JP2008170135A - Liquid fuel combustion apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid fuel combustion apparatus capable of stabilizing operation at ignition conformed to the actual residual amount of fuel by changing the operation control of an electromagnetic pump and a carburetor at ignition according to the residual amount of fuel. <P>SOLUTION: When igniting, a control device corrects time from the operation of the electromagnetic pump until the injection start of fuel gas according to the amount of residual fuel in an fuel feeding tank. When the amount of residual fuel in the fuel feeding tank is large (the fuel level height is high) in determination of S3, time elapsed until supplying to the carburetor from the operation start of the electromagnetic pump is short. Time (T1 in S5) until the carburetor is operated to inject fuel gas is thereby made shorter than time (T2 in S15) when the amount of residual fuel in the fuel feeding tank is small. The temperature of the carburetor at actual ignition is almost constant regardless of the amount of residual fuel, and the supply amount of fuel to the carburetor is almost constant. An ignition state is thereby stable. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid fuel combustion apparatus mounted on an oil fan heater or the like.

  FIG. 5 is a schematic front view of a petroleum fan heater equipped with a conventional liquid fuel combustion apparatus, and FIG. 6 is a schematic view of the liquid fuel combustion apparatus. As shown in the figure, the oil fan heater main body (hereinafter abbreviated as “main body”) 1 is formed in a box shape and is detachably provided with a front plate 2 and a top plate formed integrally with a side surface. 3, an operation unit 4 for operating a driving operation, a blowout port 5 for blowing out warm air, and an openable / closable lid 7 for taking in and out the fuel tank 6 on the upper right side of the top plate 3. In the unlikely event that liquid fuel leaks from the fuel supply system such as the fuel tank 6, the main body 1 is placed and fixed on the mounting table 8.

  As shown in FIGS. 5 and 6, the inside of the main body 1 has a function of accommodating a tank accommodating chamber 1 a that accommodates the fuel tank 6, a vaporizer 12, an electromagnetic pump 13, and the like by the tank guide 11 and the partition plate 16. It is divided into a component housing chamber 1b and a combustion chamber 1c in which the burner 14 and the combustion chamber 15 are arranged.

  In the tank storage chamber 1a, a removable cartridge-type fuel tank 6 for temporarily storing fuel, and an oil feed path 300 for feeding fuel from the fuel tank 6 to the vaporizer side and the fuel tank 6 are detachable. The oil supply side connection means 9 and 10 to be connected, and the return oil side connection means 21 and 22 for detachably connecting the return oil path 301 for returning the fuel gas from the vaporizer 12 side to the oil supply tank 6 and the oil supply tank 6 are provided. Has been placed. At the bottom of the tank storage chamber 1a, there is provided a mounting table 1d having a cushioning property that absorbs and relieves shock applied to the connecting means 9, 10 and 21, 22 when the fuel tank 6 is stored. Further, a guide portion is formed in the tank storage chamber 1a so that the oil supply side connection means 9, 10 and the return oil side connection means 21, 22 are securely connected when the oil supply tank 6 is stored. It is preferable to leave.

  The oil supply side connection means 9 and 10 are composed of an oil supply joint 9 having a built-in suction pipe and a valve for opening and closing the passage, and an oil supply joint receiver 10 for receiving the valve of the oil supply joint 9. The oil feed joint receiver 10 is connected with an air valve 20 that takes air into the oil feed path in order to shut off the oil feed path 300 supplied from the fuel tank 6 to the electromagnetic pump 13. The oil feeding joint receiver 10 is attached to the wall surface of the tank guide 11 whose upper part protrudes toward the functional component storage chamber 1b.

  As shown in FIG. 5, the functional component storage chamber 1b is disposed between the tank storage chamber 1a and the combustion section chamber 1c, and includes a vaporizer 12 that vaporizes fuel from the fuel tank 6, and a fuel tank. An electromagnetic pump 13 for sending fuel from 6 to the vaporizer 12 is accommodated.

  The combustion chamber 1c is partitioned by a partition plate 16, and a burner 14 that mixes and burns fuel gas vaporized by the vaporizer 12 and primary combustion air, a combustion chamber 15 that surrounds the burner 14, and a burner 14 An accommodating burner box 17 is accommodated.

  The oil feeding path 300 includes a pipe 203 that connects the oil feeding joint receiver 10 and the electromagnetic pump 13, and a pipe 204 that connects the electromagnetic pump 13 and the vaporizer 12. The return oil path 301 includes a pipe 207 that connects the vaporizer 12 and the return oil joint receiver 10. These pipes 203 to 207 are all formed of a copper pipe.

  The configuration of the fuel tank 6 will be described with reference to FIGS. 7 is a schematic view of a fuel tank 6 used in the oil fan heater shown in FIG. 5, FIG. 8 is a perspective view showing a connecting portion of the fuel tank 6 shown in FIG. 7, and FIG. FIG. 10 is a structural view of the return oil joint 9. As shown in FIGS. 7 and 8, the fuel tank 6 is formed on the surface on which the handle 23 is provided and the handle 23 installed on the upper surface of the fuel tank 6 for carrying the fuel. An oil supply port 26 for fuel supply, an oil supply cap 24 with a pressure valve that closes the oil supply port 26 so as to be openable and closable, and an oil that is provided on a side surface close to the oil supply cap 24 so that the state in which fuel is supplied can be visually recognized. On the upper surface where the meter 25 and the handle 23 are provided, an oil feeding joint 9 and a return oil joint 21 arranged on the opposite side of the oil filler 26 are provided.

  As shown in FIG. 9, the oil feeding joint 9 includes a horizontal L-shaped connecting pipe 43 projecting from the upper surface of the fuel tank 6 to the side of the tank, and a spindle type valve mechanism 28 provided at the tip of the connecting pipe 43. And a built-in joint body 9a. The joint main body 9a is formed in a vertical cylindrical shape, and a cylindrical small-diameter protruding cylinder 9b fitted to the oil feeding joint receiver 10 side is formed on the lower surface thereof, and an O-ring 41 for connection sealing is provided on the outer peripheral portion. It fits closely. A lid nut 38 that can be opened and closed for inserting the valve mechanism 28 is screwed into the upper end opening of the joint body 9a.

  The valve mechanism 28 in the joint body 9a has a spindle-like shape that can be freely attached to and detached from the central valve hole 9c of the small-diameter protruding cylinder 9b of the joint body 9a and the inverted conical valve seat 9d formed in the lower part of the joint body 9a. The valve body 31, a spring 35 interposed between the upper end of the valve body 31 and the lid nut 38 and biasing the valve body 31 in the valve closing direction, and the valve seat side peripheral surface of the valve body 31 are fitted. The sealing O-ring 33 is provided, and the lower end of the valve element 31 protrudes downward from the small-diameter protruding cylinder 9b when the valve is closed.

