JPH11166764A - Bath water heater with hot water supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to supply hot water in an energy saving manner in a hot water supply unit for supplying hot water to a bathtub and the like. SOLUTION: In case a quantity of remaining hot water in a bathtub 17 is calculated to calculate a calorific value, and a calorific value of a set hot water quantity and a hot water temperature is calculated by a microcomputer of a control unit 27 to judge whether or not it is better to utilize the remaining hot water, a display thereof is displayed on a remote controller 29 (a bathtub water temperature setting device) by a display means 31 of the control unit 27 so as to show to a user a method of hot water supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant hot water supply apparatus for supplying hot water to a kitchen or a bathtub.

[0002]

2. Description of the Related Art FIG. 7 shows a configuration of a bath kettle with a gas water heater as an example of the prior art.

First, a hot water supply circuit will be described. In FIG. 7, water is supplied from a water inlet 1, absorbs heat in a water amount detecting device 2 and a hot water supply heat exchanger 3 as a heat exchange device, passes through a water amount control valve 4 as a water amount control device, and goes out of the hot water supply port 5 out of the machine. Hot water is supplied.

Gas is supplied from a gas inlet 6 and is heated by a hot water supply gas electromagnetic valve 7 and a hot water supply gas burner section 9 as a combustion device, and generates heat. Air required for combustion is supplied by a hot water supply / combustion blower 10 as an air supply device, and combustion exhaust gas generated by combustion is discharged from a hot water supply / exhaust port 11.

Further, a control device 12 for controlling each of the above devices is provided.
Each device is electrically connected.

Next, the bath circuit will be described. In FIG. 7, water is supplied from a water inlet 1, absorbs heat in a water amount detection device 2, a hot water supply heat exchanger 3, passes through a water amount control valve 4, a pouring electromagnetic valve 13, and a hopper 14 as a separation device. As a flow path, a reheating boiler 16 passing through the bath heat exchanger 15
Is supplied to the bath 17.

The other flow path is supplied from the hopper 14 to the bath 17 via a circulation pump 18 as a circulation device and a three-way valve 19, followed by a reheating 20.

Next, a circulation circuit of bath water will be described.
Bathtub water is circulated by the circulation pump 18 through the bath heat exchanger 15, the additional heating pipe 16, the additional heating return pipe 20, and the three-way valve 19. The gas is supplied from the gas inlet 6 and burns in the bath burner 23 through the bath gas solenoid valve 21 and the bath gas proportional valve 22 to generate heat.

The air required for combustion is a blower for bath combustion 24
Exhaust gas generated by the combustion supplied by the combustion is discharged from the bath exhaust port 25.

A control device 12 for controlling each of the above devices
Each device is electrically connected.

A remote controller 26 for setting the hot water supply temperature and the amount of hot water to be supplied to the bathtub is also electrically connected to the controller 12.

[0012]

In the above-described bath kettle with a water heater according to the prior art, if water remains in the bathtub 17, it is necessary to discharge the remaining water and supply new hot water.
The user has determined whether to use the remaining hot water to set the predetermined hot water volume and hot water temperature.

When an automatic hot water supply operation is performed when water remains in the bathtub 17, the hot water is supplied at a set hot water supply temperature until a predetermined hot water amount is reached. Hot water was circulated and heated to control to a predetermined temperature.

[0014] The reheating circuit has a lower thermal efficiency and consumes more energy than a hot water supply circuit due to a high incoming water temperature.

As described above, when water remains in the bathtub 17, it is only possible to judge from the experience of the user that the predetermined amount of hot water and the hot water temperature can be obtained with the greatest energy saving.

[0016]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention detects the amount of hot water remaining in a bathtub and the temperature thereof, calculates the amount of heat in the bathtub, and sets the set hot water temperature to the set hot water temperature. Calorie is calculated. Then, in consideration of the thermal efficiency of the hot water supply circuit and the thermal efficiency of the bath circuit, it is determined whether it is better to use the remaining hot water in the bathtub or to discharge the remaining hot water, and notify the user.

If it is better to use the remaining hot water,
The hot water is automatically supplied by judging how many times the hot water should be supplied in order to reach the set hot water temperature with the set hot water amount.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied as a concrete form by adopting the constitution described in each claim. That is, the invention according to claim 1 of the present invention comprises a water amount detecting device for detecting the water amount, a circulating device for circulating the water in the bathtub, a temperature detecting device for detecting the temperature of the circulating water, and setting the temperature of the bathtub water. Bath water temperature setting device to set, bath water amount setting device to set the amount of bath water, control device to control each device, remaining hot water detecting means for detecting remaining hot water in the bath, Calculating and using the remaining hot water is more economical, a supply method determining means for determining whether it is better to newly supply hot water, and the contents determined by the supply method determining means are displayed on the bathtub water temperature setting device. It is provided with a display means for causing the display.

In the above-mentioned structure, a fixed amount of water is supplied to the bathtub,
Heating is performed until a certain temperature is reached, and the amount of remaining hot water in the bathtub is calculated from the time taken, the amount of heat supplied, and the thermal efficiency.

Then, the calorie required to reach the set temperature of the set hot water amount is calculated. Since the bath tub supply temperature is supplied at the set temperature, the predetermined temperature may not be reached even when the set hot water amount is supplied. At this time, it is further heated in the bath circuit so as to reach the set temperature. Calculate this required amount of heat, compare the required amount of heat and the amount of heat when hot water is supplied when there is no water, and notify the user to drain the water and supply new hot water when the required amount of heat is large. It is.

Further, the invention according to claim 2 of the present invention provides
A water amount detection device that detects the amount of water, a circulation device that circulates water in the bathtub, and a temperature detection device that detects the temperature of the circulating water,
Bathtub water temperature setting device that sets the temperature of the bathtub water, bathtub water amount setting device that sets the amount of bathtub water, a control device that controls each of the above devices, and remaining hot water detection means that detects remaining hot water in the bathtub, The apparatus is provided with a supply temperature determining means for calculating the amount of heat of the remaining hot water and supplying hot water at the optimum supply temperature.

In the above-mentioned remaining hot water detecting means, when it is better to use the remaining hot water, the hot water supply temperature is adjusted so that the hot water is not required to be heated in the bath circuit, so that the predetermined hot water amount reaches a predetermined temperature. .

[0023] The invention according to claim 3 of the present invention provides:
A water amount detection device that detects the amount of water, a circulation device that circulates water in the bathtub, and a temperature detection device that detects the temperature of the circulating water,
Bathtub water temperature setting device for setting bathtub water temperature, bathtub water amount setting device for setting bathtub water amount, bathtub water drainage device provided in bathtub water circulation circuit, and control device for controlling each of the above devices And a residual hot water detecting means for detecting residual hot water in the bathtub;
A supply method determining means for calculating the amount of heat of the remaining hot water to determine whether it is more economical to use the remaining hot water or to supply new hot water; and A bathtub water draining device driving means for driving the draining device; and a display means for displaying the content determined by the supply method determining means on the bathtub water temperature setting device.

When it is determined by the above-mentioned remaining hot water detecting means that the remaining hot water is not used, the drainage device provided in the bathtub water circulation circuit is operated to automatically drain the remaining hotwater from the bathtub, and a new bathtub water is used. Supply.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those of the conventional example shown in FIG.

(Embodiment 1) FIG. 1 is a structural view of a bath kettle with a gas water heater according to one embodiment of the present invention.

First, the hot water supply circuit will be described. In FIG. 1, water is supplied from a water inlet 1 and absorbs heat by a water amount detecting device 2 and a hot water supply heat exchanger 3 as a heat exchange device, passes through a water amount control valve 4 as a water amount adjusting device, and goes out of the hot water supply port 5 out of the machine. Hot water is supplied.

The gas is supplied from a gas inlet 6 and is heated by a hot water supply gas solenoid valve 7 and a hot water supply burner 9 as a combustion device to generate heat by a hot water supply gas proportional valve 8 as a gas amount adjusting device. Air required for combustion is supplied by a hot water supply / combustion blower 10 as an air supply device, and combustion exhaust gas generated by combustion is discharged from a hot water supply / exhaust port 11.

Each device is electrically connected to a control device 27 for controlling each device. Next, the bath circuit will be described.

In FIG. 1, water is supplied from a water inlet 1, absorbs heat in a water amount detecting device 2, a hot water supply heat exchanger 3, passes through a water amount control valve 4, flows through a pouring solenoid valve 13, and passes through a hopper 14 in one direction. Is supplied to the bathtub 17 through the bath flow switch 28, the bath heat exchanger 15, and the reheating boiler 16.

The other flow path is supplied from a hopper 14 through a circulation pump 18 as a circulation device and a three-way valve 19 to a bathtub 17 through a reheating pipe 20.

Next, a circulation circuit of bath water will be described.
Bath water is supplied to the bath heat exchanger 15, the reheating pipe 16, the reheating pipe 20, the three-way valve 19 by the circulation pump 18,
Circulates through the bath flow switch 28.

