JP2017083167A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid fuel combustion device with a simple constitution which can prevent an accident such as fire disaster when gasoline is used by mistake.SOLUTION: A liquid fuel combustion device includes a weight sensor 35 for detecting the weight of a cartridge tank 6. A consumption amount estimation value of liquid fuel which is calculated from a combustion amount in prescribed time is compared with a decrease amount of the liquid fuel which is detected by the weight sensor 35, and combustion is stopped when a difference between the consumption amount estimation value and the decrease amount of the liquid fuel exceeds a prescribed range. Thereby, combustion can be automatically stopped when gasoline is put into the cartridge tank 6 and is used by mistake and overflows from an oil pan 7. As a result, occurrence of fire disaster can be prevented.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a structure for preventing an accident that occurs when gasoline is erroneously used in a liquid fuel combustion apparatus using kerosene as fuel.

  Conventionally, combustion devices that use kerosene as fuel, such as oil fan heaters, have been widely used, but in such combustion devices, if gasoline is accidentally used, there is a risk of developing a serious accident. There is.

  Since gasoline has the property of being more volatile than kerosene, when the combustion device is operated using gasoline, the gasoline in the cartridge tank is vaporized due to the temperature rise inside the combustion device. Pressure increases. Due to this pressure increase, a large amount of gasoline flows into the oil receiving tray from the cartridge tank, and the liquid level in the oil receiving tray rises abnormally and eventually overflows to the outside.

  When the overflowing gasoline flows in the direction of the high-temperature combustion part, volatilization is accelerated by heat and gas is generated, and if this gas ignites a flame, it may cause an accident such as a fire. A device equipped with a safety device such as stopping combustion when used is proposed.

  For example, in Patent Document 1, the combustion state of the burner differs depending on whether the fuel is kerosene or gasoline, and a change in the combustion state is detected by an ionic current flowing between the burner and the frame sensor. ing. Specifically, if the combustion state is stable because the fuel is kerosene, the equivalent resistance value of the equivalent circuit is reduced by the ionic current flowing in the combustion flame, and the combustion state is caused by the fuel being gasoline. If becomes unstable, the equivalent resistance value becomes large. Therefore, the equivalent resistance value is compared with a predetermined set value to determine whether the liquid fuel is kerosene or gasoline.

  Moreover, in patent document 2, when gasoline is used, using the fact that the liquid level in the oil pan rises abnormally, a high oil level detecting means is provided in the oil pan, and the liquid level of the oil pan is normal. When the high oil level detection means detects that the liquid level has risen, the operation is stopped.

JP-A-9-250743 JP-A-8-145336

  However, in the method of Patent Document 1, theoretically, the ionic current flowing between the burner and the frame sensor differs between kerosene and gasoline, but in practice, it is greatly influenced by the use status of the combustion device and the like. For this reason, it is difficult to set the determination reference value clearly, and it is also possible to cause erroneous detection.

  Further, even if kerosene is used, if the cartridge tank is left in a place where the temperature is high, the pressure in the cartridge tank increases, and a larger amount of fuel than usual is supplied to the oil tray. Therefore, as in Patent Document 2, if a high oil level detection means is provided, it must be provided at a position considerably higher than the normal liquid level in order to clearly distinguish gasoline misuse. The shape of the oil pan increases and the manufacturing cost increases.

  The present invention is to solve the above-mentioned problems, and to provide a liquid fuel combustion apparatus that can prevent an accident such as a fire when a gasoline is accidentally used with a simple configuration. Objective.

  The present invention relates to a cartridge tank that is detachably provided in a main body and stores liquid fuel, an oil receiving tray in which the cartridge tank is mounted on the upper surface and supplied with liquid fuel, and a burner unit that burns the liquid fuel A mounting base having a substantially concave outer peripheral edge at the periphery of the component mounting portion on which the oil receiving pan and the burner portion are mounted, and a weight sensor for detecting the weight of the cartridge tank A liquid fuel combustion apparatus comprising: a liquid fuel consumption estimated value calculated from a combustion amount within a predetermined time and a liquid fuel decrease amount detected by the weight sensor; The liquid fuel combustion apparatus is characterized in that combustion is stopped when the difference between the estimated consumption amount and the reduction amount exceeds a predetermined range.

  Further, a reservoir portion is formed by separating the peripheral portion of the oil receiving tray at the outer peripheral edge from other portions, and a casting path that guides liquid fuel overflowing from the oil tray on the upper surface of the oil tray toward the storing portion. The liquid fuel combustion apparatus according to claim 1, wherein: is formed.

  By configuring as described above, it is possible to prevent the occurrence of fire even if gasoline is accidentally put into the cartridge tank and used when it overflows from the oil tray.

