KR101002366B1 - Far infrared heater for desk - Google Patents

Abstract

In the present invention, the far infrared rays can be radiated according to the heat dissipation of the heater, and installed in the inner corners of the top plate and the rear plate of the desk to adjust the inclination in a predetermined angle range, in addition to the unique heating function according to the heating of the heater. Disclosed is a far-infrared heating apparatus for a desk, which can promote health of a user by the action of abundant far-infrared rays radiated from a far-infrared heat sink and greatly improve the convenience of use.

Far infrared ray, heater, desk, tilt adjustment

Description

Far infrared heater for desk {Far infrared heater for desk}

The present invention relates to a far-infrared heating device for a desk, and more particularly, to allow far-infrared rays to be radiated according to heat dissipation of a heater, and to be installed at the inner edges of the upper and rear plates of the desk to adjust the tilt in a predetermined angle range. In addition to the inherent heating function according to the heat generated by the heater, the far-infrared radiation radiated from the far-infrared heat sink enables the user's health promotion and greatly improves the convenience of use. will be.

In general, infrared rays are classified into near-infrared, mid-infrared, and far-infrared rays according to the length of the wavelength, and have physical properties such as straightness, reflectivity, transmittance, and absorptivity. In addition, such an infrared ray is characterized in that it is directly irradiated to the object by the nature of the electromagnetic wave in the absence of the transmission medium to generate heat.

Far infrared rays having a long wavelength (usually 25㎛ or more) among these infrared rays are invisible and have strong penetrating power, and are well absorbed by materials, and have strong resonance and resonance effects on organic compound molecules. It helps to get rid of germs that cause various diseases due to heat action, and it helps to expand blood capillaries to help blood circulation and cell tissue generation, and various adult diseases such as anti-aging, activation of metabolism, and chronic fatigue by activating cell tissue. Since it is known that it is effective in prevention, proposals for applying to various types of heating devices have been made.

On the other hand, in recent years there is a need for a desk heating device that can be installed and used in the interior space of the desk that is applied in the office room as well as a reading room, accordingly, various types of desk heating devices have been developed, for example, the Republic of Korea A model registration No. 20-0346551 has been proposed.

Prior art of the Utility Model Registration No. 20-0346551 is a heater body portion; It is provided inside the heater body and has a carbon fiber heating paper, an electrode for applying electricity to the carbon fiber heating paper, and an insulating member for hermetically wrapping the carbon fiber heating paper and the pair of electrodes from the outside. Planar heating element; A heat dissipation cover mounted to an opening of the heater body to dissipate heat from the planar heating element to the outside; It relates to a planar heating element desk heater comprising a mounting member for mounting the heater body in a predetermined installation position.

However, such a prior art has the disadvantage that the infrared radiation of the heater is not made at all or extremely insignificant in the process of heating the heater to promote the health of the user, and when installed on the desk, the angle adjustment function is not provided. Therefore, there is a problem that use is very inconvenient.

The present invention is to solve such a conventional problem, its purpose is to allow the far infrared rays to be radiated according to the heat dissipation of the heater, in addition to the intrinsic heating function according to the heating of the heater in addition to the action of the rich far infrared rays radiated from the far infrared heat sink It is to provide a new far-infrared heating device for the desk to promote the user's health.

Another object of the present invention relates to a far-infrared heating device for a desk to be installed in the inner corners of the top plate and the back plate of the desk to adjust the inclination in a predetermined angle range to greatly improve the convenience of individual heating in the office space, etc. .

Far-infrared heating apparatus for a desk according to the present invention to achieve the above object has a size and depth according to the design, the front of the opening, the inner case upper and lower mounting rods installed across the case; A thin aluminum plate is bent into a "⊃" cross-sectional shape, and is fixed and installed on the bottom surface of the case through a plurality of insulating blocks with the upper end and the lower end fitted to the mounting rods on the case. A reflecting plate on which fitting pieces of a predetermined width protrude from the outer ends of the upper and lower surfaces toward the center; It is made of a plate shape of a size that can be fitted to the front surface of the reflecting plate, the far-infrared radiation coating material is applied to the front surface, and the fitting groove is formed along the edge surface of the upper and lower ends, while forming a fitting groove, the transverse direction of the rear surface A far infrared heat sink having a heater mounting groove formed on the center line; A cartridge heater inserted into and coupled to the heater mounting groove on the far-infrared heat dissipation plate and generating heat according to the application of power; A pair of first brackets which are fastened to both left and right outer surfaces of the case and installed at upper and lower portions on a longitudinal center line to protrude outwardly of the guide boss and the center of rotation; In the state arranged outside the first bracket, the upper end is fixed to the bottom surface of the upper plate of the desk, the lower end is fixedly installed on the inner surface of the back plate perpendicular to the upper plate, the arc shape on the surface corresponding to the guide boss on the first bracket A guide hole having a second bracket having a bearing hole formed on a surface corresponding to the central axis of rotation on the first bracket; It is disposed on one side of the front of the case, and includes a control unit having an operation switch for controlling the power applied to the device from the outside and a temperature controller for adjusting the heating temperature of the cartridge heater.

In the present invention, the far-infrared radiation coating material applied to the far-infrared heat radiation plate is 25 to 30 parts by weight of polymerized phosphate, 25 to 35 parts by weight of carboxymethyl cellulose salt, 15 to 25 parts by weight of silicate, 2 to 3 parts by weight of surfactant, ethanol amines 2 to 3 parts by weight, and 25 to 30% by weight of far infrared resin composition consisting of 20 to 25 parts by weight of water, 65 to 75 parts by weight of silica sand, 5 to 10 parts by weight of tourmaline, and 70 to 75 parts of far infrared radiation powder composed of 20 to 25 parts by weight of silica. It is characterized by consisting of weight percent.

In the present invention, a predetermined position of the front of the case to detect the proximity of the human body in the state electrically connected to the operation switch on the control unit to automatically turn the operation switch "OFF" if the human body is not detected for a predetermined time The human body sensor has a feature installed.

In the present invention has a feature that the safety grill is installed on the front of the case corresponding to the outside of the far infrared heat sink.

According to the present invention, since abundant amounts of far infrared rays are radiated from the far-infrared radiation coating material applied on the far-infrared heat dissipating plate according to the heat dissipation of the heater, in addition to the inherent heating function due to the heating of the heater, As a result, it is possible to promote health of the user.

In addition, since the inclination can be arbitrarily adjusted in a predetermined angle range by installing at the inner corners of the upper plate and the rear plate of the desk, there is an effect that the convenience of heating at the time of individual heating in the office space is greatly improved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a far-infrared heating apparatus for a desk according to the present invention, Figure 2 is a perspective view of a race condition of the far-infrared heating apparatus for a desk according to the present invention, Figure 3 is an enlarged cross-sectional view of the combined state of the far-infrared heating apparatus for a desk according to the present invention. 4 is a side cross-sectional view showing a state in which a far-infrared heating apparatus for a desk according to the present invention is installed at corners of a top plate and a rear plate of a desk, and FIG. 5 is a side showing an angle adjustment state of the far-infrared heating apparatus for a desk according to the present invention. It is a cross section.

Referring to this, in the far-infrared heating apparatus 10 for desks according to the present invention has a size and depth determined according to the design, the front is opened, the case 14 of the enclosure type installed across the mounting rod 12 in the upper and lower inner surface. ) Is provided.

In the present invention, a separate reflector 20 is configured to be housed inside the case 14. At this time, the reflecting plate 20 is made of a structure in which a thin aluminum plate is bent into a "⊃" -shaped cross-sectional shape, the upper end and the lower end of the reflecting plate 20 is fitted to the mounting rod 12 on the case 14 is configured to be coupled do. The inner surface of the reflecting plate 20 is configured to be fixed and installed on the bottom surface of the case 14 via a plurality of heat insulating blocks 16, and is centered from the outer ends of the upper and lower surfaces of the reflecting plate 20. Towards the fitting piece 18 having a predetermined width is configured to protrude.

In the present invention, the far infrared heat sink 28 is inserted into the front portion of the reflecting plate 20, and the rod-shaped cartridge heater 30 is inserted into the rear surface of the far infrared heat sink 28 to generate heat according to the application of power. It is configured to be. To this end, the far-infrared heat dissipation plate 28 is formed in a plate shape of a size that can be fitted to the front portion of the reflecting plate 20, and is fitted to the fitting piece 18 on the reflecting plate 20 along the edges of the upper and lower ends thereof. Being fitted groove 24 is formed. In addition, the far-infrared radiation coating material 22 is applied to the front surface of the far-infrared heat dissipation plate 28, and the heater mounting groove 26 to which the cartridge heater 30 is fitted is installed on the horizontal center line of the rear surface.

In the present invention, the left and right outer surfaces of the case 14 are fixed and coupled to the first bracket 36, which is provided separately, and the upper and lower guide bosses on the longitudinal center line of the first bracket 36, respectively. 32) and the center of rotation 34 is installed to protrude outward. Outside the first bracket 36, separate second brackets 44 are disposed in surface contact with each other are coupled. And, the second bracket 44 is configured so that the upper end is fixed to the bottom surface of the upper plate 38a of the desk 38, the lower end is fixed to the inner surface of the rear plate 38b orthogonal to the upper plate 38a, An arc-shaped guide hole 40 is formed on a surface corresponding to the guide boss 32 on the first bracket 36, and a bearing hole is formed on a surface corresponding to the rotation center shaft 34 on the first bracket 32. 42 has a formed structure.

In the present invention, the front side of the case 14, the control unit having an operation switch 46 for controlling the power applied to the device from the outside and a temperature controller 48 for adjusting the heat generated temperature of the cartridge heater 30 ( 50) is arranged.

As the far-infrared radiation coating material 22 applied to the far-infrared heat dissipating plate 28 in the present invention thus formed, 25 to 30 parts by weight of polymerized phosphate, 25 to 35 parts by weight of carboxymethyl cellulose salt, 15 to 25 parts by weight of silicate, interface 25-30 weight% of far-infrared resin composition which consists of 2-3 weight part of active agents, 2-3 weight part of ethanolamines, and 20-25 weight part of water, 65-75 weight part of silica sands, 5-10 weight part of tourmaline, and 20-25 weights of silica Material consisting of 70 to 75% by weight of far-infrared radiation powder consisting of parts by weight is applied.

The coating material is preferably composed of 25 to 30% by weight of far-infrared resin and 70 to 75% by weight of far-infrared radiation powder, and when the mixing amount of the far-infrared resin is less than the range defined above, there is a fear that the bonding strength of the far-infrared radiation powder is lowered. When the blending amount of the far-infrared resin exceeds the range defined above, the blending amount of the far-infrared radiation powder is relatively small, which may lower the far-infrared radiation effect.

In the far-infrared resin composition, the polymerized phosphate prevents oxidation resistance of the coating layer coating film and improves durability. The polymerized phosphate that can be used in the present invention is metaphosphate (MPO ₃ ) _n , n = 4 to 18 m. = metal ion), pyrophosphate (P ₂ O ₇ ), ultra (polymeta) phosphate (Ultra (Poly meta) Phosphate (MPO ₃ ) _n , n = 8-18 m = metal ion), poly phosphate ( Polyphosphates (P ₃ O ₁₀ )) It is preferable to select one or more and use within the above mixing amount range.

In addition, the carboxymethyl cellulose salt functions to improve the heat resistance of the far-infrared resin, and the carboxymethyl cellulose salt usable in the present invention is aluminum carboxymethyl cellulose, titanium carboxy methyl cellulose, sodium carboxymethyl It is preferable to select 1 type or more from cellulose etc., and to use within the said mixture amount range.

In addition, the silicate generally has a high melting point, and serves to improve the heat resistance of the far-infrared resin, and is preferably used within the above-described mixing amount range.

In addition, the surfactant used in the present invention serves to improve the mixing properties by preventing the separation of the far-infrared radiation powder and water, the surfactant usable in the present invention is cationic or anionic, or positive or nonionic It is preferable to select and use within the said mixture amount range.

Examples of specific surfactants include higher alkyl sulfonate soaps, higher alkyl dicarboxylates, higher alcohol sulfate ester salts, higher alkyl sulfonate salts, higher alkyl disulfonate salts, higher alkyl phosphate ester salts, and monoalkylated sulfate ester salts of higher fatty acid amides. , Alkylated sulfonates of higher fatty acid amides, alkyl carboxylates of higher alkyl sulfonamides, alkylbenzene sulfonates, alkyl phenol sulfonates, alkyl naphthalem sulfonates, alkyl benzoimidazole sulfonates, naphthenates, naphthenyl alcohol sulfates It is preferable to mix and use 1 type or more from the group which consists of a salt, a resin acid salt, resin acid alcohol sulfate ester salt, and lignin sulfonate.

In addition, ethanol amines used in the present invention serves to improve the physical properties of the emulsification and corrosion protection in the far-infrared resin composition, ethanol amines usable in the present invention in the ethanolamine, diethanolamine or triethanolamine within the above mixed amount range It is preferable to use 1 type or more in mixture.

And the far-infrared radiation powder is made of 65 to 75 parts by weight of silica sand, 5 to 10 parts by weight of tourmaline, 20 to 25 parts by weight of silica in order to further increase the radiation efficiency, the average particle diameter is preferably 0.1 ~ 10㎛.

