JPH06347090A - Additional heating-controlling method for bath device - Google Patents

Abstract

PURPOSE:To provide a method of controlling additional heating, which enables additional heating to be carried out to a level of a comfortable temperature of hot water without giving an excessively hot feeling or a tepid feeling to a person who takes a bath when a temperature of hot water in a bathtub is increased by additional heating and further without modifying a set temperature. CONSTITUTION:In a bath device for carrying out the additional heating of hot water in a bathtub according to a set temperature TO, a threshold temperature TTH of hot water, which is lower than the set temperature TO by a predetermined temperature, is set. When a temperature of hot water in the bathtub is lower than the threshold temperature T,. of hot water at the time of starting the additional heating, the additional heating is carried out so that the temperature of hot water in the bathtub is raised to the set temperature TO. When a temperature of hot water in the bathtub is higher than the threshold temperature TTH of hot water at the time of starting the additional heating, the additional heating is carried out so that the temperature of hot water becomes higher than the temperature of hot water at the time of starting the additional heating by a predetermined temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reheating control method for a bath apparatus which reheats hot water in a bath according to a set hot water temperature.

[0002]

2. Description of the Related Art Conventionally, in a fully automatic bath apparatus having a reheating function, hot water supply is started by pressing an automatic switch of a remote controller after inputting a set hot water temperature T ₀ and a set hot water level H ₀ , When the hot water in the bathtub reaches the set water level H ₀ , the hot water supply is stopped, and if the temperature of the poured hot water is lower than the set hot water temperature T _{0 due} to heat radiation, etc., it is reheated to set the hot water temperature. I was boiled to become.

When the user feels that the hot water is warm while bathing, or when the remaining hot water on the previous day is re-heated, the additional heating switch on the remote controller is pressed to ignite the additional heating burner to heat the hot water in the bathtub. As shown in FIG. 4, the heating is performed so that the set hot water temperature T _{0 is} higher by a predetermined temperature (for example, 2 ° C.).
This is because different people have different feelings of temperature, and the body takes away the temperature of the hot water. If the temperature of the hot water to be reheated is raised about 2 ° C higher than the set hot water temperature, This is because everyone thought that they could enjoy bathing without feeling hot.

[0004]

In the conventional bath apparatus, in any case during the reheating, as shown in FIG. 4, a constant temperature (2 ° C. in FIG. 4) is higher than the set hot water temperature T ₀ .
The heating control was performed so that the temperature would be just as high. However, there is a large difference in how hot water feels like hot or lukewarm, and when the body gets used to the temperature while using hot water, even the same person may feel hot or lukewarm. It will change.

For example, when the hot water temperature during bathing is lower than the set hot water temperature T ₀ by 3 ° C., it is felt to be lukewarm, and additional heating is performed (FIG. 4).
), Because it boiled to a temperature that is 2 ° C higher than the set hot water temperature T _0, the temperature difference between the hot water at the start and the end of reheating is 5 ° C, and I feel that this 5 ° C temperature difference is very hot. I will end up. As a result, the bather often turns off the additional heating switch of the remote controller before the additional heating is completed, and stops the additional heating halfway.

On the other hand, contrary to the above, when the hot water temperature during bathing is higher than the set hot water temperature T _A by, for example, 1 ° C. and it is felt to be lukewarming, the hot water temperature is only 1 (FIG. 4). Since the burner is extinguished when the temperature rises by 0 ° C and the additional heating is completed, it feels lukewarm even though the hot water temperature is 2 ° C higher than the set hot water temperature T ₀ . Therefore, the bather operates the remote control to set the set hot water temperature to a high temperature and restarts the heating process again, but forgets to lower the hot water temperature T ₀ that was once raised and starts hot water from the beginning the next day. When boiled, there was a problem that the hot water became too hot and the temperature of the hot water had to be lowered by adding water.

Further, in the prior art, when the hot water temperature (2 in FIG. 4) higher than the set hot water temperature T ₀ is felt to be lukewarm, the burner does not ignite and the set hot water temperature T ₀
It is necessary to perform operations such as changing the. In addition, when reheating the remaining hot water on the previous day by heating, the hot water is heated to a temperature that is 2 ° C. higher than the changed set temperature T _0, so that there is a problem that it becomes too hot. .

The present invention has been made in view of the above circumstances, and its purpose is to prevent the bather from feeling hot or slimy when the hot water temperature in the bathtub is raised by reheating, and An object of the present invention is to provide a reheating control method for a bath device that can reheat to a comfortable hot water temperature without changing the set hot water temperature.

