JPH11125469A - Variable blade drive controller for hot air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure safety while satisfying the swing motion by driving a movable blade further upward or downward when an uppermost or lowermost oscillation angle is reached and stopping a heat generating means when an upward or downward motion' can not be confirmed. SOLUTION: An oscillation designation signal S25a from an oscillation designating means 25 comprising a switch, or the like, at an operating section designates to start operation at an oscillation control section 26. An operation angle designating signal S26a for swinging a variable blade is delivered to a variable blade drive section 24 and the oscillation angle is set at an uppermost or lowermost oscillation angle. A signal S26b is delivered from an oscillation control section to an abnormality confirming timer 27 at that moment to start measurement of time. When upward or downward motion of the variable blade is not recognized within a specified time being set by the abnormality confirming timer 27, a heat generating means, i.e., a burner 3, is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hot air heater.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 9, a hot air heater of this kind, for example, a fan heater is provided with a combustion gas and a blower 97 provided on the back surface of a main body 91 from a heat generating means 93 such as a burner provided in a main body 91. And warm air by blowing the hot air from a hot air outlet 92 provided on the front surface of the main body.

A large number of fixed horizontal louvers 99 are provided in the hot air outlet 92 to guide the hot air in a substantially horizontal direction.

However, since the louver 99 provided at the hot air outlet 92 is fixed to the main body, the direction of blowing hot air cannot be changed. There is a problem that a large difference occurs in the temperature distribution.

[0005] That is, during strong heating, the blower 97 blows strong air, so that warm air is blown out to a far distance, so that the living space normally used by the user (the space excluding the ceiling and the corners of the room) has a substantially uniform temperature distribution. However, the amount of air blown from the blower 97 also becomes weaker as the heating becomes medium and weak and weak, so that the draft action of the warm air becomes relatively strong and the reach of the warm air is shortened. There was a large difference in the room temperature distribution between strong, medium, and weak, such as uneven temperature distribution in which only the vicinity of 91 became hot, and the user felt discomfort.

Therefore, there is a type in which the louver is rotated in the vertical direction according to the amount of combustion or hot air. By making this louver a variable wing system, the direction of hot air blowing up and down changes according to strong, medium and weak, so the indoor temperature distribution is better than that of the conventional one, and a more comfortable heating effect Can now be obtained.

Some recent fan heaters have a function of aiming at a heating effect in addition to improving the indoor temperature distribution by using the variable blades.

In other words, warming means that a person located in front of the warm air heater attempts to warm directly by the warm air, and in this case, only the feet are warmed by the warm air flowing downward, and the warm air is applied to the entire body. I couldn't do it, and I didn't really feel the heat.

If the variable wings are fixed upward, the warm air is drafted and the vertical temperature unevenness in the room becomes large, and conversely, the feet are felt cold.

Therefore, the swinging means is provided in the operation unit to periodically swing (swing operation) the variable blades with priority regardless of the output from the heat amount control unit, thereby changing the blowing direction of the warm air. Can be used to swing up and down,
Warm air hits the entire body of a person located in front of the hot air heater body, and the effect of increasing the perceived temperature can be obtained.

In the variable wing system as described above, the variable wings are fixed at the weak heating position or changed from the weak heating to the strong heating depending on, for example, children's mischief during the strong heating. If the variable wing does not switch to the strong heating position for some reason despite
There is an adverse effect such as heating of the device main body or discoloration of the floor surface due to obstruction of the blowing of warm air, and there has been a problem in safety.

Therefore, the operation of the variable wing is checked at regular intervals, and measures have been taken to prevent operation from continuing with the variable wing abnormal.

Specifically, when the variable wing is operated upward or downward beyond the normal operating range of the variable wing, a switch or the like is turned on.
By adopting a structure in which N is set, the reference point of the operating angle of the variable wing can be detected. And this is done by operating the variable wing in a certain direction such as a switch at regular intervals,
By confirming whether the switch can be turned on within a predetermined time, it is possible to detect a case where the variable wing is fixed, a failure of a motor that operates the variable wing, and the like.

[0014]

However, in the above-described conventional configuration, if the operation check of the variable blade is performed at regular intervals during the swing operation, the variable blade is suddenly moved after the operation check time elapses regardless of the swing operation. Since the switch turns in a certain direction, the vertical turning direction may suddenly reverse, and the user may feel uncomfortable as if the swing operation was not working properly. Become.

In addition, if the cycle of checking the operation of the variable wing is short, the swing operation is frequently broken, and the utility at the time of the original swing operation is reduced.

