# US 8,783,335 B2 · Condenser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,335 B2 - Document ID: US8783335B2 - Status: Granted - Kind: B2 - Application number: 13/064,699 - Filed: 2011-04-11 - Published: 2011-10-20 - Granted: 2014-07-22 - Earliest claimed: 2010-04-16 - Assignees: Showa Denko K.K. - Applicants: Shingo Suzuki; Kazumi Tokizaki; Yoshihiko Seno; Takayuki Fujii - Inventors: Shingo Suzuki; Kazumi Tokizaki; Yoshihiko Seno; Takayuki Fujii - Web page: https://patentgrep.com/patent/US8783335B2 ## CPC - F28D 1/05391: {with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators} - F25B 39/04: Condensers - F28F 9/02: Header boxes; End plates - F28F 9/0243: {Header boxes having a circular cross-section} - F28F 19/00: Preventing the formation of deposits or corrosion, e.g. by using filters {or scrapers} - F25B 2339/041: of evaporative condensers - F25B 2339/044: Condensers with an integrated receiver - F28F 2009/0285: {Other particular headers or end plates} - F28F 2240/00: Spacing means - F28F 2265/00: Safety or protection arrangements; Arrangements for preventing malfunction - F28F 2275/04: by brazing - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract A first header tank to which first heat exchange tubes of third and fourth heat exchange paths are connected and a second header tank to which second heat exchange tubes of first and second heat exchange paths are connected are provided at one end of a condenser. The upper end of the first header tank is located above the lower end of the second header tank. The first header tank has a function of separating gas and liquid and storing the liquid. The first heat exchange tubes have projecting portions at their ends located on the side toward the first header tank. A corrosion prevention member having a function of corroding sacrificially for the first heat exchange tubes is disposed in a clearance between the projecting portion of the upper-end first heat exchange tube and the lower end of the second header tank. ## Claims ### Claim 1 A condenser comprising a plurality of heat exchange tubes disposed in parallel such that the heat exchange tubes are spaced apart from one another in a vertical direction and extend in a left-right direction; header tanks which extend in the vertical direction and to which left and right end portions of the heat exchange tubes are connected; and fins each disposed between and brazed to heat exchange tubes adjacent to each other in the vertical direction, in which a plurality of heat exchange paths each formed by a plurality of heat exchange tubes successively arranged in the vertical direction are juxtaposed in the vertical direction, wherein first and second header tanks are provided at a left or right end of the condenser, first heat exchange tubes which form at least one heat exchange path located at a lower side being connected to the first header tank, and second heat exchange tubes which form a remaining heat exchange path(s) provided above the heat exchange path formed by the first heat exchange tubes connected to the first header tank being connected to the second header tank; the first header tank is disposed on the outer side of the second header tank with respect to the left-right direction, has an upper end located above a lower end of the second header tank, and has a function of separating gas and liquid from each other and storing the liquid; the first heat exchange tubes connected to the first header tank have projecting portions at their ends located on the side toward the first header tank, the projecting portions extending outward, with respect to the left-right direction, of second-header-tank-side end portions of the second heat exchange tubes connected to the second header tank; and a corrosion prevention member having a function of corroding sacrificially for the first heat exchange tubes is disposed in a clearance between the projecting portion of an upper-end first heat exchange tube and the lower end of the second header tank. ### Claim 2 A condenser comprising a plurality of heat exchange tubes disposed in parallel such that the heat exchange tubes are spaced apart from one another in a vertical direction and extend in a left-right direction; header tanks which extend in the vertical direction and to which left and right end portions of the heat exchange tubes are connected; and fins each disposed between and brazed to heat exchange tubes adjacent to each other in the vertical direction, in which three or more exchange paths each formed by a plurality of heat exchange tubes successively arranged in the vertical direction are juxtaposed in the vertical direction, wherein first and second header tanks are provided at a left or right end of the condenser, first heat exchange tubes which form at least two heat exchange paths successively arranged and including a heat exchange path at a lower end of the condenser being connected to the first header tank, and second heat exchange tubes which form a heat exchange path(s) provided above the heat exchange paths formed by the first heat exchange tubes connected to the first header tank being connected to the second header tank; the first header tank is disposed on the outer side of the second header tank with respect to the left-right direction, has an upper end located above a lower end of the second header tank, and has a function of separating gas and liquid from each other and storing the liquid; the first heat exchange tubes connected to the first header tank have projecting portions at their ends located on the side toward the first header tank, the projecting portions extending outward, with respect to the left-right direction, of second-header-tank-side end portions of the second heat exchange tubes connected to the second header tank; and a corrosion prevention member having a function of corroding sacrificially for the first heat exchange tubes is disposed in a clearance between the projecting portion of an upper-end first heat exchange tube and the lower end of the second header tank. ### Claim 3 (depends on 2) A condenser according to claim 2, wherein an upper-end heat exchange path of the heat exchange paths formed by the first heat exchange tubes connected to the first header tank and the heat exchange path(s) formed by the second heat exchange tubes connected to the second header each serve as a refrigerant condensation path for condensing refrigerant, and the heat exchange paths formed by the first heat exchange tubes connected to the first header tank, excluding the upper-end heat exchange path, each serves as a refrigerant supper-cooling path