JPH01222154A - Automatic hot-water supplier provided with function of reservation for hot-water filling - Google Patents

Abstract

PURPOSE:To effect the reserving operation of systematic automatic hot-water supplying, by a method wherein a controller is connected to a control unit, controlling the automatic hot-water supplying, and the controller is provided with a bath switch and a hot-water filling reservation switch while the preferential order of operation between the bath switch and the hot-water filling reservation switch is set. CONSTITUTION:When a bath switch and a hot-water filling reservation switch 43 are operated, the operation of hot-water filling switch 41, a heat-up and temperature keeping switch 42 or the like, for example, is stopped at that time while the bath switch is put ON at a reserved time and the reserved hot-water filling switch 43 is also operated to effect hot-water filling. When the hot-water filling reservation switch 43 is put ON under a condition that the bath switch is put OFF, the hot-water filling switch 43 is put ON at the reserved time. When the hot-water filling reservation switch 43 is operated and the bath switch is put ON, the operation of the bath switch is not accepted and the bath switch as well the hot-water filling switch 43 are put on at the reserved time whereby the hot-water filling operation is effected. The preferential order of operation between the hot-water filling switch 43 and the bath switch is controlled in such a manner whereby the reserved operation of systematic automatic hot-water supply may be effected.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is directed to hot water heating in a one-can, two-channel type automatic water heater that connects the same water heater to a bathtub through a circulation channel and a hot water filling channel. Regarding tension reservation switch.

(b) Prior Art Conventionally, as one type of automatic water heater, there is the above-mentioned one-can, two-channel automatic water heater.

In this automatic water heater, a heat exchanger in the main body of the water heater is connected to the bathtub through the outgoing piping and the incoming piping to form a circulation flow path, and the heat exchanger is connected to the bathtub in the middle of the outgoing piping of the circulation flow path. A circulation pump is provided, and one end of the separately provided hot water filling piping is connected to the heat exchanger, and the other end is connected to the part of the outgoing piping upstream of the circulation pump via a three-way switching valve. Furthermore, it is characterized by a configuration in which a mixing valve is provided midway through the hot water filling piping, and a hot water filling flow path is provided separately in addition to the circulation flow path.

In addition, with this configuration, hot water filling work, boiling,
Heat insulation work etc. can be performed in the following manner.

In other words, when filling hot water, the three-way switching valve is driven to switch the hot water supply flow path from the circulation flow path to the hot water filling flow path, and the high temperature hot water generated in the water heater body is fed to the mixing valve to mix the water and maintain the appropriate temperature. This is done by generating hot water (for example, 38°C) and discharging the appropriate amount of hot water into the bathtub through the hot water filling pipe, the three-way switching valve, and the outgoing hot water supply pipe. Then, when the amount of hot water reaches a preset amount using a controller or the like, the circulation pump automatically stops and the hot water supply stops, completing the hot water filling operation.

After that, boiling and keeping warm will be carried out,
This work involves driving the three-way switching valve to switch the hot water supply flow path from the hot water filling flow path to the circulation flow path, and discharging the high-temperature hot water that has been heat exchanged in the water heater body into the bathtub through the outgoing piping.
This is done by forming a circulation flow by returning the bath water in the bathtub to the heat exchanger through the return pipe, and raising the salinity of the bath water in the bathtub to a set temperature. When the set temperature is reached, the circulation pump is automatically stopped and circulation is stopped, completing the boiling and warming work.

(C) Problems to be Solved by the Invention In such conventional automatic water heaters, a controller is naturally connected to a control device that controls automatic hot water supply, and this controller has a controller that controls hot water supply to the bathtub. For example, a hot water filling switch, a boiling heat retaining switch, a refilling switch, an additional hot water switch, etc. can be provided, and in addition to this, a hot water filling reservation switch that can be used to reserve hot water filling operation using a timer can be provided. However, if a bath switch and a hot water reservation switch are installed together, the automatic water heater will not be able to perform its full function unless the relationship between each switch and its operation destination is clearly controlled. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic water heater having a hot water filling reservation function that can solve such problems.

(d) Means for solving the problem The present invention connects the heat exchanger and the bathtub in communication with an outgoing piping and an incoming piping with a circulation pump interposed in the middle to form a circulation flow path, The hot water filling pipe for supplying mixed hot water for hot water filling is branched and communicated with the outgoing pipe on the upper side of the circulation pump via a three-way switching valve to form a hot water filling flow path.
In an automatic water heater with two cans and channels, a controller is connected to the control device that controls automatic hot water supply, and the controller has a bath switch for supplying hot water to the bathtub and a hot water supply that can be reserved with a timer to fill the hot water. A hot water filling reservation switch is provided, and the order of operation priority for the hot water filling reservation switch and the bath switch is set according to the operating destination.■ If the bath switch is turned on first, and then the hot water filling reservation switch is turned on, the bath switch operation will be performed at that point. After that, when the reserved time set by the timer is reached, the bath switch is turned on, the hot water filling switch is also turned on, and hot water filling operation starts.

′ ■ If you turn on the hot water filling reservation switch while the bath switch is off, the hot water filling switch will be turned on and hot water filling operation will start when the reserved time set by the timer arrives.

■ If you turn on the hot water filling reservation switch first and then turn on the bath switch, the bath switch on operation will not be accepted and will be ignored, and the bath switch will not be turned on when the reservation time set by the timer arrives. , the hot water filling switch is also turned on and hot water filling operation is started.

This invention relates to an automatic water heater having a hot water filling reservation function configured as described above.

(e) Actions and Effects With the above-described configuration, the present invention has the following actions and effects.

That is, in the present invention, if the bath switch is first turned on and then the hot water filling reservation switch is turned on, at that point, the bath switches, such as the hot water filling switch, boiling heat retaining switch, etc., have stopped operating. Then, when the reserved time set by the timer comes, the bath switch is turned on, and the reserved hot water filling switch is also turned on to start the hot water filling operation.

Furthermore, if the hot water filling reservation switch is turned on while the bath switch is off, when the reserved time set by the timer comes, the hot water filling switch is turned on and hot water filling operation is started.

Also, if you turn on the hot water reservation switch first and then turn on the bath switch, the bath switch on operation will not be accepted and will be ignored, but when the reserved time set on the timer comes, the bath switch will be turned on. The hot water filling switch is also turned on and hot water filling operation begins.

In this way, since each operation relationship between the hot water filling switch and the bath switch is controlled depending on the operation destination, it is possible to perform systematic automatic hot water supply reservation operation without causing unnecessary confusion. This has the effect of making the machine more convenient to use.

(f) Examples The present invention will be specifically described below based on examples shown in the attached drawings.

FIG. 1 shows the conceptual overall configuration of an automatic water heater A according to the present invention. In the figure, 10 is a main body of the water heater, which is equipped with a heat exchanger 11 and an oil burner 12.

A water supply pipe 13 and a hot water supply pipe 14 are respectively connected to the heat exchanger 11, and tap water is supplied into the outer can 11b of the heat exchanger 11 through the water supply pipe 13.
Through this, hot water will be delivered to a sink, shower, etc. (not shown).

In FIG. 1, reference numeral 15 has a starting end connected to the inner pipe 11a of the heat exchanger 11, a terminal end connected to the bathtub 16, and a three-way switching valve 17 and a circulation pump 1 in the middle thereof.
Reference numeral 8 denotes an outbound piping, and 19 denotes a return piping whose starting end is connected to the bathtub 16 and whose terminal end is connected to the inner pipe 11a of the heat exchanger 11.

With this configuration, the heat exchanger 11-outgoing pipe 15-
A circulation flow path B can be formed from the bathtub 16, the return pipe 19, and the heat exchanger 11, and by driving the circulation pump 18, the bath in the bathtub 16 is circulated within the circulation flow path B. The bath can be continuously heated by the heat exchanger 11 to boil the bath and keep it warm.

Further, in FIG. 1, 20 is a hot water filling pipe whose starting end is branched from the hot water supply pipe 14, and the end of the hot water filling pipe 20 is a mixing valve 21, a solenoid valve 22, a pole tap 23, a cistern 24, and a water flow sensor 25. through,
It is communicatively connected to the three-way switching valve 17.

With this configuration, by switching the three-way switching valve 17 and connecting the terminal end of the hot water filling pipe 20 and the upstream side of the outgoing pipe 15, the heat exchanger 11→mixing valve 2 is connected.
1 → Solenoid valve 22 → Ball tap 23 → Distern 24 →
A hot water filling flow path C can be formed from the water flow sensor 25 - the three-way switching valve 17 - the outgoing pipe 15 - the circulation pump 18 -> the bathtub 16.

Note that from the outer can 11b of the heat exchanger 11, there is a hot water filling channel C.
A large amount of hot water flowing through the heat exchanger 11 can be supplied in a short time because the heat exchange capacity in the heat exchanger 11 is large.On the other hand, the heat exchange capacity of the inner pipe 11a of the heat exchanger 11 is small.

Note that 26 is a branch water supply pipe provided between the mixing valve 21 and the water supply pipe 13 to supply water to the mixing valve 21.

With this configuration, if the three-way switching valve 17 is switched to connect the hot water filling pipe 20 to the upstream side of the outgoing pipe 15 and then the circulation pump 18 is driven, the high temperature hot water from the heat exchanger 11 is branched by the mixing valve 21. Water supply piping 26
The mixed hot water is mixed with the water from the bathtub to generate mixed hot water at an appropriate temperature, and the mixed hot water is discharged into the bathtub 16 via the hot water filling pipe 20, the three-way switching valve 17, the outgoing pipe 15, and the circulation pump 18. Also, to explain other configurations in the illustrated embodiment, 27 is a lower limit float switch, which is used to ensure a certain amount of mixed hot water in the distiller 24 and prevent the generation of drawing noise etc. be.

On the other hand, 28 is an upper limit float switch, which is originally used to adjust the water level using the pole tap 23, but in the event that the ball tap 23 malfunctions, it prevents overflow from the cistern 24.

Further, 29 is a bath temperature sensor provided on the return side piping 19 of the circulation flow path B, and is used to measure the bath temperature of the bathtub 16. On the other hand, 30 is a heat exchanger 11 of the water heater main body 10.
This is a hot water supply temperature sensor disposed inside the heat exchanger 11, and measures the temperature of high temperature hot water generated inside the heat exchanger 11.

Furthermore, in FIG. 1, 31 is a control device, and the control device 31, as shown in FIG.
It is composed of a memory 34 consisting of an OM and a RAM.