[0009]

In order to achieve the above object, a reheating control method according to the present invention is a bath device for reheating hot water in a bathtub according to a set hot water temperature, in which a predetermined temperature is set to be higher than the preset hot water temperature. Set a low threshold water temperature, and if the bath temperature at the start of reheating is lower than the threshold temperature, perform reheating to reach the set hot water temperature. When the hot water temperature is higher than the threshold hot water temperature, the hot water is heated so that the hot water temperature is higher than the hot water temperature at the start of the hot water heating by a constant temperature.

[0010]

The principle of the present invention will be described with reference to FIG. According to the additional heating control method of the present invention, when the hot water temperature T ₀ is set by a remote controller or the like for boiling the bath, the threshold hot water is a temperature lower than the set hot water temperature T ₀ by a constant temperature (for example, 2 ° C.). Set the temperature T _TH . When reheating, the reheating completion hot water temperature is changed depending on whether the hot water temperature at the start of reheating is higher or lower than the threshold hot water temperature T _TH .

That is, if the hot water temperature at the start of additional heating is lower than the threshold hot water temperature T _TH (-in FIG. 1), the hot water temperature at the completion of additional heating becomes the set hot water temperature T _0. I will add fire,
On the other hand, when the hot water temperature at the start of additional heating is higher than the threshold hot water temperature T _TH (-in FIG. 1), the hot water temperature at the completion of additional heating is a constant temperature (for example, 2 ° C.) than each hot water temperature. ) Only the hot water is heated.

In the present invention, as a result of the additional heating control,
If you are accustomed to a hot water temperature lower than the threshold hot water temperature T _TH, the hot water temperature after completion of additional heating will be the set normal hot water temperature T ₀ , so the hot water temperature after completion of additional heating will be hot. Without feeling
Further, if the user is accustomed to a hot water temperature higher than the threshold hot water temperature T _TH, the hot water temperature after completion of reheating is raised by a constant temperature (for example, 2 ° C.). It is possible to perform comfortable reheating without feeling. Also,
When the hot water temperature at the start of additional heating is higher than the set hot water temperature T ₀ (Fig. 1
No.), the additional heating can be performed without the need to reset the hot water temperature T ₀ as in the conventional case.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of an embodiment of a fully automatic bath apparatus configured by applying the method of the present invention.

The hot water supply device 1 comprises a hot water heat exchanger 4, a reheating heat exchanger 5, and a hopper 6. Water heater 1
A water supply pipe 7 for supplying water to the water is connected to a water inlet side of the hot water supply heat exchanger 4 via a water temperature sensor 8 and a water amount sensor 9, and also via a water drop valve 10. It is connected to the hopper 6.

The outlet port side of the hot water supply heat exchanger 4 is connected to the hot water inlet port side of the hot and cold water mixing valve 12 via the hot water temperature sensor 11, and the hot water inlet port side of the hot and cold water mixing valve 12 is used for hot water supply. A branch pipe 13 branched from the water inlet side of the heat exchanger 4 is connected. Further, the hot water mixing valve 12 has a hot water mixing outlet connected to the hopper 6 via a hot water mixing sensor 27 and a hot water drop valve 14, and an external tap 15 such as a faucet via an external pipe 15. It is connected to the.

On the other hand, the hot water inlet side of the heat exchanger 5 for additional heating is
The recirculation circuit 2 for reheating through the circulation pump 16, the return switching valve (four-way valve) 17, the pressure sensor 18, and the temperature sensor 19 for reheating.
Connected to the return pipe 20 of. Further, the hot water outlet side of the additional heating heat exchanger 5 is connected to the outgoing pipe 22 of the additional heating circulation path 2 via an outgoing switching valve (three-way valve) 21.

The other valve opening of the forward switching valve 21 is connected to the hopper 6 via the pouring amount sensor 23, and
It is connected to the return switching valve 17 via a drainage switching valve (three-way valve) 24. Further, the other valve opening of the drainage switching valve 24 is connected to the hopper 2.

The control unit 25 is an electric circuit that controls the operation of the entire hot water supply device and also has a built-in microprocessor (CPU) and infrared transmitter / receiver for performing the additional heating control of the present invention described later. Also, the remote controller 26
It is a wireless or wired remote operation device that sends and receives various signals to and from the control unit 25, and includes various operation buttons (not shown), a puzzer, a display, and the like.

