JPH0830613B2 - Hot air heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater that heats a room using warm air.

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

However, since the louver 105 provided at the hot air outlet 104 is fixed to the main body, it is impossible to change the blowing direction of the hot air, and the interior of the room warms up and the user's face etc. Even if you want to prevent the hot air from hitting the room, the user must either leave the hot air heater or move the hot air heater. I was hit and sometimes felt uncomfortable.
When the operation of the warm air heater was stopped to avoid this, the room temperature fell and it felt cold, so comfortable heating could not be obtained.

Further, since the louver 105 is fixed and the direction of warm air cannot be changed, there is a problem in that there is a large difference in the temperature distribution in the room during strong heating, medium heating, and weak heating. In other words, during strong heating, the air blown from the blower 103 is strong, so warm air is blown out far and the living space normally used by the user (the space other than the ceiling 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, and as a result, the draft action of warm air becomes relatively strong and the warm air reach becomes short and only the area near the heater gets hot. As a result, there is a large difference in the temperature distribution in the room between strong, medium, and weak such as uneven temperature distribution, and the user feels uncomfortable.

Therefore, the present inventor provides a rotatable variable blade at the hot air outlet and rotates the variable blade as necessary,
We considered that the user can prevent the user from hitting the hot air and the temperature distribution can be made more uniform.
However, in this case, if the variable blades are made almost vertical to prevent the warm air from hitting the user, most of the warm air outlet will be blocked, and the warm air will be trapped inside the equipment body and overheat inside the equipment body. However, there is a problem that the hot air blowing direction suddenly changes and the flow velocity drops drastically, and the hot air blown from the hot air outlet rises immediately and the desired effect cannot be obtained. It was

The present invention has been made in consideration of such problems, and an object thereof is to provide comfortable heating and prevent overheating and the like in the device body.

Means for Solving the Problems In order to achieve the above object, the present invention provides a variable air wing which is driven at a hot air outlet according to the amount of heat generated by a heat generating means or the amount of warm air, or by manual operation, Is located above the outlet frame and covers approximately half of the outlet opening, and when it is rotated substantially vertically with its inside as an arcuate surface, there is a space between it and the lower frame surface of the outlet frame. And the lower frame surface is also bent in an arc shape.

Effect The present invention has the above-described configuration to make the variable blades substantially vertical so that the warm air does not hit the face of the user, and the warm air can reach a relatively long distance even during weak heating, thereby providing comfortable heating. In addition to being obtained, even in such a state, the warm air will be blown out smoothly along the arcuate surface of the lower frame surface of the outlet frame, and the warm air will be trapped inside the device body,
The blowing speed of warm air does not drop rapidly.

EXAMPLE An example of the present invention will be described below with reference to the drawings. 1 is a heater body, 2 is a front plate mounted on the front surface of the heater body 1, and has a warm air outlet 3. Reference numeral 4 denotes a burner provided in the heater main body 1, which serves as heat generating means. In this embodiment, a vaporization type burner for vaporizing and burning kerosene is used. Reference numeral 5 denotes a burner case that covers the lower portion of the burner 4 and is attached to the partition plate 6. Reference numeral 7 denotes a combustion cylinder that covers the upper portion of the burner 4, which is erected on the partition plate 6, and a honeycomb-shaped exhaust gas purifying catalyst 8 is provided at the upper opening. Reference numeral 9 is a duct provided in the heater main body 1 so as to cover the combustion cylinder 7, and an opening 10 is formed in the lower front portion. Reference numeral 11 denotes a convection blower mounted so as to face the rear of the duct, which is covered by a fan guard 12 and supplies the indoor air sucked from the outside of the heater main body 1 into the duct and from the combustion cylinder 7 in the duct 9. It is made to be mixed with the combustion gas of and blown out from the hot air outlet 3.

Reference numeral 14 denotes an outlet frame provided in the lower opening 10 of the duct 9, both sides of which are screwed to a support metal fitting 13 (see FIG. 2) attached to both side plates 1a of the heater body 1. This outlet frame
14 is formed to have a concave cross section, and an opening 15 is formed in the bottom wall of the duct 9. The opening 15 is aligned with the opening 10 of the duct 9 and the frame edge 14a is brought into contact with the inner surface of the front plate 2 to form a duct 9. The opening 10 and the hot air outlet 3 are connected to each other. The lower frame surface 14b of the outlet frame opening 15 is bent in an arc shape, and the end portion on the outlet side is a substantially horizontal surface 14c.

