JPH0726760B2 - 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.

BACKGROUND 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.
Is provided to mix the fuel gas from the burner 102 with the wind from the blower 103 received 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 during strong heating, medium heating, and weak heating. There has been a problem that the temperature distribution in the room may differ greatly from time to time. In other words, during strong heating, the air blown from the blower 103 is strong, so warm air is blown out to a long distance, 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, but the heating is Medium, as it becomes weaker and weaker, the amount of air blown from the blower 103 also becomes weaker, therefore the draft action of warm air becomes relatively strong and the reach distance of warm air becomes short and warm air does not reach your feet, It is strong, medium, and so on.
In the weak range, the indoor temperature distribution has a large difference and the user feels uncomfortable.

Therefore, the present inventor provides a rotatable variable blade 106 at the warm air outlet 104 as shown in FIG. 14, and rotates the variable blade 106 in accordance with the amount of warm air so that the temperature distribution can be made uniform. Thought. In this case, however, a large space 107 is formed below the upper variable blade 106 when the variable blade 106 is inclined so as to blow out warm air, and this space 107 obstructs the flow of warm air flowing as indicated by arrow A. However, the direction of the hot air and the flow velocity were not always sufficiently changed. This was especially noticeable at the weakest combustion warm air volume. Therefore, the comfortable space ratio is about 70% compared to the fixed louver type.
However, there is still room for improvement in improving the comfortable space ratio.

The present invention has been made in view of the above points, and is particularly intended to improve the comfortable space ratio at the time of the weakest heat generation.

Means for Solving the Problems In order to achieve the above object, the present invention provides a main body having a hot air outlet, heat generating means provided in the main body, and air is supplied to the heat generating means to provide the hot air outlet. And two upper and lower rotatable blades, a drive means for rotating each of the variable blades, and an amount of heat generated by the warm air volume or heat generation means for the upper variable blade of the variable blades via the drive means. And a control unit that tilts the lower variable blade so that its front end side is positioned downward when the weakest heat is generated.

Effect The present invention can change the blowing angle of the warm air by changing the inclination angle of the variable blade provided at the warm air outlet in accordance with the change of the heating capacity and changing the inclination angle of the variable air, so that the reach distance of the warm air is Even if the heating capacity is changed, it will not change,
The distribution of room temperature is less uneven, and more comfortable heating is possible. Moreover, the lower variable blade also becomes inclined at the time of the weakest heating to form a tapered blowout space with the upper variable blade, so that the flow of warm air was smoothed and the direction was changed by the upper variable blade. The effect of attracting the lower warm air to the flow of the upper warm air is added, and the warm air as a whole reaches farther, and the comfortable space ratio is improved accordingly.

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 is a combustion cylinder that covers the upper portion of the burner 4, and a honeycomb-shaped exhaust gas purifying catalyst 8 is provided in the upper opening. Reference numeral 9 is a duct provided in the heater body 1 so as to cover the combustion cylinder 7, and an opening 10 is formed in the lower portion. 11 is a convection blower mounted so as to face the rear of the duct, and is covered by a fan guard 12.
The indoor air sucked from the outside of the heater body 1 is supplied into the duct, mixed with the combustion gas from the combustion cylinder 7 in the duct 9, and blown out from the warm air outlet 3.

14 is an outlet frame provided in the lower opening 10 of the duct 9,
Support bracket A1 with both sides attached to both side plates 1a of the heater body 1
Spotted at 3 (see Fig. 2). The outlet frame 14 is formed in a concave shape in cross section to form an opening 15 in its bottom wall,
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 so that the duct 9
The opening 10 and the hot air outlet 3 are connected to each other. A guide piece 16 in the direction of inclination is provided on the upper edge of the outlet frame opening 15.

