JP2006097999A - Hot water supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply system capable of operating each function of a hot water supply apparatus without needing the operation of an operation switch usually and performing no combustion operation when a faucet is opened as antifreezing measures in a cold district or the like. <P>SOLUTION: The hot water supply apparatus 1 has a first set state and a second set state. In the first set state, when a stream of predetermined flow or more is detected by a stream detecting means even in an operation OFF mode, the operation mode is automatically shifted to an operation ON mode. Afterwards, unless switching operation to the operation OFF mode is performed by an operating device 2, the operation ON mode is maintained even if the stream has less than the predetermined flow. In the second set state, unless switching operation to the operation ON mode is performed by an operation mode switching means, the operation mode is maintained to the operation OFF mode even if the stream of the predetermined flow or more is generated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hot water supply system, and more particularly to a hot water supply system including a hot water supply device and an operation device thereof.

  Conventionally, in a main body operation type hot water supply device such as a hot water supply device dedicated to general hot water supply, when a water flow exceeding a predetermined flow rate is generated in the hot water supply device by opening the hot water supply curan connected to the hot water supply device by piping, Used a simple mechanism that heats the water supplied from the water intake pipe and supplies it to the hot water supply curan, that is, hot water comes out when the curan is opened, so that the user was not confused about the operation of the hot water supply device. .

  Recently, however, the hot water supply device has not only the hot water supply (hot water supply function) to Karan, but also functions such as hot water filling to the bathtub and further supplying hot water to the hot water heater and dishwasher etc. Are substantial. Therefore, what is called an operation switch is provided in the operation device (remote control) of the recent hot water supply device.

  The operation switch switches between two operation modes, an operation on mode in which a function (for example, a hot water supply function) provided in the hot water supply device is operable and an operation off mode in which the function is inoperable. If the operation switch is not set to the operation on mode, the hot water is not discharged from the curan even if the hot water supply curan is opened in this state.

  In addition, such a hot water supply system is widely used regardless of the region, especially in an area where the water in the hot water supply device or the piping may freeze in the winter, such as in a cold region. Measures to prevent water freezing are required. And as a countermeasure against this kind of freezing, for example, it has been proposed to provide a heater in the hot water supply device itself or the pipe itself, but the hot water tap is opened to cause water to flow in the hot water supply device or the pipe. Some of them prevent freezing, especially in the latter case (measures to prevent freezing due to water flow), when the operation switch is turned on (in the operation on mode), the hot water supply device is activated (combustion operation). In some cases, therefore, a device for preventing the hot water supply device from operating even in the operation-on mode is required (see, for example, Patent Document 1).

JP 2002-188818 A

However, as described above, the hot water supply system provided with the operation switch in the operation device has been enhanced in its functions, but if the operation switch is not operated, the hot water does not come out even if the hot water supply curl is opened. For users who often use hot water in the kitchen or washroom (users who often use the hot water supply function) and those who are not familiar with remote control operations such as elderly people, the operation of the operation switch is cumbersome and easy to use It was inferior to the conventional main body operation type hot water supply device.

  Therefore, as a countermeasure, it is encouraged for such users to always keep the operation switch on (operation on mode), but it seems that the operation on mode was automatically canceled due to a power failure or the like. In such cases, the hot water cannot be obtained unless the operation switch is re-operated, so the fundamental solution has not been reached, and a hot water supply system that can eliminate the operation of the operation switch in a multifunctional hot water supply device is desired. It had been.

  On the other hand, when trying to propose a hot water supply system that does not have an operation switch like the main body operation type hot water supply device, when the hot water supply curan is opened as a freeze prevention measure in a cold district as described above. It is necessary to construct a system that does not start combustion operation.

  The present invention has been made in view of such conventional problems, and the object of the present invention is to enable each function of the hot water supply device to operate without requiring operation of an operation switch. An object of the present invention is to provide a hot water supply system in which a combustion operation is not performed when a curan is opened as a freeze prevention measure in a cold region.

