JP2018021704A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating device capable of preventing generation of white smoke at ignition time even in a vaporizer whose heat capacity is small.SOLUTION: In a heating device, heat capacity of a vaporizer 24 is small. The heating device includes: storage means 45 for storing the number of times in which a preheating switch 33 is operated and a vaporization heater 25 is brought into an ON state and then it comes into an OFF state; determination means 46 for determining whether or not the number of times n stored by the storage means 45 reaches a predetermined number of times N; and vaporization heater ON/OFF temperature setting means 47 which sets the ON temperature and OFF temperature of the vaporization heater 25 during a preheating operation, and when the determination means 46 determines that the number of times n stored by the storage means 45 reaches the predetermined number of times N, changes the ON/OFF temperature of the vaporization heater 25. Thus, the temperature of a burner head 13 can be increased sufficiently in the preheating operation, and even when an ignition operation is performed in a state where the temperature of the vaporizer 24 is low, ignition can be performed without generating white smoke.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a heating apparatus such as a vaporization type oil heater.

  Conventionally, in this type, when the operation switch is turned on, the combustion control unit starts energizing the heater of the carburetor via the carburetor temperature control unit, and the carburetor temperature reaches a predetermined temperature at which fuel oil can be vaporized. When a signal indicating that it has been reached is input from the vaporization temperature detection unit, the combustion control unit drives the burner fan and the electromagnetic pump to enter an ignition operation and starts combustion.

  Furthermore, a preheating switch is provided separately from the operation switch, and if this preheating switch is turned on, the vaporizer is energized regardless of whether the operation is in progress or not, and the vaporizer is kept at a heat retention temperature lower than the ignition temperature. There was a thing that started the ignition operation in a short time when the operation switch was turned on. (For example, refer to Patent Document 1.)

JP-A-6-347028

By the way, in this conventional one, the vaporizer is made of thick aluminum, so that the heat capacity of the vaporizer is large, and the temperature of the vaporizer rises from a low temperature state when the operation is stopped to a predetermined temperature at which fuel oil can be vaporized. It took time.
Therefore, when the thickness of the vaporizer is reduced and the heat capacity of the vaporizer is reduced, the time until the temperature of the vaporizer rises from a low temperature state when the operation is stopped to a predetermined temperature at which the fuel can be vaporized is shortened. It has become possible to shorten the time from the start of operation to the start of operation.

  However, this makes it easier for the carburetor to warm and cool than before, and when the preheat switch is turned on, the energization of the vaporizer heater is turned off when the temperature of the carburetor reaches the energization OFF temperature in the preheating operation. Since the temperature of the chamber drops to the energization ON temperature, energization ON and energization OFF in the preheating operation are frequently performed, and the life of the relay that performs the ON / OFF control of energization of the vaporizing heater is shortened and breaks down. There was a problem.

  Therefore, in order to increase the temperature range between the energization ON temperature and the energization OFF temperature in order to reduce the number of times the energization heater is energized, the preheating temperature approaches the predetermined temperature at which the fuel can evaporate when the energization OFF temperature is increased. In this case, useless power is consumed, but the energization OFF temperature is not changed and the energization ON temperature is lowered and the temperature range between the energization ON temperature and the energization OFF temperature is increased.

  However, when the preheat switch is turned on from the low temperature state when the operation is stopped, once the temperature of the vaporizer reaches the energization OFF temperature, the energization is not turned on unless the temperature becomes lower than the conventional energization ON temperature. When the temperature of the burner head provided does not rise easily and the burner head temperature does not rise sufficiently, when the operation switch is turned on and the vaporizer temperature reaches the predetermined temperature and the ignition operation starts, the burner head temperature is not high. Therefore, there was a problem that white smoke was generated.

  In order to solve the above-mentioned problems, according to claim 1 of the present invention, a device main body, a vaporizer in the device main body where fuel oil is vaporized, and installed in the vaporizer and energized to heat the vaporizer. A preheating operation for preheating the vaporizer at a predetermined preheating temperature by controlling ON / OFF of energization to the vaporization heater; A preheating switch to perform, an operation switch for instructing the start of a heating operation for burning in the combustion section, and when the operation switch is operated, the vaporization heater is energized to heat the vaporizer and reach a predetermined ignition temperature. In a heating apparatus including a control unit that ignites the combustion unit and starts a heating operation, the vaporizer has a small heat capacity, and the preheat switch is operated in the control unit so that the vaporization heater is in an ON state. Storage means for storing the number of times that the storage device is turned off, determination means for determining whether the number of times n stored in the storage means has reached a predetermined number N, and ON of the vaporizing heater during preheating operation A vaporizing heater ON / OFF temperature setting unit that changes the ON / OFF temperature of the vaporizing heater when the determination unit determines that the number of times n stored in the storage unit has reached a predetermined number of times N. It is provided.