  The connection pipe 43 is formed therein with a suction passage 43a communicating with the valve chamber in the joint body 9a, and an end portion protruding to the tank side is integrally connected to a side portion of the joint body 9a. . The lower end portion of the connection pipe 43 is inserted into the oil tank 6 from the insertion hole 46 on the upper surface of the oil tank 6, and a flange 43 b formed at the lower portion is screwed into the hole 47 on the upper surface of the oil tank 6 through the rubber packing 50. It is fixed by. A male screw is formed on the outer peripheral surface of the lower end portion of the connection pipe 43, and the upper end of the suction pipe 27 in the oil supply tank 6 is screwed to the male screw. The suction pipe 27 reaches near the bottom surface of the fuel tank 6, and a filter 45 that prevents water and dust from passing through a suction port 44 formed at the lower end thereof. The suction port 44 may be provided on a side surface other than the bottom bottom surface of the suction pipe 27.

  As shown in FIG. 8, the return oil joint 21 is provided side by side on the upper surface of the oil supply tank 6 together with the oil supply joint 9 and is basically the same as the oil supply joint 9 except that the suction pipe 27 is not connected. The structure is similar. Accordingly, the structure thereof will be briefly described. As shown in FIG. 10, the return oil joint 21 includes a horizontal L-shaped connection pipe 30 projecting from the upper surface of the oil supply tank 6 toward the tank side, and the tip of the connection pipe 30. And a joint body 21a having a built-in spindle type valve mechanism 29.

  The joint body 21a is formed in a vertical cylindrical shape, and a cylindrical small-diameter protruding cylinder 21b is formed on the lower surface of the joint main body 21a so as to be fitted to the oil joint receiver 22 side. It fits closely. A lid nut 40 that can be opened and closed for inserting the valve mechanism 29 is screwed into the upper end opening of the joint body 21a. The valve mechanism 29 in the joint body 21a has a spindle-like shape that can be freely attached to and detached from the central valve hole 21c of the small-diameter protruding cylinder 21b of the joint body 21a and the inverted conical valve seat 21d formed in the lower part of the joint body 21a. The valve body 32, a spring 36 interposed between the upper end of the valve body 32 and the lid nut 40 and biasing the valve body 32 in the valve closing direction, and the valve seat side peripheral surface of the valve body 32 are fitted. The sealing O-ring 34 is provided, and the lower end of the valve element 32 protrudes downward from the small-diameter protruding cylinder 21b in the closed state.

  The connecting pipe 30 is formed therein with a return passage 30a communicating with the valve chamber in the joint main body 21a, and an end portion protruding to the tank side is integrally connected to a side portion of the joint main body 21a. . The lower end portion of the connecting pipe 30 is inserted into the oil tank 6 from the insertion hole 48 on the upper surface of the oil tank 6, and the flange 30 b formed at the lower part is screwed into the hole 49 on the upper surface of the oil tank 6 through the rubber packing 51. It is fixed by screws.

  The oil feeding joint 9 and the return oil joint 21 are both configured such that the valve bodies 31 and 32 of the joint body are set downward and arranged at the same level, and the oil feeding joint receiver 10 and the oil feeding joint receiver 10 and the oil feeding joint receiver 10 arranged upward are opposed to these. The return oil joint receiver 22 is fitted and connected in the vertical direction. Therefore, both the joints 9 and 21 can be smoothly connected to the joint receivers 10 and 22 only by mounting the oil supply tank 6 including the oil feeding joint 9 and the return oil joint 21 from above the tank chamber 1a. It has become.

  FIG. 11 is a longitudinal sectional view of an oil supply cap portion used in the oil fan heater shown in FIG. As shown in the drawing, the oil supply cap 24 with a pressure valve includes a cap main body 53 that is screwed into an oil supply port 26 threaded on the outer side of the base on the upper surface of the oil supply tank 6, and a pressure valve provided at the center of the bottom surface of the main body 53. A mechanism 54 and a rubber packing 55 arranged on the bottom surface of the main body 53 and in contact with the upper surface of the base of the oil supply port 26 are provided. A hole 56 for releasing pressure is formed in the center of the bottom surface of the cap body 53, so that the rise of the oil level due to the air pressure in the tank due to the temperature difference of the fuel is eliminated, and the fuel suction by the electromagnetic pump 13 can be performed smoothly. ing. The side surface of the cap body 53 is threaded, and the end is curled. The rubber packing 55 serves as a seal between the oil supply port 26 and the cap body 53, and a pressure release hole 57 for releasing pressure is formed at the center thereof. The pressure valve mechanism 54 is interposed between the valve body 58 that opens and closes the hole 56 of the cap body 53 and the bottom surface of the body 53 and the periphery of the valve body 58 in order to bias the valve body 58 in the valve opening direction. The spring 59 is formed.

  FIG. 12 is a structural diagram of the oil feeding side connection means 9 and 10 applied to the fuel tank 6 shown in FIG. 5, and FIG. 13 is a structural diagram of an oil feeding joint receiving portion similarly applied to the fuel tank 6 shown in FIG. FIG. 14 is a longitudinal sectional view showing the structure of the return oil side connecting means applied to the oil tank 6 shown in FIG. As shown in FIGS. 5 to 8, in the tank storage chamber 1 a, the oil supply joint receiver 10 and the return oil joint receiver 22 face the lower side of the oil supply joint 9 and the return joint 21 in the tank storage state of the oil supply tank 6. Is arranged. As shown in FIG. 12, the oil feeding joint receiver 10 has a circular cross section that allows insertion of a small-diameter protruding cylinder 9 b (FIG. 9) that opens on the upper surface of a cylindrical receiving body 10 a and serves as the lower end of the oil feeding joint 9. , And a valve mechanism 60 that opens and closes by contact pressure / separation with the valve body 31 of the valve mechanism 28 of the oil feeding joint 9.

  An annular sealing surface 67 is formed at the upper end of the concave receiving portion 61 so as to be in close contact with the periphery of the small diameter protruding cylinder 9b of the oil feeding joint 9. Further, a valve receiver housing portion 68 is recessed in the bottom surface of the concave receiving portion 61, and a valve receiver 65 is fitted into the valve receiver housing portion 68. The valve receiver 65 is formed with a valve hole 60b (see FIG. 13) communicating with a valve chamber 60a formed in the lower portion of the receiving body 10a, and a lattice-shaped passage 66 through which fuel flows is formed around the valve hole 60b.

  As shown in FIG. 12 and, preferably, FIG. 13, the valve mechanism 60 includes a valve body 62 that can be freely attached to and detached from the valve seat of the valve chamber 60a and whose upper end passes through the valve hole 60b and protrudes toward the concave receiving portion 61. A spring 63 that is interposed between the head of the valve body 62 and the valve receiver 65 and biases the valve body 62 in the valve closing direction (upward in the figure), and is fitted on the valve chamber 60a side of the valve body 62. And an O-ring 64 that seals between the valve seat and the valve seat. The valve mechanism 60 is opened by the valve body 31 of the oil feeding joint 9 contacting the head of the valve body 62 on the oil feeding joint receiver 10 side (contacting pressure downward in the drawing). The valve is closed by separating from the head. A passage 69 communicating with the pipe 203 connected to the electromagnetic pump 13 is formed in the lower portion of the valve chamber 60a of the receiving body 10a, and a passage 70 of the air valve 20 is communicated with the side portion of the valve chamber 60a. Has been.

