JP6416579B2 - Liquid fuel combustion equipment - Google Patents

Description

  The present invention relates to a liquid fuel combustion apparatus such as a heater using liquid fuel.

  Conventionally, in this type, when the fuel tank for storing fuel is inserted into a predetermined position of the liquid fuel combustion apparatus, a signal indicating that the fuel in the fuel tank is full is automatically output to the control unit. In some cases, the remaining amount of fuel in the fuel tank is calculated by subtracting the amount of fuel consumed from the full state and the remaining amount of fuel is displayed on the display unit (for example, see Patent Document 1).

JP 2001-349532 A

  By the way, when filling the fuel tank, there may be a case where the fuel tank cannot be fully filled or a case where the full tank is not filled. For example, if the amount of fuel stored in a polytank is low and the fuel in the polytank is not filled up as a result of refueling in the refueling tank, or if the refueling tank is full, it will be heavy and difficult to transport Therefore, depending on the user, it may be assumed that the fuel tank is not fully filled.

  In this way, when the fuel tank is inserted into a predetermined position of the liquid fuel combustion device in a state where the fuel tank is not full, the control unit assumes that the fuel is filled in the fuel tank. , Subtract the amount of fuel consumed from the full state, and display the remaining amount of fuel in the fuel tank on the display, but in fact, the fuel tank is not full, so in that case, There is a problem that an accurate remaining amount display cannot be performed.

In order to solve the above-mentioned problems, according to a first aspect of the present invention, an oil supply tank that is detachable from an apparatus main body and stores liquid fuel therein, a burner, and an electromagnetic that supplies liquid fuel from the oil supply tank to the burner. In the liquid fuel combustion apparatus including a pump, setting means for setting that the remaining amount of fuel in the fuel tank is not full, a display unit, and a control unit for controlling operation, the control unit includes the setting If it is determined by the means that the remaining amount of fuel in the fuel tank is not full, the fuel consumption after the start of operation is calculated, and the fuel consumption is displayed on the display unit, If it is not set by the setting means that the remaining amount of fuel in the fuel tank is not full, the initial value is that the remaining amount of fuel in the fuel tank is full. Fuel after start Now by subtracting the consumption to calculate the remaining fuel amount of the current of the fuel supply tank, and shall indicate the fuel quantity on the display unit.

  According to the first aspect of the present invention, when the control unit determines that the initial value is set by the setting means, the fuel consumption in the current fuel tank is subtracted from the initial value by subtracting the fuel consumption after the start of operation. By calculating the remaining amount and displaying the remaining amount of fuel on the display unit, it is possible to accurately display the remaining amount, and when it is determined that the initial value has not been set by the setting means By calculating the fuel consumption after the start of operation and displaying the fuel consumption on the display unit, the user can display the displayed fuel consumption while the amount of fuel supplied to the fuel tank is unknown. The approximate amount of fuel remaining in the fuel tank can be estimated from the amount, and the necessity of refueling can be recognized.

  According to claim 2, when the control unit determines that the remaining fuel amount in the fuel tank is not full by the setting unit, the control unit calculates the fuel consumption after the start of operation, and By displaying the fuel consumption on the display unit, the amount of fuel supplied to the fuel tank is unknown, so the user can roughly estimate the fuel remaining in the fuel tank from the displayed fuel consumption. The necessity of refueling can be recognized, and if the setting means does not set that the remaining amount of fuel in the fuel tank is not full, the remaining fuel amount in the fuel tank The initial value is that the battery is full, the fuel consumption after the start of operation is subtracted from the initial value, the remaining amount of fuel in the current fuel tank is calculated, and the remaining fuel amount is displayed on the display It is possible to display the remaining amount accurately It is.

The perspective view of the liquid fuel combustion apparatus which shows one Embodiment of this invention. The principal part sectional drawing. The principal part block diagram. The block diagram of the control circuit. FIG.

Next, a liquid fuel combustion apparatus according to an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a fan heater main body as a liquid fuel combustion apparatus installed indoors. Inside the fan heater main body 1 is a burner 2 composed of a vaporizing burner for burning liquid fuel, and a microcomputer for controlling the operation of the fan heater main body 1. , A convection blower 4 at the rear opening of the fan heater main body 1, a hot air outlet 5 at the front of the fan heater main body 1, and an operation unit 6 at the upper front side of the fan heater main body 1. Heating is performed by blowing the combustion exhaust gas in the burner 2 from the hot air outlet 5 into the room by the convection blower 4.

