JPH01222152A - Automatic hot-water supplier equipped with preferential operation mode switch - Google Patents

Abstract

PURPOSE:To effect systematic automatic hot-water supplying operation, by a method wherein hot-water filling operation is started and heat-up and temperature keeping operation are effected when a heat-up and temperature keeping switch is operated and a hot-water filling switch is operated, the operation is stopped when the heat-up and temperature keeping switch is operated while additional heating operation is started when an additional heating switch is operated and, then, the temperature keeping operation is effected when the additional heating operation is finished. CONSTITUTION:When a heat-up and temperature keeping switch 48 is operate and a hot-water filling switch 47 is operated later, hot-water filling operation is started and heat-up and temperature keeping operation are effected automatically and sequentially. When the heat-up and temperature keeping switch 48 is operated and, then, the same switch 48 is operated further, the heat-up and temperature keeping operation is stopped. When the heat-up and temperature keeping switch 48 is operated and, then, an additional heating switch 50 is operated, additional heating operation is started, thereafter, the temperature keeping operation is effected automatically when the additional heating operation is finished. An operation preferential order between the heat-up and temperature keeping switch 48 and other switches is controlled in such a manner whereby unnecessary disturbance will never be generated and systematic automatic hot-water supplying operation may be effected.

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 this automatic water heater, the heat exchanger in the water heater body is connected to the bathtub through the outgoing piping and the incoming piping to form a circulation flow path, and the outgoing piping of the circulation flow path is connected to the bathtub. A circulation pump is provided, and one end of the separately provided hot water piping is connected to the heat exchanger, and the other end is connected to the part of the outbound piping below the circulation pump via a solenoid valve and a hopper. Furthermore, it is characterized by a configuration in which a mixing valve is provided in the middle of the hot water filling piping, and a natural flow type hot water filling path is separately provided in addition to the circulation path. 'Also,
With this configuration, tasks such as filling hot water, boiling, and keeping warm water can be performed in the following manner.

In other words, when filling hot water, the circulation pump is stopped, the flow path is switched from the circulation flow path to the hot water filling flow path, and the high-temperature water that has been heat-exchanged in the water heater itself is used at its own pressure (tap water pressure). The water is then fed to a mixing pulp and mixed with water to produce hot water of an appropriate temperature (e.g. 38°C), and the appropriate amount of hot water is discharged into the bathtub by natural flow through the hot water filling piping, hopper, and the downstream side of the outgoing hot water supply pipe. This is done by the eel. Then, the water level switch is activated to stop driving the electromagnetic valve and stop dispensing hot water, completing the task of filling the set amount of hot water.

After that, boiling and keeping warm will be carried out,
This work is done by driving a circulation pump installed upstream of the outgoing piping to discharge high-temperature hot water that has undergone heat exchange in the water heater body through the outgoing piping into the bathtub, and also to discharge the hot water inside the bathtub through the incoming piping to the bathtub. This is done by forming a circulation flow by returning the water to the heat exchanger and raising the bath temperature in the bathtub to the set temperature. When the temperature reaches the set temperature, the circulation pump automatically stops driving and stops circulation, completing the boiling and warming work.

Complete.

(c) Problems to be Solved by the Invention When the conventional automatic water heater is further equipped with a reheating function to further raise the temperature of the bathtub after heating and keeping it warm, the controller , hot water switch,
Various switches will be provided, such as a boil-up switch, a warm-up switch, and a heat-up switch.

Therefore, unless the relationship between the previous and subsequent operations of these switches and the operation associated with each switch operation is clearly controlled, the automatic water heater will not be able to function satisfactorily.

An object of the present invention is to provide an automatic water heater that can solve the above 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, In a one-can, two-channel type automatic water heater in which hot water filling piping for supplying mixed hot water for hot water filling is branched and connected to the outgoing piping on the downstream side of the circulation pump to form a hot water filling flow path, a subcontroller is used. In addition, there is a hot water filling switch for filling the bathtub with hot water, a boiling/warming switch for boiling and keeping hot water in the bathtub, and a reheating switch for making the bathtub hotter. (a) If the boiling/warming switch is turned on first, and then the hot water filling switch is operated, the hot water filling operation will start. Priority is given to start, and automatic grape boiling and warming operation is performed rather than hot water filling operation.