  The air valve 20 is provided to take in the air that shuts off fuel in the oil feeding path 300 from the fuel tank 6 to the electromagnetic pump 13 into the oil feeding path 300, and is arranged in the air intake passage of the valve body. A valve element 20a, an electromagnetic coil 20b that is disposed on the outer periphery of the valve body and moves the valve element 20a in the valve closing direction of the passage 70 by excitation thereof, and a spring 20c that urges the valve element 20a in the valve opening direction. ing. The operation of the air valve 20 plays a role of taking in air that shuts off the fuel in the oil feeding path 300 while the air valve 20 is in a closed state during operation and is in an open state during a stop. The air valve 20 also serves to suck air in an open state when the carburetor 12 is cleaned, and to drive the electromagnetic pump 13 to send air to the carburetor 12.

  On the other hand, the return oil joint receiver 22 basically has the same structure as the oil feed joint receiver 10 except that the air valve 20 provided in the oil feed joint receiver 10 does not exist. Therefore, the structure of the return oil joint receiver 22 will be briefly described. As shown in FIG. 14, the return oil joint receiver 22 is provided with a concave receiver 72 formed on the upper surface of the receiver main body 22a, and the return oil joint 72 disposed on the concave receiver 72. 21 is provided with a valve mechanism 71 that opens and closes by contact pressure / separation with the valve body 32 of the 21 valve mechanism 29. An annular sealing surface 78 is formed at the upper end of the concave receiving portion 72, and a valve receiver 76 is fitted into a valve receiving accommodating portion 79 provided in a recessed manner on the bottom surface of the concave receiving portion 72. The valve receiver 76 has a valve hole 71b communicating with the lower valve chamber 71a of the receiving body 22a, and has a lattice-shaped passage 77 through which fuel flows.

  The valve mechanism 71 includes a valve body 73 which can be freely attached to and detached from the valve seat of the lower valve chamber 71 a and whose upper end passes through the valve hole 71 b and protrudes toward the concave receiving portion 72, and the head of the valve body 73 and the valve receiver 72. A spring 74 that is interposed between the valve body 73 and urges the valve body 73 in the valve closing direction (upward in the figure); The valve body 32 of the return oil joint 21 is opened by contacting the head of the valve body 73 on the receiving side, and is closed by being separated from the head of the valve body 73. A passage 80 communicating with the pipe 207 connected to the solenoid valve 84 is formed in the lower portion of the valve chamber 71a of the receiving body 22a.

  In the configuration of the oil supply tank 6 and the connection means 9, 10, 21, and 22, when the oil supply tank 6 is set from above in the tank housing chamber 1 a of the main body 1, the oil supply joint 9 and the return oil joint 21 of the connection means are connected to each other. The O-rings 41 and 42 which are mounted at predetermined positions of the oil joint receiver 10 and the return oil joint receiver 22 and are outside the small-diameter protruding portions 9b and 21b of the joint bodies 9a and 21a are the seal surfaces 67 of the oil-feed joint receiver 10. And is sealed by the sealing surface 78 of the return oil joint receiver 22. At the same time, the valve mechanisms 28 and 29 of the joints and the valve bodies of the receiving side valve mechanisms 60 and 71 are pressed against each other, thereby opening the valve.

[Configuration of vaporizer and burner]
FIG. 15 is a configuration diagram of the vaporizer and burner portion of the oil fan heater shown in FIG. As illustrated, the vaporizer 12 includes a vaporizing element 81 that heats and vaporizes the fuel, a nozzle 82 that ejects the fuel gas vaporized by the vaporizing element 81, a needle 83 that opens and closes a hole in the nozzle 82, A solenoid valve 84 connected to the needle 83 to move the needle 83, a fuel inlet 85 for supplying fuel to the vaporizing element 81, a return circuit 86 for sending fuel gas inside the vaporizer 12 when the operation is stopped, and a burner 14 It is comprised from the heat recovery part 87 which collect | recovers combustion heat. The vaporizing element 81 is obtained by sintering fine ceramic particles into a cylindrical shape, and tar generated when the fuel is vaporized is deposited from the surface of the vaporizing element 81 toward the inside. The fuel inlet 85 of the carburetor 12 has a double structure of an outer stainless pipe 88 and an inner copper pipe 89. The reason for using the stainless steel pipe 88 is to reduce the heat conduction from the carburetor 12 and suppress the temperature rise of the fuel entering the carburetor 12. Further, the diameter of the stainless steel pipe 88 is larger than that of the copper pipe 89, and the heat conduction from the stainless steel pipe 88 to the copper pipe 89 is further suppressed. Note that the tip of the copper pipe 89 extends to a position outside the vaporizer 12.

  The solenoid valve 84 includes an electromagnetic coil 90, a movable piece 91, a suction piece 92, and a pressing spring 93, and the movable piece 91 is attracted to the suction piece 92 by energization / non-energization of the electromagnetic coil 90. The needle 83 attached to the movable piece 91 moves away and opens and closes the hole of the nozzle 82 of the vaporizer 12. The burner 14 includes a mixing pipe 94 that mixes the combustion gas vaporized by the vaporizer 12 and the primary combustion air, and a flame port 95 that burns the mixed combustion gas.

[Configuration of electromagnetic pump]
As shown in FIG. 6, the electromagnetic pump 13 sucks up fuel in the fuel tank 6 and supplies it to the carburetor 12 side. The electromagnetic pump 13 is interposed in the oil feeding path 300 and is controlled by a control device 151 described later. The fuel discharge amount is controlled.

[Configuration of control device]
FIG. 16 is a configuration block diagram of a control device 151 that mainly controls the discharge amount of the electromagnetic pump 13. The control device 151 is composed of a microcomputer incorporating a CPU, ROM, and RAM inside, and includes a switch determination means 151 a for determining the set temperature from the indoor temperature setting switch 157 and the oil level detection device 150 for the oil tank 6. Oil level determination means 151b for determining the input of the oil level detection signal, room temperature determination means 151c for determining the input of the room temperature signal from the room temperature sensor 153 as the indoor temperature detection means, and the oil temperature detection sensor 152 in the oil tank 6 An oil temperature determining means 151d for determining the input of an oil temperature detection signal; a correcting means 151e for storing a correction value (correction coefficient) corresponding to an oil level (residual oil amount), fuel temperature, and combustion amount, which will be described later; Based on the determination results from the determination means 151a to 151d and the correction value data from the correction means 151e, the discharge amount of the electromagnetic pump is calculated. And parts 154, and a control unit 155 for outputting an optimum fuel discharge amount based on the calculation result to the drive circuit 156 of the electromagnetic pump 13.

