Stacked-type, multi-flow heat exchangers

• US 6,823,933 B2
• Filed: 02/20/2002
• Issued: 11/30/2004
• Est. Priority Date: 03/08/2001
• Status: Expired due to Fees

• Current Assignee: Sanden Corporation (Hisense Home Appliances Group Co., Ltd.)
• Original Assignee: Sanden Corporation (Hisense Home Appliances Group Co., Ltd.)
• Inventors: Chiba, Tomohiro
• Primary Examiner(s): Leo, Leonard R.
• Application Number:
  US10/077,907
• Publication Number:
  US 20020124999A1
• Time in Patent Office: 1,014 Days
• Field of Search: 165/109.1, 165/153, 165/170, 165/177, 165/179, 165/183, 165/176
• US Class Current: 165/153
• CPC Class Codes: F28D 1/0333 the plates having integrated connecting members
• CPC Class Codes: F28F 17/005 Means for draining condensates from heat exchangers, e.g. from evaporators F28B9/08 takes precedence
• CPC Class Codes: F28F 3/025 the means being corrugated, plate-like elements
• CPC Class Codes: F28F 3/04 the means being integral with the element

Abstract

A stacked-type, multi-flow heat exchanger includes a plurality of heat transfer tubes. Each of the heat transfer tubes includes a first tube plate and a second tube plate connected to the first tube plate, such that the first tube plate and the second tube plate form a refrigerant path within the heat transfer tube. Each of the heat transfer tubes also includes an inner fin having a wave shape, positioned within the refrigerant path and extending in a longitudinal direction along the refrigerant path. Moreover, the heat exchanger includes a plurality of outer fins. The plurality of outer fins and the plurality of heat transfer tubes are stacked alternately. The heat exchanger further includes a plurality of projection portions formed on the first tube plates and the second tube plates, such that the projection portions project into the refrigerant path and extend in an oblique direction relative to the inner fin. Further, the inner fin is connected to the plurality of projection portions.

Claims

1. A stacked-type, multi-flow heat exchanger comprising:

a plurality of heat transfer tubes, wherein each of said heat transfer tubes comprises;

a first tube plate;

a second tube plate connected to said first tube plate, wherein said first tube plate and said second tube plate form a refrigerant path within said heat transfer tube; and

an inner fin having a wave shape, wherein said inner fin is positioned within said refrigerant path and extends in a longitudinal direction along said refrigerant path;

a plurality of outer fins, wherein said plurality of outer fins and said plurality of heat transfer tubes are stacked alternately;

a plurality of continuous projection portions formed on at least one of said first tube plates and on at least one of said second tube plates, wherein said plurality of projection portions project into said refrigerant path and extend in an oblique direction relative to said inner fin, said inner fin is connected to said plurality of projection portions, and each of said plurality of projection portions are positioned across the entire width of said refrigerant path; and

a plurality of recess portions, wherein said plurality of recess portions are formed in a side of at least one of said tube plates opposite and corresponding to said plurality of projection portions.

2. The stacked-type, multi-flow heat exchanger of claim 1 wherein said plurality of projection portions are formed by deforming said at least one first tube plate and said at least one second tube plate.

6. The stacked-type, multi-flow heat exchanger of claim 1, further comprising a drain path, wherein said plurality of recess portions are in fluid communication with said drain path.

4. A stacked-type, multi-flow heat exchanger comprising:

a plurality of heat transfer tubes, wherein each of said heat transfer tubes comprises;

a tube plate, wherein said tube plate comprises a flange portion positioned along a center axis of said tube plate, such that when said tube plate is folded along said center axis, said flange portion forms a refrigerant path within said heat transfer tube; and

an inner fin having a wave shape, wherein said inner fin is positioned within said refrigerant path and extends in a longitudinal direction along said refrigerant path;

a plurality of outer fins, wherein said plurality of outer fins and said plurality of heat transfer tubes are stacked alternately;

a plurality of continuous projection portions formed on at least one of said tube plates wherein said plurality of projection portions project into said refrigerant path and extend in an oblique direction relative to said inner fin, said inner fin is connected to said plurality of projection portions, and each of said plurality of projection portions are positioned across the entire width of said refrigerant path; and

a plurality of recess portions, wherein said plurality of recess portions are formed in a side of at least one of said tube plates opposite and corresponding to said plurality of projection portions.

3. The stacked-type, multi-flow heat exchanger of claim 4, further comprising a drain path, wherein said plurality of recess portions are in fluid communication with said drain path.

5. The stacked-type, multi-flow heat exchanger of claim 4, wherein said plurality of projection portions are formed by deforming said at least one tube plate.