JP2003050052A - Control method of hot-water discharging in hot-water supplying system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control method for hot-water discharging in a hot-water supplying system, which is capable of preventing the deterioration in hot-water discharging characteristics in the initial period of high-temperature hot-water discharging while preventing the splash or the like of high-temperature water from a terminal cock. SOLUTION: A temperature sensor is arranged at the upstream end and the downstream end of a hot-water discharging pipeline, connecting a hot-water supplier to the terminal cocks, to measure a time required for the high-temperature water, discharged from the hot-water supplier, to arrive at the terminal side from the upstream terminal of the same by the temperature detection effected by both of the temperature sensors. The value of the capacity of the hot-water discharging pipeline is previously estimated by the value of a measured time and the value of a flow rate. In the initial period of hot-water discharging of the high- temperature water (95 deg.C for example), the hot-water is made to flow at a big flow rate to arrive the same from the hot-water supplier to the terminal cock quickly (NO in S5, S6) and after arriving, the same is made to flow at a small flow rate to prevent the splash of water at the terminal cock (YES in S6, S7). An estimated value of time for reaching the terminal cock when the same is made to flow at a big flow rate in the initial period of hot-water discharging is operated from the value of capacity of the hot-water discharging pipeline (S3). The change from the big flow rate into the small flow rate is effected by the elapse of the value of the estimated time (YES in S6).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply system in which hot water supply pipes connecting between a water heater and a terminal discharge part such as a curran are of various lengths and diameters according to site conditions. The present invention relates to a hot water discharge control method for controlling the initial hot water discharge from a vessel, which is preferably applied as a hot water discharge control method particularly when hot water is discharged to the end discharge part.

[0002]

2. Description of the Related Art Conventionally, as a hot water supply system, a hot water supply device and a terminal curran are connected by a hot water discharge pipe, and hot water from the hot water supply device is supplied to the terminal calan through the hot water discharge pipe to be discharged from the terminal calan. Is generally known. In such a hot water supply system, when the user particularly desires high temperature water (for example, high temperature water of 80 ° C. or higher), the high temperature water discharged from the water heater can be discharged from the terminal currant by setting a desired high temperature setting. It has become. Further, it is also known that a hot water purifier (high temperature hot water, for example, 80 ° C. or higher) is discharged from the terminal currant by interposing a water purifier in the middle of the hot water discharge pipe. In these hot water supply systems, when the user opens the terminal curran, for example, when a flow rate above the minimum operating flow rate is detected, combustion operation in the hot water supply apparatus is started, and predetermined high-temperature water is discharged from the hot water supply apparatus. To be controlled. The combustion operation is stopped when the detected flow rate becomes equal to or lower than the minimum operation flow rate by closing the cullan.

[0003]

By the way, especially when high temperature water is discharged from the terminal curran, if the high temperature water is vigorously discharged from the terminal currant, for example, a water splash (jumping) or the like may occur at a sink or the like. . In particular, when a so-called electronic calan equipped with a water discharge switch (open / close operation switch) is used instead of the type in which the user manually operates the open / close as the terminal curran from which hot water is discharged,
Normally, since the electronic calorin is fully opened by the ON operation of the water discharge switch, the water splash due to the rapid discharge tends to be remarkable.

Therefore, when high-temperature water is discharged from the water heater, in order to suppress or prevent the above water splashing,
It is conceivable to control the flow rate so as to limit the flow rate of tapping water to a relatively small value. However, if such a flow rate control is performed, it takes a long time until the desired high-temperature water is discharged even if the terminal currant is opened, which causes deterioration of the hot water discharge characteristics. In particular, when the hot water supply pipe is long, it takes more time to discharge the high temperature water, and the deterioration of the hot water discharge characteristics becomes remarkable, and the convenience is impaired.

The present invention has been made in view of such circumstances, and an object thereof is to prevent hot water from spattering at the time of hot water discharge, and to discharge hot water at the early stage of hot water discharge. It is an object of the present invention to provide a hot water supply control method for a hot water supply system that can prevent deterioration of characteristics.

[0006]

In order to achieve the above object, a hot water supply control method of a hot water supply system in which hot water from a hot water supply device is discharged from a terminal discharge portion at the end of the hot water supply pipe through a hot water supply pipe to vary the flow rate of the hot water discharge is targeted. The following various solutions were taken. The "hot water supply device" in the present invention may be an instantaneous hot water supply device (including a hot water supply heat retention type) or a hot water storage type hot water supply device.

That is, in the hot water discharge control method according to the first aspect, when hot water having a predetermined temperature or higher is discharged from the water heater, the high temperature water discharged from the start of hot water discharge of the water heater reaches the end discharge portion. Until then, the initial hot water discharge control flow rate was set to be larger than the steady hot water discharge control flow quantity after the high-temperature water reached the end discharge part.

According to the first aspect, when hot water is discharged from the water heater, the initial hot water discharge control flow rate is set to be larger than the steady hot water discharge control flow quantity, so that the steady hot water discharge control flow rate is high water. Even if the flow rate is limited to a small hot water flow rate to prevent splashing, the hot water from the water heater flows at a relatively high flow rate from the start of hot water until it reaches the end discharge part. The water reaches the end discharge part early, and the high temperature water is discharged from the end discharge part early. After the high-temperature water from the water heater reaches the terminal discharge portion, the hot water discharge flow rate is changed to the steady hot water discharge control flow rate, so that water splashes and the like can be suppressed.

In the hot water discharge control method according to the second aspect, when hot water of a predetermined temperature or higher is discharged from the water heater,
While setting the small hot water flow rate value as a steady hot water discharge control flow rate so as to prevent jumping from the end discharge part, from the start of hot water discharge of the water heater until the high temperature water discharged reaches the end discharge part. The initial hot water discharge control flow rate is set to be larger than the steady hot water discharge control flow rate.

According to the second aspect of the present invention, when hot water is discharged from the water heater, the steady hot water discharge control flow rate is set to the small hot water discharge flow rate value for preventing water splash, so that the water splash from the end discharge portion can be ensured. It becomes possible to discharge high-temperature water while being prevented. On the other hand, since the initial hot water discharge control flow rate from the start of hot water discharge in the water heater until the high temperature water reaches the terminal discharge part is set to be larger than the steady hot water discharge control flow rate, the terminal discharge part is opened. The time until the high temperature water is obtained is shortened as compared with the case where the flow rate is uniformly controlled by the steady hot water discharge control flow rate, and the high temperature water can be obtained from the end discharge part early.

In the above-mentioned claim 1 or claim 2, while the high-temperature water discharged from the water heater reaches the end discharge part,
In other words, how to set or acquire the period for controlling the hot water outlet flow rate to the initial hot water discharge control flow rate, in other words, how to set or obtain the timing for changing the hot water discharge flow rate from the initial hot water discharge control flow rate to the steady hot water discharge control flow rate ,
Any one of the following first and second specific methods may be adopted.

That is, as a first method, temperature detecting means for detecting the hot water discharge temperature are arranged at the upstream end side and the terminal end side of the hot water discharge pipe, respectively, and the hot water flow rate to the terminal discharge portion is adjusted. Flow rate adjusting means for adjusting the flow rate is arranged so that hot water is first discharged from the water heater at a constant flow rate to the hot water pipe from the start of hot water discharge, and from this hot water discharge the hot water flows through the hot water pipe to the end discharge part. By obtaining the time value required to reach the above based on the temperature detection by both the temperature detecting means on the upstream end side and the terminal side, the pipe information regarding the capacity of the tap water pipe is acquired in advance, and thereafter, When tapping hot water, the predicted time value from the start of tapping until the hot water reaches the end discharge part is calculated based on the above piping information, and based on the passage of the calculated predicted time value. There so as to change the steady tapping control flow of hot water flow from the initial hot water control flow rate (claim 3).

That is, before normal use of the hot water supply system (during trial operation or first use), pipe information regarding the capacity of the hot water supply pipe is acquired in advance and stored (for example, stored and stored in a non-volatile memory). The hot water outlet control flow rate is changed based on the piping information. More specifically, in order to acquire the pipe information, high temperature water at a predetermined temperature (for example, a specific temperature selected from the range of 80 degrees to 95 degrees) is discharged at a predetermined flow rate, and the upstream end side temperature detection means (water heater). Side temperature detection means) measures the time value elapsed from the time when the predetermined temperature is detected by the end side temperature detection means (temperature detection means on the end discharge side) to the time when the predetermined temperature is detected by a timer or the like. To do. As the piping information, the capacity value itself of the tapping pipe obtained by multiplying the constant flow rate value and the time value, or individual information paired with the constant flow rate value and the time value without multiplication do it. Then, a predicted time value is calculated from the piping information based on the set initial hot water discharge control flow rate, and the initial hot water discharge control flow rate is changed to the steady hot water discharge control flow quantity based on the predicted time value. The terminal side temperature detecting means may detect the temperature at a slightly lower temperature than the predetermined temperature in consideration of heat dissipation of the high temperature water flowing through the hot water outlet pipe.

