JP2000079059A - Electric water boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid malfunction of a pushbutton switch, and lock the pushbutton switch by operating a lock knob by a handle. SOLUTION: A main body 1 of this electric water boiler comprises a cover body 2, an inner container provided inside, and a heating means, temperature detection means, a control board, etc., disposed under that. In this case, it comprises a pushbutton switch 33 provided on the outer side of a foreward end part position of a handle 9 at an upper part of the main body 1 when it is rotated forward to start energization to the heating means, and a lock knob 34 provided on the front side of the position of the forward end part when the handle 9 at the upper part of the main body 1 is rotated forward to lock the pushtbutton switch 33.

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, and more particularly, to an electric water heater having a heating means, a temperature detecting means, a control board, an operation section and the like.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view of a conventional electric water heater, and FIG. 8 is a longitudinal sectional view thereof. In the figure, reference numeral 1 denotes a main body of an electric water heater, 5 denotes a body ring having a projecting portion 5a projecting forward, and a nose cover 6 disposed below the projecting portion 5a, which is provided integrally with the main body 1. . 2 is a lid which covers the upper opening of the main body 1 and has a built-in air pump 3.
The lid 2 is turned up and down by the opening / closing mechanism 7 provided at the front and the hinge mechanism 8 provided at a portion connecting the body ring 5 and the lid 2 so that the upper part of the main body 1 is opened. It is configured. The body ring 5 is provided with a handle 9 which can be rotated in the front-rear direction and is used when carrying the electric kettle. Hereinafter, both the main body 1 and the lid 2 are referred to as a main body.

An operation unit 10 is provided on an overhanging portion 5a of the body ring 5, and its upper portion is covered with an operation name plate 11, and a push button 12 for re-boiling and a push button 1 are provided.
A lock knob 13 for locking the push button 12 to prevent a malfunction of the push button 12, a lamp for displaying a heating state of water or hot water in an inner container, which will be described later, and a lamp display unit 14 for displaying a turned on or off state of the lamp. Are provided, and when the push button 12 is operated, heating of the water in the inner container by a heater described later is started. As shown in FIG. 9, the push button 12 is provided with a leaf spring 12a and a switch portion 12b at a lower portion thereof, and the leaf spring 12a covers a part of the switch portion 12b.

[0004] Reference numeral 15 denotes an inner container provided in the main body 1.
A heater 17 held by a heater holder 16 and fixed by welding at the lower side of the bottom surface thereof, and an inner container 15 held by a sensor holder 18 and fixed by welding at a lower central portion of the bottom surface.
A temperature sensor 19 such as a thermistor for detecting the temperature of water in the inside is provided. A guide hole 15 a provided on the bottom surface of the inner container 15 is provided with a nose cover of the body ring 5 through a water guide pipe 20 and a discharge valve 21. Nozzle 22 provided in 6
Is communicated to. In addition, a water level indicator 20a is provided on the back surface of the water guide pipe 20 so that the amount of water or hot water in the inner container 15 can be distinguished by seeing through the cutout of the water level display window 1a provided on the side surface of the main body 1. It has become. Reference numeral 23 denotes a control unit provided at a lower portion in the main body 1. The control unit 23 includes a control board 24 and a board cover 25 having a substantially convex cross-section, which is open at the bottom and covers the upper surface and the outer periphery of the control board 24. Is electrically controlled to boil the water in the inner container 15 to a constant temperature and keep the temperature.

When the lid 2 is lifted upward by operating the opening / closing mechanism 7, the electric water heater having the above-described configuration is operated.
Is rotated about the hinge pin of the hinge mechanism 8 as a fulcrum, and
The upper part of is opened. Then, after filling the inner container 15 of the main body 1 with water, the lid 2 is rotated in the opposite direction to cover the inner container,
An operation unit 10 provided on the overhang portion 5a of the body ring 5
After operating the lock knob 13 to release the lock of the push button 12, pressing the push button 12 of the operation unit 10
The control unit 23 starts energization of the heater 17 and
Generates heat and heats the water in the inner container 15. At this time, a lamp indicating that the operation unit 10 is reboiling is turned on and displayed on the lamp display unit 14. When the temperature detected by the temperature sensor 19 reaches the boiling temperature, the controller 23
The energization of the inner container 15 is stopped to keep the hot water in the inner container 15 warm. At this time, the lamp indicating reboil is turned off and the lamp display unit 1
In 4, lighting of a lamp indicating that heat is being held is displayed.

