JP2020063882A - Hot water supply system - Google Patents

Abstract

To provide a hot water supply system capable of effectively shortening, to the extent possible, a period when cooled hot water is supplied to a hot water tap immediately after starting hot water supply to the hot water tap and thereby enhancing comfort of a user.SOLUTION: A hot water supply system comprises: a hot water tap 15 connected to a heat source machine 1 through a first hot water supply passage 12 and 13a; a machine 20 connected to an intermediary section 14 of the first hot water supply passage 12 and 13a through a second hot water supply passage 13b; a tap opening prediction determining section 7b which determines whether or not the hot water tap 15 is in a state where opening thereof is predicted; and a control section 25 which performs open valve control of a feed water valve 22 of the machine 20 so as to supply water to the machine 20 for a predetermined period when the tap opening prediction determining section 7b determines that the hot water tap is in a state where the opening thereof is predicted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water supply system.

  In a hot water supply system that is configured to supply hot water heated by a heat source device to a hot water tap in a kitchen, etc., the hot water that remains in the hot water supply path from the heat source device to the hot water tap will cool to the hot water tap. When hot water supply (hot water supply by opening the hot water tap) is started, the cold hot water for water remaining in the hot water supply passage is supplied to the hot water tap in the initial period immediately after the start of the hot water supply, which causes user discomfort. Easy to influence.

  Therefore, for example, in Patent Document 1, hot water supply to the dishwasher and drainage operation in the dishwasher are periodically performed, so that in the hot water supply path from the heat source unit to the hot water tap, the heat source unit is connected to the dishwasher. It has been proposed to periodically raise the temperature of hot water for hot water supply in a hot water supply passage shared with the hot water supply passage.

JP-A-10-197065

  However, in the system disclosed in Patent Document 1, when the timing of starting hot water supply to the hot water tap is immediately before the start of regular hot water supply to the dishwasher, when hot water supply to the hot water tap is started. The temperature of the hot water for hot water supply in the water supply path from the heat source device to the hot water tap is lowered by heat radiation. For this reason, a situation where the comfort of the user cannot be sufficiently ensured is likely to occur. In addition, when the hot water supply to the hot water tap is infrequent (opening frequency of the hot water tap), the hot water supply to the dishwasher and the drainage operation in the dishwasher may occur without hot water being supplied to the hot water tap. It may take place over time. As a result, energy loss or increase in water resource loss is likely to occur.

  The present invention has been made in view of such a background, and it is possible to effectively realize as short as possible a period during which cold hot water for hot water supply is supplied to the hot water tap immediately after the start of hot water supply to the hot water tap, and, by extension, It is an object of the present invention to provide a hot water supply system that can improve user comfort. Furthermore, it aims at providing the hot water supply system which can suppress energy loss and loss of water resources as much as possible.

In order to achieve the above object, the hot water supply system of the present invention includes a heat source device that heats the hot water supply water and discharges the hot water when the hot water supply water flows in,
A hot-water tap connected to the heat-source device through a first hot-water supply path so that hot-water for hot-water supply from the heat-source device can be supplied;
A water supply valve that is connected to the middle of the first hot water supply passage through a second hot water supply passage so that hot water for hot water discharged from the heat source device can be supplied from the middle of the first hot water supply passage, and the second hot water supply passage can be opened and closed. A hot water supply system including a device including:
An uncapping prediction determining unit that determines whether or not the hot water tap is predicted to be unsealed,
And a control unit for controlling the opening of the water supply valve so that the water supply to the device is performed for a predetermined period when the judgment result of the plug opening prediction judgment unit becomes affirmative. (First invention).

  In the present invention, the situation in which the opening of the hot water tap is predicted is, more specifically, the situation before the opening of the hot water tap, and soon the opening of the hot water tap (therefore, the hot water tap) It means the situation where it is predicted that water supply will be started.