By adding the specific matters of claim 3, even if the piping conditions such as the length and diameter of the tapping pipe are different at each site, the pipe obtained in advance for the unknown tapping pipe capacity It is possible to surely grasp each site based on the information, and it is possible to appropriately change the initial hot water discharge control flow rate to the steady hot water discharge control flow quantity thereafter. In addition, by storing and storing the piping information in a non-volatile memory (flash memory, EEPROM, etc.), it is possible to reliably store and retain the information even when the water heater is turned off or a power failure occurs. . Note that standard data may be stored in advance in the EEPROM or the like as piping information, and the piping information acquired based on the actual hot water outlet piping may be rewritten after the hot water supply system is installed.

As a second method, a temperature detecting means for detecting the hot water discharge temperature is provided at least at the terminal side of the hot water discharge pipe, and the flow rate of hot water discharged to the terminal discharge part is adjustable. Flow rate adjusting means is provided, and after starting hot water discharge, when the arrival of the high temperature water is detected by the temperature detection by the temperature detecting means, the hot water flow rate is changed from the initial hot water control flow rate to the steady hot water control flow rate. (Claim 4). That is, every time hot water having a temperature equal to or higher than a predetermined temperature is discharged from the water heater, arrival of the high temperature water near the end discharge part is detected in real time by the temperature detection by the temperature detecting means, and then the constant hot water discharge from the initial hot water discharge control flow rate. The control flow rate is changed. According to this claim 4, even if the length of the tapping pipe actually piped is unknown, the high temperature water reaches the end discharge part in real time without obtaining the pipe information in advance as in claim 3. It is possible to accurately change the hot water discharge control flow rate.

The above-mentioned change of the first or second hot water outlet control flow rate may be executed all at once at a predetermined change timing.
You can change it gradually as follows. That is, the change of the hot water discharge flow rate from the initial hot water discharge control flow quantity to the steady hot water discharge control quantity is gradually changed before the high temperature water is reached (claim 5). That is, in the case of claim 3,
The initial hot water discharge control flow rate is gradually reduced from a time point slightly before the predicted time value elapses, and the change to the steady hot water discharge control flow rate is completed when the predicted time value has elapsed. In the case of claim 4, the initial hot water discharge control flow rate is gradually reduced to the steady hot water discharge control amount from the time when the temperature detected by the temperature detecting means is lower than the temperature of the high temperature water by a predetermined amount. To In this case, the "temperature lower by a predetermined amount" may be set in consideration of the rising characteristics of heating in the water heater, or may be determined by performing a test in advance. According to the fifth aspect, it is possible to improve the hot water discharge characteristics and prevent the harmful effects due to water splashing without making the user aware of the change in the flow rate from the end discharge portion.

In the hot water outlet control method for the hot water supply system according to any one of claims 1 to 5, the following specific items may be added. That is, the end discharge part is provided with a mixing function capable of adjusting the discharge temperature by receiving water and mixing with the hot water, and until the high temperature water reaches the end discharge part, a predetermined low temperature is achieved by the mixing function. When the high-temperature water reaches the end discharge part, the water is mixed and discharged so as to reach the temperature, and the notification means notifies that, and then the mixed water is stopped by receiving a confirmation signal based on a user operation. (Claim 6). According to the sixth aspect, the user is informed that the high-temperature water can be discharged from the end discharge portion immediately, and the high-temperature water is discharged after waiting for the user's confirmation operation by some switch operation, for example. While it is possible to start the discharge, it is possible to perform the discharge at a safe low temperature based on the mixing function until the user's confirmation operation.

[0018]

As described above, according to the hot water supply control method of the hot water supply system according to any one of claims 1 to 6, when hot water having a predetermined temperature or higher is started from the hot water supply device, The hot water can reach the terminal discharge part early in the initial stage from when the hot water reaches the terminal discharge part first, and the hot water discharge from the terminal discharge part can be obtained early. Will be able to. In addition, after the high-temperature water from the water heater reaches the end discharge part, the hot water discharge flow rate is changed from the initial hot water discharge control flow rate to the steady hot water discharge control flow rate. Can be suppressed. As a result, when hot water is discharged, it is possible to prevent the splashing of the high temperature water and the like, and at the same time reliably prevent the deterioration of the hot water discharge characteristics at the initial stage of hot water discharge.

