JP2012052716A - Electric panel heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric panel heater with a structure having two juxtaposed frames, which prevents a temperature rise in the frames.SOLUTION: A heat shielding member 2 is disposed at the back in each of frame bodies 1 in a thin type panel forms and radiation openings 4 where each guard 3 is disposed is provided on the front face of each of the frame bodies 1. The surface-type heating element 5 is mounted in each of the frame bodies 1 between the heat shielding member 2 and the guard 3, and frame bodies 1 are juxtaposed by two pieces and connected by a rotating shaft 6. The two of frame bodies 1 rotates around the rotating shaft 6, and an angle between the two of frame bodies 1 can be varied between a closed state where the radiation openings 4 of the frame bodies 1 face each other, and an opened state where the radiation openings 4 are horizontally located in a line. Each of upward heat radiation openings 7 is formed in a front upper part of each of the frame bodies 1 by bending or curving an upper part of each of the frame bodies 1 to a back side so that the front upper part of each of the frame bodies 1 may turn to a slanting upper part. In a case of the closed state of the two of frame bodies 1, an upper gap 8a formed with the upward heat radiation openings 7 facing each other is formed above a gap 8 of the two of frame bodies 1, and hot air is discharged upward the frame bodies 1 while being diffused at the upper gap 8a spreading toward a slanting upper part.

Description

  The present invention relates to an electric panel heater that heats by heat dissipation.

  The electric panel heater includes a frame body having a heat radiation opening on the front surface, a guard covering the heat radiation opening, a planar heating element attached to the frame body so as to radiate heat from the radiation opening, and a planar heating element in the frame body. And a heat shield member arranged behind, and radiates heat rays generated by the planar heating element from the heat radiation opening.

  The applicant has proposed an electric panel heater in which two frame bodies each having a planar heating element are connected by a rotating shaft portion, and a heat radiation opening of one frame body and a heat radiation opening of the other frame body are provided. The angle between the two frames can be changed between the opposed closed state and the open state in which the heat dissipation openings of one frame and the heat dissipation openings of the other frame are arranged side by side. If this electric panel heater is used in a state where the two frames are spread out, a wide range of heating is possible, and if the two frames are closed and the heat radiation opening is used in a closed state, heating by convection is possible. Become. Furthermore, if it is closed during storage, a compact and space-saving configuration can be realized (Patent Document 1).

JP 2008-8601 A

  When the two frames are closed and the heat dissipation openings are opposed to each other, the air heated by the heat rays radiated from the heat dissipation openings increases the distance between the frames, so the temperature inside the frame is not open. Higher than when used. Therefore, when used in the closed state, ON / OFF control of the sheet heating element in the frame is performed, and when the frame rises to a preset temperature, energization of the sheet heating element is stopped and the temperature in the frame rises However, if the sheet heating element is frequently turned ON / OFF, the load on the sheet heating element increases, which is not preferable. Therefore, it is necessary to reduce the number of times the sheet heating element is turned ON / OFF as much as possible. is there. As a countermeasure for this, a method of widening the interval between the two frames is conceivable, but there is a problem that the handleability deteriorates when the interval between the two frames is increased.

  In addition, since the front surfaces of the front legs are in contact with each other in order to form a gap between the two frames when the frame is closed, the shape of the front legs is reduced. When used in an open state in which the heat radiation openings of the two frames are arranged side by side, the stability of the frame in the front-rear direction is deteriorated. Therefore, conventionally, the frame body is prevented from falling by restricting the angle of the two frame bodies so that the two frame bodies have a square shape. In this case, the heat radiation openings of the two frame bodies face inward. Therefore, there is a problem that the heat radiation range becomes narrow.

  Conventionally, an air discharge port is provided on the upper surface of the frame body, and since hot air is discharged from the air discharge port and becomes high temperature, a handle portion of the frame body is provided on the back surface of the frame body. For this reason, when opening and closing the two frame bodies, it is necessary to operate by holding the handle portion by reaching out to the back side of each frame body, and the opening / closing operation is very difficult. Also, the handle on the back of the frame is in a conspicuous position when used with the frame closed, so the design is prioritized and the handle is small and difficult to hold, making it difficult to carry the product Met.

  The present invention solves the above-mentioned problems, and a heat-dissipating member 2 is disposed on the back of the thin panel-shaped frame 1 and a heat radiation opening 4 is provided on the front surface of the frame 1 with a guard 3 disposed. The frame body 1 between the heat shield member 2 and the guard 3 is attached with a planar heating element 5, and the two frame bodies 1 are arranged side by side and the two frame bodies 1 are connected by the rotating shaft portion 6. The two frame bodies 1 are rotated around the rotation shaft portion 6 so that the heat radiation openings 4 of the two frame bodies 1 are opposed to each other, and the heat radiation openings 4 are arranged side by side. In the electric panel heater in which the angle between the two frame bodies 1 can be changed, the upper portion of the frame body 1 is bent toward the back side of the frame body 1 so that the heat radiation opening 4 faces obliquely upward. Alternatively, it is curved to form an upward heat radiation opening 7 in the upper front portion of the frame body 1, and when the two frame bodies 1 face each other, The heat radiation opening 7 forms an upper space 8a that widens the space 8 between the two frame bodies 1 at the upper part of the frame body 1, and the hot air rising from the planar heat generating body 5 flows from the upward heat radiation opening 7 to the frame body 1. It is characterized by being discharged above.

  Further, the upward heat radiation opening 7 is formed at a position lower than the upper end of the planar heating element 5, so that the heat rays radiated from the vicinity of the upper end portion of the planar heating element 5 are spaced from the upward radiation opening 7 to the upper interval 8 a. Therefore, the hot air in the upper part of the frame body 1 is easily diffused, and the temperature rise in the frame body 1 can be prevented.

  Further, the upper end portion 7 a of the upward heat radiation opening 7 is positioned on the rear side of the frame body 1 with respect to the planar heating element 5 in the frame body 1, so that hot air rising in the frame body 1 is directed upward. Is released above the frame 1, the heat dissipation range is widened, and the temperature inside the frame 1 can be prevented from rising.

  Further, the heat shield member 2 extends upward from the upper end position of the planar heating element 5 and is connected to the upper end portion of the upward heat radiation opening 7 so that the hot air rising in the frame body 1 is reliably radiated upward. Since it is discharged | emitted from the opening 7, the hot air in the frame 1 does not go to a back part, but can maintain the upper surface and back surface of the frame 1 at low temperature.

  Further, a recess 9a is formed in the upper part of the back surface of the frame 1, and the handle 9 of the handle 9 is configured by the upper surface of the frame 1 and the recess 9a, thereby forming a handle 9 having a shape that is easy to grip. Was able to.

  In the present invention, the upper portion of the frame body 1 is bent or curved toward the back side of the frame body 1 to form the upward heat radiation opening 7 with the front upper portion of the frame body 1 obliquely upward, and the two frame bodies 1 face each other. When in the closed state, the upper interval 8a that extends obliquely upward is formed above the interval 8 between the two frames 1, so that the interval 8 is raised by being warmed by the heat rays emitted from the heat radiation opening 4 of the frame 1. The hot air diffuses at a wide upper space 8a and moves upward above the frame 1 and quickly diffuses the hot air concentrated on the upper portion of the frame 1 so that the maximum temperature near the upper portion of the frame 1 is kept low. I was able to.

  In addition, by tilting the upper part of the frame body 1 toward the back side of the frame body 1, even if the shape of the leg on the front surface side of the frame body 1 is small, the structure does not fall to the front surface side. When it is used, the angle of the two frame bodies 1 does not need to be regulated, and the two frame bodies 1 can be opened to the side-by-side position, so that heating in a wide range is possible.

  Further, the upward heat radiation opening 7 on the upper portion of the frame 1 is formed from a position lower than the upper end position of the planar heating element 5 in the frame 1, and the upper portion of the planar heating element 5 and the lower portion of the upward radiation opening 7 are opposed to each other. By configuring so, the heat rays radiated from the vicinity of the upper end of the planar heating element 5 are emitted from the upward heat radiation opening 7 to the upper space 8a, so that the hot air gathered at the upper part of the frame 1 can be quickly diffused and the frame The temperature increase in the body 1 can be suppressed. As a result, the inside of the frame body 1 can be maintained at a low temperature without increasing the distance 8 between the two frame bodies 1, so that the number of ON / OFF operations of the planar heating element 5 can be reduced. The load applied to the heating element 5 and parts can be reduced.

