JPH08210633A - Burning equipment with exhaust system malfunction warning - Google Patents

Abstract

PURPOSE: To inform whether an exhaust system is correctly executed or not to an executor when a burning equipment for feedback controlling a fan motor is installed. CONSTITUTION: An execution failure discriminator 12 for entering an execution failure discriminating mode by the operation of a test switch 13 is provided. The discriminator 12 burns the burner 23 of a burning unit by a predetermined burning amount, and feedback controls a fan motor 25 at a suitable predetermined number of revolutions at a predetermined burning amount by a fan motor feedback controller 11. In this case, if the fan motor driving voltage Vf to be applied to the motor 25 is deviated from the normal range, a warming signal is generated to drive a warning informing unit 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system construction error caused by an error in installation work or an incorrect installation location when actually installing a combustion device such as a water heater in each home. The present invention relates to a combustion device that can notify

[0002]

2. Description of the Related Art Many of the recent combustors such as gas water heaters are of the so-called forced air supply type, and in actual use, that is, in the normal operation mode, the combustion control circuit causes the user to twist the faucet. After starting the combustion in the combustor by detecting the occurrence of water flow, the fan sends the optimum amount of air corresponding to the amount of combustion at that time to the combustor. Therefore, the fan motor that rotates the fan is variably controlled to have a rotation speed that corresponds to the combustion amount,
And to keep the number of revolutions fixed at each time constant,
Feedback controlled. However, recently, as a new feedback control method developed by the applicant, in consideration of the drive current actually flowing in the fan motor under the use condition, feedback control is performed so as to keep this at the set drive current value at each time. There is also a method.

[0003]

In any case, such feedback control of the fan motor assumes that the exhaust system is normal, that is, the load of the fan (the amount of air driven by the fan) is normal. It is done assuming that it is within the range. However, when installing the combustion equipment in the first place, the installation environment was such that the standard exhaust port installed in the equipment was blocked, or an irregular exhaust that exhausted by connecting an appropriate exhaust pipe according to individual housing conditions. In the mouth type, if the construction of the exhaust pipe is incorrect, the feedback control may be reversed.

For example, whether the exhaust port is a regular exhaust port or an irregular exhaust port, if the exhaust system including the exhaust port is clogged due to clogging or the like, the amount of driving air for the fan decreases (load of the fan). Therefore, compared to the case where the exhaust system is normal, the rotation speed of the fan motor will increase even with the same drive power. Therefore, the feedback control functions to keep this within the predetermined rotational speed fluctuation range,
Since the fan motor speed is substantially reduced,
In practice, the amount of air supplied to the combustion section becomes insufficient. In other words, when the exhaust system tends to be blocked, the fan motor must rotate at a higher rotational speed to compensate for the insufficient supply air amount, but the feedback control suppresses this. is there.
Insufficient supply of air may lead to improper combustion and, in some cases, serious danger.

On the contrary, if the exhaust system must be connected to an exhaust pipe having a predetermined cross-sectional area and a length within a predetermined range, but if not, the amount of air to be driven becomes too large (fan load). May become too heavy). In this case,
The feedback control always gives a large drive power to the fan motor in order to increase the rotating speed of the fan motor, which is about to decrease, resulting in unnecessary power consumption.
If such an overloaded state continues for a long time, the fan motor may be burned out.

On the other hand, the feedback control of the fan motor is indispensable for the combustion equipment which has been properly constructed in order to achieve optimum combustion under the normal operation mode, and it cannot be omitted. If the feedback control is performed in consideration of the fan motor drive current described above, it is possible to effectively follow the exhaust system abnormality as described above to a considerable extent, and compensate for the amount of air that is about to become insufficient. Although it works to reduce the amount of air that is about to become too much, it is of course not desirable that the exhaust system is abnormal from the time of construction. Therefore, in the present invention, it is intended to provide a combustion device having a function of notifying a construction abnormality of the exhaust system in the first place before using the water heater at the stage where the installation construction is completed.

[0007]

In order to achieve the above object, in the present invention, a fan motor for driving a fan is provided in order to stably feed an appropriate amount of air to the combustion section by the fan. The following constituent features are added to the combustion equipment that performs feedback control. (a) Test start signal generating means capable of selectively issuing a test start signal. (b) When the test start signal is received, the construction abnormality determination mode is entered, and in this mode, the combustion section is burned with a predetermined combustion amount, and the fan is controlled by the above feedback control so as to maintain the predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality determination circuit that issues an alarm signal when the drive voltage applied to the fan motor deviates from a predetermined range when the motor is controlled. (c) A notification device that receives the above-mentioned alarm signal and issues an alarm that can be recognized by a person.

However, the exhaust system construction abnormality judging circuit of the above constituent requirement (b) is, according to each of the other aspects of the present invention,
It can be replaced with any one of the following configuration requirements (d), (e), (f). (d) When the test start signal is received, the construction abnormality determination mode is entered, and in this mode, the combustion section is burned with a predetermined combustion amount, and the fan is controlled by the above feedback control so as to maintain the predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality determination circuit that issues an alarm signal when the drive current supplied to the fan motor deviates from a predetermined range when the motor is controlled. (e) When the test start signal is received, the construction abnormality judgment mode is entered, and in this mode, the combustion section is burned with a predetermined combustion amount, and the fan is controlled by the above feedback control so as to maintain the predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality determination circuit that issues an alarm signal when the feedback correction amount required to keep the fan motor at a predetermined rotation speed deviates from a predetermined range when the motor is controlled. (f) When the test start signal is received, the construction abnormality determination mode is entered, and in this mode, the combustion part is burned with a predetermined combustion amount, while the predetermined amount corresponding to the predetermined combustion amount set in the feedback control of the fan motor is set. Exhaust that issues a warning signal when the actual rotation speed of the fan motor rotating in that state is deviated from the predetermined range while applying the drive power for rotating the fan motor at the rotation speed to the fan motor System construction abnormality judgment circuit.

Further, according to a preferred aspect of the present invention, (g) the exhaust system construction abnormality determination circuit outputs a pass notification signal and outputs a construction success notification when the warning signal is not issued in the construction abnormality determination mode. Operating the device;
(H) The exhaust system construction abnormality determination circuit terminates the construction abnormality determination mode when the alarm signal is not issued in the construction abnormality determination mode, and the combustion equipment is normally operated. It is also possible to propose a combustion device characterized by being attached to the operation mode of.

Further, the notification device according to the above configuration requirement (c) can be configured to include a device for generating an audible sound such as a buzzer that can be heard, recognized and understood by a person. The construction success notification device in the above configuration requirements (g) is also a notification device that issues an alarm by setting the alarm issued when an alarm signal is received and the acceptance notification issued when a acceptance notification signal is different from each other. The same notification device can be used. In addition, the above configuration requirements
The test start signal generating means in (a) includes a test switch incorporated in (a-1) the exhaust system construction abnormality determination circuit, and a circuit for generating a test start signal by manually operating the test switch,
(a-2) A portable device that is detachably connected to the exhaust system construction abnormality determination circuit via the test start signal transmission connector and has a test switch, and that generates a test start signal by manually operating the test switch. (a-3) It has a transmitter circuit and a test switch, and by manually operating the test switch, the transmitter circuit sends a modulation test start signal that is modulated by being placed on a radio frequency or a light wave, and connected to the exhaust system construction abnormality determination circuit. As a portable device that receives and demodulates the modulated test start signal by the receiving circuit as a test start signal, (a-4) As a power-on detection circuit that detects the power-on and automatically generates the test start signal, etc. Can be configured.

[0011]

FIG. 1 shows a schematic configuration of a preferred embodiment of a combustion device with an exhaust system construction abnormality alarm constructed according to the present invention. The subject of the present invention may be a forced-air-combustion type combustion device using a fan, the fuel type is not limited, and it may be a water heater or a heater, and a combustion device for other purposes. Although it is good, a gas water heater is assumed in the illustrated case. Further, the basic operation of the gas water heater, that is, the mode of combustion and hot water supply operation in the normal operation mode itself is not particularly changed in the present invention, and may be the same as a known existing one. For example, when water is generated by the user opening a faucet or the like (not shown), it is detected by a water sensor (not shown) or the like, and the burner 23 as a combustion unit is ignited by an igniter (not shown).
The burner 23 is, of course, supplied with gas as fuel through the gas proportional valve 24, but after the start of combustion, for example, the amount of combustion required at each time according to the required data such as the hot water temperature set by the user. The fuel valve control circuit 15 controls the valve opening of the gas proportional valve 24 so that the amount of supply gas is commensurate with the above, whereby the water supplied from the tap water via the heat exchanger 26 heated appropriately is added. The water is heated to the temperature desired by the user and hot water is supplied. In practice, feedback control is also used for this hot water supply temperature control, but this is not directly related to the present invention, so illustration and description thereof are omitted.

