JPH0726759B2 - 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, a hot air heater of this type, for example, a fan heater is
As shown in FIG. 16, a burner 1 as a heat generating means is provided in the main body 101.
02 is provided so that the combustion gas from the burner 102 is mixed with the air 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 the interior of the room warms up and the user's face etc. Even if the user wants 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 sometimes discomforted. 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 that the draft action of warm air becomes relatively strong, and the warm air reaches a short distance and the warm air reaches the feet. However, it is cold, and only the area near the heater gets hot and uneven temperature distribution occurs.
There was a big difference in the indoor temperature distribution in the middle and weak areas, resulting in the user's discomfort.

Therefore, the applicant provided a rotatable variable blade 106 on the hot air outlet 104 as shown in FIG. 17, and the user can turn the variable blade 106 as necessary so that the user can warm the air to the user. It was thought that it could be prevented from hitting, and the temperature distribution could be made more uniform.

However, in this case, since the flow direction and the flow velocity are uniquely determined by the angle of the variable blade 106, the optimum temperature distribution setting is not always realized. Therefore, compared with the fixed louver type, the comfortable space ratio was greatly improved by about 70%, but 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 aims to improve the comfortable space ratio.

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 the hot air blowing by supplying air to the heat generating means. A convection blower that blows out warm air from the outlet, rotatable upper and lower variable blades that are vertically arranged at the hot air outlet, and the upper variable blade that adjusts the amount of warm air or the amount of heat generated by heat generating means. Accordingly, the control unit is configured to swing up and down according to the manual operation or to manually rotate the lower variable blade in a substantially horizontal direction.

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. Will not change even if the heating capacity is changed, and the uneven distribution of room temperature will be small, and more comfortable heating will be possible. Moreover, due to the existence of the lower variable wing,
In addition to smoothing the flow of warm air, the effect of attracting the warm air whose direction is changed by the upper variable blades is added, and the warm air reaches farther as a whole, 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 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 room air sucked from the outside of the heater main body 1 into the duct, and then 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 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 drive motor 31.
Is a control unit for controlling the control unit, which is configured as shown in the block diagrams of FIGS. That is, 46 is a temperature detection unit including a thermistor, 47 is a room temperature setting unit that sets the room temperature, and 48 is a signal S ₁ from the temperature detection unit 46 and a room temperature setting unit.
The signal S ₂ from 47 is compared, and depending on the difference, for example, strong,
A comparison determination unit that outputs a signal S ₃ such as medium or weak, and a combustion control unit 49 that controls the combustion amount of the burner 4 and the ventilation amount of the convection blower 11 based on the output signal S ₃ from the comparison determination unit 31. Department,
50a, 50b ... Are switches for driving the motor 31, and the variable blade drive unit 51 rotates the motor 31 by a predetermined angle in response to a signal from the switches 50a, 50b. On the other hand, in FIG.
The combustion control unit 49 also outputs a signal S ₄ for controlling the combustion amount and the blown air amount to the variable blade driving 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. 7 shows an example of a concrete circuit of the main part in FIG. The combustion control unit 49 is composed of a microcomputer 52 and peripheral circuits. The microcomputer 52 shown here is a so-called one-chip microcomputer having a CPU, ROM, RAM, and an input / output unit.

The temperature detection unit 46 and the volume 53 are connected to the input unit of the microcomputer 52 via the A / D converter 54. As a result, the temperature signal from the temperature detector 46 and the angle signal of the upper variable blade 17 are converted into binary codes and read by the microcomputer 52. Reference numeral 55 is an operation switch for instructing the start of combustion, which is input to the microcomputer 52. Reference numeral 57 is a zero-cross detection circuit for generating a pulse signal having a width of about 1 ms for detecting the zero-cross point of the AC signal source 58 synchronized with the power supply frequency, and this pulse signal indicates the zero-cross point to the microcomputer 52. Reference numeral 59 is a semiconductor switch, which is composed of a light emitting LED and a light receiving triac. Reference numeral 60 is a relay for turning on / off the electric heating element 61, and 62 is an igniter. Reference numeral 63 denotes a driver, which has output terminals connected to the semiconductor switch 59, the relay 60, the electromagnetic pump 64, the igniter 62, and the stepping motor 31, and amplifies an output signal from the microcomputer 52 to drive each load. On the other hand, the AC power source 65 is connected in parallel with the electric heating element 61 via the contact 60a of the relay 60 and the blower 11 via the semiconductor switch 59, and the blower 11 is adjusted to any rotation speed by phase control. be able to.

FIG. 8 is a flow chart showing the processing state of the microcomputer 52.

First, in step 65, the operation of the operation switch 55 is determined. If the switch 55 is turned on, the next step 66
Calculates the combustion amount according to the difference between the room temperature and the set temperature in step 67, the rotation speed of the blower 11 is calculated in step 67, the pump frequency is calculated in step 68, and the combustion output is calculated in step 69. Issue as. 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 drive output thereof 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. As a result, the upper variable blade 17 can always be returned to the stop position when stopped.

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

First, before the start of operation, the upper and lower variable vanes 17 and 35 are located in a substantially vertical direction (this position is referred to as a stop position) as shown in FIG. 9, and cover the hot air outlet 2.

