JPH0676860B2 - 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 is
As shown in the figure, a burner 102 which is a heat generating means is provided in the main body 101.
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 warm air from hitting the room, the user must either leave the warm air heater or move the warm 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, so the draft effect of the blower becomes relatively strong and the warm air reach becomes short and only the area near the heater becomes hot. There is a large difference in the indoor temperature distribution between strong, medium, and weak such as uneven temperature distribution, which causes the user to feel discomfort.

The present invention has been made in view of such a point, and minimizes the difference in temperature distribution and the difference in warm air temperature, and adds a devise to the warm air blowing configuration during weak heating to always provide comfortable heating. It is intended to be obtained, inexpensive, and easy to use.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a variable blade provided at a hot air outlet so as to be able to swing up and down with a proper point as a fulcrum, a temperature detection unit for detecting the temperature of a space to be heated, and the same. Based on the difference between the room temperature setting unit that sets the heating temperature of the space to be heated and the temperature detected by this temperature detection unit and the temperature set by the room temperature setting unit, the amount of warm air from the hot air outlet and the heat generation means are set. A control unit that changes both the amount of heat generated and that rotates the variable blade in the up-and-down direction approximately in synchronization with this change is provided, and the control unit moves the variable blade downward when the amount of warm air and the amount of heat are changed to the weak side. The variable blade has a lower inner surface formed in an arc shape, and is inclined in a substantially horizontal direction so as to face the lower inner surface of the variable blade. As a configuration with a guide piece is there.

Operation According to the present invention, the heating capacity is changed based on the difference between the temperature of the space to be heated and the set temperature according to the above configuration, and the inclination angle of the variable blades provided at the hot air outlet is changed to change the blowing angle of the warm air. Like Therefore, if the air is weakly heated, the warm air is blown downward and the room temperature rises, so the draft of the warm air becomes relatively weak, and the warm air reaches even if the heating capacity is changed. It will be the same as the conventional one, and the temperature distribution at each heating capacity will be almost the same. Especially during weak heating, the arcuate portion of the lower inner surface of the variable blade exerts a Coanda effect, and of the hot air from below the variable blade, the upper one blows out in a substantially horizontal direction so that the hot air from below is pressed in. As a result, the warm air reaches farther, the temperature unevenness during weak heating can be further reduced, and it is strong like the one that reduces the opening area of the hot air outlet to increase the wind speed. Comfortable heating is possible without feeling warm air.

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. A burner case 5 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.

14 is an outlet frame provided in the lower opening 10 of the duct 9,
Support fittings 13 with both sides attached to both side plates 1a of the heater body 1
(See Fig. 2). The outlet frame 14 is formed to have a concave cross section, and an opening 15 is formed in the bottom wall thereof. The opening 15 is aligned with the opening 10 of the duct 9 and the frame edge is formed.
14a is brought into contact with the inner surface of the front plate 2 so that the opening 1 of the duct 9
0 and the hot air outlet 3 are connected. A guide piece 16 in a substantially horizontal direction is attached to the lower edge of the outlet frame opening 15.

The reference numeral 18 designates an outlet frame 14 so as to be located above the warm air outlet 3.
The variable blade provided on the upper part is formed wide so as to cover approximately the upper half of the outlet frame 14, and its inner surface side is an arcuate surface 18a. As shown in FIG. 2, this variable vane 18 is a support fitting in which a shaft 19 having both ends projecting is attached to the heater main body side plate 1a.
It is made to penetrate through 13 and is rotatable as shown by arrow d.
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 part of which is directly rotatably connected to the pin shaft 21 of the linking cam 20. Reference numeral 25 is a drive motor for moving the link plate 23 up and down, which is a stepping motor capable of forward and reverse rotations, and a drive cam 26 is attached to the motor shaft of the stepping motor.
Springs 24a and 24b are attached to the drive shaft 27 of the drive cam 26 and are linked to the link plate 23.

Reference numeral 28 is a control section for controlling the combustion section and the drive motor 25, which is constructed as shown in the block diagram of FIG. 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 Depending on the difference, for example, a signal S ₃ such as strong, medium or weak
A reference numeral 32 for outputting the combustion amount of the burner 4 and the convection blower 11 based on the output signal S ₃ from the comparison determination section 31.
In the combustion control unit for outputting a signal S ₄ for controlling the air volume, the combustion control unit 32 is arranged to output also a signal S ₄ for controlling the combustion amount and blowing amount to the variable vane drive unit 34. Then, the variable blade drive unit 34 outputs a signal S ₅ for controlling the rotation angle of the variable blade 18 to the motor 25 based on the signal S ₄ .