The gas is supplied from the gas inlet 6 and burns in the bath burner 23 through the bath gas solenoid valve 21 and the bath gas proportional valve 22 to generate heat.

The air required for combustion is a bath combustion blower 24.
Exhaust gas generated by the combustion supplied by the combustion is discharged from the bath exhaust port 25.

A control device 27 for controlling each of the above devices
Each device is electrically connected.

A remote controller 29 for setting the hot water supply temperature and the amount of hot water to be supplied to the bathtub is also electrically connected to the control device 27.

Further, the control device 27 includes a supply method judging means 30 and a display means 31. Further, a bath thermistor 32 is attached as a temperature detecting device.

Referring to FIG. 2, the supply method determining means 30 and the display means 31 will be described. The automatic pouring switch on the remote controller 29 is turned on. In step 1, the pouring solenoid valve 13 is opened, and in step 2, water is supplied to the 10 L bath. When water is supplied in step 3, the circulation pump 18 operates to circulate the water in the bathtub, and the temperature of the circulating water is detected by the bath thermistor 32.

In step 4, the presence or absence of water in the bathtub can be determined by the operation of the bath flow switch 28. If it is determined in step 5 that there is water in the bathtub, a timer of a microcomputer (hereinafter referred to as a microcomputer) in the control device 27 is started.

Then, in step 6, the bath combustion blower 2
4. The bath gas solenoid valve 21 and the bath gas proportional valve 22 are operated to burn the bath burner 23 and raise the temperature of the circulating water.

Then, it is determined in step 7 whether the temperature has risen by 5 ° C., and in step 8, the time until the temperature rises by 5 ° C. is measured. Then, in step 9, the combustion of the bath burner section 23 is stopped.

The amount of heat given to the circulating water by the combustion of the bath burner 23 can be determined by the drive current of the bath gas proportional valve 22. The amount of residual hot water in the bathtub can be determined from the initial temperature of the circulating water and the time required to raise the circulating water by 5 ° C.

The remaining required amount of heat can be calculated from the set hot water amount and the set temperature set by the remote controller 29.

The supply temperature to the bathtub is supplied at the temperature set by the remote controller 29. When the supply amount reaches the set amount, the supply of hot water stops. The thermal efficiency at this time is about 80%
It is. When the supply of hot water is stopped, it is determined whether the temperature has reached a predetermined temperature. Until the temperature reaches the predetermined temperature, boiling is performed in a bath circuit. The thermal efficiency at this time is about 75%.

This condition is calculated by the microcomputer in step 10, and it is determined whether the remaining hot water is discharged and fresh hot water has less energy.

When the remaining hot water in step 11 is to be used, a difference in the current hot water amount from the set hot water amount is supplied in step 12.

If the remaining hot water is not used in step 13,
At step 14, the microcomputer displays a bathtub water discharge display on the remote controller 29.

If there is no bath water, at step 15, 10 L of hot water is poured at the set water volume. (Embodiment 2) FIG. 3 is a structural view of a bath kettle with a gas water heater according to a second embodiment of the present invention.

Only the differences from FIG. 1 will be described. Each device is electrically connected to a control device 33 that controls each device.

The control device 33 includes a supply method judging means 30 and a supply temperature judging means 34.

The supply method determining means 30 is as described in the first embodiment. Therefore, the supply temperature determining means 34 will be described with reference to FIG.

In FIG. 4, step 11 in FIG.
The following description is for the case where the remaining hot water is used.

When supplying hot water to the bathtub, it is desirable to supply hot water at a temperature as close as possible to the set temperature. Therefore, in step 15, the calculation is started at a hot water supply temperature close to the set temperature.

In step 16, first, the initial temperature of the calculation is set to the set temperature + 1 ° C. In step 17, it is determined whether the temperature is the maximum temperature that can be set by the remote controller 29. If the temperature is the maximum temperature, supply is performed at step 18 at the maximum temperature.

If the calculated temperature is not the maximum temperature in step 19, the calorie of the supplied hot water is calculated. If the required heat is obtained in step 20, the hot water is supplied at that temperature.

If the required amount of heat has not been reached, the above calculation is repeated with the calculation temperature set to + 1 ° C. As a result, hot water can be efficiently filled in the bathroom at a supply temperature close to the set temperature.

(Embodiment 3) FIG. 5 is a structural view of a bath kettle with a gas water heater as one embodiment of the third aspect of the present invention.

Only the points different from FIG. 1 will be described. A draining device 35 is provided downstream of the reheating line 19 in the bathtub water circulation circuit.

Each device is electrically connected to a control device 36 for controlling each device. In addition, the control device 36 includes:
A supply method determining unit 30 and a draining device driving unit 37 are included.

