KR100492374B1 - PTC rod assembly and Pre-heater including the same - Google Patents

Abstract

The present invention relates to a PTC rod assembly of a vehicle preheater having a PTC element, the lower PTI rod having one side extending in an open channel shape, and the insulator of the insulating material so as not to contact the lower PTC rod. It is surrounded by a positive pole (+) terminal located inside the lower PTC rod, and a structure that generates heat when the power is applied, the PTC element coupled to contact with one side of the positive electrode terminal, and made of a high thermal conductivity material It includes a heat transfer block coupled to contact the other side of the positive electrode terminal, and the upper PTC rod coupled to cover the opening of the lower PTC rod, the structure of the insulator for fixing the positive terminal is more simplified and the manufacture of the insulator PTC rod assembly, which simplifies and increases the efficiency of heat transfer generated from PTC element Provides a vehicle preheater.

Description

PTC rod assembly and pre-heater including the same}

The present invention relates to a PTC rod assembly and a vehicle preheater including the same, and more particularly, to a PTC rod assembly including a PTS rod assembly configured to allow a simpler and more stable structure of an insulator for fixing a positive electrode terminal. It relates to a vehicle preheater.

A general vehicle is provided with a heating device that uses the heat energy of the cooling water warmed by the heat generated by the engine, for indoor heating, dehumidification or defrosting of the windshield of the vehicle.

Such a heating apparatus has a long time until the cooling water is heated and the room is heated since the cooling water flowing around the engine flows into the heater after the engine is started. Accordingly, there is a problem that after starting, it should be in a cold state for a certain time.

In order to solve such a problem, a heat rod assembly and a preheater that are preheated using a positive temperature coefficient (PTC) device have been disclosed in Korean Patent Publication No. 10-0445722.

Hereinafter, this structure will be briefly described with reference to the accompanying drawings.

1 is an exploded perspective view of a conventional preheater.

As shown in FIG. 1, a conventional vehicle preheater includes a PTC rod assembly 10 including a PTC element and a heat fin assembly 20 arranged side by side on both sides of the PTC rod assembly 10. And both side ends of the positive electrode terminal 30 arranged side by side with the heat fin assembly 20, the PTC rod assembly 10, the combination of the heat pin assembly 20 and the negative electrode terminal 30, respectively. Both ends of the combined frame (40, 50), the PTC rod assembly 10, the heat fin assembly 20, the negative terminal 30 and the combination of the frame (40, 50) It comprises a housing (60, 70) coupled to each other in.

In addition, in order to protect the pin assembly 20, the inner surface of the frame (40, 50) is preferably provided with a pin protector (80).

2 is an exploded perspective view of a conventional PTC rod assembly, and FIG. 3 is a cross-sectional view of a conventional PTC rod assembly.

As shown in Figures 2 and 3, the lower PTC rod 11 is configured in the channel form to serve as a kind of receiving portion.

An insulator 12 is disposed on the bottom of the lower PTC rod 11 to prevent a short circuit, and the insulator 12 is made of a material having a good non-conductor property such as nylon and good thermal conductivity.

In addition, an anode terminal 17 made of carbon steel or the like is fixedly coupled to the insulator 12 in a length direction, and a bottom groove 16 is formed in the bottom of the insulator 12 to accommodate a relatively thin anode terminal 17. The positive terminal 17 is securely fixed. In addition, the PTC element 18 generated by the power supply is seated in the step groove 15 formed at the side of the bottom groove 16 and fixed by the fitting protrusion 14 formed at the side end of the step groove 15. do.

However, in order to form the step grooves 15 and the fitting protrusions 14 for fixing the PTC element 18 as described above, there are problems in manufacturing as well as the manufacturing cost is increased.

In addition, a plurality of openings 13 are formed in the bottom of the insulator 12 so that the heat generated from the PTC element 18 is transferred to the lower PTC rod 11, and the air present in the openings 13 has a thermal conductivity. This very low property has the disadvantage that the heat transfer efficiency that the heat generated from the PTC element 18 is transferred to the lower PTC rod 11 is very low.

The present invention has been made to solve the above problems, the structure of the insulator for fixing the positive electrode terminal is simplified, the manufacture of the insulator is simplified, the PTC rod assembly is configured to increase the heat transfer efficiency of the PTC device and It is an object to provide a vehicle preheater including the same.

The PTC rod assembly according to the present invention for solving the above problems, in the PTC rod assembly of a vehicle preheater having a PTC element, the lower PTC rod is formed in an open channel shape on one side, A positive electrode terminal located inside the lower PTC rod, and is made of an insulating material is coupled to surround the positive electrode terminal, the first exposure groove is formed to expose a portion of one side of the positive electrode terminal and the second exposed groove so that a portion of the other side of the positive electrode terminal is exposed The formed insulator, the PTC element coupled to the first exposed groove to be in contact with the positive electrode terminal, the heat transfer block coupled to the second exposed groove to be in contact with the positive terminal, and the lower PTC And an upper PTC rod coupled to cover the opening of the rod.