for supper-cooling refrigerant. ### Claim 4 (depends on 2) A condenser according to claim 2, wherein the first heat exchange tubes which form at least two heat exchange paths are connected to the first header tank, and the second heat exchange tubes which form-at least one heat exchange path are connected to the second header tank. ### Claim 5 A condenser comprising a plurality of heat exchange tubes disposed in parallel such that the heat exchange tubes are spaced apart from one another in a vertical direction and extend in a left-right direction; header tanks which extend in the vertical direction and to which left and right end portions of the heat exchange tubes are connected; and fins each disposed between and brazed to heat exchange tubes adjacent to each other in the vertical direction, in which two or more heat exchange paths each formed by a plurality of heat exchange tubes successively arranged in the vertical direction are juxtaposed in the vertical direction, wherein first and second header tanks are provided at a left or right end of the condenser, first heat exchange tubes which form a heat exchange path at a lower end of the condenser being connected to the first header tank, and second heat exchange tubes which form the heat exchange path(s) other than the heat exchange path at the lower end being connected to the second header tank; the first header tank is disposed on the outer side of the second header tank with respect to the left-right direction, has an upper end located above a lower end of the second header tank, and has a function of separating gas and liquid from each other and storing the liquid; the first heat exchange tubes connected to the first header tank have projecting portions at their ends located on the side toward the first header tank, the projecting portions extending outward, with respect to the left-right direction, of second-header-tank-side end portions of the second heat exchange tubes connected to the second header tank; and a corrosion prevention member having a function of corroding sacrificially for the first heat exchange tubes is disposed in a clearance between the projecting portion of the upper-end first heat exchange tube and the lower end of the second header tank. ### Claim 6 (depends on 5) A condenser according to claim 5, wherein each of all the heat exchange paths serves as a refrigerant condensation path for condensing refrigerant. ### Claim 7 (depends on 1) A condenser according to claim 1, wherein the corrosion prevention member is a corrugated member which has crest portions extending in an air passage direction, trough portions extending in the air passage direction, and connection portions connecting the crest portions and the trough portions. ### Claim 8 (depends on 7) A condenser according to claim 7, wherein the corrosion prevention member is integrally provided on a fin disposed between the upper-end first heat exchange tube and a second heat exchange tube adjacent to and located above the upper-end first heat exchange tube. ### Claim 9 (depends on 1) A condenser according to claim 1, wherein the corrosion prevention member is formed by means of bending a single plate, and has a space portion which extends in an air passage direction and whose opposite ends are opened. ### Claim 10 (depends on 1) A condenser according to claim 1, wherein the corrosion prevention member is a generally V-shaped plate spring which includes an arcuate portion and arm portions extending from upper and lower ends of the arcuate portion, and the corrosion prevention member is disposed in a clearance between the projecting portion of the upper-end first heat exchange tube and the lower end of the second header tank in a state in which the corrosion prevention member is elastically deformed such that the two arm portions approach each other. ### Claim 11 (depends on 10) A condenser according to claim 10, wherein the lower arm portion of the corrosion prevention member has an engagement portion which comes into engagement with an upstream or downstream side edge portion of the upper-end first heat exchange tube. ### Claim 12 (depends on 10) A condenser according to claim 10, wherein a recess is formed on a lower end surface of the second header tank, and a projection which fits into the recess is provided on the upper arm portion of the corrosion prevention member. ### Claim 13 (depends on 2) A condenser according to claim 2, wherein the corrosion prevention member is a corrugated member which has crest portions extending in an air passage direction, trough portions extending in the air passage direction, and connection portions connecting the crest portions and the trough portions. ### Claim 14 (depends on 5) A condenser according to claim 5, wherein the corrosion prevention member is a corrugated member which has crest portions extending in an air passage direction, trough portions extending in the air passage direction, and connection portions connecting the crest portions and the trough portions. ### Claim 15 (depends on 2) A condenser according to claim 2, wherein the corrosion prevention member is formed by means of bending a single plate, and has a space portion which extends in an air passage direction and whose opposite ends are opened. ### Claim 16 (depends on 5) A condenser according to claim 5, wherein the corrosion prevention member is formed by means of bending a single plate, and has a space portion which extends in an air passage direction and whose opposite ends are opened. ### Claim 17 (depends on 2) A condenser according to claim 2, wherein the corrosion prevention member is a generally V-shaped plate spring which includes an arcuate portion and arm portions extending from upper and lower ends of the arcuate portion, and the corrosion prevention member is disposed in a clearance between the projecting portion of the upper-end first heat exchange tube and the lower end of the second header tank in a state in which the corrosion prevention member is elastically deformed such that the two arm portions approach each other. ### Claim 18 (depends on 5) A condenser according to claim 5, wherein the corrosion prevention member is a generally V-shaped plate spring which includes an arcuate portion and arm portions extending from upper and lower ends of the arcuate portion, and the corrosion prevention member is disposed in a clearance between the projecting portion of the upper-end first heat exchange tube and the lower end of the second header tank in a state in which the corrosion prevention member is elastically deformed such that the two arm portions approach each other.