In particular, according to the second aspect, when the hot water is discharged from the water heater, the steady discharge control flow rate is set to the small discharge flow rate value for preventing splashing of water, so that the splashing of water from the end discharge portion can be ensured. While hot water can be discharged while preventing the hot water, the time from the start of hot water discharge in the water heater to the time when high temperature water is obtained at the end discharge part is shortened compared to the case of uniform flow rate control with the steady hot water discharge control flow rate. As a result, high temperature water can be obtained from the end discharge part at an early stage.

According to claim 3, claim 1 or claim 2
In the above, even if the piping conditions such as the length and diameter of the tapping pipe differ from site to site, the unknown capacity of the tapping pipe can be surely grasped at each site based on the piping information acquired in advance. It is possible to accurately change the initial hot water discharge control flow rate to the steady hot water discharge control flow rate.

According to claim 4, claim 1 or claim 2
In real time, even if the length of the tap water pipe that is actually piped is unknown, real time is obtained based on the temperature detection by the temperature detecting means arranged at the end side of the tap pipe without obtaining the pipe information in advance as in claim 3. Thus, it is possible to detect the arrival of the high temperature water at the end discharge portion and appropriately change the hot water discharge control flow rate.

According to claim 5, claim 3 or claim 4
By gradually changing the hot water flow rate from the initial hot water flow control flow rate to the steady hot water flow control amount before reaching the high temperature water, it is possible to improve the hot water flow characteristics without letting the user notice the flow rate change from the end discharge part. It is possible to prevent the harmful effects of water splashing together.

Further, according to the sixth aspect, the user is informed that the high temperature water can be discharged from the end discharge portion immediately, and the high temperature water is waited for, for example, after a confirmation operation by the user by some switch operation. On the other hand, the discharge can be started, while the discharge can be performed at a safe low temperature based on the mixing function with water in the terminal discharge portion until the confirmation operation by the user. As a result, it is possible to further improve the convenience in hot water discharge by the hot water supply system.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows a hot water supply system to which the first embodiment of the present invention is applied. In this hot water supply system, the hot water outlet path from the water heater 2 has two systems of a low temperature region and a high temperature region, and for example, a general hot water supply curran 3 (only one is shown in the figure) installed at one or more places such as a washroom. On the other hand, while low-temperature water (for example, 32 to 60 ° C.) is discharged, high-temperature water (for example, 80 ° C. or higher) is discharged to the electronic calan 4 as a terminal discharge unit installed in a kitchen or the like. . Further, in the first embodiment, a water purifier 5 is inserted in the middle of the electronic currant 4 so that high temperature water (high temperature purified water) after purification is discharged.

The water heater 2 comprises a combustion can body 10 and a heat exchanger 12 which is heated by the combustion heat of the combustion burner 11 in the combustion can body 10. In the heat exchanger 12, a water inlet pipe 13 is passed through. For example, tap water to be introduced is heated to a predetermined high temperature range and is discharged to the discharge pipe 14. This tap pipe 14 is provided with a branch portion 15 for the low temperature tap pipe 1.
6 and high-temperature hot water outlet pipe 17 are branched into a low-temperature hot water outlet pipe 1
The low temperature connecting pipe 31 extended to the general hot water supply calor 3 is connected to the downstream connecting end of 6, and the high temperature connecting pipe 41 extended to the electronic calan 4 is connected to the downstream connecting end of the high temperature hot water discharge pipe 17. Has been done. The hot water outlet pipe 14, the high temperature hot water outlet pipe 17, and the high temperature connecting pipe 41 constitute the hot water outlet pipe of the present invention. The high temperature connecting pipe 41 serves as a tap water pipe that is piped depending on the site.

A first bypass pipe 18 that bypasses the combustion can body 10 is bridged between the water inlet pipe 13 and the hot water outlet pipe 14, and the first bypass pipe 18 is further provided with a three-way intermediate part. The second bypass pipe 2 that bypasses the branch portion 15 from the switching valve 19 and extends downstream of the low-temperature hot water pipe 16.
0 is connected.

