JP2006153451A - Automatic hot-water filling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect accurately arrival of mixed hot water to a set water level regardless of an installation place of a bathtub, the state of its pipe or the like. <P>SOLUTION: When filling the bathtub 30 with hot water for the first time, a time from a supply start time of the mixed hot water into the bathtub 30 until a time when the water level in the bathtub 30 reaches a prescribed water level is measured by an error time generation part 70, and an error detection time of hot-water filling determined by adding a prescribed time to the measured time is determined, and an error of the water level of the mixed hot water to be filled in the bathtub 30 is detected by using the error detection time from the next hot-water filling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automatic hot water filling apparatus that mixes hot water boiled in a hot water supply tank and feed water and supplies the mixed hot water to a bathtub.

FIG. 13 is a schematic configuration diagram of an automatic filling apparatus. This automatic hot water filling device controls the energization of the heater 2 in the hot water tank 1 to boil the water in the hot water tank 1 and mixes the hot water and the hot water through the electric mixing valve 3 to a desired temperature. The mixed hot water is fed to the pipe 5 from the air release valve 4 and supplied to the bathtub 7 through the heat retaining heater 6.
The circulation pump 8 circulates the mixed hot water stretched in the bathtub 7 from the pipe 9 to the pipe 5 and keeps the set temperature by heating the heat retaining heater 6. In such a hot water filling device, the set temperature at which the electric mixing valve 3 is operated is corrected in order to make the mixed hot water stretched in the bathtub 7 in accordance with the set temperature.

In this temperature correction method, the electric mixing valve 3 varies the opening degree of each of the hot water and water supply valves in accordance with the set temperature, and the mixed hot water at the set temperature flows out. Is detected by the thermistor 10, a temperature difference between the detected temperature and the set temperature is obtained, and the set temperature given to the electric mixing valve 3 is corrected as needed with this temperature difference as a correction temperature.
In such an apparatus, when performing the automatic hot water filling operation, the water level of the mixed hot water in the bathtub 7 is detected by the water level sensor 11, and whether or not this water level has reached the set water level is determined as the elapsed time from the start of automatic hot water filling. An error detection time is set in order to determine that the water level of the mixed hot water has exceeded the set water level.

  However, this error detection time is set to the same time regardless of the location where the bathtub 7 is installed or the state of the piping. However, the time until the water level of the mixed hot water in the bathtub 7 reaches the set water level is different depending on the place where the house is built, the state of various pipes, filter clogging, etc., and the same error detection time. If it is set, it cannot be accurately detected that the mixed hot water has reached the set water level.

For example, if it is determined that an error has occurred when the set water level is not reached even after adding the hot water for 10 minutes after the automatic water filling operation, the house is low in the water supply pressure, for example. However, in the case where it is built, 10 minutes of the error detection time elapses before the mixed hot water in the bathtub 7 reaches the set water level, and it is detected that an error has occurred.
If the house is built at a high water supply pressure, it is determined that the mixed hot water in the bathtub 7 has not reached the set water level even if the mixed hot water in the bathtub 7 has reached the set water level. In addition, a large amount of hot water is poured until an error occurs. Even when the water level sensor 11 fails or when the bathtub 7 is unplugged, a large amount of mixed hot water is poured to waste.

As described above, the error detection time for detecting that the water level of the mixed hot water exceeds the set water level during the automatic filling operation is set to the same time regardless of the place where the bathtub 7 is installed or the state of the piping. Therefore, it cannot be accurately detected that the mixed hot water has reached the set water level.
An object of the present invention is to provide an automatic hot water filling device that can accurately detect that the mixed hot water has reached the set water level regardless of the installation location of the bathtub and the state of the piping thereof.

  An automatic hot water filling apparatus according to a first aspect of the present invention is an automatic hot water filling apparatus that mixes hot water boiled up in a hot water supply tank and water supply, and supplies the mixed hot water to the bathtub. The water level sensor that detects the level of mixed hot water and the time from when the hot water is supplied to the bathtub until the water level in the bathtub reaches the specified water level when the hot water is supplied to the bathtub. Error time creating means for measuring and adding a predetermined time to this time to obtain an error detection time of hot water filling, of the mixed hot water stretched in the bathtub using the error detection time from the next hot water filling Detect water level errors.