18 is an outlet frame so that it is located above the warm air outlet 3.
The variable blades provided in 14 are formed wide so as to cover approximately the upper half of the outlet frame 14, and the inner surface side thereof has an arcuate surface 18a.
There is. As shown in FIG. 2, the variable vanes 18 are rotatable as shown by an arrow d by allowing a shaft 19 projecting at both ends thereof to penetrate through a support fitting 13 attached to the side plate 1a of the heater body. Reference numeral 20 is a linking cam provided on one of the shafts 19 of the variable blades 18, and has a pin shaft 21. Reference numeral 23 denotes a link plate for swinging the variable vane 18, the upper portion of which is directly rotatably connected to the pin shaft 21 of the linking cam 20, and the lower portions of which are provided with protrusions 23a and 23b for mounting springs 24a and 24b. Reference numeral 25 is a drive motor that moves the link plate 23 up and down, and is composed of a stepping motor that can rotate in the forward and reverse directions. A drive cam 26 is attached to the motor shaft of the stepping motor. By attaching the springs 24a and 24b, the lower protrusion 23 of the link plate 23
It is linked to a and 23b.

A control unit 28 controls the combustion unit and the drive motor 25, and is configured as shown in the block diagrams of FIGS. 4 and 5. That is, 29 is a temperature detection unit including a thermistor, 30 is a room temperature setting unit that sets the room temperature, 31 is a signal S ₁ from the temperature detection unit 29 and a signal S ₂ from the room temperature setting unit 30 is compared, and Based on the output signal S ₃ from the comparison / determination unit 31, the comparison / determination unit 32 outputs a signal S ₃ such as strong / medium / weak according to the difference, and the combustion amount of the burner 4 and the convection blower 11 The combustion control units 33a, 33b, ... For controlling the amount of air blow are switches for driving the motor 25, and the variable blade drive unit 34 rotates the motor 25 by a predetermined angle in response to a signal from the switches 33a, 33b. On the other hand, in FIG. 5, the combustion control unit 32 also outputs a signal S ₄ for controlling the combustion amount and the blown air amount to the variable blade drive unit 34. Then, the variable blade drive unit 34 outputs a signal for controlling the rotation angle of the variable blade 18 based on the signal S _4.
It is designed to output S ₅ to the motor 25.

The operation of the hot air heater configured as above will be described below.

First, before the start of operation, the variable vanes 18 are positioned in a substantially vertical direction as shown in FIGS. 3 and 7.

When the operation switch 35 (see FIG. 7) is turned on from this state, the combustion control unit 32 is activated by the signal S ₃ from the comparison determination unit 31 generated based on the outputs from the temperature detection unit 29 and the room temperature detection unit 30, The control signal S ₄ is issued to start combustion in accordance with a predetermined sequence, and the convection blower 11 is rotated. The Figure 4 switch 33a by the user in the case of, 33b ... drives the motor 25 variable vane drive unit 34 issues a signal S ₅ in response to the switch by pressing one of the variable vane 18 predetermined Rotate to an angle.

That is, the rotation of the motor 25 causes the drive shaft 27 of the drive cam 26 to rotate as shown by the arrow a, and the link plate 23 linked through the springs 24a and 24b as shown by the arrow b. To descend. As a result, the link plate 23 and the pin shaft 21
The link cam 20 connected by means of the arrow rotates as indicated by arrow c, and the variable vane 18 integrated with the link cam 20 and the shaft 19 rotates as indicated by arrow d.

Therefore, if the room becomes warm and the user does not want to receive hot air, one of the switches 33a, 33b, ... May be operated so that the variable blade 18 becomes substantially vertical. The wind is blown downward so that the warm air does not directly hit the face of the user.

