JP2009058172A - Hot water supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply device having a simple device constitution, minimizing manufacturing costs, and capable of properly forbidding an operation of a heating means according to generation status of problems such as defective combustion. <P>SOLUTION: This hot water supply device 1 has the heating means H and a control device 36 for controlling an operation of the heating means. The control device 36 has a failure detecting portion for detecting the failure of the heating means H, and can record the number of times of detected failures in a history recording portion while classifying the failures. The control device 36 forbids the operation of the heating means H when the number of times of failures recorded in the history recording portion reaches a predetermined set value. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water supply device, and more particularly to a device provided with a function for prohibiting operation based on the occurrence of problems such as defective combustion.

Conventionally, a hot water supply apparatus as disclosed in Patent Document 1 below has been provided. The hot water supply apparatus as disclosed in Patent Document 1 has a so-called interlock function that prohibits the operation of the heating means based on the occurrence of a failure such as a combustion failure in the heating means.
JP 2004-198051 A

  In the conventional hot water supply apparatus as described above, there has been a problem that measures such as providing a physical device and switches separately have to be taken in order to exhibit the interlock function. In addition, there is a problem that the configuration of the hot water supply apparatus becomes complicated and the manufacturing cost is high.

  Based on such knowledge, the present invention has a simple apparatus configuration, can suppress the manufacturing cost to the minimum, and can appropriately prohibit the operation of the heating means depending on the occurrence state of defects such as defective combustion. The purpose was to provide a water heater.

  The invention according to claim 1, which is provided based on the above-described problem, is a heating means for heating hot water with thermal energy generated by burning fuel, a control means for controlling the operation of the heating means, and the heating A failure detection means for detecting a failure of the means, and a history recording means for recording the number of times the failure of the heating means is detected by the failure detection means, the number of failures recorded in the history recording means being The hot water supply apparatus is characterized in that it is in an operation prohibited state in which the operation of the heating means is prohibited by the control means on condition that the predetermined number of times is reached.

  In the hot water supply apparatus of the present invention, the trouble detecting means detects the trouble of the heating means, and the number of times the trouble is detected is recorded in the history recording means, and the control means is provided on the condition that the number of trouble reaches a predetermined number. Thus, the operation of the heating means is prohibited. For this reason, the hot water supply apparatus of the present invention provides a hot water supply apparatus that can appropriately inhibit the operation of the heating means based on the occurrence state of defects such as defective combustion without separately providing a physical device or switches. it can.

  Here, it is assumed that the malfunction of the operation of the heating means is generally not single but multiple types. In addition, it is assumed that the timing suitable for prohibiting the operation of the heating means, that is, the number of occurrences of the malfunction, which is a condition for prohibiting the operation of the heating means, varies depending on the type of malfunction. Therefore, if the timing at which the operation of the heating unit should be prohibited is appropriately set according to the type of failure, it is assumed that the operation of the heating unit can be further appropriately prohibited.

  Therefore, in the invention according to claim 2 provided based on such knowledge, the defect detection unit can detect a plurality of types of defects, and the number of defects recorded in the history recording unit is the number of defects. The hot water supply device according to claim 1, wherein the hot water supply device is in an operation prohibited state on condition that the number of times set for each time is reached.

  In the hot water supply apparatus of the present invention, the heating means is in an operation-prohibited state on condition that the number of failures detected by the failure detection means reaches the number set for each type of failure. Therefore, in the hot water supply apparatus of the present invention, the operation of the heating means can be prohibited at an appropriate timing according to the type of failure.

  Here, in a water heater generally manufactured in recent years, for example, information on usage history such as operating time and the number of times of operation, and information on operation of the heating means such as information set after installation are recorded. This is used for controlling the heating means. Therefore, in the hot water supply apparatus according to each of the above claims, when the control means is to be replaced due to the occurrence of a malfunction, the control means newly prepared operation information recorded in the control means before replacement It is desirable to be able to use in On the other hand, the transfer of information about the prohibition of the operation of the heating means is recorded in the newly prepared control means, and the operation of the heating means is prohibited even if the control means is replaced. There's a problem.

