JP5145182B2 - Liquid fuel combustion equipment - Google Patents

Description

  The present invention relates to a liquid fuel combustion apparatus including an oil supply tank for supplying liquid fuel.

  Liquid fuel combustion devices such as oil fan heaters are detachably provided with a fuel tank for supplying liquid fuel. When the liquid fuel in the fuel tank decreases due to combustion, the fuel tank is removed from the main body. Then, liquid fuel is poured into the taken out fuel tank, and the fuel tank is attached to the main body to complete the fueling.

  In addition, a tank cap is provided at the tip of the fuel tank, but in the unlikely event that the tank cap is not completely installed, the tank cap may come off when the fuel tank is attached to or detached from the main body. There is. If the tank cap is removed, the fuel in the refueling tank will sprinkle on the equipment body and not only contaminate the equipment body and its surroundings, but also if it touches the burning combustion part, there is a risk of fire. Therefore, considering safety, it is necessary to stop combustion when refueling.

  In view of this, conventionally, a combustion apparatus has been devised that is provided with a means for detecting attachment / detachment of the fuel tank, and that is equipped with a safety device that automatically stops combustion when it is detected that the fuel tank has been removed. Yes.

By configuring as described above, the combustion is stopped by taking out the fuel tank without having to instruct to stop the operation every time fueling. Since it has stopped, even if the tank cap is removed, it will not cause a fire and it will be a combustion device with excellent safety.
JP 2000-9309 A

  However, it is conceivable that the means for detecting the attachment / detachment of the fuel tank breaks down for some reason, so that it is always determined that the fuel tank is present. In that case, the safety device does not work, and even if the fuel tank is removed, the combustion continues, but the user assumes that the combustion will stop if the fuel tank is removed. Without refueling.

  Further, even if this safety device fails, there is no problem with normal combustion, so there is a possibility that it will continue to be used without being recognized as a failure. In such a state, if an attempt is made to install the fuel tank without the tank cap being correctly attached, the tank cap will come off and the fuel will sprinkle on the burning equipment.

  An object of the present invention is to provide a liquid fuel combustion apparatus that can quickly detect a failure of a means for detecting attachment / detachment of a fuel tank and can be used safely.

  The present invention relates to an oil tank that is detachably accommodated in the main body, a tank detection means that detects whether the oil tank is accommodated in the main body, and a tank detection means that detects that the oil tank is not accommodated in the main body. In the combustion apparatus having a control unit for stopping combustion when the fuel consumption is detected, the control unit measures the amount of fuel consumed and stores the integrated value, and detects that the fuel tank is not accommodated in the main body. The liquid fuel combustion apparatus is characterized by initializing an integrated value and determining that the tank detection means is abnormal when the integrated value reaches a predetermined value.

  In addition, a refueling tank that is detachably accommodated in the main body, a tank detection means that detects whether the refueling tank is accommodated in the main body, and a tank detection means that detects that the refueling tank is not contained in the main body In the combustion apparatus having a control unit for stopping combustion, the control unit measures the combustion time and stores the integrated value, and when it is detected that the fuel tank is not accommodated in the main body, the integrated value is initialized. The liquid fuel combustion apparatus is characterized in that when the integrated value reaches a predetermined value, it is determined that the tank detection means is abnormal.

  3. The liquid fuel combustion according to claim 1 or 2, further comprising a display unit for displaying an operation state or the like, wherein when the tank detection unit is determined to be abnormal, the display unit displays an abnormality. Device.

  4. The liquid fuel combustion apparatus according to claim 1, further comprising a nonvolatile storage unit, wherein the control unit stores the integrated value in the nonvolatile storage unit. 5.

  The liquid fuel combustion apparatus according to any one of claims 1 to 4, wherein the control unit prohibits the subsequent operation when it is determined that the tank detection means is abnormal.

  6. The liquid according to claim 1, further comprising a weight sensor for detecting a weight of the fuel tank, wherein the predetermined value is changed according to a weight when the fuel tank is mounted on the main body. It is a fuel combustion device.

  By configuring as described above, it is possible to detect a failure of the means for detecting the attachment / detachment of the fuel tank, so that the combustion apparatus is excellent in safety in that combustion is always stopped during fueling.

  The preferred embodiment of the present invention will be briefly described by showing the operation of the present invention.

  The present invention is a liquid fuel combustion apparatus comprising tank detecting means for detecting whether or not a fuel tank is accommodated in the main body, and stopping combustion when it is detected that the fuel tank has been removed from the main body. Then, the consumption of liquid fuel from when the fuel tank is mounted to the main body until it is taken out is integrated, and when this integrated value exceeds a predetermined value, it is determined that the tank detecting means is abnormal.

  When the liquid fuel in the fuel tank disappears due to combustion, the user must remove the fuel tank from the main body in order to fill the fuel tank. If the tank detection means is operating normally at this time, Combustion is stopped when the tank is removed from the main body, and the integrated value of the liquid fuel consumption is initialized. When the fuel tank is attached to the main body, the tank detection means detects this, and combustion can be resumed, and the liquid fuel consumption is started from the initial value.

  On the other hand, when the tank detection means breaks down and it is always determined that the fuel tank is attached to the main body, even if the fuel tank is taken out, combustion is not stopped at this point, The integrated value of liquid fuel consumption is not initialized. Therefore, if the fuel tank is attached to the main body after the fuel is injected into the fuel tank, the integration is continued, and the integrated value increases.

  However, since the integrated value is initialized when the fuel tank is removed, the amount of liquid fuel consumption accumulated from the time the fuel tank is mounted to the main body is removed. There should be no more than a full tank. That is, when the integrated value increases to a certain value or more, it can be determined that the tank detection means has failed and it has not been detected that the fuel tank has been removed. Therefore, it is determined whether or not the integrated value has reached a predetermined value. When the integrated value has reached a predetermined value, it is determined that the tank detection means is abnormal.

  After determining the failure of the tank detection means, if it is displayed that the tank detection means has failed, the user may request repair according to this display and continue to be used in the state of failure. So it can be used safely.

  Further, not only the consumption amount of liquid fuel but also the combustion time can be determined for the abnormality of the tank detection means.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Example 1
FIG. 1 is an internal configuration diagram of the present invention. An oil tank 1 that is detachably provided on a main body and replenishes liquid fuel, an oil tray 2 that stores a predetermined amount of liquid fuel supplied from the fuel tank 1, and an oil tray 2 The liquid level detecting means 3 for detecting the amount of the liquid fuel and the electromagnetic pump 4 for pumping the liquid fuel stored in the oil receiving tray 2 are provided.

  When combustion is started, the liquid fuel in the oil pan 2 is pumped up by the electromagnetic pump 4 and consumed. However, since the consumed liquid fuel is supplied from the fuel tank 1, the oil pan 2 is always in the oil pan 2. A certain amount of liquid fuel is stored.

  When the liquid fuel in the fuel tank 1 is exhausted, the liquid fuel is no longer supplied to the oil receiving tray 2, so the liquid level of the liquid fuel in the oil receiving tray 2 is gradually lowered, and the liquid level detecting means 3 When it is detected that the liquid fuel in the oil receiving tray 2 has become a predetermined amount or less, it is determined that there is no fuel, and it is informed that it is necessary to supply fuel to the fuel tank 1.

  FIG. 2 is a block diagram showing the main part of the present invention. The tank detection means 10 for detecting that the fuel tank 1 is housed in the main body, the display part 11 for displaying the operation state, and the operation of the equipment. A control unit 13 for controlling the operation of the device, a consumption measuring means 15 for measuring the consumption of liquid fuel, a non-volatile memory for storing an integrated value of liquid fuel consumption, an abnormality content, etc. The memory | storage means 14 which consists of is provided.

