Fluid-heating device and manufacturing method thereof
A fluid-heating device for heating fluid with a heater includes: a heating portion that is molded so as to cover the surrounding of the heater; and a support body integrally cast into the heating portion, the heating portion being molded in a state in which the heater is supported by the support body in a die for molding the heating portion.
1. A fluid-heating device for heating fluid with an electrically-powered heater having a helical-shaped heat generating part, the fluid-heating device comprising:
a heating cover portion that is molded so as to cover the surrounding of the electrically-powered heater, the heating cover portion includes an outer wall portion configured to perform heat exchange with the heating fluid, the heater being integrally die-cast molded into the heating cover portion; and
a support body integrally cast into the heating cover portion while supporting the helical-shaped heat generating part, the heating cover portion being integrally die-cast molded using a die in which the heater is supported by the support body,
the support body including a first side and a second side opposite the first side, the first side contacting the helical-shaped heat generating part, and the second side including a pin hole extending into the second side, the second side being configured to perform heat exchange with the heating fluid.
2. The fluid-heating device according to claim 1 , wherein
the heating cover portion and the support body are configured such that the fluid flows around the heating cover portion and the support body.
3. The fluid-heating device according to claim 1 , wherein
the heating cover portion is formed of a metal different from a metal forming an external surface of the heater.
4. The fluid-heating device according to claim 1 , wherein
at least a surface of the support body in contact with the heating cover portion is formed of a metal of a same type as that of the heating cover portion.
5. The fluid-heating device according to claim 1 , wherein
the support body is formed of a metal different from that of the heating cover portion.
6. The fluid-heating device according to claim 1 , comprising:
a heat-conducting member that is integrally cast into the heating cover portion when the heating cover portion is molded; and
a temperature detector provided in the heat-conducting member, the temperature detector being configured to detect temperature of the heater.
7. The fluid-heating device according to claim 6 , wherein
the heat-conducting member is brought into contact with the heater.
8. The fluid-heating device according to claim 6 , wherein
the heat-conducting member has a contact portion that is in surface contact with the temperature detector.
9. The fluid-heating device according to claim 6 , wherein
at least a surface of the heat-conducting member in contact with the heating cover portion is formed of a metal of a same type as that of the heating cover portion.
10. The fluid-heating device according to claim 6 , wherein
the heat-conducting member is formed of a metal different from that of the heating cover portion.
11. The fluid-heating device according to claim 1 , wherein
the support body includes a plurality of support bodies, respectively positioned spaced apart from one another along a longitudinal axis of the fluid-heating device and contact the helical-shaped heat generating part from the first side.
12. The fluid-heating device according to claim 11 , wherein
the outer wall portion having a main body and a plurality of outer circumferential fins projecting outward from the main body.
13. The fluid-heating device according to claim 12 , wherein
the heating cover portion further includes a through hole extending through a circumferential center relative to the helical-shaped heat generating part.
14. A fluid-heating device for heating fluid with an electrically-powered heater, the fluid-heating device comprising:
the electrically-powered heater including a helical-shaped heat generating part;
a heating cover portion configured to surround the heater, the heating cover portion includes an outer wall portion configured to perform heat exchange with the heating fluid; and
a support body configured to support the helical-shaped heat generating part,
wherein the heater and the support body are integrally die-cast molded east into the heating cover portion while the support body supports the helical-shaped heat generating part,
the support body contacting the helical-shaped heat generating part on a first side of the support body, and having a pin hole extending into a second side of the support body opposite to the first side, the second side being configured to perform heat exchange with the heating fluid.
15. The fluid-heating device according to claim 14 , wherein
the support body includes a plurality of support bodies, respectively positioned spaced apart from one another along a longitudinal axis of the fluid-heating device and contact the helical-shaped heat generating part from the first side.
16. The fluid-heating device according to claim 15 , wherein
the outer wall portion having a main body and a plurality of outer circumferential fins projecting outward from the main body.