JP3136530B2 - 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 an electric water heater,
More specifically, the present invention relates to an electric water heater provided with a means for preventing hot water from flowing out when falling down.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing an external appearance of an example of a conventional electric water heater, FIG. 6 is a longitudinal sectional view thereof, and FIG. 7 is an enlarged view of a steam passage portion of FIG. In the figure, 1 is an electric water heater, 2 is its main body, 3 is a molded resin, and is a substantially cylindrical main body case in which an inner container 4 is housed. A nose cover 31 is attached to the front part, and Is provided with a water level display window 5. Reference numeral 6 denotes a body ring joined to an upper portion of the main body case 3, which has a projecting portion 7 projecting forward facing the nose cover 31, and a convex portion 8 formed at a rear portion. Reference numeral 9 denotes an operation section provided on the overhanging section 7.

[0003] Reference numeral 10 denotes a lid body incorporating an air pump 11;
Numeral 12 denotes a lid upper case, and a rear portion is provided with a convex portion 12a opposed to the convex portion 8 of the body ring 6;
A hinge portion 13 for opening and closing the lid 10 is provided in a. Reference numeral 14 denotes a mechanism for opening and closing the lid 10. Reference numeral 15 denotes a lower lid case which is connected to the upper lid case 12 by locking claws, screws, etc., 16 denotes a steam port provided in the upper lid case 12, 17
Is opened at the lower surface of the lower lid case 15, and the boiling steam in the inner container 4 is passed through a substantially L-shaped steam passage 17a.
A steam guide that leads to As shown in FIG. 7, the lower lid case 15 is provided with a fitting groove 18 on the steam port 16 side, and a fitting portion 19 hanging from the upper lid case 12 is fitted into the fitting groove 18. I have.

[0004] Reference numeral 20 denotes a ball valve provided at a vertical portion of the steam passage 17a, and reference numeral 21 denotes a pressure relief hole provided at an upper portion of the steam passage 17a. Reference numeral 22 denotes a roll-over rib projecting rearward from the projection 8 of the body ring 6, and reference numeral 23 denotes a handle rotatably mounted on the body ring 6. Reference numeral 25 denotes an operation name plate provided on the operation unit 9, which is provided with a display lamp 26, a leaf spring, a push button 26a having a built-in switch, a lock knob 27 for preventing a malfunction of the push button 26a, and the like.

[0005] Reference numeral 30 denotes a water pipe connected to the bottom of the inner container 4, one end of which is communicated with the nozzle 33 via the discharge valve 32 in the overhang 7 and the nose cover 31. are doing. In addition, water transmission pipe 3
A water level indicator 34 is provided on the back surface of the “0” so that it can be seen through the water level display window 5.

Reference numeral 35 denotes a heater provided at the bottom of the inner container 4 for boiling the water stored in the inner container 4.
It is fixed to. Reference numeral 37 denotes a temperature sensor, such as a thermistor, provided at substantially the center of the bottom of the inner container 4 for detecting the temperature of the boiling water and controlling the heat retention temperature.
8 attached. Reference numeral 39 denotes a control board, which is attached to the board cover 40 with its lower part opened, and the lower part of the main body case 3 is covered by a bottom plate.

Next, the operation of the electric kettle configured as described above will be described. First, the lid 10 is pivoted around the hinge 13.
Is opened, water is poured into the inner container 4, and the lid 10 is closed.
Next, when the power is turned on by turning on the push button 26a of the operation unit 9, the heater 35 provided below the inner container 4 generates heat,
The water in the inner container 4 is heated. At this time, the temperature detector 37 provided at the bottom of the inner container 4 detects when the hot water in the inner container 4 boils, sends a signal to the control board 39, and automatically stops energizing the heater 35. , And also controls the heat retention temperature. When using hot water, the air pump 11 is depressed to send air under pressure to the upper space of the inner container 4, and hot water is supplied from the nozzle 33. Then, when the hot water is used, the reduced hot water amount can be identified by the water level indicator provided on the water guide pipe 30 through the water level display window 5.

