JPH0754203B2 - Hot air heater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to drive control of an opening / closing member provided at an outlet of a warm air heater.

[0002]

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 as a heat generating means in a main body 101 as shown in FIG. The air from the provided blower 103 is mixed and blown out from the warm air outlet 104 to heat the room. And this warm air outlet 1
A large number of horizontal louvers are provided at 04 to guide the warm air in a substantially horizontal direction.

However, the louver 105 provided at the warm air outlet 104 is exposed to the outside during the operation as well as during the operation stop, and it looks bad when the operation is stopped and dust or the like adheres to the louver 105. There was a problem such as getting dirty.

Therefore, in order to solve such a problem, it is considered that an opening / closing member for opening and closing the hot air outlet 104 is provided to open the hot air outlet 104 during operation and to open the warm air outlet when operation is stopped.

[0005]

However, if such an opening / closing body is provided, problems such as appearance and dust adhesion at the time of operation stop can be reduced, but the opening / closing body is opened / closed due to some cause, for example, failure of the driving means of the opening / closing body. There is a problem that if the body does not open during driving, it is in a very dangerous state because it has a heat generating means inside.

The present invention has been made in view of the above points, and aims to improve safety.

[0007]

In order to solve the above problems, a warm air heater according to the present invention is provided with an opening / closing body at a hot air outlet.
The opening / closing body is driven in the vertical direction by the control section, and a check section is provided to stop the operation when the operation of the opening / closing body cannot be confirmed.

[0008]

According to the present invention, the appearance is improved by closing the hot air outlet with the opening / closing body according to the above-mentioned structure, and the operation is stopped immediately if the opening / closing body is not opened for some reason, which is safe.

[0009]

Embodiments of the present invention will be described below with an example in which the blowing direction of warm air is changed by an opening / closing body. In FIG. 1, 1 is a warm air heater body, 2 is a warm air outlet, and 3 is a heat generating means provided in the warm air heater body 1. In this embodiment, a burner for vaporizing and burning kerosene is used. I am using. Reference numeral 4 is a combustion cylinder that covers the upper portion of the burner 3, and reference numeral 5 is a duct provided inside the warm air heater main body 1 so as to cover the combustion cylinder 4, and an opening 6 is formed in the front surface. 7 is this duct 5
With the convection blower installed so as to face the rear part, the room air sucked from the outside of the warm air heater main body 1 is mixed with the combustion gas from the combustion tube 4 in the duct 5 and blown out from the warm air blowout port 2. ing. 8 is an outlet frame provided in the opening of the duct 5, 9 is an opening / closing body provided in the outlet frame 8 so as to be located above the hot air outlet 3, and covers substantially the upper half of the outlet frame 8. Widely formed.
As shown in FIG. 4, this opening / closing body 9 has a shaft 13 projecting from both ends thereof, which is attached to a heater main body side plate 1a (not shown) (which is pierced so as to be rotatable as indicated by an arrow d).
A stepping motor 10 which is connected to 3 and is capable of rotating the opening / closing body 9 up and down is connected. Further, there is a switch lever 11 at one end of the opening / closing body 9, which is fixed to a supporting metal fitting (not shown) attached to the side plate 1a of the apparatus body or comes into contact with the switch button 12a of the mitt switch 12 so that the opening / closing body 9 is vertical. Opening / closing body 9
The limit switch 12 is configured to be operated at a position where it is closed (hereinafter referred to as a reference point).

Reference numeral 20 is a control circuit for controlling the warm air heater,
It is constructed as shown in the block diagram of FIG. That is, reference numeral 21 in FIG. 2 denotes a control unit, which starts combustion control in response to a signal from the operation switch 22, a temperature detection unit 23 including a thermistor, and a room temperature setting unit 2 for setting the room temperature.
The signals from 4 are compared, and the combustion amount is set so that the room temperature becomes the set temperature. Then, according to the setting, the setting signal is sent to the opening / closing body drive control unit 25 in accordance with the control of the burner 3 and the convection blower 7 in accordance with the combustion amount, the warm air amount, or the manual operation. The opening / closing body drive control unit 25 drives the stepping motor 10 so that the opening / closing body 9 moves up and down at an angle predetermined by the setting signal.

