US3898864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration evaporator coil
Assignee: Tyler Refrigeration Corp
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Filing: 1974-05-17
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Granted: 1975-08-12
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Expires: 1994-05-17
Abstract
Abstract Air refrigeration equipment having in addition to the normal evaporator air inlet area a second air inlet area separated from the first area by a restrictive opening so that when the first air inlet area is blocked by frost, the air will go through the restrictive opening and into the evaporator through the second air inlet area. Located adjacent to the second air inlet area and on the opposite side thereof from the restrictive opening is a frost collecting cavity. The restriction between the first and second inlet areas is so arranged that the frost which is airborne as it passes through the restriction is carried by inertia forces into the frost collecting cavity. This invention permits an increase in the time period between defrost cycles in air refrigeration apparatus.
Inventors
- 👤 Melvin W Steelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:01
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; F; F25; F25B; F25B39/00; F25B39/02; F25D; F25D21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
Air refrigeration apparatus including: an air conducting conduit, an air propulsion means capable of circulating air through said conduit, an air cooling means located in said conduit having a first air inlet area, a second air inlet area and an air outlet area, said first inlet area being located in a plane normal to the direction of air flow through said conduit, said second air inlet area being located in a plane normal to said first inlet area, restriction means between said first and second air inlet areas, a plenum chamber lying between said restriction means and said second air inlet area, whereby in the absence of frosting conditions, the major volume of the air flows through said first inlet area and when, said first inlet becomes clogged with frost the restriction means permits a greater volume of the air to flow through said second inlet area to said cooling element to thereby, provide for entry of air into said cooling element when the first inlet area becomes clogged with frost.
Claim 2
Dependent Claim
171 words
Air refrigeration apparatus including: an air conducting conduit, an air propulsion means capable of circulating air through said conduit, an air cooling means located in said conduit having a first air inlet area, a second air inlet area and an air outlet area, said first inlet area being located in a plane normal to the direction of air flow through said conduit, said second air inlet area being located in a plane normal to said first inlet area, restriction means between said first and second air inlet areas, a plenum chamber lying between said restriction means and said second air inlet area, whereby in the absence of frosting conditions, the major volume of the air flows through said first inlet area and when, said first inlet becomes clogged with frost the restriction means permits a greater volume of the air to flow through said second inlet area to said cooling element to thereby, provide for entry of air into said cooling element when the first inlet area becomes clogged with frost.
Claim 3
Dependent Claim
22 words
Air refrigerating apparatus as claimed in claim 1 having: a frost collection cavity into which frost is propelled by an inertial force.
Claim 4
Dependent Claim
42 words
Air refrigeration apparatus as claimed in claim 1 in which: the cross section area of the air restriction means between said first and said second air inlet areas is less than 1/3 the cross section area of said first air inlet area.
Claim 5
Dependent Claim
44 words
Air refrigeration apparatus as claimed in claim 1 in which: said restriction means between said first and said second air inlet areas lies in a plane parallel to the plane of said first inlet and normal to the plane of said second inlet area.
Claim 6
Dependent Claim
17 words
Air refrigeration apparatus as claimed in claim 1 including: a frost collecting cavity in said plenum chamber.
Claim 7
Dependent Claim
52 words
Air refrigeration apparatus as claimed in claim 5 in which: said restriction means is located at one end of said plenum chamber, said frost collecting cavity is located in the other end of said plenum chamber and, said second inlet area is located between said restriction means and said frost collecting cavity.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |