JPH0975221A - Electric water-heater pot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hot-water delivery button and a reheating button from being pushed by mistake, by providing the hot-water delivery button at the upper part of the body and also providing the reheating button at the different part of the body from the upper part thereof. SOLUTION: A hot-water delivery button 14 is provided at the upper part 1a of the body to put on or off a hot-water pump 9. A reheating button 15 is provided at a specified position of the body 1, the lower part 1c of the body for instance, different from the upper part of the body, to put on or off the heater in order to boil the water again. Since the hot-water delivery button 14 is provided at the upper part of the body where is the most conspicuous position and the reheating button 15 is provided at an inconspicuous position different from the upper part of the body, the reheating button is prevented from being pushed on by aged persons.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electric pot for boiling hot water.

[0002]

2. Description of the Related Art Conventionally, an electric pot of this type is disclosed in, for example, Japanese Patent Laid-Open No. 60-253417. According to this publication, a hot water pump for supplying water in the container to the outside of the body and a hot water button for energizing the hot water pump are provided on the upper part of the main body, and a reboil button for boiling the water in the container is provided on the upper part of the main body. It is provided in.

[0003]

In such an electric pot, the hot water button and the reboil button are arranged close to each other on the upper part of the main body. There is the first drawback of pushing. For example, if the user intends to press the hot water button but accidentally presses the reboil button, the hot water does not come out.

There is a second drawback in that the hot water is accidentally touched when the reboil button is pressed, and hot water is unintentionally discharged. Therefore, the present invention provides an electric kettle that does not accidentally press the hot water button and the reboil button in consideration of such conventional drawbacks, and does not discharge hot water even if the hot water button is accidentally touched when the reboil button is pressed. .

[0005]

In order to solve the above problems, the present invention provides a container for containing water, a main body for containing the container, a heater for heating the container, and water to be supplied to the outside of the main body. A hot water pump, a hot water button for energizing the hot water pump, and a reboil button for powering the heater to reboil water.The hot water button is provided on the upper part of the main body, and the reboil button is different from the upper part of the main body. It is provided on the part.

Preferably, a control circuit for controlling the output to the heater is provided, and the hot water pump is energized even if the hot water button is turned on within a predetermined time or when the reboil button is on. The control circuit controls so as not to do so.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
Will be described with reference to FIG. FIG. 1 is a sectional view of an electric pot according to the present embodiment, and FIG. 2 is an electric circuit diagram of the electric pot. In these figures, the main body 1 has an upper portion 1a and a middle portion 1b.
And lower part 1c. The middle portion 1b of the main body is, for example, a cylindrical shape made of an iron plate or the like, and the upper portion 1a of the main body is made of, for example, a resin molded product and is disposed above the middle portion 1b of the main body. The lower portion 1c of the main body is made of, for example, a resin molded product and is arranged below the middle portion 1b of the main body.

The container 2 has, for example, a cylindrical shape with a bottom, is contained in the main body 1, and water is contained in the container 2. The heater 3 is composed of a water heater 4 and a heat-retaining heater 5 which are closely attached to the bottom of the container 2.
Is to be heated. A storage space 7 is provided between the back portion 6 of the lower portion 1c of the main body and the bottom wall of the container 2.

The hot water supply pipe 8 has one end communicating with the container 2 and the other end extending out of the main body 1. The hot water pump 9 is located in the path of the hot water supply pipe 8, is arranged and fixed in the storage space 7, and is driven by the DC motor 10. In this way, the hot water pump 9 supplies the water in the container 2 to the outside of the main body 1. The storage box 11 stores control components for controlling the hot water heater 4, the warming heater 5, and the hot water pump 9.

The temperature sensor 12 is closely attached to the outer bottom surface of the container 2. The lid 13 is provided on the upper part of the middle part 1b of the main body so as to be openable and closable so as to be adjacent to the upper part 1a of the main body. The vapor in the container 2 passes through the lid body 13
A passage 13a is provided for discharging to the outside. The hot water button 14 is a switch that is provided on the upper portion 1a of the main body and that turns on or off the hot water pump 9.

The reboil button 15 is provided in a predetermined portion of the main body 1 different from the upper portion 1a of the main body, for example, in the lower portion 1c of the main body, and turns on or off the heater 3 so as to reboil the water in the container 2. It is a switch to do. The reboil button 15 is energized (on) while being pressed with a hand, and cut off (off) when the hand is released.

