JP3982092B2 - Oil combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil combustion apparatus.
[0002]
[Prior art]
Conventionally, for example, an oil water heater does not use an oil flow sensor that detects the flow rate of oil to be supplied, and the oil calculated according to the required amount of combustion heat (calculated from the water temperature, the incoming water flow rate, the hot water supply set temperature, etc.) The flow rate was adjusted by the fuel supply actuator. In addition, air necessary for combustion is also supplied in accordance with the amount of fuel supplied by adjusting the rotational speed of the blower or adjusting the opening of a damper provided in the air passage.
[0003]
[Problems to be solved by the invention]
However, when the calculated oil flow rate is supplied to the fuel supply actuator with a voltage signal or the like and the oil flow rate is supplied only by feedforward control, due to variations in the product of the fuel supply actuator, There was a possibility that the actual calorific value would shift, and this could cause combustion to fall outside the proper combustion range and generate soot. In addition, there is a problem in that the viscosity of oil is different between winter and summer, and the calorific value deviates from a predetermined calorific value due to a change in the flow rate of the supplied oil.
In addition, even if the fuel supply actuator is adjusted to avoid the above-described problems so as to supply the determined oil flow rate with respect to an arbitrary voltage signal, the gun that sprays and burns the oil is used. In the type burner, there is a problem that it is impossible to supply a predetermined oil flow rate for an arbitrary voltage signal due to radiant heat due to combustion or heat generation of a coil due to energization of an actuator.
On the other hand, it is conceivable to use a type of flow rate sensor that detects the flow rate by rotation of a rotary blade or the like as a flow rate sensor that has been generally used, but in this case, the flow of oil is likely to be disturbed by the rotary blade or the like. There was a problem. Furthermore, the rotation of the rotating blades and the like is easily affected by changes in the specific gravity and viscosity of the oil, and there is a problem that it is difficult to detect an accurate flow rate.
[0004]
Therefore, the present invention eliminates the problems in the conventional oil combustion apparatus described above and can detect the accurate flow rate of the oil supply, thereby accurately supplying the burner with the oil flow rate calculated from the required amount of combustion heat. It is an object of the present invention to provide an oil combustion apparatus capable of performing feedback control so that an accurate oil flow rate can be obtained with respect to a desired oil supply flow rate.
[0005]
[Means for Solving the Problems]
  In order to achieve the above object, an oil combustion apparatus according to the present invention comprises an oil tank.10Oil supply route from30Oil that is sent through, a fuel supply actuator20Adjust the flow rate through the oil burner40Oil combustion equipment that was sent tosoThe oil supply channel30Side heat type flow sensor in the middle of60PlaceShiThe indirectly heated flow sensor60The fuel supply actuator compares the detected oil supply flow rate detected by the fuel and the set supply flow rate calculated in advance corresponding to the required amount of combustion heat.20Controller for feedback control of flow rate adjustment54ProvidedIn things,An oil strainer 70 is provided in the middle of the oil supply path 30 and the indirectly heated flow sensor 60 is provided as a part of the oil strainer 70. The oil strainer 70 connects the oil supply path 30 inside and outside the exterior body 50. A connecting portion constituting body 71 that is provided so as to be in contact with the outside of the outer casing 50 of the oil combustion apparatus, and is attached to the connecting portion constituting body 71 in a detachable manner. 50, and the indirectly heated flow rate sensor 60 includes a main body portion 61 and a circuit portion 63 connected to the main body portion 61 by a lead wire 62. The main body 61 is fitted into the connection portion structure 71 of the oil strainer 70 outside the exterior body 50, and the flow rate in the inner passage 71 c of the connection portion structure 71. And configured to detect, the circuit unit 63 has a configuration in which is disposed inside the outer body 50 receives a signal from the main body portion 61 and a temperature sensor 80 for temperature compensationThis is the first feature.
  In addition to the first feature, the oil combustion apparatus of the present invention is, SideThermal flow sensor60The heating element and the temperature sensing element used as the constituent members of each of the above are configured in a thin film shape, and are laminated close to each other while being separated from each other.SecondIt has the characteristics of
  The oil combustion apparatus of the present invention isIn addition to the first or second feature, the main body 61 of the indirectly heated flow sensor 60Fin plate for heat collection which is a component of61a is an inner passage 71c of the connecting portion structure 71.To arrange to crossThirdAs a feature of.
