JPH0316536A - Electric water heater - Google Patents

Abstract

PURPOSE:To set a discharge amount from an electric water heater and to easily handle it by discharging the amount of water stored by a discharge water amount storing means through the control of a discharging means by a control means with only application of a signal from an input means by a user. CONSTITUTION:A tank 11 containing water or hot water is heated or heat retained by a heating means 12. The temperature of water or hot water in the tank 11 is detected by a temperature detecting means 13. A heating control means 14 receives the signal of the means 13 and controls the output of the means 12. Further, the water or the hot water in the tank 11 is discharged by a discharging means 15. A discharge water amount storing means 16 stores a fixed amount of discharge water. A charging means 17 changes the water discharge amount stores by the means 16. An input means 18 externally applies a signal where the discharge water amount stored by the means 16 is discharged. Then, where the input signal of the means 18 is received, a control means 19 controls the discharging means 15 to discharge the discharge water amount stored by the means 16.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an electric water heater.

BACKGROUND OF THE INVENTION FIG. 4 shows a block diagram of an example of a conventional electric water heater. In the figure, l is a container for holding water or hot water, 2 is a heating means for heating and keeping the container 1 warm, 3 is a temperature detection means for detecting the temperature of the water or hot water in the container 1, and 4 is a temperature detection means 3 5 is a heating control means which receives a signal and controls the output of the heating stage 2, and a discharge means 5 which discharges water or hot water from the container 1.

In conventional electric water heaters, the user himself/herself adjusts the discharge means 5 to determine the amount of water to be discharged.

Problems to be Solved by the Invention In such conventional electric water heaters, a certain amount of water (for example, 20
When discharging 0 cc), the user himself had to adjust the discharging means to dispense water or hot water from the container and determine the amount of water to be discharged while measuring with a measuring cup or the like.

Also, if you use many cups with different capacities to make multiple cups of coffee or tea (for example, 4 cups of 160cc cups and 6 cups of 200cc cups), the user can adjust the amount of water according to the capacity of each cup. It was necessary to repeatedly adjust the dispensing means for the number of cups to dispense.

In view of the above problems, it is an object of the present invention to make it possible to set the amount of water discharged from an electric water heater and to improve usability for users.

Means for Solving the Problems In order to achieve the above objects, the electric water heater of the present invention has the following features:
A discharge water volume storage means for storing a constant volume of discharge water, a changing means for changing the volume of discharge water stored in the discharge water volume storage means, and a signal from the outside when discharging the volume of discharge water stored in the discharge water volume storage means. and a control means for controlling the discharge means to discharge the discharge amount stored in the discharge water amount storage means when the input signal from the input means is received.

Effect With the above configuration, the control means controls the discharging means to discharge the amount of water stored in the discharging water amount storage means when the user simply inputs a signal from the input means. Dispensing can be performed without the need to dispense water or hot water and measure it with a measuring cup or the like to determine the amount of water to be dispensed.

Further, since the user can change the amount of water stored in the discharge water amount storage means using the changing means, it is easy to discharge a water amount other than the amount stored in advance in the discharge water amount storage means.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is a block diagram of an embodiment of the electric water heater of the present invention, and FIG. 2 is a circuit diagram of the embodiment.

In Fig. 1, 11 is a container for storing water or hot water, 12
is a heating means for heating and keeping the container 11 warm, such as a heater or a heating coil that performs induction heating. 13 is a temperature detection means for detecting the temperature of water or hot water in the container 11; 14 is a heating control means for receiving a signal from the temperature detection means 13 and controlling the output of the heating stage 12; 15 is a container 1;
This discharge means is composed of a motor 15a and a pump 15b (in this embodiment, 40 cc is discharged per second) which discharges a constant amount of water.

16 is a roughly constant amount of discharged water (in this example, 2'
OOcc); l7 is a changing means for changing the discharge water volume stored in the discharge water volume memory 16; and 18 is a change means for changing the discharge water volume stored in the discharge water volume storage means 16. An input means 19 for giving a signal from the outside is a control means that controls the discharge stage 15 to discharge the discharge water amount stored in the discharge water volume storage stage 16 when a human input signal from the input means 18 is received.