  An automatic hot water filling apparatus according to a second aspect of the present invention is an automatic hot water filling apparatus that mixes hot water boiled in a hot water supply tank and feed water, and supplies the mixed hot water to the bathtub. A water level sensor that detects the water level of the mixed hot water, a water level change calculating means that obtains the relationship with respect to the time of the water level change detected by the water level sensor during filling of the bathtub, and a water level when adding hot water in the bathtub Error time creating means for obtaining an error detection time until reaching a predetermined water level based on the relationship with respect to the time of the water level change obtained by the change calculating means.

  ADVANTAGE OF THE INVENTION According to this invention, the automatic hot water filling apparatus which can detect correctly that mixed hot water reached the setting water level irrespective of the installation place of a bathtub, the state of its piping, etc. can be provided.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an automatic filling apparatus. The water heater main body 20 is provided with two hot water tanks 21 and 22 connected in series by piping. A heater is disposed at the bottom of each of the hot water supply tanks 21 and 22. The hot water supply tanks 21 and 22 may be a single hot water supply tank.
One of the hot water supply tanks 21, 22 is supplied with water through a safety cock 23 and a pressure reducing valve 24, and the other hot water supply tank 22 is connected with an electric mixing valve 25. Yes.

The electric mixing valve 25 is connected to the hot water supply tank 22 as described above, and is connected to the pressure reducing valve 24 via the safety cock 23, and adjusts and mixes the amount of hot water and the amount of water supplied from the hot water supply tank 22, respectively. It has a function of supplying mixed hot water at a desired temperature. Note that the safety cock 23 is for manually opening, for example, when there is an abnormality such as a water outage and discharging hot water in the hot water supply tanks 21 and 22 to the outside.
The electric mixing valve 25 is connected to an air release valve 26 and a water supply electromagnetic valve 27 incorporated therein, and is further connected to a bathtub 30 via circulation pipes 28 and 29 branched into two systems. Yes.

One of the circulation pipes 28 and 29 is provided with a heat retaining heater 31 and a thermistor 32 and a limiter 33 as a water temperature sensor.
The other circulation pipe 29 is provided with a circulation pump 34 and an electric two-way valve 35 and a water level sensor 36. On the other hand, the main body PC board 40 has a microcomputer and each electronic component mounted on a printed circuit board, and is provided in the hot water supply apparatus main body 20.
The main body PC plate 40 has a function of performing energization control to the heaters in the hot water supply tanks 21 and 22 to operate the heating operation and the electric mixing valve 25 to perform hot water supply operation. A bathroom remote controller 43 and a sub-remote controller 44 are connected to the board 40 via remote control cables 41 and 42, respectively.

  The bathroom remote controller 43 and the sub remote controller 44 perform operation setting for the heating operation in the hot water supply tanks 21 and 22, and the bathroom remote controller 43 is provided in the bathroom. It is provided in a room to be used, for example, a kitchen room.

  The bathroom remote control 43 is equipped with a microcomputer, and transmits operation contents of various switches such as an automatic hot water filling switch, a hot water temperature adjustment switch, a hot water amount adjustment switch, a high temperature hot water hot water switch, an additional hot water switch, etc. to the main body PC board 40, It communicates with the PC board 40 and has a function to display the amount of water, hot water temperature display, automatic hot water display, high temperature hot water display, additional hot water display, warming display, and hot water display on the liquid crystal display. ing.

  The sub-remote controller 44 is equipped with a microcomputer and transmits the operation contents of various switches such as a switching button, a hot water temperature adjustment button, a hot water replenishment setting button, an automatic hot water filling / heat keeping button, a clock setting button, and an operation button to the main body PC board 40. At the same time, it communicates with the main body PC board 40, and a hot water display, automatic hot water display, set temperature display, remaining hot water display, energizing display, hot water setting display, remaining hot water temperature display, energization are displayed on the liquid crystal display. It has a function to perform start display, power supply display, operation display, and stop display.

