JPH01222155A - Automatic hot-water supplier provided with function of changing set hot-water filling amount - Google Patents

Abstract

PURPOSE:To permit the change of the filling amount of hot-water properly, by a method wherein a controller is provided with a digital hot-water amount indicating meter and an increasing or decreasing hot-water amount setting switch and the changing mode of the set hot-water filling amount is effected by the control of increasing or decreasing operation of the hot-water amount setting switch while the finishing of the change of the changing mode of the same is effected by a hot-water filling switch. CONSTITUTION:When a hot-water filling amount is set by operating hot-water amount setting switches 54, 55 of a sub controller 36, a hot-water filling switch 47 is put ON and the set amount of hot-water is indicated in digital. The change of hot-water filling amount is effected by a method wherein the '0' of second order of a digital hot-water amount indicating meter 56 is lighted when an operation switch 46 is pushed, an already set hot-water filling amount is indicated in the digital hot-water amount indicating meter 56 under flashing condition when the hot-water amount setting switches 54, 55 are pushed simultaneously for more than 3sec, for example, then, a hot-water filling amount changing mode is called up and the value of the amount of hot-water is increased or deceased by operating the hot-water amount setting switches 54, 55. When the hot-water filling switch 47 is pushed after setting a desired hot-water filling amount, the entry of new hot-water filling amount is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a one-can, two-channel type automatic water heater in which the same water heater is connected to a bathtub through a circulation channel and a hot water filling channel.

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

In such an automatic water heater, a heat exchanger in the water heater main body is connected to the bathtub through outgoing piping and incoming piping to form a circulation flow path, and the circulation flow path is placed midway through the outgoing piping. A pump is provided, and one end of a separately provided hot water piping is connected to the heat exchanger, and the other end is connected to a portion of the outgoing piping upstream of the circulation pump via a three-way switching valve, Furthermore, a mixing valve is provided in the middle of 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 A'lJk generated in the water heater body is fed to the mixing valve to mix water. This is done by generating hot water at an appropriate temperature (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 switching the hot water supply flow path from the hot water filling flow path to the circulation flow path by driving the three-way switching valve, and discharging the high-temperature hot water that has been heat exchanged in the water heater body directly into the bathtub through the outgoing piping. This is done by forming a circulating flow by returning the bath water to the heat exchanger through the return piping, and raising the bath temperature in the bathtub to the set temperature. and,
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, the amount of hot water filled is set at a constant value beforehand at the time of shipment from the factory, and the user sets the amount of hot water filled every time the hot water is filled. There are some that allow you to do this every time.

However, if the bathtubs have different sizes, setting the amount of hot water to be constant in advance is not universal. Therefore, it is necessary for the user to be able to change the preset hot water filling amount according to the size of the bathtub.

(d) Means to solve the problem The present invention connects the heat exchanger and the bathtub in communication with the outgoing piping and the incoming piping with a circulation pump interposed in the middle to form a circulation flow path, The hot water filling piping that supplies mixed hot water for hot water filling is branched and communicated with the outbound piping to form a hot water filling flow path, and the automatic hot water supply operation is controlled by operating various switches provided on the controller. In this one-can, two-channel automatic water heater, the controller is equipped with a digital hot water quantity display meter and a hot water quantity setting switch for increasing/decreasing the amount of hot water added to the bathtub. , it is configured to be able to call up a change mode for the amount of hot water that has already been filled, and furthermore, the change mode is configured to be performed by increasing/decreasing operation of the hot water amount setting switch, and the change in the change mode is completed when the bathtub This invention relates to an automatic water heater having a function of changing the set amount of hot water filled with hot water, which is configured so that the hot water filling operation is performed using a hot water filling switch.

(E) Actions and Effects In this invention, when filling a bathtub with hot water, it is done by operating a hot water filling switch provided on the controller, but the amount of hot water filling is not fixedly set in advance. Therefore, a predetermined amount of hot water is filled according to the number of positions on the digital hot water amount display hand that displays the amount of hot water.

