JP2004251494A - Heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a conventional heater for taking warmth without covering by bedding etc. provided with a heating element which is built in a cylindrical strut provided on a lower side of a table top that temperature distribution of heat radiation and hot air becomes uneven. <P>SOLUTION: This heater is structured by forming a second inner space 16 in a cylindrical shape between two first reflection panels 17 in the hollow strut 4 so that air flow for passing the second inner space 16 is discharged to a lower part of a heating space 24 in a concentrated manner. In addition, in this heater, temperature distribution in the heating space is made even by not providing a heat insulation material inside a side wall face having an outlet 27 of radiation heat of the strut 4 and by concentrating heat radiation in four or more discharge port directions of all around the strut by the first reflection panels 17 and second reflection panels 19. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heater having a built-in heating element disposed below a table top.
[0002]
[Prior art]
A heating device (hereinafter, referred to as a heater) that provides a heating element below a top plate such as a desk or a table and that warms the feet of people sitting around the table has been conventionally used as a heating device such as a horikotatsu or a similar heating device. ing. In a first conventional example of such a heater (see, for example, Patent Document 1), a heating element such as an electric heater is provided in an upper space in a hollow column supporting a table top (hereinafter, table top). Built-in. An opening is formed below the heating element of the support column, and a downward louver having an angle set so that radiant heat from the heating element is directly applied to the floor surface is provided in the opening. Inside the louver, there is provided an inclined surface which is inclined downward from the center toward the louver, and a fan is provided between the inclined surface and the table top. With this configuration, the radiant heat from the heating element is directly applied to the floor, and the fan discharges warm air toward the floor.
[0003]
In the heater of the second conventional example (see, for example, Patent Document 2), a heating element is provided inside a hollow column supporting a table top plate, and a substantially arc-shaped reflecting plate is provided above the heating element. I have. A louver with a slope descending from the inside to the outside is provided on the side of the hollow column to prevent the light from the heating element from directly entering the eyes of seated people and to reduce the radiant heat of the heating element to the floor. Radiating towards.
A third conventional heater will be described with reference to FIG. 8 showing a vertical cross section. The top plate 61 of the table 60 is supported by a cylindrical column 51 having a square cross section and fixed to a base plate 62. A central support 53 is provided inside the column 51. Two rod-shaped heating elements 54 are vertically arranged on the central support 53. A plurality of suction holes 52 are provided in the upper part of the support column 51, and a plurality of discharge ports 56 are provided in the lower part. A large number of holes 65 are formed in portions of the support column 51 excluding the upper and lower portions. Many holes 67 are also formed in the central support 53. A fan 50 is provided in an upper portion of the inside of the support column 51, and air is sucked from an inlet 52 as shown by an arrow, and is heated by a heating element 54 and discharged from an outlet 56. Radiation heat from the heating element 54 is radiated to the outside through the holes 67 and 65 (see Patent Document 3).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 64-529 [Patent Document 2]
Japanese Utility Model Publication No. 1-26961 [Patent Document 3]
Japanese Utility Model Publication No. 8-1411
[Problems to be solved by the invention]
In the conventional example described in Patent Literature 1 or Patent Literature 2, since the louver having the inclined surface descending from the central portion in the column toward the outer surface is provided, the radiant heat from the heating element is directed downward instead of in the horizontal direction. Radiated. Therefore, heat radiation in the vertical direction becomes non-uniform in the space outside the column. Since the hot air is also discharged downward by the downward louvers, the temperature of the lower portion is more likely to rise than the temperature of the upper portion, and becomes uneven.
In the conventional example described in Patent Literature 3, the radiant heat from the heating element 54 is radiated to the external space through both the holes 67 and 65 of the central support 53 and the column 51, so that the radiant heat radiated to the outside is reduced. Reduced and less effective radiant heat on warming people. Regarding the distribution of the radiant heat around the column 51, the surface of the column 51 close to the heating element 54, that is, the radiant heat in the horizontal direction in the drawing is strong. However, the radiation heat in other directions is weak. Therefore, the heating effect around the column 51 becomes uneven. Further, since the warm air blows out from the hole 56 at the lower portion of the column 51, the warm air is concentrated in the space near the lower end portion of the column 51, and the heating effect is biased to the lower portion and becomes uneven.
