KR100738698B1 - Heater having plate type heating element - Google Patents

Abstract

The present invention includes a conductive carbon mixture formed of a material that generates heat when a current is applied, and a pair of insulating sheets coupled to cover the top and bottom surfaces of the conductive carbon mixture, Two or more planar heating elements positioned to be spaced apart at regular intervals in the longitudinal direction; An electrode terminal coupled to the conductive carbon mixture to apply a current; A frame fixing the position of the surface heating element and the electrode terminal; It is formed in a plate shape in order to increase the heat dissipation efficiency, and comprises one or more heat dissipation fins for discharging the heat generated from the planar heating element to the outside by being coupled to each end in contact with the insulating sheet of the adjacent planar heating element, The purpose of the present invention is to provide a heating device configured to change the size of the heating element according to the size of the heating element, to prevent excessive inrush current generation, and to make the temperature distribution of each part uniform.

Heating device, carbon mixture, insulation sheet, heat radiation fins, parallel ℃

Description

Heating device with surface heating element {Heater having plate type heating element}

1 is an exploded view of a conventional automotive auxiliary heating device.

2A is a perspective view of a heating apparatus having a planar heating element according to the present invention.

Figure 2b shows a coupling structure of the planar heating element applied to the present invention.

FIG. 3A illustrates a shape in which a plate-shaped heat dissipation fin is added to the heat generator shown in FIG. 2A.

Figure 3b shows a coupling structure of the heat radiation fins.

4 shows a shape in which each conductive carbon mixture is combined in a series of parallel ° C. structures.

<Description of the symbols for the main parts of the drawings>

100: planar heating element 110: conductive carbon mixture

120: insulating sheet 200: electrode terminal

210: positive electrode terminal 220: negative electrode terminal

230: first electrode terminal 240: second electrode terminal

250: third electrode terminal 260: fourth electrode terminal

300: frame 310: top frame

320: lower frame 400: heat dissipation fin

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus having a planar heating element, and more particularly, to an auxiliary heating apparatus installed on an air moving passage of an automotive air conditioning system for heating air supplied to an automobile interior.

In general, a vehicle is provided with an air conditioner that heats an interior using an engine heat, and is configured to heat each part of the interior of the vehicle through a ventilation system and a ventilation path.

The heat generated from the engine is generated as fuel is burned in the cylinder, and the temperature of the combustion gas is about 2000 ° C to 2500 ° C. This high temperature combustion gas damages the components constituting the engine. In view of this, the temperature of the engine is lowered by circulation of the cooling water so as to maintain an appropriate engine temperature (about 80 ° C to 90 ° C). At this time, since the coolant heat-exchanged with the engine is heated to a high temperature, by using the heat of the heat-exchanged coolant it is possible to heat the interior of the vehicle even without a separate heating device. However, since the heating of the vehicle interior using the heated coolant is possible only after a time elapses after the initial start of the engine, there is a problem that it takes a long time to obtain the heating effect.

For this reason, in winter, the engine is idling for a long time before driving in order to heat immediately upon boarding, which causes inconvenience due to environmental pollution, fuel consumption, and vehicle noise.

Therefore, the proposed heater has been proposed to form a warm air in the auxiliary heater made of a hot wire coil to blow the air into the vehicle interior until the coolant is heated. However, the auxiliary heater method using the heating coil has a problem that the heating effect of the heating coil is large, the heating effect is large, but the risk of fire is high, the life of the heating wire is short, and the parts of the heating coil must be frequently repaired or replaced.

Accordingly, in recent years, studies on new devices that replace heating means such as heating coils have been actively conducted. Among them, a low resistance to fire and a long lifetime have a constant resistance temperature coefficient that can be used semi-permanently. BACKGROUND OF THE INVENTION Positive temperature coefficient thermistors (PTCs), which have a positive temperature, are widely known.

Hereinafter, a conventional automotive auxiliary heating apparatus using a PTC device will be described with reference to the accompanying drawings.

1 is an exploded view of a conventional automotive auxiliary heating device.