Further, at the time of combustion in the burner 23, the fan motor feedback control circuit 11 which may itself be the same as that in the known existing combustion equipment is used to provide the burner 23 with an air amount suitable for the combustion amount at each time. In order to stably feed the fan, the fan motor 25 that drives the fan is feedback-controlled. That is, the fan motor rotation speed range is, for example, about 3000 rpm to about 6000 rpm in a typical model, but the fan motor feedback control circuit 11
Performs feedback control of the fan motor 25 within this range so as to keep the rotation speed determined according to the combustion amount at each time. Therefore, the rotation system including the fan motor 25 or the fan driven by the fan motor 25 is provided with a sensor (not shown in the figure itself) that takes in the actual rotation speed (actual rotation speed) Sa at each time. The actual rotation speed data Sa is input to the fan motor feedback control circuit 11. Also, in a typical model, the fan motor rotation speed range of about 3000 rpm to about 6000 rpm is obtained by varying the drive voltage Vf applied to the fan motor 25 between 20V and 40V.

FIG. 4 shows an example of such a relationship between the drive voltage and the fan rotation speed. However, in this case, a width of approximately ± 200 rpm is set as the normal range Δ with respect to the set rotation speed at that time. Shows.

However, in this type of combustion equipment, the main constituent parts such as the combustion part are housed in an appropriate housing,
The housing wall 22 of the housing is provided with a fixed exhaust port 21 having a fixed opening position and opening area, or is provided with a predetermined size so that it can flexibly cope with each house in which a water heater is installed. An exhaust pipe (an indeterminate exhaust port 21 ') allowed to a predetermined length range in the cross-sectional area range is connected.

However, in the case of the type in which the standard exhaust port 21 is used as it is, the construction is not satisfactory and the standard exhaust port 21
It is possible that some or all of 21 will be blocked or close to this. In addition, when the irregular exhaust port 21 'is used, the operator may not be aware of the fact that the exhaust pipe to be connected could not be connected well, in addition to the possibility of the closed condition. In such a case, if the construction is completed and it is used by the user, a problem occurs in controlling the fan.

FIG. 3 shows an experimental result by the present inventor for explaining this point. That is, when the fan motor feedback control circuit 11 feedback-controls the fan motor 25 so that the fan rotation speed is kept constant at 4000 rpm in a specific gas water heater, when the exhaust system is normally constructed, As shown in (A), the drive voltage Vf applied to the fan motor had a center value of 27V, and the range of ± 2V could be regarded as the normal range ΔV. However, if the exhaust pipe is intentionally clogged, the fan motor with a lighter load (the amount of air driven by the fan has decreased) tries to rotate at a higher rotation speed, and this is suppressed to maintain a constant rotation speed of 4000 rpm. Fan motor drive voltage output by feedback control circuit 11 for
Vf is reduced to 20V. Conversely, if the exhaust pipe is removed and the load of the fan is intentionally increased, the fan motor speed that is about to decrease is increased, and the feedback control circuit 11 is used to maintain the constant speed of 4000 rpm. The fan motor drive voltage Vf output by the device has risen to 33V.

Next, when the above-mentioned situation is observed by the current flowing through the fan motor, it becomes as shown in FIG. 3 (B), and the fan motor drive current If is 0.80 under the normal construction condition of the exhaust system.
A was 0.72A to 0.86A, which could be regarded as the normal range ΔI, but when the exhaust pipe was blocked, the constant rotation speed was 4000 rpm.
The fan motor drive current If is 0.58A, which is the result of feedback control in order to protect the
Became.

