JPH05293052A - Electric water boiler - Google Patents

Abstract

PURPOSE:To improve safety and usability of the title water boiler. CONSTITUTION:An inner lid 23 of a lid 20 which covers the upper opening part of a container 1 is provided with a plurality of holes 28, 29 with valves 30a, 30b for a passage through the container 1, thus preventing hot water leak due to the rise of internal pressure caused by hole clogging when the lid is closed.

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 capable of heating and retaining a contained liquid and pouring the liquid into an external container.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a lid of an electric water heater has an outer lid 101 and an inner lid 10 on the container side.
The steam passage 103 is connected between the two and works to let the steam in the container escape to the outside. At this time, each of the inner lid and the outer lid had an opening connected to the steam passage.

On the other hand, in the electric water heater, it is necessary to minimize the outflow of hot water in the container when the body falls, and therefore, when the valve 104 is provided in the opening portion of the inner lid 102 and the body falls. The valve 104 closed the opening to prevent the liquid in the container from flowing out.

An opening 105 is provided in a part of the inner lid 102, and ribs are arranged around the inner lid 102 to form a valve seat. The valve 104 provided here is between the decorative frame 106 provided on the container side of the inner lid. The valve is a decorative frame 1 when the lid is closed.
The opening 105 fell to the opening 06 and was in an open state, and at the time of falling, the valve 104 moved toward the opening 105 and was blocked.

[0005] The lid is opened and closed by a rotary motion with a shaft 107 at the rear of the spout placed on the upper part of the container as a fulcrum. At this time also, the valve 104 has the valve seat portion as the opening portion. It was moving between the decorative frames.

[0006]

However, in the above structure, when the lid is opened, the valve closes the opening of the inner lid, and when the lid is closed, the valve normally falls due to the rotational movement of the lid and the weight of the valve. Open the opening by opening the lid, but if you close the lid with force, the valve will keep closing the opening, and the valve will drop from the opening due to the rise in pressure due to the large amount of steam boiling in the container. Instead, it remains closed and the internal pressure in the container rises, causing hot water in the container to come out of the discharge port, causing hot water to hit the body, causing burns, and wetting the floor.

On the other hand, an escape path is formed in the opening where the valve enters so that steam will not escape from the gap and the valve will not be closed even if the internal pressure rises. Some hot water is stored in a water storage part provided in a part of the inner lid and covers the water inside the container when the lid is closed again, but these have a complicated structure such as a vapor passage structure of the lid and a water storage part. It was. Therefore, it was inevitably expensive as a product.

The present invention is provided in view of the above points, and it is possible to provide an electric water heater that is safe, has excellent operability in use, and has few failures.

[0009]

In order to solve the above-mentioned problems, the present invention comprises a container for containing a liquid, an inner lid which covers the container upper opening and faces the container side, and an outer lid which constitutes an outer shell. And a lid having a steam passage extending from the inner lid to the opening of the outer lid, and the inner lid is provided with a plurality of holes connecting the container and the steam passage. It is provided.

The plurality of valve bodies have different weights. Further, one area of the hole provided in the inner lid is such that when the liquid in the container is boiling, the vapor is discharged to the outside without increasing the internal pressure. This is the smallest area that can be released.

[0011]

The present invention provides a plurality of holes and a valve for closing the holes in the passage connecting the container and the outside of the body in the inner lid constituting the container side of the lid. For some reason, even if one of the valves closes the hole while closing the lid, the hole with the other valve is not closed, so the internal pressure in the container rises and the inside of the container rises. The hot water will not come out of the outlet.

[0012] One of the two holes should have a minimum area for suppressing an increase in internal pressure due to the generation of steam when the boiling water in the container boils. Even if the valve is held by the internal pressure, the area against the weight of the valve is small, so the valve will drop due to the weight of the valve, and the possibility that the hole will be blocked is very small. However, it does not leak out of the body.

The reason why the valve body does not fall while closing the hole is that the lid is opened and closed at a certain timing because centrifugal force acts on the valve body in the rotational movement with the shaft as a fulcrum. It is also considered that one of the reasons is that the latter is superior in the balance of the drop action due to its own weight and the force that tends to remain in the hole due to the centrifugal force. In this case, it is closer to the rotation axis with slower movement speed during rotational movement. The other valve body has a smaller centrifugal force and tends to drop, so at worst, even if the valve body blocks the hole,
The one with a large valve body weight / hole area value (the weight of the valve body per unit area of the hole when it is blocked is large) that easily falls due to its own weight rotates when the lid is opened and closed. It is located closer to the fulcrum of exercise.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 is a substantially cylindrical container for storing liquid, the outer edge of a heat transfer plate having a heating element 2 attached to the lower end thereof is liquid-tightly fixed by means such as welding. ing. Container 1
A waterproof metal fitting 3 in the form of a pipe is provided on the bottom surface of the electric power tool 5 and is connected to an electric pump 5 which is a lead-out means via a bushing 4.