By the way, such an electric water heater 1 is usually placed upright on a table or the like in a state where hot water is contained. In this state, the ball valve 20 and the pressure P in the inner container 4 have a relationship of mg >> P (where mg is the weight of the ball valve 20), and as shown in FIG. Accordingly, the steam passage 17a is located below the vertical portion of the steam passage 17a, and the steam passage 17a is open.

[0009] Such an electric kettle 1 often falls down due to contact with the body or an object. Now, hinge part 1
Assuming that the rollover ribs 22 are not provided at the rear of the electric heater 3, when the electric water heater 1 rolls over as shown in FIG. 8, the vertical portion of the steam passage 17a is substantially horizontal as shown in FIG. Therefore, the relationship between the ball valve 20 and the pressure P in the inner container 4 is mgsin θ (where θ = 0) = 0 <P, and the ball valve 20 moves by the steam pressure, and the steam passage 17a
Is closed. Therefore, hot water does not flow out from the steam port 16.

Next, when the electric water heater 1 falls down with the hinge portion 13 down as shown in FIG. 10, the hinge portion 13 is covered with the projections 8 and 12a, but its curvature is small. Are not rolled over to the state shown in FIG. Therefore, as shown in FIG.
inθ> P, the ball valve 20 does not move, and the steam passage 17
Since a is not closed, hot water in the inner container 4 flows out from the steam port 16.

Therefore, as shown in FIGS. 6, 7, and 12, a rib 22 having a large curvature is projected from the convex portion 8 of the body ring 6 so that the hinge portion 13 is turned down. The balance is lost by the rollover ribs 22 and the roll is rotated as shown by the arrow in FIG. 12 so that the rollover can always be performed as shown in FIG. 8, and the ball valve 20 is moved as shown in FIG. It is closed and prevents hot water from flowing out from the steam port 16.

[0012]

As described above, the conventional electric water heater is provided with the rollover ribs 22 at the rear of the hinge portion 13 as described above.
The ribs 13 are not only obstructive, but also may be damaged by a large impact when the rollover 13 falls, and are provided at a position that is conspicuous in appearance. Had been damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and even if the electric water heater falls down, the electric water heater is easily rolled over and the steam passage is closed by a ball valve to prevent the hot water from flowing out.
Another object of the present invention is to obtain an electric water heater that does not impair the design feeling.

[0014]

SUMMARY OF THE INVENTION The present invention is directed to an electric water heater provided with a water flow preventing means for preventing water from flowing to the outside when the bicycle falls down, wherein a small rollover projection is provided below the peripheral wall of the main body and below the hinge. It is a thing. Further, the small rollover projection is provided at a position deviated from a line connecting the central portion of the main body and the central portion of the hinge portion.

[0015]

When the electric water heater falls down with the hinge portion down, the balance is lost due to the provision of the roll-over small projection, and the roll is rolled over by the weight of the overhang portion. As a result, the steam passage becomes substantially horizontal, so that the ball valve is moved by the pressure in the inner container, thereby closing the steam passage and preventing the hot water in the inner container from flowing out from the steam port. When the rollover projection is provided at a position deviated from the line connecting the center of the main body and the center of the hinge, the electric water heater can be rolled over more reliably.

[0016]

FIG. 1 is an external perspective view of a first embodiment of the present invention.
2 is a plan view and FIG. 3 is a longitudinal sectional view. FIG.
7 are assigned the same reference numerals as in the conventional example described with reference to FIGS. Reference numeral 41 denotes a bottom plate joined to a lower portion of the main body case 3, and reference numeral 42 denotes a recess provided in the main body case 3 to reinforce the main body case 3. Reference numeral 43 denotes a roll-over small projection which is provided at a lower portion of the main body case 3 and below the hinge portion 13. The rollover small protrusion 43 is formed at a height protruding from a line 44 connecting the lower end of the bottom plate 41 and the protrusion 8 of the body ring 6.
However, as shown in FIG. 2, it is desirable to shift the line from the line connecting the center of the main body 2 to the center of the hinge 13 to the left or right. Further, it may be provided on the rear surface of the bottom plate 41.