  In order to achieve the above object, a hot water supply system according to claim 1 of the present invention is a hot water supply system including a hot water supply device and at least one operation device for operating the hot water supply device, and the hot water supply device. Two operation modes, an operation on mode in which the function included in the function is operable and an operation off mode in which the function is disabled, are provided, and at least one of the operation devices has the two operation modes interchanged. In the hot water supply system provided with the operation mode switching means configured to be switchable, when the operation mode is in the operation off mode, when the water flow exceeding the predetermined flow rate is generated in the water heater, the operation on mode is automatically set. After that, unless the operation mode switching means performs the switching operation to the operation off mode, the operation is performed even if the water flow becomes less than the predetermined flow rate. The operation mode is maintained in the operation-off mode even when a water flow exceeding the predetermined flow rate is generated when the operation mode is in the first setting state and the operation-off mode. And at least one of the operating devices is provided with setting state switching means configured to be able to switch between the two setting states. It is characterized by.

  Further, the hot water supply system according to claim 2 of the present invention is the hot water supply system according to claim 1, wherein when the setting state switching means is in the second setting state, the operation mode switching means operates in the operation mode. When the operation for switching the operation mode to the operation on mode is performed, the first setting state is set thereafter.

  Moreover, the hot water supply system according to claim 3 of the present invention is the hot water supply system according to claim 1 or 2, wherein a plurality of the operation devices are provided, wherein the operation mode switching means and the setting state switching means are: It is provided only in a specific operating device among the plurality of operating devices.

  According to the present invention, when the hot water supply system is in the operation off mode, if a water flow of a predetermined flow rate or more occurs in the hot water supply device, the hot water supply system automatically shifts to the operation on mode, and then switches to the operation off mode. As long as the operation is not performed, when the water flow is less than the predetermined flow rate, the first setting state in which the operation on mode is maintained and the water flow of the predetermined flow rate or more is generated when the hot water supply system is in the operation off mode. Even at least one of the operating devices has a setting state switching means configured to be able to switch between the two setting states, the second setting state maintaining the operation off mode. Because it is provided, by setting the first setting state in normal use, without worrying about whether the operation mode is the operation on mode or the operation off mode (in other words, If the hot water supply can be obtained simply by opening the hot water supply curan (without operating the operation switch), on the other hand, if it is necessary to take measures to prevent freezing in cold regions, the hot water supply system is set to the second setting state. By doing so, even if the hot water supply currant is opened, the combustion operation is not performed, and an easy-to-use hot water supply system can be provided.

  According to the hot water supply system of the second aspect, when the hot water supply system is in the second setting state, when the operation mode is switched to the operation on mode by the operation mode switching means, Thereafter, since the first setting state is set, when the freeze prevention measure is no longer necessary, the freeze prevention measure can be easily canceled by switching the operation mode to the operation on mode. Can use the hot water supply system without worrying about the operation mode.

  Furthermore, according to the hot water supply system according to claim 3, a plurality of the operation devices are provided, and among them, only the specific operation device is provided with the operation mode switching means and the setting state switching means. Since the operation mode switching means and the setting state switching means can be eliminated from the operating device to be operated, the number of operation switches of the operating device can be reduced, so that a user who is unfamiliar with machine operation does not hesitate to operate. Can provide a system.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram showing a schematic configuration of a hot water supply system of the present invention. As shown in the figure, this hot water supply system includes a hot water supply device 1 and at least one operation device 2 for operating the hot water supply device 1.

  The hot water supply device 1 heats water supplied from a water inlet pipe 10a by a heat exchanger (not shown) and supplies hot water to a hot water tap such as a hot water supply curan or a shower (not shown) via a hot water outlet pipe 10b (hot water supply). Function) and other functions (in this embodiment, an automatic hot water filling function for a bathtub not shown in the figure and a bathing function), as shown in FIG. The detection means 12 is provided.

  The control means 11 is a control device for mainly controlling the operation of each part of the hot water supply device 1 and communicating with the operation device 2, and is mainly composed of a microcomputer provided with control software. . The control software includes a control program related to an operation mode described later.

