JP2020030011A - Hot air heating device - Google Patents

Abstract

To provide a hot air heating device that can be used safely by preventing combustion from being started in a state that blades do not operate appropriately.SOLUTION: A hot air heating device includes a plurality of movable blades 13 that can be rotated at an air outlet 9, and executes blade operation determination in which a blade drive motor 23 for driving the movable blades 13 is rotated to check if the movable blades 13 operate normally before starting combustion by a burner 3. Thereby, combustion is prevented from being started in a state that the movable blades 13 do not operate appropriately, and the hot air heating device can be used safely.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a hot-air heating device that generates warm air by combustion to heat a room.

  Conventionally, as a heating device of this type, for example, a burner that burns fuel in a main body is provided, and a combustion gas generated by the burner and room air taken into the main body are mixed to generate hot air, and this hot air is generated. 2. Description of the Related Art There has been known an apparatus that heats a room by blowing air from an air outlet provided on a front surface of a main body. In addition, a vertically rotatable blade is provided at the outlet, and the blade is rotated (swinged) up and down in accordance with the amount of hot air to be blown out, thereby making the temperature distribution in the room uniform. In addition, there is one in which a heating effect is enhanced (for example, Patent Document 1).

  In the above-described heating device, while the operation is stopped, the blades are closed and the air outlet is closed. When the start of operation is instructed by operating the operation switch, the combustion in the burner is started, the blower fan is rotated, and the blade drive motor is driven to rotate the blade closing the air outlet to blow the air. Open the exit. At this time, the rotation angle of the blade is controlled so that the angle increases as the amount of combustion in the burner increases, and the blade approaches a substantially horizontal state.

JP 2017-44361 A

  In a heating device having such movable blades, if the movement of the blades is restricted due to an obstacle on the front of the main body, or if the motor driving the blades fails, the blades may not operate properly. There is. If the blades do not operate properly and the blades remain closed after combustion starts, or if the angle of the blades is smaller than the set angle, the blowing of warm air is obstructed and the body Or the floor surface is heated, thereby causing a problem of impairing safety.

  An object of the present invention is to provide a hot-air heating device that can be used safely by preventing combustion from starting in a state where blades do not operate properly.

The present invention provides a burner that burns gaseous fuel,
An outlet that blows out hot air,
A plurality of rotatable blades provided at the outlet,
A blade drive motor for rotating the blade,
Blade operation detecting means for detecting the operation of the blade,
And a control unit for controlling a combustion operation.The control unit performs a blade operation determination to rotate the blade drive motor and check whether the blade operates normally before starting the combustion. Device.

  With the configuration described above, combustion is prevented from being started in a state where the blades do not operate correctly, so that a hot air heating device with excellent safety can be obtained.

It is an internal lineblock diagram of a warm air heating device in this embodiment. It is a sectional lineblock diagram of a warm air heating device in this embodiment. It is sectional drawing of a vaporizer. It is an expanded sectional view of an outlet. (A) shows a state where the blade is closed, and (B) shows a state where the blade is opened. It is a perspective view of the mechanism which drives a blade | wing of the warm air heating apparatus in this embodiment. It is a front view of the same mechanism. It is a block diagram showing composition of a warm air heating device in this embodiment. It is a flowchart which shows an example of the blade operation | movement determination in this embodiment. It is a flowchart which shows another example of the blade operation | movement determination in this embodiment.

  Preferred embodiments of the present invention will be briefly described with reference to the operation of the present invention.

  The present invention is a hot air heating device including a plurality of blades that rotate by driving a motor at an outlet that blows out hot air, wherein the blade drive motor is rotated before starting combustion by a burner. A blade operation determination for confirming whether the blade operates normally is executed. Thus, it is possible to prevent combustion from starting in a state where the blades do not operate correctly, and to use the heating device safely.

  The heating device includes a vaporizer for vaporizing the fuel and a heater for heating the vaporizer, and performs the above-described blade operation determination a plurality of times. In the case of a heating system that has a structure that vaporizes fuel, it takes several tens of seconds to several minutes to preheat the vaporizer from when the operation is instructed until combustion is actually started by the burner. And Therefore, by performing the blade operation determination a plurality of times during this time, it is reliably detected that the blade has become inoperable before the start of combustion, and combustion is started in a state in which the blade does not operate properly. Can be prevented beforehand.