  The burner 2 includes a vaporizing section 9 having a heater 8 below a burner head 7 having a plurality of flame holes. The burner 2 is a volume type from an oil pan 10 that stores a certain amount of kerosene as liquid fuel. When the electromagnetic pump 11 is driven, the liquid fuel is supplied to the vaporization section 9 heated by the heater 8 through the oil feed nozzle 12, and the vaporized gas vaporized from the liquid fuel and supplied from the combustion blower 13 through the blower passage 14. The combustion gas mixed with the combustion air is burned in the flame holes of the burner head 7, and during combustion, the flame is removed from the flame by an annular heat recovery ring 15 provided at the upper end of the vaporizing section 9 so as to face the plurality of flame holes. Heat recovery is performed to reduce energization of the heater 8, and quiet vaporization combustion is performed with a wide turndown ratio.

  The operation unit 6 includes an operation switch 16 for instructing start / stop of operation, a set room temperature changing means 19 configured by an ascending switch 17 and a descending switch 18 for setting a desired room temperature, and a fuel tank described later. 26 as a setting means for setting that the remaining amount of fuel in the initial value is full, various operation switches such as a timer switch and an extension switch, time, set room temperature, remaining fuel amount, etc. Is displayed.

  Reference numeral 22 denotes a vaporization temperature sensor for detecting the temperature of the vaporization unit 9 heated by the heater 8. The control unit 3 turns off the heater 8 when the temperature detected by the vaporization temperature sensor 22 reaches a predetermined upper limit temperature. When the predetermined lower limit temperature is reached, the heater 8 is turned on to keep the temperature of the vaporizing section 9 within a temperature range in which the liquid fuel can be vaporized well.

  Further, the control unit 3 monitors the temperature detected by the vaporization temperature sensor 22 in accordance with the operation start command of the operation switch 16 and heats the liquid fuel in the vaporization unit 9 to a temperature at which the liquid fuel can be vaporized by the heater 8. Is increased to a temperature suitable for combustion, the driving of the combustion blower 13 is started, the ignition device 23 is operated, and then the electromagnetic pump 11 is driven to supply fuel to the vaporizer 9 to ignite the mixed gas. The convection fan 4 is driven with the start of combustion, and according to the deviation between the detected room temperature of the room temperature sensor 24 provided in the vicinity of the convection fan 4 on the back of the main body 1 and the set room temperature set by the set room temperature changing means 19 Then, the electromagnetic pump 11 and the combustion blower 13 are controlled to vary the combustion heating power so that the room temperature set by the set room temperature changing means 19 is reached.

  Reference numeral 25 denotes an oil supply tank detection means. The oil supply tank detection means 25 is attached to the side surface of the oil supply tank 26 when a cartridge type oil supply tank 26 that is detachable from the fan heater main body 1 and stores liquid fuel therein is inserted into the fan heater main body 1. It closes by contact, and is composed of an open / close switch that opens when the fuel tank 26 is removed from the fan heater main body 1, and detects whether the fuel tank 26 is inserted into the fan heater main body 1. When the fuel tank detection means 25 detects that the fuel tank 26 has been removed from the fan heater main body 1, the controller 3 stops the operation. Reference numeral 27 denotes a float switch, which detects that the fuel in the oil pan 10 has become a predetermined amount or less.

Next, the operation will be described with reference to the flowchart of FIG.
First, the control unit 3 determines whether or not the operation switch 16 is turned on (S1). When the control unit 3 determines that the operation switch 16 is turned on, the control unit 3 starts the operation, and then determines the fan according to the detection value of the fuel tank detection means 25. It is determined whether or not the fuel tank 26 is inserted into the heater body 1 (S2). When it is determined that the fuel tank 26 is not inserted, the control unit 3 stops the operation (S3). If it is determined in the process of S2 that the fuel tank 26 is inserted, whether or not the full tank switch 20 is turned on, that is, whether the initial value (full amount) is set as the fuel remaining amount in the fuel tank 26 The process proceeds to processing for determining whether or not (S4).

  Then, the control unit 3 determines whether or not the full tank switch 20 is turned on in the process of S4, and if it is determined that the full tank switch 20 is turned on, the calculated fuel tank during operation of the fan heater body 1 is determined. 26 is displayed on the display unit 21 (S5). If it is determined in the process of S4 that the full tank switch 20 has not been turned on, the control unit 3 displays the calculated fuel consumption on the display unit 21 (S6).