However, if you want to change the fixed amount of hot water, you must first set the water amount setting switch for increasing or decreasing the amount of hot water that would normally be used to set the amount of hot water added when adding hot water to the bathtub.
Both units are operated at the same time.

This calls up a change mode in which the fixed amount of hot water is to be changed.

Next, the desired new amount of hot water is set by operating the hot water amount setting switch to increase or decrease as appropriate.

Finally, by pressing the hot water filling switch, which would normally be used for hot water filling operation, the change mode for setting a new hot water amount is completed, and a fixed hot water amount setting has been made.

Therefore, even if the hot water filling amount is set fixedly at the time of factory shipment, the set hot water amount can be easily changed by using switches for other functions provided on the controller.

Example) The present invention will be specifically explained below based on the example 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 clean water is supplied into the outer can 11b of the heat exchanger 11 through the water supply pipe 13.
4, the hot water will flow through the shower, shower, etc. (not shown)
will be sent to.

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 terminal end of the hot water filling pipe 20 is passed through a mixing valve 21, a solenoid valve 22, a ball tamp 23, a distern 24, and a water flow sensor 25. ,
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 21→electromagnetic valve 22→ball tap 23→displacement 24
-Water flow sensor 25-Three-way switching valve 17-Outgoing pipe 15→
A hot water filling channel C consisting of the circulation pump 18 and the bathtub 16 can be formed.

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 tube 11a of the heat exchanger 11 is small. This is because a large amount of hot water is required at a certain set temperature for filling the boiling water, and because the temperature rise during boiling is minimized so that a large heat exchange capacity is not required. 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 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 upstream side of the outgoing pipe 15, and the circulation pump 18. That will happen.

Further, to explain other configurations in the illustrated embodiment, 27 is a lower limit float swine, which is used to ensure a certain amount of mixed hot water in the distern 24 and prevent the generation of drawing sounds etc. .

On the other hand, 28 is an upper limit float switch, which is originally used to adjust the water level using the ball tap 23, but is used to prevent overflow from the distiller 24 in the event that the ball tap 23 fails.

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 the heat exchanger 11 of the water heater main body lO
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 temperature sensor 29 and a hot water 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 sequence program for driving the mixing valve 21° oil supply pump SP, solenoid valve 22, etc. is stored, and as described later,
When an interrupt operation occurs during the main routine, the immediately preceding 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 31 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 oil burner 12 (including the oil supply pump SP) and the three-way switching valve are controlled. 17. Circulation pump 18. The mixing valve 21, the electromagnetic valve 22, etc. can be driven.

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/warming switch 42, a hot water papier-mâché switch 43, and a freeze 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°, the circulation pump 1B, the mixing valve 21, and the solenoid valve 2 are activated.
Various drive devices such as 2 and water flow sensors 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 40b 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 and keeping warm indicator lamps, and 43f is a hot water filling reservation indicator lamp. , 44a
, 49a is a freeze prevention indicator lamp, 45a is a child lock indicator lamp, 50a is a tailgate indicator lamp,
51a is a supplementary bath display 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
? , 18.21.22, to automatically fill the hot water.

In addition, among the hot water supply conditions, the hot water filling temperature (e.g. 38℃)
and the amount of hot water (for example, 20 (M) 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 reset by the manufacturer or the user as described below.

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.

Furthermore, when the boiling and warming work is completed, the bathing OK lamp 42b lights up and the bathing OK buzzer sounds.

The boiling/warming switch 42 automatically fills with hot water,
This is used to raise the bath water temperature again to the set bath water temperature after the completion of the boiling and heat retention operation, for example, when the bath temperature drops during the bath.By turning on the switch 42, the above-mentioned The work of boiling and keeping the water warm will be carried out again.

By turning on the hot water papier-mâché switch 43,
The above-mentioned hot water filling work, boiling, and keeping warm work can be done during urgent hours. The reserved time can be set by pressing the reserved time setting switches 43a to 43d, and the set reserved time is displayed on the digital display 43e.

When turned on, the freeze prevention switch 44 maintains the bath in the heat exchanger 11 at a temperature sufficient for freezing prevention, for example, about lθ°C, and the freeze prevention display lamp 44
A will light up.

In addition, the freezing prevention of the bath in the circulation flow path B is performed by automatically turning on the circulation pump 18 to circulate the bath in the circulation flow path B when the temperature in the bath becomes lower than a preset freezing prevention temperature. .

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 sub-controller 36 includes an operation switch 46 and a hot water supply switch 47.
, boiling/warming switch 48 , freezing prevention switch 49 , reheating switch 5o , 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 4o and the hot water filling switch 41
, 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.

Further, the temperature setting switch 52 can adjust the set bath temperature (for example, 38°C) set by the control device 31 to a higher temperature side by l'c or 2°C, and once the temperature setting switch 53-1 is adjusted, The set bath temperature can be adjusted lower by 1°C or 2°C. After setting the temperature with the temperature setting switches 52 and 53, by turning on the hot water filling switch 47, hot water filling, boiling, and warming operation can be performed automatically. After the time has elapsed, by turning on the boiling/warming switch 48, the water can be heated to the set temperature and kept warm.

When turned on, the reheating switch 50 drives the circulation pump 18 to open the circulation flow path B, regardless of whether the bath temperature has reached the temperature previously set by operating the salinity 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, when the amount of hot water is set by operating the hot water amount setting switches 54 and 55, the hot water filling switch 4
When 7 is turned on, the set amount of hot water will be displayed digitally.

That is, by using the hot water amount setting switches 54 and 55, not only the amount of hot water to be added, but also the amount of hot water that can be added by the user etc. due to the size of the bathtub 1G (for example, 2004) or less, as explained below. In this case, the amount of hot water added can be changed as appropriate.

In this embodiment, the amount of hot water to be filled is changed as follows.

First, when you press the operation switch 46, the digital water quantity display meter 5
The two digits “0” of 6 lights up.

Next, press the hot water amount setting switches 54 and 55 at the same time, and keep pressing them for, for example, 3 seconds or more. As a result, the digital 2J% amount indicator 56 displays the preset hot water filling amount in a blinking state. Note that this operation calls up the hot water filling amount change mode.

Thereafter, one of the hot water amount setting switches 54 and 55 is operated to increase or decrease the hot water amount value. Note that if either of the hot water amount setting switches 54, 55 is held down for, for example, 0.5 seconds or more, the hot water amount will increase or decrease by a fixed amount every 0.5 seconds.

Further, any hot water amount setting switch 54. '55 3
If you press the button continuously for seconds, the amount of hot water will increase or decrease by a certain amount every 0.25 seconds.

After setting the desired amount of hot water, the user presses the hot water filling switch 47 to complete entry of a new amount of hot water.

Note that after entry, the new hot water filling amount is recorded in the memory 34 even if the operation switch 46 is turned off.

Note that if the above change operation is not completed within 10 seconds from the change mode calling time, the change mode is cleared and remains at the initial setting.

This is done in consideration of a case where an attempt was made to change the amount of hot water filled, but the user reconsidered that the amount of hot water filled before the change was still desirable.

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 filling indicator lamp 57a1, the boiling indication lamp 57b,
The notification display lamp 57c will turn on.

Further, 5B and 40b are combustion indicator lamps, which are lit during hot water supply combustion operation.

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 reheating operation, and a hot water addition operation, each of which will be briefly 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 IO 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-fan motor time are taken for approximately 7 seconds to eliminate unburned gas in 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).
).

Note that 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 (10B).

If the flame detection sensor does not turn on (105111) and the ignition try time (for example, 5 seconds) has elapsed (109),
A misfire warning buzzer etc. sounds (110), and the fuel pump SP and igniter stop (110a).

