JP3125667B2 - Electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heating a stored liquid.
The present invention relates to an electric water heater that maintains heat.

[0002]

2. Description of the Related Art Conventionally, there is an electric water heater of this kind as shown in FIG. In the figure, reference numeral 1 denotes a main body constituting an outer portion, which contains a container 3 for containing a liquid 2.
Reference numeral 4 denotes a lid which usually covers the upper opening of the container 3. Reference numeral 5 denotes a heating element which is fixed to the bottom of the container 3 and has a temperature detecting device 6 attached to the center of the bottom of the bottom of the container 3. Reference numeral 7 denotes a control device that controls the energization of the heating element 5 based on an electric signal from the temperature detection device 6.

The operation of the above configuration will be described. When power is supplied, the liquid 2 is heated by the heating element 5 and its temperature rises. When the liquid 2 is brought into a boiling state, the control device 7 interrupts the energization of the heating element 5 by an electric signal from the temperature detecting device 6. After that, the control device 7 controls the energization of the heating element 5 by the electric signal of the temperature detection device 6 to keep the liquid 2 warm.

[0004] By repeating this heating and heat retaining operation,
A scale component (such as calcium carbonate) present in the liquid 2 precipitates and adheres and deposits on the inner surface of the container 3. In order to wash the scale component dirt, it was necessary to remove the scale by rubbing with a soft material such as a sponge, or to add a detergency improving agent and leave it for a few hours while keeping it warm and energized.

[0005]

However, in the above-mentioned conventional means, there is a problem that it takes a lot of time to clean, and it takes a long time of several hours until the washing of the container is completed, so that there is a problem that the drinking water is hindered. .

In order to solve this problem, a large amount of a detergency enhancer is used to improve the detergency, thereby reducing the durability of the fluorine coating applied to the inner surface of the container, or reducing the scale component and the detergency enhancer. There is a problem that hot water may be blown out of the main body during cleaning due to the generation of a large amount of carbon dioxide due to the reaction with water, and there is a risk of burns.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electric water heater that is safe and has good container cleaning properties.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. A first means comprises a main body constituting an outer portion, a container for containing a liquid inside the main body, A lid that covers the upper opening of the container, a heating element that heats the liquid, a temperature detection device that is mounted on the back side of the bottom surface of the container, and an electric signal from the temperature detection device that controls energization of the heating element. A control device, a container cleaning function of adding a predetermined amount of a detergency enhancer to the liquid, boiling the liquid, energizing the heating element for a predetermined time, and cleaning dirt such as scale attached to the inner surface of the container, and the container cleaning function and a dedicated switch for controlling, during container washing other than the dedicated switch function switch
H is an inoperable electric water heater.

The second means includes a main body constituting an outer portion,
A container for containing a liquid inside the main body, and
A lid that covers the opening, a heating element that heats the liquid,
A temperature detection device mounted on the back side of the container bottom surface, and the temperature detection device;
Controlling energization of the heating element with an electrical signal from the device
Control device and liquid by adding a predetermined amount of detergency improver to liquid
After the boiling, the heating element is energized for a predetermined time and the inner surface of the container, etc.
Container cleaning function for cleaning dirt caused by water stains attached to the surface
And a dedicated switch for controlling the container cleaning function.
Cleaning operation can be stopped only by stopping power supply during container cleaning
An electric water heater that works.

[0010] The third means is a main body constituting an outer portion,
A container for containing a liquid inside the main body, and
A lid that covers the opening, a heating element that heats the liquid,
A temperature detection device mounted on the back side of the container bottom surface, and the temperature detection device;
Controlling energization of the heating element with an electrical signal from the device
Control device and liquid by adding a predetermined amount of detergency improver to liquid
After the boiling, the heating element is energized for a predetermined time and the inner surface of the container, etc.
Container cleaning function for cleaning dirt caused by water stains attached to the surface
And a dedicated switch for controlling the container cleaning function.
The detergency improver is encapsulated in a dissolving substance that dissolves at a certain temperature
And an electric kettle.

