JPS6223403Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electric pot that boils water stored in a tank via a heater and keeps it warm.

This type of pot has a heater installed around the outer circumference of the tank, and this heater heats the water in the tank by 90%.
The water is boiled to a temperature of ~95°C, and then the temperature of the water is maintained at the same temperature as at the time of boiling, either by intermittent energization of the heater or by a separate heat-retaining heater. However, when making tea using lever water, if the type of tea is bancha, the above-mentioned method will be applied.
A temperature of 90-95°C is suitable. However, in the case of Gyokuro tea, etc., a temperature of 90 to 95 degrees Celsius is too high and inappropriate. The problem was that it required cumbersome measures such as waiting until it cooled down to a temperature of 60 to 70 degrees Celsius, which is suitable for the environment.

This idea was developed with this in mind, and its purpose was to keep the boiled water in the tank at two temperatures, high and low, by opening and closing the switch. The purpose is to provide electric pots.

An embodiment of this invention will be described below with reference to the drawings. 1 in the figure is a cylindrical case molded from synthetic resin, and the upper end of this case 1 has an inner lid 2.
However, a bottom cover 3 is attached to each lower end. A replenishment port 2a is formed in the inner lid 2, and an opening/closing plug 5 is removably fitted into the replenishment port 2a via a packing 4. A holding plate 7 is provided horizontally on the inner bottom of the case 1 via a pair of supporting leg pieces 6, 6, and a tank 8 formed in a cylindrical shape with a bottom is mounted and held on the upper surface of this holding plate 7. There is. A flange 9 having an arcuate cross section is integrally formed on the periphery of the upper opening of the tank 8, and this flange 9 connects to the inner lid 2.
Packing 1 in the groove 10 formed around the lower surface of the
The two are airtightly fitted via 0a, and are pressed and held by a pushing member 11. Further, a band-shaped heater 12 of about 640 W and a heat-retaining heater 13 of about 40 W are attached to the outer peripheral surface of the lower end of the tank 8, respectively, and the outer circumferences of these heaters 12 and 13 are covered with a heat insulating material 14. Further, above the heaters 12 and 13, a manually reset limiter 12a and a heat-retaining thermostat 13a are provided.

On the upper surface side of the inner lid 2, an outer lid 16 which is hemispherical and has a recess 15 at its top is rotatably provided via a pin 16a. The outer cover 16 and the inner cover 2 each have a protrusion 1 that protrudes laterally.
7 and 18 are integrally formed, overlap each other, and are locked via an externally operable hook 19. A supply passage 20 is formed on the upper surface of one of the protrusions 18 , a conduit 21 is connected to the base end of this supply passage 20 , and the lower end of this conduit 21 faces the inner bottom of the tank 8 . Further, the distal end side of the supply path 20 is open to the outside via the supply port 22.

An air pump mechanism 23 is incorporated inside the outer lid 16. That is, a substrate 24 is provided horizontally on the lower surface of the outer lid 16, and a bellows 25 is attached to the upper surface of this substrate 24. This bellows 2
5 has a movable plate 26 at the upper end, and this movable plate 26 is connected to a spring 27 disposed inside the bellows 25.
is urged upward by. Recess 1 of outer lid 16
A push body 28 is loosely fitted in the interior of the recess 15 so as to be movable up and down, and interlocking pieces 29, 29 are integrally formed on both sides of the push body 28. The movable plate 26 faces the periphery of the movable plate 26 through through holes 31, 31 formed in the movable plate 26.
An introduction hole 32 is formed in the center of the movable plate 26,
An annular packing 33 is formed on the inner peripheral edge of this introduction hole 32.
is fitted. A cylinder 34 is slidably inserted into the bottom plate 30 of the recess 15, one end of which is fixed to the inner surface of the pusher 28 via a screw 35, and the other end has an abutment plate 36. This contact plate 36 faces the introduction hole 32 . A spring 37 having a smaller spring coefficient than the above-mentioned spring 27 disposed inside the bellows 25 is provided between the abutting plate 36 and the movable plate 26, and the elastic force of this spring 37 causes the abutting plate 36 to The pushing body 28 is integrally urged upward, and a small gap 38 is secured between the contact plate 36 and the introduction hole 32.

An annular projecting wall 40 is integrally provided on the upper surface of the opening/closing stopper 5. A packing 41 is attached to the projecting wall 40, and the base plate 2 of the outer lid 16 is attached to the packing 41.
4 are in contact with each other in an airtight manner so as to be able to freely approach and separate. On the inner side of the projecting wall 40, through holes 42 and 43 are formed in the base plate 24 and the stopcock 5, respectively.

Next, to explain the electric circuit, as shown in FIG. 2, the heat retention heater 13 and the heat retention thermostat 13a are connected in series between both terminals of the power supply 44.
A heater 12, a series circuit A including a heat retention indicator lamp 45 and a first resistor 46 are connected in series between both ends thereof. and heater 12
has a heating indicator lamp 47 and a second resistor 48.
A series circuit B is connected in parallel, and a limiter 12a is connected in parallel to the series circuit A. Further, a manual changeover switch 49 is connected in parallel to the heat retention thermostat 13a, and this changeover switch 49 and each of the indicator lamps 45,
47 is disposed at the lower end of the case 1 as shown in FIG. The resistance values of the first and second resistors 46 and 48 are each 15KΩ.

