JP2020024070A - Hot air heating device - Google Patents

Abstract

To provide a hot air heating device which can safely be used even when any operation mode is selected in the case that operation modes having different blade operations are made switchable.SOLUTION: A hot air heating device includes a plurality of rotatable movable blades 12 at an air outlet 8, and can switch a movable mode for vertically rotating the movable blades 12 within a set angle range, and a fixed mode for fixing the movable blades to a set angle. Then, a fully opening operation for opening the movable blades 12 up to a fully opened angle in both the movable mode and the fixed mode. Since this cannot only check whether the movable blades 12 normally operate but also correct an angular error and return the angle to a correct position even when manually handled, the hot air heating device can safely be used.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a hot air heating device that generates warm air and heats a room.

  Conventionally, as a heating device of this type, for example, a heat generating means such as a burner is provided in a main body, and a combustion gas generated by the burner and room air taken into the main body are mixed to generate hot air. Is blown out from an outlet provided on a front surface of a main body to heat the room. The outlet is provided with vertically rotatable blades, and the blades are vertically rotated (swinged) in accordance with the amount of hot air to be blown out, thereby making the temperature distribution in the room uniform. There is something that enhances the heating effect.

  Thus, in a heating device having movable blades, for example, when there is an obstacle in the front of the main body, the movement of the blades is limited, or when the blades do not operate properly due to failure of the motor driving the blades, etc. In this case, there is a problem that the blowing of warm air is hindered and the main body and the floor surface are heated. Therefore, it is checked whether the blades are operating correctly, and when the operation cannot be confirmed, the operation is stopped to ensure the safety of the device.

  As a method of checking the operation of the blade, it has been proposed to rotate the blade once to a reference point, for example, a fully opened state, and then return to the original position (for example, Patent Document 1).

Japanese Patent No. 2890996

  By the way, the above-mentioned heating device can be provided with a plurality of operation modes so as to be switchable. The operating method of the movable blade may differ depending on the operation mode, and it may not be possible to confirm whether the blade is operating correctly only by the above-described check.

  An object of the present invention is to provide a hot-air heating device that can be used safely even when any operation mode is selected, when an operation mode in which the operation of the movable blade is different can be switched. .

The present invention provides a heat generating means for generating heat,
An outlet that blows out hot air,
A plurality of rotatable blades provided at the outlet,
A motor for rotating the blade,
Mode setting means for setting an operation mode;
Based on an instruction from the mode setting unit, a movable mode in which the motor is driven to rotate the blade vertically within a set angle range, and a fixed mode in which the blade is fixed at a set angle. An executable control unit,
The control unit is a hot-air heating device that performs a full-open operation of driving the motor to open the blade to a full-open angle in both the movable mode and the fixed mode.

  With the above-described configuration, even in an operation mode in which the blades are not rotated up and down, the displacement of the positions of the blades can be corrected, so that a hot air heating device with higher 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 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 control of the full opening operation | movement in this embodiment. 5 is a timing chart illustrating the operation of the movable blade in the movable mode according to the embodiment.

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

  The present invention includes a plurality of blades that rotate by driving a motor at an outlet that blows warm air, a movable mode in which the blades are rotated up and down within a set angle range, and a setting angle of the blades. And a fixed mode in which the blades can be switched between a fixed mode and a fixed mode. This makes it possible not only to check whether the blades are operating correctly, but also to correct errors in the angle of the blades and to return the blades that have been operated by hand or the like to the correct position. Can be used more safely.

  In the movable mode, when the time required for the blade to reciprocate up and down is defined as the rotation period, the number of times the blade reaches the fully open position is performed by performing the full-open operation at an interval longer than the rotation period. suppress. Thereby, the rising of the hot air is suppressed, and the temperature distribution in the room can be made uniform to improve the heating effect.

  In addition, by setting the execution interval of the full-open operation in the fixed mode to be longer than the execution interval of the full-open operation in the movable mode, it is possible to prevent the blades from operating and feeling annoying in the fixed mode. In addition, the usability can be improved.

  In the movable mode, when the blade reaches the maximum angle or the minimum angle within the operation range, a stop holding operation of stopping and holding the blade at that angle for a predetermined time can be performed, and the stop holding operation can be performed. In this case, the fully open operation is executed after the stop holding operation is completed. Thus, the full-opening operation can be performed while avoiding the feeling of the movement of the blade being fast.

