US3785554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature responsive throttling valve
Assignee: EVANS Manufacturing CO JACKES
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Filing: 1970-12-04
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Granted: 1974-01-15
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Expires: 1990-12-04
Abstract
Abstract The present disclosure relates to an automotive air conditioner system which is arranged to have a throttle valve including a temperature-responsive power operating means situated in the refrigerant suction line for throttling refrigerant flow from the evaporator when the evaporator temperature drops toward a value low enough to cause ice formation on the evaporator fin surfaces. The throttle valve is preferably but not necessarily located upstream of the actuator means of the thermostatic expansion valve. The power operating temperature responsive means includes a wax filled container and a slidable piston which cooperatively move a valve member toward a valve seat when the temperature of the refrigerant in the suction line decreases to a moisture freezing level. The throttling effect prevents the compressor from pulling down the pressure and temperature within the evaporator to a level where ice or frost could form on the surfaces of the fins of the evaporator.
Inventors
- 👤 R Proctor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:45
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; F25; F25B; F25B41/00; F25B41/20; F25B41/22; F25B41/30; F25B41/31; F25B41/325; F25B41/33; F25B41/335; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0683; F25B2600/00; F25B2600/21
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
224 words
The combination for automatically regulating evaporator temperature in a refrigerating system of a throttle valve for throttling the flow of refrigerant fluid from an evaporator in a refrigerating system with refrigerant fluid metering means for controlling the flow of refrigerant fluid to an evaporator, said throttle valve comprising a valve body receiving said refrigerant fluid from an evaporator and, having openings near its opposite ends to allow flow of refrigerant fluid therethrough, a power operating means mounted within said valve body, said power operating means including a container having a mass of material sensitive to a limited range of temperatures which expands and contracts in accordance with the temperature of the refrigerant fluid, said container being disposed directly in the path of flow of said refrigerant fluid through said valve body, so that said valve responds immediately to changes in temperature of said refrigerant fluid, said power operating means including a slidable member cooperatively associated with said container and arranged to be reciprocated in accordance with the expansion and contraction of said mass of said material sensitive to a limited range of temperatures, a valve member operated by said power operating means and arranged to move away from and toward a valve seat in accordance with the reciprocation of said slidable member, and a biasing spring normally urging said valve member toward said seat.
Claim 2
Dependent Claim
224 words
The combination for automatically regulating evaporator temperature in a refrigerating system of a throttle valve for throttling the flow of refrigerant fluid from an evaporator in a refrigerating system with refrigerant fluid metering means for controlling the flow of refrigerant fluid to an evaporator, said throttle valve comprising a valve body receiving said refrigerant fluid from an evaporator and, having openings near its opposite ends to allow flow of refrigerant fluid therethrough, a power operating means mounted within said valve body, said power operating means including a container having a mass of material sensitive to a limited range of temperatures which expands and contracts in accordance with the temperature of the refrigerant fluid, said container being disposed directly in the path of flow of said refrigerant fluid through said valve body, so that said valve responds immediately to changes in temperature of said refrigerant fluid, said power operating means including a slidable member cooperatively associated with said container and arranged to be reciprocated in accordance with the expansion and contraction of said mass of said material sensitive to a limited range of temperatures, a valve member operated by said power operating means and arranged to move away from and toward a valve seat in accordance with the reciprocation of said slidable member, and a biasing spring normally urging said valve member toward said seat.
Claim 3
Dependent Claim
37 words
The combination of claim 1 wherein said container is disposed adjacent the opening in one end of said valve body and said valve member is disposed adjacent the opening in the opposite end of said valve body.
Claim 4
Dependent Claim
35 words
The combination of claim 1, wherein said biasing spring is situated between said valve member and a wall formed near the opening in one end of said valve body and surrounds said power operating means.
Claim 5
Dependent Claim
34 words
The combination of claim 1, wherein said slidable member is a piston having its free end connected to a spider member which is fitted into the opening at one end of said valve body.
Claim 6
Dependent Claim
20 words
The combination of claim 1, wherein said valve member is securely fixed to said container of said power operating means.
Claim 7
Dependent Claim
19 words
The apparatus of claim 4, wherein said free end of said piston is adjustably connected to said spider member.
Claim 8
Dependent Claim
33 words
The combination of claim 1, wherein said mass of material sensitive to a limited range of temperatures is a wax which undergoes a solid-liquid transition in accordance with the temperature of the fluid.
Claim 9
Dependent Claim
44 words
The combination of claim 1 wherein said narrow range of temperatures to which said mass of material is sensitive to operate said valve to modulate the flow of said refrigerant fluid through said valve body is of the order of approximately 28*F. to 39*F.
Claim 10
Dependent Claim
16 words
The combination of claim 1 wherein said refrigerant fluid metering means includes a thermostatic expansion valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |