JPH086919B2 - 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 variable wind direction blades 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 No. 4
As shown in the figure, a burner 102 which is a heat generating means is provided in the main body 101.
Is provided and mixed with the air from the blower 103 provided on the back surface of the combustion gas main body from the burner 102 to heat the inside of the blowout chamber from the warm air blowout port 104. 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 hot air cannot be changed, and during strong heating, during medium heating,
There was a problem in that there was a large difference in the indoor temperature distribution during weak heating. That is, since the air blower 103 during strong heating is strong, warm air is blown out far and the living space normally used by the user (the space other than the top of the room or the corner of the room) has a substantially uniform temperature distribution, but the heating is Medium, weaker and weaker, the amount of air blown from the blower 103 also weakens, so that the draft action of warm air becomes relatively strong and the warm air reach becomes short, and only the vicinity of the heater becomes hot There is a large difference in the indoor temperature distribution between strong, medium, and weak such as unevenness, and the user feels uncomfortable.

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

The problem to be solved by the invention is, however, that in the variable blade system, the variable blade is fixed in a city of weak heating 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, etc. 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 variable blade drive control device for a hot air heater according to the present invention counts a time during which heat generating means is operating, and after a predetermined time, the heat generating control unit. First timer means for stopping the operation of the heat generating means via
A timer initialization means capable of arbitrarily initializing the first timer means, and forcibly driving the wind direction variable blade up and down through the variable blade drive controller based on a signal from the timer initialization means. A check means for stopping the heat generation control unit is provided when vertical movement based on the signal is not confirmed.

Effect Since the present invention is configured to check the operation of the variable blade with the above-described configuration, the variable blade does not continue to operate while being abnormal, so that comfortable and safe warm air heating can be obtained. Become.

Example Hereinafter, an example of the present invention will be described with reference to the drawings.
In FIG. 3, 1 is a heater body, 2 is a hot air outlet, and 3 is a heat generating means (hereinafter referred to as a burner) provided in the heater body. In this embodiment, kerosene is vaporized and burned. It uses a vaporization type burner. Reference numeral 4 is a combustion cylinder that covers the upper portion of the burner 3, and 5 is a duct that is provided inside the heater body 1 so as to cover the combustion cylinder, and has an opening 6 formed in the front surface. Reference numeral 7 denotes a convection blower mounted so as to face the rear 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 the warm air. It is designed to blow out from 2. Reference numeral 8 denotes an outlet frame provided in the opening 6 of the duct 5, 9 denotes a wind direction variable blade (hereinafter referred to as variable blade) provided in the outlet frame 8 so as to be located above the warm air outlet 3.
Then, it is formed wide so as to cover substantially the upper half of the outlet frame 8. As shown in FIG. 2, 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 main body of the heating machine so as to be rotatable as indicated by an arrow d. A stepping motor 10 capable of forward and reverse rotation is connected to drive the variable vane 9 up and down. Further, there is a switch lever 11 at one end of the variable wing 9, which comes into contact with a switch button 12a of a limit switching 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 a 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. That is,
Reference numeral 21 denotes a heat generation control unit (hereinafter referred to as a combustion control unit), which compares a signal from a temperature detection unit 22 including a thermistor and a room temperature setting unit 23 that sets the room temperature, and according to the difference, the burner 3 The combustion amount and the air flow amount of the convection blower 7 are controlled so that the room temperature becomes the temperature set by the room temperature setting unit 23, and in conjunction with this, the variable blade drive control unit 24 also outputs the temperature. There is. The variable blade drive control unit 24 drives the stepping motor 10 so as to make a predetermined angle based on the control signal, and moves the variable blade 9 up and down. Further, the combustion control unit 21 includes the burner 3 and the convection blower 7.
At the same time as outputting a signal for combustion and air blowing, the first timer 25, which measures the combustion time, is activated. This first
When the timer 25 counts up, it sends a combustion stop signal to the combustion control unit 21 to stop combustion. Reference numeral 26 denotes a combustion continuation switch as a timer initialization means for initializing the first timer 25, and the signal of the combustion continuation switch 26 initializes the first timer 25 to continue combustion. Further, the signal of the combustion continuation switch 26 activates the second timer 27 set at an appropriate time and outputs a signal to the variable blade drive control unit 24 so that the variable blade 9 checks the position of the reference point. The checking means 24a includes a variable blade drive controller 24 and a second
Consists of a timer 27. The variable blade drive control unit 24 receiving the check signal drives the stepping motor 10, and when the position of the variable blade 9 reaches the reference point, the switch lever 11 shown in FIG. 2 pushes the switch button 12a of the limit switch 12. The variable blade drive control unit 24 is stopped by the signal S12 from the limit switch 12. Here, if the signal S12 from the limit switch 12 is not output even when the second timer 27 counts up, the variable blade 9
If the check means 24a determines that there is a failure, the second timer 27 outputs a combustion stop signal S27 to the combustion control unit 21 to stop the combustion. When the signal S12 from the limit switch 12 is output to the variable blade drive control unit 24 before the second timer 27 counts up, the variable blade 9 is judged to be normal by the checking means 24a, and the driving operation is performed. continue. Then, the combustion control unit 21 enters this continuous operation, receives the signals from the temperature detection unit 22 and the room temperature setting unit 23, and adjusts the angle of the variable blade 9 that matches the combustion amount determined by the combustion control unit 21 (determined from the reference point). Controlled to become.

