JPS60232451A - Controller of hot water reserving type electric water heater - Google Patents

Abstract

PURPOSE:To obtain a controller of a hot water reserving type electric water heater preventing heat loss through the remainder of the water from occurring and eliminating troublesomeness in handling of the titled heater for a user, by controlling automatically a quantity of electrification to a heating unit based on a bathing pattern. CONSTITUTION:A setting switch 1 can set selectively, for example, either ''bathing daily'' or ''not bathing on the next day of bathing'' and a set signal is sent to a microcomputer 4. The microcomputer 4 receives a detected signal from a flowmeter 3 of supply water and decides whether there had the bathing or not. A comparison part 9 receives the detected signal from a hot water temperature sensor 2, the value of which is compared for a predetermined period of time and the minimum value is applied to a necessary calorific value correcting part 10. The necessary calorific value correcting part 10 is a device indicating boiling up capacity (calorific value) of the next day, and if the appointed day is one having the bathing at the time of a bathing pattern of ''not bathing on the next day of bathing'', the part 10 instructs an operating part 11 so that the heating up capacity for the next day becomes small. A control part 12 receives operational result from the operating part 11 and electrification to a heater 5 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a hot water storage type electric water heater that controls boiling according to a bathing pattern.

(Conventional technology) In conventional hot water storage type electric water heaters that use late-night electricity, the amount of hot water used (amount of hot water used) varies from day to day.

In particular, whether or not a person takes a bath has a large effect on the amount of hot water used.

For example, on days when you do not take a bath, more than half of the hot water storage tank capacity will remain. In this case, the hot water at an unnecessarily high temperature is not used for a long time and is left unused, resulting in extremely large heat loss due to heat radiation from the hot water storage tank and the like, resulting in an uneconomical problem.

In this regard, it is equipped with a constant hot water amount setting means for setting the constant amount of hot water used and a provisional hot water amount setting means for setting the amount of hot water used only once. A system has been proposed in which the difference in the amount of heat required can be corrected only on the next day after the set date (for example, see Japanese Patent Laid-Open No. 1241'44/1983).

However, even in such a configuration! The fixed hot water amount setting means can only be set in advance for the next day, and the next day the operation returns to a constant hot water amount.

For example, in families where there is a habit of taking a bath every other day.

It was necessary to set the temporary hot water amount setting means every other day.

(Object of the invention) The present invention has been made in view of such conventional problems, and
A storage type electric hot water system that automatically controls the amount of electricity supplied to the two heating elements based on the user's bathing pattern, thereby preventing heat loss due to residual hot water and eliminating the user's troublesome operations. The purpose of this invention is to provide a control device for a device.

(Configuration of the Invention) As shown in FIG. 1, the control device of the present invention includes a setting means a.
The bathing pattern set by 2 and the presence or absence of bathing on that day determined by the 2 determining means.

The information is input to the calculation means C, and the calculation means C calculates the next day's boiling capacity based on the information, and based on this calculation result, the amount of electricity applied to one heating element e is controlled by the control means d. It is something.

(Example) The configuration of the present invention will be described below with reference to two examples with reference to the drawings.

Figure 2 shows a control device for a hot water storage type electric water heater according to the present invention, and the control device includes a setting switch 1, a hot water temperature sensor 2, and a hot water temperature sensor 2.
．． Water supply flow meter 3. Microcomputer 4. It consists of heaters for late-night electricity, etc.

The setting switch 1 is used to set the user's bathing pattern.For example, (a) ``I take a bath every day.''
It is possible to selectively set one of the bathing patterns such as "not taking a bath the day after taking a bath", and a setting signal is sent to the microcomputer 4.

The hot water temperature sensor 2 detects the temperature of hot water in the hot water storage tank 6, and is provided at the lower part of the hot water storage tank 6.

The detection signal is sent to the microcomputer 4.

The water supply flow meter 3 detects the amount of water supplied into the hot water storage tank 6 and is provided at a midpoint in the water supply pipe 7, and sends a detection signal to the microcomputer 4.

The microcomputer 4 has a determining section 8. Comparison section 9゜Required heat amount correction section 10. It has a calculation section 11 and a control section 12. The determining unit 8 determines whether or not bathing will take place on that day.It receives the detection signal from the water supply flow meter 3, calculates the amount of hot water used based on the amount of water supplied to the hot water storage tank 6, and determines whether or not to take a bath based on the result. Determine whether or not there was. The comparison section 9 measures the minimum value of the hot water temperature in the hot water storage tank 6, and is connected to the hot water temperature sensor 2.
, and compares the values for a certain period of time to find the lowest value.The minimum value is regarded as the feed water temperature necessary for boiling control and is input to the required heat quantity correction section 10.\\. The required heat amount correction unit 10 receives a setting signal from the setting switch 1, a judgment signal from the judgment unit 8, and a signal indicating the water supply temperature obtained from the comparison unit 9, and instructs the boiling capacity (heat amount) for the next day. For example, in case of the bathing pattern (b) above, ``Do not bathe the day after bathing day'', if there is bathing on that day.