  The above-described blade operation determination includes a first blade operation determination performed before or during the preheating of the vaporizer and a second blade operation determination performed after the completion of the preheating of the vaporizer. By executing the first blade operation determination and the second blade operation determination, it is possible to more reliably detect that the blade has not correctly operated.

  When the first blade operation determination is performed and it is confirmed that the blade operates normally, the blade operation determination is not performed until the second blade operation determination is performed. This allows the blades to operate normally even if the blades temporarily change their position during the preheating of the vaporizer, such as when the blades touch their hands, if they return to their normal positions before the start of combustion. Since it is determined that the error has occurred, unnecessary error determination can be suppressed.

  When the first blade operation determination is performed and it is confirmed that the blades operate normally, the blade fixing operation is performed, and the second blade operation determination is performed during the execution of the blade fixing operation. Thereby, the time required for the second blade operation determination is shortened, so that abnormality of the blade operation can be quickly detected.

  The drive mechanism for rotating the blade by rotation of the motor includes a spring member that applies a restoring force to return the blade to its original position when a force is applied to the blade from outside. Therefore, even if the blade is closed by touching the hand during execution of the above-mentioned blade fixing operation, the hand separates before the second blade operation determination is executed, and an external force acts. When it disappears, the blade can automatically return to its original position by the restoring force. Thus, in the second blade operation determination, it is detected that the blade is operating normally, and thus unnecessary error determination can be suppressed more reliably.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an internal configuration diagram of the hot air heating device, and FIG. 2 is a cross-sectional configuration diagram of the hot air heating device. In the present embodiment, a fan heater that performs heating by burning fuel will be described as an example of a hot-air heating device.

  In the main body 1, a vaporizer 2 that heats a liquid fuel such as kerosene to produce a vaporized gas, a burner 3 that burns the vaporized gas generated by the vaporizer 2 to generate heat, and is provided above the burner 3 Combustion chamber 4, an ignition heater 5 for igniting burner 3, an oil pan 6 for storing fuel supplied from a fuel tank (not shown), and an electromagnetic pump mounted on oil pan 6 and pumping fuel to vaporizer 2. A pump 7 is provided.

  A blower 8 that takes in room air into the main body 1 is attached to the back of the main body 1. Further, on the front of the main body 1, an operation unit 16 provided with a number of switches for instructing the operation of the heating device, and an outlet 9 for blowing out hot air are attached. Are provided.

  FIG. 3 is a sectional configuration diagram of the vaporizer. The vaporizer 2 includes a vaporizer 40 that heats and vaporizes the liquid fuel, and a nozzle unit 41 that communicates with the vaporizer 40 and ejects the vaporized gas heated and vaporized by the vaporizer 40 from an outlet 43 at the tip. . The nozzle portion 41 has a cylindrical body 42 in which a cylindrical portion 421 and a small diameter portion 422 are integrally formed, a nozzle pipe 44 having a jet port 43 at a tip, and a solenoid coil 45 attached to the outer periphery of the cylindrical body 42. are doing. Further, the vaporizing section 40 includes a heater 46, communicates with the nozzle pipe 44 through a communication port 47, and is connected to the electromagnetic pump 7 through a liquid sending pipe 48.

  Inside the cylinder 42 of the nozzle portion 41, a movable piece 49 that slides by energization of the solenoid coil 45, a fixed piece 50 fixed to the rear end of the cylinder 42, and a portion between the movable piece 49 and the fixed piece 50 And a spring 51 interposed therebetween. The fixing piece 50 is formed with a relief section 52 which is a small space, and a relief pipe 53 for returning the vaporized gas remaining in the vaporizing section 40 and the nozzle pipe 44 to the oil receiving tray 6 through the relief section 52 is connected.

