JP3175585B2 - 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 a configuration of a falling outflow prevention mechanism having a function of controlling the amount of hot water discharged from an electric water heater that keeps heat and leads out of the body.

[0002]

2. Description of the Related Art Conventionally, an electric water heater of this kind is shown in FIG.
To FIG. 8. In FIG. 1, reference numeral 1 denotes a body constituting an outer portion, which contains a container 2 containing a liquid 3 therein. Reference numeral 4 denotes a spout, on which the container 2 is placed at the center opening. Reference numeral 5 denotes a heating element for heating the liquid 3, which is fixed to the bottom of the container 2. Reference numeral 6 denotes a lid, 7 denotes a pump, 8 denotes a tapping path which also serves as a water level display of the liquid 3 in the container 2, one of which is connected to a tapping port 9 of the spout 4, and the other of which is connected to the pump 7. When there is an opening 17 formed by the outlet 10 and the control valve 11 in the middle of the hot water outlet 8, the pump 7 discharges the stored liquid 3. The opening 17
The flow rate can be adjusted by limiting the size of the opening area. Reference numeral 18 denotes a sliding portion formed between the outflow port 10 and the outer periphery of the control valve 11, and is set to have a minimum opening cross-sectional area in the outflow channel 8. The control valve 11 is urged upward by a spring 12, and the tap hole 8 and tap hole 9 are normally shut off. Above the control valve 11, the spout 4
The operation knob 13 attached to the control valve 11 is urged upward by a spring 14 so that the control valve 11 can be slid downward through a packing 15 by an external operation. The switch 16 works with the operation knob 13 to control the operation of the pump 7.

The operation of the above configuration will be described. When the operation knob 13 is pressed by an external operation, the operation knob 13 is pushed down against the bias of the spring 14, and the switch 16 is operated in conjunction therewith to drive the pump 7 to drive the liquid 3 in the container 2. It is led out into the hot water path 8. Further, when the operation knob 13 is pressed, it comes into contact with the control valve 11 via the packing 15 and slides downward against the bias of the spring 12.

In this state, the outlet 10 and the control valve 1
By providing the opening 17 formed by 1, the shutoff between the tapping path 8 and the tapping port 9 is released and a communicating state is established, and the liquid 3 in the container 2 led out by the pump 7 is passed through the tapping path 8. Through the opening 17 formed by the outlet 10 and the control valve 11, the hot water can be discharged from the tap 9 to the outside.

When the pressing operation of the operating knob 13 is stopped and the pressing force is reduced, the operating knob 13 is pushed upward by the urging of the spring 14, and the control valve 11 is thereby energized by the urging of the spring 12. Slide up,
Eventually, the tapping path 8 and tapping hole 9 are shut off by the control valve 11, and the tapping to the outside is stopped. When the pressing force is further reduced, the operation knob 13 comes into contact with the switch 16 to operate, thereby stopping the driving of the pump 7 and causing the container 2 to move.
The liquid 3 in the inside is configured to be terminated.

[0006] Even when the main body falls, since the tapping path 8 and the tapping port 9 are shut off by the control valve 11 urged upward by the spring 12, the liquid 3 in the container 2 retains the liquid 3 in the tapping path 8. Through the through hole.

[0007]

However, in the above-mentioned conventional configuration, when a small obstacle such as water scale adheres to the sliding portion 18 of the outflow port 10 and the control valve 11 and the sliding ability is reduced, The spring 12 cannot be urged upward, and the control valve 11 cannot shut off the tapping path 8 and the tapping port 9. When the main body is erroneously turned over, the liquid 3 contained in the container 2 is discharged from the tapping path. There is a problem that the liquid leaks out of the main body through the connector 8.

The sliding portion 1 between the outlet 10 and the control valve 11
If a large gap 8 is provided, there is a problem that even if the opening area of the opening 17 is adjusted, it is not possible to adjust the flow rate when tapping water from the tap hole 9 to the outside.

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 in which a control valve can surely shut off a hot water path and a hot water outlet, and has good operability.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. A flow control mechanism is provided in a tapping path for guiding a liquid in a container to a tap through a pump. Equipped with a slidable control valve that normally shuts off the hot water path, and a valve packing made of an elastic member that operates in synchronization with sliding of the control valve inside a flow path wall installed near the outlet. And a gap Z between the flow path wall and the valve packing.
Is smaller than a gap X between the outflow port and the control valve.
An electric water heater characterized in that the control valve can be prevented from malfunctioning even if a small obstacle such as water scale enters the flow path for drawing out the liquid in the container to the outside. This prevents the liquid in the container from leaking to the outside when the main body falls down accidentally when the operation is not performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 in the electric water heater of the present invention accommodates a body constituting an outer portion, a spout placed on the upper portion of the body, and a liquid provided inside the body. A container, a heating element that is fixed to the container and heats the liquid, and a lid that covers an upper opening of the container,
A flow control mechanism is provided in a tapping path for guiding the liquid in the container to a tapping port via a pump, and the flow rate control mechanism includes a slidable control valve that always shuts off the tapping path, and a vicinity of the outlet. A valve packing made of an elastic member that operates in synchronization with the sliding of the control valve is provided inside the flow path wall installed in the control valve, and a gap Z between the flow path wall and the valve packing is formed between the flow outlet and the outlet. Since the electric water heater is characterized by being smaller than the gap X with the control valve , even if a minute obstacle such as water scale enters the flow path for leading the liquid in the container to the outside, the control is performed. The malfunction of the valve can be avoided, and the liquid in the container can be prevented from flowing out to the outside when the main body falls down when the tapping operation is not performed.

