KR20040061438A - Heating Device - Google Patents

Abstract

PURPOSE: A heat generation device is provided to secure plural resistance heating areas while having stable supply of heat generation operation voltage and reducing the use of a material. CONSTITUTION: A heat generation device comprises a casing(10) of a heat-resisting material having a hot air exhaust opening(12) to the center area of one of a pair of opposite surfaces each having a normal of a hot air radiation direction; a heat generation plate(20) of a heat-resisting material having plural heat generation holes(22) pierced along the thickness direction; a pair of external connection electrodes(40) each having an opening in the center area; and an automatic temperature control unit(72) controlling voltage supply to the external connection electrodes to uniformly maintain the heating temperature of carbon heat transfer layers of the heat generation plate. The carbon heat transfer layers are formed on the inner surface and heat generation-forming surface of the heat generation holes. Metal electrode layers are formed on the heat generation-forming surface. The heat generation plate is mounted in the casing while the heat generation holes are arranged toward the hot air exhaust opening. The external connection electrodes are separately mounted in an inner space of the casing with the heat generation plate interposed, to have face contact with the outer surface of the metal electrode layer. The external connection electrodes are connected to an external voltage power source through a power supply line(76) arranged in the inner space of the casing.

Description

Heating device {Heating Device}

The present invention relates to a heat generating apparatus, and more particularly, to a heat generating apparatus of an electrothermal method that converts electrical energy into thermal energy.

The heat generating device of the heat transfer method is widely used because it does not need to store fuel, and it is easy to control the temperature, compared to other types of heat generating devices using gas as an energy source. The heat generator type heat resistance device employs a resistance heating method using a joule heat generated when a current flows through a wire or plate resistor.

In the resistance heating type heating device, it is desirable to increase the amount of Joule heat dissipation per unit time so that the target temperature of the heating object can be reached within a short time.

The joule heat dissipation per unit time can be increased by increasing the joule heat generation amount per unit time in the heating element or by increasing the divergent area of the joule heat generated. Increasing the heating operation voltage can increase the amount of Joule heat generated per unit time, but there is a problem that the power equipment cost increases due to the increase in the heating operation voltage.

Here, as one of the methods of increasing the joule heat generation and the diverging area per unit time without increasing the heating operation voltage, it may be considered to form a plurality of resistance heating regions exposed to the outside on the heating element.

When forming a large number of resistance heating zones in the heating element, it is desirable to make use of the limited space occupied by the heating element so that the heating resistance voltage can be stably supplied to each resistance heating region while forming as many resistance heating regions as possible. Do.

At this time, since all the heating elements are formed of the resistive material, the manufacturing cost increases, so it is necessary to form each resistive heating area while reducing the amount of the resistive material used.

Accordingly, it is an object of the present invention to provide a heat generator having a plurality of resistance heating zones in which the heat generating operation voltage is stably supplied and the material usage amount is small.

1 is an exploded perspective view of a heating device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the heating plate shown in FIG. 1.

Explanation of symbols on the main parts of the drawings

10 casing 20 heating plate

22: heating hole 40: external connection electrode

70: blower 80: electrode pressure plate

72: thermostat

According to the present invention, in the heat generating device for radiating heat in a predetermined direction, a heat discharge opening is formed in a central region of one surface of a pair of opposing surfaces made of a heat resistant material and having a normal in the heat radiating direction. A casing formed; A plurality of heat generating holes are formed through the thickness direction, a carbon heat transfer layer is formed on the inner surface and the heat generating hole forming surface of the heat generating hole, a metal electrode layer is formed on the heat generating hole forming surface on which the carbon heat transfer layer is formed. A heating plate mounted in the casing such that the heating hole faces the hot air discharge opening; An opening is formed in a central area, and is separately mounted in the inner space of the casing with the heating plate interposed therebetween so as to be in surface contact with the outer surface of the metal electrode layer formed on the heating plate, and through a power line disposed in the inner space of the casing. A pair of external connection electrodes connected to a predetermined external voltage power source; It is achieved by a heating device characterized in that it comprises a thermostat for controlling the voltage supply to the external connection electrode to maintain a constant heating temperature of the carbon heat transfer layer of the heating plate.