  MaThe oil combustion apparatus of the present invention is the above first toAny of the third featuresIn addition, the burner is a gun-type burner that sprays and burns oil.4thIt has the characteristics of
  Moreover, the oil combustion apparatus of the present invention comprisesAny of the fourth featuresIn addition, it is configured as a part of a hot water supply device equipped with a water inlet pipe, a hot water outlet pipe, and a heat exchanger.5thIt has the characteristics of
[0006]
  According to the first feature, by disposing the indirectly heated flow rate sensor in the middle of the oil supply path, the oil supply flow rate sent to the burner can be accurately detected. And by using an indirectly heated flow sensor, unlike the case of capacitive sensors such as rotating blades, the flow of the fluid is not greatly disturbed, and the viscosity or specific gravity of the fluid is changed. It is possible to detect an accurate oil flow rate without being affected.
  Also, the oil supply flow rate detected by the indirectly heated sensor is compared with the set oil supply flow rate, and feedback is made to the fuel supply actuator, so that the required oil flow rate can be flowed reliably and accurately. ,AppropriatePreferred combustion within the combustion range can be ensured.
  In addition, since the oil flow rate supplied to the burner can be detected accurately, the required air flow rate is adjusted according to the detected oil flow rate, the rotational speed of the blower is adjusted, or the damper provided in the air flow path It can also be supplied by adjusting the opening.
  AlsoSide heat type flow sensor is oil strayNABy attaching as a part, the number of parts can be reduced. Further, it is not necessary to separately connect the piping and the indirectly heated flow sensor in the oil supply amount, and the number of connecting portions of the piping can be reduced accordingly, so that the probability of oil leakage or the like can be reduced. Also, by attaching an oil strainer or fuel supply actuator to the oil supply line as one component, the indirectly heated flow sensor can be attached to a part of the oil supply line at the same time without any other work. it can.
  The filter part of the oil strainer can be easily replaced from the outside.
  Second aboveAccording to the features aboveFirstIn addition to the effects of the features, the sensitivity and responsiveness as a sensor are improved by forming a heating element, a thermosensitive element, and a thermosensitive element, which are components of the indirectly heated flow sensor, as a thin film and stacking them close to each other.
  the aboveThirdAccording to the characteristics of the main part of the indirectly heated flow sensor, in addition to the operation according to the first or second characteristics,For collecting heat that is a componentFin plateInner passage of the connecting part structureBy arranging to crossInner passage of connecting part structureThe contact area between the oil flowing through and the fin plate can be made sufficiently large,Inner passage (oil supply route)It is possible to accurately collect the heat of the oil flowing through the, and further improve the response and accuracy of flow rate detection by the indirectly heated flow rate sensor.
  4th aboveAccording to the features of the first to the aboveAccording to any of the third featuresIn addition to the action, the burner is a gun-type burner that sprays and burns oil, so even if the characteristics of the spray port change due to the radiant heat of combustion, the heat generated by energizing the fuel supply actuator also causes the oil to burn. Even if there is a change in viscosity, it is not affected by them, ensuring accurate oil flow detection,AppropriateIt becomes possible to perform preferable oil combustion within the combustion range.
  Above 5According to the features of the first to the aboveAccording to any of the fourth featuresIn addition to the action, the oil combustion apparatus of the present invention is configured as a part of the hot water heater, so that the difference between the set hot water temperature and the actual hot water temperature can be quickly eliminated as a hot water heater, It is possible to stably supply hot water.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a combustion apparatus showing an example of an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a hot water supply apparatus using a combustion apparatus showing another example of an embodiment of the present invention, and FIG. FIG. 4 is a partial cross-sectional view showing an example of an indirectly heated flow sensor, FIG. 5 is an indirectly heated flow sensor, and FIG. 4 is a partially sectional view showing an example of an indirectly heated flow sensor used in the combustion apparatus of the present invention. FIG. 6 is a diagram showing another example of attachment of the indirectly heated flow sensor to the oil supply path, and FIG. 6A is a longitudinal view of the oil supply path. FIG. 5B is an attachment diagram of the indirectly heated flow sensor as viewed across the oil supply path. FIG. 7 is a view showing a comparative example with respect to the attachment example of the indirectly heated flow sensor shown in FIG.
[0008]
First, an example of the combustion apparatus of the present invention will be described with reference to FIG.