[0012] Further, the invention according to claim 2 provides the invention according to claim 1.
In addition to the above-mentioned invention, the gap X between the outlet and the control valve is
At the opening to the inside of the container of the outlet path leading the liquid in the pump to the pump
It was made larger than the maximum opening dimension Y of the provided filter.
Things.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. In the figure, reference numeral 21 denotes a body constituting an outer portion, which contains a container 22 for accommodating a liquid 23. Reference numeral 24 denotes a spout in which the container 22 is placed at the center opening. 25 is a heating element for heating the liquid 23,
It is fixed to the bottom part. Reference numeral 26 denotes a pump, which is connected by a water conduit 27 through a mesh filter 28 formed of metal or resin provided on the bottom of the container 22.
The stored liquid 23 can be heated.

29 is a lid, 30 is the liquid 23 in the container 22
One of which is connected to the tap 31 of the spout 24, the other is connected to the pump 26, and the outlet 39 of the flow rate adjusting mechanism 47 provided on the way is slidable. A simple control valve 32 is provided.

The gap X set from the opening area of the outlet 39 and the opening of the control valve 32 is set to be equal to or larger than the maximum opening dimension Y set from the opening area of the filter 28. Normal time,
The control valve 32 is urged upward by a spring 33, and the tapping path 30 and the tapping port 31 are shut off. Also,
A control valve 32 provided with a valve packing 35 formed of an elastic member is in contact with an inner surface of the outlet 39, and is tapered in a direction from the tapping path 30 to the tapping port 31.

Numeral 40 denotes a rib for urging the sliding portion 45 of the control valve 32 with the outflow port 39, and has a substantially triangular cross section in order to increase the opening area of the outflow port 39. Control valve 3
2 is set so that the opening area of the opening 36 can be adjusted at the sliding position. A valve packing 35 that operates in synchronization with the sliding of the control valve 32 is provided inside the substantially cylindrical flow path wall 34 installed near the outlet 39, and the inside of the flow path wall 34 and the outside of the valve packing 35 are provided. The gap Z set from the opening area formed by the diameter is set to be equal to or smaller than the gap X between the outflow port 39 and the control valve 32. Therefore, the gap in the channel is Z <
The relationship is Y <X. In addition, valve packing 35
Is provided with a thin portion 46 at a part thereof.

Further, a plurality of triangular cuts are formed at the front end of the flow path wall 34 in order to prevent the flow path having the opening area formed by the flow path wall 34 and the valve packing 35 from being sharply narrowed. A groove 38 is provided.

Above the control valve 32, an operation knob 41 attached to the spout 24 is urged upward by a spring 42, and the control valve 32 can be slid downward through a packing 43 by an external operation. . Also, the switch 44
Controls the operation of the pump 26 in conjunction with the operation knob 41.
Reference numeral 37 denotes a minute obstacle such as water scale, in which a mineral component such as Ca, Mg, or Cu contained in the liquid 23 (tap water) charged into the container 22 is heated by the heating element 25 and deposited. It is floating in the container 22.

The operation of the above configuration will be described. When the operation knob 41 is pressed by an external operation, the operation knob 41 is pressed down against the bias of the spring 42, so that the control valve 32 is also pressed down against the bias of the spring 33. At this time, since the tap hole 30 and the tap hole 31 have the opening 36 formed by the outlet 39 and the valve packing 35 in the flow rate adjusting mechanism 47, a flow path is formed. Further, when the operation knob 41 is pressed, the switch 44 is operated and the pump 26 is driven, so that the liquid 23 in the container 22 is separated from the filter 28, the water conduit 27, the tap water 30, the inner diameter of the flow path wall 34 and the valve packing 35. Gap Z formed with outer diameter, outlet 39 and control valve 32
Through the sliding portion gap X and the opening 36, the liquid 23 in the container 22 can be discharged from the tap hole 31 to the outside. The amount of hot water to the outside is adjusted by pressing the operation knob 41 to change the opening area of the opening 36 formed by the control valve 32 and the outlet 39 after passing through the minimum gap Z in the flow path. Can be.

