JPS6340180Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention relates to a water temperature control device for a boiling type electric pot.

(2) Prior Art In boiling-type electric pots, it has been conventional practice to detect a boiling state based on steam temperature, etc., and then cut off the electric circuit of the kettle heater to shift to a warm state.

(3) Problems to be solved by the invention When trying to detect a boiling state based on steam temperature, etc., there was a problem in that the mounting position of the temperature sensing element as a detection element was limited. For example, if the detection element is attached to the bottom of the medium container, the boiling state cannot be detected accurately. Therefore, it has been necessary to adopt a configuration in which, for example, a detection element is attached above the full quantity indicating line to detect the steam temperature.

(4) Means for solving the problems In order to solve the above problems, this device has a common terminal, a normally closed side terminal, and a normally open side terminal, and operates at a predetermined temperature lower than the boiling point. The water heater is connected to the power supply through the normally closed terminal of the three-terminal water boiler thermoswitch and the common terminal, and the normally open thermoswitch of the manually set thermal timer is connected between the normally open terminal and the power supply. It has a configuration in which a series circuit of elements is connected.

(5) Effect In the hot water temperature control device having the above configuration, when the power is turned on, the water heater is energized. The thermal timer is set before or after power is turned on.
As a result of the water boiling thermoswitch being activated before the water temperature reaches the boiling point, the water boiling heater is connected to the power supply via the thermal timer, and at the same time, the heating element of the thermal timer is energized.

After enough time has elapsed for the water to sufficiently boil from the above state, the thermoswitch of the thermal timer is activated and turns off the electricity to the water heater.

(6) Embodiment Figure 1 shows an example of a hot water temperature control circuit for a boiling type electric pot. In this circuit, 1 is a three-terminal type thermoswitch, and this thermoswitch 1 has a common terminal 2, a normally closed terminal 3, and a normally open terminal 4. Further, 5 is a manually set type thermal timer, and this thermal timer 5 has a push button 6.
a normally open thermoswitch 7 set by the
It consists of a heating element 8 connected in series thereto.

The water boiling heater 9 is connected to a power source 11 having a thermoswitch 10 for preventing dry cooking via the common terminal 2 and the normally closed side terminal 3 of the water boiling thermoswitch 1. In addition, a thermal timer 5 is connected between the normally open side terminal 4 of the water boiling thermoswitch 1 and the power supply 11 side.
is connected.

In addition, in the figure, 12 is a heat retention heater, 13 is a thermal reed switch, 14 is a boiling water indicator lamp, and 15 is a thermal reed switch.
1 is a boiling indicator lamp, and 16 is a heat retention indicator lamp. The heat-sensitive temperature of the thermal reed switch 13 is set so that it operates at a predetermined heat retention temperature.

FIG. 2 shows a part of an electric pot equipped with the above-mentioned circuit.
A water boiling thermoswitch 1 is also installed at an appropriate position in the middle container 17. The hot water boiling thermoswitch 1 is not limited to the illustrated position, but may be placed anywhere, such as at the bottom of the medium container 17, as long as it can detect the temperature of the water before it reaches the boiling point.

The thermal timer 5 is connected to the bottom body 18 of the pot.
will be installed on the

The power source 11 is turned on with water in the inner container 17 of the electric pot. The push button 6 of the thermal timer 5 is operated before or after the power source 11 is turned on, thereby setting the thermoswitch 7.

When the power is turned on, the water heater 9 is energized, and when the temperature reaches a predetermined temperature (85°C to 97°C), the water heater thermoswitch 1 is switched to the normally open terminal 4.
It continues to be connected to the power supply 11 through. Note that the thermal reed switch 13 operates at a predetermined temperature and energizes the heat-retaining heater 12.

In this way, when the circuit of the water heater 9 is switched to the thermal timer 5 side, heating of the heating element 8 of the thermal timer 5 is started. When the thermoswitch 7 is heated by the heating element 8, it returns after a certain period of time and turns off the electricity to the water heater 9. In this case, the time is set to a time sufficient for the water to sufficiently boil.

After the circuit of the water heater 9 is cut off and the water enters the warm state, when the push button 6 is operated, the water heater 9 is energized again and the water is boiled again. Furthermore, when water is added, the water boiling thermoswitch 1 is reset, so that the water boiling heater 9 is energized and the water is boiled again in the same way.

(7) Effects As described above, this invention uses a three-terminal type water boiling thermoswitch in combination with a manually set type thermal timer, so that the water boiling thermoswitch operates by detecting a predetermined temperature before reaching the boiling point. This has the effect of increasing the degree of freedom in the mounting position.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of the embodiment, and FIG. 2 is a schematic sectional view showing a part of the electric pot of the embodiment. 1...Kettle thermoswitch, 2...Common terminal, 3...Normally closed side terminal, 4...Normally open side terminal, 5...
...Thermal timer, 6...Push button, 7...
Thermo switch, 8... Heating element, 9... Water heater.

Claims (1)

[Scope of utility model registration request] 3, which has a common terminal, a normally closed side terminal, and a normally open side terminal, and operates at a predetermined temperature lower than the boiling point.
Connect the water heater to the power supply through the normally closed terminal of the terminal type water boiler thermoswitch and the common terminal, and connect the normally open thermoswitch of the manual set type thermal timer and its heating element between the normally open side terminal and the power supply. A water temperature control device for a boiling electric kettle that is made by connecting a series circuit.