In FIG. 2, 2l is a microcomputer,
CPU. It consists of RAM, ROM, and input/output ports.

12 is a heating means for heating the container 11, and 15a is a motor for discharging water or hot water in the container 11, each of which is connected in series with a bidirectional thyristor 24, 25, and further connected in series with an AC power source 26. ing.

27 is a transistor whose collector is connected to the gate of the bidirectional thyristor 24 via a resistor 28, and whose emitter is connected to the LO of the circuit.
The bases are connected to the output ports of the microcomputer 21 at the W level.

29 is a transistor whose collector is connected to the gate of the bidirectional thyristor 25 via a resistor 30, and whose emitter is connected to the LO of the circuit.
The bases are connected to the output ports of the microcomputer 21 at the W level.

The changing means 17 includes an input switch 32.33 and a resistor 34.3.
5, which is connected to the input port of the microcomputer 21, and when the human switch 32 or 33 is pressed, the microcomputer 21 receives a HIGH level, and when it is not pressed, it outputs a LOW level through the resistors 34 and 35. Each level is entered.

31 is an LCD, which displays the amount of water stored in the discharged water amount memory 16.

The input means 18 is composed of a human power switch 36 and a resistor 37, and is connected to the input port of the microcomputer 21. When the input switch 36 is pressed, a HIGH level is transmitted to the microcomputer 21, and when it is not pressed, a HIGH level is transmitted to the microcomputer 21. The LOW level is manually controlled.

38 is a manual switch, and the microcomputer 21
When the input switch 38 is pressed, a HIGH level is input to the microcomputer 21, and when the input switch 38 is not pressed, a LOW level is inputted to the microcomputer 21 via a resistor 39.

The temperature detection stage 13 includes a thermistor 40 whose resistance value decreases as the temperature inside the container 11 changes from low to high temperature.
, a resistor 41 connected in series with the thermistor 40, and an A/D converter 42 which inputs the voltage divided by the thermistor 40 and the resistor 41 and whose output is connected to the input port of the microcomputer 21. The microcomputer 21 outputs an output corresponding to the temperature inside the container 1L.

44 is a DC power supply, which is the power supply for the circuit described above.

FIG. 3 is a flowchart of the program of the embodiment stored in the ROM of the microcomputer 21, and the operation of the embodiment will be explained based on this flowchart.

In step 71, the discharge water amount of 200 cc stored in the discharge storage means 16 is displayed on the LCD 31, which is the display means, and the process proceeds to step 72.

In step 72, the temperature detection stage 13 detects the temperature of the container 1l, and in step 73, it is determined whether the temperature is high or low based on the signal input from the A/D converter 42.

If it is determined that the temperature is low in step 73, the process proceeds to step 74, where a HIGH level is output to the transistor 27, the transistor 27 is turned on, and a current is passed through the resistor 28 to the gate of the bidirectional thyristor 24, thereby making the bidirectional thyristor 24 conductive and heating it. Turn on 1000 steps 12.

If it is determined that the temperature is high in step 73, the process proceeds to step 75, where a LOW level is output to the transistor 27, the transistor 27 is turned off, the current is stopped flowing to the gate of the bidirectional thyristor 24, the conduction of the bidirectional thyristor 24 is eliminated, and the heating is stopped. Turn off stage 12.

Next, the process proceeds to step 76, where the signal of the input port to which the manual switch 32 and the manual switch 33 are connected is determined.
If the manual switch 32 or input switch 33 is pressed and the input port signal is at HIGH level, step 7
If the input switch 32 or input switch 33 is not pressed and the signal of the human power port is at the LOW level, the process proceeds to step 78.

In step 77, input switch 32 and input switch 3
3 determines the signal of the input boat connected to it, and determines whether the pressed switch is the manual switch 32 or the input switch 33.
If it is the input switch 32, the process proceeds to step 79, and if it is the manual switch 32, the process proceeds to step 80.

In step 79, 20cc is subtracted from the discharged water volume of 200cc stored in the discharged water volume memory 16 by the number of times the input switch 32 is pressed, and then stored in the discharged water volume storage means 16, and the process proceeds to step 78. .

