JP3485626B2 - Hot air heater unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater unit in which air heated by a heater is blown downward by a fan.

[0002]

2. Description of the Related Art Conventionally, a protective guard of a warm air heater unit is composed of a net-like body such as a lath net capable of increasing the opening ratio in order to smoothly suck and exhaust air by a fan (for example, Japanese Utility Model Publication No. 43-13032). However, since the mesh-like body is weak in strength, there is a problem that it is easily deformed when a user's foot or the like hits it. Also, in order to increase the strength, the protective frame is made of an iron plate, a large hole is formed in the center by press working, and a plurality of small holes are formed in the periphery,
There is one in which a net-like body is attached to a large hole formed in the center to form a protective guard (for example, Japanese Utility Model Publication No. 62-256).
No. 30), the aperture ratio is reduced in the structure in which the holes are formed in the iron plate, so that there is a problem that the flow of warm air becomes poor and radiant heat is blocked, so that the heating effect is reduced.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and an object thereof is to enhance the heating effect of the warm air heater unit. Further, increasing the strength of the warm air heater unit is also one of the problems.

[0004]

The present invention comprises a reflector, a motor, a fan driven by the motor, a ring-shaped heater, and a protective guard covering the lower surface of the fan and the heater. In a warm air heater unit having a structure in which the fan and the heater are concentrically arranged between the reflector and the protection guard, and the fan blows warm air in a direct downward direction, a reverse protruding downward on the lower surface of the protection guard. A frustoconical air intake / exhaust portion is provided concentrically with the heater, and a peripheral side surface of the intake / exhaust portion is formed of a plurality of wire rods and a lower surface is formed of a mesh body, and a plurality of wire rods constituting the peripheral side surface and the The net-like body forming the lower surface is connected via a ring-shaped connecting member, and the outer diameter of the ring-shaped connecting member is set smaller than the outer diameter of the ring-shaped heater. It is intended.

Further, the lower surface of the intake / exhaust portion is formed by a lath net, and the lath net is arranged so that the obliquely downwardly inclined pieces forming the lath net face toward the connecting portion between the warm air heater unit and the power cord. You may.

[0006]

According to the present invention, the inverted frustoconical air intake / exhaust portion projecting downward is provided concentrically with the heater on the lower surface of the protective guard as described above, and the peripheral side surface of the air intake / exhaust portion is constituted by a plurality of wires. Since the lower surface was composed of a mesh body,
It is possible to increase the opening ratio of the intake and exhaust parts, to efficiently perform heating with warm air and heating with radiant heat to enhance the heating effect, and to increase the strength of the intake and exhaust parts on the peripheral side surface. It is possible to increase it by the wire rod. Further, since the outer diameter of the ring-shaped connecting member that connects the plurality of wires forming the peripheral side surface and the net-like body forming the lower surface is set to be smaller than the outer diameter of the ring-shaped heater, the radiant heat of the ring-shaped heater is connected to the ring-shaped connection. The area blocked by the members can be reduced, the heating effect by radiant heat can be improved, and the central lower area of the ring-shaped connecting member where the radiant heat of the ring-shaped heater is easily blocked is heated by the downward warm air supplied by the fan. It becomes possible to supplement the reduction of the heating effect due to radiant heat.

Further, the lower surface of the intake / exhaust portion is constituted by a lath net, and the lath net is arranged so that the obliquely downwardly inclined pieces forming the lath net face toward the connecting portion between the warm air heater unit and the power cord. By doing so, downward warm air can be supplied toward the connection part of the power cord by the rectifying action of the lath net, and it is easy for the power cord to be connected / disconnected or the temperature setting operation, etc. It is possible to preferentially supply hot air in the direction of the connecting portion of the power cord.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The warm air heater unit 1 has a rectangular planar shape as shown in FIGS. 1 and 2, and a plywood heat shield plate 2 having a rectangular planar shape is arranged on the upper surface as shown in FIG. An iron plate reflector 3 having a rectangular planar shape is arranged on the lower surface thereof, a protective guard 4 having a rectangular planar shape is arranged on the lower surface, and a motor 5 is arranged in a space between the heat shield plate 2 and the reflecting plate 3. A fan 6 and a heater 7 are arranged in the space between the reflection plate 3 and the protective guard 4.

