JP2553209Y2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat exchanger for heating water heated by a burner, a fuel supply control valve for controlling a fuel supply to the burner, and a fuel supply control valve. , Ignition means for igniting the burner, a water amount adjusting valve for adjusting the amount of water to the heat exchanger, a hot water temperature adjusting operation tool for adjusting the temperature of hot water from the heat exchanger, The present invention relates to a water heater including a water flow sensor for detecting water flow to the heat exchanger, and a control device for controlling combustion of the burner by input of a water flow signal from the water flow sensor. [Prior Art] In such a water heater, a special water switch is provided in order to enable not only water supply but also water supply. When the water supply switch is operated, the water supply signal is affected by a water supply signal from a water supply sensor. Instead, a control device outputs a control signal for closing a fuel supply valve, thereby extinguishing a burner and discharging water. However, in this conventionally known water heater, it is necessary to add a function of outputting a control signal for opening and closing the fuel supply valve in accordance with operation of the water switch to the control device, and the configuration of the control device becomes complicated. This leads to higher costs. Therefore, when a switch is provided between the control device and the power supply circuit as in the water heater described in Japanese Utility Model Application Laid-Open No. 62-85858 and the hot water temperature adjusting operation tool is operated to the water discharge position, the switch is turned off. What is known is that a signal corresponding to a non-water flow signal is input to the control device irrespective of a water flow signal from a water flow sensor, thereby extinguishing a burner and discharging water. . [Problems to be Solved by the Invention] According to this conventionally known water heater, water can be discharged without particularly complicating the configuration of the control device. In addition, since the temperature is adjusted by changing the mixing ratio of hot water and hot water, there is a disadvantage that it is difficult to perform a wide range of temperature control from high-temperature water to low-temperature water. Furthermore, it is desirable to reliably shut off the fuel supply to the burner when the water is discharged after the burner has been digested. However, there is insufficient room for improvement in this regard, and there is room for improvement. The purpose of the present invention is not only to enable water discharge without complicating the control device, but also to provide water, as in the case of the conventional water heater,
By further developing it, it is possible to reliably control the temperature of the hot water over a wide range from hot water to low-temperature water. An object of the present invention is to provide a water heater that can reliably perform wide water supply and hot water supply and that can reliably shut off combustion supply to a burner in a water discharge state after digestion of a burner. [Means for Solving the Problems] In order to achieve this object, the characteristic configuration of the water heater according to the present invention is to provide a gas valve for interrupting the supply of fuel to the burner, and a control device for controlling the combustion of the burner. The ignition means is activated by the input of the water flow signal from the water flow sensor, and the gas valve is opened to burn the burner, and the gas valve is closed by the input of the non-water flow signal from the water flow sensor. And a water discharge operation means for inputting a water discharge signal for closing the gas valve to the control device regardless of an output signal from the water flow sensor, and providing the water discharge operation means with the hot water temperature. In addition to being configured to be operable by the adjusting operation tool, the water temperature adjusting valve and the fuel supply amount adjusting valve are linked to the hot water temperature adjusting operating tool via a gear-type interlocking mechanism. [Operation] As described above, the state can be switched between the state in which the output signal from the water flow sensor is input to the control means and the state in which the output signal corresponding to the non-water flow signal is input to the control means by the water discharge operation means. Since the means is configured to be operable by the hot water temperature adjusting operation tool, the operation of the hot water temperature adjusting operation tool changes the tapping state from the tapping state to the tapping state without adding a special function to the control device itself. It can be freely switched from the state to the hot water state. The hot water temperature adjusting operation tool is interlocked with a water amount adjusting valve for adjusting the amount of water to the heat exchanger and a fuel supply amount adjusting valve for adjusting the amount of fuel supplied to the burner. By adjusting both the amount of water supplied to the heat exchanger and the amount of fuel supplied to the burner, it is possible to control the temperature over a wide range from hot water to cold water, which are important for water heaters. In addition, since the hot water temperature adjusting operation tool, the water amount adjusting valve and the fuel supply amount adjusting valve are interlockingly connected via a gear type interlocking mechanism, the interlocking is ensured, and the temperature can be adjusted over a wide range. Can be performed reliably. In this way, the operation of one hot water temperature adjusting operation device allows water to be discharged and water to be discharged under a wide range of temperature control. In addition, in the water discharge state, the gas valve for interrupting the supply of fuel to the burner is closed. Since it is a valve, the supply of fuel to the burner can be reliably cut off and water can be safely discharged. [Effects of the Invention] As a result, it is possible to perform tapping and tapping with one hot water temperature adjusting operation tool while eliminating the need to add a function to the control device, and in the hot water tapping state, by operating the same hot water temperature adjusting operating tool, The hot water temperature can be reliably adjusted over a wide range from high-temperature hot water to low-temperature hot water, and in a water discharge state, the supply of fuel to the burner can be reliably turned off and used safely. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a burner (2) and a heat exchanger (3) for water heating are provided inside a casing (1), and a water supply passage (4) is provided at a water inlet of the heat exchanger (3). ) Is connected, and a tapping path (5) is extended from a discharge portion of the heat exchanger (3) to constitute an instantaneous water heater as an example of a water heater. A water faucet (6) serving as a water valve, a water flow control valve (7), and a water flow sensor (8) are provided in the water supply path (4). Further, a gas valve (10) and a fuel supply amount control valve (11) are interposed in a fuel supply path (9) to the burner (2). The faucet (6) is configured to be operated to open and close by a push operation of a push button (12) provided on the front surface of the casing (1). The water flow sensor (8) is, specifically, a water flow switch that is opened and closed when the water flow in the water supply channel (4) starts and stops, and is connected to the control device (13).