In the above configuration, the input interface 32
The water level sensor 25. Lower limit float switch 27. Upper limit float switch 28. A bath water temperature sensor 29 and a hot water supply temperature sensor 30 are connected.

On the other hand, the output interface 33 includes a three-way switching valve 17.
．． Circulation pump 18. Mixing valve 21. A refueling pump SP and a solenoid valve 22 are connected.

The memory 34 also includes the various sensors 25, 27, etc. described above.
．． The three-way switching valve 17. Circulation pump 18. A driving order program for driving the mixing pulp 21° oil supply pump sp, solenoid valve 22, etc. is stored, and as described later,
Interrupted during the main routine.

When there is a pouring operation, the immediately previous operating conditions or hot water tapping conditions can be stored.

Next, the controllers 35 and 36 for manually sending drive output to the control device 3I will be explained.

In FIG. 1, a main controller 35 is installed in a kitchen or the like and is a controller that specifically instructs conditions for dispensing hot water to a bathtub 16, and a subcontroller 36 is a controller that is installed in a kitchen etc.
This is a controller installed near the bathtub 16 to instruct simple hot water supply conditions to the bathtub 6.

By operating these controllers 35 and 36, predetermined drive signals or control signals are sent to the control device 31, and based on the drive signals, the three-way switching valve 17 to the oil burner 12 (including the oil supply pump SP) is controlled. .Circulation pump 18. Can drive the mixing valve 21, electromagnetic valve 22, etc.

A specific configuration of the main controller 35 and sub-controller 36 shown in FIGS. 2 and 3 is shown.

In this embodiment, the main controller 35 includes, as shown in FIG. 2, an operation switch 40, a hot water filling switch 41, a boiling/keeping warm switch 42, a hot water filling reservation switch 43, and a freezing prevention switch 44. It is equipped with a child lock switch 45.

When the operation switch 40 is turned on, all the controllers 35, 36, the control device 31, the oil burner 12 (including the oil supply pump SP), the three-way switching valve 17. Circulation pump 18. Various driving devices such as the mixing pulp 21 and the electromagnetic valve 22, and the water amount sensor 25. Lower limit float switch 27. Upper limit float switch 28. Power can be supplied to various sensors such as the bath water temperature sensor 29 and the hot water supply temperature sensor 30.

Further, 40a and 46a are operation indicator lamps that light up when the operation switch 40 is turned on, 41a and 47a are hot water filling indicator lamps, 42a and 48a are boiling heat retention indicator lamps, and 43f is a hot water filling reservation indicator lamp. , 44
A+49a is a freeze prevention indicator lamp, 4'5a is a child lock indicator lamp, 50a is a hot water indicator lamp, and 51a is a hot water indicator lamp.

When the hot water filling switch 41 is turned on, it sends a drive signal to the control device 31, and based on the drive order program read from the memory 34, various drive devices 12.1
7.1B and 21.22 are driven to automatically fill hot water.

In addition, among the hot water supply conditions, the hot water filling temperature (e.g. 38℃)
The amount of hot water (for example, 2001) is set in advance by the control device 31.
is set by the manufacturer.

However, the hot water filling temperature and hot water filling amount will be determined at a later date.
The settings can also be changed by the manufacturer or user.

In this embodiment, when the hot water filling switch 41 is turned on, hot water filling work is automatically performed, but furthermore,
After the hot water filling work is completed, the sub controller 36 (described later)
The boiling/warming operation automatically shifts to the temperature set by the temperature setting switches 52 and 53, and when this is completed, the boiling/warming indicator lamp 42a, which was lit at the same time as the hot water filling switch 41 was turned on, goes out.

Further, when the boiling and warming work is completed, the bathing OK clamp 2b lights up and a buzzer sounds at bathing time 0.

The boiling/warming switch 42 automatically fills hot water and
This is used to raise the bath water temperature again to the set bath water temperature after the completion of the boiling/warming operation, for example, when the bath temperature drops during bath water, and by turning on the switch 42, The above-mentioned boiling and warming operations will be performed again.

By turning on the hot water filling reservation switch 43,
The above-mentioned hot water filling work and boiling/warming work can be performed at any time. The reserved time can be set by pressing the reserved time setting switches 438 to 43d, and the set reserved time is displayed on the digital display 43e.

When the freeze prevention switch 44 is turned on, the bath in the heat exchanger 11 is heated to a temperature sufficient for freezing prevention, for example, about 1
It is maintained at 0°C, and the freeze prevention indicator lamp 44a
will be lit.

In order to prevent the bath in the circulation flow path B from freezing, when the temperature in the bath becomes lower than a preset freezing prevention temperature, the circulation pump 18 is automatically turned on to circulate the bath in the circulation flow path B. conduct.

Further, the child lock switch 45, when turned on, disables the sub-controller 36 from changing the hot water supply conditions, and ensures safety by preventing changes to the hot water supply conditions due to mischief by children or the like. In addition,
When the child lock switch 45 is pressed again, the child lock will be released.

In addition, the sub-controller 36 installed in the bathroom is shown in Figure 3.
The detailed configuration of the sub-controller 36 includes an operation switch 46 and a hot water filling switch 47.
, boiling/warming switch 48 , freezing prevention switch 49 , difference switch 50 , and addition hot water switch 51
, bathtub temperature setting switches 52 and 53, and hot water quantity setting switches 54 and 55.

