JP2009236394A - Combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid fuel combustion device capable of securely detecting clogging of an oil filter 10 caused by water and dust without providing an additional component. <P>SOLUTION: The combustion device is provided with a liquid level detection means 18 for detecting the liquid level within an oil pan 2 and a residual amount detection means 19 for detecting the amount of liquid fuel inside an oil feeding tank 1. Based on detection results by the detection means 18, 19, clogging of the oil filter 10 caused by accumulation of water, dust or the like is determined. Thus, without providing an additional component, by using only the detection means, clogging of the oil filter 10 caused by water and dust can be securely detected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  2. Description of the Related Art Generally, a combustion apparatus having an oil supply tank for replenishing liquid fuel represented by an oil fan heater has an oil receiving tray for storing a predetermined amount of liquid fuel supplied from the oil supply tank inside the apparatus, and the liquid in the oil receiving tray. The fuel is pumped up by an electromagnetic pump or the like and supplied for combustion in the burner. Then, when the liquid fuel in the fuel tank is exhausted and the liquid fuel stored in the oil tray becomes a predetermined amount or less, it is notified that the fuel supply is necessary.

  Liquid fuels used for combustion are contaminated with impurities such as water and dust, and even if impurities are not mixed with the original liquid fuel, moisture in the air can condense in the fuel tank. As a result, water may be mixed. When such impurities are supplied to the burner, abnormal combustion may be caused. Therefore, an oil filter having a water repellent finish is provided between the oil tray and the oil tank. Impurities such as dust and dirt are removed and are not supplied to the oil pan.

  However, if water or debris accumulates on the oil filter due to long-term use, the accumulated water or debris will block the eyes of the oil filter, and the liquid fuel in the oil tank will not be able to pass through the oil filter. . Then, although liquid fuel is contained in the fuel tank, liquid fuel is not supplied to the oil receiving tray, so that the fuel runs out, and the combustion apparatus notifies that the fuel supply is necessary.

  However, if you try to refuel the refueling tank based on this refueling notice, liquid fuel is contained in the refueling tank, so many users do not think that it is caused by water or dust accumulated on the filter. There was a problem of nonsense claim that the burner was judged to have failed and a repair request was made to the dealer.

Therefore, in order to solve such a problem, some combustion apparatuses are provided with water detection means for detecting the mixing of water. As this water detection means, electrodes are arranged and energized between the electrodes, and water contamination is detected by a change in energization rate (Patent Document 1), or a sheet that changes color when contacted with water is provided in the oil filter. In some cases, the user is informed that water is mixed (Patent Document 2).
JP 2006-329627 A JP 2005-308368 A

  However, in the former, since a part called an electrode has to be newly added, there is an inevitable problem that the cost is increased due to the increase in the number of parts and the circuit becomes complicated.

  Moreover, in the latter, although there is no problem as mentioned above, if the user pulls out the oil tank and removes the oil filter and does not confirm that the water detection sheet is discolored, it is caused by water contamination. I cannot judge whether or not. And after taking measures such as draining water, it takes time to return the discolored water detection sheet to its original state, because it must be dried for a long time with hot air or replaced with a new one. It was a thing.

  Furthermore, since these detection means are originally intended to detect the mixing of water, if the cause is the accumulation of dust, it will also notify the refueling, which means that the problem has been completely solved I could not say it.

  An object of the present invention is to provide a combustion apparatus that can reliably detect an abnormality of an oil filter due to water or dust without adding new parts.

  The present invention includes an oil pan for storing liquid fuel, a liquid level detecting means for detecting a liquid level of the liquid fuel in the oil pan, a fuel tank for supplying fuel to the oil pan, and a liquid in the fuel tank. From a detection result of the liquid level detection means and the tank remaining amount detection means, comprising a tank remaining amount detection means for detecting the remaining amount of fuel and an oil filter that allows liquid fuel supplied from the oil supply tank to the oil receiving tray to pass therethrough. It is a combustion apparatus characterized by judging abnormality of the oil filter.

  Further, when the liquid level detection means detects that the liquid fuel in the oil tray is below a predetermined value and the tank remaining amount detection means detects the presence of liquid fuel, it is determined that the oil filter is abnormal. The combustion apparatus according to claim 1.

  Also, a burner for burning the liquid fuel, a flame detecting means for detecting the combustion state in the burner, an oil receiving tray for storing the liquid fuel, and a liquid level detecting means for detecting the liquid level of the liquid fuel in the oil receiving tray A fuel tank for supplying fuel to the oil pan, a tank remaining amount detecting means for detecting a remaining amount of liquid fuel in the fuel tank, and an oil for allowing liquid fuel supplied from the fuel tank to the oil pan to pass through A combustion apparatus comprising a filter, wherein an abnormality of the oil filter is determined from detection results of the flame detection means, the liquid level detection means, and the tank remaining amount detection means.