An inlet temperature sensor 21 for detecting the inlet temperature is provided in the inlet pipe 13, and is heated by the heat exchanger 12 to a position closer to the heat exchanger 12 than the branch position of the first bypass pipe 18. An incoming water flow rate sensor 22 for detecting the incoming water flow rate is installed. A flow rate adjusting valve 23 as a flow rate adjusting means is provided in the hot water outlet pipe 14 between the merging position of the first bypass pipe 18 and the branch portion 15, and the heat exchanger 12 is provided.
An upstream end side temperature detecting sensor 24 as a temperature detecting means arranged on the upstream end side of the hot water discharge pipe for detecting the temperature of hot water discharged from the hot water supply pipe is interposed. The low-temperature hot water discharge pipe 16 has a check valve 25 for preventing a backflow from the second bypass pipe 20.
The hot water outlet pipe 17 is provided with a water heater side solenoid valve 26 for switching the inside and the outside of the pipe, and a check valve 27 for preventing a backflow from the electronic calorin 4 side into the water heater 2. There is. Further, the water flow switch 2 is attached to the second bypass pipe 20.
8 is interposed. The water heater side solenoid valve 26 is preferably an electric shutter valve from the viewpoint of preventing clogging.

The electronic calorin 4 is provided with a calan side electromagnetic valve 42 for discharging or stopping the discharge by switching the opening and closing, and a hot water outlet pipe end side for detecting the hot and cold water temperature in the hot water tapping connection pipe 41 at the electronic calan 4 side position. The terminal side temperature detecting sensor 43 as a temperature detecting means, a water discharge switch 44 as an opening / closing operation switch, and a speaker 45 as an audio notification means are provided. The electronic currant 4 is connected to a controller 6 (described later) installed in the water heater 2 wirelessly or by wire, and the speaker 45 outputs a predetermined voice guidance by a voice circuit built in the controller 6. There is. Instead of the speaker 45, the display unit 63a or the speaker 63b of the remote controller 60 described later may be used as the notification unit 63.

Further, the water purifier 5 is interposed at the position of the hot water outlet connection pipe 41 on the electronic calan 4 side, and the high temperature water supplied by the hot water outlet connection pipe 41 is passed through an internal water filter material. The high-temperature purified hot water after purification is supplied to the electronic currant 4.

The hot water supply system described above is designed to be operated and controlled by the controller 6 incorporated in the hot water supply device 2. A remote controller 60 installed in the vicinity of the electronic calorin 4 is connected to the controller 6 wirelessly or by wire, and the combustion burner 11 of the water heater 2 of the water heater 2 is based on various information set and input by the user to the remote controller 60. Various controls such as combustion control, high-temperature hot water discharge control for the electronic calorin 4, and general hot water discharge control for the general hot water supply calorin 3 are performed as operation controls. In the remote controller 60, in addition to the operation switch and the switch for inputting and setting the hot water temperature desired to be discharged from the general hot water supply scallop 3, when the high temperature hot water is discharged from the electronic scallop 4, the water heater 2 is heated to a high temperature. High temperature setting switch 6 that is turned on for hot water
1 or the operation of the high temperature setting switch 61, the display unit 6
A selection switch 62 for obtaining the piping information of the hot water piping and setting commands such as the set temperature of the high temperature hot water from the menu displayed on 3a is provided.

As shown in FIG. 2, the controller 6 includes a combustion control section 65 for executing the combustion control,
A general tap control section 66 for performing the above general tap control,
A high temperature hot water discharge control unit 67 for performing the high temperature hot water discharge control;
A piping information acquisition unit 68 having an EEPROM 68a as a piping information storage unit is provided.

The combustion control section 65 is provided with the incoming water flow rate sensor 2
The basic control content is to start the combustion operation of the combustion burner 11 when 2 detects an incoming water flow rate exceeding a predetermined minimum operating flow rate, and to stop the combustion operation when the incoming water flow rate becomes less than the minimum operating flow rate. is there. In the combustion operation, the high temperature setting switch 61 is turned off.
The combustion amount is determined according to the general hot water discharge control unit 67 in the FF state, and according to the high temperature hot water discharge control unit 66 when the high temperature setting switch 61 is turned on.

When the general hot water supply calor 3 is opened while the high temperature setting switch 61 is in the OFF state, the general hot water discharge control unit 66 heats the combustion burner 11 to discharge the predetermined high temperature water from the heat exchanger 12. For three-way switching valve 19
Water is supplied through the first bypass pipe 18 to mix the water, and thereby the temperature of the remote control 60 is adjusted to the target hot water temperature set by the user. On the other hand, when the general hot water supply system 3 is opened while the high temperature setting switch 61 is turned on, the first bypass pipe 18 and the second bypass pipe 20 are switched by switching the three-way switching valve 19.
Water is supplied to the low-temperature hot-water outlet pipe 16 through the low-temperature hot-water outlet pipe 16 and mixed with the high-temperature water discharged from the heat exchanger 12 in the low-temperature hot-water outlet pipe 16, whereby the temperature is adjusted to reach the target hot-water outlet temperature. In any case, the predetermined low-temperature water after temperature control is discharged from the general hot-water supply currant 3 through the low-temperature hot water supply pipe 16 and the low-temperature connection pipe 31.