The conventional auxiliary heating device for a vehicle is designed to supply warm air to an interior of a vehicle until the engine coolant is heated by being installed on an air movement path of an automobile air conditioning system. The first electrode member 10 having a plurality of through holes 12 are formed at equal intervals in the longitudinal direction on the plate surface and the guide jaw portions 22 on both sides to be fixed to the first electrode member 10. A frame 20 having a fixing part 24 provided at the center plate surface and having a fastening hole 28 formed at equal intervals, and having an opening 26 formed between the fixing parts 24, and the frame ( The combination of the PTC element 30 and the insulator 40 fixed to the first electrode member 10 and the first electrode member 10 and the first electrode member 10 and the PTC element 30 and the insulator 40 from the outside is fixed to 20. The first and second heat sinks 50 which wrap and apply a second electrode to the PTC device 30. a, 50b, and heat dissipation fins 60 coupled to the outside of the heat sinks 50a and 50b to dissipate heat.

Here, the upper cover 90 and the lower body 80 is further provided to fix the upper and lower ends of the first and second heat sinks 50a and 50b, respectively, and are vertical to fix the heat dissipation fins 60. The fixed shaft 96 is further provided.

The PTC device 30 has first and second terminals on both sides thereof and generates heat simultaneously with energization when currents of the positive electrode and the negative electrode are applied to both terminals, and are alternately arranged on both sides of the first electrode member 10. The first terminal is inserted / fixed between the fixing portions 24 of the frame 20 and the openings 26 so as to contact the surface portion of the first electrode member 10. The PTC element 30 is a static thermistor having a constant resistance temperature coefficient made by mixing 0.1% of tin and cerium in a barium titanate-based semiconductor. As a result, the resistance value fluctuates, and the heating value increases at low temperatures, and the heating value decreases again at high temperatures. The heating element has an automatic temperature control function and an automatic protection against overheating and overvoltage. In addition, there is a characteristic that does not cause oxidation reaction with oxygen in the air and does not generate oxidation gas which causes air pollution.

The first and second heat sinks 50a and 50b have a "H" shaped cross section and are in contact with the second terminal of the PTC element 30 to apply a second polarity and heat generated from the PTC element 30. It is coupled to the outside of the PTC element 30 and the insulator 40 to dissipate. In the first and second heat sinks 50a and 50b, a plurality of fastening holes 52a and 52b corresponding to the fastening holes 28 formed in the fixing part 24 of the frame 20 are formed in the longitudinal direction.

Meanwhile, lower ends of the heat sinks 50a and 50b are inserted into lower ends of the first and second heat sinks 50a and 50b such that the first and second heat sinks 50a and 50b have a second polarity. A second electrode member 70 having an insertion hole 72 and a ground terminal 74 for receiving a second polarity is provided.

The heat dissipation fin 60 has an insertion hole 62 to be installed at right angles to the combination of the first electrode member 10, the PTC element 30, the insulator 40, and the first and second heat sinks 50a and 50b. It is formed, the through-hole is formed on the side of the insertion hole, both ends of the interval maintaining step 164 bent to the opposite side is formed.

The lower body 80 is provided with an insertion hole 82 to which the lower ends of the first and second heat sinks 50a and 50b are fixed on the upper surface thereof, and a fixing hole corresponding to the through hole 66 of the heat dissipation fin 60. 84 is formed to penetrate vertically. In addition, the center of the insertion hole 82 is penetrated so that the lower end of the first electrode member 10 is inserted, and a through hole is formed at one side so that the ground terminal 74 of the second electrode member 70 is inserted.

The upper cover 90 has an insertion hole 92 on the bottom of which the upper ends of the first and second heat sinks 50a and 50b are fixed, and the fixing hole 94 coincides with the through hole 66 of the heat dissipation fin 60. ) Is formed to penetrate vertically. The vertical fixing shaft 96 is formed at the upper end of the fixing hole 94 to prevent the separation to be caught in the upper end of the fixing hole 94, the lower end of the through hole fixing hole 84 of the lower body 80 Thus, a screw portion 99 is formed to protrude downward.

Therefore, when a current is applied through the first electrode member 10 and the heat sinks 50a and 50b, heat is generated in the PTC element 30, and the heat is transmitted to the heat dissipation fin 60 to blow air into the vehicle interior. do.

However, the conventional automotive auxiliary heating apparatus having the above structure has a limit in increasing the size of the PTC element 30, so that a larger amount of heat can not be obtained, and each conductive carbon mixture 130 is a heat sink 50a. Since it is coupled to only a part of the 50b), there is a disadvantage that the temperature distribution is uneven for each heat sink 50a and 50b and the temperature transmitted to each of the heat dissipation fins 60 is different.