Next, when the hot water in the inner container 15 is used to put tea or the like, the air pump 3 is compressed by pushing down a push plate provided on the lid 2, and the compressed air is released from the inner pump. 15, pressurizes the surface of the hot water in the inner container 15, and the hot water is pushed out of the nozzle 22 through the guide hole 15 a and the water pipe 20,
Hot water is supplied into the teapot containing tea leaves. Then, the reduced amount of hot water in the inner container 15 is discerned from the water level display window 1a. When water is added to the inner container 15 and the push button 12 is pressed, the water in the inner container 15 is heated again and boiled. Can be

[0007]

In the conventional electric water heater as described above, a lock knob 1 provided with a push button 12 for reboil in its operating section 10 is provided in the vicinity thereof.
3 is operated so as to be locked. However, before the push button 12 is locked by the lock knob 13, for example, a part of the handle 9 turned to the operation unit 10 side, that is, the front end portion is hit, and the push button 12 is sometimes pressed and erroneously operated. . Further, when no water is contained in the inner container 15, there is a problem that the inner container 15 is ignited and the inner container 15 and the like are damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to avoid a malfunction of a push button switch by a handle and to lock a push button switch by operating a lock knob with the handle. An object of the present invention is to provide an electric water heater that can be used.

[0009]

SUMMARY OF THE INVENTION An electric water heater according to the present invention has a lid for covering an upper opening, an inner container therein, and a heater for heating water in the inner container below the inner container. Means, a main body provided with a temperature detection means for detecting the temperature of water, a control board for electrically controlling the heating means, and the like, a push button switch provided on an upper part of the main body, for starting energization of the heating means, and A lock knob for locking the push button switch, wherein the push button switch is provided outside the position of the front end when the handle provided on the main body and rotatable in the front-rear direction is rotated forward. The lock knob is provided on the front side of the position of the front end when the handle is turned forward.

[0010]

When the handle provided on the main body is rotated forward, the front end of the handle hits a lock knob provided on the upper part of the main body, and the rotation is stopped. At this time, the push button switch provided on the upper part of the main body and provided outside the position of the front end of the handle prevents erroneous operation by the handle. Further, the lock knob is slid in a forward direction where the push button switch is locked by the front end portion of the turned handle, and even if the push button switch is operated by mistake, the push button switch is locked and the heating means is turned on. To prevent electricity from flowing through.

[0011]

1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. The same parts as those of the conventional example described with reference to FIGS. In the figure, reference numeral 31 denotes a lamp display unit provided on the operation name plate 11 covering the upper part of the operation unit 10 and displaying a lighting or extinguishing state of the lamp indicating reboiling or the like. As shown in FIG. Embossed in a convex shape corresponding to the shape,
The surface of the convex portion is formed in an uneven shape so that the light source of the lamp 32 is irregularly reflected, and is subjected to light diffusion processing.

Reference numeral 33 denotes a push button for reboil provided on the operation unit 10. As shown in FIG. 4, a leaf spring 33a for urging the push button 33 upward and a switch unit 33b are disposed below the push button. The leaf spring 33a covers the upper part of the switch part 33b, so that water or dust entering from a gap between the lid 2 and the operation name plate 11 or the like directly adheres to the switch part 33b, and no electrical failure occurs. Is protected. 34
Is a lock knob for locking the push button 33 to prevent the push button 33 from malfunctioning. An arrow X shown in FIG.
When the lock knob 34 is slid in the direction of
3 is locked by the plate member 34a of the lock knob 34 so that the pressing operation cannot be performed, and the switch 33b is turned on.
However, the lock knob 34 in the direction of the arrow Y shown in FIG.
Is slid, the lock of the plate member 34 of the lock knob 34 is released, the push button 33 is opened, and the switch 33
b is turned ON.

The push button 33 and the lock knob 34 are located away from the center of the main body 1 and
As shown in FIG. 2, it can be rotated in the front-rear direction (rotation locus D)
A push button 33 is provided outside the front end 9 a of the handle 9, and a lock knob 34 is provided at the center of the main body 1 of the push button 33 and forward of the position of the front end 9 a of the handle 9. It is provided so that both 33 and 34 are located in front and back. The lock knob 34 also serves as a stopper for the handle 9 turned forward, and is slid in the front direction, that is, in the direction of arrow X shown in FIG. The button 33 is locked and the switch 33b
Is not turned on.

Reference numeral 35 denotes a protrusion having a slightly smaller outer shape than the inner shape of the board cover 25 formed integrally with the bottom plate 1b of the main body 1, covering the inner peripheral side surface of the board cover 25 so as to sandwich the control board 24. The cover 25 and the protrusion 35 prevent water or the like that has entered from below the main body 1 from adhering to the control board 24. 36 is a putty filled between the temperature sensor 19 and the sensor holder 18 and the lower center of the bottom surface of the inner container 15 as shown in FIG. 6, and is made of a heat-resistant material such as silicon, for example. The temperature of the water in the inner container 15 is accurately detected by being in close contact with the bottom surface of the inner container 15.

