JPH01141611A - Electric hot-water heater - Google Patents

Abstract

PURPOSE: To surely seal an air inlet by a method wherein when a pressing body is depressed to the maximum, claws of a sealing valve are constituted in a manner to be located between claws of a vertically movable shaft. CONSTITUTION: A switching valve 12 comprising a packing 33 and a vertically movable shaft 32, closes an inflow port 10 of a steam passage 11 by interlocking with a depressing control of a pressing body 9. A plurality of flexible claws 34 which are formed at an upper part of the vertically movable shaft 32 of the switching valve 12, and a plurality of flexible claws 20 which are formed at a lower part of a sealing valve 17 which opens/closes an air inlet 15 of an upper plate 14 to cover the top of a bellows 8, are constituted in such a manner that the claws 20 of the sealing valve 17 may be located between the claws 34 of the vertically movable shaft 32 when the pressing body 9 is depressed to the maximum. By this method, the summed up height of the vertically movable shaft 32 and the sealing valve 17, which greatly contributes to the total height of a lid body 7, can be reduced, and for this reason, the lid body 8 with a lower height can be made. Also, making the diameter of the seal packing 33 of the sealing valve 17 larger is not required, and the air outlet 15 can be surely sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air-type electric water heater for heating and keeping a stored liquid warm.

BACKGROUND OF THE INVENTION In recent years, the majority of electric water heaters have come to be of the boiling type, which heats water and then keeps it warm.

Conventionally, this type of electric water heater is known, for example, as shown in FIGS. 3 and 4.

To explain based on the figure, a container 2 containing liquid is installed inside the water heater main body 1, and on the bottom of this container 2,
A heater 3 is installed to heat and boil the liquid contained in the container 2, and a discharge pipe 4 is provided to lead the liquid contained in the container 2 to the outside. It is adapted to be poured out from a discharge port 6.

A lid 7 is pivotally supported on one side of the upper part of the water heater body 1 by a hinge shaft 6 so as to be openable and closable. Inside the lid 7, there is a bellows 8, a pusher 9 that presses the bellows 8, and an inlet 1o that opens above the container 2 at one end.
and a steam passage 11 whose other end is open to the outer surface of the lid body 7, and in conjunction with the compression operation of the bellows 8 by the pusher body 9,
A switching valve 12 that closes the steam passage 11 is disposed, an open portion at the lower end of the bellows 8 is covered with a lid cover 13 that covers the lower surface of the lid body 7, and an open portion at the upper end is covered with an upper plate 14,
These are each hermetically welded. Further, an intake port 15 is formed in the center of the upper plate 14, and a seal valve 17 with a seal packing 16 attached to the intake port 15.
is mounted so as to be able to rise and fall freely, and the upper surface of this seal valve 17 is in contact with the pusher body 9. Further, a first spring 18 causes the seal valve 17 to move upward and the switching valve 12 to move downward, and a second spring 19 causes the upper plate 14 and the switching valve 12 to move downward.
Each is doubly energized.

More specifically, the seal valve 17 has a plurality of flexible claws 20 at its lower part, and is attached to the intake port 15 from above by the claws 20.

Below the intake port 15 of the upper plate 14, there is a substantially cylindrical inner cylinder wall 22 which hangs down and has an inner flange 21 formed at its lower part. The switching valve 12 consists of a first lifting shaft 23 and a second lifting shaft 25 equipped with a packing 24, and
3 has an outer flange 26 at the upper part, a hole 2a and an engaging hole 28 at the lower part, and the second elevating shaft 26 has a post 3o with an engaging claw 29 formed at the upper center thereof. This engaging pawl 29 fits into the retaining hole 28 of the first lifting shaft 23, and together form the switching valve 12.

The operation of the above configuration will be explained. First, when injecting liquid, the steam passage 11 is closed by the switching valve 12 by the pressing operation of the pusher 9, and at the same time, the air inside the bellows 8 is compressed, and the air from the pressure feed port 31 to the air port of the steam passage 11 (see Fig. (not shown) into the interior of the container 2.
The stored liquid is injected from the discharge port 5 through the outlet pipe 4. In addition, when the liquid is not injected, for example, steam generated during boiling does not pass through the inside of the bellows 8, but is discharged to the outside through the steam passage 11 from the inlet 1Q, since the pressure feed port 21 is closed by the switching valve 12. was common.

Problems to be Solved by the Invention In such a conventional electric water heater, the lower end of the seal valve 17 and the upper end of the first lifting shaft 23 come into contact with each other when the pushing body 9 is pushed up. , I can't push it any further. Therefore, if an attempt is made to reduce the height of the lid body 7 and make it more compact, the height of the seal valve 17 will simply be added to the height of the first lifting shaft 23, and this will inevitably result in an electric water boiler. There was a problem in that the overall height of the vessel became high. In this case, it can be made lower by increasing φ(X?: in FIG. 4) so that the outer flange 26 of the first elevating shaft 23 enters inside when the pushing body 9 is pressed.
As φd becomes larger, the diameter of the safety packing 16 becomes larger, and the sealing portion of the intake port 16 becomes larger, impairing the sealing performance.