In addition, since the PTC element 30 applied to the conventional auxiliary heating device for automobiles must be bonded to the first electrode member 10 after sintering and solidifying the PTC raw material powder, the manufacturing process and the assembly process are complicated, and each part Due to the compact structure, the ventilation resistance is increased during blowing.

In addition, since the PTC device 30 has a characteristic that the initial inrush current increases as the temperature increases, the inrush current exceeds the capacity of the vehicle battery (100 to 120A) when the auxiliary auxiliary heating device for automobiles is used at a high temperature. There is a disadvantage that the car battery is discharged so as to increase.

The present invention has been made in order to solve the above problems, it is possible to change the size of the heating element according to the size of the required heating amount, the temperature distribution of each part is uniform, the assembly process and the internal configuration is simple to improve the ventilation resistance It is an object to provide a heating device configured to be minimized.

It is another object of the present invention to provide a heating apparatus configured to prevent excessive inrush current generation so that the battery is not discharged.

The heating device according to the present invention for achieving the above object is a material that generates heat when an electric current is applied to the conductive carbon mixture is formed long in the transverse direction, coupled to surround a part or the entire outer surface of the conductive carbon mixture Two or more planar heating elements including an insulating sheet and positioned to be spaced apart at regular intervals in the longitudinal direction; An electrode terminal coupled to the conductive carbon mixture to apply a current; It comprises a frame for fixing the position of the surface heating element and the electrode terminal.

In addition, the heating apparatus according to the present invention further includes one or more heat dissipation fins coupled to the insulating sheet for dissipating heat generated from the planar heating element to the outside. At this time, the heat radiation fins are formed in a plate shape in order to increase the heat radiation efficiency, it is preferable that both ends are coupled so as to contact each of the insulating sheet of the neighboring surface heating element.

The electrode terminal is configured to include a positive terminal coupled to one side of each conductive carbon mixture and a negative terminal coupled to the other side of each conductive carbon mixture.

In addition, the electrode terminal is coupled to one side of the first electrode terminal coupled to one or more conductive carbon mixtures, the other side of each conductive carbon mixture coupled to the first electrode terminal, and at the same time coupled to one side of another conductive carbon mixture An electrode terminal, a third electrode terminal coupled to the other side of the conductive carbon mixture, one side of which is coupled to the second electrode terminal, and one or more conductive carbon mixtures coupled to one side, and a conductive carbon of which one side is coupled to the third electrode terminal It may be modified to include a fourth electrode terminal coupled to the other side of the mixture.

Hereinafter, an embodiment of a heating apparatus having a planar heating element according to the present invention will be described with reference to the accompanying drawings.

Figure 2a is a perspective view of a heating device having a planar heating element according to the present invention, an embodiment when applied to the auxiliary heating device for heating the interior of the vehicle using the power of the car battery before the engine is heated.

As shown in FIG. 2A, the heating apparatus including the planar heating element according to the present invention includes a plurality of planar heating elements 100 that generate heat when a current is applied, and an electrode coupled to the planar heating elements 100 to apply current. It comprises a terminal 200, a frame 300 for fixing the position of the planar heating element 100 and the electrode terminal 200.

The planar heating element 100 includes a plate-shaped conductive carbon mixture 110 that is formed to extend in the lateral direction, and a pair of insulating sheets 120 coupled to the top and bottom surfaces of the conductive carbon mixture 110. It is composed. In addition, the planar heating element 100 is positioned to be spaced apart by a predetermined interval in the longitudinal direction, the heat generated from the planar heating element 100 is blown through the space between the planar heating element (100).

The electrode terminal 200 is coupled to one side of each planar heating element 100 to be in contact with one end of each conductive carbon mixture 110 and is connected to a positive terminal 210 connected to a '+' terminal of a car battery. It is configured to include a cathode terminal 220 coupled to the other side of each planar heating element 100 and connected to the '-' terminal of the car battery so as to be in contact with another one side of each conductive carbon mixture 110.

While the current input through the anode terminal 210 passes through the conductive carbon mixture 110, heat is generated in the conductive carbon mixture 110, and the heat is emitted through the insulating sheet 120 to heat the inside of the vehicle. To be blown. Since the time taken to generate heat by applying current to the conductive carbon mixture 110 is very short compared to the time taken to generate engine heat through the engine operation, the user can quickly heat the inside of the vehicle even before the engine is heated. You can do it.

