JPH0728821B2 - Electric water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-type electric water heater that heats and heats a contained liquid.

2. Description of the Related Art In recent years, a boiling type of boiling water, which keeps the temperature once, has become the majority of demand for electric water heaters.

Conventionally, electric water heaters of this type are known, for example, as shown in FIGS. 3 and 4. Explaining with reference to the drawings, a container 2 for containing a liquid is installed inside a water heater body 1, and a heater 3 for heating and boiling the contained liquid is attached to a bottom surface of the container 2. Further, a lead-out pipe 4 for leading out the liquid contained in the container 2 to the outside is provided, and the liquid is poured out to the outside from the discharge port 5 at the tip via the lead-out pipe 4.

A lid 7 is rotatably supported by a hinge shaft 6 on one side of an upper portion of the water heater body 1 so as to be openable and closable. Then, the bellows 8 and the pressing body 9 that presses the bellows 8 are provided inside the lid 7.
And a steam passage 11 having an inflow port 10 opened at one end above the container 2 and having the other end opened at the outer surface of the lid body 7, and is interlocked with the compression operation of the bellows 8 by the pressing body 9. And a switching valve 12 for closing the steam passage 11, an open portion at the lower end of the bellows 8 is covered with a lid cover 13 covering the lower surface of the lid body 7, and an open portion at the upper portion is covered with an upper plate 14. These are welded in an airtight state. An intake port 15 is formed in the center of the upper plate 14, and a seal valve 17 having a seal packing 16 is attached to the intake port 15 so as to be able to move up and down.
The upper surface of the seal valve 17 is in contact with the pressing body 9. Furthermore, the seal valve 17 is moved upward by the first spring 18
The second spring 19 biases the upper plate 14 and the switching valve 12 upward, respectively.

More specifically, the seal valve 17 has a plurality of flexible claws 20 on 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, an inner cylindrical wall having a substantially cylindrical shape hanging down and having an inner collar 21 formed in the lower portion.
Has 22. The switching valve 12 includes a first elevating shaft 23 and a second elevating shaft 25 having a packing 24 attached thereto. The first elevating shaft 23 has an outer collar 26 at an upper portion and a hole 27 at a lower portion. The second lifting shaft 25 has a fitting hole 28, and the second lifting shaft 25 has an engaging claw 29 at the upper center.
The engaging claw 29 fits into the engaging hole 28 of the first elevating shaft 23 and is integrated to form the switching valve 12.

The operation of the above configuration will be described. First, in the case of injecting liquid, the steam passage 11 is closed by the switching valve 12 by the pressing operation of the pusher body 9 and, at the same time, the air inside the bellows 8 is compressed and the air outlet of the steam passage 11 from the pressure feed port 31 (Fig. It is pressure-fed to the inside of the container 2 through a not shown), and the liquid contained in the container 2 is injected from the discharge port 5 through the outlet pipe 4. When the liquid is not injected, for example, steam generated during boiling is not discharged through the inside of the bellows 8 but through the steam passage 11 through the steam passage 11 because 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 first elevating shaft 23 when the pusher 9 is pushed down during the pushing operation.
The upper edge of the touches and cannot be pushed further down. Therefore, when the height of the lid body 7 is lowered and it is attempted to realize compactness, the seal valve is set to the height of the first lifting shaft 23.
There was a problem that the height of 17 was simply added, and the overall height of the electric water heater was inevitably increased. In this case, φd in FIG.
The outer collar 26 of the elevating shaft 23 can be lowered by entering the inside when the push body 9 is pushed off, but the diameter of the seal packing 16 increases due to the increase of φd, so that the intake air intake The sealing portion of the mouth 15 becomes large, and the sealing performance is impaired.

Means for Solving the Problems In order to solve this problem, the present invention comprises a water heater main body containing a container and a lid body which is pivotally supported on the upper portion of the main body to open and close. Has a steam passage, one end of which opens above the container and the other end of which opens on the surface of the lid, an upper part has an intake port, and a substantially cylindrical shape that hangs below the intake port, and an inner flange at the lower part. An upper plate having an inner cylindrical wall, a lower part of which is covered with a wall cover having a pressure feed port for air, a seal valve which closes the intake port at the time of a push-down operation of the pressing body, and the opening of the pressure feed port. A switching valve including a lifting shaft that closes the inflow port and a lid packing is provided, and the seal valve is attached to the intake port by a plurality of flexible claws that are provided in the lower portion, and the lifting shaft is provided in the upper portion. Attached to the inner flange of the upper plate by a plurality of flexible claws, The first spring urges the seal valve upward and the lifting shaft downward, and the second spring urges the upper plate and the lifting shaft upward, so that the pawl of the lifting shaft when the pressing body is pushed off. The claw of the seal valve is located between the two.