When the operation switch 45 is turned on from this state, first the relay
By turning on 60, the electric heating element 61 is energized and preheated. When preheating is completed, the relay 60 is turned off, then the igniter 62 is turned on, and the combustion control section 49 outputs a constant pulse signal from the output section to the electromagnetic pump 64 to perform ignition and combustion, and at the same time, the blower.
11 is rotated, and the upper variable blade 17 is rotated at a predetermined angle from the stop position.

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 amount of combustion and the amount of air blown by the convection blower, such as X in FIG. 9 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 shaft 39 moves downward in a linear motion. 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 blade lever tends to be pulled upward by the lower torsion spring 43, so that the pin shaft 38a is always in contact with the lower portion of the long hole 39b.

Next, when the lower variable blade 35 comes into contact with the outlet frame 14 and the movement is stopped, as shown in FIG. 11, 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. That is, 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 '. (Fig. 12).

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 is in the Z'position (Figs. 9 and 13).

In FIGS. 11 to 13, 75 is an upper variable blade stopper for preventing the upper variable blade lever from coming off, and 76 is a lower variable blade stopper for preventing the lower variable blade lever from coming off.

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. 11X, and the lower variable blade 35
Is also almost horizontal like X '. Therefore, the flow velocity is increasing as a whole, the warm air can reach farther than the conventional one and the comfort can be improved as shown in Fig. 14 X ". In the case of medium air flow, it becomes like Y in Fig. 12 and inclines slightly downward, so the flow of warm air is downward than in the case of strong wind and the warm air becomes like Y "in Fig. 14, It will reach farther than anything. Further, since the lower variable blade 35 is in the same state as X ', it prevents the warm air from flowing too downward and the temperature of the floor surface from rising. Similarly, when the combustion is weak and the air is weakly blown, the upper variable blade 17 inclines downward as shown by Z in FIG. 13, and the lower variable blade 35 also lifts up slightly like Z ′, so that the warm air is It flows along the floor like Z ″ in 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. 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.

15 (A), (B), and (C) are fixed louvers (A),
A comparison of the comfortable space between one variable blade (B) and two variable blades according to the present invention (C) is shown. The comfortable space has been improved to 80% and the upper part has not become hot, It can be seen that the condition of "head cold foot fever" is in good condition.

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. This makes the first
-The second drive plates 24 and 25 are lifted upward, and the linkage cam 20
Is rotated in the direction opposite to the arrow c to return the upper variable vane 17 to its original state, that is, in a substantially vertical direction. Then, since the connecting plate 49 connected to the upper variable blade 17 is lifted upward in the lower variable blade 35, the connecting plate 49 is biased by the torsion spring 43.
While being in contact with the upper part of the lower long hole 49b, it is rotated and returned in a substantially vertical direction.

Therefore, when the operation is stopped, the upper variable blade 17 and the lower variable blade 35 almost completely cover the air outlet 3, so that dust and the like can be prevented from entering the combustion section, and the design is very refreshing. It can be done.

In the description of the above embodiment, the upper variable blade 17 is made variable in association with both the combustion amount and the convection air flow amount, but this may be associated 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, the presence of the lower variable amount smoothes the flow of warm air, and at the same time, the effect of attracting the flow of warm air whose direction is changed by the upper variable blade is added, and the warm air reaches farther as a whole. The comfortable space ratio is improved.

In addition, when the operation is stopped, the variable blades are positioned in a substantially vertical direction to close almost the entire surface of the hot air outlet, so the appearance is neat and the appearance is greatly improved. It is possible to provide a warm air heater having excellent comfort, durability, appearance, and safety that can prevent the cause of entering and abnormal combustion.

[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 and FIG. 3 are enlarged perspective views of the relevant parts, FIG. 4 is an external perspective view, FIG. 5 and FIG. Is a block diagram showing the control unit, FIG. 7 is a specific circuit diagram in the case of FIG. 6, FIG. 8 is a flowchart showing an operating state, FIG. 9 is a sectional view showing an operating state, FIG. 11, 12 and 13 are side views showing the operating state in each combustion state, FIG. 14 is an explanatory view of action, FIG. 15 is experimental data showing comfort, and FIG. 16 is conventional warm air. FIG. 17 is a cross-sectional view showing the heater, and FIG. 17 is a cross-sectional view of the warm air heater before the modification. 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 Mitsuhiro Imajima 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Toshiharu Ishikawa, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Akira Oshima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A main body having a hot air outlet, heat generating means provided in the main body, a convection blower for supplying hot air to the heat generating means to blow hot air from the hot air outlet, The upper and lower rotatable variable blades arranged vertically at the hot air outlet and the upper variable blade are vertically swung in accordance with the amount of warm air or the amount of heat generated by the heat generating means or by manual operation. , A warm air heater having a control unit for rotating the lower variable blade in a substantially horizontal direction. 2. The upper and lower variable blades are pivotally supported so as to be positioned in a substantially vertical direction when the operation is stopped, and after the operation is started, the upper and lower variable blades are rotated to a predetermined position according to the amount of warm air or the amount of heat generated by the heat generating means. The hot air heater according to claim 1, which is configured to operate.