Integrated heat exchanger

1. An integrated heat exchanger, comprising:

a first heat exchanger; and

a second heat exchanger,

wherein a fitting dented portion is provided at one of a bottom surface of said first heat exchanger and an upper surface of said second heat exchanger, and a fitting protruded portion is provided at the other thereof,

wherein said fitting protruded portion is fitted in said fitting dented portion, whereby said first heat exchanger is integrally connected to said upper surface of said second heat exchanger,

wherein said first heat exchanger includes a pair of horizontally disposed upper and lower tank portions and a plurality of tubes connecting said upper and lower tank portions, and

wherein said second heat exchanger includes a pair of vertically disposed right and left header portions and a plurality of tubes connecting said right and left header portions.

2. The integrated heat exchanger as recited in claim 1 , wherein said fitting protruded portion is fitted in said fitting dented portion via a buffer member made of elastic material.

3. The integrated heat exchanger as recited in claim 2 , wherein at least one downwardly protruded protrusion is provided at said bottom surface of said first heat exchanger, wherein a channel member having a generally U-shaped cross-section is provided at said upper surface of said second heat exchanger so as to extend along a widthwise direction thereof, and wherein said protrusion is fitted in said channel member, whereby said first heat exchanger and said second heat exchanger are connected with each other and almost no gap or no gap is formed between said first and second heat exchangers by said channel member to prevent air passage therebetween.

4. The integrated heat exchanger as recited in claim 1 , wherein at least one downwardly protruded protrusion is provided at said bottom surface of said first heat exchanger, wherein a channel member having a generally U-shaped cross-section is provided at said upper surface of said second heat exchanger so as to extend along a widthwise direction thereof, and wherein said protrusion is fitted in said channel member, whereby said first heat exchanger and said second heat exchanger are connected with each other and almost no gap or no gap is formed between said first and second heat exchangers by said channel member to prevent air passage therebetween.

5. The integrated heat exchanger as recited in claim 1 , wherein a left-hand side fitting protruded portion is provided at one of a bottom surface of said lower tank portion of said first heat exchanger and an upper portion of said left header, and a left-hand side fitting dented portion is provided at the other thereof, wherein a right-hand side fitting protruded portion is provided at one of a right end portion of said bottom surface of said lower tank portion of said first heat exchanger and an upper end portion of said right header of said second heat exchanger, and a right-hand side fitting dented portion is provided at the other thereof, and wherein said left-hand side fitting protruded portion is fitted in said left-hand side fitting dented portion and said right-hand side fitting protruded portion is fitted in said right-hand side fitting dented portion, whereby said first heat exchanger is integrally connected to an upper portion of said second heat exchanger.

6. The integrated heat exchanger as recited in claim 5 , wherein said fitting dented portions are provided at said bottom surfaces of right and left end portions of said lower tank portion of said first heat exchanger, and said fitting protruded portions are provided at upper ends of right and left headers of said second heat exchanger.

7. The integrated heat exchanger as recited in claim 6 , wherein said fitting protruded portion is fitted in said fitting dented portion via a buffer member made of elastic material.

8. The integrated heat exchanger as recited in claim 6 , wherein at least one protrusion is provided at said bottom surface of said lower tank portion of said first heat exchanger, wherein a side plate having a generally U-shaped cross-section is provided between upper portions of said right and left headers of said second heat exchanger, and wherein said protrusion is fitted in said side plate, whereby said first and second heat exchangers are connected with each other and almost no gap or no gap is formed between said first and second heat exchangers by said side plate to prevent air passage therebetween.

9. The integrated beat exchanger as recited in claim 5 , wherein said fitting protruded portion is fitted in said fitting dented portion via a buffer member made of elastic material.

10. The integrated heat exchanger as recited in claim 5 , wherein at least one protrusion is provided at said bottom surface of said lower tank portion of said first heat exchanger, wherein a side plate having a generally U-shaped cross-section is provided between upper portions of said right and left headers of said second heat exchanger, and wherein said protrusion is fitted in said side plate, whereby said first and second heat exchangers are connected with each other and almost no gap or no gap is formed between said first and second heat exchangers by said side plate to prevent air passage therebetween.

11. The integrated heat exchanger as recited in claim 1 , wherein at least one protrusion is provided at said bottom surface of said lower tank portion of said first heat exchanger, wherein a side plate having a generally U-shaped cross-section is provided between upper portions of said right and left headers of said second heat exchanger, and wherein said protrusion is fitted in said side plate, whereby said first and second heat exchangers are connected with each other and almost no gap or no gap is formed between said first and second heat exchangers by said side plate to prevent air passage therebetween.

12. The integrated heat exchanger-as recited in claim 1 , wherein each of said first and second heat exchangers is a heat exchanger for automobiles.

13. The integrated heat exchanger as recited in claim 12 , wherein said first heat exchange is a radiator for use in engine-cooling systems and said second heat exchanger is a condenser for use in air-conditioning systems.

14. An integrated heat exchanger, comprising:

a radiator for use in car engine-cooling systems; and

a condenser for use in car air-conditioning systems, said condenser being integrally connected to said radiator,

wherein said radiator includes a pair of horizontally disposed upper and lower tank portions and a plurality of tubes connecting said tank portions,

wherein said condenser includes a pair of vertically disposed right and left header portions and a pair of tubes connecting said header portions,

wherein fitting dented portions are provided at bottom surfaces of right and left end portions of said lower tank portion of said radiator, and fitting protruded portions are provided at upper ends of right and left headers of said condenser,

wherein said fitting protruded portions are fitted in said fitting dented portions via buffer members made of elastic material, whereby said radiator is integrally connected to an upper portion of said condenser,

wherein at least one protrusion is provided at said bottom surface of said lower tank portion of said radiator, and a side plate having a generally U-shaped cross-section is provided between upper portions of said right and left headers of said condenser, and

wherein said protrusion is fitted in said side plate whereby said first and second heat exchangers are connected with each other and almost no gap or no gap is formed between said radiator and said condenser by said side plate to prevent air passage therebetween.