JP2000005068A - Electric kettle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely set a menu just by operating an operation knob and to automatically set water boiling and heat insulation states adapted to the menu after setting the menu. SOLUTION: This electric kettle is provided with a heat plate 2 provided with a heater 9 on the central upper part of a pedestal main body 3, a freely attachable and detachable container 5 housing liquid, a thermistor member 37 for sensing that the container 5 is mounted on the heat plate 2, the operation knob 11 for freely switchably setting the menu of a set temperature such as the one for cooking milk by a turning operation on the surface of the pedestal main body 3, a main substrate 15 for operating the ON/OFF of the heater 9 and the boiling control of the container 5, etc., inside the pedestal main body 3 and an operation panel substrate 14 provided with a boiling switch 33 or the like for receiving the operation of the operation knob 11 and being conducted to the main substrate 15.

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 in which a pedestal body having a built-in main board or the like provided with a hot plate and an electronic circuit is separated from a liquid storage container.

[0002]

2. Description of the Related Art Conventionally, an electric water heater is provided with a hot plate provided with a heater in the upper center of a base body, a detachable liquid storage container mounted on the hot plate, and a hot plate inside the base body. A thermistor member that indirectly senses the temperature of the liquid in the container is provided from the center of the pedestal, a warming lamp is provided on the front of the pedestal main body, a plurality of menu switches serving also as a boiling switch are provided, a warming lamp is provided inside the pedestal main body, a plurality of menus An operation panel board for operating the switch, a main board with an electronic circuit, a switch board for thermistor members, etc. are provided, the base body is covered with a bottom cover, and a power plug inserted into a plug receptacle provided on the base body Energize more and operate each board,
The heating plate was heated by the heater to boil and keep the liquid in the container.

[0003]

However, in this type of electric water heater, a plurality of menus are switched by pressing each of the menu switches. Therefore, free menu switching by manual operation is performed in a short time. And the operation was complicated. Further, since a plurality of menu switches for which the temperature has been set are all set to be brought into a boiling state and then kept at a predetermined menu temperature, extremely wasteful time and power are required. Furthermore, in assembling the pedestal main body, since the assembly work was very troublesome, such as assembling in the normal state or assembling in the inverted state with each part, the work efficiency was poor, and the parts etc. There were problems such as the occurrence of defective products due to forgetting to assemble.

Accordingly, the present invention has been made to solve the problem of such a conventional electric water heater, and it is possible to freely set a menu only by operating an operation knob, and to automatically set a menu after setting a menu. It is possible to set a water heater and a heat retention state suitable for the menu. In addition, when switching menus, it is possible to switch to the set temperature of the switched menu in a short time. Furthermore, since all the parts are assembled in an inverted state, the assembling work is not troublesome, the work efficiency is good, and all the assembly of the parts can be visually checked, so that there is no need to produce defective products due to forgetting to assemble. To provide a water heater.

[0005]