It is an internal block diagram of the fan heater which is an example of a liquid fuel combustion apparatus. It is the upper surface schematic of a main body. It is a perspective view of a mounting base. It is sectional drawing of an oil saucer part. It is a figure which shows the modification of a mounting base. It is a figure explaining the shape of the oil receiving tray and mounting stand of Example 2. FIG. It is a figure explaining the shape of the oil receiving tray and mounting stand of Example 3, Comprising: (A) is the state which removed the frame, (B) is the figure which showed the state which attached the frame to the mounting base. FIG. 10 is a block diagram of a control unit according to a fourth embodiment.

  Embodiments of the present invention that are considered to be suitable will be briefly described by showing the effects of the present invention.

  The present invention relates to a liquid fuel combustion apparatus including a weight sensor for detecting the weight of a cartridge tank, the liquid fuel consumption estimated value calculated from the combustion amount within a predetermined time, and the liquid fuel detected by the weight sensor. When the difference between the estimated amount of consumption of liquid fuel and the reduction amount exceeds a predetermined range, the combustion is stopped.

  Accordingly, it is possible to detect the misuse of gasoline from the change in the weight of the cartridge tank and automatically stop the combustion, so that the combustion apparatus is excellent in safety.

  In addition, of the concave outer peripheral edge provided on the periphery of the pedestal, the peripheral portion of the oil pan is isolated from the peripheral portion of the burner portion as a storage portion, and liquid fuel overflowing from the oil pan is stored on the top surface of the oil pan A casting path that leads in the direction of the part is formed.

  In other words, if gasoline is accidentally used as liquid fuel, a large amount of gasoline flows from the cartridge tank into the oil pan, and the liquid level in the oil pan rises abnormally and overflows to the outside. The gasoline that has been discharged is discharged to the reservoir along the casting route.

  During the operation of the combustion apparatus, the burner part is exposed to the flame, so that the temperature of the pedestal at the part where the burner part is placed and the outer peripheral edge near the burner part also rise. When the gasoline overflowing from the oil pan flows into the portion where the temperature rises in this way, the gasoline is vaporized, and a flame is ignited to cause a fire. On the other hand, since the temperature around the oil pan is far from the flame, the temperature is relatively difficult to rise, so by forming a reservoir around the oil pan and discharging the gasoline overflowing from the oil pan into this reservoir, Even if gasoline overflows, the flame can be prevented from igniting and the risk of a fire can be avoided.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is an internal configuration diagram of a fan heater which is an example of a liquid fuel combustion apparatus. In a main body 3 including a frame 1 constituting a side surface and a back surface and a table 2 constituting a bottom surface, liquid fuel such as kerosene is heated. The vaporizer 4 to be vaporized, the burner unit 5 for burning the vaporized gas generated in the vaporizer 4, the cartridge tank 6 detachably attached to the main body 3, and the cartridge tank 6 are placed and supplied from the cartridge tank 6. An oil pan 7 for storing fuel is provided.

  Also, a blower 8 for supplying air to the inside of the main body 3 is attached to the back of the main body 3, and the combustion exhaust gas generated by the combustion in the burner unit 5 is mixed with the air supplied from the blower 8 to become hot air. The room is heated by being discharged from the front surface of the main body 3.

  FIG. 2 is a schematic top view of the main body 3, and FIG. 3 is a perspective view of the mounting table 2. The mounting table 2 includes a central component mounting portion 9 on which the oil tray 7 and the burner portion 5 are mounted, and a substantially concave outer peripheral edge portion 10 formed on the outer periphery of the component mounting portion 9. The outer peripheral edge portion 10 is formed with two separating convex portions 12 having a raised bottom surface 10a. The outer peripheral edge portion 10 is divided into two parts by the separating convex portion 12, and the oil receiving tray 7 is included. The outer peripheral edge portion 10 in the periphery (a part of the back surface and front surface of the main body 3 and the right side surface) acts as a storage portion 13 for storing the liquid fuel overflowing from the oil tray 7.

  Of the outer peripheral edge 10, the outer wall 10 b of the reservoir 13 is provided with a recess 11, and the height of the outer wall 10 b of the portion where the recess 11 is formed is higher than the height of the isolation protrusion 12. Is also low.

  On the upper surface of the oil pan 7, there are attached an electromagnetic pump 14 that pumps kerosene stored therein and supplies it to the vaporizer 4, and a liquid level sensor 15 that detects the amount of liquid fuel in the oil pan 7. A tank insertion port 16 into which the cartridge tank 6 is inserted is formed. The tank insertion port 16 is provided with an oil filter 17 for filtering impurities such as dust mixed in the liquid fuel, and the cap 18 of the cartridge tank 6 is inserted into the oil filter 17 as shown in FIG. Thus, the cartridge tank 6 is placed on the oil receiving tray 7.