An object of the present invention is to provide a heater in which the temperature distribution in a heating space around the heater becomes uniform.
[0006]
[Means for Solving the Problems]
The heater of the present invention has a table top plate attached to an upper end, a bottom plate attached to a lower end, a plurality of suction ports near the table top plate, and a plurality of discharge ports near the bottom plate, And a cylindrical support having a plurality of holes between the suction port and the discharge port,
An inner top plate having a plurality of first openings, opposed to the table top plate at a predetermined interval, and provided to form a first space between the inner top plate and the table top plate;
A plurality of second openings are provided in the internal space of the support so as to face the inner top plate at a predetermined interval and to form a second space between the inner top plate and the inner top plate. Middle plate,
A third space is formed opposite the bottom plate at a predetermined interval, a third space is formed between the bottom plate and the bottom plate, and a first internal space is formed between the support and the bottom plate. The inner bottom plate,
The pillar is disposed substantially vertically between the middle top plate and the inner bottom plate so as to form a second inner space at the center of the first inner space, and a portion close to the inner bottom plate A first reflector having a third opening,
A plurality of rod-shaped heating elements provided substantially vertically in the first internal space along the first reflector so that the longitudinal direction is substantially vertical;
A second reflector provided between the heating element and an inner wall surface of the support column at a predetermined distance from the heating element, and a second reflector provided in the second space to generate a downward airflow; Equipped with an electric fan,
The first opening, the second opening, and the first internal space, which connect the air sucked into the first space from the suction port by the rotation of the electric fan to the second space, By sequentially passing through, the heating element heats and discharges from the discharge port and the hole, and the radiation reflected by the first and second reflectors is radiated from the hole to the outside of the cylindrical support. It is characterized by the following.
[0007]
According to the present invention, holes for emitting warm air and radiant heat are formed in the same height range as the heating element on the side surface of the column 4. Further, the first and second reflectors are arranged so that radiant heat from the heating element is easily emitted in the horizontal direction. Thus, the radiant heat is uniformly radiated at the vertical position on the side surface of the column. Since the radiant heat to the lower portion of the column is smaller than that of the upper portion, the airflow passing through the second internal space is discharged from the lower discharge port, so that the unevenness in the temperature of the lower portion of the heating space is improved and the entire heating space is improved. The temperature distribution can be made uniform.
A plurality of fourth openings are formed in the first reflection plate forming the second internal space.
[0008]
An air guide plate protruding obliquely upward in the second internal space is provided near the fourth opening.
The heating element and at least one of the first and second reflectors provided at a predetermined distance from the heating element are provided at a predetermined angle from a vertical direction.
The predetermined angle is an angle selected from a range of 1 to 5 degrees.
The support is a hollow cylinder having a polygonal cross section, and has a plurality of discharge ports formed on at least two arbitrary side surfaces, respectively. The radiant heat of one heating element is transferred to the first reflector and the second reflector. The reflection plate reflects light toward holes formed in the at least two side walls.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.
[0010]
<< Embodiment 1 >>
First Embodiment A heater according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a side sectional view of a heater according to Embodiment 1 of the present invention. FIG. 2 is a side cross-sectional view of the same heating device, in which the direction in which radiant heat is emitted is indicated by arrowed heat radiation d, and the direction in which warm air is emitted is indicated by arrowed airflow a. Arrows marked "d, a" indicate that both radiant heat and hot air are emitted. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and the distribution of radiant heat around the column 4 is indicated by an arrow of heat radiation d. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and the direction of hot air blowing around the column 4 is indicated by an arrow of the airflow a.