  Therefore, the invention according to claim 3 provided on the basis of such knowledge has the operation information recording means for the control means to record the operation information related to the operation of the heating means including the operation prohibition information related to the operation prohibition of the heating means. Then, it is possible to perform an information transfer operation of reading the operation information recorded in the operation information recording unit of one control unit and writing the operation information to the operation information recording unit of the other control unit. One or both of reading out the operation prohibition information recorded on one control means side and writing the operation prohibition information to the operation information recording means of the other control means is prohibited. A hot water supply apparatus according to claim 1 or 2.

  In the hot water supply apparatus of the present invention, by performing the information transfer operation, the operation information recorded in the operation information recording unit of one control unit is written in the operation information recording unit of another control unit separately prepared, and this is heated. It can be used to control the means.

  Further, in the hot water supply apparatus of the present invention, in the information transfer operation, reading of information relating to the operation prohibition of the heating means recorded on one control means side is prohibited, or operation prohibition information is written on the other control means side. It is forbidden. Therefore, in the hot water supply apparatus of the present invention, the operation prohibition state of the heating means is canceled by performing the information transfer operation when the control means is exchanged, and the heating means becomes operable. Therefore, in the hot water supply apparatus of the present invention, it is possible to prevent the occurrence of the problem that the operation prohibition state of the heating means is not released even if the information transfer operation is performed when the control means is replaced.

  Here, in the hot water supply apparatus according to each of the inventions described above, when the heating means is in an operation-prohibited state, it can be easily released or unexpectedly released. Therefore, it cannot be said that there is no possibility that the use will continue without the necessary maintenance.

  Therefore, the invention according to claim 4 provided based on such knowledge has operation information recording means for the control means to record operation information relating to the operation of the heating means including operation inhibition information relating to the operation inhibition of the heating means. An operation terminal is connected to the control means, and the operation terminal has a hot water operation mode for hot water operation and a release operation mode provided separately from the hot water operation mode, The hot water supply device according to any one of claims 1 to 3, wherein the operation prohibition state can be canceled by switching the operation mode of the operation terminal to the release operation mode.

  In the hot water supply apparatus of the present invention, the operation terminal connected to the control means has not only the hot water operation mode for operation of the hot water operation, but also a release operation mode provided separately from the operation terminal. Only when switching is performed, the operation prohibition state can be canceled. That is, in the hot water supply apparatus of the present invention, the operation prohibited state is released after intentionally switching the operation mode of the operation terminal to the release operation mode. Therefore, according to the above-described configuration, the operation prohibition state can be easily released or unexpectedly released, and the heating means can be continuously used without performing the necessary maintenance. It is possible to provide a hot water supply apparatus that can prevent the above problem more reliably.

  Then, based on this knowledge, the hot water supply apparatus according to any one of claims 1 to 3 is an operation information record in which the control means records operation information relating to the operation of the heating means including operation inhibition information relating to the operation inhibition of the heating means. And an external information terminal can be connected to the control means, and the operation prohibition information recorded in the operation information recording means can be erased or rewritten only by the external information terminal. It is also possible to make it.

  In the hot water supply apparatus having such a configuration, the operation prohibition state is not released unless an external information terminal is connected to the control apparatus and the operation prohibition information is not erased or rewritten. Therefore, according to the hot water supply apparatus having the above-described configuration, it is possible to prevent the operation prohibition state from being easily released or to be released unexpectedly, and to continue to be used without performing the necessary maintenance on the heating means. Can be prevented more reliably.

  According to the present invention, it is possible to provide a hot water supply apparatus that has a simple apparatus configuration, can suppress the manufacturing cost to a minimum, and can appropriately prohibit the operation of the heating means in accordance with the occurrence of problems such as combustion failure. .