The water flow switch (8) is closed when the water faucet (6) is opened by the pressing operation of the push button (12) to generate a water flow, and the status signal is transmitted as a water flow signal to the control device (13). ), And is opened when the water faucet (6) is closed by the pressing operation of the push button (12) again, and the state signal is sent to the control device (13) as a non-water passing signal. It is configured to output. The control device (13) activates a spark plug (14) as ignition means provided near the burner (2) by input of a water flow signal from the water flow switch (8),
The gas valve (10) is opened to output a burner ignition control signal for supplying fuel to the burner (2). Further, it is configured to output a burner extinguishing control signal for shutting off the fuel supply to the burner (2) by closing the gas valve (10) in response to the input of the non-water flow signal from the water flow switch (8). I have. In addition, an output signal from a frame rod (15) attached near the burner (2) for detecting the disappearance is input to the control device (13). And the control device (13)
An output signal from the frame rod (15) is used to determine whether or not the extinction has occurred, and when it is determined that the extinction has occurred, a control signal for closing the gas valve (10) is output. On the other hand, in the circuit from the water flow switch (8) to the control device (13), a water discharge switch (16) for switching between a hot water discharge state and a water discharge state is interposed in series. When the water discharge switch (16) is opened, the circuit becomes non-conductive, and the state becomes the same as the state where the non-water flow signal is output from the water flow switch (8). That is, a water output signal corresponding to the non-water flow signal is input to the control device (13). Therefore, the control device (13) outputs a burner extinguishing control signal as in the case where the non-water-passing signal is input. As a result, the gas valve (10) is closed, and unheated water flows out of the heat exchanger (3) via the tap water path (5). When the water switch (16) is closed, the circuit becomes conductive, and the output signal from the water flow switch (8) is input to the control device (13). At this time, if the water is being discharged as described above, the water flow switch (8) is closed and the water flow signal is output. Therefore, by closing the water flow switch (16), the water flow switch (8) is closed. The water flow signal from 8) is input to the control device (13), and the control device (13) outputs a burner ignition control signal. Thereby, the gas valve (10) is opened, the spark plug (14) is operated, and the tapping is started again. That is, the flush switch (16) transmits an output signal from the water flow switch (8), which is a water flow sensor, to the control device (1).
The water discharge operation means (WM) is configured to switch between a state of inputting to the 3) and a state of inputting a water discharge signal corresponding to a non-water flow signal to the control device (13) in place of the output signal from the water flow switch (8). ing. Then, a water discharge switch (1) which is a water discharge operation means (WM)
By interposing 6) in a circuit from the water flow switch (8) to the control device (13), this control of igniting and extinguishing the burner (2) based on the output signal from the water flow switch (8). Using the function inherent in the device (13), in addition to the original hot water supply, water can be discharged,
It is possible to avoid adding a function to the control device (13) for flooding, and to reduce costs. As shown in FIG. 2, the above-mentioned water switch (16) is provided at the left moving end of the hot water temperature adjusting operation tool (18), which is slidable in the horizontal direction in the figure along the rail (17). It is configured to be opened by contact with the hot water temperature adjusting operation tool (18). The hot water temperature adjusting operation tool (18) has a pair of racks (18
a) and (18b) are attached, and the pair of rack portions (18a) and (18b) are a water amount adjusting gear (19) interlocked with the water amount adjusting valve (7) and a fuel supply amount adjusting valve. Each gear engages with the fuel supply adjusting gear (20) linked to (11). In other words, the hot water temperature adjusting operation tool (18) and the water amount adjusting valve (7)
Is a gear-type interlocking mechanism comprising a rack portion (18a) and a water amount adjusting gear (19), and the hot water temperature adjusting operation tool (18) and the fuel supply amount adjusting valve (11) are connected to the rack portion (18b). And a gear-type interlocking mechanism including a fuel supply adjusting gear (20). Then, by sliding this hot water temperature adjusting operation tool (18) to the right in the figure, hot water can be obtained.