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

First, before the start of operation, the variable blade 18 is 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 operated by the output S ₃ from the comparison / determination unit 31 which is generated based on the outputs from the temperature detection unit 29 and the room temperature detection unit 30, and the control is performed. A signal S ₄ is emitted to start combustion according to a predetermined sequence, and the convection blower 11 is rotated. Then, the control signal S ₄ drives the motor 25 to rotate the variable blade 18 at a predetermined angle.

That is, the rotation of the motor 25 causes the drive portion 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 shows by the arrow b.
To descend. As a result, the linking cam 20 connected to the link plate 23 and the pin shaft 21 rotates as indicated by the arrow c, and the variable blade 18 integrated via the linking cam 20 and the shaft 19 rotates as indicated by the arrow d. is there. The rotation angle of the variable blade 18 is determined by the temperature detection unit 29 and the room temperature setting unit 30 together with the combustion amount and the warm air blowing amount.
It changes depending on the signal S ₄ emitted by the combustion control unit based on the output from the, and when the room temperature is low, strong combustion and strong blast occurs, and at X in Fig. 3, when the room temperature rises, medium combustion and medium blast occurs. Along with Y in the figure, the temperature rises further to 30
When the temperature rises to the value set in step 2, the combustion becomes weak and the air is weak, and the temperature changes as indicated by Z in the figure.

Therefore, when the room temperature is low, strong combustion and strong blast,
At that time, the variable blades 18 are substantially horizontal as shown in Fig. 3X, but when the room temperature rises, medium combustion / medium air blowing occurs,
At that time, it inclines 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 as shown in FIG. 6'Y ', and reaches farther than the conventional one.

Next, when the room temperature further rises to reach the set temperature, weak combustion / weak air blowing occurs, and at that time, the variable vanes 18 incline considerably downward like Z, and the warm air flows in Z ′ in FIG. It will flow along the floor like. At that time, the room temperature is rising, the difference between the warm air temperature and the room temperature is smaller than when the heating was started, and the draft of the warm air is relatively weak.

Therefore, even if the flow velocity of the warm air is low and it is easily affected by the draft, the warm air can reach 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.

Here, the blowing condition of the warm air from the warm air outlet 3 will be described in detail with reference to FIGS. 5 (A) and 5 (B). In FIG. 5 (A), the inner surface of the variable blade 18 is an arc-shaped surface 18a. In this case, the same figure (B) shows the case where the flat surface 18b is used, and each shows the state of weak heating. When the plane 18b in FIG. 5 (B) is used,
As shown in the vector diagram, the warm air blown out from the warm air outlet 3 is smaller than a and b and has the same direction. Therefore, after it is blown out, it is likely to rise due to the influence of the draft action. However, the variable wing shown in Fig. 5 (A)
When the inner surface of 18 is an arcuate surface 18a, due to the Coanda effect of this arcuate surface 18a, the wind in the upper part, that is, a, is larger than the lower winds, b and c, as shown in the vector of (A). The wind speed is large and the direction (wind direction) is almost horizontal. Since this action is due to the Coanda effect of the arcuate surface, the loss of wind direction conversion is small and the total amount of vectors (hot air amount) is large.
Therefore, this warm air has a high wind speed at the upper part a and is less likely to be affected by the draft action, and the warm air reaches a great distance and greatly expands the comfortable space. Particularly, by providing the guide piece 16 inside the warm air outlet 3 and facing the lower part of the variable blade 18, the Coanda effect can be more remarkably exhibited, and the range of the comfortable space can be further improved. . In addition, the Coanda effect is effective because it begins to be strongly exerted as the heating speed becomes weaker and becomes weaker, and at the same time, it becomes strong heating (strong wind speed) and the Coanda effect becomes weaker, so the warm air is almost horizontal. As a result, good warm air can be blown out in all regions from strong to weak.

In addition, since the opening area of the hot air outlet is not reduced in this warm air heater, even if there is an effect of securing the wind speed by the Coanda effect, it does not become a strong wind speed like one that changes the area of the hot air outlet. The person will not feel the warm air strongly. That is, the user can comfortably heat without feeling a feeling of warm air and feeling uncomfortable.

