EP0085381A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wrapped fin heat exchanger circuiting
Assignee: Carrier Corp
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Filing: 1983-01-24
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Granted: —
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Expires: 2003-01-24
Abstract
Abstract A wrapped fin heat exchanger having a plurality of circuits (A, B, C, D, E) is disclosed. A bottom circuit (E) of the wrapped fin heat exchanger (50) is arranged in multiple rows and has circuiting to provide hot gaseous refrigerant to the areas of highest frost concentration during operation in the defrost mode. The circuiting allows for hot gaseous refrigerant to enter an inner loop (52) and then flow downwardly to the bottom of the coil where the highest frost accumulation is concentrated. Regrigerant then flows upwardly through the outer row (54) of the coil to an intermediate transition loop (37). The refrigerant then flows upwardly through the inner row and then back to the outer row and downwardly to an inner stop loop (38) before being connected to the header. Hence, by circuiting the heat exchanger in the appropriate configuration it is possible to achieve the optimal frost melting and heat transfer arrangement.
Inventors
- 👤 Rudy E. Haas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:57
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B47/00; F25B47/02; F25B47/022; F28; F28D; F28D7/00; F28D7/02; F28D7/024; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
A wrapped fin heat exchanger (50) for transferring heat energy between a fluid flowing through the heat exchanger and a gas flowing thereover and formed from a continuous length of tubing having a fin material wrapped thereabout having a plurality of circuits (A, B, C, D) formed from the wrapped fin tubing; at least one circuit being formed from a plurality of loops (52) of tubing, said loops being arranged to have an inner set of loops (52) and an outer set of loops (54); a first header (80) connected to a first end of said circuit; and a second header (90) connected to a second end of said circuit; which is characterized by a bottom circuit (E) positioned vertically below the other circuits, said bottom circuit having inner and outer sets of loops arranged vertically and said circuit having exterior loops at the vertical ends of said circuit and at least one interior loop between the exterior loops; first means (90E) for connecting the first header (80) to a first end of the bottom circuit at an interior loop (38) of the inner set of loops; and second means (80E) or connecting the second header to a second end of the bottom circuit at an interior loop (36) of the outer set of loops.
Claim 2
Dependent Claim
215 words
A wrapped fin heat exchanger (50) for transferring heat energy between a fluid flowing through the heat exchanger and a gas flowing thereover and formed from a continuous length of tubing having a fin material wrapped thereabout having a plurality of circuits (A, B, C, D) formed from the wrapped fin tubing; at least one circuit being formed from a plurality of loops (52) of tubing, said loops being arranged to have an inner set of loops (52) and an outer set of loops (54); a first header (80) connected to a first end of said circuit; and a second header (90) connected to a second end of said circuit; which is characterized by a bottom circuit (E) positioned vertically below the other circuits, said bottom circuit having inner and outer sets of loops arranged vertically and said circuit having exterior loops at the vertical ends of said circuit and at least one interior loop between the exterior loops; first means (90E) for connecting the first header (80) to a first end of the bottom circuit at an interior loop (38) of the inner set of loops; and second means (80E) or connecting the second header to a second end of the bottom circuit at an interior loop (36) of the outer set of loops.
Claim 3
Dependent Claim
29 words
The apparatus as set forth in claim 1 and further characterized by an intermediate transition loop (37) connecting the inner set of loops to the outer set of loops.
Claim 4
Dependent Claim
38 words
The apparatus as set forth in claim 2 and further characterized by a bottom transition loop (34) and a top transition loop (36), each transition loop connecting the inner set of loops to the outer set of loops.
Claim 5
Dependent Claim
70 words
The apparatus as set forth in claim 3 which is further characterized by an interior loop in the inner set being connected to the second connecting means and the bottom transition loop such that a fluid supplied from the second header enters an interior loop of the inner set and flows downwardly to the bottom transition loop and then through the bottom transition loop to the outer set of loops.
Claim 6
Dependent Claim
41 words
The apparatus as set forth in claim 3 which is further characterized by either the first header (80) or the second header (90) being an inlet header to the circuit and the other header being the discharge header from the circuit.
Claim 7
Dependent Claim
197 words
A refrigerant carrying circuit (E) forming a portion of a heat exchanger (50) including a plurality of loops (52, 54) of tubing, each loop extending about the perimeter of the heat exchanger and the tubing being wrapped fin tubing having a refrigerant carrying tube and fin material wrapped about the exterior of the tube; an outer portion of the circuit formed from a set of loops (54) located to form an outer set of loops; an inner portion of the circuit formed from a set of loops (52) located to form an inner set of loops and spaced inwardly from the outer set of loops; a first header (80) connected to the circuit for conducting refrigerant between the first header and the circuit; a second header (90) connected to the circuit for conducting refrigerant between the second header and the circuit; which is characterized by the first header being connected to the circuit at the inner portion of the circuit; the second header being connected to the circuit at the outer portion of the circuit; and a transition portion (37) connecting the outer set of loops to the inner set of loops intermediate each set of loops.
Claim 8
Dependent Claim
197 words
A refrigerant carrying circuit (E) forming a portion of a heat exchanger (50) including a plurality of loops (52, 54) of tubing, each loop extending about the perimeter of the heat exchanger and the tubing being wrapped fin tubing having a refrigerant carrying tube and fin material wrapped about the exterior of the tube; an outer portion of the circuit formed from a set of loops (54) located to form an outer set of loops; an inner portion of the circuit formed from a set of loops (52) located to form an inner set of loops and spaced inwardly from the outer set of loops; a first header (80) connected to the circuit for conducting refrigerant between the first header and the circuit; a second header (90) connected to the circuit for conducting refrigerant between the second header and the circuit; which is characterized by the first header being connected to the circuit at the inner portion of the circuit; the second header being connected to the circuit at the outer portion of the circuit; and a transition portion (37) connecting the outer set of loops to the inner set of loops intermediate each set of loops.
Claim 9
Dependent Claim
105 words
The apparatus as set forth in claim 6 and further characterized by the inner set of loops including a bottom transition loop (34) connecting the inner set of loops to the outer set of loops and a top transition loop (36) connecting the inner set of loops to the outer set of loops and wherein the first and second headers are connected, the first header (80) to a loop in the outer set of loops and the second header (90) to a loop in the inner set of loops, both of said loops being located between the top transition loop and the bottom transition loop.
Claim 10
Dependent Claim
109 words
The apparatus as set forth in claim 6 and further characterized by the circuit being incorporated within a reversible refrigeration circuit and wherein in one mode of operation refrigerant is supplied from the second header (90) to an interior inner loop (32) first and then flows downwardly through the inner set of loops to the bottom transition loop (34) and then upwardly through the outer set of loops to the intermediate transition loop (37) and then upwardly through a portion of the inner set of loops to the top transition loop (36) and then downwardly through the outer set of loops to the connection (38) to the first header.
Claim 11
Dependent Claim
44 words
The apparatus as set forth in claim 6 and further characterized by at least one additional refrigerant carrying circuit (A, B, C, D) and wherein the additional circuit is connected to the first header and the second header in parallel with the original circuit.
References Cited (Backward Citations)
No citation records indexed.
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