Further, the frequency of checking the operation of the variable wing increases, so that the ON / OFF frequency of the reference point detection switch and the like increases, thereby shortening the contact life of the switch. There was a problem that the safety could be impaired due to the inability to perform.

[0017]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a main body having a hot air outlet, heat generating means provided in the main body, and supplying air to the heat generating means. A blower that blows out hot air from a hot air outlet, and a variable wing that is swingable up and down provided in the hot air outlet,
A variable wing drive section for operating the variable wing in the vertical direction, a swing control section for outputting a swing angle to the variable wing drive section, and a variable wing being periodically transmitted from the swing control section to the variable wing drive section. Swing instructing means for instructing the swing control section to output the swing angle, and the swing angle output from the swing control section in response to an instruction from the swing instructing means is the highest swing angle or the highest swing angle. When the lower angle is reached, the variable wing is forcibly driven further upward or downward via the swing control unit, and when the upward or downward movement based on the drive signal is not confirmed, The apparatus has a check unit for stopping the heat generating means.

According to the above invention, the variable wing is further rotated upward or downward from the time when the variable wing reaches the uppermost swing angle or the lowermost swing angle, and moves upward or downward. Since the swing operation check is performed, a periodic operation check can be performed without breaking the swing operation during the swing operation.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 has a main body having a hot air outlet, a heat generating means provided in the main body, and
A blower for supplying air to the heat generating means to blow hot air from the hot air outlet, a variable wing provided in the hot air outlet which can swing up and down, and a variable wing for operating the variable wing in a vertical direction; A driving unit, a swing control unit that outputs a swing angle to the variable blade drive unit, and an instruction to output the variable blade from the swing control unit to the variable blade drive unit so as to periodically swing the variable blade. Swing instructing means, and when the swing angle output from the swing control unit at the instruction from the swing instructing means becomes the highest swing angle or the lowest swing angle, A drive unit for driving the variable wing further upward or downward through the swing control unit, and a check unit for stopping the heat generating means when no upward or downward movement based on the drive signal is confirmed. It is provided.

When the swing operation is checked at the time when the variable wing reaches the highest swing angle or the lowest swing angle), it is further driven upward or downward to confirm its upward or downward movement. Therefore, the operation can be checked periodically without breaking the swing operation during the swing operation, so that safety can be secured while satisfying the function of the swing operation.

According to a second aspect of the present invention, the timer starts counting when the check section is activated. After the check is completed, the swing angle is the highest swing angle or the highest swing angle until the timer count is completed. 2. The variable blade drive control device for a hot air heater according to claim 1, further comprising a timer timing means for preventing the check from being started again even when the lower angle is reached.

By providing a time element in the swing operation check, the ON / OFF frequency of the switch is reduced, and the life of the contact is extended.

According to a third aspect of the present invention, the number of times that the swing angle becomes the highest swing angle or the lowest swing angle does not reach a predetermined number of times set beforehand so that the check is not started again. Means are provided.

By providing a count element in the swing operation check, the ON / OFF frequency of the switch is reduced, and the life of the contact is extended.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an operation block diagram of a variable blade drive control device according to Embodiment 1 of the present invention. FIG.
Is a flowchart showing the operation of the device, FIG. 3 is a cross-sectional view of a heater using the device, and FIG. 4 is a detailed view of a main part of a variable blade drive unit using the device.

In FIG. 3, reference numeral 1 denotes a heater body, 2 denotes a hot air outlet, and 3 denotes a heat generating means such as a burner provided in the heater body 1. In this embodiment, a vaporizing burner that vaporizes and burns kerosene is used.

4 is a combustion cylinder which covers the upper part of the burner 3;
Is a duct provided in the heater main body 1 so as to cover the combustion tube 4, and an opening 6 is formed on the front surface.

Numeral 7 denotes a convection blower mounted so as to face the rear of the duct 5. The room air sucked from the back of the heater main body 1 is supplied into the duct 5, and the combustion tube 4 in the duct 5 is provided.
The hot air is blown out from the hot air outlet 2 by being mixed with the combustion gas from the air.

Reference numeral 8 denotes an outlet frame provided in the opening 6 of the duct 5, and 9 denotes a variable blade provided in the outlet frame 8 so as to be located above the hot air outlet 3, substantially above the outlet frame 8. Widely formed to cover half.

