KR20060108844A - Pre-heater for cooling water in vehicle - Google Patents

Abstract

The present disclosure relates to a cooling water preheating device for a vehicle, wherein heat generated from a PTC device is smoothly transferred to a heat sink without staying in the PTC device, and a vehicle is designed to reduce a requirement of the PTC device by maximizing the heating efficiency of the PTC device. It relates to a cooling water preheating device.

The vehicle cooling water preheating device is a vehicle cooling water preheating device, in a vehicle cooling water preheating device, and forms an accommodating space 113 which is open at one side, and inlets 111 and outlets 112 are formed at both sides of the accommodating space, respectively. One case 110; and, a seating groove 131 is formed on the inner side of the front end and a heat sink 133 is formed on the outer side to be inserted into the accommodation space 113, and the rear end is fixed to the opening of the case 110. A heat dissipation unit 120 formed of a heat dissipation body 130 and a heat sink 141 formed on an outer side of the heat dissipation body 140 to be fixed to an inner surface of the heat dissipation body 130; And, the PTC element 152 seated in the seating groove 131, the terminal 154, the one end is in contact with the PTC element 152 and the rear end is connected to an external power source, the terminal 154 and the heat sink It is achieved by including a heat generating portion 130 made of a thermally conductive insulator 156 interposed between the 140.

Preheater, PTC Element, Thermal Insulator, Thermal Conductive Compound

Description

Pre-Heater for cooling water in vehicle}

Figure 1a is a perspective view of a conventional vehicle cooling water preheating device,

Figure 1b is a cross-sectional view of a conventional vehicle cooling water preheating device,

2 is a perspective view of a vehicle cooling water preheating apparatus according to the present invention;

3 is an exploded perspective view of a vehicle cooling water preheating apparatus according to the present invention;

Figure 4 is a cross-sectional view of the coupling of the present invention cooling water for the vehicle coolant,

5 is a state diagram used in the vehicle cooling water preheating device of the present invention.

※ Explanation of code for main part of drawing

110: case, 111: inlet, 112: outlet, 113: accommodation space, 114: flange,

115: insertion groove, 116: fastening hole, 120: heat radiating portion, 130: heat radiating body, 131: seating groove,

132: insert groove, 133: heat sink, 134: fastener, 135: flange, 136: insert hole,

137: through hole, 140: heat sink, 141: heat sink, 142: through hole, 150: heat generating unit, 152: PTC element,

154: terminal, 154a: terminal connection portion, 156: thermal conductive insulator, 156a: thermal conductive compound,

160: case, 161: hook, 162: inclined protrusion

The present invention relates to a vehicle cooling water preheating device that allows heat generated from a PTC device to be smoothly transferred to a heat sink without staying in the PTC device and to reduce the required amount of the PTC device by maximizing the heat generating efficiency of the PTC device.

In general, heating of a vehicle is performed using heat by an engine or a heat exchanger. However, since the actual heating is not achieved until the heat of the engine is raised above a certain temperature, the cooling water preheating device is often installed as an auxiliary heating device for the initial heating of the vehicle. This auxiliary heating device can be useful for the early heating of the winter weather or severe winter crossing, and also provides heat for defrosting the windshield of the vehicle, which occurs during the winter. In recent years, as the total available energy available for heating a vehicle decreases with the development of technology such as fuel economy improvement of the vehicle, the importance of the auxiliary heating apparatus is increasing.

Conventionally, nickel-chromium wire is used as a heating element of a vehicle cooling water preheater. However, the wire may be disconnected, resulting in poor durability, and overcurrent when heat is generated when no cooling water is supplied during initial start-up of the vehicle. There were many problems due to the risk of fire due to occurrence and overheating.

In order to remedy this drawback, a cooling water preheating device which attempts to prevent the risk of fire has emerged by adopting a PTC element, a static thermistor whose resistance value increases with temperature rise, as a heating element.

1 is an exploded perspective view of a vehicle cooling water preheating apparatus employing a conventional PTC element as a heating element. The conventional preheating device is interposed between a plurality of PTC elements 30 and a plurality of heat conducting members 40 connected to a power source between a pair of heat sinks 20 facing each other, and the heat sinks 20 are coupled to each other. After fixing the PTC element 30 and the conduction member 40, the heat sink assembly was inserted into the bottom of the case 10, and the bent portion 21 of the heat sink was coupled to the bottom of the case to seal the case. .

However, since the PTC element is disposed only on one side of the conducting member, heat transfer to the heat sink on the opposite side is not performed smoothly, so that the efficiency of heat exchange is reduced.

On the other hand, in order to overcome these disadvantages, when the PTC element is disposed on both sides of the energizing member, the heat transfer is performed well by a pair of heat sinks disposed on the outer surface of the PTC element, but the inner surface of the PTC element, that is, the conductive member and Heat dissipation does not occur at the contact surface of, causing heat accumulation.

Therefore, as the temperature rises, the resistance increases rapidly and the current decreases to decrease the temperature, and when the temperature decreases again, the resistance decreases and the current increases to increase the temperature. If heat dissipation is not performed smoothly, it does not generate heat, and thus the function of the device cannot be effectively exerted.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cooling water preheating device for a vehicle in which heat generated from a PTC element is smoothly transferred to a heat sink without remaining in the PTC element.

In addition, an object of the present invention is to provide a cooling water preheating device for a vehicle that can reduce the required amount of the PTC element by improving the heat exchange rate to maximize the heat generating efficiency of the PTC element.

The vehicle cooling water preheating apparatus of the present invention for achieving the above object, in the vehicle cooling water preheating apparatus, a case formed in one side of the receiving space opened and formed inlet and outlet respectively on both sides of the receiving space; A heat sink is formed on the outer surface, and a heat sink is formed in the outer surface, and the rear end is inserted into the receiving space, and the rear end is a heat sink fixed to the inner surface of the heat dissipating body. A heat dissipation unit; And a PTC element seated in the seating groove, a terminal having one side contacted to the PTC element and having a rear end connected to an external power source, and a heat generating part including a heat conductive insulator interposed between the terminal and the heat sink. By providing a preheating device.

The thermally conductive insulator of the vehicle cooling water preheating device of the present invention is preferably to apply a thermal compound on the outer surface.

Preferably, the terminal of the vehicle cooling water preheating apparatus of the present invention forms a terminal connection portion for external power connection at an outer end thereof.

The present invention preferably includes a pair of covers that are coupled to each other to surround the rear end of the heat dissipation unit and the terminal connection unit of the vehicle cooling water preheater.

The cover of the vehicle cooling water preheating device of the present invention preferably forms an inclined protrusion and a hook which are fastened to each other at a coupling end.

Preferably, the heat dissipation part of the vehicle cooling water preheating device of the present invention inserts a sealing member into an assembly surface on which the heat dissipation body and the heat dissipation plate are fixed.

Preferably, the case of the vehicle cooling water preheating device of the present invention inserts a sealing member into an assembly surface on which the heat dissipation unit is fixed.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention vehicle cooling water preheater will be described in detail.

2 is a perspective view of the vehicle cooling water preheating apparatus of the present invention, Figure 3 is an exploded perspective view of the vehicle cooling water preheating apparatus of the present invention.

The vehicle cooling water preheating device of the present invention shown in the drawings is largely a case 110, a heat dissipation unit 120 for heating the cooling water passing through the case 110 inside the case 110, and the heat dissipation unit The heat generating unit 130 is inserted into the heat generating portion 120, and the case 110 and the cover 140 surrounding the lower portion of the heat generating portion 130.

Here, the case 110 forms an accommodating space 113 having one side opened therein, and forms an inlet 111 and an outlet 112 on both sides of the accommodating space, respectively, and inserts an insertion groove into an outer side of the opening. The flange 114 with the fastening hole 116 and the 115 is formed.

The heat dissipation unit 120 forms a seating groove 131, an insertion groove 132, and a fastening hole 134 on an inner side thereof, a heat sink 133 on an outer side thereof, and a seating recess 131. Heat dissipation body 130 consisting of the insertion hole 136 and the flange 135 formed with the through-hole 137 to match the fastening hole 116 of the case 110, and the heat sink 141 on the outer surface ) And a heat dissipation plate 140 formed with a plurality of through holes 142 corresponding to the fastening holes 134 of the heat dissipation body.