The reflecting plate 3 is formed by pressing as shown in FIG.
As shown in FIG. 2, a bulging portion 8 bulging downward is integrally formed in the central portion thereof, and as shown in FIGS. 2 to 4, an inclination having a downward slope toward the periphery so as to surround the bulging portion 8. The portion 9 is integrally formed in an annular shape, and the flat portion 10 is integrally formed in the circumferential direction from the lower end edge of the annular inclined portion 9. The four side surfaces around the reflection plate 3 are formed by side walls 11 that are formed so as to rise upward, and a flange portion 12 that extends outward is formed on the upper portion of each side wall 11. A motor housing space 13 for housing the motor 5 is formed between the heat shield plate 2 and the reflection plate 3 due to the presence of the bulging portion 8 of the reflection plate 3, and the reflection plate 3 is surrounded by the motor housing space 13. An annular surrounding space 14 is formed by the presence of the annular inclined portion 9, the flat portion 10 and the side wall 11. Since the motor housing space 13 and the surrounding space 14 are communicated with each other, the reflection plate 3 has a vertical cross section connecting the opposite portions of the inclined portion 9 with the bulging portion 8 interposed therebetween, as shown in FIGS. The substantially U-shaped laterally elongated duct portion 15 is integrally formed in the diagonal direction of the reflection plate 3. The strength of the reflection plate 3 can be increased by forming the laterally long duct portion 15 in the diagonal direction. On the lower surface of the bulging portion 8, that is, the lower surface of the laterally long duct portion 15, as shown in FIG. 4, a vent hole 17 that is located immediately below the coil 16 of the motor 5 and is open is formed.

The rotary shaft 18 of the motor 5 arranged and fixed in the motor housing space 13 penetrates the reflection plate 3 and projects downward, and the propeller-type fan 6 is attached to the rotary shaft 18. The fan 6 is configured to blow the air sucked from near the lower surface of the reflection plate 3 toward the position directly below the reflection plate 3 by the rotation of the motor 5.

On the lower surface of the reflection plate 3, as shown in FIG.
A ring-shaped heater 7 which is concentric with the fan 6 and the annular inclined portion 9 is attached. The heater 7 is composed of, for example, a quartz tube type lamp heater having an inner diameter larger than the outer diameter of the fan 6, and the support fittings 19, 2 are provided.
It is fixed to the lower surface of the oblong duct portion 15 by 0. The vertical relationship between the fan 6 and the heater 7 is set so that the fan 6 is slightly lower than the heater 7.

As shown in FIGS. 3 and 4, various electric parts for operating or controlling the motor 5 and the heater 7 are attached to the printed board 21 and the upper surface of the wide area flat portion 10 'of the reflection plate 3 is attached. It is located in. The temperature detecting element 22 which is a positive temperature coefficient thermistor for temperature detection, which is one of the electric components, shields the radiant heat of the heater 7 and the fan 6
Since it is arranged in the laterally long duct portion 15 on the back side of the support fitting 19 so as to be easily cooled by the wind generated by the rotation of the warm air heater unit 1, the influence of the heat trapped inside the warm air heater unit 1 is reduced. The temperature outside 1 can be detected accurately. In addition, a connector portion C to which a power cord for supplying power to the warm air heater unit 1 is detachably connected is provided at a central portion of one side of the warm air heater unit 1 adjacent to the wide area flat portion 10 'of the reflector. To position.