  According to a second aspect of the present invention, the vaporization heater ON / OFF temperature setting means changes the ON temperature of the vaporization heater to a low temperature when the determination means determines that the number n stored in the storage means has reached a predetermined number N. To do.

  According to the first aspect of the present invention, the heat capacity of the vaporizer is reduced, and the controller stores the number of times the preheat switch is operated and the vaporization heater is turned on and then turned off. Determining means for determining whether or not the number of times n stored in the storage means has reached a predetermined number N, and the ON temperature and the OFF temperature of the vaporizing heater during the preheating operation. Vaporization heater ON / OFF temperature setting means for changing the ON / OFF temperature of the vaporization heater when it is determined that the number of times n stored in the storage means has reached the predetermined number of times N is provided. When the temperature of the vaporizer rises from the low temperature state at the time of shutdown to the specified temperature at which the fuel can be vaporized, the time from when the operation switch is turned on until the start of operation is reduced. In which it can be shortened.

  Furthermore, in the preheating operation, the temperature of the burner head can be made sufficiently high by setting the ON temperature and OFF temperature of energization to the vaporizing heater to the same temperature as before until the number of ON / OFF times reaches a predetermined number. Even if the ignition operation is performed in a state where the temperature of the carburetor is lower than that in the prior art, the temperature of the burner head is sufficiently high so that ignition can be performed without generating white smoke.

  According to the second aspect of the present invention, when the determination means determines that the number n stored in the storage means has reached the predetermined number N, the vaporization heater ON / OFF temperature setting means lowers the ON temperature of the vaporization heater. The ON and OFF temperatures for energizing the vaporization heater are changed. After the ON / OFF count reaches the predetermined number, the ON temperature is lowered, and after the ON / OFF count reaches the predetermined number, the ON temperature is decreased. Even if the ignition operation is performed in a state where the temperature of the vaporizer is lower than that of the conventional one, the temperature of the burner head is sufficiently high, so that ignition can be performed without generating white smoke.

  Furthermore, the ON and OFF temperatures of energization to the vaporizing heater are set to a predetermined value at which the preheating temperature can be vaporized by increasing the OFF temperature by lowering the ON temperature after the ON / OFF count has reached a predetermined number. The temperature range between the ON and OFF temperatures can be increased while preventing unnecessary power from being consumed without approaching the temperature, and the thickness of the vaporizer can be reduced to reduce the heat capacity of the vaporizer. Even if the temperature of the vaporizer rises and falls quickly during preheating operation, the temperature range is large, so the number of times of energization to the vaporization heater can be reduced, and the energization of the vaporization heater is controlled accordingly. It is possible to prevent a failure due to a shortened life of the relay.

The front perspective view of the heating device which shows one Embodiment of this invention. Sectional drawing of the embodiment. The figure explaining the combustion system of the embodiment. The figure explaining the operation part of the embodiment. The control block diagram of the embodiment. The flowchart figure explaining the preheating operation | movement of the embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
1 is an instrument main body, 2 is an upper surface plate constituting the upper surface of the instrument main body 1, 3 is an operation unit which is provided on the upper surface plate 2 and is operated by various switches, 4 is a liquid crystal screen showing the contents of operations performed by the operation unit 3, etc. The liquid crystal panel 5 is displayed on the front side of the instrument body 1 and is provided with a louver 6 for guiding the warm air. The power plug 7 supplies electricity to the instrument body 1 by being plugged into a household outlet. It is.

  8 is a convection fan attached to the hot air inlet 9 on the back via a fan guard 10, 11 is a blower box communicating the hot air intake 9 and the hot air blower 6, and 12 is in the blower box 11. A burner as a combustion part provided by projecting the burner head 13, 14 is a combustion cylinder surrounding the burner head 13 to form a combustion space, and 15 is arranged in the blower box 11 directly above the combustion cylinder 14. This is a heat shield.

  16 is an oil supply tank for supplying fuel oil such as kerosene, 17 is a fixed tank for storing a predetermined amount of fuel oil supplied from the oil supply tank 16, 18 is an oil amount sensor for measuring the amount of fuel oil in the fixed tank 17 by a float, and 19 is fixed. An electromagnetic pump 22 that pumps fuel in the tank 17 to the burner 12 via the oil feed pipe 20 and the oil feed nozzle 21, and a combustion fan that blows combustion air through the blow pipe 23.

  Reference numeral 24 denotes a vaporizer that vaporizes the fuel oil, 25 denotes a vaporization heater that heats the vaporizer 24 to a predetermined ignition temperature at which the fuel oil can vaporize when energized, 26 denotes a vaporization temperature sensor that detects the temperature of the vaporizer 24, and 27 A flame hole network provided on the outer periphery of the burner head 13, 28 is a heat recovery ring that recovers combustion heat to the vaporizer 24, 29 is an igniter that sparks and discharges vaporized gas, and 30 monitors the state of the flame. In the frame rod, the vaporizer 24 has a reduced thickness and a reduced heat capacity.