[Operation of oil fan heater]
The operation of the oil fan heater will be described. After opening the lid 7 of the main body 1 and taking out the empty fueling tank 6 by holding the handle 23 of the fueling tank 6, the oiling cap 24 with a pressure valve is loosened and removed with the handle 23 facing upward. Fuel is supplied from an oil supply port 26 of the tank 6. When the refueling is completed, the fuel tank 6 filled with the fuel is set to a predetermined position by opening the lid 7 of the main body 1. Then, as shown in FIGS. 12 and 14, the valve bodies 31 and 32 of the valve mechanism 28 of the oil supply joint 9 of the oil supply tank 6 and the valve mechanism 29 of the return oil joint 21 are connected to the valve of the oil supply joint receiver 10. The valve bodies 62 and 73 of the valve mechanism 71 of the mechanism 60 and the return oil joint receiver 22 are pressed, and the valve bodies 62 and 73 are lowered. When the heads 62a and 73a of the valve bodies 62 and 73 hit the upper surface of the valve receivers 61 and 72, the valve bodies 31 and 32 of the valve mechanism 28 of the oil feeding joint 9 and the valve mechanism 29 of the return oil joint 21 are moved upward. The springs 35 and 36 that have been urged in the valve closing direction are compressed, and the closing surfaces O-rings 33 and 34 of the valve bodies 31 and 32 close the oil feeding joint 9 and the return oil joint 21, respectively. A gap is formed between the two surfaces and the oil feed path 300 through which fuel flows to the electromagnetic pump 13 side and the return oil path 301 from the vaporizer 12 to the fuel tank 6 are opened.

  When the operation switch (not shown) of the oil fan heater is operated to turn on the power, the vaporizer 12 is heated by the vaporizer heater (not shown) attached to the vaporizer 12. At this time, the temperature of the vaporizer 12 is detected by a vaporizer thermistor (not shown), and when the vaporizer 12 is heated to a predetermined temperature (preheating completion temperature), the electromagnetic pump 13 is driven to supply the fuel tank 6. The liquid fuel inside is sucked up, sucked up through the suction pipe 27, and sent to the vaporizer 12 through the oil feeding joint 9 and the oil feeding joint receiver 10. The liquid fuel is gasified by the heated carburetor 12, blown out from the flame port 95 of the burner 14, ignited in the flame port 95, and burned in the combustion chamber 15.

  At this time, the controller 151 controls the drive of the electromagnetic pump 13 based on the difference between the room temperature detected by the room temperature sensor 153 (thermistor) and the set temperature set by the room temperature setting switch 157 of the operation unit 4, and the vaporizer By changing the amount of liquid fuel sent to 12, the amount of heat generated by combustion is adjusted appropriately. When combustion starts and the flame sensor (see 114 in FIG. 17; flame sensor) detects a flame current (flame current) that is equal to or higher than a preset current value, the fan motor is energized and the blower fan rotates to draw room air. Inhale. The rotation speed is controlled by the control device 151. The sucked indoor air takes away the radiant heat obtained in the combustion chamber 15 and blows out with the combustion gas as warm air to the outside (indoor) of the main body 1 from the outlet 5 to increase the indoor temperature at the optimum temperature. Control.

  Here, the operation at the time of ignition of the Bunsen liquid fuel combustor will be described in more detail. When the carburetor 12 reaches the preheating completion temperature, the electromagnetic pump 13 starts operation, and at the same time, the air valve (air valve) 20 in the oil supply path is closed, and oil suction starts from the suction pipe 27 of the fuel tank 6. , And supplied to the vaporizer 12. The solenoid valve 84 to which the needle 83 that has closed the nozzle 82 of the vaporizer 12 has been turned on since the operation of the electromagnetic pump 13 is turned on, the needle 83 is retracted, the nozzle 82 is opened, and the vaporized gas is ejected to the burner 14. Is done. The vaporized gas blown out from the flame port 95 of the burner 14 is ignited by the ignition means. When ignited, a flame current flows between the frame sensor 114 installed above the flame mouth 95 of the burner 14 and the flame mouth 95 of the burner 14. When the flame current value reaches a predetermined value or more, it is determined that the ignition has been completed, and combustion is continued. For several tens of seconds after the nozzle 82 is opened and the vaporized gas is ejected, the combustion is forcibly maintained even if the flame current value does not reach the predetermined value. This is called forced retention time. If the flame current value does not reach the predetermined value within this forced holding time, it is determined that ignition has failed and combustion is stopped.

最大出力は機器の仕様として決定される（石油ＦＨの場合機種名の数字が最大出力
（ＫＷ）を示す）。ここで機器の出力をＱ（ＫＷ）、燃料消費量をＡ（Ｌ／ｈ）とすると、灯油の場合には比重０．８、発熱量１１０６０Ｋｃａｌ／Ｋｇ、１ＫＷ＝８６０Ｋｃａｌ／ｈであるので、
Ｑ＝Ａ×０．８×１１０６０／８６０＝１０．２８８４Ａ
即ち、Ａ＝Ｑ／１０．２８８４となる。 If the operation is continued, as shown in FIG. 7, the fuel in the fuel tank 6 decreases, and the oil level detecting device 150 provided in advance at a predetermined position in the fuel tank 6 detects and operates at each predetermined position. Then, the determination result is sent to the calculation unit 154. Further, the temperature detected by the oil temperature detection sensor (thermistor) 152 that detects the temperature of the fuel in the fuel tank 6 is also sent to the calculation unit 154. Further, based on the difference between the room temperature detected by the room temperature sensor 153 and the set temperature set by the indoor temperature setting switch 157 of the operation unit 4, combustion amount data corresponding to the drive signal sent from the control unit 155 to the electromagnetic pump 13 is obtained. It is sent to the calculation unit 154. These data are calculated by the calculation unit 154 as a normal combustion amount by the following calculation formula, and based on the calculation result, the electromagnetic pump 13 is controlled to have an optimum discharge amount.
Regular combustion amount = Combustion amount * (A * B * C)
A is a correction value (correction coefficient) based on the residual oil amount (for example, the oil level height) of the fuel in the fuel tank 6 and is set to a correction value as shown in Table 1 according to the residual oil amount.
B and C are correction values as follows, but may not be considered.
B is a correction value (correction coefficient) of the fuel temperature in the fuel tank 6 and is set to a correction value as shown in Table 2 according to the fuel temperature.
C is a correction value (correction coefficient) of the combustion amount, which is a correction value as shown in Table 3 according to the combustion amount based on the difference between the room temperature detected by the room temperature thermistor and the set temperature.

The maximum output is determined as a specification of the device (in the case of petroleum FH, the number of the model name indicates the maximum output (KW)). Here, if the output of the device is Q (KW) and the fuel consumption is A (L / h), in the case of kerosene, the specific gravity is 0.8, the calorific value is 11060 Kcal / Kg, and 1 KW = 860 Kcal / h.
Q = A × 0.8 × 11060/860 = 10.2884A
That is, A = Q / 10.2884.