  Then, the hot water supply apparatus 1 concerning one Embodiment of this invention is demonstrated in detail, referring drawings. As shown in FIG. 1, a hot water supply device 1 is used to supply hot water to the heating means H for heating hot water, to the heating means H, or to supply hot water heated by the heating means H to the outside. It has a control system C for controlling the running water system L, a fuel system G for supplying fuel to the heating means H, and a heating means H. The heating means H is roughly divided into a heating unit 2, a heat exchange unit 3 that exchanges heat between the combustion gas generated in the heating unit 2 and a heat medium such as hot water, and an air supply unit 5 that supplies air to the heating unit 2. And an exhaust part 6 for discharging the combustion gas that has passed through the heat exchange part 3 to the outside.

  The heating unit 2 includes a burner 7 that functions as a combustion means and a combustion space 8. The burner 7 burns gas supplied from the outside, and a plurality of combustion tubes 9 are provided side by side. The burner 7 is attached with ignition means 7a and flame detection means 7b. The ignition means 7a is for igniting each combustion tube 9. The flame detection means 7 b detects the presence of flame in the burner 7. The burner 7 is connected to a fuel system G for supplying fuel.

  The fuel system G has a fuel supply pipe 10 connected to the burner 7, and an original gas solenoid valve 11, a gas proportional valve 12, and a hot water supply solenoid valve 14 are provided in the middle of the fuel system G. The original gas solenoid valve 11 and the gas proportional valve 12 are provided to adjust the amount of fuel supplied to the burner 7.

  The fuel supply pipe 10 is branched into two systems of fuel supply pipes 10a and 10b with a hot water supply gas electromagnetic valve 14 provided at a position downstream of the gas proportional valve 12 in the gas flow direction (burner 7 side) as a boundary. Yes. The burner 7 can adjust the combustion amount F by adjusting the opening of the gas proportional valve 12 and adjusting the fuel supply amount. The burner 7 can also change the combustion amount F stepwise by changing the radix of the combustion pipe 9 that performs the combustion operation. That is, the burner 7 can change the number of bases of the combustion pipe 9 to which gas is supplied stepwise by the hot water supply gas electromagnetic valve 14 provided in the middle of the fuel supply pipe 10.

  The combustion space portion 8 is a space through which high-temperature combustion gas generated by the combustion of fuel in the burner 7 flows. The heat exchanging unit 3 is provided at a position continuous with the combustion space 8 on the downstream side in the flow direction of the combustion gas. The heat exchange unit 3 includes a heat exchanger 15 that exchanges heat with the high-temperature combustion gas generated by the combustion operation of the burner 7. The heat exchanger 15 is a so-called fin-and-tube heat exchanger whose main part is made of copper. The heat exchanger 15 includes a heat receiving pipe 15a and fins 15b attached thereto. The heat receiving pipe 15 a has a water inlet 16 and a water outlet 17, and a running water circuit 18 forming a running water system L is connected to these.

  The flowing water circuit 18 is a flow path through which hot water (heat medium) flows, an inflow side flow path 20 for supplying hot water from the outside, and an outflow side flow path 21 for flowing out the hot water heated in the heat exchanger 15 to the outside. It has. In addition, the inflow side channel 20 and the outflow side channel 21 are bypassed by the bypass channel 31. The inflow side flow path 20 is connected to the water inlet 16 of the heat exchanger 15, and the outflow side flow path 21 is connected to the water outlet 17 of the heat exchanger 15.

  In the middle of the inflow side flow path 20, a water amount sensor 22 (water amount detecting means) and an incoming water thermistor 23 (incoming water temperature detecting means) are provided. The water amount sensor 22 detects the amount of hot water supplied through the inflow channel 20. The incoming water thermistor 23 detects the temperature of hot water supplied from the outside. Both the water quantity sensor 22 and the incoming water thermistor 23 are connected to a control device 36 described later.

  The outflow side channel 21 supplies high-temperature hot water heated by heat exchange with the combustion gas in the heat exchanger 15 to the heat load 25. Examples of the thermal load 25 include those using hot water itself such as a bathtub or a hot water tap, in addition to those using the thermal energy of hot water such as a heater represented by a fan convector. .