When the high-temperature setting switch 61 is turned on, the high-temperature hot water discharge control unit 67 shuts off the hot water discharge pipe 14 side of the three-way switching valve 19, and then the water discharge switch 44.
When is turned on, the water heater side solenoid valve 26 and the calan side solenoid valve 42 are respectively opened to cause the hot water heated by the combustion burner 11 to be discharged to the hot water discharge pipe 14, and the hot water discharged is heated to the high temperature hot water discharge pipe 17 and the high temperature water discharge pipe 17. It flows through the connecting pipe 41 to the high temperature currant 4. At this time, the initial hot water discharge control flow rate (for example, 5 L / min-10 L /
Minute), and then a small steady flow control flow rate (for example, 3 L / min) for preventing water splashing is set, and the change timing from this initial hot flow control flow rate to the steady hot flow control flow rate is set to the pipe information acquisition unit 68. It is designed to be set on the basis of piping information described later.

The piping information acquisition section 68 is output by a switch operation using the remote controller 60 or a switch operation such as a dip switch provided in the water heater 2 at the time of a test operation after the installation of the hot water supply system or the first use. The process is started in response to the execution command, and the predetermined pipe information acquisition process is performed to acquire the pipe information about the capacity of the hot water discharge pipe including the hot water discharge pipe 14, the high temperature hot water discharge pipe 17, and the high temperature connection pipe 41, and the acquired pipe. The information is updated and stored in the EEPROM 68a. That is, the EEPR
Standard piping information is preset and written in the OM 68a at the time of factory shipment.

The above-mentioned pipe information acquisition processing is performed as follows. First, the water heater side electromagnetic valve 26 and the calan side electromagnetic valve 42 are forcibly opened to discharge the water from the water inlet pipe 13 from the electronic calorin 4 through the hot water outlet pipe, while the combustion operation of the combustion burner 11 is started. On this occasion,
The flow rate adjusting valve 23 sets the flow rate of the discharged hot water to, for example, 3 L / min. Next, from the time when the upstream end side temperature detection sensor 24 detects a predetermined high temperature (for example, a specific temperature selected from the range of 70 ° C. to 95 ° C .; hereinafter, described as “90 ° C.”), the controller 6 The internal temperature detection sensor 43 starts counting by the built-in timer of "90-
When α '° C is detected, the built-in timer is stopped.
It should be noted that the above "α" may be set in consideration of the amount of heat radiated while passing through the standard length outlet pipe. Then, the actual hot water discharge pipe capacity value V is calculated by multiplying the hot water discharge flow rate value and the measurement time value measured by the built-in timer, and this capacity value V is stored in the EEPROM 68a as the pipe information.

The high temperature hot water discharge control by the high temperature hot water discharge control unit 67 will be described below with reference to FIG.

First, it is confirmed whether or not there is a high temperature hot water discharge request by checking whether or not the high temperature setting switch 61 is turned on (step S1), and when it is turned on, the target temperature input to the remote controller 60 (for example, 95 ° C.) is set. ) Is output to the combustion control unit 65 (step S1).
Then, YES, step S2). Next, based on the above piping information, the predicted time value t (t = V / Qi) at which the high-temperature water from the water heater 2 at the initial hot water discharge control flow rate Qi reaches the electronic calorin 4
Is calculated (step S3). Then, it is determined whether or not the hot water discharge conditions (the output of the ON operation signal of the water discharge switch 44 and the detection of the minimum working flow rate by the water flow rate sensor 22) are satisfied. 23 to start tapping, that is, combustion burner 11
Is started at the above-mentioned high-temperature hot water discharge amount (step S
YES in step 4 and step S5).

As a result, the hot water temperature rises, and the hot water discharge is continued at the above Qi until the estimated time value has elapsed after the upstream end side temperature detecting means 24 detected the above "95 ° C." (NO in step S6). ), When the predicted time value t has elapsed, the output to the flow rate adjusting valve 23 is changed to the steady hot water outlet control flow rate Qu (YES in step S6, step S6).
7). The hot water discharge at Qu is continued as long as the above-mentioned hot water discharge conditions are satisfied, and if the OFF operation signal of the water discharge switch 44 is output and the hot water discharge conditions are not satisfied, the combustion of the combustion burner 11 is stopped and the solenoid valves 26, 42 are turned off. To close. It should be noted that, just before the above-described estimated time value t has passed, a voice guidance such as "high-temperature water comes out" may be given from the speaker 45 to call the user's attention.

