KR20180003260A - PTC unit for Motor-vehicle, PTC heater comprising thereof and air conditioning system comprising thereof - Google Patents

Abstract

Provided is a positive temperature coefficient (PTC) unit for a heater of a vehicle. According to one embodiment of the present invention, the PTC unit comprises: a heating unit including a PTC element; and a heat radiating unit including a heat radiating film installed on a heat radiating member and at least part of the outer surface of the heat radiating member to enhance heat radiating performance and installed on at least one surface of the heating unit. Accordingly, enhanced heat radiating performance is realized without a structural modification to increase a specific surface area of the heat radiating unit while decreasing air passing performance in order to enhance the heat radiating performance and, at the same time, durability in the heat radiating performance is excellent. In addition, the air passing performance of the heat radiating unit is enhanced such that an increase of noises and power consumption caused by overuse of peripheral devices such as a fan or the like is able to be prevented. Moreover, overheat of a PTC module and overload of a PTC module control circuit due to a decrease of the air passing performance of the heat radiating unit are prevented such that an expensive high performance control circuit is not needed, thereby being able to implement the PTC heater for a vehicle at reduced manufacturing costs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PTC unit for a vehicle heater, a PTC heater having the PTC unit, and a PTC unit for a motor vehicle,

The present invention relates to a PTC module, and more particularly to a PTC module, which has superior durability and exhibits improved heat dissipation performance, thereby preventing an overload of a peripheral device such as a fan, thereby preventing performance and durability degradation of a peripheral device, To a PTC module for a vehicle heater capable of minimizing the power consumption of the vehicle, a PTC heater having the PTC module, and a vehicle air conditioner.

Hybrid vehicles and electric vehicles do not have sufficient engine cooling water required for heating because engine use is limited or the engine is not used.

In order to prevent such a problem, a method of heating a vehicle interior using a separate preheating heater for a predetermined period of time during which the engine is heated is used. In a conventional heater using a hot-wire coil, heating is high, And the service life of the heating wire is short, so that repair and replacement of parts frequently occur.

Accordingly, a heater using a PTC (Positive Temperature Coefficient) element is used as an auxiliary heating device for heating in the early stage of startup, which allows heating using electric energy of the battery.

The PTC heater is advantageous in that it can be used semi-permanently because the fire risk is low and its life is long. Such PTC heaters are mainly used in relatively small capacity heaters. Recently, high capacity PTC heaters have been required for various types of vehicles including electric vehicles and users' needs.

The PTC heater is implemented as a heater unit including PTC devices and a circuit unit for controlling ON / OFF of the PTC device, and further includes a fan for blowing the heat radiated from the PTC heater to the room of the vehicle. do.

In order to dissipate the heat generated by the PTC device to a maximum extent, the heater unit includes a heat dissipating member having a collimated heat dissipation fin or a plurality of discontinuous heat dissipation fins, thereby achieving higher heat dissipation performance There is an attempt to do.

However, when the increase of the specific surface area is maximized, the distance between the heat sink fins becomes too narrow, so that it is very difficult for the wind blown by the fan to pass through the PTC heater, thereby causing differential pressure and noise. To solve this problem, it is necessary to rotate the fan at a faster speed so as to blow air to the PTC heater at a higher pressure / intensity. Further, the fan rapidly rotates, which causes noise problems and power consumption of the vehicle. Further, when the heat radiated from the PTC device can not be smoothly transferred to the inside of the vehicle through the air blown from the fan, a lot of heat energy stagnates near the PTC heater, and the stagnated heat energy is close to the PTC devices There is a problem that frequent occurrence of defects and / or high-performance control circuits with high heat resistance are required.

Accordingly, since the heat generated by the PTC device is dissipated at a very high efficiency even if the distance between the heat sink fins is not narrowed, the high speed use of the fan or the use of the high-capacity fan is not necessary, thereby reducing the power consumption of the vehicle as a whole, It is an urgent need to develop a heat dissipating member for a PTC heater that can maintain the performance and durability of a circuit portion to be controlled and peripheral electronic components.

KR10-2014-0144942

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a heat dissipating device capable of exhibiting an improved heat dissipation performance without structural change to increase the specific surface area of the heat dissipating part, It is an object of the present invention to provide a PTC unit for a vehicle having excellent durability.

In addition, since the maximum specific surface area of the heat dissipation unit is not required to be increased, deterioration of the air passage due to the heat dissipation unit is prevented, so that overload of the peripheral device such as the fan is prevented. Thus, performance / durability, Another object of the present invention is to provide a PTC unit for a vehicle in which an increase in consumption can be prevented.

In addition, the present invention prevents a PTC module from being overheated and overloading of the PTC module control circuit due to a decrease in the air permeability of the heat dissipating unit, thereby eliminating the need for a high-performance, high-performance control circuit. There is another purpose to provide.