  The control unit 13 measures the consumption amount of the liquid fuel while the tank detection unit 10 detects that the fuel tank 1 is housed in the main body, and stores the integrated value of the consumption amount. Store in the means 14. When the tank detection means 10 detects that the fuel tank 1 is not accommodated in the main body, the integrated value in the storage means 14 is initialized. That is, the storage means 14 stores an integrated value of the consumption amount of liquid fuel from when the fuel tank 1 is mounted to the main body until it is extracted from the main body for fueling.

  Further, since the storage means 14 is composed of a non-volatile memory, the integrated value can be stored even if the power supply is stopped due to a power failure or a power outlet being removed.

  In addition, the tank detection means 10 is configured by a microswitch or a switch whose contact is opened and closed by a magnet, or a sensor that detects the weight of the fuel tank 1 can be used as the tank detection means 10.

  Next, the operation of the liquid fuel combustion apparatus according to this embodiment having the above-described configuration will be described with reference to the flowchart of FIG.

  In a state where the fuel tank 1 is mounted on the main body, the tank detection means 10 detects that the fuel tank 1 is accommodated in the main body, and the control unit 13 is based on a signal from the tank detection means 10. An instruction to start combustion is accepted only when the fuel tank 1 is attached.

  When the combustion is started, the liquid fuel in the fuel tank 1 is gradually consumed, and in the control unit 13, the consumption measuring unit 15 measures the consumption amount of the liquid fuel and stores the integrated value in the storage unit 14. Store (step 1). Thereafter, when the liquid fuel in the oil receiving tray 2 becomes a predetermined amount or less due to the continuation of combustion, the liquid level detecting means 3 is operated.

  Based on this notification, when the user removes the fuel tank 1 from the main body, the tank detection means 10 detects that the fuel tank 1 is not accommodated (step 2), so that the controller 13 automatically burns. Is stopped (step 3), and the integrated value of the consumption amount of liquid fuel stored in the storage means 14 is initialized (step 4).

  Thereafter, when the fuel supply to the fuel tank 1 is completed and the fuel tank 1 is attached to the main body, the tank detection means 10 detects the fuel tank 1 and the control unit 13 enters a state of accepting an instruction to start combustion. Combustion is started again by operating the operation button of the section 12. In addition, since it is a necessary condition that the tank detection means 10 detects the fuel tank 1 in order to start combustion, even if the operation button is operated without the fuel tank 1 being mounted, combustion cannot be started. Absent.

  Then, when fuel is supplied from the fuel tank 1 to the oil tray 2 and combustion is started, the consumption measuring means 15 measures the consumption of liquid fuel again, and the initialized storage means 14 consumes the liquid fuel. The integrated value of the quantity is stored.

  On the other hand, if fuel supply is not replenished in spite of the refueling notification, the liquid fuel in the oil receiving tray 2 will eventually be completely exhausted and combustion will stop. At this time, the display unit 11 displays that the combustion has stopped due to running out of fuel.

  The above is the control when the tank detection means 10 is operating normally. However, if the tank detection means 10 fails and it is determined that the fuel tank 1 is always stored, Even if the fuel tank 1 is removed from the main body for refueling, the combustion does not stop in step 2. Further, since the integrated value of the consumption amount of the liquid fuel stored in the storage unit 14 is not initialized, the integrated value increases.

  Therefore, it is determined whether or not the integrated value of the storage means 14 is greater than or equal to a predetermined value (step 5), and if it exceeds the predetermined value, the control unit 13 determines that the tank detection means 10 has failed. The combustion is forcibly stopped (step 6). At the same time, the display unit 11 displays that the tank detection means 10 is out of order (step 7).

  In other words, since the integrated value of the storage means 14 is initialized when the fuel tank 1 is removed, the amount of liquid fuel to be integrated is attached to the main body. It must be only the full amount of the fuel tank 1 until it is taken out. Nevertheless, if the integrated value increases beyond a certain value, it is considered that it has not been detected that the tank detection means 10 has failed and the fuel tank 1 has been removed. Therefore, when the integrated value reaches a predetermined value, it is determined that the tank detection means 10 is abnormal.