  A water amount adjusting valve 26 and a hot water thermistor 30 are provided in the middle of the outflow side channel 21 and at a position downstream of the bypass channel 31 in the hot water flow direction. The water amount adjustment valve 26 adjusts the flow rate of hot hot water flowing downstream from the water amount adjustment valve 26 by opening and closing the flow path of the outflow side flow path 21. The hot water thermistor 30 detects the temperature of hot water supplied to the thermal load 25 via the outflow side passage 21.

  The air supply unit 5 incorporates a fan 35 (air blowing means) inside, and can change the number of rotations according to the combustion state of the burner 7 to adjust the air volume and the air pressure. The fan 35 is connected to the control device 36, and the rotational speed of the fan 35 is controlled by adjusting the amount of power supplied by the control means C. The fan 35 can adjust the number of rotations in a plurality of stages. In addition, the air supply unit 5 can switch the rotation speed stage of the fan 35 at the start of operation (hereinafter also referred to as an initial rotation speed stage n).

  The exhaust part 6 is a part that exhausts the combustion gas that has passed through the heat exchange part 3. The exhaust unit 6 is provided with an exhaust temperature sensor 28 for detecting the exhaust temperature of the combustion gas and a CO sensor 29 for detecting the concentration of carbon monoxide contained in the exhausted combustion gas. .

  The control means C controls the operation of the hot water supply device 1 of the present embodiment, and includes a control device 36 and a remote controller 40 (operation terminal). The control device 36 has a large number of electrical / electronic components mounted on an electronic board. The control device 36 includes an operation control unit 50 that exhibits a function for controlling the operation of the heating unit H, a defect detection unit 51 (defect detection unit), an operation information recording unit 52 (operation information recording unit), and a history. A recording unit 53 (history recording means) and a communication connector 55 are provided. The remote controller 40 is used by a user to operate the hot water supply device 1 or set operating conditions of the hot water supply device 1. The remote controller 40 is connected to the control device 36 so as to be able to communicate by wire or wirelessly.

  Each of the sensors described above is electrically connected to the control device 36, and a detection signal transmitted from each sensor is input. Further, the control device 36 is configured to perform drive control of the water amount adjusting valve 26, the burner 7, the fan 35, and the like by the operation control unit 50 based on the detection signals received from the respective sensors.

  The operation controller 50 is necessary in the burner 7 based on the amount of hot water supplied to the heat load 25 (hot water supply amount) and the temperature of hot water to be supplied to the heat load 25 set by the remote controller 40 (hot water supply temperature). It is possible to derive the combustion amount F (required combustion amount). Further, the control device 36 has a combustion amount adjusting function for adjusting the number of combustion pipes 9 performing the combustion operation in the burner 7 and the combustion amount F so as to ensure the combustion amount F corresponding to the required combustion amount.

  The operation control unit 50 also has a function of controlling the operation of the heating unit H so as to perform an appropriate operation according to the type of the defect when the defect detection unit 51 described in detail later detects the defect of the heating unit H. I have. Specifically, when the time during which the temperature of the combustion gas exhausted from the exhaust unit 6 (hereinafter also simply referred to as exhaust gas) is a predetermined temperature is a predetermined time or more, it is determined that there is a problem, and the remote controller 40 An error message is displayed via, and a safe operation is performed. In this embodiment, if the time during which the temperature of the exhaust gas is 50 ° C. or higher continues for 10 seconds or longer, it is determined that there is a problem with the temperature of the exhaust gas. If a problem with the temperature of the exhaust gas occurs, the heating means 6 can be made operable by resetting an operation switch (not shown) provided in the remote controller 40 or the like. However, if this is repeated a predetermined number of times (255 times in the present embodiment), an interlock function, which will be described in detail later, acts, and the operation of the heating means H is prohibited.