An oil tank 10 stores petroleum liquid fuel such as kerosene. The oil in the oil tank 10 is guided to the oil burner 40 by the fuel supply actuator 20 through the oil supply path 30 while the flow rate thereof is adjusted, and is used for combustion. The main body of the combustion apparatus excluding the oil tank 10 is covered with an exterior body 50, in which the fuel supply actuator 20 and the oil burner 40 are configured, and a blower 51, a combustion can body 52, an exhaust part 53, A controller 54 and the like are configured. During combustion, it is mixed with air supplied from the blower 51.
[0009]
An indirectly heated flow sensor 60 is provided in the middle of the oil supply path 30. The detected value of the indirectly heated flow sensor 60 is input to the controller 54. The controller 54 compares the detected oil supply flow rate detected by the indirectly heated flow sensor 60 with the set oil supply flow rate D so that the difference disappears. In addition, feedback control is performed on the fuel supply actuator 20.
Further, the controller 54 controls the amount of air blown to the burner 40 by the blower 51 based on the detected oil supply flow rate by the indirectly heated flow sensor 60 so that combustion can be performed in an appropriate combustion range corresponding to the detected oil supply flow rate. Control.
The indirectly heated flow sensor 60 is installed as a part of an oil strainer attached in the middle of the oil supply passage 30 and the oil strainer is connected to the oil supply passage 30 so that the indirectly heated flow sensor 60 is also automatically connected. It is attached to the oil supply path 30. When the indirectly heated flow sensor 60 is attached as a part of the oil strainer, the oil strainer is attached to the outer portion of the exterior body 50 so that the oil strainer filter can be easily exchanged from the outside. The thermal flow sensor 60 is protected so as to be inside the outer package 50.
The indirectly heated flow sensor 60 may be attached as a part of the fuel supply actuator 20. In this case, by attaching the fuel supply actuator 20, the indirectly heated flow sensor 60 is also automatically attached to the oil supply path 30.
[0010]
With reference to FIG. 2, the example provided with the oil combustion apparatus of this invention as a part of hot water supply apparatus is demonstrated.
The oil tank 10 is disposed at a suitable place outside the outer casing 50. On the other hand, the fuel supply actuator 20, the oil burner 40, the blower 51, the combustion can body 52, the exhaust part 53, the controller 54 and the like are configured in the exterior body 50.
An oil strainer 70 attached in the middle of the oil supply path 30 is attached at the position of the exterior body 50.
The oil strainer 70 is provided with an indirectly heated flow sensor 60 (see FIG. 3) that detects the flow rate of oil flowing through the oil supply path 30.
[0011]
The fuel supply actuator 20 includes two electromagnetic pumps 21, 21, two electromagnetic valves 22, 22, a check valve 23, an accumulator 24, and the like, and supplies oil from the oil tank 10 to an oil supply path. 30 is led to the spray nozzle 41 of the oil burner 40 in the direction of the arrow, and is returned to the fuel supply actuator 20 through the return path 31 without spraying a part of the oil supplied to the spray nozzle 41. It is configured.
The flow rate of the oil sprayed from the spray nozzle 41 is a flow rate obtained by subtracting the flow rate flowing through the return path 31 from the flow rate flowing through the spray nozzle 41 in the oil supply channel 30, and this is the actual oil supply flow rate.
[0012]
The oil burner 40 is configured as a gun type burner, and the spray nozzle 41 which is a constituent member thereof is a return type spray nozzle. The oil burner 40 includes an igniter 42, a flame detector 43, and the like in addition to the spray nozzle 41.
The blower 51 is a blower fan, and is provided with a rotation sensor 55 that detects the number of rotations thereof.
A heat exchange coil 56 is disposed in the combustion can body 52, and a water intake pipe 57 and a hot water discharge pipe 58 from a water source (not shown) such as a water supply are connected.
Combustion is started by igniting the oil sprayed into the combustion can body 52 from the spray nozzle 41, and water is supplied from the water intake pipe 57 through the heat exchange coil 56, so that the heated hot water is Hot water is discharged from the hot water pipe 58.
[0013]
The controller 54 controls each component constituting the hot water supply apparatus. That is, when the set hot water supply temperature is set, the controller 54 calculates the required combustion heat quantity from the incoming water temperature, the incoming water flow rate, and the set hot water supply temperature, and sets the required oil supply flow rate as the required oil supply flow rate from the obtained required combustion heat quantity. The flow rate is calculated, and the necessary air volume is calculated for the set oil supply flow rate. The controller 54 controls the fuel supply actuator 20 and the blower 51 in accordance with the set oil supply flow rate. With regard to the operation of hot water supply, when a flow rate equal to or greater than the minimum amount of working water flows through the hot water supply pipe, oil is supplied from the oil tank 10 through the oil supply path 30, and predetermined oil is sprayed from the spray nozzle 41. In addition, a predetermined amount of air is sent from the blower 51 and ignited by the igniter 42 to start combustion.