  Here, the calculation method of the remaining amount of fuel in the fuel tank 26 performed in the process of S5 will be described. The control unit 3 flows out of the fuel tank 26 based on the drive frequency of the electromagnetic pump 11 after the operation is started. The current fuel consumption is calculated, and the current fuel supply is calculated by subtracting the calculated current fuel consumption from the full state of the fuel tank 26, that is, the remaining amount of fuel that is the capacity of the fuel tank 26. The remaining amount of fuel in the tank 26 is calculated. On the other hand, as for the fuel consumption calculation method performed in the process of S6, as described above, the current fuel consumption flowing out from the fuel tank 26 is calculated based on the drive frequency of the electromagnetic pump 11 after the operation is started. To do. Further, the current fuel consumption mentioned above means the cumulative fuel consumption flowing out from the fuel tank 26 calculated based on the driving frequency of the electromagnetic pump 11 after the start of operation, and the operation switch 16 is turned on. When the operation is stopped after being turned off, the accumulated fuel consumption from the start to the operation is stored in the control unit 3, and the operation switch 16 is turned on again without the fuel tank 26 being extracted and the operation is started. In this case, the control unit 3 adds the fuel consumption amount flowing out from the fuel tank 26 calculated based on the drive frequency of the electromagnetic pump 11 after the operation is resumed to the fuel consumption amount stored at the previous stop of operation. It is cumulative.

  The fuel remaining amount and fuel consumption in the current fuel tank 26 calculated by the control unit 3 are based on the state that the fuel tank 26 is extracted from the fan heater body 1 and the open / close switch as the fuel tank detection means 25 is opened. Or when the oil supply tank 26 is inserted into the fan heater body 1 and the open / close switch as the oil supply tank detection means 25 detects the closed state. Is reset at every timing when the user refuels the refueling tank 26.

  As described above, when the user fills the fuel tank 26 with a full amount of fuel and the full tank switch 20 is turned on, the control unit 3 controls the fuel in the fuel tank 26 set to the initial value (full amount). By subtracting the combustion consumption after the start of operation from the remaining amount, the current remaining fuel amount in the fuel tank 26 is calculated, and the remaining fuel amount is displayed on the display unit 21. The remaining amount can be displayed. Further, when the fuel is not fully refilled into the refueling tank 26 by the user and the full tank switch 20 is not turned on, the control unit 3 calculates the current fuel consumption after the start of operation after refueling. Since the fuel consumption amount is displayed on the display unit 21, the amount of fuel supplied to the fuel tank 26 is unknown, but the user can roughly approximate the fuel consumption amount in the fuel tank 26 from the displayed fuel consumption amount. The remaining amount of fuel can be estimated and the necessity of refueling can be recognized.

  In this embodiment, the full tank switch 20 is provided as setting means for setting that the fuel remaining amount in the fuel tank 26 is full as an initial value. However, instead of the full tank switch 20, the fuel tank is provided. 26 may be provided with a shortage switch as a setting means for setting that the remaining amount of fuel in the fuel tank 26 is not full. When the shortage switch is provided, the user does not fill the fuel tank 26 with full fuel, When the shortage switch is turned on and it is set that the remaining amount of fuel in the refueling tank 26 is not full, the control unit 3 calculates the current fuel consumption after the start of operation after refueling. Since the fuel consumption amount is displayed on the display unit 21, the amount of fuel supplied to the fuel tank 26 is unknown, and the user can roughly determine the fuel in the fuel tank 26 from the displayed fuel consumption amount. Remaining It is possible to recognize whether or not there is a need for refueling. The user fills the fuel tank 26 with a full amount of fuel, the shortage switch 20 is not turned on, and the remaining fuel amount in the fuel tank 26 remains. When it is not set that the fuel is not full, the control unit 3 sets the initial value that the remaining amount of fuel in the fuel tank 26 is full, and subtracts the combustion consumption after the start of operation from the initial value. Thus, the present remaining fuel amount in the fuel tank 26 is calculated and the remaining fuel amount is displayed on the display unit 21, so that an accurate remaining amount display can be performed.

DESCRIPTION OF SYMBOLS 1 Fan heater main body 2 Burner 3 Control part 11 Electromagnetic pump 20 Setting means 21 Display part 26 Oil supply tank

Claims (1)

  A fuel tank that is detachable from the apparatus main body and stores liquid fuel therein, a burner, an electromagnetic pump that supplies liquid fuel from the fuel tank to the burner, and a remaining amount of fuel in the fuel tank is not full. In the liquid fuel combustion apparatus provided with a setting means for setting the fuel consumption, a display part, and a control part for controlling the operation, the control part may check that the remaining fuel amount in the fuel tank is not full by the setting means. If it is determined that the fuel consumption has been set, the fuel consumption after the start of operation is calculated, and the fuel consumption is displayed on the display unit. The remaining fuel in the fuel tank is not full by the setting means. Is not set, the initial value is that the remaining amount of fuel in the fuel tank is full, and the current fuel tank is subtracted from the initial value by subtracting the fuel consumption after the start of operation. Fuel inside Calculating the amount of liquid fuel combustion apparatus, characterized in that the fuel remaining amount was set to be displayed on the display unit.

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