The positive electrode terminal and the insulator are integrally manufactured through a double injection process, and the insulator is preferably spaced apart from the bottom surface of the lower PTC rod and the bottom of the upper PTC rod.

The insulator has protruding jaws formed on both ends of the inner surface of the lower PTC rod and the upper PTC rod, ie, the inner wall of the lower PTC rod, and the bottom surface of the lower PTC rod, and the bottom of the upper PTC rod. And the second exposed grooves are formed in a square shape and edge grooves are formed in each corner.

Heat transfer block is preferably made of alumina thinner than the PTC element.

In addition, the vehicle preheater according to the present invention includes a PTC rod assembly configured as described above.

Hereinafter, an embodiment of a PTC rod assembly and a vehicle preheater including the same according to the present invention will be described with reference to the accompanying drawings.

4 is an exploded perspective view of the PTC rod assembly according to the present invention.

As shown in FIG. 4, the PTC rod assembly according to the present invention is a PTC rod assembly of a vehicle preheater having a PTC element 400, wherein a bottom PTC rod is formed to have a long channel shape. A positive electrode (+) terminal 200 wrapped in an insulator 300 of an insulating material so as not to contact the rod 100 and the lower PTC rod 100 and positioned inside the lower PTC rod 100; PTC element 400 coupled between the positive electrode terminal 200 and the upper PTC rod 600, and the heat transfer block 500 is made of a material having a high thermal conductivity coupled to contact the other side of the positive electrode terminal 200 And an upper PTC rod 600 coupled to cover the open surface of the lower PTC rod 100.

PTC element 400 is coupled to the one side is in contact with the positive terminal 200 and the other side is in contact with the upper PTC rod 600 that serves as the negative terminal (-), is configured to generate heat when power is applied . In this case, since the upper PTC rod 600 and the lower PTC rod 100 are coupled to be in contact with each other, not only the upper PTC rod 600 but also the lower PTC rod 100 also serve as a negative electrode terminal.

In addition, when the upper PTC rod 600 and the lower PTC rod 100 are coupled to both ends of the insulator 300, that is, the inner surfaces of the upper PTC rod 600 and the lower PTC rod 100 are formed. A protruding jaw 330 is formed in close contact with the inner wall surface and the bottom surface of the lower PTC rod 100 and the bottom of the upper PTC rod 600 (see FIG. 8). Accordingly, since the inner spaces of the upper PTC rod 600 and the lower PTC rod 100 are sealed by the protruding jaw 330, a fire may be caused by contact of dust or other foreign matter to the PTC element 400. The case does not occur.

FIG. 5 is a cross-sectional view illustrating a shape in which a positive electrode terminal and an insulator are coupled, and FIG. 6 is a cross-sectional view of the positive electrode terminal and the insulator cut along the line A-A shown in FIG.

As shown in FIGS. 5 and 6, the insulator 300 is coupled to surround the positive electrode terminal 200, and the first exposure groove 310 and the first exposure groove 310 are exposed to expose a portion of one side and the other side of the positive electrode terminal 200, respectively. The second exposed groove 320 is formed. At this time, the positive electrode terminal 200 and the insulator 300 may be separately manufactured and combined, or may be integrally manufactured through a double injection process. When the positive electrode terminal 200 and the insulator 300 are integrally manufactured through the double injection process, the number of manufacturing processes is reduced and the number of assembly processes is also reduced, thereby reducing the manufacturing cost of the PTC rod assembly.

In addition, the insulator 300 is manufactured through injection. When the first exposed groove 310 is formed in a simple square shape, each corner of the first exposed groove 310 is not formed at right angles due to the characteristics of the injection process. Occurs frequently. If the corners of the first exposed grooves 310 are not formed at right angles as described above, the PTC element 400 may not be in close contact with the anode terminal 200, and thus the heat generation function is reduced.

Therefore, in order to solve the above problems, the first exposed groove 310 is applied to the present invention is formed in a square shape and the edge groove 312 is formed in each corner. When the edge groove 312 is formed as described above, even if a slight dimensional error occurs in the corner of the first exposed groove 310, the PTC element 400 may be in close contact with the anode terminal 200.

In addition, the second exposed groove 310 may also have edge grooves formed in each corner, like the first exposed groove 310, to improve adhesion between the heat transfer block 500 and the positive electrode terminal 200.

FIG. 7 is a perspective view of the PTC rod assembly according to the present invention, FIG. 8 is a cross-sectional view of the PTC rod assembly cut along the BB line shown in FIG. 7, and FIG. 9 is cut along the CC line shown in FIG. 7. Is a cross-sectional view of the PTC rod assembly.

As shown in FIG. 8, both ends of the insulator 300, that is, the protruding jaw 330, are inner surfaces of the upper PTC rod 600 and the lower PTC rod 100, that is, the upper PTC rod 600. It is in close contact with the bottom surface and the inner wall surface and bottom surface of the lower PTC rod 100. In addition, the stop portion of the insulator 300 is coupled so as to be drawn between the both side wall of the lower PTC rod 100, as shown in Figure 9, the coupling of the lower PTC rod 100 and the upper PTC rod 600 It is preferable to be spaced apart from the bottom surface of the lower PTC rod 100 and the bottom surface of the upper PTC rod 600 so as not to interfere with.