  The main body PC board 40 has functions of a hot water supply control unit 45, a mixing correction unit 46, and a bathtub correction unit 47 by the operation of the microcomputer. The hot water supply control unit 45 performs operation control such as automatic hot water filling operation, automatic heat insulation operation, and automatic addition hot water operation. For example, in the automatic hot water filling operation, the electric mixing valve 25 is adjusted to the temperature of the hot water set in advance in the bathroom or the sub-remote controllers 43 and 44, and the water supply electromagnetic valve 27 built in the air release valve 26 is opened to keep the heat. The hot water in the hot water supply tanks 21 and 22 is supplied to the bathtub 30 via the heater 31. At this time, the electric two-way valve 35 is opened, and the pressure change in the bathtub 30 is measured by the water level sensor 36. The hot water supply is continued until the water level is reached, and when the set water level is reached, the hot water supply is stopped.

  In this automatic hot water filling operation, after the automatic hot water filling operation is finished, the electric two-way valve 35 is opened to start the operation of the circulation pump 34. By the operation of the circulation pump 34, the hot water temperature in the bathtub 30 immediately after the hot water filling is reached. Is measured by the thermistor 32, the temperature difference with respect to the set temperature is confirmed, and if the temperature difference is large, the hot water filling temperature of the next day is automatically corrected to control the temperature close to the set temperature. ing.

In the automatic heat insulation operation, the temperature of the hot water in the bathtub 30 is measured by the thermistor 32 every predetermined time, for example, every 10 minutes, and when the temperature is lower than the set temperature, the hot water heater 31 is energized to To keep warm.
In the automatic addition hot water operation, the water level of the bathtub 30 is checked by the water level sensor 36, and when the water level of the bathtub 30 falls below the set water level, the water supply electromagnetic valve 27 built in the air release valve 26 is opened, and electric mixing is performed. The hot water maintained at the set temperature by the valve 25 is added to the bathtub 30 to the set water level and added.
The mixing correction unit 46 has a function of correcting the mixing operation at the electric mixing valve 25 as needed based on the difference between the temperature detected by the thermistor 32 and the set temperature set in the bathroom remote controller 43 or the sub-remote controller 44.

  The bathtub correction unit 47 detects the temperature of the mixed hot water stretched on the bathtub 30 by the thermistor 32 after the completion of the hot water filling to the bathtub 30, and determines the difference between the detected temperature and the set temperature corrected by the mixing correction unit 46. Based on this, it has a function of further correcting the set temperature corrected by the mixing correction unit 46. In this case, the bathtub correction unit 47 circulates the mixed hot water stretched in the bathtub 30 between the circulation pipes 29 and 28 by driving the circulation pump 34, and sets the temperature of the mixed hot water flowing through the circulation pipes 29 and 28. This is detected by the thermistor 32.

Next, the operation of the apparatus configured as described above will be described according to the automatic filling correction flowchart shown in FIG.
For example, when the set temperature is set in the sub-remote controller 44 and the automatic hot water filling button is operated, the hot water supply control unit 45 first opens the electric mixing valve 25 to an opening corresponding to the maximum temperature that can be adjusted in step # 10. Then, the water supply electromagnetic valve 27 is opened, and the hot water having the highest temperature is supplied to the bathtub 30 through the circulation pipe 28.
The supply of the hot water of the highest temperature is performed for 3 minutes, for example, based on the determination at step # 11, and thereby the circulation pipe 28 is warmed. In this way, the hot water of the highest temperature is supplied when the temperature of the hot water supplied to the bathtub 30 decreases from a high temperature to a low temperature due to the temperature characteristics of the circulation pipe 28 and the like, and from a low temperature to a high temperature. In order to show a different value from time to time, the temperature of the mixed hot water finally applied to the bathtub 30 varies.

Therefore, in order to fill the hot water using the same temperature characteristics of the circulation pipe 28 and the like, the hot water of the highest temperature is once supplied, and thereafter the hot water of the set temperature is supplied. Next, in step # 12, the mixing correction unit 46 adjusts the electric mixing valve 25 to an opening degree corresponding to the set temperature set by the sub-remote controller 44, and supplies hot water and water from the hot water tanks 21 and 22 to each other. The mixed hot water is supplied to the bathtub 30 through the circulation pipe 28.
In the electric mixing valve 25, the temperature set by the sub-remote controller 44 is STMP, the hot water temperature of the bathtub 30 (hereinafter referred to as bath temperature) is RvTMP, and the error relative to the electric mixing valve 25 (hereinafter referred to as mixing correction: actual: Is a correction value due to mixing valve error and various conditions) RvMIX,
STMP + RvTMP + RvMIX (1)
Temperature is set.

