KR100500554B1 - Combustion apparatus - Google Patents

Abstract

The present invention relates to a combustion apparatus, comprising a burner, means for igniting the burner, means for controlling the ignition means, and an automatic return switch connected to the control means. The control means determines whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and when the switch is ON, the ignition means is operated without turning the ignition means. The user turns on the switch for a short time. When the switch is turned on after a predetermined time, it can be determined that the switch is not turned on by the user. The combustion apparatus described above is controlled as described above, and is safe because the ignition is not started when the switch is not turned on by the user's operation. Therefore, it is possible to provide a safe combustion device even when the automatic return type switch is turned ON without the user's operation.

Description

Combustion apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device, and more particularly to a combustion device in which a user starts an ignition operation by turning on an automatic return type switch. The present invention relates to a technique for securing safety by preventing the disclosure.

Background Art Conventionally, a combustion apparatus is known in which a user starts an combustion operation by operating an ignition operation by turning on an automatic return type switch. Here, the ignition operation refers to an operation in which gas is supplied to the burner while the ignition electrode generates sparks.

The auto reset switch turns on when the user presses it and turns off when the user stops pressing it. The automatic return type switch can be operated lightly and is excellent in operation feeling because the stroke is zero or small.

On the other hand, the automatic return type switch is turned ON by placing an object thereon, and the switch substrate may be electrically shorted to turn ON. If the automatic return type switch is used for initiating the ignition operation of the combustion device, it can be conveniently operated, but there is a possibility that the ignition operation can be started even if the user does not operate it.

In order to cope with this problem, conventionally, the ignition operation is started when the auto-return switch is turned on, while the switch is turned on and off after a predetermined time after the switch is turned on. In the case of OFF, a combustion apparatus is known which continues the ignition operation.

In this case, when the automatic return type switch is ON and OFF discrimination, the ignition has already been completed and the combustion operation is started, and when the determination result of the switch is ON, the combustion operation is terminated. If it is OFF when the automatic return switch is turned on or off, the combustion operation continues.

This technique uses the fact that the time for the user to turn on the automatic return switch is a short time. That is, when the switch is turned on for a predetermined time, it is not because of the user's manipulation, but it is judged that the switch is turned on because an object is placed on the switch or an electrical short occurs, and the ignition operation is stopped. To ensure safety, or to terminate the combustion operation.

However, since the combustion device starts the ignition operation when the automatic return switch is turned on, and then stops the ignition operation or the combustion operation if necessary after a predetermined time has elapsed, an object is placed on the switch. Even if an electrical short occurs or an electrical short occurs, the ignition operation is started (in some cases, the combustion operation may be successively performed), and there is a problem that the ignition operation or the combustion operation is subsequently stopped.

The present invention was devised to solve the related problems,

An object of the present invention is to provide a combustion device that is safe even if the automatic return type switch is turned on without user's operation.

A combustion apparatus according to the present invention for achieving the above object includes a burner, means for igniting the burner, means for controlling the ignition means, and an automatic return switch connected to the control means. The control means of the present invention is characterized by determining whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and when the switch is ON, the ignition means is operated when the switch is OFF.

The control means of the combustion apparatus determines whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and if it is ON, does not ignite not being operated by the user. On the other hand, when it is OFF, the user ignites as operated. Since the control is performed in this way, if the switch is not turned on by the user's operation, the ignition is not performed, so it is safe.

In addition, the combustion apparatus according to the present invention includes a burner, means for igniting the burner, means for controlling the ignition means, an automatic return switch connected to the control means, and means for confirming whether the ignition is safe even if the ignition is started. Equipped with. The checking means of the present invention starts operation when the switch is turned on. The control means determines whether the switch is turned on or off within a predetermined time after the confirmation operation by the confirmation means is finished, and when the switch is ON, the ignition means is not operated, and when it is OFF, the ignition means is operated. In such a configuration, since safety is ensured even after the ignition is confirmed, the safety is further secured.