  According to the present invention, when the judgment result of the plug opening prediction judgment unit becomes affirmative, that is, in a situation where opening of the hot water tap is predicted, the water supply valve of the device is controlled to open, Water is supplied to the device for a predetermined period. Then, the hot-water supply water flowing into the heat-source equipment together with this water-supply is heated by the heat-source equipment, and the heated hot-water supply water is from the heat-source equipment, a portion on the upstream side of the intermediate portion of the first hot-water supply path, It is supplied to the device via the second hot water supply passage.

  Therefore, before the actual opening of the hot water supply tap, it is possible to replace the hot water supply water in the upstream portion of the first hot water supply passage with the hot water supply water heated by the heat source device. As a result, after the hot water tap is actually opened, the heated hot water for hot water supply is quickly supplied to the hot water tap.

  Therefore, according to the first aspect of the present invention, it is possible to effectively realize as short a period as possible in which the hot water for cooling hot water is supplied to the hot water tap immediately after the hot water is started to be supplied to the hot water tap, and thus to improve the comfort of the user. Can be increased. In addition, since water is supplied to the equipment in a situation where opening of the hot water tap is predicted, it is possible to prevent water from being repeatedly supplied to the equipment while the hot water tap is not opened. it can. As a result, energy loss and water resource loss can be suppressed as much as possible.

  In the first aspect of the invention, the device includes a drainage device capable of performing a drainage operation for draining the supplied hot water supply water, and the control unit is in parallel with or at the same time as the opening control of the water supply valve. A mode may be adopted in which after the valve control is completed, the drainage device is further configured to have a function of controlling the drainage device so as to perform the drainage operation of the drainage device (second invention).

  According to this, it becomes possible to prevent the hot water supply water supplied to the device from being left as it is stored in the device.

  In the first invention or the second invention, the device includes a first temperature sensor capable of detecting a temperature of hot water for hot water supplied from the second hot water supply passage, and water is supplied to the device during the predetermined period. A mode may be adopted in which, after the start, it is a period until the temperature detected value by the first temperature sensor rises to a temperature equal to or higher than a first predetermined value (third invention).

  According to this, it is possible to reliably realize that the hot water supply water in the upstream portion of the first hot water supply passage is replaced with the hot water supply water heated by the heat source device during the execution period of the water supply to the device. It becomes possible to prevent the execution period from becoming longer than necessary.

  In the first to third inventions, the heat source device includes a second temperature sensor capable of detecting a temperature of hot water for hot water discharged to the first hot water supply passage or a temperature of hot water for hot water flowing into the heat source device. When the determination result of the opening prediction determination unit is affirmative, the control unit determines the temperature detection value of the second temperature sensor in a state in which water is not flowing through the first hot water supply passage. Is preferably configured to execute the valve opening control of the water supply valve on condition that the temperature is equal to or lower than the second predetermined value (fourth invention).

  According to this, when the determination result of the uncapping prediction determination unit is affirmative, the temperature detection value of the second temperature sensor in the state where water is not flowing through the first hot water supply passage is the second predetermined value. When it is higher than the value, that is, when it can be estimated that the hot water for hot water supply in the first hot water supply passage is not so cold, the water supply to the device is not executed.

  On the other hand, when the temperature detection value of the second temperature sensor is equal to or lower than the second predetermined value, that is, when it can be estimated that the hot water for hot water supply in the first hot water supply passage is cold, water supply to the device is executed. To be done.

  Therefore, in order to minimize the period during which cold water for hot water supply is supplied to the hot water tap immediately after starting hot water supply to the hot water tap, the water is supplied to the equipment in a highly necessary situation, and the need is low. In some situations, it is possible to avoid watering the equipment as much as possible. As a result, energy loss and water resource loss can be suppressed even more effectively.

  In the said 1st-4th invention, the said heat-source equipment can perform the hot-water beam operation which hot-water-beams to a bathtub, and the said opening prediction judgment part, when the hot-water beam operation of the said heat source machine is performed. In addition, a mode in which the determination result is configured to be positive can be adopted (fifth invention).

  Here, when the hot water beam operation is performed, usually, soon after that, opening of the hot water tap is often started for a shower bath or the like in the bathroom. Therefore, according to the fifth aspect, it is possible to appropriately predict the opening of the hot water supply tap. Further, in particular, when the hot-water tap of the bathroom is opened to perform a shower bath in the bathroom, it is possible to prevent the temperature of the hot-water supply water flowing out from the hot-water tap from increasing or decreasing. .

The figure which shows the whole structure of the hot water supply system of embodiment of this invention. The flowchart which shows operation | movement of the hot water supply system of embodiment.

  An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. With reference to FIG. 1, the hot water supply system according to the present embodiment includes a heat source device 1 that heats hot water for hot water supply and discharges hot water, and a plurality of hot water taps 15 and a dishwasher 20 that are targets for hot water supply from the heat source device 1. Including.

  To the heat source device 1, a water supply passage 11 for supplying hot water for hot water supply to the heat source device 1 from a water supply source (not shown) and a hot water supply passage 12 for discharging heated hot water for hot water supply from the heat source device 1 are connected. Further, the heat source device 1 is equipped with a burner 2 as a combustion type heating unit and a heat exchanger 3 which is heated by combustion heat generated during a combustion operation of the burner 2. The heat exchanger 3 is connected to the hot water supply passage 11 and the hot water supply passage 12 so that the hot water supply water supplied from the water supply passage 11 flows to the hot water supply passage 12 via the heat exchanger 3. The burner 2 may be either a burner that burns a fuel gas (gas fuel) or a burner that burns a liquid fuel such as kerosene.

  In addition, in the present embodiment, the heat source device 1 is a heat source device that can perform a hot water supply operation for supplying hot water to the hot water tap 15 and the like, as well as a bath operation such as a hot water beam of the bath BT of the bathroom. It is connected to the bathtub BT through a bath water passage 4 which is branched from the hot water supply passage 12 inside. An opening / closing valve 4a composed of an electromagnetic valve or the like is interposed in the bath water passage 4, and by controlling the opening / closing valve 4a to open, the hot water supply passage 12 is passed through the bath water passage 4 through the bath water passage 4. It is possible to supply water for hot water supply to the bath BT.

  Supplementally, the heat source device 1 may include a bypass passage for flowing a part of the hot water supply water supplied from the water supply passage 11 to the hot water supply passage 12 by bypassing the heat exchanger 3. Further, the heat source device 1 may include a heating unit that converts electric energy into heat energy to generate heat in place of the burner 2 or in addition to the burner 2. Further, the heat source device 1 is for a bath in which hot water in the bath BT is circulated through a heat exchanger (a heat exchanger different from the heat exchanger 3) heated by a heating unit different from the burner 2. A circulation channel may be included.

  The heat source device 1 further includes various sensors including a temperature sensor 5 assembled in the hot water supply passage 12 so as to detect the temperature of hot water for hot water supply from the heat source device 1 to the hot water supply passage 12, A control device 6 having a function of performing operation control related to hot water supply operation and bath operation is installed. The temperature sensor 5 corresponds to the second temperature sensor in the present invention.

  The control device 6 is composed of, for example, an electronic circuit unit including a microcomputer, a memory, an interface circuit, a communication device, etc., the detection signals of the respective sensors including the temperature sensor 5 are input, and the heat source device 1 is operated. It is possible to perform wired or wireless communication with the remote controller 7.

  Then, the control device 6 controls the operation of the hot water supply operation and the bath operation of the heat source device 1 (the combustion operation of the burner 2) by the function realized by the installed hardware configuration and / or the program (software configuration). (Including control). For example, when the control device 6 detects the passage of water from the water supply passage 11 to the hot water supply passage 12 by a detection signal of a sensor such as a flow rate sensor (not shown), the control device 6 starts the combustion operation of the burner 2 so that the hot water supply passage 11 starts. The hot water supply operation of heating the water flow to 12 (hot water supply water flowing into the heat source device 1 from the water supply path 11) by the heat exchanger 3 is started. In addition, for example, during the hot water operation, the control device 6 causes the burner 2 to perform the combustion operation while the open / close valve 4a of the bath water passage 4 is controlled to open, so that the hot water for heating the bath BT is heated. To supply.

  The remote controller 7 is arranged in an appropriate place such as a kitchen, and is used to turn on / off the hot water supply operation of the heat source device 1, execute command operation of a bath operation such as hot water operation, and the temperature of hot water for hot water supply from the heat source device 1 to the hot water supply passage 12. An operation unit 7a for performing a setting operation of a target value (hereinafter referred to as a target hot water supply temperature) and the like, and a control unit 7b having a function of performing communication processing with the control device 6 of the heat source device 1 and the like.

  The operation unit 7a includes operation switches, a touch panel, a voice input unit, and the like. The controller 7b is composed of an electronic circuit unit including, for example, a microcomputer, a memory, an interface circuit, a communication device and the like. In addition, in the present embodiment, the control unit 7b can communicate with the control device 6 of the heat source device 1 and also with the control device 25 of the dishwasher 20 to be described later in a wired or wireless manner. It is possible. Further, the control unit 7b determines whether or not it is a situation in which opening of any one of the hot water taps 15 is predicted as a function realized by the installed hardware configuration and / or the program (software configuration). It includes a function as a plug opening prediction judgment unit for judgment.

  A plurality of remote controllers for driving the heat source device 1 may be provided. Further, the remote controller 7 may include a function capable of communicating with a server on an external network (Internet or the like). In this case, the communication between the remote controller 7 and the control device 25 of the dishwasher 20 can be performed via the server.

  The downstream end of the hot water supply passage 12 is connected to a plurality of downstream hot water supply passages 13 via a header 14. The plurality of downstream hot water supply passages 13 include a downstream hot water supply passage 13a that supplies hot water for hot water supply to each hot water tap 15, and each hot water tap 15 includes a downstream hot water supply passage 13a and a hot water supply passage 12 (hereinafter, It is connected to the heat source machine 1 via the upstream hot water supply passage 12). Each hot water tap 15 is arranged, for example, in a kitchen, a bathroom, a washroom, or the like. Each hot-water tap 15 is not limited to a faucet-shaped hot-water tap, and may be a hot-water tap including a shower head 15s, such as the hot-water tap 15 described near the bath BT in FIG.

  The plurality of downstream hot water supply passages 13 further include a downstream hot water supply passage 13b for supplying hot water to the dish washing machine 20, and the dish washing machine 20 includes the downstream hot water supply passage 13b and the upstream hot water supply passage 13b. It is connected to the heat source device 1 via the hot water supply passage 12.

  Supplementally, in the present embodiment, the combination of the upstream hot water supply passage 12 and the downstream hot water supply passage 13a corresponding to any one hot water tap 15 corresponds to the first hot water supply passage in the present invention, and the header 14 Corresponds to the middle of the first hot water supply passage, and the downstream hot water supply passage 13b corresponding to the dishwasher 20 corresponds to the second hot water supply passage in the present invention. The dishwasher 20 corresponds to the device in the present invention.

  The dishwasher 20 has a cleaning tank 21 connected to the downstream hot water supply passage 13b, a water supply valve 22 capable of opening and closing the downstream hot water supply passage 13b with respect to the cleaning tank 21, and hot water supply water in the cleaning tank 21. Drainage device 23 that can perform drainage operation for draining, various sensors including a temperature sensor 24 attached to cleaning tank 21 so as to detect the temperature of hot water for supplying hot water to cleaning tank 21, and dishwasher 20 The control device 25 having the function of performing the operation control of is mounted.

  The water supply valve 22 is composed of an electromagnetic valve or the like. The drainage device 23 includes a pump 23a attached to the lower portion of the cleaning tank 21 and a drainage channel 23b connected to the cleaning tank 21 via the pump 23a. The pump 23a operates to supply hot water for supplying hot water in the cleaning tank 21. Can be drained from the drainage channel 23b. In the present embodiment, the pump 23a supplies hot water containing cleaning liquid to a cleaning nozzle (not shown) during the normal rotation operation, and discharges drainage from the cleaning tank 21 to the drainage path 23b during the reverse rotation operation. To do.