In step 80, 20○ is input to switch 3 to 200cc, which is the discharged water volume stored in the discharged water volume storage means l6.
Discharge water amount storage means 1 after the number of times 2 is pressed
6, and proceed to step 78.

In step 78, the discharge storage means re-displays the newly memorized discharge water amount on the LCD, which is the display means, and the process proceeds to step 81.

In step 8l, the manual switch 36 and the input switch 38
determines the signal of the input port to which it is connected, and if the input switch 36 or the manual switch 38 is pressed and the input port signal is HIGH level, the process proceeds to step 82, and if the manual switch 36 or the input switch 38 is pressed If the signal on the input port is at LOW level, the process advances to step 83 and the next step is performed.

In step 82, input switch 36 and input switch 3
8 determines the signal of the connected input boat, and the pressed switch is input switch 36 or input switch 38.
If the input switch is the input switch 38, the process proceeds to step 84, and if the input switch is the input switch 36, the process proceeds to step 85.

If the process proceeds to step 84, the transistor 29 is set to HIGH.
It outputs an H level, turns on the transistor 29, and flows a current to the gate of the bidirectional thyristor 25 through the resistor 30, making the bidirectional thyristor 25 conductive and turning the motor 15a on.
N, the discharge is started, and the process proceeds to step 86.

In step 86, the signal of the input port to which the input switch 38 is connected is determined, and if the input switch 38 is pressed and the signal of the input port is HIGH level, the process does not proceed beyond step 79, and the input switch 38 is pressed. Step 8 only if the input port signal is LOW level.
Proceed to step 7.

When proceeding from step 81 to step 85, a HIGH level is output to the transistor 29, and the transistor 29
is turned on, a current is caused to flow through the gate of the bidirectional thyristor 25 via the resistor 30, the bidirectional thyristor 25 is made conductive, the motor 15a is turned on, and discharge is started, and the process proceeds to step 88.

In step 88, in order to discharge the discharge amount stored in the discharge water amount storage means 16 using a pump that discharges 40 seconds per second, for example, if the stored water amount is 200 cc, the pump discharges 40 seconds per second.
seconds, 2 seconds for 80cc, 1 for 400cc
Wait 0 seconds and proceed to step 87.

Proceeding to step 87, a LOW level is output to the transistor 29, the transistor 29 is turned off, the current is stopped flowing to the gate of the bidirectional thyristor 25, the conduction of the bidirectional thyristor 25 is eliminated, the motor 15a is turned off, and the discharge is completed. Then, the process proceeds to step 83 to proceed to the next process.

Effects of the Invention As is clear from the above description of the embodiments, when dispensing a constant amount of water to add instant soup or milk, the dispensing water amount storage means stores the stored amount of water simply by the user giving a signal from the input means. Since the control means controls the discharge means and discharges water, the user does not have to adjust the discharge means himself to dispense water or hot water from the container and determine the amount of water to be discharged by measuring with a measuring cup or the like. It can be carried out.

Further, since the user can change the amount of water stored in the discharge water amount storage means using the changing means, it is easy to discharge a water amount other than the amount stored in advance in the discharge water amount storage means.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the electric water heater of the present invention, Fig. 2 is a circuit diagram of the embodiment, Fig. 3 is a program flowchart of the embodiment, and Fig. 4 is a block diagram of a conventional electric water heater. It is a diagram. 11... Container, 12... Heating means, 1
3...Temperature detection means, l4...Heating control means, l5...Discharge means, 16...
Discharged water amount storage means, 17... Changing means, 18.
...Input means, 19...Control means.

Claims (1)

[Claims] A container for holding water or hot water, a heating means for heating and keeping the container warm, a temperature detecting means for detecting the temperature of the water or hot water in the container, and a heating means for receiving a signal from the temperature detecting means. A heating control means for controlling output, a discharge means for discharging water or hot water from the container, a discharge water amount storage means for storing a constant amount of discharged water, and a means for changing the amount of discharged water stored in the discharged water amount storage means. an input means for giving a signal from the outside when discharging the amount of water stored in the amount of water stored in the amount of water stored in the amount of water stored in the amount of water stored; An electric water heater comprising a control means for controlling the amount of water to be discharged by the discharge means.