As shown in FIGS. 1, 3 and 5, the protective guard 4 covering the lower surface of the warm air heater unit 1 has a circular opening having a size equal to the outer diameter thereof at a position corresponding to the annular inclined portion 9. The guard frame 23 is made of an iron plate, and the intake / exhaust part 24 is attached to the circular opening so as to cover the lower surfaces of the fan 6 and the heater 7. The intake / exhaust portion 24 provided on the lower surface of the protective guard 4 so as to project downward is located on the annular peripheral side surface 25 forming an intake portion inclined downward from the periphery toward the center, and on the lower end surface of the annular peripheral side surface 25. A flat circular lower surface 26 that constitutes an exhaust part
It is formed into an inverted truncated cone shape by and. The annular peripheral side surface 25 as an air intake portion has a high aperture ratio so that the intake air to the fan 6 is not blocked and the radiant heat generated from the heater 7 is not blocked. .. is constructed by using the processed and arranged radially. The circular lower surface 26 serving as an exhaust portion is formed by using a lath net that is a net-like body in order to set a high aperture ratio so that the radiant heat generated from the heater 7 is not blocked and the air blown by the fan 6 is not obstructed. is doing. The annular peripheral side surface 25 and the circular lower surface 26 are welded and fixed to the upper surface of a ring-shaped iron connecting plate 28 having an outer diameter smaller than the outer diameter of the ring-shaped heater 7.

Explaining the intake / exhaust portion 24 in detail, the pre-pressed wire rods 27, which are cut into the same size, are arranged radially with a predetermined distance from the center, and the outer peripheral portions of the wire rods 27, 27 ... Two different ring-shaped wires 29, 30
Each of them is fixed by welding, and then processed into an inverted truncated cone shape by press working. And each wire 27, 27 ...
After arranging the inner peripheral portions of the respective parts on the upper surface of the ring-shaped connecting plate 28 at equal intervals, they are fixed to the ring-shaped connecting plate 28 by welding. After that, a proper position of the lath net forming the lower surface 26 is welded to the upper surface of the ring-shaped connecting plate 28 to fix and attach the lower surface 26. Here, in the lath net forming the circular lower surface 26, as shown in FIG. 3, the material forming the mesh is inclined obliquely downward to form a plurality of downward inclined pieces 26 ', 26' ... , Has a rectifying effect that changes the direction of the wind. Therefore, in order to send a part of the air blown downward by the fan 6 to the connector portion C side of the warm air heater unit 1, the plurality of inclined pieces 26 ′, 26 ′ face the connector portion C side. A lath net forming the lower surface 26 is attached. On the connector part C side of the warm air heater unit 1,
Since it is easy to connect and disconnect the power cord, or to set the temperature using a controller installed in the middle of the power cord, it is considered that the user is most likely to sit down when attached to a table or a roar. By supplying a part of the warm air in the direction, it becomes possible to preferentially heat the position where the user sits.

The periphery of the lath net constituting the lower surface 26 and the end edge portion of each wire member 27 constituting the peripheral side surface 25 are liable to have many burrs and the like, but the ring-shaped connecting plate 28.
Since it is covered by, it is possible to prevent injury to the user and enhance safety.

The intake / exhaust portion 24 is fitted into a circular opening provided on the lower surface of the guard frame body 23 from above, and some ends of the wire 27 are welded to the guard frame body 23 so that the guard frame body 23 is welded. It is attached and fixed to. The protective guard 4 assembled in this manner is completed by implanting heat-resistant microfibers on the entire surface thereof by electrical bonding, and flocking.

The protective guard 4 is formed by the guard frame 23.
The outer peripheral upper end of the heat shield plate 2 is applied to the lower side of the flange 12 portion of the reflection plate 3, and the heat shield plate 2 together with the reflection plate 3 is screwed.
Fixed to. With the protective guard 4 attached,
The upper outer peripheral edge of the air intake / exhaust portion 24, that is, the end portions of the ring-shaped wire rod 29 and the respective wire rods 27, 27 ...
Since it is sandwiched between the intake and exhaust parts 24 and the guard frame body 2,
The attachment state of 3 can be reinforced.