Next, an operation example of the additional heating control of the present invention in the above embodiment will be described, but before that, the operation from hot water supply to completion of boiling water in the bath apparatus of the embodiment of FIG. 1 will be briefly described.

First, the remote controller 26 is operated to input the water level H ₀ of the hot water to be poured into the bathtub 3 and its hot water temperature T ₀ ,
Set in the control unit 25. Now, as an example, the water level H ₀ =
40 cm and hot water temperature T ₀ = 42 ° C. are set.

Next, when an automatic switch (not shown) of the remote controller 26 is pressed, pouring is started, and the control unit 25 ignites the burner of the heat exchanger 4 for hot water supply and opens the valve of each hot water supply path to set the incoming water temperature. The heat quantity of the burner is calculated based on the detection outputs of the sensor 8 and the water quantity sensor 9, and the pouring heat exchanger 4
Hot water of a predetermined temperature is discharged from the mixed hot water temperature sensor 27.
The hot water having the set hot water temperature T ₀ = 42 ° C. is produced by mixing the water in the hot and cold water mixing valve 13 while monitoring
Supply to hopper 6.

The hot water supplied to the hopper 6 is, first of all, in order to remove the air between the return switching valve 17 and the bath 3, the drain switching valve 24, the return switching valve 17, the pressure sensor 18, and the additional heating temperature sensor. It is poured into the bathtub 3 through the return pipe 20 and the return pipe 20. When the air removal between the return switching valve 17 and the bath 3 is completed, the return switching valve 17 is closed, and the hot water in the hopper 6 passes through the pouring amount sensor 23, the forward switching valve 21, and the forward pipe 22 of the reheating circulation path 2, It is poured into the bathtub 3.

The pressure sensor 18 detects the pressure of the hot water accumulated in the bath 3 and sends it to the controller 25. The control unit 25 converts the pressure sent from the pressure sensor 18 into a water level and monitors the water level of the hot water poured into the bathtub 3. And
When the water level in the bathtub 3 reaches the set water level H ₀ = 40 cm, the burner is stopped, each valve in the hot water supply path is closed to stop pouring, and the buzzer of the remote controller 25 is sounded to notify that boiling has occurred.

Actually, the temperature of the hot water in the bathtub 3 is measured by the additional heating temperature sensor 19 at the stage where the water is poured to the set water level H ₀ , and the heat radiation from the hot water supply path or natural heat radiation from the bathtub is performed. Therefore, when the hot water temperature is lower than the set hot water temperature T _{0, the} hot water heat exchanger 5 is used to heat the hot water temperature up to the set hot water temperature T _0. Since it is the same, its explanation is omitted.

Next, the additional heating control of the present invention will be described with reference to the flowchart of FIG. When the hot water in the bathtub 3 is boiled as described above and the user feels that the water has become dull while he is bathing, he presses the reheating switch (not shown) of the remote controller 26 (step S1), 25 the set hot water temperature T ₀ = 42 constant temperature than ° C. (e.g., 2
℃) lower temperature, threshold water temperature T _TH for additional heating control
= 40 ° C. (step S2), the reheating circulation pump 16 is driven, and hot water in the bathtub 3 is circulated through the reheating circulation path 2 while the hot water temperature sensor 19 detects the hot water temperature. (Step S3).

Then, the control unit 25 compares the measured hot water temperature with the preset threshold hot water temperature T _TH = 40 ° C. (step S4), and the measured hot water temperature is the threshold hot water temperature T _TH. When the measured hot water temperature is higher than the threshold hot water temperature T _TH , the hot water in the bathtub 3 is heated so as to reach the set hot water temperature T ₀ (step S5). Reheating is performed so that the hot water temperature in the bathtub 3 is higher than the measured hot water temperature by a constant temperature (for example, 2 ° C.) (step S6).

That is, the control circuit 25 causes the step S4.
When the hot water temperature is determined at, the burner of the additional heat exchanger 5 is ignited, and the hot water in the bathtub 3 is returned to the return pipe 20 of the additional heating circulation path 2, the additional heating temperature sensor 19, the pressure sensor 18, Reheating is performed while circulating through the return switching valve 17, the additional heating circulation pump 16, the additional heating heat exchanger 5, the forward switching valve 21, and the forward pipe 22 of the secondary heating circulation path 2.