  Next, the mixing correction unit 46 determines whether it is time to correct at any time, for example, every 30 to 60 seconds, by moving to the next step # 14 if the hot water filling is in the determination of step # 13. If the timing is reached, the process proceeds to step # 15, where a temperature difference Xa between the temperature detected by the thermistor 32 and the set temperature set in the sub-remote controller 44 is obtained, and it is determined whether this temperature difference Xa is within a predetermined range.

That is, the mixing correction unit 46 sets the temperature difference Xa as the detected temperature of the thermistor 32 as NTMP.
X = (STMP + RvTMP) −NTMP (2)
And the temperature difference Xa is within a predetermined range, for example,
0.4 ° C ≧ Xa ≧ −0.4 ° C
It is judged whether it is in the range.

As a result of this determination, if the temperature difference Xa is within the predetermined range, the mixing correction unit 46 returns to step # 12 to drive the electric mixing valve 25, but if the temperature difference Xa is not within the predetermined range. In Step # 16, the mixing correction RvMIX of the electric mixing valve 25 is corrected.
This mixing correction RvMIX is
RvMIX = RvMIX + X (3)
It is obtained by calculating.

Then, the mixing correction unit 46 returns to Step # 12 to correct the mixing correction RvMIX of the above equation (1), adjusts the electric mixing valve 25 to the opening degree corresponding to the corrected set temperature, and the hot water tank 21. , 22 is supplied to the bathtub 30 through the circulation pipe 28.
As described above, during automatic hot water filling, the mixing correction RvMIX is corrected at any time, and variations due to the electric mixing valve 25 are corrected.

After this, when the hot water filling is completed, the bathtub correction unit 47 moves from Step # 13 to # 17, and the circulation pump 34 is driven for 3 minutes, for example, and is stretched between the circulation pipes 29 and 28 in the bathtub 30. The mixed hot water is circulated, and the thermistor 32 detects the temperature of the mixed hot water flowing through the circulation pipes 29 and 28.
Next, in step # 18, the bathtub correction unit 47 obtains a temperature difference Xb between the detected temperature of the thermistor 32 and the set temperature set in the sub-remote controller 44, and determines whether this temperature difference Xb is within a predetermined range. .
That is, the bathtub correction unit 47 calculates the temperature difference Xb.
Xb = STMP-NTMP (4)
And the temperature difference Xb is within a predetermined range, for example,
0.3 ° C. ≧ Xb ≧ −0.3 ° C.
It is judged whether it is in the range.

  As a result of this determination, if the temperature difference Xb is within the predetermined range, the bathtub correction unit 47 does not correct the temperature applied to the electric mixing valve 25, but if the temperature difference Xb is not within the predetermined range, step is performed. Moving to # 19, a bath correction (hereinafter referred to as bath correction) RvTMP for correcting a variation in temperature caused by heat loss or the like in the circulation pipe 28 or the bath 30 that varies depending on the season is obtained.

This bath correction RvTMP is
RvTMP = RvTMP + Xb (5)
It is obtained by calculating.
Therefore, in the next automatic hot water filling operation, the electric mixing valve 25 is driven at the set temperature of the above formula (1) where the bath correction RvTMP is performed, and the mixed hot water is filled in the bathtub 30.

  As described above, in the first embodiment, the mixing operation of the electric mixing valve 25 is corrected at any time based on the difference between the detected temperature of the mixed hot water stretched on the bathtub 30 and the set temperature, After the hot water filling is completed, the mixing corrected set temperature is further corrected based on the difference between the detected temperature of the mixed hot water stretched on the bathtub 30 and the mixing corrected set temperature. The mixed hot water at a constant temperature can be supplied to the bathtub 7 at all times, and in addition, variations in temperature due to heat loss in the bathtub 5 that varies depending on the piping 5 and seasons can be corrected.

Therefore, in the second and subsequent automatic hot water filling operations, as described above, temperature variations due to heat loss or the like in the bathtub 5 that differs depending on the season can be corrected. Hot water can be stretched over the bathtub 30, and even if the set temperature is changed, hot water with high accuracy can be stretched over the bathtub 30 with a single hot water fill.
In addition, in the said 1st Embodiment, if the thermistor 32 is arrange | positioned at the bathtub 30 side in the piping 28 for circulation, it can raise control of the temperature of the hot water supplied to the bathtub 30 more.