On the other hand, the combustion apparatus includes a burner, means for igniting the burner, means for controlling the ignition means, an automatic return switch connected to the control means, and means for confirming whether the ignition is safe even if the ignition is started. Doing. The checking means is started when the switch is turned on, and the checking operation is completed after a predetermined time has elapsed since the switch is turned on. The control means determines whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and before the end of the checking operation by the checking means. When the switch is ON, the control means operates the ignition means even if the checking by the checking means ends. If it is OFF, the ignition means is operated at the end of the confirmation work by the confirmation means.

In this way, the confirmation of whether the switch is ON or OFF and the safety confirmation can be performed at the same time, so that the time from when the switch is turned ON until the ignition is performed can be shortened.

In the combustion apparatus, it is preferable that an informing means for informing that the ignition operation is not started is added.

With this configuration, the user can confirm that the combustion apparatus is operating normally even if the ignition is not performed immediately after the switch is turned ON and combustion is not started.

Here, the combustion apparatus includes a burner, a valve for opening and closing the supply of gas to the burner, control means for controlling the valve, and an automatic return switch connected to the control means. The control means discriminates the on / off of the switch after a predetermined time after the switch is turned on. If the switch is turned on, the control means is left closed and the valve is opened when the switch is turned off.

In such a configuration, when the switch is not turned on by the user's operation, since the valve is closed, no gas is supplied to the burner, and combustion is not started.

The combustion apparatus includes a burner, a valve for opening and closing the supply of gas to the burner, a control means for controlling the valve, an automatic return switch connected to the control means, and whether it is safe to open the valve. Confirmation means for confirming is provided. Confirmation means starts operation when the switch is turned on. The control means determines whether the switch is turned on or off within a predetermined time after the checking operation by the checking means is completed, and when the switch is ON, the valve is kept closed and the valve is opened.

In such a configuration, safety is ensured even if the valve is opened to supply gas to the burner.

Further, an ignition means controlled by the control means to ignite the burner is further added, and the control means preferably operates the ignition means when the switch is OFF.

In this way, when the switch is turned on, when the ignition operation is operated, the ignition is surely performed at the time when the valve is opened.

It is preferable to further add a notification means for informing that the valve is not open.

With this configuration, the user can confirm that the combustion device is operating normally even if combustion is not started immediately after switching off.

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

<1st embodiment>

A first embodiment in which the combustion apparatus of the present invention is applied to a gas air conditioner 10 will be described with reference to FIGS. 1 to 6.

As shown in Fig. 1 and Fig. 2, a casing 12 made of a metal plate, a resin, or the like is provided on the outer side of the gas warm air heater 10. As shown in FIG. 2, an indoor air inlet 14 through which the indoor air can be blown and a combustion air inlet 16 through which the combustion air is sucked are opened at the rear side of the gas warm air heater 10. have. The indoor air intake 14 and the combustion air intake 16 are covered by a dustproof filter 19 that is detachably attached to the casing 12. The gas hot air heater 10 is further supplied with gas and electric power through a gas hose 22 connected to the rear bottom and an electric cord (not shown).

In the lower part of the front side of the gas-heated air heater 10, as shown in FIG. 1, the hot air outlet 15 which blows out warm air is opened. In addition, an operation panel 17 is provided on the upper surface of the gas air conditioner 10. The operation panel 17 is equipped with an indicator and a plurality of switches for operating the gas warm air heater 10 (these indicators and switches will be described later in detail).

The structure of the gas hot air heater 10 is demonstrated. As shown in FIG. 3, the indoor air intake 14 and the hot air blowout 15 are communicated by the air blowing duct 32. A blower fan 34 of a line flow type that is rotationally driven by the electric motor 36 is mounted upstream of the hot air blower outlet 15 (upstream of the indoor air blower outlet 14 and the hot air blower outlet 15 side). Downstream). The electric motor 36 is attached with the rotation speed sensor 35 which detects the rotation speed. And the thermistor type room temperature sensor 51 which detects room temperature is attached directly downstream of the indoor air intake opening 14. As shown in FIG.

The burner 39 is provided upstream of the blowing fan 34. The burner 39 is composed of a combustion cylinder 38, a combustion plate 37 having a plurality of through holes provided therein, and a cover 31 disposed upstream of the combustion plate 37. It is. In the vicinity of the combustion plate 37, a thermocouple 43 for detecting the presence of a combustion flame and an ignition electrode 42 for igniting a mixture of air and gas are mounted. The electric motor 36, the rotational speed sensor 35, the room temperature sensor 51, and the ignition electrode 42 are electrically connected to the controller 62 described in detail later. The duct 44 communicates the combustion air intake 16 with the combustion cylinder 38 of the burner 39, and a diameter reduction portion 44a is formed therein.

In the gas supply pipe 46 mounted downstream of the gas hose 22, two electromagnetic opening and closing valves 47 and 48 and an electromagnetic proportional valve 49 are provided in order from the upstream side. The electromagnetic opening and closing valves 47 and 48 and the electromagnetic proportional valve 49 are connected to the controller 62. The solenoid valve 47, 48 is an on / off valve incorporating a solenoid, and is open when the energization is conducted, and when the energization is stopped, the valve is closed to prevent the distribution of gas. The electromagnetic proportional valve 49 is a proportional valve of a type in which the opening degree increases with increasing conduction current, and has a characteristic in which the conduction current is proportional to the gas flow rate.

The nozzle 46a formed at the tip of the gas supply pipe 46 is inserted into and fixed to the diameter reducing portion 44a of the duct 44.

The operation panel 17 includes an operation switch 54, a room temperature setting switch 55, and a liquid crystal display 56. The operation switch 54, the room temperature setting switch 55, and the liquid crystal display 56 are connected to the controller 62. The operation switch 54 is an automatic return type, and is ON when the user presses it, and when it removes the pressed force, it returns to an original position and turns OFF. The room temperature setting switch 55 is a switch for setting the room temperature at which the gas hot air heater 10 heats, and the temperature can be set by 1 ° C. The liquid crystal panel 56 displays information such as the temperature set by the room temperature setting switch 55 and the operation status of the gas hot air heater 10.

The controller 62 shown in FIG. 4 is a digital controller which processes signals input by the built-in CPU, memory, etc. according to a predetermined control program and outputs control signals. The controller 62 incorporates a combustion control unit 62a, a fan control unit 62b, and a safety confirmation / timer unit 62c. The combustion control unit 62a, the fan control unit 62b, and the safety confirmation / timer unit 62c communicate with each other to transmit information necessary for the internal processing thereof. The controller 62 receives signals from the operation switch 54, the room temperature setting switch 55, the room temperature sensor 51, the rotational speed sensor 35, and the thermocouple 43, and the electromagnetic open / close valves 47 and 48. The control signal is output to the electromagnetic proportional valve 49, the ignition electrode 42, and the electric motor 36.

The combustion control unit 62a of the controller 62 is based on an indication signal from the operation switch 54 and the room temperature setting switch 55 and a detection signal from the room temperature sensor 51 and the thermocouple 43. 48, combustion control of the burner 39 is performed by controlling the electromagnetic proportional valve 49 and the ignition electrode 42. The fan control unit 62b uses an electric motor based on an indication signal from the operation switch 54 and the room temperature setting switch 55 and detection signals from the room temperature sensor 51 and the thermocouple 43 and the rotation speed sensor 35. Control the number of revolutions.

The safety confirmation / timer portion 62c is a safety switch that checks the function of the blower fan 34 and the thermocouple 43 before starting ignition, and the operation switch from the relationship between the timing at which the operation switch is turned OFF and the time of the timer. It is judged whether ON of 54 is by the user.

The operation when the ignition is not started because the operation switch 54 of the gas warm air heater 10 is operated or an abnormality is detected will be described using the flowchart of FIG. 5.

When the operation switch 54 is turned on (S14), as shown in Fig. 5, the controller 62 receives the signal, and the safety confirmation / timer section 62c starts the electric motor 36 and the thermocouple. The safety check is started by executing the output check (S18). The starting check of the electric motor 36 is performed by sending an operation signal to the electric motor 36 and confirming that the rotation speed of the electric motor 36 detected by the rotation speed sensor 35 is equal to or larger than a predetermined value. The starting check of the electric motor 36 is carried out in conjunction with a purge operation which ventilates the inside of the blowing duct 32 before the ignition starts and prevents the convection of gas in case. The output check of the thermocouple 43 is performed by confirming that the output voltage of the thermocouple 43 is in the predetermined range corresponding to the temperature inside the combustion cylinder 38 assumed before combustion commences.

These safety checks are performed by inputting simulated signals to the combustion control section 62a, the fan control section 62b, and the safety check / timer section 62c, and checking that the output signals of the processed results are predetermined. You may make sure that it is normal.

Subsequently, in S22, it is determined whether the safety check has been completed. If the safety check is not completed (No), wait until the safety check finishes. If the safety check has ended (in the case of the example), the flow proceeds to S26. In S26, a timer for determining whether the operation of the operation switch 54 is performed by the user is started. Subsequently, in S30, it is determined whether the operation switch 54 is ON or OFF. If the operation switch 54 is ON (No), the routine advances to S34 and determines whether 15 seconds have elapsed since the start of the timer. If it is determined in S34 that 15 seconds have not elapsed (No), the process returns to the processing before S30.

The time from when the user turns the operation switch 54 ON to remove the pressing force and turns it OFF is a short time. Therefore, in S34, when it is determined that the driving switch 54 is turned ON even after 15 seconds have elapsed, the operation is not turned ON by the user's operation, but the object is placed on the driving switch 54 and turned ON. Or it can be determined that an electrical short has occurred.

Therefore, when it is determined in S34 that the switch is ON after 15 seconds has elapsed (in the case of the example), the process proceeds to S38 and the liquid crystal display 57 of the operation panel 17 performs abnormal display.

In addition, it is possible to configure the display to return to the abnormal stop state without performing abnormal display.

Even when it is determined that the operation switch 54 is not turned ON by the user's operation, it can be configured so that this is not stored as an error history in the memory of the controller 62. This is to prevent the error history which should be left inherent by the misoperation overlapping and disappearing because the user may perform misoperation which continues to press the operation switch 54.

In S30, when it is determined that the operation switch 54 is OFF, the ignition electrode 42 generates a spark in S42, and in S46, the solenoid opening and closing valves 47 and 48 and the electromagnetic proportional valve 49 are opened. This ignites the gas and air mixer and starts the combustion operation.

Further, even when the operation switch 54 is determined to be OFF in S30, the operations of S42 and S46 are not performed immediately, but can be configured to be performed after 15 seconds have elapsed since the start of the timer. The display of the "safety confirmation timer" is performed on the liquid crystal display 57 of the operation panel 17 after the operation switch 54 is turned ON until ignition is started. By the display being performed, the user can confirm that the safety confirmation and the timer operation are being performed, and thus, it is possible to prevent the user from feeling stress having a suspicion that the gas hot air heater 10 is broken.

Referring to the timing chart of FIG. 6, how the start point of the ignition changes according to the timing at which the operation switch 54 is turned off when operating according to the flowchart of FIG. 5 described above will be described. In Fig. 6, in three phenomena (development 1, development 2, development 3) having different timings at which the operation switch is turned off, the ON / OFF, ignition and combustion states of the operation switch 54 are shown for each phenomenon. 6, time passes from the left to the right.

Phenomenon 1

The operation switch 54 which is turned ON is turned off before the safety confirmation ends. Even if the operation switch 54 is turned off before the end of the safety check, the ignition is not immediately started, and the ignition is started after the end of the safety check.

In the combustion operation, the electric motor 36 operates, the energized ignition electrode 42 generates sparks, and the electromagnetic opening / closing valves 47 and 48 and the electromagnetic proportional valve 49 are opened to burn the combustion cylinder 38. The inside is started by supplying a mixture of gas and air and igniting the mixer.

Phenomenon 2

The operation switch 54 is turned off within the timer time (within 15 seconds after the timer starts). When the operation switch 54 is turned off within the timer time, the ignition starts from the time when the operation switch 54 is turned off, and the combustion operation is performed.

Phenomena 3

The operation switch 54 is turned OFF after the timer time has elapsed. In this case, ignition is not started and abnormal display is performed. Therefore, the combustion operation is not executed.

