JP2006090675A - Controller for hot air type heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller for a hot air type heater providing easy confirmation to a user of what warning has been sent even when a state of combustion flame recovers naturally after carrying out warning sound signaling calling attention that the state of the combustion flame is deteriorating. <P>SOLUTION: A control means 8 is provided for continuing display prompting ventilation in a ventilation lamp 5a provided in an operation display part 5 while a flame current value detected by a flame current detecting means 4 for detecting a flame current flowing between a burner 2 and a flame rod 3 via the combustion flame is less than a predetermined current value, outputting a warning sound prompting ventilation by a sound signaling means 6 for a predetermined time every predetermined timing, and continuing the display prompting ventilation in the ventilation lamp 5a even when the flame current recovers to the predetermined current value or more until a predetermined time passes from a start of the warning sound signaling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a control device for a hot air heater such as an oil fan heater.

  In general, indoor open-type hot air heaters such as oil fan heaters use indoor air as combustion air, so if they continue to burn for a long time in a sealed room, the oxygen concentration in the room will decrease, and this is accompanied by a combustion flame If this condition continues to worsen, and combustion continues in the same state, carbon monoxide may be generated and harm to human life may occur.

  Therefore, in this type of hot air heater, a current value (hereinafter referred to as a flame current value) flowing through the combustion flame correlated with the state of the combustion flame is detected, and this flame current value is less than a predetermined current value. Then, combustion is stopped in a state where the oxygen concentration in the room is deficient (see, for example, Patent Document 1).

JP-A-6-26644 (second page, FIG. 4)

  However, in the above method, if the oxygen concentration in the room is deficient, the combustion is stopped against the user's will, so that it is very inconvenient. Therefore, an oxygen deficiency warning current value (for example, a flame current value determined to have an oxygen concentration of about 19%) higher than the oxygen deficiency abnormal current value is set, and the flame current value flowing through the combustion flame is the oxygen deficiency warning current. When the value is less than the value, a warning display in the absence of oxygen is displayed to the user, and at the same time, a warning sound for a predetermined time (for example, a buzzer sound for 8 seconds) is notified at a predetermined timing.

  By this method, when the oxygen concentration in the room is deficient and the flame current value becomes less than the oxygen deficiency warning current value, usually the user first gives a warning by listening to the warning sound from the hot air heater. Knowing this, and then looking at the hot air heater, it can be seen that a warning display indicating an oxygen deficiency state is being made, so this confirms that the room is in an oxygen deficiency state. And if the room is ventilated by the user and the flame current value recovers above the oxygen deficiency warning current value, the hot air heater can stop the oxygen deficiency warning display and continue combustion Become.

  On the other hand, the indoor environment is changing every moment, for example, when a draft is introduced, the oxygen concentration is constantly changing naturally without human intervention. In addition, the warm air heater does not directly measure the oxygen concentration, but indirectly measures the flame current value that correlates with the oxygen concentration. It is influenced by the change factor of the flame current value. In other words, even if the flame current value becomes less than the oxygen deficiency warning current value due to a change in the indoor environment, the flame current value may recover to the oxygen deficiency warning current value or higher at an unexpected timing. It can occur naturally without intervention.

  Then, the natural recovery of the flame current value is immediately after the start of the warning sound prompting that the flame current value is less than the oxygen deficiency warning current value, and the user who has heard the warning sound If the user sees the hot air heater, the oxygen deficiency warning display has already stopped and the user has confirmed that the ventilation warning has been issued. There was a problem that it could not be confirmed.

  Also, if the time from listening to the user's warning sound until the hot air heater is viewed becomes longer, it will give more opportunities for natural recovery of the flame current value. In the case of, there was a problem that the possibility of confirming that the warning of ventilation was performed was reduced.

  The present invention solves the problems as described above, and the natural recovery of the flame current value is immediately after the start of the warning sound that prompts the flame current value to be less than the oxygen deficiency warning current value, And even if it occurs before the user who listens to the warning sound sees the hot air heater, the user can easily confirm that the ventilation warning has been given. The purpose is to provide.

  Also, for example, even if the user cannot take his / her hand, etc., it may take a long time to hear the warning sound and look at the hot air heater. It aims at providing the control apparatus of the warm air heater which can be confirmed to.

