JPH01310227A - Wind direction varying blade drive control device for hot air heater - Google Patents

Abstract

PURPOSE:To provide a safe and comfortable hot air heater by a method wherein when a variable blade is not motioned due to some cause during combustion or the variable blade is situated in an irregular vertical position, the variable blade is corrected to a regular position, and when correction is impracticable, combustion is stopped. CONSTITUTION:When the variable blade 9 is failed in operation, since a limit switch 12 is not actuated even when a second timer 27 counts up, a combustion stop signal S27 is outputted to a combustion control part 21 to stop combustion. Thus, when combustion is effected in the irregular position of the variable blade 9 due to some cause, during a check motion, the variable blade is corrected to a regular position. When the moving blade 9 is fixed due to some cause, even when, during a check motion, a stepping motor 10 is run, and the variable blade 9 is not moved, whereby the limit switch 12 is not actuated. When the limit switch itself is defective, since during a check motion, it is naturally not motioned, all operation is stopped.

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.

BACKGROUND TECHNOLOGY In general, this kind of hot air heater), for example, a fan heater, is equipped with a burner 102 as a heat generating means in a main body 101 as shown in FIG. The heated air is mixed with the air from the blower 103 and is blown out from the hot air outlet 104 to heat the room. The hot air outlet 104 is provided with a large number of fixed horizontal loopers 105 to guide the hot 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 from the blower 103 is strong, so hot air is blown far away, resulting in a nearly uniform temperature distribution in the living space normally used by the user (excluding the ceiling and corners of the room). The blower 103 becomes weaker from medium to weak.
The amount of air blown from the heater also becomes weaker, and as a result, the draft effect of the hot air becomes relatively stronger, which shortens the distance that the hot air reaches and causes uneven temperature distribution where only the area near the heater gets hot.
There was a large difference in the indoor temperature distribution between high, medium, and low, resulting in discomfort for the user.

Therefore, the inventor of the present invention has devised a system in which the looper (hereinafter referred to as a blade) is rotated one turn in the vertical direction depending on the amount of combustion or hot air. With this variable blade type, the direction of hot air blowing changes depending on whether it is strong, medium, or weak, so the temperature distribution inside the room is better than with conventional types, and a more comfortable heating effect can be obtained. Ta.

Problems to be Solved by the Invention However, with the variable blade system, for example, the variable blades may become fixed at the low heating position due to a child's mischief during high heating, or the variable blade may change from low heating to high heating. If, for some reason, the variable blades do not switch to the strong heating position even though the temperature has changed, the blowing of hot air may be blocked, causing the equipment itself to heat up, the floor surface to discolor, etc. There was a need to ensure safety.

The present invention is intended to solve these conventional problems, 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 variable blade drive control device for a hot air heater of the present invention counts the time during which the heat generation means is operating, and after a predetermined time, the heat generation control section a first timer means for stopping the operation of the heat generating means via the first timer means, a timer initialization means for arbitrarily initializing the first timer means, and a timer initialization means for forcibly initializing the first timer means based on a signal from the timer initialization means. A check means is provided which drives the variable wind direction blade in the vertical direction via the blade drive control unit and stops the heat generation control unit if vertical movement based on the signal is not confirmed.

Function The present invention uses the above-mentioned configuration to check the operation of the variable blade, so that the variable blade does not continue to operate with an abnormal condition, so that comfortable and safe hot air heating can be obtained. become.

Embodiment Hereinafter, embodiments of the present invention will be described based on the drawings. In FIG. 3, 1 is a heater main 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 vaporizing burner is used that vaporizes and burns kerosene. 4 is burner 3
A combustion tube 5 covering the upper part of the combustion tube is a duct provided in the heater body 1 so as to cover the combustion tube, and an opening 6 is formed in the front surface.

7 is a convection blower installed facing the rear of this duct 5, which supplies indoor air sucked in from outside the heater body 1 into the duct 5, mixes it with combustion gas from the combustion tube 4, and blows hot air into the air outlet. It is designed to blow out more than 2. Reference numeral 8 denotes an outlet frame provided at the opening 6 of the duct 5, and 9 indicates a variable wind direction blade (hereinafter referred to as variable blade) provided on the outlet frame 8 so as to be located above the hot air outlet 3. It is formed widely so as to cover the road half of the mouth frame 8.

As shown in FIG. 2, this variable blade 9 is rotatable as shown by arrow d by passing a shaft 13 protruding from both ends thereof through a metal fitting (not shown) attached to the side plate 1a of the heater main body.
A stepping motor 10 capable of forward and reverse rotation is connected to the motor 3 to drive the variable blade 9 up and down. Further, there is a switch lever 11 at one end of the variable blade 9, which contacts a switch button 12a of a limit switch 12 fixed to a support fitting (not shown) attached to the side plate 1a of the main body of the device, so that the variable blade 9 is vertically The limit switch 12 is configured to operate when the hot air outlet 2 is at a position where the variable blade 9 is closed (hereinafter referred to as a reference point).

Reference numeral 20 denotes a control section for controlling the hot air heater, and this is configured as shown in the block diagram of FIG.

That is, 21 is a heat generation control section (hereinafter referred to as combustion control section) which compares signals from a temperature detection section 22 consisting of a thermistor etc. and a room temperature setting section 23 for setting the room temperature, and controls the burner according to the difference. 3 and the air flow rate of the convection blower 7 so that the room temperature reaches the temperature set by the room temperature setting section 23, and in conjunction with this, output is also output to the variable blade drive control section 24. It has become. The variable blade drive control section 24 drives the stepping motor 10 to make a predetermined angle based on the control signal, and moves the variable blade 9 up and down. The combustion control unit 21 also outputs signals for combustion and blowing air to the burner 3 and the convection blower 7, and at the same time outputs a first timer 25 that measures the combustion time.
Activate.