17 is an outlet frame 14 so that it is located above the warm air outlet 3.
The upper variable wing provided on the inner surface of the upper variable wing has an arcuate surface 18. As shown in FIG. 2, the variable vanes 17 are rotatable as shown by an arrow d by allowing a shaft 19 projecting at both ends thereof to pass through a supporting metal fitting A13 attached to the heater main body side plate 1a. Reference numeral 20 is a linking cam provided on one of the shafts 19 of the upper variable blade 17, and two pin shafts 21 and 22 are provided. Reference numeral 23 denotes a drive plate for swinging the upper variable vane 17, which is composed of a first drive plate 24 and a second drive plate 25, which are superposed so as to be slidable with each other and are usually integrated. It is movably linked via a compression spring 26. Of the above drive plates, two cutout grooves 24a, 24b are formed on the first drive plate 24 side, and one cutout groove 24a is formed.
A pin shaft 21 of one of the linking cams 20 of the upper variable vanes 17 is fitted to. Further, among the above-mentioned drive plates, a notch 28 for escape is formed on the side of the second drive plate 25, and a step 29 is formed which is a linking part with a drive motor described later. Reference numeral 30 is a guide for supporting the first and second drive plates 24 and 25 in a superposed state so as to be vertically movable.

Reference numeral 31 is a drive motor for moving the first and second drive plates 24 and 25 up and down, which is a stepping motor capable of forward and reverse rotations. A drive cam 32 is attached to the motor shaft of the drive motor. The drive shaft 33 of the cam 32 is engaged with and linked to the step portion 29 of the second drive plate 25. Reference numeral 34 is a tension spring for always engaging the second drive plate 25 with the drive cam 32.

Reference numeral 35 is a lower variable blade disposed below the upper variable blade 17. Third
The figure shows the side opposite to the support metal fitting A13, 36 is the support metal fitting B, and the upper variable blade 17 is provided on the other side of the upper variable blade 17.
37 is provided, and the lower variable vane 35 is provided with a lower variable vane lever 38. The pin shaft 37a of the upper variable blade lever 37 and the pin shaft 38a of the lower variable blade lever are connected by a connecting plate 39. Further, the portions of the connecting plate into which the pin shafts 37a, 38a are inserted have an upper slot 39a and a lower slot 30b, respectively. 40 is a connecting plate 39
Is a tension spring that links the upper part of the upper variable blade pin shaft 37a with the upper part of the upper variable blade. Reference numeral 42 is a torsion spring that applies an upward force to the upper variable blade lever 37, and 43 is a torsion spring that applies a similar force to the lower variable blade lever 38. 44 is a connecting plate support for preventing the connecting plate 39 from coming off.

On the other hand, reference numeral 45 shown in FIG. 1 denotes the combustion unit and the suspension motor 31.
A control unit for controlling the control unit, which is configured as shown in the block diagram of FIG. That is, 46 is a temperature detection unit including a thermistor, 47 is a room temperature setting unit that sets the room temperature, 48 is a signal S ₁ from the temperature detection unit 46 and a signal S ₂ from the room temperature setting unit 47 are compared, and Based on the output signal S ₃ from the comparison / determination unit 48, the comparison / determination unit 49 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 unit that controls the air flow rate outputs a signal S ₄ that controls the combustion amount and the air flow rate to the variable blade drive unit 51. Then, the variable blade drive unit 51 outputs a signal S ₅ for controlling the rotation angle of the upper variable blade 17 to the motor 31 based on the signal S ₄ .

FIG. 6 is a flow chart showing the processing state of the combustion control unit 51.

First, in step 65, the operation of the operation switch is determined.When the switch is turned on, the combustion amount is calculated according to the difference between the room temperature and the set temperature in the next step 66, and the same in the next step 67. The rotation speed of the blower 11 is calculated, and the pump frequency is calculated in the next step 68, and these are output as the combustion output in the next step 69. Then, after confirming the start of combustion in step 70, the upper variable blade angle is calculated in step 71 according to the combustion amount calculated in step 66, the angle output is output in step 72, and the upper variable blade 17 is set to a predetermined angle. Rotate.