In this configuration, the operation switch 46, the hot water filling switch 47, the boiling/warming switch 48, and the freeze prevention switch 49 are connected to the main controller 35 described above.
The operation switch 40 and the hot water filling switch 41 in
, the boiling/warming switch 42 , and the freeze prevention switch 44 have similar functions, so a description of these functions will be omitted, and the functions of the other switches will be described below.

That is, the temperature setting switch 52 changes the set bath temperature (for example, 38°C) set by the control device 31 to 1°C or 2°C.
The temperature setting switch 53 can adjust the set bath temperature once adjusted to the lower temperature side by 1°C or 2°C. After setting the temperature using the temperature setting switches 52 and 53, turning on the hot water filling switch 47 automatically performs hot water filling, boiling, and warming operations. After such temperature adjustment and after a certain period of time has elapsed, by turning on the boiling/warming switch 48, the water can be heated to the set temperature and kept warm.

When the reheating switch 50 is turned on, it drives the circulation pump 1B and controls the circulation flow path B, regardless of whether the bath temperature has reached the temperature set in advance by operating the temperature setting switch 52 or 53. through heat exchanger 11
The high-temperature hot water that has been heat-exchanged is discharged and circulated into the bathtub 16 so that the temperature can be raised to the desired temperature.

In addition, by turning on the hot water switch 51,
The amount of hot water set by the hot water amount setting switches 54 and 55 can be additionally fed into the bathtub 16 through the hot water filling channel C after filling with hot water.

Further, to explain other configurations of the sub-controller 36, 56 is a digital water quantity display meter;
It consists of digits, and the last digit is a printed "0".

Then, by operating the 8M setting switches 54 and 55 to set the hot water filling amount, the hot water filling switch 4
When 7 is turned on, the set amount of hot water will be displayed digitally.

Further, 57 is a transition state display section for displaying the transition state of the hot water supply operation, and as the hot water supply operation transitions, the hot water fill indicator lamp 57a, boiling indicator lamp 57b,
The notification display lamp 57c will turn on.

Further, 58.40b is a combustion indicator lamp, which lights up during hot water supply combustion operation.

It should be noted that the sub-controller 36 can be installed somewhere other than near the bathtub.

The operation of supplying hot water to the bathtub 16 by the automatic water heater A having the above configuration will be described below.

Note that the hot water supply operation generally includes a hot water supply combustion operation, a hot water filling operation, a boiling/warming operation, a refilling operation, a boiling operation, and an addition hot water operation.

The sequence of each operation will be explained below.

[Hot water heating combustion operation]

Figure 4 shows the sequence of hot water supply combustion operation.

First, turn on the operation switch 40 of the main controller 35 or the operation switch 46 of the sub-controller 36 (
100).

If the hot water temperature value Tml measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater body 10 is lower than the hot water set temperature value Tsl set in the control device 31, (10
1) Turn on the fan motor and igniter of the oil burner 12 (102).

Thereafter, a pre-ignition time and a pre-ignition motor time are taken for approximately 7 seconds to eliminate unburned gas within the oil burner 12 (103).

Then, the oil supply pump SP is driven, and the oil burner 12
Oil is supplied to the tank (104) and combustion begins.

When combustion starts, the flame detection sensor, which is made of cadmium sulfide or the like and whose resistance value changes depending on the intensity of light, turns on (105Y), and the combustion indicator lamp 58 turns on (106).
).

The ignition is continued until approximately 5 seconds have elapsed after the combustion indicator lamp 58 has been turned on (107N), and after approximately 5 seconds have elapsed (107Y), the igniter is turned off (108).

If the flame detection sensor does not turn on (105N) and the ignition try time (for example, 5 seconds) has elapsed (109), the misfire alarm buzzer etc. will sound (110), and the fuel pump SP and igniter will stop. (110a).

After the post purge time (approximately 20 seconds) has elapsed (11
0bY), and the fan motor is stopped (110c).

Furthermore, the flame detection sensor continues to detect the combustion state as long as the combustion by the oil burner 12 continues (111).

However, if the flame detection sensor goes off (IIIN
), restart the ignition operation (116 N), and if the ignition turns on and off intermittently 3 or 4 times or more (116 N).
Y), it is determined that there is an abnormality in the fuel pump or igniter, and an alarm buzzer or the like (not shown) is immediately sounded (117).

Then, if the flame detection sensor continues to be in the ON state normally and the hot water temperature value T+++1 measured by the hot water temperature sensor 30 becomes equal to or higher than the hot water temperature setting value Tsl set in the control device 31 (112Y). , stop the fuel pump SP (113), and after the post purge time (approximately 20 seconds) has elapsed to discharge the remaining combustion gas (114).
Y), stop the fan motor (115).

Unless the operation switch 40, 46 is turned off, when the hot water temperature in the heat exchanger drops, the hot water combustion operation is automatically repeated according to the above sequence.

[Hot water filling work] Figure 5 shows the sequence of hot water filling operation.

First, the hot water filling switch 41 of the main controller 35
Alternatively, turn on the hot water filling switch 47 of the sub-controller 36 (120).

If the hot water temperature value Tml measured by the hot water temperature sensor 30 installed in the heat exchanger ll of the water heater body 10 is higher than or equal to the bath operation possible temperature value Ts2 set within the control value -31 (121Y), the three-way The switching valve 17 switches from the circulation flow path B to the hot water filling flow path C (122), and the solenoid valve 22
is turned on and opened (123).