Next, a second embodiment of the present invention will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 3 is a block diagram of the automatic hot water filling device. On the main body PC board 40, the water level in the bathtub 30 detected by the water level sensor 36 is equal to or lower than the predetermined water level, and the temperature of the mixed hot water in the bathtub 30 detected by the thermistor 32 is set in the bathroom remote controller 43 or the sub-remote controller 44. If the temperature is equal to or lower than the set temperature, an additional hot water section 50 having a function of supplying hot water boiled in the hot water supply tanks 21 and 22 to the bathtub 30 is supplied. Yes.

Next, the operation of the apparatus configured as described above will be described with reference to the automatic addition water flow chart shown in FIG.
When the automatic hot water filling operation is finished and the mixed hot water is supplied into the bathtub 30, the main body PC board 40 drives the circulation pump 34 in step # 20 to supply the mixed hot water in the bathtub 20 to each of the circulation pipes 29, 28. At this time, the temperature of the mixed hot water is detected by the thermistor 32, and the detected temperature (bath temperature) NTMP is compared with the set temperature STMP.
As a result of the comparison, if the bath temperature NTMP is lower than the set temperature STMP, the main body PC board 40 determines whether the water level is being monitored during the heat retaining operation by moving to step # 21. For example, the water level signal from the water level sensor 36 is received and the current water level NLEV in the bathtub 30 is measured.
And the main body PC board 40 moves to step # 22, compares the current water level NLEV in the bathtub 30 with the set water level SLEV, and if the result of this comparison is that the current water level NLEV is lower than the set water level SLEV, step # 23 Then, the hot water section 50 is operated.

  That is, since the bath temperature NTMP is lower than the set temperature STMP and the current water level NLEV is lower than the set water level SLEV, the additional hot water unit 50 sets the electric mixing valve 25 to 60 ° C. which is higher according to the set temperature, for example. Then, the water supply electromagnetic valve 27 is opened, the hot water boiled in the hot water supply tanks 21 and 22 is mixed, and the hot water mixed at 60 ° C. is added to the bathtub 30 and hot water is added.

This additional hot water is not limited to adding 60 ° C. mixed hot water to the bathtub 30, and the main body PC board 40 A / D converts the difference between the bath temperature NTMP and the set temperature STMP and the water level signal of the water level sensor 36. The main body PC plate 40 may determine how many hot waters should be added based on the expected increase in the A / D value when taking in.
For example, as shown in FIG. 5, if the bath temperature NTMP in the bathtub 30 is 41 ° C., the set temperature STMP is 42 ° C., the current water level NLEV is 10 (d), and the rising water level due to the added hot water is 1 (d) According to the ratio between the current water level NLEV10 (d) and the rising water level 1 (d) due to the addition water, the temperature K ° C of the addition water is
{41 ° C. × 10 (d) + K ° C. × 1 (d)} / (10 + 1) = 42 ° C.
From
K ℃ = 52 ℃
become.

  If the calculated value is too high, an upper limit temperature of the added hot water may be provided to avoid this. If 15 liters (42 ° C.) hot water is added to 150 liters (41 ° C.) of hot water in the bath 30, the hot water in the bath 30 becomes 41.1 ° C. For this reason, when the temperature difference of 0.9 ° C. from 42 ° C. is heated by the heat retaining heater 31, energy of 0.17 kw / h is required by the heat retaining heater 31 and operation energy for driving the circulation pump 34 is necessary. Become.

Therefore, for example, if hot water of 60 ° C. is added to the bath 30 or hot water at a temperature obtained by calculation is used, the amount of power consumption can be reduced and the time for heating by the heat retaining heater 31 can be omitted.
During this addition, the main body PC board 40 compares the current water level NLEV in the bathtub 30 increased by the addition water in step # 24 with the set water level SLEV, and when the current water level NLEV reaches the set water level SLEV, step # 20. Return to.

  If the current water level NLEV reaches the set water level SLEV as a result of the comparison between the current water level NLEV in the bathtub 30 and the set water level SLEV in the above step # 22, the main body PC board 40 moves to step # 25, and the inside of the bathtub 30 It is determined whether or not the monitoring time of the water level is over. If this monitoring time is over, the water level monitoring during the heat insulation operation is finished in step # 26.