The operation after commencement of the combustion operation of the gas hot air heater 10 will be described. During the combustion operation, it is controlled by the controller 62, the electric motor 36 is rotated, the electromagnetic opening and closing valves 47 and 48 are opened, and the gas supply amount is adjusted by the electromagnetic proportional valve 49. When the electric motor 36 is rotated, the blowing fan 34 driven therein also rotates, and the indoor air is sucked into the blowing duct 32 from the indoor air intake opening 14, and the surroundings of the burner 39 are rotated. Flows. When air flows around the burner 39, the cover 31 is installed, so that the pressure inside the combustion cylinder 38 becomes a negative pressure, and the indoor air passes through the duct 44 to the interior of the combustion cylinder 38. Is inhaled. When the electromagnetic open / close valves 47 and 48 are opened, and the electromagnetic proportional valve 49 adjusts the gas supply amount, the gas is ejected into the duct 44 from the nozzle 46a of the gas supply pipe 46 and is sucked indoors. Mixed with air. The mixed air and gas are burned in the combustion cylinder 38, and the warm air starts to blow from the hot air outlet 15 to heat the room. The controller 62 adjusts the rotational speed of the electric motor 36 and the opening degree of the electromagnetic proportional valve 49 based on the input signals from the room temperature setting switch 55 and the room temperature sensor 51. Control the temperature appropriately.

In addition, when the output value of the thermocouple 42 is below a predetermined voltage, the controller 62 determines that combustion is not performed due to lack of oxygen or misfire, and closes the solenoid opening and closing valves 47 and 48 and the electromagnetic proportionality valve 49. Extinguishing control is executed.

When the operation switch 54 is turned on during the combustion operation, it is controlled by the controller 62 to close the electromagnetic open / close valves 47 and 48 and the electromagnetic proportionality valve 49, and stop the electric motor 36. Operation of the heater 10 is stopped.

<2nd embodiment>

A second embodiment of the present invention will be described with reference to FIGS. 7 and 8. In addition, the description which overlaps with 1st Embodiment is abbreviate | omitted.

This second embodiment is different from the first embodiment, and the determination of whether the operation switch 54 is ON or OFF is performed before the safety confirmation ends. This operation will be described using the flowchart of FIG.

When the operation switch 54 is turned ON (S52), the safety check is started in S56, and then the determination timer of whether the operation of the operation switch 54 is performed by the user in S60 is started. In S64, it is determined whether the operation switch 54 is ON or OFF. If it is determined in S64 that the operation switch 54 is ON (No), the routine advances to S66 and determines whether or not 15 seconds have elapsed since the start of the timer. If it is determined in S66 that 15 seconds have not elapsed (No), the process returns to the processing before S64.

If it is determined in S66 that 15 seconds have elapsed (in the case of the example), the operation switch 54 is turned ON even after 15 seconds after being turned ON, and an object is placed on the operation switch 54 to be turned ON or is electrically It can be judged that a short is occurring. Therefore, in the case where it is determined that 15 seconds have elapsed in S66 (in the case of the example), the process proceeds to S70 and abnormal display is performed on the liquid crystal display 57 of the operation panel 17.

If it is determined in S64 that the operation switch 54 is OFF (in the case of the example), it proceeds to S74 to determine whether the safety check has been completed. If the safety check has not been completed in S74 (No), it waits until the safety check finishes. If the safety confirmation has ended (in the case of the example), S78 is continued. In S78, the ignition electrode 42 is operated to generate sparks, and in S82, the electromagnetic opening and closing valves 47 and 48 and the electromagnetic bypass valve 49 are opened to ignite the gas and air mixer to start the combustion operation. do.

When the operation according to the above-described flow chart (Fig. 7) is performed, how the start point of ignition changes according to the timing at which the operation switch 54 is turned off will be explained using the phenomenon 4 to phenomenon 6 shown in Fig. 8 as the timing chart. do.

Phenomena 4

The operation switch 54 which is turned on is turned off within the timer time. Even if the operation switch 54 is turned off within the timer time, the ignition is not immediately started, but is started after the safety check ends.

<Phenomena 5>

The operation switch 54 is turned off until the end of the safety check while the timer time expires. In this case, ignition is not started, and abnormal display is performed. Therefore, the combustion operation is not executed.

