JPH1082559A - Bath device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath device, reduced in a difference between a hot-water temperature, obtained when an additional heating temperature is made constant based on a set hot-water temperature for supplying hot water, and a temperature, expected by a bathing person, and lightened in operations such as the control of a remote controller, supplying water and the like during bathing. SOLUTION: A bath device is provided with a heat exchanger (heat exchanger 5 for additional heating), a circulating passage (circulating passage 2 for additional heating), a pump (circulation pump 16 for additional heating) and a control means (controller 25 and remote controller 26) while a threshold hot-water temperature (TTH), lower than a set hotwater temperature (To) is set as a reference temperature for additional heating. According to this method, an arriving hot-water temperature by the additional heating operation is made different in a case when the hot-water temperature upon bathing and additional heating is lower than the threshold hot-water temperature and another case when the hot-water temperature upon bathing and additional heating is higher than the threshold hot-water temperature whereby a comfortable additional heating hot-water temperature, expected by a bathing person, can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath apparatus for controlling a reheating temperature in accordance with a set hot water temperature.

[0002]

Conventionally, in fully automated bath apparatus having the add-fired function, after entering from the remote control and set water temperature T _O of the set water level H _O, starts hot water supply by pressing the automatic switch. When the hot water in the bathtub reaches the set water level H _O , the hot water supply is stopped, followed by additional heating to reach the set hot water temperature.

In addition to reheating at the time of hot water supply, reheating is performed when the temperature of hot water in the bathtub decreases. For example, when the hot water feels warm during bathing, or when reheating the remaining hot water of the previous day, pressing the reheating switch on the remote control to ignite the reburning burner, and as shown in FIG. Additional heating is performed so that the temperature of the hot water is higher than the set hot water temperature T _O by a predetermined temperature (for example, 2 ° C.). This is in consideration of how the temperature of the hot water differs depending on the person, and that the hot water temperature is reduced depending on the body temperature of the bather. If the additional hot water temperature is set to about 2 ° C. higher than the set hot water temperature T _O , It is based on speculation that it will not be hot or warm.

[0004]

However, there is an individual difference between the temperature of the hot water and the temperature felt by the bather, and even if the person feels hot at the beginning of bathing, the bath gets warmer as the bathing time elapses. Feeling is what you usually experience.

For example, when the temperature of the hot water during bathing is lower by 3 ° C. than the set hot water temperature T _{O, the} reheating is performed when the user feels it is warm (FIG. 6).
), Since the water is heated to a temperature 2 ° C. higher than the set hot water temperature T _O , the temperature difference between the hot water at the start and at the completion of the reheating is 5 ° C.
This temperature difference of 5 ° C. feels very hot. Therefore, it is expected that the bather turns off the reheating switch of the remote controller before the reheating is completed, and stops the reheating on the way.

[0006] Also, if the hot water temperature in the bath makes a tepid and feel with fired when also, for example, high 1 ℃ than the set hot water temperature T _O (in FIG. 6), the burner where the increased water temperature is standing was 1 ℃ When the fire is extinguished and the reheating is completed, the hot water temperature is set to the set hot water temperature T _O.
Despite being 2 ° C higher than this, you will feel warm. In this case, it is expected that the bather operates the remote controller to set the set hot water temperature T _O to a high temperature, and reheats again.

Further, if the reheating is attempted at a hot water temperature (FIG. 6) higher than the set hot water temperature T _O by 2 ° C. or more, the burner does not ignite and the reheating is performed. Hot water temperature T
Operations such as changing _O are required.

Further, once the set hot water temperature T _O is increased,
Due to the data holding function of the remote controller, this becomes the initial set temperature, and when hot water is supplied from the beginning, the temperature of the hot water in the bathtub becomes too hot, and the bather has the disadvantage of having to lower the hot water temperature by supplying water. If the remaining hot water from the previous day is to be re-boiled by reheating, it will be reheated to a temperature 2 ° C. higher than the changed set hot water temperature T _O ,
Hot water gets hotter. Therefore, the set hot water temperature T _O
Has been changed, it is necessary to return to the initially set hot water temperature.

Therefore, the present invention reduces the difference between the hot water temperature obtained when the reheating temperature is made constant based on the set hot water temperature for hot water supply and the temperature expected by the bather, An object of the present invention is to provide a bath apparatus in which operations such as operation and water supply are reduced.

[0010]

The bath apparatus according to the present invention comprises a heat exchanger (heat exchanger 5 for additional heating), a circulation path (circulation path 2 for additional heating), a pump (circulation pump 16 for additional heating) and By providing a control means (control unit 25, remote controller 26) and setting a threshold hot water temperature (T _TH ) lower than the set hot water temperature (T _O ) as the reheating reference temperature, the temperature of the hot water during the reheating of the bath can be reduced. When the temperature is lower than the threshold hot water temperature, and when the hot water temperature during bath reheating is higher than the threshold hot water temperature, the bathing person expects by making the ultimate temperature of the hot water different by the reheating operation. A comfortable reheating water temperature has been achieved.

That is, the bath apparatus of the present invention is a bath apparatus for heating hot water in a bathtub (3) by reheating, and a heat exchanger for heating hot water in the bathtub (the reheating heat exchanger 5). )
A circulation path (recirculation path 2 for additional heating) connecting the heat exchanger and the bathtub; and a pump provided in the circulation path for circulating hot water in the bathtub through the circulation path to the heat exchanger. (Circulation pump 16 for reheating) and a threshold hot water temperature lower than the set hot water temperature as the reheating reference temperature, and when the hot water temperature during bath reheating is lower than the threshold hot water temperature, the set hot water is set. Control means for raising the temperature of the hot water by a reheating operation to a temperature, and when the temperature of the hot water during the reheating of the bath is higher than the threshold temperature, increasing the temperature of the hot water by a constant temperature by the reheating operation (control unit 25, And a remote controller 26).

As shown in FIG. 1, the bath apparatus of the present invention comprises:
When the hot water temperature T _O is set from a remote controller or the like in order to boil hot water, a threshold hot water temperature T _{TH that} is lower than the set hot water temperature T _O by a certain temperature (for example, 2 ° C.) is set. This is the reheating reference temperature. Bathing, water temperature at the add-fired start changing water temperature of add-fired completed by either higher or lower than the threshold YuAtsushi T _TH, it is performed to add fired.

[0013] That is, as shown in ~ in Figure 1, if the hot water temperature during add-fired start is lower than the threshold YuAtsushi T _TH is, the hot water temperature reaches the set hot water temperature T _O at add-fired completion If the hot water temperature at the start of reheating is higher than the threshold hot water temperature T _TH as shown in FIG. Reheating is performed so that the temperature of the hot water is higher by a certain temperature (for example, 2 ° C.) than the temperature.

By such additional heating control, the threshold hot water temperature T
Because if you are accustomed to lower hot water temperature than the _TH is hot water temperature at the time of add-fired completion is a suitable temperature serving as a set hot water temperature T _O of normal, there is no feel hot the hot water temperature after the add-fired completion In addition, if the user is accustomed to a hot water temperature higher than the threshold hot water temperature T _TH, the hot water temperature after the completion of reheating is increased by a certain temperature (for example, 2 ° C.). You will not feel slimy, and you can perform comfortable reheating. Also, if the hot water temperature at the add-fired start is higher than the set water temperature T _O, i.e., even in the case of Oyobi in FIG 1, to perform the add-fired without the need to reset the YuAtsushi T _O as in the prior art Can be.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the bath apparatus of the present invention. The hot water supply apparatus 1 includes a heat exchanger 4 for hot water supply, a heat exchanger 5 for additional heating, and a hopper 6. Hot water supply device 1
A water supply pipe 7 for supplying water to the water supply is connected to the water inlet side of the hot water supply heat exchanger 4 via a water temperature sensor 8 and a water amount sensor 9, and a water drop valve 10. Connected to hopper 6.

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

On the other hand, the hot water inlet side of the additional heat exchanger 5 is
It is connected to the return pipe 20 of the reheating circuit 2 via the reheating circulation pump 16, the return switching valve (four-way valve) 17, the pressure sensor 18, and the reheating temperature sensor 19. Are connected through a circulation path 2. Further, the tap hole side of the additional 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 opening of the outgoing switching valve 21 is connected to the hopper 6 via a pouring amount sensor 23.
The drain switching valve (three-way valve) 24 is connected to the return switching valve 17. Further, another valve port of the drainage switching valve 24 is connected to the hopper 6.

The control unit 25 is an electric circuit that controls the operation of the entire hot water supply apparatus 1 and includes a microprocessor (CPU), an infrared transceiver, and the like for performing the additional heating control of the present invention described later. Also, the remote control 26
This is a wireless or wired remote control device that transmits and receives various signals to and from the control unit 25, and includes various operation buttons (not shown), a buzzer, a display, and the like.

