JPH0345049Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention uses hot water supplied from a hot water heat source installed on the walls of kitchens, bathrooms, etc. The present invention relates to a hot water supply device that discharges hot water.

(Prior art) In a conventional water heater of this type, as shown in Japanese Patent Application Laid-open No. 61-130684, for example, when a fixed amount water stop switch is operated to supply a preset amount of hot water, the system automatically shuts down. It is known what made it so.

In addition, as shown in Japanese Patent Application Laid-Open No. 61-66026, etc., a flow rate detector and a flow rate regulator are provided in the hot water supply flow path, and the flow rate regulator is controlled and set by the instantaneous flow rate of the flow rate detector. In addition to adjusting the instantaneous flow rate,
A device is known in which water is stopped when the cumulative flow rate of a flow rate detector reaches a set value.

(Problem to be solved by the invention) However, the former method is extremely inconvenient to use because the instantaneous flow rate cannot be adjusted.
In the latter case, there is room for improvement in that the instantaneous flow rate is controlled to a set value even when a fixed amount of water is stopped.

In other words, under normal usage conditions, it is rare to use hot water at the maximum flow rate (instantaneous flow rate) (especially when using a large water heater), so the instantaneous flow rate can be set appropriately. However, the fixed-rate water stop function is mainly used when filling the bathtub with hot water, and in this case as well, the instantaneous flow rate is throttled, just as in normal hot water supply, and the time required to fill the bathtub with hot water becomes longer. There was a problem.
Furthermore, it is troublesome and inconvenient to change the instantaneous flow rate setting each time.

The present invention aims to solve the above-mentioned conventional problems and to provide a water heater that can supply hot water at a set cumulative flow rate in the shortest possible time without unnecessarily restricting the instantaneous flow rate when fixed water is stopped.

(Means for Solving the Problems) In order to achieve the above object, the water heater of the present invention has the following configuration. In other words, a flow rate detector and a flow rate regulator installed in the hot water supply flow path, a quantitative water stop switch, and a flow rate controller that usually displays the instantaneous flow rate setting value and displays the integrated flow rate setting value when the quantitative water stop switch is turned on. An operation section that normally has a display section, a flow rate setting switch that sets the instantaneous flow rate and sets the integrated flow rate when the metering water stop switch is turned on, and a control section that usually has a set value of the instantaneous flow rate and the instantaneous flow rate of the flow rate detector. A controller is provided which controls the flow rate regulator based on the flow rate and controls the flow rate regulator to the maximum flow rate when the quantitative water stop switch is turned on.

(Function) During normal hot water supply, the set value of the instantaneous flow rate is displayed on the flow rate display section, and this set value can be varied by operating the flow rate setting switch. The flow rate regulator is controlled based on this set value and the instantaneous flow rate of the flow rate detector,
Hot water is supplied at the set instantaneous flow rate.

When the quantitative water stop switch is turned on, the flow rate display section displays the set value of the cumulative flow rate, and the set value of the cumulative flow rate can be varied by operating the flow rate setting switch. When the quantitative water stop switch is turned on, the flow rate regulator is controlled to the maximum flow rate, and when the cumulative flow rate detected by the flow rate detector reaches the set value, hot water supply is automatically stopped.

(Example) An example of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, in which 1 is the main body of a water heater, which has a built-in thermomixing valve 2 that uses a thermowax and is equipped with a drive device consisting of a servo motor and a potentiometer. ing. A hot water supply path 3 and a water supply path 4 are connected to the mixing valve 2, and the mixed hot water is discharged from a flexible pipe 6 through a hot water supply path 5. The hot water supply channel 5
is provided with a solenoid valve 7, a flow rate detector 8, a temperature detector 9, and an electric flow rate regulator 10. Reference numeral 11 denotes an operation unit, which includes a power switch 12, a hot water supply switch 13,
It is equipped with a temperature display section 14, a temperature setting switch 15, a flow rate display section 16, a flow rate setting switch 17, a quantitative water stop switch 18, and an integration display switch 19.
A controller 20 controls the mixing valve 2, the electromagnetic valve 7, and the flow rate regulator 10 based on signals from the operating section 11.

