JP3201295B2 - 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 an electric water heater for heating and keeping a liquid stored in a container.

[0002]

2. Description of the Related Art Conventionally, an electric water heater of this kind is shown in FIG.
6 to FIG. Hereinafter, the configuration of the conventional electric water heater will be described in detail. 5 to 6, reference numeral 1 denotes a main body constituting an outer shell, which contains a container 3 for accommodating the liquid 2. Reference numeral 4 denotes a spout placed on the upper part of the main body 1, and the container 3 is placed on the central opening. Reference numeral 5 denotes a heating element for heating and keeping the temperature of the liquid 2 fixed to the bottom of the container 3. Reference numeral 6 denotes a cover for covering the upper opening of the container 3, reference numeral 7 denotes a pump for discharging the liquid 2, reference numeral 8 denotes an outflow path, and reference numeral 9 denotes a circulation path. Reference numeral 10 denotes a case placed inside the spout 4, and an upper case 10 a formed with a discharge port 11 for discharging the liquid 2 led out by the pump 7 to the outside of the main body 1 and a circulation port circulating into the container 3. 1
2 comprises a lower case 10b. One of the outflow paths 8 communicates with the lower case 10b and the other communicates with the pump 7, one of the circulation paths 9 communicates with a circulation port 12 formed in the lower case 10b, and the other communicates with the container 3.

[0003] Inside the case 10 is a hot water outlet control port 10c for making the upper case 10a and the lower case 10b communicate with each other.
And a drain hole 10d. A slidable control valve 13 that closes the tap control port 10c during normal and circulation and opens when tapping is provided by a valve spring 14 at the tap control port 10c. The check valve 15 is urged upward, and has a check valve 15 in the water drain hole 10d to normally open the water drain hole 10d and close the water drain hole 10d when the main body is overturned. Above the control valve 13, the operation knob 1 held by the spout 4
6 is urged upward by a knob spring 17 and is mounted on the case 10 by an external operation.
The control valve 13 can be slid downwardly through 8. The switch 19 works with the operation knob 16 to control the operation of the pump 7.

The operation of the above configuration will be described. When the operation knob 16 is pressed by an external operation, the operation knob 16 is pressed down against the bias of the knob spring 17,
In conjunction with this, the switch 19 operates to drive the pump 7 to draw out the liquid 2 in the container 3 into the outflow path 8. Further, when the operating knob 16 is pressed, the operating knob 16 comes into contact with the control valve 13 via the case packing 18, and the control valve 13 slides downward against the bias of the valve spring 14.

In this state, when the hot water control port 10c is opened, the outflow path 8 and the discharge port 11 are in communication with each other, and the liquid 2 in the container 3 led out by the pump 7 is discharged. Through the opening of the hot water control port 10c through the discharge port 11 to the outside. When the pressing operation of the operation knob 16 is stopped to reduce the pressing force, the operation knob 16 is pushed upward by the urging of the knob spring 17, and the control valve 13 is accordingly moved by the urging of the valve spring 14. It slides upward, and finally the tapping control port 10c is closed by the control valve 13, the outflow path 8 and the discharge port 11 are shut off, and the outflow to the outside is stopped. As the pressing force is further reduced, the operation knob 16
By operating the switch 19, the operation of the pump 7 is stopped, and the discharge of the liquid 2 in the container 3 is terminated.

After the tapping operation, the upper case 10
The liquid 2 collected in a is returned from the lower case 10b to the outflow path 8 and the circulation path 9 through the draining hole 10d in the open state. During circulation, the hot water supply control port 10c is closed, so that the outflow path 8 and the lower case 10
The liquid 2 in the container 3 drawn out by the pump 7 is circulated from the circulation port 12 via the outflow path 8 to the container 3 via the circulation path 9 through the circulation path 9. . At this time, the check valve 15 is configured to close the drain hole 10d by the water pressure of the liquid 2.

