JPH1142163A - Electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance heat reserving performance, and save electricity by forming sheathing, which is arranged on an under surface of a lower cover of a cover body to open/close an inner vessel having an upper end wide port and protects the lower cover from heat in the inner vessel, in a downward inclined pan shape, and forming a steam hole where a valve opened only at steam generating time is arranged in its bottom part. SOLUTION: A heater to heat liquid in an inner vessel is arranged on the lower part outside of the bottomed cylindrical inner vessel 2 having an upper end wide port, and a cover body 7 is joined to a shoulder member 4 joined to the upper end of an enclosing body 3 to surround this inner vessel 2 so as to be freely openable/ closable around a hinge 16. The cover body 7 is composed of a lower cover 23 and an upper cover 25, and a steam passage 26 is formed between the lower cover 23 and the upper cover 25, and sheathing 24 to protect the lower cover from heat in the inner vessel 2 is arranged on an under surface of the lower cover 23. In this case, the sheathing 24 is formed in a downward inclined pan shape toward a steam hole opened in this, and a valve element 14 by integrally forming a valve 42 notched in a radial shape from the center and an annular fitting part 43 to surround this valve 42, is arranged in its bottom part, and the valve is opened only at steam generating time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater capable of heating and keeping a liquid and discharging the heated liquid.

[0002]

2. Description of the Related Art Conventionally, an electric water heater is provided with a bottomed cylindrical inner container having a wide-open upper end for accommodating a liquid, and a heater for heating the liquid in the inner container at a lower outer side of the inner container to surround the inner container. Provide an exterior body, join a shoulder member to the upper end of the exterior body,
A bottom plate is connected to the lower end of the outer body, a lower lid covering the upper end wide mouth of the inner container, an upper lid covering the upper surface of the lower lid, and between the lower lid and the upper lid, through the opening of the lower lid to the upper wall of the upper lid. A cover body comprising a steam passage that escapes and a cover plate provided with a steam hole communicating with the steam passage, protecting the lower cover from heat in the inner container with the lower surface of the lower cover, and providing the cover body with a shoulder member A discharge mechanism that is detachably attached to the upper end and that discharges the liquid in the inner container to the outside is provided. The liquid in the inner container heated by the heater is discharged to the outside via the discharge mechanism and the inside of the heated inner container is discharged. The liquid was vaporized and passed through the vapor passage in the lid to the outside.

[0003]

However, in the electric water heater having such a conventional configuration, the heat of the liquid in the inner container heated by the heater causes the heat of the liquid in the inner container to cover the upper end wide opening of the inner container. The heat was radiated from the steam hole to the outside of the electric water heater through the inside of the steam passage. As a result, there is a problem that the heat retention of the liquid in the inner container is poor, the power supply to the heater is increased, and power consumption cannot be saved.

The present invention has been made in order to solve such problems, and only when steam is generated in the inner container, the steam is passed through the steam passage in the lid, and is usually passed through the lid to the outside. An object of the present invention is to provide an electric water heater that can prevent heat to be radiated, has excellent heat retention properties, and can significantly reduce power consumption.

[0005]

SUMMARY OF THE INVENTION An electric water heater according to the present invention comprises a cylindrical inner container 2 having a wide upper end and a bottom for storing liquid.
A heater 5 for heating the liquid in the inner container is provided outside the lower portion of the inner container, an outer package 3 surrounding the inner container is provided, a shoulder member 4 is coupled to an upper end of the outer package, and a lower end of the outer package is provided. Bottom plate 9
And a lower lid 23 that covers the wide-open upper end of the inner container, and a lower lid 2
3 and a steam passage 26 between the lower lid and the upper lid, which passes through the opening of the lower lid to the upper wall of the upper lid.
And protect the lower lid from the heat inside the inner container with the lower surface of the lower lid 23,
And a cover plate 24 having a steam hole 36 communicating with the steam passage 26.
The lid 7 is detachably mounted on the upper end of the shoulder member 4, and a discharge mechanism 8 for discharging the liquid of the inner container to the outside is provided. The inner container heated by the heater 5 is provided. The liquid in the inner container is discharged to the outside via a discharge mechanism, and the heated liquid in the inner container turns into a vapor to form a vapor passage 26 in the lid 7.
, And the cover plate 24 of the lid 7 is provided in the shape of a dish inclined downward toward the steam hole 36, and a valve 42 notched radially from the center is provided. The valve body 14 integrally formed with the surrounding annular fitting portion 43 is provided, and the valve body 14 is stretched on the inner peripheral wall of the steam hole 36 of the cover plate 24, and the valve 42 is always closed, and the inside of the inner container 2 is closed. The valve 42 is opened only when the steam is generated.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of the embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 omitting a part of the internal mechanism, and FIG. 3 is an enlarged longitudinal sectional view showing a lid of the embodiment of the present invention. 4, FIG. 4 is an exploded perspective view showing the lid of the embodiment of the present invention, FIG. 5 is a perspective view showing the valve body of the embodiment of the present invention, FIG. 6 is an enlarged sectional view taken along the line BB of FIG. 5, and FIG. FIG. 8 is a perspective view showing a valve body according to another embodiment.
FIG. 8 is an enlarged sectional view taken along the line CC of FIG. 7. The electric water heater 1 includes an inner container 2 for containing a liquid, an outer body 3 surrounding the inner container,
A shoulder member 4 connected to the upper end of the outer package 3, a heater 5 for heating the liquid in the inner container, a lid 7 attached to the upper end of the outer package so as to be openable and closable, and discharging the liquid in the inner container to the outside. And a bottom plate 9 attached to the lower end of the exterior body. 10 is a handle.

