US3810366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration valve
Assignee: Eaton Corp
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Filing: 1972-07-31
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Granted: 1974-05-14
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Expires: 1992-07-31
Abstract
Abstract Each of the valves shown has parallel flow paths through the body with an expansion valve in the line leading to the evaporator thermostatically controlled by conditions in the return line. A second valve is positioned in the return line and controlled in response to a condition (temperature or pressure) which is indicative of conditions (temperature and pressure) in the evaporator. This arrangement prevents evaporator freezing. The valves are suited for flange fitting by reason of having all ports parallel enabling the valve to be secured to the evaporator (on one side) and to the compressor suction line and the condenser outlet on the other side. Since the thermostatic expansion valve can be ''''externally equalized'''' internally and all control functions are incorporated in the single body, the number of connections to be made by the system assembler are minimized. One version is provided with a receiver-drier which can be changed without disturbing other system connections.
Inventors
- 👤 C Orth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:46
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; F25B41/00; F25B41/20; F25B41/22; F25B41/30; F25B41/31; F25B41/325; F25B41/33; F25B41/335; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0683
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
A control for a refrigeration system of the type having a compressor, condenser, and evaporator, the control comprising, a valve body having a supply conduit and a suction conduit therethrough, the conduits being generally parallel, a valve in the supply conduit to regulate flow to the evaporator, means controlling said valve in accordance with temperature and pressure in the suction conduit, a valve in the suction conduit regulating flow from the evaporator, means controlling the valve in the suction conduit in accordance with a condition of refrigerant in said body at a location upstream of the suction conduit valve and which is directly related to the condition of refrigerant in the evaporator, said body being provided with two parallel faces and each conduit passes from one face to the other so connection in the system is simplified by having the connections to each face planar.
Claim 2
Dependent Claim
145 words
A control for a refrigeration system of the type having a compressor, condenser, and evaporator, the control comprising, a valve body having a supply conduit and a suction conduit therethrough, the conduits being generally parallel, a valve in the supply conduit to regulate flow to the evaporator, means controlling said valve in accordance with temperature and pressure in the suction conduit, a valve in the suction conduit regulating flow from the evaporator, means controlling the valve in the suction conduit in accordance with a condition of refrigerant in said body at a location upstream of the suction conduit valve and which is directly related to the condition of refrigerant in the evaporator, said body being provided with two parallel faces and each conduit passes from one face to the other so connection in the system is simplified by having the connections to each face planar.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1 in which a receiver-drier means is mounted on the body and includes conduit means intersecting the supply conduit upstream of the valve in the supply conduit and operative to divert flow into the receiver-drier and return it to the supply conduit after passage through the receiver-drier.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 2 in which the receiver-drier means is threadably mounted on the body for removal and mounting without disturbing other system connections.
Claim 5
Dependent Claim
46 words
Apparatus according to claim 2 including a bypass conduit in the body leading from one face to the suction conduit downstream of the valve in the suction conduit, and a valve in the bypass conduit operative to open in response to a predetermined pressure differential thereacross.
Claim 6
Dependent Claim
138 words
A control for a refrigeration system of the type having a compressor, condenser, and evaporator, the control comprising, a valve body having a supply conduit and a suction conduit therethrough, the conduits being generally parallel, a valve in the supply conduit to regulate flow to the evaporator, means controlling said valve in accordance with temperature and pressure in the suction conduit, a valve in the suction conduit regulating flow from the evaporator, means controlling the valve in the suction conduit in accordance with a condition of refrigerant in said body at a location upstream of the suction conduit valve and which is directly related to the condition of refrigerant in the evaporator, said means controlling the valve in the supply conduit being responsive to temperature upstream of the suction valve and to pressure downstream of the suction valve.
Claim 7
Dependent Claim
138 words
A control for a refrigeration system of the type having a compressor, condenser, and evaporator, the control comprising, a valve body having a supply conduit and a suction conduit therethrough, the conduits being generally parallel, a valve in the supply conduit to regulate flow to the evaporator, means controlling said valve in accordance with temperature and pressure in the suction conduit, a valve in the suction conduit regulating flow from the evaporator, means controlling the valve in the suction conduit in accordance with a condition of refrigerant in said body at a location upstream of the suction conduit valve and which is directly related to the condition of refrigerant in the evaporator, said means controlling the valve in the supply conduit being responsive to temperature upstream of the suction valve and to pressure downstream of the suction valve.
Claim 8
Dependent Claim
56 words
Apparatus according to claim 5 in which the means controlling the valve in the supply conduit includes a diaphragm having one side exposed to pressure in a chamber, a conduit located wholly within the valve body and leading From the chamber to a point in the suction conduit downstream of the valve in the suction conduit.
Claim 9
Dependent Claim
46 words
Apparatus according to claim 6 including a bypass conduit in the body leading from one face to the suction conduit downstream of the valve in the suction conduit, and a valve in the bypass conduit operative to open in response to a predetermined pressure differential thereacross.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |