IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0583764
(2005-03-17)
|
등록번호 |
US-7775067
(2010-09-06)
|
우선권정보 |
JP-2004-076763(2004-03-17); JP-2005-042641(2005-02-18) |
국제출원번호 |
PCT/JP2005/005462
(2005-03-17)
|
§371/§102 date |
20060621
(20060621)
|
국제공개번호 |
WO05/088225
(2005-09-22)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
A heat exchanger has header tanks each including a header forming plate, a tube connecting plate, and an intermediate plate interposed between the two plates, the plates being arranged in superposed layers and brazed to one another. Each of the plates is made from a metal plate by press work. The he
A heat exchanger has header tanks each including a header forming plate, a tube connecting plate, and an intermediate plate interposed between the two plates, the plates being arranged in superposed layers and brazed to one another. Each of the plates is made from a metal plate by press work. The header forming plate has an outward bulging portion. The tube connecting plate has tube insertion holes. The intermediate plate has communication holes causing tube insertion holes to communicate with the interior of each outward bulging portion therethrough. Heat exchange tubes have opposite ends placed into the respective insertion holes and brazed to the respective tube connecting plates. The heat exchanger including such header tanks is reduced in the number of components, can be fabricated with a high work efficiency, and exhibits improved heat exchange performance.
대표청구항
▼
The invention claimed is: 1. A heat exchanger comprising a pair of header tanks arranged as spaced apart from each other; and a plurality of heat exchange tubes arranged in parallel between the pair of header tanks and each having opposite ends joined to the respective header tanks, each of the hea
The invention claimed is: 1. A heat exchanger comprising a pair of header tanks arranged as spaced apart from each other; and a plurality of heat exchange tubes arranged in parallel between the pair of header tanks and each having opposite ends joined to the respective header tanks, each of the heat exchanger header tanks comprising a header forming plate, a tube connecting plate and an intermediate plate interposed between the two plates, the header forming plate, the tube connecting plate and the intermediate plate being arranged in superposed layers and brazed to one another, the header forming plate being provided with an outward bulging portion extending longitudinally thereof and having an opening thereof closed with the intermediate plate, the tube connecting plate being provided at a portion thereof corresponding to the outward bulging portion with a plurality of tube insertion holes arranged longitudinally of the tube connecting plate at a spacing and extending through the thickness thereof, the intermediate plate having communication holes extending through the thickness thereof for causing the respective tube insertion holes of the tube connecting plate to communicate with interior of the outward bulging portion of the header forming plate therethrough, the heat exchange tubes having their opposite ends inserted into the respective tube insertion holes of the pair of header tanks and brazed to the respective header tanks, wherein the header forming plate of the first of the pair of header tanks has a plurality of outward bulging portions aligned longitudinally thereof and spaced apart from each other, and the header forming plate of the second of the pair of header tanks has outward bulging portions one smaller in number to the number of outward bulging portions of the first header tank so as to be opposed to adjacent two outward bulging portions of the first header tank, all the communication holes of the intermediate plate of the first header tank in communication with each of the outward bulging portions of the first header tank are held in communication by communication portions formed in the intermediate plate, all the communication holes of the intermediate plate of the second header tank in communication with each of the outward bulging portions of the second header tank are held in communication by communication portions formed in the intermediate plate, the first header tank has a refrigerant inlet communicating with the outward bulging portion at one end thereof and a refrigerant outlet communicating with the outward bulging portion at the other end thereof, the header forming plate of each of the header tanks has a wall thickness T, the outward bulging portion of each header tank has a bulging height of H, and H/T is in the range of 0.5 to 1.5. 2. A heat exchanger according to claim 1 wherein the header forming plate, the tube connecting plate and the intermediate plate are each made from a metal plate by press work. 3. A heat exchanger according to claim 1 wherein the tube connecting plate is integrally provided at each of opposite side edges thereof with a cover wall covering a boundary between the header forming plate and the intermediate plate over the entire length thereof, and the cover wall is brazed to corresponding side faces of the header forming plate and the intermediate plate. 