Induction heating module and water purifier having the same

1. A water purifier, comprising:

a case comprising a base that defines a bottom of the water purifier;

a filter portion installed at an inside of the case; and

an induction heating module configured to heat purified water having passed through the filter portion,

wherein the induction heating module includes:

a bracket mounted inside the case and disposed perpendicular to the base,

a hot water tank coupled to one side of the bracket,

a water inlet pipe disposed at a lower part of the hot water tank,

a water outlet pipe disposed at an upper part of the hot water tank,

a working coil that is disposed at one side of the hot water tank and that faces the hot water tank, the working coil comprising a conducting wire wound in an annular shape and being configured to generate magnetic field lines for induction heating of the hot water tank, and

a spacer that is located between the working coil and the hot water tank, wherein the hot water tank includes:

a first cover that faces the working coil and that has a flat shape,

a second cover that is coupled to the first cover to thereby define an inner space for water flow in the hot water tank, the second cover having an edge coupled to an edge of the first cover and configured to maintain airtight sealing of the inner space of the hot water tank,

a longitudinal protrusion portion that extends along a longitudinal direction corresponding to a top-down direction of the water flow in the inner space of the hot water tank, and

a horizontal protrusion portion that extends along a horizontal direction crossing the longitudinal direction, and

wherein an extension length of the longitudinal protrusion portion in the longitudinal direction is greater than an extension length of the horizontal protrusion portion in the horizontal direction.

2. The water purifier of claim 1 , wherein the spacer is configured to maintain a constant thickness based on being pressed inward by a coupling force between the hot water tank and the bracket.

3. The water purifier of claim 1 , wherein the spacer is made from mica.

4. The water purifier of claim 1 , wherein the spacer is made from glass.

5. The water purifier of claim 1 , wherein the spacer is made from silicon.

6. The water purifier of claim 1 , the spacer comprises a plurality of spacers that are adhered to each other.

7. The water purifier of claim 1 , wherein a first surface of the spacer is adhered to the hot water tank, a second surface of the spacer opposite the first surface is adhered to the working coil, and a thickness of the spacer determines a gap between the hot water tank and the working coil.

8. The water purifier of claim 1 , wherein:

the spacer has a shape that extends to inner and outer sides of the working coil; and

the spacer includes:

a first portion that radially extends to at least one of the inner side or the outer side of the working coil, and

a second portion that is narrower than the first portion in a radial direction.

9. The water purifier of claim 1 , wherein the hot water tank and the working coil are exposed to each other through a hole that is defined in a surface of the spacer.

10. The water purifier of claim 1 , wherein:

the bracket includes a plurality of boss portions that are spaced apart from each other and that are arranged to correspond to an edge of the hot water tank, each of the plurality of boss portions being configured to receive a screw;

the hot water tank and the bracket are coupled to each other by the screws inserted through the plurality of boss portions; and

the edge of the hot water tank is located between a head of each of the screws and each of the plurality of boss portions.

11. The water purifier of claim 1 , wherein the bracket comprises:

a base portion that faces toward the working coil; and

a plurality of hot water tank support portions that are spaced apart from each other, that protrude from the base portion, and that are configured to support the hot water tank.

12. The water purifier of claim 1 , further comprising an insulator that is located between the working coil and the bracket and that is configured to restrict heat conduction between the insulator and the working coil.

13. The water purifier of claim 12 , wherein the insulator is made from mica.

14. The water purifier of claim 12 , wherein the insulator is made from glass.

15. The water purifier of claim 12 , wherein the insulator is made from silicon.

16. The water purifier of claim 12 , wherein the insulator defines a hole in a surface of the insulator.

17. The water purifier of claim 12 , wherein each of the spacer and the insulator has a shape that extends to inner and outer sides of the working coil, the insulator including:

a first portion that radially extends to at least one of the inner side or the outer side of the working coil, and a second portion that is narrower than the first portion in a radial direction.

18. The water purifier of claim 17 , wherein the bracket includes a position fixing portion that protrudes toward the working coil along an inner circumference of the working coil and that is configured to guide the working coil, the spacer, and the insulator to a fixed position.

19. The water purifier of claim 17 , wherein the water purifier comprises:

a temperature sensor that is located at the inner side of the working coil and that is configured to measure a temperature; and

a fuse that is located at the inner side of the working coil and that is configured to operate based on the temperature being above a preset temperature, and

wherein the induction is controlled based on the temperature measured by the temperature sensor.

20. The water purifier of claim 1 , wherein the extension length of the horizontal protrusion portion in the horizontal direction is greater than a width of the longitudinal protrusion portion in the horizontal direction.