Further, in order to see how much the feedback control circuit 11 performs the feedback correction in terms of the rotation speed of the fan, when the feedback control is removed, the fan rotation speed when the exhaust pipe is blocked is up to 5000 rpm. It rose and dropped to 3200 rpm when the exhaust pipe was disconnected. In other words,
While the feedback correction amount in the normal rotation speed range Δ is ± 200 rpm as described above, the feedback control circuit 11 is equivalent to −1000 rpm in fan rotation speed conversion when an abnormal construction such as exhaust pipe blockage is performed. Feedback correction is performed and +800 rpm during abnormal construction equivalent to exhaust pipe non-connection
It turns out that a considerable amount of feedback correction is performed. It should be noted that the change in the number of revolutions during abnormal construction with feedback control removed is the voltage applied to the fan motor.
In the variable range of Vf of 20V to 40V, it is also shown in FIG. In the figure, what is shown above is that when the exhaust pipe is blocked, and what is shown below is that when the exhaust pipe is not connected.

Based on such knowledge, the embodiment of the present invention shown in FIG. 1 is provided with the exhaust system construction abnormality judging circuit 12 which operates according to the flow chart shown in FIG.
Further, it is provided with an informing device 14 for informing the result.
In this embodiment, the alarm device 14 also includes an alarm alarm device 16 for alarming a construction abnormality of the exhaust system, and a construction success notification device 17 for notifying the result of judgment that normal construction is being performed. Further, many hot water heaters of recent years use a microcomputer as a combustion control circuit, and the fan motor feedback control circuit 11 and the fuel valve control circuit shown in FIG. 1 are used.
15, and further, including various arithmetic circuits not shown, are realized by software by the microcomputer, but the exhaust system construction abnormality judging circuit 12 for executing the operation of the present invention described below also has such a microcomputer. Can be realized equivalently.

The operation of the exhaust system construction abnormality determination circuit (hereinafter simply referred to as the determination circuit) 12 will be described below step by step. An operator who has finished installing the gas water heater will install the gas water heater at an appropriate position in the water heater. Push button type and slide type, etc.
Operate the test switch 13 of an appropriate operation type. As a result, the test start signal Sd is given to the determination circuit 12,
Thereafter, the construction abnormality determination mode shown in step 31 in the flowchart of FIG. 2 is entered. However, test switch 13
Is not limited to the electric switch that is substantially incorporated into the determination circuit 12 and is manually operated as described above, but the determination circuit is connected via the test start signal transmission connector 18 as shown by a virtual line in FIG. Mobile device detachably connected to 12
It may be provided in 19. That is, the builder connects the portable device 19 (which may be, for example, an electronic notebook or a portable personal computer etc.) via the connector 18 after the construction, and a specific switch or key attached to the portable device 19 is used as the test switch 13. The test start signal from the portable device 19 is manually operated or by manually operating a plurality of switches (keys) as the test switch 13 in a predetermined manner.
Sd may be generated and transmitted to the determination circuit 12 via the connector 18. Further, as is also recognized in the mobile device 20 indicated by virtual lines, the above wire transmission can be replaced with wireless transmission or optical transmission.
That is, the portable device 20 is provided with a transmitter circuit Tx and a test switch.
13 is provided, and the transmission circuit Tx transmits a modulation test start signal Sd ′ which is modulated by being placed on a radio frequency or a light wave (such as infrared rays) by a manual operation of the test switch 13, while the combustion equipment is A receiving circuit Rx connected to the determination circuit 12 is provided, and the receiving circuit Rx allows the modulation test start signal S
d'is received and demodulated, and the judgment circuit 1 is used as the test start signal Sd.
Can be given to 2. Further, in FIG. 1, as also shown by a virtual line, a power-on detection circuit 27 is provided, and the operator does not manually operate the power-on, but simply turns on the power of the combustion equipment after the construction (for example, a power plug is commercially available. The power-on detection circuit 27 may be configured to detect the power-on by simply inserting it into an AC power supply, and thereby automatically issue the test start signal Sd.

In any case, the judging circuit 12 which has entered the construction abnormality judging mode shown in step 31 in FIG. 2 by receiving the test start signal Sd, first, as shown in step 32 in FIG. It is determined whether the construction completion flag has already been set. The construction completion flag assumed in the present embodiment is a volatile memory area (RAM: not shown) attached to the microcomputer that substantially constitutes the judgment circuit 12 when it is judged that the construction is carried out normally. If the flag is already set, it means that there is a history of being judged as normal construction by the judgment operation described later, so as shown in step 40, The illustrated gas water heater is entrusted to the control under the normal operation mode (that is, as a use permission state by the user), and the present construction abnormality determination mode is ended.