The casing is formed with a blow-in opening facing the hot air discharge opening so as to efficiently move the heat dissipated here toward the heating object; It may be configured to further include a blower for blowing toward the blowing inlet opening formed in the casing.

In order to ensure the safety of the heating device, partitions of the heat-resistant insulating material are disposed along the heat radiation direction to divide the inner space of the casing into a heat generating space and an external connection space, and a temperature control opening is formed in one region. More; Each of the external connection electrodes has a plate contact portion contacting the heating plate and a connection terminal connecting the plate contact portion to the power line, wherein the plate contact portion is located in the heat generating space and the connector is located in the external connection space. Mounted inside the casing; The power line is disposed in an external connection space of the casing; The thermostat is preferably installed to be adjacent to the hot air discharge hole formed in the partition wall.

In addition, an opening corresponding to the air inlet opening and the air exhaust opening of the casing is formed to reduce power consumption due to a poor contact between the external thermal electrode and the heating plate, and is formed in at least one of the external connection electrode and the casing. It is preferable to further include an electrode pressing plate of a heat-resistant insulating material that is mounted to increase the contact force between the heating plate and the external connection electrode.

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

In the heat generating apparatus according to the embodiment of the present invention, as illustrated in FIGS. 1 and 2, a rectangular parallelepiped casing having a square air inlet opening 14 and a hot air exhaust opening 12 formed on the upper and lower surfaces thereof, respectively ( 10) and a heat generating plate 20 which is formed through a plurality of heat generating holes 22 along the thickness direction and is mounted inside the casing 10 so that the heat generating holes 22 face the hot air discharge opening 12; And a pair of external connection electrodes 40 mounted up and down inside the casing 10 with the heating plate 20 interposed therebetween, and a blower 70 blowing toward the blower opening 14 formed in the casing 10. ) And a thermostat 72 which automatically regulates the heating temperature of the heating plate 20 by intermittent voltage supply to the external connection electrode 40.

The casing 10 is made of a heat-resistant material such as a plastic that can withstand a temperature of 300 °, the inner space is connected to the heat generating space 16 and the external space by the partition wall 74 of the heat-resistant insulating material disposed along the vertical direction It is divided into space 17. In the central region of the partition wall 74, a heat discharge hole 75 communicating the heat generating space 16 and the external connection space 17 is formed.

In the heat generating plate 20, the carbon heat transfer layer 26 is formed on the inner surface of the heat generating hole and the heat generating hole forming surface, and the metal electrode layer 24 is formed on the heat generating hole forming surface on which the carbon heat transfer layer 26 is formed. Here, the heating plate 20 may be made of a heat resistant material such as ceramic, and the material of the carbon heat transfer layer 26 may include carbon as a main component and other components used when fabricating cellulose or other carbon film resistance, and the metal electrode layer. As a material of (24), silver (Ag) can be employ | adopted. The carbon heat transfer layer 26 may be formed by depositing the carbon coating liquid in a state where the tape is attached to the side surface of the heating plate 20 and then removing the tape and heating at a temperature of 200-500 ° C. for about 10 minutes. 24 may be formed by an injection method or the like. After the metal electrode layer 24 is formed, the metal electrode layer 24 may be heated at a temperature of 200-500 ° C., and then used as the heating plate 20. The heating temperature of the heating plate 20 is automatically adjusted according to the intermittent operation of the thermostat connected in series with the power line 76 in the hot air discharge hole 75 contact area of the external connection space 17. Here, the thermostat 72 may be configured as a bimetal type using a thermal expansion coefficient of a metal or a magnet type using a magnetic change depending on a temperature such as ferrite.