  Further, the upper end portion 7 a of the upward heat radiating opening 7 is configured to be located on the rear side of the frame body 1 with respect to the planar heating element 5 in the frame body 1, so that the thermal insulation member 2 and the planar heating element 5 are aligned. Thus, the hot air rising in the frame body 1 is released upward from the heat radiation opening 7. Since the opening area of the upper part in the frame body 1 can be expanded and the hot air flows smoothly and is released to the outside of the frame body 1, the temperature rise in the frame body 1 can be suppressed. Moreover, since the hot air released from the upward heat radiation opening 7 rises while spreading to the back side of the frame body 1, the maximum temperature of the upper part of the frame body 1 can be kept low without concentrating the hot air above the frame body 1. The temperature of the whole room rises gently, and the temperature distribution in the room can be made uniform.

  Further, the heat shield member 2 extends upward from the upper end position of the planar heating element 5 and is connected to the upper end portion 7 a of the upward heat radiation opening 7. Hot air rising in the frame body 1 is induced by the heat shield member 2. Thus, since the heat is released from the upward heat radiation opening 7, hot air does not flow around the upper surface and the back surface in the frame body 1, and the upper surface and the back surface of the frame body 1 can be maintained at a low temperature.

  Further, a recess 9 a is formed in the upper part of the back surface of the frame body 1, and a handle portion of the handle 9 is constituted by the upper surface of the frame body 1 and the recess 9 a. Since the upper surface of the frame body 1 can be maintained at a low temperature by the heat shield member 2 connected to the upper end portion 7 a of the upward heat radiation opening 7, the upper surface of the frame body 1 can be configured as a handle portion of the handle 9. In addition, the handle 9 having a shape that can be easily gripped by placing the hand on the concave portion 9a can be configured, and the frame body 1 can be easily opened and closed and carried, thereby improving the handleability.

It is a longitudinal cross-sectional view at the time of the closed state of the electric panel heater which shows the Example of this invention. It is a cross-sectional view of the main part when the electric panel heater showing the embodiment of the present invention is in a closed state. It is a perspective view at the time of the closed state of the electric panel heater which shows the Example of this invention. It is a perspective view at the time of the open state of the electric panel heater which shows the Example of this invention. It is explanatory drawing of the thermal radiation range of the electric panel heater which shows the Example of this invention.

  The present invention will be described with reference to the embodiments shown in the drawings. 1 is a frame body of an electric panel heater, 2 is a heat shield member disposed on the back of the frame body 1, 4 is a heat radiation opening formed on the front surface of the frame body 1, 3 is a guard attached to the heat radiation opening 4, 5 is a planar heating element constituting a heater attached between the heat shield member 2 and the guard 3 in the frame 1, and 10 is a frame attached to the bottom surface of the frame 1 The leg member extends in the front-rear direction of the body 1, and the frame body 1 is made to stand from the floor surface by the leg member 10.

  11 is an operation panel provided on the side surface of the frame 1, 12 is an operation unit configured by an operation switch, a timer setting switch, and the like disposed on the operation panel, 12a is a display unit configured by an operation lamp, a timer lamp, and the like. It is a control board that performs energization control of the planar heating element 5 based on the signal of the operation unit 12, and the control board 13 starts energization of the planar heating element 5 when an operation start signal is input from the operation unit 12, The planar heating element 5 is heated to a high temperature as a whole, and heat rays generated from the planar heating element 5 are radiated forward from the heat radiation opening 4 on the front surface of the frame 1.

14 is an air inlet provided on the bottom surface of the frame 1, 15 is an air flow path formed in the frame 1, and the heat shield 2 and the planar heating element 5 are located in the air flow path 15. Yes. When energization of the sheet heating element 5 is started, hot air generated from the sheet heating element 5 rises in the air flow path 15, and the air between the bottom surface of the frame body 1 and the floor surface is air inlet 14. Into the air flow path 15.
Conventionally, an air outlet is provided on the upper surface of the frame body 1, and the hot air generated in the planar heating element 5 is outside the frame body 1 from the heat radiation opening 4 on the front surface of the frame body 1 and the air outlet port on the upper surface of the frame body 1. The room is heated.