In order to achieve the above object, an electric water heater 1 according to the present invention comprises a hot plate 2 having a heater 9 at the upper center of a pedestal body 3, and a detachable plate mounted on the hot plate 2. A container 5 for freely storing a liquid, a thermistor member 37 for sensing that the container 5 is placed on the hot plate 2 and indirectly detecting the temperature of the liquid in the container 5, and a thermistor member in the pedestal body 3 A switch board 13 for turning on the power supply in response to the detection of the placement of the container 5 on the 37, and a menu of set temperatures for milk preparation, hot spring egg, roasted tea, rice porridge, etc. by rotating on the surface of the base body 3. An operation knob 11 that can be set so as to be freely switchable, a main board 15 that operates the ON / OFF of the heater 9, an empty heating control, a heat retention control, a boiling control, etc. of the container 5 by an electronic circuit in the pedestal main body 3; Operation knob 1 within Operation plate 23 to conduct the main board 15 receives the operation, heat insulation lamp 30, boiling lamp 3
2. an operation panel substrate 14 having a boiling switch 33;
A bottom cover 4 that covers the inside of the pedestal main body 3 is provided, and water is heated according to each menu, and a heat retaining state is set. Further, with respect to switching between menus by rotating the operation knob 11, only the temperature change from the first menu to the next menu is heated or lowered to maintain the temperature within the temperature range for the next menu. And Further, a hot plate 2 provided with a heater 9 is provided at the center upper portion of the pedestal body 3, and a hot plate cover 10 surrounding the bottom and side walls of the hot plate 2 is provided.
A detachable container 5 for liquid storage is provided on the hot plate 2, a thermistor member 37 having a holder 28 penetrating the hot plate cover 10 and projecting to the center of the hot plate 2 is provided. An operation knob 11 rotatably mounted on the surface is provided, and a switch board 13 for energizing a power supply in response to sensing the placement of the container 5 on the thermistor member 37, and turning on and off the heater 9 by an electronic circuit. Operation provided with a main board 15 for operating empty heating control, heat keeping control, boiling control, and the like, and an operation plate 23, a heat keeping lamp 30, a boiling lamp 32, and a boiling switch 33 which conduct to the main board 15 upon operation of the operation knob 11. A panel substrate 14 is provided, and the pedestal body 3 is provided.
Of the pedestal main body 3 of the electric water heater 1 provided with a bottom lid 4 for covering the inside of the heating plate 2, wherein the inverted hot plate 2 on the assembling frame 29 and the inverted hot plate 2 surrounding the inverted hot plate 2 The inverted hot plate cover 10, the inverted thermistor member 37 in the center of the inverted hot plate cover 10, the inverted pedestal body 3 surrounding the inverted hot plate cover 10, and the inverted In the pedestal main body 3, an inverted switch substrate 13, an inverted main substrate 15, an inverted operation panel substrate 14, and a bottom lid 4 for covering the inverted pedestal main body 3 are provided. Are sequentially assembled in an inverted state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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 longitudinal sectional view of the embodiment of the present invention, FIG. 3 is a perspective view of a beak showing a menu setting state of the operation knob of the embodiment of the present invention, and FIG. Is a perspective view showing an initial assembly state of the embodiment of the present invention,
FIG. 5 is a perspective view showing an assembled state of the embodiment of the present invention. The electric water heater 1 includes a pedestal main body 3 provided with a hot plate 2, a bottom cover 4 for covering the bottom of the pedestal main body 3, a container 5 for detachably storing liquid placed on the upper center of the pedestal main body 3, and the container 5
And a lid 6 that covers the upper mouth of the cover. 35 is a handle.

The container 5 is made of a heat-resistant glass, metal, or ceramic material and has a single-ended cylindrical shape with a wide mouth. The container 5 has a spout extending obliquely downward at the front end of the mouth. In this container 5, a fastening body of a handle 35 is fitted around the lower periphery of the spout.

The pedestal main body 3 is formed of a heat-resistant synthetic resin material, and has a bottomed guide cylinder 8 which is hollow inside, opens at the center of the upper surface, and has a peripheral wall forming this opening hanging downward. The pedestal main body 3 is provided with an internally hollow beak 7 protruding forward at the front. The pedestal body 3 has a hot plate 2 provided with a heater 9 and a hot plate cover 10 provided in a guide tube 8, and an operation panel 12 provided with an operation knob 11 described later on the surface of the beak portion 7. A switch board 13 for operating the heater 9, an operation panel board 14 for operating with the operation knob 11, and a main board 15 having an electronic circuit for operating each operating section are provided inside the lower pedestal main body 3.

The pedestal main body 3 is provided with the heating plate 2 at the rear inside the pedestal main body, the operation panel substrate 14 and the main substrate 15 at the front inside the pedestal main body, and the dividing rib 16 is disposed at the boundary. As shown in FIG. 2, the dividing rib 16 of the pedestal main body 3 overlaps with a bottom lid dividing rib 17 of the bottom lid 4, which will be described later, and the heat on the rear hot plate 2 side in the pedestal main body 3 causes the heat inside the pedestal main body 3. It is shielded so as not to flow out to the front main board 15 side. The pedestal body 3 has an annular groove 18 formed around the guide cylinder 8 for shielding the heat of the hot plate 2, and a bottom hole in the center of the bottom surface of the guide cylinder 8 so that a lower portion of a thermistor member described later can move up and down. Is provided. Reference numeral 19 denotes a boss for mounting each substrate and a bottom cover 4 described later, and reference numeral 20 denotes a terminal hole for hanging two terminals of the heater 9.

