JPH01310263A - Warm-air space heater - Google Patents

Abstract

PURPOSE:To stop operation immediately when a variable blade has become not movable and improve safety by a method wherein a checking unit stopping the operation when the up-and-down motion of the variable blade is not confirmed is provided in the title heater. CONSTITUTION:When an operating switch 22 is put ON, a microcomputer in a combustion control unit 21 starts the operation, an internal timer for detecting abnormality is started and a variable blade driving output is sent to a variable blade driving control unit 25 to drive the variable blade. The internal timer is checked whether it effects time-up or not and when a limit switch 12 is put ON until the time of time-up, it is confirmed that the variable blade 9 has started to pivot from a reference point without any abnormality. When the variable blade 9 is fixed due to some cause, the variable blade 9 is not moved even when a stepping motor 10 is driven upon the checking operation and, therefore, the limit switch 12 is not operated. When the stepping motor 10 is not moved due to a fault, the variable blade 9 is not moved upon the checking operation and, therefore, the limit switch 12 is not operated and the abnormality is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drive control device for variable wind direction blades provided at the outlet of a hot air heater.

Conventional technology Generally speaking, this type of hot air heater, such as a fan heater,
As shown in FIG. 6, a burner 102 as a heat generating means is provided in the main body 101, and combustion gas from the burner 102 is mixed with air from a blower 103 provided on the back of the main body and blown out from a hot air outlet 104. , to heat the room. The warm air outlet 104 is provided with a large number of horizontal louvers to guide the warm air in a substantially horizontal direction.

However, since the looper 105 provided at the hot air outlet 104 is fixed to the main body, the direction of hot air blowing cannot be changed, and the temperature distribution in the room during strong heating, medium heating, and weak heating. The problem was that there were large differences between the two.

In other words, during strong heating, the air blowing from the blower 103 is so strong that hot air is blown out far away, and the living space (
The temperature distribution is almost uniform throughout the room (excluding the ceiling and corners of the room). However, as the heating becomes weak from medium to low, the amount of air blown from the blower 103 also becomes weak (as a result, the draft effect of the hot air becomes relatively strong, and the distance that the hot air reaches is shortened, and only the area near the heater There was a large difference in the indoor temperature distribution between high, medium, and low, such as uneven temperature distribution where the room became hot, resulting in discomfort for the user.

Therefore, we devised a system in which the louver is rotated vertically depending on the amount of combustion or hot air. According to this variable blade system, as shown in Figure 5, the blowing direction of hot air is X or Y depending on whether it is strong, medium or weak.

Since it is different from Z, the temperature distribution in the room is better than the conventional one, and the heating effect is more comfortable.

Problems to be Solved by the Invention However, with variable blade systems like this, for example, when the variable blades are fixed due to an obstacle in front of them while stopped, or due to a failure of the drive unit, etc. If the blades do not work, the hot air outlet may be blocked, causing the equipment to heat up or the floor surface to discolor.
Measures were needed to ensure safety.

The present invention solves this problem, and aims to provide comfortable heating and ensure safety at the same time.

Means for Solving the Problems In order to solve the above problems, the hot air heater of the present invention is provided with a variable vane at the hot air outlet, and the variable vane is driven in the vertical direction by a control unit, and the operation of the variable vane is The structure includes a check section that checks the operation and stops the operation if the operation cannot be confirmed.

Effect of the Invention With the above configuration, the present invention can move the variable blades up and down to reduce temperature unevenness in the room and provide comfortable heating, and if the variable blades do not operate normally for some reason, they can be turned on immediately. It is safe because it stops.

Embodiment Hereinafter, embodiments of the present invention will be explained based on the drawings. In FIG. This is a generating means, and in this embodiment, a burner that vaporizes and burns kerosene is used. 4 is a combustion tube that covers the upper part of the burner 3; 5 is a duct provided in the warm air heater body 1 so as to cover the combustion tube 4;
An opening 6 is formed on the front surface. 7 is a convection blower installed facing the rear of this duct 5, which draws indoor air from outside the warm air heater body 1 into the combustion tube 4 within the duct 5.
The heated air is mixed with combustion gas from the hot air outlet 2 and blown out from the hot air outlet 2. Reference numeral 8 denotes an outlet frame provided at the opening of the duct 5, and 9 denotes a variable blade provided on the outlet frame 8 so as to be located above the hot air outlet 3, so as to cover half of the air outlet frame 8 on the road. It has a wide range of shapes. As shown in FIG. 4, this variable blade 9 has a shaft 1 protruding from both ends
3 attached to the side plate 1a of the heater body (not shown)
A stepping motor 10 that is connected to a shaft 13 and capable of forward and reverse rotation is connected to the shaft 13 to drive the variable blade 9 up and down. Further, there is a switch lever 11 at one end of the variable blade 9, and a switch button for a limit switch 12 fixed to a support fitting (not shown) attached to the side plate 1a of the main body of the device. 2a, and the limit switch 12 is configured to operate when the variable blade 9 is vertical, that is, in a position where the air outlet is closed by the variable blade 9 (hereinafter referred to as a reference point).