With the above high-temperature hot water discharge control, the time from when the user turns on (open) the water discharge switch 44 of the electronic currant 4 until the high temperature water actually reaches from the electronic currant 4 is uniform from the initial hot water discharge. In comparison with the case where hot water is discharged at the steady hot water discharge control flow Qu, the high temperature water can be obtained early by the operation of obtaining the high temperature water (ON operation of the water discharge switch 44). After the high-temperature water reaches the electronic calorie 4, the steady hot water discharge control flow rate Qu is throttled, so that the momentum of the high-temperature water actually discharged from the electronic calorin 4 is reduced and the high-temperature water in the sink or the like is reduced. It becomes possible to prevent water splashing.

<Second Embodiment> FIG. 4 shows a hot water supply system to which a second embodiment of the present invention is applied. In this hot water supply system, the controller 6 installed in the water heater 2 and the Karan controller 6a installed in the electronic callan 4 are connected to each other by wireless or wired communication so that they can communicate with each other.
The electronic currant 4 has a mixing function for mixing the water entering from the water inlet pipe 40 with the hot water supplied from the high temperature connecting pipe 41 to adjust the temperature. Since the configuration excluding these points is the same as that of the hot water supply system of the first embodiment, the same components are designated by the same reference numerals as those of the first embodiment, and detailed description thereof will be omitted. Also, the part different from the first embodiment will be mainly described.

The temperature control by the above-mentioned mixing function is based on a command from the controller 6 and the controller 6 on the Karan side.
In addition, the ON operation signal of the water discharge switch 44 and the temperature detection signal from the temperature detection sensor 43 are output to the controller 6 via the Karan controller 6a.

High temperature hot water discharge control unit 67 in the second embodiment
The high-temperature hot water discharge control (see FIG. 2) is performed with respect to the hot water supplied to the electronic currant 4 at the initial hot water discharge control flow rate Qi until the predicted time value elapses in step S5 and step S6 (see FIG. 3). Water is mixed by the mixing function to adjust the temperature to a predetermined low temperature (for example, 40 ° C.), and hot water after the temperature adjustment is discharged from the electronic currant 4. Then, the predicted time value t
Immediately before the passage of, for example, the speaker 45 gives a voice guidance (informing) that "high temperature hot water at 95 ° C is possible. If you really want to hot water, press the confirmation switch." The temperature control is continued until the user turns on the confirmation switch 46. That is, even if the predicted time value has elapsed in step S6 of FIG. 3, the output of the ON operation signal of the confirmation switch 46 is awaited without proceeding to step S7, and the output of the ON operation signal is received and the steady state operation of step S7 is performed. Change to the hot water outlet control flow rate Qu, and the temperature control is stopped in accordance with this change. As a result, high-temperature water of 95 ° C. is discharged from the electronic calorin 4 at a flow rate that prevents water splashing.

As described above, according to the second embodiment, when the high-temperature water reaches the electronic currant 4, the user is informed of whether or not the high-temperature water can be really discharged, and the user's confirmation operation is performed. While the high-temperature water is actually discharged from the electronic calorin 4 after waiting, the safe low-temperature discharge is maintained by the temperature control control on the electronic calan 4 side until the user's confirmation operation.

<Other Embodiments> The present invention is not limited to the above-described embodiments, and includes various other embodiments. That is, the first or second
In the embodiment, the initial hot water discharge control amount Qi is changed to the steady hot water discharge control flow rate Qu at once, but the present invention is not limited to this, and the above change may be made gradually. For example, in the first embodiment, Qi starts immediately before the predicted time value t elapses.
May be gradually decreased, and in the second embodiment, Qi may be gradually decreased from the output of the user's confirmation operation signal.

Further, in each of the above-mentioned embodiments, the piping information is acquired in advance, the predicted time value is calculated based on this piping information,
Although the hot water outlet flow rate is changed based on the predicted time value or the like, the present invention is not limited to this, and the above-described pre-acquisition of piping information may be omitted. In this case, for example, when hot water of 95 ° C. is discharged from the water heater 2, when the terminal side temperature detection sensor 43 detects the temperature corresponding to the above “95 ° C.”, the above-mentioned hot water flow rate is changed. You can do it.

