JP3196741B2 - 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 having a lock detecting device for a lid capable of pouring a heated and heated liquid stored in an external container.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional hot water supply device having a pot, an electric water heater, and the like is configured such that a liquid 108 contained in a container 101 is supplied from a pipe 104 by a pressing operation of a pump 103 provided on a lid 102. Get out and go out 10
5 through the discharge port 106 connected to the tip 105a.

At this time, the deriving means has the same configuration as that of the liquid pump type in addition to the air type. Tip 10 of the derivation route
A fixed gap 107 for taking in air was provided between 5a and the discharge port connected thereto.

[0004] When the electric power is supplied from the water, the main heating element is energized. When it reached a boiling state, it was detected by a sensor and the power supply to the main heating element was cut off. In recent years, it has been required to boil for a long time in order to remove chlorine for sterilization from a desire for healthy and delicious water, and such a function is also required for an electric water heater.

[0005] As shown in FIG. 5, a lid 113 provided on the spout 111 and closing the opening of the container 112 is pivotally supported by a hinge 114 of the spout and can be opened and closed by operating a lock knob 115. Is configured. The lock knob is attached to the lid by being urged by a spring 116,
When the lid is closed, the hook 118 of the lock knob is hooked on the engaging portion 117 of the spout, so that the lid cannot be easily opened without operating the lock knob.

[0006]

However, such a conventional configuration has the following problems.

That is, there is no problem if the locking claw 118 on the lid is securely engaged with the engagement portion 117 of the spout, but the operator does not perform the operation of closing the lid securely, or the accuracy of the finished parts is poor. Therefore, the lock claw 118 does not reliably reach the engagement portion 117 of the spout even when operated, and if the water heater is knocked down, the lid is easily opened and the hot water in the container starts to flow. Scattered and the danger of burns was great.

An object of the present invention is to provide an electric water heater that is low in cost, has good performance, and is excellent in safety without the risk of hot water flowing out.

[0009]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a spout mounted on a body, a lid covering a container opening on the spout, and the lid. A lock claw that slides in the horizontal direction, a claw engagement portion provided in the spout, the claw engagement portion engaging with the lock claw, and a contact sensor provided in the claw engagement portion and detecting contact of the lock claw. have a,
Heat is generated only when the lock claw contacts the contact sensor
An electric water heater that can supply electricity to the body .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a container for containing a liquid, a heating element for heating the liquid in the container, a control unit for controlling the heating element, a body for covering the container, and a body for covering the container. A spout placed on the top, a lid covering the container opening on the spout, a horizontally-sliding lock claw provided on the lid, and the lock claw provided in the spout. possess a claw engagement portion for engaging, and a contact sensor provided in the claw engagement portion for detecting the abutment of the locking pawl, the locking pawl
Only passes through the heating element when it contacts the contact sensor.
An electric water heater that can supply electricity.

According to the present invention, power can be supplied to the heating element only when the lid is securely closed and the lock claw can be securely set in the engagement portion of the spout. Therefore, even if the water heater falls down and the lid is opened and the liquid in the container flows out, the water is not supplied and there is no danger of burns. In addition, even if the lid is closed, if the engagement of the lock claw with the spout is incomplete, the heating element is not energized, so that the operator is notified of the closed state of the lid.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the outer edge of a heat transfer plate 3 on which a heating element 2 is mounted is liquid-tightly welded to the lower end of a cylindrical body of a substantially cylindrical liquid container 1 by means such as welding. It is stuck.

A pipe-shaped waterproof fitting 4 is provided on the bottom surface of the container 1, and is connected to a water pipe 6, which is one of the water guide paths, through an electric pump 18, which is a lead-out means, via a pushing 5.

At the end of the water pipe 6, a fall-off prevention valve 7 is provided.
A water tube pushing 8 having a
Through, the leading end 10 of the lead-out path (hereinafter abbreviated as the leading end)
Leads to. The tip 10 is divided into two passages as shown in FIG. One forms a part of a lead-out path which is a path for the liquid in the container to go out of the body, and the other path is an air intake path 1 having an air intake port 11 outside the body.
It is 2. In FIG. 2, the tip of the intake port 11 and the tip of the lead-out path are stepped, but may be on the same surface.