  The control device for a hot air heater according to the present invention detects a burner that burns fuel, a frame rod disposed in the vicinity of the burner, and a flame current that flows between the burner and the frame rod via a combustion flame. Flame current detection means, ventilation display means for prompting the user to ventilate, sound notification means for generating a confirmation sound or warning sound, etc., and warning sound notification for prompting the user to ventilate is started by this sound notification means While the flame current value detected by the time counting means and the flame current detection means is less than a predetermined current value, the ventilation display means continues to display ventilation prompting and has a predetermined timing. Each time the sound notification means is informed of a warning sound for ventilation for a certain period of time, and the ventilation display means is urged to ventilate even if the flame current value recovers above a predetermined current value until the time counting means counts up. It is obtained by a control means to continue shown.

  According to the present invention, until the predetermined time has elapsed from the start of the warning sound notification, even if the flame current value recovers to the predetermined current value or more, the ventilation display means continues to display the ventilation prompting. The natural recovery of the flame current value is immediately after the start of the warning sound prompting that the flame current value is less than the oxygen deficiency warning current value, and the user who has heard the warning sound looks at the hot air heater Even if it occurs in the meantime, the user can easily confirm that the warning of ventilation has been performed, and the user will not feel uneasy.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram of a control device for a warm air heater showing Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of an operation display unit of the warm air heater showing Embodiment 1 of the present invention.

  In the figure, 1 is a main body of a warm air heater, 2 is a burner as a heat source, 3 is a frame rod disposed in the vicinity of the burner 2, and 4 is a combustion flame between the burner 2 and the frame rod 3. Flame current detection means 5 for detecting the flowing flame current value If is an operation display section of the hot air heater. This operation display section 5 is a ventilation lamp indicating the state of the flame current value If detected by the flame current detection means 4. It is comprised from the indicator which displays the combustion state etc. of the burner 2 containing 5a, and the some switch which performs various settings. Further, 6 is a sound notification means for generating a confirmation sound when the various switches of the operation display unit 5 are pressed, a warning sound of the hot air heater, etc., and 7 is a time from the start of warning sound notification by the sound notification means 6. A time measuring means 8 for measuring the combustion time in the burner 2 and the display of the operation display section 5 in accordance with a program stored in advance based on detection signals from the flame current detection means 4 and various switch operations in the operation display section 5; It is a control means which controls the whole warm air heater.

  Next, the operation of the first embodiment will be described with reference to FIG.

  FIG. 3 is a flowchart of the control operation of the hot air heater showing Embodiment 1 of the present invention.

  In FIG. 3, during the combustion of the hot air heater, the flame current value If detected by the flame current detection means 4 is always input to the control means 8, and the control means 8 receives the flame current value If input in advance. When it becomes less than the predetermined oxygen deficiency warning current value If1 (step 10), the ventilation lamp 5a of the operation display unit 5 blinks (step 11). Further, at every predetermined timing (for example, the timing immediately after the ventilation lamp 5a starts blinking and the timing every 15 minutes thereafter) that does not make the user feel bothersome (step 12) A warning sound is notified by the notification means 6 (step 13), and counting of the time measuring means 7 is started from the start timing of the warning sound notification (step 14). Thereafter, when the flame current value If further decreases and becomes less than a predetermined oxygen deficiency abnormal current value If2 (step 15), the ventilation lamp 5a is turned on (step 16), and the hot air heater Is stopped (step 17). In addition, when the flame current value If becomes less than the oxygen deficiency warning current value If1 and then recovers to the oxygen deficiency warning current value If1 artificially or naturally (step 10), the time counting means 7 counts up. If yes (step 18), the ventilation lamp 5a is turned off (step 20). If not counted up (step 18), the ventilation lamp 5a continues to flash until counted up (for example, 30 seconds). (Step 19).

  As described above, according to the first embodiment of the present invention, when the flame current value If detected by the flame current detection means 4 is less than the oxygen deficiency warning current value If1, the ventilation lamp 5a of the operation display unit 5 is turned on. In addition to blinking, a warning sound is notified by the sound notification means 6 at every predetermined timing, and the flame current value If recovers to the oxygen deficiency warning current value If1 or more until a predetermined time elapses from the start of the warning sound notification. However, since the ventilation lamp 5a continues to blink, the flame current value If recovers to the oxygen deficiency warning current value If1 or more before the user who has heard the warning sound notices looks at the hot air heater. Even so, the user can see the blinking of the ventilation lamp 5a, and can easily confirm that the ventilation warning has been given.

Embodiment 2. FIG.
Embodiment 2 of the present invention will be described below with reference to the drawings.

  FIG. 4 is an enlarged view of the operation display unit of the hot air heater showing Embodiment 2 of the present invention.

  In FIG. 4, 5b is provided in the operation display unit 5 of the hot air heater. The display for prompting ventilation by the ventilation lamp 5a also provided in the operation display unit 5 is temporarily stopped, and the flame current detecting means is again provided. 4 is a ventilation re-detection switch for starting flame current detection by 4. In addition, the block diagram of the control device for the hot air heater is the same as the configuration of FIG.

