KR101446169B1 - Upper plate of electric heating type bed - Google Patents

Abstract

Disclosed is an electric heating type upper board of a bed, wherein the electric heating type upper board can be prevented from being distorted by the contraction and the expansion of wood material. The disclosed electric heating type upper board of a bed comprises: charcoal particles filling the inner space of side walls attached to the upper border of a heater plate, receiving heat emitted from the heater plate, and storing and emitting the heat; multiple inner panels covering the charcoal particles, having connection grooves and connection protrusions which are formed on the front and the rear surfaces thereof and have shapes corresponding to each other, having coupling protrusions formed on the left and the right surfaces thereof, and having mount holes formed therein; non-woven fabrics attached to the lower surfaces of the inner panels, and preventing the charcoal particle from being spilled into the mount holes of the inner panels; ceramic panels of which each is attached to be inserted into each of the mount holes of the inner panels and has multiple air vents therein; front and rear outer panels coupled to the front or the rear surfaces of the outermost panels, having connection protrusions or connection grooves which are formed on the front or the rear surfaces thereof and have shapes corresponding to the connection grooves or the connection protrusions of the inner panels, and having coupling protrusions on the left and the right side surfaces thereof; and left and right outer panels coupled to the left and the right side surfaces of the inner panels, and having coupling grooves having shapes corresponding to the coupling protrusions of the inner panels and the coupling protrusions of the front and the rear outer panels.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric heating bed top plate,

The present invention relates to a heat transfer bed top plate, and more particularly, to a heat transfer bed top plate capable of maintaining a stable assembled state without deforming the entire outer shape even if distortion of the wood due to contraction and expansion of the wood occurs during use, The present invention relates to an electric heating bed top plate that emits a large amount of negative ions.

Typically, a home bed consists of a frame, a headboard, a footboard, a bottom, and a mattress. Recently, as the improvement of residential culture and the interest in so-called well-being products have increased, various kinds of heating and heating technology, electric heater technology, and the like have been added, Anion and the like, which are combined with functionalities such as treatment and fomentation effect, are popular in the ondol culture, or are attracted to various age groups who prefer it.

Phytoncide is a natural antimicrobial substance that emits in the air to defend itself from pests and various microorganisms such as alpha pinene, sabinene, betapinene, cymene, and limonene. It is active in the field of atopic dermatitis treatment and alternative medicine. The organic compounds of the main ingredient Terpene have a beneficial effect on the body such as sterilization, antibacterial, sedation, deodorization, relieving stress, increasing immune function of allergy and skin diseases, preventing house dust mite, It is reported that various beds using evergreen arborescent trees such as Japanese white timber and Japanese cedar wood, which contain a large amount of these components and emit them, have been proposed.

For example, as shown in FIG. 1, the 'functional soft white heating bed containing loess and charcoal' disclosed in Korean Patent Publication No. 10-1001732 is mounted on the upper surface of the base frame 110 of the bed main body 100 A functional member 140 seated on the upper surface of the heat transfer plate 132 and a cover frame 120 seated on the upper surface of the functional member 140. [

Particularly, the cover frame 120 is composed of a frame member 121 formed of a wood and forming a rectangular frame portion, and a plurality of support panels 124 attached to the inside of the frame member 121.

However, due to the nature of the wood, the cover frame 120 and the support panel 124 may have a phenomenon in which the moisture in the interior of the cover frame 120 is shrunk as the moisture in the interior of the cover frame 120 is dried, And the shape of the assembly of the cover frame 120 and the support panel 124 is distorted, thereby deforming the outer shape.

That is, since it takes usually about 2 to 3 years to dry the wood ideally, it is inevitable that a large amount of water shrinks as the wood shrinks.

2, in order to minimize the twisting of the cover frame 120 and the support panel 124, the support panel 124 has a lower surface on which the support panel 124 is formed, A plurality of reinforcing rods 127 are attached.

However, in order to effectively prevent the gap between the support panels 124 from being deformed or the shape of the entire cover frame 120 from being deformed merely by connecting and fixing the support panels 124 with the reinforcement rod 127, There are considerable limitations.