However, when the test start signal Sd is issued at the stage when the construction is finished, it is judged in the judgment step 32 that the construction completion flag is not set.
The determination circuit 12 moves to the next step 33, activates an ignition device (not shown) to ignite the burner 23, and then works on the existing fuel valve control circuit 15 and the fan motor feedback control circuit 11 to determine in advance at the design stage. The burner 23 is controlled so that the burner 23 burns at a predetermined burned amount. The predetermined combustion amount at this time can be set arbitrarily, but for example, it is simply the minimum combustion amount or the maximum combustion amount. In this way, the fan motor 25 is also feedback-controlled by the fan motor feedback control circuit 11 so as to satisfy the predetermined fan rotation speed set as appropriate at the time of the predetermined combustion amount, and this predetermined rotation speed is also It can be obtained at the design stage.

When the combustion at the predetermined combustion amount becomes stable (that is, after the predetermined time has elapsed), the determination circuit 12 moves to step 34 and the parameter of interest regarding the drive of the fan motor 25 under feedback control is within the normal range. Determine whether or not. As the parameters of interest here, as is clear from the knowledge already described with reference to FIGS. 3 and 4, the drive voltage Vf of the fan motor 25, the drive current If, and the fan motor feedback control circuit 11 keep the predetermined rotation speed. It is possible to select any one of the feedback correction amount ( or the feedback correction amount in terms of rotation number ) related to the fan motor drive voltage or drive current used for this purpose.

For the sake of explanation, if attention is paid to the drive voltage Vf, for example, if the exhaust system is normally constructed, the drive to the fan motor 25 during the test combustion with the above predetermined combustion amount is performed. The voltage Vf also takes a value within the normal range Δ in FIG. 4, but when the exhaust pipe is in a closed state or the exhaust pipe to be connected is not connected, the drive voltage Vf is out of the normal range. Come off. For example, when the predetermined combustion amount set during the test combustion performed here is an appropriate combustion amount to rotate the fan motor 25 at 4000 rpm, as shown in FIG. 3 (A). , The normal range is the voltage range ΔV from 25V to 29V
If it deviates from this, it can be judged that the exhaust system is abnormally installed, and if it is not, it is normal.

Similarly, when the target parameter is the fan motor drive current If, for example, as described with reference to FIG. 3 (B), the predetermined combustion amount during the test combustion is the fan motor rotation speed 4000 rpm. If it is set appropriately, the normal current value range ΔI is 0.72A to 0.86A.
If it deviates from this, it can be judged that the exhaust system is abnormally installed, and if it is not, it is normal.

Further, if the parameter of interest is the feedback correction amount (voltage or current) used when the fan motor feedback control circuit 11 performs feedback control, or its rotational speed conversion value, FIG. 3C and FIG. As explained in accordance with, the fan motor speed conversion is ± 20
If the feedback control is performed within the range of 0 rpm, it is determined to be normal, but if it exceeds this, it can be determined to be abnormal construction.

On the other hand, during the test combustion performed here, the operation of the fan motor feedback control circuit 11 may be invalidated and the feedback control may be cut off to determine whether the exhaust system is abnormal or normal. For example, if the fan motor rotation speed is 4000
If the combustion amount is set to rpm and normal construction is performed, the fan motor 25 or the actual rotation speed Sa of the fan at that time can be set without feedback control.
(Fig. 1) should be within ± 200 rpm as shown in Fig. 3 (C). However, when the exhaust pipe is blocked or forgotten to be connected, the actual rotation speed Sa of the fan motor or fan deviates significantly from the ideal rotation speed of 4000 rpm, as shown in Fig. 3 (C). . Therefore, the actual rotation speed Sa obtained from the fan motor 25 or the fan is detected, and it is detected whether or not this deviates from the predetermined range ± 200 rpm. Can be judged as normal construction.

In any case, in step 34, it is judged whether or not the above noted parameter is within the normal range, and if it is out of the normal range, the process proceeds to step 35 to stop the test combustion. After that, in step 36, the determination circuit 12 outputs a construction failure alarm signal, and the alarm notification device 16 in the notification device 14 shown in FIG. 1 is activated. The alarm notification device 16 may be any device that issues an alarm (preferably an audible sound) that can be recognized and understood by a person, but for example, a buzzer may be simply used, and the buzzer may be a predetermined buzzer, for example. For longer than this time, it may be in the form of a long, small beeping sound.

