Combustion machine

Abstract

To provide a combustor which can use a power accumulation type power supply device which is easy in portability.SOLUTION: A combustor comprises: a burner 2 having a vaporizer 9; a vaporization heater 8; an electromagnetic pump 11; a discharge electrode 22; a combustion sensor 23; a vaporization temperature sensor 21; and a control part 3. When a temperature of the vaporizer 9 is equal to or lower than an on-temperature, the vaporization heater 8 is turned on. When the temperature of the vaporizer 9 reaches an off-temperature or higher which is higher than the on-temperature, the vaporization heater 8 is turned off, and a combustion amount is changed when the temperature of the vaporizer 9 reaches the off-temperature or higher after an ignition operation. Electricity-carrying to the vaporization heart 8 is thereby stopped when the temperature reaches the off-temperature or higher, and even if the combustion amount is increased, the temperature of the vaporizer 9 is not lowered to the on-temperature, the second-time electricity-carrying to the vaporization heater 8 is thus prevented, and power consumption caused by the electricity-carrying to the vaporization heater 8 is suppressed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a combustion device that burns fuel oil. [Background technology]

[0002] Conventionally, this type of device would receive an operation start command from an operation switch, monitor the temperature detected by the vaporization temperature sensor, and heat the vaporizer by energizing the vaporization heater until the temperature of the vaporizer reaches a temperature suitable for combustion. Once the vaporizer temperature has risen to a temperature suitable for combustion, the electromagnetic pump and combustion fan would begin to operate, the ignition device would ignite the mixed gas to start combustion, a flame would be detected by a combustion sensor with a flame rod, and the power to the vaporization heater would be stopped. Additionally, depending on the deviation between the room temperature detected by a room temperature sensor located near the convection fan on the back of the appliance body and the set room temperature set by the room temperature setting means, the electromagnetic pump and combustion fan would be controlled to vary the combustion power so that the room temperature reached the room temperature set by the room temperature setting means (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-469664 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with this conventional system, when trying to operate the combustion unit using an easily portable storage-type power supply unit as a power source, the combustion unit cannot be operated if the output of the power supply unit is smaller than the heater output of the combustion unit's evaporative heater.Therefore, in order to enable the combustion unit to be operated with a power supply unit with a small output, it was necessary to reduce the heater output of the combustion unit's evaporative heater.

[0005] As a result, it takes longer to raise the vaporizer temperature to a temperature suitable for combustion than with conventional combustion machines that use commercial power.Furthermore, as the amount of combustion increases at the same time intervals as before after ignition, the increasing amount of fuel takes away the heat of vaporization, making it difficult for the vaporizer temperature to rise.As a result, the vaporizer heater remains powered even after ignition, consuming the electricity stored in the power supply. [Means for solving the problem]

[0007] request request 1 The present invention relates to a combustion unit having a vaporizer for vaporizing fuel oil, a vaporizer heating means for heating the vaporizer, and a Note The apparatus includes a fuel oil supply means for supplying fuel oil to a vaporizer, an ignition means for igniting the fuel vaporized in the vaporizer, a flame detection means for detecting a flame in the combustion section, a vaporizer temperature detection means for detecting the temperature of the vaporizer, an operation switch for instructing the start and stop of combustion in the combustion section, a timing means for measuring time, and a control section for controlling combustion in the combustion section, wherein the control section turns on the vaporizer heating means when the temperature of the vaporizer is equal to or lower than an on temperature, and turns on the vaporizer heating means when the temperature of the vaporizer is equal to or higher than an off temperature that is higher than the on temperature. In an oil combustion machine that turns off the heating means, the control unit is equipped with a short-term control that changes the combustion amount after ignition at short intervals and a long-term control that changes the combustion amount after ignition at long intervals, and after the ignition means performs an ignition operation and the flame detection means detects a flame, when the temperature of the vaporizer becomes higher than the off temperature, the combustion amount is controlled by the long-term control, and thereafter, when the combustion amount becomes the maximum combustion amount and the maximum combustion amount state continues for a predetermined time, the combustion amount is controlled by the short-term control.