  The flow rate detecting means 12 detects whether or not a water flow of a predetermined flow rate (for example, the minimum operating water flow rate necessary for burner combustion) has occurred in the hot water supply device 1. A hot water flow rate sensor (not shown) for detecting the hot water flow rate from the apparatus 1 and a flow rate determination unit (function of the control means 11) for determining the presence or absence of a water flow above the predetermined flow rate based on a detection signal of the hot water flow rate sensor. Partly assigned).

  In this embodiment, the hot water supply device 1 includes a bathroom remote controller 2a installed in the bathroom and a kitchen remote controller 2b installed in a place other than the bathroom such as a kitchen. Each remote controller 2a, 2b in the bathroom and kitchen and the hot water supply device 1 are interconnected by a two-core communication line 3, and each remote control 2a, 2b is supplied with electric power from the hot water supply device 1 through the communication line 3. The control means 11 of the hot water supply device 1 and the control units (not shown) of the remote controllers 2a and 2b are configured to be able to communicate with each other. That is, each of the remote controllers 2a and 2b is configured to receive power from the hot water supply device 1 by the power supply superposition communication method. Further, as will be described later, the remote controllers 2 a and 2 b are configured to be able to talk to each other via the communication line 3.

  In addition, since the other structure of the hot water supply apparatus 1 is the same as that of a normal hot water supply apparatus, the description is abbreviate | omitted.

  FIG. 2 is a front view showing the appearance of the bathroom remote control 2a, FIG. 2 (a) shows the appearance of the bathroom remote control 2a with the front operation panel closed, and FIG. 2 (b) shows the same. The external appearance of the state which opened the front operation panel of the bathroom remote control 2a is shown.

  As shown in the figure, the bathroom remote controller 2a is configured such that an operation panel 21 (hereinafter referred to as a first operation panel 21) on the front surface of the housing can be opened and closed with a hinge portion 22 as an axis. A second operation panel 23 is provided below the panel 21.

  A push button unit 4 is attached to the first operation panel 21, and a first operation switch group 5 is formed on the front surface of the first operation panel 21 by the push button unit 4. When the first operation switch group 5 is pressed with the first operation panel 21 closed, the push button unit 4 presses a predetermined operation switch in a second operation switch group 7 to be described later. This is a unit configured as described above. Accordingly, the operation mode of the control unit of the bathroom remote control 2a (assigned to a second operation switch group 7 to be described later) depends on whether the first operation panel 21 is opened or closed. Function) can be switched. The opening / closing state of the first operation panel 21 is detected by, for example, a magnet (not shown) and a magnetic sensor connected to the control unit of the operation device.

  In the present embodiment, as the first operation switch group 5 provided on the front surface of the first operation panel 21, as shown in the figure, an automatic bath filling switch (a bath automatic operation) for starting an automatic bath filling operation (a bath automatic operation) is started. "51", a "chairing switch" 52 for starting the bathing heating operation, and a "calling switch" 53 for enabling communication with the kitchen remote control 2b. In addition, what is shown by the code | symbol a in each operation switch 51-53 is the lighting display part which shows that the said function is act | operating by operation of each switch.

  On the other hand, the second operation panel 23 is provided with a display unit 6 for displaying settings and operating states of the hot water supply device 1 (not shown) and a second operation switch group 7. In the present embodiment, the second operation switch group 7 includes an operation switch (operation mode switching means) 71, a hot water supply set temperature up switch 72, the down switch 73, a volume setting switch 74, a call switch 75, a bath set temperature. Are provided with an up switch 76, a down switch 77, an up switch 78 for the amount of hot water set, and a down switch 79. In addition, the point that the lighting display part a is appropriately provided in each switch is the same as in the case of the first operation switch group 5.

  Here, the operation switch 71 is an operation on state that enables the functions of the hot water supply device 1 (in the present embodiment, as described above, the hot water supply function, the bath automatic hot water filling function, and the bath chasing function). This is a switch for switching between two operation modes, that is, a mode and an operation off mode in which these functions cannot be operated. The call switch 75 is a switch that enables a call with the kitchen remote controller 2b, similar to the call switch 53 provided on the first operation panel 21.