The heat generating unit 150 is seated in the seating groove 131, the PTC element 152 for generating heat according to the power of the power supply, and the front end is inserted into the insertion hole 136 of the heat dissipation body 130, the PTC element 152 Is connected to an external power source, and the rear end is connected to an external power source to supply power to the PTC element 152, and the terminal 154 is in contact with the opposite side of the PTC element 152 with the PTC therebetween. The heat conductive insulator 156 absorbs heat generated from the element 152 and transfers the heat to the heat sink 140.

Here, a thermal compound 156a is applied to the top surface of the thermal insulator 156 to improve thermal conductivity, and a terminal connection part 154a is formed at the rear end of the terminal 154 to connect an external power source.

The cover 160 is provided in plurality to be assembled from both sides to surround the flange 114 of the case 110 and the flange 135 of the heat dissipating body 130 and the terminal connecting portion 154a of the heat generating portion 150, Hooks 161 and inclined protrusions 162 are formed on the assembly surfaces corresponding to each other.

On the other hand, in the present embodiment has been described that the three heat generating unit 150 is provided side by side in the heat dissipating unit 120, but is not limited to this example, it may be installed more or less depending on the capacity and use of the device. It could be.

EMBODIMENT OF THE INVENTION Hereinafter, the assembly structure and operation | movement of the vehicle cooling water preheating apparatus of this invention which have the said structure are demonstrated.

Figure 4 is a cross-sectional view of the combined cooling water preheating device for a vehicle of the present invention, Figure 5 is a state diagram of the use of the cooling water preheating device for a vehicle of the present invention.

First, as shown in FIG. 4, the PTC element 152 is seated by the seating groove 131 of the heat dissipation body 130 so that one side of the PTC element 152 is in close contact with the inner surface of the heat dissipation body 130. The front end of the terminal 154 is inserted into the insertion hole 136 of the heat dissipating body 130 so that the bottom of the front end of the terminal 154 is in contact with the other side of the PTC element 152, and then the terminal 154 The thermally conductive insulator 156 is disposed in close contact with the upper surface of the thermal conductive insulator, and a thermally conductive compound 156a is applied to the upper surface of the thermally conductive insulator 156 to improve the thermal conductivity.

As such, the sealing member R is inserted into the insertion groove 132 formed on the inner surface of the heat dissipating body 130 on which the heat generating unit 150 is seated, and then the heat dissipating plate 140 is assembled. The through hole 142 of the heat dissipating plate 140 is provided. By fastening the bolt (B) to the fastening hole 134 of the heat dissipation body 130 through the assembly.

Then, in the state in which the sealing member S is inserted into the insertion groove 115 formed on the flange 114 assembly surface of the case 110, the heat sinks formed on the outside of the heat dissipation body 130 and the heat dissipation plate 140, respectively. 133 and 141 are inserted into the receiving body 113 of the case 110 to exchange heat with the cooling water circulating inside the case 110, and then the fastening hole of the case 110 through the through hole 137 of the heat dissipating body 130. Fasten the bolts (B) with (116) and assemble them tightly.

On the other hand, the terminal end portion 154a is fixed to the rear end of the terminal 154 whose tip is in contact with the PTC element 152 through the insertion hole 136 of the heat dissipation body 130 to facilitate connection of an external power source.

In addition, through a pair of covers 160 coupled to surround the flange 114 of the case 110 and the flange 135 of the heat dissipation unit 120 and the terminal connecting portion 154a fixed to the rear end of the terminal 154. In order to protect the assembly portion, the pair of covers 160 is assembled while the hook 161 formed on one cover 160 assembly surface is fixed to the inclined protrusion 162 of the opposite cover 160.

