JP7524126B2 - Warm air heating device - Google Patents

Description

This invention relates to a warm air heating device, and in particular to a warm air heating device equipped with movable louvers.

In the past, this type of device provided a first movable louver and a second movable louver above and below the hot air outlet, and by adjusting the position of the first movable louver and the second movable louver within different swing angle ranges, the hot air blown out from the hot air outlet was controlled, preventing an excessive rise in temperature on the floor surface and eliminating uneven temperatures in the room, thereby heating the user evenly from the feet to the shoulders. (For example, Patent Document 1)

JP 2018-200152 A

However, in this conventional system, if the second movable louver located below the warm air outlet is pointed too far downward, the warm air will hit the floor surface directly and cause the floor surface to overheat, so the second movable louver is pointed slightly downward from the horizontal direction.
As a result, the warm air guided by the second movable louver is blown out slightly downward from the horizontal direction so as not to hit the floor, and the first movable louver provided above the warm air outlet is directed downward to prevent the warm air from floating upward, and the warm air guided by the first movable louver is blown out so as to suppress the warm air guided by the second movable louver from above, allowing the warm air to reach far away.

However, if the downward angle of the first movable louver is increased in order to better suppress the warm air guided by the second movable louver with the warm air guided by the first movable louver, the tip of the second movable louver will be positioned in front of the tip of the first movable louver by a length t, as shown in Figure 6, and the warm air guided by the first movable louver will be guided by the tip of the second movable louver and will be guided horizontally instead of downward, resulting in a problem that the distance the warm air can reach will not increase even if the downward angle of the first movable louver is increased.

In order to solve the above problem, according to claim 1 of the present invention, there is provided a hot air heating device for heating by blowing out hot air, comprising: an appliance body; a combustion unit installed within the appliance body; a convection fan for blowing out hot air; a hot air outlet for blowing out hot air; a control unit for controlling operation; a movable louver disposed at the hot air outlet; and a swinging device for swinging the movable louver within a predetermined swing angle range, the movable louvers comprising a first movable louver movable about a first rotation axis and a second movable louver disposed below the first movable louver and movable about a second rotation axis, and a swinging angle of the first movable louver when the first movable louver and the second movable louver are opened. the length from the tip of the first movable louver to the first rotation axis is set longer than the length from the tip of the second movable louver to the second rotation axis, the predetermined swing angle range differs between the first movable louver and the second movable louver, the lower limit angle of the predetermined swing angle range of the first movable louver is set smaller than the lower limit angle of the predetermined swing angle range of the second movable louver, and the length from the tip of the first movable louver to the first rotation axis is set such that the tip of the first movable louver is always located forward of the tip of the second movable louver while the first movable louver and the second movable louver are each swinging within the predetermined swing angle range .

In addition, in claim 2, the axial distance between the first rotation axis and the second rotation axis is the sum of the length from the tip of the first movable louver to the first rotation axis when the lower parts of the first movable louver and the second movable louver below the rotation axis are moved forward to change from a closed state to an open state, and the length from the rear end of the second movable louver to the second rotation axis.

In addition, in claim 3, the axial distance between the first rotation axis and the second rotation axis is the sum of the length from the rear end of the first movable louver to the first rotation axis when the upper parts of the first movable louver and the second movable louver above the rotation axis are moved forward to change from a closed state to an open state, and the length from the tip of the second movable louver to the second rotation axis.

According to claim 1 of the present invention, when the first movable louver and the second movable louver are in an open state, the length from the tip of the first movable louver to the first rotation shaft is set to be longer than the length from the tip of the second movable louver to the second rotation shaft , the predetermined swing angle range differs between the first movable louver and the second movable louver, a lower limit angle of the predetermined swing angle range of the first movable louver is set to be smaller than a lower limit angle of the predetermined swing angle range of the second movable louver, and The length at is set so that the tip of the first movable louver is always positioned forward of the tip of the second movable louver while the first movable louver and the second movable louver are each swinging within the specified swing angle range. Therefore, even if the tip of the first movable louver is facing downward, the tip of the first movable louver is positioned forward of the tip of the second movable louver below the first movable louver, so that the warm air guided by the second movable louver can be contained by the warm air guided by the first movable louver, allowing the warm air to reach farther.