  In addition, the hot water set temperature up switch 72 and the down switch 73 are switches for changing the hot water set temperature, and the bath set temperature up switch 76 and the down switch 77 and the bath set hot water amount are increased. The switch 78 and the down switch 79 are switches for changing the bath water temperature and amount during bath automatic operation. Note that the volume switch 74 is a switch for adjusting the volume of an incoming call from the kitchen remote controller 2b, and for alarms, voice messages, and the like.

  As described above, when the first operation panel 21 is closed, the bathroom remote controller 2a shown in the present embodiment has a bath automatic switch 51, a follow-up switch 52, and a call switch 53 on the front surface of the panel 21. Only the three operation switches appear, and the other operation switches (second operation switch group 7) 71 to 79 and the display unit 6 are configured to be hidden by the first operation panel 21.

  This is because the hot water supply system of the present invention is configured such that the above functions of the hot water supply device 1 can be operated without operating the operation switch 71, as will be described later. This is because the operation panel 23 is provided (that is, usually hidden by the first operation panel 21), and the first operation panel 21 is provided with only the operation switches that are normally used and the switches that are necessary in an emergency. In addition, this makes it possible to reduce the number of operation switches that appear on the front surface of the bathroom remote controller 2a, and to provide an operation device that is easy to operate even for users who are not familiar with machine operations.

  In the present embodiment, the first operation panel 21 is provided with the automatic bath switch 51 and the follow-up switch 52. In the present embodiment, the hot water supply device 1 is provided with the hot water supply function and automatic hot water filling to the bathtub. As it has a function and a bathing function, the hot water supply function is configured so that hot water is automatically obtained by opening the hot water tap, so there is no need to provide an operation switch on the front as in the conventional case. However, the automatic hot water filling function for the bathtub and the chasing function of the bath are because a switch as a trigger for operating these functions is necessary. The call switch 53 is provided so that the kitchen remote controller 2b can be called without opening the first operation panel 21 in an emergency or the like.

  On the other hand, since the hot water set temperature, bath set temperature, bath set hot water volume, volume setting, and the like are not frequently changed once set, these operation switches 72 to 74 and 76 to 79 are second switches. The operation panel 23 is provided. Further, as shown in FIG. 2 (b), the display unit 6 displays the bath set temperature and the hot water supply set temperature in the normal default display, but the normal use of the hot water supply apparatus 1 is possible without these displays. In this embodiment, it is configured to be hidden under the first operation panel 21.

  FIG. 3 is a front view showing an appearance of the kitchen remote controller 2b. As shown in the figure, the kitchen remote controller 2b is provided with an operation switch group 8 including two operation switches, a bath automatic switch 81 and a call switch 82, on the operation panel 25 on the front surface of the casing. A hidden lid structure like the remote control 2a is not adopted. Moreover, the display part and operation switch with which the kitchen remote control in the conventional hot-water supply system is provided are not provided. That is, only the automatic bath switch 81 and the call switch 82 are provided on the front side of the kitchen remote controller 2b shown in the present embodiment. In addition, it is the same as that of the said bathroom remote control 2a that the lighting display part a which shows that this function is act | operating is provided in each of these operation switches 81 and 82.

  Here, the operation panel 25 of the kitchen remote control 2b is provided with only the automatic bath switch 81 and the call switch 82, and the display unit and other operation switches are not provided. It is substantially the same. That is, the hot water supply system of the present invention is configured so that the above-described functions of the hot water supply device 1 can be operated without operating the operation switch, as will be described later. This is because by providing only necessary switches on the operation panel 25, the number of switches appearing in front of the kitchen remote control 2b is reduced, and an operation device that is easy to operate even for a user unfamiliar with machine operation is provided.

  Then, next, the operation | movement of the hot-water supply system of this invention demonstrates in detail the relationship with operation of the said operation switch 71. FIG.