Further, in the case of FIG. Variable wings
The rotation angle of 18 varies depending on the signal S ₄ from the combustion control unit 32. When the force is strong, X in FIG. 3, when it is medium, it is Y, when it is weak, it is Z and the amount of combustion and the air flow of the convection blower. Changes in conjunction with. Therefore, the variable blades 18 are substantially horizontal as shown in FIG. 3X when strong combustion and strong air blowing are performed, but when the medium combustion and strong air blowing are performed, the variable blades 18 become slightly downward as shown in FIG. Therefore, the flow of warm air is downward as compared to when it is strong, and the hot air becomes like Y ′ in FIG. 6, and reaches farther than the conventional one. Similarly, when the combustion is weak and the air is weak, the variable blades 18 incline considerably downward like Z,
The warm air flows along the floor surface as shown in Z'of FIG. Therefore, even if the flow velocity of the warm air is low and it is easily affected by the draft, the warm air reaches farther than the conventional one. That is, the temperature distribution in the room is close to the temperature distribution during strong combustion, and the temperature distribution is similar for strong, medium, and weak.

The heating is performed as described above. Here, the flow of the warm air when the variable vanes 18 are substantially vertical will be described. This is as shown by the arrow A in FIG. It is blown out smoothly by the arcuate surface 14b. That is, the presence of the arcuate surface 14b widens the gap between the variable blade 18 and the lower frame surface (the arcuate surface 14b) of the outlet frame 14, and the lower frame surface (the arcuate surface 14b) is a smooth curved surface. Therefore, the flow of warm air does not change its direction suddenly, but it flows out in a natural state. Therefore, warm air will not be trapped in the main body 1 and the blowing speed will not be drastically reduced. Further, since the outlet side end of the lower frame surface of the outlet frame 14 is a substantially horizontal plane 14c, the arc-shaped surface 14b.
The hot air which is blown out and is blown out in a substantially horizontal direction along the substantially horizontal surface 14c and comes into contact with the floor surface at a distance from the hot air outlet 3. Therefore, there is no possibility that the hot air in the high temperature state immediately after being blown out from the hot air outlet 3 contacts the floor surface and discolors it.

In the above embodiment, the variable blade is described as a single piece, but it may be a plurality of pieces and any other structure may be used as long as it achieves the intended purpose. Good.

EFFECTS OF THE INVENTION As described above, the warm air heater of the present invention rotates the variable blades of the hot air outlet to prevent the hot air from directly hitting the face of the user, and is related to the strength of the heating capacity. Without this, the temperature distribution in the room can be made more uniform, and comfortable heating without discomfort can be performed. Even when the variable blades are set to be almost vertical, the warm air is blown out smoothly, the equipment itself does not overheat, and the warm air also flows further, so comfort is not impaired. And so on.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hot air heater according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the same part, FIG. 3 is an enlarged cross-sectional view of the same, FIG. 4 and FIG. Block diagram showing a part, 6th
FIG. 7 is an operation explanatory view, FIG. 7 is an external perspective view, and FIG. 8 is a sectional view showing a conventional hot air heater. 1 ... Main body, 3 ... Warm air outlet, 4 ... Heat generating means, 9
...... Duct, 10 ...... Opening, 11 ...... Convection blower, 14 ・ ・ ・
… Blowout frame, 14b …… Arc surface, 14c …… Horizontal plane, 18…
… Variable blades, 25 …… Drive means (motor), 28 …… Control section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuhiro Imajima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Tadashi Yamazaki 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References Japanese Unexamined Patent Publication No. 62-19645 (JP, A) Actual development No. 62-62164 (JP, U) Japanese Patent Publication No. 61-9544 (JP, B2)

Claims (2)

[Claims] 1. A main body having a hot air outlet, heat generating means provided in the main body, and a duct surrounding the heat generating means, and air is supplied around the duct to blow out the warm air from the hot air outlet. A blower to be installed, and a blower outlet frame is provided between the warm air blower outlet and the opening in the front of the duct, which is located at the upper portion of the blower outlet frame and covers almost half of the upper opening of the warm air blower outlet in the vertical direction. And a variable vane rotatably provided on the inner side of the variable vane, which has an arcuate inner side and is driven according to the amount of heat or the amount of warm air generated by the heat generating means, and which faces the inner side of the variable vane. A warm air heater whose frame is bent in an arc shape. 2. The warm air heater according to claim 1, wherein the outlet side end of the arcuate surface of the outlet frame is substantially horizontal.