JP3692864B2 - Failure diagnosis support device for water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
More particularly, the present invention relates to an apparatus connected to a hot water supply device, and displays a failure diagnosis procedure for the hot water supply device interactively in accordance with a predetermined failure diagnosis sequence. The present invention also relates to an apparatus for instructing a hot water supply device to perform an operation necessary for failure diagnosis and performing a failure diagnosis of the hot water supply device based on information obtained from the outside.
[0002]
[Prior art]
Conventionally, periodic inspection and failure diagnosis (hereinafter referred to as failure diagnosis, etc.) of a hot water supply apparatus are performed manually by an operator at the construction site of the hot water supply apparatus. Such failure diagnosis is performed based on a predetermined maintenance manual for each hot water supply device, but recently, the maintenance manual used for failure diagnosis etc. tends to be diversified because the structure of the hot water supply device is complicated and sophisticated. In connection with this, there has been a problem that time and labor are required for on-site failure diagnosis and the like.
[0003]
With regard to this point, recent hot water supply apparatuses are provided with an error display function in the control unit so that the site where the failure has occurred can be quickly and accurately grasped. In this case, the control unit of the hot water supply device monitors the operation status of each part of the hot water supply device during operation of the hot water supply device with a sensor or the like, and when an abnormal operation or failure of the hot water supply device is detected, the status is displayed in a predetermined manner. It is configured to display according to the mode (self-diagnostic function), thereby reducing the burden on the worker for specifying the part where the failure has occurred.
[0004]
[Problems to be solved by the invention]
However, even in a hot water supply device equipped with such a self-diagnosis function, there are many aspects that require the operator to accurately identify the faulty part and confirm the occurrence of the fault, and the worker is still forced to use the maintenance manual. In addition, it has been required to practice complicated fault diagnosis procedures associated therewith.
[0005]
Therefore, recently, failure diagnosis procedures for hot water supply devices are displayed in a so-called interactive format, and the operator can easily identify the location of failure and confirm the occurrence of failure by operating the hot water supply device etc. according to such display. Diagnosis support devices have been proposed.
[0006]
It is an object of the present invention to provide an application technique in such a failure diagnosis support device, and more specifically, a failure that can easily diagnose an abnormality of an ignition system of a hot water supply device, an abnormality of a temperature sensor arranged in a circulation path, or the like. It is to provide a diagnosis support apparatus.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a failure diagnosis support apparatus for a hot water supply apparatus according to claim 1 of the present invention displays a failure diagnosis procedure for a hot water supply apparatus in an interactive manner according to a predetermined failure diagnosis sequence stored in a storage means. In the failure diagnosis support apparatus configured to perform a failure diagnosis based on information obtained from the outside while the failure diagnosis means instructs the hot water supply device to perform an operation necessary for the failure diagnosis while displaying on the means, the failure diagnosis The display means requests the sequencer to output a predetermined ignition command signal to the hot water supply device, and to make the display means check the presence or absence of an ignition operation corresponding to the ignition command signal by operating sound of the ignition device. When the first step to be displayed on the screen and the confirmation result input corresponding to the first step are affirmative, A second step of displaying on the display means an instruction to fix the high-pressure cord connected to the spark plug to the can body of the hot water supply device, and an input of work completion corresponding to the second step And outputting an ignition command signal again, and a third step of displaying a discharge status input request from the high voltage cord at that time on the display means, and inputting the discharge status in the third step The indication of the request includes a first selection branch indicating no discharge from the high-voltage cord, a second selection branch indicating discharge from the middle of the high-voltage cord, and a discharge from the tip of the high-voltage cord. The third selection branch is displayed, and when the first selection branch is selected, it is determined that the ignition device is abnormal. When the second selection branch is selected, the high pressure is selected. Abnormal code And, wherein the determining if the third choices are selected as abnormality of the ignition plug.