  That is, the control means 11 of the hot water supply device 1 is in the operation-on mode on the premise that the hot water supply function and other functions (automatic hot water filling function and bathing function) described above are activated. It is a condition. In other words, when in the operation on mode, the automatic hot water filling function and the bathing function for the bathtub are made operable, and the water flow detecting means 12 is opened by opening the hot water tap. It is set so that the hot water supply device 1 starts the combustion operation (water heating) when the generation of a water flow of a predetermined flow rate or more is detected. In other words, when the control means 11 is in the operation off mode, the hot water supply device 1 is set not to perform the combustion operation even if the hot water tap is opened.

  Further, in the hot water supply system of the present embodiment, this operation on mode is performed even when the combustion operation is stopped (that is, when the water flow detected by the water flow detection means 12 is less than the predetermined water amount). The switch 71 is set to be maintained as long as the switching operation to the operation-off mode is not performed.

  Thereby, for example, in the hot water supply system of the present embodiment, when a predetermined error occurs in the hot water supply device 1 during the operation on mode, the hot water supply device 1 is in a safe operation state (a state where the device is controlled to the safe side, the basic The error code is displayed on the display unit 6 of the bathroom remote controller 2a, and the safe operation state is released from the operation on mode to the operation off mode by the operation switch 71. Although it is configured to be performed at the timing of switching, as described above, since the operation on mode is maintained even when the water flow becomes less than the predetermined flow rate, unless the release operation of the safe operation state is positively performed, The display of the error code on the display unit 6 does not disappear.

  On the other hand, when in the operation off mode, the bathroom remote controller 2a has the display unit 6 turned off, the hot water supply set temperature up / down switches 72 and 73 on the second operation panel 23, and the bath setting. Changes in these settings by the temperature up / down switches 76 and 77 and the hot water set up / down switches 78 and 79 are not accepted.

  As described above, the operation mode can be switched between the operation on mode and the operation off mode by operating the operation switch 71. In the present invention, the operation mode is also switched in the following cases. It is set to be.

  That is, even when the operation mode is the operation off mode, the control means 11 automatically shifts to the operation on mode when a water flow of the predetermined flow rate or more is generated in the hot water supply device 1, and then the operation switch 71 Unless the switching operation to the operation off mode is performed, the operation mode is set to be maintained in the operation on mode even when the water flow becomes less than the predetermined flow rate.

  Specifically, when the operation mode is the operation off mode, when the hot water tap is opened and a water flow exceeding the predetermined flow rate is generated in the hot water supply device 1, “there is a water flow” is detected by the flow rate detection means 12. The The detection result is transmitted as a water flow detection signal to one of the remote controllers 2a and 2b. Here, it is assumed that this water flow detection signal is transmitted to the bathroom remote controller 2a provided with the operation switch 71.

  In this way, when the water flow detection signal is transmitted to the bathroom remote control 2a, the bathroom remote control 2a side switches the operation mode of the control unit to the operation on mode on condition that the water flow detection signal is received, A signal (operation on mode command signal) instructing to switch the operation mode to the operation on mode is transmitted to the control means 11 of the apparatus 1 and the control unit of another remote control (in this case, the kitchen remote control 2b). Here, when the control unit of the bathroom remote control 2a itself shifts to the operation on mode, the control unit lights the lighting display unit a of the operation switch 71 to display that the operation mode is in the operation on mode.

  On the other hand, the control means 11 of the hot water supply apparatus 1 that has received the operation on mode command signal from the bathroom remote controller 2a switches the operation mode to the operation on mode. As a result, the hot water supply device 1 is in the operation on mode. When it is determined in this state that the water flow detection means 12 has a water flow of a predetermined flow rate or higher, a burner (not shown) is burned and a hot water supply operation is started. That is, two conditions for the hot water supply device 1 to start the combustion operation satisfy the two conditions that the operation mode is the operation on mode and that the water flow of the predetermined flow rate or more is detected in the water flow detection means 12. It has been the case.