On the other hand, if the water level is not being monitored as a result of the determination in step # 21 during the heat retaining operation, the main body PC board 40 moves to step # 27 and drives the circulation pump 34 to drive the bathtub 20. The mixed hot water is circulated through the circulation pipes 29 and 28, and at this time, the detected temperature NTMP of the thermistor 32 and the set temperature STMP are compared.
As a result of the comparison, if the detected temperature NTMP is higher than the set temperature STMP, the main body PC board 40 moves to step # 28 to determine whether the detection time of the water temperature in the bathtub 30 has ended, and the detected temperature NTMP. Is lower than the set temperature STMP, the process proceeds to step # 29 to energize each heater of the hot water supply tanks 21 and 22, for example, continuously for 10 minutes, and in step # 30, the water level monitoring during the heat insulation operation is set. In step # 31, the power supply to each heater of the hot water supply tanks 21 and 22 is cut off. If it is determined in step # 29 that the heaters have been energized for 10 minutes, for example, the main body PC board 40 proceeds to step # 32 and interrupts the heaters.

On the other hand, if the detected temperature NTMP is higher than the set temperature STMP as a result of the comparison between the detected temperature NTMP and the set temperature STMP in step # 20, the main body PC board 40 moves to step # 33 and the current water level in the bathtub 30 is reached. NLEV is compared with the set water level SLEV. If the current water level NLEV is lower than the set water level SLEV as a result of this comparison, the process proceeds to step # 34 to drive the electric mixing valve 25 at the set temperature, Add water to bathtub 30.
Then, the main body PC board 40 compares the current water level NLEV in the bathtub 30 that is increased by the added hot water in step # 35 and the set water level SLEV, and when the current water level NLEV reaches the set water level SLEV, the process proceeds to step # 36. It is determined whether or not the water level monitoring time has ended, and when the water level monitoring time has ended, the process proceeds to step # 36 to end the automatic addition hot water.

  Thus, in the said 2nd Embodiment, if the water level in the bathtub 30 is below a predetermined water level, and the water temperature of the mixed hot water in the bathtub 30 is below a preset temperature, it will boil in the hot water supply tanks 21 and 22. Since the hot water, for example, 60 ° C. mixed hot water is supplied to the bathtub 30, the temperature of the mixed hot water can be kept at the set temperature even if the hot water is added, and the warming operation is performed using the warming heater 31 after the automatic hot water operation. It is not necessary to perform this operation, and the temperature can be quickly set. In addition, since it is not necessary to energize the heat retaining heater 31, the power consumption can be reduced.

  Note that the second embodiment is not limited to the automatic addition hot water as described above, and the same effect can be obtained when applied to the manual addition hot water. In this case, since manual addition hot water is often controlled by time, it is sufficient to store in advance how much the A / D value of the water level sensor 36 changes in a certain time.

Next, a third embodiment of the present invention will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 6 is a block diagram of the automatic hot water filling device. For example, when the hot water supply switch of the bathroom remote control 43 is operated to set the hot water supply hot water, the electric mixing valve 25 is raised by a predetermined temperature with respect to the set temperature. A high-temperature hot-water supply unit 60 that is operated at a high temperature and supplies mixed hot water to the bathtub 30 is provided.
The main body PC board 40 has a function of adding hot water to the mixed hot water in the bathtub 30 by operating the electric mixing valve 25 at a set temperature after completing the hot water filling.

Next, the operation of the apparatus configured as described above will be described with reference to a high-temperature hot water flow chart shown in FIG.
When the hot water filling switch provided in the bathroom remote controller 43 is operated during the automatic hot water filling operation or with the setting of the automatic hot water filling operation, the high temperature hot water supply unit 60 is set to the hot hot water hot water in step # 40. In step # 41, the electric mixing valve 25 is operated at a temperature increased by a predetermined temperature α with respect to the set temperature set by the bathroom remote controller 43, for example.
As a result, an automatic hot water filling operation is performed in which the hot water having a set temperature + α is supplied from the electric mixing valve 25 to the bathtub 30 through the circulation pipe 28.