In addition, the present invention provides a vehicle air conditioner capable of smoothly blowing air heated inside a vehicle while maintaining a proper level of airflow, thereby reducing the overall power consumption of the vehicle and stably circulating air. .

According to an aspect of the present invention, there is provided a semiconductor device comprising: a heat generating unit including a PTC (Positive Temperature Coefficient) element; And a heat dissipation part provided on at least one surface of the heat dissipation substrate and including a heat dissipation coating provided on at least a part of the outer surface of the heat dissipation substrate to improve heat dissipation performance.

According to an embodiment of the present invention, the heat generating unit may include a PTC device and an electrode terminal that supports the PTC device and applies power.

The radiating member may include a radiating plate disposed adjacent to the heat generating unit and a radiating fin fixed on the radiating plate. At this time, the radiating fins may be brazed and fixed to the heat sink.

Also, the radiating fin may be provided on the heat sink by bending the heat radiating plate several times, or may be provided on the heat sink with a plurality of surface heat radiators spaced apart from each other by a predetermined distance.

The heat dissipation coating may be provided on a part or all of the outer surface of at least one of the heat dissipation fin and the heat dissipation plate.

The present invention also relates to a PTC module according to the present invention; And a circuit module electrically connected to the PTC module.

The present invention also relates to a fan for blowing air to the PTC heater; And a PTC heater according to the present invention for heating the air blown from the fan.

According to the present invention, the PTC unit of the present invention can exhibit improved heat dissipation performance without increasing the specific surface area of the heat dissipating unit while reducing the air permeability for improving the heat dissipation performance, and at the same time, An excellent heat radiation performance can be exhibited for a long period of time.

In addition, as the air passing property of the heat dissipating unit is improved, it is possible to prevent increase in noise and power consumption due to use of a peripheral device such as a fan. Furthermore, since the PTC module is overheated due to a decrease in the air passage property of the heat dissipating part, and the PTC module control circuit is prevented from being overloaded, a high-performance control circuit is not required, so that the PTC heater for a vehicle can be realized at a reduced production cost.

In addition, it is possible to blow air heated inside the vehicle smoothly while maintaining an appropriate level of airflow, thereby reducing the overall power consumption of the vehicle and realizing a vehicle air conditioner capable of stably circulating air.

1 is a perspective view of a PTC module according to an embodiment of the present invention,
FIG. 2 is a perspective view of the PTC unit, FIG. 2B is an exploded perspective view of the PTC unit, and FIG. 2C is a sectional view taken along the line A-A 'in the PTC unit of FIG. Fig. 4 is a cross-
FIG. 3 is a perspective view of a heat dissipating unit included in the PTC unit according to an embodiment of the present invention. FIG. 3B is a cross-sectional view of the heat dissipating unit along the B- And
4 is a perspective view of a PTC heater according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

1, a PTC module 1000 according to an exemplary embodiment of the present invention includes a heat generating unit 120 having a PTC device (not shown) and a heat dissipating unit 110, A negative electrode terminal 200 interposed between the PTC units and a pair of side support members 410 and 420 for fixing them on both sides of the PTC units 100 and 101 and 102 arranged side by side and including the PTC units 100 and 101 and 102, A coupling member 500 for fixing the PTC units 100, 101 and 102, the negative electrode terminal 200 and the side support members 410 and 420 at a central portion thereof and end caps 310 and 320 for fixing both ends thereof .

As shown in FIG. 2A, the PTC unit 100 may include a heat generating unit 120 and heat dissipating units 110 and 110 'provided on both sides of the heat generating unit. 2A, the heat dissipating units 110 and 110 'may be implemented as a PTC unit only on one side of the heat generating unit 120. However, in order to maximally dissipate the heat radiated from the heat generating unit 120, As shown in FIG. The PTC unit 100 may include a coupling member 130 for coupling the heat generating unit 120 and the heat dissipating unit 110 together.

2B, the heat generating unit 120 may include a plurality of PTC devices 122 and electrode terminals 121 capable of supporting the devices while applying power to the PTC devices 122 .

The PTC device 122 is a resistor exhibiting an abrupt increase in resistance value at a specific temperature or higher. Any known device exhibiting such properties can be used without limitation. For example, the PTC device 122 may be a barium titanate-based semiconductor.

A plurality of the PTC devices 122 may be provided in the electrode terminals 121 in the longitudinal direction of the electrode terminals 121. At this time, the PTC device 122 is attached to the surface of the electrode terminal 121 through a separate adhesive member, or the electrode terminal 121 is punched to be physically seated and bonded to the PTC device 122 And the PTC element 122 may be coupled to the coupling portion in a fitting manner.

The electrode terminal 121 may be an anode electrode terminal or a cathode electrode terminal, depending on the electrical configuration of the PTC module 1000.