In addition, the ratio of the dimension between the front ends of the first and second movable louvers to the dimension between the rear ends of the louvers when the first and second movable louvers are in the open state can be made smaller than before, thereby increasing the speed of the hot air being blown out and allowing the hot air to reach a greater distance.

Furthermore, according to claim 2, the axial distance between the first rotating shaft and the second rotating shaft is set to the sum of the length from the tip of the first movable louver to the first rotating shaft when the parts below the rotating shafts of the first movable louver and the second movable louver are moved forward to change from a closed state to an open state, and the length from the rear end of the second movable louver to the second rotating shaft. Therefore, when the parts below the rotating shafts of the first movable louver and the second movable louver are moved forward to change from a closed state to an open state, the warm air outlet can be fully closed without the first movable louver and the second movable louver coming into contact with each other when moved from an open state to a closed state.

Furthermore, according to claim 3, the axial distance between the first rotating shaft and the second rotating shaft is set to the sum of the length from the rear end of the first movable louver to the first rotating shaft when the upper parts of the first movable louver and the second movable louver above the rotating shaft are moved forward to change from a closed state to an open state, and the length from the tip of the second movable louver to the second rotating shaft. Therefore, when the upper parts of the first movable louver and the second movable louver above the rotating shaft are moved forward to change from a closed state to a closed state, the warm air outlet can be fully closed without the first movable louver and the second movable louver coming into contact with each other when moved from an open state to a closed state.

1 is an external perspective view of a warm air heating device showing an embodiment of the present invention; FIG. FIG. 4 is a perspective view showing the movable louver in the closed state. FIG. 4 is a perspective view showing the movable louver in the fixed position. FIG. FIG. 13 is a schematic side view showing a movable louver in a conventional fixed position.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in Figs. 1 and 2, a hot air heating device 1 according to this embodiment is a heating device that blows out hot air to raise the temperature inside a room.

As shown in Figure 2, the warm air heating device 1 comprises an appliance body 11, a combustion section 2 that burns fuel oil, a convection fan 3 that blows out warm air, a warm air outlet 4, a warm air outlet frame 5, a movable louver 6, an oscillating device 8 that oscillates the movable louver 6 within a predetermined oscillation angle range, and a control section 9 that controls operation.
For ease of explanation, the warm air heating device 1 is referred to as having left and right, front and rear, and up and down directions as viewed from the user.

1, the device body 11 includes a front panel 11a, an operation section 12 in which various switches are arranged, and a liquid crystal panel 13 that displays operation contents, etc. The operation section 12 includes an operation switch 12a, a louver operation switch 14, and various other switches.
The louver operation switch 14 is a switch that gives a command to the control unit 9 to swing the movable louver 6 within a specified swing angle range.

The combustion section 2 is a device that burns fuel oil, and is equipped with a vaporizer 21 that vaporizes the fuel oil, a vaporization heater (not shown) that heats the fuel oil to vaporize it, an igniter (not shown) that ignites the fuel oil by spark discharge, a burner 22 that burns the vaporized fuel oil such as petroleum, a combustion tube 23 that forms a combustion space, a combustion fan 24 that blows combustion air to the burner 22, and an air duct 25.

?The convection fan 3 is attached to the hot air intake on the back via a fan guard 31. An air blower box 32 is arranged from the convection fan 3 to the hot air outlet 4. The air blower box 32 has an air blower box opening 33 on the front, and guides the hot air blown by the convection fan 3 from the air blower box opening 33 to the hot air outlet 4.

The hot air outlet 4 is an opening that blows hot air forward toward the room, and is provided in the front panel 11a.
As shown in FIG. 4 , the hot air outlet frame 5 is disposed so as to surround the hot air outlet 4 .
The hot air outlet frame 5 includes a pair of side plates 51 and 52, a lower plate 53, and an upper plate 54.

