JPH0759659A - Electric water heater - Google Patents

Abstract

PURPOSE:To provide an electric water heater which makes the display of a lamp in a control part clear, and which can prevent occurrence of erroneous operation caused by entrance of water or the like, with a high degree of accuracy and reliability. CONSTITUTION:A lamp display part 31 on a control part 10 is formed in a convex shape corresponding to the shape of the apex part of a lamp, and the convex shape part is subjected to a light dissipating process, in an electric water heater comprising an inner container, and a body 1 provided in the lower part of the inner container and incorporating heating means, temperature detecting means, a control panel and the like, and a lid 2 incorporating the control part 10 having a push button switch 33, the lamp display part 31 and the like, for covering the top opening of the body 1.

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 provided with a heating means, a temperature detecting means, a control board, an operating 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 vertical sectional view thereof. In the figure, reference numeral 1 is a main body of an electric water heater, and 5 is a body ring having a protruding portion 5a protruding forward, and a nose cover 6 arranged below the body ring, which is provided integrally with the main body 1. Reference numeral 2 denotes a lid body that covers the upper opening of the main body 1 and has an air pump 3 built therein. The lid mechanism 2 is provided at an opening and closing mechanism 7 and a hinge mechanism 8 provided at a portion connecting the body ring 5 and the lid body 2. Lid 2
Is configured to rotate in the vertical direction to open the upper portion of the main body 1. Further, the body ring 5 is provided with a handle 9 which is rotatable in the front-rear direction and used when carrying an electric water heater.

Reference numeral 10 denotes an operating portion provided on the projecting portion 5a of the body ring 5, the upper portion of which is covered with an operation name plate 11, and a push button 12 for reboiling and a push button 1 are provided.
2, a lock knob 13 for preventing a malfunction, 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 portion 14 for displaying a lighting or extinguishing state of the lamp are provided. When the push button 12 is operated, heating of water in the inner container by a heater described later is started. Further, as shown in FIG. 9, the push button 12 is provided with a leaf spring 12a and a switch portion 12b at its lower portion, and the leaf spring 12a covers a part of the switch portion 12b.

Reference numeral 15 denotes an inner container provided in the main body 1, which has a heater 17 held by a heater holder 16 below the bottom surface thereof and fixed by welding, and a sensor holder 18 at the lower center of the bottom surface thereof. A temperature sensor 19 such as a thermistor for detecting the temperature of the water in the inner container 15 which is held and fixed by welding is installed, and the guide hole 15a provided in the bottom surface of the inner container 15 has a water guide pipe 20 and a discharge valve. The nozzle 22 is connected to the nozzle 22 provided on the nose cover 6 of the body ring 5 via 21. Further, a water level indicator 20a is provided on the back surface of the water guiding pipe 20, so that the amount of water or hot water in the inner container 15 can be seen through the cutout portion of the water level display window 1a provided on the side surface of the main body 1. Has become. 23 is the main body 1
A controller provided at the lower part of the inside includes a control board 24 and a board cover 25 having a substantially convex cross-section that is open at the bottom and covers the upper surface and the outer periphery of the control board 24.
And the like are electrically controlled to boil the water in the inner container 15 to a constant temperature and keep it warm.

In the electric water heater having the above-mentioned structure, when the lid 2 is lifted up by operating the opening / closing mechanism 7,
Rotates about a hinge pin of the hinge mechanism 8 as a fulcrum to open the upper portion of the main body 1. Then, after filling the inner container 15 of the main body 1 with water, the lid body 2 is rotated in the opposite direction to cover it, and the push button 12 of the operation portion 10 provided on the projecting portion 5 a of the body ring 5 is pushed. Then, the control unit 23 starts energizing the heater 17, and the heater 17 generates heat to heat the water in the inner container 15. At this time, a lamp indicating that the operation unit 10 is being reboiled 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 stops energizing the heater 17 to keep the hot water in the inner container 15 warm. At this time, the lamp indicating the reboil is turned off, and the lamp display unit 14 displays that the lamp is being kept warm.

