JPS5946603B2 - electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric water heater equipped with a device for pumping air into an inner container and dispensing liquid in the inner container.

Conventionally, this type of electric water heater has a heater 2 installed at the bottom of an inner container 1, and a temperature regulator that controls the energization of the heater 2 and adjusts the liquid 3 in the inner container 1 to a predetermined temperature, as shown in FIG. 4, a bellows 6 is housed in a lid body 5 above the inner container 1, and an air hole 7 connected to a lower part of the bellows 6 and communicating with the inner container 1 is provided. A lid 8 is provided, and the bellows 6 is compressed by pressing a pusher provided at the upper center portion of the lid body 5, and air is forced into the inner container 1, and the air pressure causes the heater 2 and the temperature regulator 4 to The liquid 3 heated to a predetermined temperature is poured out from a discharge port 10 through a rising pipe 9.

Incidentally, the inner lid 8 has a backing 12 on the flange portion 11 around it to prevent air leakage when the liquid 3 is poured out, and is also integrally molded with synthetic resin to prevent burns during attachment/detachment operations. There is.

Therefore, if the inner lid 8 is left with the liquid 3 in the container 1 empty, it will be abnormally heated and deformed by the heater 2 through the air inside the sealed inner container 1, and the backing 12 will be deformed. This may make it impossible to reliably prevent air leakage, and the liquid 3 may not be able to be poured out in subsequent use.Also, if the temperature regulator 4 malfunctions and short-circuits, the heater 2
The current is applied continuously, and there is a risk that the inner lid 8 will melt and fall inside the inner container 1 and cause a fire.The bellows 6 and the lid body 5 will also be deformed, making it impossible to reuse them. Furthermore, when the inner lid 8 is attached or removed, the heated steam inside the container blows out from the container hole 7, posing a risk of burns.

The present invention improves the above-mentioned conventional drawbacks and provides a highly safe electric water heater.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

□ In Figures 2 to 4, 21 is a cylindrical container with a bottom made of a stainless steel plate, etc., and a band-shaped container is housed in an insulator such as mica and seamed with an aluminum plate or the like around the bottom of the container. heater 2
2 and the inner container '2 by controlling the energization of the heater 22.
Temperature regulator 24 that adjusts the liquid 23 in 1 to a predetermined temperature
It is equipped with

The inner container 21 is engaged with a spout 27 through a spout backing 26 by a flange 25 extending in the outer circumferential direction at the upper end thereof, and the spout 27 is provided at the upper end of a pod 28 surrounding the inner container 21.

Reference numeral 29 denotes a lid main body which is pivotally supported by the spout 27 and provided so as to be freely openable and closable.A pusher body 30 is provided in the opening at the center of the upper part of the lid body, and a bellows 31 is housed below this pusher body 30. .

Note that 32 is a knob for the lock lever 32a, and the knob for the spout 2
7 and locks the lid body 29 when it is closed.

33 is an inner lid formed of synthetic resin, and a bellows 31
It is connected to the bellows 31 by a lid backing 34 provided at the lower part of the air hole 35, 35' that communicates with the inner container 21, and the liquid 2s pressurized by the air forced into the inner container 21.
'bs A rising water pipe 36 formed of a stainless steel plate or the like, and a discharge pipe 3 connected to this water rising pipe 36.
7, the overflow prevention valve 38 between the rising pipe 36 and the discharge pipe 37, and the back surface of the inner lid 33 are covered to cover the air chamber 33.
a cover 39 formed of a metal plate such as a stainless steel plate with a flange portion 39a extending from a central substantially inverted conical portion to the outer periphery so as to form a shape b; and a flange portion 39a of the cover 39.
On the outer periphery, the outer periphery of the inner lid 33 and the flange portion 39 of the cover 39 are provided.
An inner lid backing 40 that seals the outer periphery of the inner container 21 and the upper end opening of the inner container 21 with the inner lid 33 is tightened with screws 39b.

Note that 41 is a liquid volume gauge that displays the amount of liquid 23 in the inner container 21, and 42 is a back plate.

The cover 39 is also provided with an air supply hole 43 near the outer periphery and a dew drain hole 44 in the center.

In the above configuration, when the liquid 23 in the inner container 21 is empty, the inner container 21 and the air inside it are heated by the heater 22, but the inner lid 33 has its back surface covered with a metal cover 39. This prevents thermal deformation.

As a result, the sealing of the container 21 by the inner lid backing 40 is not hindered (the initial performance can be maintained).

In addition, when the temperature regulator 24 is short-circuited, the inner container 21 and the air inside it are heated even more than during dry firing, but the water rising pipe 36 of the inner lid 33 is heated, and the upper portion where it is attached falls and flows out. If the lower resin part of the prevention valve part 38 melts, the rising pipe 36 will simply fall off, and there is no risk of the inner lid 33 melting and causing a fire.

Furthermore, when the inner lid 33 is attached or removed, the heated steam inside the inner container 21 flows through the air supply hole 43 into the air chamber 33b surrounded by the inner lid 33 and the cover 39, and then through the air hole 35'. The air hole 35 is formed by bending through the air hole 35.

Therefore, as the temperature of the heated steam decreases in the air chamber 33b, its flow rate also decreases, and therefore air flows out from the air hole 35 at a relatively low temperature and slowly, and the knob portion 33a
It has the effect of preventing hand burns and making your hands feel less hot.

Furthermore, if the water boils accidentally and falls over, the lock lever 32 of the lid body 29 and the hook 27a of the spout 27 should not come off, causing the hot water to flow out. The entire acceleration generated by the movement presses the back surface of the inner lid, and the locking mechanism when the lid body is closed becomes very strong.Therefore, the operation when opening the lid body is somewhat troublesome.However, in this embodiment, the inner lid 33 is Since the cover 39 is formed into a substantially inverted conical shape, the inner container 2
The pressure that presses the inner lid 33 due to the movement of the liquid 23 in the lid 33 is divided by the tapered portion of the cover 39 and is reduced, so that the locking mechanism of the lid body 29 can be simplified.

Furthermore, in the past, the inner lid 8 was made of synthetic resin, and the odor peculiar to the resin was contained in the liquid 3, resulting in a liquid with a strange odor being poured out.However, in this embodiment, as described above, the inner lid 33 is insulated by the cover 39 and the odor peculiar to the resin is contained in the liquid 3. At the same time, it is possible to counteract resin odor without heating.

As is clear from the above explanation, according to the present invention, safety is improved during dry baking without liquid, which is likely to occur in normal use, and during continuous energization due to failure of the temperature controller, as well as safety in case of overturning of the container. It is of great value as it simultaneously provides safety and measures against resin odor.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional electric water heater, Fig. 2 is a sectional view of an electric water heater showing an embodiment of the present invention, Fig. 3 is a sectional view of its essential parts, and Fig. 4 is an exploded view of its essential parts. FIG. 21... Container 1.22... Heater,
24...Four temperature regulators, 31...Bellows, 3
3... Inner lid, 39... Cover.

Claims (1)

[Claims] 1. A bottomed cylindrical container equipped with a heater at the bottom and a temperature regulator that controls the energization of the heater, a pump device that pumps air into the container and discharges the liquid stored in the container, and The lid of the container is equipped with an air hole that communicates with the inside of the container with the pump device, a metal cover that covers the bottom surface of the lid to form an air chamber, and the outer periphery of the flange of this cover has a connection between the outer periphery of the lid and the container. An electric water heater equipped with a backing that seals the top end.