The external connection electrode 40 is connected to a predetermined external voltage power source 78 through a power line 76 disposed in the external connection space 17 of the casing 10. Each external connection electrode 40 has a plate contact portion 40a which contacts the heating plate 20 and a connection terminal 40b which connects the plate contact portion 40a to the power supply line 76. Openings corresponding to the hot air discharge openings 12 are formed in the central region of the upper external connection electrode 40, and the openings 14 of the casing 10 correspond to the openings 14 of the casing 10 in the central region of the lower external connection electrode 40. An opening to be formed is formed. The external connection electrode 40 is mounted inside the casing 10 such that the plate contact portion 40a is located in the heat generating space 16 of the casing 10 and the connection terminal 40b is located in the external connection space 17. The external connection electrode 40 may be made of copper, and is in surface contact with the outer surface of the metal electrode layer 24 formed on the heating plate 20 in the mounted state. The contact between the external connection electrode 40 and the metal electrode layer 24 is stably maintained by the pressure action of the electrode pressure plate 80 of the heat-resistant insulating material interposed between the casing 10 and each external connection electrode 40. have. Openings corresponding to the hot air discharge openings 12 are formed in the central region of the upper electrode presser plate 80, and openings corresponding to the air inlet openings 14 of the casing 10 are formed in the central region of the lower electrode presser plate 80. Is formed. The electrode pressing plate 80 may be manufactured to have an elastic force with a heat resistant insulating material.

The wind from the blower 70 is blown into the air inlet opening 14 of the casing 10 through an air blowing guide tube 72 of a circular cross section installed in the bracket 72 coupled to the lower portion of the casing 10 by a screw. You are guided.

Referring to the heat generation operation of the heat generating device having such a configuration as follows.

When the user operates the heating device by operating a switch, a voltage is applied between the pair of external connection electrodes 40 and the blower 70 through the power supply line 76 from the external voltage power supply 78. When the operating voltage is supplied to the blower 70, the blowing is started toward the bottom surface of the heat generating plate 20 through the blowing guide opening 72 of the blowing guide tube 72 and the casing 10. At this time, the thermostat 72 is in a connected state.

When a voltage is applied to the external connection electrode 40, a current flows through the metal electrode layer 24 of the heating plate 20 to the carbon heat transfer layer 26, whereby the carbon heat transfer layer 26 is resistance-heated. When the carbon heat transfer layer 26 is resistively heated, heat (far infrared rays) is released from the upper and lower surfaces of the heat generating plate 20 and the inner surface of the heat generating holes 22.

The air heated by the heat emitted from the heat generating plate 20 is moved toward the heating target area through the heat exhaust opening 12 of the casing 10 by the blowing action of the blower 70.

On the other hand, the heat around the heating plate 20 is transmitted to the thermostat 72 through the heat discharge hole 75 formed in the partition wall (74). When the time for which the voltage is applied to the external connection electrode 40 increases, the amount of heat emitted from the heat generating plate 20 increases, and the temperature of the heat emitted through the hot air discharge holes 75 increases. When the temperature of the heat discharged through the hot air discharge hole 75 exceeds the opening temperature of the thermostat 72, the thermostat 72 is cut, that is, off.

When the thermostat 72 is cut, the supply of voltage to the external connection electrode 40 is stopped and the resistance heating operation in the carbon heat transfer layer 26 is stopped.

When the resistance heating operation in the carbon heat transfer layer 26 is stopped, the ambient temperature of the thermostat 72 decreases and the temperature decrease continues. After that, when the predetermined connection temperature is reached, the thermostat 72 is connected again, and the carbon heat transfer layer 26 is heated by resistance through the above-described process.

On the other hand, even if the thermostat 72 is cut, the supply of the operating voltage to the blower 70 continues, so that heat from the heat generating plate 20 continuously moves toward the heating target area.

As described above, a plurality of heat generating holes 22 are formed along the thickness direction of the heat generating plate 20 and the carbon heat transfer layer 26 is formed on the inner surface of the heat generating holes 22, thereby providing a plurality of resistance heating regions (each foot). Tears).

After the carbon heat transfer layer 26 is formed on the inner surface of the heat generating hole 22 and the top and bottom of the heat generating plate 20, the metal electrode layer 24 is formed on the top of the carbon heat transfer layer 26 formed on the top and bottom of the heat generating plate. By forming the heat treatment, heat is generated on the carbon heat transfer layer 26 formed on the inner surface of the heat generating hole 22 through the surface contact between the carbon heat transfer layer 26 and the metal electrode layer 24 formed on the top and bottom surfaces of the heat generating plate 20. By supplying the operating voltage, even if partial defects occur in the carbon heat transfer layer 26 or the metal electrode layer 24, the heating operation voltage can be stably supplied to each resistance heating region (each heating hole).