The beak 7 of the pedestal body 3 has an operation panel 1 on its surface.
2 are provided. The operation panel 12 of the pedestal body 3 has a beak 7
And a rotatable operation knob 1
1, a hole 21 for lighting a heat retention lamp, a hole 22 for lighting a boiling lamp, an operation plate 23 for a boiling switch, and an operation knob 1
An operation seal 26 is attached to the surface of the operation panel 12 with a through-hole 24 penetrating the lower portion 25 of the operation panel 1. The operation seal 26 shows a menu of set temperatures for milk preparation, hot spring egg, hojicha, porridge, etc., which are changed by turning the operation knob 11 around the through hole 24.

The hot plate 2 provided in the guide tube 8 of the pedestal main body 3 is formed in a disk shape having a central opening by a metal material having good thermal conductivity, particularly, aluminum die-casting or the like. The upper surface of the hot plate 2 is formed in a flat shape so as to make surface contact with the bottom surface of the container 4, and the central opening is formed with a thermistor member 3 described later.
7 has such a small diameter that the upper part of the thermistor cover which can move up and down freely can be inserted. A heater 9 for heating the hot plate 2 is formed in a ring shape on a lower peripheral wall of the hot plate 2 by a sheathed heater, and two terminals of the heater 9 protrude inside the pedestal main body 3 outside the guide cylinder 8. I have.

A hot plate cover 10 is provided between the hot plate 2 and the guide tube 8 of the pedestal body 3 so as to surround the hot plate 2. The hot plate cover 10 is formed in a shallow bottomed cylindrical shape. A central opening communicating with the central opening of the hot plate 2 and the bottom hole of the guide cylinder 8 is provided at the center of the bottom surface. A terminal hole 31 for hanging the terminal is provided. The hot plate cover 10 functions as a shielding tube for preventing the heat of the hot plate 2 from being directed upward and being radiated into the guide tube 8 and the inside of the pedestal body 3 outside the guide tube 8.

The thermistor member 37 indirectly senses the temperature of the liquid in the container 4 and acts on the electronic circuit of the main board 15 to turn on and off the heater 9, and a thermistor cover that covers the thermistor and can move up and down. A mounting member which surrounds the thermistor cover, passes through the center hole of the hot plate cover 10, and is attached to the bottom wall of the hot plate cover 10, and the switch board 13 is passed through the bottom hole of the guide cylinder 8 as the thermistor cover moves up and down. It comprises a holder 28 connected to the switch 27.

The operation panel board 14 is screwed in the beak 7 of the inverted pedestal main body 3 on the back side of the operation panel 12 in an inverted position.
2. Boiling switches 33, operating levers 34 and the like are protruded, and these are wired by a printed circuit. The heat retention lamp 30 is arranged behind the hole 21 for lighting the heat retention lamp of the operation panel 12, the boiling lamp 32 is arranged behind the hole 22 for lighting the boiling lamp of the operation panel 12, and the boiling switch 33 is arranged on the operation panel 12. Placed behind the operating plate 23 for the boiling switch of
The operation lever 34 is arranged to be mounted on the lower portion 25 of the operation knob 11.

The operation lever 34 on the operation panel substrate 14 controls the temperature of the liquid in the container 5 by turning on and off the heater 9 in a menu set by the rotation of the operation knob 11, and is rotatable upward. A simple rotating shaft is provided. The rotating shaft has a cylindrical part cut away, and is arranged such that its tip is located at the center of the through hole 24 of the operation panel 12.

A ring-shaped spacer 36 is fitted into the through hole 24 of the operation panel 12 from the surface of the operation panel 12. The spacer 36 is provided on the outer periphery of the ring portion with a claw that is engaged with the lower surface of the peripheral wall forming the through hole 24 outward at a predetermined interval and is provided with an operation knob 1 on the inner periphery of the ring portion.
Elastic portions for pressing and supporting the lower portion 25 of the first member 1 are provided at predetermined intervals.

The spacer 36 is pressed from the surface of the operation panel 12 toward the through hole 24, and a nail penetrating the through hole 24 is engaged with the lower surface of the peripheral wall forming the through hole 24 and fitted into the through hole 24. The tip of the rotation shaft of the operation lever 34 is disposed at the center of the ring from the inside of the beak 7.