With the above configuration, the claws of the seal valve are positioned between the claws of the elevating shaft when the push-off operation is performed when the pusher is pressed down. Since the addition height of can be made low, a lid with a low height can be made, and since it is not necessary to increase the diameter of the seal packing of the seal valve, the intake port can be reliably sealed, The present invention provides a compact electric water heater having a good sealing property and excellent reliability.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2. It should be noted that the same members as those of the conventional example are denoted by the same reference numerals, and only the parts different in configuration from the conventional example will be described in detail.

As shown in the drawing, a plurality of switching valves 12 formed of a packing 33 for closing the inlet 10 of the steam passage 11 and an elevating shaft 32 interlocked with a pushing operation of the pushing body 9 are formed above the elevating shaft 32. Flexible claw 34 and intake port 15 of upper plate 14 covering the upper part of bellows 8
A plurality of flexible claws 20 formed below the seal valve 17 that opens and closes the claw of the lifting shaft 32 when the push body 9 is pushed off.
The claw 20 of the seal valve 17 is positioned between 34 as shown in FIG.

The other structure is basically the same as that of the conventional example.

In the above configuration, when the push body 9 is pushed off, the pawl of the lifting shaft 32
Since the claw 20 of the seal valve 17 is located between the claws 34, the claws 20 and 34 are overlapped in the height direction when the push body 9 is pushed off, and therefore the entire amount is increased. Since the height can be reduced and the φD of the seal valve 17 in FIG. 1 does not have to be increased, the sealing property of the intake port 15 by the seal valve 17 is highly reliable, compact, and highly reliable. Is something that can be done.

EFFECTS OF THE INVENTION As is apparent from the above description of the embodiments, according to the present invention, the claw of the seal valve is arranged between the claws of the lifting shaft when the push body is pushed off. Since the height of the body can be reduced and it is not necessary to increase the diameter of the seal portion of the seal valve, the intake port can be reliably sealed, providing a compact and highly reliable electric water heater. can do.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electric water heater showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a positional relationship between a lifting shaft of the electric water heater and claws of respective seal valves, FIG. 3 is a sectional view showing the overall structure of a conventional electric water heater, and FIG. 4 is a sectional view showing the main parts of the electric water heater. 1 ... Main body, 7 ... Lid body, 8 ... Bellows, 10 ... Inflow port, 11 ... Steam passage, 12 ... Switching valve, 13 ... Lid cover,
14 ... Upper plate, 15 ... Intake port, 17 ... Seal valve, 18 ... First spring, 20 ... Pawl, 21 ... Inner collar, 22 ... Inner cylinder wall, 31 ...
… Pumping port, 32 …… Lifting shaft, 33 …… Packing, 34 …… Claw.

Claims (1)

[Claims] 1. A water heater main body containing a container, and a lid body rotatably supported on the upper portion of the body. One end of the lid body opens above the container and the other end. Is a steam passage that opens on the surface of the lid, the upper part is an upper plate having an intake port and an inner cylinder wall that has a substantially cylindrical shape that hangs below the intake port, and the lower part has an inner flange, and the lower part is a pressure feed port for air. A switching valve including a bellows covered with a lid cover, a seal valve that closes the intake port and a lifting shaft that opens the pressure feed port and closes the inlet port and a lid packing when the pusher is pressed down. The seal valve is attached to the intake port by a plurality of flexible claws provided in a lower portion, and the elevating shaft is provided in the upper plate by a plurality of flexible claws provided in an upper portion. The seal valve is attached to the collar, and the first spring causes the seal valve to move upward and the lift shaft to move downward. In addition, the upper plate and the elevating shaft are urged upward by the second spring, and the electric kettle in which the claw of the seal valve is positioned between the claws of the elevating shaft when the pressing body is pushed off. vessel.