Therefore, the operation of such a bath apparatus from hot water supply to completion of water heating will be described. FIG. 3 shows a pouring route at the time of hot water supply with a thick line.

Before the hot water is supplied, the user operates the remote controller 26 to operate the bathtub 3.
The water level H _O of the hot water to be poured and the hot water temperature T _O are input to the control unit 25. Now, as an example, the water level H _O = 4
0 cm and the hot water temperature T _O = 42 ° C.

Next, when an automatic switch (not shown) of the remote controller 26 is pressed, pouring is started, and the control section 25 ignites the burner of the heat exchanger 4 for hot water supply and opens a valve of each hot water supply path to enter the hot water supply path. The calorie of the burner is calculated based on the detection outputs of the water temperature sensor 8 and the water input amount sensor 9, and the heat exchanger 4 for hot water supply is calculated.
Hot water of a predetermined temperature is supplied from the
Water is mixed at the hot / water mixing valve 12 while monitoring the temperature, and hot water having the set hot water temperature T _O = 42 ° C. is produced and supplied to the hopper 6.

The hot water supplied to the hopper 6 drains air between the return switching valve 17 and the bathtub 3 so that the drainage switching valve 2
4. The hot water is poured into the bathtub 3 via the return switching valve 17, the pressure sensor 18, the additional heating temperature sensor 19, and the return pipe 20. When the air bleeding between the return switching valve 17 and the bathtub 3 is completed, the return switching valve 17 is closed, and the hot water in the hopper 6 is supplied to the pouring amount sensor 23, the forward switching valve 21, and the forward pipe 2 of the additional heating circulation path 2.
After 2, it is poured into bath 3.

The pressure sensor 18 accumulates in the bathtub 3
The hot water pressure is detected and sent to the control unit 25. The control unit 25
Converts the pressure sent from pressure sensor 18 to water level
Then, the level of the hot water poured into the bathtub 3 is monitored. Soshi
And the water level in the bathtub 3 is the set water level H _O= When it reaches 40cm
Stop the burner, close each valve in the hot water supply path and stop pouring
At the same time, sound the buzzer of the remote control 25, etc.
Notify that it was crippled.

Actually, the temperature of the hot water in the bath tub 3 is measured by the additional heating temperature sensor 19 at the stage when the water is poured to the set water level H _O , so that the heat is radiated from the hot water supply path and naturally radiated from the bath tub. the YuAtsushi is additionally fired to set hot water temperature T _O using 5 additionally焚用heat exchanger in the case such as that falls below set hot water temperature T _O is the same as the conventional bath apparatus for this operation Therefore, the description is omitted.

Next, the reheating control will be described with reference to the flowchart of FIG. FIG. 5 shows the hot water path during the reheating operation by a thick line. The hot water in the bathtub 3 is heated by the hot water supply, and during bathing, the user feels that the hot water has become warm. As shown in step S1, when the additional heating switch (not shown) of the remote controller 26 is pressed, the controller 25 As shown in S2, a temperature lower than the set hot water temperature T _O = 42 ° C. by a certain temperature (for example, 2 ° C.) is set as a threshold hot water temperature T _TH = 40 ° C. as a reheating standard temperature for reheating control. Is done. At this time, the recirculation pump 16 is driven, and in step S3,
While the hot water in the bathtub 3 is circulated through the reheating circuit 2, the temperature of the hot water is detected by the reheating temperature sensor 19.

Then, as shown in step S4, the controller 25 sets the measured hot water temperature and the set threshold hot water temperature T _TH
= 40 ° C and the measured hot water temperature is the threshold hot water temperature T _TH
If the temperature is lower than the above, the process proceeds to step S5 to perform additional heating so that the hot water in the bathtub 3 becomes the set hot water temperature T _O.
If the measured hot water temperature is higher than the threshold hot water temperature T _TH ,
The process proceeds to step S6, and reheating is performed so that the temperature of the hot water in the bathtub 3 becomes higher than the measured hot water temperature by a certain temperature (for example, 2 ° C.).