In addition, such a conventional electro-thermal bed is vulnerable to safety because it is very dangerous to short-circuit or short-circuit each other due to external force by using a heat ray film such as an area heating element as a heat source, It is required to continuously supply electricity in order to maintain a constant temperature. As a result, the power consumption is excessively high, resulting in an extremely low energy consumption efficiency.

In addition, the heat ray film generates harmful electromagnetic waves to the human body during the heating process, which is highly likely to adversely affect the health of the user. This is due to patterns and consumption trends of modern people who prefer a well-being life It acts as a cause of avoiding the use of the dry half-bath and has an adverse effect on the merchantability.

Korean Registered Patent No. 10-1001732 (December 20, 2010) Korean Utility Model Publication No. 20-2010-0002284 (2010.03.05) Korean Registered Patent No. 10-0945858 (Mar. 3, 2010) Korean Patent Publication No. 10-2004-0096847 (November 17, 2004) Korean Patent Publication No. 10-2010-0009970 (2010.01.29) Korean Patent Laid-Open Publication No. 10-2013-0009530 (Jan. 23, 2013) Korean Utility Model Registration No. 20-0455476 (August 31, 2011)

Accordingly, the present inventor has focused on the above-mentioned matters in comprehensive consideration and solved the problems, so that a large amount of far infrared ray and anion which are advantageous to the human body due to high energy consumption efficiency, as well as a distortion of the wood due to contraction and expansion phenomenon The present inventors invented the present invention while making an effort to develop a new bed top plate capable of maintaining a stable state without deforming the entire assembly form.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a heat transfer bed top plate capable of maintaining a stable assembled state without deforming the overall shape even if warpage occurs due to shrinkage and expansion of the wood.

It is another object of the present invention to provide a heat transfer bed top plate which maximizes energy consumption efficiency and enables efficient emission of far infrared rays and negative ions, which are beneficial to the human body.

According to an aspect of the present invention, there is provided an air conditioner comprising: a heater plate that generates heat by receiving external power; a sidewall attached to an upper surface of the heater plate; A partition wall for partitioning the space into a plurality of cells, charring grains filled in the inner space of the sidewall and receiving heat radiated from the heater plate to store and discharge heat, A plurality of inner panels having connection grooves and connection protrusions formed on the front and rear surfaces thereof and having coupling protrusions formed on the left and right side surfaces thereof and mounting holes formed on the inner side surfaces thereof and a plurality of inner panels formed between the inner panels and the charcoal particles, A nonwoven fabric attached to the inner panel to block the charcoal particles from flowing out into a mount hole of the inner panels, A ceramic panel which is inserted into each of the mount holes of the inner panels and has a plurality of air vents on the inner side thereof and a ceramic panel which is coupled to the front or rear surface of the outermost inner panel of the inner panels, A front and rear outer panel having coupling protrusions or connection grooves corresponding to the protrusions and having coupling protrusions formed on the left and right side surfaces thereof, and coupling protrusions or coupling protrusions corresponding to the coupling protrusions of the inner panel and the front and rear outer panels, And a left and right outer panel having a coupling groove formed in a shape of a bottom surface of the upper panel.

Thus, even if distortion of the wood occurs due to shrinkage and expansion of the wood, the entire assembly form and outer shape can be maintained in a stable state without being deformed, and a large amount of far-infrared rays and negative ions, which are beneficial to the human body, Can be greatly increased.

In another embodiment of the present invention, further comprising the edge panel covering the four sides of the front and rear, right and left outer panels, and the four sides of the heater plate and the side wall to more effectively cover the inner panel and the front and rear and left and right outer panels It is possible to prevent the overall assembly deformation from being caused by the distortion.

According to an aspect of the present invention, there is provided an image forming apparatus including a plurality of inner panels, a plurality of inner panels, a plurality of outer panels, So that even if warpage deformation occurs due to shrinkage or expansion phenomenon during use, each connection state and gap can be naturally flowed and adjusted as much as the deformation thereof, and as a result, So that the durability and the merchantability can be increased and the convenience of use can be improved.

In addition, not only is it possible to provide a pleasant feeling in addition to the thermal insulation effect by densely filling charcoal particles between an inner panel of a wood material such as a cottonwood, a pine tree, etc. containing a large amount of phytoncide and an outer panel and a heat plate, By virtue of the large amount of far-infrared emission characteristic and the action of the inherent component, highly beneficial effects such as antibacterial, forest bath, sleeping, stress relieving, as well as health promotion of the human body can be obtained.