  The movable piece 49 has a plunger valve 54 inserted and fixed therein to close the relief 52 of the fixed piece 50, and a valve rod 55 attached to the nozzle pipe 44 side, and the valve rod 55 is tapered. A needle valve 56 for opening and closing the ejection port 43 of the nozzle pipe 44 is formed at the tip thereof. Further, the movable piece 49 is constantly pressed toward the nozzle pipe 44 by the urging force of the spring 51, whereby the needle valve 56 closes the ejection port 43.

  In the vaporizer 2 configured as described above, when the operation start is instructed, the power supply to the heater 46 is started, and the vaporizer 40 is heated by the heat generated by the heater 46. When the temperature of the vaporizing section 40 rises to a temperature at which the fuel can be vaporized, the electromagnetic pump 7 starts. As a result, the fuel is sent into the vaporizing section 40, and the fuel is heated and vaporized to become a vaporized gas, and flows into the nozzle pipe 44 through the communication port 47.

  Immediately before or after the start of the electromagnetic pump 7, the solenoid coil 45 is energized, and the movable piece 49 is attracted by the magnetic force of the solenoid coil 45 and slides toward the fixed piece 50. When the movable piece 49 slides, the valve rod 55 also moves to the fixed piece 50 side, so that the needle valve 56 provided at the tip of the valve rod 55 opens the ejection port 43, and the plunger valve 54 further moves the fixed piece 50. The vaporized gas flowing into the nozzle pipe 44 is ejected from the ejection port 43 toward the burner 3 in order to close the relief portion 52 of the nozzle pipe 44.

  The upper part of the combustion chamber 4 has an opening 4 a through which the combustion exhaust gas generated by the burner 3 is discharged, and a heat shield plate 11 is provided so as to cover the combustion chamber 4. A space between the combustion chamber 4 and the heat shield plate 11 is configured as a hot air passage 12 that mixes combustion exhaust gas and air from the blower 8 to generate hot air.

  FIG. 4 is an enlarged cross-sectional view of the outlet, FIG. 4A is a cross-sectional view illustrating a state where the movable blade is closed, and FIG. 4B is a cross-sectional view illustrating a state where the movable blade is opened at a predetermined angle. In the warm air heating apparatus of the present embodiment, the outlet 9 has three movable blades 13 rotatable up and down, and two fixed non-rotating fixed blades disposed between the movable blades 13 and extending in the horizontal direction. The blade 14 is provided. When the operation is stopped, the movable blade 13 is closed as shown in FIG. 4A, and during combustion in the burner 3, a blade drive motor 23 which will be described later rotates to drive the movable blade 13. 4B, the movable blade 13 is in an open state. In the following description, the angle of the movable blade 13 indicates an angle indicated by θ in the drawing.

  The movable blade 13 can be turned up and down according to the amount of combustion in the burner 3, and adjusts the angle at which hot air is blown out. On the other hand, the fixed blade 14 has a role of guiding the hot air that has passed through the hot air passage 12 to the front. When the length of the movable blade 13 in the vertical direction (the length in the vertical direction in FIG. 4A) is long, the interval between the blades becomes large, so that the warm air that has passed through the hot air passage 12 Although it tends to flow downward from between, the provision of the fixed blades 14 allows the hot air to be blown out toward the front of the main body 1, so that the hot air can be efficiently discharged in the intended direction. it can. In particular, when the hot air passage 12 is directed downward and the hot air is blown down, as in the present embodiment, the fixed blades 14 exhibit more effects. In addition, the structure which does not provide the fixed blade | wing 14 may be sufficient.

  FIG. 5 is a perspective view of a mechanism for driving the movable blade, and FIG. 6 is a front view of the mechanism. The air outlet 9 having the movable blade 13 is attached to the main body 1 by a support fitting 20.

  The supporting bracket 20 includes a cooperating cam 22 connected to the movable blade 13 via a rotating shaft 21, a blade drive motor 23 for driving the movable blade 13, and a driving cam connected to the blade drive motor 23. 24 and a blade operation detecting means 25 for detecting the operation of the movable blade 13 are provided. Further, a guide hole 26 for guiding the rotation operation of the cooperation cam 22 about the rotation shaft 21 is provided.