As shown in FIG. 4, the variable wings 9 have shafts 13 projecting from both ends thereof penetrating through a metal fitting (not shown) attached to the heater body side plate 1a so as to be rotatable as shown by an arrow d. The motor is driven by a forward / reverse rotating stepping motor 10 connected to the shaft 13.

A switch lever 11 is provided at one end of the variable wing 9, and comes into contact with a switch button 12a of a limit switch 12 fixed to a support fitting (not shown) attached to the main body side plate 1a. The limit switch 12 is configured to operate when 9 is vertical, that is, at a reference point where the hot air outlet 2 is closed by the variable blade 9.

Reference numeral 20 in FIG. 3 denotes a control unit for controlling the hot air heater, which is configured as shown in the control block diagram of FIG.

That is, reference numeral 21 denotes a combustion control unit which is a heat generation control unit, which compares a signal S22 from a temperature detection unit 22 composed of a thermistor or the like with a signal S23 from a room temperature setting unit 23 for setting the room temperature. The signal S21a according to the difference
Controls the combustion amount of the burner 3 and the air flow of the convection blower 7 by the signal S21b so that the room temperature becomes the temperature set by the room temperature setting unit 23, and also outputs the signal S21c to the variable blade drive unit 24. I do.

Reference numeral 25 denotes a swing instructing means comprising a switch or the like of an operation unit, and outputs a swing instruction signal S25a by operating the switch or the like.

Reference numeral 26 denotes a swing control unit which is a swing instruction signal S25a.
And outputs an operation angle instruction signal S26a to cause the variable wing to perform a swing operation (repeatedly swing between X and Z in FIG. 7), and the instruction angle of the swing operation is the lowest angle. At the point of time when it reaches (Z position in FIG. 7), an instruction signal S26b is output to confirm the operation.

When the signal S26a is input, the variable wing drive unit 24 drives the stepping motor 10 by the signal S24 at the angle designated to perform the swing operation. If the signal S26a is not input,
The stepping motor 10 is driven by the signal S24 based on the signal S21c so that the stepping motor 10 is operated not at the swing operation but at an angle corresponding to the combustion amount.

Reference numeral 24a denotes a check unit provided in the control unit 20. The check unit 24a includes a swing control unit 26, a variable blade drive unit 24, and an abnormality confirmation timer 27.

The abnormality confirmation timer 27 starts counting when the signal S26b from the swing control unit 26 is input, and is stopped by the signal S12 from the limit switch 12. If the signal S12 has not been input even after the elapse of a predetermined time (for example, about 30 seconds), an instruction signal S27 is output to the combustion control unit 21 to stop the combustion.

Therefore, as the swing operation of the variable wing, the operation is confirmed when the lowermost angle (Z position in FIG. 4) is reached, and the actual operation is performed between X and fully closed in FIG. Will repeat.

Next, the operation will be described with reference to the flowchart of FIG. When the power is turned on to the device, the control unit 20
Starts, device control is started according to the procedure of the control program shown in the flowchart of FIG.

First, in step 31, it is determined whether or not a swing instruction has been given from the swing instructing means 25. If a swing instruction has been given, the process proceeds to step 32 (omitted if no swing instruction has been given). .

In step 32, it is determined in which direction upward or downward the swing operation is currently going to be made, and if it is upward (fully open direction), the process proceeds to step 33, and downward (fully closed direction). Step 34 if any
Proceed to.

In step 33, it is determined whether or not the current operation angle has reached the uppermost angle of the swing (X position in FIG. 7). If not, the operation proceeds to step 35 in order to continue the upward operation to reach the swing angle. Step 36: If it has arrived, switch to a downward operation to reverse the operation.
Proceed to.

In step 34, it is determined whether or not the current operation angle has reached the lowermost angle of the swing (the Z position in FIG. 7). If not, the process proceeds to step 36 in order to continue the downward operation to reach the swing angle. Proceed, and if it has arrived, the processing after step 37 is performed to confirm the operation of the variable wing.

In step 37, the abnormality confirmation timer is set to a preset time (for example, a time of about 30 seconds).
To start.

In step 38, the operation is performed further downward (fully closed direction in which the limit switch is turned on) from the lowest angle (the Z position in FIG. 7).

At step 39, the limit switch is turned on.
The limit switch is turned on if it is ON.
The process proceeds to step 41 in order to confirm the FF. If not, the process proceeds to step 40.

At step 40, it is determined whether or not the time of the abnormality confirmation timer has elapsed, and if it has elapsed, it is determined that the limit switch cannot be turned on even after the predetermined time has elapsed, so that it is determined that the operation is abnormal. Proceed to 45 to stop the operation.