When the alarm is issued in this way, the operation of the construction abnormality determination mode is terminated in the determination circuit 12, whereby the construction operator can confirm that there is some abnormality in the construction of the exhaust system. I can know.

On the other hand, when the parameter of interest is within the normal range in the determination step 34 for the parameter of interest, the determination circuit 12 proceeds to step 37 and sets the construction completion flag at the predetermined position of the memory area described above. After that, a construction success notification signal is output to the construction success notification device 17 in the notification device 14 to notify the success of the construction. At this time, the pass notification may be arbitrary including visible display such as once turning on the lamp.However, when an audible sound display is adopted, a form different from the alarm notification sound form indicating the construction failure, for example, a small "pip" Differentiate as a notification form that ends with a beep. However, when the pass notification is also displayed as an audible sound in this way, the construction success notification device 17 may be a device that is substantially the same as the alarm notification device 16 described above, for example, a buzzer. In any case, if the acceptance is notified, the determination circuit 12 then stops the test combustion as shown in step 39, and ends the construction abnormality determination mode.
However, it may be changed so that the notification of acceptance is given after the combustion is stopped.

When the feedback control is intentionally turned off with the actual rotation speed Sa of the fan or fan motor as the parameter of interest in the step of determining whether or not the parameter of interest already described is within the normal range. Moreover, after the main construction abnormality determination mode is ended and the control circuit provided in the equipment is shifted to the normal combustion control, the feedback control of the fan motor 25 is naturally valid. In addition, by the above-mentioned series of actions, once the construction abnormality of the exhaust system is once determined, if the test switch 13 is operated once again, if there is an abnormality in the exhaust system, the steps described so far. According to the above, the alarm will eventually be reissued, and conversely, if normal construction has already been performed, the construction completion flag has already been set in the previous test, so the process moves from step 32 to step 40, and Further, the operation of the test switch 13 is ignored and the normal operation mode can be entered. Of course, the operator who heard the alarm re-inspects and re-installs, and then operates the test switch 13 again, or if the power-on detection circuit 27 is provided, disconnect the power plug once and re-install. If you plug it in again after
It is possible to know whether or not the re-construction was appropriate, and if it is appropriate, a notification of acceptance will be given and the equipment can be used. Otherwise, an alarm will be issued again.

[0032]

As described above, according to the present invention, it is possible to inform a builder of whether or not the construction of the exhaust system has been normally completed at the time of completion of the construction in the compulsory air supply type combustion device using the fan. In the case of poor construction, the contractor can be obliged to re-examine and the subsequent retest can be performed, so that the user can be allowed to use the device with peace of mind.

[Brief description of drawings]

FIG. 1 is a schematic circuit configuration diagram of an embodiment of a combustion device with an exhaust system construction abnormality alarm configured according to the present invention.

FIG. 2 is a flowchart relating to the operation of a construction abnormality determination circuit in the combustion device shown in FIG.

FIG. 3 is an explanatory diagram illustrating a relationship between each parameter and a rotation speed related to fan motor driving when a fan or a fan motor is rotating within a normal rotation speed range and when the fan or fan motor is not rotating within a normal rotation speed range.

FIG. 4 is an explanatory diagram showing an example of a relationship between a change in drive voltage applied to a fan motor and a fan rotation speed.

[Explanation of symbols]

 11 Fan motor feedback control circuit, 12 Exhaust system construction error judgment circuit, 13 Test switch, 14 Notification device, 15 Fuel valve control circuit, 16 Construction error alarm device in notification device, 17 Construction success notification device in notification device, 18 Detachable connector for transmitting test start signal, 19 Portable device with test switch, 20 Portable device with transmitter circuit and test switch, 21 Regular exhaust port, 21 'Irregular exhaust port, 23 Burner or combustion section, 25 Fan motor, 27 power-on detection circuit, Sd test start signal, Sd 'modulation test start signal Tx transmission circuit, Rx reception circuit.