The inner container 2 is formed of a stainless steel material and is formed in a cylindrical shape with a wide end at the upper end and a ring-shaped flange extending outward at the wide end at the upper end. A sealing material is adhered to the lower surface of the flange portion so as not to leak liquid. The center of the bottom wall of the inner container 2 is provided with a convex portion extending inward, and a lower narrow opening for a discharge mechanism to be described later is provided between the lower end side wall of the front inner container and the side wall of the convex portion. Is provided. As shown in FIG. 2, the lower narrow port is connected to an injection pipe 11 communicating with the inner container in a downward direction.

A heater 5 for heating the liquid in the inner container is attached to the outside of the bottom wall of the convex body of the inner container. Reference numeral 12 denotes a thermostat, which is fixed to the center of the bottom wall outside of the convex body to which the heater 5 is attached by a mounting bracket, and turns on and off the heater by sensing the liquid temperature in the inner container. . 1
Reference numeral 3 denotes a plug, which is indirectly or directly connected to the heater 5, the thermostat 12, an electric pump of a discharge mechanism described later, or the like via a lead wire.

The exterior body 3 is made of a synthetic resin material including a body part having a lower end opening surrounding a cylindrical body part of an inner container, and a front cover part which covers a lower end of a beak part of a shoulder member described later in front of an upper end of the body part. Are integrally molded. The body of the exterior body 3 is formed in a cylindrical shape with its front surface inwardly recessed and a lower end opening, and surrounds the inner container 2 with a space between the inner container 2 and the inner container 2. Fifteen
Is a vertically elongated window through which a liquid amount display tube described later can be seen, and a transparent seal is affixed to the surface thereof.

The shoulder member 4 connected to the upper end of the exterior body 3 has an opening communicating with the wide-open upper end of the inner container 2 at the center, a hinge portion 16 for attaching a lid described later at the rear end, and a beak portion at the front. 1
7 is integrally formed of a synthetic resin material. This shoulder member 4
Has an annular step formed around the central opening, and the flange of the inner container 2 is placed on the annular step.

The beak 17 of the shoulder member 4 is hollow inside and formed at the lower surface opening. The beak 17 incorporates a discharge pipe of a discharge mechanism described later, a falling water flowing mechanism, a lamp, and a switch group. A boiling switch button, a water heater lamp, a warming lamp, a discharge button, and the like are provided on the upper wall of the beak 17 in contact with the lamp and the switch group.

The discharge mechanism 8 injects the liquid in the inner container 2 from the injection pipe 11 and the discharge pipe 19 having the discharge port 22 for discharging the liquid to the outside, the pump 18 serving also as a liquid amount display pipe, An electric pump 20 leading to the pumping pipe 18;
A falling water mechanism 21 is provided between the pumping pipe 18 and the discharge pipe 19 and prevents the liquid in the pumping pipe 18 from flowing to the discharge pipe 19 when the pot 1 falls. The discharge mechanism 8 operates the electric pump 20 by pressing the discharge button of the beak 17 of the shoulder member 4 to supply the liquid in the inner container 2 to the injection pipe 11, the electric pump 20, the pumping pipe 18, and the discharge pipe 19. And discharge from the discharge port 22 to the outside.

The bottom plate 9 covers the lower end opening of the exterior body 3 and also serves as a rotation base, so that the exterior body 3 can be rotated. Reference numeral 6 denotes a metal shielding cylinder, which is formed by curling a thin iron plate into a cylindrical shape, coating the inside or the inside and outside thereof to form a reflection surface, and forming a zigzag cross-section uneven pattern. On the front surface of the shielding tube 6, elongated windows are provided vertically so that the pumping pipe 18 can be seen through. The shielding cylinder 6 is disposed between the inner container 2 and the outer casing 3 so that the front surface is the front surface of the pumping pipe 18 of the discharge mechanism.

