JPH03268715A - Electric boiler - Google Patents

Abstract

PURPOSE:To surely offer boiled hot water when a prescribed time elapses even if there is a variance due to the water temperature, etc., by determining a first heating start time for starting heating by the water quantity in a container. CONSTITUTION:By a setting means 9, a boiling end time is set as a set time T, and subtraction of a time counting means 11 is started by a time counting start means 10. In this case, a time setting means 7 determines a first heating start time T1 by the detected water quantity. When the remaining time becomes T1, a heating element 2 is conducted electrically and raises a liquid temperature in a container 1. Subsequently, when a liquid in the container 1 boils up, energizing of the heating element 2 is stopped, and it is left as it is until the remaining time comes to a second heating start time T2 for reboiling up the liquid in the container 1. When the time comes to T2, the energizing of the heating element is restarted until boiling-up is detected, and when boiling-up is detected, boiling-up is informed by stopping the electric conduction of the heating element 2 and operating an informing means 15. In such a way, hot water immediately after boiling-up can be obtained at the set time T.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to heating and keeping a liquid contained in a container 7,
This invention relates to an electric water heater that can dispense boiling water when needed.

BACKGROUND OF THE INVENTION In recent years, there has been a demand for electric water heaters that heat and keep liquid stored in a container and capable of dispensing boiling water when needed.

Conventionally, this type of electric water heater has a setting means and a timer means, and starts boiling water when the set time elapses by the setting means. Problems that the Invention Attempts to Solve With such conventional electric water heaters, it is difficult to provide hot water at the desired time to the user. In other words, boiling water starts after a predetermined period of time has elapsed, so it takes time for the water to boil, and the amount of water is the amount of water until it boils.

Changes may occur depending on factors such as water temperature.1. This makes it difficult to obtain freshly boiled water at a specific time, making it inconvenient to use.

The present invention is intended to solve the above-mentioned problems, and its first object is to provide boiling water reliably after a predetermined period of time has elapsed. Furthermore, even if there is an act of changing the amount of water before the first heating start time determined by the output of the water amount detection means, the second purpose is to reliably provide boiling water after a predetermined period of time has elapsed. There is. A third objective is to provide boiling water reliably even when the amount of water changes during heating and boiling detection deviates from the boiling end time.

Means for Solving the Problems In order to achieve the object of item (g) 81, the present invention provides a heating element for heating the liquid in the container, a driving means for controlling the energization of the heating element, and a Temperature Fg that detects liquid temperature!
: a detection means, a boiling detection means for detecting boiling and driving the driving means, a water amount detection means for detecting the liquid concentration in the container, and a control means for controlling the water amount detection means;
Setting the boiling end time and driving the T-stage control J7) A setting means, a timing means for counting the time until the boiling end time, and a first heating start time determined based on the output of the water amount detecting means. and a time comparing means for inputting the output of the clocking means and the output of the time setting means to operate the iffff driving means, and the time comparing means operates the first heating start time and the first heating start time. 1. The driving means is driven when the second heating start time is reached, at which the heating is completed within the heating start time and the temperature is about to be re-boiled. This is the first means of solving the problem.

In order to achieve the above second objective, in addition to the above first problem solving means, the output of the opening/closing detection means for detecting opening/closing of the lid is inputted to the control means, and the first heating start time force is set. Supervisor 1
The second problem-solving means is that if the lid is opened before the time is reached, the time setting means sets the first heating start time (self-pressure).

In addition to the above-mentioned first problem solving means, if the output of the hot water detection means for detecting hot water is inputted to the control means and the hot water is discharged by the time the first heating start time is clocked t'l-, the time is set. The means is the third problem-solving means and L2 that the first heating start time is modified. Furthermore, the above 1. In addition to either the second or third problem solving stage, the time comparison means is configured to perform a time comparison when the first heating start time is set to a time longer than the time measured by the time measurement means. The fourth means of solving the problem is to drive the drive means immediately.
．． In addition to either the third or fourth problem-solving means,
It is equipped with a notification means for giving notification by sound or light, and when the time comparison means detects boiling from the second heating start time before the boiling end time, the notification means is turned on at that point. This is the means to solve the fifth problem. Also, the above 1. Second. In addition to either the third or fourth problem-solving means, the time comparison means detects boiling from the second heating start time when the boiling end time is reached. If not, the notification means is turned on when boiling is detected.

