JPS6040188Y2 - electric pot - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric kettle in which a band-shaped heater is wound and fixed near the lower end of the side circumferential surface of an inner container, and is equipped with a thermostat for controlling the temperature of hot water.

In conventional electric kettles, the thermostat is generally fixed to the bottom of the inner container.

However, according to this, the amount of water in the inner container is several tens of rIL.
If the amount is less than L, there will be almost no water inside the area surrounded by the heater, so the area other than the lower end of the inner container will be heated by the heater in the same way as in an empty state. heated.

On the other hand, since the bottom surface of the inner container is prevented from rising in temperature by the water in the inner container, the thermostat's high temperature detection is delayed, and the timing of switching the heater from the hot water boiling state to the keeping warm state is delayed.

As a result, the inner container and heater reach abnormally high temperatures, causing problems such as melting of the aluminum plate constituting the heater and easy melting of the temperature fuse.

In order to solve the above-mentioned problems of the prior art, a thermostat is also known in which a thermostat is disposed above and near the heater.

However, in this conventional example, since the thermostat is disposed above and near the heat generating part of the heater, it is strongly affected by the heat generated by the heater.

Therefore, the thermostat must be set at a high temperature in order to switch the heater from the hot water boiling state to the keeping warm state.

For example, in the conventional example mentioned at the beginning, the set temperature for maintaining the water temperature at 90°C was sufficient to be about 92°C, but in this case, it has to be set to about 96°C.

When the set temperature of the thermostat becomes high, there is a problem that the temperature difference between the set temperature and the hot water temperature becomes large, so that the hot water temperature control becomes rough and the thermostat is adversely affected such as thermal deterioration.

The present invention aims to solve all the problems of the above two conventional examples, and as illustrated in the illustrated embodiment,
In an electric kettle in which a band-shaped heater 3 is fixed in a wound state near the lower end of the side circumferential surface 2 of the inner container 1, a thermostat 5 is arranged near the upper part of the both end joining parts 4 of the heater 3, and It is characterized by being fixed on the side peripheral surface 2 of the vessel 1.

The present invention will be explained in detail below based on embodiments shown in the drawings.

The embodiment of the present invention shown in FIGS. 1 and 2 relates to an electric kettle equipped with an air pump, and the outer case 6
The stainless steel inner container 1 is accommodated in a container body 9 consisting of a bottom case 7, a lower mouth member (not shown), a discharge pipe case 8, etc., and an air pump (not shown) is installed in the container body 9. ) is pivotally attached to the lid body 10.

A band-shaped heater 3 is fixed in a wound manner near the lower end of the side circumferential surface 2 of the inner container 1 .

This heater 3 has an outer circumferential surface made of a rolled-up iron plate 11 and an inner circumferential surface made of a heat conductive plate 12 made of an aluminum plate. (not shown) is wrapped around it.

13.13.13 is a lead wire for drawing out the heater wire.

Both ends 14, 14 of the winding and tightening plate 11 are bent at 90 degrees to form screw mounting seats, and by tightening a pair of upper and lower screws 15 and 15 screwed between these, the winding and tightening plate is fixed. 11 is rolled up so that the heater 3 can be fixed at the above-mentioned location.

Further, the upper and lower edges of the heat conductive plate 12 are folded back and are integrally fixed to the winding plate 11.

The side circumferential surface 2 is located near the upper side of the both end joining portion 4 of the heater 3, which is formed between the both end portions 14 and 14 of the winding and tightening plate 11.
A thermostat 5 fixed using spot welding or the like is disposed on the top.

Reference numeral 16 is a recess formed in the flat surface for mounting the thermostat 5.

In FIG. 1, 17 is a bottom plate, 18 is a temperature fuse, 19 is a terminal, 20 is a heat insulator, 21 is a pumping pipe, 22 is a discharge pipe, 23 is a handle, and 24 is a power plug.

In the above embodiment, both the thermostat 5 and the both end matching parts 4 of the heater 3 are arranged at the rear part (first country name part) of the side circumferential surface 2, but as shown in FIG. 2
It is also possible to arrange it in the front part (the left part in FIG. 1) of the front part (left part in FIG. 1), or it is also possible to arrange it in the side part of the said side peripheral surface 2.

3 and 4, a positioning pawl 25 is integrally formed on the bottom case 7 so that the lead wire 13 of the thermostat 5 does not come into contact with the heater 3, and the lead wire 13 is engaged with the positioning pawl 25. It has stopped.

As shown in FIG. 4, the positioning pawl 25 is formed into a substantially rectangular shape, and the gap 27 between the tip 26 and the lead wire accommodating recess 28 is narrow.

Therefore, in order to move the drawer lead wire 13 from the state shown by the broken line in FIG. 4 to the state shown by the solid line in FIG. The gap 27 may be increased by bending it.

On the other hand, since the distance 27 is narrow, the drawer lead wire 13 once accommodated in the lead wire accommodation recess 28 cannot be pulled out from this position, and is securely restrained in this position. The danger of the wire 13 coming into contact with the heater 3 can be reliably prevented.

Incidentally, the positioning claw 25 can also be used to restrain other lead wires, such as lead wires for indicator lamps, in a predetermined position.

Further, as shown by the imaginary line in FIG. 4, a rib 29 is provided at the base of the positioning claw 25 to protrude downward, thereby reinforcing the base of the positioning claw 25, and at the same time, it is also used as a rotation prevention protrusion of the bottom plate 17. It is preferable to configure it so that it can be done.

Since the present invention has the above configuration, it has the following functions and effects.

■ Since the thermostat is placed near the top of the heater, even if a small amount of water is heated, the thermostat can sensitively detect the rise in temperature of the inner container, allowing the heater to remain in the drinking state. You can accurately switch from to warm mode.

Therefore, it is possible to solve the problems of the conventional example in which the thermostat is fixed to the bottom of the inner container, that is, the aluminum plate constituting the heater melts in the heated state, and the temperature fuse is easily blown out.

■ Since the thermostat is placed near the upper part of the heater's both ends, the influence of the heat generated by the heater on the thermostat is reduced compared to the conventional example where the thermostat is placed near the top of the heater's heat generating part. I can do it.

For example, in the conventional example described above, it was necessary to set the temperature of the thermostat to about 96°C to maintain the water temperature at 90°C, but in the case of the present invention, this can be set to about 93°C.

Therefore, according to the present invention, the temperature difference between the set temperature and the hot water temperature can be reduced, which is advantageous in accurately controlling the hot water temperature.

Furthermore, the degree of thermal deterioration of the thermostat is reduced, resulting in excellent durability.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of an embodiment of the present invention, Fig. 2 is a rear view of the main part thereof, Fig. 3 is a longitudinal sectional side view of the main part of another embodiment of the invention, and Fig. 4 is a side view of the main part of the embodiment of the present invention. It is a perspective view of a part. 1... Inner container, 2... Side peripheral surface, 3...
... Heater, 4 ... Both ends mating part, 5 ...
···thermostat.

Claims (1)

[Scope of utility model registration request] In an electric kettle in which a band-shaped heater is fixed in a wound manner near the lower end of the side circumferential surface of the inner container, a thermostat is arranged near the upper part of both ends of the heater, and this is placed on the side circumferential surface of the inner container. An electric kettle characterized by being fixed to.