Next, the effect will be explained. When water is stored in the tank 8 and the power source 44 is turned on, the limiter 12a and the heat retention thermostat 13a are activated in the initial state.
are closed, the heat is connected to the heat retaining heater 13 through the heat retaining thermostat 13a, and to the heat retaining heater 12 and the series circuit B through the limiter 12a.
A current flows through each of the heaters 1 and 1.
2 and the heat-retaining heater 13 generate heat, the water in the tank 8 is heated and the temperature rises, and at this time only the heating indicator lamp 47 lights up. In addition, heater 1
2, while the heat retention heater 13 is 40W,
Since the tank 8 has a large capacity of 640W, the temperature of the water in the tank 8 is raised exclusively by heating by the heater 12.
In this way, the temperature of the water in tank 8 rises to 60 to 70℃.
When the temperature reaches 90°C to 95°C, the contacts of the heat-retaining thermostat 13a first open, and when the temperature further rises to 90 to 95°C, the contacts of the limiter 12a open. Then, current flows through the heater 12 and the series circuit B through the series circuit A. In this case, the resistance value of the resistors 46 and 48 provided in the series circuits A and B is 15KΩ, while the resistance value of the heater 12 is about 16Ω. The voltage applied to both ends of the parallel circuit becomes very small, so the heater 12 generates almost no heat.
Also, at this time, the heating indicator lamp 47 of the series circuit B
goes out, and the heat retention indicator lamp 45 of the series circuit A lights up. And under such conditions,
When the changeover switch 49 is closed, the heat retention heater 1 is turned on through the changeover switch 49.
3 is continuously energized, so that the hot water in the tank 8 is kept at a high temperature of 90 to 95° C., as shown by A in FIG. On the other hand, the changeover switch 49
When the tank 8 is opened, the power supply to the heat retaining heater 13 is temporarily cut off, and the temperature of the hot water in the tank 8 decreases. When the water temperature drops to 60 to 70°C, it is sensed by the heat retention thermostat 13a, its contact closes, the heat retention heater 13 is energized, the water temperature rises slightly, and accordingly the heat retention thermostat 13a The contact point opens again, and by repeating this process, the hot water in the tank 8 is kept at a low temperature of 60 to 70°C, as shown by B in FIG.

In this way, by opening and closing the changeover switch 49, the hot water in the tank 8 can be heated to a high temperature of 90 to 95 degrees Celsius and a high temperature of 60 to 70 degrees Celsius.
It can be kept warm in two stages with the low temperature of
Therefore, when high-temperature water is appropriate, such as bancha, the former is kept warm, and when low-temperature water is appropriate, such as gyokuro tea, the latter is kept warm. Able to properly prepare tea according to the situation.

By the way, when taking out the hot water in the tank 8, the pushing body 28 is first pressed downward. In response to this, the contact plate 36 comes into contact with the packing 33, the introduction hole 32 is hermetically closed, and then the movable plate 26
is pressed downward, the bellows 25 is compressed together with the air inside, and the compressed air flows through the through holes 42 and 43.
It is discharged into the tank 8 through. This discharge pressurizes the surface of the hot water in the tank 8, and accordingly, the hot water is discharged to the outside through the conduit 21, the supply path 20, and the supply port 22. After that, when the pressing of the pushing body 28 is released, the contact plate 36 is separated from the packing 33 together with the pushing body 28 due to the elastic force of the spring 37, and external air flows into the bellows 25 from the gap 38 through the introduction hole 32. In response to this, the bellows 25 returns to its original state by the elastic force of the spring 27. By repeating this process, any desired amount of hot water can be extracted.

As explained above, according to this invention, it is possible to keep the boiled water in the tank at two levels of temperature, high and low, by opening and closing the changeover switch. This has the effect of allowing hot water at an appropriate temperature to be obtained directly from the tank.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, FIG. 2 is an electric circuit diagram thereof, and FIG. 3 is a diagram showing the heat retention characteristics of hot water. 8... Tank, 12... Heater, 13...
Heat retention heater, 13a...Warmth retention thermostat, 4
9... Changeover switch.

Claims (1)

[Scope of utility model registration request] A heater and a heat retention heater are installed in the tank.
In the device in which the water in the tank is boiled by the heater and kept warm by the heat-retaining heater, a heat-retaining thermostat is provided in series with the heat-retaining heater, and a changeover switch is provided in parallel to the heat-retaining thermostat to switch the temperature. When the switch is closed, the heater is continuously energized to keep the hot water in the tank at a high temperature, and when the changeover switch is opened, the heater is intermittently energized via the thermostat to maintain the hot water in the tank. An electric kettle that is characterized by keeping food at a low temperature.