[0008]
That is, in the failure diagnosis support apparatus according to the first aspect, a diagnostic procedure or the like is displayed on the display unit based on the stored failure diagnosis sequence, and a predetermined number of times is given to the hot water supply device based on the failure diagnosis sequence. An operation command is given. Specifically, a predetermined ignition command signal is transmitted to the hot water supply device based on the failure diagnosis sequence. Then, the operation information (that is, information indicating the ignition state) of the hot water supply apparatus with respect to this ignition command signal is given to the failure diagnosis means from the outside through communication with the hot water supply apparatus or an operator's input operation. Failure diagnosis of the hot water supply apparatus (diagnosis of ignition operation abnormality) based on these information is performed. Therefore, according to the first aspect of the invention, the operator simply inputs necessary information while looking at the display on the display means (in other words, a form that interacts with the failure diagnosis support apparatus). ) Failure diagnosis of the hot water supply device can be performed.
[0009]
According to a second aspect of the present invention, there is provided a failure diagnosis support apparatus for a hot water supply apparatus, in which a failure diagnosis procedure for a hot water supply apparatus is displayed on the display means in an interactive manner in accordance with a predetermined failure diagnosis sequence stored in the storage means. In the failure diagnosis support apparatus configured to perform a failure diagnosis based on information obtained from the outside while the failure diagnosis means instructs the hot water supply apparatus to perform an operation necessary for the failure diagnosis, the failure diagnosis sequence includes the hot water supply An operation command for shutting off the flow of water from the device to the terminal heating device is received, and the hot water connected to the expansion tank and pump from the heat exchanger of the hot water supply device without passing through the terminal heating device is output. A first step for configuring a circulation path, and a second step for displaying on the display means an instruction to insert a temperature sensor that serves as a reference for failure diagnosis into the expansion tank. And waiting for the input of the completion of the operation corresponding to the second step, sending an operation command for performing a hot water supply operation at a predetermined set temperature to the hot water supply device for a certain period of time to the circulation path. After the third step of circulating hot water and the stop of the hot water supply operation, the detection value of the temperature sensor arranged in the circulation path and the detection value of the reference temperature sensor are obtained and compared. And it has the 4th step which performs failure diagnosis of the temperature sensor arranged in the above-mentioned circulation path.
In the second aspect of the present invention, first, an operation command for causing the hot water supply device to perform an operation in a predetermined mode set in advance is transmitted. This operation command includes a command to close a valve in the circulation path when the hot water circulation circuit is complicated due to connection of a terminal heating device or the like, and to configure a desired circulation path. Operation commands for creating an environment necessary for failure diagnosis, such as a command for requesting hot water supply at a predetermined temperature. And by operating the hot water supply device in such an environment, by comparing the detection value of the temperature sensor arranged in the circulation path with the expected sensor value that is expected to be detected by the temperature sensor in such an environment, An abnormal operation of the temperature sensor itself is diagnosed. Accordingly, even in this case, the operator can perform a failure diagnosis of the temperature sensor in a so-called interactive form by proceeding while confirming such a series of operations on the display of the display means.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a failure diagnosis support apparatus for a hot water supply apparatus according to the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 shows a schematic configuration of a failure diagnosis support device 1 according to the present invention and a connection state when the failure diagnosis support device 1 is connected to a hot water supply device 2. In the case shown in the figure, an interface device 3 for data communication between the failure diagnosis support device 1 and the hot water supply device 2 is interposed therebetween, and the devices are connected by a communication cable L.
[0012]
The failure diagnosis support device 1 is a device for performing a failure diagnosis of the hot water supply device 2 in an interactive manner with a worker, and based on the storage means 11 storing a predetermined failure diagnosis sequence and the failure diagnosis sequence. A display unit 12 that displays a failure diagnosis procedure and the like, and outputs a predetermined operation command to the hot water supply device 2 based on the failure diagnosis sequence, and performs a failure diagnosis of the hot water supply device based on information input from the outside. The failure diagnosis means 13 is provided as a main part.