The operation knob 11 is integrally formed with a main body portion located above the ring portion of the spacer 36, and a cylindrical hollow lower portion 25 inserted into the ring portion and fitted to the rotation shaft of the operation lever 34. . The main body of the operation knob 11 is formed in a hat shape with a hollow inside, and a cylindrical hollow lower portion 25 is suspended at the center, and the lower portion 25 is supported by a plurality of support pieces. The lower part 25 of the operation knob 11 is formed such that the inside of the hollow cylindrical shape is formed along the outer peripheral wall of the rotation axis of the operation lever 34.

The main board 15 is screwed into the pedestal main body 3 and has an electronic circuit such as a semiconductor. The current conducted by the plug receiver 39 is supplied to the thermistor member 37 via the operation panel board 14 and the switch board 13. , Switch 2
7, the heater 9, the operation lever 34 and the like. This main board 15 is wired by an electronic circuit to
ON, OFF, means for controlling empty heating when an empty container is set, and when the liquid runs out or runs out during warming, means for controlling warming by menu setting of the operation knob 11, controlling boiling Means and the like are operated.

The switch board 13 is screwed into the pedestal main body 3. A switch 27 is provided on the switch board 13, which is connected to a vertically movable holder 28 of a thermistor member 37, which will be described later, and supplies power. Wired by circuit. The switch board 13 has a shielding plate 38 on its upper surface so as not to directly receive the heat from the hot plate 2 of the base body 3.
I am making.

The bottom lid 6 is placed in an inverted position along the lower outer peripheral wall of the inverted pedestal body 3 so as to cover the inside of the pedestal body 3. A bottom cover dividing rib 17 is provided at a boundary between the panel substrate 14 and the main substrate 15. When the bottom cover dividing ribs 17 are set, they overlap along the rear wall of the dividing ribs 16 of the pedestal body 3, and the rear hot plate 2 side and the front operation panel substrate 14
And the main substrate 15 side.

The operation knob 11 is for milk preparation, for hot spring eggs,
When set in each menu of the set temperature for roasted tea, rice porridge, etc., in the case of milk preparation, after pouring cold water into the container 5, if the boiling switch 33 is pressed, the boiling lamp 32 will be turned on and will be turned off after boiling. I do. At this time, the heat retention lamp 30 blinks until the temperature reaches the set temperature for milk preparation, and lights up when the temperature reaches the set temperature, indicating that the temperature has been set for milk preparation. If the boiling switch 33 is not pressed, the heat retention lamp 30 blinks until the temperature reaches the set temperature for milk preparation, and lights up when the temperature reaches the set temperature.

Next, for a hot spring egg, after pouring cold water into the container 5 and pressing the boiling switch 33, the boiling lamp 32 turns on, and turns off after boiling. At this time, the heat retention lamp 3
0 blinks until the temperature reaches the set temperature for the hot spring egg (about 70 ° C.), lights up when the temperature reaches the set temperature, indicates that the temperature has been set for the hot spring egg. Leave it for 30 minutes to make a hot spring egg. If the boiling switch 33 is not pressed, the heat retention lamp 30 blinks until the temperature reaches the set temperature for the hot spring egg, and when the temperature reaches the set temperature, the lamp is turned on.

In the case of hojicha, after pouring cold water into the container 5 and pressing the boiling switch 33, the boiling lamp 3 is turned on.
2 lights up and goes out after boiling. At this time, the heat retention lamp 30
Flashes until the set temperature for roasted tea (about 95 ° C.) is reached, and lights up when the temperature reaches this set temperature, indicating that the temperature has been set for roasted tea.
If the boiling switch 33 is not pressed, the heat retention lamp 30 blinks until it reaches the set temperature for roasted tea, and lights up when the set temperature is reached. Further, in the case of rice porridge, after pouring cold water and rice into the container 5, if the boiling switch 33 is pressed, the boiling lamp 32 will be turned on, then turned off after boiling, and completed after being left for about 30 minutes. Unless the boiling switch 33 is depressed, the rice swells and a good porridge cannot be made.

In the case of milk preparation, hot spring egg and hojicha, when boiling water is poured into the container 5 or when it is added on the way, the boiling switch 33 is quickly pressed to bring the temperature close to each menu. It is sufficient to determine whether the temperature reaches the set temperature. In this way, the menu can be freely set only by operating the operation knob, and after the menu is set, the water heater and the heat can be automatically adapted to the menu. In addition, when switching menus, it is possible to switch to the set temperature of the switched menu in a short time.