  When it is determined that the tank detection means 10 is out of order, the control unit 13 stores this in the storage means 14 and prohibits subsequent operations. Alternatively, the number of times that the failure of the tank detection unit 10 is detected may be stored in the storage unit 14, and the subsequent operation may be prohibited when the failure is detected a predetermined number of times.

  Since the storage means 14 is composed of a non-volatile memory, the stored contents are retained even if the power is removed, and the operation is resumed unless the tank detection means 10 is repaired and the prohibition of operation of the storage means 14 is released. I can't. Therefore, the device is prevented from being used in a state where it has failed, so that it can be used safely.

  In addition, the operation prohibition must be canceled by a special operation of the operation unit 12 or by providing a canceling means on the control board so that the user cannot easily perform it.

(Example 2)
FIG. 4 is a block diagram showing a main part of the second embodiment. The difference from the first embodiment is that a combustion time measuring means 16 for measuring the combustion time is provided instead of the consumption measuring means 15, and the storage means 14 is the combustion measured by the combustion time measuring means 16. The accumulated value of time and the contents of abnormality are stored.

  The flowchart of FIG. 5 shows the operation of the combustion apparatus having the above-described configuration. When combustion is started, the combustion time measuring means 16 starts measuring and storing the combustion time in the control unit 13. The integrated value of the combustion time is stored in the means 14 (step 1).

  When the liquid fuel in the oil pan 2 becomes a predetermined amount or less due to the continuation of combustion, it is notified that refueling is necessary. The means 10 detects that the fuel tank 1 is not accommodated (step 2), the control unit 13 automatically stops combustion (step 3), and the integrated value of the combustion time stored in the storage means 14 Is initialized (step 4).

  Thereafter, when the fuel supply to the fuel tank 1 is completed and the fuel tank 1 is attached to the main body, the tank detection means 10 detects the fuel tank 1 and the control unit 13 enters a state of accepting an instruction to start combustion. Combustion is started again by operating the operation button of the section 12. When fuel is supplied from the fuel tank 1 to the oil tray 2 and combustion starts, the combustion time measuring means 16 measures the combustion time again, and the initialized storage means 14 stores the accumulated value of the combustion time. Is done.

  The above is the control when the tank detection means 10 is operating normally. However, if the tank detection means 10 fails and it is determined that the fuel tank 1 is always stored, Even if the fuel tank 1 is removed from the main body for refueling, the combustion does not stop in step 2, and the integrated value of the combustion time stored in the storage means 14 is not initialized, so the integrated value increases. To go.

  Therefore, it is determined whether or not the integrated value of the storage means 14 is greater than or equal to a predetermined value (step 5), and if it exceeds the predetermined value, the control unit 13 determines that the tank detection means 10 has failed. Combustion is forcibly stopped (step 6), and at the same time, the display unit 11 displays that the tank detection means 10 is out of order (step 7).

  That is, since the integrated value of the storage means 14 is initialized when the fuel tank 1 is removed, the accumulated combustion time is taken out after the fuel tank 1 is mounted on the main body. The maximum amount of the fuel tank 1 should be reached. Nevertheless, if the integrated value increases beyond a certain value, it is considered that it has not been detected that the tank detection means 10 has failed and the fuel tank 1 has been removed. Therefore, when the integrated value reaches a predetermined value, it is determined that the tank detection means 10 is abnormal.

  When it is determined that the tank detection means 10 is out of order, the control unit 13 stores this in the storage means 14 and prohibits subsequent operations. Alternatively, the number of times that the failure of the tank detection unit 10 is detected may be stored in the storage unit 14, and the subsequent operation may be prohibited when the failure is detected a predetermined number of times.

(Example 3)
FIG. 6 is a block diagram showing the main part of the third embodiment. The tank detecting means 10 for detecting that the fuel tank 1 is mounted on the main body is a micro switch or a switch whose contact is opened and closed by a magnet. It is configured.

