US3786227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger defrost apparatus
Assignee: Thermo King Corp
•
Filing: 1972-11-15
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Granted: 1974-01-15
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Expires: 1992-11-15
Abstract
Abstract A plate and tube heat exchanger assembly includes a plurality of coolant transporting tubes and a plurality of spaced plates to be periodically defrosted. The tubes pass through the plates and are in heat conducting relationship therewith at junction points with the plates. At least one but less than all of the plates may be modified, according to the instant invention, to include an electric heating element disposed at one end thereof for imparting heat through the plate and to the tubes and other plates at the junction points therebetween at predetermined times for periodic defrosting. The thickness of the plates having heating elements associated therewith are of a greater thickness than the remainder of the plates.
Inventors
- 👤 R Seipp
- 👤 Clure H Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:55
CPC Classifications
H; H05; H05B; H05B3/00; F; F25; F25D; F25D21/00; F25D21/06; F25D21/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A plate tube heat exchanger assembly including a plurality of parallel coolant transporting tubes and a plurality of spaced plates to be periodically defrosted and extending transversely from said tubes, said tubes passing through said plates and being in heat conducting relationship therewith at junction points with said plates, a select number of said parallel plates comprising less than all of said plurality of spaced plates having respective heat imparting means connected thereto, the thickness of each of said select number of plates being greater than the relative thickness of the remainder of the plates not having said heat imparting means, whereby heat is transferred through said select number of plates of increased thickness and to said tubes at the junction points therebetween at predetermined times for periodic defrosting.
Claim 2
Dependent Claim
129 words
A plate tube heat exchanger assembly including a plurality of parallel coolant transporting tubes and a plurality of spaced plates to be periodically defrosted and extending transversely from said tubes, said tubes passing through said plates and being in heat conducting relationship therewith at junction points with said plates, a select number of said parallel plates comprising less than all of said plurality of spaced plates having respective heat imparting means connected thereto, the thickness of each of said select number of plates being greater than the relative thickness of the remainder of the plates not having said heat imparting means, whereby heat is transferred through said select number of plates of increased thickness and to said tubes at the junction points therebetween at predetermined times for periodic defrosting.
Claim 3
Dependent Claim
16 words
The invention of claim 1, wherein the means for imparting heat is a tubular electric heater.
Claim 4
Dependent Claim
22 words
The invention of claim 1, wherein said heat imparting means is disposed at one end of said respective plates by a clamp.
Claim 5
Dependent Claim
37 words
The invention of claim 1, wherein said plates having respective heat imparting means include a foot member extending transversely from said plates to adapt said plates to be secured to a heat exchanger defrost and collection pan.
References Cited (Backward Citations)
US1073813A
Cited
US2492397A
Cited
US2529215A
Cited
DE1127062B
Cited
US3099914A
Cited
US3138006A
Cited
US3358467A
Cited
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 |