Phenomena 6

The operation switch 54 is turned OFF after the safety confirmation ends. In this case, ignition is not started similarly to the above phenomenon 5, and abnormal display is performed. Therefore, the combustion operation is not executed.

Third Embodiment

A third embodiment of the present invention will be described with reference to FIGS. 9 and 10. In addition, the description which overlaps with 1st Embodiment is abbreviate | omitted.

In the third embodiment, the operation and safety confirmation of the ignition electrode 42 are performed when the operation switch 54 is turned on, and the ignition electrode 42 is operated when the safety check is completed. Then, it is determined whether the operation switch 54 is ON or OFF within a predetermined time after the safety check is completed. In the case of ON, the solenoid opening and closing valves 47 and 48 and the electromagnetic proportionality valve 49 remain closed. . Here, for safety confirmation, for example, a simulated signal is inputted to the combustion control unit 62a, the fan control unit 62b, and the safety confirmation / timer unit 62c, and the output signal of the processed result is checked. This ensures that their function is normal.

The operation of the combustion apparatus of the third embodiment will be described with reference to the flowchart of FIG. 9. When the operation switch 54 is turned on (S110), the safety check is started at S118, and then the ignition electrode 42 is operated at S120. That is, when the operation switch 54 is turned ON, the start of safety confirmation and the operation of the ignition electrode 42 are performed. Subsequently, in S122, it is determined whether the safety check has been completed, and if the safety check has not been completed (No), the process waits until the end. If the safety check has been completed (YES), the routine proceeds to S128.

In S128, the timer for determining whether the operation of the operation switch 54 is performed by the user is started, and the process proceeds to S130. In S130, it is determined whether the operation switch 54 is ON or OFF. If it is determined in S130 that the operation switch 54 is ON (No), the flow advances to S134, and it is determined whether 15 seconds have elapsed since the start of the timer. If it is determined in S134 that 15 seconds have not elapsed (No), the process returns to the processing before S130. If it is determined in S134 that 15 seconds have elapsed (in the case of the example), the process proceeds to S138 and abnormal display is performed on the liquid crystal display 57 of the operation panel 17.

If it is determined in S130 that the operation switch 54 is OFF (in the case of the example), the solenoid opening and closing valves 47 and 48 and the electromagnetic proportionality valve 49 are opened in S146, and the gas and air mixture is transferred to the burner 39. Supplied. Since the ignition electrode 42 is operated and sparks are generated in S120, the ignition is performed on the gas-air mixture and the combustion operation is started.

In addition, between the operation switch 54 being turned on and the solenoid opening / closing valves 47 and 48 and the electromagnetic proportionality valve 49 being opened, the liquid crystal display 57 of the operation panel 17 indicates the 'safety confirmation / timer'. 'Is displayed.

When the operation is performed in accordance with the above-described flow chart (Fig. 9), how the start point of ignition is changed by the timing at which the operation switch 54 is turned off is used by using the phenomenon 7 to the phenomenon 9 shown in Fig. 10 as the timing chart. Explain.

Phenomena 7

The operation switch 54 which is turned ON is turned off before the safety confirmation ends. The ignition electrode 42 starts to operate when the operation switch is turned ON. In this case, when the safety check is completed, the electromagnetic shutoff valves 47 and 48 and the electromagnetic proportional valve 49 are opened, and the spark in which the ignition electrode 42 is generated ignites the gas and air mixer to perform combustion operation. This is disclosed.

Phenomena 8

The operation switch 54 is turned off within the timer time. In this case, when the operation switch 54 is turned off, the solenoid opening and closing valves 47 and 48 and the electromagnetic proportionality valve 49 are opened, and the combustion operation is started.

Phenomena 9

The operation switch 54 is turned OFF after the timer time elapses. In this case, the electromagnetic opening and closing valves 47 and 48 and the electromagnetic proportional valve 49 are not opened. Therefore, no combustion operation is performed.

As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. In the technology described in the claims, various modifications and changes to the specific examples described above are included.

In addition, the technical element described in this specification or drawing can show technical usability alone or in various combinations, and is not limited to the combination of the claim description at the time of application. In addition, the technique illustrated in this specification or drawing achieves a plurality of purposes simultaneously, and has technical utility in itself by achieving one of them.