During operation, the controller 54 inputs the oil supply flow rate information from the indirectly heated flow rate sensor 60 attached to the oil strainer 70 and compares it with the set oil supply flow rate, and feeds back the fuel supply actuator 20 so as to eliminate the difference. Control. Further, the blower 51 is controlled so that the air volume corresponding to the detected actual oil supply flow rate is obtained.
Further, the controller 54 compares the hot water temperature detected by a hot water temperature sensor (not shown) with the set hot water temperature, corrects the set oil supply flow rate from the amount of heat corresponding to the temperature difference, and becomes the corrected set oil supply flow rate. Thus, the fuel supply actuator 20 is controlled.
[0014]
With reference to FIG. 3, the attachment structure of the indirectly heated flow sensor 60 and the oil strainer 70 shown in FIG. 1 or 2 will be described.
The oil strainer 70 includes a connection part structure 71 and a filter part 72. The filter unit 72 includes a transparent case 72a and a filter 72b disposed therein as a double structure. The transparent case 72a can be detachably attached to the connecting portion structure 71, and the filter 72b can be freely taken out from the transparent case 72a for cleaning or replacement. It has been made possible. The filter 72b can be comprised from mesh-like things, such as a wire mesh, for example.
The connecting portion structure 71 includes a block in which a pair of connecting ports 71a and 71b for connecting to the oil supply path 30, an inner passage 71c, and an attaching port 71d for detachably attaching the filter portion 72 are formed. .
The connecting portion constituting body 71 is attached and arranged so as to be in contact with the outside of the exterior body 50, and the connection port 71 b on the downstream side of the oil supply path 30 in the exterior body 50 is formed so as to enter the inside of the exterior body 50. Connected with piping. On the other hand, the connection port 71 a on the upstream side is connected to the piping of the oil supply path 30 outside the exterior body 50. The filter portion 72 is outside the exterior body 50 and can be easily attached and detached from the outside.
The oil supplied through the oil supply path 30 enters from the upstream connection port 71a, passes through the filter portion 72, and further passes through the inner passage 71c and exits from the downstream connection port 71b.
In the filter part 72, foreign substances are removed when the oil passes from the inside to the outside of the filter 72b.
[0015]
An indirectly heated flow sensor 60 and a temperature compensation temperature sensor 80 used when detecting the flow rate by the indirectly heated flow sensor 60 are attached to the connecting portion structure 71 of the oil strainer 70. .
The fitting is provided with fitting recesses 71e and 71f in the thick portion of the block on the side contacting the exterior body 50 of the connecting portion constituting body 71, and is side by side with respect to the fitting recess 71f on the downstream side of the inner passage 71c. The temperature sensor 80 is fitted and fixed to the body 61 of the thermal flow sensor 60 and the fitting recess 71e on the upstream side of the inner passage 71c.
A circuit part 63 is arranged behind the main body part 61 of the indirectly heated flow sensor 60 via a lead wire 62 so that at least the circuit part 63 is arranged inside the exterior body 50. The circuit unit 63 is also connected to the temperature compensation temperature sensor 80 via a lead wire 81.
[0016]
A pair of fitting recesses 71e and 71f are provided on the upstream side and the downstream side of the inner passage 71c, and the bottoms of the recesses 71e and 71f are formed in an open state in the inner passage 71c. As a result, the body portion 61 and the temperature sensor 80 of the indirectly heated flow sensor 60 are watertightly fitted and fixed to the recessed portions 71e and 71f via O-rings or the like, thereby fixing the body portion 61 and the temperature sensor 80 of the indirectly heated flow sensor 60. The heat collecting fin plates 61a and 80a of the temperature sensor 80 are configured to enter the inner passage 71c in a transverse state.
By making the fin plates 61a and 80a penetrate deeply into the inner passage 71c, the heat of the oil passing through the inner passage 71c can be collected accurately and sufficiently.
[0017]
The indirectly heated flow sensor 60 will be described in more detail with reference to FIGS. 4 and 5.