  The cooperation cam 22 has two pins (a first pin 221 and a second pin 222). The first pin 221 is connected to the rotation shaft 21, and the second pin 222 is connected to the drive plate 27 slidably provided on the support bracket 20. Below the driving plate 27, a shielding piece 29 corresponding to a blade operation detecting means 25 described later is provided.

  A drive shaft 241 extending from the drive cam 24 is locked to the drive plate 27, and one end of a spring member 28 attached to the tip of the drive shaft 241 is attached to the drive plate 27. The spring member 28 applies a restoring force to return the movable blade 13 to its original position when a force is applied to the movable blade 13 from the outside. When the movable blade 13 is fixed at a predetermined position by the blade drive motor 23, even if the movable blade 13 is closed by touching the hand, the hand is separated and external force does not act. Sometimes the restoring force can automatically return to the original position.

  The blade drive motor 23 is constituted by a stepping motor that can rotate forward and backward, and its rotation is controlled based on an instruction from a control unit 30 described later. When the driving cam 24 is rotated by the rotation of the blade drive motor 23, the driving plate 27 moves up and down, and the vertical movement of the driving plate 27 causes the movable blade 13 to rotate up and down via the cooperation cam 22. That is, when the driving plate 27 moves downward, the cooperation cam 22 rotates in the direction of the arrow A, and the movable blade 13 rotates upward. Conversely, when the drive plate 27 moves upward, the cooperation cam 22 rotates in the direction of arrow B, and the movable blade 13 rotates downward. The fact that the movable blade 13 has turned upward and reached the predetermined angle is detected by the blade operation detecting means 25.

  The blade operation detecting unit 25 is configured by, for example, a photo interrupter including a light emitting unit 251 and a light receiving unit 252 arranged to face the light emitting unit 251. When the movable blade 13 is rotated upward by rotating the blade drive motor 23, the drive plate 27 moves downward. Then, when the angle of the movable blade 13 becomes a predetermined angle, the shielding piece 29 enters between the light emitting unit 251 and the light receiving unit 252 to block the light from the light emitting unit 251. That is, when the light receiving unit 252 cannot detect light, it is determined that the movable blade 13 has reached the predetermined angle. The configuration of the blade operation detecting means 25 is not limited to this, and another detecting method may be used.

  FIG. 7 is a block diagram showing a configuration of the hot air heating device. The control unit 30 including a microcomputer includes a room temperature detecting unit 17 for detecting a room temperature, various buttons provided on the operation unit 16 (for example, an operation button 161 for instructing start and stop of operation, a room temperature setting for setting a temperature). Buttons 162, an operation mode setting button 163 for setting an operation mode, a blade operation detection unit 25 for detecting the operation of the movable blade 13, and a vaporization unit temperature detection unit 18 for detecting the temperature of the vaporizer 2 are received. Then, it outputs control signals to the ignition heater 5, the electromagnetic pump 7, the blower 8, the heater 46, the solenoid coil 45, and the blade drive motor 23 to control the heating operation.

  The control unit 30 includes a combustion amount control unit 31 that calculates and determines the amount of combustion in the burner 3, a blower control unit 32 that controls the rotation of the blower 8, and a blade drive motor control that controls the rotation of the blade drive motor 23. Means 33, a heater control means 34 for controlling the power supply to the heater 46, a solenoid control means 35 for controlling the power supply to the solenoid coil 45, and an ignition control means 36 for controlling the power supply to the ignition heater 5. You. The configuration in the figure is an example of the hot air heating apparatus according to the present embodiment, and may include other components other than those illustrated.

  Further, the hot air heating apparatus of the present invention is provided with a plurality of operation modes so as to be switchable, and the operation mode is selected by operating the operation mode setting button 163 of the operation unit 16. The operation mode includes a movable mode in which the movable blade 13 is vertically rotated within a preset angle range, and a fixed mode in which the movable blade 13 is fixed at a preset angle. In any mode, the angle of the movable blade 13 is set according to the combustion amount determined by the combustion amount control means 31.