  In the calculation unit 154 of the control device 151, a command is sent from the control unit 155 to the drive circuit 156 of the electromagnetic pump 13 for the normal combustion amount calculated based on the above calculation formula, and the voltage to the electromagnetic pump 13 is calculated based on the calculation formula. A voltage corresponding to the calculated normal combustion amount is changed and applied, and the electromagnetic pump 13 sucks up the fuel in the fuel tank 6 and sends it to the carburetor 12. The heated and vaporized fuel is sent to the burner 14 and burned. Thus, by sucking up the fuel in the fuel tank 6 by the electromagnetic pump 13, the fuel in the fuel tank 6 is reduced, that is, the pump head capacity is reduced by changing the height of the oil level, and the electromagnetic pump 13 Since the discharge amount decreases, the normal combustion amount (discharge amount) of the electromagnetic pump 13 is sucked up from the fuel tank 6 and sent to the carburetor 12 by correcting according to the height of the oil level in the fuel tank 6. be able to. The calculation of the height of the fuel level in the fuel tank 6 is detected by the weight of the fuel tank 6 instead of being detected by the liquid level device (oil level detection device 150). Calculation conversion may be performed. Further, the amount of the fuel pump 6 sucking up the fuel in the fuel tank 6 varies depending on the combustion amount, and furthermore, the fuel temperature in the fuel tank 6 has the same effect. By correcting, if the fuel corresponding to the normal combustion amount (discharge amount) is sucked up and sent to the carburetor 12, optimum combustion becomes possible. Therefore, stable combustion can be obtained even if the oil feeding path 300 for sending the fuel directly from the fuel tank 6 to the carburetor 12 is configured.

  As described above, in the conventional petroleum fan heater, in order to stabilize during combustion, the output of the pump is corrected using various correction coefficients so that the combustion amount is stabilized. However, when the amount of residual oil in the fuel tank is reduced at the time of ignition, the oil level is lowered, and the oil level of the suction pipe in the fuel tank is similarly lowered, so that the space in the suction pipe becomes longer. Therefore, the time from the start of operation of the electromagnetic pump after the completion of preheating at the time of ignition until the oil actually reaches the electromagnetic pump is longer than when the amount of residual oil in the oil supply tank is large. In particular, when the amount of residual oil is extremely small, the supply of oil from the electromagnetic pump to the carburetor is not in time, and ignition failure may occur. In this case, it is sufficient to take a long time from detection of completion of preheating to actual ignition (gas is ejected from the nozzle of the carburetor, solenoid valve is turned on, and the nozzle is opened). When there is a large amount of oil, the oil immediately reaches the electromagnetic pump, so that the oil is sent to the carburetor more than necessary, the internal pressure of the carburetor rises excessively, and ignition may be unstable.

As a second countermeasure when the amount of residual oil in the fuel tank is small at the time of ignition, forced holding time at ignition (forcibly holding combustion even if the flame current value does not reach a predetermined value after the nozzle opens) It is considered to lengthen the time). According to this measure, even if the amount of residual oil in the oil tank decreases and the time from when the electromagnetic pump starts operation until the oil actually reaches the electromagnetic pump increases, the oil to the vaporizer Even if the supply of the gas is delayed, by keeping the ignition device in the forced holding time, ignition is performed when the vaporized gas is ejected from the burner, and then the flame current value increases to a predetermined value. Thus, combustion can be maintained. However, when there is a malfunction in the ignition device or the like, the vaporized gas continues to be emitted for a long time.
JP 2001-343116 A

  Therefore, in the liquid fuel combustion apparatus, it has been recognized that there is a problem that the ignition state becomes unstable according to the amount of residual oil in the fuel tank, and the electromagnetic pump and the carburetor are There is a problem to be solved in that the operation control at the time of ignition is changed in accordance with the amount of remaining fuel to stabilize the operation at the time of ignition according to the actual amount of remaining fuel.

  The object of the present invention is to change the operation control during ignition of the electromagnetic pump and the carburetor according to the amount of remaining fuel, thereby stabilizing the operation at the time of ignition according to the actual amount of remaining fuel. In the conventional liquid fuel combustion device, the oil supply from the electromagnetic pump to the vaporizer is not in time, and ignition failure occurs, or the oil is sent to the vaporizer more than necessary, and the internal pressure of the vaporizer rises excessively and ignition occurs. To provide a liquid fuel combustion apparatus that avoids instability.

  In order to solve the above-described problems, a liquid fuel combustion apparatus according to the present invention includes a cartridge-type fuel tank that is detachably accommodated in a tank housing chamber in a main body, an electromagnetic pump that directly pumps fuel in the fuel tank, A vaporizer for vaporizing the fuel supplied from the electromagnetic pump and ejecting it as fuel gas; a burner for igniting and burning the fuel gas with an ignition device; temperature detecting means for detecting the temperature of the vaporizer; A liquid fuel combustion apparatus comprising: a control device that controls the operation of the electromagnetic pump and the vaporizer in response to a signal from a temperature detection means; and a residual oil amount detection means that detects a residual oil amount in the fuel tank. The control device is configured to correct the operation control at the time of ignition of the electromagnetic pump and the carburetor according to the residual oil amount of the oil tank.

  According to the liquid fuel combustion apparatus of the present invention, normally, an electromagnetic pump directly pumps the fuel in the fuel tank from the cartridge-type fuel tank that is detachably accommodated in the tank housing chamber in the main body. In the carburetor, the supplied fuel is vaporized into fuel gas. The fuel gas ejected from the vaporizer is ignited by the ignition device in the burner and burned. The temperature of the vaporizer is detected by the temperature detection means, and the control device receives the signal from the temperature detection means and controls the operation of the electromagnetic pump and the vaporizer. Further, the residual oil amount detection means detects the residual oil amount in the oil supply tank as, for example, the oil level height. At the time of ignition, the control device corrects and controls the operation control of the electromagnetic pump and the carburetor according to the detected residual oil amount (oil level height). The operation elements of the electromagnetic pump and the vaporizer include the operation timing, operation intensity, and length of forced holding time of the electromagnetic pump, and these are corrected and controlled from the normal operation state at the time of ignition.

  As an example of the operation of the electromagnetic pump or the carburetor, the control device determines the time from when the electromagnetic pump is activated until the vaporizer is activated to start fuel gas injection according to the amount of remaining oil in the fuel tank. Corrections can be made. When there is a large amount of residual oil in the oil tank, that is, when the oil level is high, when the electromagnetic pump starts operating, it starts from the start of the operation until it starts sucking oil and supplying it to the carburetor. Since the time is short, the control device shortens the time from when the electromagnetic pump is activated to when the vaporizer is activated and the fuel gas is ejected. Conversely, if the amount of residual oil in the oil tank is small, it takes time from the start of operation of the electromagnetic pump until the oil is actually sucked up, and it takes time until the oil is supplied to the vaporizer. The time from the start of operation of the pump until the carburetor is activated and the fuel gas is ejected is lengthened. Examples of the operation of the carburetor include ON / OFF of a solenoid valve for heating and vaporizing the fuel, and opening and closing of a nozzle for injecting fuel gas into the combustion chamber. Thereby, at the time of actual ignition (when the nozzle is opened), an almost constant amount of oil can be supplied to the carburetor regardless of the amount of oil remaining in the oil tank, and the ignition state is stabilized.