In this case, the PTC device 400 is coupled to the first exposed groove 310 by a fitting method, and the heat transfer block 500 is coupled to the second exposed groove 320 by a fitting method. And the heat block 500 may be maintained in contact with the positive electrode terminal 200 without a separate fixing means.

The lower PTC rod 100, the anode terminal 200, the upper PTC rod 600, and the heat transfer block 500 are made of a material having high thermal conductivity so as to transfer heat generated from the PTC terminal to the outside. In particular, since the heat transfer block 500 has a purpose for heat transfer, it is preferable that the heat block 500 is made of a material having high thermal conductivity such as alumina.

Since the PTC terminal is in direct contact with the upper PTC rod 600 and indirectly contacts the lower PTC rod 100 by the positive electrode terminal 200 and the heat transfer block 500, the PTC terminal is applied as power is applied. The heat generated in the conduction to the upper PTC rod 600 and the lower PTC rod 100. Accordingly, the PTC rod assembly according to the present invention has a significantly improved thermal conductivity as compared with the conventional heat rod assembly in which the positive electrode terminal 200 and the lower PTC rod 100 are spaced apart at regular intervals. In this case, the heat transfer block 500 is preferably manufactured to have a thickness thinner than the PTC element 400 so that heat generated from the PTC element 400 can be effectively transferred to the lower PTC rod 100.

In the present exemplary embodiment, the PTC element 400 is in contact with the upper surface of the anode terminal 200, and the PTC element 400 is in contact with the lower surface of the anode terminal 200, but the PTC element 400 is contacted. ) And the coupling position of the positive electrode terminal 200 may be changed.

In addition, the vehicle preheater including the PTC rod assembly having the structure as described above is quickly discharged to the outside heat generated from the PTC terminal, thereby significantly improving the performance of heating the inside of the vehicle.

Compared with the conventional preheater, the vehicle preheater including the PTC rod assembly according to the present invention differs only in the configuration of the PTC rod assembly and has the same structure as the heat fin assembly or the housing. Omit.

As mentioned above, although this invention was demonstrated in detail using the preferable Example, the scope of the present invention is not limited to a specific Example 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 PTC rod assembly according to the present invention has the advantage that the structure of the insulator for fixing the positive electrode terminal is simplified and the insulator manufacturing is simplified, thereby reducing the manufacturing cost and increasing the heat transfer efficiency generated from the PTC device.

In addition, the vehicle preheater according to the present invention has an advantage that the performance of heating the inside of the vehicle is greatly improved.

1 is an exploded perspective view of a conventional preheater.

2 is an exploded perspective view of a conventional heat rod assembly.

3 is a cross-sectional view of a conventional heat rod assembly.

4 is an exploded perspective view of the PTC rod assembly according to the present invention.

5 is a side view illustrating a shape in which a positive electrode terminal and an insulator are coupled to each other.

6 is a cross-sectional view of the anode terminal and the insulator cut along the line A-A shown in FIG.

7 is a perspective view of the PTC rod assembly according to the present invention.

FIG. 8 is a cross-sectional view of the PTC rod assembly cut along the line B-B shown in FIG. 7.

9 is a cross-sectional view of the PTC rod assembly cut along line C-C shown in FIG. 7.

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

100: lower PTC rod 200: positive terminal

300: Insulator 400: PTC element

500: heat block 600: upper PTC rod

Claims (8)

In the PTC rod assembly of a vehicle preheater having a PTC element, A lower PTC rod formed on one side of an open channel shape, An anode terminal positioned inside the lower PTC rod, An insulator made of an insulating material and coupled to surround the positive electrode terminal, the first exposure groove being formed to expose a portion of one side of the positive electrode terminal, and the second exposure groove formed to expose a portion of the other side of the positive electrode terminal; A PTC device coupled to the first exposed groove of the insulator so as to be in contact with the anode terminal; A heat transfer block coupled to the second exposed groove of the insulator so as to be in contact with the positive electrode terminal; Upper PTC rod that engages to cover the open side of the lower PTC rod PTC rod assembly, characterized in that comprises a. The method according to claim 1, The positive electrode terminal and the insulator are PTC rod assembly, characterized in that which is manufactured integrally through a double injection process. The method according to claim 1 or 2, The insulator is, PTI rod assembly, characterized in that spaced apart from the bottom surface of the lower PTC rod and the bottom surface of the upper PTC rod. The method according to claim 1 or 2, The insulator is, And a protruding jaw that is in close contact with the inner side surfaces of the lower PTC rod and the upper PTC rod is formed at both ends. The method according to claim 1 or 2, The first exposure groove and the second exposure groove, PTC rod assembly is formed in a square shape characterized in that the edge groove is formed in each corner. The method according to claim 1 or 2, The heat block, The PTC rod assembly, characterized in that the thickness is thinner than the PTC device. The method according to claim 1 or 2, And the heat transfer block comprises alumina. Vehicle preheater comprising a PTC rod assembly according to claim 1 or 2.