JPH0781741B2 - 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. 10, a burner 1 as a heat generating means is provided in the main body 101.
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 heat the inside of the blowout chamber from the warm air outlet 104. 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 by the blower 103 is strong, so warm air is blown out far and the living space normally used by the user (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 reach of the air blow becomes short and the warm air does not reach the feet. , It is cold, and only the vicinity of the heater gets hot and uneven temperature distribution occurs.
In the middle and the weak, the indoor temperature distribution has a large difference and the user feels uncomfortable.

Therefore, the applicant provided a rotatable variable blade 106 at the hot air outlet 104 as shown in FIG. 11 and rotated the variable blade 106 as needed so that the user could warm the air to the user himself. 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 setting of the optimum temperature distribution is not necessarily expressed. 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 circumstances, and an object thereof is to improve a comfortable space ratio and an appearance by an inexpensive structure.

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. The convection blower that blows warm air out of the outlet, the rotatable upper and lower variable vanes vertically arranged at the hot air outlet, and the upper variable vane are used for the amount of warm air or the amount of heat generated by heat generating means. The upper variable vane has an inner surface of an arcuate surface and a lower portion of the lower variable vane that is pivoted in a substantially horizontal direction. The distance from the lower end of the lower variable vane to the fulcrum is shorter than the distance from the lower end of the upper variable vane to the fulcrum, and the fulcrum of the lower variable vane is forward of the fulcrum of the upper variable vane. It is as a configuration.

Operation According to the present invention, since the variable blade provided at the hot air outlet can be rotated and the inclination angle thereof can be changed to change the blowing angle of the warm air according to the change of the heating capacity, the reach distance of the warm air can be changed. Becomes the same even if the heating capacity is changed,
The distribution of room temperature is less uneven, and more comfortable heating is possible. In addition, the presence of the lower variable vane smoothes the flow of warm air, and the effect of attracting the warm air whose direction is changed by the upper variable vane is added, and the warm air reaches farther as a whole. The comfortable space ratio is improved. Further, as is apparent from FIG. 2, the pivotal support of the lower variable vane is below and above the upper variable vane,
When the variable blade rotates and opens, the lower variable blade has a deeper shape. Therefore, the hot air is further attracted to the upper variable vanes, and the hot air travels further. Further, by locating the fulcrum of the lower variable vane in front of the fulcrum of the upper variable vane, when both variable vanes are closed, they are on the same plane in a substantially vertical state and have a good appearance. At this time, since the air outlet is almost completely covered, dust and the like will not enter the heat generating means and cause an abnormality.

Example Hereinafter, an example of the present invention will be described 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 body 1 which serves as heat generating means. 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 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. 3). 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.

Reference numeral 17 is an upper variable blade provided on the outlet frame 14 so as to be located above the warm air outlet 3, and its inner surface side is an arcuate surface 18. As shown in FIG. 3, the upper variable blade 17 is rotatable as shown by an arrow d by allowing a shaft 19 projecting at the lower ends of both ends thereof to penetrate through a supporting metal fitting A13 attached to the side plate 1a of the heater body. Reference numeral 20 denotes a linking cam provided on one of the bearings 19 of the upper variable vane 17, which has two pin shafts 21 and 22. 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. Compression spring 26 to move
It is linked via. And the first of the drive plates
Two notch grooves 24a, 24b are formed on the drive plate 24 side, and one pin shaft 21 of the linking cam 20 of the upper variable vane 17 is fitted into one notch groove 24a. 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 denotes a lower variable vane disposed below the upper variable vane 17, the pivot position of which is shorter than that of the upper variable vane 17 from the lower end of the variable vane and more than that of the upper variable vane 17. It's in front.

Fig. 4 shows the side opposite the support bracket A13.
Is a support bracket B, an upper variable blade lever 37 is provided on the other side of the upper variable blade 17, and a lower variable blade lever 38 is provided on the lower variable blade 35.
Is provided. 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 and 38a are inserted have an upper slot 39a and a lower slot 39b, respectively. Reference numeral 40 is a tension spring that links the upper side of the connecting plate 39 and the upper variable blade pin shaft 37a. 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.
The control unit for controlling 31 is constructed 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. The signal S ₅ variable vane drive unit 51 for controlling the rotation angle of the upper variable vane 17 on the basis of the signal S ₄
Is output to the motor 31.

FIG. 7 is a flowchart showing the processing state of the combustion control unit 51.

First, at step 65, the operation of the operation switch is determined.If the switch is turned on, at step 66 the combustion amount is calculated according to the difference between the room temperature and the set temperature, and at step 67 the same. The rotation speed of the blower 11 is calculated, and the pump frequency is calculated in the next step 68.
To output as combustion output. 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. 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 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. 2, and cover the hot air outlet 3.

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 in accordance with a predetermined sequence, and the convection blower 11 is rotated. Then, the variable vane driving unit 51 emits a signal S ₅ to drive the motor 31 and rotate the upper variable vane 17 to a predetermined angle.

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 amount of the convection blower, such as X in FIG. 2 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 vane 17 rotates, the connecting plate 39 and the pin shaft 37a of the upper variable vane lever 37 move the tension spring 4 as shown in FIG.
Since it is connected at 0, the connecting shaft 39 moves linearly downward. As a result, the pin shaft 38a of the lower variable blade lever 39 is rotated by being guided by the lower slot 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 hits the outlet frame 14 and stops moving, the tension spring 40 extends and the pin shaft 37a of the upper variable blade lever 37 slides in the slot 39a. 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 the upper variable blade 35 moves. When the lever 37 is at X, the lower variable blade lever is at the position of X ', and the warm air outlet is opened to the maximum.
Next, in the middle, the upper variable vane is at the Y position, but the upper variable vane lever 37 slides only in the slot 39a, so the position of the lower variable vane 35 is the same as X '. is there.

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 abutting above b, it will be lifted slightly.

As can be seen from the above, the upper variable vane is used during strong combustion and strong blast.
17 is substantially horizontal, and the lower variable vane 35 is also substantially horizontal. Therefore, the flow velocity is increasing as a whole, and the warm air reaches farther than the conventional one as shown in FIG.
And it becomes possible to improve comfort. Next, in the case of medium combustion and medium air blowing, it inclines slightly downward. Therefore, the flow of warm air is lower than that when it is strong, and the warm air is shown in FIG.
It becomes like this, and it will reach farther than the conventional one. Further, since the lower variable blades 35 are the same as those described above, the warm air is prevented from flowing too downward and the temperature of the floor surface is prevented from rising. Similarly, in the case of weak combustion and weak blast, the upper variable blade 17 inclines considerably downward, and accordingly, the lower variable blade 17
Since 35 also lifts up a little, warm air will flow along the floor like Z ″ in FIG. 9.

Therefore, even if the flow velocity of the warm air is low and 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.

Furthermore, the pivotal support position of the lower variable blade 35 is higher than that of the upper variable blade 17.
Since the distance from the lower end of the variable vane is shortened and it is located in front of the upper variable vane 17, the tip of the lower variable vane 35 is located deeper than the tip of the upper variable vane 17 between strong and weak. Will be. Therefore, the effect of attaching the upper variable blade 17 to the arcuate surface 18 is further enhanced, and the warm air flows downward, so that the comfort can be further improved.

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 of the combustion control unit 49 is empty, that is, the arrow in FIG. Rotate to the side opposite to a. As a result, the first and second
The drive plates 24 and 25 are lifted upward, the linkage cam 20 is rotated in the direction opposite to the arrow c, and the upper variable vane 17 is returned to its original state, that is, in a substantially vertical direction. And the lower variable wing 35
Since the connecting plate 39 connected to the upper variable blade 17 is lifted upward, it is urged by the torsion spring 43 and
While abutting above 39b, it is pivotally returned in a substantially vertical direction.

Here, the upper variable vane 17 has an arcuate surface 18 on one side to enhance the Coanda effect, and the lower variable vane 35 is thin to reduce the load on the motor. Therefore, if the fulcrum 17a of the upper variable blade and the fulcrum 35a of the lower variable blade are configured on the same vertical plane, the thickness of the upper and lower variable blades 17 and 35 is different, so that the front surfaces of the upper and lower variable blades are in the same plane in the stopped state. Not only will it not look good, but there is a risk that dust and the like will enter the combustion section through the gap.

Therefore, in the present invention, while the fulcrum 35a of the lower variable vane is located in front of the fulcrum 17a of the upper variable vane, the distance from the lower end of each variable vane is set to be shorter in the lower variable vane 35. In the stopped state, the outlet 3 is almost completely covered by the upper variable blade 17 and the lower variable blade 35, and the front surface thereof is flush, so that dust and the like can be prevented from entering the combustion section and the design can be improved. It can be very refreshing.

As described above, in the warm air heater of the present invention, the upper and lower variable blades of the hot air outlet are vertically moved in association with the change of the amount of warm air or the amount of heat generated by the heat generating means. The effect of smoothing the flow of warm air due to the presence of the lower variable vane and at the same time the effect of attracting the flow of warm air redirected by the upper variable vane is added. It reaches far away, and the comfortable space rate is improved accordingly.

Also, when the operation is stopped, the upper and lower variable blades are positioned in a substantially vertical direction, and the warm air outlet is closed in a flush state, so the appearance is neat and the appearance is greatly improved. It is possible to provide a warm air heater excellent in comfort, durability, appearance, and safety by preventing the cause of abnormal combustion from entering the combustion section.

[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 cross-sectional view of a main part thereof, and FIGS. 3 and 4 are enlarged perspective views of the main part. FIG. 6 is an enlarged side view of the same, FIG. 6 is a block diagram showing the same control unit, FIG. 7 is a flow chart showing operating states, FIG. 8 is an external perspective view, FIG. 9 is a sectional view showing operating states, and FIG. Is a cross-sectional view showing a conventional hot-air heater, and FIG. 11 is a cross-sectional view of the hot-air heater before modification. 1 ... Main body, 3 ... Warm air outlet, 4 ... Heat generating means, 11
...... Convection blower, 17 …… Upper variable blade, 35 …… Lower variable blade,
37, 38 …… Variable lever, 39 …… Coupling plate, 39a, 39b …… Oval hole, 40 …… Tension spring, 42,43 …… Torsion spring.

Claims (1)

[Claims] 1. A main body having a hot air outlet, heat generating means provided in the main body, and a convection blower for supplying warm air to the heat generating means to blow hot air from the hot air outlet. The rotatable upper and lower variable vanes vertically arranged at the hot air outlet and the upper variable vane 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. Along with this, a control unit for rotating the lower variable vane in a substantially horizontal direction is provided.The upper variable vane has an arcuate surface on the inner surface side, the lower portion thereof is pivotally supported, and the lower variable vane is fulcrumed from the lower end. Is shorter than the distance from the lower end of the upper variable blade to the fulcrum, and the fulcrum of the lower variable blade is located ahead of the fulcrum of the upper variable blade.