When the carbon monoxide concentration contained in the exhaust gas satisfies any of the following (1) to (4), it is determined that the carbon monoxide concentration is defective, and a predetermined safe operation is performed. .
(1) A period in which the carbon monoxide concentration is equal to or higher than a predetermined concentration P (in this embodiment, 300 ppm or higher) is continuous for a predetermined time T1 (in this embodiment, 1 minute) or more, or integrated for a predetermined time T2 (in this embodiment) When it is 5 minutes or more in the form.
(2) A case where the integration of the carbon monoxide concentration is started from the time when the carbon monoxide concentration becomes equal to or higher than the predetermined concentration Q (300 ppm in the present embodiment), and the integrated value R becomes a certain value or more.
(3) The case where the period during which the carbon monoxide concentration is equal to or higher than the predetermined concentration S (1100 ppm in the present embodiment) is equal to or longer than the predetermined time T3 (20 seconds in the present embodiment).
(4) When the integration of the carbon monoxide concentration is started from the time when the carbon monoxide concentration becomes equal to or higher than the predetermined concentration U (3000 ppm in the present embodiment), and the integrated value V becomes a certain value or more.

  When a problem with the concentration of carbon monoxide contained in the exhaust gas occurs, a predetermined safe operation is performed. At this time, while the number of occurrences of defects related to the carbon monoxide concentration within a predetermined period has not reached the predetermined number (three in the present embodiment), resetting is performed using an operation switch (not shown) or the like. The heating means 6 can be made operable. On the other hand, when the number of occurrences of defects related to the carbon monoxide concentration reaches a predetermined number (three times), an interlock function, which will be described in detail later, acts, and the operation of the heating means H is prohibited.

  When it is detected that the combustion state in the burner 7 is abnormal, the combustion operation is performed in the heating means H in a state where the rotation speed of the fan 35 provided in the air supply unit 5 is increased by one stage. In this way, the number of times that the operation of increasing the rotation speed of the fan 35 is performed is counted (count 1 per number of combustion times), and if this exceeds a predetermined number of times, the operation is started. The setting is changed so that the combustion operation is performed in a state where the rotational speed of the fan 35, that is, the initial rotational speed stage n is increased by one stage. When the initial rotational speed stage n of the fan 35 exceeds the predetermined number of stages (eight stages in this embodiment), the interlock function described later is activated and the operation of the heating means H is prohibited. It becomes a state. When the stage where the interlock function is activated is reached, it is determined whether the hot water supply device 1 has reached the end of its life based on the energization time of the hot water supply device 1, the number of combustion operations of the heating means H, and the combustion operation time. The result is displayed via the remote controller 40 or the like.

  The defect detection unit 51 detects a defect that has occurred in the heating means H based on detection signals transmitted from the sensors connected to the control device 36. Specifically, the malfunction detection unit 51 detects an abnormality in the temperature of the exhaust gas (hereinafter referred to as “exhaust gas temperature”) based on data detected by the exhaust temperature sensor 28, the CO sensor 29, and the flame detection unit 7 b installed in the exhaust unit 6. Detects abnormalities in exhaust gas temperature), abnormal carbon monoxide concentration in exhaust gas (hereinafter also referred to as abnormal CO concentration), and abnormal combustion state in burner 7 (hereinafter also referred to as abnormal combustion) can do.

  The operation information recording unit 52 and the history recording unit 53 are configured by a memory mounted on the control device 36. In the present embodiment, the operation information recording unit 52 and the history recording unit 53 are formed by an EEPROM. Information on the operating state of the heating means H (hereinafter also referred to as operation information) is recorded in the operation information recording unit 52. Specifically, in the operation information recording unit 52, data reflecting the installation conditions of the hot water supply device 1 (hereinafter also referred to as installation condition data) and data relating to the operation history of the hot water supply device 1 (hereinafter also referred to as operation history data). ), Data relating to the operating conditions of the hot water supply device 1 (hereinafter also referred to as condition data) are recorded. The history recording unit 53 includes data indicating a failure occurrence history (hereinafter also referred to as failure history data) and data indicating whether or not the heating means H is in an operation prohibited state (hereinafter also referred to as operation prohibition data). To be recorded.