  Further, in this liquid fuel combustion apparatus, the control means can correct the set temperature used as the preheat completion determination of the carburetor based on the signal from the temperature detection means in accordance with the amount of remaining oil in the fuel tank. In other words, in order to give the electromagnetic pump the timing to start its operation, it is necessary to determine that the carburetor has completed preheating, but the set temperature that the carburetor should reach varies depending on the amount of oil remaining in the oil tank. By doing so, the change in the vaporizer temperature during actual ignition (nozzle opening) can be reduced. The control device can perform the change of the preheating completion temperature by correcting the temperature so that it becomes such a set temperature as compared with a normal case. In other words, when the amount of residual oil in the fuel tank is large, the time from the start of pump operation until the nozzle is opened is shortened. The temperature rises to a sufficient temperature. In addition, when the amount of oil remaining in the oil tank is small, the time from the start of pump operation to the opening of the nozzle becomes longer.Therefore, by setting the preheating completion temperature low, the carburetor at the time of actual ignition in a long time The temperature rises to the set temperature. As a result, the temperature of the carburetor at the time of actual ignition becomes substantially constant regardless of the amount of remaining oil, and the amount of oil supplied to the carburetor becomes almost constant, so that the ignition state is stabilized.

  In this liquid fuel combustion apparatus, in addition to this, the control means corrects the forced holding time as a period during which forced combustion is to be held based on the amount of remaining oil in the fuel tank when determining ignition after ignition. be able to. That is, the forced combustion holding time after ignition may be changed according to the amount of residual oil in the oil tank. When there is a large amount of residual oil, the supply of oil to the vaporizer is fast, so control is performed to ignite almost instantaneously after the nozzle is opened. As a result, the flame current value also reaches a predetermined value faster. For this reason, the forced combustion holding time can be shortened. By doing in this way, even when an ignition mistake is caused due to a malfunction of the ignition device or the like, the vaporized gas ejection time can be shortened. When the amount of residual oil is small, it takes time until the oil is supplied to the carburetor, and there may be a situation where the ejection of vaporized gas is delayed at the time of actual ignition (when the nozzle is open). Therefore, even if ignition is delayed and it takes time for the frame current value to reach a predetermined value, it is not determined that the ignition has failed.

  In this liquid fuel combustion apparatus, the control means can perform the correction for the operation control at the time of ignition of the electromagnetic pump and the carburetor by a correction coefficient determined by the residual oil amount of the fuel tank. The correction coefficient can be determined with reference to Table 1 above.

  As described above, according to the liquid fuel combustion apparatus of the present invention, during ignition, the operation state of the electromagnetic pump and the carburetor is normally set according to the amount of oil remaining in the fuel tank (oil level height). By changing it from that of time, a more stable ignition state can be obtained.

Since the liquid fuel combustion apparatus of the present invention has the same basic configuration as that of the prior art, description thereof and description of normal operation will be omitted.
The liquid fuel combustion apparatus according to the present invention is characterized by its combustion control. Hereinafter, combustion control will be described with reference to the drawings in each embodiment. FIG. 1 is a flowchart showing a procedure for controlling the operation at the time of ignition in the first embodiment of the liquid fuel combustion apparatus of the present invention. In FIG. 1, when an operation switch (not shown) of the oil fan heater is turned on (step 1; abbreviated as “S1”, the same applies hereinafter), a carburetor heater attached to the carburetor 12 (not shown). Thus, the vaporizer 12 is heated. At this time, the temperature of the vaporizer 12 is detected by a vaporizer thermistor (not shown). It is determined whether or not the preheat completion determination temperature has been reached depending on whether or not the detected temperature reaches a predetermined temperature (S2). If the preheat completion judgment temperature has not been reached, the temperature rise is awaited. When the preheating completion determination temperature is reached, it is determined whether or not the oil level in the oil supply tank 6 is higher than a set value (S3).

  When the detected temperature reaches a predetermined temperature, the electromagnetic pump 13 is driven and starts operation according to the detected value of the oil level (S4, S14). It is determined whether or not a predetermined time T (T1 or T2) has been driven by the electromagnetic pump 13 (S5, S15). The solenoid valve 84 is driven, and the needle 83 connected to the solenoid valve 84 opens the nozzle 82 of the vaporizer 12 (S6, S16). Vaporized gas is ejected from the opened nozzle 82 and ignited by the ignition device on the burner 14 (S7, S17). The forced holding time of about several tens of seconds after the nozzle 82 is opened and the vaporized gas is ejected is forcibly held even if the flame current value does not reach the predetermined value. It is determined whether or not (S8, S18). If the forced holding time has not elapsed, wait for the elapse. It is determined whether or not the flame current value detected by the flame sensor 114 when the forced holding time has elapsed is equal to or greater than a predetermined value (S9, S19). When it is determined that the flame current value has reached the predetermined value, combustion is continued (S10, S20), and when it is determined that the flame current value has not reached the predetermined value, ignition has failed. Determination is made and combustion is stopped (S11, S21).

  The time T from when the electromagnetic pump 13 is started to when the solenoid valve 84 is driven and the ejection of vaporized gas is started is changed according to the oil level detected by the oil level detector 150. . That is, in the determination at S3, when it is determined that the oil level of the oil tank 6 is higher than the set value, the time T from the drive of the pump 13 to the start of the solenoid valve 84 is set to T1, and the oil tank 6 Is determined to be lower than the set value, the time T from the drive of the pump 13 to the start of driving of the solenoid valve 84 is set to T2. Here, the setting of the time T is T1 <T2. As a result, at the time of actual ignition (when the nozzle is opened), an almost constant amount of oil can be supplied to the vaporizer regardless of the amount of remaining oil in the oil supply tank 6, and the ignition state is stabilized.

  Next, the operation of the apparatus at the time of ignition of the second embodiment of the liquid fuel combustion apparatus of the present invention will be described. FIG. 2 is a flowchart showing a procedure for controlling the operation at the time of ignition in the second embodiment of the liquid fuel combustion apparatus of the present invention. In FIG. 2, when the operation switch (not shown) of the oil fan heater is turned on (S31), the oil level of the oil tank is detected by the oil level detector 150 (S32). Next, the vaporizer 12 is heated by a vaporizer heater (not shown) attached to the vaporizer 12. At this time, the temperature of the carburetor 12 is detected by a carburetor thermistor (not shown), and it is determined whether or not the preheat completion determination temperature has been reached based on whether or not the detected temperature reaches a predetermined temperature (S33, S43). ). If each preheating completion judgment temperature has not been reached, the temperature rise is awaited. When the preheating completion determination temperature is reached, driving of the electromagnetic pump 13 is started (S34, S44). Here, the preheating completion temperature TH, which is the temperature at which driving of the electromagnetic pump 13 is started, is changed according to the oil level height of the oil supply tank. That is, when the oil level is higher than the set value, the preheating completion temperature in S33 is TH1, and when the oil level is lower than the set value, the preheating completion temperature in S43 is TH2. Here, TH1> TH2 is set. That is, when the oil level is high, the preheating completion temperature is increased.

