JPS63125221A - Electric jar pot - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric teapot for general household use.

2. Description of the Related Art A conventional electric jar pot of this type includes a water tank for storing water, a heater for heating the water tank, a temperature detecting means for detecting the temperature of the water tank, and a temperature detecting means for detecting the temperature of the water tank. control means for energizing the heater when the temperature is lower than a predetermined temperature, and by controlling the hot water in the water tank to a constant temperature, the user can always use the hot water in the water tank. I was able to use it.

Problems to be Solved by the Invention However, with such a conventional configuration, it is not known when the hot water in the water tank is the same as the water that was put into the water tank. Even if there was water in the water tank, there were cases where the water in the water tank was thrown away because old and dirty water was in the water tank.

The object of the present invention is to provide an electric teapot that solves these problems.

Means for Solving the Problems In order to solve the above problems, the present invention includes a temperature detection means for detecting the temperature of the water tank, and a temperature detection means for detecting the temperature of the water tank, the temperature of which is lower than the first temperature. In this case, if the temperature detected by the control means for energizing the heater and the temperature detected by the temperature detection means is lower than a second temperature set lower than the first temperature, it is reset, and if it is higher, it is activated to a predetermined temperature. This device consists of a timer that outputs an output when the time has elapsed, and a display means that displays the output of this timer.

Effect: According to the above configuration, the hot water in the water tank is always heated to the first temperature. Then, when the user puts new water into the water tank, the water temperature in the water tank temporarily drops to below the second temperature, so the timer is reset, starts a new measurement, and reaches the predetermined temperature. Unless the user adds new cold water and the timer is reset, the timer outputs an output after the predetermined time has elapsed, and the V display means displays an indication based on this output, indicating to the user that the hot water in the water tank is It can warn you that it is old and dirty.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 shows a block diagram of an electric teapot according to an embodiment of the present invention. Reference numeral 1 denotes a water tank for storing water, and the water tank 1 is made of iron, aluminum, or the like and has a cylindrical shape. 2 is a heater that heats the water tank 1; 3 is a temperature detection means provided at the bottom of the water tank 1 and is composed of a thermistor element or the like that detects the temperature of the water tank 1; 4 is a control means; A timer 6 controls the energization of the heater 2 so that the temperature of the water tank 1 detected by the temperature detection means 3 becomes a first temperature. If the temperature temporarily drops below a second temperature due to the user putting new water into the water tank 1, it is reset, and otherwise it is timed and reset for a predetermined period of time (e.g. 1
2 hours) have elapsed. 6 is a display means, and this display means 6 is composed of a lamp or a liquid crystal, etc., and when there is an output from the timer 6, it displays to the user that the hot water in the water tank 1 is old and dirty. Display.

FIG. 2 shows a circuit diagram of an electric jar pot according to an embodiment of the present invention, in which 2 is a heater for heating the water tank 1, 3 is a heater provided in contact with the bottom of the water tank 1, and 3 is a heater for heating the water tank 1; 1 is a so-called one-chip microcomputer consisting of a thermistor V whose resistance value changes according to the temperature, and 7 is a so-called one-chip microcomputer consisting of a CPU, ROM, RAM, etc. This one-chip microcomputer 7 drives a transistor 8 and a relay 9. The controller 2 controls the power supply to the heater 2, and operates the display means 6, which is made up of a transistor 10 and a LIED. Reference numeral 11 denotes a MU/D converter, which converts a voltage corresponding to the resistance ratio of the temperature detecting means 3 and the temperature detecting resistor 12 into a digital signal and outputs the digital signal to the microcomputer 7.

The operation of the electric jar pot in the above embodiment will be explained based on the flowchart shown in FIG.

When the device is powered on and the program is started, in step 13, if the temperature t of the water tank 1 detected by the temperature detection means 3 is lower than the first temperature T, then step 1 is executed.
In step 4, the microcomputer 7 drives the relay 9 to energize the heater 2. Conversely, when the temperature t is higher than the first temperature T, the microcomputer 7 stops energizing the heater 2 in step 16. The above steps 13, 14, and 16 are repeated, and the power supply to the heater 2 is controlled so that the temperature of the water tank 1 becomes the first temperature.

Next, when the temperature t of the water tank 1 is lower than the second temperature T2 in step 16, the timer 4 is reset in step 17. This occurs when the user fills the water tank 1 with fresh water. Conversely, the temperature t of the water tank 1 is the second
When the temperature is higher than T2, timer 3 starts step 18.
When the predetermined time No has elapsed in step 19, the LED constituting the display means e lights up in step 2o to display to the user that the hot water in the water tank 1 is old and dirty.

Effects of the Invention As described above, the electric teapot of the present invention detects that the user has added new water based on a temperature change in the water tank, and displays an indicator when new water is not added for a predetermined period of time. By being able to warn the user, the user will no longer drink old, dirty, unsanitary water, and
On the other hand, it is very useful and convenient because it eliminates the need to throw away the water in the water tank because it is old.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electric jar pot showing an embodiment of the present invention, FIG. 2 is a circuit diagram of the same electric jar pot, and FIG.
The figure is a flowchart showing the operation of the electric jar pot. 1...Water tank, 2...Heater, 3.
... Temperature detection means, 4 ... Control means, 6
...Timer, 6...Display means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] a water tank for storing water; a heater for heating the water tank; a temperature detection means for detecting the temperature of the water tank; If the temperature detected by the control means for energizing the heater and the temperature detection means is lower than a second temperature set lower than the first temperature, the temperature is reset, and if the temperature is higher than the first temperature, the temperature is activated and continues for a predetermined period of time. This electric jar pot consists of a timer that outputs an output when the elapsed time has elapsed, and a display means that displays the output of the timer.