  Further, the liquid level detection means detects that the liquid fuel in the oil tray is below a predetermined value, the tank remaining amount detection means detects the presence of liquid fuel, and the flame detection means detects no flame. The combustion apparatus according to claim 3, wherein the combustion apparatus determines that the oil filter is abnormal.

  The combustion apparatus according to any one of claims 1 to 4, wherein when the abnormality of the oil filter is determined, it is notified that the oil filter needs to be cleaned.

  By configuring as described above, it is possible to reliably detect the abnormality of the oil filter due to water or dust and notify the user with only existing detection means without adding new parts, so it is easy to use. It becomes an excellent combustion device.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode of the present invention, which is considered preferable, will be briefly described by showing the effects of the present invention.

  The combustion apparatus of the present invention comprises a liquid level detection means for detecting the liquid level in the oil pan and a tank remaining amount detection means for detecting the amount of liquid fuel in the fuel tank, and based on the detection results of these detection means, An oil filter abnormality caused by accumulation of water or dust is determined.

  Specifically, when it is detected that the liquid level of the liquid fuel in the oil tray is below a predetermined value, if the tank remaining amount detecting means detects that there is liquid fuel in the fuel tank, Judge that the oil filter is abnormal.

  Liquid fuel is supplied to the oil tray from the fuel tank, and a certain amount of liquid fuel is always stored. The reason why the amount of liquid fuel in the oil pan is reduced is that there is no liquid fuel in the oil tank, and there is liquid fuel in the oil tank but not supplied to the oil pan, that is, the oil tank and the oil pan. In some cases, the oil filter in between is clogged and liquid fuel cannot pass.

  Therefore, to determine these, the remaining amount of liquid fuel in the fuel tank is detected, and if there is no liquid fuel in the fuel tank, it is determined that liquid fuel needs to be replenished to the fuel tank, and a fuel supply notification is issued. If there is liquid fuel in the refueling tank, it is determined that the oil filter is abnormal, and a notification is made that the oil filter needs to be cleaned.

  Therefore, by using the liquid level detection means and the tank remaining amount detection means provided for controlling the combustion, the abnormality of the oil filter can be reliably detected, and there is no need to add new parts. Therefore, the combustion apparatus is excellent in terms of usability and cost.

  Specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an internal configuration diagram of a combustion apparatus according to the present invention, which is detachably provided on a main body, an oil supply tank 1 that replenishes liquid fuel, an oil tray 2 that stores a predetermined amount of liquid fuel supplied from the oil supply tank 1, and oil The electromagnetic pump 3 that pumps up the liquid fuel stored in the tray 2, the vaporizer 4 that heats and vaporizes the liquid fuel pumped up by the electromagnetic pump 3, the fuel gas vaporized in the vaporizer 4 and the primary air are mixed and mixed A burner 5 for burning gas and a display operation unit 6 for instructing the operation of the device and displaying the state are provided.

  The burner 5 detects the presence or absence of flame from the flame hole 7 in which the flame is formed, the ignition means 8 for igniting the air-fuel mixture ejected from the flame hole 7, and the ionic current of the flame formed in the flame hole 7. Flame detection means 9 is provided.

  Further, as shown in FIG. 2, the oil tray 2 is provided with an oil filter 10 into which a tank cap 14 described later is inserted. A pin 11 is erected on the bottom of the oil filter 10, and a filter mesh 12 is provided on the bottom and side walls of the oil filter 10. The inside of 2 communicates. The filter net 12 is made of a water repellent material that allows liquid fuel to pass through but does not allow water to pass through. Therefore, the filter net 12 collects dust mixed in the liquid fuel and is contained in the fuel tank 1. Water is also prevented from flowing into the oil pan 2.

  The fuel tank 1 includes a tank cap 14 that is detachably screwed to the tank cap 13. A fuel discharge port 15 that discharges liquid fuel in the fuel tank 1 and a fuel discharge port are provided at the tip of the tank cap 14. An on-off valve 16 that opens and closes the outlet 15 and a spring 17 that presses the on-off valve 16 against the fuel discharge port 15 are provided.

  Further, the oil receiving tray 2 has an optical liquid level detecting means 18 for detecting the liquid level of the liquid fuel in the oil receiving tray 2, and a tank remaining for detecting the amount of liquid fuel in the fuel tank 1 from the weight of the fuel tank 1. A quantity detection means 19 is provided.

