JPS6329461Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention heats water placed in a bottomed cylindrical container.
The present invention relates to a heat retention type electric water heater that then maintains the temperature at a constant temperature.

Conventional structure and problems thereof Conventionally, as shown in FIG. 5, this type of electric water heater has a main heating element (not shown) and an auxiliary heating element ( (not shown) is wrapped around the heating element 24, the main temperature controller 25 is attached to the upper part of the heating element 24, the main heating element and the main temperature controller 25 are connected in series, and the auxiliary temperature controller 25 is connected in parallel with this. The heating element was connected in series with an auxiliary temperature regulator 26 pressed by a spring 27 at the bottom of the container 23. In this conventional electric water heater, when heating the main temperature regulator 25, the main temperature regulator 25 is attached to the upper part of the heating element 24.
Due to the influence of the radiant heat from No. 4 and the reflected heat from the body 28, which constitutes the outer shell, the main temperature regulator was activated before the water temperature reached the predetermined temperature, making it difficult to obtain a stable water boiling temperature. . Also, if you want to obtain a hot water temperature of 90°C in the container 23 due to the structure, the main temperature controller 25
The operating temperature of the unit is higher than the water temperature (e.g.
Since it was necessary to set the temperature correlation to OFF operating temperature (95°C), it did not adequately respond to voltage and atmosphere fluctuations and could not be considered a desirable temperature sensing configuration.

On the other hand, as shown in FIG. 6, a heating element 30 is wrapped around the lower outer circumference of the bottomed cylindrical container 29,
1 on the outer peripheral side of the container 29 above the heating element 30, and the main temperature controller section 31 is cut out to form the container 2.
There is an electric water heater constructed of a heat insulating material 32 wrapped around the outer circumferential surface of the water heater 9, but in this case, the phenomenon opposite to that described in the conventional example (water temperature 95°C - main temperature controller unit temperature) can be seen. OFF operating temperature: 90°C), which could not be said to be desirable in any case.

Purpose of the invention The present invention aims to provide an electric water heater that can control the heating temperature and insulation temperature of water in a container, and can also control the boiling water at a more stable temperature during heating.

Structure of the invention In the present invention, a heating element is wrapped around the outer periphery of a cylindrical container with a bottom, a main temperature regulator is disposed on the outer peripheral side of the container near the heating element, and the main temperature regulator and the heating element are integrated. The intended purpose is achieved by wrapping a heat insulating material having a notch that exposes the outer periphery of the container and the heating element.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is the main body of the water heater, 2 is its base, 3 is the body mounted on the base 2, and 4 is the spout mounted on the body 3, which has a bottom at its inner step. It supports the container 5 on the cylinder.

6 is an inner lid unit, 7 is an upper lid unit, and a pouring mechanism that presses a presser plate 8 to pump air with an internal bellows pump and discharges water or hot water stored in the container 5 from a discharge port 9. It is.

Reference numeral 10 denotes a band-shaped heating element that includes a main heating element (not shown) and an auxiliary heating element (not shown) and is wrapped around the outer periphery of the lower part of the container 5.

11 is a main temperature controller fixed to the container 5.
The heating element 10 is attached to the outer circumferential side surface of the container 5 near the boundary of the heating element 10 by pressing the mounting plate 12 and the first pressing spring 13 . 16 is a main temperature controller 11;
A heat insulating material having a notch 15 that exposes a part of the heating element 10 is wrapped around the outer periphery of the container 5 and the heating element 10. 17 is the heat insulating material 16 in the container 5
It is a band that is fixed to the

A second mounting plate 18 is fixed to the bottom of the container 5, and a third mounting plate 19 is screwed thereto. Reference numeral 20 denotes an auxiliary temperature regulator, which has a temperature fuse 21 superposed below and a second pressing spring 22 screwed onto the third mounting plate 19.
is pressed against the bottom surface of the container 5 by. The OFF operating temperature of the main temperature controller 11 is set by the auxiliary temperature controller 20.
The ON operating temperature is approximately 90 to 96 degrees Celsius, which is approximately equal to the RFF operating temperature of the main temperature controller 11.
℃, and the auxiliary temperature controller 20 is set to 85 to 92℃. As shown in FIG. 4, the electric circuit configuration is such that the main heating element 10a and the main temperature controller 11 are connected in series, the auxiliary heating element 10b and the auxiliary temperature controller 20 are connected in series, and these are connected in parallel. This parallel connection is connected to the power supply 22 via the temperature fuse 21.
It is connected to the.

Next, the operation of the above configuration will be explained.

When water is poured into the container 5 and electricity is applied, the water is heated by the main heating element 10a and the auxiliary heating element 10b of the heating element 10. When the temperature of the hot water (water) reaches a predetermined temperature, the main temperature regulator 11 is turned OFF and boiling of water is completed. Next, the main temperature controller 1 is connected in series with the auxiliary heating element 10b of low electric capacity (100V-50W).
The energization is controlled by an auxiliary temperature controller 20 set to an ON operating temperature higher than the ON temperature of 1, and the heat retention temperature is controlled to be constant.

In this case, as explained in the above configuration, the heating element 10 containing the main heating element 10a and the auxiliary heating element 10b is wrapped around the outer circumference of the lower part of the container 5, and the main temperature regulator 11 is placed at the boundary between the heating elements 10. A heat insulating material 16 is attached to the outer peripheral side surface of the container 5 in the vicinity, and has a main temperature controller 11 and a cutout portion 15 that exposes a part of the heating element 10. Since the main temperature controller 11 is wrapped around the
It does not receive the radiant heat from the heating element 10 and the reflected heat from the body 3, but receives the heat conduction from the container 5 by the hot water heated by the heating element 10 and the radiant heat from the curved part of the heating element 10. Since the temperature is only exposed to the water, a sensitive temperature that is almost the same as the temperature rise of the hot water (water) can be obtained, so a stable heating temperature (predetermined boiling temperature) can be obtained.

Effects of the device As is clear from the above explanation, according to the present invention, even when the electric capacity during heating is changed, the heating temperature characteristics described above can be obtained by changing the area of the notch in the insulation material. In addition, when the material of the container is a material with poor thermal conductivity, such as stainless steel, by replenishing it with radiant heat from the curved part of the heating element, the temperature characteristics of boiling water during heating can be improved.
without being greatly affected by changes in voltage or room temperature.
It is designed to provide a stable predetermined heating temperature, and its practical value is great. Furthermore, if you mistakenly turn on the power without adding water, the main temperature regulator will receive a lot of radiant heat from the heating element, which will cause it to operate in a short time and prevent the temperature from rising too high.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an electric water heater showing an embodiment of the present invention, Fig. 2 is a partially cutaway sectional view of the electric water heater, Fig. 3 is a sectional view of the essential parts, and Fig. 4. 5 is a partially cutaway sectional view of a conventional electric water heater, and FIG. 6 is a partially cutaway sectional view of another conventional electric water heater. 3...Body, 5...Container, 10...Heating element,
11... Main temperature controller, 15... Notch, 16...
...Heat insulation material.

Claims (1)

[Scope of utility model registration request] A heating element containing a main heating element and an auxiliary heating element is wrapped around the outer periphery of a cylindrical container with a bottom, and a main temperature regulator that controls the supply of electricity to the heating element is installed in the container near the heating element. An electric water heater comprising: a heat insulating material disposed on an outer circumferential side surface and having a notch part exposing the main temperature regulator and a part of the heat generating element, and wrapped around the outer periphery of the container and the heat generating element.