Instruct them to reduce the boiling capacity for the next day.

The calculation unit 11 receives the correction signal from the required heat amount correction unit 10, and calculates the necessary boiling temperature for the next day, as well as the necessary energization time to the heater 5.

Note that this calculation is performed using the following formula.

■・T=Q, ', T=Q/V T: Boiling temperature Q: Boiling capacity (heat amount) V: Hot water storage tank The customer control unit 12 controls the amount of electricity (time) of the heater 5, and calculates Receive the calculation results from section 11.

Controls energization to the heater 5.

Next, the operation of the control device is explained according to the procedure of the control program stored in the microcomputer 4, that is, the flowchart shown in FIG. Select one of the bathing patterns "Do not take a bath the day after the bathing day" using the setting switch 1. In step ■, above (b)
Determine whether the bathing pattern "Do not take a bath the day after the bathing day" has been selected or not. 3. If it is not selected and (a) "Take a bath every day" pattern is set, proceed to step ■ and automatically save 1 energization. Boiling is done based on operation.

On the other hand, when the bathing pattern (b) "Do not take a bath the day after the bathing day" is selected in step ■, in step ■,
The determination unit 8 determines whether or not you have taken a bath, and if you have taken a bath today, it is determined that you will not take a bath the next day, and step
Proceed. Step ■ is a step that instructs to reduce the boiling capacity, and is the standard residual water heat quantity Q max or x/y of the heat quantity of the amount of bathing water (constant).

Instruct boiling at the capacity minus the amount of heat equivalent to (X≦y) and move on to the next step, Step 7. The reference residual hot water ffl
Qmax is 2. For example, the residual heat of hot water that remains even on the day of taking a bath is used, and is set as a constant reference value. Step (2) is a step for controlling the boiling capacity for the next day after the reduction of the boiling capacity was instructed in step (2), and instructs boiling based on the normal automatic economizing operation executed in step (2).

On the other hand, it is determined in step (2) that the bath is not taking a bath, and the process moves to step (2), where the boiling water is heated based on the normal automatic economizing operation executed in step (2), and the process returns to step (2).

In the above-mentioned embodiment, the relationship between X and y used in step (3) is determined by accurately detecting the water supply temperature and the remaining heat value when the optimum automatic saving operation is selected.
It approaches x=y.

Further, in the above-described embodiment, whether or not a person has taken a bath on that day is determined by detecting the water supply flow rate of the water supply pipe 7, but this is not limited to this. for example.

In FIG. 2, a pressure sensor 14 is provided at the bottom of the bathtub 13, and whether or not the user is taking a bath is directly determined based on whether or not the user enters the bathtub 13. As shown in FIG.
and the residual hot water heat MQmax (constant).

It is possible to determine whether or not a person has taken a bath by comparing the heat value of the remaining hot water on that day. Note that FIG. 4 shows the above-mentioned (b) [
Figure 9 shows a specific example of the change in boiling capacity when a bathing pattern of ``Do not take a bath the day after the bathing day'' is selected. ) indicates that the person did not take a bath even though it was the scheduled bathing day, and in such a case, the next day's boiling capacity is controlled to be the same as the previous day's boiling capacity.

Furthermore, the control based on the set bathing pattern as described above is performed by, for example, determining the energization time of the previous bath.

It is also possible to set the system to automatic saving mode operation that does not detect the water supply water temperature, such as increasing the water supply water temperature by calculation.

In the above-described embodiment, two bathing patterns can be set, but the invention is not limited to this, and bathing patterns can be set for the next day and the day after the bathing day.

(Effects of the Invention) As detailed above, in the present invention, the amount of electricity applied to the heating element is controlled based on the user's preset bathing pattern. This is an extremely economical control device that eliminates the hassle of setting operations that previously existed, and reduces heat loss due to residual hot water.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention, FIGS. 2 to 4 illustrate embodiments of the present invention, FIG. 2 is a block diagram showing the configuration of a control device, and FIG. 3 is a block diagram of the same device. Flowchart 1 of the control program, FIG. 4 is a graph illustrating a change in boiling capacity when a pattern of "no bathing the day after the bathing day" is set. a... Setting means b... Judgment means C... Calculating means d... Control means ■... Setting switch 3... Water supply flow meter 4... Microcomputer 5... Heater 6. ...Hot water tank applicant: Tansui Chemical Industry Co., Ltd. Representative: Mototoshi Fujinuma Figure 2 Figure 3

Claims (1)

[Scope of Claims] l) Setting means for setting a bathing pattern in a hot water storage type electric water heater that uses late-night electricity. a determining means for determining whether or not to take a bath on that day; a calculating means for calculating a boiling capacity for the next day based on the determination result of the determining means and a bathing pattern set by the setting means; 1. A control device for a hot water storage type electric water heater, comprising: control means for controlling the amount of electricity supplied to a heating element based on the amount of electricity supplied to a heating element.