  The control device 25 is composed of, for example, an electronic circuit unit including a microcomputer, a memory, an interface circuit, a communication device, etc., and the detection signals of the respective sensors including the temperature sensor 24 are input to the control device 25 for operating the heat source device 1. It is possible to perform wired or wireless communication with the remote controller 7.

  Then, the control device 25 controls the operation of the dishwasher 20 including the operation control of the water supply valve 22 and the pump 23a as a function realized by either or both of the installed hardware configuration and the program (software configuration). Have the function to do.

  In the present embodiment, the control device 25 of the dishwasher 20 corresponds to the control unit of the present invention, and the temperature sensor 24 corresponds to the first temperature sensor of the present invention.

  Next, in the present embodiment, an operation when hot water is supplied to any one of the hot water taps 15 will be described. In the present embodiment, in a state where the hot water supply operation of the heat source device 1 is not performed, the control device 6 of the heat source device 1, the control unit 7b of the remote controller 7, and the control device 25 of the dishwasher 20 cooperate with each other. The process shown in the flowchart of FIG. 2 is executed.

  In STEP 1, the control unit 7b of the remote controller 7 is in a situation in which it is predicted that the opening of any one of the hot water taps 15 will be started soon (nearly) by the function of the opening prediction determination unit. Is sequentially executed until the result of the judgment becomes positive. Here, for example, when the heat source device 1 performs a hot water beam operation that automatically performs hot water beaming of the bathtub BT, the user immediately leaves the hot water tap 15 in the bathroom (for example, There is a high possibility that the hot water tap 15 will start to be opened in order to perform a shower bath.

  Therefore, in the present embodiment, when the control unit 7b of the remote controller 7 recognizes that the hot water operation has ended, based on the notification information transmitted from the control device 6 of the heat source device 1, the determination result of STEP1 becomes affirmative. It is determined that the result is YES, and the processing from STEP 2 is started.

  The mode of the determination process in STEP1 is not limited to the above mode. For example, it may be determined that the determination result in STEP 1 is affirmative at a timing immediately before the end of the hot water operation, or at a timing when a predetermined time has elapsed after the start of the hot water operation.

  Further, for example, the ON operation of the hot water supply operation of the heat source device 1 (the operation of putting the heat source device 1 into a water supply waiting state in which the hot water supply operation can be started according to the water flow from the water supply passage 11 to the hot water supply passage 12) is a remote control 7 (or another remote controller), it is highly possible that one of the hot water taps 15 will be opened soon thereafter. Therefore, when the remote controller 7 (or another remote controller) turns on the hot water supply operation of the heat source device 1, it may be determined that the determination result in STEP 1 is affirmative.

  Further, for example, the time when the hot water supply operation is started is learned based on the past (for example, the period up to a predetermined number of days before) hot water supply operation of the heat source device 1, and the time just before the learned time is learned. Therefore, it may be determined that the determination result in STEP 1 is affirmative.

  Further, for example, the remote controller 7 is provided with a switch operated by the user when the user is about to start a hot water supply operation (opening of any hot water supply plug 15) in the near future, and when the switch is operated, It may be determined that the determination result in STEP 1 is affirmative.

  In the next STEP 2 when the result of the determination in STEP 1 is affirmative, the control unit 7 b of the remote controller 7 determines whether the current temperature of the heat source outlet water, which is the water temperature of the hot water supply passage 12 detected by the temperature sensor 5 of the heat source apparatus 1, is present. Is obtained from the control device 6, and it is determined whether or not the detected value of the heat source device outgoing hot water temperature is equal to or lower than a predetermined temperature T1. The predetermined temperature T1 corresponds to the second predetermined value in the present invention. The predetermined temperature T1 may be a predetermined fixed temperature, but may be, for example, a temperature lower than the target hot water supply temperature by a predetermined value.

  In addition, when the determination result of STEP1 becomes affirmative in response to the execution of the hot water beam operation, in STEP2, for example, at the time of or immediately after the start of the hot water beam operation, the heat source device hot water temperature detected by the temperature sensor 5 is detected. The detected value of may be compared with the predetermined temperature T1. Further, when the heat source device feed water temperature, which is the temperature of the hot water supply water supplied from the water supply passage 11 to the heat source device 1, can be detected, in STEP 2, the detected value of the heat source device feed water temperature is compared with the predetermined temperature T1. May be.