[0008] Also, claims 2 The present invention relates to a combustion unit having a vaporizer for vaporizing fuel oil, a vaporizer heating means for heating the vaporizer, and a NoteThe apparatus includes a fuel oil supply means for supplying fuel oil to a vaporizer, an ignition means for igniting the fuel vaporized in the vaporizer, a flame detection means for detecting a flame in the combustion section, a vaporizer temperature detection means for detecting the temperature of the vaporizer, an operation switch for instructing the start and stop of combustion in the combustion section, a timing means for measuring time, and a control section for controlling combustion in the combustion section, and the control section turns on the vaporizer heating means when the temperature of the vaporizer is equal to or lower than an on temperature, and turns off the vaporizer heating means when the temperature of the vaporizer is equal to or higher than an off temperature which is higher than the on temperature. In an oil combustion machine that turns off the vaporizer heating means, the control unit is equipped with short-term control that changes the combustion amount after ignition at short intervals and long-term control that changes the combustion amount after ignition at long-term intervals, and after the ignition means performs ignition operation and the flame detection means detects a flame, when the temperature of the vaporizer becomes higher than the off temperature, the combustion amount is controlled by the long-term control, and thereafter when the temperature of the vaporizer becomes a switching temperature higher than the off temperature, the combustion amount is controlled by the short-term control. [Effects of the Invention]

[0010] request request 1 According to the above, after the ignition means performs ignition and the flame detection means detects a flame, when the temperature of the vaporizer reaches or exceeds the off temperature, the combustion amount is controlled using long-term control, and when the combustion amount thereafter reaches the maximum combustion amount and remains at that maximum combustion amount for a predetermined time, the combustion amount is controlled using short-term control. Therefore, when the combustion amount is increased after ignition, the temperature of the vaporizer drops temporarily, but the combustion heat is recovered and the temperature of the vaporizer is raised before the combustion amount increases further, and even if the combustion amount increases further, the temperature of the vaporizer does not drop to the on temperature, preventing the heater from being energized again due to the drop to the on temperature, and reducing power consumption due to the heater being energized again.

[0011] Furthermore, once the combustion amount reaches its maximum after ignition and continues for a predetermined period of time, the vaporizer temperature becomes sufficiently high, and even if the combustion amount is controlled using short-term control, the vaporizer temperature does not drop to the on-temperature. This prevents the heater from being energized again, and allows the combustion amount to be quickly changed in response to changes in room temperature or set temperature.

[0012] Also, claims 2 According to the above, after the ignition means performs ignition and the flame detection means detects a flame, when the temperature of the vaporizer reaches the off temperature or higher, the combustion amount is controlled using long-term control, and when the temperature of the vaporizer then reaches a switching temperature higher than the off temperature, the combustion amount is controlled using short-term control.Therefore, when the combustion amount is increased after ignition, the temperature of the vaporizer drops once, but the combustion heat is recovered and the temperature of the vaporizer is raised before the combustion amount further increases, and even if the combustion amount further increases, the temperature of the vaporizing section does not drop to the on temperature, preventing the heater from being energized again due to the drop to the on temperature, and reducing power consumption due to the heater being energized again.

[0013] Furthermore, once the vaporizer temperature reaches a switching temperature higher than the off temperature after ignition, the vaporizer temperature becomes sufficiently high, and even if the combustion amount is controlled using short-term control, the vaporizer temperature does not drop to the on temperature. This prevents the heater from being energized again, and allows the combustion amount to be quickly changed in response to changes in room temperature or set temperature. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a cross-sectional view of a combustion unit according to an embodiment of the present invention. [Figure 2] The same configuration diagram. [Figure 3] FIG. [Figure 4] FIG.

[0015] Next, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes the main body of the combustion unit, which is provided inside the main body 1 and is equipped with a burner 2 which is the combustion part that performs the combustion, a control unit 3 which is mainly composed of a microcomputer that controls the operation of this combustion unit, a convection fan 4 which is a blower that is provided at the opening on the back of the main body 1 and discharges the combustion gas from the burner 2 into the room, a hot air outlet 5 on the front of the main body 1, and an operation unit 6 on the upper front side of the main body 1, and heating is performed by blowing the combustion gas from the burner 2 into the room using the convection fan 4 from the hot air outlet 5.

[0016] The burner 2 is configured with a vaporizer 9 having a vaporization heater 8, which is a vaporizer heating means, located below a burner head 7 with multiple flame holes. Liquid fuel is supplied from an oil pan 10 into the vaporizer 9 heated by the vaporization heater 8 through an oil supply nozzle 12, driven by a positive displacement electromagnetic pump 11, which is a fuel supply means. The vaporized gas produced by this liquid fuel and a mixture of combustion air supplied through an air duct 14 from a combustion fan 13, which is a combustion blower, are combusted in the flame holes of the burner head 7. During combustion, heat is recovered from the flame by an annular heat recovery ring 15 located at the upper end of the vaporizer 9 so as to face the multiple flame holes, thereby reducing the current flowing through the vaporization heater 8. This results in a wide turndown ratio and quiet vaporization combustion.