  The installation condition data described above includes data such as gas pressure regulation data set based on the pressure of the gas supplied to the burner 7 via the fuel supply pipe 10, for example. Further, the operation history data includes data such as the energization time to the hot water supply device 1, the accumulated operation time of the heating means H, and the number of operations of the heating means H. The condition data is set by the user via the remote controller 40 or the like, and data such as the set temperature of the heating device functioning as the heat load 25, the dropping temperature into the bathtub, and the amount of hot water dropped into the bathtub are stored. included.

  The trouble history data is data in which the number of occurrences of the trouble is recorded for each kind of trouble assumed in the hot water supply apparatus 1. Specifically, the defect history data includes the number of detections of exhaust gas temperature abnormality (hereinafter also referred to as exhaust gas temperature abnormality number Et), the number of detection of CO concentration abnormality (hereinafter also referred to as CO concentration abnormality number Ec), combustion. The number of times of detecting an abnormality (hereinafter also referred to as the number of times of abnormal combustion Eb) is recorded separately. The operation prohibition data is data indicating whether or not the heating means H is in an operation prohibition state. When the operation prohibition data is on, the heating means H is in an operation prohibition state, and when it is off, the heating means H is in an operable state.

  The communication connector 55 is a connector for connecting the control device 36 separately prepared for replacement and the control device 36 so that communication is possible. When the control device 36 attached to the hot water supply device 1 and the separately prepared control device 36 are connected via the communication connector 55, it becomes possible to exchange necessary data between them.

  In addition to the above-described functions, the control device 36 employed in the present embodiment counts the number of times that a failure has been detected by the failure detection unit 51 for each type of failure, and when this reaches a predetermined number of times, heating means It also has an interlock function that disables H. Hereinafter, the operation until the control device 36 performs the interlock function will be described in detail with reference to the flowchart shown in FIG.

  As shown in FIG. 3, the control device 36 first confirms in step 1 whether or not a failure has occurred in the heating means H by the failure detection unit 51. Here, when the occurrence of a defect is confirmed, the control flow proceeds to step 2 and the defect history data recorded in the history recording unit 53 is updated.

  Specifically, as described above, the history recording unit 53 records the number of occurrences of defects classified for each defect. That is, the exhaust gas temperature abnormality number Et, the CO concentration abnormality number Ec, and the combustion abnormality number Eb are individually recorded. In Step 2, the number of data corresponding to the defect detected in Step 1 is increased by one.

  As described above, when the exhaust gas temperature abnormality number Et, the CO concentration abnormality number Ec, and the combustion abnormality number Eb data are updated in Step 2, the control flow proceeds to Step 3, and the number of occurrences Et, It is confirmed whether or not Ec and Eb are greater than or equal to preset values St, Sc and Sb set in advance for each defect. Here, when the number of occurrences Et, Ec, and Eb of each defect is less than the set values St, Sc, and Sb (Et <St, Ec <Sc, Eb <Sb), the heating unit H is in an operation-inhibited state. Instead, the control flow is returned to step 1.

  On the other hand, if at least one of the occurrence times Et, Ec, and Eb of the respective defects has reached the set values St, Sc, and Sb in Step 3 (Et = St, Ec = Sc, Eb = Sb), the control flow is The process proceeds to step 4 where the heating means H is disabled. Thereby, a series of control flow is completed.

  In the hot water supply apparatus 1 of the present embodiment, when the interlock function is activated as described above and the heating means H is in the operation prohibited state, the main power supply (not shown) is turned on and off, and the power switch provided on the remote controller 40 is turned on and off. Even if you do it, you cannot release the operation prohibited state. In order to cancel the operation prohibition state in the hot water supply apparatus 1, a mode (hot water supply operation mode) in which the remote controller 40 connected to the control device 36 by wire or wirelessly is provided for operation of the normal hot water supply operation of the hot water supply apparatus 1. The operation prohibition data recorded in the operation information recording unit 52 must be updated to the off state by switching to an operation mode (cancellation operation mode) for releasing the operation prohibition state provided separately and performing a predetermined operation. Don't be.