Effect of the Invention The present invention uses the above-mentioned first problem-solving means, so that when you want to obtain boiling water at a desired time, you can set the first heating start time, which starts heating depending on the amount of water in the container, by simply setting the time. It is possible to finish boiling around a predetermined time before the set time, although it varies depending on the temperature such as water temperature. To heat it up,
Variations due to water temperature can be eliminated, and boiling water can be obtained at a set time.

In addition, in the second problem solving method, when the water volume is increased or decreased by opening the lid, if the water volume changes before the first heating start time, the first heating start time is corrected and the water boils at the set time. You can get finished hot water.

In addition, according to the third problem solving means, when the amount of water is reduced by dispensing hot water, if the amount of water changes before the first heating start time, the first heating start time is corrected to obtain hot water that has finished boiling at the set time. be able to.

In addition, by the fourth problem solving means, when the amount of water increases before the first heating start time and the heating start time is set before the time that has already been clocked, heating is started immediately, and around the set time. You can get hot water that has finished boiling.

Furthermore, according to the fifth problem-solving means, if boiling is detected before the boiling end time due to a change in the amount of water being heated, a boiling alarm is issued at that point and boiling is terminated, thereby ensuring that hot water is provided. .

In addition, according to the sixth problem-solving means, if boiling has not finished when the boiling end time comes due to a change in the amount of water during heating, the water is heated until boiling is finished, and when boiling is finished, a boiling alarm is sent and the boiling is finished. It can reliably provide boiling water.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

As shown in the figure, a container 1 contains a liquid, and is heated by a heating element 2 disposed on its bottom surface and a driving means 3 for controlling energization.

The temperature detection means 4 comes into contact with the bottom surface of the container 1 and outputs a voltage corresponding to the detected temperature to the boiling detection means 6.

When the boiling detection means 5 detects boiling, it turns off the driving means 3. The water amount detection means 6 expresses the amount of liquid in the container 1 in terms of levels and sorts it into N stages.

The time setting means 7 sets the first heating start time (T1) based on the water level detected by the water amount detection means 6. The control means 8 controls the water amount detection means 6.
The setting means 9 sets the time to finish boiling the liquid in the container 1, and drives the control means 8. Timing start means 10
starts subtraction of the value set by the setting means 9. The time measurement means 11 has a time set by the setting means 9, and starts subtraction upon input from the time measurement start means 1o. Time comparison means 1
2 is the value of the clock means 11 and the first value set by the time setting means.
The heating start time or the value of the clock means 11 is compared with the second heating start time, and the drive means 3 is turned on based on the result. When the opening/closing detection means 13 detects that the lid is opened, it drives the control means 8. The hot water detection means 14 drives the control means 8 when detecting the hot water coming out. The notification means 15 uses sound, light, etc. to notify the outside that the boiling point is 9 when the boiling is finished. The display means 16 is set to the clock means 1 by the setting means 9.
Displays the time until the end of boiling set in 2.

FIG. 2 shows changes in temperature and time until the boiling occurs at a set time.The setting means 9 sets the boiling end time as the set time T, and the timer starting means 10 starts subtracting the timer 11. .

At this time, the time setting means 7 determines the first heating start time (T1) based on the detected amount of water. The heating element 2 is not energized until the remaining time reaches (T1), and the lid is opened.
-i or detection of hot water supply.
1" time period (・#X)) 4. When the remaining time reaches (T1), the heating element 2 is energized and the temperature of the liquid in the container 1 is reduced to 1-
Increase by 1 (during the ■ time period). , Next, when the liquid in the container 1 boils, the power supply to the heating element 2 is stopped, and the remaining time is set as the second heating start time (
During the period of ■, when T2) is reached, the heating element 2 is energized again until J boiling, which becomes T2), is detected.
When boiling is detected, the heating element 2 is de-energized and the notification means 15 is activated to notify that boiling has occurred. In this way, hot water immediately after boiling can be obtained at the set time T.