(b) If you turn on the boiling/warming switch first, and then operating the same switch again, the boiling/warming operation will stop.

(c) If you turn on the boiling/keep-warming switch first, and then operate the reheating switch, the reheating operation will start, and when it ends, it will automatically return to the original keep-warm operation.

According to the automatic water heater having the preferential operation mode switch configured as follows: (e) Functions and Effects With the above-described configuration, the present invention has the following functions and effects.

Immediately, in the present invention, if the boiling/warming switch is turned on first, and then the hot water filling switch is operated, the hot water filling operation is given priority over the hot water filling operation via the hot water filling flow path. Boiling and warming operations are automatically carried out via the circulation flow path.

In addition, if you turn on the boiling/keep-warm switch ν and then operate the same switch again, the boil-warm operation will stop.

Furthermore, if you turn on the boiling/warming switch first and then operate the Oi-daki Sui/Sochi, the reheating operation will start, and when it ends, it will automatically return to the original warming operation and continue keeping warm. Become.

In this way, since the operating priority of boiling, warming switch, and other switches is controlled according to the operation destination, systematic automatic hot water heating operation can be performed without unnecessary confusion. It has the effect of making bathing more comfortable.

(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, while the hot water supply pipe 14
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 water level sensor 17 and a circulation pump 1 in the middle thereof.
Reference numeral 8 denotes an outbound piping, and 19 is a return piping whose starting end is connected to the bathtub 16 and whose terminal end is connected to 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 → return side piping 19 → 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 a mixing valve 21, a solenoid valve 22, a nozzle 23
It is connected to the downstream side of the outgoing pipe 15 through the hopper 24 and the hopper 24 .

With this configuration, 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 - solenoid valve 22 → nozzle 23 - Hopper 2
4 - Outgoing pipe 145 - Bathtub 16 can form a natural hot water filling channel C using only water pressure.

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 oil burner 12 of the main body IO of the water heater is driven with the circulation pump 18 stopped, and the mixing valve 21 and the solenoid valve 22 are opened, the hot water from the heat exchanger 11 is retained. The high-temperature hot water is supplied to the mixing valve 21 by water pressure, and in the mixing valve 21, the high-temperature hot water is mixed with water that is also supplied by water pressure through the branch water supply pipe 26 to generate a mixture of hot water and water at an appropriate temperature. For mixed hot water, hot water filled piping 20
, the solenoid valve 22, the nozzle 23, the hopper 24, and the downstream side of the outgoing pipe 15, and the hot water is discharged into the bathtub 16 by natural flow.

In addition, to explain other configurations in the illustrated embodiment, SP is a fuel supply pump that supplies fuel to the oil burner 12, and 27 is a pump that prevents polluted water from a bath, etc., from mixing with tap water after use. Pressure switch for, 28
is a vacuum breaker.

Moreover, 20a is an overflow pipe connected to the upper part of the hopper 24 in communication. 29 is the return side piping 1 of the circulation flow path B
This is a bath temperature sensor provided at 9, which measures the temperature of the bath water in the bathtub 16. On the other hand, 30 is the water heater main body 10
30a is a hot water supply temperature sensor disposed inside the heat exchanger 11, which measures the temperature of high-temperature hot water generated within the heat exchanger 11, and 30a is a bimetal sensor for preventing overheating of the can body of the water heater main body IO. It is.

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 17. A bath water temperature sensor 29, a hot water supply temperature sensor 30, and a bimetal 30a are connected.

On the other hand, the output interface 33 includes the circulation pump 18
．． A mixing valve 21, a solenoid valve 22, and a fuel supply pump SP are connected.

