JPS6016333Y2 - boiling electric pot - Google Patents

Description

[Detailed description of the invention] This invention relates to a boiling type electric pot that can control the boiling of water in the pot.

Conventional electric pots keep the water in the pot at 90°C to 95°C.
It was not possible to bring it to a boil, only to boil it and keep it warm.

However, it is said that tea etc. tastes best when water is boiled at around 70 degrees Celsius, and an electric kettle capable of supplying such hot water has been desired.

This invention was made to satisfy these demands, and the purpose is to provide a boiling type electric kettle that can boil the water in the pot according to your preference and that is simple in construction. .

Hereinafter, embodiments of this invention will be described with reference to the drawings.

A heating element 3 having a heat output of 620 W, for example, is connected to a commercial AC power source 1 via a first temperature-sensitive switch 2.

The first temperature-sensitive switch 2 is opened when the water temperature in the pot reaches a relatively high first temperature level of 01°C, and once opened, the water temperature is changed to a second temperature level that is sufficiently lower than the above Q□°C. It is set so that it will not close unless the temperature falls below 02°C.

Further, a heat-retaining heating element 5 having a heat generating capacity of 50 W, for example, is connected to the power source 1 via a temperature-sensitive reed switch 4 as a second temperature-sensitive switch.

The temperature-sensitive reed switch 4 is set to open when the water temperature in the pot is above 01°C, which is the heat retention level, and to close when it falls below 01°C.

That is, in this embodiment, the first temperature level and the heat retention level are made equal.

A timer contact 61 of a wind-up timer 6, for example, is connected in parallel to the first temperature-sensitive switch 2 as a manually operated switch.

The timer 6 is configured to close the timer contact 61 for a set time by manually setting the time.

In the embodiment of the present invention having such a configuration, when water at room temperature is filled in the pot and the power supply 1 is turned on at 9, both the first temperature-sensitive switch 2 and the temperature-sensitive reed switch 4 are closed at this point. Therefore, both the heating element 3 and the heat retaining element 5 generate heat, and the water in the pot is heated with a total calorific value of 670 W, raising the temperature.

Then, at time s1, when the water temperature in the pot reaches Q°C, the first temperature-sensitive switch 2 is opened and the temperature-sensitive reed switch 4 is also opened, so that the heating operation is stopped and the water temperature begins to drop.

When the water temperature drops below 01° C., the temperature-sensitive reed switch 4 closes, and the water in the pot is heated only by the heat-retaining heating element 5, causing the water temperature to rise slowly.

When the water temperature reaches 01° C. again, the temperature-sensitive reed switch 4 is opened and heat generation for keeping warm is stopped.

Thereafter, the temperature-sensitive reed switch 4 repeatedly opens and closes once the temperature reaches 01°C, and the water temperature in the pot is kept constant at approximately Q1°C.

If you want to obtain boiling water during such heat retention, for example, at time s2, the wind-up timer 6 is manually set to an arbitrary time, for example, T.

The timer contact 61 is then closed and the heating element 3 generates heat, causing the water in the pot to rapidly rise to the boiling point and boil.

Then, when the time T has elapsed and the time has come, the timer contact 61 is opened, the heating operation of the heating element 3 is stopped, and the heating operation of the heating element 5 for keeping the temperature is started again.

In this way, you can obtain hot water once it has been boiled.

Also, when water is added to the pot during heat retention, and the water temperature drops below 02°C, the first temperature-sensitive switch 2 closes again and the water in the pot is heated by both the light heating elements 3 and 5. It becomes like this.

In this way, if you want boiling water while keeping warm, you can manually set the timer 6 and the water in the pot can be boiled according to your preference.

Further, the boiling control is simple in structure and requires only closing the timer contact 61 connected in parallel to the first temperature-sensitive switch 2 for an arbitrary period of time.

In the above embodiment, a manually operated switch using a spring-type timer contact was described, but the present invention is not limited to this, and a microswitch may be used to manually open and close the contact. It may be.

As detailed above, according to this invention, the relatively high temperature first
The heating element is used primarily to heat the water in the pot up to the temperature level, and after that, the temperature is controlled by the heating element.
In this state, by operating the manual operation switch, the heating element is operated to boil the water in the pot for any desired time, so you can get boiling water according to your preference and the configuration is simple. It is possible to provide a boiling layer electric kettle.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of this invention, and FIG. 2 is a graph showing changes in pot water temperature in the same embodiment. 1... Commercial AC power supply, 2... First temperature-sensitive switch, 3... Heating heating element, 4...
...Temperature-sensitive reed switch, 5...Heating element for heat retention, 61...Timer contact of wind-up timer.

Claims (1)

[Scope of utility model registration request] A heating element with a relatively large calorific value connected to the power supply via a first temperature-sensitive switch, and a heat-retaining heat generating element with a relatively small calorific value connected to the power supply through a second temperature-sensitive switch in series. and a manually operated switch connected in parallel to the first temperature-sensitive switch, wherein the first temperature-sensitive switch is connected to the first temperature-sensitive pot where the water temperature in the pot is relatively high.
The second temperature-sensitive switch is set to open when the temperature reaches a temperature level of The water temperature in the pot is at least the second level above.
A boiling type electric kettle, characterized in that it is set to open when the temperature exceeds a heat retention level set higher than the temperature level, and to close when the temperature drops below the heat retention level.