JP2516475Y2 - Display device of hot water storage type electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a display device of a hot water storage type electric water heater for manually setting and displaying a set value of a set temperature or a set amount of hot water.

[Prior Art] Most of hot water storage type electric water heaters currently on sale can set the boiling water temperature or the amount of water by manual operation and automatic operation. The amount of hot water used is set manually or automatically in a water heater that uses the amount of hot water setting method, and the boiling temperature is set without setting the amount of hot water used. Or set the boiling temperature automatically. In the conventional water heater, the set value is displayed only by manual setting using a light emitting display means such as an LED, and the set value by automatic setting is not displayed. Generally, in automatic setting, based on the amount of remaining hot water detected by a temperature sensor, etc., water temperature, hot water temperature, usage pattern for the past few days, etc. However, the electric heater is controlled based on the calculation result.

[Problems to be solved by the invention] Conventionally, it is considered that it is not necessary to display the automatic set value during the automatic driving because the automatic driving is performed. However, when the automatic operation is actually performed, there is a case where it is desired to know the automatic set value during the automatic operation regardless of whether the used hot water amount setting method or the boiling temperature setting method is adopted. For example, if it is known in advance that more hot water will be used on the next day than it was on the previous day, it was not possible to determine the automatic setting value in the past, so it is determined whether the automatic setting value set in automatic operation is suitable for the planned usage amount. However, even if the automatic setting value is sufficient, the manual setting must always be switched to cope with the problem.

However, frequent switching to the manual setting causes the following problems. For example, when performing automatic driving that determines the automatic set value by referring to the lifestyle pattern of the past few days, switching to the manual setting generally resets the past data, so that unnecessary manual setting It was necessary to avoid switching as much as possible. Further, as the chances of switching to the manual setting increase, the possibility of forgetting the return operation to the automatic operation increases, and thus the switching to the manual operation has been a cause of lowering the operation efficiency of the hot water storage electric water heater.

An object of the present invention is to provide a display device of a hot water storage type electric water heater capable of solving the problems of the above conventional device.

[Means for Solving the Problems] In the present invention, a hot water storage type having a manual setting unit for manually setting a set temperature or a set amount of hot water, and a display unit for displaying a set value set by the manual setting unit In the display device of the electric water heater, the automatic set value at the time of automatic operation is displayed on the display unit.

[Advantage of Invention] According to the present invention, since the automatic set value is displayed on the display unit, the automatic set value can be confirmed during the automatic operation.
Therefore, it is possible to avoid the unnecessary switching to the manual setting, which is performed because the automatic setting value is not displayed as in the prior art. Therefore, it is possible to prevent problems such as past data being reset due to switching to the manual setting, and forgetting the switching operation to the automatic driving to reduce the driving efficiency. Further, according to the present invention, since the manually set value display portion is also used as the automatic set value display portion, the number of display elements can be reduced, and the display device can be manufactured compactly and inexpensively.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the constitution of an embodiment of the present invention, and FIG. 2 shows the constitution of an example of a display panel in which a setting unit and a display unit are provided together. Note that this display panel is a panel used in a boiling water temperature setting type water heater. The setting unit 1 is equipped with a slide type variable resistor or a switching contact as an input means, and by changing the position of the slider 1a, it is possible to switch between automatic operation and manual setting and to issue a selection command for a manual setting value. It is configured. The setting unit 1 can be configured by using a dial type switch, a push button switch, or the like as an input unit, but by using one slider as in the present embodiment, setting mistakes can be prevented. In addition, the display panel can be made compact. The display unit 2 is composed of nine light emitting diodes 2a vertically arranged along the moving groove 1b of the slider 1a of the setting unit 1. The display means is not limited to the light emitting diode, and it goes without saying that other known display means can be used.

For manual setting, move the slider 1a to the display position of the desired temperature. By doing so, an analog signal corresponding to the set temperature is output from the circuit section of the setting section (not shown), the analog signal is converted into a drive signal of a digital signal through the first A / D conversion circuit 3, and then the drive circuit. 4 is input. The drive circuit 4 discriminates the input drive signal and outputs a signal for causing the predetermined light emitting diode 2a of the display unit 2 to emit light, and the slider 1a in FIG. 2 is arranged at the "automatic" position. At the same time, the automatic operation signal output from the setting unit 1 and converted into a digital signal by the A / D conversion circuit 3 is discriminated and the arithmetic means is instructed to start arithmetic operation. It should be noted that the light emitting mode of the light emitting diode 2a is arbitrary, and only the light emitting diode corresponding to the set temperature may emit light,
You may make it light-emit all the light emitting diodes corresponding to the temperature below set temperature.