As described above, the indirectly heated flow sensor 60 includes the main body portion 61 and the circuit portion 63. A flow rate detection unit 61b and a wiring board 61d electrically connected to the flow rate detection unit 61b by a bonding wire 61c are embedded in the main body unit 61 with a resin or the like. The wiring board 61 d is electrically connected to the circuit unit 63 by lead wires 62.
As shown in FIG. 3, the fin plate 61 a extending from the flow rate detection unit 61 b is fixed by fitting the main body 61 into the fitting recess 71 f, so that the inside of the connecting portion constituting body 71 of the oil strainer 70 is fixed. It arrange | positions across the channel | path 71c. FIG. 4 shows a cross section of the inner passage 71c and the fin plate 61a. The fin plate 61a is configured as a plate having a certain width in the passage direction of the inner passage 71c, and a tip portion thereof crosses the inner passage 71c and is supported by a fitting groove portion of the inner passage 71c.
[0018]
As shown in FIG. 5, the flow rate detector 61b has an insulating layer B formed on the upper surface of the substrate A, a thin film heating element C formed thereon, and a pair of thin film heating elements C formed thereon. The electrode layer D and E are formed, the insulating layer is formed thereon, the thin film temperature sensing element for detecting the flow rate is formed thereon, and the insulating layer is formed thereon. .
As the substrate A, for example, silicon or alumina having a thickness of about 0.5 mm can be used. As the thin film heating element C, one made of cermet patterned with a film thickness of about 1 μm can be used. As the electrode layers D and H, those made of nickel having a thickness of about 0.5 μm or those obtained by laminating gold having a thickness of about 0.1 μm can be used. Insulating layer B, F, and H are about 1 μm thick SiO₂ As the thin film temperature sensor, a metal resistance film having a large temperature coefficient such as platinum or nickel patterned in a desired shape, for example, a meandering shape, with a film thickness of about 0.5 to 1 μm is used. Can be used. By forming the thin film heating element C and the thin film temperature sensing element close to each other through an insulator, the state of heat generated by the thin film heating element C can be immediately and sensitively received. That is, in the flow rate detection unit 61b, the heat generation of the thin film heating element C is influenced by the endothermic heat of petroleum, which is a non-detection fluid, through the fin plate 61a and is transmitted to the thin film temperature sensing element, and the temperature sensing is executed. The flow rate of oil is detected in the circuit unit 63 from the temperature.
[0019]
The fin plate 61a is made of, for example, copper, duralumin, copper tungsten alloy or the like, and is bonded to the lower surface of the substrate A with a bonding material having good thermal conductivity such as silver paste.
The fin plate 61a has a width dimension in the direction of the inner passage 71c that is sufficiently larger than the thickness dimension, and thereby does not significantly affect the flow velocity of the oil flowing in the inner passage 71c, and the flow rate detector 61b and the flow of the oil. Heat transfer between them can be performed satisfactorily.
[0020]
Although not shown, the temperature compensation temperature sensor 80 includes a chip in which a thin film temperature sensor is formed on a substrate, as in the case of the flow rate detector 61b. 80a is joined.
[0021]
With reference to FIG. 6, FIG. 7, the other example of the attachment to the oil supply path 30 of the indirectly heated flow sensor 60 is demonstrated. With reference to FIG. 6, in this example, the indirectly heated flow sensor 60 is attached from below to a horizontal flow path in the oil supply path 30 (including the oil strainer 70). Then, the heat collection fin plate 61a of the indirectly heated flow sensor 60 is attached so as to protrude from the bottom of the flow path into the flow path. In this case, unlike the case of the heat collection fin plate 61a shown in FIGS. 3 and 4, the heat collection fin plate 61a preferably has its tip not reaching the ceiling of the flow path.
When air or the like enters the oil supply path 30, the oil flowing through the oil supply path 30 is mixed with the bubbles B. Since these bubbles B have a specific gravity lighter than that of oil, they tend to move in the upper layer portion of the flow. Therefore, as in the present invention, the heat collecting fin plate 61a of the indirectly heated flow sensor 60 is projected from the bottom of the flow path into the flow path with respect to the horizontal flow path portion of the oil supply path 30. If provided, even if the bubbles B are mixed in the oil flowing in the oil supply path 30, the bubbles B pass above the heat collecting fin plate 61a without adhering to the heat collecting fin plate 61a. It will be.