As a result, the hot water filling pipe 20. Mixing valve 21. Mixed hot water flows into the register 24 through the solenoid valve 22 and the pole tap 23.

Note that here, the bath operation possible temperature value Ts2 is a value preset in the control device 31, and
It is a value that can be mixed with water from the branch water supply pipe 26 to obtain a predetermined boiling heat retention set temperature value Ts3 (for example, 38°C), for example, the boiling heat retention set temperature value T
It can be set at 40° C., which is a slightly higher temperature value than s3.

However, if the amount of water supplied from the branch water supply pipe 26 is initially set to zero, the bath operation possible temperature value Ts2 can also be made equal to the boiling heat retention setting temperature value Ts3.

On the other hand, if the measured hot water temperature value Tl11 does not reach the bath operation possible temperature value Ts2 (121N), the three-way switching valve 17 and the solenoid valve 22 are not operated and the hot water filling operation is continued.
, does not start.

Next, by turning on the three-way switching valve 17 and the solenoid valve 22, (1
22) (123), As the mixed hot water starts to flow into the hot water supply pipe 20 at the distern 24 and beyond, the water amount sensor 25 counts while integrating the amount of hot water (124)
.

Then, when the water level in the cistern 24 rises to a certain level, the lower limit float switch 27 is turned on (125Y).
, and after a predetermined period of time, for example 3 seconds, has elapsed according to the on-delay timer (126Y'), the circulation pump 18 is driven (127).

The lower limit float switch 27 was provided because
This is because if the circulation pump 18 is operated when the inside of the distern 24 is empty or at an extremely low water level, the suction force of the circulation pump 18 is strong, and thus a suction sound (unpleasant sound) is generated.

Further, the reason why the circulation pump 18 is not activated immediately after the lower limit float switch 27 is turned on but after the on-delay time is to prevent the lower limit float switch 27 from turning on and off frequently, that is, so-called chattering.

Then, along with the driving of the circulation pump 18, the hot water is passed through the hot water filling channel C to a boiling heat retention set temperature value Ts3 (for example, 3
Mixed hot water (8°C) is dispensed into the bathtub 16.

Then, the count value Q of the cumulative amount of hot water by the water amount sensor 25
c is the set hot water supply amount Qs preset by the control device 31
If it becomes equal to (128Y), the solenoid valve 22 is turned off and closed (129).

Next, the water level in the register 24 is lowered and the lower limit float switch 27 is turned off (130Y), and after a predetermined period of time, for example, 30 seconds has elapsed by the off-delay timer (131Y), the three-way switching valve 17 is turned off and the flow path is closed. of,
Switch from hot water filling channel C to circulation channel B (132)
.

Further, after the three-way switching valve 17 is turned off (132), the process automatically shifts to boiling and warming operations (see Fig. 6).

Furthermore, the hot water filling resequence in this embodiment is also characterized by the following configuration.

That is, while turning on the hot water filling switch 47 (12
0), the digital hot water amount display meter 56 on the sub-controller 36 displays the preset hot water amount (for example, 200
7 is displayed digitally (Sl).

Thereafter, as the water flow sensor 25 starts counting the cumulative amount of hot water (124), the current amount of hot water is digitally displayed in a countdown manner, for example, every 1 ON (i.e., 200j! -1907!・180j! . . .
1ri (SL).

Therefore, the user can visually and reliably recognize the hot water filling situation in real time.

In addition, if the set amount of hot water is dispensed into the bathtub 16 (128), "
The electric characters "O" are made to flash at intervals of, for example, 0.5 seconds.

Note that this blinking continues until the initial boiling time is completed (S2).

In addition, in this embodiment, when the measured hot water temperature value Tml is higher than the bath operation possible temperature value Ts2 (121Y), the three-way switching valve 17 and the solenoid valve 22 are turned on (121Y).
22) (123), with this solenoid valve 220 turned on,
The solenoid valve ON integration timer operates and the ON time of the solenoid valve 22 is integrated (135) for a predetermined period of time (for example, 90 minutes).
After the lapse of time, the solenoid valve 22 is turned off and the circulation pump 18 is turned on (136). At the same time, a warning lamp (not shown) is turned on (136^).

Incidentally, after the solenoid valve 22 is turned off and the circulation pump 18 is turned on (136), the lower limit float switch 27 is turned off.
37Y), the same off state has elapsed for the time set by the off delay timer, for example 30 seconds (138V)
Afterwards, the three-way switching valve 17 is turned off, and the circulation pump 1 is turned off.
8 is also turned off (139).

Furthermore, in this embodiment, the lower limit float switch 27
After the circulation pump 18 is turned on (136) along with turning on (135), the counted hot water amount reaches the set hot water amount (
Until 137), the hot water filling operation will be performed according to the following routine.

In normal operation, the discharge amount from the ball tap 23 is set to be larger than the suction amount of the circulation pump 18, and the flow rate in the cistern 24 is adjusted by opening and closing the valve inside the ball tap 23 as the ball tap 23 moves up and down. It turns out.

However, for example, if the suction capacity of the circulation pump 18 exceeds the discharge capacity from the ball tap 23 and as a result, the lower limit float switch 27 is turned off (140Y), the circulation pump 18 is turned off (141), the lower limit float switch 27 The circulation pump 18 will not be turned on until it is turned on again, thereby preventing unpleasant suction noise from occurring.