In addition, even if electric energy is supplied only for a certain period of time due to the inherent physical characteristics of the charcoal particles and the ceramic panel and the heat storage effect and the heat radiation effect, the heat radiated from the heater plate is uniformly transferred while being warmed, It maintains for a certain period of time and dissipates for a long time, so it consumes less power and can maximize energy efficiency.

In addition, charcoal granules, elvan and germanium ceramic panels emit a large amount of far-infrared rays and anions, which are beneficial to the human body. Therefore, it promotes the metabolism of the human body and improves the health by promoting the fomenting effect and blood circulation improvement effect. It is possible to more effectively absorb and block the electromagnetic wave generated when the power is applied from the heating element, thereby minimizing the damage caused by the electromagnetic wave.

1 and 2 are views showing an example of a bed top plate according to a conventional technique.
3 is a plan view of a heat transfer bed top plate according to an embodiment of the present invention.
FIG. 4 is a three-dimensional view showing a state in which a heat transferable bed upper plate according to an embodiment of the present invention is mounted on a bed.
FIG. 5 is a schematic view illustrating a localized portion of a heat transfer type bed top plate according to an embodiment of the present invention.
6 is an exploded perspective view of an inner panel, a left and right outer panel, and a ceramic panel of a heat transfer type bed top plate according to an embodiment of the present invention.
7 is a side cross-sectional view showing a local portion of a heat transfer type bed top plate according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described more specifically with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions of the present invention, and they are to be construed to mean concepts that are consistent with the technical idea of the present invention and interpretations that are commonly or commonly understood in the technical field of the present invention.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

The accompanying drawings are exaggerated or simplified to illustrate and explain the structure and operation of the present invention in order to facilitate understanding and clarity, and it should be understood that each component does not exactly coincide with the actual size.

3 to 6, the heat transfer type bed top plate according to the embodiment of the present invention mainly includes a heater plate 10, a sidewall 20, a partition wall 30, charcoal particles 40, The outer panel 50, the nonwoven fabric 60, the ceramic panel 70, the front and rear outer panel 80, and the left and right outer panels 90.

The heater plate 10 has a rectangular plate shape and generates heat at a constant temperature when receiving external power.

That is, the heater plate 10 has a function of heating the body of the user by heating when the power is supplied. At least one of the heater plates 10 is electrically connected to each other to receive electric power from the outside, .

In the heater plate 10, a heating element (not shown), which generates heat when power is supplied, is stably fixed to the inside of the heater plate 10. The heat is transmitted to the heating element 10 uniformly, The power supply unit 110 is electrically connected to the power supply unit 110.

Here, it is preferable that the surface of the heater plate 10 is formed of a galvanic iron plate or a copper plate plated with a mixture of aluminum and zinc, which has corrosion resistance and heat resistance and is excellent in heat transfer efficiency. In the heating element, It is possible to employ a so-called unshielded line having a small occurrence of the short circuit.

Further, on the surface of the heater plate 10, a special melting apparatus is used to melt the molten component with oxygen acetylene flame and sprayed on the metal surface with compressed air, and the ceramic plate is subjected to a ceramic coating treatment to reinforce heat resistance and the like. It is possible to heat in a short time without heat loss due to the far-infrared ray emission.

The sidewall 20 is attached to the upper surface of the heater plate 10 at a predetermined height through a bonding process or the like so as to fill and protect the charcoal particles 40.

The sidewall 20 is formed by processing wood having a large amount of phytoncide such as cottonwood, cedar, pine and pine, into a plate shape.

The partitioning wall 30 divides the internal space of the site wall 20 into a plurality of cells 35.

The partitioning wall 30 is disposed between the inner edges of the sidewall 20 and in the rims thereof so that a plurality of flesh-like pieces cross each other like a three-sided door or a honeycomb.

That is, the partitioning walls 30 can divide the sidewall 20 into several chambers and fill the charcoal particles 40 to maintain a more stable and efficient charging state. In addition, when the charcoal particles 40 are moved, It is possible to freely flow or prevent the liquid from leaning to one side.

The charcoal particles 40 are densely packed in the cells 35 formed in the inner space of the sidewall 20 to receive the heat radiated from the heater plate 10 to heat and discharge the heat and to maximize the heating efficiency .

In addition to the function of improving the heat insulating property of the heater plate 10 due to heat and heat, such charcoal particles 40 emit anions and far-infrared rays beneficial to the human body due to the inherent characteristics of the carbon material, It acts not only to block and absorb harmful wounds but also to function and play a role in maintaining a pleasant environment such as eliminating odors by decomposing and purifying toxins in the air through activation of enzymes.

In addition, due to the unique characteristics of charcoal, humidity control is excellent, so that warm air containing moisture is saturated in a cold place, causing condensation phenomenon, and various effects such as prevention of various bacteria and fungus caused by the condensation can be obtained at the same time.

The charcoal particles 40 may be added with a small amount of ocher powder, elvan powder or germanium powder which can emit far-infrared rays to activate the bodily rhythm of the human body to promote blood circulation.

Further, the char coal 40 is formed into a granule having a diameter of about 2 to 15 mm by using a granulator or a ball molding machine and drying a char powder obtained by mixing at least one of activated carbon, Or may be obtained by crushing char and forming it into a bead or a rhombus shape.

A plurality of inner panels (50) are connected to the upper surface of the side wall (20) while covering the charcoal particles (40).

Connection grooves 51 and connection projections 52 of a shape corresponding to each other are formed on the front and rear surfaces of the inner panel 50. Connecting projections 55 are formed on the right and left side surfaces of the inner panel 50, And an elliptical mount hole 57 having a notch (not shown) for supporting the ceramic panel 70 is formed on the inner peripheral wall surface.

Such an inner panel 50 is formed by processing a wooden plate containing a large amount of phytoncide such as a plain wood, a cedar, a pine and a pine, thereby realizing a luxurious decorative effect. In addition, The heater plate 10 and the charcoal particles 40 are prevented from being injured such as burns due to direct contact with the heater plate 10 and the charcoal particles 40. [

The nonwoven fabric 60 is attached between the inner panels 50 and the charcoal particles 40 to prevent the charcoal particles 40 from flowing out and being lost through the mounting holes 57 of the inner panels.

That is, the nonwoven fabric 60 is made of fine fiber yarn and adhered to the bottom surface around the mount hole 57 of the inner panel 50 using an adhesive or the like, so that moisture can flow and flow into the charcoal particles 40 by the fine pores As well as particles of minute charcoal powder or particles of charcoal particles 40 are covered with the mounting hole 57 and the air vent 71 of the ceramic panel 70 While minimizing the heat generation loss of the heater plate 10 while preventing the heat plate 10 from coming out.

The ceramic panel 70 is inserted into the mounting holes 57 of the inner panels 50, respectively.

A plurality of air vents 71 are formed on the inner side of the ceramic panel 70.

Since the ceramic panel 70 stimulates and pressurizes the menstrual region and the like of the human body and air flows smoothly through the plurality of air vents 71 communicating with the lower charcoal grains 40, The effect can be obtained.

That is, the ceramic panel 70 is inserted into the mount hole 57 of the inner panel using an adhesive or the like, and is emitted from the charcoal particles 40 through a plurality of air vents 71, The anion and the far-infrared ray are emitted smoothly and efficiently, and the anion and the far-infrared ray which are heated by the heat transfer generated from the heater plate 10 and are also beneficial to the human body are diverged together.

Here, the ceramic panel 70 is preferably formed by mixing the elvan powder and the germanium powder in a ratio of 1: 1 and firing the powder at about 1100 to 1200 ° C. For example, when the total composition ratio is 100%, 50% of the elvan powder and 50% of the germanium powder can be mixed.

The front and rear outer panels 80 are attached to the upper surface of the sidewall 20 through a bonding process or the like so as to be engaged with the front surface or the rear surface of the inner panel 50 positioned at the outermost of the inner panels 50.

The front or rear outer panel 80 is provided with a coupling protrusion 82 or a coupling groove 81 having a shape corresponding to the coupling groove 51 or the coupling protrusion 52 of the inner panel, And engaging protrusions 85 are formed respectively.

The front and rear outer panels 80 are formed by processing a wood containing a large amount of phytoncide such as a white wood, a cedar, a pine and a pine.

The left and right outer panels 90 are positioned to engage with the left and right side surfaces of the inner panels 50 and are attached to the upper surface of the side walls 20 through a bonding process or the like.

The coupling projections 52 of the inner panels 50 and the coupling projections 82 of the front and rear outer panels 80 are formed with coupling grooves 91 of a corresponding shape on the side surfaces thereof.

The engagement protrusions 55 and 85 are formed on the left and right side surfaces of the inner panel 50 and the right and left outer panel 80 respectively and the side surfaces of the right and left outer panels 90 The coupling protrusions 55 and 85 and the coupling grooves 91 corresponding to the coupling protrusions 55 and 85 are formed. However, the coupling protrusions 55 and 85 may be formed opposite to each other.

When the inner panels 50 are continuously connected in the lateral direction, one of the left and right outer panels 90 is positioned between one side of the inner panels 50 and the other side of the opposite inner panels 50 The coupling protrusions 55 of the first panel and the coupling recess 91 having the shape corresponding to the coupling protrusions 85 of the front and rear outer panel 80 may be formed on the left and right sides thereof.

The left and right outer panels 90 are formed by processing a wood containing a large amount of phytoncide such as cottonwood, cedar, pine and pine, in the same manner as the front and rear outer panels 80.

In the present invention, the edge panels (80, 90) are installed in such a manner that they cover the four sides of the front and rear outer panels (80, 90) and the side surfaces of the heater plate (10) 100). ≪ / RTI >

This edge panel 100 covers the four sides of the front and rear outer panels 80 and 90 and the four sides of the heater plate 10 and the side wall 20 to limit the flow to a certain extent, It is possible to prevent twisting deformation of the front panel 50 and the front and rear left and right outer panels 80 and 90.

The upper surface of the edge panel 100 is connected to an external commercial power source to receive power, converts the power to an appropriate output voltage and current amount corresponding to the power consumption of the heater plate 10, and supplies the converted power to the heater plate 10 A power supply unit 110 is provided.

Here, the power supply unit 110 may be selected from an AC power supply system or a DC power supply type power supply system, but it is preferable to configure a DC power supply type power supply system capable of reducing the generation of electromagnetic waves.

In addition, the power supply unit 110 may be connected to the power supply unit 110 in various situations such as when the power supply is turned on or off, when the heater plate 10 is heated to a set temperature or more, or when the electrical connection is cut off by the temperature sensor, And a lamp (not shown) may be provided for displaying the information.

The power supply unit 110 is provided with a controller (not shown) for controlling the operation of the heater plate 10 and the temperature of the heat generated by the heater and controlling the supply of the power. In addition, D converter, or when power is supplied or cut off, or when the heater plate 10 is overheated to a temperature higher than the set temperature, or when electrical connection is blocked by a temperature sensor (bimetal) or when heating is completed And may be provided with a display window for displaying them according to circumstances.

The sidewall 20, the inner panel 50, the front and rear outer panels 80 and 90, and the edge panel 100 are formed of wood containing phytoncide components. In other words, any one of the timber trees, which are nature-friendly, purifying the air of the room and having a strong antibacterial action and having high-function phytoncide components, such as whitewood, cedar, pine and pine trees, And is assembled using a plate material that is cut and cut.

Here, by using the water content of the wood in the range of 10 to 20%, preferably the moisture content of 15%, the release of phytoncide can be made more smoothly, and the whitewood is preferable as the optimum embodiment, Pine trees, pine trees, or a combination of two or more of them may be used.

Charcoal powder may be coated on the inner surfaces of the inner panel 50 and the front and rear outer panels 80, 90. The charcoating layer thus formed prevents or delays corrosion and releases far infrared rays and anions that are beneficial to the human body. It suppresses the generation of bacteria through humidity control and odor removal, The functionality can be obtained, and the durability can be doubled.

Heat loss can be minimized during heat generation by interposing a separate heat insulating material such as urethane foam between the heater plate 10 and the bottom of the bed.

The heat transferable bed upper plate according to the embodiment of the present invention having the inner panels 50 and the connection grooves 51 having the front and rear and right and left outer panels 80, 81 and the coupling protrusions 52 and 82 and the coupling groove 91 and the coupling protrusions 55 are connected and coupled in an interference fit manner so that even if distortion is caused due to shrinkage and expansion phenomenon during use, The gap can be naturally flowed and adjusted so that the overall assembly shape and contour can be maintained in a stable state without deformation.

7, the inner panels 50 may be formed to be male and female so that the connection grooves 51 on one inner panel 50 and the connection protrusions (not shown) on the other inner panel 50 adjacent thereto 52 are mutually coupled to each other, even if distortion of the inner panels 50 occurs due to contraction and expansion during use, the connection intervals of the inner panels 50 are naturally flowed and adjusted so that the inner panels 50 are lifted and opened And the like can be prevented.

When external power is supplied to the heater plate 10 for a predetermined period of time, heat is dissipated by the charcoal grains 40 and the heat is dissipated for a long time. Therefore, the power consumption is very low and the energy efficiency can be maximized. It is not necessary to supply power and it is possible to prevent the user from being exposed to electromagnetic waves.

That is, depending on the physical characteristics of the ceramic panel 70 attached to the inner panel 50 and the charcoal particles 40 charged between the heater plate 10 and the inner panel 50 and the outer panel 80, The power consumption can be minimized because a heat storage operation that maintains a high temperature for about 3 hours can be performed even if the power is applied for only about 6 minutes.

Since the charcoal particles 40 and the ceramic panel 70 emit a large amount of far-infrared rays and anions beneficial to the human body, it promotes the metabolism of the human body and activates the physiological action to help promote health, The electromagnetic wave generated when the power is applied is effectively absorbed and cut off.

Furthermore, since the inner panel 50 and the front and rear outer panels 80 and 90 are formed by processing wood containing a large amount of phytoncide such as plain wood, cedar, pine and pine, Not only can it provide comfortable and comfortable feeling of use, but also the effects of antibacterial, forest bath, sleeping, stress relieving and the like can be obtained at the same time as health promotion of the human body due to the physical properties and active action of the inherent ingredients.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Various changes and substitutions may be made without departing from the spirit and scope of the invention. It can be changed to an embodiment.

For example, it is apparent to those skilled in the art that the present invention can be applied to an inner wall or a bottom plate such as a top plate or a dry sauna booth, a dry half bath, a dry foot bath, or the like.

Therefore, it is intended that the present invention cover modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: heater plate 20: side wall
30: Partitioning month 35: Cell
40: Charcoal granules 50: Inner panel
51: connection groove 52: connection projection
55: engaging projection 57: mount hole
60: nonwoven fabric 70: ceramic panel
71: air vent 80: front and rear outer panel
81: connection groove 82: connection projection
85: engaging projection 90: left and right outer panel
91: coupling groove 100: edge panel

Claims (2)

A heater plate which generates heat by receiving external power;
A sidewall attached to an upper surface of the heater plate;
A partitioning wall dividing an internal space of the side wall into a plurality of cells;
A charcoal pellet which is charged in the inner space of the side wall and receives heat radiated from the heater plate to store and discharge heat;
An inner panel having a plurality of connecting grooves and connecting protrusions formed on the front and rear surfaces thereof and having coupling projections formed on the right and left side surfaces thereof and mounting holes formed on the inner side thereof to cover the charcoal particles;
A nonwoven fabric attached between the inner panels and the charcoal particles to prevent the charcoal particles from flowing out into the mounting holes of the inner panels;
A ceramic panel inserted into each of the mount holes of the inner panels and having a plurality of air vents inside;
A connection protrusion or connection groove having a shape corresponding to the connection groove or the connection protrusion of the inner panel is formed on the front surface or the rear surface of the inner panel so as to be coupled to the front surface or the rear surface of the outermost inner panels of the inner panels Front and rear outer panels having coupling projections formed on left and right sides, respectively; And
A left and right outer panel attached to an upper surface of the sidewall so as to engage with left and right side surfaces of the inner panels and having coupling grooves corresponding to the coupling protrusions of the inner panels and the side surfaces facing the coupling protrusions of the front and rear outer panels;
And a heat-transferable bed top plate.
The method according to claim 1,
An edge panel covering the four sides of the front and rear and left and right outer panels and the four sides of the heater plate and the side wall;
Further comprising a heat transfer bed top plate.

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