The silica sand used in the present invention functions to radiate far infrared rays and energy, and it is preferable to use far infrared rays and energy within the above mixing amount in consideration of radiation efficiency.

In addition, the tourmaline used in the present invention stimulates acupuncture points with a weak current and removes air purification and odor by anion release and far-infrared radiation, and when the amount of tourmaline is less than the above range, the amount of anion released There exists a possibility that it may fall, and when it exceeds the range defined above, the mixing amount of silica etc. will become comparatively small, and there exists a possibility that the radiation amount of far-infrared emission energy may fall.

In addition, in the present invention, silica functions to emit the largest far infrared ray emission energy over the electric field, and when the amount of silica is less than the range defined above, the far infrared ray emission energy may be lowered. If it exceeds the range, the amount of tourmaline or the like mixed relatively decreases, and the amount of anion released may decrease.

Hereinafter, the present invention will be described in detail with reference to the following examples, but the present invention is not necessarily limited to the following examples.

1. Preparation of far-infrared resin and far-infrared radiation powder

Examples 1, 2 and Comparative Example 1 prepared a far infrared resin and a far infrared radiation powder at the compounding ratio as shown in Table 1 below.

(Unit: parts by weight) division Example 1 Example 2 Comparative Example 1 Far Infrared
Suzy Polymeric Phosphate 25 30 - Carboxy
Methyl Cellulose Salt 35 25 - Silicate 15 20 10 Surfactants 3 2 - Ethanol Amine 2 3 - water 20 20 - Acrylic resin - - 90 Far Infrared
Spinning powder Quartz sand 65 75 50 Tourmaline 10 5 15 Silica 25 20 35

2. Preparation of Far Infrared Radiation Coating

Far-infrared radiation coating material was prepared using the far-infrared resin and the far-infrared radiation powder of Examples 1, 2 and Comparative Example 1.

(Example 1)

A far infrared ray radiation coating material was prepared by mixing 25 wt% of the far infrared resin prepared as shown in [Table 1] and 75 wt% of the far infrared radiation powder.

(Example 2)

The far infrared radiation coating material was prepared by mixing 30 wt% of the far infrared resin prepared as shown in [Table 1] and 70 wt% of the far infrared radiation powder.

(Comparative Example 1)

A far-infrared radiation coating material was prepared by mixing 30 weight% of a far-infrared resin and 70 weight% of a far-infrared radiation powder using an acrylic resin generally used as a far-infrared resin as shown in [Table 1].

3. Evaluation of Far Infrared Radiation Coatings

Using the Examples 1, 2 and Comparative Example 1 prepared as described above to produce a specimen (sus 24) by coating on the far-infrared heat sink, respectively, and coating the surface with a thickness of 30㎛ and then emissivity, radiation energy, heat Deformation temperature and appearance were measured and the results are shown in [Table 2].

division Example 1 Example 2 Comparative Example 1 Emissivity
(5 ~ 20 ㎛) 40 ℃ 0.920 0.925 0.902 350 ℃ 0.891 0.898 0.883 Radiant energy
(W / cm 2 · μm, 40 ° C) 40 ℃ 3.70 × 10 ² 3.90 × 10 ² 3.50 × 10 ² 350 ℃ 6.82 × 10 ³ 6.94 × 10 ³ 4.97 × 10 ³ Heat Deflection Temperature (℃) 380 380 85 Exterior ◎ ◎ ×

* Test Methods

1) Emissivity and radiation energy: Measured according to KFIA-FI-1005.

2) Heat distortion temperature was measured according to ASTM D-648.

3) Appearance: After measuring the emissivity and the radiant energy at 350 ℃, the flow marks, surface roughness and coating material peeling of the specimen were visually determined. (Very good ◎, good-○, normal-△, poor -X)

As shown in Table 2, Examples 1 and 2 exhibited high emissivity and radiation energy at temperatures of 40 ° C. and 350 ° C., respectively, and heat at high temperatures of 300 ° C. or higher in the heat deflection temperature measurement for checking heat resistance. No deformation occurred, and it can be seen that the temperatures at which thermal deformation started were from 380 ° C., respectively. In addition, the uniform surface was maintained without peeling off the coating material. However, in Comparative Example 1, an acrylic resin was used as a far-infrared resin in the heat deflection temperature measurement for measuring heat resistance, and 50 parts by weight of silica sand was added as far-infrared radiation powder, and 15 parts by weight of tourmaline was added. , 35 parts by weight of silica was mixed with the addition exceeding the range defined in the present invention and tested with a far-infrared radiation coating material, the heat deformation began to occur at 85 ℃, the flow occurs even in its appearance, the surface is not uniform and roughly changed And, the coating material was also confirmed that some peeling occurred.