  Even when the hot-water tap is not opened (that is, when the flow rate detecting means 12 does not detect a water flow of a predetermined flow rate or higher), the remote control units 2a and 2b are used in advance in the hot-water supply system of this embodiment. Predetermined operation switches that have been set, specifically, operation switches 51, 52, and 81 provided on the front surfaces of the remote controllers 2a and 2b and instructing the start of the automatic hot water filling function or bathing function to the bathtub. When any one of these is operated, the operation on mode command signal is transmitted.

  That is, in this case, at the time when each of the operation switches 51, 52, 81 is operated, water flow is not yet generated in the hot water supply device 1, but the user intends to start the operation of each function. Since it is clear, the operation mode is also switched in this case. Therefore, for example, when any one of the automatic bath switches 51 and 81 is operated, the operation device 2 side transmits an operation on mode command signal to the hot water supply device 1 together with operation signals of these operation switches. Thereby, the control means 11 of the hot water supply device 1 switches the operation mode to the operation on mode, and controls according to the operation signal (when the automatic bath switches 51 and 81 are operated, water is dropped into the bathtub). Is started, and the combustion operation is started in the hot water supply apparatus 1 from the time when the water flow detecting means 12 detects the generation of the water flow.

  Thus, in the hot water supply system of the present invention, the user simply opens the hot water supply curl or operates the automatic bath switches 51 and 81 and the bath follower switch 52 without operating the operation switch 71. Since the operation mode can be automatically set to the operation on mode, each function of the hot water supply apparatus 1 can be activated or operable without operating the operation switch 71, and the hot water supply system that is easy to operate. Can provide.

  Note that the hot water supply system that has automatically shifted to the operation-on mode in this way is set to maintain the operation-on mode even if the water flow detection means 12 does not detect the water flow. And when returning to driving | running-off mode again, it switches to driving | running-off mode by operating the said operation switch 71 again.

  By the way, if it is configured such that each function of the hot water supply device 1 can be activated or activated without operating the operation switch 71 as described above, the combustion operation is automatically performed when the hot water tap is opened as a measure to prevent freezing. May start. Therefore, the hot water supply system of the present invention has the second setting state in which the above-described state is set to the normal setting state (first setting state) and the combustion operation is not started when the anti-freezing measures are taken. Configured.

  The second set state is a state in which the operation mode is maintained in the operation off mode even when the water flow detection means 12 detects a water flow of a predetermined flow rate or more when the hot water supply system is in the operation off mode. The first setting state and the second setting state can be switched by at least one operating device (for example, bathroom remote controller 2a) of the operating devices 2.

  Specifically, in the second setting state, the water flow detection of the water flow detecting means 12 and the switching of the operation mode are set so as not to be linked as in the first setting state described above. That is, the control means 11 of the hot water supply device 1 automatically transmits a water flow detection signal to the bathroom remote controller 2a when the water flow detection means 12 detects a water flow of a predetermined flow rate or higher, but whether or not to switch to the operation on mode. (Whether or not to transmit the operation on mode command signal) is configured to be determined by the control unit of the bathroom remote control 2a. Under this second setting state, the control unit of the bathroom remote control 2a is Even when the water flow detection signal is received, the operation on command signal is not transmitted to the other operation device (kitchen remote control 2b) or the hot water supply device 1.

  Then, when the bathroom remote controller 2a can switch the setting state, for example, it can be set by a predetermined operation of the operation switch provided in the bathroom remote controller 2a, such as a long press of the operation switch 71 of the bathroom remote controller 2a. Switching is enabled (that is, in this case, the operation switch 71 constitutes a setting state switching unit that switches between the first and second setting states). In addition, when this 2nd setting state is selected, the display which shows that the 2nd setting state is selected, such as performing the display on the display part 6 of the bathroom remote control 2a, is the operation apparatus 2 side. Configured to do.

  As for the return operation from the second setting state to the first setting state, when the hot water supply system is in the second setting state, the operation of the operation switch 71 or the automatic bath switches 51 and 81 are performed. Alternatively, when the operation of switching the operation mode to the operation on mode is performed, such as the operation of the follow-up switch 52, the operation is returned to the first setting state thereafter.