The memory 34 also stores information about the circulation pump based on output signals from the water level sensor 17, bath water temperature sensor 29, hot water temperature sensor 30, bimetal 30a, etc., as well as drive signals from various controllers 35 and 36, which will be described later. 18
．． A driving sequence program for driving the mixing valve 21, the solenoid valve 22, and the fuel supply pump SP is stored, and as described later, when there is an interrupt operation in the middle of the main routine, the operating condition immediately before that program is stored. It is possible to memorize hot water tap conditions.

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.

Note that the controller can also be installed in other locations.

By operating these controllers 35 and 36, predetermined drive signals or control signals are sent to the control device 31, and the circulation pump 1 is controlled based on the drive signals.
8. The mixing valve 21, the solenoid valve 22, the oil burner 12 (including the fuel supply pump SP), 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/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 W31, and the circulation pump 18. Various driving devices such as the mixing valve 21, the solenoid valve 22, and the fuel supply pump SP, and the water level sensor 17.
Power can be supplied to various sensors such as the bath water temperature sensor 29, the hot water supply temperature sensor 30, and the bimetal 30a.

Moreover, 40a is an operation display lamp that lights up when the operation switch 40 is turned on.

When the hot water filling switch 41 is turned on, it sends a drive signal to the l1lJ control unit 231, and based on the drive order program read from the memory 34, the circulation pump 18
．． Various driving devices such as the mixing valve 21, the electromagnetic valve 22, and the oil burner 12 (including the fuel supply pump SP) are driven to automatically fill, boil, and keep the water warm.

In addition, among the hot water supply conditions, the hot water filling temperature (e.g. 38℃)
and the amount of hot water (for example, in 2004, 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 addition, 41a and 47a are hot water filling indicator lamps, and 42a.

48a is a boiling heat retention indicator lamp, 43f is a hot water filling reservation indicator lamp, 44a and 49a are freezing prevention indicator lamps,
45a is a child lock indicator lamp, 50a is a reload indicator lamp, and 51a is a scaffold indicator lamp.

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 spout controller 36 (described later)
The boiling/warming operation automatically shifts to the temperature set by the temperature setting switches 52 and 53, and once 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 is used to automatically raise the bath water temperature to the set bath water temperature after the water filling/boiling/warming operation is completed, for example, when the bath temperature drops during bathing. By turning on the switch 42, the boiling and warming operations described above 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 43a to 43d, and the set reserved time is displayed on the digital display 43e.

By turning on the freeze prevention switch 44, 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 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 detailed configuration of the sub-controller 36 includes an operation switch 46 and a hot water filling switch 47.
, boiling/warming switch 48, and freeze prevention switch 7
49, a refill switch 50, and bathtub temperature setting switches 52 and 53.

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 water 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 toward the lower temperature side by 1°C or 2°C. And such temperature setting button 52.53
After making the settings, by turning on the hot water filling switch 47, hot water filling, boiling, and warming operations will be automatically performed.

Moreover, by turning on the boiling/warming operation switch 48 after a certain period of time has elapsed after the automatic hot water filling/boiling/warming operation is completed, the water can be heated to a set temperature and kept warm.

Next, by turning on the reheating switch 50, regardless of whether or not the bath temperature has reached the temperature set in advance by operating the temperature setting switch 52, 53.
The circulation pump 18 is driven to discharge and circulate high-temperature hot water heat-exchanged by the heat exchanger 11 into the bathtub 16 via the circulation flow path B.
It can be raised to the desired temperature.

Further, to explain other configurations of the sub-controller 36, reference numeral 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, the boiling indicator lamp 57b, notification display lamp 57^ It lights up at the time of rotation.

Note that the sub-controller 36 can be installed in other locations than near the bathtub 16.

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 freezing prevention 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).

The hot water temperature value Tl11 measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater main body 10 is determined by the control device 31.
If it is lower than the hot water supply temperature setting value Tsl set within (1
01) 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 fuel pump SP is driven.
Oil is supplied to the tank (104), and combustion starts. When combustion starts, the flame detection sensor, which is made of cadmium sulfide or the like and whose resistance value changes depending on the strength of light, turns on (105Y), and the combustion indicator lamp 58 turns on. Turn 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 (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).