Next, the electric circuit will be described with reference to FIG. AC power supply 1 with surge absorber 16 and capacitor in parallel
7 is connected. The relay contact 18 is connected in series to the water heater 4, and the series circuit is connected to the AC power supply 17.

The rectifier 19 comprises, for example, a bridge rectifier, the midpoint of which the diodes D1 and D2 are connected to the first lead wire 20, and the midpoint of which the diodes D3 and D4 are the second.
It is connected to the lead 21a. The warming heater 5 has one end connected to the midpoint between the diodes D2 and D3 and the other end connected to the other end of the AC power supply 17.

The control element 22 is made of, for example, TRIAC, is connected between the first lead wire 20 and the second lead wire 21a, and the gate of the control element 22 is connected to the third lead wire 21b via the resistor and the Zener diode 23. It is connected.

The capacitor 24 is connected between the first lead wire 20 and the third lead wire 21b. The DC motor 10 and the hot water button 14 are connected in series, one end of the series circuit is connected to the collector of the transistor 25, and the other end is connected to the third lead wire 21b. The base of the transistor 25 is connected to a terminal P1 of a control circuit 27 including a microcomputer via a resistor and a fourth lead wire 26.
It is connected to the.

In the relay circuit 28, a coil and a diode are connected in parallel, one end of the relay circuit 28 is connected to the collector of the transistor 29, and the other end is connected to the third lead wire 21b. The emitter of the transistor 29 is connected to the first lead wire 20, and the base of the transistor 29 is connected to the terminal P2 of the control circuit 27 via the fifth lead wire 30.

One end of the sixth lead wire 31 has the first lead wire 2
0, and the other end is connected to the terminals P3 and P4 of the control circuit 27. The other end of the sixth lead wire 31 is connected to the heat-retaining lamp 32 via a resistor to the terminal P5, and the water heating lamp 33 is connected via a resistor to the terminal P6.
5 and a resistor via a resistor. The warming lamp 32 and the water heating lamp 33 constitute a display portion 33a.

The cathode of the Zener diode 34 is the first
It is connected to the lead wire 20, its anode is connected to the base of the transistor 35, and its anode is connected to the third lead wire 21 b via the resistor 36. The emitter of the transistor 35 is shared with one end of the capacitor 37 and is connected to the seventh lead wire 21c. The portion of the ground symbol connected to each terminal of the control circuit 27 indicates that it has the same potential as the seventh lead wire 21c. Then, one end of the capacitor 37 is connected to the first lead wire 20.

One end of the temperature sensor 12 has a sixth lead wire 3
1, and the other end of the temperature sensor 12 is connected to the terminal P8 of the control circuit 27 via the resistor and the eighth lead wire 38. The electric pot according to the present embodiment is configured by these components.

Next, the operation of this electric pot will be described with reference to FIGS. FIG. 3 is a flow chart of a control circuit used for this electric pot. In these figures,
First, water is put in the container 2 and the power plug of the electric pot is inserted into a power outlet (neither is shown) to start.

Next, heat treatment is performed (step S1). That is, when the AC power supply 17 has a positive potential, the diode D1, the first lead wire 20, the capacitor 24, the third lead wire 21b, the diode, the second lead wire 21a, the diode D3, and the heat insulation heater 5 are passed from one end of the AC power supply 17. A current flows to the other end of the AC power supply 17, and the voltage across the capacitor 24 starts to rise.

When the voltage across both ends is further increased to reach the Zener voltage of the Zener diode 23, for example, 15 V or more, the gate current of the control element 22 flows and the control element 22 is turned on. As a result, a current mainly flows to the control element 22 and almost no current flows to the capacitor 24, and the capacitor 2
The voltage across 4 drops. When the voltage across the capacitor 24 becomes equal to or lower than the Zener voltage of the Zener diode 23, the gate current to the control element 22 is turned off, and the control element 2
2 turns off.

As a result, no current flows through the control element 22, a charging current mainly flows through the capacitor 24, and the voltage across the capacitor 24 rises again. In this way, the voltage across the capacitor 24 is kept substantially constant, and the DC motor 1 connected in parallel to both ends of the capacitor 24
0, the relay circuit 28, and the control circuit 27 are supplied with a substantially constant voltage.

Next, when the above-mentioned stable voltage is obtained, the container 2
When the temperature sensor 12 detects that the water temperature inside is "low temperature", the control circuit 27 outputs an "L" signal to the terminal P2. As a result, the transistor 29 is turned on, the relay circuit 28 is energized, the relay contact 18 is turned on, the water heater 4 is energized, and the "water heating operation" is started.