  When the determination result of STEP2 is negative, it can be estimated that the hot water for hot water supply in the hot water supply paths 12 and 13a from the heat source device 1 to the hot water taps 15 is not so cold. In this case, the processing from STEP1 is restarted again.

  If the determination result of STEP 2 is affirmative, it can be estimated that the hot water for hot water supply in the hot water supply paths 12 and 13a from the heat source device 1 to each hot water tap 15 is cold. In this case, the control unit 7b of the remote controller 7 causes the dishwasher 20 to set the heat source device 1 based on the state of the dishwasher 20 acquired by communication with the control device 25 of the dishwasher 20 in STEP3. Judge whether or not the water can be forcibly supplied from.

  In this case, for example, when the dishwasher 20 is performing a dishwashing operation, or when the door of the dishwasher 20 (the door for opening and closing the dish in and out of the washing tank 21) is open. The control unit 7b of the remote controller 7 determines that the determination result of STEP3 is negative. In this case, the processing from STEP1 is restarted again.

  If the determination result of STEP3 is affirmative, in STEP4, the control unit 7b of the remote controller 7 controls the dishwasher 20 to force the water supply from the heat source unit 1 to the dishwasher 20. Instruct the device 25.

  In response to this instruction, the control device 25 of the dishwasher 20 executes forced water supply to the dishwasher 20 in STEP 5. Specifically, the control device 25 controls the opening of the water supply valve 22 and operates the pump 23a to cause the drainage device 23 to perform the drainage operation. As a result, hot water is supplied from the heat source device 1 to the cleaning tank 21 via the upstream hot water supply passage 12 and the downstream hot water supply passage 13b. At the same time, water for hot water supply is drained from the cleaning tank 21 through the drainage channel 23b.

  At this time, water is supplied from the water supply passage 11 to the hot water supply passage 12 (the hot water supply water flows into the heat source device 1), so that the control device 6 of the heat source device 1 starts the combustion operation of the burner 2. If the determination result of STEP 1 is made affirmative before the end of the hot water operation, the combustion operation of the burner 2 is continued when the forced water supply to the dishwasher 20 is started.

  During execution of forced water supply to the dishwasher 20, the control device 25 of the dishwasher 20 detects the temperature detected by the temperature sensor 24 of the dishwasher 20 (STEP 6 (the hot water supplied to the washing tank 21). It is sequentially determined whether or not the dishwasher feed water temperature (temperature) has risen to a predetermined temperature T2. The predetermined temperature T2 corresponds to the first predetermined value in the present invention. The predetermined temperature T2 is, for example, a temperature higher by a predetermined value than the detected value of the dishwasher feed water temperature at the start of forced water supply to the dishwasher 20, or a temperature lower by a predetermined value than the target hot water supply temperature. Is used.

  Then, if the determination result in STEP 6 is affirmative, in STEP 9, the control device 25 of the dishwasher 20 controls the water supply valve 22 to close, thereby stopping the forced water supply to the dishwasher 20. .

  Further, during execution of forced water supply to the dishwasher 20, in STEP 7, the control unit 7b of the remote controller 7 determines whether or not the heat source unit 1 is acquired based on the state of the heat source unit 1 acquired by communication with the control unit 6 of the heat source unit 1. It is sequentially determined whether or not an abnormal stop of the heat source device 1 (specifically, an operation stop state of the heat source device 1 in response to the occurrence of an abnormality such as a misfire of the burner 2 or an overheated state of the heat exchanger 3) has occurred.

  Then, when both the determination result of STEP 7 and the determination result of STEP 6 are negative, the process from STEP 5 continues (forced water supply to the dishwasher 20 continues). If the result of the determination in STEP 7 is affirmative, the controller 7b of the remote controller 7 instructs the controller 25 of the dishwasher 20 to stop the forced water supply in STEP 8. In response to this instruction, the controller 25 of the dishwasher 20 controls the water supply valve 22 to be closed in STEP 9 to stop the forced water supply to the dishwasher 20.