On the other hand, in normal operation, even if the lower limit float switch 27 does not turn off ('14ON), if the ball tap 23 cannot adjust the flow rate due to a malfunction of the ball tap 23 or the like and the water level rises abnormally, the upper limit float switch 27 is turned on (142Y), and the time set by the on-delay timer (for example, 0.5 seconds) has elapsed (
143Y), the solenoid valve 22 can be stopped after (143Y).
44).

Therefore, accidents such as overflow from the distern 24 can be reliably prevented.

When the upper limit float switch 28 is turned on, the solenoid valve 22 is immediately stopped, and when the upper limit float switch 28 is turned off again due to a drop in the water level, the off-delay timer is activated for, for example, 2 seconds, and the solenoid valve 22 is turned off. valve 22
You can also turn it on.

Thereby, chattering can be effectively prevented.

Also, if the upper limit float switch 28 does not turn on (1
42N) and while the on-delay time has not expired even if the upper limit float switch 28 is turned on (143N),
The solenoid valve 22 remains in the on state, and normal work will be performed (145).

Furthermore, in this embodiment, as shown in FIG. 5, when it is desired to end the operation with only hot water filling, after switching the three-way switching valve 17 (132), the off-delay timer allows a predetermined period of time, for example 60 seconds, to elapse. If not later (133
), the circulation pump 18 is prevented from stopping (1
34).

The off-day delay time is provided in this way, rather than in the above-mentioned operation mode that automatically transitions from hot water filling operation to boiling/warming operation. This is to prevent the mixed hot water from flowing back from the circulation path B to the hot water filling pipe 20 when the pump 17 is turned off at the same time, thereby preventing damage to the hot water filling pipe 20 due to freezing and the occurrence of an unhygienic condition.

The same sequence is also used when turning off the hot water supply in the middle of the hot water filling operation.

[Boiling/warming operation]

The boiling/warming operation is performed according to the sequence shown in FIG.

As shown in FIG. 6, in normal operation, after the hot water filling operation shown in FIG. Connection step in mid-interrupt (■).

That is, the bath is circulated through the circulation path B, and the bath water temperature sensor 2
The bath measured temperature value Ts+2 detected by step 9 is equal to or higher than the boiling heat retention set temperature value Ts3 set by the bathtub temperature adjustment switch 52-53 of the sub-controller 36 (150Y), and the temperature value Ts+2 detected by the bathtub temperature control switch 52-53 of the sub-controller 36 becomes equal to or higher than that (150Y), and the temperature value Ts+2 is set by the boiling-up detection timer. After the specified time (for example, 5 seconds) has elapsed (151Y), boiling is completed, and the circulation pump 18 is stopped and the hot water filling lamp 47 is turned off (152).

In addition, if the bath measured temperature value Tm2 is lower than the boiling heat retention setting temperature value Ts3, the temperature is continuously or periodically measured until the bath bath measurement temperature value Tl112 becomes equal to or higher than the boiling heat retention temperature setting value Ts3. Continue (15O
N).

It is determined whether it is the first time to boil or not, and if it is the first time to boil (153Y), the notification buzzer turns on (15
3A).

With this, it is possible to prevent the buzzer from sounding every time the boiling/warming operation is performed, which may cause discomfort to the user.

Then, normally, the boiling operation is automatically shifted to the warming operation (154Y).

Along with this transition, the bath OK clamp 2b of the main controller 35 lights up (155).

At the time of bathing θ, the lamp 42b is turned on, and the heat retention timer is activated (155a) to cause the bathwater temperature sensor 29 to measure the bathwater temperature at regular intervals (for example, 15 minutes) (156).
Bathroom measured temperature value Tm2 boils and heat retention set temperature value Ts3
If it is lower than that, turn off the bathing OK clamp 2b (157) and drive the circulation pump 18 for a predetermined period of time (for example, 5 seconds) (15B), unless the boiling/warming switch 42 or 48 is pressed again. (15
9N), or the first boil notification buzzer (153A
) until the thermal insulation operation continuation time (for example, 4 hours) counted by the thermal insulation operation continuation timer has elapsed (
16ON), returns to step (150)'' and repeats the boiling and warming operation (150) to (157).

On the other hand, in the bath temperature measurement based on the operation of the heat retention timer, if the bath temperature measurement value Tm2 is higher than the boiling heat retention set temperature value Ts3 (156Y), the bathing OK clamp 2b is held in the ON state.

Furthermore, when the boiling/warming switch 42 or 48 is artificially turned off (154N) (159Y), or when the warming operation continuation time has elapsed (16ON), the boiling/warming lamp 48a is turned off (161). ).

In addition, the reason why the keep-warm operation continuation time is measured by the keep-warm timer and the keep-warm operation is canceled when the time has elapsed is because the user forgets to turn off the boil-up/keep-warm switch 42 or 48. It is designed to automatically cancel even if the

Furthermore, in the above routine, the case where the heat retention operation is not performed (154N) refers to the case where it is artificially turned off, or the case where the additional hot water operation is performed by turning on the additional hot water switch 51 after the completion of boiling, and in this case, After the set additional amount of hot water is dispensed, the process ends without being kept warm.