The fourth means is that the heating element is composed of a main heating element and an auxiliary heating element.
The container cleaning function heats the liquid in the container.
After the boiling detection by the temperature detection device, the main
A heating element or the auxiliary heating element or the main heating element
The continuous heating or intermittent conduction of the auxiliary heating element.
The electric water heater described in any one of 1 to 3 above.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that a main body constituting an outer portion, a container for containing a liquid inside the main body, a lid for covering an upper opening of the container, and a liquid for heating the liquid are provided. A heating element to be heated, a temperature detection device mounted on the back side of the bottom surface of the container, a control device for controlling energization to the heating element by an electric signal from the temperature detection device, and adding a predetermined amount of a detergency improving agent to the liquid. a container washing function for washing a soiled due of scale adhering to the heating element after the liquid boils, etc. to the inside vessel surface is energized a predetermined time by, and a dedicated switch for controlling the container cleaning function, the vessel cleaning Machines other than dedicated switches
The function switch is an electric water heater that does not work
Convection on the liquid while maintaining the liquid in the container at a high temperature.
Can be raised, scales adhered to the inner surface of the container, etc.
The contamination can be performed efficiently and quickly. Also,
Clearly indicates that cleaning is in progress, and improves cleaning power by mistake
The problem of drinking hot water containing the agent can be solved.

According to the second aspect of the present invention, the outer portion is formed.
A main body, a container containing a liquid inside the main body,
A lid that covers the upper opening of the container, and a heating element that heats the liquid
And a temperature detection device mounted on the back side of the bottom of the container;
Energize the heating element with an electric signal from the temperature detector.
A control for controlling device, a predetermined amount added pressure to the detergency enhancing agent to the liquid
After the liquid boils, the heating element is energized for a predetermined time and the vessel
Container for cleaning dirt due to water scale attached to the inner surface, etc.
Cleaning function and dedicated switch for controlling the container cleaning function
During the container cleaning, the cleaning operation is performed only when the power supply is stopped.
Since it is an electric water heater that can be stopped, container washing
During cleaning, cleaning operation can be stopped only by stopping power supply.
Accidentally operate the dedicated switch to wash the container.
Avoid changing from the cleaning state to the normal state even when cleaning is started
Can be.

According to the third aspect of the present invention, the outer portion is formed.
A main body, a container containing a liquid inside the main body,
A lid that covers the upper opening of the container, and a heating element that heats the liquid
And a temperature detection device mounted on the back side of the bottom of the container;
Energize the heating element with an electric signal from the temperature detector.
Control device for controlling and adding a predetermined amount of detergent to liquid
After the liquid boils, the heating element is energized for a predetermined time and the vessel
Container for cleaning dirt due to water scale attached to the inner surface, etc.
Cleaning function and dedicated switch for controlling the container cleaning function
Detergency improver is a dissolving substance that dissolves at a certain temperature.
The temperature of the liquid is reduced due to the enclosed electric water heater.
When the temperature rises to a
Easy to dissolve in dripping liquid.
Dissolves in the upper part of the temperature detector when the improver is added
The malfunction of the temperature detection device due to the
You.

According to a fourth aspect of the present invention, the heating element is a main heating element.
And an auxiliary heating element.
After heating and detecting the boiling by the temperature detector,
The main heating element or the auxiliary heating element or the main heating element
Energize the heating element and the auxiliary heating element continuously or intermittently
An electric water heater according to any one of claims 1 to 3,
So that the liquid is continuously boiling and occurs in the container
The cleaning power can be improved by the strong convection effect of the liquid.