In addition, the frame 300 is to maintain the coupling shape between the planar heating element 100 and the electrode terminal 200, the upper frame (2), both ends of which are respectively coupled to the upper end of the anode terminal 210 and the cathode terminal 220 ( 310 and a lower frame 320 having both ends coupled to lower ends of the positive electrode terminal 210 and the negative electrode terminal 220, respectively. At this time, the configuration of the frame 300 may be variously changed according to the size of the load applied from the outside and the shape of the heating device, and sufficient mechanical strength can be obtained only by coupling between the planar heating element 100 and the electrode terminal 200. If present, it can be omitted.

Figure 2b shows a coupling structure of the planar heating element applied to the present invention.

The planar heating element 100 applied to the present invention is coupled such that the carbon mixture 110 is positioned between the pair of insulating sheets 120 as shown in FIG. 2B.

The conductive carbon mixture 110 is configured to include an electrical resistive material in a mixture of carbon black charcoal powder, graphite powder, an organic insulator compound, and a ceramic bonding material, and generates heat as a current flows into the interior. By preventing the occurrence of short-circuit and heat conduction reduction caused by the adhesion of dust and other dirt can be prevented.

Since the conductive carbon mixture 110 having such characteristics is a material that is widely commercialized as a component of an electric product, a fuel tank for a vehicle, an antistatic packaging material, and the like, a detailed description thereof will be omitted.

In order to prevent the current flowing into the conductive carbon mixture 110 from being drawn out to the outside, the insulating sheet 120 is bonded to the upper and lower surfaces of the conductive carbon mixture 110, and the conductive carbon mixture 110 has its own shape. When manufactured to have a mechanical strength of more than the size that can maintain the conductive carbon mixture 110 is first manufactured, then a pair of insulating sheets 120 are attached.

In addition, when the conductive carbon mixture 110 is to be manufactured in a more free shape, the conductive carbon mixture 110 is melted in a liquid state to form a shape desired by the user, and then the insulating sheet 120 is bonded. Since the liquid conductive carbon mixture 110 does not have a mechanical strength of a size capable of maintaining its own shape, the conductive carbon mixture 110 is coated after the conductive carbon mixture 110 is applied to an upper surface of one insulating sheet 120. When the curing is completed, another insulating sheet 120 is covered and fixed. At this time, the method for applying the conductive carbon mixture 110, in order to apply the conductive carbon mixture 110 evenly on the upper surface of the insulating sheet 120, the liquid conductive carbon mixture 110 in a known roller (roller) It is preferable to use a roller coating method that is applied to the insulating sheet 120 after the injection.

3A illustrates a shape in which a plate-shaped heat sink fin is added to the heat generator shown in FIG. 2A, and FIG. 3B shows a coupling structure of the heat sink fins.

Heat generating device according to the present invention is coupled to the insulating sheet 120, as shown in Figure 3a so that the heat generated from the planar heating element 100 can be discharged to the outside quickly generated from the conductive carbon mixture 110 It is further provided with one or more heat dissipation fins 400 for receiving heat to be discharged to the outside.

The heat dissipation fin 400 is made of a material having a high heat transfer coefficient so that heat dissipation does not occur in shape due to heat generated from the planar heating element 100 and heat dissipation is performed quickly. In addition, the heat dissipation fin 400 is formed in a wide plate shape in order to increase the heat dissipation efficiency, it is preferable that both ends are coupled to contact the upper and lower insulating sheets 120 of the adjacent planar heating element, respectively.

In addition, when the heat dissipation fin 400 is coupled between the planar heating elements 100 to form a zigzag shape as shown in Figure 3b, heat is evenly transferred between the planar heating elements 100, so that the heat dissipation effect is not only improved, but also horizontal And structural strength against external force applied in the vertical direction.

In this embodiment, the heat dissipation fin 400 is formed in the shape of a flat plate, but the shape of the heat dissipation fin 400 applied to the present invention is not limited thereto, and may have a plate shape or a pin shape having a curved surface according to a user's selection. It can be applied to various changes such as.

Figure 4 is a perspective view showing a shape in which each conductive carbon mixture is combined in a parallel ℃ parallel structure, so that the shape and coupling structure of the frame will be omitted in order to easily understand the internal configuration.

As shown in FIG. 4, the electrode terminal 200 applied to the present invention is coupled to the first electrode terminal 230 and the first electrode terminal 230 coupled to one side of the upper three conductive carbon mixtures 110. The second electrode terminal 240 coupled to the other side of each conductive carbon mixture 110 to be coupled to one side of the fourth conductive carbon mixture 110 and the fourth coupled to the second electrode terminal 240. A third electrode terminal 250 coupled to the other side of the conductive carbon mixture 110 and coupled to one side of the three lower conductive carbon mixtures 110, and a conductive carbon mixture coupled to the third electrode terminal 250 at one side thereof ( It may be changed to include a fourth electrode terminal 260 coupled to the other side of the 110.