  After the electromagnetic pump 13 starts driving (S34, S44), the solenoid valve 84 is driven (S36, S46), and the nozzle 82 of the vaporizer 12 is opened. The operation after the opening of the nozzle 82 is the same as that of the first embodiment, and the overlapping description of the vaporized gas ejecting, igniting, starting combustion, etc. (S37 to S41, S47 to S51) is omitted. . The time T from the start of driving of the electromagnetic pump 13 to the driving of the solenoid valve 84 is changed depending on the oil level. That is, for time T, T1 <T2, and the time when the oil level is higher than a predetermined value is set as T1 (S35), and the time when the oil level is lower than the predetermined value is set as T2 (S45). As a result, the temperature of the carburetor 12 at the time of actual ignition is substantially constant regardless of the amount of residual oil, and the amount of oil supplied to the carburetor 12 is also substantially constant, so that the ignition state is stabilized.

  Subsequently, the operation of the apparatus at the time of ignition of the third embodiment of the liquid fuel combustion apparatus of the present invention will be described. FIG. 3 is a flowchart showing a procedure for controlling the operation at the time of ignition in the third embodiment of the liquid fuel combustion apparatus of the present invention. In FIG. 3, when the operation switch (not shown) of the oil fan heater is turned on (S61), the vaporizer 12 is heated by the vaporizer heater (not shown) attached to the vaporizer 12. At this time, the temperature of the vaporizer 12 is detected by a vaporizer thermistor (not shown). It is determined whether or not the preheat completion determination temperature has been reached based on whether or not the detected temperature reaches a predetermined temperature (S62). If the preheat completion judgment temperature has not been reached, the temperature rise is awaited. When the preheating completion determination temperature is reached, it is determined whether or not the oil level in the oil supply tank 6 is higher than a set value (S63).

  When the detected temperature reaches a predetermined temperature, the electromagnetic pump 13 is driven according to the detected value of the oil level to start operation (S64, S74), and the electromagnetic pump 13 has been driven for a predetermined time T. (S65, S75), and if the time has not elapsed, after waiting for the elapse of time T, the solenoid valve 84 attached to the vaporizer 12 is driven after the elapse of time T, and the needle 83 connected to the solenoid valve 84 Opens the nozzle 82 of the vaporizer 12 (S66, S76). The vaporized gas is ejected from the opened nozzle 82 and ignited by the ignition device on the burner 14 (S67, S77). Even if the flame current value does not reach the predetermined value within the forced holding time of about several tens of seconds after the nozzle 82 is opened and the vaporized gas is ejected, the combustion is forcibly held and the fire is not extinguished. It is determined whether or not it has been done (S68, S78). If the forced holding time has not elapsed, wait for the elapse.

  It is determined whether or not the flame current value detected by the flame sensor 114 when the forced holding time has elapsed is equal to or greater than a predetermined value (S69, S79). When it is determined that the flame current value has reached the predetermined value, combustion is continued (S70, S80), and when it is determined that the flame current value has not reached the predetermined value, ignition has failed. Determination is made and combustion is stopped (S71, S81). In S <b> 68 and S <b> 78, the forced holding time T until it is determined whether the flame current value is equal to or greater than a predetermined value is changed according to the oil level of the fuel tank 6. The forced holding time when the oil level of the oil tank 6 is higher than a predetermined value is T1, and the forced holding time when the oil level is lower than the predetermined value is T2, where T1 <T2 is set. To do. As a result, when the amount of residual oil is large (when the oil level is high), the supply of oil to the vaporizer 12 is fast, so that ignition occurs almost instantaneously after the nozzle 82 is opened. As a result, the flame current ground value reaches a predetermined value faster. For this reason, the forced combustion holding time T1 can be shortened. By doing in this way, even when an ignition mistake is caused due to a malfunction of the ignition device or the like, the vaporized gas ejection time can be shortened. When the amount of residual oil is small (when the oil level is low), it takes time until the oil is supplied to the vaporizer 12, and the ejection of vaporized gas is delayed during actual ignition (when the nozzle 82 is opened). Although a situation is conceivable, since the forced holding time T2 is set to be long, even if ignition is delayed and it takes time until the flame current value reaches a predetermined value, it is not determined that the ignition has failed.

  Subsequently, the operation of the apparatus at the time of ignition of the fourth embodiment of the liquid fuel combustion apparatus of the present invention will be described. FIG. 4 is a flowchart showing a procedure for controlling the operation at the time of ignition in the fourth embodiment of the liquid fuel combustion apparatus of the present invention. In FIG. 4, when the operation switch (not shown) of the oil fan heater is turned on (S91), the vaporizer 12 is heated by the vaporizer heater (not shown) attached to the vaporizer 12. At this time, the temperature of the vaporizer 12 is detected by a vaporizer thermistor (not shown). It is determined whether or not the preheat completion determination temperature has been reached based on whether or not the detected temperature reaches a predetermined temperature (S92). If the preheat completion judgment temperature has not been reached, the temperature rise is awaited. When the preheating completion determination temperature is reached, it is determined whether or not the oil level in the oil supply tank 6 is higher than a set value (S93).

  When the detected temperature reaches a predetermined temperature, the electromagnetic pump 13 is driven according to the detected value of the oil level to start operation (S94, S104). It is determined whether or not the drive of the electromagnetic pump 13 has elapsed for a predetermined time T (S95, S105). After a lapse of time T, the solenoid valve 84 attached to the vaporizer 12 is driven, and the needle 83 connected to the solenoid valve 84 opens the nozzle 82 of the vaporizer 12 (S96, S106). The vaporized gas is ejected from the opened nozzle 82 and ignited by the ignition device on the burner 14 (S97, S107). Although the nozzle 82 is opened and the vaporized gas is ejected, the combustion is forcibly held and the fire is not extinguished even if the flame current value detected by the flame sensor 114 does not reach a predetermined value within the forced holding time of about several tens of seconds. Then, it is determined whether or not the forced holding time has elapsed (S98, S108). If the forced holding time has not elapsed, wait for the elapse.

  It is determined whether or not the flame current value detected by the flame sensor 114 when the forced holding time has elapsed is equal to or greater than a predetermined value (S99, S109). When it is determined that the flame current value has reached the predetermined value, combustion is continued (S100, S110), and when it is determined that the flame current value has not reached the predetermined value, ignition has failed. Determination is made and combustion is stopped (S101, S111). At this time, the operation strength from the start of operation of the electromagnetic pump 13 until the solenoid valve 84 is driven and the nozzle 82 is opened may be changed according to the oil level of the oil supply tank 6. Here, when the operating strength when the oil level of the fuel tank 6 is equal to or greater than a predetermined value is A and the operating strength when the oil level is equal to or lower than the predetermined value is B, A <B is set. When the amount of residual oil in the oil supply tank 6 is large (when the oil level is high), it takes less time to supply the oil to the vaporizer 12, so that the operating strength of the electromagnetic pump 13 can be reduced. When the amount of residual oil in the oil supply tank 6 is small (when the oil level is low), the operating strength of the electromagnetic pump 13 may be increased. Thereby, the amount of oil supplied to the carburetor 12 at the time of actual ignition becomes substantially constant, and the ignition state can be stabilized.