FIG. 8 shows the temperature change of the mixed hot water being stretched in the bathtub 30 and the energization timing to the heat retaining heater 31 at this time. It can be seen that there is little decrease in the temperature of the mixed hot water, and the energization time to the heat retaining heater 31 is also short.
On the other hand, as shown in FIG. 9, when mixed hot water having a set temperature is supplied from the electric mixing valve 25, the temperature of the mixed hot water changes drastically and the energization time to the heat retaining heater 31 is frequently performed. I understand that.

The supply of the mixed hot water having a temperature of the set temperature + α is performed on the day when the high-temperature hot water switch is operated or only once. When the automatic filling operation is performed as described above and the water level in the bathtub 30 detected by the water level sensor 36 reaches the set water level, the automatic filling operation ends.
If the hot water hot water switch is not operated during the automatic hot water filling operation, the process proceeds from step # 40 to # 43, and the hot water supply control unit 45 operates the electric mixing valve 25 at the set temperature set by the bathroom remote control 43. Let

As described above, in the third embodiment, when the hot water hot water switch is operated together with the automatic hot water filling operation, the electric mixing valve 25 is operated at a temperature higher than the set temperature by the predetermined temperature α. Since the mixed hot water is supplied to the bathtub 30, the mixed hot water in the bathtub 30 cannot be uneven as in the case of hot hot water after the automatic hot water filling operation is finished. The mixed hot water in can be made uniform temperature.
As a result, if you want mixed hot water at a slightly higher temperature after the completion of automatic hot water filling operation, you only need to operate the hot water hot water switch during automatic hot water filling operation. This eliminates the need for troublesome operations such as lowering the set temperature after the automatic filling operation.

  In addition, even if the bath is not bathed immediately after filling, it takes time to lower the bath temperature to the set temperature because the hot water is filled with the set temperature + α. The timing of the heat insulation operation can be delayed, and there is an effect of power saving.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 11 is a block diagram of an automatic hot water filling device. When the main body PC board 40 is filled with water for the first time in the bathtub 30, the time until the water level in the bathtub 30 detected by the water level sensor 36 reaches the predetermined water level from the start of supplying the mixed hot water to the bathtub 30 is set. An error time creating unit 70 having a function of measuring and adding a predetermined time to this time to obtain a hot water error detection time is provided.

In addition, the main body PC board 40 has a function of detecting an error in the water level of the mixed hot water stretched in the bathtub 30 by using the error detection time from the next hot water filling after the error detection time is obtained by the error time creating unit 70. Have.
Thus, when the hot water is filled in the bathtub 30 for the first time, the time from the start of supplying the mixed hot water to the bathtub 30 until the water level in the bathtub 30 reaches the predetermined water level is measured, and only the predetermined time with respect to this time is measured. If the error detection time of the added hot water filling is obtained, it is accurately detected that the mixed hot water has reached the set water level regardless of the installation location of the bathtub 30 or the state of its piping in the subsequent automatic hot water filling operation. It is possible to eliminate detection of an unnecessary error in the water level of the mixed hot water stretched in the bathtub 30.

Even when the house is built in a place where the water supply pressure is low or in a place where the water supply pressure is high, it is necessary to obtain the error detection time of the hot water filling according to the place where the house is built. For example, it will not be wasted such as flowing a large amount of mixed water until an error occurs and overflowing from the bathtub 30.
Further, even when the water level sensor 11 fails or when the bathtub 7 is unplugged, it is possible to reduce waste such as overflowing the bathtub 30 by flowing a large amount of mixed hot water.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 12 is a block diagram of an automatic hot water filling device. The main body PC board 40 is provided with functions of a water level change calculating unit 71 and an error time creating unit 72.
Among these, the water level change calculating unit 71 has a function of obtaining a relationship with respect to time of the water level change detected by the water level sensor 36 during filling of the bathtub 30. The error time creation unit 72 has a function of obtaining an error detection time until reaching a predetermined water level based on the relationship to the time of the water level change obtained by the water level change calculation unit 71 when adding hot water in the bathtub 30. Yes.