The reheating temperature sensor 19 detects the temperature of hot water in the circulating bath 3 and sends it to the controller 25. Control unit 25
Monitors the hot water temperature sent from the additional heating temperature sensor 18, and in step S4, the hot water temperature is the threshold hot water temperature T.
_When it is determined that the temperature is lower than _TH , the hot water temperature is the set hot water temperature T.
Heating is performed until _TH = 42 ° C is reached (step S
5) When the set hot water temperature T _TH reaches 42 ° C., the heating is completed.

When it is determined in step S4 that the hot water temperature is higher than the threshold hot water temperature T _TH, additional heating is performed until the hot water temperature becomes 2 ° C. higher than the measured hot water temperature. (Step S6), when the hot water temperature is reached, the additional heating is completed.

For the sake of clarity, a concrete value will be described. For example, the measured hot water temperature is the threshold hot water temperature T.
Assuming that the temperature is 39 ° C., which is 1 ° C. lower than _TH = 40 ° C., in this case, the burner is additionally controlled so that the hot water temperature becomes the set hot water temperature T ₀ = 42 ° C. by the determination in step S5. The temperature rise due to additional heating at this time is 39 ° C to 42 ° C
Since it is only 3 ° C to the above, and the final hot water temperature is 42 ° C which is originally set as a comfortable hot water temperature, the bather does not feel too hot due to the temperature increase of 3 ° C.

On the other hand, the measured hot water temperature is the threshold hot water temperature T _TH =
Assuming that the temperature is 41 ° C., which is higher by 1 ° C. than 40 ° C., in this case, the burner is additionally controlled so as to be 43 ° C., which is higher by 2 ° C. than the measured hot water temperature 41 ° C., by the determination in step S6. . Since this temperature rise of 2 ° C. is within the allowable temperature difference as a comfortable hot water temperature, the bather does not feel that the temperature rise of 2 ° C. is too hot.

Further, the measured hot water temperature is the set hot water temperature T ₀ =
For example, even when the user feels lukewarm at 43 ° C., which is 1 ° C. higher than 42 ° C., and performs additional heating, the additional heating of the burner is controlled to 45 ° C., which is higher by 2 ° C., according to the determination in step S6. Therefore, since the hot water temperature at this time only rises by 2 ° C., it is possible to enjoy a comfortable hot water temperature without being overheated.

If the temperature rise of 2 ° C. feels lukewarm, the hot water temperature T ₀ can be changed by pressing the hot water button many times without changing the set hot water temperature T _0. Can be increased by 2 ° C from the current level. Therefore, even a person who likes hot water and feels lukewarm even at 43 ° C. or 44 ° C. can perform satisfactory reheating.

In this type of bath device, it is possible to set an allowable upper limit temperature of the bath (for example, 50 ° C.) and control so that the hot water temperature does not rise even if the reheating switch is pressed. It is desirable because of its safety.

[0035]

As described above, according to the additional heating control method of the present invention, the additional heating temperature is automatically changed depending on whether the hot water temperature at the start of additional heating is higher or lower than the threshold hot water temperature. Since the hot water is heated, the hot water temperature does not feel lukewarm or hot, and it is possible to always perform comfortable heating.

Further, since it is not necessary to change the set hot water temperature one by one when reheating, the set hot water temperature will not change and will not become hot or slimy when the bath is heated the next day. You can enjoy a nice bath.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the additional heating control method of the present invention.

FIG. 2 is a block diagram of an embodiment of the present invention.

FIG. 3 is a flowchart of an additional heating control operation of the present invention in the above embodiment.

FIG. 4 is an explanatory diagram of a conventional additional heating control method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water supply device 2 Additional heating circuit 3 Bathtub 4 Heat exchanger for hot water supply 5 Heat exchanger for additional heating 16 Circulation pump for additional heating 18 Pressure sensor 19 Temperature sensor for additional heating 20 Return pipe 22 Forward pipe 25 Control part 26 Remote control

Claims (1)

[Claims] 1. A bath device for heating hot water in a bathtub according to a set hot water temperature, wherein a threshold hot water temperature is set lower than the preset hot water temperature by a predetermined temperature, and the hot water temperature in the bathtub at the start of hot water heating is the above-mentioned. When the temperature of the hot water is lower than the threshold temperature, the hot water is heated to the set temperature, and when the temperature of the bathtub at the time of starting the hot water is higher than the temperature of the threshold water, the temperature at the start of the heating is changed. A heating control method for a bath device, which is characterized in that heating is performed so that the temperature of the hot water is higher than the temperature of the hot water by a certain temperature.