[0011]
In FIGS. 1 to 4, the plate-like table top 1 is supported on a plate-like bottom plate 2 by an octagonal cylindrical support 4 in which the bottom surface is alternately arranged with long sides and short sides. I have. The inside of the support column 4 is partitioned by three partition plates, which are substantially parallel to the table top plate 1, the inner top plate 5, the middle top plate 8, and the inner bottom plate 11. The space between the table top 1 and the inner top plate 5 is called a first space 6, and the space between the inner top plate 5 and the middle top plate 8 is called a second space 9. A fan 20 is provided in the second space 9. The shaft of the fan 20 passes through the inner top plate 5 and is connected to a motor 21 provided in the first space 6. By arranging the motor 21 in the first space 6, the influence of heat can be avoided as will be described later in detail. The space between the middle top plate 8 and the inner bottom plate 11 is called a first internal space 3, and the space between the inner bottom plate 11 and the bottom plate 2 is called a third space 12. The first interior space 3 is the widest and the third space is the narrowest.
[0012]
A plurality of suction ports 22 are formed on the wall surface of the column 4 surrounding the first space 6. A plurality of first openings 7 are formed in the inner top plate 5. The middle top plate 8 has a plurality of second openings 10 formed therein. No opening is formed in the inner bottom plate 11. In the first internal space 3 between the middle ceiling plate 8 and the inner bottom plate 11, a pair of inner support plates 13 facing each other is provided while keeping a narrow gap on the inner wall surface of the column 4. Each inner support plate 13 is a narrow plate-shaped member, and a pair of holders 15 for holding a rod-shaped heating element 14 is provided on the inner side surface. The heating element 14 is held by the holder 15 so that the longitudinal direction is substantially vertical. A pair of first reflectors 17 are provided substantially vertically at positions near the center axis of the support 4 at a predetermined distance from each heating element 14. The first internal space 3 is divided into three spaces by the pair of first reflecting plates 17 to form a second internal space 16 which is a space including the center axis C of the support 4. A plurality of third openings 18 are formed in a portion near the inner bottom plate 11 below the first reflection plate 17. Between each heating element 14 and the inner support plate 13, a mountain-shaped second reflecting plate 19 is provided at a predetermined distance from the heating element 14. A plurality of radiant heat outlets 27 and a plurality of hot air discharge ports 23 are formed on the other side surfaces of the column 4 except for the side surface on which the inner support plate 13 faces. The operation of the heater configured as described above will be described below with reference to FIGS.
[0013]
When the heating element 14 and the motor 21 of the fan 20 are energized, the heating element 14 generates heat and the fan 20 rotates. An air flow a is generated by the fan 20. The air flow a is introduced from outside through the suction port 22 into the first space 6 above the fan 20. The introduced air flow a enters the second space 9 through the opening 7. The air flow a is the flow of air above the columns 4. The air introduced into the second space 9 is sent downward through the second opening 10 by the fan 20 and is introduced into the first internal space 3 and the second internal space 16. The air introduced into the second space 16 flows downward along the first reflector 17. This air is heated by touching the first reflection plate 17 heated by the heating element 14 and becomes warm air. This warm air passes through the third opening 18 and the discharge port 23 formed at the lower part of the column 4 and is discharged along the bottom plate 2 as shown in FIG. With this warm air, the temperature of the air below the heating space 24, which is the space to be warmed, rises. The air introduced into the first internal space 3 is directly heated by the heating element 14, becomes warm air, and is discharged from the outlet 27 to the heating space 24.
[0014]
As shown in FIG. 3, radiant heat including infrared rays from each heating element 14 is reflected by the first reflection plate 17 and the second reflection plate 19, becomes thermal radiation d, passes through a plurality of outlets 27, and passes through two outlets 27. The heating space 24 is radiated into the heating space 24 in one direction to warm the heating space 24. In FIG. 4, the discharge direction of the warm air is indicated by an arrow a.
According to the embodiment of the present invention, as shown in FIG. 2, the radiant heat d and the warm airflow a exit from the outlet 27 provided in a wide range below the column 4 to the heating space 24. Become uniform. Since the warm air flow a rises after exiting from the outlet 27, it is difficult to reach the vicinity of the bottom plate 2 below the heating space 24. However, as shown in FIG. 4, a warm air flow a is discharged from the discharge port 23 near the bottom plate 2, so that the heating space 24 has a substantially uniform temperature.
[0015]
The heater illustrated in FIG. 1 has a configuration in which the support columns 4 support the table top plate 1, but may have a configuration in which the table top plate is supported by legs not shown. Further, the column 4 has an octagonal bottom surface as an example, but other polygonal bottoms or circular bottoms can be similarly implemented. The number of the rod-shaped heating elements 14 is not limited to two, and the present invention can be similarly implemented by arranging three or more heating elements 14. Furthermore, although the example has been described in which the heating element 14 is held by the holder 15 fixed to the inner support plate 13, the same applies to the case where the holder is fixed to another position such as the inner bottom plate or the middle top plate. It is possible.
[0016]
<< Embodiment 2 >>
FIG. 5 is a side sectional view of a heater according to Embodiment 2 of the present invention. 5, the same components as those in FIG. 1 are denoted by the same reference numerals, and duplicate description will be omitted.
In the heater of the present embodiment, a plurality of fourth openings 31 are formed near the center in the longitudinal direction of first reflector 17. At the lower end of each opening 31, a fin 32 is provided which projects obliquely upward at an angle of about 45 ° toward the second internal space 16. Other configurations are the same as those of the first embodiment shown in FIG.
In the heater of the present embodiment, a part of the airflow guided into the second internal space 16 hits the fins 32 and is guided to the fourth opening 31 and flows into the first internal space 3. The air that has flowed into the first internal space 3 is directly heated by the heating element 14 and discharged through the outlet 27 to the heating space 24.
In the heater of the present embodiment, the air heated to a certain extent when passing through the second internal space 16 flows into the first internal space 3 and is further heated, so that the temperature of the air increases. Since the high-temperature air is discharged from the outlet 27 to the heating space 24, the air temperature in the heating space 24 increases, and a heater having a high heating effect can be realized.
[0017]
<< Embodiment 3 >>
FIG. 6 is a side sectional view of a heater according to Embodiment 3 of the present invention. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and duplicate description will be omitted.
In the heater of the present embodiment, the inner support plate 13a is provided at a predetermined angle in the range of 1 to 5 degrees from the vertical direction. Therefore, the second reflector 19 provided on the inner support plate 13a, the heating element 14 held by the holder 15, and the first reflector 17a are also inclined at the predetermined angle. As shown in FIG. 6, the inclination direction is such that the upper end of the inner support plate 13a is located at the same position as in FIG. 1, but the lower end is located near the center line C of the column 4. By providing this inclination, the obliquely downward angle of the emission direction of the radiant heat with respect to the horizontal direction increases. Thereby, the radiant heat reaching the vicinity of the upper surface of the bottom plate 2 increases, and the air temperature also increases.
According to the heater of the present embodiment, since the radiant heat near the upper surface of bottom plate 2 is strong, there is an effect that the feet of a person sitting around the heater become particularly warm.
[0018]
<< Embodiment 4 >>
FIG. 7 is a cross-sectional view of the heater according to Embodiment 4 of the present invention, taken along a plane parallel to the table top. The side cross-sectional view of the heater of the present embodiment is almost the same as FIG. 1 and will be described with reference to FIG.
In the present embodiment, as shown in FIG. 7, the reflection surface of the first reflection plate 17b has a shape obtained by combining two paraboloids or a surface approximating a paraboloid. By placing the heating element 14 at a predetermined position near the focal point of the paraboloid, the radiant heat of the heating element 14 indicated by the arrow d is concentrated at a central angle of about 90 °. By arranging the two left and right heating elements 14 at predetermined positions near the focal points of the respective reflection plates 17b, the radiant heat of the two heating elements 14 can be concentrated in the right and left central angle ranges of 90 °.
According to the present embodiment, since the radiant heat is concentrated in the range of the central angle of 90 °, the heating space in this range can be particularly effectively heated.
[0019]
【The invention's effect】
As described in detail in each of the above embodiments, according to the present invention, the table top plate is attached to the upper end, and the inner top plate above the inner space of the cylindrical column with the bottom plate attached to the lower end. A fan is provided between the top plates, and a heating element and first and second reflection plates for directing radiant heat of the heating element in a horizontal direction are provided in a first internal space below the middle top plate. With this configuration, the air passing through the second internal space between the inner wall of the column and the first reflector is warmed and discharged to the entire area of the heating space and downward. Further, the radiant heat of the heating element can be reflected by the first and second reflectors and radiated to at least two fan-shaped regions around the entire circumference of the support. Thereby, heat radiation and warm air can efficiently warm the heating space, and the temperature distribution in the heating space becomes uniform. Further, since the first space is provided above the inner top plate and the third space is provided below the inner bottom plate, the temperature rise of the table top plate and the bottom plate can be prevented.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a heater according to Embodiment 1 of the present invention. FIG. 2 is a side cross-sectional view showing a state of heat radiation and air flow of the heater of Embodiment 1 of the present invention. 2 is a sectional view taken along the line III-III. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. FIG. 5 is a sectional side view of a heater according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view showing a state of heat radiation of a heater according to a fourth embodiment of the present invention. FIG. 8 is a cross-sectional view of a conventional heater.
REFERENCE SIGNS LIST 1 table top plate 2 bottom plate 3 first internal space 4 column 5 inner top plate 6 first space 7 first opening 8 middle top plate 9 second space 10 second opening 11 inner bottom plate 12 third Space 13 inner support plate 14 heating element 15 holder 16 second internal space 17 first reflector 18 third opening 19 second reflector 20 fan 21 motor 22 suction port 23 discharge port 24 heating space 27 Outlet 31 fourth opening

Claims (6)

A table top plate is attached to an upper end, a bottom plate is attached to a lower end, a plurality of suction ports are provided near the table top plate, a plurality of discharge ports are provided near the bottom plate, and the suction port and the discharge port are provided. A cylindrical post having a plurality of holes between the outlets,
An inner top plate having a plurality of first openings, opposed to the table top plate at a predetermined interval, and provided to form a first space between the inner top plate and the table top plate;
A plurality of second openings are provided in the internal space of the support so as to face the inner top plate at a predetermined interval and to form a second space between the inner top plate and the inner top plate. Middle plate,
The internal space of the support column is opposed to the bottom plate at a predetermined interval, forms a third space with the bottom plate, and forms a first internal space with the middle top plate. An inner bottom plate arranged in the
The pillar is disposed substantially vertically between the middle top plate and the inner bottom plate so as to form a second inner space at the center of the first inner space, and a portion close to the inner bottom plate A first reflector having a third opening,
A rod-shaped heating element provided substantially vertically in the first internal space along the first reflector so that the longitudinal direction is substantially vertical;
A second reflector provided between the heating element and an inner wall surface of the support column at a predetermined distance from the heating element, and a second reflector provided in the second space to generate a downward airflow; Equipped with an electric fan,
The first opening, the second opening, and the first internal space, which connect the air sucked into the first space from the suction port by the rotation of the electric fan to the second space, By sequentially passing through, the heating element heats and discharges from the discharge port and the hole, and the radiation reflected by the first and second reflectors is radiated from the hole to the outside of the cylindrical support. A heating machine characterized in that: 2. The heater according to claim 1, wherein a plurality of fourth openings are formed in the first reflection plate forming the second internal space. 3. The heater according to claim 2, wherein an air guide plate protruding obliquely upward in the second internal space is provided near the fourth opening. 3. The heating element according to claim 1, wherein at least one of the first and second reflection plates provided at a predetermined interval on the heating element is inclined at a predetermined angle from a vertical direction. A heating machine according to claim 1. The heater according to claim 4, wherein the predetermined angle is an angle selected from a range of 1 degree to 5 degrees. The support is a hollow cylinder having a polygonal cross section, and a plurality of discharge ports are formed on at least two arbitrary side surfaces, respectively, and radiant heat of one heating element is transferred to the first reflector and the second reflector. The heater according to any one of claims 1 to 4, wherein the heater is configured to reflect the light toward holes formed in the at least two side walls by a reflection plate.

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