[0017] The operation unit 6 is provided with an operation switch 16 for issuing commands to start / stop operation, a room temperature setting means 19 consisting of a room temperature increase switch 17 and a room temperature decrease switch 18 for setting the desired room temperature, various operation switches such as a timer switch and a preheat standby switch, and a display unit 20 for displaying the time and the set room temperature.

[0018] Reference numeral 21 denotes a vaporization temperature sensor, which is a vaporizer temperature detection means for detecting the temperature of the vaporizer 9 heated by the vaporization heater 8. When the temperature detected by this vaporization temperature sensor 21 reaches a predetermined upper limit temperature, the control unit 3 turns off the vaporization heater 8, and when the temperature reaches a predetermined lower limit temperature, the control unit 3 turns on the vaporization heater 8 to maintain the temperature of the vaporizer 9 within a temperature range in which the liquid fuel can be vaporized well.

[0019] In addition, in response to an operation start command from the operation switch 16, the control unit 3 monitors the temperature detected by the vaporization temperature sensor 21 and heats the vaporizer 9 using the vaporization heater 8 to a temperature at which the liquid fuel can be vaporized.Once the temperature of the vaporizer 9 has been raised to a temperature suitable for combustion, it starts driving the electromagnetic pump 11 and combustion fan 13, ignites the mixed gas using the discharge electrode 22, which is an ignition means, to start combustion, detects the flame using the combustion sensor 23, which consists of a flame rod, which is a flame detection means, and controls the electromagnetic pump 11 and combustion fan 13 to vary the combustion power depending on the deviation between the room temperature detected by the room temperature sensor 24, which is located near the convection fan 4 on the back of the device main body 1, and the set room temperature set by the room temperature setting means 19, thereby controlling the room temperature to become the room temperature set by the room temperature setting means 19.

[0020] The control unit 3 also has a timer means 25 which is a timing means, and when the timer means 25 receives a timing start signal from the control unit 3, it starts timing and outputs the time being counted to the control unit 3, and when it receives a timing stop signal from the control unit 3, it stops timing and resets.

[0021] Furthermore, when the control unit 3 receives an operation stop command from the operation switch 16, it appropriately controls the convection fan 4, evaporation heater 8, electromagnetic pump 11, and combustion fan 13 to extinguish fire in accordance with the count of the timer means 25, thereby realizing comfortable fire extinguishing without odor or smoke, and also starts timing when the combustion sensor 23 detects incomplete combustion, and stops timing after a predetermined time has elapsed.

[0022] Reference numeral 26 denotes a hollow cylindrical metal flame tube, which is provided to enclose the upper part of the burner 2 and stabilizes combustion by preventing the air from the convection fan 4 from directly hitting the flame-forming part at the top of the burner 2, and also prevents the flame from being fanned by the air from the convection fan 4 and blowing out from the hot air outlet 5.

[0023] Next, the operation of this embodiment will be described with reference to the flow chart of FIG. First, the control unit 3 determines whether the operation switch 16 of the operation unit 6 has been turned on (S1). When it is determined that the operation switch 16 has been turned ON, it is then determined whether the vaporizer temperature of the vaporizer 9 is below the ignition temperature at which ignition is possible (S2), and if the vaporizer temperature is below the ignition temperature, power is started to be supplied to the vaporization heater 8 of the burner 2 (S3). In this embodiment, the ignition temperature is set to 200°C.

[0024] ?Then, when the vaporizer temperature reaches or exceeds the ignition temperature (S4), the control unit 3 drives the combustion fan 13 (S5) and drives the electromagnetic pump 11 (S5) to supply fuel oil and combustion air to the vaporizer 9 to generate a mixed gas, and ignites the mixed gas with the discharge electrode 22 (S7) to start combustion.

[0025] ?Then, if the detection value by the combustion sensor 23 using the flame rod is equal to or greater than the ignition judgment value (S8), the control unit 3 determines that a flame has been detected and sets long-term control, which sets the interval for changing the combustion amount to a long time (S9). In this embodiment, the long time is set to 15 seconds.