By sliding the hot water temperature adjusting operation tool (18) to the left in the figure to obtain low-temperature hot water, the hot water temperature adjusting operation tool (18) is further slid to the left moving end. By contacting the flush switch (16), the flush switch (16) is opened to obtain water as described above. That is, a gas temperature adjusting operation tool (18) conventionally provided for hot water temperature adjustment is used, and the gas valve is operated by moving to a predetermined position (the moving end on the left side in FIG. 2 in this embodiment). By activating the water discharge switch (16), which is the water discharge operation means (WM) for closing the valve (10) to discharge water, the water discharge function can be obtained without specially providing new operation tools. I have to be able to. As shown in FIG. 3, on the front surface of the casing (1),
The above-mentioned hot water temperature adjusting operation tool (18) and the above-mentioned push button (12) are provided. After the push button (12) is pushed from the start position, which is the most protruding position, to the end position, which is the deepest position, when the hand is released, the push button (12) returns to the intermediate position between the start end and the end, and is held at that position, Further, when the self-holding state at the intermediate position is pushed again to the end position and then released, the self-return to the start position is realized. The operation by the push button (12) is performed as follows. (A) When the push button (12) is pushed from the start end position to the end position, the faucet (6) is mechanically interlocked to open the valve. As a result, the flow of water to the heat exchanger (3) is started and is detected by the water flow switch (8), so that the gas valve (10) is opened and the spark plug ( The operation of 14) is performed. (B) When the push button (12) returns from the end position to the intermediate position and is held at that position, the faucet (6) is maintained in the valve-open state. Therefore, the water flow signal is continuously output from the water flow switch (8), and the tapping operation is continued in the self-holding state at the intermediate position of the push button (12). In this state, by sliding the hot water temperature adjusting operation tool (18) left and right in the figure,
The tapping temperature can be changed. Then, by sliding the hot water temperature adjusting operation tool (18) to the left moving end, the water discharge switch (16) is opened as described above, and the combustion of the burner (2) is stopped to discharge water. Can be. Further, by sliding the hot water temperature adjusting operation tool (18) again from the left moving end to the right in the drawing, the water discharge switch (1) is operated.
6) is closed, the combustion of the burner (2) is started, and tapping is started again. That is, in the self-holding state at the intermediate position of the push button (12), the water discharging operation or the tapping operation at the desired temperature is continued. (C) Regardless of the operation state of the tapping operation or the tapping operation, the push button (12), which is held at the intermediate position, is pushed again to the end position to return to the start position by itself. Then, the faucet (6) is mechanically interlocked and the faucet (6) is closed. In the case of the water discharging operation, as described above, the gas valve (10) is closed with the opening of the water discharging switch (16), and the water is stopped by closing the water faucet (6). Also,
In the case of tapping operation, when the faucet (6) is closed, the flow of water to the heat exchanger (3) is stopped.
As a result, the valve closing operation of the gas valve (10) is performed and the tapping is stopped. [Another embodiment] Next, another embodiment of the present invention will be listed. <1> As the water flow sensor (8), an analog voltage is output according to the number of rotations of the turbine provided in the flow path, instead of the water flow switch that is opened and closed depending on the presence or absence of the water flow described in the previous embodiment. A device that detects the presence or absence of water flow without contacting a fluid, such as an ultrasonic type or an electromagnetic type, is used. Further, these water flow sensors (8) are provided in the hot water supply path (5) instead of being provided in the water supply path (4). <2> When a sensor whose output signal is obtained as an analog voltage as described above is used as the water flow sensor (8),
In the control device (13), when the voltage value is larger than a predetermined value, it is determined to be a water flow signal, and when the voltage value is smaller than the predetermined value, it is determined to be a non-water flow signal. In this case, as the water discharge operation means (WM), instead of the open / close switch (16) as described in the previous embodiment, the input source of the signal to the control device (13) is set based on the predetermined value. Switch to a water discharge circuit that outputs a small voltage and a water flow sensor,
Alternatively, a switch of a type that switches one end of a circuit from the water flow sensor to the control device to a state of grounding and a state of not grounding may be provided. <3> Whether the open / close switch (16) described in the previous embodiment or the switching type switch described in <2> above, the configuration of the switch is the same as that of the microswitch described in the previous embodiment. Besides, various types of switches such as a proximity switch and a photoelectric switch can be used. For example, in the case of the proximity switch, as shown in FIG. 4, a permanent magnet (21) is attached to a part of the hot water temperature adjusting operation tool (18) described in the previous embodiment, and the hot water temperature adjusting operation tool ( A reed switch (22) may be provided at a portion facing the permanent magnet (21) when the device (18) is operated to the water discharge position. In addition, in another embodiment of FIG. 4, the pair of rack portions (18a) and (18b) shown in FIG. 2 are integrated, and the integrated rack portion has a water adjusting amount. The gear (19) and the fuel supply amount adjusting gear (20) are in mesh with each other. <4> When the various switches (16) and (22) constituting the water discharge operation means (WM) are configured to be operated in conjunction with the operation of the hot water temperature adjusting operation tool (18), the interlocking operation is performed. The format can be changed as appropriate. FIGS. 5 and 6 show an embodiment in which the hot water temperature adjusting operation tool (18) is configured as a dial type instead of the slide type described in the previous embodiment. When a micro switch (16) is provided as shown in FIG. 5, a cam member (23) is attached to an operation gear (18c) connected to a hot water temperature adjusting operation tool (18) so as to be integrally rotatable. When the adjusting operation tool (18) is operated to the flood position, the cam member (2
The microswitch (16) may be provided so as to be operated by the contact of the operation unit (23a) of 3). When the reed switch (22) is provided as shown in FIG.