  After stopping the forced water supply to the dishwasher 20 in STEP 9, the process from STEP 1 is restarted again.

  In the hot water supply system of the present embodiment, as described above, in the situation where it is predicted that one of the hot water supply taps 15 will soon be opened, except when the judgment result of STEP 2 or 3 is negative. Forced water supply to the washing machine 20 is executed. That is, water is supplied from the water supply path 11 to the dishwasher 20 via the heat source device 1, the upstream hot water supply path 12, and the downstream hot water supply path 13b.

  At this time, the burning operation of the burner 2 heats the hot-water supply water supplied to the dishwasher 20, so that before any one of the hot-water taps 15 is opened (water supply to the hot-water tap 15 is started. Before), the hot water supply water flowing through the upstream hot water supply passage 12 and the downstream hot water supply passage 13b rises in temperature. Therefore, when one of the hot water taps 15 is opened, the hot water for hot water supply in the upstream hot water supply passage 12 is the hot water for hot water supply. The hot water for hot water supply in the upstream hot water supply passage 12 is supplied to the hot water supply tap 15. Therefore, immediately after the hot water tap 15 is opened, it is possible to quickly eliminate the state where cold hot water for hot water is discharged from the hot water tap 15. As a result, the comfort of the user immediately after opening the hot water tap 15 can be improved.

  Further, in particular, when the forced water supply of the dishwasher 2 is executed in response to the hot water operation, when the user takes a shower in the bathroom immediately after the hot water operation, the hot water tap in the bathroom It is possible to prevent increase / decrease fluctuation of the hot water for hot water supply from the shower head 15s of No. 15. Therefore, the comfort of the user can be improved.

  Further, the forced water supply to the dishwasher 20 is executed only in a situation where it is predicted that any one of the hot water taps 15 will soon be opened. Even if it is predicted that one of the hot water supply taps 15 will soon be opened, if the detected value of the heat source device hot water discharge temperature is higher than the predetermined temperature T1 in STEP 2 (in other words, upstream hot water supply). When it is estimated that the hot water for hot water supply in the passage 12 and the downstream hot water supply passage 13a is not so cold), the forced water supply to the dishwasher 20 is not executed. Therefore, it is possible to prevent the forced water supply to the dishwasher 20 with little need and the combustion operation of the burner 2 associated with the forced water supply (the combustion operation with less need) from being performed as much as possible. As a result, energy loss in the hot water supply system and water resource loss can be effectively suppressed.

  The present invention is not limited to the embodiment described above, and other embodiments can be adopted. Some other embodiments will be described below.

  In the embodiment, the header 14 is provided between the heat source device 1, the hot water tap 15, and the dishwasher 20 (apparatus), but the header 14 may not be provided. For example, a hot water supply passage (second hot water supply passage) from the middle of a continuous hot water supply passage (first hot water supply passage) from the heat source device 1 to one hot water supply tap 15 (second hot water supply passage), or another hot water supply The hot water supply passage leading to the stopper 15 may be branched.

  Further, in the above-described embodiment, the dishwasher 20 is exemplified as the device in the present invention, but the device is not limited to the dishwasher and may be a device such as a washing machine.

  Further, in the above-described embodiment, the drainage operation of the drainage device 23 of the dishwasher 20 is performed in parallel with the forced water supply to the dishwasher 20, but, for example, after the forced water supply of the dishwasher 20 is completed. The drainage operation of the drainage device 23 may be performed. Further, for example, after the forced water supply of the dishwasher 20 is completed, hot water is stored in the cleaning tank 21 until a predetermined time has elapsed, and the dishwashing operation of the dishwasher 20 is started within the predetermined time. In this case, the stored hot water may be used for cleaning. The same applies to devices other than the dishwasher 20.