  For example, the movable blade 13 when the combustion amount is a large thermal power repeatedly moves up and down between 70 and 80 degrees in the movable mode, and is fixed at 75 degrees in the fixed mode. When the combustion amount is small, the movable blade 13 repeatedly moves up and down between 60 and 75 degrees in the movable mode, and is fixed at 65 degrees in the fixed mode. At the time of intermediate thermal power, the angle is set between the large thermal power and the small thermal power. Note that the above-described angle is an example and can be set as appropriate.

  Regardless of the operation mode, the movable blade 13 is set to have a larger angle when the combustion amount is large than when the combustion amount is small. In other words, when the amount of combustion is large, the blowout angle of the warm air is increased to carry the warm air far, and the opening area is increased to effectively prevent the heat from being trapped in the main body 1. Can be. In addition, when the combustion amount is small, the feet can be warmed by directing the blow-out opening downward, thereby increasing the heating efficiency.

  In the heating device having the above-described configuration, the blade operation determination for confirming whether the movable blade 13 operates normally before starting the combustion is performed. That is, when the operation button 161 is operated to instruct the start of the operation, the blade operation determination is performed before the combustion in the burner 3 is started. In the blade operation determination, the control unit 30 rotates the blade drive motor 23 to rotate the movable blade 13 upward, and determines whether the blade operation detection unit 25 detects that the movable blade 13 has reached the predetermined angle. I do. When the movable blade 13 reaches a predetermined angle (first angle), it is determined that the movable blade 13 operates normally, and combustion can be started. On the other hand, when the movable blade 13 has not reached the first angle within the predetermined time, it is determined that the movable blade 13 does not operate normally, and the combustion operation is not started.

  If there is an obstacle on the front surface of the main body 1 and the movement of the movable blade 13 is restricted, or if the blade drive motor 23 breaks down, the movable blade 13 may not operate normally. If the movable blade 13 does not operate normally and remains closed even after the start of combustion, or if the angle of the movable blade 13 is smaller than the set angle, the blowing of warm air is hindered. As a result, the main body 1 and the floor surface are heated, thereby causing a problem of impairing safety. Therefore, by performing the blade operation determination before starting the combustion, it is possible to prevent the combustion from being started in a state where the movable blade 13 does not operate properly, and to use the heating device safely. . Furthermore, since the movable blade 13 rotates based on the instruction to start the operation, the user can visually confirm that the operation has been started.

  The arrival of the movable blade 13 at the first angle is detected by the blade operation detection unit 25. Here, the first angle refers to an angle equal to or greater than the maximum angle of the movable blade 13 during normal operation. In the present embodiment, since the maximum angle of the movable blade 13 during normal operation is set to 80 degrees (the maximum angle in the movable mode), the first angle may be 80 degrees or more. In the blade operation determination, after the blade operation detecting means 25 detects that the movable blade 13 has reached the first angle, the blade driving motor 23 is further rotated to mechanically rotate the movable blade 13. An operation of opening up to the upper limit angle which is the maximum angle may be performed.

  In addition, the blade operation determination can be performed a plurality of times. In the case of a heating device having a structure in which the liquid fuel is vaporized by heating the heater 46 as in the present embodiment, the operation of the heater 46 is started after an operation start instruction is issued, and the temperature of the vaporization unit 40 decreases the temperature of the fuel. Combustion starts after reaching a temperature at which vaporization is possible. That is, a period of several tens of seconds to several minutes is required as a preheating time from when the operation start instruction is given to when the combustion is actually started by the burner 3. Therefore, by performing the blade operation determination a plurality of times during this preheating time, it is reliably detected that the movable blade 13 is not operating correctly before the start of combustion, and the movable blade 13 is not operated properly. Can be prevented from starting combustion.

  FIG. 8 is a flowchart illustrating an example of the above-described blade operation determination. While the operation is stopped, as shown in FIG. 4A, the movable blade 13 is closed and the outlet 9 is closed. When it is detected in step 1 that the operation start has been instructed, the blade drive motor 23 is rotated so as to rotate the movable blade 13 upward (step 2), and the power supply to the heater 46 is started (step 3). The rotation of the blade drive motor 23 and the energization of the heater 46 may be started simultaneously.