1, since the electrode terminal 200 opposite to the polarity of the electrode provided in the PTC unit 100 may be interposed between the PTC unit 100, the PTC unit 100 An insulating member 150 may be provided on one surface of the heat generating portion so as to prevent an electrical short circuit due to the opposite electrode terminal 200 disposed adjacent to the heat dissipating portion 110.

The heat dissipation unit 110 is provided to dissipate the heat generated by the PTC device of the heat generating unit 120 into the air and includes the heat dissipation substrates 111 and 112.

The heat dissipating base 111 and 112 may include a heat dissipating plate 112 disposed adjacent to the heat generating unit 120 and a heat dissipating fin 111 fixed on the heat dissipating plate 112 as shown in FIGS. .

The heat dissipation plate 112 is a planar plate for increasing a contact area with the heat generating unit 120. The heat dissipation plate 112 may be a known heat dissipation material and may be made of a metal or a nonmetal or thermally conductive filler such as graphene, The thermoplastic resin may be a thermally conductive plastic having a filler.

The radiating fins 111 may have a structure maximizing the area of contact with air in order to rapidly radiate the heat conducted to the heat dissipating plate 112 to the air as much as possible. For example, as shown in FIG. 2A, the heat dissipation fin 111 may be fixed to the heat dissipation plate 112 at one side in the longitudinal direction of the heat dissipation body bent by bending the planar heat dissipation member a plurality of times. Alternatively, a plurality of planar heat sinks may be spaced apart at a predetermined distance, and may be fixed on the heat sink 112 by vertically erecting the planar heat sinks to increase the contact area with air. However, the specific structure and shape of the radiating fin 111 are not limited to the above, and may be adopted without limitation in the structure and shape of the radiating fin provided in the automotive heater.

However, as described above, the air blown from the fan of the air conditioner for a vehicle is blown to the other side through the empty space of the radiating fin at one side of the radiating unit. In order to increase the contact area between the air and the radiating fin, When a heat radiating fin having a narrow space between the bent portions is provided or a heat radiating portion is provided by providing a large number of the plural number of surface heat radiating elements at a very narrow interval, it is very difficult for the air to pass through the heat radiating portion due to the narrowed air passage. There is a problem that noise due to the pressure difference occurs. Accordingly, even if the heat radiation efficiency of the PTC module is excellent, the radiated heat can not be smoothly transmitted to the interior of the vehicle, thereby failing to serve as an air conditioner. In addition, since the heat radiated from the PTC module 1000 can not be transferred to the inside of the vehicle, it affects other parts around the PTC module 1000, for example, a control circuit, thereby reducing performance or increasing power consumption due to overload . On the other hand, in order to pass the air through the narrowed air passage, it is required to blow air from one side of the PTC module to the other side with a very large pressure. For this purpose, the fan disposed at one side of the PTC module must rotate at a higher speed. However, the increase in the number of revolutions of the fan increases the noise of the vehicle according to the fan noise, and increases the power consumption of the fan.

Accordingly, the heat dissipating unit 110 according to the present invention includes the heat dissipating coating 180 provided on at least a part of the outer surface of the heat dissipating substrate 111, 112 as shown in FIG. 2C. As the heat dissipation coating 180 increases the heat dissipation performance of the heat dissipation substrates 111 and 112, an excessive structural change of the heat dissipation fin for increasing the contact area with air can be minimized, thereby preventing the air passage from being narrowed It is possible to avoid an excessive use of the fan and an expensive control circuit portion due to heat generation, thereby reducing the overall power consumption of the vehicle and lowering the unit cost.

As shown in FIG. 3A, the heat dissipation coating 180 may cover the outer surface of the heat dissipation fin 111, which is a portion of the heat dissipation substrate, which is in direct contact with air.

The heat dissipation coating 180 improves the heat dissipation performance and has an advantage that it can be employed as a heat dissipation unit even if the specific surface area of the heat dissipation fin is not maximized. More specifically, as shown in FIGS. 3A and 3B, the number of bending times of the heat dissipating fins 113 in the heat dissipating base members 113 and 114 is smaller than that of the heat dissipating fins 111 shown in FIGS. 2A and 2C, wide. 2A has a specific surface area smaller than that of the heat radiating fin 111 of FIG. 2A, the heat radiating fin 113 has the same shape as that of FIG. 2A due to the heat radiating coatings 181 and 181 'covering the outer surface of the heat radiating fin 113 It is possible to exhibit heat dissipation performance that is similar to or higher than that in the case where the heat dissipating fin without the heat dissipation coating is adopted as the heat dissipating portion. The heat dissipation coatings 181 and 181 'may include heat dissipation coatings 181 and 181' on both the outer surface of the heat dissipation plate 114 and the outer surface of the heat dissipation fin 113 as shown in FIG. The portion where the coating is formed may be changed according to the purpose and may be formed on part or all of the outer surface of any one of the heat radiating plate 114 and the radiating fin 113. [