In assembling the pedestal body 3, first, the inverted hot plate 2 is placed on the upper surface of the assembling frame 29, and then the terminal holes 31 of the hot plate cover 10 are placed on the inverted hot plate 2 from above. Then, the two terminals of the heater 9 of the hot plate 2 are projected to cover the hot plate cover 10. Further, the inverted thermistor member 37 is inserted with the thermistor cover movable up and down from the center hole of the inverted hot plate cover 10, and the upper surface of the hot plate 2 inverted from the upper surface of the inverted hot plate cover 10. And the thermal fuse 40 is screwed to the upper surface of the inverted hot plate cover 10.

Next, the guide tube 8 of the pedestal main body 3 which is turned upside down from the upper side of the inverted hot plate cover 10 is put on, and the two terminals of the heater 9 are projected into the terminal holes 20 of the pedestal main body 3 and the bottom hole. Then, the lower part of the thermistor member which moves up and down is inserted and screwed from the upper surface of the guide cylinder 8 of the pedestal main body 3 in the inverted position. Furthermore,
Switch board 13 inverted, main board 1 inverted
5. The inverted operation panel substrate 14 is screwed into a predetermined position, and the plug receiver 39 is inserted into the pedestal main body 3 and each lead wire is wired. Then, the inverted bottom lid 6 is placed inside the pedestal main body 3. If it is screwed so as to cover, assembly is completed.

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, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within the range having the following effects.

[0029]

As is apparent from the above description, the electric water heater according to the present invention has a hot plate provided with a heater at the upper center of the pedestal body, and a detachable liquid container mounted on the hot plate. A thermistor member for sensing that the container is placed on the hot plate and indirectly detecting the liquid temperature in the container, and a power supply that receives the container placement of the thermistor member in the pedestal body. A switch board for turning on and off, and an operation knob that can be set to a set temperature menu such as for milk preparation, hot spring egg, roasted tea, porridge, etc. by rotating on the surface of the pedestal body, and inside the pedestal body A main board that operates ON / OFF of the heater, empty heating control of the container, heat retention control, boiling control, etc. by an electronic circuit, an operation plate that receives the operation of the operation knob in the pedestal main body and conducts to the main board, and a heat insulation lamp. Operation panel board equipped with a lamp, a boiling lamp and a boiling switch, and a bottom cover for covering the inside of the pedestal main body. The configuration is such that water is heated according to each menu and a heat retention state is set, and the operation knob is rotated. When switching between menus by operation, only the temperature change from the first menu to the next menu is heated or lowered to maintain the temperature within the temperature range for the next menu. The inverted hot plate, the inverted hot plate cover surrounding the inverted hot plate, the thermistor member inverted at the center of the inverted hot plate cover, and the inverted hot plate cover An inverted pedestal body surrounding the inverted pedestal body, an inverted switch board inside the inverted pedestal body, an inverted main board, an inverted operation panel board, and a bottom lid covering the inverted pedestal body. And place each part in reverse order. Because Some was assembled comprising a configuration, it is possible to set the hot water kettle, a thermal insulation state adapted to automatically the menu after menu settings it is possible to freely set menu simply by operating the operation knob. In addition, when switching menus, it is possible to switch to the set temperature of the switched menu in a short time. Furthermore, since all the parts are assembled in an inverted state, the assembling work is not troublesome, the work efficiency is good, and all the parts can be visually observed, so that a remarkable effect that no defective products are generated due to forgetting to assemble is expected. I was able to do it.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of the embodiment of the present invention.

FIG. 3 is a perspective view of a beak showing a menu setting state of an operation knob according to the embodiment of the present invention.

FIG. 4 is a perspective view showing an initial assembled state of the embodiment of the present invention.