Means for Solving the Problems In order to solve this problem, the present invention consists of a water heater main body with a built-in container, and a lid body pivotally supported on the upper part of this body so as to be freely openable and closable. The steam passage has one end opening above the container and the other end opening at the surface of the lid body, and the upper part has an intake port and a substantially cylindrical shape that hangs below the intake port and has an inner flange at the bottom. An upper plate having an inner cylindrical wall, the lower part of which is a bellows covered with a lid cover having an air pressure feed port, a seal valve that closes the intake port when the pushing body is pressed down, and a seal valve that opens the pressure feed port and opens the pressure feed port. The switching valve includes a lift shaft that closes the inlet and a lid gasket, the seal valve is attached to the intake port by a plurality of flexible claws on the lower part, and the lift shaft has a switch valve on the upper part. It is attached to the inner flange of the upper plate by a plurality of flexible claws, and a first spring causes the seal valve to move upward and the lifting shaft to move downward, and a second spring causes the upper plate and the seal valve to move downward. The elevating shaft is urged upward, and the pawl of the seal valve is positioned between the pawls of the elevating shaft when the pushing body is pushed out.

Effect With the above configuration, the claw of the seal valve is positioned between the claws of the lifting shaft when the pushing body is pressed down, so that the claws of the seal valve are positioned between the claws of the lifting shaft and the seal valve, which greatly contribute to the overall height of the lid body. Since the additional height can be lowered, it is possible to create a lid with a lower height, and since there is no need to increase the diameter of the seal gasket of the seal valve, the intake port can be reliably sealed. To provide an electric water heater that is compact, has good sealing properties, and has excellent reliability.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. Note that the same members as in the conventional example are indicated by the same reference numerals, and only the parts that differ from the conventional example in structure will be described in detail.

As shown in the figure, the inlet 10f of the steam passage 11 is closed in conjunction with the push-down operation of the pusher 9: the gasket 33 and the lifting shaft 3
A plurality of flexible pawls 34 formed above the lifting shaft 32 of the switching valve 12 consisting of The plurality of flexible claws 20 are arranged so that the claws 20 of the seal valve 17 are positioned between the claws 34 of the elevating shaft 32 as shown in FIG. It is configured.

The other configurations are basically the same as the conventional example.

In the above structure, when the pushing body 9 is pushed out, the claw 2o of the seal valve 1 is positioned between the claws 34 of the lifting shaft 32. 20
and 34 overlap in the height direction, the height of the food body can be lowered accordingly, and the seal valve 1γ shown in FIG.
Since there is no need to increase φD, the sealing performance of the intake port 16 by the seal valve 17 is highly reliable, and the system is compact and highly reliable.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, when the pushing body is pushed off, the claw of the seal valve is positioned between the claws of the lifting shaft. The body height can be lowered, and there is no need to increase the diameter of the sealing part of the seal valve, so the intake port can be reliably sealed, providing a compact and highly reliable electric water heater. can do.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts of an electric water heater showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the positional relationship between the lifting shaft and the claws of the seal valves of the same electric water heater. FIG. 3 is a cross-sectional view showing the overall configuration of a conventional electric water heater, and FIG. 4 is a cross-sectional view of essential parts of the electric water heater. 1...Body, T...Lid, 8...
...Bellows, 10...Inflow port, 11...
...Steam passage, 12...Switching valve, 13...
...Lid cover, 14...Top plate, 15...
・Intake port, 17...Seal valve, 18...
・First spring, 2o...Claw, 21...
Inner flange, 22... Inner cylinder wall, 31... Pressure feed port, 32... Lifting shaft, 33... Packing, 34... nail. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
figure

Claims (1)

[Claims] It consists of a water heater body with a built-in container and a lid that is pivotally supported on the top of the body so that it can be opened and closed. The upper plate has an air intake port and a cylindrical wall with an inner flange at the lower part, and the lower part is covered with a lid cover that has an air inlet. a seal valve that closes the intake port when the pushing body is pressed down, and a switching valve that includes a lifting shaft and a lid packing that opens the pressure feeding port and closes the inflow port,
The seal valve is attached to the intake port by a plurality of flexible claws provided at the lower part, and the elevating shaft is attached to the inner flange of the upper plate by a plurality of flexible claws provided at the upper part. A first spring urges the seal valve upward and the lifting shaft downward, and a second spring urges the upper plate and the lifting shaft upward. An electric water heater in which the claw of the seal valve is positioned between the claws of the seal valve.