Next, the opening / closing body drive control by the combustion control section 21 will be described with reference to the flowchart of FIG. First, when the operation switch 22 is turned on, the microcomputer in the combustion control unit 21 starts to operate, the internal timer for abnormality detection is started, and at the same time, the opening / closing body drive output is sent to the opening / closing body drive control unit 25 to open / close. Drive the body 9. Then, it is checked whether or not the internal timer is up, and if the limit switch 12 is turned on before the time is up, it is confirmed that the opening / closing body 9 has started to rotate from the reference point without any abnormality. . Then, the internal timer is restarted and the opening / closing body drive output is continuously output as it is, and it is checked whether or not the internal timer times out. Before the time expires, the limit switch 12 turns off.
If FF is performed, it is confirmed that the opening / closing body 9 has returned to the reference point without any abnormality. After that, as described above, the combustion amount is set based on the signals from the temperature detection unit 23 and the room temperature setting unit 24 to start combustion, and the opening / closing member drive output corresponding to the combustion amount is output to the opening / closing member drive control unit 25.
To perform a normal operation process of rotating the opening / closing body 9 by a predetermined angle. However, when checking whether or not the internal timer times out, the limit switch 12
If the time elapses before the ON or OFF signal from is input, the open / close body 9 is fixed for some reason and does not rotate, that is, it is determined that there is an abnormality, and the operation stop processing is performed.

Therefore, with the above structure, if the opening / closing body 9 is fixed for some reason and cannot be opened, the opening / closing body 9 does not move even if the stepping motor 10 is driven during the checking operation, so the limit switch is used. 12 does not operate, and even when the stepping motor 10 does not move due to a defect, the limit switch 12 does not operate because the opening / closing body 9 does not move during the checking operation, and it is detected that there is an abnormality. That is, the opening / closing body 9 does not operate, hot air is prevented from being blown out, and the equipment body is not heated or the floor surface is discolored, which is safe. In addition, even if the limit switch 12 itself is defective, when it is OFF, naturally it does not operate during the above check operation, and when it is ON, it is not turned OFF by the second check, so operation is performed in all of the above cases. It is a stop and safe.

In the above embodiment, the operation of checking the opening and closing body is performed based on the operation switch closing signal, but this may be a signal when the power plug of the warm air heater is connected to the outlet, or the combustion start. Alternatively, it may be a rotation start signal of the convection blower or any signal (time). Further, in this embodiment, the limit switch 12
Although the method for checking the reference point has been provided, a method for detecting the presence / absence of an abnormality by providing a rotation angle detection means for the opening / closing body and the like may be used. Any object may be used as long as it achieves the intended purpose.

[0014]

As described above, according to the present invention, since the hot air outlet is closed by the opening / closing body when the operation is stopped, the appearance is improved and dust adhesion can be reduced, and the movement of the opening / closing body itself can be confirmed. Since the operation is stopped when an abnormality is detected, there is no need to operate when the opening / closing body is closed, and the safety of this type of hot air heater with built-in heat generation means is dramatically improved. Can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a warm air heater showing an embodiment of the present invention.

FIG. 2 is a block diagram of the control circuit.

FIG. 3 is the same flowchart

FIG. 4 is a perspective cutaway view of essential parts.

[Fig. 5] An explanatory view of action

FIG. 6 is a sectional view showing a conventional warm air heater.

[Explanation of symbols]

 1 Main Body 2 Hot Air Blowout Port 3 Heat Generation Means (Burner) 7 Convection Blower 9 Opening / Closing Body 12 Limit Switch 21 Control Section

Claims (1)

[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 warm air to the heat generating means to blow out warm air from the hot air outlet. An opening / closing body provided to open / close the hot air outlet, and driving the heat generating means and a convection blower based on an operation start command, and opening / closing the opening / closing body before blowing hot air from the hot air outlet. A warm air heater including a control unit that operates and a check unit that stops the operation when the opening / closing of the opening / closing body is not confirmed.