Turn on the power switch 12, press and operate the temperature setting switch 15, set the temperature while looking at the set value displayed on the temperature display section 14, and set the instantaneous flow rate displayed on the flow rate display section with the flow rate setting switch. Determine by the operation in step 17. By this setting operation, the mixing valve 2 and the flow rate regulator 10 are driven to predetermined positions, and when the hot water supply switch 13 is then turned on, the electromagnetic valve 7 is opened and hot water is supplied at the set temperature and the set flow rate. The controller 20 performs feedback control on the flow rate regulator 10 and the mixing valve 2 based on the instantaneous flow rate and hot water temperature detected by the flow rate detector 8 and temperature detector 9, respectively.

Further, the flow rate detector 8 detects the cumulative flow rate after the power switch 12 is turned on, and the cumulative flow rate is detected by the cumulative flow rate detector 8.
When the power is turned on, the flow rate display section 16 displays the total accumulated flow rate of hot water supply after the power is turned on. This allows you to know the total amount of hot water used and helps you save water.

To perform a quantitative water cutoff, the fixed quantity water cutoff switch 18 is turned on. By turning on the quantitative water cut-off switch 18, the flow rate display section 16 displays the integrated set flow rate, and the flow rate setting switch 17 allows the set value to be varied. After setting, when the hot water supply switch 13 is turned on, the solenoid valve 7 is opened and the flow rate detected by the flow rate detector 8 starts to be calculated. When the quantitative water stop switch 18 is turned on, the cumulative flow rate after the quantitative water stop switch 18 is turned on is displayed on the flow rate display section 16 by turning on the integration display switch 19. Further, when the quantitative water stop switch 18 is turned on, the flow rate regulator 10 is controlled to the maximum flow rate, thereby shortening the hot water supply time. When the cumulative flow rate reaches the set value, the electromagnetic valve 7 is closed, the quantitative water stop switch 18 is turned off, the normal hot water supply mode is returned to, and the flow rate display section 16 is switched to an instantaneous flow rate display mode.

(Effects of the invention) The water heater of the invention has the following excellent effects. In other words, during normal hot water supply, the instantaneous flow rate set value displayed on the flow rate display section is varied using the flow rate setting switch, and when the quantitative water stop switch is turned on, the display on the flow rate display section switches to the integrated flow rate set value. The operation is simple, as it is only necessary to set the integrated flow rate using the flow rate setting switch. Furthermore, since the instantaneous flow rate becomes the maximum flow rate when the quantitative water stop switch is turned on, the time required to supply hot water at the set cumulative flow rate can be shortened.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. 1...Body, 2...Mixing valve, 5...
Hot water supply flow path, 7...Solenoid valve, 8...Flow rate detector, 1
0...Flow rate regulator, 11...Operation unit, 12...Power switch, 13...Hot water supply switch, 16...Flow rate display section, 17...Flow rate setting switch, 18...
Quantitative water stop switch, 19... Integration display switch,
20...Controller.

Claims (1)

[Scope of utility model registration request] A flow rate detector and a flow rate regulator installed in the hot water supply flow path, a quantitative water stop switch, and a flow rate display section that normally displays the instantaneous flow rate setting value and displays the integrated flow rate setting value when the quantitative water stop switch is turned on. and a flow rate setting switch that usually sets the instantaneous flow rate and sets the integrated flow rate when the metering water cut-off switch is turned on, and the control unit that normally sets the instantaneous flow rate based on the instantaneous flow rate setting value and the instantaneous flow rate of the flow rate detector. A water heater that controls a flow rate regulator and controls the flow rate regulator to a maximum flow rate when a quantitative water stop switch is turned on.