The warm air heater unit 1 constructed as described above is used in a table (or a yagura) as shown in FIG.
It is used by being attached to the central portion of the lower surface of the top surface 32 of 31. Then, in this state, a power cord is connected to the connector portion C to supply power to the warm air heater unit 1 to drive the motor 5,
When the heater 7 is energized, the motor 5 starts rotating the fan 6 and the heater 7 starts generating heat. Due to the rotation of the fan 6, the upper side of the fan 6 becomes a negative pressure state, so that the ambient air is sucked up above the fan 6. Most of the sucked air passes through the annular peripheral side surface 25 of the intake / exhaust portion 24, passes around the heater 7, and reaches the fan 6. Then, when passing around the heater 7, it is heated to be warm air. The heated air is blown downward by the fan 6 and passes through the circular lower surface 26 of the intake / exhaust portion 24 as shown by arrows in FIG.
The air is blown downward from the bottom surface of the.

Here, the annular peripheral side surface 25 constituting the intake portion of the intake / exhaust portion 24 is formed by arranging a plurality of wire rods 27, 27, ... Radially at equal intervals around the rotation shaft 18 of the motor. Therefore, the aperture ratio can be set large, and as a result, the intake air to the fan 6 can be made smooth, and the heater 7 is also concentric with the radiant heat emitted from the heater 7. More evenly. Further, since the circular lower surface 26 forming the exhaust portion of the intake / exhaust portion 24 is formed of a lath net, the aperture ratio can be set large, and as a result, the air blown by the fan 6 can be made smooth. Therefore, more radiant heat generated from the heater 7 can be passed. Therefore, even when the table 31 is used without a futon or the like, the space below the table 31 can be effectively heated by the warm air and the radiant heat.

The ring-shaped connecting plate 28 arranged concentrically below the ring-shaped heater 7 has an outer diameter smaller than that of the ring-shaped heater 7. It is possible to radiate the radiant heat of the heater 7 toward the lower side of the warm air heater unit 1 in a wide range. More preferably, if the outer diameter of the ring-shaped connecting plate 28 is set smaller than the inner diameter of the ring-shaped heater 7, as shown in FIG. 1, the ring-shaped heater 7 and the ring-shaped connecting plate 28 have a planar shape. It becomes possible to radiate the radiant heat of the ring-shaped heater 7 toward the lower side of the warm air heater unit 1 in a wider range without overlapping. The ring-shaped connecting plate 28
The ring-shaped connecting plate 2 in which the radiant heat of the heater 7 is blocked by the
In the lower central portion of 8, the heating capacity due to radiant heat is reduced, but since warm air that has passed through the circular lower surface 26 is intensively supplied to that part, the shortage of heating due to radiant heat should be compensated by heating with warm air. You can

The lath net constituting the circular lower surface 26 is
As shown in FIG. 3, since a plurality of slanting downwardly inclined pieces 26 ', 26' ... Constituting the mesh are attached so as to face the connector portion C side of the warm air heater unit 1, they are indicated by arrows in FIG. It is possible to preferentially supply a part of the warm air toward the connector part C side where the user is most likely to sit, and preferentially heat the position where the user sits. Is possible.

Further, the intake / exhaust portion 24 projecting downward from the lower surface of the protective guard 4 has an inverted truncated cone shape, and the peripheral side surface 25 thereof has a plurality of wire rods 2 which are stronger than the mesh body.
Since it is formed of 7, 27, ..., it is possible to maintain sufficient strength against the force applied from the lower side. Further, the lower surface of the intake / exhaust portion 24 is configured by using a mesh body having a lower strength than the wire rod, but since the area is about ¼ of the entire area of the intake / exhaust portion 24, the strength is not lowered. Can be kept to a minimum.

[0023]

As described above, according to the present invention, the intake / exhaust portion having the shape of an inverted truncated cone protruding downward is provided concentrically with the heater on the lower surface of the protective guard as described above, and the peripheral side surface of the intake / exhaust portion is formed by a plurality of wires. Since it is configured and the lower surface is configured by a mesh body, it is possible to increase the opening ratio of the intake and exhaust portions, it is possible to efficiently perform heating by warm air and heating by radiant heat, and it is possible to enhance the heating effect, The strength of the intake / exhaust portion can be increased by the plurality of wire rods arranged on the peripheral side surface. Further, since the outer diameter of the ring-shaped connecting member that connects the plurality of wires forming the peripheral side surface and the net-like body forming the lower surface is set to be smaller than the outer diameter of the ring-shaped heater, the radiant heat of the ring-shaped heater is connected to the ring-shaped connection. The area blocked by the members can be reduced, the heating effect by radiant heat can be improved, and the central lower area of the ring-shaped connecting member where the radiant heat of the ring-shaped heater is easily blocked is heated by the downward warm air supplied by the fan. It becomes possible to supplement the reduction of the heating effect due to radiant heat.

Further, the lower surface of the intake / exhaust portion is constituted by a lath net, and the lath net is arranged so that the obliquely downwardly inclined pieces constituting the lath net face toward the connecting portion between the warm air heater unit and the power cord. By doing so, downward warm air can be supplied toward the connection part of the power cord by the rectifying action of the lath net, and it is easy for the power cord to be connected / disconnected or the temperature setting operation, etc. It is possible to preferentially supply hot air in the direction of the connecting portion of the power cord.

[Brief description of drawings]

FIG. 1 is a bottom view of a warm air heater unit showing an embodiment of the present invention.

FIG. 2 is a bottom view of the warm air heater unit with the protective guard removed according to the embodiment.

FIG. 3 is a cross-sectional view taken along the line A-A ′ in FIG.

FIG. 4 is a sectional view taken along the line B-B ′ of FIG.

FIG. 5 is a side view of the protective guard according to the embodiment.

FIG. 6 is a partially cutaway side view showing a usage state in which the warm air heater unit is attached to a table.

[Explanation of symbols]

1 Hot air heater unit 2 heat shield 3 reflector 4 protective guard 5 motor 6 fans 7 heater 23 Guard frame 24 Intake and exhaust 25 Annular peripheral side 26 Round bottom surface 26 'inclined piece 27 wire rod 28 Ring-shaped connecting plate C connector part

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuji Morimoto 3 201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (56) Reference JP-A-61-289270 (JP, A) 3-23756 (JP, U) Actually open 62-105433 (JP, U) Actually open 59-86549 (JP, U) Actually public 43-13032 (JP, Y1) Actually public 62-25630 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24H 3/04

Claims (2)

(57) [Claims] 1. A reflection plate, a motor, a fan driven by this motor, a ring-shaped heater, and a protection guard covering the lower surfaces of the fan and the heater, and between the reflection plate and the protection guard. In the warm air heater unit in which the fan and the heater are concentrically arranged and hot air is blown by the fan in a direct downward direction, an inverted frustoconical intake / exhaust portion protruding downward to the lower surface of the protection guard is provided. The heater is provided concentrically with the heater, and the peripheral side surface of the intake / exhaust portion is composed of a plurality of wires and the lower surface is composed of a mesh body, and the plurality of wire materials forming the peripheral side surface and the mesh body forming the lower surface are ring-shaped. And a ring-shaped connecting member, the outer diameter of the ring-shaped connecting member is set to be smaller than the outer diameter of the ring-shaped heater. To. 2. The lath net is arranged such that the lower surface of the intake / exhaust portion is formed of a lath net, and the obliquely downwardly inclined pieces constituting the lath net are directed toward the connecting portion between the warm air heater unit and the power cord. The warm air heater unit according to claim 1, wherein