In the above embodiment, the variable blade is explained as one piece,
This may be a plurality of sheets, and any other structure may be used as long as it achieves the intended purpose.

Effects of the Invention As described above, the warm air heater of the present invention changes the amount of warm air and the amount of heat generated by the heat generating means based on the difference between the temperature of the space to be heated and the set temperature, and makes them substantially interlock with this. Since the variable blades at the hot air outlet are driven by the hot air outlet, when the difference between the temperature of the space to be heated and the set temperature is large, the amount of warm air and the amount of heat are large (strong heating) and the variable blades are directed toward the horizontal direction. When the difference between the temperature and the set temperature is small, the amount of warm air and the amount of heat are small (weak heating)
The variable wing will face downward.

Therefore, when the temperature of the space to be heated rises and the difference between the temperature of the space to be heated and the set temperature becomes small, the variable vanes are directed downward, so even if the volume of warm air decreases and the flow velocity decreases, Is to flow along the floor surface, and at that time, the difference between the temperature of the heated space and the hot air temperature is smaller than when the heating was started, and the draft of warm air is relatively weak. The synergistic action of both causes the warm air to flow farther.

In addition, in the present invention, the variable blade itself exerts the Coanda effect, and during the weak heating, the upper part of the hot air from the lower side of the variable blade blows out in a substantially horizontal direction and presses the warm air from the lower side. The wind can reach warm air farther.

Therefore, when the difference between the temperature of the space to be heated and the set temperature is small, the temperature distribution similar to that when it is large, that is, the difference in the temperature distribution in the entire room is smaller than in the past, and comfortable heating is always possible. Become.

In addition, since the amount of warm air and the amount of heat change based on the difference between the temperature of the space to be heated and the set temperature, these values can be used for both strong heating and small heating where the difference between the temperature of the heated space and the set temperature is large. Compared to the conventional one that does not change one, it is possible to heat with warm air with a smaller temperature difference, and comfort is further improved.

In addition, the warm air at the time of weak heating does not change the opening area of the hot air outlet, so the flow velocity is weak compared to changing the opening area of the hot air outlet, and the user does not feel the warm air too strongly. As a result, it is possible to heat comfortably.

Also, since the variable blades are driven based on the difference between the temperature of the space to be heated and the set temperature, it is possible to ensure that the angle is set based on the temperature condition of the space to be heated without being affected by the temperature of the hot air. Become. Therefore, even if the user does not change the temperature of the hot air or change the direction of the variable blades, the heating can be automatically performed with the hot air volume, the amount of heat, and the variable blade angle suitable for the temperature condition of the space to be heated. It is also easy to use, and comfortable heating can be reliably achieved.

Further, since the variable vanes are driven by using the output from the temperature detection unit that detects the temperature of the space to be heated, it is possible to provide the variable vanes easily and inexpensively without the need for additional detecting means for controlling the variable vanes. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a warm air heater according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the same main part, FIG. 3 is an enlarged cross-sectional view of the same, and FIG. 4 is a block showing the same control part. Figure, Figure 5A,
B, FIG. 6 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 (burner), 11 ... Convection blower, 16 ... Guide piece, 18 ... Variable blade, 18a ... Arc surface, 25 ... … Driving means (motor), 2
8 ... Control unit.

Front page continued (72) Inventor Tadashi Yamazaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Toshiharu Ishikawa 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. Takashi Nishikawa 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A main body having a hot air outlet, a heat generating means provided in the main body, a blower for supplying air to the heat generating means to blow out the warm air from the hot air outlet, and a proper place as a fulcrum. The variable blades arranged at the hot air outlet so as to be able to swing up and down, the temperature detecting unit for detecting the temperature of the heated space, the room temperature setting unit for setting the heating temperature of the heated space, and the temperature detecting unit. Based on the difference between the detected temperature and the temperature set by the room temperature setting unit, both the amount of warm air from the hot air outlet and the amount of heat generated by the heat generating means are changed, and the change is made substantially in conjunction with this change. A control unit for rotating the blades in the vertical direction is provided, and the control unit is configured to change the direction of the warm air downward by inclining the variable blade downward when the amount of heat and the amount of heat are changed to the weak side. Also, the variable vane has an arc on its inner surface at the bottom. And forming, the hot air heater in which a substantially horizontal direction of the guide piece to the lower inner surface facing the variable vane.