  In the full opening operation, after the angle detecting means detects that the blade has reached a predetermined angle, the driving motor is further rotated to open the movable blade to the upper limit angle which is the maximum angle at which the movable blade can be mechanically rotated. I do. Thus, the mechanical upper limit angle can be used as the base point for driving the motor, so that even if there is an error in the detection angle of the angle detection means, the angle of the movable blade can be corrected without being affected by the error. it can.

  In addition, a non-rotating fixed blade extending in the horizontal direction can be provided. Since the hot air is blown forward along the fixed blade, the hot air can be efficiently discharged in the intended direction.

  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.

  Inside the main body 1, a vaporizer 2 that heats kerosene to be a vaporized gas, a burner 3 as a heat generating unit that burns the vaporized gas generated by the vaporizer 2 to generate heat, The apparatus includes a combustion chamber 4 provided therein, an oil pan 5 for storing kerosene supplied from a fuel tank (not shown), and an electromagnetic pump 6 mounted on the oil pan 5 and pumping the kerosene to the vaporizer 2.

  A blower 7 for taking indoor air into the interior of the main body 1 is attached to the back surface of the main body 1. On the front of the main body 1, an operation unit 15 provided with a number of switches for instructing the operation of the heating device, and an outlet 8 for blowing out hot air are attached. Wings 9 are provided.

  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 10 is provided so as to cover the combustion chamber 4. Between the combustion chamber 4 and the heat shield plate 10 is formed a hot air passage 11 which mixes the combustion exhaust gas and air from the blower 7 to generate hot air.

  In the hot air heating apparatus configured as described above, the combustion exhaust gas generated by the combustion of the burner 3 and the air taken into the main body 1 by the blower 7 are mixed while passing through the hot air passage 11 to generate hot air. The room is heated by discharging into the room from between the blades 9 of the outlet 8.

  FIG. 3 is an enlarged cross-sectional view of the outlet, FIG. 3A is a cross-sectional view illustrating a state where the movable blade is closed, and FIG. 3B is a cross-sectional view illustrating a state where the movable blade is opened at a predetermined angle. In the hot air heating apparatus of the present embodiment, the outlet 8 has three movable blades 12 rotatable up and down, and two fixed non-rotating fixed blades disposed between the movable blades 12 and extending in the horizontal direction. The blade 13 is provided. When the operation is stopped, the movable blade 12 is closed as shown in FIG. 3A, and when the operation is started (combustion by the burner 3 is started), a blade drive motor 23 described later rotates. When the movable blade 12 is driven, the movable blade 12 is opened as shown in FIG. In the following description, the angle of the movable blade 12 indicates an angle indicated by θ in the drawing.

  The movable blade 12 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 13 has a role of guiding the hot air that has passed through the hot air passage 11 forward. When the length of the movable blade 12 in the vertical direction (the length in the vertical direction in FIG. 3A) is long, the interval between the blades is widened, so that the warm air that has passed through the hot air passage 11 Although it tends to flow downward from between, the provision of the fixed blades 13 allows the warm air to be blown out toward the front of the main body 1, so that the warm air can be efficiently discharged in the intended direction. it can. In particular, when the hot air passage 11 is directed downward and the hot air is blown down, as in the present embodiment, the fixed blades 13 exhibit more effects. In addition, the structure which does not provide the fixed blade 13 may be sufficient.

  FIG. 4 is a perspective view of a mechanism for driving the movable blade, and FIG. 5 is a front view of the mechanism. The outlet 8 provided with the movable blade 12 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 12 via a rotating shaft 21, a blade drive motor 23 for driving the movable blade 12, and a driving cam connected to the blade drive motor 23. 24 and an angle detecting means 25 for detecting the angle of the movable blade 12 are provided, and 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. 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 a tip of the drive shaft 241 is attached to the drive plate 27. Further, a shielding piece 29 corresponding to the angle detecting means 25 described below is provided below the driving plate 27.

  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 driving motor 23, the driving plate 27 moves up and down, and the vertical movement of the driving plate 27 causes the movable blade 12 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 12 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 12 rotates downward. The angle detecting means 25 detects that the movable blade 12 has turned upward and reached the predetermined angle.

