JPH0756414B2 - Wind direction variable blade drive controller for warm air heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for a wind direction variable blade provided at an outlet of a warm air heater.

2. Description of the Related Art Generally, a hot air heater of this type, for example, a fan heater, is provided with a burner 102 which is a heat generating means in a main body 101 and a combustion gas from the burner 102 is provided on the rear surface of the main body as shown in FIG. Hot air outlet 1 mixed with the air from the blower 103
It blows out from 04 to heat the room. A large number of fixed horizontal louvers 105 are provided in the warm air outlet 104 to guide the warm air in a substantially horizontal direction.

However, since the louver 105 provided in the hot air outlet 104 is fixed to the main body, the direction of the hot air cannot be changed, and the temperature distribution in the room during strong heating, medium heating, and weak heating There was a problem that a big difference occurs. That is, during strong heating, the air blown from the blower 103 is strong, so warm air is blown out to a long distance, and the living space normally used by the user (space other than the top of the room or the corners of the room) has a substantially uniform temperature distribution. However, the amount of air blown from the blower 103 also becomes weaker as it becomes weaker and weaker, so that the draft action of warm air becomes relatively strong and the arrival distance of warm air becomes short, and only the vicinity of the heater becomes hot. There is a large difference in the room temperature distribution between strong, medium, and weak such as uneven temperature distribution, and the user feels uncomfortable.

Therefore, the inventor of the present invention considered rotating the louver (hereinafter, referred to as a variable blade) in the vertical direction according to the amount of combustion or the amount of warm air. According to this variable wing type, strong, medium,
Since the blowing direction of warm air changes depending on the weakness, the temperature distribution in the room is better than that of the conventional one, and a comfortable heating effect can be obtained accordingly.

The problem to be solved by the invention, however, is that the variable blade system is fixed in a weak heating position due to mischief of a child during strong heating, or from weak heating to strong heating. If the variable blades do not switch to the strong heating position for some reason despite the change to, the blowing of hot air is blocked and the equipment body heats up or the floor surface discolors. Therefore, it was necessary to ensure safety.

The present invention solves the above-described conventional problems, and an object thereof is to ensure comfortable heating and at the same time ensure safety.

Means for Solving the Problems In order to solve the above problems, a wind direction variable blade drive control device for a hot air heater according to the present invention includes a first timer means for counting time by a signal from a heat generating means, and a first timer means. Each time the timer means counts up, the variable-blade drive control unit is forcibly driven in the vertical direction to move the variable-direction vane,
Checking means for stopping the heat generation control unit is provided when vertical movement based on the signal is not confirmed.

Effect According to the present invention, since the operation of the variable blade is checked at regular intervals by the above-described configuration, the variable blade does not continue to be operated abnormally, so that comfortable and safe warm air heating can be obtained. Become.

EXAMPLE An example of the present invention will be described below with reference to the drawings. In FIG. 4, 1 is a heater body, 2 is a hot air outlet,
Reference numeral 3 denotes a heat generating means (hereinafter referred to as a burner) provided in the heater body, and in this embodiment, a vaporization burner for vaporizing and burning kerosene is used. 4 is burner 3
Is a duct provided inside the heater main body 1 so as to cover the combustion cylinder 4, and an opening 6 is formed in the front surface. Reference numeral 7 denotes a convection blower mounted so as to face the rear part of the duct 5, and supplies the indoor air sucked from the outside of the heater main body 1 into the duct 5 and mixes it with the combustion gas from the combustion cylinder 4 to blow out hot air. It is designed to blow out from 2.
8 is an outlet frame provided in the opening 6 of the duct 5, 9
Is a wind direction variable vane (hereinafter referred to as a variable vane) provided in the blowout port frame 8 so as to be located above the warm air blowout port 3, and is widely formed so as to cover substantially the upper half of the blowout port frame 8. As shown in FIG. 3, the variable blade 9 has shafts 13 projecting from both ends thereof which are passed through metal fittings (not shown) attached to the side plate 1a of the heater body so as to be rotatable as indicated by an arrow d.
It is driven by a forward / reverse stepping motor 10 connected to. Further, there is a switch lever 11 at one end of the movable wing 9, which comes into contact with a switch button 12a of a limit switch 12 fixed to a support metal fitting (not shown) attached to the side plate 1a of the main body of the device, so that the variable wing 9 is vertical. The limit switch 12 is configured to operate at the time, that is, at a position where the warm air outlet 2 is closed by the variable blade 9 (hereinafter referred to as a reference point).

Reference numeral 20 is a control unit for controlling the warm air heater, which is configured as shown in the block diagram of FIG. Ie 21
Is a heat generation control unit (hereinafter referred to as a combustion control unit), compares the signal S22 from the temperature detection unit 22 including a thermistor and the signal S23 from the room temperature setting unit 23 that sets the room temperature,
Depending on the difference, the burner 3 combustion signal and the signal by the signal S21a
The air flow rate of the convection blower 7 is controlled by S21b so that the room temperature becomes the temperature set by the room temperature setting unit 23, and
The variable blade drive control unit 24 also outputs the signal S21c. The variable blade drive control unit 24 drives the stepping motor 10 by the signal S24 based on the signal S21c, and operates the variable blade 9 up and down.