When the heat collecting fin plate 61a of the indirectly heated flow sensor 60 is attached to the oil supply path 30 so as to protrude downward from the ceiling portion into the flow path as in the comparative example shown in FIG. When the air bubbles B mixed in the oil supply passage 30 move through the upper layer part of the flow, they easily adhere to the heat collecting fin plate 61a protruding from the ceiling part, which adversely affects the detection of the oil flow rate. .
[0022]
【The invention's effect】
  The present invention comprises the above configuration and action, and according to the oil combustion apparatus of claim 1, the oil tank10Oil supply route from30Oil that is sent through, a fuel supply actuator20Adjust the flow rate through the oil burner40Oil combustion equipment that was sent tosoThe oil supply channel30Side heat type flow sensor in the middle of60PlaceShiThe indirectly heated flow sensor60The fuel supply actuator compares the detected oil supply flow rate detected by the fuel and the set supply flow rate calculated in advance corresponding to the required amount of combustion heat.20Controller for feedback control of flow rate adjustment54ProvidedIn things,An oil strainer 70 is provided in the middle of the oil supply path 30 and the indirectly heated flow sensor 60 is provided as a part of the oil strainer 70. The oil strainer 70 connects the oil supply path 30 inside and outside the exterior body 50. A connecting portion constituting body 71 that is provided so as to be in contact with the outside of the outer casing 50 of the oil combustion apparatus, and is attached to the connecting portion constituting body 71 in a detachable manner. 50, and the indirectly heated flow rate sensor 60 includes a main body portion 61 and a circuit portion 63 connected to the main body portion 61 by a lead wire 62. The main body 61 is fitted into the connection portion structure 71 of the oil strainer 70 outside the exterior body 50, and the flow rate in the inner passage 71 c of the connection portion structure 71. And configured to detect, the circuit unit 63 has a configuration in which is disposed inside the outer body 50 receives a signal from the main body portion 61 and a temperature sensor 80 for temperature compensationSo
  By arranging the indirectly heated flow rate sensor in the oil hot water supply path, the oil supply flow rate sent to the burner can be detected accurately and with good responsiveness. And by using an indirectly heated flow sensor, unlike the case of capacitive sensors such as rotating blades, the flow of the fluid is not greatly disturbed, and the viscosity or specific gravity of the fluid is changed. It is possible to detect an accurate oil flow rate without being affected.
  MaTakoThe controller can compare the oil supply flow rate detected by the indirectly heated flow sensor with a responsive response to the set oil supply flow rate, and perform feedback control on the fuel supply actuator. Can flow reliably and accurately,AppropriatePreferred combustion within the combustion range can be ensured.
  MaBesideThe thermal flow sensor is an oil stray installed in the middle of the oil supply path.To naOn the other hand, because it was attached as a part of it,
  Side heat type flow sensor is oil strayWith naNeed not be handled as a separate part, and the number of parts can be reduced. Also, in the oil supply line, the piping and the indirectly heated flow sensor are connected to the oil stray.With naIn addition, it is not necessary to connect separately, and accordingly, the number of pipe connections can be reduced, and the probability of oil leakage and the like can be reduced. Also, oil stray as one partNaBy attaching to the supply line of the oil supply path, the indirectly heated flow sensor can also be attached to a part of the oil hot water supply line without any other work at the same time..
  AlsoThe oil strainer filter can be easily replaced from the outside.The
  AlsoClaim 2According to the oil combustion apparatus described in the above,Claim 1In addition to the effects of the configuration described in, indirectly heated flow sensor60Since the heating element and the temperature sensing element used as the constituent members are each formed in a thin film shape and are laminated close to each other in a state of being separated from each other,
  Sensitivity and responsiveness as an oil flow sensor can be sufficiently improved, and an accurate flow rate can be detected quickly.
  AlsoClaim 3According to the oil combustion apparatus described in claim 1 above,Or 2In addition to the effects of the configuration described in, indirectly heated flow sensor60 body parts 61Fin plate for heat collection which is a component of61a is an inner passage 71c of the connecting portion structure 71.Because it was arranged to cross
  Inner passage of connecting part structureThe contact area between the oil flowing through and the fin plate can be made sufficiently large,Inner passage (oil supply route)It is possible to accurately collect the heat of the oil flowing through the, and further improve the response and accuracy of flow rate detection by the indirectly heated flow rate sensor.