  A pin 19 protrudes from the center of the oil filter 17. When the cartridge tank 6 is mounted, the pin 19 opens a fuel discharge port 18 a provided in the base 18 of the cartridge tank 6. Liquid fuel is supplied into the oil tray 7 through the oil filter 17. When the liquid level in the oil tray 7 rises and reaches the fuel discharge port 18a, the supply of liquid fuel from the cartridge tank 6 stops. By repeating this, a constant amount of liquid is always supplied to the oil tray 7. Fuel is stored.

  A casting path 20 extending from the tank insertion port 16 to the rear of the main body 3 is formed on the upper surface of the oil tray 7. If the user accidentally uses highly volatile gasoline instead of kerosene as the liquid fuel, the pressure in the cartridge tank 6 rises due to the vaporization of the gasoline in the cartridge tank 6. A large amount of gasoline flows into the inside. Then, the liquid level in the oil pan 7 rises abnormally, and eventually the gasoline overflows from the tank insertion port 16, but the overflowed gasoline passes through the casting path 20 and is stored in the pedestal 2. It is discharged toward the part 13.

  That is, since the burner unit 5 is exposed to flame during operation of the combustion apparatus, the stage 2 on which the burner unit 5 is placed also becomes high temperature, and the outer peripheral edge 10 near the burner unit 5 and a part where hot air blows out. The temperature of the outer peripheral edge 10 also increases. When the gasoline overflowing from the oil pan 7 flows into the portion where the temperature rises in this way, the gasoline that has flowed in is vaporized, and the flame of the burner section 5 ignites the vaporized gasoline and causes a fire. . On the other hand, since the periphery of the oil pan 7 is away from the flame, the temperature is relatively difficult to rise. Therefore, the reservoir 13 is formed in a portion where the temperature is difficult to rise, and the gasoline overflowing from the oil pan 7 is discharged to the reservoir 13 to prevent the flame from being ignited even if the gasoline overflows. And the danger of fire can be avoided.

  The casting path 20 guides the overflowing gasoline in the direction of the storage portion 13 and may be formed so as to extend from the tank insertion port 16 to the side of the main body 3.

  Further, by extending the reservoir 13 to the front surface of the main body 3, it becomes easy for the user to visually recognize that the gasoline has overflowed, so that misuse of gasoline can be detected at an early stage. Become.

  Further, as shown in FIG. 5, if the width W1 of a part of the storage part 13 is made wider than the width W2 of the outer peripheral edge part 10 other than the storage part 13, the capacity of the storage part 13 can be increased without impairing the appearance of the combustion device. Since it can be enlarged, it is possible to give a grace period to the time that the user notices after the gasoline overflows.

  However, if the misuse of gasoline can be noticed at an early stage, the leaked gasoline only needs to be stored in the storage unit 13, but it may not be immediately noticed. If the level of liquid accumulated in the storage part 13 continues to overflow and exceeds the height of the recessed part 11 formed in a part of the outer wall 10b, the gasoline is discharged from the main body 3 from here. It has become. That is, when the gasoline exceeds the capacity of the storage portion 13, the gasoline is forced to be discharged out of the main body 3 from the recessed portion 11, so that the gasoline exceeds the step with the component mounting portion 9 and the main body 3. This prevents the air from flowing into the inside or over the separating projection 12 and into the outer peripheral edge 10 around the burner portion 5, and at least the risk of fire is avoided.

  However, even if the recessed portion 11 is not provided in the outer wall 10b of the storage portion 13, the above-described effects are provided as long as the height of the outer wall 10b is lower than the level difference from the component mounting portion 9 and the height of the separating convex portion 12. In this case, gasoline is discharged over a wide area outside the main body 3. Therefore, it is more practical to provide the recess 11 in a part of the outer wall 10b because the range in which gasoline is discharged can be narrowed.

  In this embodiment, a fan heater is described as an example of the combustion device. However, the present invention can also be applied to a combustion device that does not require external power supply such as an oil stove.

  Next, Embodiment 2 of the present invention will be described with reference to FIG.

  FIG. 6 is a view for explaining the shapes of the oil pan 7 and the pedestal 2 in the present embodiment. A side path 21 is formed on the side surface of the oil pan 7 so as to be connected to the casting path 20 provided on the upper surface. In addition, a protruding portion 23 is formed at the lower portion of the oil pan 7 so that the lower end of the side surface path 21 is in contact with the upstream storage portion 22 formed on the pedestal 2. The front-stage storage unit 22 is a concave depression formed in the component placement unit 9 and forms a part of the storage unit 13.

