JPH03113234A - Hot water feeder - Google Patents

Abstract

PURPOSE:To improve a convenience in use and reduce an energy consumption by a method wherein a time required for a water level within a water storing part and a hot water temperature to become their set values is stored at an operating time value by a control means, a control starting time is determined by a value equal to a specified value plus an operating time value in such a way as the water level in the water storing part and the hot water temperature become their set value at a set time. CONSTITUTION:A value equal to an operating time value plus a specified value is subtracted from a reservation time in advance in such a way as a hot water feeding to a water storing part 1 becomes the set water level and set temperature at a reserved time and then a control starting time is determined. The operating time value is a time ranging from a time in which a control means 13 starts to perform a controlling operation to a time in which the water level in the water storing part 1 and the hot water temperature become their set values. The water storing part 1 shows the set water level and the set temperature. A total time of a hot water feeding mode operation and a heating mode operation is calculated as an operating time value and stored and then this total time becomes one of several past data. In addition, it is heated to keep the set temperature until a bath taking time starts at S16 at the reserved time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic bath water supply device that supplies a set amount of hot water to a bathtub and circulates it to maintain the set temperature.

BACKGROUND OF THE INVENTION The system diagram of a conventional water heater of this type is the same as that shown in FIG. 2 of the present invention, so this will be used for explanation.

1 is a bathtub which is a water storage part, 2 is an adapter provided on the side of the bathtub 1, 3 is a water heater, and the adapter 2 and the water heater 3 are connected by an outgoing pipe 4 and a return pipe 5. There is. Connected to the outgoing pipe 4 are a pump 6 for circulating water in the water storage section 1 and for supplying hot water into the water storage section 1, and a heating means 7 for raising the temperature of the circulating water. Also connected to the return pipe 5 are water level detection means 8 for detecting the water level in the water storage section 1 and temperature detection means 9 for detecting the temperature of the circulating water. Further, a hot water supply source 10 is connected to a switching means 12 via a hot water supply pipe 11. The switching means 12 switches the connection of the outgoing pipe 4 to the return pipe 5 or the hot water supply pipe 11. Further, reference numeral 13 denotes a control means, which receives signals from the water level detection means 8 and temperature detection means 9 as input and determines each set value, and stores the memory in cooperation with the processor to control the pump 6. ,
It controls the heating means 7, the hot water supply source 10, and the switching means 12. Reference numeral 14 denotes an external input means for inputting a set time to the control means 13.

Next, a sequence diagram of the control means 13 in this water heater is shown in FIG.
, Step 3... and S2, S3...

The operation is started at S1, and the reserved time is inputted by the external input means 14 at S2. When the reservation time comes in S17, first 8
As shown in 5 to S7, the hot water supply source l is heated up to the set water level of the water storage part l.
Hot water is supplied from O. At this time, the hot water is supplied by the pump 6 from the hot water supply source 10 through the hot water supply pipe 11 and the switching means 12 to the outgoing pipe 4.
to be carried out.

When hot water is supplied to the set water level, the heating means 7 heats the hot water in the water storage section 1 until it reaches the set temperature, as shown in S8 to SIO. At this time, heating is performed by the pump 6 from the water storage section 1 through the return pipe 5 and the switching means 12 to the heating means 7, and the water is circulated through the outgoing pipe 4, the water storage section 1, and the pump 6. When heating is performed to the set temperature, as shown in 312 to S14, heating is performed to maintain the set temperature until the bathing starts at 318, and the bathing starts at 316.

In such a sequence, in order to start operation from the bath reservation time, the reservation time must be determined by subtracting the time until the water storage part 1 reaches the set water level and temperature from the time the user starts bathing. It is not convenient to use because the water storage part 1 does not reach the set water level and temperature, and the time it takes for the water storage part 1 to reach the set water level and temperature varies depending on the water temperature.
On the contrary, the water storage section 1 quickly reaches the set water level and temperature, and the heat retention mode becomes long, resulting in wasted energy.

As a means to solve such problems, a sequence as shown in FIG. 5 could easily be considered. When the operation is started at S1 and the reserved time is inputted by the external input means 14 at S2, the control start time is calculated at 319. This is done so that the water storage part l reaches the set water level and temperature at the reserved time.
The control start time is determined in advance by subtracting a certain amount of time from the reserved time. Then, when the control start time comes in S4, the hot water supply mode is switched on as in the sequence shown in Fig. 4.
It is operated in heating mode and heat retention mode, and when the reserved time comes in S15, the water storage section 1 reaches the set water level and temperature.

Problems to be Solved by the Invention However, in such a sequence, the time it takes for the water storage part 1 to reach the set water level and temperature may vary depending on the size of the water storage part 1, the water pressure at the setting location, the water temperature during operation, etc. Since the water storage part is large, the water pressure at the installation location is low, and the water temperature is low during operation, the time required for the water storage part 1 to reach the set water level and temperature is assumed and controlled by subtracting it from the reserved time. You have to decide the start time, Shitakatsu τ
, hot water supply mode from the control start time determined in this way,
When operating in heating mode and heat retention mode, there is a problem that if the water storage part 1 is small, the water pressure at the installation location is high, and the water temperature is high during operation, the heat retention mode is very long and energy is wasted. Ta.