  Claim 4According to the oil combustion apparatus according to claim 1 to claim 1 above.3In addition to the above-described effects by the configuration described in any of the above, since the burner is a gun type burner that sprays and burns oil,
  Even if the characteristics of the spray nozzle change due to the radiant heat of combustion, or when the viscosity of the oil changes due to the heat generated by energizing the fuel supply actuator, the exact flow rate of the oil is not affected by it. Ensure detectionAppropriateIt becomes possible to perform preferable oil combustion within the combustion range.
  Claim 5According to the oil combustion apparatus according to claim 1 to claim 1 above.4In addition to the effects of the configuration described in any of, EnterSince it is configured as part of a hot water supply device equipped with a water pipe, a hot water pipe, and a heat exchanger,
  Since the oil combustion apparatus of the present invention is configured as a part of the water heater,
  As a water heater, the difference between the set hot water temperature and the actual hot water temperature can be quickly eliminated, and hot water at the set temperature can be quickly and stably supplied.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a combustion apparatus showing an example of an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of a hot water supply apparatus using a combustion apparatus showing another example of the embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an example in which an indirectly heated flow sensor used in the combustion apparatus of the present invention is attached to an oil strainer.
FIG. 4 is a partial cross-sectional view showing an example of an indirectly heated flow sensor.
FIG. 5 is an exploded perspective view of the laminated structure inside the flow rate detection unit of the indirectly heated flow rate sensor.
FIG. 6 is a diagram showing another example of attaching the indirectly heated flow sensor to the oil supply path.
7 is a view showing a comparative example with respect to the attachment example of the indirectly heated flow sensor shown in FIG. 6. FIG.
[Explanation of symbols]
10 Oil tank
20 Fuel supply actuator
30 Oil supply channel
40 Oil burner
41 Spray nozzle
50 exterior body
51 Blower
52 Combustion can body
53 Exhaust section
54 controller
60 indirectly heated flow sensor
61 Body
61a Fin plate
62 Lead wire
63 Circuit part
70 Oil strainer
71 Connecting part structure
71c Inside passage
72 Filter section
80 Temperature sensor
C Thin film heating element
G Thin film temperature sensor
B bubble

Claims (5)

An oil combustion apparatus in which the flow of oil sent from the oil tank 10 through the oil supply path 30 is adjusted via the fuel supply actuator 20 and sent to the oil burner 40 for combustion. An indirectly heated flow sensor 60 is disposed in the middle of the oil supply path 30 , and the detected oil supply flow rate detected by the indirectly heated flow sensor 60 is compared with the set supply flow rate calculated in advance corresponding to the required amount of combustion heat. in those provided controller 54 for feedback control of the flow rate adjusted to the fuel supply actuator 20,
An oil strainer 70 is provided in the middle of the oil supply path 30 and the indirectly heated flow sensor 60 is provided as a part of the oil strainer 70.
The oil strainer 70 includes an inner passage 71c that connects the oil supply path 30 inside and outside the outer casing 50, and a connecting portion structure 71 that is attached to the outer casing 50 of the oil combustion apparatus so as to be in contact with the outer side. A filter part 72 that is detachably attached to the connecting part constituting body 71 and is arranged outside the exterior body 50,
The indirectly heated flow sensor 60 includes a main body portion 61 and a circuit portion 63 connected to the main body portion 61 by a lead wire 62, and the main body portion 61 is disposed outside the outer body 50 with the oil. It is configured to detect the flow rate in the inner passage 71c of the connection portion structure 71 by being fitted into the connection portion structure 71 of the strainer 70, and the circuit portion 63 is disposed inside the exterior body 50 and is connected to the main body portion. 61 and oil combustion apparatus being characterized in that a configuration for receiving a signal from a temperature sensor 80 for temperature compensation. 2. The heating element and the temperature sensing element used as the constituent members of the indirectly heated flow sensor 60 are each formed in a thin film shape and are closely stacked in a state of being separated from each other. Oil burning equipment. The heat collecting fin plate (61a), which is a constituent member of the main body part (61) of the indirectly heated flow rate sensor (60), is disposed so as to cross the inner passage (71c) of the connecting part constituting body (71). The oil combustion apparatus described in 1. The oil combustion apparatus according to any one of claims 1 to 3, wherein the burner is a gun type burner that sprays and burns oil. The oil combustion apparatus according to any one of claims 1 to 4, wherein the oil combustion apparatus is configured as a part of a hot water supply apparatus including a water inlet pipe, a hot water outlet pipe, and a heat exchanger .

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