Claims (12)

[Claims] 1. A combustion device for feedback-controlling a fan motor for driving a fan so as to stably feed an appropriate amount of air to the combustion section by a fan, the combustion device being selectively tested. A test start signal generating means capable of issuing a start signal; when the test start signal is received, a construction abnormality determination mode is entered, and in the mode, the combustion section is burned with a predetermined combustion amount, and the feedback control is performed to the predetermined combustion amount. An exhaust system construction abnormality determination circuit which issues an alarm signal when the drive voltage applied to the fan motor deviates from a predetermined range when the fan motor is controlled so as to maintain a corresponding predetermined number of revolutions; A combustion device with an exhaust system construction abnormality alarm, comprising: an informing device that receives and issues an alarm. 2. A combustion device for feedback-controlling a fan motor for driving a fan so as to stably feed an appropriate amount of air to the combustion section by a fan, the combustion device being selectively tested. A test start signal generating means capable of issuing a start signal; when the test start signal is received, a construction abnormality determination mode is entered, and in the mode, the combustion section is burned with a predetermined combustion amount, and the feedback control is performed to the predetermined combustion amount. An exhaust system construction abnormality determination circuit that issues an alarm signal when the drive current supplied to the fan motor deviates from a predetermined range when the fan motor is controlled so as to maintain a corresponding predetermined number of revolutions; A combustion device with an exhaust system construction abnormality alarm, comprising: an informing device that receives and issues an alarm. 3. A combustion device for feedback-controlling a fan motor for driving a fan so as to stably feed an appropriate amount of air to the combustion section by a fan, the combustion device being selectively tested. A test start signal generating means capable of issuing a start signal; when the test start signal is received, a construction abnormality determination mode is entered, and in the mode, the combustion section is burned with a predetermined combustion amount, and the feedback control is performed to the predetermined combustion amount. An exhaust system construction abnormality determination circuit which issues an alarm signal when the feedback correction amount required for the feedback control deviates from a predetermined range when the fan motor is controlled so as to maintain a predetermined rotational speed corresponding thereto; And an alarm device for issuing an alarm; and a combustion device with an exhaust system construction abnormality alarm. 4. A combustion device for feedback-controlling a fan motor for driving a fan so as to stably feed an appropriate amount of air to the combustion section by the fan, the test being selectively conducted. A test start signal generating means capable of issuing a start signal; when receiving the test start signal, a construction abnormality determination mode is entered, and in the mode, the combustion section is burned with a predetermined combustion amount while the feedback control of the fan motor is performed. The feedback control is turned off while applying the drive power for rotating the fan motor at the predetermined number of revolutions corresponding to the predetermined combustion amount set in the above, to the feedback control of the fan motor rotating in that state. An exhaust system construction abnormality determination circuit that issues an alarm signal when the actual number of revolutions deviates from a prescribed range; A combustion device with an exhaust system construction abnormality alarm, comprising: 5. The combustion device according to claim 1, 2, 3 or 4, wherein the notification device includes an audible sound generator. 6. The combustion apparatus according to claim 1, 2, 3, 4 or 5, wherein the exhaust system construction abnormality determination circuit does not issue the alarm signal in the construction abnormality determination mode. Outputting a pass notification signal and operating a construction pass notification device; 7. The combustion device according to claim 6, wherein the construction success notification device is the same notification device as the notification device for issuing the alarm, but an alarm issued when the alarm signal is received and the success notification. Combustion equipment, characterized in that the notification of acceptance issued when a signal is received has a different form. 8. The method of claim 1, 2, 3, 4, 5, 6, or 7.
The combustion system according to claim 1, wherein the exhaust system construction abnormality determination circuit terminates the construction abnormality determination mode when the warning signal is not issued under the construction abnormality determination mode, and causes the combustion equipment to operate normally. Attaching to operating mode;
Combustion equipment characterized by. 9. The combustion device according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the test start signal generating means is a test incorporated in the exhaust system construction abnormality determination circuit. A circuit including a switch, which is a circuit that generates the test start signal by manually operating the test switch. 10. The combustion device according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the test start signal generating means is provided with the exhaust system through a test start signal transmission connector. A combustor, which is a portable device that is detachably connected to the abnormality determination circuit and that has a test switch and that generates the test start signal by manually operating the test switch. 11. The combustion apparatus according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the test start signal generating means includes a transmitter circuit and a test switch, and the test switch. The transmission circuit transmits a modulation test start signal modulated by being placed on a radio frequency or a light wave by a manual operation, and the reception circuit connected to the exhaust system construction abnormality determination circuit receives and demodulates the modulation test start signal. A combusting device characterized by being a portable device using a test start signal. 12. The combustion apparatus according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the test start signal generating means detects the power-on and automatically performs the test. Combustion equipment having a power-on detection circuit for generating a start signal.