The current applied to the first electrode terminal 230 is applied to the second electrode terminal 240 through the upper three conductive carbon mixtures 110, and the current applied to the second electrode terminal 240 is the fourth conductive carbon. The current is applied to the third electrode terminal 250 through the mixture 110, and the current applied to the third electrode terminal 260 is applied to the fourth electrode terminal 260 through the lower three conductive carbon mixtures 110. .

That is, the upper three conductive carbon mixtures 110 are connected in parallel between the first electrode terminal 230 and the second electrode terminal 240, and the lower three conductive carbon mixtures 110 are connected to the third electrode terminal 250. Is connected in parallel between the fourth electrode terminal 260 and the fourth conductive carbon mixture 110 positioned between the upper three conductive carbon mixtures 110 and the lower three conductive carbon mixtures 110 is the second electrode terminal. It is connected in series between the 240 and the third electrode terminal 240.

In addition, when the heating apparatus according to the present invention is applied to a vehicle, the conductive carbon mixture 110 should be designed to generate heat of a suitable size for heating the vehicle interior. Therefore, the resistance value of the conductive carbon mixture 110 is preferably set so that the power capacity of the heating device has a range of 0.8 ~ 1.5kw when the car battery having a voltage of 12 ~ 13.5V is connected.

As described above, when the electrode terminals 200 are coupled to each conductive carbon mixture 110 to form a series parallel circuit configuration, as shown in FIG. 3A, each conductive carbon mixture 110 forms a parallel circuit configuration. The amount of heat is different. Therefore, in the heat generating apparatus according to the present invention, the circuit configuration of each conductive carbon mixture 110 may be variously changed according to the size of the heat generation desired by the user.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to a specific embodiment and should be interpreted by the attached claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

The heating device having the planar heating element according to the present invention has the advantage that the size and shape of the heating element can be freely changed and the circuit configuration of the heating element can be simply changed, thus making it easy to manufacture.

In addition, when using the planar heating element according to the present invention, excessive inrush current is not generated, and thus battery discharge is prevented, and the heat dissipation effect is improved due to the uniform temperature distribution of each portion of the heating element, and the internal configuration is simple. There is an advantage that the ventilation resistance is reduced.

Claims (6)

delete The conductive carbon mixture 110 is formed of a material that generates heat when a current is applied, and the insulating sheet 120 is coupled to cover a part or the entire outer surface of the conductive carbon mixture 110. And at least two planar heating elements 100 positioned to be spaced apart at regular intervals in the longitudinal direction; An electrode terminal 200 coupled to the conductive carbon mixture 110 to apply a current; One or more heat dissipation fins 400 for receiving heat generated from the conductive carbon mixture 110 and discharging them to the outside Including, The electrode terminal 200, A heating apparatus comprising a positive terminal 210 coupled to one side of each conductive carbon mixture 110 and a negative terminal 220 coupled to the other side of each conductive carbon mixture 110. . The method of claim 2, The electrode terminal 200, At least one first electrode terminal 230 coupled to one side of the conductive carbon mixture 110; A second electrode terminal 240 coupled to the other side of each conductive carbon mixture 110 coupled to the first electrode terminal 230 and coupled to one side of another conductive carbon mixture 110; A third electrode terminal 250 having one side coupled to the other side of the conductive carbon mixture 110 coupled to the second electrode terminal 240, and coupled to one or more conductive carbon mixture 110 one side; A fourth electrode terminal 260 having one side coupled to the other side of the conductive carbon mixture 110 coupled to the third electrode terminal 250; Heating device comprising a. The method of claim 2 or 3, The planar heating element 100, The conductive carbon mixture 110 is melted in a liquid state and applied to one surface of the insulating sheet 120, and when the curing of the conductive carbon mixture 110 is completed, another insulating sheet 120 is the conductive carbon mixture 110. Heating) characterized in that the cover is formed to be fixed. delete The method of claim 2 or 3, The heat dissipation fin 400, It is formed in a plate shape, the heating device, characterized in that both ends are coupled to each in contact with the insulating sheet (120) of the planar heating element (100) neighboring.

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