Finned heat exchanger
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHitoshi Motegi, Shoichi Yokoyama, Osamu Aoyagi
Life of this patent
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Abstract
A finned heat exchanger includes a plurality of elongated fins which are arranged at a predetermined interval in parallel with one another such that air flows between neighboring ones of the fins in a predetermined direction. A plurality of heat transfer tubes which contain refrigerant passing therethrough are orthogonally inserted through the fins so as to be arranged in a plurality of columns on the fins. When the finned heat exchanger is operated for condensation, the heat transfer tubes are provided in two paths in the vicinity of an inlet for the refrigerant and are provided in one path in the vicinity of an outlet for the refrigerant, such that the heat transfer tubes of the one path occupy about 5 to 30% of all the heat transfer tubes.
Claims14
A finned heat exchanger comprising:
- a plurality of elongated fins arranged at a predetermined interval parallel with one another, such that air can flow in a predetermined direction between adjacent said fins;
- a plurality of heat transfer tubes orthogonally extending through said fins and arranged in at least two columns including a relatively upstream column with regard to said predetermined direction and a relatively downstream column with regard to said predetermined direction, said columns being spaced from each other in said predetermined direction, and said tubes being interconnected such that refrigerant flows therethrough from an inlet to an outlet via two paths in the vicinity of said inlet and a single path in the vicinity of said outlet, said tubes of said single path comprising about 5 to 30% of all of said tubes;
- said tubes of said single path being located in said relatively upstream column;
- one of said tubes to have pass therethrough the refrigerant in a subcooled liquid state or a superheated gaseous state being located in a first said column;
- each said fin having heat insulation in a central portion of a face of said each fin at a location between said one tube and an adjacent tube of an adjacent said column of tubes;
- and
- said heat insulation comprises a plurality of cut portions in alignment and separated by uncut portions;
- and
- said cut portions being substantially equal in length, and said uncut portions being substantially equal in length, each said fin having an overall length, said overall length divided by a sum of said equal length of said cut portions and said equal length of said uncut portions resulting in a remainder, and one of said cut portions being lengthened by a distance equal to said remainder, said one cut portion being adjacent to and downstream of said tubes of said single path.
A finned heat exchanger comprising:
- a plurality of elongated fins arranged at a predetermined interval parallel with one another, such that air can flow in a predetermined direction between adjacent said fins;
- a plurality of heat transfer tubes orthogonally extending through said fins and arranged in at least two columns including a relatively upstream column with regard to said predetermined direction and a relatively downstream column with regard to said predetermined direction, said columns being spaced from each other in said predetermined direction, and said tubes being interconnected such that refrigerant flows therethrough from an inlet to an outlet via two paths in the vicinity of said inlet and a single path in the vicinity of said outlet, said tubes of said single path comprising about 5 to 30% of all of said tubes;
- said inlet being formed by two said tubes of said two paths and located in said relatively downstream column;
- said tubes of said single path being located in said relatively upstream column adjacent said two tubes of said two paths that form said inlet;
- and
- one of said tubes to have pass therethrough the refrigerant in a subcooled liquid state or a superheated gaseous state being located in a first said column, and each said fin has heat insulation in a central portion of a face of said each fin at a location between said one tube and an adjacent tube of an adjacent said column of tubes, said heat insulation comprising a plurality of cut portions in alignment and separated by uncut portions, most of said cut portions being substantially equal in length, and said uncut portions being substantially equal in length, each said fin having an overall length, said overall length divided by a sum of said equal length of most of said cut portions and said equal length of said uncut portions resulting in a remainder, and one of said cut portions being lengthened by a distance equal to said remainder.
Dependencies are inferred from the claim text.