[Other Embodiments]
The embodiments of the present invention are not limited to the first to fourth embodiments described above, and many modifications and changes can be made within the scope of the present invention.

The flowchart of operation | movement of the apparatus at the time of the ignition in 1st Example of the liquid fuel combustion apparatus by this invention. The flowchart of operation | movement of the apparatus at the time of ignition in 2nd Example of the liquid fuel combustion apparatus by this invention. The flowchart of operation | movement of the apparatus at the time of ignition in 3rd Example of the liquid fuel combustion apparatus by this invention. The flowchart of operation | movement of the apparatus at the time of ignition in 4th Example of the liquid fuel combustion apparatus by this invention. 1 is a partial front sectional view of an oil fan heater according to a first embodiment of a liquid fuel combustion apparatus according to the present invention. The block diagram of the liquid fuel combustion apparatus shown in FIG. FIG. 6 is a schematic view of a fuel tank used in the liquid fuel combustion apparatus shown in FIG. 5. The perspective view of the connection part of the oil tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the oil feeding joint applied to the oil tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the return oil joint applied to the oil tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the oiling cap part applied to the oiling tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the oil-feeding side connection means applied to the oil supply tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the oil feeding joint receiving part applied to the oil tank shown in FIG. The longitudinal cross-sectional view which shows the structure of the return oil side connection means applied to the oil tank shown in FIG. Sectional drawing which shows the structure of the vaporizer and burner of the oil fan heater shown in FIG. FIG. 6 is a control block diagram for an electromagnetic pump in the oil fan heater shown in FIG. 5. FIG. 6 is a partially omitted front sectional view showing an example of the oil fan heater shown in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Petroleum fan heater main body 1a Tank accommodating chamber 1b Functional component accommodating chamber 1c Combustion part chamber 1d Mounting base 2 Front plate 3 Top plate 4 Operation part 5 Outlet 6 Oil supply tank 7 Lid 8 Mounting base 9 Oil supply joint 9a Joint main body 9b Small diameter protruding cylinder 9c Central valve hole 9d Valve seat 10 Oil supply joint receiver 10a Receiver body 11 Tank guide 12 Vaporizer 13 Electromagnetic pump 14 Burner 15 Combustion chamber 16 Partition plate 17 Burner box 20 Air valve 20a Valve element 20b Electromagnetic coil 20c Spring 21 Return oil joint 21a Joint body 21b Small-diameter protruding cylinder 21c Central valve hole 21d Valve seat 22 Return oil joint receiver 22a Receiver body 23 Handle 24 Oil supply cap with pressure valve 25 Oil gauge 26 Oil supply port 27 Suction pipe 28 Valve mechanism 29 of oil supply joint 9 Return oil joint 21 valve Structure 30 Connecting pipe 30a Return passage 30b Flange 31 Valve body 32 Valve body 33 Valve body 33 Sealing O-ring 35 Spring 36 Spring 38 Lid nut 40 Lid nut 41 O-ring 42 O-ring 43 Connecting pipe 43a Suction passage 43b Flange 44 Suction Port 45 Filter 46 Insertion hole 47 Hole 48 Insertion hole 49 Hole 50 Rubber packing 51 Rubber packing 53 Cap body 54 Pressure valve mechanism 55 Rubber packing 56 Release hole 57 Pressure release hole 58 Valve body 59 Spring 60 Valve mechanism 60a Valve chamber 60b Valve Hole 61 Concave receiving part 62 Valve body 63 Spring 64 O-ring 65 Valve receiver 66 Passage 67 Sealing surface 68 Valve receiver accommodating part 69 Passage 70 Passage 71 Valve mechanism 71a Lower valve chamber 71b Valve hole 72 Concave receiving part 73 Valve body 74 Spring 75 O phosphorus for sealing 76 Valve receiver 77 Grid-shaped passage 78 Seal surface 79 Valve receiver housing portion 80 Passage 81 Vaporization element 82 Nozzle 83 Needle 84 Solenoid valve 85 Fuel inlet 86 Return circuit 87 Heat recovery portion 88 Stainless steel pipe 89 Copper pipe 90 Electromagnetic coil 91 Movable piece 92 Adsorbing piece 93 Pressing spring 93
94 Mixing tube 95 Flame port 114 Flame sensor 150 Oil level detection device 151 Control device 151a Switch determination unit 151b Oil level determination unit 151c Room temperature determination unit 151d Oil temperature determination unit 151e Correction unit 152 Oil temperature detection sensor 153 Room temperature sensor 154 Calculation unit 155 Control unit 156 Drive circuit 157 Indoor temperature setting switch 203, 204, 207 Piping 300 Oil supply path 301 Return oil path

Claims (6)

A cartridge-type fuel tank that is detachably housed in a tank housing chamber in the main body, an electromagnetic pump that directly pumps fuel in the fuel tank, and the fuel supplied from the electromagnetic pump is vaporized and ejected as fuel gas A carburetor that burns by igniting the fuel gas with an igniter, temperature detection means for detecting the temperature of the carburetor, and the electromagnetic pump and the carburetor receiving a signal from the temperature detection means In a liquid fuel combustion apparatus comprising: a control device that controls the operation of: and a residual oil amount detection means that detects a residual oil amount of the fuel tank.
The said control apparatus correct | amends according to the said residual oil amount of the said fuel tank about the operation control at the time of the ignition of the said electromagnetic pump and the said carburetor, The liquid fuel combustion apparatus characterized by the above-mentioned.   The control device corrects the time from when the electromagnetic pump is activated to when the vaporizer is activated and the fuel gas is started to be injected according to the amount of residual oil in the fuel tank. The liquid fuel combustion apparatus according to claim 1.   The said control means correct | amends according to the said amount of residual oil of the said fuel tank about the preset temperature used as the preheating completion determination of the said vaporizer based on the signal from the said temperature detection means. The liquid fuel combustion apparatus as described.   The said control means correct | amends based on the said amount of residual oil of the said oil supply tank about the driving | operation intensity | strength after that of the said electromagnetic pump, when the said preheating completion of the said vaporizer is determined. Liquid fuel combustion equipment.   The said control means correct | amends the forced holding time as a period which should hold | maintain forced combustion based on the said amount of residual oil of the said fuel tank at the time of the ignition determination after ignition. The liquid fuel combustion apparatus described in 1.   The said control means performs the said correction | amendment about the operation control at the time of the ignition of the said electromagnetic pump and the said carburetor by the correction coefficient defined by the said residual oil amount of the said oil tank. The liquid fuel combustion apparatus of any one of Claims.

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