Next, when the hot water in the inner container 15 is used to store tea, for example, when the push plate provided on the lid 2 is pushed down to compress the air pump 3, the compressed air from the air pump 3 is transferred to the inner container. 15 is pressure-fed to the upper space in 15 to pressurize the surface of the hot water in the inner container 15, and the hot water is extruded from the nozzle 22 through the guide hole 15a and the guide pipe 20 and the like,
Hot water is supplied to the teapot containing the tea leaves. Then, the reduced amount of hot water in the inner container 15 can be discerned from the water level display window 1a. When the 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. To be

[0007]

In the conventional electric water heater as described above, the lamp display section of the operation section 10 indicates whether the water in the inner container 15 of the main body 1 is being reboiled or kept warm. It can be determined by observing the lighting state of the lamp by 14. However, since the operation name plate 11 provided with the lamp display portion 14 is configured to be substantially flat to cover the upper portion of the operation portion 10, the lamp display portion 14 is provided.
On the other hand, when the lighting state of the lamp is viewed from an oblique direction, the light source of the lamp is hard to see, and it is unclear, and there is a risk that it may cause an erroneous view and cause an erroneous operation.

The push button 12 for reboiling provided on the operating portion 10 is structured so that its operation is locked by a lock knob 13 provided in the vicinity thereof, but it is locked by the lock knob 13. For example, when the handle 9 is turned forward, that is, when the handle 9 is turned to the side of the operation unit 10, a part of the handle 9 may push the push button 12, and when the inner container 15 does not contain water, it is cooked empty. There has been a problem that the inner container 15 and the like are damaged and the inner container 15 is damaged.

Further, when water is put in the inner container 15,
For example, since an electric water heater was placed on the sink to supply water, water spilled on the sink or water from the faucet splashed onto the electric water heater, and the operation name plate of the lower part of the main body 1 and the operation unit 10 Water enters through the gap between 11 and the lid 2,
Electrical parts and switch section 12b in the control board 24
Adversely affecting electronic components in the operation unit 10, such as
The electric water heater may malfunction due to an electric system failure.

Further, the temperature sensor 19 for detecting the temperature of the water in the inner container 15 is provided with the sensor holder 18 in the inner container 15.
It is fixed to the lower center of the bottom surface of the by welding, but as shown in FIG. 10, since the temperature sensor 19 is composed of a heat sensitive element 19a and an insulating tube 19b covering it,
The welding surface of the temperature sensor 19 welded to the bottom surface of the inner container 15 has an arc shape and is not in close contact with the bottom surface of the inner container 15, so that steam or the like enters the gap C and the temperature sensor 19 causes insulation failure.
The temperature of the water in the inner container 15 could not be detected accurately.

The present invention has been made in order to solve the above-mentioned problems, and it is highly safe and reliable that the lamp display of the operation portion is clarified and malfunction due to entry of water or the like can be prevented. The purpose is to provide an electric water heater.

[0012]

An electric water heater according to the present invention is provided with an inner container, a main body in which a heating means, a temperature detecting means, a control board and the like are arranged below the main body, and an upper opening of the main body. In an electric water heater comprising a lid body that covers a portion and has an operation portion having a push button switch and a lamp display portion, etc., the lamp display portion of the operation portion is formed in a convex shape corresponding to the top shape of the lamp. The light-diffusing process is applied to the convex portion.

Further, the push button switch of the operation section is composed of a switch section electrically connected to the heating means, a button section for operating the switch section, and a leaf spring for urging the button section upward. The upper part of the switch is covered with a leaf spring.

Further, a push button switch is provided at a position away from the central portion of the main body of the operation portion, and a lock knob for locking the push button switch is provided on the central portion side of the push button switch.

The upper surface and the outer periphery of the control board are covered by a board cover having a substantially convex cross-section whose lower side is open, and the control board is formed by a protrusion having an outer shape slightly smaller than the inner shape of the board cover provided on the bottom plate of the main body. It covers the inner peripheral side surface of the substrate cover so as to sandwich it.