FIG. 5 is a perspective view showing an assembled state of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electric water heater 2 ... Hot plate 3 ... Base body 4 ... Bottom cover 5 ... Container 6 ... Lid 7 ... Beak part 8 ... Guide cylinder 9 ... Heater 10 ... Hot plate cover 11 ... Operation knob 12 ... Operation panel 13 ... Switch Substrate 14 Operation panel substrate 15 Main substrate 16 Split rib 17 Bottom lid split rib 18 Annular groove 19 Boss 20 Terminal hole 21 Hole for warming lamp lighting 22 Hole for boiling lamp lighting 23 Operation plate for boiling switch 24 ... Through-hole 25 ... Lower part of operation knob 26 ... Operation seal 27 ... Switch 28 ... Holder 29 ... Assembly frame 30 ... Heat insulation lamp 31 ... Terminal hole 32 ... Boiling lamp 33 ... Boiling switch 34 ... Operating lever 35 Handle 36 Spacer 37 Thermistor member 38 Shielding plate 39 Plug receiver 40 Thermal fuse

Continuation of front page (72) Inventor Yoshinobu Arai 2-1-136 Nojinbashi, Chuo-ku, Osaka-shi, Osaka Inside Pip Fujimoto Co., Ltd. (72) Inventor Masaaki Hashime 1-1-23, Higashi Higashi, Tsurumi-ku, Osaka-shi, Osaka No. Orgo F-term (reference) 4B055 AA34 BA12 CA01 CA21 CA66 CA68 CA75 CB03 CB07 CB11 CC01 CC09 CC14 CC16 CC45 CC46 CD32 CD54 CD57 DA02 DB02 GB01 GB03 GB05 GB32 GC04 GC06 GD06

Claims (3)

[Claims] 1. A hot plate (2) having a heater (9) at the upper center of a pedestal body (3); a detachable liquid container (5) mounted on the hot plate (2); The container (5) is sensed when the container (5) is placed on the hot plate (2), and is sensed.
Thermistor member (3) that indirectly detects the liquid temperature inside
7) and the thermistor member (3) in the base body (3).
7) a container (5), a switch board (13) for energizing the power supply in response to the placement, and a rotating operation on the surface of the pedestal body (3) for milk preparation, for hot spring eggs, for hojicha, and porridge. Operation knob (11) that can be set to the set temperature menu for use and the like, and ON / OFF of heater (9), empty heating control of container (5), and heat retention control by electronic circuit in pedestal body (3) , The main board (1
5) and an operation plate (2) that is electrically connected to the main board (15) in response to the operation of the operation knob (11) in the base body (3).
3) an operation panel substrate (14) provided with a warming lamp (30), a boiling lamp (32), and a boiling switch (33);
An electric kettle comprising: a bottom cover (4) for covering the inside of a pedestal body (3); a kettle is set according to each menu; 2. A method for switching between menus by rotating an operation knob (11), heating or lowering only the temperature change from the first menu to the next menu and changing the temperature range to the next menu. 2. An electric water heater according to claim 1, wherein said electric water heater is maintained in said water heater. 3. A hot plate (2) provided with a heater (9) is provided at a central upper portion of the pedestal body (3), and a hot plate cover (10) surrounding the bottom and side walls of the hot plate (2) is provided. A thermistor provided with a detachable liquid storage container (5) mounted on a hot plate (2) and having a holder (28) protruding from the center of the hot plate (2) through the hot plate cover (10). Member (3
7), an operation knob (11) rotatably mounted on the surface of the pedestal body (3) is provided, and a thermistor member (37) is provided.
A switch board (13) for supplying power to the container (5) upon sensing the placement of the container (5), and turning on and off the heater (9), empty heating control, heat retention control, boiling control of the container (5) by an electronic circuit. The operation board (23), the warming lamp (30), the boiling lamp (32), and the boiling switch (33) which are electrically connected to the main board (15) in response to the operation of the main board (15) and the operating knob (11) for operating the same. ), Comprising a base body (3) of an electric water heater (1) provided with an operation panel substrate (14) having a bottom cover (4) covering the inside of the base body (3). The inverted hot plate (2) on the underframe (29), the inverted hot plate cover (10) surrounding the inverted hot plate (2), and the inverted hot plate cover (10) ) Thermistor member (37) inverted at the center of
And an inverted pedestal body (3) surrounding the inverted hot plate cover (10), an inverted switch board (13) in the inverted pedestal body (3), and an inverted main body. Substrate (1
5) An inverted operation panel substrate (14) and a bottom cover (4) for covering the inverted base body (3) are provided, and each part is sequentially assembled in an inverted state. Electric water heater.