Reference numeral 20 denotes a control circuit for controlling the warm air heater, and is configured as shown in the block diagram of FIG. In other words, numeral 21 in FIG. 2 is a control unit that starts combustion control in response to a signal from an operation switch 22, and a temperature detection unit 2 consisting of a thermistor or the like.
3. Then, the combustion amount is set so that the room temperature becomes the set temperature by comparing the signal from the room temperature setting section 24 that sets the room temperature. Then, depending on the settings, a setting signal is sent to the variable blade drive control section 25 in conjunction with the control of the burner 3 and convection blower 7 in accordance with the combustion amount, hot air amount, or manual operation. The variable blade drive control unit 25 drives the stepping motor 10 to move the variable blade 9 up and down so that the angle is predetermined based on the setting signal.

Next, variable blade drive control by the combustion control section 21 will be explained using the flowchart shown in FIG.

First, when the operation switch 22 is turned on, the microcomputer in the combustion control section 21 starts operating, an internal timer for abnormality detection starts, and variable blade drive output is sent to the variable blade drive control section 25, causing the Drive the wings. Then, it is checked whether the internal timer times up or not, and if the limit switch 12 is turned on before the time amplifies, it is confirmed that the variable blade 9 has started rotating from the reference point without any abnormality. Then, start the internal timer again and continue outputting the variable blade drive output, check whether or not the internal timer time-amps up, and limit switch 12 turns OFF by the time the internal timer times up.
If it is F, it is confirmed that the variable blade 9 has returned to the reference point without any abnormality. Thereafter, as described above, the combustion amount is set based on the signals from the temperature detection section 23 and the room temperature setting section 24 to start combustion, and the variable blade drive output corresponding to the combustion amount is sent to the variable blade drive control section 25. A normal operation process is performed in which the variable blade 9 is rotated by a predetermined angle. However, when checking whether or not the internal timer clocks up, if the time-up occurs before the ON or OFF signal from the limit switch 12 is input, the variable blade 18 is fixed for some reason and does not rotate, that is, it is abnormal. It is determined that there is a problem and the operation is stopped.

Therefore, with the above configuration, if the variable blade 8 is fixed for some reason, even if the stepping motor 10 is driven during the check operation, the variable blade 9 will not move and the limit switch 12 will not operate. Even if the stepping motor 10 is defective and does not move, the variable blade 9 does not move during the above-mentioned check operation, so the limit switch 12 does not operate, and an abnormality is detected. In other words, it is safe because the variable blades 9 do not operate and the blowing of hot air is obstructed, causing the main body of the device to heat up and the floor surface to discolor. Also, if the limit switch 12 itself is defective, if it is OFF, it will not operate during the above check operation, and if it is ON, it will not operate during the second check.
Since it is not turned off, operation is stopped even in all of the above cases, making it safe.

In the above embodiment, the variable blade check operation was performed based on the 1st turn switch ON signal, but this could also be a signal when the hot air heater's power plug is connected to an outlet, or when combustion starts or It may be a rotation start signal of a convection blower, or it may be any signal (time point). Further, in this embodiment, a limit switch 12 is provided to check the reference point, but a method is also available in which a rotation angle detection means of the variable blade is provided and the presence or absence of an abnormality is detected by the output from this rotation angle detection means. Any detection method may be used as long as it achieves the intended purpose.

Effects of the Invention As described above, according to the present invention, the variable blades of the hot air outlet can be rotated depending on the amount of hot air, heat amount, or manual operation to make the temperature distribution in the room more uniform, thereby providing comfortable heating. I can do it. Further, the operation of the variable blade is checked, and if the variable blade stops operating for some reason, the operation is immediately stopped, so it is safe.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hot air heater showing an embodiment of the present invention;
Fig. 2 is a block diagram of the control circuit, Fig. 3 is a flowchart, Fig. 4 is a cutaway perspective view of the main parts, Fig. 5 is an explanatory diagram of the operation, and Fig. 6 shows a conventional hot air heater. FIG. 1... Body, 2... Warm air outlet,
3...Heat generation means (burner), 7...
Convection blower, 9...Variable blades, 12...
・Limit switch, 21...Control unit. Name of agent: Patent attorney Toshio Nakao 1 person 1 - principal? -Enjoyable blowing! ! Tashiguchi 3- Burna (means of waste production) 7- Izun M 迭a Lu? - Possible fvl Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) A main body having a hot air outlet, a heat generating means provided in the main body, a convection blower that supplies air to the heat generating means and blows out hot air from the warm air outlet, a variable wind direction vane disposed at the wind outlet, the variable wind direction wing being pivotally supported to be vertically swingable, and one of an amount of hot air from the hot air outlet and an amount of heat generated by the heat generating means; or a control unit that changes both and rotates the variable wind direction blade in the vertical direction in conjunction with this change or by manual operation, and drives the variable blade in the vertical direction, and the vertical movement is not confirmed. A hot air heater consisting of a check section that stops operation if the case occurs.