Further, a putty made of a heat-resistant material is filled between the temperature detecting means and the holder for holding the temperature detecting means and the bottom surface of the inner container.

[0017]

When the push button switch of the operation unit is operated to start heating the water in the inner container of the main body, the lamp indicating the heating state of the inner container of the operation unit is turned on and displayed on the lamp display unit. At this time, the light source of the lamp can be confirmed in a wide range by the lamp display section which is formed in a convex shape and subjected to the light diffusion treatment,
Prevent erroneous operation due to unclear lamp.

Further, the push button switch of the operating portion is composed of a switch portion electrically connected to the heating means, a button portion for operating the switch portion, and a leaf spring for urging the button portion upward. By covering the upper portion of the switch portion with the leaf spring, the leaf spring protects the switch portion from water and the like that has entered the operating portion, and prevents malfunction of the electric water heater due to failure of the electric system.

Further, a push button switch is provided at a position away from the center of the main body of the operation section, and a lock knob for locking the push button switch is provided on the center side of the push button switch, whereby a handle of an electric water heater, etc. Operation of the push button switch is prevented.

Further, the upper surface and the outer periphery of the control board are covered with a board cover having a substantially convex cross-section whose lower side is opened, and the control board is provided with a projecting portion having an outer shape slightly smaller than the inner shape of the board cover provided on the bottom plate of the main body. By covering the inner peripheral side surface of the substrate cover so as to sandwich it, the substrate cover and the protrusion protect the control substrate from water and the like that has entered from the bottom of the main body, and prevent malfunction of the electric water heater.

Further, by putting a putty made of a heat-resistant material between the temperature detecting means and the holder for holding the temperature detecting means and the bottom surface of the inner container, the temperature detecting means is surely attached to the bottom surface of the inner container. Make them adhere closely.

[0022]

1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a vertical sectional view thereof. Note that the same parts as those of the conventional example described with reference to FIGS. In the figure, reference numeral 31 is a lamp display portion which is provided on an operation name plate 11 which covers the upper portion of the operation portion 10 and which indicates a lighting or extinguishing state of a lamp which indicates, for example, during reboiling, and as shown in FIG. Embossed in a convex shape to match the shape,
The surface of the convex portion is formed in a concavo-convex shape so as to diffusely reflect the light source of the lamp 32, and is subjected to light diffusion processing. 33
Is a push button for re-boiling provided on the operation portion 10. As shown in FIG. 4, a leaf spring 33a and a switch portion 33b for urging the push button 33 upward are arranged at the lower portion thereof. The leaf spring 33a covers the upper portion of the switch portion 33b and protects water and dust that have entered through the gap between the lid 2 and the operation name plate 11 from directly adhering to the switch portion 33b and causing an electrical failure. ing. 34 is a push button 33
When the lock knob 34 slides in the direction of the arrow X shown in FIG. 4, the push button 33 is locked and the switch portion 33b is not turned on. When the lock knob 34 is slid in the direction of, the push button 33 is released and the switch portion 33b
Is turned on. Further, the push button 33 and the lock knob 34 are provided with the push button 33 at a position away from the center of the main body 1, and the lock knob 34 is provided on the center side of the main body 1 of the push button 33 so that the both 33, 34 move forward and backward. 2, the lock knob 34 also serves as a stopper for the handle 9 which is rotated forward.

Reference numeral 35 denotes a projecting portion having an outer shape slightly smaller than the inner shape of the substrate cover 25 formed integrally with the bottom plate 1b of the main body 1, covering the inner peripheral side surface of the substrate cover 25 so as to sandwich the control substrate 24, The water and the like that have entered from the lower portion of the main body 1 are prevented from adhering to the control board 24 by the 25 and the protruding portion 35. As shown in FIG. 6, reference numeral 36 denotes 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, which is made of a heat resistant material such as silicon. It is configured to be in close contact with the bottom surface of the inner container 15 to accurately detect the temperature of the water in the inner container 15.