  Next, the operation in the above configuration will be described.

  When the oil tank 1 is mounted on the oil filter 10 of the oil pan 2 from the upper part of the main body, the on-off valve 16 provided in the tank cap 14 contacts the pin 11 and the on-off valve 16 pushes up against the elasticity of the spring 17. Thus, the fuel discharge port 15 is opened, and the liquid fuel in the fuel tank 1 is discharged into the oil filter 10.

  As a result, liquid fuel is contaminated with impurities such as water and dust, and even if impurities are not mixed with the original liquid fuel, moisture in the air is condensed in the fuel tank 1 as a result. Water may be mixed into the liquid fuel. The liquid fuel discharged to the oil receiving tray 2 passes through the filter mesh 12 and flows into the oil receiving tray 2, but impurities such as water and dust cannot pass through the filter mesh 12. Only liquid fuel is supplied.

  When the operation of the combustion apparatus is instructed, the liquid fuel stored in the oil receiving tray 2 is pumped up to the electromagnetic pump 3 and is preliminarily heated to a temperature at which the liquid fuel can be vaporized. Oiled. Then, the vaporizer 4 heats and vaporizes the liquid fuel sent from the electromagnetic pump 3, and the liquid fuel becomes vaporized gas and is ejected from the tip of the vaporizer 4, and the surrounding air is primary air by the ejector effect at the time of ejection. As a mixed gas. Then, the mixed gas is supplied to the burner 5, ejected from the flame hole 7, ignited by the ignition means 8, and a flame is formed in the flame hole 7. The combustion state is monitored by the flame detection means 9.

  In this way, when combustion is started, the liquid fuel in the oil receiving tray 2 is pumped up and consumed by the electromagnetic pump 3, but the consumed liquid fuel is supplied from the fuel tank 1. A constant amount of liquid fuel is always stored in the tray 2. The remaining amount of liquid fuel in the fuel tank 1 is detected by the tank remaining amount detecting means 19 and displayed on the display operation unit 6.

  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 18, and when it is detected that the liquid level detecting means 18 has become a predetermined value or less, it is notified that the fuel supply to the fuel tank 1 needs to be replenished. Yes.

  When the refueling notification is made as described above, the refueling tank 1 is empty, so if the liquid fuel is replenished to the refueling tank 1, the liquid level in the oil receiving tray 2 should recover. However, when water or dust accumulates on the oil filter 10 with long-term use, the accumulated water or dust closes the filter network 12, so that the liquid fuel discharged from the fuel tank 1 causes the oil filter 10 to be discharged. As a result, the liquid fuel cannot be supplied to the oil tray 2. Then, even though there is liquid fuel in the fuel tank 1, the liquid level detecting means 18 detects that the liquid level of the oil receiving tray 2 is below a predetermined value. In this case, it accumulates on the oil filter 10. You must remove the waste water and trash.

  That is, when the liquid level detected by the liquid level detection means 18 is less than or equal to a predetermined value, it may be necessary to supply oil to the oil tank 1 or to clean the oil filter 10. Which of these is determined according to the remaining amount of liquid fuel.

  FIG. 3 is a flowchart showing the control at this time. When the liquid level detecting means 18 detects that the liquid level in the oil receiving tray 2 has become a predetermined value or less (step 1), the remaining amount of liquid fuel in the fuel tank 1 detected by the tank remaining amount detecting means 19 is checked. (Step 2). When the liquid fuel in the fuel tank 1 has run out, it is necessary to replenish the fuel tank 1 with liquid fuel, so that a fuel supply notification is made (step 3).

  On the other hand, when there is liquid fuel in the fuel tank 1, it can be determined that the liquid fuel is no longer supplied to the oil receiving tray 2 because water or dust has accumulated on the oil filter 10. 10 is displayed indicating that cleaning is required (step 4).

  Thus, by using the detection results of the liquid level detection means 18 and the tank remaining amount detection means 19, it is possible to reliably detect accumulation of water, dust, etc. on the oil filter 10. That is, a means for detecting an abnormality of the oil filter 10 due to accumulation of dust as well as water can be configured only by means used in the combustion apparatus without providing new parts.

  And if a user cleans the oil filter 10 based on a display and installs it again, a combustion apparatus will start a driving | operation normally, and the problem of requesting an unnecessary repair to a store will be prevented.