  With this configuration, the gasoline overflowing from the tank insertion port 16 reaches the upstream storage part 22 from the casting path 20 through the side surface path 21 and flows from the upstream storage part 22 into the storage part 13. Therefore, the gasoline overflowing from the oil pan 7 can be reliably guided to the storage unit 13.

  Next, Embodiment 3 of the present invention will be described with reference to FIG.

  FIGS. 7A and 7B are diagrams for explaining the shapes of the oil tray 7 and the pedestal 2 in this embodiment. FIG. 7A shows a state in which the frame 1 is removed, and FIG. 7B shows a state in which the frame 1 is attached to the pedestal 2. FIG. A substantially L-shaped flow path member 24 is attached to the oil receiving tray 7, and the flow path of the liquid fuel from the casting path 20 to the upstream storage section 22 is formed by the flow path member 24. Further, the back surface of the main body 3 of the frame 1 is provided with a notch at a position facing the flow path member 24 so that the flow path member 24 is exposed to the outside of the main body 3. The discharged gasoline passes through the outside of the main body 3 and is discharged to the storage unit 13, and it is possible to suppress the vaporization of the gasoline in the main body 3 in the middle of being discharged to the storage unit 13 as much as possible.

  The flow path member 24 shown in FIG. 7 is in a state in which the flow path through which the liquid fuel flows can be seen from the outside of the main body 3, but the flow path member 24 has a hollow inside like a box shape or a cylindrical shape. As a shape, the flow path may not be visible from the outside. By doing in this way, it is suppressed that gasoline will vaporize in the middle of being discharged to storage part 13 more.

  Next, Embodiment 4 of the present invention will be described with reference to FIG.

  FIG. 8 is a block diagram of the control unit 30 that controls the operation of the combustion apparatus. The control unit 30 calculates the combustion amount from the set temperature set by the user and the indoor temperature detected by the room temperature sensor 31. Based on the combustion amount determined by the combustion amount calculation means 32, the temperature of the carburetor 4, the fuel discharge amount of the electromagnetic pump 14, and the rotational speed of the blower 8 are controlled. Furthermore, a consumption amount estimation means 33 for estimating the consumption amount of the liquid fuel within a predetermined time from the combustion amount is provided, and the estimated amount of consumption of the liquid fuel is a cartridge tank detected by the weight sensor 35 in the determination unit 34. Compared to the weight change of 6.

  When the combustion device is operating normally, the amount of change in the weight of the cartridge tank 6 detected by the weight sensor 35 and the estimated value of the consumption amount of liquid fuel should be equal. However, if gasoline is used by mistake, a large amount of gasoline will flow out from the cartridge tank 6 to the oil pan 7, and therefore between the amount of change in the weight of the cartridge tank 6 and the estimated value of consumption of liquid fuel. There will be a difference. Therefore, the determination unit 34 compares the amount of change in the weight of the cartridge tank 6 with the estimated value of the consumption of liquid fuel, and if the difference exceeds a predetermined range, an error is displayed and gasoline may have been used. And stop the combustion.

  In other words, if the user notices that the gasoline overflowing from the oil pan 7 has accumulated in the reservoir 13, the user can stop the combustion, and thus the danger of fire can be avoided, but even if he does not notice, the cartridge tank 6 Since combustion can be automatically stopped by detecting misuse of gasoline from the change in weight, a safer combustion apparatus is obtained.

DESCRIPTION OF SYMBOLS 2 Stand 3 Main body 5 Burner part 6 Cartridge tank 7 Oil receiving tray 9 Component mounting part 10 Outer peripheral edge part 12 Isolation convex part 13 Storage part 20 Casting path 21 Side path 24 Flow path member 35 Weight sensor

Claims (2)

  A cartridge tank that is detachably provided in the main body and stores liquid fuel, an oil receiving tray on which the cartridge tank is mounted and liquid fuel is supplied from the cartridge tank, a burner unit that burns liquid fuel, and the oil A mounting base having a substantially concave outer peripheral edge at the periphery of the component mounting portion on which the tray and the burner portion are mounted, and a weight sensor for detecting the weight of the cartridge tank. A liquid fuel combustion apparatus that compares a liquid fuel consumption estimated value calculated from a combustion amount within a predetermined time with a liquid fuel decrease amount detected by the weight sensor, and calculates a liquid fuel consumption estimated value When the difference between the amount of decrease and the amount of decrease exceeds a predetermined range, the combustion is stopped.   A reservoir portion is formed by separating the peripheral portion of the oil receiving tray at the outer peripheral edge from other portions, and a casting path for guiding liquid fuel overflowing from the oil tray toward the reservoir portion is formed on the upper surface of the oil tray. The liquid fuel combustion apparatus according to claim 1, wherein

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