12-14

1994-04-19

Tapocai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

053038649

ABSTRACT:
In an expansion valve for controlling the flow rate of a refrigerant supplied to an evaporator of a refrigerating system, a temperature-sensing chamber is provided to sense the temperature of the refrigerant returning from said evaporator and to actuate a valve mechanism in order to regulate the flow of refrigerant supplied to said evaporator. An adsorption means provided inside the temperature-sensing chamber to adsorb a liquefied part of a gas charge within said chamber in order to hold said liquefied part away from warm wall parts inside said chamber. In addition, or as an alternative, said temperature-sensing chamber is separated from a return passage of said refrigerant by thermal-transfer-delay means for delaying the thermal transfer of a temperature change from the refrigerant to a sealed charge within said temperature-sensing chamber. Said thermal-transfer-delay means can be made as a flow restrictor for supressing an excessive flow between said chamber and said return passage of the refrigerant.

REFERENCES:
patent: 3667247 (1972-06-01), Proctor
patent: 4819443 (1989-04-01), Watanabe et al.
patent: 4979372 (1990-12-01), Tanaka
patent: 5044170 (1991-09-01), Tanaka
patent: 5060485 (1991-10-01), Watanabe et al.
patent: 5127237 (1992-07-01), Sendo et al.

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