When the first timer 25 counts up, it sends a combustion stop signal to the combustion control section 21 to stop combustion. 2
Reference numeral 6 denotes a combustion continuation switch as timer initialization means for initializing the first timer 25;
The first timer 25 is initialized by the signal No. 6, and combustion continues. Further, the signal from the combustion continuation switch 26 starts a second timer 27 set at an appropriate time and outputs a signal to the variable blade drive control section 24 to check the position of the variable blade 9 at the reference point. The checking means 24m
is composed of a variable blade drive control section 24 and a second timer 27. The variable blade drive control unit 24 that receives 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. A signal 912 from this limit switch 12 causes the variable blade drive control section 24 to stop. Here, the signal S12 from the limit switch 12 is transmitted to the second timer 27.
If it is not output even after counting up, the checking means 24a determines that the variable blade 9 is malfunctioning, and the second timer 27 sends a combustion stop signal 827 to the combustion control unit 21.
is output and combustion stops. Before the second timer 27 counts up, the signal 9 from the limit switch 12
12 is output to the variable blade drive control section 24, the checking means 24m determines that the variable blade 9 is normal and continues the operation. Then, the combustion control section 21 enters this continuous operation and receives the signals from the temperature detection section 22 and the room temperature setting section 23, and the angle of the variable blade 9 (determined from the reference point) matches the combustion amount determined by the combustion control section 21. controlled to become

Assume that the above configuration is burning at a certain combustion level. The angle of the variable vane 9 is controlled by a combustion control section 21 and a variable vane drive control section 24 to match the combustion level, and a first timer 25 that measures the combustion time is also activated. In such a case, when the combustion continuation switch 26 is pressed to continue combustion, the first timer 2
5 is initialized and restarted, and simultaneously outputs a control signal to the variable blade drive control section 24 to check the reference point of the variable blade 9, and starts the second timer 27. Here, if the variable blade drive control section 24, limit switch 12, and stepping motor 10 are normal, the switch lever 11 attached to one end of the variable blade 9 will switch to the limit switch 12 before the second timer 27 counts up. The switch button 12a is pressed, the limit switch 12 is turned ON, the second timer 27 is stopped, and the second timer 27 outputs a signal S27' indicating that the reference point has been accurately reached to the combustion control section 21. In order to return to the variable blade angle that matches the current combustion amount, the variable blade drive control unit 2
4 outputs a signal to the stepping motor 1o.

Next, if the variable blade 9 is out of order, the second timer 2
7 counts up, the limit switch 12 does not operate, so a combustion stop signal S27 is sent from the second timer 27.
is output to the combustion control section 21, and combustion is stopped.

Therefore, if the variable blade 9 is burning at an irregular position for some reason, it will be corrected to the normal position during the above check operation, and if the variable blade 9 is fixed for some reason, the above check operation will be performed. Sometimes, even if the stepping motor 1o is driven, the variable blades 9 do not move, so the limit switch 12 does not operate.If the stepping motor 1o is defective and does not move, the variable blades 9 do not move during the above check operation, so the limit switch 12 does not operate. Switch 12 is inoperative. Furthermore, if the limit switch itself is defective, it will naturally not operate during the above-mentioned check operation, and all operations will be stopped.

In the embodiment of the present invention, the limit switch 12 is installed so that the position where the hot air outlet 2 is closed by the variable blades 9 is the reference point for the angular position of the variable blades 9. It may be in a position where

Effects of the Invention As described above, according to the present invention, even if the variable blade stops operating for some reason during combustion, or if the vertical position of the variable blade becomes irregular, it is possible to correct it to the normal position. If correction is not possible, combustion can be stopped, and a safe and comfortable warm air heater can be obtained.

[Brief explanation of the drawing]

FIG. 4 is a sectional view of a conventional hot air heater. 1...Main body, 3...Heat generation means, 7.
...Convection blower, 9...Variable wind direction blade,
21... Combustion control section, 24... Variable blade drive control section, 24-- Mountain... Checking means, 25...
. . . first timer means, 26 . . . timer initialization means. Name of agent: Patent attorney Toshi Nakao (1 person: 10)
/z Figure 2 Figure 3? A Figure 4

Claims (2)

[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 warm air from the warm air outlet; A variable wind direction blade disposed at the hot air outlet that can freely swing up and down, a variable blade drive control unit that rotates the variable wind direction blade in the vertical direction, and an amount of hot air from the hot air outlet or the heat generation means generated. a heat generation control unit that controls the variable blade drive control unit in conjunction with this change, and counts the time during which the heat generation means is operating, and after a predetermined period of time has elapsed. a first timer means for stopping the operation of the heat generation means via the heat generation control section; a timer initialization means for arbitrarily initializing the first timer means; and a timer initialization means for arbitrarily initializing the first timer means; A temperature check means that forcibly drives the variable wind direction blade in the vertical direction via the variable blade drive control unit and stops the heat generation control unit if vertical movement is not confirmed based on the signal. Variable wind direction blade drive control device for wind heaters. (2) When the check means is activated and the variable wind direction blade is forcibly driven in the vertical direction, and the vertical movement based on the drive signal is confirmed, the amount of hot air or the amount of heat generated by the heat generating means is increased again. 2. The variable wind direction blade drive control device for a hot air heater as claimed in 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 them.