In addition, in normal hot water supply operation, as mentioned above, after the hot water filling operation is completed, the boiling/warming operation is automatically performed (at the final end of the routine in Figure 5 and at the midway interrupt in Figure 6). In the connection step (■), the boiling and warming operations can be performed separately and independently from the hot water filling operation.

In this case, instead of the hot water filling operation, steps (162) to (165) of the sequence shown in FIG. 6 will be performed.

That is, first, the boiling/warming switch 42 of the main controller 35 or the boiling/warming switch 48 of the sub-controller 36 is turned on (162).

If the hot water temperature value Tml measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater body lO is higher than the boiling operation possible temperature value Ts4 set in the control device 31 (163Y), the circulation pump 18 Onshiku 164),
High-temperature water flows from the heat exchanger 11 to the bathtub 16 through the circulation flow path B.
The water flows into the bath while circulating, gradually raising the temperature of the bath.

However, if the measured hot water temperature value Tm2 does not reach the boiling operation possible temperature value Ts4 (163N), the circulation pump 18 is not turned on.

Note that here, the boiling operation possible temperature value Ts4 is a value preset in the control device 31, and is a temperature considerably higher than the predetermined boiling heat retention setting temperature value Ts3 (for example, 38°C), for example, 50'C. Can be set to .

Then, the circulation pump 18 is turned on (164), and after the pump initial time set by the pump initial timer has elapsed (165Y), step (164) is started.
50) to perform appropriate temperature control.

That is, until the pump initial time has elapsed, the appropriate temperature control (150) is not performed, and the output detected by the bath water temperature sensor 29 is ignored by the control device 31.

[Driving at high speed]

Reheating operation is when the bath temperature drops after filling, boiling, and keeping warm water, the user manually operates the sub-controller 36 from inside the bathtub 16 to raise the bath temperature to the appropriate temperature. Refers to driving performed in order to

The sequence of such reheating operation is shown in FIG.

First, operate the bath water temperature control switches 52 and 53,
Set the desired bath temperature.

Next, switch 50 of sub-controller 36
is turned on (170).

The hot water supply temperature value Toi1 measured by the hot water supply temperature sensor 30 installed in the heat exchanger ll of the water heater main body 10 is determined by the control device 31.
(171Y), the circulation pump 18 is turned on (172).
Through the circulation channel B, the heat exchanger 11 exchanges heat with the bathtub 16 and circulates the bathtub 1, gradually increasing the bathtub temperature.

However, if the measured hot water temperature value Tml does not reach the reheating operation possible temperature value Ts5 (171N), the circulation pump 18 is not turned on.

Here, the temperature value Ts5 that allows reheating operation is a value t preset in the control device 31, and is a temperature considerably higher than the predetermined boiling heat retention setting temperature value Ts3 (for example, 38°C), for example, 50°C. Can be set.

After the circulation pump 18 is turned on (172), the circulation flow path B
The bath temperature will be increased by circulating the bath, but the bath temperature measured by the bath water temperature sensor 29
2 becomes equal to or higher than the condition temperature for starting the timer count of the continuous timer described later, that is, the continuous timer start temperature Ts8 (1
73Y), when the reheating continuation timer starts operating and the time set by the timer (for example, about 10 minutes after the bath temperature reaches 40°C) has elapsed (174Y), or when the bath temperature value Tr@ 2 is higher than the reheating stop temperature value Ts6 preset in the control device 31 (
5Y) automatically turns off the circulation pump 18 (177) to prevent the risk of overheating.

Of course, the reheating switch 50 can be manually turned off according to the bather's preference before the reheating operation stop temperature value Ts6 is reached (177).

[Additional hot water operation]

Add hot water operation after filling hot water, boiling water, keeping warm, etc.
This is an operation in which when the amount of bath water decreases due to the use of bath water, a mixture of hot water with a boiling temperature retention temperature value Ts3 is supplied through the hot water filling channel C, and is substantially the same as the hot water filling operation shown in Fig. 5. It will be held in

However, it is necessary to set the amount of hot water to be added in advance, and this can be done by operating the hot water amount setting switches 54 and 55.

[Freeze prevention driving]

Freeze prevention operation is performed when the bathtub from the previous day is left in the bathtub 16, and if it freezes and expands, it may cause damage to the outbound piping 15.
This is intended to prevent rupture and damage to the return side piping 19 and heat exchanger ll.

That is, in FIG. 8, by first turning on the operation switch 40 in the main controller 35 or the operation switch 46 in the sub-controller 36, the antifreeze operation is performed by the following operation (180).

When the bath water temperature value Tll12 measured by the bath water temperature sensor 29 becomes lower than the bath water freezing prevention temperature value Ts7 (for example, 4° C.) (181N), the circulation pump 18 is turned on (1B2),
The bath water is circulated in the circulation channel B to prevent the bath from freezing.

Then, the bath water measurement temperature value Tm2 is the freezing prevention temperature value Ta2
(for example, 4° C.), the circulation pump 18 is turned off (184).

By repeating the above operations, it is possible to completely prevent the bath from freezing, and the energy consumption for this purpose can also be minimized.

In an automatic water heater having such a configuration, the present invention is characterized by a configuration that enables a reserved hot water filling operation.