  The angle detection 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 12 is rotated upward by rotating the blade drive motor 23, the drive plate 27 moves downward. Then, when the angle of the movable blade 12 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 12 has reached the predetermined angle. Note that the configuration of the angle detection unit 25 is not limited to this, and another detection method may be used.

  FIG. 6 is a block diagram illustrating a configuration of the hot air heating device. The control unit 30 composed of a microcomputer includes a temperature detection unit 16 for detecting the indoor temperature, various setting units provided in the operation unit 15 (for example, a room temperature setting unit 17 for setting a temperature, an operation mode setting for setting an operation mode) Means 18) and an input from an angle detecting means 25 for detecting the angle of the movable blade 12 are received. Then, a control signal is output to the heater 14 for heating the vaporizer 2, the electromagnetic pump 6, the blower 7, 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 a combustion amount in the burner 3, a blower control unit 32 that controls the rotation of the blower 7, and a blade drive motor control that controls the rotation of the blade drive motor 23. Means 33. 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.

  In the heating device having the above-described configuration, when the start of operation is instructed, first, energization of the heater 14 is started to heat the vaporizer 2. When the vaporizer 2 reaches a temperature at which the liquid fuel can be vaporized, the electromagnetic pump 6 is driven to supply the liquid fuel to the vaporizer 2, and the liquid fuel supplied to the vaporizer 2 is heated and vaporized to be vaporized gas. Becomes The vaporized gas is supplied to the burner 3 from the tip of the vaporizer 2 and is burned by the burner 3. The combustion exhaust gas generated by the combustion is mixed with the air from the blower 7 to become hot air, and is discharged from the outlet 8.

  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 means 18 of the operation unit 15. The operation mode includes a movable mode in which the movable blade 12 is vertically rotated within a predetermined angle range, and a fixed mode in which the movable blade 12 is fixed at a predetermined angle. In any mode, the angle of the movable blade 12 is set according to the combustion amount determined by the combustion amount control means 31.

  For example, the movable blade 12 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 12 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 12 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 combustion amount is large, the blowing angle of the warm air is made closer to the horizontal and the warm air is carried far, and the opening area is increased to effectively prevent the heat from being trapped in the main body 1. can do. 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.

  Further, during the heating operation, a full-open operation of opening the movable blade 12 to the full-open angle is executed. This full opening operation can be executed at predetermined time intervals. Note that the full open angle here is the same as or greater than the maximum angle of the movable blade 12 during normal operation, and in the present embodiment, the maximum angle of the movable blade 12 during normal operation. Is set to 80 degrees (the maximum angle in the movable mode), so that the full open angle may be an angle of 80 degrees or more. This full opening operation is performed in both the movable mode and the fixed mode.

  If the movable blade 12 does not operate at the set angle due to an obstacle on the front of the main body 1 and the movement of the movable blade 12 is restricted, or the failure of the blade drive motor 23, the blowing of warm air is hindered. This causes a problem that the temperature inside the main body 1 abnormally rises. Therefore, during operation, a full-open operation is performed, and it is checked whether the movable blade 12 is operating properly. If the operation cannot be confirmed, the operation is stopped. Thus, the heating device can be used safely.

  In the movable mode, an error occurs between the actual angle of the movable blade 12 and the control signal output from the blade drive motor control unit 33 by repeating the operation of rotating the movable blade 12 up and down. In addition, it is conceivable that the user changes the angle of the movable blade 12 by hand or the like, and a deviation from the actual angle occurs. Therefore, irrespective of the operation of the movable blade 12, by performing the full-open operation during the heating operation, the fully-open position is used as the starting point of the blade drive motor 23, and the angle error of the movable blade 12 can be corrected or operated manually. The moved movable blade 12 can be returned to a correct position.

  In the fully opening operation, the angle detection unit 25 detects that the movable blade 12 has reached the predetermined first angle. In the fully open operation of the present embodiment, after the angle detecting means 25 detects that the movable blade 12 has reached the first angle, the blade driving motor 23 is further rotated to move the movable blade 12 mechanically. An operation of opening up to the upper limit angle which is an angle is performed. For example, if the first angle is 80 degrees, the upper limit angle is 85 degrees, and this upper limit angle corresponds to the fully open angle. As described above, by controlling the blade drive motor 23 so as to open the movable blade 12 to the upper limit angle, the mechanical upper limit angle is used as the starting point of the motor, whereby the angle detected by the angle detector 25 has an error. Thus, the angle of the movable blade 12 can be corrected without being affected by the error.