Step 73 is a branch to determine whether it is in operation or stopped.If it is in operation, skip Step 74 and proceed to the next step, but if it is not in operation, process Step 74 and then move to the next step. To do. Here, in step 74, the angle of the upper variable blade 17 calculated in step 71 is reset to the angle of the stop position. Than this,
When stopped, the upper variable vane 17 can always be returned to the stop position.

Next, the operation of this embodiment configured as described above will be described.

First, before the start of operation, the upper and lower variable blades 17 and 35 are located in a substantially vertical direction (this position is referred to as a stop position) as shown by the solid line in FIG. 7, and cover the hot air outlet 2. .

When the operation switch is turned on from this state, the temperature detector 46
Also, the combustion control unit 49 is activated by the output S ₃ from the comparison determination unit 48 that is issued based on the output from the room temperature setting unit 47,
The control signal S ₄ is issued to start combustion according to a predetermined sequence, and the convection warm air machine 11 is rotated. Then, the variable blade drive unit 51 issues a signal S ₅ to
31 is driven to rotate the upper variable blade 17 at a predetermined angle.

That is, as the motor 31 rotates, the drive shaft 33 of the drive cam 32 rotates as shown by the arrow a as shown in FIG.
The second drive plate 25 pulled by 34 and the first drive plate 24 integrated with the second drive plate 25 via a tension spring 26.
Descends as shown by arrow b. As a result, the linkage cam 20 is inserted through the pin shaft 21 fitted in the cutout groove 24a of the first drive plate 24.
Rotates as indicated by arrow c, and the upper variable blade 17 which is integral with this via the linking cam 20 and the shaft 19 rotates as indicated by arrow d.

The rotation angle of the upper variable blade 17 is the signal S ₄ from the combustion control unit 49.
It changes depending on the combustion amount and the air flow rate of the convection blower, such as X in FIG. 7 for strong, Y for medium, and Z for weak.

At that time, the lower variable vane 35 changes in conjunction with the upper variable vane 17. That is, when the upper variable wing 17 rotates, the connecting plate 39 and the pin shaft 37a of the upper variable wing lever 37 are connected by the tension spring 40, so that the connecting plate 39 moves linearly downward. As a result, the pin shaft 38a of the lower variable blade lever 38 is rotated by being guided by the elongated hole lower 39b, and the lower variable blade lever 38 is rotated in conjunction with the upper variable blade lever 17. At this time, the lower variable wing lever is about to be pulled upward by the screw spring lower 43, so that the pin shaft 38a moves downward in the long hole 3
It is always in contact with the upper side of 9b.

Next, when the lower variable blade 35 comes into contact with the outlet frame 14 and the movement is stopped, as shown in FIG. 9, the tension spring 40 extends, and the pin shaft 37a of the upper variable blade lever 37 moves to the upper slot 39a. Slide inside. In other words, by setting the lengths l ₁ and l ₂ of the upper and lower variable blade levers 37 and 38 to approximately 2: 1, the lower variable blade 35 moves faster than the moving speed of the upper variable blade 17, and FIG. When the upper variable vane lever 37 is at X, the lower variable vane lever is at the position X ', and the warm air outlet is opened to the maximum, as shown in FIG. Next, in the middle, the upper variable vane is in the Y position, but the upper variable vane lever 37 only slides in the elongated hole 39a, so the position of the lower variable vane 35 is the same as X '. .

When weak, the upper variable vane 17 is at the Z position. At this time, the pin shaft 37a of the upper variable blade lever 37 abuts on the oblong hole 39a, and the connecting plate
As the 39 is lifted, the lower variable wing lever 35, which is constantly urged upward by the torsion spring 43, moves the lower 39
While coming into contact with the upper part of b, it will be lifted slightly,
It will be in the Z'position (Figs. 7 and 10).