FIG. 3 is a specific circuit diagram of one embodiment of the present invention. In the figure, 17 is an AC power source. The temperature detection means 4 is composed of a thermistor 4a whose resistance value changes depending on the temperature, a resistor 4b which divides the voltage of the thermistor 4a, and an AD converter 4C which inputs this voltage divided value.
0.51]) and outputs it to the microcomputer (L': abbreviated as LP microcomputer) 18 constituting the boiling detection means 5, and uses this output for a predetermined time. (Here, about 25 seconds) Elapsed 1. ”
U also changes the temperature range and is determined to be in a boiling state when it reaches 7.

. The driving means 3 for controlling the energization of the heating element 2 is a relay.
The water amount detection means 6 (in this embodiment, there are four stages) is composed of an electric current 3a and an IJ water point 3b.
Attach the combinations of a, eb, and sc and resistors 6d, 6o, and sf at positions that divide the inside of the container into three equal parts, and
'16a16b16c, transistor 6q and resistor eh,
When the transistor 6q is turned on by the output of the control means 8, the electrode located below the level of the liquid in the container 1 outputs an H signal. Setting means 9 and timing start means 1
0 respectively switches 9a, 10a and resistor 9b
, 10b, and when the switches 9a and 10a are pressed, an H signal is output. The display means 16 is controlled by the setting means 9.
The determined boiling end time (for example, 2 hours, 6 hours, and 8 hours in three stages in this example) is displayed on the LED.
6a, 16b, 16c and resistance 1ed. The notification means 15 includes a buzzer 15a and an LED 5
b. The opening/closing detection means 13 is composed of a switch 13a and a resistor 13b, and the switch 13a turns off when the lid cannot be opened, and turns on when the lid is closed. The hot water supply detection means 14 is defined by a hot water supply means 14a using an electric motor and a hot water supply switch 14b that drives the motor, and when hot water is dispensed, a voltage applied to the motor is generated. The microcomputer 18 has a boiling detection means 5, a time setting means 7, a control means 8, a time measurement means 11, and a time comparison means 12, and realizes these functions by executing a program.

Next, the operation of the above configuration will be explained based on FIGS. 4 and 5.

When the setting means 9 is turned on during warming or heating, the microcomputer 18 turns off the driving means 3 (if heating is in progress) and switches the fourth
Perform the time setting process shown in the figure.

Here, an initial value (2 hours in this embodiment) is set in the timer 11 (step 51), and this value is further output to the display means 16 (LED that indicates the end of boiling in 2 hours) (step 52). ). Next, the water amount detection means 6 is manually operated (step 53), and the first heating start time T1 is set based on this water amount (step 54). Next, in step 56 and step 56, an input from the time measurement start means 104 or the setting means 9 is waited for, and if there is human power from the time measurement start means 1o, the time setting process is completed and the boiling heat B1 in FIG. Do +. Each time when the setting means 9 is inputted in step 56, the value of the timer means 11 is changed to 2 hours - 6 hours - at the end of step 5.
8 hours - Cancellation is set in sequence, the display is changed each time in step 58, and the process returns to step 55. As described above, the boiling end time can be set until the time measurement start means 10 is input, and the process after the old time start means 10 is input is performed.