[0013]
Specifically, a portable computer (so-called notebook personal computer) is preferably employed as the failure diagnosis support apparatus 1. That is, in the present embodiment, a storage device of the computer (for example, a built-in hard disk device or a built-in MO disk device) is used as the storage unit 11, and a display device of the computer is used as the display unit 12. Used. Further, as the failure diagnosing means 13, an arithmetic unit of the computer (specifically, a central processing unit that performs arithmetic processing based on a program or the like stored in the storage device) is used.
[0014]
As a means for inputting information to the failure diagnosis means 13, a keyboard device (or a display device capable of so-called pen touch input) 14 of the computer is used, an operation command transmission means for the hot water supply device 2, and the hot water supply device 2. A data communication device (for example, a built-in communication modem) 15 is used as an input means for data transmitted from the.
[0015]
The failure diagnosis sequence is stored in the storage means 11 in the form of a program. Based on this program, transmission of an operation command to be described later, display on the display means 12, and further failure diagnosis by the failure diagnosis means 13 Is done. Of course, the storage means 11 also stores predetermined data necessary for executing the failure diagnosis sequence.
[0016]
In addition, as the failure diagnosis sequence described above, the failure of multiple types of hot water supply devices with different models and configurations (for example, the type of hot water supply device, the presence / absence of connection of various terminal devices, and the presence / absence of a bath drop circuit) A plurality of types of failure diagnosis sequences are stored in advance in the storage means 11 so as to support diagnosis. Prior to failure diagnosis, which will be described later, a failure diagnosis sequence corresponding to a model or the like that performs failure diagnosis can be selected from these sequences.
[0017]
The hot water supply device 2 is a hot water supply device having a known configuration, and in the present embodiment, includes at least a control unit 21 as shown in FIG. The controller 21 is a controller that controls the operation of the hot water supply device 2 as a whole and monitors the operation status, and is equipped with a microcomputer. Sensors (not shown) provided in each part of the hot water supply device 2 are provided. ) To obtain various information (for example, water temperature, water amount, presence / absence of combustion, data from terminal equipment, etc.) from these sensors and the like, and the above-described control is performed.
[0018]
Moreover, this control part 21 is electrically connected with the control part (not shown) of various terminal devices (for example, a terminal heating apparatus, a solar connection unit, etc.) connected to the hot-water supply apparatus 1 in connection with the monitoring of the said operating condition. The operation status information is obtained from these terminal devices, and the operation status of the hot water supply device 2 is monitored, and when a failure or the like is detected, a predetermined alarm can be notified.
[0019]
Further, the control unit 21 includes a data communication unit (not shown) capable of communicating with the data communication device 15 of the failure diagnosis support device 1 via the interface device 3. In addition, this data communication part can be used also as the data communication part for the hot water supply apparatus 2 to communicate with the remote controller (not shown).
[0020]
On the other hand, the interface device 3 is a device that functions as an interface for data communication between the failure diagnosis support device 1 and the hot water supply device 2. In this embodiment, the interface device 3 includes a data communication unit 31 and a measurement unit. 32 as a main part.
[0021]
Specifically, the data communication unit 31 transmits the operation command transmitted from the failure diagnosis support device 1 to the control unit 21 of the hot water supply device 2 and detects the sensors and the like transmitted from the hot water supply device 2. A function of transmitting value data or the like to the failure diagnosis support apparatus 1 is provided. The measuring unit 32 is implemented by mounting various measuring devices such as a circuit meter, a thermometer, a gas pressure gauge, etc., and converts the analog data detected by these measuring devices into digital data to support the above-described failure diagnosis. Transmission to the apparatus 1 is enabled. In the figure, reference numeral 33 denotes a test bar of the circuit meter, and reference numeral 34 denotes a temperature sensor (thermistor) for temperature detection in the thermometer. Furthermore, the code | symbol 35 has shown piping for the gas pressure measurement connected to the said gas pressure gauge.