Then, after the post barge time (about 20 seconds) has elapsed (11
0bY), 7y 7-F-Stop Ichiyo (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 is turned off (III
), restart the ignition operation (116N), and if the ignition is turned on and off intermittently 3 or 4 times or more (116Y).
), it is determined that there is an abnormality in the fuel pump or igniter, and an alarm buzzer or the like is immediately sounded (117).

Then, if the flame detection sensor normally maintains the on state and the hot water temperature value Tsl 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 ), oil pump s
113), and after the post purge time (approximately 20 seconds) has elapsed to exhaust the remaining combustion gas (114Y).
), the fan motor is stopped (115).

Unless the operation switch 40 of the main controller 35 or the operation switch 46 of the sub-controller 36 is turned off, if the hot water temperature in the heat exchanger 11 falls, 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).

When the hot water temperature value Tm1 measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater main body 10 is higher than or equal to the bath operation possible temperature value Tsl set in the control device 31 (121Y), And when the water level sensor 17 is off (122Y), the solenoid valve 22 is turned on and opened (122Y).
23), As a result, the hot water filling pipe 20. Mixing pulp 21. Solenoid valve 22. Mixed hot water flows into the bathtub 16 by gravity through the nozzle 23, hopper 24, hot water filling pipe 20, and outgoing pipe 15.

Note that here, the bath operation possible temperature value Tsz is a value preset in the control device 31, and
This 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 Tsr (for example, 38°C); for example, the boiling heat retention set temperature value Ts
It can be set at 40° C., which is a temperature value slightly higher than s.

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 Ts can also be made equal to the boiling heat retention setting temperature value Tss.

On the other hand, if the measured hot water temperature value Tml does not reach the bath operation possible temperature value Tsz (121N), the solenoid valve 22
does not operate and does not start filling with hot water.

Then, when mixed hot water and water at the set flow rate flow into the bathtub 16, the water level sensor 17 is turned on (124Y)L, and after that, the water level sensor on detection time (for example, 0.55 ec) set by the water level sensor on detection timer has elapsed. Later (125Y), the solenoid valve 22 is turned off and closed (
126) Complete the hot water filling operation.

In addition, in the above sequence, the reason why the water level sensor on detection time is provided is to prevent false detection.

Thereafter, when the electromagnetic valve 22 is turned off (126), the circulation pump 18 is turned on (127), and the boiling/warming operation is started to circulate the bath in the circulation channel B.

At the beginning of operation of the circulation pump 18, until a set time (for example, 60 seconds) has elapsed, the bath temperature Te12 measured by the bath water temperature sensor 29 is higher than or lower than the heat retention set temperature value. Regardless, without performing on/off control of the circulation pump 18 based on a comparison value with the appropriate temperature control CTm*rT3s, which will be described later.
The circulation pump 18 can be operated continuously (1
2B).

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

That is, in this embodiment, the heat exchanger l of the water heater main body 10
Even if the hot water temperature value Tm+ measured by the hot water temperature sensor 30 installed in the bath is higher than the bath operation possible temperature value Tsl set in the control device 31 (121Y), if the water level sensor 17 is turned on, (122N), it is determined that there is more hot water left in the bathtub 16 than the set amount from the previous day, or that the set amount of hot water has already been filled, and the circulation pump 18 is directly driven without performing hot water filling operation. , Start boiling/warming operation (122N).

Thereby, overflow from the bathtub 16 can be prevented.

Further, in this embodiment, when the solenoid valve 22 is turned on (1
23) The solenoid valve on integration timer operates and solenoid valve 2
129) and turn off the solenoid valve 22 after a predetermined time (for example, 90 minutes) has elapsed (130).
) and lights up a warning lamp (not shown) (13
1).

[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 (■).

The bath is circulated through the circulation flow path B, and the bath water temperature sensor 2
Bathroom measured temperature value TIl! detected by 9. is equal to or higher than the boiling heat retention set temperature value Ts3 set by the bathtub temperature 11 section switch 52.53 of the sub-controller 36 (140Y), and the time set by the boiling detection timer (for example, 5 seconds) After the elapse of (141Y), it is assumed that the boiling is completed, and the circulation pump 18 is stopped and the hot water filling lamp 47 is turned off (142).

In addition, the bath measured temperature value T1 is the boiling heat retention setting temperature value T.
If it is lower than s3, the temperature measurement is continued continuously or periodically until the bath measured temperature value Tsz becomes equal to or higher than the boiling heat retention setting temperature value Tss, and the circulation pump 18 is turned on.
Continuously operate (14 ON).

Thereafter, it is determined whether or not the first boiling has occurred, and if it is the first boiling (143Y), the notification buzzer is turned on (143A).

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 (144Y).

Along with this transition, the lamp 42b lights up at bath 0 on the main controller 35 (145).

When the bath OK clamp 2b lights up, the heat retention timer is activated (145^), and the bath water temperature sensor 29 is made to measure the bath water temperature at fixed time intervals (for example, 15 minutes) (146).
The bath measured temperature value T + w2 is the boiling heat retention setting temperature value Ts
If it is lower than s, turn off the bathing OK clamp 2b (147) and drive the circulation pump 18 for a predetermined period of time (for example, 5 seconds) (14B), and then the boiling/warming switch 42 or 48 is not pressed again. As long as (1
49N), or the first boil notification buzzer (143N)
Unless the heat retention operation continuation time (e.g. 4 hours) counted by the heat retention continuous operation timer after integrating from A) has elapsed (15ON), the process returns to step (140) and repeats the boiling/warm operation (140) to (147). ).

On the other hand, in the bath temperature measurement based on the operation of the heat retention timer, if the bath temperature measurement value T111 is higher than the boiling heat retention set temperature value Tsl (146Y), bathing is OK.
The lamp 42b is kept on.

In addition, when the boiling/warming switch 42 or 48 is artificially turned off (144N) (149Y), or when the warming operation continuation time has elapsed (150Y), the boiling/warming lamp 48a is turned off ( 151).

In addition, the reason why the heat retention timer measures the duration of the heat retention operation and cancels the heat retention operation when the time has elapsed is that the user can press the boil/warm switch 4.
Even if you forget to turn off 2 or 48, it is automatically canceled.

Furthermore, in the above routine, the case where the warming operation is not performed (144N) is the case where it is artificially turned off, and in this case, the boiling operation 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 hot water filling operation, steps (152) to (155) 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 (152).

The hot water temperature value T+w measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater main body 10 is the control device 31
If the boiling operation possible temperature value Ts set within (153Y) is higher, the circulation pump 18 is turned on (154
), high-temperature hot water flows from the heat exchanger 11 into the bathtub 16 while circulating through the circulation path B, gradually increasing the bath temperature.

However, if the measured hot water temperature value Tml does not reach the boiling operation possible temperature value Ts4 (153N), 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 bag 231, and is a temperature considerably higher than the predetermined boiling heat retention set temperature value Ts3 (for example, 38°C), for example, 50°C. It can be set to C.

Then, the circulation pump 18 is turned on (154), and after the pump initial time set by the pump initial timer has elapsed (155Y), step (154) is started.
40) to perform appropriate temperature control.

That is, until the pump initial time elapses, the appropriate temperature control 1ll (140) is not performed, and the output detected by the bath water temperature sensor 29 is ignored by the control device 31.

[Driver driving]

The reheating operation is used to raise the bath temperature to an appropriate temperature by manually operating the sub-controller 36 from inside the bathtub 16 when the bath temperature drops after filling, boiling, and keeping warm water. Refers to the driving performed.

The sequence of such chasing operation is shown in FIG.

First, the desired bath temperature is set by operating the hot water temperature adjustment switches 52 and 53.

Next, switch 50 of sub-controller 36
Turn on (160).