In this embodiment thus constructed, first, the opening / closing mechanism 7 provided on the lid body 2 is operated to lift the lid body 2 upward, and the hinge pin of the hinge mechanism 8 is rotated as a fulcrum. The upper part of the main body 1 is opened. Then, the main body 1
The inner container 15 is filled with water, and the lid 2 is rotated in the opposite direction to cover the lid. When the push button 33 of the operation unit 10 is pressed, the control unit 23 starts energizing the heater 17, and the heater 17 generates heat to heat the water in the inner container 15. At the same time, the lamp 32 indicating that the operation unit 10 is reboiling is turned on and displayed on the lamp display unit 31. At this time, the light source of the lamp 32 is formed in a convex shape and subjected to the light diffusion process.
It can be confirmed in a wide range by 1. Further, during heating, the temperature of the water in the inner container 15 is always accurately detected by the temperature sensor 19 which is put in close contact with the bottom surface of the inner container 15 by the putty 36 to prevent invasion of steam and 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 energizing the heater 17 to keep the hot water in the inner container 15 warm, and the lamp 32 indicating that the operating section 10 is reboiled is turned off and the lamp 32 indicating that the temperature is being kept is displayed on the lamp display section 31. To be done.

Then, for example, tea is put in the inner container 15
When the hot water inside is used, the reduced amount of hot water is displayed on the water level display window 1
When the push button 33 is pressed after adding water to the inner container 15 after distinguishing it from a, the water in the inner container 15 is heated and boiled again. And hot water is always prepared.
Further, even if water or the like enters the electric water heater in the water supply and enters the operation unit 10 and the control unit 23, the leaf spring 3
Electronic components of the operation unit 10 and the control unit 23 are protected by the 3a, the substrate cover 25, and the protrusion 35.

In the above embodiment, the air pump 3 built in the lid 2 is pressurized to send compressed air to the inner container 15,
Although the present invention has been shown to be applied to an electric water heater provided with an air-type hot water supply means for supplying hot water by this, the present invention is not limited to this, and for example, a switch closes a power source to drive an internal motor. The present invention can also be applied to an electric water heater equipped with an electric hot water supply means for supplying hot water.

[0028]

As described above, according to the present invention, the main body is provided with the inner container and the heating means, the temperature detecting means, the control board and the like are arranged under the inner container, and the upper opening of the main body is covered.
In an electric water heater consisting of a push-button switch and a lid provided with an operation section having a lamp display section, etc., the lamp display section of the operation section is formed in a convex shape corresponding to the shape of the top of the lamp, and this convex shape Since the part has been subjected to light diffusion processing, you can check the light source of the lamp in a wide range,
It is possible to prevent erroneous operation due to unclear lamp.

Further, the push button switch of the operation section is composed of a switch section electrically connected to the heating means, a button section for operating the switch section, and a leaf spring for urging the button section upward. Since the upper part of the switch part is covered by the leaf spring, the switch part can be protected from the water that has entered the operating part by the leaf spring, and the reliability of the electric water heater can be prevented from malfunctioning due to an electric system failure. A high electric water heater can be obtained.

Further, since the push button switch is provided at a position away from the center of the main body of the operation section, and the lock knob for locking the push button switch is provided on the center side of the push button switch, the push button switch is turned to the operation section side. The operation of the push-button switch by the handle of the electric water heater can be prevented, and the electric water heater with high safety can be obtained.

Further, the upper and outer peripheries of the control board are covered with a board cover having a substantially convex cross-section whose lower side is opened, and the control board is provided with a projecting portion having an outer shape slightly smaller than the inner shape of the board cover provided on the bottom plate of the main body. By covering the inner peripheral side surface of the board cover so as to sandwich it, it is possible to protect the electronic components mounted on the control board from water that has entered from the bottom of the main body, and to prevent malfunction of the electric water heater due to electrical system failure. Occurrence can be prevented.