Therefore, it can comprise, for example as described below.

(1) The notification that the ignition electrode 42 is not operating or that the electromagnetic open / close valves 47 and 48 and the electromagnetic proportionality valve 49 are not open is not necessarily limited to the display. For example, it may be based on melody and sound.

(2) The timer for checking safety and whether the operation switch is ON or OFF is started by turning on the operation switch, and checking whether the operation switch is ON or OFF within a predetermined time after the operation switch is turned ON after the safety confirmation is completed. You may comprise. With this arrangement, the safety confirmation and the confirmation of whether the switch is ON or OFF can be performed at the same time, so that the time from when the switch is turned ON to the start of the ignition operation can be shortened.

The combustion apparatus according to the present invention as described above has a burner, means for igniting the burner, means for controlling the ignition means, and an automatic return switch connected to the control means. The control means of the present invention is characterized by determining whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and when the switch is ON, the ignition means is operated when the switch is OFF.

The control means of the combustion apparatus determines whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and if it is ON, does not ignite not being operated by the user. On the other hand, when it is OFF, the user ignites as operated. Since the control is performed in this way, if the switch is not turned on by the user's operation, the ignition is not performed, so it is safe.

In addition, the combustion apparatus according to the present invention includes a burner, means for igniting the burner, means for controlling the ignition means, an automatic return switch connected to the control means, and means for confirming whether the ignition is safe even if the ignition is started. Equipped with. The checking means of the present invention starts operation when the switch is turned on. The control means determines whether the switch is turned on or off within a predetermined time after the confirmation operation by the confirmation means is finished, and when the switch is ON, the ignition means is not operated, and when it is OFF, the ignition means is operated. In such a configuration, since safety is ensured even after the ignition is confirmed, the safety is further secured.

On the other hand, the combustion apparatus includes a burner, means for igniting the burner, means for controlling the ignition means, an automatic return switch connected to the control means, and means for confirming whether the ignition is safe even if the ignition is started. Doing. The checking means is started when the switch is turned on, and the checking operation is completed after a predetermined time has elapsed since the switch is turned on. The control means determines whether the switch is ON or OFF after a predetermined time after the switch is turned ON, and before the end of the checking operation by the checking means. When the switch is ON, the control means operates the ignition means even if the checking by the checking means ends. If it is OFF, the ignition means is operated at the end of the confirmation work by the confirmation means.

In this way, the confirmation of whether the switch is ON or OFF and the safety confirmation can be performed at the same time, so that the time from when the switch is turned ON until the ignition is performed can be shortened.

In the combustion apparatus, it is preferable that an informing means for informing that the ignition operation is not started is added.

With this configuration, the user can confirm that the combustion apparatus is operating normally even if the ignition is not performed immediately after the switch is turned ON and combustion is not started.

Here, the combustion apparatus includes a burner, a valve for opening and closing the supply of gas to the burner, control means for controlling the valve, and an automatic return switch connected to the control means. The control means discriminates the on / off of the switch after a predetermined time after the switch is turned on. If the switch is turned on, the control means is left closed and the valve is opened when the switch is turned off.

In such a configuration, when the switch is not turned on by the user's operation, since the valve is closed, no gas is supplied to the burner, and combustion is not started.

The combustion apparatus includes a burner, a valve for opening and closing the supply of gas to the burner, a control means for controlling the valve, an automatic return switch connected to the control means, and whether it is safe to open the valve. Confirmation means for confirming is provided. Confirmation means starts operation when the switch is turned on. The control means determines whether the switch is turned on or off within a predetermined time after the checking operation by the checking means is completed, and when the switch is ON, the valve is kept closed and the valve is opened.

In such a configuration, safety is ensured even if the valve is opened to supply gas to the burner.

Further, an ignition means controlled by the control means to ignite the burner is further added, and the control means preferably operates the ignition means when the switch is OFF.

In this way, when the switch is turned on, when the ignition operation is operated, the ignition is surely performed at the time when the valve is opened.

It is preferable to further add a notification means for informing that the valve is not open.