A check unit 24a is provided in the control unit 20 and includes a first timer 25, a variable blade drive control unit 24, and a second timer 27. The first timer 25 is activated by the signal S21d from the combustion control unit 21. The first timer 25 is set to, for example, about 30 minutes, and when the first timer unit counts up, the signal S25a is output to the combustion control unit 21, and the signal S25b is sufficiently smaller than the first timer. For example, it is also output to the second timer 27 set to about 10 seconds. The combustion control unit 21 receives the signal S25a and receives the signal S21d.
Thus, the first timer 25 is restarted, and the signal S21c is sent to the variable blade drive control unit 24. The signal S24 from the variable blade drive control unit 24 drives the stepping motor 10 to move the variable blade 9 up and down. The vertical movement of the variable blade 9 is detected by the limit switch 12, and the limit switch 12
The detection signal S12 from is sent to the second timer 27. The second timer 27 is activated by the signal S25b from the first timer 25 and stopped by the signal S12 from the limit switch 12. Also limit switch 12
The signal S12 from the above enters the combustion control unit 21 and controls the variable blade 9 to return to the normal position.

The operation of the above configuration will be described below with reference to the flowchart of FIG.

A check routine for controlling the check unit is provided at an arbitrary place in the main routine. When combustion starts and the check routine is activated, the first timer is initialized and activated at step 31. Next, at step 32, the room temperature data and the set temperature data from the temperature detection unit 22 and the room temperature setting unit 23 are input and compared, and the combustion amount is determined according to the difference between them, and the burner 3 and the convection blower are also determined according to the combustion amount. 7 and the variable blade 9 are controlled. In step 33, if the first timer started in step 31 is not counted up, the process returns to step 32 and normal combustion control is performed. Next, if the first timer is counted up, step 34
Initializes the second timer and activates it. Next, in step 35, the variable blade drive control unit 24 is caused to output a signal S21c for checking the variable blade 9, and the variable blade drive control unit 24
Outputs a variable blade drive signal S24 from the stepping motor 10 to control the variable blade to return to the reference point. Step
At 36, it is confirmed whether the variable blade 9 has reached the reference point by the above driving. In this embodiment, it is configured to confirm whether or not the lever 11 attached to a part of the variable wind direction blade 9 has pressed the switch button 12a of the limit switch 12. If there is no signal from the limit switch 12, it is determined in step 37 whether or not the second timer has counted up, and if not, a signal to move the variable blade 9 continuously to step 35. Will continue to be output. On the other hand, if the second timer 27 is counting up, it is determined that the variable blade 9 does not operate normally, and the combustion is stopped in step 38. Then in step 36 the limit switch 12
If the signal from is confirmed, the variable blade 9 is considered to be normal and the process returns to the main routine.

Therefore, if the variable blade 9 is burning at an irregular position due to some cause during normal combustion, the variable blade 9 is returned to the reference point every time the first timer counts up, and the variable blade 9 is returned to the regular position. Fix it. Next, if the variable blade 9 is fixed due to some cause, the limit switch 12 does not operate until the second timer counts up even if the stepping motor 10 is driven during the above check operation, so the variable blade 9 is abnormal. If it is, stop burning. In addition, even if the stepping motor 10 does not move due to a defect, the variable blade 9 also does not move, so the limit switch does not operate. When the limit switch itself is defective, it does not operate even during the above-described check operation, so the operation is stopped.

In the present embodiment, the limit switch 12 is installed so that the position where the warm air outlet 2 is closed by the variable blade 9 is the reference point of the angle of the variable blade 9, but it is the open position. May be.

EFFECTS OF THE INVENTION As described above, according to the present invention, in any case, such as when the variable vane does not operate during combustion or the vertical position of the variable vane becomes irregular, the variable vane is set to the regular position at regular time intervals. It can be corrected, and if it cannot be corrected, combustion can be stopped, and a safe and comfortable hot air heater can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a wind direction variable blade drive control device, FIG. 2 is a flowchart for explaining FIG. 1, FIG. 3 is an explanatory view showing a drive unit of the wind direction variable blade, and FIG. 4 is the same device. FIG. 5 is a cross-sectional view of the warm air heater in which the above is performed, and FIG. 1 ... Main body, 3 ... Heat generating means, 7 ... Convection blower,
9 ... Wind direction variable blade, 21 ... Heat generation control section, 24 ... Variable blade drive control section, 24a ... Checking means, 25 ... First timer means.

Claims (2)

[Claims] 1. A main body having a hot air outlet, a heat generating means provided in the main body, and a convection blower for supplying air to the heat generating means to blow out warm air from the hot air outlet. A variable airflow direction vane disposed in the hot air blowout port and capable of swinging up and down, a variable vane drive control unit for rotating the variable airflow direction vane in the vertical direction, a hot air flow rate from the hot air blowout port, or the heat generating means. A heat generation control unit that controls one or both of the amounts of heat generated by the heat generation control unit and controls the variable blade drive control unit in conjunction with this change; and a first timer unit activated by the heat generation control unit. The wind direction variable blade is forcibly driven in the vertical direction through the variable blade drive control section based on the signal from the first timer section, and when the vertical movement based on the signal is not confirmed, the heat generation control is performed. Wind direction variable vane driving control apparatus parts comprising a checking unit for stopping the hot air heater. 2. When the checking unit is activated and the wind direction variable vanes are forcibly driven in the vertical direction, and when the vertical movement of the wind direction variable vanes is confirmed based on the drive signal, the amount of warm air or heat is generated again. The wind direction of the warm air heater according to claim 1, further comprising a heat generation control unit that controls the variable wind direction blade so that the variable wind direction blade is returned to the variable wind direction blade angle determined by one or both of the amounts of heat generated by the section. Variable wing drive controller.