[0022]
Therefore, in the failure diagnosis support apparatus 1 of the present invention, the diagnosis of the failure part of the hot water supply apparatus 2 connected in this way is performed as follows. In the following description, the operation of the failure diagnosis support device 1 and the hot water supply device 2 will be described for each diagnosis part. Prior to these failure diagnosis operations, the worker who performs the failure diagnosis is the failure diagnosis support device. In addition to selecting a failure diagnosis sequence corresponding to the hot water supply device 2 that makes a diagnosis according to the display of one display means 12, a failure diagnosis sequence corresponding to each diagnosis portion is selected by selecting a part to be diagnosed in the same manner. Let it run.
[0023]
A. Diagnosis of Ignition System First, failure diagnosis of the ignition system of the hot water supply apparatus will be described with reference to FIGS. FIG. 2 is a flowchart showing an example of a procedure for diagnosing a failure in the ignition system, and FIG. 3 shows a schematic configuration of the ignition device 4 to be diagnosed. As shown in FIG. 3, the ignition device 4 is electrically connected to the control unit 21 of the hot water supply device 2 and is connected to a spark plug 42 via a high-voltage cord 41. It is attached to a predetermined part (not shown) of the device 2.
[0024]
In this failure diagnosis of the ignition device 4, when diagnosis is started, first, as shown in step S <b> 1 of FIG. 2, an ignition operation is instructed to the ignition device 4 by communication via the communication cable L from the failure diagnosis support device 1. An operation command (ignition command signal) is transmitted. At that time, a display requesting that the presence or absence of the ignition operation is confirmed by the operation sound of the ignition device 4 is displayed on the display means 12.
[0025]
The worker listens and determines whether or not there is an operating sound of the ignition device 4 in accordance with this display, and inputs the result to the failure diagnosis support apparatus 1 via the input means 14 (see step S2 in FIG. 2).
[0026]
Here, when there is no operation sound of the ignition device 4 (that is, when the ignition device 4 is not operating normally and the determination in step S2 of FIG. 2 is negative), the abnormality of the ignition device 4 itself or the control unit In this case, the failure diagnosis unit 13 first proceeds to step S3 in FIG. 2 to display on the display unit 12 a request for voltage confirmation from the control unit 21 (controller).
[0027]
When such a display is made, the operator measures the voltage input from the control unit 21 to the ignition device 4 using the test bar 33 connected to the measuring instrument unit 32 of the interface device 3 based on this display. I do. The measurement result is input to the failure diagnosis unit 13 of the failure diagnosis support apparatus 1 via the communication cable, and the failure diagnosis unit 13 stores data indicating whether or not the input voltage indicates a predetermined voltage value. In comparison, it is determined whether or not the output voltage of the control unit 21 is normal. Although not shown in FIG. 2, when this voltage is abnormal, it is determined that the control unit 21 itself is abnormal or communication with the control unit 21 is abnormal. A diagnosis sequence for performing diagnosis is executed, and thereby, a fault location is specified.
[0028]
Next, when the operation sound can be heard (or when the voltage of the control unit 21 is normal), the process proceeds to step S4 in FIG. 2, and the failure diagnosis support apparatus 1 transmits the ignition command signal. It stops and the ignition device 4 is turned off.
[0029]
Then, when the ignition device 4 is turned off, the ignition plug 42 is subsequently removed from the ignition device 4 (specifically, the high-voltage cord 41) and the high-voltage cord 41 connected to the ignition plug 42 is displayed on the display means 12. Is displayed on the can (not shown) of the hot water supply device 2 (see step S5 in FIG. 2).
[0030]
Then, based on this display, when the worker completes the work of removing the spark plug 42 and fixing the high voltage cord 41 to the can body and inputs the work completion to the fault diagnosis support apparatus 1, the fault diagnosis support The device 1 transmits an ignition command signal to the hot water supply device 2 again to turn on the ignition device 4 (see step S6 in FIG. 2).