The hot water temperature value Tll1+ measured by the hot water temperature sensor 30 installed in the heat exchanger 11 of the water heater main body 10 is determined by the control device 3.
If the temperature is higher than the reheating operation enable temperature value Tss set within 1 (161Y), the circulation pump 18 is turned on.162
), the high-temperature hot water is circulated from the heat exchanger 11 to the bathtub 16 through the circulation path B, thereby gradually increasing the bath temperature.

However, if the measured hot water temperature value Tm+ does not reach the follow-up operation possible temperature value Ts5 (161N), the circulation pump 18 is not turned on.

Note that here, the temperature value Tss that allows reheating operation 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. It can be set to C.

After the circulation pump 18 is turned on (162), the circulation flow path B
The temperature of the bath is increased by circulating the bath in the bath, but the bath temperature measured by the bath water temperature sensor 29 is
When wt becomes equal to or higher than the condition temperature for starting the timer count of the retrieval continuation timer, which will be described later, that is, the retrieval continuation timer start temperature value Tss (163Y), the retrieval continuation timer starts operating,
The time set on the timer (for example, when the bath temperature is 40℃)
When approximately 10 minutes have passed since <164Y),
Alternatively, when the bath measured temperature value Tm2 becomes higher than the catch-up operation stop temperature value Ts& set in advance in the control device 31 (165Y), the circulation pump 18 is automatically turned off (167) 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 TS& is reached (167).

Of course, the Win pump 18 can also be turned off by manually turning off the reheating switch 50 (166) (167).

[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 in the return side piping 19 or heat exchanger II.

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

Bath water temperature value Tl1l measured by the bath water temperature sensor 29! When the temperature becomes lower than the bath water freezing prevention temperature Ts (for example, 4°C) (171N), the circulation pump 18 is turned on (172).
, the bath is circulated in the circulation channel B to prevent the bath from freezing.

Then, the measured temperature value T1 of the bath water is a high freezing prevention temperature value T5.
? -1 (e.g. 7°C) and higher (173Y)
, the circulation pump 18 is turned off (174).

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 this configuration, the present invention is characterized in that the order of operation of the operation switch between hot water filling operation and other operations is configured as follows.

(a) Turn on the boiling/warming switch 48 first,
After that, when you operate the hot water filling switch 47, hot water filling operation starts with priority, and boiling
Automatically performs heat retention operation.

(b) Turn on the boiling/warming switch 48 first,
After that, if you operate the same switch 48 again, the boiling
Stop warming operation.

(c) Turn on the boiling/warming switch 48 first,
When the reheating switch 50 is then operated, the reheating operation starts, and when it ends, the original warming operation is automatically resumed.

In this way, since the operation priority order of the boiling/warming switch 48 and other switches is controlled depending on which switch is operated, systematic automatic hot water heating operation can be performed without causing unnecessary confusion. It has the effect of making bathing more comfortable.

[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 figure, A: Automatic water heater B: Circulation channel C: Hot water filling channel 11: Heat exchanger 16: Bathtub 47: Hot water filling switch 48: Boiling/warming switch 50: Reheating switch 15', A No. 7 Figure 8

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),
Hot water filling piping (20) that supplies mixed hot water for hot water filling to the outgoing piping (15) on the downstream side of the circulation pump (18)
In a one-can, two-channel automatic water heater in which the hot water filling channel (C) is formed by branching and communicating the hot water filling channel (C), the sub-controller (36) includes a hot water filling switch (47) for filling the bathtub with hot water. and the boiling/warming switch (48
) and a reheating switch (50) for controlling the hot bath water, and the operation priority order of the boiling/warming switch (48) and other switches is as follows: An automatic water heater having a priority operation mode switch consisting of: (a) If you first turn on the boiling/warming switch (48) and then operate the hot water filling switch (47), hot water filling operation will start with priority, and hot water filling → boiling and warming operation will be automatically performed. Do it on purpose. (b) If the boiling/warming switch (48) is turned on first and then the same switch (48) is further operated, the boiling/warming operation is stopped. (c) If you turn on the boiling/keep warm switch (48) first and then turn on the boiling switch (50),
Reheating operation starts, and when it ends, it automatically returns to the original warming operation.