In addition, in the present invention, the human body sensor 52 is installed in a predetermined position on the front surface of the case 14 is configured so that the power applied to the cartridge heater 30 is cut off when the approach of the human body is not detected for a predetermined time. At this time, the human body sensor 52 is electrically connected to the operation switch 46 through a conventional controller such as a microcomputer.

On the other hand, in the present invention, the safety grill 54 is installed on the front surface of the case 14 corresponding to the outside of the far-infrared heat sink 28, the wire cord is connected to the plug to the cartridge heater 30 is connected to the external power source 56 is connected to the controller 50,

The operation of the present invention made as described above is as follows.

In order to assemble a far-infrared heating apparatus for a desk according to the present invention, as shown in FIG. 1, the reflecting plate 20 is provided inside the case 14 in a state in which a plurality of insulating blocks 16 are disposed on the bottom surface of the case 14. Insert the grooves formed at the edges of the upper and lower ends of the reflector plate 20 into the mounting rods 12 installed across the case 14, and then insert the screws from the rear side of the case 14. The inner heat insulating block 16 and the reflecting plate 20 are fastened at the same time. In this state, the rod-shaped cartridge heater 30 is coupled to the heater mounting groove 26 formed on the rear surface of the far-infrared heat sink 28, and is formed along the edges of the upper and lower ends of the far-infrared heat sink 28. When the fitting groove 24 is fitted to the fitting piece 18 protruding toward the center from the upper end and the lower end of the reflecting plate, the coupling of the far infrared heat sink 28 is completed. Then, by fitting the safety grill 54 to the front of the case 14 corresponding to the outside of the far infrared heat sink 28, the assembly of the heating device itself is completed.

On the other hand, when the far-infrared heating device assembled as described above is to be installed at the bottom of the upper plate 38a of the desk and the corners of the rear plate 38b, first, a pair of first brackets 36 are provided on both sides of the case 14. Fasten with screws while wrapped in Then, the fastening surfaces formed on the upper end and the lower end of the pair of second brackets 44 are fixed to the bottom of the upper plate 38a of the desk and the fixed positions of the rear plate 38b by screws, respectively, and the case 14 The guide boss 32 and the rotation center shaft 34 on the first bracket 36 coupled to both sides are fitted to the guide hole 40 and the bearing hole 42 on the second bracket 44, respectively, and the second When a separate nut is inserted into the guide boss 32 and the center of rotation shaft 34 protruding outwardly through the guide hole 40 and the bearing hole 42 of the bracket 44, the far-infrared heating device for the desk Installation is complete.

In this state, when the operation switch 46 is turned "ON" while the plug on the wire cord 56 is connected to an external power source, the external power is applied to the cartridge heater 30 while the cartridge heater 30 is applied. ) Is heated.

The heat generated from the cartridge heater 30 is conducted to the far infrared heat sink 28 made of aluminum having excellent conductivity to heat the far infrared heat sink 28, and when the far infrared heat sink 28 is heated, While heat-exchanging and warming the surroundings, abundant amounts of far-infrared rays are radiated to the surroundings from the far-infrared radiation coating material 22 applied to the front surface of the far-infrared heat sink 28.

On the other hand, the heat transmitted to the inside of the case 14 is mostly reflected forward by the reflecting plate (20).

When the human body sensor 52 is installed in the far-infrared heating apparatus 10 for the desk according to the present invention, the user is continuously operated in a state in which the user is close to the heating apparatus while the power is operated to "ON", and the user is heated. When the set time has elapsed from the device 10, the automatic switch 46 is automatically cut off by the signal output from the human body sensor 52.

In the present invention, the safety grill 54 is narrow in the lower space of the desk, and when the user is sitting in a chair attached to the desk to prevent a part of the body, such as the knee directly contacting the far infrared heat sink 28.

In this way, when the user wants to adjust the inclination of the heating device 10, the guide boss 32 and the second bracket on the second through the guide hole 40 on the bracket as shown in Figure 4 and 5 When the nut that holds the rotation center shaft 34 inserted through the bearing hole 42 is slightly loosened, the upper part of the case 14 is grasped and pulled forward or pushed backward, so that the guide boss on the first bracket 36 ( 32 is rotated back and forth along the guide hole 40 on the second bracket 44 with the rotation center axis 34 as the zoom center, and the tilt is adjusted, when the heating device 10 reaches the desired slope (guide boss ( 32) Tighten the nut that holds it to complete the adjustment.

1 is an exploded perspective view showing a far-infrared heating apparatus for a desk according to the present invention.

Figure 2 is a perspective view of the combined state of the far-infrared heating apparatus for a desk according to the present invention.

Figure 3 is an enlarged cross-sectional view of the combined state of the far-infrared heating apparatus for a desk according to the present invention.

Figure 4 is a side cross-sectional view showing a state in which the far-infrared heating apparatus for a desk according to the present invention is installed at the corners of the upper plate and the rear plate of the desk.

Figure 5 is a side cross-sectional view showing an angle adjustment state of the far-infrared heating apparatus for a desk according to the present invention.

* Description of the symbols for the main parts of the drawings *

12: mounting rod 14: case

18: fitting 20: reflector

22: far infrared radiation coating material 28: far infrared heat sink

30: cartridge heater 32: guide boss

34: center of rotation axis 36: the first bracket

40: guide ball 44: second bracket.

52: human body detection sensor 54: safety grill.

Claims (4)

A enclosure-shaped case 14 having a size and depth determined according to the design and having a front surface open and a mounting rod 12 intersecting the upper and lower surfaces of the inner surface; A thin aluminum plate is bent in a cross-sectional shape of "⊃", and a plurality of upper and lower ends are fitted to the mounting rods 12 on the case 14 and coupled to the bottom surface of the case 14. A reflector plate 20 fixed and installed via a heat insulating block 16 and having a fitting piece 18 having a predetermined width protruding toward the center from the outer ends of the upper and lower surfaces; It is made of a plate shape of the size that can be fitted to the front surface of the reflecting plate 20, the far-infrared radiation coating material 22 is applied to the front surface, the fitting groove to be fitted to the fitting piece 18 along the edge surface of the upper and lower ends 24 is formed, and a far-infrared heat dissipation plate 28 having a heater mounting groove 26 formed on a lateral center line of the rear surface thereof; A cartridge heater 30 fitted into the heater mounting groove 26 on the far-infrared heat dissipation plate 28 and generating heat according to the application of power; A pair of first brackets 36 are fastened to both outer surfaces of the left and right sides of the case 14, and the guide boss 32 and the central shaft 34 are protruded outward from the upper and lower portions on the longitudinal center line, respectively. )and; In the state disposed outside the first bracket 36, the upper end is fixed to the bottom of the upper plate (38a) of the desk 38, the lower end is fixed to the inner surface of the rear plate (38b) orthogonal to the upper plate (38a) A circular arc-shaped guide hole 40 is formed on a surface corresponding to the guide boss 32 on the first bracket 36, and a bearing hole is formed on a surface corresponding to the rotation center axis 34 on the first bracket 326. A second bracket 44 having a 42 formed thereon; The control unit is disposed on one side of the front surface of the case 14 and includes an operation switch 46 for controlling power applied to the apparatus from the outside and a temperature controller 48 for adjusting the heating temperature of the cartridge heater 30. Comprised of 50), The far-infrared radiation coating material 22 applied to the far-infrared heat sink 28 is 25 to 30 parts by weight of polymerized phosphate, 25 to 35 parts by weight of carboxymethyl cellulose salt, 15 to 25 parts by weight of silicate, and 2 to 3 parts by weight of surfactant. , Far infrared radiation powder composed of 25 to 30% by weight of far infrared resin composition consisting of 2 to 3 parts by weight of ethanol amines, and 20 to 25 parts by weight of water, 65 to 75 parts by weight of silica sand, 5 to 10 parts by weight of tourmaline, and 20 to 25 parts by weight of silica. Consists of 70-75% by weight, A predetermined position in front of the case 14 detects the proximity of the human body in a state electrically connected to the operation switch 46 on the control unit 50, and automatically activates the operation switch 46 if the human body is not detected for a preset time. ) Is installed to detect the human body 52 to "OFF", The safety grill 54 is installed on the front surface of the case 14 corresponding to the outside of the far infrared heat sink 28, The carboxymethyl cellulose salt is a far-infrared heating device for a desk, characterized in that one or more selected from aluminum carboxymethyl cellulose, titanium carboxy methyl cellulose, sodium carboxymethyl cellulose, and the like. delete delete delete

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