4. A heat exchanger according to claim 3 wherein the cover wall is integrally provided at an outer end thereof with an engaging portion engaged with an outer surface of the header forming plate and brazed to the header forming plate. 5. A heat exchanger according to claim 1 wherein the first header tank is two in the number of outward bulging portions therein, and the second header tank is one in the number of outward bulging portion therein. 6. A supercritical refrigeration cycle which comprises a compressor, a gas cooler, an evaporator, a pressure reducing device and an intermediate heat exchanger for subjecting refrigerant flowing out from the gas cooler and refrigerant flowing out from the evaporator to heat exchange, and wherein a supercritical refrigerant is used, the gas cooler comprising a heat exchanger according to claim 1. 7. A vehicle having installed therein a supercritical refrigeration cycle according to claim 6 as a vehicle air conditioner. 8. A heat exchanger comprising: a pair of header tanks arranged as spaced apart from each other; and a plurality of heat exchange tubes arranged in parallel between the pair of header tanks and each having opposite ends joined to the respective header tanks, each of the heat exchanger header tanks comprising a header forming plate, a tube connecting plate and an intermediate plate interposed between the two plates, the header forming plate, the tube connecting plate and the intermediate plate being arranged in superposed layers and brazed to one another, the header forming plate being provided with an outward bulging portion extending longitudinally thereof and having an opening thereof closed with the intermediate plate, the tube connecting plate being provided at a portion thereof corresponding to the outward bulging portion with a plurality of tube insertion holes arranged longitudinally of the tube connecting plate at a spacing and extending through the thickness thereof, the intermediate plate having communication holes extending through the thickness thereof for causing the respective tube insertion holes of the tube connecting plate to communicate with interior of the outward bulging portion of the header forming plate therethrough, the heat exchange tubes having their opposite ends inserted into the respective tube insertion holes of the pair of header tanks and brazed to the respective header tanks, wherein the header forming plate of the first of the pair of header tanks has four outward bulging portions arranged widthwise thereof at a spacing and longitudinally thereof at a spacing, the header forming plate of the second of the pair of header tanks has two outward bulging portions arranged side by side as spaced apart widthwise thereof and opposed to the respective longitudinally adjacent pairs of outward bulging portions of the first header tank, the tube connecting plate of each of the header tanks is provided with a plurality of tube insertion holes at each of widthwise opposite side portions thereof, the intermediate plate of each header tank is provided with a plurality of communication holes at each of widthwise opposite side portions thereof, the communication holes of the intermediate plate of the first header tank in communication with one of the pair of outward bulging portions arranged widthwise of the first header tank and the communication holes of the intermediate plate in communication with the other outward bulging portion of said pair are held in communication by first communication holes formed in the intermediate plate to thereby cause said pair of outward bulging portions to communicate with each other, all the communication holes of the intermediate plate communicating with the other pair of outward bulging portions are held in communication by second communication portions formed in the intermediate plate, all the communication holes of the intermediate plate of the second header tank in communication with each of the outward bulging portions of the second header tank are held in communication by communication portions formed in the intermediate plate, the first header tank is provided with a refrigerant inlet communicating with one of said other pair of outward bulging portions and a refrigerant outlet communicating with the other outward bulging portion of said other pair, the header forming plate of each of the header tanks has a wall thickness T, the outward bulging portions of each header tank have a bulging height of H, and H/T is in the range of 1.0 to 2.0. 9. A supercritical refrigeration cycle which comprises a compressor, a gas cooler, an evaporator, a pressure reducing device and an intermediate heat exchanger for subjecting refrigerant flowing out from the gas cooler and refrigerant flowing out from the evaporator to heat exchange, and wherein a supercritical refrigerant is used, the evaporator comprising a heat exchanger according to claim 8. 10. A vehicle having installed therein a supercritical refrigeration cycle according to claim 9 as a vehicle air conditioner.
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