The present invention solves the above-mentioned conventional problems, and the water level and hot water temperature in the water storage section reach the set values at the set time, making it easy to use.
The purpose is to reduce energy waste.

Means for Solving the Problems In order to solve the above problems, the water heater of the present invention stores the time required for the water level in the water storage section and the hot water temperature to reach the set value by the control means as an operating time value, and uses the external input means to The control start time of the control means is determined from the value obtained by adding a constant value to the operating time value so that the water level and hot water temperature in the water storage section reach the set values at the set time inputted by .

Function The present invention has the above structure, so that the operating time value is determined according to the size of the water storage section, the water pressure at the installation location, and the water temperature during operation, so that the water level and hot water temperature in the water storage section reach the set values at the set time. By determining the control start time of the control means from the value obtained by adding a constant value to the operating time value and the set time, it is easy to use (less energy is wasted).

Embodiment Hereinafter, an embodiment of the present invention will be explained based on FIG. 1 showing a sequence. The same steps as in Figures 4 and 5 include:
The same symbols are also given in FIG.

When the operation is started at S1 and the reserved time is inputted by the external input means 14 at S2, the control start time is calculated at S3. This means that hot water is supplied to water storage section 1 at the set water level at the reserved time.
The control start time is determined in advance by subtracting a value obtained by adding a constant value to the operating time value from the reserved time so that the set temperature is achieved.

Note that the constant value absorbs variations in the operating time value due to changes in water pressure and water temperature, and is set to, for example, 5 minutes in this embodiment. The operating time value is the time from when the control means 13 starts control until the water level and hot water temperature in the water storage section 1 reach the set values.

Considering that there may be some residual water in the water storage part from the previous time, there may be variations in the operating time values, so select the largest operating time value from the operating time values from the last time to several times in the past. The control start time may be determined by adding a constant value to this value.

Next, when the control start time comes at 84, hot water is first supplied from the hot water supply source IO up to the set water level of the water storage part l as shown in 35 to S7. It passes through the switching means 12 to the outgoing pipe 4. When hot water is supplied to the set water level, the heating means 7 heats the hot water in the water storage part 1 until the temperature reaches the set temperature, as shown in S8 to SIO. At this time, heating is carried out by the pump 6 from the water storage part l through the return pipe 5 and the switching means 12 to the heating means 7.
The water is circulated through the outgoing pipe 4, the water storage section 1, and the pump 6. Here, the water storage section 1 reaches the set water level and temperature, and the total time of hot water supply mode operation and heating mode operation of 35 to SIO is calculated and stored as an operation time value in Sll, and the past several times for the next operation are calculated and stored as an operation time value. Furthermore, as shown in S12 to S]4, the bath is heated to maintain the set temperature until the reserved time is reached in S15 and bathing starts in 316.

According to the configuration of the above embodiment, the size of the water storage section and the water pressure at the installation location are approximately constant, and the water temperature during operation is considered to be approximately the same as the water temperature during the past several operations. The operating time value is determined according to the size, water pressure at the installation location, and water temperature during operation, and the value is determined by adding a fixed value to the operating time value so that the water level and hot water temperature in the water storage part reach the set value at the set time. By determining the control start time from and the set time,
The time required for heat retention mode operation is shortened, and the water level and hot water temperature in the water storage section reach the set values at the set time, resulting in ease of use and less energy wastage.

Effects of the Invention As described above, in the water heater of the present invention, the operating time value is determined according to the size of the water storage part, the water pressure at the installation location, and the water temperature during operation, and the water level and hot water temperature in the water storage part are adjusted at the set time. By determining the control start time of the control means from the set time and the value obtained by adding a fixed value to the operating time value so as to reach the set value, it has the effect of being easy to use and reducing energy waste. be.

[Brief explanation of drawings]

FIG. 1 is a sequence diagram of a control means of a water heater according to an embodiment of the present invention, FIG. 2 is a system diagram of a water heater to which the present invention is applied, and FIG. 3 is a block diagram of a control means in the same apparatus. 4 and 5 are sequence diagrams of conventional control means. 1... Water storage section, 7... Heating means, 8.
... Water level detection means, 9 ... Temperature detection means, 1o ... Hot water supply source, 13 ... Control means, 14 ... External input means .

Claims (1)

[Claims] A water storage unit, a hot water source that supplies hot water to the water storage unit, a heating unit that heats the circulating water in the water storage unit, a water level detection unit that detects the water level in the water storage unit, and a temperature of the circulating water in the water storage unit. A temperature detecting means, a control means for controlling the hot water source and the heating means based on input signals of the water level detecting means and the temperature detecting means, and an external input means for inputting a set time to the control means, The means stores the time until the water level and hot water temperature in the water storage section reach the set values as an operating time value, and the water level and hot water temperature in the water storage section reach the set values at the set time input by the external input means. In the water heater, the control start time of the control means is determined based on a value obtained by adding a constant value to the operation time value.