It is assumed that combustion is performed at a certain combustion level in the above configuration. Then, the angle of the variable blade 9 is controlled by the combustion control unit 21 and the variable blade drive control unit 24 so as to match the combustion level,
The first timer 25, which measures the combustion time, is also starting up. In the case of such combustion, when the combustion continuation switch 26 is pushed to continue combustion, the first timer 25 is initialized and restarted, and the variable blade drive control unit 24 checks the reference point of the variable blade 9. In order to do so, the control signal is output and the second timer 27 is started at the same time. Variable blade drive controller 24, limit switch 12, stepping motor
When 10 is normal, the switch lever 11 attached to one end of the variable blade 9 pushes the switch button 12a of the limit switch 12 before the second timer 27 counts up, turning on the limit switch 12 and turning on the second timer. When 27 is stopped, the second timer 27 outputs a signal S27 'indicating that the reference point has been accurately set to the combustion control unit 21,
The variable blade drive control unit 24 outputs a signal to the stepping motor 10 in order to return the variable blade angle to the current combustion amount again.

Next, if the variable wing 9 fails, the second timer
Since the limit switch 12 does not operate even when 27 counts up, the second timer 27 outputs a combustion stop signal S27 to the combustion control unit 21 to stop combustion.

Therefore, when the variable blade 9 is burning at an irregular position for some reason, the variable blade 9 is corrected to the normal position during the check operation, and when the variable blade 9 is fixed for some reason, the check operation is performed. Sometimes, even if the stepping motor 10 is driven, the variable blade 9 does not move, so the limit switch 12 does not operate. Even if the stepping motor 10 does not move due to a defect, the variable blade 9 does not move during the above check operation, so the limit Switch 12 does not work. Further, if the limit switch itself is defective, it does not operate during the above-described check operation, so that the operation is stopped.

In the embodiment of the present invention, the limit switch 12 is installed so that the position where the warm air outlet 2 is closed by the variable blade 9 becomes the reference point of the angular position of the variable blade 9. The position may be.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to correct the variable blade in any case such as when the variable blade does not operate during combustion or when the vertical position of the variable blade becomes irregular. If it cannot be corrected, the 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 variable airflow direction blade control device, FIG. 2 is a perspective view of a drive unit of the variable airflow direction blade, FIG. 3 is a cross-sectional view of a warm air heater implementing the device, and FIG. It is sectional drawing of the warm air heater of FIG. 1 ... Main body, 3 ... Heat generating means, 7 ... Convection blower,
9 ... Wind direction variable blade, 21 ... Combustion control section, 24 ... Variable blade drive control section, 24a ... Checking means, 25 ... First timer means, 26 ... Timer initialization 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. The heat generation control unit that controls one or both of the amount of heat generated by the heat generation control unit and the heat generation control unit that controls the variable blade drive control unit in conjunction with this change is counted for a predetermined time. First timer means for stopping the operation of the heat generating means via the heat generation control section after a lapse of time, timer initialization means for arbitrarily initializing the first timer means, and this timer initialization means Checking means for forcibly driving the wind direction variable blade in the vertical direction via the variable blade drive control section based on a signal, and stopping the heat generation control section if vertical movement based on the signal is not confirmed. And a variable wind direction blade control device for a warm air heater. 2. When the checking means is activated and the wind direction variable blade is forcibly driven in the vertical direction, and when vertical movement based on the drive signal is confirmed, the warm air volume or heat generating means is generated again. A heat generation control unit for controlling the wind direction variable blade so as to return to the wind direction variable blade angle determined by one or both of the heat amounts.
A variable wind direction blade drive control device for a warm air heater according to the above item.