The electric pump 5 serves to suck the liquid in the container 1 from the water inlet 6 connected to the bushing 4 and to discharge the liquid from the outlet 9 connected to the water pipe 8 which is one of the outlet paths 7. ing.

At the tip of the water pipe 8 is a fall-off prevention valve 1
A water pipe bushing 11 having 0 is provided, and reaches the tip portion 13 of the lead-out path via the case 12. Reference numeral 14 is a body that wraps the container 1 through a space. Reference numeral 15 denotes a spout placed on the body, which holds the body together with a hook 16 at the bottom.

Reference numeral 20 denotes a lid placed on the spout, which is supported by a hinge portion 21 serving as a fulcrum of the rotational movement. Lid 2
Reference numeral 0 denotes an outer lid 22 forming an outer shell, an inner lid 23 forming a side portion of the container, a steam passage 24 for ventilating the inside and the outside of the container 1,
An outer lid opening 22a that is connected to the steam passage 24 to guide steam to the outside of the body, a knob 25 for opening and closing, a container flange 1a.
And a packing 26 for sealing the gap between the lid 20 and the decorative frame 27 to which the packing 26 is attached.

The inner lid 23 is provided with two holes for connecting the container 1 side and the steam passage 24. One of them is the hole portion 28 having a relatively large area, and serves as a passage to the main steam passage. The other is a hole with the minimum opening area required to keep the steam pressure constant so that the water in the container 1 will not be pushed out of the body even if the water in the container 1 boils. It is part 29. And these holes 28,
Valve bodies 30a and 30b are provided corresponding to 29. These valve bodies 30a and 30b are configured such that the holes 28 and 29 are closed to prevent the liquid in the container 1 from flowing out when the body falls.

The two valve bodies 30a and 30b may have the same weight, but in this case, as described above, the holes 28 and 2 are formed.
The opening area of 9 is changed. Further, when the holes have the same area, the weights of the valve bodies are made different from each other so that one side has a margin for closing.

When the lid is opened, the lid body 20 forms an angle of about 105 ° with respect to the spout 15, and at that time, the valve 3
The holes 28 and 29 are below the holes 0a and 30b, so that the valve bodies 30a and 30b close the holes 28 and 29. Next, when the lid 20 is closed, when the angle with respect to the spout 15 becomes 90 ° or less, the valve bodies 30a and 30b normally fall due to their own weight and stop on the decorative frame 27.
8, 29 are open. However, when the closing speed of the lid body 20 is fast, centrifugal force acts on the valve bodies 30a and 30b, so that the valve bodies 30a and 30b may not fall from the holes 28 and 29 and remain closed. Here, this phenomenon is very unlikely to occur at two locations at the same time. Even if it occurs, if there is a slight deviation, the steam in the container will be exhausted by one hole and the rise in internal pressure will be prevented, The valve body also falls under its own weight and the hole is opened. Reference numeral 31 is a hot water supply knob provided in a part of the spout, and by operating this, the motor is energized to operate the electric pump 5 to draw the liquid in the container 1 out of the body. The control circuit 34 controls the energization of the motor and also controls the energization of the heating element 2 by receiving a signal from the temperature sensor 32. Reference numeral 33 is a display unit for displaying the energized state and the presence / absence of abnormality.

[0022]

According to the present invention, when the lid is closed, the inner lid constituting the container side of the lid is provided with a plurality of holes and a valve for closing the holes in the passage connecting the container and the outside of the body. However, even if one of the valves closes the hole while the lid is closed for some reason, the hole with the other valve will not be blocked, so the internal pressure in the container will rise and The hot water inside will not be discharged from the outlet.

One of the two holes should have a minimum area for suppressing an increase in internal pressure due to the generation of steam when the boiling water in the container boils. Even if the valve is temporarily held by the internal pressure, the area against the weight of the valve is small, so the valve will drop due to the weight of the valve and the possibility that the hole will be blocked is very small. The liquid inside does not flow out of the body.

[Brief description of drawings]

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

FIG. 2 is a partial cross-sectional view showing an embodiment of a lid portion of the present invention.

FIG. 3 is a longitudinal sectional view showing a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 container 20 lid 21 hinge part (fulcrum of rotational movement) 22 outer lid 22a outer lid opening 23 inner lid 24 steam passage 28 hole (large opening) 29 hole (small opening) 30a valve 30b valve body

Claims (3)

[Claims] 1. A container for containing a liquid, and an inner lid that covers the container upper opening and faces the container side and an outer lid that forms an outer shell, and a vapor passage extending from the inner lid to the opening of the outer lid. An electric water heater comprising: a lid body having a plurality of holes for connecting a container and a steam passage to the inner lid, and a valve element provided in each of the holes. 2. The electric water heater according to claim 1, wherein the valve bodies provided in the plurality of holes of the inner lid have different weights. 3. The area of one of the holes provided in the inner lid is set to a minimum area that allows vapor to escape to the outside without increasing the internal pressure when the liquid in the container is boiling. Electric water heater.