  The operation unit 3 includes an operation switch 31 for instructing start and stop of the heating operation by combustion in the burner 12, an extension switch 32 for continuously executing the heating operation even after a predetermined heating operation time has elapsed, and a vaporization heater. 25, a preheating switch 33 that preheats the carburetor 24 at a predetermined preheating temperature and starts a preheating operation that enables a heating operation within a few seconds after the operation switch 31 is operated, and a heating operation at the current time or a predetermined time. Operation other than a stop instruction for the operation switch 31 to prevent mischief of the child, a time setting switch 34 that enables setting of the timer operation to start the operation, a numerical adjustment switch 35 that adjusts the set temperature and current time in the heating operation A child lock switch 36 that disables the timer and a timer operation switch that can set the start time of the heating operation in two ways by the time setting switch 34. , And an eco switch 38 that performs eco operation with a reduced power consumption by forcibly reducing to 20 ° C. when the set temperature is 21 ° C. or more while suppressing the maximum heating power by 40%. To change the control of heating operation.

  Further, an operation lamp 39 that is turned on when the operation switch 31 is operated to start the heating operation, an extension lamp 40 that blinks 15 minutes before the automatic fire extinguishing, and a preheat that lights up when the preheating switch 33 is operated. The operation unit 3 includes a lamp 41, a timer operation lamp 42 that turns on the timer operation switch 37 operated in two ways, and an eco lamp 43 that lights up when the eco switch 38 is operated and the eco operation is started. The presence or absence of various switch operations can be easily confirmed visually.

  Reference numeral 44 denotes a control unit configured by a microcomputer that controls the instrument body 1. The control unit 44 stores the number of times the preheat switch 33 is operated and the vaporization heater 25 is turned on and then turned off. Means 45, determination means 46 for determining whether or not the number of times n stored in the storage means 45 has reached a predetermined number N, and the ON and OFF temperatures of the vaporizing heater 25 during the preheating operation. When the determination means 46 determines that the number n stored in the storage means 45 has reached the predetermined number N, the vaporization heater ON / OFF temperature setting means 47 is provided to change the ON / OFF temperature of the vaporization heater 25.

Next, FIG. 6 shows the control when the preheat switch 33 is operated before the operation switch 31 for starting the heating operation is operated to preheat the carburetor 24 at a predetermined preheat temperature and advance the ignition time. This will be described with reference to a flowchart.
First, the control unit 44 determines whether or not the preheating switch 33 is turned on (S1). If the preheating switch 33 is turned on, the number of times n stored in the storage means 45 has reached the predetermined number N. It is determined whether or not. (S2)

  In this embodiment, the predetermined number N is set to 8 times. This is because when the number of ON / OFF times of the preheating operation becomes 8 times or more, the temperature of the burner head 13 becomes sufficiently high, and when the operation switch is turned on and the ignition operation is started, it is possible to ignite without generating white smoke. .

  When the number n stored in the storage means 45 does not reach the predetermined number N in (S2), the vaporizer heater ON / OFF temperature setting means 47 sets the ON temperature of the vaporizer heater 25 during the preheating operation to 241 ° C. and the OFF temperature. The temperature is set to 247 ° C. (S3), and the number n stored in the storage means 45 is set to n + 1. (S4)

  Then, it is determined whether or not the temperature of the vaporizer 24 detected by the vaporization temperature sensor 26 is lower than the ON temperature 241 ° C. of the vaporization heater 25 (S5). In (S5), the temperature of the vaporizer 24 is turned on. When the temperature is lower than 241 ° C., the vaporization heater 25 is turned on (S6), and then it is determined whether or not the temperature of the vaporizer 24 is equal to or higher than the OFF temperature 247 ° C. of the vaporization heater 25 (S7). When the temperature of the vaporizer 25 is lower than 247 ° C., the vaporizer 25 is kept on. When the temperature of the vaporizer 24 is equal to or higher than the temperature 247 ° C. of the vaporizer 25, the vaporizer 25 is turned off. (S8)

  Then, after the vaporization heater 25 is turned off in (S8), it is determined whether or not the operation switch 31 is turned on (S9). If the operation switch 31 is not turned on, the process returns to (S2) and the operation switch 31 is turned on. If operated, ignition control is performed to start operation (S10), and the preheating switch 33 in the ON state is turned OFF. (S11)

  After (S11), it is determined whether or not the operation switch 31 is turned off (S12). If the operation switch 31 is not turned off, the operation is continued. If the operation switch 31 is turned off, the fire extinguishing control is performed. The operation is stopped (S13), the number n stored in the storage means 45 is set to 0 (S14), and the process returns to (S1).