  Next, a second embodiment of the present invention will be described with reference to the flowchart of FIG. In addition, since the components which comprise a combustion apparatus are the same as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  When the liquid level detecting means 18 detects that the liquid level in the oil receiving tray 2 has become a predetermined value or less (step 1), the remaining amount of liquid fuel in the fuel tank 1 detected by the tank remaining amount detecting means 19 is checked. (Step 2). When the liquid fuel in the fuel tank 1 has run out, it is necessary to replenish the fuel tank 1 with liquid fuel, so that a fuel supply notification is made (step 3).

  On the other hand, when there is liquid fuel in the fuel tank 1, it is conceivable that the liquid fuel is not supplied to the oil receiving tray 2 because water or dust has accumulated on the oil filter 10. However, when the liquid level detecting means 18 malfunctions and there is fuel in the oil receiving tray 2, it is determined that the level is equal to or less than a predetermined value. Therefore, in order to cope with the malfunction of the detection means, the detection result of the flame detection means 9 is checked (step 4). When the flame detection means 9 determines that there is flame, the combustion is continued as it is, and there is no flame. When it is determined, the operation is stopped and the display / operation unit 6 displays that the oil filter 10 needs to be cleaned (step 5).

  More specifically, when liquid fuel is no longer supplied to the oil receiving tray 2 due to accumulation of water and dust on the oil filter 10, the liquid fuel in the oil receiving tray 2 will be completely consumed and burnt if the combustion continues. Stop forcibly. Then, since the flame detection means 9 detects the absence of flame, at this time, it may be notified that the oil filter 10 is abnormal.

  However, if the liquid level detecting means 18 malfunctions and there is fuel in the oil pan 2 (not an abnormality of the oil filter 2), it is determined that the oil level is below a predetermined value. 2, since the liquid fuel is supplied from the fuel tank 1, the flame detection means 9 continues to determine that there is a flame, so that the combustion is continued as it is. Thereafter, if the liquid fuel is consumed as the combustion continues and the remaining amount in the fuel tank 1 decreases, it is determined in step 2 that there is no fuel in the fuel tank 1 and the fuel supply is notified. There is no notification.

  Thus, by adding the step of detecting the presence or absence of a flame to the sequence for determining the abnormality of the oil filter 10, even if the liquid level detection means 18 malfunctions, the abnormality of the oil filter 10 is inadvertently notified. It does not bother the user.

  Therefore, even if a new operation is not required, only the detection results of the flame detection means 9, the liquid level detection means 18, and the tank remaining amount detection means 19 used in the combustion apparatus are used, and even if a malfunction occurs, the oil is detected. It is possible to configure means for distinguishing between the abnormality of the filter 10 and the out of fuel.

It is an internal block diagram of the Example of this invention. It is a figure showing the oil saucer of the Example of this invention. It is the flowchart which showed the control of Example 1 of this invention. It is the flowchart which showed control of Example 2 of this invention.

Explanation of symbols

1 Oil tank 2 Oil tray 5 Burner 9 Flame detection means 10 Oil filter 18 Liquid level detection means 19 Tank remaining amount detection means

Claims (5)

  An oil pan for storing liquid fuel, a liquid level detecting means for detecting the liquid level of the liquid fuel in the oil pan, a fuel tank for supplying fuel to the oil pan, and a remaining amount of liquid fuel in the fuel tank A tank remaining amount detecting means for detecting, and an oil filter for allowing liquid fuel supplied from the oil supply tank to the oil receiving tray to pass therethrough; from the detection results of the liquid level detecting means and the tank remaining amount detecting means, A combustion apparatus characterized by determining an abnormality.   When the liquid level detection means detects that the liquid fuel in the oil tray is less than a predetermined value and the tank remaining amount detection means detects the presence of liquid fuel, it is determined that the oil filter is abnormal. The combustion apparatus according to claim 1.   A burner for burning liquid fuel, a flame detecting means for detecting a combustion state in the burner, an oil receiving tray for storing the liquid fuel, a liquid level detecting means for detecting the liquid level of the liquid fuel in the oil receiving tray, An oil tank for supplying fuel to the oil pan, a tank remaining amount detecting means for detecting the remaining amount of liquid fuel in the oil tank, and an oil filter for passing liquid fuel supplied from the oil tank to the oil pan. And a combustion apparatus for judging an abnormality of the oil filter from detection results of the flame detection means, the liquid level detection means, and the tank remaining amount detection means.   When the liquid level detection means detects that the liquid fuel in the oil pan is below a predetermined value, the tank remaining amount detection means detects the presence of liquid fuel, and the flame detection means detects no flame The combustion apparatus according to claim 3, wherein it is determined that the oil filter is abnormal.   The combustion apparatus according to any one of claims 1 to 4, wherein when the abnormality of the oil filter is determined, notification is made that the oil filter needs to be cleaned.

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