[0007]

However, in the above-described conventional configuration, if the above-mentioned functions performed by the drain hole 10d and the check valve 15 are reduced due to adhesion of water scale, biting of foreign matter, etc., after the tapping operation is completed. The hot water returns poorly and the upper case 1
There has been a problem that the liquid 2 accumulated in Oa scatters from the discharge port 11 during transportation of the main body. Further, there is a problem that the circulating liquid 2 leaks from the discharge port 11 to the outside of the main body 1 through the drain hole 10d due to the same cause, and wets the surroundings.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide an electric water heater which is improved in usability, and which is excellent in the flow of hot water and the shortage of hot water.

[0009]

According to the present invention, there is provided a circulation port control valve for opening and closing a circulation port and a discharge port inside a case, and a discharge port control valve. Two control valves are interlocked so that one of the outlet control valves is in an open state and the other is in a closed state.
With the above configuration, when the tapping operation is completed, the circulation port control valve opens the circulation port, and the discharge port control valve closes the discharge port. In this state, the inside of the case and the outside of the main body are shut off, so that it is possible to prevent the liquid accumulated in the case from scattering from the discharge port during transportation of the main body. Further, also at the time of circulation, the inside of the case and the outside of the main body are shut off, so that it is possible to prevent the liquid at the time of circulation from leaking from the discharge port to the outside of the main body.

[0010]

According to a first aspect of the present invention, there is provided a main body constituting an outer shell, a spout mounted on an upper part of the main body, a container for accommodating a liquid, and a container inside the container. A heating element for heating the liquid, a cover for covering the upper opening of the container, a pump for discharging the liquid in the container, and a liquid discharged by the pump inside the spout for discharging the liquid to the outside of the main body. A case in which a discharge port and a circulation port that circulates into the container are formed; an outflow path that connects the pump and the case; a circulation path that connects the container and the case; A circulation port control valve for opening and closing the circulation port and the discharge port and a discharge port control valve are provided, and the circulation port control valve and the discharge port control valve are linked so that when one is open, the other is closed. Electric water heater with two control valves It is an instrument to.

According to this configuration, the inside of the case and the outside of the main body are shut off, so that the liquid accumulated in the case can be prevented from scattering from the discharge port when the main body is transported. Further, also at the time of circulation, the inside of the case and the outside of the main body are shut off, so that it is possible to prevent the liquid at the time of circulation from leaking from the discharge port to the outside of the main body.

According to a second aspect of the present invention, the control valve comprises:
The circulation port control valve and the discharge port control valve are attached by connecting members. With this configuration, the above configuration can be easily implemented.

According to a third aspect of the present invention, the control valve comprises:
At least one of the circulation port control valve and the discharge port control valve is formed integrally with the connecting member. With this configuration, the number of components constituting the control valve can be reduced and can be easily implemented.

According to a fourth aspect of the present invention, the discharge port comprises:
The discharge port and the discharge port control valve are in contact with each other on an inclined surface, and at least one of a notch or a rib is provided on the inner surface of the discharge port. With this configuration, at the end of the tapping operation, the liquid that tends to remain in the contact portion between the inner surface of the discharge port and the discharge port control valve is smoothly drawn out of the main body at the same time as the end of the tapping operation. Performance can be improved. Further, unstable flow of the molten metal due to the influence of the control valve provided inside the case can be improved, and rectification at the time of tapping can be improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The characteristic configuration of the present embodiment relates to a function of preventing the liquid from scattering when the main body is transported and a function to prevent the liquid from leaking during the circulation.

In FIG. 1 to FIG. 3, reference numeral 21 denotes a main body constituting an outer shell, which contains a container 23 for storing a liquid 22 therein. Reference numeral 24 denotes a spout placed on the upper part of the main body 21, and a container 23 is placed on the central opening. 25 heats the liquid 22
A heating element for keeping the temperature fixed to the bottom of the container 23.
26 is a lid covering the upper opening of the container 23, and 27 is the liquid 2
A pump for deriving 2, 28 is an outflow path, and 29 is a circulation path.