Further, since the putty made of a heat-resistant material is filled between the temperature detecting means and the holder for holding the temperature detecting means and the bottom surface of the inner container, the temperature detecting means is surely brought into close contact with the bottom surface of the inner container. The temperature of water can be detected accurately.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a plan view of an operating portion according to the present invention and its A-
FIG.

FIG. 4 is a plan view of an operating portion according to the present invention and its B-
It is a B sectional view.

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

FIG. 6 is an enlarged view of a temperature sensor portion of FIG.

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

FIG. 8 is a vertical cross-sectional view of FIG.

FIG. 9 is a plan view of an operating portion of a conventional electric water heater.

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

[Explanation of symbols]

 1 Main Body 1b Bottom Plate 2 Lid 10 Operating Part 15 Inner Container 17 Heater 18 Sensor Holder 19 Temperature Sensor 24 Control Board 25 Board Cover 31 Lamp Display 32 Lamp 33 Push Button 33a Leaf Spring 33b Switch 34 Lock Knob 35 Projection 36 putty

Front Page Continuation (72) Inventor Yoshihiro Kosano 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. An inner container is provided inside, heating means for heating water in the inner container at a lower portion of the inner container, temperature detecting means for detecting a temperature of water, and electrically controlling the heating means. A main body on which a control board and the like are arranged, a push button switch for covering the upper opening of the main body and starting energization of the heating means, and an operation section having a lamp display section for displaying an operation state by a lamp In the electric water heater comprising a lid, the lamp display part of the operation part is formed in a convex shape corresponding to the shape of the top of the lamp, and the convex part is subjected to light diffusion treatment. Electric water heater. 2. An inner container is provided inside, heating means for heating water in the inner container at a lower portion of the inner container, temperature detecting means for detecting a temperature of water, and electrically controlling the heating means. A main body on which a control board and the like are arranged, a push button switch for covering the upper opening of the main body and starting energization of the heating means, and an operation section having a lamp display section for displaying an operation state by a lamp In the electric water heater comprising a lid, a push button switch of the operating portion, a switch portion electrically connected to the heating means, a button portion for operating the switch portion, and the button portion upward. An electric water heater comprising a biasing leaf spring, and the leaf spring covering the upper portion of the switch portion. 3. An inner container is provided inside, heating means for heating water in the inner container at a lower portion of the inner container, temperature detecting means for detecting a temperature of water, and electrically controlling the heating means. A main body on which a control board and the like are arranged, a push button switch for covering the upper opening of the main body and starting energization of the heating means, and an operation section having a lamp display section for displaying an operation state by a lamp In the electric water heater comprising a lid, a push button switch is provided at a position away from the center of the main body of the operation section, and a lock knob for locking the push button switch is provided on the center side of the push button switch. An electric water heater characterized by that. 4. An inner container is provided inside, heating means for heating water in the inner container at a lower portion of the inner container, temperature detecting means for detecting a temperature of water, and electrically controlling the heating means. A main body on which a control board and the like are arranged, a push button switch for covering the upper opening of the main body and starting energization of the heating means, and an operation section having a lamp display section for displaying an operation state by a lamp In the electric water heater including a lid, the upper surface and the outer periphery of the control board are covered by a board cover having a substantially convex cross-section with an open bottom, and the inner shape of the board cover provided on the bottom plate of the main body is slightly larger than the inner shape. An electric water heater characterized in that an inner peripheral side surface of the substrate cover is covered so as to sandwich the control substrate with a projecting portion having a small outer shape. 5. An inner container is provided inside, heating means for heating water in the inner container at a lower portion of the inner container, temperature detecting means for detecting a temperature of water, and electrically controlling the heating means. A main body on which a control board and the like are arranged, a push button switch for covering the upper opening of the main body and starting energization of the heating means, and an operation section having a lamp display section for displaying an operation state by a lamp An electric water heater comprising a lid, wherein the temperature detecting means, a holder for holding the temperature detecting means, and a bottom surface of the inner container are filled with a putty made of a heat-resistant material. Water heater.