With such a configuration, the water level change calculation unit 71 inputs the water level signal output from the water level sensor 36 during hot water filling such as during automatic hot water filling operation, and is stretched on the bathtub 30 from this water level signal. The water level of the mixed hot water is obtained, and the relationship of the water level change with time is obtained.
And when adding hot water in the bathtub 30, the error time preparation part 72 is mixed in the bathtub 30 from the water level signal which the water level sensor 36 outputs, when adding hot water in the bathtub 30 The water level change of the hot water is obtained, and an error detection time until the predetermined water level is reached is obtained based on the water level change of the mixed hot water and the relationship with respect to the time of the water level change previously obtained by the water level change calculating unit 71.

The main body PC board 40 detects an error in the water level of the added hot water using the error detection time obtained by the error time creation unit 72.
As described above, in the fifth embodiment, during hot water filling into the bathtub 30, the relationship with respect to the time of the water level change detected by the water level sensor 36 is obtained, and when adding hot water in the bathtub 30, Since the error detection time until reaching the predetermined water level is obtained based on the relationship with the time of the water level change obtained earlier, even when adding hot water in the bathtub 30, the accurate hot water error detection time for this hot water is obtained. It can be obtained, it is possible to accurately detect that the mixed hot water has reached the set water level regardless of the installation location of the bathtub 30 and the state of its piping, and the useless error in the water level of the mixed hot water stretched in the bathtub 30 Can be eliminated.

  Similarly to the fourth embodiment, even if the house is built in a place where the water supply pressure is low or in a place where the water supply pressure is high, the place where the house is built The error detection time of the hot water filling according to the temperature can be obtained, and for example, a large amount of mixed hot water is not wasted until an error occurs.

The block diagram which shows 1st Embodiment of the automatic hot-water filling apparatus concerning this invention. The automatic filling correction flowchart in the same apparatus. The block diagram which shows 2nd Embodiment of the automatic hot water filling apparatus concerning this invention. The automatic addition water flowchart in the same apparatus. The figure for demonstrating the example of calculation of the hot water temperature of addition water. The block diagram which shows 3rd Embodiment of the automatic hot water filling apparatus concerning this invention. The high temperature hot-water supply flowchart in the same apparatus. The figure which shows the temperature change of the mixed hot water in the bathtub by the same apparatus, and the electricity supply timing to a heat retention heater. The figure which shows the temperature change of the hot water in the bathtub in a conventional apparatus, and the electricity supply timing to a heat retention heater. The schematic diagram which shows the mixed hot water of the uniform temperature in the bathtub obtained by the same apparatus. The block diagram which shows 4th Embodiment of the automatic hot-water filling apparatus concerning this invention. The block diagram which shows 5th Embodiment of the automatic hot-water filling apparatus concerning this invention. The schematic block diagram of the conventional automatic hot water filling apparatus.

Explanation of symbols

  20: Hot water supply device main body, 21, 22: Hot water supply tank, 25: Electric mixing valve, 30: Bathtub, 31: Thermal insulation heater, 34: Circulating pump, 40: Main body PC board, 43: Bathroom remote control, 44: Sub remote control, 45 : Hot water supply control unit, 46: Mixing correction unit, 47: Bathtub correction unit, 50: Addition hot water unit, 60: High temperature hot water supply unit, 70: Error time generation unit, 71: Water level change calculation unit, 72: Error time generation unit .

Claims (2)

In an automatic hot water filling device that mixes hot water boiled in a hot water tank and water supply, and supplies this mixed hot water to the bathtub,
A water level sensor for detecting the water level of the mixed hot water stretched in the bathtub;
When the hot water is filled in the bathtub for the first time, the time from the start of the supply of the mixed hot water to the bathtub until the water level in the bathtub detected by the water level sensor reaches a predetermined water level is measured. An error time creating means for adding a predetermined time to obtain an error detection time of filling is provided,
An automatic hot water filling device that detects an error in the water level of the mixed hot water stretched in the bathtub from the next hot water filling using the error detection time. In an automatic hot water filling device that mixes hot water boiled in a hot water tank and water supply, and supplies this mixed hot water to the bathtub,
A water level sensor for detecting a water level of the mixed hot water stretched in the bathtub, and a water level change calculating means for obtaining a relationship with respect to time of a water level change detected by the water level sensor during hot water filling in the bathtub;
When adding hot water in the bathtub, an error time creating means for obtaining an error detection time until a predetermined water level is reached based on the relationship to the time of the water level change obtained by the water level change calculating means;
An automatic hot water filling device characterized by comprising:

Images