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

Further, 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 (116N), if the ignition turns on and off intermittently 3 or 4 times or more (116Y).
), it is determined that there is an abnormality in the hot water 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 TI+11 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 and igniter (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).

(
121Y), the three-way switching valve 17 switches from the circulation channel B to the hot water filling channel C (122), and the solenoid valve 22 turns on and opens (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 ball tap 23.

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)
.

When the water level in the register 24 rises to a certain level, the lower limit float switch 27 is turned on and the 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).

Then, as the circulation pump 18 is driven, mixed hot water at a set hot water filling temperature (for example, 38° C.) is discharged into the bathtub 16 through the hot water filling channel C.

Then, the count value O of the cumulative amount of hot water by the water amount sensor 25
c is the set hot water supply amount ΩS 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. , 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 quantity display meter 56 on the sub-controller 36 sets the hot water filling N (for example, 200
6) is displayed digitally (Sl).

After that, when the water flow sensor 25 starts counting the amount of water (124), the current amount of hot water is digitally displayed in a countdown manner for each IOJ, for example.
That is, 20On・1901・1801・・・・0#
) (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 Ts1 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), along with turning on this solenoid valve 22,
The solenoid valve ON integration timer operates and the solenoid valve 220 ON time 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 (136A).

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 (138Y)
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
(135) and after the circulation pump 1B is turned on (136)? Hot water filling operation is performed according to the following routine until the amount A reaches the set amount of hot water (137).

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 pole tap 23 as the ball tap 23 moves up and down. You will be killed.

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 turns off (Y) (140v)
, the circulation pump 18 is turned off (141), and the circulation pump 18 is not turned on until the lower limit float switch 27 is turned on again. This can prevent unpleasant suction noise from occurring.

On the other hand, in normal operation, even if the lower limit float switch 27 does not turn off (14 ON), if the ball tap 23 is unable to 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 28 will turn off. 142Y), the time set by the on-delay timer (for example, 0.5 seconds) has elapsed (14
After 3Y), the solenoid valve 22 can be stopped (144
).

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

Also, 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 on. It is also possible to do this. Which one can effectively prevent chattering.

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 only the hot water filling operation is desired to be completed, after switching the three-way switching valve 17 (132), the off-delay timer is used to stop the operation after a predetermined period of time, for example 60 seconds, has elapsed. If not (133)
, the circulation pump 18 is stopped (134)
.

The off-day delay time is provided in this way, rather than in the above-mentioned operation mode where hot water filling operation automatically shifts to boiling/warming operation, and when you want to end the hot water filling operation only. This is to prevent the mixed hot water from flowing backward from the circulation path B to the hot water filling pipe 20 when the pump 18 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
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 is set by the boiling detection timer. After the specified time (for example, 5 seconds) has elapsed (151Y), the boiling is completed and the circulation pump 1 is turned off.
8 stops, 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 Tm2 becomes equal to or higher than the boiling heat retention temperature setting value Ts3. Continue (15ON)
.

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 bathing OK lamp 42b of the main controller 35 lights up (155).

As the bathing OK lamp 42b lights up, the heat retention timer is activated (155a), and the bathwater temperature sensor 29 is made 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 lamp 42b (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), return to step (150) and boil.
The heat retention operation is repeated (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 lamp 42b is kept 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). ).

Furthermore, in the above routine, the case where the heat retention operation is not performed (154N) refers to the case where it is turned off artificially or the case where the additional hot water operation is performed by turning on the additional hot water switch 51. In this case, the set additional hot water amount is After the hot water is dispensed, it 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.

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).

The hot water supply temperature value T+++1 measured by the hot water supply temperature sensor 30 installed in the water heater body lOO heat exchanger 11 is determined by the control device 3.
1 (163Y), the circulation pump 18 is turned on.164
), high-temperature hot water flows from the heat exchanger 11 into the bathtub 16 while circulating through the circulation path B, gradually increasing the temperature of the bathwater.