Embodiment 1 First, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. As shown in the figure, reference numeral 11 denotes a main body constituting an outer portion, which contains a container 13 for containing a liquid 12. A cover 14 covers the upper opening of the container 13. A heating element 15 is fixed to the bottom of the container 13.
A temperature detecting device 16 is mounted at the center on the back side of the bottom of the container 13. Reference numeral 17 denotes a control device that controls the energization of the heating element 15 based on an electric signal from the temperature detection device 16.
A dedicated switch 19 is provided in the main body operation unit, and the control device 1
7 is connected.

The operation of the above configuration will be described. In a normal water heater, when power is supplied, the liquid 12 is heated by the heating element 15 and its temperature rises. When the liquid 12 is brought into a boiling state, the control device 17 interrupts energization to the heating element 15 by an electric signal from the temperature detection device 16. Thereafter, the control device 17 controls the energization of the heating element 15 by the electric signal of the temperature detection device 16 to keep the liquid 12 warm.

At the time of cleaning the container, when a cleaning power improver 18 (such as citric acid) and the liquid 12 are added to the container 13 and power is supplied and the dedicated switch 19 is operated, the liquid in the container 13 is detected by the temperature detecting device 18. After detecting the boiling of 12, the control device 17 energizes the heating element 15 as a container cleaning function for a predetermined time, and the container cleaning can be performed efficiently and quickly.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG.
Is composed of a main heating element 15a and an auxiliary heating element 15b.
When the cleaning power improver 18 and the liquid 12 are added to the power supply 3 and the power is supplied and the dedicated switch 19 is operated, the temperature detector 1
8, after detecting the boiling of the liquid 12 in the container 13, the main heating element 15a or the auxiliary heating element 15b or the main heating element 15a and the auxiliary heating element 15a for a predetermined time as a container cleaning function.
b is continuously or intermittently energized. As a result, the continuous boiling high temperature state of the liquid 12 and the liquid 1 generated in the container 13
The cleaning power can be improved by the strong convection effect of 2.

When the temperature of the liquid 12 in the container 13 becomes constant (80 to 99.5 ° C.) during the washing of the container, the washing is interrupted or stopped to prevent hot water from spilling during the continuous boiling state. Danger can be eliminated.

During the container washing, the function switches other than the dedicated switch 19 are not activated. Thereby, it can be clearly expressed that the washing is being performed, and the problem of accidentally drinking hot water containing the cleaning power improving agent can be solved.

Further, during the container cleaning, the cleaning operation can be stopped only by stopping the power supply. Even if the dedicated switch 19 is operated by mistake and the container cleaning function is operated, it is possible to avoid the cleaning state to the normal state. Can be.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. As shown in the figure, when the temperature of the liquid 12 rises to a certain temperature by enclosing the detergency enhancer 18 with a dissolving body 20 (molded with gelatin or the like) that dissolves at a certain temperature, the detergency enhancer 18 Is the melt 20
Since the liquid 12 is easily discharged and dissolved in the liquid 12, when the liquid 12 is charged with the cleaning power improver 18 in a cold state, the temperature detector 16 malfunctions due to being completely dissolved and deposited above the temperature detector 18. Can be avoided.

[0028]

As is apparent from the above description of the embodiment, according to the first aspect of the present invention, the detergency improving agent is added to the liquid, and after the boiling is detected, the heating element is energized for a predetermined time and the inner surface of the container is applied. Containers can be efficiently and quickly cleaned by adding a dedicated switch for cleaning dirt due to adhered scale or the like. Also, during cleaning the container, use the dedicated switch.
Function switches other than the
Can be clearly expressed, and by mistake
The problem of drinking hot water can be solved.

According to the second aspect of the present invention, the cleaning operation can be stopped only by stopping the power supply during the cleaning of the container, so that the cleaning can be performed even if the dedicated switch is operated by mistake and the container cleaning function is started. The state can be avoided from the normal state.