With this configuration, the user can confirm that the combustion device is operating normally even if combustion is not started immediately after switching off.

1 is a perspective view of a front side of a gas warm air heater according to a first embodiment of the present invention;

2 is a perspective view of the rear side of the gas warm air heater according to the first embodiment of the present invention;

3 is a schematic view showing the internal structure of a gas warm air heater according to the first embodiment of the present invention;

4 is a schematic diagram showing an internal configuration of a controller according to the first embodiment of the present invention and a connection state between the controller and other components;

Fig. 5 is a flowchart from when the operation switch according to the first embodiment of the present invention is turned on until the ignition operation is started;

6 is a timing chart from when the operation switch according to the first embodiment of the present invention is turned on until the ignition operation is started;

Fig. 7 is a flowchart of the time from when the operation switch according to the second embodiment of the present invention is turned on until the ignition operation is started;

Fig. 8 is a timing chart from when the operation switch according to the second embodiment of the present invention is turned on until the ignition operation is started,

Fig. 9 is a flowchart from when the operation switch according to the third embodiment of the present invention is turned on until the ignition operation is started, and

10 is a timing chart from when the operation switch according to the third embodiment of the present invention is turned on until the ignition operation is started.

<Explanation of symbols for main parts of drawing>

10; Gas hot air heater 12; Casing

14; Indoor air intake 15; Hot air outlet

16; Combustion air intake 17; Control panel

19; Filter 22; Gas hose

31; Cover 32; Blowing duct

34; Blower fan 35; RPM sensor

36; Electric motor 37; Combustion Plate

38; Combustion copper 39; burner

42; Ignition electrode 43; thermocouple

44; Duct 44a; Diameter reduction part

46; Gas supply pipe 46a; Nozzle

47,48; Solenoid valve 49; Electronic proportional valve

51; Room temperature sensor 54; Operation switch

55; Room temperature setting switch 56; LCD display

62; Controller 62a; Combustion control unit

62b; Fan control unit 62c; Safety check / timer section

Claims (8)

A burner, an ignition means for igniting the burner, a control means for controlling the ignition means, and an automatic return switch connected to the control means, wherein the control means is provided a predetermined time after the switch is turned on. And the ignition means is operated when the switch is turned OFF and the ignition means is not operated when the switch is ON. A burner, means for igniting the burner, control means for controlling the ignition means, an automatic return switch connected to the control means, and confirmation means for confirming whether the ignition is safe by starting a predetermined function check. And the checking means starts operation when the switch is turned on, and the control means determines whether the switch is turned on or off within a predetermined time after the checking operation by the checking means ends, and the switch is turned on. And the ignition means is operated when it is OFF. A burner, an ignition means for igniting the burner, a control means for controlling the ignition means, an automatic return switch connected to the control means, and a confirmation means for confirming whether or not the ignition is safe by starting a predetermined function check. And the checking means starts operation when the switch is turned on, and the control means determines whether the switch is turned on or off before the end of the checking operation by the checking means after a predetermined time while the switch is turned on. And the ignition means is operated at the end of the confirmation operation by the confirmation means when the switch is ON, even if the confirmation by the confirmation means is completed. The method according to any one of claims 1 to 3, And a notifying means for notifying that the operation of the ignition means is not started. A burner, a valve for opening and closing the supply of gas to the burner, a control means for controlling the valve, and an automatic return switch connected to the control means, wherein the control means is provided after the switch is turned on. And the switch is discriminated after a predetermined time, the valve is closed when the switch is ON, and the valve is opened when the switch is OFF. Is it safe to open the valve by a burner, a valve for opening and closing the supply of gas to the burner, a control means for controlling the valve, an automatic return switch connected to the control means, and a predetermined function check It is provided with a confirmation means for confirming, the confirmation means starts operation when the switch is turned on, the control means determines the ON, OFF of the switch within a predetermined time after the confirmation operation by the confirmation means, And the valve is closed when the switch is ON, and the valve is opened when OFF. The method according to claim 5 or 6, And an ignition means controlled by the control means to ignite the burner, wherein the control means operates the ignition means when the switch is turned on. The method according to any one of claims 5 to 6, And a notifying means for notifying that the valve is not opened.