In the electric water heater 1 provided with the small overturn projections 43, as shown in FIG.
Even when the vehicle 3 falls down, the balance is lost due to the provision of the small roll-over projections 43, and the rolls are rotated by the weight of the overhang portion 7 to be in a roll-over state as shown in FIG. For this reason,
As described in FIG. 9, the ball valve 20 moves and the steam passage 1
7 a is closed, so that the hot water in the inner container 4 does not flow out from the steam port 16.

In the above description, the present invention is applied to an electric water heater provided with an air-type hot water supply means for supplying compressed air to the inner container 4 by pressurizing the air pump 11 built in the lid 10 to supply hot water. However, for example, the present invention may be applied to an electric water heater provided with an electric water heater that turns on a power supply by a switch, drives a built-in motor, and thereby supplies hot water. Can be.

[0019]

As is apparent from the above description, the electric water heater according to the present invention has the following effects.

(1) Since a small roll-over projection is provided below the peripheral wall of the electric water heater and below the hinge portion, even if the electric water heater falls down with the hinge portion down, the electric water heater rolls over and the steam port exits. The hot water can be prevented from flowing out, and since the impact upon falling down is small, there is no possibility that the small rollover projection is damaged.

(2) The small rollover projection is provided at the lower part of the peripheral wall of the main body, so that the design feeling is not spoiled.

(3) By providing the rollover small projections at a position shifted from the line connecting the center of the main body and the center of the hinge, the rollover can be securely rolled even if the projections are small.
Does not adversely affect the design.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a longitudinal sectional view of FIG.

FIG. 4 is an operation explanatory view of the embodiment of the present invention.

FIG. 5 is an external perspective view of an example of a conventional electric water heater.

FIG. 6 is a longitudinal sectional view of FIG.

FIG. 7 is an enlarged view of a steam passage portion of FIG.

FIG. 8 is a side view showing the rollover state of the electric kettle of FIG.

FIG. 9 is an enlarged cross-sectional view taken along line AA of FIG. 8;

FIG. 10 is a front view showing the electric water heater of FIG. 5 in a falling state.

11 is an enlarged sectional view of a main part of FIG.

FIG. 12 is an operation explanatory view of a conventional electric water heater having a rollover rib.

[Explanation of symbols]

1 electric kettle, 2 main body, 3 main body case, 4 inner container, 6 body ring, 7 overhang, 8, 12a
Convex part, 10 lid, 12 lid upper case, 13 hinge, 1
5 Case under lid, 16 steam port, 17a steam passage, 2
0 ball valve, 30 water pipe, 35 heater, 43 small projection for rollover.

Continuation of the front page (72) Inventor Kenzo Takahashi 1728 Komaeda, Oaza-gun, Hanazono-cho, Osato-gun, Saitama 1 Inside Mitsubishi Electric Home Equipment Co., Ltd. (56) References JP-U 3-49722 (JP, U) JP-U 7- 29942 (JP, Y2) Jikgyo 4-37584 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/21, 41/00, 41/02

Claims (2)

(57) [Claims] 1. A main body having an inner container for introducing and heating a liquid, a water pipe, and the like, a lid having a hot water supply mechanism and attached to the main body via a hinge so as to be openable and closable, An electric water heater provided with running water prevention means for preventing running water, etc., characterized in that a small rollover projection is provided at a lower portion of the main body peripheral wall and below the hinge portion. 2. The electric water heater according to claim 1, wherein the rollover small protrusion is provided at a position deviated from a line connecting a center portion of the main body and a center portion of the hinge portion.