The shielding cylinder 6 has a heater 5 formed by an inner reflecting surface.
By reflecting the radiant heat from the peripheral side wall of the inner container 2 heated by the above, the temperature of the inner container 2 is prevented from lowering.
Further, by reflecting the radiant heat coming from the outside through the exterior body 3 by the outer reflection surface, the temperature of the inner container 2 can be prevented from lowering. Furthermore, since this shielding cylinder 6 is a cylindrical body having a zigzag cross section in a concavo-convex pattern, the strength of the shielding cylinder 6 is increased, and the surface area becomes larger if the diameter is the same as that of a perfect circular cylinder. In addition, it is easy to store a large amount of air layer inside, and the heat retaining effect is also improved.

The lid 7 is detachably mounted on the upper surface of the shoulder member 4, and as shown in FIG.
3, an upper lid 25 covering the upper surface of the lower lid 23, a steam passage 26 between the lower lid and the upper lid, passing through the opening of the lower lid to the upper wall of the upper lid, and a lower lid formed on the lower surface of the lower lid 23. It is composed of a cover plate 24 provided with a steam hole 36 communicating with the steam passage 26 and protecting the heat from the inside of the vessel. Reference numeral 28 denotes a lock mechanism including a lock claw 29, a lock lever 30, and a spring 31 for attaching the lid 7 to the upper end of the shoulder member 4 so as to be freely opened and closed.

The lower lid 23 has an opening communicating with the inside of the inner container 2 at the center of the lower end, and a falling water valve portion 33 which is located at a rear portion of the lower end inside a steam passage 26 to prevent the liquid from flowing out of the inner container when the water heater falls. It has. The upper lid 25 that covers the lower lid 23 has a lock lever 30 disposed at the front, a hinge 34 connected to the hinge 16 of the shoulder member 4 at the rear, and a vapor vent 35 on the upper surface. The vapor passage 26 between the lower lid and the upper lid extends from a central opening of the lower lid 23 to a reservoir 39 surrounded by an upper wall 37 of the lower lid and a side wall 38 around the lower wall, and a rear side wall 38 of the reservoir 39. Is provided to communicate with a steam drain hole 35 of the upper lid 25 through an upper wall of the inverted flow water valve portion 33.

The cover plate 24 covers the wide end of the upper end of the inner container 2 with a metal material such as stainless steel, and as shown in FIG.
A lower wall 40 that covers the lower surface of the lower lid 23 and an annular side wall 41 that extends upward around the lower wall 40 are integrally formed into a dish shape. The lower wall 40 of the cover plate 24 has a steam hole 36 at the center.
Is provided. The lower wall 40 is inclined downward from the annular side wall 41 toward the steam hole 36. The steam in the inner container 2 passes through the steam hole 36 of the cover plate 24 of the lid 7, passes through the steam passage 26 of the lid 7, enters the falling water valve 33, and is discharged from the steam vent 35 of the upper lid 25. . When the water heater falls, the liquid flows through the vapor outflow path, but the outflow of the liquid is prevented by the falling water valve portion 33. 32 is the cover plate 2
4 is a seal packing stretched around 4.

The valve element 14 fitted in the steam hole 36 of the cover plate 24
As shown in FIG. 5 and FIG. 6, a thin plate-shaped valve 42 cut radially outward from the center is surrounded by a corrosion-resistant and heat-resistant elastic material such as silicone rubber. The annular fitting portion 43 is integrally formed. The annular fitting portion 43 is provided with an annular groove 44 on the outer periphery in which a peripheral wall forming the steam hole 36 of the cover plate 24 is fitted. The cutout of the valve 42 of the valve body 14 is formed in a cross shape from the center, but may be formed in a plurality of radial shapes. This valve element 14 heats the liquid in the inner container 2 and cuts off the valve 4 which has been cut off due to an increase in the pressure in the inner container.
The center of the valve 2 is pushed up, the center of the valve 42 is opened upward, and the generated steam A is guided to the steam passage 26 in the lid 7. When the heating of the liquid is completed and the temperature is kept warm, the pressure rise stops and the valve 42 is not pushed up, so that the radial valve 42 is kept closed to enhance the heat retaining property of the liquid in the inner container. Become.

As shown in FIG. 7 and FIG.
A small hole 45 may be provided in the center of 2, a notch may be provided radially outward from around the small hole 45, and a fitting portion 43 may be provided around the valve. The valve body 14 pushes up the radial valve 42 near the small hole 45 due to the pressure increase in the inner container, and guides the generated steam b from the largely opened small hole 45 to the steam passage 26 in the lid 7. Then, when the heating of the liquid is completed and the liquid enters the heat-retaining state, the water drops are concentrated toward the vapor holes 36 of the cover plate 24 along the inside of the cover plate 24, and the contents are smoothly transferred from the small holes 45 of the valve of the valve body 14. It will fall into the container 2.

The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention. The above-mentioned purpose can be achieved, and the present invention can be carried out with appropriate modification within a range having the following effects.