  The weight detection unit 17 detects the weight of the fuel tank 1 mounted on the main body, and the display unit 11 displays the remaining amount of liquid fuel in the fuel tank 1 from the detection result of the weight detection unit 17. It has become so.

  The calculating means 18 calculates a predetermined value to be compared with the integrated value of the consumption amount of liquid fuel in order to determine the failure of the tank detecting means 10, and this predetermined value is obtained when the fuel tank 1 is mounted on the main body. It is determined based on the weight of the fuel tank 1 detected by the weight detection means 17 at the time.

  In the above configuration, when the control unit 13 detects that the fuel tank 1 is attached to the main body, the calculation unit 18 determines a predetermined value based on the weight of the fuel tank 1 detected by the weight detection unit 17 at that time. . When combustion is started, the consumption measuring unit 15 measures the consumption amount of the liquid fuel, and stores the integrated value of the consumption amount in the storage unit 14. Thereafter, when the tank detecting means 10 detects that the fuel tank 1 is not accommodated in the main body, the integrated value of the storage means 14 is initialized, and the integrated value of the storage means 14 is determined by the calculating means 18. When the value is exceeded, it is determined that the tank detection means 10 has failed and the combustion is forcibly stopped.

  That is, the time required to determine the failure of the tank detection means 10 is until the integrated value of the liquid fuel consumption reaches a predetermined value, but the amount of liquid fuel actually consumed is mounted on the fuel tank 1. It depends on the amount of liquid fuel that has entered the fuel tank 1 at the time. Therefore, the failure of the tank detecting means 10 can be determined quickly and accurately by determining the predetermined value by the calculating means 18 based on the weight of the fuel tank 1 when it is attached to the main body.

  Further, the same determination can be made by using the combustion time measuring means 16 for measuring the combustion time instead of the consumption measuring means 15.

It is an internal block diagram of this invention. It is the block diagram which showed the principal part of Example 1 of this invention. It is a flowchart showing control of Example 1 of this invention. It is the block diagram which showed the principal part of Example 2 of this invention. It is a flowchart showing control of Example 2 of this invention. It is the block diagram which showed the principal part of Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil supply tank 10 Tank detection means 11 Display part 13 Control part 14 Memory | storage means 17 Weight detection means

Claims (6)

  Refueling tank removably accommodated in the main body, tank detection means for detecting whether the fuel tank is accommodated in the main body, and combustion when the tank detection means detects that the fuel tank is not accommodated in the main body In the combustion apparatus provided with the control unit for stopping the fuel consumption, the control unit measures the fuel consumption and stores the integrated value, and when it is detected that the fuel tank is not accommodated in the main body, the integrated value is initialized. When the integrated value reaches a predetermined value, it is determined that the tank detection means is abnormal.   Refueling tank removably accommodated in the main body, tank detection means for detecting whether the fuel tank is accommodated in the main body, and combustion when the tank detection means detects that the fuel tank is not accommodated in the main body In the combustion apparatus having a control unit for stopping the engine, the control unit measures the combustion time and stores the integrated value, and initializes the integrated value when it is detected that the fuel tank is not accommodated in the main body, A liquid fuel combustion apparatus characterized in that when the integrated value reaches a predetermined value, it is determined that the tank detection means is abnormal.   3. The liquid fuel combustion apparatus according to claim 1 or 2, further comprising a display unit for displaying an operation state and the like, and displaying the abnormality on the display unit when it is determined that the tank detection unit is abnormal.   The liquid fuel combustion apparatus according to claim 1, further comprising a non-volatile storage unit, wherein the control unit stores the integrated value in the non-volatile storage unit.   5. The liquid fuel combustion apparatus according to claim 1, wherein the controller prohibits subsequent operation when it is determined that the tank detection unit is abnormal.   6. The liquid fuel according to claim 1, further comprising weight detection means for detecting the weight of the fuel tank, wherein the predetermined value is changed according to the weight when the fuel tank is mounted on the main body. Combustion device.

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