The heat-radiating coatings 180, 181, and 181 'may be an oxide coating formed by anodizing the heat-radiating substrate by a known method, for example. The heat dissipation plate 114 and the heat dissipation fin 113 of the heat dissipation base material may be coupled through a fastening member or a fastening member such as a bolt or a nut. However, in such a fastening system, it is difficult to completely eliminate the clearance between the heat dissipation plate and the heat dissipation fin. There is a problem that noise due to shaking of the heat dissipating substrate may significantly occur when the wind blown from the fan of the heat dissipating unit passes through the heat dissipating substrate. Accordingly, the heat dissipation fin 113 can be integrally fixed on the heat dissipation plate 114 through the brazing joint, thereby significantly reducing noise generation. However, when the brazing joint is brazed to the heat dissipating fin and / or the heat dissipating plate provided with the heat dissipating coating, the heat dissipating coating has to be exposed for a long time at a high temperature. As a result, There are other problems that deteriorate. In particular, when the heat radiation coating is a heat radiation coating layer including an adhesive material and a heat radiation filler, a high treatment temperature of 450 ° C or higher may cause carbonization of the adhesive material and / or the heat radiation filler.

In addition, as shown in FIGS. 2A and 3A, the radiating fin 113 of the radiating substrate may have a complicated shape that is cologated for increasing the specific surface area, and a heat radiating coating layer is formed on the outer surface of the complicated radiating fin 113 It is not easy to form a uniform thickness even if a heat radiation coating layer is formed, and it may be difficult to exhibit uniform heat radiation performance.

Accordingly, the heat radiation coatings 180, 181, 181 'may be an oxide coating. When the oxide film is provided as a heat dissipation film, deterioration of the heat dissipation film due to the brazing bonding performed at the above-mentioned high temperature temperature condition is prevented, and the heat dissipation fin having a complicated or miniaturized shape and the heat dissipation film can be uniformly formed on the heat dissipation plate .

The oxide film may be formed through a known method, for example, an anodizing process.

4, a PTC module 1000 having a plurality of PTC units according to the present invention and a circuit module 2000 electrically connected to the PTC module are implemented as shown in FIG.

The circuit module 2000 is a control circuit for controlling a current applied to the PTC device. The circuit module 2000 may include a power input unit 2100 through which a current flows into the PTC heater, and a PTC control terminal 2200 that controls the PTC heater. The circuit module 2000 can be selected and used without limitation in a known control circuit provided in a PTC heater for a vehicle and a module having the control circuit, so that the present invention is not particularly limited thereto, and a detailed description thereof will be omitted.

In addition, the present invention can be embodied as a vehicle air conditioner including an air blowing device for blowing air toward the PTC heater and a PTC heater for heating the air blown from the air blowing device.

The fan unit may include a fan and a driving unit for driving the fan. The fan unit may employ a known configuration provided in the vehicle, and the present invention is not particularly limited thereto.

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, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: PTC unit 110, 110 ', 110 ": heat dissipation substrate
111, 111 ', 113: heat dissipating fins 112, 112', 114: heat sink 121: positive electrode terminal 130:
150: Insulating members 180, 181, 181 ': Heat-
200: cathode electrode terminal 310, 320: end cap
410, 420: side support member 500: fastening member

Claims (9)

A heating unit including a PTC (Positive Temperature Coefficient) element; And
And a heat dissipation part provided on at least a part of an outer surface of the heat dissipation substrate to improve heat dissipation performance, the heat dissipation part being provided on at least one surface of the heat dissipation part. The method according to claim 1,
Wherein the heat generating portion includes a PTC device and an electrode terminal for supporting the PTC device and applying power thereto. The method according to claim 1,
Wherein the heat radiating member includes a heat radiating plate disposed adjacent to the heat generating portion and a radiating fin fixed on the heat radiating plate. The method of claim 3,
Wherein the heat dissipation fin includes a plurality of planar heat dissipators bent on the heat dissipation plate a plurality of times, or a plurality of planar heat dissipators vertically installed on the heat dissipation plate, the heat dissipation fins being spaced apart from each other by a predetermined distance. The method of claim 3,
Wherein the heat radiation film is provided on at least a part or all of the outer surface of at least one of the heat radiation fin and the heat radiation plate. The method according to claim 1,
Wherein the heat radiation film is an oxide film. The method of claim 3,
And the radiating fins are brazed and fixed to the heat radiating plate. A PTC module comprising: a plurality of PTC units according to any one of claims 1 to 7; And
And a circuit module electrically connected to the PTC module. A blowing device for blowing air to a PTC heater; And
And a PTC heater according to claim 8 for heating the air blown from the air blowing device.

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