Heat exchanger
First Claim
1. A heat exchanger comprising:
- a plurality of tubes arranged in parallel with each other;
sheet-like fins attached to the plurality of tubes to bridge intervals between facing tubes, the sheet-like fins performing heat exchange between a first fluid flowing inside of the plurality of tubes and a second fluid flowing in contact with outer surfaces of the tubes and the fins;
whereina meandering projection is formed in each of said fins, the meandering projection extending over an entire width of the fin in a direction generally parallel with a flow direction of the second fluid to form a generally rectangular flow passage which extends through a respective interval between facing tubes in the direction generally parallel to the flow direction of the second fluid.
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Accused Products
Abstract
Fins such as corrugated fins or plate fins are formed with meandering projections. A fluid such as air strikes bent parts of the meandering projections or grooves at the back sides while flowing along the fins and becomes turbulent and therefore flows while meandering so as to be directed toward the surfaces of tubes, so flows not only contacting the front and back surfaces of the fins without leaving any dead space, but also striking the surfaces of the tubes. Due to this, no boundary layers are formed at the surfaces of the fins or tubes, so heat conduction is promoted and therefore the heat exchange efficiency between a first fluid such as a refrigerant flowing through the insides of the tubes and a second fluid such as air flowing outside is remarkably improved.
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Citations
18 Claims
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1. A heat exchanger comprising:
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a plurality of tubes arranged in parallel with each other; sheet-like fins attached to the plurality of tubes to bridge intervals between facing tubes, the sheet-like fins performing heat exchange between a first fluid flowing inside of the plurality of tubes and a second fluid flowing in contact with outer surfaces of the tubes and the fins;
whereina meandering projection is formed in each of said fins, the meandering projection extending over an entire width of the fin in a direction generally parallel with a flow direction of the second fluid to form a generally rectangular flow passage which extends through a respective interval between facing tubes in the direction generally parallel to the flow direction of the second fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A heat exchanger, comprising:
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a plurality of flat tubes arranged in parallel with each other; and a plurality of corrugated fins disposed between adjacent pairs of the flat tubes so as to provide parallel arranged fin plates bridging the flat tubes, wherein each of the fin plates are formed with a first flat surface adjacent to and perpendicular to the flat tube, a second flat surface perpendicular to the flat tube, and a side surface between the first and second flat surfaces, the side surface facing a respective flat tube and continuously extending from an upstream edge to a downstream edge of the fin plate along a stream direction and smoothly meandering in wave-shape along the stream direction so that the side surface and the flat tube define a stream passage that repeats narrowing toward the flat tube and widening from the flat tube.
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Specification