The pair of side panels 51, 52 includes a left panel 51 disposed to the left of the hot air outlet 4, and a right panel 52 disposed to the right. The bottom panel 53 covers and closes the bottom of the hot air outlet 4. The top panel 54 covers and closes the top of the hot air outlet 4.

The movable louvers 6 are arranged at the hot air outlet 4 and include a first movable louver 61 arranged at the upper stage and a second movable louver 62 arranged below the first movable louver 61.
In the following description, the movable louvers 6 (61, 62) will be collectively referred to as the movable louvers 6 when there is no need to distinguish between the first movable louvers 61 and the second movable louvers 62.

The movable louvers 6 have a closed state shown in FIG. 3, a fixed position shown in FIG. 4 in which they blow warm air in a predetermined stationary position, and a movable position in which they are swung within a predetermined swing angle range.
The closed state shown in Fig. 3 is a state in which operation is stopped. The fixed position shown in Fig. 4 is a state in which the movable louvers 6 are fixed at a predetermined angle and operated. The movable position is a position in which a rocking motion (swing motion) is performed.

When the combustion flame power of the combustion section 2 (see FIG. 2) is "strong," the angle of the movable louvers 6 in the fixed position is, for example, 71 degrees for the first movable louver 61 and 83 degrees for the second movable louver 62. Also, when the combustion flame power of the combustion section 2 (see FIG. 2) is "medium to weak," the first movable louver 61 is also 71 degrees and the second movable louver 62 is 83 degrees.

When the combustion power is "strong", the oscillation angle range for the oscillation operation of the warm air heater 1 is 85 to 64 degrees for the first movable louver 61 and 83 degrees for the second movable louver 62. The oscillation angle refers to the angle of the movable louver 6 relative to the vertically downward direction, and the specified oscillation angle range includes 0 degrees. When the combustion power is "medium to weak", the oscillation angle range is 85 to 52 degrees for the first movable louver 61 and 83 to 69 degrees for the second movable louver 62.

As shown in FIG. 4, the swinging device 8 includes a first shaft 81 that supports the first movable louver 61 on a pair of side panels 51, 52, a second shaft 82 that supports the second movable louver 62 on a pair of side panels 51, 52, a swing angle restriction mechanism 83 that restricts the swing angle range of the movable louver 6 (61, 62), a drive unit 84 that swings the movable louver 6, and a photosensor 90 that is a detection means that detects when the movable louver 6 has reached a predetermined reference position.

When the downward inclination angle of the first movable louver 61 is increased while the movable louvers 6 are movable and the hot air outlet 4 is open, as shown in FIG. 5, the length from the tip of the first movable louver 61 to the first axis 81 is A, the length from the rear end to the first axis 81 is B, and the length from the tip of the second movable louver 62 to the second axis 82 is a and the length from the rear end to the second axis 82 is b. The length A from the tip of the first movable louver 61 to the first axis 81 is longer than the length a from the tip of the second movable louver 62 to the second axis 82.

As a result, even if the first movable louver 61 is tilted at the same angle as the conventional one shown in Figure 6, the tip of the first movable louver 61 is located forward of the tip of the second movable louver 62, and the warm air guided downward by the first movable louver 61 reaches further forward than the conventional first movable louver 61 shown in Figure 6, so the warm air guided by the second movable louver 62 can reach a greater distance without floating up.

In addition, the length A from the tip of the first movable louver 61 to the first axis 81 is set to a length that is always located forward of the tip of the second movable louver 62 within the swing angle range of the first movable louver 61. Therefore, when a movable posture is selected by the user, the first movable louver 61 and the second movable louver 62 each swing within a predetermined swing angle range. During the swing, as shown in FIG. 5, the tip of the first movable louver 61 is always located forward of the tip of the second movable louver 62 by a length T. The hot air guided downward by the first movable louver 61 always holds down the hot air guided by the second movable louver 62 from above, preventing the hot air from floating up, and allowing the hot air to reach a greater distance.