  When the temperature of the vaporizer 24 is equal to or higher than the ON temperature 241 ° C. of the vaporization heater 25 in (S5), it is determined whether or not the operation switch 31 is turned on (S15), and the operation switch 31 must be turned on. If the operation switch 31 is turned ON, the process returns to (S10).

  When the number of times n stored in the storage means 45 has reached the predetermined number N in (S2), the vaporization heater ON / OFF temperature setting means 47 sets the ON temperature of the vaporization heater 25 during the preheating operation to 200.degree. Is set to 247 ° C. (S16), and the number of times n stored in the storage means 45 is set to n + 1 (S17). Next, the temperature of the vaporizer 24 detected by the vaporization temperature sensor 26 is set to ON of the vaporization heater 25. It is determined whether or not the temperature is lower than 200 ° C. (S18). If the temperature of the vaporizer 24 is lower than 200 ° C. of the vaporization heater 25 in (S18), the process returns to (S6), and the temperature of the vaporizer 24 is changed to the vaporization heater. When the ON temperature of 25 is 200 ° C. or higher, the process returns to (S15).

  As described above, since the thickness of the carburetor 24 is reduced to reduce the heat capacity of the carburetor 24, it takes time until the temperature of the carburetor 24 rises from a low temperature state when the operation is stopped to a predetermined temperature at which fuel oil can be vaporized. This shortens the time from when the operation switch 31 is turned on until the operation is started.

  Furthermore, in the preheating operation, the temperature of the burner head 13 can be made sufficiently high by setting the ON temperature and OFF temperature of energization to the vaporizing heater 25 to the same temperature as before until the number of ON / OFF times reaches a predetermined number. As a result, even if the ignition operation is performed in a state where the temperature of the vaporizer 24 is lower than that in the prior art, the temperature of the burner head 13 is sufficiently high so that ignition can be performed without generating white smoke.

  In addition, the ON temperature and the OFF temperature of energization to the vaporizing heater 25 are lowered after the ON / OFF frequency reaches the predetermined number, so the ON temperature is lowered after the ON / OFF frequency reaches the predetermined number. Even if the ignition operation is performed in a state where the temperature of the carburetor 24 is lower than that in the prior art, the temperature of the burner head 13 is sufficiently high, so that ignition can be performed without generating white smoke.

  Further, the ON temperature and the OFF temperature of energization to the vaporizing heater 25 are reduced after the number of ON / OFF times reaches a predetermined number of times, so that the preheating temperature can be vaporized by increasing the OFF temperature. The temperature range between the ON temperature and the OFF temperature can be increased while approaching a predetermined temperature and preventing wasteful power consumption without being operated, and the heat capacity of the vaporizer 24 can be reduced by reducing the thickness of the vaporizer 24. Even if the temperature of the vaporizer 24 rises and falls quickly during preheating operation, the temperature range is large, so that the number of times of energization of the vaporization heater 25 can be reduced. It is possible to prevent the relay performing the ON / OFF control of energization from being shortened and failing.

DESCRIPTION OF SYMBOLS 1 Instrument main body 12 Combustion part 24 Vaporizer 25 Vaporization heater 31 Operation switch 33 Preheating switch 44 Control part 45 Memory | storage means 46 Determination means 47 Vaporization heater ONOFF temperature setting means

Claims (2)

  An appliance body, a vaporizer in the appliance body that vaporizes fuel, a vaporizer heater that is installed in the vaporizer and that is energized to heat the vaporizer, and ignites the fuel vaporized by the vaporizer A combustion section that burns, a preheating switch that controls ON / OFF of energization to the vaporization heater and preheats the vaporizer at a predetermined preheating temperature, and starts a heating operation that burns in the combustion section An operation switch for instructing, and a control unit for energizing the vaporization heater when the operation switch is operated to heat the vaporizer and igniting the combustion unit when the predetermined ignition temperature is reached to start a heating operation. In the heating device, the vaporizer has a small heat capacity, and the control unit stores a number of times the preheat switch is operated and the vaporization heater is turned on after being turned on. Determining means for determining whether or not the number of times n stored in the storage means has reached a predetermined number N, and the ON temperature and the OFF temperature of the vaporizing heater during the preheating operation. A heating apparatus comprising vaporizing heater ON / OFF temperature setting means for changing the ON / OFF temperature of the vaporizing heater when it is determined that the number n stored in the storage means has reached a predetermined number N.   The vaporization heater ON / OFF temperature setting means changes the ON temperature of the vaporization heater to a low temperature when the determination means determines that the number n stored in the storage means has reached a predetermined number N. Item 2. The heating device according to Item 1.

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