Tank for heat exchanger

1. A tank for a heat exchanger, the tank comprising:

a tank member having a first slot portion on a first lateral side, the first slot portion defining a first throughhole; and

a base member having a pre-crimped tab on the first lateral side, the pre-crimped tab being bent outward from a longitudinal axis, wherein

the tank member and the base member are fitted together to define an inner cavity therebetween,

the pre-crimped tab is inserted in the first throughhole on the first lateral side,

the base member is crimped to the tank member on a second lateral side, the first slot portion has a curved slope adjacent to the first throughhole and located on an outside from the longitudinal axis across the first throughhole,

the pre-crimped tab includes a tab end and a bent portion,

the tab end extends outward from the bent portion relative to the longitudinal axis

the bent portion is bent outward relative to the longitudinal axis to define a bent curved surface,

the bent curved surface is curved substantially along the curved slope and is at least partially in contact with the curved slope, and

the pre-crimped tab is resiliently in contact with the curved slope to bias the tank member toward the base member.

2. The tank according to claim 1 , wherein

the base member has a crimped portion on the second lateral side, and

the crimped portion is bent inward to the longitudinal axis and crimped to the tank member on the second lateral side.

3. The tank according to claim 1 , wherein

the base member has a crimped tab on the second lateral side,

the tank member has a second slot portion on the second lateral side, the second slot portion having a second throughhole, and

the crimped tab is inserted in the second throughhole, bent outward from the longitudinal axis, and crimped to the tank member on the second lateral side.

4. The tank according to claim 1 , wherein

the tank member and the base member are fitted together by

inserting the pre-crimped tab into the first throughhole, and

rotating the tank member around the pre-crimped tab, which is inserted into and hinged along the first throughhole, relative to the base member to fit contact surfaces of the tank member and the base member together.

5. The tank according to claim 1 , wherein

the base member has a bottom portion equipped with a seal member being elastic and substantially in an O-shape, and

the tank member has a rib substantially in an O-shape and urged onto the seal member.

6. The tank according to claim 1 , wherein the base member has a bottom portion having a plurality of openings each extending through the bottom portion in a thickness direction of the bottom portion.

7. A heat exchanger comprising:

the tank according to claim 1 , wherein the base member has a bottom portion having a plurality of openings each extending through the bottom portion in a thickness direction of the bottom portion;

a plurality of tubes coupled with the plurality of openings, respectively; and

a plurality of fins alternately stacked with the plurality of tubes.

8. A tank for a heat exchanger according to claim 1 , the tank comprising:

a tank member; and

a base member having a pre-crimped portion on a first lateral side, wherein the tank member and the base member are fitted together to define an inner cavity therebetween, by

inserting a lateral end of the tank member inside the pre-crimped portion, and

rotating the tank member relative to the base member along the pre- crimped portion, and

the base member is crimped to the tank member on a second lateral side.

9. A tank for a heat exchanger, the tank comprising:

a tank member having one of a pre-crimped tab and a first slot portion on a first lateral side, the pre-crimped tab being bent outward from a longitudinal axis, the first slot portion defining a first throughhole; and

a base member having another of the pre-crimped tab and the first slot portion on the first lateral side, wherein

the tank member and the base member are fitted together to define an inner cavity therebetween,

the pre-crimped tab is inserted in the first throughhole on the first lateral side, and

one of the tank member and the base member is crimped to another of the tank member and the base member on a second lateral side,

the first slot portion has a curved slope adjacent to the first throughhole and located on an outside from the longitudinal axis across the first throughhole,

the pre-crimped tab includes a tab end and a bent portion,

the tab end extends outward from the bent portion relative to the longitudinal axis

the bent portion is bent outward relative to the longitudinal axis to define a bent curved surface,

the bent curved surface is curved substantially along the curved slope and is at least partially in contact with the curved slope, and

the pre-crimped tab is resiliently in contact with the curved slope to bias one of the tank member and the base member toward another of the tank member and the base member.

10. The tank according to claim 9 , wherein

one of the tank member and the base member has a crimped portion on the second lateral side, and

the crimped portion is bent inward to the longitudinal axis and crimped to the other of the tank member and the base member on the second lateral side.

11. The tank according to claim 9 , wherein

one of the tank member and the base member has a crimped tab on the second lateral side,

another of the tank member and the base member has a second slot portion on the second lateral side, the second slot portion having a second throughhole, and

the crimped tab is inserted in the second throughhole, bent outward from the longitudinal axis, and crimped to the other of the tank member and the base member on the second lateral side.

12. The tank according to claim 9 , wherein

the tank member and the base member are fitted together by

inserting the pre-crimped tab into the first throughhole, and

rotating one of the tank member and the base member around the pre-crimped tab, which is inserted into and hinged along the first throughhole, relative to an other of the tank member and the base member to fit contact surfaces of the tank member and the base member together.

13. The tank according to claim 9 , wherein

the base member has a bottom portion equipped with a seal member being elastic and substantially in an O-shape, and

the tank member has a rib substantially in an O-shape and urged onto the seal member.

14. The tank according to claim 9 , wherein the base member has a bottom portion having a plurality of openings each extending through the bottom portion in a thickness direction of the bottom portion.

15. A heat exchanger comprising:

the tank according to claim 9 , wherein the base member has a bottom portion having a plurality of openings each extending through the bottom portion in a thickness direction of the bottom portion;

a plurality of tubes coupled with the plurality of openings, respectively; and

a plurality of fins alternately stacked with the plurality of tubes.

16. A tank for a heat exchanger according to claim 9 , the tank comprising:

a tank member; and

a base member, wherein

one of the tank member and the base member has a pre-crimped portion on a first lateral side,

the tank member and the base member are fitted together to define an inner cavity therebetween, by

inserting a lateral end of another of the tank member and the base member inside the pre-crimped portion, and

rotating one of the tank member and the base member relative to another of the tank member and the base member along the pre-crimped portion, and

one of the tank member and the base member is crimped to another of the tank member and the base member on a second lateral side.