As can be seen from the above, the upper variable vane is used during strong combustion and strong blast.
17 is substantially horizontal as shown in Fig. 9X, and the lower variable blade 35
Also becomes substantially horizontal like X ', eliminating a large space below the upper variable vane 17. Therefore, the flow velocity is increased as a whole, the warm air can reach farther than the conventional one, and comfort can be improved as shown in FIG. 11 X ″.
Next, at the time of medium combustion / medium air blowing, it becomes as shown in FIG. 7Y and inclines slightly downward. Therefore, the flow of warm air is lower than that when it is strong, and the hot air becomes like Y ″ in FIG. 11 and reaches farther than the conventional one. Since it is the same as the above, it prevents the temperature of the floor surface from rising too much by the downward flow of warm air. Similarly, when the combustion is weak and the air is weak, the upper variable vanes 17 move considerably downward as shown in Fig. 10Z. The lower variable vanes 35 are slightly lifted like Z ', and the warm air flows along the floor surface like Z "in FIG. 14 as it inclines.

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. In particular, due to the presence of the lower variable vane 35, the width of the air outlet 3 is narrowed, the flow velocity is increased, and the upper variable vane is increased.
By increasing the adhesion effect (Coanda effect) of the 17 to the arcuate surface 18 (improving the attraction effect), warm air is prevented from rising upward, and comfort is improved.

FIGS. 12 (A) and 12 (B) show a comparison of the comfortable space between one variable blade (A) and two variable blades according to the present invention (B). The comfortable space has been improved to 80%. It can be seen that there is no heat in the upper part and it is in a good state of "head cold foot heat".

Next, when heating is performed as described above and the operation is stopped, the variable blade drive unit 51 rotates the motor 31 to the original state because the output from the combustion control unit 49 disappears, that is, the arrow in FIG. Rotate to the side opposite to a and set the two variable wings 17,
At 35, the outlet 3 is closed.

In the description of the above embodiment, the upper variable vane 17 is made to be variable in association with both the combustion amount and the convection blowing amount, but this may be linked with at least one or the other. The specific configuration of is also shown as an optimum example for the present invention, and any configuration may be used as long as it achieves the objects and effects of the present invention.

Effects of the Invention As described above, the warm air heater of the present invention rotates the upper and lower variable blades of the hot air outlet in the vertical direction in conjunction with a change in the amount of warm air or the amount of heat generated by the heat generating means. Since it is moved, the temperature distribution in the room can be made almost constant regardless of the strength of the heating capacity, and a comfortable heating effect with less discomfort can be obtained.

In particular, when the lower variable blade is weak, it is inclined so that the flow of warm air is smoothed, and at the same time, the effect of attracting the flow of warm air that has been turned by the upper variable blade is added, and the warm air reaches farther as a whole. As a result, the comfortable space ratio at the time of weakness is improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a warm air heater according to an embodiment of the present invention, FIGS. 2 and 3 are enlarged perspective views of relevant parts, FIG. 4 is an external perspective view, and FIG. FIG. 6 is a block diagram, FIG. 6 is a flowchart showing operating states, FIG. 7 is a sectional view showing operating states, FIG. 8, FIG. 9 and FIG. 10 are side views showing operating states in table combustion state, and FIG. Figure is an explanatory view of action, Figure 12 is a figure showing experimental data showing comfort, Figure 13 is a sectional view showing a conventional warm air heater, and Figure 14 is a sectional view of a warm air heater before improvement. Is. 1 ... Main body, 3 ... Warm air outlet, 4 ... Heat generating means, 11
...... Convection blower, 17 …… Upper variable blade, 35 …… Lower variable blade,
45 ...... Control unit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuto Nakatani 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Akira Oshima, 1006 Kadoma, Kadoma City, Osaka 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 hot air from the hot air outlet, and the warm air outlet. Upper and lower rotatable blades of the variable blades are generated by the hot air flow rate or heat generation means through the drive means for rotating the variable blades. A warm air heater including a control unit that swings up and down according to the amount of heat to be generated and that makes the lower variable blade inclined so that its front end side is positioned downward when the weakest heat is generated.