[0021]

As is clear from the above description, the electric water heater according to the present invention is provided with a cylindrical inner container having a wide-opened upper end for storing a liquid, and a lower inner side of the inner container. Providing a heater that heats the liquid, providing an exterior body surrounding the inner container, coupling a shoulder member to the upper end of the exterior body, coupling a bottom plate to a lower end of the exterior body, and a lower lid that covers a wide upper end of the inner container, An upper lid that covers the upper surface of the lower lid, a steam passage that is located between the lower lid and the upper lid, passes through the opening of the lower lid, and passes through to the upper wall of the upper lid,
A lower cover is provided on the lower surface of the lower cover to protect the lower cover from heat in the inner container, and a cover including a cover plate having a steam hole communicating with the steam passage, and the cover is detachably attached to the upper end of the shoulder member. A discharge mechanism is installed to discharge the liquid in the inner container to the outside, and the liquid in the inner container heated by the heater is discharged to the outside via the discharge mechanism and the liquid in the heated inner container is vaporized. A valve which is provided so as to escape to the outside through the steam passage in the lid body, is provided with a cover plate of the lid body in a dish shape inclined downward toward the steam hole, and is radially cut out from the center;
A valve body integrally formed with an annular fitting portion surrounding the valve is provided, and the valve body is stretched on the inner peripheral wall of the steam hole of the cover plate. The valve is always closed, and when steam is generated in the inner container. Since only the valve is opened, the steam is passed through the steam passage inside the lid only when steam is generated inside the inner container, and always prevents heat radiated to the outside through the lid inside, and has excellent heat retention, The remarkable effect that power saving of power consumption can be greatly improved can be expected.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1 with a part of an internal mechanism omitted.

FIG. 3 is an enlarged longitudinal sectional view showing a lid according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a lid according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a valve body according to the embodiment of the present invention.

FIG. 6 is an enlarged sectional view taken along line BB of FIG. 5;

FIG. 7 is a perspective view showing a valve body according to another embodiment of the present invention.

8 is an enlarged cross-sectional view taken along the line CC of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electric water heater 2 ... Inner container 3 ... Outer body 4 ... Shoulder member 5 ... Heater 6 ... Shielding cylinder 7 ... Lid 8 ... Discharge mechanism 9 ... Bottom plate 10 ... Handle 11 ... Injection pipe 12 ... Thermostat 13 ... Plug 14 ... Valve Body 15: Window 16: Hinge 17: Beak 18: Pumping pipe 19: Discharge pipe 20: Electric pump 21: Overturning water flow mechanism 22: Discharge port 23: Lower lid 24 ... Cover plate 25: Upper lid 26: Steam passage 28 ... Lock mechanism 29 ... Lock claw 30 ... Lock lever 31 ... Spring 32 ... Seal packing 33 ... Tumble water valve part 34 ... Hinge 35 ... Steam vent hole 36 ... Steam hole 37 ... Lower lid upper wall 38 ... Lower lid side wall 39 ... reservoir part of lower lid 40 ... lower wall of cover plate 41 ... annular side wall of cover plate 42 ... valve 43 ... fitting part 44 ... annular groove 45 ... small hole

Claims (1)

[Claims] An inner container (2) having a bottomed cylindrical shape with a wide upper end for containing a liquid, a heater (5) for heating the liquid in the inner container is provided outside a lower part of the inner container, and the inner container is provided. A lower lid (23) for providing a surrounding outer body (3), connecting a shoulder member (4) to an upper end of the outer body, connecting a bottom plate (9) to a lower end of the outer body, and covering an upper end wide opening of the inner container; An upper lid (25) for covering the upper surface of the lower lid (23), a steam passage (26) between the lower lid and the upper lid, passing through an opening of the lower lid to an upper wall of the upper lid, and a lower surface of the lower lid (23) A lid (7) is provided which protects the lower lid from the heat inside the inner container and comprises a cover plate (24) provided with a vapor passage (26) and a vapor hole (36) communicating therewith. 7)
Is detachably attached to the upper end of the shoulder member (4), a discharge mechanism (8) for discharging the liquid in the inner container to the outside is provided, and a discharge mechanism for discharging the liquid in the inner container heated by the heater (5) is provided. An electric water heater (1) which is discharged to the outside and heated by heating the liquid in the inner container through the vapor passage (26) in the lid (7) to the outside as vapor. 7) The cover plate (24) is provided in the shape of a dish inclined downward toward the steam hole (36), and a valve (42) cut radially from the center, and an annular fitting surrounding the valve (42). A valve body (14) integrally formed with the joint (43) is provided, and the valve body (14) is stretched on the inner peripheral wall of the steam hole (36) of the cover plate (24). An electric water heater that is closed and opens a valve (42) only when steam is generated in an inner container (2).