In step 41, the abnormality confirmation timer is set to a preset time (for example, a time of about 30 seconds).
To start.

In step 42, the operation is performed in the direction of the lowest angle (Z position in FIG. 7) (direction of turning off the limit switch) in order to return from the fully closed angle to the swing operation.

In step 43, the limit switch is turned off.
It is determined whether or not F has been turned off. If it has been turned off, it is determined that the operation check of the variable wing has been completed normally, and the process proceeds to step 35 to perform the normal swing operation again, and the upward operation is restarted. If the limit switch has not been turned off, the process proceeds to step 44.

In step 44, it is determined whether or not the time of the abnormality confirmation timer has elapsed. If the time has elapsed, it is determined that the limit switch cannot be turned off even if the predetermined time has elapsed, so that it is determined that the operation is abnormal. Proceed to 45 to stop the operation.

In steps 35 and 36, the output is output from the variable wing drive unit 24 to perform upward and downward operations, respectively, and the process returns to step 31 again.

The above steps 31 to 45 are repeatedly controlled. (Embodiment 2) FIG. 5 is an operation block diagram of a variable blade driving device according to Embodiment 2 of the present invention, and FIG. 6 is a flowchart showing the operation of the device.

The difference from the first embodiment is that an operation confirmation permission timer 28 for starting time measurement by the confirmation instruction signal S26b of the oscillation control section 26 is provided in the check section 24a. This is where the confirmation instruction signal S26b from the unit 26 is not output.

The same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. Next, the operation will be described.
The swing control unit 26 starts the operation in accordance with the instruction of the swing instruction signal S25a, and an operation angle instruction signal S2 for causing the variable wing to perform a swing operation (repeatedly swing between X and Z in FIG. 4).
6a is output, and at the time when the instruction angle of the swing operation reaches the lowest angle (the Z position in FIG. 4), if the time-up signal S28 of the operation confirmation permission timer 28 is input, an instruction to confirm the operation is issued. The signal S26b is output.

The operation confirmation permission timer 28 starts counting when the signal S26b from the swing control section 26 is inputted, and when a predetermined time (for example, about 30 minutes) elapses, an operation confirmation permission signal is output. S28 is output to the swing control unit 26.

The above operation will be described in more detail with reference to the flowchart of FIG.
When the control unit 20 is started, device control is started according to the procedure of the control program shown in the flowchart of FIG.

In step 34, it is determined whether or not the current operation angle has reached the lowermost angle of the swing (the Z position in FIG. 4). If not, the process proceeds to step 36 in order to continue the downward operation to reach the swing angle. Go to step 46 if it has reached.

In step 46, it is determined whether or not the time of the operation confirmation permission timer has elapsed. If not, it is determined that the operation confirmation is not permitted, and the process proceeds to step 35 to perform the normal swing operation again. Operation is restarted. If the time has elapsed, the process proceeds to step 47, in which the operation check permission timer is started for a preset time (for example, a time setting of about 30 minutes), and then the processing after step 37 is performed to check the operation of the variable wing. Is carried out.

The above steps 31 to 47 are repeatedly executed. (Embodiment 3) FIG. 7 is an operation block diagram of a variable blade driving device according to Embodiment 3 of the present invention, and FIG. 8 is a flowchart showing the operation of the device.

The difference from the first embodiment is that an operation check permission counter 29 for counting the number of swings based on the check instruction signal S26b of the swing control section 26 is provided in the check section 24a. The inside is where the confirmation instruction signal S26b from the swing control unit 26 is not output.

The same parts as in the first embodiment are given the same numbers and their explanation is omitted. Next, the operation will be described.
The swing control unit 26 starts the operation in accordance with the instruction of the swing instruction signal S25a, and an operation angle instruction signal S2 for causing the variable wing to perform a swing operation (repeatedly swing between X and Z in FIG. 4).
6a, when the instruction angle of the swing operation reaches the lowermost angle (the Z position in FIG. 4), if the count-up signal S29 of the operation confirmation permission counter 29 has been input, an instruction to confirm the operation is issued. The signal S26b is output.

The operation confirmation permission counter 29 starts counting when the signal S26b is input from the swing control section 26, and every time the designated angle of the swing operation reaches the lowest angle (the Z position in FIG. 4). Update the count to
A predetermined number of times set in advance (for example, about 100 times)
Is passed, the operation confirmation permission signal S29 is transmitted to the swing control unit 2
Output to 6.