[0031]
At that time, a display requesting input of the visual determination result of the discharge state is made on the display means 12. Specifically, whether the discharge to the can is discharged from the tip of the high-voltage cord 42 (see step S7 in FIG. 2), or is discharged from the middle of the high-voltage cord 42 (see step S8 in FIG. 2). Further, three displays asking whether or not there is any discharge (see step S8 in FIG. 2) are made, and the operator selects and inputs the result of visual judgment according to the display.
[0032]
If it is inputted by this input that the tip of the high voltage cord 41 is discharged, the failure diagnosis means 13 judges that there is no abnormality in the ignition device 4 and the high voltage cord 41 and decides that the ignition plug 42 is abnormal. Then, a screen requesting confirmation of the shape and the like of the plug 42 is displayed (see step S9 in FIG. 2). If it is input that the high-voltage cord 41 is discharged from the middle, it can be determined that the high-voltage cord 41 is disconnected or the coating of the cord is broken. In this case, the high-voltage cord 41 is indicated as defective ( (See step S10 in FIG. 2). Further, when no discharge is observed, it is determined that the ignition device 4 itself is abnormal, and that effect is displayed on the display means 12 (see step S11 in FIG. 2).
[0033]
In this way, by diagnosing the ignition system of the hot water supply device 2 using the failure diagnosis support apparatus 1 of the present invention, the operator looks at the display on the display means 12, in other words, as if the failure diagnosis support apparatus 1. It is possible to search for a failure of the ignition system by interacting with the engine, and to identify the failure point without using a maintenance manual or the like. In addition, since the determination based on the presence or absence of the operation sound of the ignition device 4 is performed as a primary diagnosis of the ignition device 4, it is extremely simple when the diagnosis can be completed only by confirming the operation sound such as a normal periodic inspection. Thus, it is possible to provide a method for a simple inspection (in this case, it is needless to say that the failure diagnosis sequence is configured to be terminated by the determination in step S2 in FIG. 2).
[0034]
For the diagnosis of the ignition system, in addition to the above-described failure diagnosis sequence, for example, flame detection (not shown) installed in the combustion section (not shown) of the hot water supply device 2 using a sequence as shown in FIG. It is also possible to detect abnormality of the device (frame rod).
[0035]
That is, the flame rod is inserted into the burning burner flame, and detects the presence or absence of flame by applying a voltage between the burner and whether or not the current is applied. It is empirically known that when a ground wire between the (controller) 21 is disconnected, a flame that should not be detected at all is detected immediately after ignition of the burner. Such a symptom is almost the same as the symptom when the primary gas pressure supplied to the burner is lowered, and it has been difficult to confirm the cause in the past. When the operation was repeated continuously, it was found that when the ground wire breakage was the cause, the flame was detected only at the first ignition, and no flame was detected thereafter. The failure diagnosis sequence shown in FIG. 4 shown below is a failure diagnosis sequence performed based on such tests and researches, and this makes it possible to identify the cause of a detection abnormality due to a ground wire disconnection.
[0036]
Therefore, in the failure diagnosis sequence shown in FIG. 4, first, an ignition command signal is transmitted to the ignition device 4 in step S1 of FIG. Then, the presence / absence (on / off) of flame detection at the frame rod at that time is determined (see step S2 in FIG. 4). If there is no flame detection at this time, the flame rod itself fails or the ignition device 4 It is determined that there is an abnormality (see steps S3 and S4 in FIG. 4).
[0037]
On the other hand, when it is determined in step S2 in FIG. 4 that the flame is detected, the failure diagnosis support apparatus 1 temporarily stops the ignition operation and then restarts the ignition operation again (see step S5 in FIG. 4). Then, after this re-ignition, the presence or absence of flame detection on the frame rod is confirmed (see step S6 in FIG. 4). If no flame is detected here, it is diagnosed that there is an abnormality due to the disconnection of the ground wire (step in FIG. 4). (See S7).