The hot air blown forward from the air blower box opening 33 in front of the air blower box 32 passes through the hot air outlet 4 from the air blower box opening 33 and is blown forward of the appliance body 11. As shown in FIG. 5, the length A from the tip of the first movable louver 61 to the first axis 81 is longer than the length a from the tip of the second movable louver 62 to the second axis 82, so that the axial distance M from the first axis 81 to the second axis 82 is longer than the axial distance m from the conventional first axis 181 to the second axis 182 shown in FIG. 6.

As a result, the range of distance D between the rear end of the first movable louver 61 and the rear end of the second movable louver 62 includes the hot air passing near the upper end of the air blower box opening 33, and the hot air near the upper end of the air blower box opening 33 also passes under the first movable louver 61, thereby increasing the amount of hot air guided downward by the first movable louver 61 and preventing the hot air guided by the second movable louver 62 from floating up, allowing the hot air to reach a greater distance.

In addition, by making the length A from the tip of the first movable louver 61 to the first axis 81 longer than the length a from the tip of the second movable louver 62 to the second axis 82 and by making the axial distance M from the first axis 81 to the second axis 82 longer than the conventional axial distance m shown in FIG. 6, when the movable louvers 6 are moved to open the hot air outlet 4, the distance between the tip of the first movable louver 61 and the second movable louver 62 relative to the distance D between the rear end of the first movable louver 61 and the rear end of the second movable louver 62 is The ratio of the distance E between the tip of the first movable louver 161 and the tip of the second movable louver 162 to the distance d between the rear end of the first movable louver 161 and the rear end of the second movable louver 162 in the conventional arrangement shown in FIG. 6 is smaller than the ratio of the distance e between the tip of the first movable louver 161 and the tip of the second movable louver 162. In other words, since the hot air can be more smoothly throttled compared to the conventional arrangement shown in FIG. 6, the speed of the hot air blowing out from between the tip of the first movable louver 61 and the tip of the second movable louver 62 increases, and the hot air can reach even farther.

??The first shaft 81 and the second shaft 82 are each arranged along the left-right direction. As a result, the first movable louver 61 swings and rotates in the up-down direction around the first shaft 81 arranged along the left-right direction. The second movable louver 62 swings and rotates in the up-down direction around the second shaft 82 arranged along the left-right direction.

Furthermore, as in this embodiment, when the movable louvers 6 are in a vertical position blocking the hot air outlet 4, and the part of the movable louvers 6 below the first axis 81 and the second axis 82 protrudes forward to open the hot air outlet 4, the sum of the length A from the tip of the first movable louver 61 to the first axis 81 and the length b from the rear end of the second movable louver 62 to the second axis 82 is set to be the same as the axial distance M from the first axis 81 to the second axis 82, so that the first movable louvers 61 and the second movable louvers 62 do not overlap, and the hot air outlet 4 can be blocked without impairing the appearance even if the first movable louvers 61 and the second movable louvers 62 are of different sizes.

In addition, unlike this embodiment, when the movable louvers 6 are in a vertical position blocking the hot air outlet 4 and the part above the first axis 81 and the second axis 82 of the movable louvers 6 protrudes forward to open the hot air outlet 4, the sum of the length B from the rear end of the first movable louver 61 to the first axis 81 and the length a from the tip of the second movable louver 62 to the second axis 82 is set to be the same as the axial distance M from the first axis 81 to the second axis 82, so that the first movable louvers 61 and the second movable louvers 62 do not overlap, and the hot air outlet 4 can be blocked without impairing the appearance even if the first movable louvers 61 and the second movable louvers 62 are of different sizes.

The operation of the warm air heating device 1 according to the embodiment of the present invention configured as above will now be described.
The control unit 9 starts the heating operation when the operation switch 12a is operated by a user (not shown). At this time, the user can select a predetermined fixed posture or a swinging operation, which is a movable posture that swings within a predetermined swing angle range, by using the louver operation switch 14.