If a permanent magnet (21) is attached to a part of c) and a reed switch (22) is provided so as to be activated by the proximity of this permanent magnet (21) at the water discharge position of the hot water temperature adjusting operation tool (18) Good. In the other embodiment of FIGS. 5 and 6, the operating gear (18c), the water amount adjusting gear (19), and the fuel supply amount adjusting gear (20) constitute a gear type interlocking mechanism. Become. <5> The various switches (16) and (22) constituting the water discharge operation means (WM) are provided separately from the hot water temperature adjustment operation tool (18). <6> The type of the water heater is a tip stop type in which a faucet provided in the tapping pipe (5) is opened and closed by a cock provided near the tapping point at the tip of the tapping pipe (5). <7> In the case of the above configuration <6>, the water discharge operation means (W
M) Various switches described above (16), (22)
In a state that is operated in conjunction with a hot water temperature adjusting operation tool (18) built in a remote control device provided near a hot water outlet,
Alternatively, it is provided separately from the hot water temperature adjusting operation tool (18), or further provided on a shower head attached to the tip of the tapping pipe (5). Note that, in the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the structure of the attached drawings by the entry.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 show an embodiment of a water heater according to the present invention, FIG. 1 is a schematic configuration diagram of an instantaneous water heater, and FIG. FIG. 3 is a schematic view of the internal structure, and FIG. 4 to 6 are schematic views each showing another embodiment of the present invention and corresponding to FIG. (2) ... burner, (3) ... heat exchanger, (7) ... water flow control valve, (8) ... water flow sensor, (10) ... gas valve,
(11) ... fuel supply amount control valve, (13) ... control device,
(14) ... ignition means, (16) ... switch, (18) ...
(18a), (18b), (18c), (1
9), (20): gear-type interlocking mechanism, (22): switch, (WM): water discharge operation means.

Claims (1)

(57) [Rules for requesting registration of utility model] A heat exchanger (3) for water heating heated by the burner (2), a fuel supply amount control valve (11) for adjusting a fuel supply amount to the burner (2), and the burner (2) Ignition means (14) for igniting the heat exchanger (3)
A water flow control valve (7) for controlling the flow of water to the water, a hot water temperature control operation tool (18) for controlling the temperature of hot water from the heat exchanger (3), and the heat exchanger (3) A water flow sensor (8) for detecting the flow of water into the burner (2), and a control device (13) for controlling the combustion of the burner (2) by input of a water flow signal from the water flow sensor (8). In the hot water heater, a gas valve (10) for interrupting the supply of fuel to the burner (2) is provided, and the control device (13) receives the water flow signal from the water flow sensor (8) to input the water flow signal. The ignition means (14) is actuated and the gas valve (10) is opened to burn the burner (2), and the non-water flow signal from the water flow sensor (8) is input to the gas valve (10). ) Is closed, and
A water discharge operation means (WM) for inputting a water discharge signal for closing the gas valve (10) to the control device (13) regardless of an output signal from the water flow sensor (8) is provided. The means (WM) is configured to be operable by the hot water temperature adjusting operation tool (18), and the hot water temperature adjusting operation tool (1
8) Geared interlocking mechanisms (18a), (18b), (18c), (1
9) A water heater in which the water quantity control valve (7) and the fuel supply quantity control valve (11) are linked to each other via (20) and (20). 2. The water discharge operation means (WM) includes the water flow sensor (8).
Switch (1) interposed in the circuit from the controller to the control device (13)
6. The water heater according to claim 1, wherein the utility model registration is claim 6) or (22).