[0026] Next, the convection fan 4 is driven (S10). Next, control unit 3 determines whether the vaporizer temperature is equal to or higher than the off temperature at which power supply to vaporization heater 8 is stopped (S11), and if the vaporizer temperature is equal to or higher than the off temperature at which power supply to vaporization heater 8 is stopped, it determines that the temperature of vaporizer 9 is sufficiently high and stops power supply to vaporization heater 8 (S12). In this embodiment, the off temperature is set to 260° C., which is higher than the on temperature, which will be described later. Then, when the vaporizer temperature reaches or exceeds the off temperature of 260°C, power to the vaporization heater 8 is stopped. After that, when the vaporizer temperature reaches or exceeds the on temperature of 230°C, power to the vaporization heater 8 is started again, and when the vaporizer temperature reaches or exceeds the off temperature of 260°C, power to the vaporization heater 8 is stopped, and this control is repeated thereafter.

[0027] Then, the control unit 3 outputs a time count start signal to the timer means 25, and the timer means 25 starts counting time (S13). Then, when the time counted by timer means 25 reaches the long time set in the long-time control (15 seconds in this embodiment) (S14), control unit 3 determines that heat recovery by combustion has been sufficient even though power supply to vaporization heater 8 has stopped, outputs a time count stop signal to timer means 25 to stop and reset timer means 25 (S15), and increases the combustion amount by one step (S16).

[0028] Next, the control unit 3 determines whether the increased combustion amount is the maximum combustion amount (S17), and if it is not the maximum combustion amount (S13), it outputs a time count start signal to the timer means 25, and the timer means 25 starts counting (S18). By increasing the combustion amount to the maximum combustion amount, the area around the burner 2, the burner head 7 of the burner 2, and the heat recovery ring 15 can be sufficiently heated, and the temperature even reaches the inside of the vaporizer 9, resulting in sufficient heat storage.

[0029] When the combustion amount is increased one step in (S16), the amount of fuel supplied to the vaporizer 9 increases, and the increased amount of fuel takes away the heat of vaporization, causing the vaporizer temperature to drop. Therefore, if the increased combustion amount is not the maximum combustion amount, the control unit 3 returns to (S13) and continues combustion at the increased combustion amount for the long period set in the long-term control.

[0030] As a result, the combustion amount increases by one step, and more heat of vaporization of the fuel is taken away than before the combustion amount was increased by one step, but the heat recovery through combustion also increases, causing the vaporizer temperature to gradually decrease, and when the long period set in the long-term control has elapsed, the increased heat recovery is sufficiently returned to the vaporizer 9, and the decrease in the vaporizer temperature stops and it does not decrease to the on temperature at which power begins to be supplied to the vaporization heater 8. In this embodiment, the on-temperature is set to 230° C., which is higher than the ignition temperature.

[0031] Then, after the timer means 25 starts timing in (S18), when the timer means 25 reaches the preset control switching time period (20 seconds in this embodiment) (S19), the control unit 3 determines that even if the combustion amount is increased in a short time, the vaporizer temperature will be high enough not to fall below the on temperature, and that sufficient heat recovery is possible, and sets the interval for changing the combustion amount to short-time control, which is the short interval for changing the combustion amount in normal temperature control (S20). In this embodiment, the short time is set to 4 seconds.

[0032] Then, the control unit 3 outputs a time count stop signal to the timer means 25 to stop and reset the timer means 25 (S21), and starts normal temperature adjustment control (S22).

[0033] As described above, during normal operation when the temperature of the vaporizer 9 is sufficiently high, when the combustion amount is increased, the interval at which the combustion amount is changed is set to a short time using short-term control, thereby quickly increasing the combustion amount, whereas when the combustion amount is increased after ignition, the interval at which the combustion amount is changed is set to a long time using long-term control, thereby sufficiently recovering heat through combustion and stopping the temperature of the vaporizer 9 from dropping before increasing the combustion amount.This prevents the vaporizer heater 8 from remaining powered or being powered on frequently, even if a low-output vaporizer heater 8 is used, and prevents the vaporizer heater 8 from being powered on after ignition or from consuming the electricity stored in the power supply, even if a portable storage-type power supply device is used as the power source.

[0034] Next, the operation of another embodiment will be described with reference to the flow chart of FIG. Since steps (S1) to (S16) are the same as those in the above-described embodiment, the explanation will be omitted. Therefore, after increasing the combustion amount by one step in (S16), the control unit 3 determines whether the vaporizer temperature is equal to or higher than the switching temperature (S23). In this embodiment, the switching temperature is set to 280° C., which is higher than the off temperature.

[0035] When the vaporizer temperature is above the switching temperature, the vaporizer temperature will be so high that it will not fall below the on-temperature even if the combustion amount is increased in a short time, and the control unit 3 determines that the state is such that sufficient heat recovery is possible, and sets short-term control (S24) to change the combustion amount at a short interval, which is the interval for change in normal temperature control, and starts normal temperature control (S25).