  Further, in the processing shown in the flowchart of FIG. 2, for example, the execution order of the determination processing in STEPs 1 to 3 may be arbitrarily changed. In addition, part of the processing of the control unit 7b of the remote controller 7 in the flowchart (for example, the processing of any one of STEPs 1 to 3) is performed by the control device 6 of the heat source device 1 or the control device 25 of the dishwasher 20. It may be executed. Furthermore, when the control unit 7b of the remote controller 7 and the control device 25 of the dishwasher 20 can communicate with an external server, the server performs a part of the processing of the control unit 7b of the remote controller 7 (for example, It is also possible to execute some of the processing of STEPs 1 to 3 and 7 or a part of the processing of the control device 25 (for example, the processing of STEP 6).

  Further, in the above-described embodiment, the forced water supply to the dishwasher 20 is executed when the determination result of STEP2 is affirmative. However, even when the determination result of STEP2 is negative, the dishwasher 20 is not supplied with water. You may implement forced water supply. However, in order to suppress energy loss and water resource loss in the hot water supply system as much as possible, it is preferable to execute forced water supply to the dishwasher 20 as in the above embodiment.

  Further, in the above-described embodiment, after the forced water supply to the dishwasher 20 is started, the forced water supply is executed until the dishwasher supply water temperature rises to the predetermined temperature T2. However, for example, the forced water supply is started. After that, the forced water supply may be executed in a period until a predetermined time elapses.

DESCRIPTION OF SYMBOLS 1 ... Heat source machine, 5 ... Temperature sensor (2nd temperature sensor), 7b ... Control part (opening prediction judgment part), 12 ... Hot water supply path (1st hot water supply path), 13a ... Downstream side hot water supply path (1st hot water supply path) ), 13b ... Downstream hot water supply passage (second hot water supply passage), 14 ... Header (middle portion), 15 ... Hot water tap, 20 ... Dishwasher (equipment), 22 ... Water supply valve, 23 ... Drainage device, 24 ... Temperature Sensor (first temperature sensor), 25 ... Control device (control unit).

Claims (5)

A heat source device for heating the hot water for hot water supply and injecting hot water when the hot water for hot water supply flows in;
A hot-water tap connected to the heat-source device through a first hot-water supply path so that hot-water for hot-water supply from the heat-source device can be supplied;
A water supply valve that is connected to the middle of the first hot water supply passage through a second hot water supply passage so that hot water for hot water discharged from the heat source device can be supplied from the middle of the first hot water supply passage, and the second hot water supply passage can be opened and closed. A hot water supply system including a device including:
An uncapping prediction determining unit that determines whether or not the hot water tap is predicted to be unsealed,
And a control unit for controlling the opening of the water supply valve so as to perform water supply to the device for a predetermined period when the judgment result of the opening prediction judgment unit becomes affirmative. Hot water supply system. The hot water supply system according to claim 1,
The device is provided with a drainage device capable of performing a drainage operation for draining the supplied hot water.
The control unit is configured to further have a function of controlling the drainage device so that the drainage operation of the drainage device is performed in parallel with the valve opening control of the water supply valve or after the completion of the valve opening control. Hot water supply system characterized by being. The hot water supply system according to claim 1 or 2,
The device includes a first temperature sensor capable of detecting the temperature of the hot water for hot water supplied from the second hot water supply passage,
The hot water supply system is characterized in that the predetermined period is a period after the water supply to the device is started until the temperature detected by the first temperature sensor rises to a temperature equal to or higher than a first predetermined value. The hot water supply system according to any one of claims 1 to 3,
The heat source machine includes a second temperature sensor capable of detecting the temperature of the hot water for hot water discharged to the first hot water supply passage or the temperature of the hot water for hot water flowing into the heat source machine.
When the determination result of the uncapping prediction determining unit becomes affirmative, the control unit determines that the temperature detection value of the second temperature sensor in the state in which water is not flowing through the first hot water supply passage is the second. 2. A hot water supply system configured to execute valve opening control of the water supply valve on condition that the temperature is equal to or lower than a predetermined value. The hot water supply system according to any one of claims 1 to 4,
The heat source machine is capable of performing hot water beam operation for hot water beaming to a bathtub,
The hot water supply system, wherein the open-caption prediction determination unit is configured to make the determination result affirmative when the hot-water running operation of the heat source device is executed.