  FIG. 7 is a flowchart illustrating an example of control of the full-open operation. When the operation is started, it is determined whether the operation mode is the movable mode or the fixed mode (step 1). In addition, when the operation mode setting unit 18 is operated during execution of each step of the flow described later, the process returns to step 1 each time.

  When the movable mode is set (Yes in Step 1), the movable mode in which the movable blade 12 is rotated in the vertical direction within an angle range set in advance by the combustion amount at that time is started (Step 2) and fully opened. The measurement of the time until the operation is executed is started (step 3). At this time, the execution interval of the full-open operation in the movable mode is a first predetermined time.

  Then, it is determined whether a first predetermined time has elapsed since the start of the time measurement in step 3 (step 4), and when the first predetermined time has elapsed, a full-open operation is started (step 5). When the fully-open operation is started, the blade drive motor 23 is rotated until the movable blade 12 reaches the fully-open position (Step 6), and it is determined whether the movable blade 12 has reached the first angle based on the detection result of the angle detecting means 25 (Step 6). Step 7). When it is detected that the movable blade 12 has reached the first angle (Yes in step 7), it can be determined that the movable blade 12 is operating correctly, and from this, the movable blade 12 is further mechanically driven. The blade drive motor 23 is rotated until the upper limit angle is reached (step 8). When the movable blade 12 reaches the upper limit angle, the timer is reset (step 9), and the full-open operation ends (step 10). Thereafter, the operation returns to the operation in the movable mode.

  Here, assuming that the time required for the movable blade 12 to reciprocate up and down is the rotation period, the first predetermined time, which is the execution interval of the full opening operation in the movable mode, can be longer than the rotation period. . If the rotation cycle of the movable blade 12 is about several tens of seconds (10 to 20 seconds depending on the amount of combustion), the full opening operation is performed every few minutes (for example, every three minutes). By performing the full-open operation at intervals longer than the rotation cycle, the number of times that the movable blade 12 reaches the full-open position can be suppressed, and blow-up of warm air can be suppressed.

  When the fixed mode is set as the operation mode (No in Step 1), the fixed mode is started by moving the movable blade 12 to an angle set in advance according to the combustion amount at that time (Step 12). Measurement of the time until the full-open operation is performed is started (step 13). The execution interval of the full-open operation in the fixed mode is a second predetermined time.

  Then, it is determined whether a second predetermined time has elapsed since the start of the time measurement in step 13 (step 14), and when the second predetermined time has elapsed, a full-open operation is started (step 15). When the full-open operation is started, the blade drive motor 23 is rotated until the movable blade 12 reaches the full-open position (step 16), and it is determined whether the movable blade 12 has reached the first angle based on the detection result of the angle detection means 25 (step 16). Step 17). When it is detected that the movable blade 12 has reached the first angle (Yes in step 17), it can be determined that the movable blade 12 is operating properly, and from this, the movable blade 12 is further mechanically driven. The blade drive motor 23 is rotated until the upper limit angle is reached (step 18). When the movable blade 12 reaches the upper limit angle, the timer is reset (step 19), and the full-open operation ends (step 20). Thereafter, the movable blade 12 is returned to the predetermined angle, and the operation returns to the fixed mode operation.

  In the fixed mode, since the movable blade 12 does not move up and down as in the movable mode, an error in the angle of the movable blade 12 rarely occurs. Therefore, the second predetermined time that is the execution interval of the full-open operation in the fixed mode can be set longer than the first predetermined time that is the execution interval of the full-open operation in the movable mode. For example, when the fully-open operation in the movable mode is at three-minute intervals, the fully-open operation in the fixed mode can be set at ten-minute intervals. Thus, it is possible to prevent the blades from operating and being perceived as troublesome in spite of the fixed mode.

  In Steps 7 and 17, it is determined whether the movable blade 12 has reached the first angle. However, if the angle detecting means 25 has not detected the movable blade 12 even after the predetermined time has elapsed (Step 7). If No is continued in step 17), it is determined that an abnormality has occurred, and the operation of the heating device can be stopped.