Further, in each of the above-mentioned embodiments, the flow rate adjusting valve 23 as the flow rate adjusting means is arranged on the water heater 2 side, but the present invention is not limited to this, and the flow rate adjusting means is the electronic calorie 4.
You may make it arrange | position at the (terminal discharge part) side.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a hot water supply system to which a first embodiment of the present invention is applied.

FIG. 2 is a block diagram showing contents of a controller.

FIG. 3 is a flowchart showing high temperature hot water discharge control.

FIG. 4 is a schematic diagram of a hot water supply system to which the second embodiment is applied.

[Explanation of symbols]

2 Hot water supply device 4 Electronic curr (end discharge part) 6 Controller 6a Currant side controller 14 Hot water pipe (hot water pipe) 17 High temperature hot water pipe (hot water pipe) 41 High temperature connection pipe (hot water pipe) 22 Water flow rate sensor 23 Flow rate control valve (flow rate) Adjusting means) 24 Upstream end side temperature detecting sensor (upstream end side temperature detecting means) 43 End side temperature detecting sensor (end side temperature detecting means) 45 Speaker (informing means) 63 Informing means 67 High temperature hot water control section 68 Piping information acquisition section

Claims (6)

[Claims] 1. A hot water supply control method for a hot water supply system, wherein hot water from a hot water supply device is discharged from an end discharge part at the end of the hot water supply pipe through a hot water supply pipe with a variable flow rate of hot water. When performing, the initial hot water discharge control flow rate from the start of hot water discharge of the water heater until the high temperature water discharged reaches the terminal discharge portion is a constant hot water discharge control after the high temperature water reaches the terminal discharge portion. A hot water supply control method for a hot water supply system, which is characterized by setting the flow rate higher than the flow rate. 2. A hot water supply control method for a hot water supply system, wherein hot water from a hot water supply device is discharged from an end discharge portion at the end of the hot water supply pipe through a hot water discharge pipe, and hot water having a predetermined temperature or higher is discharged from the hot water supply device. When doing so, a small hot water flow rate value is set as a steady hot water discharge control flow rate so as to prevent jumping from the terminal discharge part, while the high temperature water discharged from the start of hot water supply of the water heater reaches the terminal discharge part. A method for controlling hot water supply in a hot water supply system, wherein the initial hot water discharge control flow rate during the period is set to be larger than the steady hot water discharge control flow rate. 3. The hot water supply control method for a hot water supply system according to claim 1 or 2, wherein temperature detecting means for detecting a hot water temperature are provided at the upstream end side and the terminal end side of the hot water supply pipe, respectively. At the same time, the flow rate adjusting means for adjusting the flow rate of hot water to the end discharge part is changeable, and the hot water is discharged from the hot water supply device at a constant flow rate from the hot water supply device to the hot water discharge pipe. Regarding the capacity of the tapping pipe, the time value required from the start to the end discharge part through the tapping pipe is obtained based on the temperature detection by the temperature detecting means on both the upstream end side and the end side. After obtaining the piping information in advance, when hot water is discharged, the predicted time value from the start of hot water to the arrival of the hot water at the end discharge part is calculated based on the above piping information. A hot water supply control method for a hot water supply system, wherein the hot water flow rate is changed from the initial hot water flow control flow rate to a steady hot water flow control flow rate based on the elapse of the calculated predicted time value. 4. A hot water supply control method for a hot water supply system according to claim 1 or 2, wherein temperature detecting means for detecting a hot water temperature is disposed at least at the end side of the hot water supply pipe. Flow rate adjusting means is arranged to adjust the flow rate of hot water to the end discharge part so that the hot water flow rate is detected when the arrival of the high temperature water is detected by the temperature detection by the temperature detecting means. A hot water supply system control method for changing the initial hot water discharge control flow rate to a steady hot water discharge control flow rate. 5. The hot water supply control method for a hot water supply system according to claim 3 or 4, wherein the change of the hot water flow rate from the initial hot water flow control flow rate to the steady hot water flow control amount is gradually performed before reaching the high temperature water. To change,
Hot water supply system control method. 6. The hot water supply method for hot water supply system according to any one of claims 1 to 5, wherein the terminal discharge part receives the water and mixes the hot water with the hot water to adjust the discharge temperature. It has a function to mix and discharge the high temperature water to a predetermined low temperature by the mixing function until the high temperature water reaches the terminal discharge part, and when the high temperature water reaches the terminal discharge part, the notification means The hot water supply control method for the hot water supply system, wherein the mixed water is stopped after receiving a confirmation signal based on a user operation.