  When the blade drive motor 23 starts rotating in step 2, the movable blade 13 rotates upward. Therefore, it is determined whether the angle of the movable blade 13 has reached the first angle based on the detection result of the blade operation detection unit 25. First blade operation determination "is executed (step 4). The first blade operation determination is an operation determination performed during preheating of the vaporizer 2. If there is an obstacle on the front surface of the main body 1 or the blade drive motor 23 has failed, the movable blade 13 cannot reach the first angle even if the blade drive motor 23 is rotated. Therefore, it is determined whether a predetermined time (for example, 10 seconds) has elapsed since the rotation of the blade drive motor 23 has started (step 5), and the movable blade 13 has reached the first angle even after the predetermined time has elapsed. If is not detected, it is determined that there is some abnormality in the operation of the movable blade 13 and the operation is stopped (step 6). By executing the first blade operation determination, an abnormality in the operation of the movable blade 13 is determined at the start of operation, and if an abnormality is detected, combustion is not started, so that the heating device can be used safely.

  On the other hand, when it is detected in the first blade operation determination that the movable blade 13 has reached the first angle (Yes in step 4), it is determined that the movable blade 13 is operating normally, and then the vaporizing unit is determined. It is determined whether the temperature of 40 has reached a predetermined temperature at which fuel can be vaporized (step 7). When it is detected that the temperature of the vaporizing section has reached the predetermined temperature (Yes in step 7), it is determined that the preheating of the vaporizing device 2 has been completed (step 8), and energization of the ignition heater 5 is started (step 9). .

  Subsequently, a “second blade operation determination” is performed, which determines whether the angle of the movable blade 13 has reached the first angle based on the detection result of the blade operation detection unit 25 (step 10). This “second blade operation determination” is an operation determination performed after the preheating of the vaporizer 2 is completed.

  Although it depends on the heat capacity of the vaporizer 2 and the amount of heat of the heater 46, it takes several tens seconds to several minutes from the start of the preheat of the vaporizer 2 to the completion of the preheat. Even if it is confirmed that the movable blade 13 operates normally in the first blade operation determination, if the movable blade 13 is pressed by hand during the preheating of the vaporizer 2 or the like, the movable blade 13 is not moved when the combustion actually starts. The angle may change. Therefore, after the movable blade 13 is confirmed to operate normally in the first blade operation determination, the second blade operation determination may be performed when the preheating of the vaporizer 2 is completed, and the combustion operation may be performed. Is determined.

  If it is confirmed in step 4 that the movable blade 13 operates normally, the control unit 30 stops the rotation of the blade drive motor 23, and the movable blade 13 is opened at the first angle (or the upper limit angle). It is fixed in the state where it was set. The second blade operation determination is performed while the movable blade 13 is fixed at the first angle.

  In the second blade operation determination, when the blade operation detecting means 25 does not detect the movable blade 23 (No in Step 10), it determines that the angle of the movable blade 13 is abnormal and stops the operation (Step 11). By performing the second blade operation determination, the abnormality of the angle of the movable blade 13 is determined before the start of combustion, and if the abnormality is detected, the combustion is not started, so that the heating device can be used safely. .

  If the movable blade 13 is detected to be at the first angle in the second blade operation determination (Yes in Step 10), the electromagnetic pump 7 is driven to start supplying fuel to the vaporizer 2 (Step 12). Power is supplied to the solenoid coil 45 (step 13). When the electromagnetic pump 7 is driven, fuel is supplied into the vaporizing section 40, and the fuel is heated and vaporized in the vaporizing section 40 to become a vaporized gas, and the vaporized gas flows into the nozzle pipe 44 through the communication port 47. Thereafter, when the solenoid coil 45 is energized, the needle valve 56 opens the ejection port 43, and the vaporized gas flowing into the nozzle pipe 44 is ejected from the ejection port 43 toward the burner 3. The vaporized gas ejected to the burner 3 is ignited by the ignition heater 5 to start combustion.