When the operation knob 41 is pressed, the opening 36
When the opening area is small, the water hammer due to the force of the hot water supplied from the pump 26 can be secured and reduced by the cutout groove 38 of the flow path wall 34 at the time of starting pressing. When the pressing force of the operation knob 41 is reduced, the operation knob 41 is pushed upward by the urging of the spring 42, stops the driving of the pump 26 by operating in contact with the switch 44, and the liquid 23 is discharged to the outside. Stop the hot water. Further, when the pressing force of the operation knob 41 is reduced, the control valve 32 is also pushed upward by the bias of the spring 33, and the tapping path 30 and the tapping port 31 are shut off again.

When the operation of heating the liquid 23 by the heating element 25 to maintain the temperature is repeated, minute obstacle water 37 such as water scale is generated and floats in the container 22. In this state, when the operation knob 41 is operated to drive the pump 26 as described above, the inside diameter of the tapping path 30, the inner diameter of the flow path wall 34, and the valve packing 35 are passed through the filter 28 provided on the bottom surface of the 22. The liquid 23 in the container 22 is discharged from the tap hole 31 to the outside through the gap Z formed by the outer diameter of the container and the gap X between the outflow port 39 and the sliding portion 36 of the control valve 32. At this time, the minute obstacle water 37 in the container 22 having the maximum opening dimension Y or less of the filter 28 is discharged to the outside simultaneously with the liquid 23.

The small obstacle 37 discharged to the outside at the same time as the liquid 23 has an outflow wall 34 provided for adjusting the flow rate because the gap in the flow path has a relationship of Z <Y <X.
And other than the gap Z formed by the valve packing 35. Further, even when the small obstacle 37 adheres to the gap Z formed by the outflow wall 34 and the valve packing 35, the operation knob 41 does not stay in a certain place during operation because the valve packing 35 is an elastic member. Be eliminated. Further, since the valve packing 35 is easily deformed in one direction by the thin portion 46, the removal of the minute obstacle 37 by the operation of the operation knob 41 is promoted.

The inner surface of the outlet 39 is connected to the hot water path 30.
The small obstacle 37 is easily discharged to the tap 31 side because the taper is formed in the direction of the tap 31 from the tap. Further, a rib 4 for urging the positions of the outlet 39 and the control valve 32 is provided.
0 is set to be substantially triangular, so that the outlet 3
Since the opening area formed by the valve 9 and the valve packing 35 is large, the minute obstacle 37 can easily pass through.

As described above, when the operation knob 41 is not operated after the tapping is completed, the tapping path 30 and the tapping port 31 are reliably shut off by not being affected by the minute obstacle 37. The outflow of the liquid 23 in the container 22 at the time of falling can be reliably prevented.

[0025]

As is clear from the above , according to the present invention,
For example, even if minute obstacles such as water scale enter the flow path that leads the liquid inside the container to the outside, the control valve can be prevented from malfunctioning, and the body may accidentally fall over when the tapping operation is not performed In this case, the liquid in the container can be prevented from flowing out to the outside.

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged projection view of a filter in the electric water heater.

FIG. 4 is a top view of an outlet and a control valve in the electric water heater.

FIG. 5 is an enlarged sectional view of a main part of the electric water heater at the time of tapping.

FIG. 6 is a sectional view of the vicinity of a valve packing in the electric water heater.

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

FIG. 8 is an enlarged sectional view of a main part showing a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Body 22 Container 24 Injection port 25 Heating element 26 Pump 28 Filter 29 Lid 30 Tap hole 31 Tap hole 32 Control valve 34 Flow path wall 35 Valve packing 38 Groove 39 Outflow port 46 Thin part 47 Flow rate adjustment mechanism

Continuation of the front page (72) Inventor Yoshiyuki Okabe 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-279115 (JP, A) JP-A-5-68640 (JP) , A) JP-A-8-89420 (JP, A) JP-A 61-30421 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/21 101

Claims (2)

(57) [Claims] 1. A body constituting an outer portion, a spout placed on an upper portion of the body, a container containing a liquid provided inside the body, a heating element fixed to the container and heating the liquid, A cover for covering an upper opening of the container, and a flow control mechanism in a tapping path for guiding the liquid in the container to a tapping port via a pump, wherein the flow control mechanism always shuts off the tapping path. A slidable control valve, comprising a valve packing made of an elastic member that operates in synchronization with sliding of the control valve inside a flow path wall installed near the outlet, and the flow path wall and An electric water heater, wherein a gap Z between the packing and the valve packing is smaller than a gap X between the outlet and the control valve. 2. A gap X between an outlet and a control valve is defined as
Provided at the opening to the inside of the container for the lead-out path for guiding the liquid to the pump
2. The electric water heater according to claim 1, wherein the size of the filter is larger than a maximum opening dimension Y of the filter .