[0038]
Also, if there is a flame detection in step S6 in FIG. 4, after continuing the combustion for several seconds as it is (see step S8 in FIG. 4), it is determined whether or not the flame is detected by the frame rod (see step S9 in FIG. 4). If no flame is detected here, it is diagnosed that the blow-out due to a decrease in the primary gas pressure (see step S10 in FIG. 4). When the flame is normally detected in any of steps S2, S6, and S9 in FIG. 4, it is determined that there is no abnormality in the ignition operation itself including the frame rod (see step S11 in FIG. 4).
[0039]
As described above, by using the failure diagnosis sequence shown in FIG. 4 based on the tests and researches of the applicant of the present application, it becomes possible to easily diagnose a flame detection abnormality due to erroneous detection of the frame rod, and to reduce the primary gas pressure. It is possible to determine whether or not it is due to.
[0040]
B. Diagnosis of Failure of Temperature Sensor of Hot Water Supply Device 2 Next, diagnosis of failure of the temperature sensor of hot water supply device 2 will be described with reference to FIGS.
[0041]
The hot water supply device 2 shown in FIG. 6 includes a low-temperature terminal (for example, a floor heating panel) 61 and high-temperature terminals (for example, a hot water air conditioner and a panel heater) 62 and 63 as the above-described terminal heating device 6. In this case, each of the low-temperature and high-temperature terminal heating devices 6 is configured to receive the supply of hot water from the heat exchanger (heat source) 7 of the hot water supply device 2.
[0042]
Specifically, the high temperature hot water heated by the heat exchanger 7 is circulated to the heat exchanger 7 again via the high temperature terminals 62 and 63, the expansion tank 8 and the pump 9, as indicated by arrows in the figure. Is configured to do. The expansion tank 8 is open to the atmosphere and connected to a non-illustrated water supply system, and hot water deprived of heat at the high temperature terminals 62 and 63 is led to the expansion tank 8.
[0043]
On the other hand, the low temperature terminal 61 is supplied with low temperature hot water branched on the upstream side of the heat exchanger 7 (specifically, the branch point a on the downstream side of the pump 9). The low-temperature hot water that has passed through the low-temperature terminal 61 joins the high-temperature water circulation path upstream of the junction b with the bypass pipe 10, passes through the expansion tank 8 and the pump 9, and again reaches the low-temperature terminal 61. It is configured to circulate.
[0044]
FIG. 6 is an explanatory diagram showing a schematic configuration around the heat exchanger 7 of the hot water supply apparatus 2. Parts that are the same as those in FIG. 5 described above are denoted by the same reference numerals and description thereof is omitted. In FIG. 6, reference numeral 21 a denotes a connection terminal for connecting the control unit 21 and the communication cable L.
[0045]
As shown in FIG. 6, in the hot water supply apparatus 2, temperature sensors 51 and 52 for detecting the temperature of hot water in the circulation path are provided on the upstream side and the downstream side of the heat exchanger 7, respectively. A procedure for diagnosing the operation of these temperature sensors 51 and 52 using the diagnosis support apparatus 1 will be described.
[0046]
In this case, first, the failure diagnosis support apparatus 1 outputs an operation command to close the thermal valves 61a to 63a of the terminal heating apparatus 6 shown in FIG. That is, first, prior to diagnosis, a circulation path that is connected to the expansion tank 8 and the pump 9 is configured from the heat exchanger 7 without going through the terminal heating device 6. In this state, an instruction to insert the temperature sensor 34 provided in the interface device 3 into the expansion tank 8 is displayed on the display means 12.