When the water temperature detected by the temperature sensor 12 is determined to be "boiling" in the control circuit 27, the water heater 4 is de-energized and the heat retaining heater 5 is energized. As a result, the water temperature is kept at about 95 ° C., for example.

Next, when it is determined that the reboil button 15 is pressed and turned on (step S2), the control circuit 27 outputs the "H" signal to the terminal P1. Then, the timer (time measuring means) provided in the control circuit 27 is reset (step S3). As described above, the "H" signal at the terminal P1 increases the voltage of the fourth lead wire 26 connected to the terminal P1 and turns off the transistor 25 (step S4).

If it is determined that the reboil button 15 is not turned on (step S2), and if it is determined whether the reboil button 15 is changed from on to off (step S5), the control circuit 27 The timer starts counting (step S6). That is, after the reboil button 15 is pressed, the hand is released, and the fact that the input to the terminal P7 of the control circuit 27 is changed from the "H" signal to the "L" signal is input to the control circuit circuit 27. It is determined as YES in S5, and the timer count is performed.

Then, the count time t is the predetermined time T
If it is determined to be within (for example, about 3 seconds) (step S7), the transistor 25 is turned off (step S).
4).

When the transistor 25 is turned off, the DC motor 10 connected to the transistor 25 remains in the non-energized state. That is, even if the hot water button 14 is turned on within a predetermined time T from the time when the reboil button 15 is turned on or the time when the reboil button 15 is changed from on to off,
The DC motor 10 is de-energized, the hot water pump 9 is de-energized, and no hot water is discharged.

Further, the count time t is the predetermined time T
(Step S7), the control circuit 27 determines that the terminal P
The "L" signal is output to 1. As a result, the voltage of the fourth lead wire 26 connected to the terminal P1 drops, and the transistor 25 is turned on (step S8).

Since the transistor 25 is turned on, when the hot water button 14 is turned on, the DC motor 10 is energized, the hot water pump 9 is turned on, and hot water starts to be discharged. Like this
Even if the hot water button 14 is turned on within the predetermined time T after the reboil button 15 is turned on or off, the hot water does not come out. Therefore, while pressing the reboil button 15 on the lower part 1c of the main body, or when the button is pressed and released for a while, the hot water will not be accidentally touched by the hot water button 14 on the upper part 1a of the main body. Increase.

When it is judged NO whether the reboil button 15 has changed from on to off (step S5),
That is, when the reboil button 15 is kept in the off state all the time, the process proceeds to immediately before step S2. And step S
When 4 and S8 are completed, "next processing" (step S9)
Proceed to and perform heat retention operation. This is the end of the description of the operation of the electric pot.

[0033]

As described above, according to the present invention, the hot water discharge pump is operated and the hot water discharge button most frequently used is provided on the most noticeable upper portion of the main body, so that it can be easily handled by the elderly and the like. And a reboil button to reboil the water is provided in a part that is hard to see, different from the upper part of the main body,
This prevents elderly people from accidentally pressing the reboil button.
As a result, it is possible to prevent the hot water from coming out by mistakenly pressing the hot water button as the reboil button.

It is also desirable that when the reboil button is on, the hot water pump is de-energized and the hot water is prohibited even if the hot water button is pressed. As a result, it is possible to prevent hot water from being discharged and touching the body even if the hot water button is accidentally touched when the reboil button is pressed.

Then, after the reboil button is turned on and then turned off, the hot water is prohibited within a predetermined time, so that the time until the reboil button is pushed by hand and the hand is retracted is taken into consideration.
Even if another hand touches the hot water button during that time, it is possible to prevent the hot water from touching the hand operating the reboil button.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric pot according to an embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the electric pot.

FIG. 3 is a flowchart of a control circuit used for the electric pot.

[Explanation of symbols]

 1 Main body 1a Upper part of main body 2 Container 3 Heater 9 Hot water pump 14 Hot water button 15 Reboil button

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Arinaka 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A container for containing water, a body for housing the container, a heater for heating the container, a hot water pump for supplying the water to the outside of the main body, and a hot water button for energizing the hot water pump. And a reboil button for energizing the heater so as to reboil the water, the hot water button is provided on the upper part of the main body, and the reboil button is provided on a main body part different from the upper part of the main body. An electric kettle characterized by. 2. A hot water pump provided with a control circuit for controlling the output to the heater, etc., even if the hot water button is turned on within a predetermined time after the reboil button is turned on or when the reboil button is turned off. The electric pot according to claim 1, wherein the control circuit controls so as not to energize the electric pot.