That is, when the temperature of the hot water is determined in step S 4, the control circuit 25 ignites the burner of the additional heat exchanger 5, and supplies the hot water in the bathtub 3 to the return pipe of the additional heat circulation circuit 2. 2
0, additional heating temperature sensor 19, pressure sensor 18, return switching valve 17, additional heating circulating pump 16, additional heating heat exchanger 5, outgoing switching valve 21, path of outgoing pipe 22 of additional heating circulation circuit 2. Refire while circulating in.

The additional heating temperature sensor 19 detects the temperature of the hot water in the circulating bathtub 3 and sends it to the control unit 25. Control unit 25
Monitors the temperature of the hot water sent from the additional heating temperature sensor 19, and when it is determined in step S4 that the hot water temperature is lower than the threshold hot water temperature T _TH , the hot water temperature is set to the set hot water temperature T _{TH. O} =
Reheating is performed until the temperature reaches 42 ° C. (step S5). When the set hot water temperature T _O reaches 42 ° C., the reheating is completed.

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

For the sake of simplicity, a specific value will be described. For example, when the measured hot water temperature is a threshold hot water temperature T
Assuming that the temperature is 39 ° C., which is, for example, 1 ° C. lower than _TH = 40 ° C., in this case, the burner is additionally heated so that the hot water temperature becomes the set hot water temperature T _O = 42 ° C. by the determination in step S5. At this time, the temperature rise due to reheating is 39 ° C to 42 ° C.
The bath temperature is only 3 ° C., and the final hot water temperature is 42 ° C. which is originally set as a comfortable hot water temperature. Therefore, the bather does not feel too hot due to the temperature rise of 3 ° C.

On the other hand, the measured hot water temperature is a threshold hot water temperature T _TH =
Assuming that the temperature is 41 ° C., which is 1 ° C. higher than 40 ° C., in this case, the burner is additionally heated to 43 ° C. which is higher by 2 ° C. than the measured hot water temperature 41 ° C. by the determination in step S6. . Since the temperature rise of 2 ° C. is within an allowable temperature difference for 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 equal to the set hot water temperature T _O =
Even if additional heating is performed at 43 ° C., which is 1 ° C. higher than 42 ° C., for example, the burner is additionally heated to 45 ° C. higher by 2 ° C. by the determination in step S6. Therefore, since the hot water temperature at this time only increases by 2 ° C., it is possible to enjoy a comfortable hot water temperature without becoming too hot.

If the user feels warm even at a temperature rise of 2 ° C., the user can press the reheating switch many times to change the hot water temperature without changing the set hot water temperature T _O. Can be increased by 2 ° C. Therefore, even a person who likes hot water who feels warm even at 43 ° C. or 44 ° C. can perform satisfactory reheating.

In this type of bath apparatus, it is possible to set a permissible upper limit temperature of the bath (for example, 50 ° C.), and to control so that the hot water temperature does not rise further even if the additional heating switch is pressed. Desirable for its safety.

[0037]

As described above, according to the present invention, the difference between the uniform reheating temperature based on the set hot water temperature for hot water supply and the temperature expected by the bather is reduced, In addition to achieving the expected reheating temperature, the operation of the remote controller during bathing and complicated operations such as water supply can be reduced, and a bath apparatus that facilitates bathing can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing additional heating control of a bath apparatus of the present invention.

FIG. 2 is a block diagram showing one embodiment of a bath apparatus of the present invention.

FIG. 3 is a block diagram showing a hot water supply operation.

FIG. 4 is a flowchart illustrating a reheating control operation.

FIG. 5 is a block diagram showing a reheating control operation.

FIG. 6 is an explanatory diagram showing conventional reheating control.

[Explanation of symbols]

T _TH threshold hot water temperature T _O setting hot water temperature 2 Reheating circuit 3 Reheating bath heat exchanger 16 Reheating circulation pump 25 Control unit (control means) 26 Remote control (control means)

Claims (1)

[Claims] 1. A bath apparatus for heating hot water in a bathtub by reheating, a heat exchanger for heating hot water in the bathtub, a circulation path connecting the heat exchanger and the bathtub, A pump provided in the circulation path to circulate the hot water in the bathtub through the circulation path to the heat exchanger; and setting a threshold hot water temperature lower than the set hot water temperature as a reheating reference temperature, and setting the hot water during bathing and reheating. If the temperature is lower than the threshold hot water temperature, raise the hot water temperature by reheating operation to the set hot water temperature,
A bath apparatus comprising: control means for increasing the hot water temperature by a fixed temperature by a reheating operation when the hot water temperature at the time of additional bathing is higher than the threshold hot water temperature.