[0047]
Then, after waiting for the operator to input the completion of the operation of inserting the temperature sensor 34 into the expansion tank 8 to the failure diagnosis support apparatus 1, the failure diagnosis support apparatus 1 performs the next step as a next step. An operation command for commanding the device 2 is transmitted. Specifically, a command to perform a hot water supply operation at a predetermined set temperature for a certain period of time and a command to operate the pump 9 are started to start the circulation of hot water in the circulation path described above.
[0048]
Then, after the hot water supply operation is stopped, wait until the temperature of hot water in the circulation path (the circulation path of the heat exchanger 7, the expansion tank 8, and the pump 9) becomes constant (specifically, about several minutes). When the temperature of the hot water in the circulation path becomes constant, the temperatures detected by the temperature sensors 51 and 52 and the temperature sensor 34 of the interface device 3 are acquired by communication. Then, the failure diagnosis unit 13 compares these acquired temperatures, and uses the temperature detected by the temperature sensor 34 as a reference temperature, from the difference between the reference temperature and the temperature detected by the other temperature sensors 51 and 52. Failure diagnosis of the temperature sensors 51 and 52 is performed.
[0049]
That is, in this case, since the medium (terminal heating device 6) that consumes temperature is not interposed in the circulation path, the detection values of these three temperature sensors 34, 51, and 52 should all be the same. In this case, if there is a deviation between them, it can be diagnosed that the temperature sensor 51 or 52 that caused the deviation is abnormal, and the result is displayed on the display means 12. In this case, it is assumed that the temperature sensor 34 of the interface device 3 has been confirmed to be normal in advance, and of course a certain allowable range is set for the temperature deviation. It is.
[0050]
Further, in order to perform a more accurate failure diagnosis in relation to this diagnosis, it is desirable to repeat the diagnosis again after changing the hot water supply set temperature after performing the diagnosis once. In that case, the temperature sensors 51 and 52 diagnosed as malfunctioning are diagnosed as abnormal when executed at different hot water supply set temperatures even if it is determined to be normal in the initial malfunction diagnosis. is there.
[0051]
As described above, according to the failure diagnosis support apparatus 1 according to the present invention, the diagnosis of the temperature sensors 51 and 52 can be easily performed only by simple connection / operation. It is possible to use the accurate detected temperature in other failure diagnosis performed thereafter.
[0052]
The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope of the invention.
[0053]
For example, in the above-described embodiment, the failure diagnosis support apparatus 1 and the interface device 3 are configured as separate bodies, but this is because a notebook personal computer is used as the failure diagnosis support apparatus 1 and is dedicated. If an apparatus is manufactured, it is also possible to constitute these integrally.
[0054]
Moreover, although the dropping circuit to a bathtub is not shown in the hot water supply apparatus 2 in embodiment mentioned above, the failure diagnosis assistance apparatus 1 of this invention is applicable also to the hot water supply apparatus provided with this dropping circuit. In this case, of course, the valve of the dropping circuit is closed during the above-described diagnosis.
[0055]
【The invention's effect】
As described above in detail, according to the failure diagnosis support apparatus for a hot water supply apparatus according to the present invention, abnormality diagnosis of the ignition system of the hot water supply apparatus, abnormality diagnosis of the temperature sensor of the hot water supply apparatus, etc. can be performed in an interactive manner with the operator. This can be easily performed, and the labor and labor required for the diagnosis of the hot water supply device can be greatly reduced. In addition, the operator can easily perform a failure diagnosis with almost no specialized knowledge about a wide variety of hot water supply apparatuses.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a schematic configuration of a failure diagnosis support device according to the present invention and a connection situation when the failure diagnosis support device is connected to a hot water supply device.
FIG. 2 is a flowchart showing an example of an ignition system failure diagnosis procedure (failure diagnosis sequence) using the failure diagnosis support apparatus.
3 is a configuration diagram showing a schematic configuration of an ignition device to be diagnosed in the failure diagnosis of FIG. 2;
FIG. 4 is a flowchart showing another embodiment of the failure diagnosis procedure (failure diagnosis sequence) of the ignition system using the failure diagnosis support apparatus according to the present invention.