  The hot water supply device 1 of the present embodiment can be replaced with a replacement control device 36 that is prepared separately. In addition, when the control device 36 is replaced, both the new and old control devices 36 and 36 are connected via the communication connector 55, so that the control device attached to the hot water supply device 1 to be replaced is connected. Among the data recorded in the operation information recording unit 52 on the 36 (hereinafter also referred to as the old control device 36) side, the necessary data of the control device 36 (hereinafter also referred to as the new control device 36) prepared for replacement is exchanged. An information transfer operation for transferring to the operation information recording unit 52 can be performed.

  More specifically, in the hot water supply apparatus 1 of the present embodiment, the operation information recorded in the operation information recording unit 52, that is, the installation condition data regarding the installation conditions of the hot water supply apparatus 1, and the operation history regarding the operation history of the hot water supply apparatus 1. The data and the condition data regarding the operating conditions of the hot water supply device 1 need not be changed even if the control device 36 is replaced. Moreover, if these data are handed over from the old control device 36 side to the new control device 36 side, the operation of the hot water supply device 1 can be stabilized even immediately after the replacement of the control device 36. Therefore, in the hot water supply device 1, when the new and old control devices 36 and 36 are connected so as to communicate with each other, the installation condition data, the operation history data, and the condition data are stored in the operation information recording unit 52 on the new control device 36 side. Can write. On the other hand, the failure history data indicating the occurrence history of the failure and the operation prohibition data indicating whether or not the heating means H is in the operation prohibited state are not transferred to the new control device 36 side.

  As described above, in the hot water supply apparatus 1 of the present embodiment, the occurrence times Et, Ec, and Eb of the respective faults detected by the fault detection unit 51 as the faults of the heating unit H are recorded in the history recording unit 53. Then, when the number of times of at least one of a plurality of failures reaches preset values St, Sc, Sb, the heating means H is disabled, and the power switch of the main power supply or the remote control 40 is turned off. Even if is turned on / off, the heating means H cannot be operated. Therefore, the hot water supply device 1 can prohibit the operation of the heating means H at an appropriate timing based on the occurrence state of a failure such as a combustion failure.

  Further, as described above, the hot water supply device 1 can exhibit the interlock function without separately providing a physical device or switches. Therefore, the hot water supply device 1 has a simple device configuration and can be manufactured at low cost.

  The hot water supply apparatus 1 according to the present embodiment can separately set the set values St, Sc, and Sb that serve as a reference for setting the heating unit H in an operation-prohibited state. Therefore, the hot water supply device 1 can set the set values St, Sc, and Sb as appropriate for each type of failure, thereby disabling the heating unit H at a timing suitable for the type of failure.

  When the control device 36 is replaced, the hot water supply device 1 of the present embodiment is recorded in the operation information recording unit 52 on the old control device 36 side by connecting the new and old control devices 36 so that they can communicate and performing an information transfer operation. Can be transferred to the new control device 36 and recorded. Therefore, the hot water supply device 1 can control the operation of the heating means H based on the data set in the old control device 36 even if the control device 36 is replaced for maintenance.

  As described above, the hot water supply device 1 switches the remote controller 40 connected to the control device 36 to the release operation mode for releasing the operation inhibition state provided separately from the hot water supply operation mode provided for the operation of the hot water supply operation. If the above operation is not performed, the operation prohibition data is turned off and the operation prohibition state cannot be released. Therefore, in the hot water supply device 1, the operation prohibition state is not easily canceled or unexpectedly released, and there is a problem that the use is continued without performing the maintenance necessary for the heating means H. Absent.