Numeral 30 denotes a case placed inside the spout 24. The case 30 has a discharge port 31 for discharging the liquid 22 led out by the pump 27 to the outside of the main body 21 and a circulation port 32 for circulating into the container 23. are doing. One of the outflow paths 28 communicates with the case 30, the other communicates with the pump 27, and the circulation path 2
One of 9 communicates with a circulation port 32 formed in the case 30, and the other communicates with the container 23. Inside the case 30,
A circulation port control valve 33a for opening and closing the circulation port 32 and the discharge port 31
And a discharge port control valve 33b, and two control valves 33, which interlock the circulation port control valve 33a and the discharge port control valve 33b such that when one is open, the other is closed, are urged by a valve spring. Have been. Above the circulation port control valve 33a, an operation knob 36 held by the spout 24 is urged upward by a knob spring 37, and is circulated through a case packing 38 attached to the case 30 by an external operation. The discharge port control valve 33b is slidable upward, in conjunction with the lower portion 33a. Switch 3
9 controls the operation of the pump 27 in conjunction with the operation knob 36.

The operation of the above configuration will be described. When the operation knob 36 is pressed by an external operation, the operation knob 36 is pressed downward against the bias of the knob spring 37,
In conjunction with this, the switch 39 operates to drive the pump 27 to draw out the liquid 22 in the container 23 into the outflow path 28. Further, when the operation knob 36 is pressed, the operation knob 36 is moved through the case packing 38 to the circulation port control valve 33.
a, the circulation port control valve 33a slides downward against the bias of the valve spring 34, and in conjunction with this, the discharge port control valve 33b slides upward. This state is shown in FIG.

In this state, the circulation port 32 is closed and the discharge port 31 is opened, so that the outflow path 28 and the discharge port 31 are in communication with each other.
The liquid 22 in the container 23 led out by the
Through the discharge port 31 to the outside. When the pressing operation of the operation knob 36 is stopped and the pressing force is reduced, the operation knob 36 is pushed upward by the urging of the knob spring 37, and accordingly, the circulation port control valve 33a
Slides upward by the urging of the valve spring 34, and in conjunction with this, the discharge port control valve 33b slides downward. Eventually, the circulation port 32 is opened and the discharge port 31 is closed, the outflow path 28 and the discharge port 31 are shut off, and the outflow to the outside is stopped. When the pressing force is further reduced, the operation knob 36 operates the switch 39 to stop the driving of the pump 27, and the operation of the liquid 2 in the container 23 is stopped.
2 is completed. This state is shown in FIG.

In this state, the circulation port 32 is in the open state and the discharge port 31 is in the closed state, so that the liquid 22 collected in the case 30 after the end of the tapping operation is discharged to the outflow path 28 and the open circulation port. Circulation route 2 through 32
It is configured to return to the 9 side. Similarly, during circulation, the circulation port 32 is open and the discharge port 31 is closed, so that the outflow path 28 and the circulation port 32 formed in the case 30 are in communication with each other. The derived liquid 22 in the container 23 is configured to circulate from the circulation port 32 via the outflow path 28 to the container 23 via the circulation path 29.

Therefore, according to this configuration, two control valves 33 are provided inside the case that are linked so that one of the circulation port control valve 33a and the discharge port control valve 33b is closed when the other is closed. When the tapping operation is completed, the circulation port control valve 33a opens the circulation port 32 and the discharge port control valve 33b closes the discharge port 31.

In this state, the inside of the case 30 and the outside of the main body 21 are shut off, so that the liquid 22 collected in the case 30 can be prevented from scattering from the discharge port 31 during transportation of the main body. In addition, the case 30
Since the inside and the outside of the main body 21 are in a cutoff state, the liquid 22 during circulation can be prevented from leaking from the discharge port 31 to the outside of the main body 21.

In this embodiment, as shown in FIGS. 1 to 3, the circulation port control valve 33a and the discharge port control valve 33b are connected by a connecting member 33c. 33c are integrally formed.

Therefore, according to this configuration, the control valve 3
3 can be reduced in number and can be easily implemented.

As shown in FIG. 4, the discharge port 31 and the discharge port control valve 33b are in contact with each other on an inclined surface, and a cutout 31a and a rib 31b are provided on the inner surface of the discharge port 31. .