  As described above, by performing the second blade operation determination before starting the driving of the electromagnetic pump 7, if an abnormality is found in the second blade operation determination, the abnormality is detected before the fuel is supplied to the vaporizer 2. Operation can be stopped. However, the present invention is not limited to this, and the second blade operation determination is performed at least before energizing the solenoid coil 45. The determination of the second blade operation may be performed before the energization of the ignition heater 5 is started in step 9.

  As described above, the movable blade 13 operates normally by performing the first blade operation determination performed during the preheating of the vaporizer 2 and the second blade operation determination performed after the completion of the preheating as the blade operation determination. Since it is checked not only at the start of operation but also before the start of combustion, it is possible to quickly and surely prevent combustion from starting when the movable blade 13 does not operate properly.

  When the first blade operation determination is performed and it is confirmed that the movable blade 13 operates normally, the blade operation determination is not performed until the second blade operation determination is performed. As a result, even if the angle of the movable blade 13 is temporarily changed by touching the movable blade 13 during the preheating of the vaporizer 2, the movable blade 13 has returned to a normal position before starting combustion. If so, the movable blade 13 is determined to be operating normally, so that unnecessary error determination can be suppressed.

  FIG. 9 is a flowchart illustrating another example of the blade operation determination. The timing at which the first blade operation determination is performed is different from that of the embodiment shown in FIG. Hereinafter, only different points from FIG. 8 will be described.

  In the present embodiment, when it is detected that the operation start is instructed in step 21, the blade drive motor 23 is rotated so as to rotate the movable blade 13 upward (step 22), and the first blade operation determination is executed. (Step 23). The “first blade operation determination” in the present embodiment is an operation determination performed before the start of preheating of the vaporizer 2.

  In the first blade operation determination, it is determined whether a predetermined time has elapsed since the start of rotation of the blade drive motor 23 (Step 24), and that the movable blade 13 has reached the first angle even after the predetermined time has elapsed. If is not detected, it is determined that there is some abnormality in the operation of the movable blade 13 and the operation is stopped (step 25). On the other hand, when it is detected that the movable blade 13 has reached the first angle (Yes in Step 23), it is determined that the movable blade 13 is operating normally, and power supply to the heater 46 is started (Step 23). 26).

  As described above, by performing the first blade operation determination performed before the preheating of the vaporizer 2 and the second blade operation determination performed after the completion of the preheating, it is determined whether the movable blade 13 operates normally at the start of operation. In addition, since the check is performed before the start of combustion, it is possible to quickly and reliably prevent the combustion from starting in a state where the movable blade 13 does not operate normally.

2 vaporizer 3 burner 9 outlet 13 movable blade (blade)
23 blade drive motor 25 blade operation detecting means 28 spring member 30 control unit 46 heater

Claims (6)

A burner that burns gaseous fuel,
An outlet that blows out hot air,
A plurality of rotatable blades provided at the outlet,
A blade drive motor for rotating the blade,
Blade operation detecting means for detecting the operation of the blade,
And a control unit for controlling a combustion operation.The control unit performs a blade operation determination to rotate the blade drive motor and check whether the blade operates normally before starting the combustion. apparatus. A vaporizer for vaporizing the fuel,
A heater for heating the vaporizer,
The hot air heating device according to claim 1, wherein the control unit performs the blade operation determination a plurality of times.   3. The hot air according to claim 2, wherein the blade operation determination includes a first blade operation determination performed before or during preheating of the vaporizer and a second blade operation determination performed after completion of preheating of the vaporizer. 4. Heating system.   4. The temperature control device according to claim 3, wherein when the control unit confirms that the blade operates normally by the first blade operation determination, the control unit does not perform the blade operation determination until the second blade operation determination is performed. 5. Wind heating system.   The control unit executes a blade fixing operation for fixing the blade at a predetermined angle when confirming that the blade operates normally by the first blade operation determination, and performs the blade fixing operation during the execution of the blade fixing operation. The hot-air heating device according to claim 4, wherein the second blade operation determination is performed.   The drive mechanism for converting the rotation of the blade drive motor to the rotation of the blade includes a spring member that applies a restoring force to return the blade to its original position when a force is applied to the blade from outside. The hot air heating device according to claim 5.

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