  As described above, the hot water supply system of the present invention has the second set state in which the combustion operation is not started when the hot water tap is opened as a freeze prevention measure. Therefore, it is necessary to take a freeze prevention measure such as in a cold district. Freezing protection can be easily adopted in certain areas. In particular, since the opening of the hot water tap for preventing freezing usually takes a long time, if the hot water supply device 1 performs the combustion operation at that time, the amount of fuel consumption increases, but in the hot water system of the present invention, Since it has the 2nd setting state which does not start a combustion operation even if it opens a hot-water tap, there is no useless fuel consumption and it can provide an environmentally friendly hot-water supply system.

  As described above, in the hot water supply system of the present invention, each function of the hot water supply device 1 can be activated or operable without operating the operation switch 71 during normal use of the system. The operation switch 71 can be eliminated (hidden) from the front surface of the controller device 2, thereby reducing the number of operation switches provided on the front surface of the controller device 2.

  Moreover, it is sufficient that the operation switch 71 and the setting state switching means are provided in at least one of the operation devices 2 connected to the hot water supply device 1, so that the other operation devices 2 (for example, the above-described above-mentioned items) With respect to the kitchen remote controller 2b), the display unit 6 can be omitted or the number of operation switches can be further reduced, and a hot water supply system that can be used without resistance even by a user unfamiliar with machine operation can be provided.

  In addition, embodiment mentioned above shows the preferred embodiment of this invention, Comprising: This invention is not limited to these, A various design change is possible within the range.

  For example, in the above-described embodiment, a hot water flow rate sensor is used as the water flow detection means 12, but this water flow detection means 12 uses hot water from a hot water tap such as a currant or a shower, that is, a water flow in a circuit for general hot water supply. Any means may be used for detection, and other sensors such as an incoming water flow rate sensor may be used as long as the sensor detects this type of water flow.

  In the above-described embodiment, the case where the operation switch 71 is used to cancel the second set state has been described. For example, the automatic switch 51 or 81 or the automatic follower switch 52 is operated. It can also be configured to be released by operating an operation switch provided on the front surface of the apparatus 2.

It is explanatory drawing which shows schematic structure of the hot water supply system which concerns on this invention. It is a front view which shows the external appearance of the bathroom remote control in the hot-water supply system, FIG.2 (a) has shown the external appearance of the state which closed the front operation panel of the bathroom remote control, and FIG.2 (b) is the bathroom remote control. The external appearance of the state where the front operation panel is opened is shown. It is a front view which shows the external appearance of the kitchen remote control in the hot-water supply system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water supply apparatus 2 Operation apparatus 3 Communication line 2a Bathroom remote control 2b Kitchen remote control 11 Hot water supply control means 12 Water flow detection means 21 First operation panel 23 of bathroom remote control Second operation panel 25 of bathroom remote control Operation panel 71 of kitchen remote control Operation switch (operation mode switching means)

Claims (3)

A hot water supply system including a hot water supply device and at least one operation device for operating the hot water supply device, wherein an operation on mode for enabling a function of the hot water supply device is operable, and the function is disabled. In a hot water supply system provided with two operation modes, and an operation mode switching means configured to be able to switch between the two operation modes, at least one of the operation devices.
When the operation mode is the operation off mode, when a water flow of a predetermined flow rate or more occurs in the hot water supply device, the operation mode automatically switches to the operation on mode, and then the operation mode switching means switches to the operation off mode. A first setting state that is set to maintain the operation mode in the operation on mode even when the water flow is less than the predetermined flow rate,
A second setting state that is set to maintain the operation mode in the operation off mode even when a water flow of the predetermined flow rate or more occurs when in the operation off mode;
A hot water supply system, wherein at least one of the operating devices is provided with a setting state switching means configured to be able to switch between the two setting states.   If the operation mode switching means is operated to switch the operation mode to the operation on mode when the setting state switching means is in the second setting state, the first setting state is set thereafter. The hot water supply system according to claim 1.   The hot water supply system provided with a plurality of the operation devices, wherein the operation mode switching means and the setting state switching means are provided only in a specific operation device among the plurality of operation devices. Or the hot-water supply system of 2.

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