The lead-out path is made of a resin such as polypropylene and has excellent hot water resistance and is not violated by hot water.
The leading end of the lead-out path is set and fixed to the cover 13.

Now, when the liquid in the container is drawn out by operating the drawing-out means (here, the electric pump), the liquid reaches the distal end portion 10 of the drawing-out path through the water pipe 6, the water pipe pushing 8, and the case 9. . At this time, air enters from the air intake passage to prevent the siphon phenomenon, and also prevents the discharge hot water from overflowing and lowering the insulation of electric circuits and electric components.

Reference numeral 15 denotes a body that wraps the container 1 through a space. A part of the body 15 has a water level display window (not shown) so that the liquid level in the container 1 can be visually checked from outside the body.

Reference numeral 16 denotes a spout to be placed on the body, which pinches the body together with a lower hook 17.

Reference numeral 20 denotes a lid placed on the spout, and a hinge 2
It is supported at 1. Inside the lid 20 is a steam passage 22. The steam generated in the container passes through the steam passage 22 and out of the body through a steam port 23 in the lid 20. When the main heating element 25 is energized by some operation and the water in the container boils, the sensor 24 senses it and turns off the energization after a while. The dew that has formed in the steam passage 22 due to the condensation of the steam generated at this time flows back through the passage and returns to the inside of the container.
After a while, energization is started to reach a boiling state.
After repeating such a state several times, as shown in FIG.
The power supply to the main heating element is stopped to complete the water heating. The horizontal axis in FIG. 3 is a time axis of an arbitrary unit. Thereafter, the temperature is maintained by the auxiliary heating element 26 to maintain the hot water state. Such an operation is performed by the control unit 27.

Reference numeral 31 denotes a lock knob, which is used for rotating operation (arrow).
The cover 20 is opened and closed by sliding the lock claw 32 urged by a spring. When closed, the lock claw 32 is set to the claw engagement portion 33 of the spout. Once set, it cannot be moved easily unless the lock knob is operated because it is urged toward the spout by a spring. The claw engaging portion 33 is provided with a contact sensor 34, and when the lid is properly closed and the lock claw 32 hits the contact sensor 34, a signal is started to be sent to the control portion 27, and the heating element can be energized. . If not set correctly, the sensor will not sense and will not energize.

[0022]

As is apparent from the above description of the embodiment, according to the structure of the present invention, the lid is not set correctly, and the lock claw is not set in the claw engaging portion of the spout. Since the heating element cannot be energized, the water heater will fall over, and if the lid is opened and the liquid inside flows out, it will be in a water state, and the boiling water will not flow out. There is no risk of burns.

As described above, according to the present invention, an electric water heater excellent in safety can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electric water heater according to one embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the electric water heater.

FIG. 3 is a diagram showing a relationship between a current-carrying state of the electric water heater and a hot water temperature.

FIG. 4 is a sectional view of a conventional air-type electric water heater.

FIG. 5 is a sectional view of a main part of a conventional pump-type electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Heating element 15 Body 16 Spout 20 Lid 27 Control part 32 Locking claw 33 Claw engaging part 34 Contact sensor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47J 27/21 101

Claims (1)

(57) [Claims] A container for storing the liquid, a heating element for heating the liquid in the container, a control unit for controlling the heating element, a body for covering the container, and a body mounted on the body. A spout, a lid covering the container opening above the spout, a lock claw provided on the lid and sliding in a horizontal direction , and a claw engaging portion provided in the spout and engaged with the lock claw If, possess a contact sensor provided in the claw engagement portion for detecting the abutment of the locking pawl, the locking pawl is the contact sensor
An electric water heater capable of supplying electricity to the heating element only when the heating element is in contact with the heating element .