??With this configuration, depending on the preference of the user of the warm air heating device 1, the torso of the body can be heated preferentially by fixing the movable louvers 6 in a fixed position, or the user can be evenly heated from the feet to the shoulders by using the rocking motion.

When a fixed position is selected by the user, the control unit 9 moves the movable louvers 6 from the closed state (FIG. 3) to a predetermined fixed position such that the portions of the movable louvers 6 below the first and second axes 81 and 82 protrude forward. Specifically, in the fixed operation when the combustion flame power is "high," the first movable louver 61 is moved to 71 degrees, and the second movable louver 62 is moved to 83 degrees.

At this time, the tip of the first movable louver 61 is positioned further forward than the tip of the second movable louver 62, so that the warm air guided downward by the first movable louver 61 reaches further forward than the conventional first movable louver 61, and therefore the warm air guided by the second movable louver 62 can reach a greater distance without floating up.

In addition, when a movable position is selected by the user, the control unit 9 starts the swinging operation of the movable louvers 6, swinging the first movable louver 61 and the second movable louver 62 within a predetermined swing angle range.

The oscillating action differs depending on whether the combustion power of the burner 22 is "strong" or "medium to weak." When the combustion power is "strong," the movable louver 6 starts from a predetermined fixed position and moves upward, and when it reaches the upper limit position, the photosensor 90 detects that it has reached the upper limit position (see FIG. 4).
Thereafter, the swing cycle is repeated, in which the swing is downwardly swung from the upper limit position to the lower limit position and then returned to the predetermined fixed position at the start.

Since the tip of the first movable louver 61 is always positioned forward of the tip of the second movable louver 62 from the beginning to the end of one cycle of this rocking motion, the hot air guided downward by the first movable louver 61 can reach a greater distance by preventing the hot air guided by the second movable louver 62 from floating up from the beginning to the end of one cycle of this rocking motion.

2 Combustion section 3 Convection fan 4 Hot air outlet 6 Movable louver 8 Oscillating device 9 Control section 11 Appliance body 61 First movable louver 62 Second movable louver 81 First axis (first rotation axis)
82 Second axis (second rotation axis)

Claims (3)

A hot air heating device that blows out hot air for heating, the hot air heating device comprising: an appliance body; a combustion unit installed within the appliance body; a convection fan that blows out hot air; a hot air outlet that blows out hot air; a control unit that controls operation; a movable louver disposed at the hot air outlet; and a swinging device that swings the movable louver within a predetermined swing angle range, the movable louvers comprising a first movable louver that is movable around a first rotation axis, and a second movable louver that is disposed below the first movable louver and is movable around a second rotation axis, and a distance from a tip of the first movable louver to the first rotation axis when the first movable louver and the second movable louver are in an open state is a length longer than the length from the tip of the second movable louver to the second rotation shaft , the specified swing angle range is different between the first movable louver and the second movable louver, the lower limit angle of the specified swing angle range of the first movable louver is set smaller than the lower limit angle of the specified swing angle range of the second movable louver, and the length from the tip of the first movable louver to the first rotation shaft is such that the tip of the first movable louver is always positioned forward of the tip of the second movable louver while the first movable louver and the second movable louver are each swinging within the specified swing angle range . The warm air heating device according to claim 1, characterized in that the axial distance between the first rotating shaft and the second rotating shaft is the sum of the length from the tip of the first movable louver to the first rotating shaft when the lower parts of the first movable louver and the second movable louver below the rotating shaft are moved forward to change from a closed state to an open state, and the length from the rear end of the second movable louver to the second rotating shaft. The warm air heating device according to claim 1, characterized in that the axial distance between the first rotating shaft and the second rotating shaft is the sum of the length from the rear end of the first movable louver to the first rotating shaft when the upper parts of the first movable louver and the second movable louver above the rotating shaft are moved forward from the closed state to the open state, and the length from the tip of the second movable louver to the second rotating shaft.

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