The above operation will be described in more detail with reference to the flowchart of FIG.
When the control unit 20 is started, device control is started according to the procedure of the control program shown in the flowchart of FIG.

In step 34, it is determined whether or not the current operation angle has reached the lowest angle of the swing (the Z position in FIG. 4). If not, the flow proceeds to step 36 in order to continue the downward operation to reach the swing angle. Go to step 48 if it has reached.

In step 48, the count value of the operation check counter is updated by one step. In step 49, it is determined whether or not the count value of the operation confirmation permission counter has exceeded a predetermined number. If not, it is determined that the operation confirmation is not permitted, and the process proceeds to step 35 to perform the normal swing operation again. Restart the operation. If it has exceeded the predetermined number, the process proceeds to step 50, where the operation confirmation permission counter is cleared, and then the processing after step 37 is performed to confirm the operation of the variable wing.

The above-described steps 31 to 50 are repeatedly performed. In the present embodiment, the method of starting the check operation from the time when the variable wing reaches the lowest angle position has been described. However, this may be performed at the highest angle position or at any position. it can.

In this embodiment, the function of the swing operation has been described as being switched by operation.
A device that does not have a switching function and operates only with the swing function from the beginning may be used.

Further, the configuration using the limit switch as the reference point detecting means has been described. However, any structure can be used as long as the position can be detected. For example, a switch other than the limit switch, a potentiometer, various lasers, etc. May be used.

[0072]

As described above, according to the first aspect of the present invention,
When the variable wing reaches the highest swing angle or the lowest swing angle, the swing operation check is further driven upward or downward to confirm the upward or downward movement. Therefore, even when the variable wing is operating at an irregular position for some reason, the variable wing is returned to the reference point (operating point of the limit switch) each time the swing operation makes one reciprocation, and the variable wing is returned to the normal position. Correction can be made, and safety can be ensured while satisfying the function of the swing operation.

According to the second aspect of the present invention, by providing a time limit element in the swing operation check, the ON / OFF frequency of the switch can be reduced, and the life of the contact can be extended.

According to the third aspect of the present invention, by providing a frequency limiting element in the swing operation check, the ON / OFF frequency of the switch can be reduced, and the contact life can be extended.

[Brief description of the drawings]

FIG. 1 is a control block diagram of a variable blade drive device of a hot air heater according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the variable blade drive device of the hot air heater.

FIG. 3 is a cross-sectional view of a hot air heater using the variable wing drive device.

FIG. 4 is a detailed view of a main part of a variable wing drive device of the hot air heater.

FIG. 5 is a control block diagram of a variable blade drive device of a hot air heater according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the variable blade drive device of the hot air heater.

FIG. 7 is a control block diagram of a variable blade drive device of a hot air heater according to a third embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the variable blade drive device of the hot air heater.

FIG. 9 is a sectional view of a conventional hot air heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3 Burner (heat generation means) 7 Blower for convection 9 Variable wing 21 Heat generation control part 24 Variable wing drive part 24a Check part 25 Swing instruction means 26 Swing control part 27 Abnormality check timer 28 Operation check permission timer 29 Operation Confirmation permission counter

Claims (3)

[Claims] 1. A main body having a hot air outlet, heat generating means provided in the main body, a blower for supplying air to the heat generating means to blow hot air from the hot air outlet, and Up and down swingable variable wings provided at the exit,
A variable wing drive section for operating the variable wing in the vertical direction, a swing control section for outputting a swing angle to the variable wing drive section, and a variable wing being periodically transmitted from the swing control section to the variable wing drive section. Swing instructing means for instructing the swing control section to output the swing angle, and the swing angle output from the swing control section in response to an instruction from the swing instructing means is the highest swing angle or the highest swing angle. When the lower angle is reached, the variable wing is forcibly driven further upward or downward via the swing control unit, and when the upward or downward movement based on the drive signal is not confirmed, Is a variable blade drive control device for a hot air heater, comprising: a check unit for stopping the heat generating means. 2. The timing of the timer is started when the check section is activated. After the check is completed, the swing angle becomes the highest swing angle or the lowest swing angle until the timer count is completed. 2. The variable airfoil drive control device for a hot air heater according to claim 1, further comprising timer timer means for preventing the check from starting again. 3. A number-of-swings confirming means is provided for preventing a check from starting again unless the number of times the swinging angle reaches the highest swinging angle or the lowest swinging angle does not reach a predetermined number of times. The variable blade drive control device for a hot air heater according to claim 1.