  Next, the operation of the second embodiment will be described with reference to FIG.

  FIG. 5 is a flowchart of the control operation of the hot air heater showing Embodiment 2 of the present invention.

  In FIG. 5, during the combustion of the hot air heater, the flame current value If detected by the flame current detection means 4 is always input to the control means 8, and the control means 8 receives the flame current value If input in advance. When it becomes less than the predetermined oxygen deficiency warning current value If1 (step 10), the ventilation lamp 5a of the operation display unit 5 blinks (step 11), and the user is not inconvenienced in advance. At every predetermined timing (for example, the timing immediately after the ventilation lamp 5a starts blinking and the timing every 15 minutes thereafter) (step 12), the sound notification means 6 notifies the warning sound (step 13). . Thereafter, when the flame current value If further decreases and becomes less than a predetermined oxygen deficiency abnormal current value If2 (step 15), the ventilation lamp 5a is turned on (step 16), and the hot air heater Is stopped (step 17). In addition, once the flame current value If becomes less than the oxygen deficiency warning current value If1 and then recovers to the oxygen deficiency warning current value If1 artificially or naturally (step 10), the ventilation re-detection switch 5b is pressed. (Step 22), the ventilation lamp 5a continues to blink (step 23). When the ventilation redetection switch 5b is pressed (step 22), the ventilation lamp 5b is turned off (step 24). Step 21 is a determination process provided to accept the operation (step 22) of the ventilation re-detection switch 5b only while the ventilation lamp 5a is blinking.

  As described above, according to the second embodiment of the present invention, when the flame current value If detected by the flame current detection means 4 is less than the oxygen deficiency warning current value If1, the ventilation lamp 5a of the operation display unit 5 is turned on. At the same time, the sound notification means 6 notifies the warning sound and once the ventilation lamp 5a starts to flash, even if the flame current value If recovers to the oxygen deficiency warning current value If1 or more, ventilation is performed. The ventilation lamp 5a continues to blink until the re-detection switch 5b is pressed. That is, once the ventilation lamp starts blinking, the user cannot watch the ventilation lamp 5a turn off unless he / she consciously presses the ventilation re-detection switch 5b by watching the blinking of the ventilation lamp 5a. The user who has listened to will absolutely see the blinking of the ventilation lamp 5a and can always confirm that the ventilation warning has been given.

The block diagram of the control apparatus of the warm air heater which shows Embodiment 1 of this invention. The enlarged view of the operation display part of the warm air heater which shows Embodiment 1 of this invention. The flowchart of the control action of the warm air heater which shows Embodiment 1 of this invention. The enlarged view of the operation display part of the warm air heater which shows Embodiment 2 of this invention. The flowchart of the control action of the warm air heater which shows Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Burner 3 Frame rod 4 Flame current detection means 5 Operation display part 5a Ventilation lamp 5a Ventilation re-detection switch 6 Sound notification means 7 Timing means 8 Control means F Combustion flame

Claims (2)

A burner for burning fuel, a flame rod disposed in the vicinity of the burner, flame current detection means for detecting a flame current flowing between the burner and the flame rod via a combustion flame, and ventilation for the user A ventilation display means for urging, a sound notification means for emitting a confirmation sound, a warning sound, etc., a timing means for counting the time since the warning sound notification for urging the user to ventilate is started by the sound notification means, and the flame current While the flame current value detected by the detection means is less than the predetermined current value, the display for prompting ventilation is continued on the ventilation display means and the warning sound for prompting ventilation to the sound notification means at every predetermined timing. Control means for continuing a display for prompting ventilation on the ventilation display means even if the flame current value recovers to a predetermined current value or more until the time counting means counts up. Controller of the warm air heater, characterized in that. A burner for burning fuel, a flame rod disposed in the vicinity of the burner, flame current detection means for detecting a flame current flowing between the burner and the flame rod via a combustion flame, and ventilation for the user The ventilation display means for prompting, the ventilation prompting display by the ventilation display means are temporarily stopped, and a ventilation redetection switch for starting flame current detection by the flame current detection means again, and a confirmation sound, a warning sound, etc. While the flame current value detected by the sound notification means and the flame current detection means is less than the predetermined current value, the ventilation display means continues to display ventilation prompting and the sound at every predetermined timing. A warning sound for prompting ventilation is notified to the notification means for a certain period of time, and the ventilation display means is ventilated even if the flame current value recovers to a predetermined current value or more until the ventilation re-detection switch is operated. Controller of the warm air heater, characterized in that a control means to continue the display prompting.

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