JPS6231059Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Purpose of the invention) This invention relates to an electric kettle that can obtain boiling water by continuing heating for a predetermined time by controlling a timer after the water temperature reaches 90 degrees. .

The object of the present invention is to provide an electric kettle that can accurately control the timer and optimize the heating time after the water temperature reaches 90 degrees.

(Structure of the invention) In order to achieve the above object, the present invention, as illustrated in the illustrated embodiment, includes a bimetal switch 1 that turns off when the temperature inside the timer exceeds a predetermined temperature, and an internal switch that raises the temperature inside the timer. When the water temperature reaches a predetermined temperature or higher, the internal heater 2 is energized, while the main heater 4 is de-energized by turning off the bimetal switch 1. The bimetal timer 3 is connected to the main circuit 5 in such a manner that the electric pot is connected to the main circuit 5, and the bimetal timer 3 is disposed at a position where it is easily affected by the heat of the main heater 4, thereby forming an electric pot.

(Embodiment) The embodiment of the present invention shown in FIGS. 1 and 2 relates to an electric pot equipped with an air pump. Inside the container body 9, which is composed of an outer case 6, a bottom case 7, a lower mouth member (not shown), a discharge pipe case 8, etc., an inner container 10 made of stainless steel is housed, and the container body 9 is filled with air. A lid body 11 provided with a pump unit 12 is pivotally attached. By pushing the air pump unit 12, the water in the inner container 10 can be sucked up from the pumping pipe 13 and discharged from the discharge pipe 14.

A main heater 4 for heating the water in the inner container 10 is wound around the lower side circumferential surface of the inner container 10 . In addition, a heat insulating material 15 made of glass wool or the like is arranged on the outer side circumferential surface of the inner container 10.
It keeps the water (hot water) inside warm.

The bottom and lower side peripheral surface of the inner container 10 are surrounded by a metal heater cover 16. This heater cover 16 is affected by the heat of the main heater 4, and when heated, the temperature rises to a considerable level. The outer side peripheral surface of the heater cover 16 is surrounded by the heat insulating material 15.

As shown in FIG. 2, the bimetal timer 3 includes a bimetal switch 1 that turns off when the temperature inside the timer exceeds a predetermined temperature, and an internal heater 2 that raises the temperature inside the timer. As shown in FIG. 2, the bimetal switch 1 is connected in series to the main heater 4, and the internal heater 2 is arranged in parallel to the main heater 4 and the bimetal switch 1. Further, the internal heater 2 is connected in series to a thermostat 17 that controls the on/off of energization.

The thermostat 17 is arranged so as to be in contact with the bottom surface of the inner container 10, and is configured to be turned on when the temperature of the water reaches a predetermined temperature or higher, and the internal heater 2 is energized.

As mentioned above, the bimetal timer 3 is connected to the main circuit 5 including the main heater 4 and the thermostat 17, so that when the water temperature reaches a predetermined temperature or higher, the internal heater 2 is energized. On the other hand, when the bimetal switch 1 is turned off, the power supply to the main heater 4 is cut off.

As shown in FIG. 1, the bimetal timer 3 has screws 1 on the outer peripheral surface of the heater cover 16.
8 and 18, and the outer surface of the bimetal timer 3 is covered with the heat insulating material 15.
Therefore, the inside of the bimetal timer 3 reaches a high temperature due to the thermal influence of the heater cover 16, which is heated by the main heater 4 during heating. On the other hand, since the outer surface of the bimetal timer 3 is covered with the heat insulating material 15, it is hardly affected by the outside temperature.

In this embodiment, as described above, the bimetal timer 3 is disposed on the outer peripheral surface of the heater cover 16, which is susceptible to the thermal influence of the main heater 4.

Next, the operation of the present invention will be explained based on the above embodiment.

When the water in the inner container 10 is heated by the main heater 4 and reaches a predetermined temperature (for example, 92° C.), this is detected, the thermostat 17 is turned on, and the internal heater 2 is energized. . At this time, the inside of the bimetal timer 3 is already in a considerably high temperature state due to the thermal influence of the main heater 4 via the heater cover 16, and the temperature is approximately constant regardless of the outside temperature. When the internal heater 2 is energized, the temperature inside the bimetal timer 3 further increases due to this influence. When the internal temperature reaches a predetermined temperature or higher, the bimetal switch 1 is turned off, power to the main heater 4 is cut off, and heating for boiling water is completed.

After the water in the inner container 10 reaches a predetermined temperature (for example, 92°C), boiling water is obtained by continuing heating by the main heater 4 under the control of the bimetal timer 3. The set time of the timer 3 corresponds to the time from when the internal heater 2 starts to be energized until the internal temperature of the bimetal timer 3 reaches a predetermined temperature. In order to accurately set this set time to a desired time, it is necessary that the internal temperature at the time when the internal heater 2 starts to be energized is a constant temperature. As described above, the present invention arranges the bimetal timer 3 at a position that is easily affected by the heat of the main heater 4, so that the internal temperature reaches a predetermined high temperature state, and is almost unaffected by the outside temperature. Therefore, the set time can be accurately set to a desired time.

The embodiment shown in FIG. 3 has a structure in which a bimetal timer 3 is attached to the outer peripheral surface of the main heater 4 via a heat transfer plate 19, and the embodiment shown in FIG. A bimetal timer 3 is attached to the outer peripheral surface of the vessel 10 via a heat transfer plate 20, and the bimetal timer 3 is disposed at a position easily affected by the heat of the main heater 4. Also in these embodiments, although not shown, the outer surface of the bimetal timer 3 is covered with the heat insulating material 15.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, the bimetal timer 3 may be disposed at a position other than that shown in the above embodiment as long as it is easily affected by the heat of the main heater 4. Furthermore, the configuration of the main circuit 5 is not limited to that shown in FIG. 2.

(Effects of the invention) The electric pot of the invention has the above-mentioned configuration, and the temperature inside the timer when the bimetal timer starts operating can be set to a substantially constant temperature almost unaffected by the outside temperature. The setting time can be accurately set, and boiling water can be obtained under the precise control of the bimetal timer.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical front view of an embodiment of the present invention, FIG. 2 is a circuit diagram thereof, and FIGS. 3 and 4 are perspective views of essential parts of other embodiments of the present invention. 1... Bimetal switch, 2... Internal heater, 3... Bimetal timer, 4... Main heater, 5... Main circuit.

Claims (1)

[Scope of utility model registration request] A bimetal timer is equipped with a bimetal switch that turns off when the temperature inside the timer exceeds a predetermined temperature, and an internal heater that raises the temperature inside the timer, and when the temperature of water exceeds a predetermined temperature, the internal heater is energized. On the other hand, the bimetal timer is connected to the main circuit so that power to the main heater is cut off when the bimetal switch is turned off, and the bimetal timer is disposed at a position easily affected by the heat of the main heater. electric pot.