In the vehicle cooling water preheating apparatus of the present invention having such an assembly structure as shown in FIG. 5, the heat dissipation part 120 having the PTC element 152 built therein is placed / assembled in the accommodation space 113 of the case 110. The coolant W introduced into the inlet 111 of the 110 moves in the receiving space 113 and comes into contact with the heat sinks 133 and 141 of the heat dissipation unit 120. While being heat-exchanged with the heat sinks 133 and 141 heated by heat, they are discharged and circulated through the outlet 112 while being heated to a predetermined temperature.

Looking at the action of the present invention coolant preheating device,

When the external power is connected to the rear terminal connecting portion 154a of the terminal 154 and the power is applied, the PTC element 152 generates heat while passing through the PTC element 152 and energizing the grounded radiating body 130.

This heat is dissipated to both sides of the PTC element 152, one side of the heat sink 133 formed on the outer side of the heat dissipation body 130 via the heat dissipation body 130 in direct contact with / contact with the PTC element 152. To the heat sink 141 of the heat sink 140 through the terminal 154 contacting the other side of the PTC element 152 and the heat conductive insulator 156 contacting the opposite side of the terminal 154 to the other side. Delivered.

At this time, the thermal conductive compound 156a is applied to the outer surface of the thermal insulator 156 to fill the voids formed in the contact surface with the heat sink 140 to improve the thermal conductivity, so that the heat generated and transferred from the PTC element 152 is transferred to the heat sink. It is to be smoothly transferred to the heat sink 141.

Therefore, the PTC element 152 having the constant temperature coefficient of heat is not smoothly carried out, so that the heat stays inside, thereby eliminating the disadvantage that the internal resistance increases and the passage amount of current decreases effectively, thereby preventing heat generation. Through such improvement, it is possible to maximize the efficiency of the PTC device 152 to reduce the required amount of the PTC device 152.

In the vehicle cooling water preheating device of the present invention as described above, the heat conductive insulator is disposed on the opposite side of the PTC element so that the heat generated from the PTC element can be smoothly transferred to the heat sinks on both sides without remaining inside, thereby improving durability and heat generation efficiency of the PTC element. Has the effect of maximizing.

In addition, by applying a thermal conductive compound on the outer surface of the thermally conductive insulator, the contact surface between the thermally conductive insulator and the heat dissipation layer is filled with voids and in close contact with each other, thereby improving heat exchange rate.

Claims (7)

In the vehicle cooling water preheating device, A case 110 in which one side of the receiving space 113 is opened and inlets 111 and outlets 112 are formed on both sides of the receiving space, respectively; A heat dissipating body 130 having a seating groove 131 formed at the inner side of the front end and a heat sink 133 formed at the outer side thereof, being inserted into the accommodation space 113 and having a rear end fixed to the opening of the case 110; A heat dissipation unit 120 formed of a heat sink 141 formed on an outer side of the heat dissipation body 130 by forming a heat sink 141 on the outside; And, The PTC device 152 seated in the seating groove 131, the terminal 154 is connected to the PTC device 152, one side is connected to an external power source, the terminal 154 and the heat sink 140 Cooling water preheating device for a vehicle comprising a heat generating portion 130 made of a thermally conductive insulator (156) interposed between. The method of claim 1, The thermal insulator 156 is a vehicle cooling water preheating device, characterized in that to apply a thermal compound (Thermal compound, 156a) on the outer surface. The method of claim 1, The terminal 154 is a vehicle coolant preheater, characterized in that for forming a terminal connection portion (154a) for connecting external power at the outer end. The method according to claim 1 or 3, Cooling water preheating device for a vehicle, characterized in that it comprises a pair of covers 160 are coupled to each other to surround the rear end and the terminal connection portion (154a) of the heat dissipation portion (120). The method of claim 4, wherein The cover 160 is a vehicle cooling water preheating device, characterized in that to form an inclined protrusion 162 and a hook (161) which are respectively fastened to the coupling end. The method of claim 1, The heat dissipation unit 120 is a vehicle cooling water preheating device, characterized in that the sealing member (S) is inserted into the assembly surface on which the heat dissipation body 130 and the heat dissipation plate 140 is fixed. The method of claim 1, The case 110 is a vehicle cooling water preheating device, characterized in that the sealing member (S) is inserted into the assembly surface on which the heat dissipation unit 120 is fixed.

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