  As described above, the heating device according to the present embodiment performs the full-open operation of opening the movable blade 12 to the full-open angle every predetermined time period regardless of whether the movable mode or the fixed mode is set. In addition to checking whether the movable blade 12 is operating correctly, it is possible to correct the angle error of the movable blade 12 and return the movable blade 12 that has been manually operated to the correct position. Thereby, the heating device can be used more safely.

  In addition, after the detection of the angle detecting means 25, the blade driving motor 23 is further rotated to open the movable blade 12 to the upper limit angle which is the maximum angle at which the movable blade 12 can be mechanically rotated. The angle of the movable blade 12 can be corrected without being affected by the error.

  By the way, if the movable blade 12 is constantly moving, the movement may be felt without hesitation, which may impair the usability. Therefore, in the movable mode, when the movable blade 12 reaches the maximum angle or the minimum angle within the set operation range, the movable blade 12 performs a stop holding operation of stopping and holding the movable blade 12 at that angle for a predetermined time. be able to. Thereby, the movable mode can be executed without impairing the usability.

  The stop time of the movable blade 12 in the stop holding operation can be arbitrarily set. In the present embodiment, for example, a stop time of 3 seconds is provided when the maximum angle is reached, and 6 seconds when the minimum angle is reached. Since warm air rises upward, blowing warm air upward may make it difficult for the feet to warm. Therefore, by shortening the stop time at the upper limit angle, it is possible to suppress the rising of the hot air and improve the heating efficiency. When the stop holding operation is executed in the movable mode, the fully open operation is executed after the stop holding operation is completed.

  FIG. 8 is a timing chart showing the operation of the movable blade in the movable mode. Here, a case where the movable blade 12 rotates between 65 degrees and 75 degrees will be described as an example. T1 in the figure indicates a time point at which three minutes, which is the first predetermined time, has elapsed after the end of the previous full opening operation. However, at T1, since the stop holding operation is being executed, the full opening operation is not executed until the stop holding operation is completed. Then, since the stop holding operation ends at T2, the full-open operation starts at T2. In the full opening operation, at T3, the angle detecting means 25 detects the first angle of 80 degrees, and then further rotates the blade driving motor 23 to reach the mechanically rotatable upper limit angle of 85 degrees. Is performed. Then, when the movable blade 12 reaches the upper limit angle at T4, the full-open operation ends, and thereafter, the operation returns to the operation in the movable mode. After performing the full-open operation in the movable mode, the movable blade 12 rotates downward toward the minimum angle of 65 degrees of the rotation range.

3 burner (heat generating means)
8 outlet 12 movable blade (blade)
13 fixed blade 18 operation mode setting means 23 motor (blade drive motor)
25 angle detecting means 30 control unit

Claims (6)

Heat generating means for generating heat;
An outlet that blows out hot air,
A plurality of rotatable blades provided at the outlet,
A motor for rotating the blade,
Mode setting means for setting an operation mode;
Based on an instruction from the mode setting unit, a movable mode in which the motor is driven to rotate the blade vertically within a set angle range, and a fixed mode in which the blade is fixed at a set angle. An executable control unit,
The hot air heating device, wherein the control unit drives the motor to perform a full-open operation of opening the blade to a full-open angle in both the movable mode and the fixed mode.   The hot-air heating device according to claim 1, wherein the control unit executes the full-open operation at intervals longer than a rotation cycle of the blade in the movable mode. The control unit executes the full-open operation at predetermined intervals in the fixed mode,
The hot-air heating device according to claim 2, wherein an interval at which the full-open operation is performed in the fixed mode is longer than an interval at which the full-open operation is performed in the movable mode.   When the blade reaches the set maximum angle and minimum angle in the movable mode, the control unit executes a stop holding operation of holding the blade at that angle for a predetermined time, and performs the full opening operation of the stop holding operation. 4. The hot-air heating device according to claim 2, which is executed after termination. An angle detecting means for detecting an angle of the blade,
The said full opening operation | movement is operation which opens the said blade further to the maximum angle which can be rotated mechanically, after the said angle detection means detects that the said blade rotated upward to the predetermined angle. The hot air heating device according to any one of the above.   The hot-air heating device according to any one of claims 1 to 5, wherein the air outlet has at least one non-rotating fixed blade extending in a horizontal direction.

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