US3831392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioner with air flow sensor
Assignee: HEIL-QUAKER HOME SYSTEMS Inc A CORP OF
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Filing: 1973-05-21
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Granted: 1974-08-27
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Expires: 1993-05-21
Abstract
Abstract An air conditioning system comprising an air duct for a stream of air flowing therethrough, an air permeable refrigerant evaporator in the duct for chilling the air and an air pressure differential sensor in communication simultaneously with opposite sides of the evaporator for sensing the pressure drop of air passing through the evaporator with the sensor being mounted entirely on the evaporator and supported only thereby. The disclosure also includes the system in which the evaporator is an A-coil and with the sensor being a U-tube with spaced taps therealong located at the apex of the coil with one tube part being on the inside of the A-coil and the other on the outside.
Inventors
- 👤 R Hafner
- 👤 R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:36
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0046; F25; F25D; F25D21/00; F25D21/02; F25D21/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
An air conditioning system, comprising: an air duct for confining a stream of air; means for forcing said stream through said duct; an air permeable refrigerant evaporator in said duct for chilling said air; an air pressure differential sensor means in communication simultaneously with opposite sides of said evaporator means for sensing the pressure drop of air passing through the evaporator; and means for mounting said sensor means entirely on said evaporator and separate from said duct.
Claim 2
Dependent Claim
77 words
An air conditioning system, comprising: an air duct for confining a stream of air; means for forcing said stream through said duct; an air permeable refrigerant evaporator in said duct for chilling said air; an air pressure differential sensor means in communication simultaneously with opposite sides of said evaporator means for sensing the pressure drop of air passing through the evaporator; and means for mounting said sensor means entirely on said evaporator and separate from said duct.
Claim 3
Dependent Claim
47 words
The air conditioning system of claim 1 wherein saId air pressure differential sensor comprises a pressure responsive member having separate parts on said opposite sides of the evaporator means and provided with spaced air access taps extending along each part, each said part substantially spanning said duct.
Claim 4
Dependent Claim
36 words
The air conditioning system of claim 2 wherein said pressure responsive member comprises a U-tube comprising tubular parts on said opposite sides connected by an intermediate tubular bight, said taps being spaced along said tubular parts.
Claim 5
Dependent Claim
17 words
The air conditioning system of claim 3 wherein said taps comprise openings exposed to said air stream.
Claim 6
Dependent Claim
106 words
An air conditioning system, comprising: an air duct for confining a stream of air; means for forcing said stream through said duct; an air permeable refrigerant evaporator means in said duct for chilling said air, said evaporator means comprising an A-coil having an apex and side coils diverging therefrom in the direction opposite to that of said air stream flow; an air pressure differential sensor means in communication simultaneously with opposite sides of said evaporator means at said apex for sensing the pressure drop of air passing through the evaporator; and means for mounting said sensor means entirely on said evaporator and separate from said duct.
Claim 7
Dependent Claim
106 words
An air conditioning system, comprising: an air duct for confining a stream of air; means for forcing said stream through said duct; an air permeable refrigerant evaporator means in said duct for chilling said air, said evaporator means comprising an A-coil having an apex and side coils diverging therefrom in the direction opposite to that of said air stream flow; an air pressure differential sensor means in communication simultaneously with opposite sides of said evaporator means at said apex for sensing the pressure drop of air passing through the evaporator; and means for mounting said sensor means entirely on said evaporator and separate from said duct.
Claim 8
Dependent Claim
47 words
The air conditioning system of claim 5 wherein said air pressure differential sensor comprises a pressure responsive member having separate parts on said opposite sides of the evaporator means and provided with spaced air access taps extending along each part, each said part substantially spanning said duct.
Claim 9
Dependent Claim
35 words
The air conditioning system of claim 6 wherein said pressure responsive member comprises a U-tube comprising tubular parts on said opposite sides connected by an intermediate bight, said taps being spaced along said tubular parts.
Claim 10
Dependent Claim
17 words
The air conditioning system of claim 6 wherein said taps comprise openings exposed to said air stream.
Claim 11
Dependent Claim
23 words
The air conditioning system of claim 6 wherein said evaporator is provided with bracket means on which said pressure responsive member is mounted.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |