JP3331155B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hot water supply device for supplying hot water to a bathtub.

[0002]

2. Description of the Related Art Conventionally, there has been known a hot water supply apparatus in which a hot water supply pipe is connected from a water heater to a bathtub, and hot water heated to a predetermined temperature by the water heater is supplied to the bathtub.

Usually, the predetermined temperature is set to a temperature suitable for bathing (for example, 40 ° C.). Then, after the hot water of a temperature suitable for bathing is supplied in this way, when the temperature of the hot water in the bath tub decreases with time, the hot water in the bath tub is raised again to an appropriate temperature. There is also a hot water supply device having a so-called reheating function of directly heating.

On the other hand, in a hot water supply device having no reheating function, a temperature higher than a temperature suitable for bathing (for example, 8
0 ° C) hot water is supplied to the bathtub to raise the temperature of the bathtub, which is lowered. The so-called high-temperature hot water supply function is provided, and a hot water filling mode in which the bathtub is supplied at a temperature suitable for bathing. In some cases, the mode is switched to a high-temperature hot water mode for raising the temperature, and hot water is supplied to the bathtub.

[0005] However, when the user is in the bath tub and supplies hot water to the bath tub at a high flow rate (the same flow rate as when the hot water is filled) in the high-temperature hot water mode, the user particularly enters the bath tub. When a person takes a bath near the hot water supply port, the heat gives the user discomfort.

There is also a hot water supply device having a so-called water supply function for lowering the temperature of hot water in a bath tub by supplying water to the bath tub. When the water is supplied to the user, the coldness causes discomfort to the user.

Therefore, in order to prevent the user from feeling such discomfort, a water flow control valve is provided in the hot water supply pipe to the bathtub, and the flow rate of the hot water or the water flow to the bathtub is reduced by the water flow control valve. Some hot water and hot water are supplied.

[0008] Then, when the mode is switched to the normal mode after the hot water supply or the water supply is performed, the decrease in the hot water supply flow rate by the water flow control valve is stopped.

By the way, at the time when the high-temperature hot water supply is completed, high-temperature hot water is stored in a hot water supply pipe from the water heater to the bathtub. Then, when the user starts hot water supply in the hot water filling mode, for example, when the amount of hot water in the bathtub becomes low, the user has thought that hot water supply at a temperature suitable for normal bathing is performed. On the contrary, there is a disadvantage that high-temperature hot water in the hot water supply pipe is supplied to the bathtub at a large flow rate, and the heat of the supplied hot water causes discomfort to the user during bathing.

[0010] Similarly, at the time when the water supply is completed,
Water is stored in the hot water supply pipe from the water heater to the bathtub. Then, when the user starts hot water supply in the hot water filling mode, for example, when the amount of hot water in the bathtub becomes low, the user has thought that hot water supply at a temperature suitable for normal bathing is performed. On the contrary, the water in the hot water supply pipe is supplied to the bathtub at a large flow rate, and the coldness of the supplied water gives a disadvantage to a user who is taking a bath.

[0011]

SUMMARY OF THE INVENTION The present invention is to provide a hot water supply apparatus which solves the above-mentioned inconveniences and prevents a user who is taking a bath in a bathtub from causing discomfort due to supply of high-temperature hot water or water. The purpose is to:

[0012]

According to a first aspect of the present invention, there is provided a water supply pipe provided with a water flow control valve and connected to a bathtub, and supplying hot water to the water supply pipe. A hot water supply, a hot water supply mode for supplying hot water from the hot water supply to the bathtub, a high-temperature hot water supply mode for supplying high-temperature hot water for raising the temperature of hot water in the bathtub, and a hot water supply system for supplying hot water at a temperature suitable for bathing. Hot water supply mode switching means for switching to the hot water supply mode, hot water supply control means for controlling the temperature of hot water from the water heater in accordance with the hot water supply mode switched by the hot water supply mode switching means, and wherein the hot water supply mode is the hot water supply mode. In the hot water supply apparatus comprising: a first flow rate control means for controlling the water flow control valve to reduce the flow rate of hot water to the bathtub; By means The hot water supply mode, when switched from the high temperature feed water mode to the water filling mode, after the start hot water in該湯tension mode, residence in the hot water supply pipe
It is necessary for the retained hot water to be discharged into the bathtub.
A second flow rate limiting control means for controlling the water amount control valve to reduce the flow rate of hot water to the bath tub during the first predetermined time period is provided.

When the hot water supply to the bathtub in the high temperature hot water supply mode is completed, high temperature hot water is accumulated in the hot water supply pipe. In this state, when the hot water supply mode is switched from the high-temperature hot water supply mode to the hot water filling mode and hot water is supplied, before the hot water is supplied at a temperature suitable for bathing, the hot water supply pipe is inserted in the hot water supply pipe for a short time. The accumulated hot water is supplied to the bathtub.