In addition, since the heat generating plate 20 is made of a heat resistant material such as a ceramic material, the carbon heat transfer layer 26 is formed of a resistor, thereby reducing the amount of use of the resistor material.

On the other hand, in the above-described embodiment, although the thermostat which automatically regulates the thermostat according to the ambient temperature is used, the temperature sensor is installed in the area adjacent to the heat exhaust hole 75 and is externally based on the detected temperature in the temperature sensor. In order to control the heating temperature of the heating plate 20 by intermitting a voltage supply switch (not shown) installed in the voltage power source or a positive temperature thermistor whose resistance value increases as the temperature rises in series with the power line. By connecting the heating temperature of the heating plate 20 can be adjusted.

The above-described heating device according to the present invention can be used alone or by connecting several in series by appropriately adjusting the size of the heating plate.

Therefore, according to the present invention, by forming a resistance heating region on the inner surface of the plurality of heating holes formed along the thickness direction on the heating plate, it is possible to increase the amount of Joule heat per unit time.

In addition, by forming a carbon heat transfer layer connected along the circumferential direction of the resistance heating region and in surface contact with the metal electrode layer, the heating operation voltage can be stably supplied to the resistance heating region.

In addition, by forming the resistance heating zone in the form of a layer, it is possible to reduce the amount of the heating material used, thereby reducing the manufacturing cost.

Claims (5)

In the heat generating device for radiating heat in a predetermined direction, A casing made of a heat resistant material and having a heat exhaust opening formed in a central region of one surface of the pair of opposing surfaces having a normal in the heat radiation direction; A plurality of heat generating holes are formed through the thickness direction, a carbon heat transfer layer is formed on the inner surface and the heat generating hole forming surface of the heat generating hole, a metal electrode layer is formed on the heat generating hole forming surface on which the carbon heat transfer layer is formed. A heating plate made of a heat resistant material mounted in the casing such that the heating hole faces the hot air discharge opening; An opening is formed in a central area, and is separately mounted in the inner space of the casing with the heating plate interposed therebetween so as to be in surface contact with the outer surface of the metal electrode layer formed on the heating plate, and through a power line disposed in the inner space of the casing. A pair of external connection electrodes connected to a predetermined external voltage power source; And a thermostat for controlling a voltage supply to the external connection electrode to maintain a constant heating temperature of the carbon heating layer of the heating plate. The method of claim 1, The casing is provided with a blowing inlet opening facing the hot air exhaust opening; And a blower for blowing toward the air inlet opening formed in the casing. The method of claim 2, A partition of the heat resistant insulating material disposed in the heat radiation direction to partition the inner space of the casing into a heat generating space and an external connection space and having a temperature control opening in one region; Each of the external connection electrodes has a plate contact portion contacting the heating plate and a connection terminal connecting the plate contact portion to the power line, wherein the plate contact portion is located in the heating space and the connection terminal is located in the external connection space. Mounted inside the casing; The power line is disposed in an external connection space of the casing; The thermostat is a heating device, characterized in that installed to be adjacent to the hot air discharge hole formed in the partition wall. The method according to claim 2 or 3, Openings corresponding to the air inlet opening and the hot air exhaust opening of the casing are formed, and a heat resistant insulating material mounted to at least one of the external connecting electrode and the casing to increase the contact force between the heating plate and the external connecting electrode. Heating device characterized in that it further comprises an electrode pressure plate. In a heating element that emits heat when a voltage is supplied from an external voltage power supply, A body portion made of a ceramic material in which a plurality of heat generating holes penetrate along the thickness direction; A carbon heat transfer layer formed on the inner surface of the heat generating hole and the heat generating hole forming surface of the body portion and being resistively heated when a voltage is applied from the external voltage power source; And a metal electrode layer laminated on the carbon heat transfer layer formed on the heat generating pore forming surface of the body part and connected to the external voltage power source through a power line.