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

Note that here, the boiling operation possible temperature value Ta4 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.

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, the appropriate temperature control (15G) is not performed until the pump initial time has elapsed, and the output detected by the bath water temperature sensor 29 is ignored by the control device 31.

[Driving at high speed]

The continuous operation is when the bath temperature drops after filling, boiling, and keeping warm the water, and the user manually operates the sub-controller 36 from inside the bathtub 16 to raise the temperature of the bath water to an appropriate temperature. This refers to driving for the purpose of saving money.

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 water temperature.

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

If the hot water measurement temperature Tel by the hot water temperature sensor 30 installed in the heat exchanger ll of the water heater body 10 is higher than the reheating operation possible temperature value Ts5 set in the control device 31 (171Y), the circulation pump 18 Onshiku 172),
The heat exchanger 11 exchanges heat between the bath water and the bathtub 16 through the circulation channel B, and the temperature of the bath water is gradually increased.

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

Note that here, the temperature value Ts4 that allows reheating operation is a value preset in the control device 31, and is a temperature that is 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 temperature of the bath is increased by circulating the bath in the bath, but the temperature value Tl detected by the bath temperature sensor 29
When l12 becomes equal to or higher than the condition temperature for starting the timer count of the retrieval continuation timer described later, that is, the retrieval continuation timer start temperature value Ts8 (173Y), the retrieval continuation timer starts operating,
The time set on the timer (for example, when the bath temperature is 40℃)
When about 10 minutes have passed (174Y),
Alternatively, when the measured bath temperature value 7m2 becomes higher than the reheating operation stop temperature value Ts6 preset in the control device 31 (175Y), the circulation pump 18 is automatically turned off (177) and the high temperature is Prevent the risk of becoming too much.

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 the bathhouse, a mixed hot water with a boiling heat retention temperature setting 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 done.

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 bursting and damage to the return side piping 19 and the heat exchanger 11.

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 Tn+2 measured by the bath temperature sensor 29 becomes lower than the bath freeze prevention temperature value Ts7 (for example, 4°C) (
181N), i Turn on the ring pump 18 1B2),
The bath water is circulated in the circulation channel B to prevent the bath from freezing.

Then, the bath measured temperature value Tm2 is the freezing prevention temperature value Ts7.
(for example, 4° C.) (183Y), 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 addition, in this embodiment, during such hot water supply operation, the operation switch 46. By using the hot water filling switch 47 and the hot water amount setting switches 54 and 55, it is possible not only to set the addition VII amount, but also to easily set a new hot water filling amount when necessary.

[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, and FIG. 8 is a flowchart of the antifreeze operation. In the diagram, A: Automatic water heater B: Circulation flow path C: Automatic water heater 11: Automatic water heater 16: Bathtub 47: Hot water filling switch 48: Boiling/warming switch 50: Reheating switch 51: Adding hot water switch 54: Hot water amount setting switch 55: Hot water amount setting switch

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),
The hot water filling pipe (20) for supplying mixed hot water for hot water filling is branched and communicated with the outgoing side piping (15) to form a hot water filling flow path (C), and automatic hot water supply is performed by operating various switches provided on the controller. In a one-can, two-channel automatic water heater configured to control operation, the controller (36) is equipped with a digital hot water quantity display meter (56).
In addition, there are also water volume setting switches (54) and (55) for increasing and decreasing the amount of hot water to be added to the bathtub (16). It is configured so that a mode for changing the set amount of hot water can be called up, and furthermore, the changing mode is configured to be performed by increasing/decreasing operation of the hot water amount setting switch (54) (55),
Moreover, the automatic water heater has a function of changing the set amount of hot water filled so that the change of the change mode is completed by using a hot water filling switch (47) that performs the operation of filling hot water into the bathtub (16).