JPS63234918A - 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] (b) Industrial application field The present invention relates to a water heater with a boiling function.

(B) Prior Art Conventionally, for example, Japanese Patent Laid-Open No. 61-29312 discloses a water heater that heats the water to a boiling state and then keeps it warm. However, with such water heaters, after boiling, the temperature is kept warm (generally around 90 degrees Celsius).
Because it takes time for the water temperature to drop to a certain temperature, it is inconvenient if you suddenly want to use water at a warm temperature.

9 Problems to be Solved by the Invention The present invention takes the above-mentioned drawbacks into account and provides a water heater with improved usability.

B) Means for Solving the Problems The water heater of the present invention includes a container, a heater, a temperature sensor, a course selection switch, and controls the heater based on the temperature sensor and controls boiling based on the course selection switch. A control circuit that executes a heat retention course after executing one of a boiling course for heating to a temperature or a boiling course for heating to a substantially warm temperature,
The control circuit executes the boiling course when the power is turned on, executes the boiling course when the course selection switch is operated during the boiling course, and selects the course while the boiling course and the warming course are being executed. When the switch is operated, a boiling course is executed.

2) Function Since the present invention is constructed as described above, if you suddenly want to use water at a keeping temperature after turning on the power, you can achieve the desired purpose by operating the course selection switch. If you want to use boiled water, you can achieve your goal without any operation when the power is turned on, or by operating the course selection switch during the boiling and warming courses.

(f) Example Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a sectional view of the water heater of the present invention, in which (1) is a cylindrical outer frame, (2) is a back cover that closes the lower opening of the outer frame, and (3) is a sectional view of the water heater of the present invention.
1 is a bottomed cylindrical container housed in the outer frame (1);
) is an annular ring that connects and fixes the upper ends of the outer frame (11 and the container (31), and (5) is a heater wrapped around the outer circumference of the lower part of the container (31).
5B). (6) is an outer cover rotatably provided on the outer frame ill, which houses an air pump (7) and is provided with a pusher (81) at the top for suppressing the air pump. (9) An inner lid that closes the top opening of the container (31), and an opening (not shown) that allows the air pump (7) to communicate with the inside of the container (3) and discharges water in the container (31) to the outside. It has a hot water supply pipe (1 liter).

"α" is a first temperature sensor consisting of a negative temperature thermistor fixed to the outer wall of the container (3) slightly above the heater (5); A second one consisting of a negative characteristic thermistor provided with
1 sensor +131 is a display panel provided on the front side of the outer frame (1), and as shown in FIG.
A course selection switch (171) is provided to turn off the hot water lamp, turn off the heat lamp, and keep it open.

Figure 3 is a schematic electrical circuit diagram (7 is an AC power supply,
19 is a microcomputer, ■ is the main heater (5A
) or relay contact, the cause is the above-mentioned heat insulating heater (
5B) is a transistor connected in series with SCR%; ■ is a relay coil that turns the relay contact ■ ON-OFF;
迦、□□□ are comparators, and @ to (to) are resistors. The comparator is gJl's temperature sensor (1
11 is set to output a ``L'' signal when it detects a temperature of 92℃ or higher, and a ``H'' signal when it detects a temperature below 92℃.Comparator ① is set to output a ``H'' signal when the second temperature sensor D detects a temperature of 85℃. When the above is detected, “L1 signal is detected, and
It is set to output a 1H" signal when it detects a temperature below 85°C.

FIG. 4 shows a flowchart of the program written into the microcomputer u9, and the operation will be explained below based on this.

First, when a predetermined amount of water is poured into the container (3) and the power is turned on, the microcomputer αg outputs the 'H' signal from the 01 and 02 ports and contacts the relay contacts ■ and 5CR (21
1 is turned on to start heating by the main heater (5A) and insulating heater (5B), and at the same time, an "H# times signal is output from Os port 8 to turn on the boiling lamp I (steps S-1 and 2). And in this state,
When the water in the container (3) boils and the second temperature sensor detects a steam temperature of 85°C (at this time, the water temperature is approximately 100°C), and the comparator changes from the ``H'' signal to the IILm signal, the micro The computer (19 outputs a 1L" signal from each of the 01 to S ports, and the boiling lamp α41.IJ
Each of the relay contacts (1) and 5CR (Inc.) are turned off (steps S-4 to S-6).

Then, the OI port outputs an H'' signal to turn on the heat retention lamp αe, and after that, the first temperature sensor I detects less than 92°C and the comparator outputs an L# signal. Output 1H1 signal from port and 5CR
(Set 711, BON, and if it detects 92℃ or higher and the comparator (to) outputs a "H" signal, the @L signal is output from the 02 boat and 5CR (21+ is turned OFF and the heat retention course is executed ( Steps S-7, 9 to 11).

Then, when the course selection switch +171 is turned ON while the above-mentioned boiling course (step 5-4) is being executed, the microcomputer gull outputs a "L" signal from the 03 port and an "H" signal from the 04 port. Then, turn off the boiling lamp and turn on the boiling lamp (151) (steps S-3 and 12).In this state, turn off the boiling lamp (151).
The water temperature of the first temperature sensor (111) has increased to 92℃
When the comparator (to) outputs the ``L'' signal, the microcomputer a9 outputs @L'' from the 04 port.
Output the signal and turn on the hot water lamp (151 to 0FFf).
Step 7 Step 5-14.15). Thereafter, steps S-6, 7, 9 to 11 will be performed in the same manner as described above. still,
In this water boiling course (step S-14), when the course selection switch (171) is turned on again, a 1L" signal is output from the microcomputer αU04 port, the water boiling lamp convex is turned off, and the process returns to step l-2 to boil the water. (Step 5-13)
．． 16).

Also, when the course selection switch u1 is turned on during the heat retention course execution (steps S-9 to S-11), the microcomputer (19) outputs an 'L' signal from the 05 boat to turn off the heat retention lamp 0θ, and then the process proceeds to step S- The process returns to step 1 and shifts to the boiling course (steps S-8, 17).
).

(G) Effects of the Invention Since the present invention is constructed as described above, if you suddenly want to use water at a temperature kept warm after turning on the power, you can achieve the purpose by operating the selection switch. can.

) Also, it is easy to use because it allows you to freely shift from the boiling course to the boiling course, from the boiling water course to the boiling course, and from the keep warm course to the boiling course, and the transition operation can be performed with a single course selection switch. It is very flexible.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the water heater of the present invention, Fig. 2 is a front view of the display panel, Fig. 3 is a schematic electrical circuit diagram, and Fig. 4 is a diagram of the water heater written in the microcomputer. It is a flowchart of the program. (3)... Container, (5)... Heater, (111, Mouth... First and second temperature sensor, u71... Course selection switch, a... Microcomputer (control circuit) ). Applicant: Sanyo Electric Co., Ltd. (1 other person) Representative: Patent attorney Takuji Nishino (1 other person) Figure 1 Figure 2 Figure 8

Claims (1)

[Claims] (1) A container that stores water, a heater that heats the container, a temperature sensor that detects the temperature of the container or the ambient temperature inside the container, a course selection switch, and controls the heater based on the temperature sensor. and a control circuit that executes the keep-warm course after executing either a boiling course for heating to boiling temperature or a boiling course for heating to approximately keep-warm temperature based on the course selection switch, wherein the control circuit executes the keep-warm course when the power is turned on. At times,
The boiling course is executed, and when the course selection switch is operated during execution of the boiling course, a boiling course is executed, and when the course selection switch is operated during execution of the boiling course and the warming course, the boiling course is executed. A water heater characterized by: