JP2511101Y2 - Liquid heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a heating pot for heating water to obtain hot water, a humidifier for discharging steam to the outside to humidify it, or purified water by cooling steam. The present invention relates to a liquid heating device used for a purified water feeder or the like.

[Prior Art] Conventionally, a liquid heating device has a tank for containing a liquid, for example, water, and a heating device for heating the tank.

The tank has an opening formed in its upper portion. A lid is provided at the top of the tank so as to close the opening.

In such a liquid heating device, when water is heated in the tank, it becomes warm water, and when heating is further performed, steam is generated by boiling. For this reason, the lid is provided with a pressure release device for allowing steam to escape to the outside of the water tank. This pressure release device is a device in which individual parts such as valves and springs are assembled in a housing, and is assembled to a lid. In such a pressure release device, when the vapor pressure in the tank is abnormally increased, it functions as a safety valve that opens the valve to release the vapor inside the tank.

[Problems to be Solved by the Invention] However, a pressure release device separate from the lid must be attached to the lid, which complicates the attachment structure. Therefore, the cost of the pressure release device itself is high, and the cost of the liquid heating device is also high.

Therefore, an object of the present invention is to provide a liquid heating device which can close the opening of the tank with a simple structure and at the same time can release the pressure.

[Means for Solving the Problems] According to the present invention, a tank having an opening formed on one side, a heating device for heating a liquid contained in the tank, and a lid for detachably closing the opening are provided. In a liquid heating apparatus including, the lid has a closing plate having an outer peripheral surface having a diameter smaller than the diameter of the opening, and a packing attached to the outer peripheral surface of the closing plate, and the outer peripheral surface is the The packing faces the inner surface of the tank while entering the inside of the opening of the tank, and the packing has an annular valve portion that closes between the inner surface of the tank and the outer peripheral surface of the closing plate. A liquid heating apparatus is obtained, in which the valve portion is movable in a direction of opening and closing the inside and the outside of the tank according to the pressure of steam generated in the tank.

[Embodiment] FIGS. 1 and 2 show a liquid heating apparatus according to an embodiment of the present invention. The liquid heating apparatus in this embodiment is a distiller that heats unpurified water to generate steam and then cools the steam to obtain purified water.

Referring to FIG. 1, this liquid heating device has a tank 3 having an opening 1 formed on one side, and a heating device 5 for heating a liquid contained in this tank 3. The tank 3 is formed in a tubular shape and has a bottom portion 7 on the other side of the opening 1. The heating device 5 is formed by casting a heat generating element 9 such as a sheath heater inside a substantially flat metal plate 11. The bottom portion 7 of the tank 3 is provided in contact with one surface side of the heating device 5. That is, this tank 3 has an opening at the upper end. The heating device 5 is attached to the lower inside of the exterior body 13. The outer casing 13 has a diameter larger than that of the tank 3. The upper end of the outer casing 13 has a heating device 5
The upper end extends to the same height as the upper end of the tank 3 installed at. The upper end of the tank 3 has an annular engaging portion 15 extending in the radial direction and being bent in a direction facing the outer peripheral surface of the tank 3. The upper end of the exterior body 13 is engaged with the engaging portion 15.

A lid 17 is detachably provided in the opening 1 of the tank 3. The lid 17 closes the opening 1 of the tank 3. Further, the lid 17 has a closing plate 19 having an outer peripheral surface having a diameter smaller than the diameter of the opening 1 of the tank 3, and a packing 21 such as natural rubber or resin attached to the outer peripheral surface of the closing plate 19. are doing. The outer peripheral surface of the closing plate 19 faces the inner surface of the tank 3 while entering the inside of the opening 1 of the tank 3. Packing 21 is tank 3
It has an annular valve portion 23 that closes the space between the inner surface and the outer peripheral surface of the closing plate 19. The valve portion 23 is movable in a direction in which the inside and outside of the tank 3 are opened and closed according to the pressure of steam generated inside the tank 3. Since the packing 21 has elasticity, it is closely attached to the outer peripheral surface of the closing plate 19. Further, the lid 17 has a base member 27 integrally attached to the closing plate 19 on the surface opposite to the tank 3, and a cooling pipe 29 attached to the base member 27. The base member 27 also includes a cooling pipe 29.
A blower 31 for cooling the fan is attached. Blower
Reference numeral 31 is provided inside the cooling pipe 29 formed in a coil shape.

The cooling pipe 29 and the blower 31 are covered with a hood 33 attached to the base member 27. This cooling pipe 29
Has an intake port 35 at one end protruding toward the opening 1 of the tank 3 and an intake port 37 at the other end protruding outside the lid.

Therefore, in the cooling pipe 29, the unpurified water contained in the tank 3 is heated by the heating device 5, and the steam thus obtained is introduced from the inlet 35. Then, the steam inside the cooling pipe 29 is cooled by the blower 31, purified water is produced and extracted from the outlet 37. Therefore, the extracted purified water is stored in the recovery container 39.

In such a liquid heating apparatus, the steam inside the tank 3 is guided to the cooling pipe 29. However, when steam is generated with a part of the cooling pipe 29 being closed, There is a danger because the vapor pressure inside becomes abnormally high.
For this reason, the valve portion 23 that normally closes between the tank 3 and the closing plate 19 is opened according to the vapor pressure of the valve portion 23 to form a steam escape path between the inside and outside of the tank 3 and Reduce the vapor pressure. The valve portion 23 returns to its original shape when the vapor pressure becomes low, and the tank 3 and the closing plate are closed.
Block between 19 and.

[Advantages of the Invention] As described in the above embodiments, according to the liquid heating apparatus of the present invention, the packing may be attached to the lid, and the opening of the tank can be easily closed.

Moreover, since the opening of the tank can be closed and the inside and outside of the tank can be opened and closed according to the pressure of the steam by the movement of the valve portion, it is possible to provide an inexpensive pressure release device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a liquid heating apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the liquid heating apparatus of FIG. 1; Opening, 3; Tank, 5; Heating device, 13; Exterior body, 15; Engagement part, 17; Lid body, 19; Closing plate, 21; Packing, 23; Valve part, 27; Base member, 29; Cooling pipe, 31; blower, 33; hood.

Claims (1)

(57) [Scope of utility model registration request] 1. A liquid heating apparatus comprising a tank having an opening formed on one side thereof, a heating device for heating a liquid contained in the tank, and a lid body for detachably closing the opening, wherein the lid body is A closing plate having an outer peripheral surface having a diameter smaller than that of the opening, and a packing attached to the outer peripheral surface of the closing plate, the outer peripheral surface entering inside the opening of the tank. The packing is opposed to the inner surface of the tank in a state, and the packing has an annular valve portion that closes between the inner surface of the tank and the outer peripheral surface of the closing plate, and the valve portion is the tank. A liquid heating device, wherein the liquid heating device is movable in such a direction as to open and close between the inside and outside of the tank according to the pressure of steam generated inside.