JP5145163B2 - 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 fuel cap being correctly attached, the fuel cap will come off and the fuel will splash on the 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, tank detection means that detects whether the oil tank is accommodated in the main body, an oil tray that is supplied with liquid fuel from the fuel tank, and an oil tray In a combustion apparatus comprising a liquid level detection means for detecting the amount of liquid fuel and a control section for stopping combustion when the tank detection means detects that the fuel tank is not accommodated in the main body, the control section comprises: When the tank detection means detects the fuel tank, the detection result of the liquid level detection means changes from the presence of fuel to the absence of fuel, and further changes to the presence of fuel, it is determined that the tank detection means is abnormal. It is a liquid fuel combustion device.

  Further, a fuel tank detachably accommodated in the main body, a tank detecting means for detecting whether the fuel tank is accommodated in the main body, a tank oil amount detecting means for detecting the amount of liquid fuel in the fuel tank, When the tank detection means detects that the fuel tank is not housed in the main body, the combustion apparatus includes a control unit that stops combustion. The control unit detects the oil tank while the tank detection means detects the fuel tank. A liquid fuel combustion apparatus characterized in that when the amount detection means detects that the amount of liquid fuel in the fuel tank has increased by a predetermined amount or more, 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 apparatus according to any one of claims 1 to 3, further comprising a non-volatile storage means, wherein when the abnormality of the tank detection means is detected, the abnormality content is stored in the storage means and the subsequent operation is prohibited. It is a liquid fuel combustion apparatus of description.

  4. The apparatus according to claim 1, further comprising a non-volatile storage unit, wherein when the abnormality of the tank detection unit is detected a predetermined number of times, the storage unit stores the content of the abnormality and prohibits the subsequent operation. A liquid fuel combustion apparatus according to claim 1.

  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 accommodated in the main body In a combustion apparatus having a control unit for stopping combustion and a non-volatile storage unit, the control unit stops combustion when it is determined that there is an abnormality in the tank detection unit, and an abnormality content is stored in the storage unit. The liquid fuel combustion apparatus is characterized in that it is memorized and the subsequent operation is prohibited.

  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 accommodated in the main body In a combustion apparatus having a control unit for stopping combustion and a non-volatile storage unit, when the control unit determines that there is an abnormality in the tank detection unit, the combustion is stopped and an abnormality in the tank detection unit is detected. The liquid fuel combustion apparatus is characterized in that the abnormality content is stored in the storage means when the predetermined number of times is detected, and the subsequent operation is prohibited.

  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. When the fuel tank is in the detected state, the oil receiving tray is not in a state where there is fuel, and when the fuel is changed to a state where fuel is present, it is determined that the tank detection means is abnormal. is there.

  Specifically, when the fuel is consumed by the combustion and the liquid fuel in the fuel tank is exhausted, the liquid fuel is not supplied to the oil receiving tray, so the liquid level detecting means is activated to detect the absence of fuel. At this time, since the fuel tank is still in the main body, it is detected that there is a fuel tank. When the liquid level detection means is activated, it is informed that refueling is necessary, so the user takes out the fuel tank from the main body in order to refill the fuel tank. At this time, the tank detection means is operating normally. If so, combustion is stopped.

  However, if the tank detecting 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. Then, when the fuel tank is removed and fuel is injected into the fuel tank, and then the fuel tank is attached to the main body, the fuel is supplied to the oil tray, so that the liquid level detection means continues to detect that there is a fuel tank. Detects the presence of liquid fuel.

  However, if the tank is originally housed in the main body, it is not possible to change from a state where there is no fuel in the oil pan to a state where there is fuel. Therefore, in this case, it can be determined that the tank detection means has failed and it has not been detected that the tank has been removed.

  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.

  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.

  The fuel tank 1 includes a tank cap 6 that is detachably screwed to the tank cap 5. A fuel discharge port 7 that discharges liquid fuel in the fuel tank 1 and a fuel discharge port are provided at the tip of the tank cap 6. An on-off valve 8 that opens and closes 7 and a spring 9 that presses the on-off valve 8 against the fuel discharge port 7 are provided.

  The oil pan 2 is provided with an oil filter 10 into which a tank cap 6 is inserted. A pin 11 is erected on the bottom of the oil filter 10, and the oil tank 1 is connected to the oil filter of the oil pan 2. 10, the opening / closing valve 8 provided in the tank cap 6 contacts the pin 11, the opening / closing valve 8 is pushed up against the elasticity of the spring 9, the fuel discharge port 7 is opened, and the fuel tank 1. The liquid fuel inside is supplied into the oil tray 2 through the oil filter 10.