When the slider 1a is placed at the "automatic" position in the automatic operation, the drive circuit 4 gives the operation start command to the operation means 5 to start the automatic operation as described above. The calculation means 5 calculates the boiling temperature by inputting the data of the residual hot water amount, the water temperature, and the residual hot water temperature converted into digital values by the second A / D conversion circuit 6. The calculation means 5 is used for automatic control of the water heater, and is normally arranged in the control device of the electric heater of the water heater. The detection unit 7 is composed of a known sensor such as a temperature sensor, and detects data necessary for controlling the amount of remaining hot water, the water temperature, the remaining hot water temperature, and the like.

The automatic set value calculated by the calculation means 5 is converted into a drive signal by the drive signal conversion means 8 and input to the drive circuit 4. In the drive signal conversion means 8, rounding up or rounding down of the automatic set value and processing for outputting a drive signal according to the light emitting mode of the light emitting diode are performed. In this embodiment, since the light emitting diode is used, the temperature can be displayed only in stages. Therefore, in this embodiment, for example, when the automatic setting value is 73 ° C., the rounding down process is performed to determine 70 ° C., and the drive signal necessary for causing the light emitting diode corresponding to 70 ° C. to emit light is output. ing. The round-up or round-down processing standard in the drive signal conversion means 8 is
It may be arbitrarily determined according to the number of light emitting diodes and the light emitting mode, and when the automatic set value is 73 ° C., rounding up processing can be performed to display 75 ° C.

The drive signal converting means 8 does not perform rounding up or rounding down. For example, when the automatic set value is 73 ° C, the temperature is 70 ° C.
Both the light emitting diode corresponding to 75 degrees Celsius is made to emit light,
It may be possible to display that the automatic set value is between 70 ° C and 75 ° C.

As indicated by the broken line in FIG. 1, the second A / D conversion circuit 6
It is also possible to directly input the output of the above into the drive signal converting means 8 and display the actual detection value measured by the detecting portion 7 on the display portion 2.

In the present embodiment, when the operation mode is switched to the automatic operation, the automatic set value can be displayed stepwise on the display unit 2 that displays the manually set temperature. Therefore, when a large amount of hot water is used on the next day, it is possible to judge whether or not there is a margin by looking at the automatic setting value displayed on the display unit 2 and prevent unnecessarily switching to the manual setting. it can. Therefore, automatic driving can be effectively used.

In this embodiment, since the display unit for the manually set value is also used as the display unit for the automatic set value, the number of display elements can be reduced, and the advantage that the display device can be manufactured compactly and inexpensively is provided. is there.

The above embodiment is an example in which the present invention is applied to the boiling temperature setting method, but it goes without saying that the present invention can also be applied to the hot water amount setting method.

[Advantage of Invention] According to the present invention, since the automatic set value is displayed on the display unit, it is possible to confirm the automatic set value during the automatic operation, and the automatic set value is not displayed unlike the conventional case. It is possible to avoid the unnecessary switching to the manual setting which has been performed.
Therefore, there is an advantage that it is possible to prevent problems such as past data being reset due to switching to the manual setting, and forgetting the switching operation to the automatic operation and lowering operating efficiency. Further, according to the present invention, since the display unit for the manually set value is also used as the display unit for the automatic set value, the number of display elements can be reduced, and the display device can be manufactured compactly and inexpensively. There is.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a display panel. DESCRIPTION OF SYMBOLS 1 ... Setting part, 2 ... Display part, 3,6 ... A / D conversion circuit, 4 ... Drive circuit, 5 ... Arithmetic means, 7 ... Detection part, 8 ... Drive signal conversion means.

Claims (1)

(57) [Scope of utility model registration request] 1. A display device for a hot water storage electric water heater comprising a manual setting unit for manually setting a set temperature or a set amount of hot water, and a display unit for displaying a set value set by the manual setting unit. A display device of a hot water storage type electric water heater, wherein an automatic set value during automatic operation is displayed on the display unit.