FIG. 5 shows the operation from the time when the clock starting means 1o is input to when the clock starts rising. In step 61, a subroutine for arithmetic processing is performed. As shown in FIG. 6, this process involves waiting for one minute in step 81 (the waiting time is not limited to one minute), and subtracting the value of the timer 11 in one-minute units in step 82. It is something. Step 61
When the subtraction is performed, the timed value is compared with T1 in step 62, and if the timed value is less than T1, the opening/closing detection means 13 and hot water release detection means 14 are detected in steps 63 and 64.
Check if the lid is open or hot water is being dispensed, step 65
．． At step 66, T1 is corrected and the process returns to step 61, where the process is repeated until the value of the timer becomes less than or equal to T1. When the value of the timer becomes equal to or less than T1 in step 62, the driving means 3 is turned on in step 67, and the subtraction process is repeated in steps 68 and 69, waiting for boiling to be detected. When boiling is detected in step 69, the driving means 3 is turned off (step γ○),
At steps γ1 and 72, the subtraction processing is repeated until the value of the timer 11 becomes equal to or less than T2. If it becomes below T2, the driving means 3 is driven again in step 73. Next, in steps 74, 75, and 76, subtraction processing is performed while waiting for the timer 11 to reach 0 or for boiling to be detected. When the timer 11 becomes 0 here, it waits for boiling to be detected in step 77, and when boiling is detected, step 7
Go to 8. In step 76, even if the timer 11 has not yet reached 0, if boiling is detected, the process goes to step 78. In step 78, the driving means is turned off, and in step 79, the notification means is turned on, and boiling is completed. In this embodiment, there are only three types of time that can be set, but it is possible to freely set the time in units of one minute, for example, and the display means can also be displayed in units of one minute using an LCD or the like. It is also possible to do so.

Effects of the Invention As is clear from the above embodiments, according to the present invention, boiling can be finished at a specific time by boiling twice, which takes time to finish boiling, which varies depending on the amount of water and water temperature. It can provide hot water immediately after boiling at a set time. Furthermore, even if the amount of water changes before the first heating starts, the heating start time can be corrected, and hot water immediately after boiling can be provided at the set time. Furthermore, even if the amount of water changes during heating and the end of boiling is delayed earlier or later than the set time, heating can be continued until the end of boiling without fail, and furthermore, it is possible to issue a boiling notification when the end of boiling is complete. Then, it is possible to provide hot water immediately after boiling at a preset boiling end time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electric water heater according to an embodiment of the present invention, FIG. 2 is a time chart showing temperature changes until boiling in the electric water heater, and FIG. 3 is a specific circuit diagram of the electric water heater. FIG. 4 is a flowchart showing the process during time setting of the t' steam water heater, FIG. 6 is a flowchart showing the boiling process of the electric water heater, and FIG. 6 is a flowchart of the arithmetic processing subroutine. 1... Container, 2... Heating element, 3...
...driving means, 4...temperature detection means, 5...
...Boiling detection means, 6...Water amount detection means,
7... Time setting means, 8... Control means, 9... Setting means, 11... Timing means, 12... Time comparison means.

Claims (6)

[Claims] (1) A heating element that heats the liquid in the container, a driving means that controls the energization of the heating element, a temperature detection means that detects the temperature of the liquid in the container, and a device that detects boiling and stops the driving means. a boiling detection means, a water amount detection means for detecting the amount of liquid in the container, a control means for controlling the water amount detection means, a setting means for setting a boiling end time and driving the control means, and a boiling end time. a time-measuring means for measuring the time until the water amount detecting means; a time-setting means for determining the first heating start time based on the output of the water amount detecting means; and driving the driving means by inputting the output of the time-measuring means and the output of the time-setting means. and a time comparing means, wherein the time comparing means compares the first heating start time and the driving means when the second heating start time from the temperature at which heating is finished to re-boiling within the first heating start time comes. An electric water heater. (2) If the output of the opening/closing detection means that detects the opening and closing of the lid is input to the control means, and the lid is opened before the first heating start time is clocked, the time setting means sets the first heating start time. The electric water heater according to claim 1, wherein the electric water heater is adapted to be modified. (3) If the output of the hot water detection means that detects hot water is input to the control means, and hot water is detected before the first heating start time is counted, the time setting means adjusts the first heating start time. The electric water heater according to claim 1, comprising: (4) The time comparison means is configured to drive the drive means immediately when the first heating start time is set to a time longer than the time measured by the time measurement means. The electric water heater according to any one of 2 or 3. (5) It is equipped with a notification means that gives a notification by sound or light, and when the time comparison means detects boiling from the second heating start time before the set boiling end time, the notification means is turned on at that point. The electric water heater according to any one of claims 1, 2, 3, or 4. (6) The time comparison means is provided with a notification means for notifying by sound or light, and the time comparison means detects boiling when boiling is not detected from the second heating start time when the set boiling end time is reached. Claim 1 wherein the notification means is turned on.
, 2, 3 or 4.