In such a case, according to the present invention, the second
By the flow rate control means, the flow rate of hot water to the bathtub is reduced during the first predetermined time from the start of hot water supply in the hot water filling mode. Therefore, high-temperature hot water stored in the hot water supply pipe is supplied to the bathtub at a large flow rate (flow rate at the time of hot water filling), and discomfort is caused to a user who is bathing in the bathtub due to the heat of the supplied hot water. Can be prevented.

According to a second aspect of the present invention, there is provided a hot water supply pipe provided with a water amount adjusting valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, and detecting a flow rate of hot water to the bathtub. A flow rate sensor, a hot water supply accumulating means for calculating a cumulative value of the amount of hot water supplied to the bathtub from a detection value of the flow rate sensor, and a hot water supply mode for supplying hot water from the water heater to the bathtub to raise the temperature of hot water in the bathtub. A hot water supply mode for switching between a hot water supply mode for supplying hot water and a hot water supply mode for supplying hot water having a temperature suitable for bathing; and a hot water supply mode switched by the hot water supply mode switching means. Hot water supply control means for controlling the temperature of hot water from the water heater, and a first flow rate limiting control for controlling the water flow rate control valve to reduce the flow rate of hot water to the bathtub when the hot water supply mode is the hot water supply mode. Water heater equipped with means In, after the hot water supply completion at the high temperature feed water mode, by the hot-water supply mode switching means, said hot water supply mode, when from the hot feed water mode is switched to the water filling mode, starting the hot water supply in 該湯 tension mode After that, the hot water accumulating means stays in the hot water pipe.
Until the accumulation of the predetermined hot water supply amount corresponding to the amount of the hot water that has been heated is calculated, a second flow rate restriction control means for controlling the water flow control valve to reduce the flow of hot water to the bathtub is provided. And

According to the present invention, when the hot water supply mode is switched to the hot water filling mode after the hot water supply in the high temperature hot water supply mode is completed, the hot water supply accumulating means starts from the hot water supply in the hot water filling mode. Until the accumulation of the predetermined hot water supply amount is calculated by the second flow rate limiting control means,
The flow rate of hot water supply to the bathtub is reduced.

Therefore, as in the first embodiment , hot water stored in the hot water supply pipe is supplied to the bathtub at a large flow rate (flow rate at the time of hot water filling), and supplied to a user who is bathing in the bathtub. The discomfort caused by the hot water can be prevented.

In the first and second aspects , the second flow rate limiting control means may be arranged so that the hot water retained in the hot water supply pipe after the hot water supply in the high-temperature hot water supply mode is terminated by the user.
Is required to cool naturally to the point where it does not feel hot
Operable only until a second predetermined time elapses.

When a certain period of time has elapsed after the hot water supply in the hot water supply mode has been completed, the hot water stored in the hot water supply pipe is naturally cooled to a temperature lower than the hot water supply temperature in the hot water filling mode. In this case, even if the hot water in the hot water supply pipe is supplied to the bathtub at a large flow rate, the user does not feel uncomfortable.

According to the present invention, the second predetermined time is set to such a time that the high-temperature hot water in the bathtub is naturally cooled, and after the hot water supply in the high-temperature hot water supply mode is completed, the second predetermined time is set. (2) Since the second flow rate control means can be operated only until the predetermined time elapses, the hot water supply flow rate in the hot water filling mode is not unnecessarily reduced.

According to a third aspect of the present invention, there is provided a hot water supply pipe provided with a water amount adjusting valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, and a hot water supply from the water heater to the bathtub. Hot water supply mode switching means for switching between a hot water supply mode for supplying water to lower the temperature of hot water in a bathtub and a hot water supply mode for supplying hot water having a temperature suitable for bathing; Hot water supply control means for controlling the hot water supply temperature from the water heater in accordance with the hot water supply mode switched by the switching means, and when the hot water supply mode is the water supply mode, controls the water amount adjusting valve to the bathtub. And a first flow rate limiting control means for reducing the hot water supply flow rate, after the water supply in the water supply mode is completed, the hot water supply mode switching means changes the hot water supply mode from the water supply mode to the hot water filling. Mo When it is switched to de, after starting the hot water supply in該湯tension mode, the water staying in the hot water supply pipe
A second flow rate limiting control means is provided for controlling the water amount control valve to reduce the flow rate of hot water supply to the bath tub during a first predetermined time assumed to be necessary to be discharged to the bath tub. .

When the water supply to the bathtub in the water supply mode is completed, water is accumulated in the hot water supply pipe.
In this state, when the hot water supply mode is switched from the water supply mode to the hot water filling mode and hot water is supplied, the hot water is stored in the hot water supply pipe for a short time before hot water is supplied at a temperature suitable for bathing. The water that was being supplied is supplied to the bathtub.

In such a case, according to the present invention, the second
By the flow rate control means, the flow rate of hot water to the bathtub is reduced during the first predetermined time from the start of hot water supply in the hot water filling mode. Therefore, the water accumulated in the hot water supply pipe is supplied to the bathtub at a large flow rate (flow rate at the time of hot water filling), and the user who is taking a bath in the bathtub may cause discomfort due to the coldness of the supplied water. Can be prevented.

According to a fourth aspect of the present invention, there is provided a water supply pipe connected to a bathtub provided with a water flow control valve, a water heater for supplying hot water to the water supply pipe, and a flow rate of hot water supplied to the bathtub. A flow rate sensor, a hot water supply accumulating means for calculating a cumulative value of the amount of hot water supplied to the bathtub from a value detected by the flow rate sensor, and a hot water supply mode for supplying hot water from the water heater to the bathtub, in order to lower the temperature of hot water in the bathtub. Water supply mode switching means for switching between a water supply mode for supplying water to the water and a hot water filling mode for supplying hot water at a temperature suitable for bathing, and the water heater according to the hot water supply mode switched by the hot water supply mode switching means. Hot water supply control means for controlling the hot water supply temperature from the hot water supply, and first flow rate restriction control means for controlling the water flow control valve to reduce the flow rate of hot water to the bathtub when the hot water supply mode is the water supply mode. Hot water heater in the front After the water supply completion in pointing water mode, by the hot-water supply mode switching means, said hot water supply mode, when from the feed water mode is switched to the water filling mode, after the start hot water in該湯tension mode, the hot water accumulated means
The second flow rate control means for controlling the water flow control valve to reduce the flow rate of hot water to the bathtub until the accumulation of the predetermined hot water supply amount corresponding to the amount of water staying in the hot water supply pipe is calculated. Is provided.

According to the present invention, when the hot water supply mode is switched to the hot water filling mode after the water supply in the water filling mode is completed, the hot water supply accumulating means starts from the hot water supply in the hot water filling mode. Until the accumulation of the predetermined hot water supply amount is calculated, the flow rate of hot water supply to the bathtub is reduced by the second flow rate restriction control means.

Therefore, similarly to the third aspect , the water stored in the hot water supply pipe is supplied to the bathtub at a large flow rate, and the user who is bathing in the bathtub feels discomfort due to the coldness of the supplied water. Can be prevented.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of the water heater of the first embodiment, FIG. 2 is an external view of a remote controller provided in the water heater shown in FIG. 1, and FIGS. 3 and 4 are water heaters shown in FIG. It is a flowchart for demonstrating the hot-water supply operation of FIG.

Referring to FIG. 1, a water heater according to the first embodiment includes a water heater 2 for supplying hot water to a bathtub 1 and a water heater 2.
And a remote controller 4 for the user to give an instruction of a hot water supply operation to the controller 3.

The water heater 2 includes a combustion chamber 5, a burner 6 as heating means provided in the combustion chamber 5, a heat exchanger 8 for heating water in a hot water supply pipe 7 by the burner 6, and a burner 6. An ignition electrode 9 for performing ignition and a flame rod 10 which is a flame sensor for detecting a combustion state of the burner 6 are provided.

A blower fan 11 for supplying combustion air to the burner 6 is provided below the combustion chamber 5, and the burner 6 has a gas supply pipe via an original solenoid valve 12, a hot water supply solenoid valve 13, and a proportional valve 14. Fuel gas is supplied from 15. Also, the first
With the switching solenoid valve 16 and the second switching solenoid valve 17, the range in which the fuel gas of the burner 6 is supplied is changed, and the heat exchanger 8
Is varied.

The hot water supply pipe 7 is connected to the bathtub 1 through a hot water filling electromagnetic valve 18, and the hot water heated by the heat exchanger 8 is supplied to the bathtub 1. The hot water supply pipe 7 has a flow rate sensor 19 for detecting the flow rate of the water supplied to the hot water heater 2, a hot water quantity servo valve 20 for adjusting the flow rate of the hot water supplied from the hot water heater 2, and a hot water heater. And a tapping temperature sensor 21 for detecting the temperature of the hot water supplied from 2.

The remote controller 4 is communicably connected to the controller 3 and transmits and receives a hot water supply control signal to and from the controller 3. Remote controller 4 has hot water supply mode switching means 30 for switching a hot water supply mode from hot water supply device 2 to bathtub 1.

The controller 3 ignites and extinguishes the burner 6, adjusts the combustion amount of the burner 6, and adjusts the flow rate of hot water from the water heater 2 to the bathtub 1 in accordance with a hot water supply control signal from the remote controller 4. The controller 3 includes hot water supply control means 31, flow rate control means 32 (including the first flow rate control means and second flow rate control means of the present invention), hot water supply accumulation means 33, 30.
It has a minute timer 34 and a 20 second timer 35.

Hot water supply control means 31 determines a target hot water supply temperature of water heater 2 according to a hot water supply control signal from remote controller 4,
The original solenoid valve 12, the hot water supply solenoid valve 13, the proportional valve 14, the first switching solenoid valve 16, and the second switching solenoid valve so that the target hot water temperature and the actual hot water temperature detected by the hot water temperature sensor 21 match. 17 and the blower fan 11 are controlled to adjust the amount of heat applied to the heat exchanger 8. Also, the hot water filling solenoid valve 18
By opening and closing, hot water supply to the bathtub 1 and hot water supply stop are performed.

The flow rate control means 32 is provided with
To adjust the flow rate of hot water to bathtub 1. The hot water supply accumulating means 34 is provided with the water heater 2 detected by the flow sensor 19.
Calculate the cumulative value of the amount of water supplied to.

FIG. 2 is an external view of the remote controller 4. When the user operates the operation switch 40, the entire hot water supply apparatus starts operating. The automatic switch 41, the high temperature hot water switch 42 and the hot water switch 43 connect the hot water heater 2 to the bathtub 1
This is a switch for switching the hot water supply mode, and constitutes the hot water supply mode switching means 30.

When the user operates the automatic switch 41, a hot water mode is set, and the remote controller 4
At the temperature set by the hot water temperature switch 44 (hereinafter referred to as hot water temperature), the hot water corresponding to the hot water amount set by the hot water switch 45 (hereinafter hot water amount) is executed.
An instruction is given (hereinafter referred to as a hot water filling operation instruction).

The controller 3 adjusts the amount of heat applied to the heat exchanger 8 by the burner 6 by means of the hot water supply control means 31 when the hot water operation is instructed from the remote controller 4 so that hot water is supplied at the hot water temperature. Then, the hot water filling electromagnetic valve 18 is opened to start hot water supply to the bathtub 1. And after hot water supply starts,
The cumulative value of the hot water supply amount calculated by the hot water supply accumulating means 34 is
When the filling amount is equal to or more than the filling amount, the filling electromagnetic valve 18 is closed to end the filling operation.

When the user operates the high-temperature hot water supply switch 42, the high-temperature hot water supply mode is set, and the remote controller 4 gives the controller 3 a predetermined high temperature (for example, 80.degree. An instruction is issued to execute high-temperature hot water supply during the time set at 46 (hereinafter, referred to as high-temperature hot water supply time) (hereinafter, referred to as a high-temperature hot water supply operation instruction).

When a high-temperature hot water supply operation instruction is given from the remote controller 4, the controller 3
The heating amount of the heat exchanger 8 by the burner 6 is adjusted so that the hot water is supplied at the high hot water temperature.
8 is opened to start hot water supply to the bathtub 1. Then, after the start of hot water supply, when the high-temperature hot water supply time has elapsed, the hot water filling electromagnetic valve 18 is closed to terminate the high-temperature hot water supply operation.

When the user operates the water supply switch 43, a water supply mode is set, and the remote controller 4 gives the controller 3 a water supply for the time set by the water supply timer switch 47 (hereinafter referred to as water supply time). An instruction is given to execute the water operation (hereinafter, referred to as a water supply operation instruction).

When a water supply instruction is given from the remote controller, the controller 3 opens the hot water filling electromagnetic valve 18 in a state where the combustion of the burner 6 is stopped and starts supplying water to the bathtub 1. And, after the start of water supply, when the watering time has elapsed,
The water filling electromagnetic valve 18 is closed to end the water supply operation.

Reference numeral 48 denotes the above-mentioned hot water filling, high-temperature hot water,
A hot water supply temperature switch for setting a hot water supply temperature (hereinafter, referred to as a normal hot water supply temperature) in modes other than the respective hot water supply modes;
Reference numeral 9 denotes a display unit for displaying a set temperature, a set time, an actual hot water temperature, and the like in each hot water supply mode.

Hereinafter, the operation of the controller 3 in each of the above-described hot water filling, hot water supply, and water supply modes will be described in detail with reference to the flowcharts of FIGS.

Referring to FIG. 3, STEP1, STEP3
Reference numeral 0, STEP 33 is a loop for switching the hot water supply mode, and the user operates the automatic switch 41, the high-temperature hot water switch 42, and the cold water switch 43 of the remote controller 4 to fill the hot water, hot water, and hot water. Hot water supply in each hot water supply mode is executed. When the hot water supply operation is not being performed in these hot water supply modes, the target hot water supply temperature by hot water supply control means 31 is the normal hot water supply temperature set by hot water supply temperature switch 48.

In step 1, when the automatic switch 41 is operated and the remote controller 4 issues a high-temperature hot-water supply operation instruction to the controller 3, the hot-water supply control means 31 changes the hot-water supply target temperature from the normal hot-water supply temperature to the high-temperature hot water supply. Hot water temperature (8
0 ° C). Then, in STEP 2, the flow rate limiting control means 32 reduces the flow rate of hot water to the bathtub 1 by the hot water volume servo 20 in order to prevent a user bathing in the bathtub 1 from causing discomfort due to the heat generated by the hot water. The controller 3 opens the hot water filling electromagnetic valve 18 in STEP 3 to start supplying hot water to the bathtub 1 at the high temperature of the hot water (80 ° C.).

After the high-temperature hot water supply operation has started, if the high-temperature hot water supply time has elapsed, the controller 3 closes the hot water filling electromagnetic valve 18 in STEP 4 and terminates hot water supply to the bathtub 1.
Hot water supply control means 31 changes the hot water supply target temperature from the high temperature hot water supply temperature to the normal hot water supply temperature and ends the high temperature hot water supply operation.

When the high-temperature hot water supply operation is completed in STEP 4, the controller 3 sets the 30 minute timer 34 in STEP 5.
Start During the period of 30 minutes, the high-temperature hot water stored in the hot-water supply pipe 7 from the water heater 2 to the bathtub 1 at the end of the high-temperature hot water supply operation is naturally cooled to such an extent that the user does not feel any heat. This is the time that is assumed to be needed for

Here, after the high-temperature hot water supply operation is completed in STEP 4 and before the high-temperature hot water in the hot water supply pipe 7 is naturally cooled, the flow rate restriction control means 32 restricts (decreases) the flow rate of supply to the bathtub 1. Is released and the hot water filling operation is started,
The high-temperature hot water stored in the hot-water supply pipe 7 before the hot water is supplied at the hot water filling temperature is supplied to the bathtub 1 at a large flow rate, and discomfort occurs due to the heat of the hot water supplied to the user during bathing. There is an inconvenience of letting them do it. Then, the flow rate limiting control means 32 determines in STEP 6 that the 30-minute timer has expired in STEP 6 and the hot water in the hot water supply pipe 7 is naturally cooled.
At 0, the restriction (decrease) of the supply flow rate to the bathtub 1 is released.

After the high-temperature filling operation is completed in STEP 4 and before the 30-minute timer expires in STEP 6, if there is an instruction to start the filling operation from the remote controller 4 in STEP 7, the controller 3 performs the operation in STEP 8.
The 0 second timer 35 is started. Note that the time of 20 seconds is a time assumed to be necessary for discharging hot water accumulated in the hot water supply pipe 7 from the water heater 2 to the bathtub 1 after the hot water filling operation is started.

Then, in a state where the flow rate of hot water to the bathtub 1 is restricted (decreased) by the flow rate restriction control means 32,
At 9, the hot water supply control means 31 sets the hot water supply target temperature of the hot water heater 2 to the hot water temperature, opens the hot water electromagnetic valve 18 and starts hot water supply to the bathtub. After starting hot water supply, STE
When the 20-second timer expires in P10, ST
In EP11, the flow rate control means 32 releases the restriction on the flow rate to the bathtub 1 by the hot water quantity servo 20.

As described above, in the first embodiment, when the hot water filling operation is performed before the elapse of 30 minutes after the high-temperature hot water supply operation is completed, the flow rate limiting control means 32 causes the flow rate control means 32 to perform the operation for 20 seconds. By reducing the flow rate of hot water to the hot tub, hot water stored in the hot water supply pipe 7 is prevented from being supplied to the bath tub 1 at a large flow rate.

Then, in STEP 12, hot water supply accumulating means 34
When the accumulated value of the hot water supply amount from the start of the hot water filling operation calculated by the above becomes equal to or more than the above hot water filling amount, the controller 3 closes the hot water filling electromagnetic valve 18 and ends the hot water filling operation.

If the start of the hot water supply operation is instructed from the remote controller 4 in STEP 40 before the 30-minute timer expires in STEP 6, the flow proceeds to STEP 3 to execute the hot water supply operation again. When there is an instruction to start the water supply operation from the remote controller 4 on the remote controller 41 in STEP 41, the process proceeds to STEP 52 to execute the water supply operation.

Next, when there is an instruction to start the filling operation from the remote controller 4 in STEP 30, the process proceeds to STEP 31, and the hot water supply control means 31 sets the target hot water supply temperature of the water heater 2 to the filling temperature, sets the filling water electromagnetic valve. The valve 18 is opened to start hot water supply to the bathtub 1. When the accumulated value of the hot water supply amount from the start of the hot water filling operation calculated by the hot water supply accumulating means 34 in STEP 32 becomes equal to or more than the above hot water filling amount, the controller 3 closes the hot water filling electromagnetic valve 18 and closes the hot water filling valve. End the tension operation.

When the remote controller 4 gives an instruction to start the water supply operation in STEP 33, the flow proceeds to STEP 51 and the flow rate restriction control means 32 discomforts the user who is bathing in the bathtub 1 by the cold caused by the water supply. In order to prevent the occurrence of the hot water, the flow rate of hot water to the bathtub 1 is reduced by the hot water volume servo 20 to limit the flow rate to 5 liters / minute.

Then, in STEP 52, hot water supply control means 31
Is a state in which the operation of the water heater 2 is stopped and the water filling electromagnetic valve 18 is stopped.
And water supply to the bathtub 1 is started.
When the watering time has elapsed in TEP 53, the controller 3 closes the filling electromagnetic valve 18 and ends the watering operation.

When the water supply operation is completed, water is stored in the hot water supply pipe 7 from the water heater 2 to the bathtub 1. Therefore, in this state, the flow rate limiting control means 3
When the hot water supply operation to the bathtub 1 is released by restricting the flow rate of the hot water to the bathtub 1 by 2, the water in the hot water supply pipe 7 is supplied to the bathtub 1 at a large flow rate before the hot water is supplied at the hot water filling temperature, There is an inconvenience that discomfort is caused by coldness of the supplied water to a user who is taking a bath.

Steps 55 to 59 are processes for preventing such inconveniences. When the start of the water filling operation is instructed by the remote controller 4 in the step 54 after the end of the water supply operation, the controller 3 sets the flow rate limiting control. In a state in which the flow rate of hot water to the bathtub 1 is restricted by the means 32, the timer 35 for 20 seconds is started in STEP55.
The time of 20 seconds is a time assumed to be necessary for draining water accumulated in the hot water supply pipe 7 from the water heater 2 to the bathtub 1 after the hot water filling operation is started.

Then, in STEP 56, the hot water supply control means 31
Starts the hot water supply to the bathtub 1 by setting the hot water supply target temperature of the water heater 2 to the hot water temperature and opening the hot water electromagnetic valve 18.
After the start of hot water supply, when the 20-second timer has expired in STEP 57, the restriction on the flow rate of hot water to the bathtub 1 by the flow rate control means 32 is released in STEP 58. As described above, for 20 seconds after the start of the hot water filling operation, by restricting (decreasing) the supply flow rate to the bathtub 1, the water accumulated in the hot water supply pipe 7 is supplied to the bathtub 1 at a large flow rate. Preventing.

Then, in STEP 59, hot water supply accumulating means 34
When the cumulative value of the hot water supply amount from the start of the hot water filling operation calculated by the above becomes equal to or more than the hot water filling amount, the controller 3 closes the hot water filling electromagnetic valve 18 and ends the hot water filling operation.

After completion of the water supply operation, if there is an instruction to start the hot water supply operation from the remote controller 4 in STEP 60, the operation proceeds to STEP 3 to start the hot water supply operation, and the remote controller 4 inserts the hot water supply operation in STEP 61. When there is an instruction to start the water operation, the flow proceeds to STEP 52 to start the water supply operation.

The set values of the timer of 20 seconds and 30 minutes are not limited to these, but may be set according to the length of the hot water supply pipe 7 from the water heater 2 to the bathtub 1 and the diameter of the hot water supply pipe 7. Is done.

Next, a second embodiment of the present invention will be described with reference to the flowcharts of FIGS.

The configuration of the hot water supply apparatus according to the second embodiment is as follows.
Similar to the first embodiment described above, the processing when the start instruction of the filling operation is performed after the end of the hot water supply operation, and the start instruction of the filling operation after the termination of the water supply operation are performed. The only difference is the processing when the error occurs.

Referring to FIG. 5, after the high-temperature hot water supply operation is completed in STEP 4 and before the 30-minute timer 34 times out in STEP 6, when there is an instruction from the remote controller 4 to start the hot water supply operation in STEP 7, Then, in STEP 70, the controller 3 starts the calculation of the cumulative value of the hot water supply amount by the hot water supply accumulating means 33. Then, in STEP 71, the hot water supply control means 31 sets the target hot water supply temperature of the water heater 2 as the hot water filling temperature,
The controller 1 opens the hot water filling electromagnetic valve 18 and starts supplying hot water to the bathtub 1.

After the hot water supply is started, in STEP 72, when the accumulated value of the hot water supply amount from the start of the hot water filling operation by the hot water supply accumulating means 33 becomes a predetermined value or more, the flow rate limiting control means 32
Releases the restriction (decrease) of the flow rate of hot water supplied to the bathtub 1 by the hot water volume servo 20.

Here, the predetermined value is set to a value corresponding to the amount of hot water accumulated in hot water supply pipe 7 from hot water supply device 2 to bathtub 1. Therefore, after the hot water filling operation is started, the hot water supply flow rate to the bathtub 1 is limited (decreased) until the cumulative value by the hot water supply accumulating means 33 becomes equal to or more than the predetermined value. In the same manner as in the embodiment, the hot water accumulated in the hot water supply pipe 7 is supplied to the bathtub 1 at a large flow rate, and a user who is taking a bath in the bathtub 1 causes discomfort due to the heat of the supplied hot water. Can be prevented.

Referring to FIG. 6, after completion of the water supply operation in STEP 53, when there is an instruction to start the hot water filling operation from remote controller 4 in STEP 54, controller 3 uses hot water supply accumulating means 33 in STEP 80. The calculation of the cumulative value of the amount is started. Then, in STEP 81, the hot water supply control means 31 sets the target hot water supply temperature of the water heater 2 to the hot water temperature, and the controller opens the hot water electromagnetic valve 18 to open the bathtub 1
Start hot water supply.

After the hot water supply is started, in STEP 82, when the accumulated value of the hot water supply amount from the start of the hot water filling operation by the hot water supply accumulating means 33 becomes a predetermined value or more, the flow rate limiting control means 32
Releases the restriction (decrease) of the flow rate of hot water supplied to the bathtub 1 by the hot water volume servo 20.

As described above, after the hot water filling operation is started, until the accumulated value by the hot water accumulating means 33 becomes equal to or more than the predetermined value,
By restricting (decreasing) the flow rate of hot water to the bathtub 1, water accumulated in the hot water supply pipe 7 is supplied to the bathtub 1 at a large flow rate and the bathtub 1 is being bathed, as in the first embodiment described above. It is possible to prevent a user from having discomfort due to the coldness of the supplied water.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a hot water supply device of the present invention.

FIG. 2 is an external view of a remote controller provided in the water heater shown in FIG.

FIG. 3 is an operation flowchart of a controller provided in the hot water supply device shown in FIG. 2;

FIG. 4 is an operation flowchart of a controller provided in the hot water supply device shown in FIG. 2;

5 is an operation flowchart of a controller provided in the hot water supply device shown in FIG.

6 is an operation flowchart of a controller provided in the hot water supply device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bathtub, 2 ... Hot water supply, 3 ... Controller, 4 ... Remote control, 5 ... Combustion chamber, 6 ... Burner, 7 ... Hot water supply pipe, 8 ... Heat exchanger, 9 ... Ignition electrode, 10 ... Flame rod, 11 ... Air blow Fan: 12: Original solenoid valve, 13: Hot water supply solenoid valve, 14: Proportional valve, 15: Gas supply pipe, 16: First switching solenoid valve, 17
... Second switching solenoid valve, 18 ... Hot water filling solenoid valve, 19 ... Flow rate sensor, 20 ... Hot water level servo, 21 ... Hot water temperature sensor, 30
... Hot water supply mode switching means, 31 ... Hot water supply control means, 32 ... Flow rate restriction control means, 33 ... Hot water supply accumulation means, 34 ... 30 minute timer, 35 ... 20 second timer, 40 ... Operation switch, 41
... Automatic switch, 42 ... High temperature hot water switch, 43 ... Water hot water switch, 44 ... Hot water temperature switch, 45 ... Hot water quantity switch, 46 ... High temperature hot water hot water switch, 47 ... Water hot water switch, 48 ... Hot water temperature switch, 49 … Display

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP2-143087 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (5)

(57) [Claims] 1. A hot water supply pipe provided with a water amount adjusting valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, and a hot water supply mode for supplying hot water from the hot water supply to the bathtub, the hot water in the bathtub. And a hot water supply mode switching means for switching between a hot water supply mode for supplying hot water to raise the temperature of the hot water and a hot water supply mode for supplying hot water having a temperature suitable for bathing. Hot water supply control means for controlling a hot water supply temperature from the water heater in accordance with the hot water supply mode, and when the hot water supply mode is the hot water supply mode,
A first flow rate control means for controlling the water flow control valve to reduce the flow rate of hot water to the bathtub, wherein after the hot water supply in the high-temperature hot water mode is completed, the hot water supply mode switching means causes the hot water supply mode to be switched by the hot water supply mode switching means. When the mode is switched from the high-temperature hot water filling mode to the hot water filling mode, after the hot water supply is started in the hot water filling mode, the hot water stays in the hot water supply pipe.
A second flow rate limiting control means for controlling the water amount regulating valve to reduce the flow rate of hot water to the bath tub for a first predetermined time assuming that hot water is required to be discharged into the bath tub. A hot water supply device comprising: 2. A hot water supply pipe provided with a water amount adjusting valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, a flow rate sensor for detecting a flow rate of hot water supply to the bathtub, A hot water supply accumulating means for calculating the cumulative value of the amount of hot water supplied to the bathtub from the detected value, and a hot water supply mode for supplying hot water from the water heater to the bathtub are provided by a hot water supply for supplying hot water to raise the temperature of hot water in the bathtub. Hot water supply mode switching means for switching between a hot water mode and a hot water filling mode for supplying hot water at a temperature suitable for bathing, and controlling a hot water supply temperature from the water heater in accordance with the hot water supply mode switched by the hot water supply mode switching means. Hot water supply control means, and when the hot water supply mode is the high temperature hot water supply mode,
A first flow rate control means for controlling the water flow control valve to reduce the flow rate of hot water to the bathtub, wherein after the hot water supply in the high-temperature hot water mode is completed, the hot water supply mode switching means causes the hot water supply mode to be switched by the hot water supply mode switching means. When the mode is switched from the high temperature hot water filling mode to the hot water filling mode, after the hot water supply in the hot water filling mode is started ,
The water flow control valve is controlled to reduce the flow rate of hot water to the bath tub until the accumulation of a predetermined hot water supply amount corresponding to the amount of hot water staying in the hot water supply pipe is calculated. A hot-water supply device provided with a second flow-rate limiting control means for causing the hot-water supply device to perform the control. 3. The method according to claim 2, wherein the second flow rate limiting control means controls the high-temperature hot water supply mode to end the hot water supply mode.
The hot water is naturally cooled to the point where the user does not feel hot.
2. The apparatus is operable only until a second predetermined time , which is assumed to be necessary for operation, elapses.
Or the hot water supply apparatus of 2. 4. A hot water supply pipe provided with a water amount control valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, and a hot water supply mode for supplying hot water from the hot water supply to the bathtub, the hot water in the bathtub. Hot water supply mode switching means for switching between a water supply mode for supplying water to lower the temperature of the water and a hot water filling mode for supplying hot water having a temperature suitable for bathing; and a hot water supply mode switched by the hot water supply mode switching means. A hot water supply control means for controlling a hot water supply temperature from the water heater, and a first flow rate for controlling the water flow control valve to reduce a hot water supply flow rate to the bathtub when the hot water supply mode is the water supply mode. In the hot water supply device provided with restriction control means, after the end of water supply in the water supply mode, when the hot water supply mode is switched from the water supply mode to the hot water filling mode by the hot water supply mode switching means, After starting the hot water supply in the water filling mode, the water staying in the hot water supply pipe bathtubs
Hot water supply, wherein a second flow rate limiting control means for controlling the water flow regulating valve to reduce the flow rate of hot water to the bath tub for a first predetermined time assumed to be required to be discharged to the hot tub is provided. apparatus. 5. A hot water supply pipe provided with a water amount control valve and connected to a bathtub, a water heater for supplying hot water to the hot water pipe, a flow rate sensor for detecting a flow rate of hot water to the bathtub, and a flow rate sensor for the flow rate sensor. Hot water supply accumulating means for calculating a cumulative value of the amount of hot water supplied to the bathtub from the detected value; a hot water supply mode for supplying hot water from the water heater to the bathtub; a water supply mode for supplying water to lower the temperature of hot water in the bathtub; Hot water supply mode switching means for switching to a hot water mode for supplying hot water having a temperature suitable for bathing; hot water supply control for controlling hot water supply temperature from the water heater in accordance with the hot water supply mode switched by the hot water supply mode switching means. A hot water supply apparatus comprising: a first flow rate control unit configured to control the water flow control valve to reduce a flow rate of hot water to the bathtub when the hot water supply mode is the water supply mode; Water supply in To, by the hot-water supply mode switching means, said hot water supply mode, when from the feed water mode is switched to the water filling mode, after the start hot water in該湯tension mode, by the hot water accumulation means, the sheet
Until the accumulation of the predetermined hot water supply amount corresponding to the amount of water staying in the hot water pipe is calculated, a second flow rate limiting control means for controlling the water amount control valve to reduce the hot water supply flow rate to the bathtub is provided. A hot water supply device characterized by the above-mentioned.