According to the third aspect of the present invention, since the detergency improving agent is dissolved at a constant temperature and enclosed by the dissolving body, the detergency improving agent is used when the liquid temperature rises to a certain temperature. Is discharged outside the dissolving body and readily dissolves in the liquid, so that when the detergency improving agent is injected in a cold state, the liquid does not completely dissolve and accumulate on the upper part of the temperature detecting device, thereby preventing malfunction of the temperature detecting device.

According to the fourth aspect of the present invention, after detecting the boiling of the liquid in the container by the temperature detecting device, the main heating element, the auxiliary heating element, or the main heating element and the auxiliary heating element are continuously energized within a predetermined time. Alternatively, by providing intermittent power supply as a container cleaning function using a dedicated switch,
By heating the main heating element and the auxiliary heating element, a stronger convection can be obtained, and a higher detergency can be secured.

As described above, the present invention can realize an electric water heater that is safe and has good operability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an electric water heater according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged view of a main part showing the electric water heater.

FIG. 3 is an enlarged sectional view of a main part showing an electric water heater according to Embodiment 2 of the present invention.

FIG. 4 is a diagram showing an energization control of the electric water heater.

FIG. 5 is a diagram showing energization control of the electric water heater.

FIG. 6 is a sectional view showing an electric water heater according to Embodiment 3 of the present invention.

FIG. 7 is a sectional view showing a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Main body 12 Liquid 13 Container 14 Lid 15 Heating element 15a Main heating element 15b Auxiliary heating element 16 Temperature detecting device 17 Control device 18 Detergency improving agent 19 Dedicated switch 20 Melting body

Continuation of the front page (72) Inventor Yukito Kunihiro 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-269922 (JP, A) JP-A-5-285044 (JP) JP-A-63-171519 (JP, A) JP-A-3-65521 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/21 101

Claims (4)

(57) [Claims] 1. A main body constituting an outer portion, a container for housing a liquid inside the main body, a lid covering an upper opening of the container, a heating element for heating the liquid, and a back side of the bottom surface of the container. A mounted temperature detection device, and a control device that controls energization of the heating element with an electric signal from the temperature detection device,
A container cleaning function for adding a predetermined amount of a detergency improver to a liquid and then applying electricity to the heating element for a predetermined period of time after boiling the liquid to clean dirt such as scale attached to the inner surface of the container, and a dedicated control for controlling the container cleaning function With switch, during container cleaning
Is an electric water heater that does not operate any function switches other than the dedicated switch . 2. A main body constituting an outer portion, and inside the main body.
Covers a container for containing a liquid and an upper opening of the container.
A lid, a heating element for heating the liquid, and a back side of the bottom of the container.
A temperature detection device attached to the
A control device that controls energization of the heating element with a pneumatic signal,
Add a predetermined amount of detergent to the liquid and boil the liquid.
Water adhering to the inner surface of the container etc.
A container cleaning function for cleaning dirt such as dirt, and the container
Has a dedicated switch to control the cleaning function, while the container is being cleaned
Is an electric water heater that can stop the cleaning operation only when the power supply is stopped . 3. A main body constituting an outer portion, and inside the main body.
Covers a container for containing a liquid and an upper opening of the container.
A lid, a heating element for heating the liquid, and a back side of the bottom of the container.
A temperature detection device attached to the
A control device that controls energization of the heating element with a pneumatic signal,
Add a predetermined amount of detergent to the liquid and boil the liquid.
Water adhering to the inner surface of the container etc.
A container cleaning function for cleaning dirt such as dirt, and the container
Has a dedicated switch to control the cleaning function, improving the cleaning power
An electric water heater containing a dissolving agent that dissolves at a certain temperature . 4. The heating element comprises a main heating element and an auxiliary heating element.
The container cleaning function heats the liquid in the container and
After detecting boiling, the main heating element or
Is the auxiliary heating element or the main heating element and the auxiliary heating element.
4. The method according to claim 1, wherein the body is energized continuously or intermittently.
An electric water heater according to claim 1 .