FIG. 5 is a schematic configuration diagram showing an example of a hot water circulation circuit of a hot water supply device.
FIG. 6 is an explanatory diagram showing the arrangement of the temperature sensor and the state of the circulation circuit in the failure diagnosis of the temperature sensor using the failure diagnosis support apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Failure diagnosis support apparatus 11 Memory | storage means 12 Display means 13 Failure diagnosis means 14 Input means 15 Data communication means 2 Hot-water supply apparatus 21 Control part 31 Data communication means 3 Interface apparatus 32 Measuring instrument part 34 Temperature sensor 4 Ignition apparatus 42 Spark plug 51, 52 Temperature Sensor 6 Terminal Heating Device 61 Low Temperature Terminal 62, 63 High Temperature Terminal 7 Heat Exchanger 8 Expansion Tank L Communication Cable

Claims (3)

In accordance with a predetermined failure diagnosis sequence stored in the storage means, the failure diagnosis means instructs the hot water supply apparatus to perform an operation necessary for failure diagnosis while displaying the failure diagnosis procedure of the hot water supply apparatus on the display means in an interactive manner, and from the outside. In the failure diagnosis support device configured to perform failure diagnosis based on the obtained information,
The fault diagnosis sequence is
A predetermined ignition command signal is output to the hot water supply device, and a request for confirming the presence or absence of an ignition operation corresponding to the ignition command signal by the operation sound of the ignition device is displayed on the display unit. A first step;
When the confirmation result input in response to the first step is affirmative, the ignition plug is removed from the ignition device, and the high-pressure cord connected to the ignition plug is fixed to the can body of the water heater. A second step of displaying an instruction to that effect on the display means;
A third step of waiting for an input of work completion corresponding to the second step to output an ignition command signal again and causing the display means to display an input request for a discharge status from the high voltage cord at that time. And
The display of the discharge status input request in the third step includes a first selection branch indicating that there is no discharge from the high voltage cord, and a second selection branch indicating discharge from the middle of the high voltage cord. , Configured to display a third selection branch that discharges from the tip of the high-voltage cord,
When the first selection branch is selected, it is determined that the ignition device is abnormal. When the second selection branch is selected, it is determined that the high-voltage cord is abnormal, and the third selection branch is selected. And determining whether the spark plug is abnormal . In accordance with a predetermined failure diagnosis sequence stored in the storage means, the failure diagnosis means instructs the hot water supply apparatus to perform an operation necessary for failure diagnosis while displaying the failure diagnosis procedure of the hot water supply apparatus on the display means in an interactive manner, and from the outside. In the failure diagnosis support device configured to perform failure diagnosis based on the obtained information,
The fault diagnosis sequence is
An operation command for shutting off the flow of water from the hot water supply device to the terminal heating device is supplied, and the heat exchanger of the hot water supply device is connected to the expansion tank and the pump without going through the terminal heating device. A first step of configuring a hot water circulation path;
A second step of causing the display means to display an instruction to insert a temperature sensor serving as a reference at the time of failure diagnosis into the expansion tank;
Waiting for the input of work completion corresponding to the second step, an operation command for performing a hot water supply operation at a predetermined set temperature for a predetermined time is transmitted to the hot water supply device, and hot water is circulated through the circulation path. A third step of
After the hot water supply operation is stopped, the detection value of the temperature sensor arranged in the circulation path and the detection value of the temperature sensor serving as the reference are acquired, compared, and arranged in the circulation path. A fault diagnosis support apparatus for a hot water supply apparatus, comprising a fourth step of performing a fault diagnosis of a temperature sensor . A failure diagnosis support apparatus for a hot water supply apparatus , wherein the failure diagnosis sequence according to claim 2 is repeated by changing the set temperature .

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