The electric panel heater of the embodiment is configured by arranging two frame bodies 1 side by side, 6 is a rotating shaft portion that connects and integrally forms the two frame bodies 1, and 6a is a rotating shaft. Two attachment members formed on the portion 6, two attachment members 6 a of the rotation shaft portion 6 are respectively attached to the side surfaces of the two frame bodies 1, and two frames centering on the rotation shaft portion 6. The body 1 is connected so as to rotate.
The angle between the two frame bodies 1 can be arbitrarily changed between a closed state where the heat radiation openings 4 of the two frame bodies 1 face each other and an open state where the heat radiation openings 4 are arranged side by side. .

  When the two frames 1 are spread out, the heat dissipation openings 4 are arranged side by side, and heat rays are radiated from the heat dissipation openings 4 on the front surface of the two frames 1. For this reason, the radiation range of a heat ray spreads in the horizontal direction, and the wide area ahead of the two frames 1 can be heated.

Reference numeral 8 denotes an interval formed between the two frame bodies 1 when the two frame bodies 1 are closed and the heat radiation openings 4 are opposed to each other. It is attached so that it may be located ahead rather than the front of 1, and when two frames 1 are closed and heat dissipation opening 4 is opposed, rotation axis part 6 is located between two frames 1. At the same time, the front surface of the leg member 10 comes into contact with the front surface of the other leg member 10, thereby forming a gap 8 between the two frame bodies 1.
For this reason, when the two frame bodies 1 are closed and used with the heat radiation opening 4 facing each other, the heat rays of the planar heating element 5 are emitted from the heat radiation opening 4 to the interval 8 to warm the air in the interval 8. Since the warmed air rises in the interval 8 and is released above the frame 1, a high-temperature air flow toward the upper side of the frame 1 is formed, and heating by natural convection can be performed.

  Further, the operation panel 11 arranged on the side surface of the frame body 1 does not protrude and hide to the side of the frame body 1 when the two frame bodies 1 are closed, so that the two frame bodies 1 are closed. However, the driving operation by the operation unit 12 and the driving state can be confirmed by the display unit 12a.

  When the two frames 1 are used in a square shape, the heat rays radiated from the respective heat radiation openings 4 of the two frames 1 intersect with each other, and the portions where the heat rays in front of the frame 1 intersect Heat can be concentrated.

  When the two frame bodies 1 are used in a closed state, the air in the interval 8 is warmed by the heat rays radiated from the heat radiating openings 4, and the interval 8 between the frame bodies 1 rises as hot air. For this reason, the temperature of the space | interval 8 of the two frame bodies 1 becomes high, and the temperature in the frame body 1 tends to rise. Further, in the upper part of the frame 1, the hot air rising from the interval 8 and the heat rays emitted from the planar heating element 5 are concentrated, so that the temperature of the upper part of the frame 1 becomes higher than the lower part of the frame 1. .

  Reference numeral 16 denotes a temperature detection means composed of a thermistor arranged in one frame body 1. When the temperature in the frame body 1 rises and the temperature detection means 16 detects a preset temperature, the control board 13 Since the energization of the heating element 5 is stopped, the temperature rise in the frame 1 can be suppressed. Further, when the temperature in the frame 1 decreases and the temperature detection means 16 detects a temperature lower than the preset temperature, the control board 13 starts energization of the planar heating element 5 that has been stopped. When the body 1 is used in a closed state, heating is performed while suppressing the temperature rise in the frame body 1 by repeatedly energizing and stopping the planar heating element 5 based on the temperature detected by the temperature detecting means 16. Yes.

By doing so, it can be used even when the frame 1 is closed, but if the temperature in the frame 1 is likely to rise, the energization / stop of the planar heating element 5 is frequently switched. Therefore, a load is applied to the sheet heating element 5 and the electrical components.
In order to suppress the temperature rise in the frame 1, it is advantageous that the distance 8 between the two frames 1 is wide. However, if the distance 8 is widened, another problem occurs that installation space and portability deteriorate. The temperature rise in the frame body 1 can be suppressed without increasing the interval 8 between the frame bodies 1 as much as possible.

  In the present invention, the upper part of the frame 1 is curved or bent so as to incline toward the back side of the frame 1, and 7 is provided on the front upper part of the frame 1 that is inclined and faces obliquely upward. Further, the upward heat radiation opening 8a is an upper space formed at the upper part of the frame 1 facing the upward heat radiation opening 7 when the two frame bodies 1 are closed, and the upper space 8a spreads upward.

  When the frame 1 is used in a closed state, the hot air rising at the interval 8 is released above the frame 1 while diffusing at the upper interval 8a, and the hot air diffuses at the upper portion of the frame 1. Therefore, even if the amount of hot air in the upper part of the frame 1 is large, the temperature rise in the upper part of the frame 1 can be suppressed, and the temperature above the frame 1 can be kept low by the diffusion of hot air. It was possible to do.

  Further, since the frame body 1 is inclined to the back side by tilting the upper part of the frame body 1, the frame body 1 is less likely to fall down to the front side. No more worries about falling. For this reason, conventionally, it has been necessary to regulate the angles of the two frame bodies 1 so that the two frame bodies 1 have a U-shape, but in this configuration, the frame body 1 is moved to a position where the two frame bodies 1 are aligned in a horizontal line. Since there is no fear of falling even if it is opened, there is no need to regulate the angle of the two frames 1, and when the two frames 1 are used in an open state, the respective heat radiation openings 4 of the two frames 1 are used. Since the emitted heat rays can reach the front without crossing, the wide area in front of the frame 1 can be heated.

In the embodiment of the present invention, the inclined position of the upper part of the frame 1 is set lower than the upper end position of the planar heating element 5 so that the upper part of the planar heating element 5 faces the lower part of the upward heat radiation opening 7. Therefore, heat rays generated in the vicinity of the upper end portion of the planar heating element 5 are radiated from the upward heat radiation opening 7 to the upper space 8a.
In the vicinity of the upper end portion of the sheet heating element 5, the temperature tends to increase due to the hot air rising in the interval 8 and the heat rays radiated from the sheet heating element 5. Therefore, the temperature rise at the interval 8 can be suppressed.
And the upper space | interval 8a where the heat ray radiated | emitted from the upward heat radiation opening 7 and the hot air which raised the space | interval 8 gathers becomes wide upwards, and a hot air spread | diffuses easily, The hot air of the upper space | interval 8 spreads quickly. However, since it is discharged above the frame body 1, it is possible to suppress the temperature rise of the upper space 8 a and to maintain the inside of the frame body 1 at a low temperature.

Further, in another embodiment of the present invention, the upper heat radiating opening 7 is provided such that the upper end portion 7a thereof is located on the rear side of the frame body 1 with respect to the planar heating element 5 in the frame body 1, and the upward heat radiating opening 7 is provided. It is also formed above the planar heating element 5.
In this configuration, hot air in the frame body 1 rises along the air flow path 15 along the heat shield member 2 and the planar heating element 5, and is released from the upward heat radiation opening 7 of the frame body 1 to above the frame body 1. However, since an opening continuous from the front surface of the frame body 1 to above the planar heating element 5 is formed in the upper portion of the frame body 1 and the opening area of the upper portion of the frame body 1 is increased, the inside of the frame body 1 is raised. Hot air was smoothly discharged out of the frame body 1 from the upward heat radiation opening 7, improving the heat radiation effect and suppressing the temperature rise in the frame body 1.

  As described above, even when the two frame bodies 1 are used in a closed state, if the temperature rise in the frame body 1 can be suppressed, the number of times the planar heating element 5 is energized / stopped can be reduced. The load applied to the heating element 5 and parts can be reduced. Even if the temperature in the frame 1 rises to the set temperature, when the planar heating element 5 stops, the temperature in the frame 1 can be lowered in a short time, and the planar heating element 5 stops. Since the running time can be shortened, the temperature distribution in the room can be made uniform.

Further, the heat shield member 2 extends upward from the upper end position of the planar heating element 5, and the upper end portion 2 a of the heat shield member 2 is connected to the upper end portion 7 a of the heat radiation opening 7. For this reason, the hot air directed upward of the sheet heating element 5 in the frame body 1 rises along the heat shielding member 2, is guided by the heat shielding member 2, and is released from the upward heat radiation opening 7 to above the frame body 1. Will be.
In this configuration, the upper surface of the frame body 1 is positioned behind the heat shield member 2, and hot air rising in the frame body 1 is released from the upward heat radiation opening 7 without flowing to the upper surface or back surface in the frame body 1. Therefore, the upper surface of the frame 1 and the upper part of the back surface can be maintained at a low temperature.

In addition, conventionally, an air discharge port for releasing hot air is provided on the upper surface of the frame, and a hand cannot be directly touched on the upper surface of the frame, so a handle is formed on the rear surface of the frame lower than the upper surface. However, it was very difficult to open and close the frame at the position of the handle. In addition, since a large-sized handle portion on the back surface does not look good, the shape of the handle portion is small and difficult to hold.
9a is a recess formed in the upper center of the back surface of the frame body 1, 9b is a continuous surface between the upper surface of the frame body 1 and the recess 9a, and 9 is constituted by the upper surface of the frame body 1 and the recess 9a on the back surface of the frame body 1. In the embodiment, a finger is inserted into a recess 9a provided at the upper back of the frame body 1, and a finger is placed on the downward continuous surface 9b, and a finger is placed on the upper surface of the frame body 1, thereby The upper surface of the body 1 and the recess 9a can be gripped, and the two frame bodies 1 can be opened and closed or the frame body 1 can be lifted.

In the present invention, it is not necessary to provide an air discharge port on the upper surface of the frame body 1 by releasing hot air from the upward heat radiating opening 7 provided on the front surface of the frame body 1, and the heat shielding member 2 blocks the hot air. Since the upper surface of the body 1 and the upper part of the back surface can be maintained at a low temperature, the corner portion between the upper surface and the back surface of the frame 1 can be used as the handle 9. And if it is this position, it is not necessary to extend a hand to the back side of the two frame bodies 1, it can be easily put on the handle 9, and it becomes easy to open and close.
In addition, since the shape and size that can be easily held can be ensured without impairing the design of the product, the frame 1 can be easily opened and closed and the product can be easily carried, thereby improving the handleability.

DESCRIPTION OF SYMBOLS 1 Frame body 2 Heat shield member 3 Guard 4 Radiation opening 5 Planar heating element 6 Rotating shaft part 7 Upward radiation opening 7a Upper end part 8 Spacing 8a Upper gap 9 Handle 9a Recessed part

Claims (5)

The heat shield member (2) is disposed on the back portion in the thin panel-shaped frame (1), and the heat radiation opening (4) in which the guard (3) is disposed on the front surface of the frame (1) is provided. A sheet heating element (5) is attached to the frame (1) between the heat shielding member (2) and the guard (3), and
Two frame bodies (1) are arranged side by side and two frame bodies (1) are connected by a rotation shaft portion (6), and the two frame bodies (1) are centered on the rotation shaft portion (6). Between the closed state in which the heat radiation openings (4) of the two frame bodies (1) face each other and the open state in which the heat radiation openings (4) are arranged side by side. In the electric panel heater where the angle between is changeable,
The upper part of the frame (1) is bent or curved toward the back side of the frame (1) so that the heat dissipation opening (4) faces obliquely upward, and the upward heat dissipation opening ( 7)
When the two frames (1) are in a closed state, the upward heat radiating opening (7) widens the interval (8) between the two frames (1) at the upper part of the frame (1). Forming an interval 8a;
The electric panel heater, wherein hot air rising from the planar heating element (5) is discharged above the frame body 1 from the upward heat radiation opening (7).   The electric panel heater according to claim 1, wherein the upward heat radiation opening (7) is formed at a position lower than an upper end of the planar heating element (5).   The upper end (7a) of the upward heat radiation opening (7) is located on the back side of the frame (1) with respect to the planar heating element (5) in the frame (1). Or the electric panel heater of 2.   The heat shield member (2) extends upward from the upper end position of the planar heating element (5) and is connected to the upper end portion (7a) of the upward heat radiation opening (7). 3. The electric panel heater according to 3.   A concave portion (9a) is formed in the upper back of the frame (1), and a handle portion of the handle (9) is constituted by the upper surface of the frame (1) and the concave portion (9a). The electric panel heater according to claim 4.

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