  When combustion is started, the liquid fuel in the oil receiver 2 is pumped up and consumed by the electromagnetic pump 4, but the consumed liquid fuel is supplied from the fuel tank 1 as described above. 2 always stores a certain amount of liquid fuel.

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

  FIG. 2 is a block diagram showing the main part of the present invention. The tank detection means 12 detects that the fuel tank 1 is mounted on the main body, the display unit 13 displays the operation state, and the operation of the device. A control unit 15 that controls the operation of the device, and a storage unit 16 including a nonvolatile memory that stores abnormal contents, data to be displayed on the display unit 13, and the like.

  In addition, the tank detection means 12 is comprised by the switch etc. which a contact opens / closes by a micro switch or a magnet, The sensor which detects the weight of the fuel tank 1 can also be used as the tank detection means 12.

  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 detecting means 12 detects that the fuel tank 1 is mounted on the main body, and the control unit 15 is based on a signal from the tank detecting means 12. 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 when the liquid fuel in the oil receiving tray 2 becomes a predetermined amount or less, the liquid level detecting means 3 operates. It is determined that the liquid fuel has been exhausted, that is, the state with or without liquid fuel has changed (step 1). In addition, even if the oil level changes due to movement of the equipment, the liquid level detection means 3 may operate instantaneously. Therefore, in order to avoid erroneous determination, the control unit 15 has detected that the liquid level has fallen below the predetermined amount. When the liquid level detecting means 3 continues to detect T1 for a predetermined time, it is determined that there is no fuel and a notification is made that refueling is necessary.

  Based on this notification, when the user removes the fuel tank 1 from the main body, the tank detection means 12 detects that the fuel tank 1 is not mounted (step 2), so that combustion is automatically stopped. (Step 3).

  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 12 detects the fuel tank 1, and the control unit 15 enters a state of accepting an instruction to start combustion. Combustion is started again by operating the operation button of the section 14. In addition, since it is a necessary condition for the tank detection means 12 to detect the fuel tank 1 in order to start combustion, it is not possible to start combustion even if the operation button is operated without the fuel tank 1 being attached. Absent.

  Then, when fuel is supplied from the oil supply tank 1 to the oil receiving tray 2 and the fuel in the oil receiving tray 2 reaches a predetermined amount or more, the liquid level detecting means 3 detects the liquid fuel. The control unit 15 determines that there is fuel when the liquid level detection means 3 continues to detect the predetermined time T2 that the liquid level has exceeded a predetermined amount in order to avoid an erroneous determination similar to the determination of no fuel. Stop refueling notification.

  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 13 displays that the combustion has stopped due to running out of fuel.

  The above is the control when the tank detection means 12 is operating normally, but if the tank detection means 12 fails and it is determined that the fuel tank 1 is always installed, Even if the fuel tank 1 is removed from the main body for refueling, the combustion does not stop in step 2.

  At this time, the amount of liquid fuel in the oil pan 2 is next monitored, and the liquid level detecting means 3 detects that the liquid fuel has exceeded the predetermined amount and detects that the fuel is in the oil pan 2 for a predetermined time T2. If so (step 4), the control unit 15 determines that the tank detection means 12 has failed and forcibly stops combustion (step 5). At the same time, the display unit 13 displays that the tank detection means 12 is out of order (step 6).

  That is, in order to replenish the fuel tank 1 with fuel, the fuel tank 1 must be taken out from the main body. Therefore, if the tank detecting means 12 is operating normally, it is confirmed that the fuel tank 1 is not installed. Should be detected. Nevertheless, the fact that the liquid level detection means 3 detects the rise of the liquid level while detecting the fuel tank 1 is nothing but that the tank detection means 12 is not operating normally. It is determined that 15 is a failure of the tank detection means 12.

  When it is determined that the tank detection unit 12 is out of order, the control unit 15 stores this in the storage unit 16 and prohibits subsequent operations. Alternatively, the number of times that the failure of the tank detection unit 12 is detected may be stored in the storage unit 16, and the subsequent operation may be prohibited when the failure is detected a predetermined number of times.

  Since the storage means 16 is composed of a non-volatile memory, the stored contents are retained even if the power is disconnected, and the operation is resumed unless the tank detection means 12 is repaired and the prohibition of operation of the storage means 16 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 14 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 the main part of the second embodiment. The tank detection means 12 detects that the fuel tank 1 is mounted on the main body, and the tank oil detects the remaining oil amount in the fuel tank 1. Volume detection means 17, display unit 13 for displaying the operation state, operation unit 14 for instructing the operation of the device, control unit 15 for controlling the operation of the device, non-volatile storage for storing abnormal contents, data displayed on the display operation unit 14, and the like The storage means 16 is composed of a sex memory.

  The tank detection means 12 is configured by a microswitch or a switch whose contact is opened and closed by a magnet. The tank oil amount detection means 17 detects the weight of the fuel tank 1 and the display unit 13 displays the remaining amount of liquid fuel in the fuel tank 1 from the detection result of the tank oil amount detection means 17. It has become.

  The flowchart in FIG. 5 represents the operation of the combustion apparatus having the above-described configuration. Combustion continues while the tank detection means 12 detects the fuel tank 1, but when an increase in the amount of residual oil in the fuel tank 1 is detected while the fuel tank 1 is detected ( In step 1), the control unit 15 determines that the tank detecting means 12 has failed and forcibly stops combustion (step 2). At the same time, the display operation unit 14 displays that the tank detection means 12 is out of order (step 3).

  That is, in order to replenish the fuel tank 1 with fuel, the fuel tank 1 must be taken out from the main body. Therefore, if the tank detecting means 12 is operating normally, it is confirmed that the fuel tank 1 is not installed. Should be detected. Nevertheless, the increase in the amount of residual oil in the fuel tank 1 while detecting the fuel tank 1 is nothing but the fact that the tank detection means 12 is not operating normally. It is determined that the tank detection means 12 is out of order.

  In this embodiment, since the remaining oil amount in the fuel tank 1 is detected to determine whether or not the fuel has been supplied, the liquid level detecting means 3 is not in operation (liquid fuel still remains in the fuel tank 1). Even when refueling is performed in a state where the tank detection means 12 is malfunctioning, it is possible to determine the failure of the tank detection means 12.

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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil supply tank 2 Oil receiving tray 3 Liquid level detection means 12 Tank detection means 13 Display part 15 Control part 16 Storage means 17 Tank oil amount detection means

Claims (7)

  A refueling tank removably accommodated in the main body, a tank detecting means for detecting whether or not the refueling tank is accommodated in the main body, an oil receiving tray to which liquid fuel is supplied from the fuel tank, and the liquid fuel in the oil receiving tray. In a combustion apparatus comprising a liquid level detection means for detecting the amount and a control section for stopping combustion when the tank detection means detects that the fuel tank is not accommodated in the main body, the control section is configured by the tank detection means. A liquid fuel combustion apparatus characterized in that, when a fuel tank is detected, the detection result of the liquid level detection means changes from the presence of fuel to no fuel, and further changes to the presence of fuel, 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, tank oil amount detection means for detecting the amount of liquid fuel in the fuel tank, and tank detection When the means detects that the fuel tank is not housed in the main body, the combustion device includes a control unit that stops combustion. The control unit detects the tank oil amount when the tank detection unit detects the fuel tank. A liquid fuel combustion apparatus characterized in that when the means detects that the amount of liquid fuel in the fuel tank has increased by a predetermined amount or more, 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 non-volatile storage means is provided, and when the abnormality of the tank detection means is detected, the abnormality content is stored in the storage means and the subsequent operation is prohibited. Liquid fuel combustion device.   A non-volatile storage means is provided, and when the abnormality of the tank detection means is detected a predetermined number of times, the abnormality content is stored in the storage means and the subsequent operation is prohibited. The liquid fuel combustion apparatus as described.   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 a control unit for stopping the combustion and the non-volatile storage means, when the control unit determines that there is an abnormality in the tank detection means, the combustion is stopped, and the abnormality content is stored in the storage means In addition, a liquid fuel combustion apparatus that prohibits subsequent operation.   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 combustion and the non-volatile storage unit, the control unit stops combustion when it is determined that there is an abnormality in the tank detection unit, and the abnormality of the tank detection unit is determined a predetermined number of times. A liquid fuel combustion apparatus characterized by storing abnormal contents in a storage means when detected and prohibiting subsequent operation.

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