Refrigeration – Automatic control – Refrigeration producer
Patent
1987-06-30
1989-04-11
Tapolcai, William E.
Refrigeration
Automatic control
Refrigeration producer
236 92B, 277 27, 277212R, F25B 4104
Patent
active
048194433
ABSTRACT:
An improved expansion valve (10) is disclosed for use with an air conditioning system (12) for an automobile. High pressure refrigerant flow is modulated through the valve by movement of a valve member (92) in response to the superheat of the low pressure refrigerant flow through a first passage (32) in the expansion valve. The low pressure refrigerant superheat is sensed by a power element (74) containing an adsorbent and gas which deflects a diaphragm (82) to a degree related to the superheat of the low pressure flow. The diaphragm acts on an annular seal retainer (100) to modulate the position of the valve member (92). A cupshaped high pressure seal (104) is provided between the valve member (92) and wall of the passage (54) in which the valve member moves to balance the forces on the valve member exerted by the high pressure refrigerant. The balanced valve member allows use of a compact power element, permitting the body (30) of the valve (10) to be formed of plastic.
REFERENCES:
patent: 1120159 (1914-12-01), Pollard
patent: 2379286 (1945-06-01), Dodson
patent: 2520191 (1950-08-01), Aughey et al.
patent: 2539062 (1951-01-01), Dillman
patent: 3010518 (1961-11-01), Harmon
patent: 3064245 (1962-11-01), Lindberg, Jr.
patent: 3082825 (1963-03-01), Hannen, Sr.
patent: 3252294 (1966-05-01), Heidorn
patent: 3296816 (1967-01-01), Weibel, Jr. et al.
patent: 3330569 (1967-07-01), Skinner
patent: 3450345 (1969-06-01), Orth et al.
patent: 3525234 (1925-08-01), Widdowson
patent: 3537645 (1970-11-01), Treder
patent: 3574351 (1941-04-01), Stoltman
patent: 3592018 (1971-07-01), Widdowson
patent: 3702066 (1972-11-01), Beatenbough et al.
patent: 3708998 (1973-01-01), Scherer et al.
patent: 3731498 (1973-05-01), Beatenbough et al.
patent: 3953984 (1976-05-01), Widdowson
patent: 3962884 (1976-06-01), Widdowson
patent: 3965693 (1976-06-01), Widdowson
patent: 4288032 (1981-09-01), Hetz
patent: 4344566 (1982-08-01), Gotzenberger
patent: 4542852 (1985-09-01), Orth et al.
Watanabe Masaru
Yamamoto Osamu
Fujikoki America, Inc.
Tapolcai William E.
LandOfFree
Expansion valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Expansion valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expansion valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-658495