In this embodiment constructed as above, first, the lid 2 is lifted upward by operating the opening / closing mechanism 7 provided on the lid 2, and the hinge 2 is rotated about the hinge pin of the hinge mechanism 8 as a fulcrum. The upper part of the main body 1 is opened. Then, the inner container 15 of the main body 1 is filled with water, and the lid 2 is turned in the opposite direction to cover the inner container. Then, the lock knob 3 of the operation unit 10
When the push button 33 is pressed after the lock of the push button 33 is operated by operating the button 4, the control unit 23 starts energization of the heater 17, and the heater 17 generates heat to heat the water in the inner container 15. . At the same time, the lamp 3 indicating that the operation unit 10 is reboiling.
2 lights up and is displayed on the lamp display unit 31. At this time,
The light source of the lamp 32 can be confirmed in a wide range by the lamp display unit 31 formed in a convex shape and subjected to light diffusion processing. Further, during the heating, the temperature of the water in the inner container 15 is always accurately detected by the temperature sensor 19 which is in close contact with the bottom surface of the inner container 15 by the putty 36 and prevents invasion of steam or the like.

Next, when the temperature of the hot water in the inner container 15 detected by the temperature sensor 19 reaches the boiling temperature, the controller 23
Stops the energization of the heater 17 to keep the hot water in the inner container 15 warm, the lamp 32 indicating that the operation section 10 is reboiled is turned off, and the lighting of the lamp 32 indicating that the heat is being maintained is displayed on the lamp display section 31. Is done.

Then, for example, tea is put into the inner container 15.
When the hot water inside is used, the amount of hot water decreases and the water level display window 1
When water is added to the inner container 15 and the push button 33 is pressed, the water in the inner container 15 is heated again and boiled. And hot water is always prepared.
Further, even if water is applied to the electric water heater during water supply and water or the like enters the operation unit 10 and the control unit 23, the leaf spring 3
The electronic components of the operation unit 10 and the control unit 23 are protected by the 3a, the board cover 25, and the protrusion 35.

When, for example, the handle 9 is turned forward after carrying the electric water heater, the handle 9 is attached to the main body 1 of the lock knob 34 as shown in FIG. And stops in that state. At this time, the front end portion 9a of the handle 9 slides the lock knob 34 forward, the push button 33 is locked by the plate member 34a of the lock knob 34, and the switch 33b is not turned on.
The inner container 15 is prevented from being damaged due to, for example, empty heating.

In the above-described embodiment, the air pump 3 built in the lid 2 is pressurized to send compressed air to the inner container 15.
The case where the present invention is embodied in an electric water heater provided with an air-type hot water supply means for supplying hot water thereby is shown. However, the present invention is not limited to this. For example, a power supply is closed by a switch to drive a built-in motor. Thus, the present invention can also be implemented in an electric water heater having an electric hot water supply means for supplying hot water.

[0020]

As described above, the electric water heater according to the present invention has the lid covering the upper opening, the inner container, and the lower part of the inner container for heating the water in the inner container. means,
A main body provided with a temperature detecting means for detecting the temperature of water, a control board for electrically controlling the heating means, and the like; a push button switch and a push button provided on an upper part of the main body for starting energization of the heating means A lock knob for locking the switch, and the push button switch is provided outside the position of the front end portion when the handle provided on the main body and rotatable in the front-rear direction is rotated forward,
Since the lock knob is provided in front of the position of the front end when the handle is turned forward, erroneous operation of the push button switch by the handle turned forward can be avoided, and the lock knob can be locked by pushing the lock knob. When the push button switch is pressed by mistake, the push button switch can be locked to prevent the heating means from being energized.
As a result, an electric water heater that can prevent the inner container from being damaged due to empty heating can be obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a plan view of an operation unit according to the present invention, and FIG.
It is A sectional drawing.

FIG. 4 is a plan view of an operation unit according to the present invention and FIG.
It is B sectional drawing.

FIG. 5 is an operation explanatory view showing a cross section of the operation section according to the present invention.

FIG. 6 is an enlarged view of a temperature sensor part of FIG. 2;

FIG. 7 is an external perspective view of a conventional electric water heater.

8 is a longitudinal sectional view of FIG.

FIG. 9 is a plan view of an operation unit of a conventional electric water heater.

FIG. 10 is an enlarged view of a temperature sensor part of FIG. 8 and an exploded view of the temperature sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body part 2 Lid 9 Handle 9a Front end part 10 Operation part 15 Inner container 17 Heater 19 Temperature sensor 24 Control board 33 Push button 33b Switch part 34 Lock knob

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Kikuchi 1728-1, Koeda, Oaza-gun, Hanazono-cho, Osato-gun, Saitama Prefecture Inside Mitsubishi Electric Home Equipment Co., Ltd. Mitsubishi Electric Home Equipment Co., Ltd.

Claims (1)

[Claims] A heating means for heating a water in the inner container, a temperature detecting means for detecting a temperature of the water, and a heating means for heating the water in the inner container. A main body provided with a control board and the like for electrically controlling the heating means, a push button switch provided on the upper part of the main body and for starting energization of the heating means, and a lock knob for locking the push button switch The push button switch is provided outside the position of the front end when the handle provided on the main body and rotatable in the front-rear direction is rotated forward, and the lock knob is provided. An electric water heater provided in front of a position of a front end portion when the handle is rotated forward.