That is, in the present invention, when the bath switch is first turned on and then the hot water filling reservation switch 43 is turned on, at that point, the bath switch, for example, the hot water filling switch 41 is turned on.
The operation of the boiling heat retaining switch 42 and the like is stopped, and then, when the reserved time set by the timer comes, the bath switch is turned on, and the reserved hot water filling switch 43 is also turned on to start the hot water filling operation.

Further, when the hot water filling reservation switch 43 is turned on with the bath switch in the off state, when the reserved time set by the timer comes, the hot water filling switch 43 is turned on and the hot water filling operation is started.

Additionally, if you first turn on the hot water filling reservation switch 43 and then turn on the bath switch, the bath switch on operation will not be accepted and will be ignored, but when the reserved time set on the timer comes, the bath will be turned on. The switch also
The hot water filling switch 43 is also turned on and hot water filling operation is started.

In this way, since each operational relationship between the hot water filling switch 43 and the bath switch is controlled depending on the operating destination, the automatic hot water supply reservation operation can be performed in a systematic manner without causing unnecessary confusion. This has the effect of making the use of machine A more convenient.

Further, FIG. 9 shows an automatic water heater according to another embodiment, and in this embodiment as well, hot water filling reservations can be made in the same manner.

In addition, as shown in FIG. 9, in another embodiment, the above-mentioned three-way switching valve 17 is not provided in the circulation flow path B, and instead, a hopper 24° is provided in the middle of the hot water filling pipe 20. , the terminal end is connected in communication with the downstream side of the circulation pump 18, and the water level sensor 17 is provided midway along the outgoing side distribution 15.

With this configuration, the heat exchanger 11-outgoing pipe 15-
A circulation flow path B can be formed from the bathtub 16, the return pipe 19, and the heat exchanger 11, and by driving the circulation pump 18, the bath in the bathtub 16 is circulated within the circulation flow path B. The bath water can be continuously heated by the heat exchanger 11 to boil it up and keep it warm.

On the other hand, by connecting the terminal end of the hot water filling pipe 20 and the downstream side of the outgoing pipe 15, when the circulation pump 18 is stopped, the heat exchanger 11→mixing valve 21
- It is possible to form a hot water filling channel C of a gravity flow type using only water pressure (head pressure after the hopper 24), which consists of the solenoid valve 22 → hopper 24 → outgoing pipe 15 → bathtub 16.

- Even in an automatic water heater with such a configuration, automatic operation can be performed by operating a controller similar to that shown in Figs. 2 and 3, and in automatic operation, the above-mentioned hot water filling reservation can be performed. Can be done in an orderly manner.

In addition, to explain the other configurations in FIG. 9, 27° is a pressure switch for preventing polluted water from the bath water after use from mixing with tap water, and 28° is a vacuum breaker 120a. An overflow pipe 30a is connected to the upper part of the hopper 24', and 30a is the main body 1 of the water heater.
This is a bimetal for preventing overheating of the can body.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram illustrating the configuration of an automatic water heater according to the present invention;
Figure 2 is an explanatory diagram of the configuration of the main controller, Figure 3 is an explanatory diagram of the configuration of the sub-controller, Figure 4 is a flowchart for hot water supply combustion operation, Figure 5 is a flowchart for hot water filling operation, and Figure 6 is a flowchart for boiling and keeping warm. FIG. 7 is a flowchart of the reheating operation, FIG. 8 is a flowchart of the antifreeze operation, and FIG. 9 is a conceptual diagram illustrating the configuration of an automatic water heater according to another embodiment. In the figure, A: Automatic water heater B: Circulation flow path C: Floor-filling flow path 1b Heat exchanger 15: Outbound side piping 16: Bathtub 18: Circulation pump 19: Return side piping 20: Hot water filling piping 40: Operation switch 41: Hot water filling switch 43: Hot water filling reservation switch Patent applicant: Totokiki Co., Ltd. Agent: Kenichi Matsuo

Claims (1)

[Claims] 1. The heat exchanger (11) and the bathtub (16) are connected to each other by an outgoing pipe (15) and a returning pipe (19) with a circulation pump (18) interposed in the middle. to form a circulation flow path (B),
In a one-can two-channel type automatic water heater in which a hot water filling pipe (20) for supplying mixed hot water for hot water filling is branched and communicated with an outgoing side pipe (15) to form a hot water filling flow path (C), A controller is connected to the control device (31) that controls automatic hot water supply, and the controller is equipped with a bath switch for supplying hot water to the bathtub (16) and a hot water filling reservation switch (which allows you to reserve the hot water filling operation using a timer). 43), and an automatic water heater having a hot water filling reservation function, in which the operation priority order according to the operation destination of the hot water filling reservation switch (43) and the bath switch is configured as follows. (b) If you turn on the bath switch first and then turn on the hot water filling reservation switch (43), the operation by the bath switch operation will stop at that point, and then when the reserved time set on the timer comes, the bath will be turned on. The switch is turned on, and the hot water filling switch (41) is also turned on to start hot water filling operation. (b) When the hot water filling reservation switch (43) is turned on while the bath switch is off, the hot water filling switch (41) is turned on and hot water filling operation is started when the reserved time set by the timer comes. (c) If you first turn on the hot water filling reservation switch (43) and then turn on the bath switch, the bath switch on operation will not be accepted and will be ignored, and when the reserved time set on the timer comes, the bath will be turned on. The switch is turned on, the hot water filling switch (41) is also turned on, and hot water filling operation is started.