  In the above-described embodiment, a configuration in which a release operation mode is provided as an operation mode of the remote controller 40 for releasing the operation prohibition state is illustrated. However, the present invention is not limited to this, and for example, with the hot water supply device 1 Alternatively, devices such as maintenance information terminals and operation terminals prepared separately can be connected to the control device 36, and the operation prohibition state of the heating means H cannot be canceled unless the information terminals are used. Even with such a configuration, the operation prohibition state is not easily canceled or unexpectedly released, and there is a problem that the use is continued without performing the maintenance necessary for the heating means H. Does not occur. As the above-described information terminal or the like, an appropriate one such as a conventionally known personal computer, ROM writer, or PLC can be adopted.

  In the above embodiment, the exhaust gas temperature abnormality, the CO concentration abnormality, and the combustion abnormality are exemplified as the types of malfunctions that can be detected by the malfunction detection unit 51. However, the present invention is not limited to this, and for example, the air supply unit 5 It is possible to detect various problems such as malfunction of the fan 35 provided in the water and the temperature of the hot water discharged from the water outlet 17 (hot water supply temperature), and the above description is based on the detection result. Similarly, a configuration for controlling the operation of the heating means H may be adopted.

  In the above embodiment, the transfer of the failure history data and the operation prohibition data recorded in the operation information recording unit 52 at the time of replacement of the control device 36 is prohibited, so that these data are the operations on the new control device 36 side for replacement. The information recording unit 52 is provided with a function of preventing writing, but the present invention is not limited to this and may not have such a function. Even in the case of such a configuration, the hot water supply device 1 can be used by deleting or changing the failure history data and the operation prohibition data with the remote controller 40 or the like after replacement with the new control device 36.

  In addition, instead of prohibiting the transfer of the failure history data and the operation prohibition data as described above, the hot water supply device 1 permits the transfer of the failure history data and the operation prohibition data from the old control device 36 side. It is also possible to adopt a configuration in which writing of data to the new control device 36 side is prohibited.

  The hot water supply apparatus 1 shown in the above embodiment includes the heating means H that performs a combustion operation using gas as fuel. However, the present invention is not limited to this, and is a type of burning liquid fuel. It may be a thing.

It is an operation principle figure of the hot water supply device concerning one embodiment of the present invention. It is a block diagram which shows the structure of a control means. It is a flowchart which shows operation | movement of the hot water supply apparatus shown in FIG.

Explanation of symbols

1 Hot-water supply device 36 Control device 40 Remote control (operation terminal)
51 Defect detection unit (defect detection means)
52 motion information recording unit (motion information recording means)
53 History recording unit (history recording means)
H Heating means C Control means

Claims (4)

Heating means for heating hot and cold water by heat energy generated by burning fuel;
Control means for controlling the operation of the heating means;
A failure detection means for detecting a failure of the heating means;
A history recording means for recording the number of times the trouble of the heating means is detected by the trouble detecting means;
A hot water supply apparatus, wherein the operation unit is in an operation prohibited state in which the operation of the heating unit is prohibited by the control unit on the condition that the number of failures recorded in the history recording unit reaches a predetermined number. The defect detection means can detect multiple types of defects,
2. The hot water supply apparatus according to claim 1, wherein the operation is prohibited on condition that the number of failures recorded in the history recording means reaches a number set for each failure. The control means has operation information recording means for recording operation information related to the operation of the heating means including operation prohibition information relating to the operation prohibition of the heating means,
It is possible to perform an information transfer operation that reads the operation information recorded in the operation information recording unit of one control unit and writes the operation information to the operation information recording unit of the other control unit,
During the information transfer operation, one or both of reading out the operation prohibition information recorded on the one control means side and writing the operation prohibition information into the operation information recording means of the other control means is prohibited. The hot water supply apparatus according to claim 1 or 2, wherein The control means has operation information recording means for recording operation information related to the operation of the heating means including operation prohibition information relating to the operation prohibition of the heating means,
An operation terminal is connected to the control means,
The operation terminal has a hot water operation mode for operating a hot water operation and a release operation mode provided separately from the hot water operation mode,
The hot water supply device according to any one of claims 1 to 3, wherein the operation prohibition state can be canceled by switching the operation mode of the operation terminal to a release operation mode.

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