The supply method determining means 30 is as described in the first embodiment. Therefore, the drain drive device 37 will be described with reference to FIG. In FIG. 6, steps after the display of bathtub water drainage in step 14 in FIG. 2 will be described.

After the display of the bathtub water drainage in step 14, the drainage device 35 is driven by the drainage device driving means 37 in step 21 to start drainage. There is a timer corresponding to the remaining hot water amount in the microcomputer in the control device 36. Step 2
In step 2, a timer corresponding to the amount of remaining hot water is started.

At step 23, it is determined whether or not the timer has expired. At step 24, the drainage device 35 is stopped. Then, in step 25, the display of bathtub water drainage is stopped, and in step 26, hot water is supplied so as to reach the set amount of hot water at the set temperature.

As a result, water can be automatically drained and hot water can be efficiently placed in the bathtub.

[0064]

As is clear from the above description, according to the bath kettle with the hot water supply device according to the first aspect, the remaining hot water is detected, the calorie for setting the hot water amount and the hot water temperature is calculated, and the remaining hot water is used. The machine determines if it is better and tells the user.

According to the second aspect of the present invention, when it is better to use the remaining hot water, the machine determines and supplies the optimum supply temperature, thereby saving energy without wasting heat. Can be.

According to the third aspect of the present invention, the remaining hot water can be automatically discharged even when it is better to discharge the remaining hot water.

With the above effects, there is an effect that a bath kettle with a water heater can be provided which effectively uses resources of the global environment.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a bath kettle with a water heater according to an embodiment of the present invention.

FIG. 2 is a flowchart of a bath kettle with the water heater.

FIG. 3 is an explanatory view showing a configuration of a bath kettle with a water heater according to a second embodiment of the present invention.

FIG. 4 is a flowchart of a bath kettle with the water heater.

FIG. 5 is an explanatory view showing a configuration of a bath kettle with a water heater according to a second embodiment of the present invention.

FIG. 6 is a flowchart of a bath kettle with the water heater.

FIG. 7 is an explanatory view showing a configuration of a conventional bath kettle with a water heater.

[Explanation of symbols]

 2 Water volume detector 15 Bath heat exchanger 18 Circulation pump (Circulation device) 21 Bath gas solenoid valve 22 Bath gas proportional valve 27,33,36 Control device 28 Air flow switch 29 Remote control (bath water temperature setting device) 30 Judgment method of supply Means 31 Display means 32 Bath thermistor (temperature detecting device) 35 Drainage device 37 Drainage device driving means

Claims (3)

[Claims] 1. A water amount detecting device for detecting a water amount, a circulating device for circulating water in a bathtub, a temperature detecting device for detecting a temperature of circulating water, a bathtub water temperature setting device for setting a temperature of the bathtub water, A bathtub water amount setting device for setting the amount of bathtub water, a control device for controlling each of the above devices, a remaining hot water detecting means for detecting remaining hot water in the bathtub, and calculating the amount of heat of the remaining hot water and using the remaining hot water A water heater comprising a supply method determining means for determining whether it is more economical or better to newly supply hot water, and a display means for displaying the content determined by the supply method determining means on the bathtub water temperature setting device. With bath kettle. 2. A water amount detecting device for detecting a water amount, a circulating device for circulating water in a bathtub, a temperature detecting device for detecting a temperature of circulating water, a bathtub water temperature setting device for setting a temperature of the bathtub water, A bathtub water amount setting device for setting the amount of bathtub water, a control device for controlling each of the above devices, a remaining hot water detecting means for detecting remaining hot water in the bathtub, and calculating a calorific value of the remaining hot water to supply hot water at an optimum supply temperature. Bath kettle with water heater equipped with means for judging supply temperature. 3. A water amount detecting device for detecting a water amount, a circulating device for circulating water in a bathtub, a temperature detecting device for detecting a temperature of circulating water, a bathtub water temperature setting device for setting a temperature of the bathtub water, A bathtub water amount setting device for setting the amount of bathtub water, a bathtub water drainage device provided in the bathtub water circulation circuit, a control device for controlling each of the above devices, and a remaining hot water detecting means for detecting remaining hot water in the bathtub; A method of calculating the amount of heat of the remaining hot water and determining whether it is more economical to use the remaining hot water or whether it is better to newly supply hot water, and the bathtub water based on a signal from the supplying method determining means. A bathtub equipped with a water heater, comprising: a bath water drain driving device driving means for driving the water drain device; and a display means for displaying the content determined by the supply method determining means on the bath water temperature setting device.