[0036] Also, when the vaporizer temperature is below the switching temperature in (S23), the control unit 3 determines whether the combustion amount is the maximum combustion amount (S26), and if it is not the maximum combustion amount, returns to (S13), and if it is the maximum combustion amount, proceeds to (S24), sets short-time control in which the interval for changing the combustion amount is set to a short time, which is the interval for changing the combustion amount in normal temperature control, and starts normal temperature control (S25).

[0037] As described above, if the vaporizer temperature reaches or exceeds the switching temperature higher than the off temperature before the combustion is increased to the maximum combustion amount after ignition, the interval for changing the combustion amount at that point is set to short-time control, which is the short time interval used for changing the combustion amount in normal temperature control.Therefore, normal temperature control can be started sooner than when long-time control is used to change the combustion amount until the combustion amount reaches the maximum combustion amount.

[0038] Furthermore, when the vaporizer temperature does not reach a switching temperature higher than the off temperature after ignition, the interval at which the combustion amount is changed is controlled for a long period of time until the combustion amount reaches the maximum combustion amount, thereby sufficiently recovering heat through combustion and increasing the temperature of the vaporizer 9 before increasing the combustion amount.This prevents the vaporizer heater 8 from remaining powered or being powered on frequently even if a low-output vaporizer heater 8 is used, and even if a portable storage-type power supply device is used as the power source, it prevents the vaporizer heater 8 from being powered on after ignition and the power stored in the power supply device from being consumed.

[0039] 2 Burner (combustion part) 3. Control Unit 8 Vaporization heater (vaporizer heating means) 9. Vaporizer 11 Electromagnetic pump (fuel supply means) 21 Vaporization temperature sensor (vaporizer temperature detection means) 22 Discharge electrode (ignition means) 23 Combustion sensor (flame detection means)

Claims

1. The present invention is provided with a combustion section having a vaporizer for vaporizing fuel oil, vaporizer heating means for heating the vaporizer, fuel oil supply means for supplying fuel oil to the vaporizer, ignition means for igniting the fuel oil vaporized by the vaporizer, flame detection means for detecting a flame in the combustion section, vaporizer temperature detection means for detecting the temperature of the vaporizer, an operation switch for instructing the start and stop of combustion in the combustion section, timing means for measuring time, and a control section for controlling combustion in the combustion section, wherein the control section turns on the vaporizer heating means when the temperature of the vaporizer is equal to or lower than an on temperature, and turns on the vaporizer heating means when the temperature of the vaporizer is higher than the on temperature. In an oil combustion machine that turns off the vaporizer heating means when the temperature reaches a high off-temperature or higher, the control unit is equipped with short-term control that changes the combustion amount after ignition at short intervals and long-term control that changes the combustion amount after ignition at long intervals, and is characterized in that after the ignition means performs ignition operation and the flame detection means detects a flame, when the temperature of the vaporizer reaches the off-temperature or higher, the combustion amount is controlled by the long-term control, and thereafter, when the combustion amount becomes the maximum combustion amount and that maximum combustion amount state continues for a predetermined time, the combustion machine controls the combustion amount by the short-term control.

2. The present invention is provided with a combustion unit having a vaporizer for vaporizing fuel oil, vaporizer heating means for heating the vaporizer, fuel oil supply means for supplying fuel oil to the vaporizer, ignition means for igniting the fuel oil vaporized by the vaporizer, flame detection means for detecting a flame in the combustion unit, vaporizer temperature detection means for detecting the temperature of the vaporizer, an operation switch for instructing the start and stop of combustion in the combustion unit, timing means for measuring time, and a control unit for controlling combustion in the combustion unit, wherein the control unit turns on the vaporizer heating means when the temperature of the vaporizer is equal to or lower than an on temperature, and turns on the vaporizer heating means when the temperature of the vaporizer is equal to or lower than the on temperature. In an oil combustion machine that turns off the vaporizer heating means when the temperature reaches or exceeds an off temperature higher than the off temperature, the control unit is equipped with a short-term control that changes the combustion amount after ignition at short intervals and a long-term control that changes the combustion amount after ignition at long intervals, and is characterized in that after the ignition means performs an ignition operation and the flame detection means detects a flame, when the temperature of the vaporizer reaches or exceeds the off temperature, the combustion amount is controlled by the long-term control, and thereafter when the temperature of the vaporizer reaches a switching temperature higher than the off temperature, the combustion amount is controlled by the short-term control.

Images