Therefore, according to this configuration, the liquid 22 at the end of the tapping operation is discharged from the inner surface of the discharge port 31 to the discharge port control valve 33b.
Even if the discharge port 31 is to remain at the contact portion, the inclination provided at the contact portion between the discharge port 31 and the discharge port control valve 33b and the discharge port 31
Since the hot water is supplied to the outside of the main body 21 at the same time as the end of the tapping operation by the notch 31a on the inner surface, the discharge port 31 can be easily drained. Further, even when an unstable hot water flow occurs due to the influence of the control valve 33 provided inside the case 30, the flow rectification at the time of hot water can be improved by the rib 31b provided on the inner surface of the discharge port 31.

[0027]

As is clear from the description of the above embodiment,
According to the first aspect of the present invention, two control valves that are linked to each other so that one of the circulation port control valve and the discharge port control valve that opens and closes the circulation port and the discharge port is closed when the other is open. , The circulation port control valve opens the circulation port and the discharge port control valve closes the discharge port. Therefore, in this state, the inside of the case and the outside of the main body are shut off, so that the liquid accumulated in the case after the hot water supply operation is scattered from the discharge port when the main body is transported, or the circulating liquid is discharged from the discharge port to the outside of the main body. Can be avoided.

Further, since the circulation port control valve and the discharge port control valve are attached by the connecting member as in the second aspect of the invention, the above configuration can be easily implemented.

Furthermore, since at least one of the circulation port control valve and the discharge port control valve is integrally formed with the connecting member, the number of parts constituting the control valve can be reduced. And can be easily implemented.

Further, the discharge port is brought into contact with the discharge port control valve on an inclined surface and at least one of a notch or a rib is provided on the inner surface of the discharge port, thereby completing the tapping operation. At this time, the liquid remaining at the contact portion between the inner surface of the discharge port and the discharge port control valve is smoothly discharged to the outside of the main body at the same time as the end of the tapping operation, so that the discharge port can be more easily drained. Further, the unstable flow of the molten metal due to the influence of the control valve provided inside the case can be improved, and the rectification can be improved.

From the above, it is possible to provide an electric water heater that improves the usability during transportation and circulation of the main body, and that is excellent in the flow of hot water and the drainage of hot water.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part of the electric water heater of the present invention at the time of tapping.

FIG. 3 is an enlarged sectional view of a main part of the electric water heater of the present invention after tapping and during circulation.

FIG. 4 is an enlarged sectional view of a main part showing a discharge port of the electric water heater of the present invention.

FIG. 5 is a sectional view showing a conventional electric water heater.

FIG. 6 is an enlarged sectional view of a main part showing a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Main body 23 Container 24 Spout 25 Heating element 26 Lid 27 Pump 28 Outflow path 29 Circulation path 30 Case 31 Discharge port 32 Circulation port 33 Control valve 33a Circulation port control valve 33b Discharge port control valve

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47J 27/21 101

Claims (4)

(57) [Claims] 1. A main body constituting an outer shell, a spout placed on an upper part of the main body, a container for storing a liquid, a heating element for heating the liquid in the container, and an upper opening of the container. A case in which a lid, a pump for drawing out the liquid in the container, and a discharge port for discharging the liquid drawn out by the pump to the outside of the main body and a circulation port for circulating to the inside of the container are formed inside the spout. An outflow path connecting the pump and the case; a circulation path connecting the container and the case; a circulation port control valve for opening and closing the circulation port and the discharge port inside the case; and a discharge port. An electric water heater provided with a control valve and having two control valves interlocked so that when one of the circulation port control valve and the discharge port control valve is open, the other is closed. 2. The electric water heater according to claim 1, wherein the circulation port control valve and the discharge port control valve are attached by a connecting member. 3. The electric water heater according to claim 1, wherein at least one of the circulation port control valve and the discharge port control valve is integrated with the connecting member. 4. The electric water heater according to claim 1, wherein the discharge port and the discharge port control valve abut on an inclined surface, and at least one of a notch or a rib is provided on an inner surface of the discharge port.