KR102613331B1 - Heater for heating coolant with waterproof structure - Google Patents

Abstract

The present invention relates to a heat exchanger for a hybrid vehicle or an electric vehicle, and more specifically, to a heater for heating coolant. A heater for heating coolant with a waterproof structure according to an aspect of the present invention includes a case portion provided with an upper case member and a lower case member to form an internal space, a lower space where a heating coil is disposed in the internal space, and an external A plate portion dividing into an upper space where an internal wire electrically connected so that the current supplied through the wire flows to the heating coil is disposed, and the coolant accommodated in the lower space leaks to the outside or flows into the upper space. and a sealing portion disposed along the circumference of the plate portion to prevent damage, and the plate portion is provided with a grounding protrusion for grounding, and the grounding protrusion may be disposed to penetrate the sealing portion.

Description

Heater for heating coolant with waterproof structure}

The present invention relates to a heat exchanger for a hybrid vehicle or an electric vehicle, and more specifically, to a heater for heating coolant.

Efforts to solve environmental pollution problems are continuing around the world. In accordance with this global trend, the automobile industry is accelerating the development of eco-friendly vehicles such as hybrid vehicles or electric vehicles.

A typical car, that is, a car that runs an engine using oil, uses the engine's coolant to heat the inside of the car, but since an electric car does not have an engine, a separate coolant heater is provided to heat the coolant. This coolant heater is an electric heater that generates heat using a battery as a power source.

These electric heaters are equipped with a grounding terminal to discharge overcurrent to prevent safety accidents of the electric heater and vehicle due to overcurrent, and are also equipped with a waterproof structure to prevent coolant from leaking through the grounding structure.

Conventional coolant heaters were assembled into the upper case and lower case with rubber seals for waterproofing placed on the upper and lower surfaces of the plate equipped with the ground terminal, respectively. However, in this configuration, rubber seals are installed on the upper and lower surfaces of the plate. As the area for support was required, the size of the plate was excessively increased, which not only increased the overall weight of the coolant heater, but also caused a problem of deterioration in assembly as the rubber seals were placed on the upper and lower surfaces of the plate, respectively.

Therefore, there is a need for improvement in this regard.

The present invention is intended to solve the above problems, and the purpose of the present invention is to provide a heater for heating coolant equipped with a waterproof structure that can prevent coolant leakage even if the size of the plate portion is reduced.

In addition, another object of the present invention is to provide a heater for heating coolant having a waterproof structure that can be easily assembled into the plate portion and the sealing portion to the case portion.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention, a case portion provided with an upper case member and a lower case member to form an internal space, a lower space in which a heating coil is disposed in the internal space, and a current supplied through an external wire is supplied to the heating coil. A plate portion dividing the upper space into an upper space where an internal wire electrically connected to flow to the coil is disposed, and surrounding the plate portion to prevent coolant contained in the lower space from leaking to the outside or flowing into the upper space. A heater for heating coolant is provided, including a sealing portion disposed so as to be disposed, wherein the plate portion is provided with a grounding protrusion for grounding, and the grounding protrusion is disposed to penetrate the sealing portion and has a waterproof structure.

At this time, the sealing portion includes an upper sealing member disposed on the upper surface of the plate portion, a lower sealing member disposed on a lower surface of the plate portion, and a lower sealing member disposed on a side surface of the plate portion to integrally connect the upper sealing member and the lower sealing member. It includes a side sealing member, and the side sealing member may be provided with a through hole through which the ground protrusion passes.

At this time, the upper sealing member may be provided with an upward supporting protrusion extending upward, and the lower sealing member may be provided with a downward supporting protrusion extending downward.

At this time, an upper seating groove into which the upper sealing member is seated may be provided around the upper case member, and a lower seating groove into which the lower sealing member may be seated may be provided around the lower case member.

At this time, the upper case member may be provided with an upper protrusion seating groove into which the upper part of the grounding protrusion is seated, and the lower case member may be provided with a lower protrusion seating groove into which the lower part of the grounding protrusion is seated.

At this time, a fastening protrusion extending downward toward the lower case member may be provided on the outside of the upper seating groove, and a fastening groove into which the fastening protrusion is inserted may be provided on the outside of the lower seating groove.

At this time, the sealing part may be provided with an extended sealing member extending along the extension direction of the ground protrusion.

At this time, the upper case member may be provided with an upper pressing surface that presses the upper surface of the extended sealing member, and the lower case member may be provided with a lower pressing surface that presses the lower surface of the extended sealing member.

At this time, the upper pressure surface and the lower pressure surface are respectively disposed on a portion of the circumference of the upper case member and the lower case member that overlaps the extension sealing member along the height direction, and the upper case member and the lower case The fastening protrusion and the fastening groove may be respectively disposed on the remaining portion of the circumference of the member.

According to the above configuration, the heater for heating the coolant equipped with a waterproof structure according to an embodiment of the present invention is grounded to the plate portion only in a part of the section required for grounding with the sealing portion arranged to surround the side as well as the upper and lower surfaces of the plate portion. By forming protrusions, leakage of coolant can be prevented even if the size of the plate part is reduced, and this reduces the overall weight of the heater for heating coolant, making it possible to make it lighter.

In addition, in the heater for heating coolant equipped with a waterproof structure according to an embodiment of the present invention, the upper sealing member and the lower sealing member are integrally connected through the side sealing member, so the sealing portion can be stably placed on the plate portion, and in this state, By assembling it into the case part, assembly efficiency can be improved.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is a perspective view showing a heater for heating coolant according to an embodiment of the present invention.
Figures 2 and 3 are exploded perspective views of a heater for heating coolant according to an embodiment of the present invention. Figure 2 is a perspective view showing a state viewed from the top, and Figure 3 is a perspective view showing a state viewed from the bottom. .
Figure 4 is a cross-sectional view of portion I-I of Figure 1.
Figure 5 is an enlarged view of part C of Figure 4.
Figure 6 is a perspective view showing a sealing unit according to an embodiment of the present invention.
Figure 7 is a cross-sectional view of portion II-II of Figure 1.
FIG. 8 is an enlarged view of portion D of FIG. 7.
Figure 9 is a perspective view showing a sealing unit according to another embodiment of the present invention.
FIG. 10 is an enlarged view of portion E of FIG. 9.
FIG. 11 is an enlarged view of portion A of FIG. 2.
FIG. 12 is an enlarged view of part B of FIG. 3.
Figure 13 is a cross-sectional view showing a state in which a sealing part according to another embodiment of the present invention is assembled to a heater for heating coolant.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description have been omitted in the drawings, and identical or similar components are given the same reference numerals throughout the specification.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

FIG. 1 is a perspective view showing a heater for heating coolant according to an embodiment of the present invention, and FIGS. 2 and 3 are exploded perspective views showing a heater for heating coolant according to an embodiment of the present invention. FIG. 2 is an upper portion of the heater. It is a drawing showing the state viewed from above, and Figure 3 is a perspective view showing the state viewed from the bottom.

As shown in FIGS. 1 to 3, according to an embodiment of the present invention, a case portion 100 is provided with an upper case member 110 and a lower case member 120 to form an internal space 10; The inner space 10 has a lower space 11 where the heating coil 40 is disposed, and an internal wire 60 that is electrically connected so that the current supplied through the external wire 50 flows to the heating coil 40. The circumference of the plate part 200 is formed to prevent the coolant contained in the plate part 200 and the lower space 11, which is arranged into the upper space 12, from leaking to the outside or flowing into the upper space 12. It includes a sealing part 300 arranged to surround the plate part 200, and the plate part 200 is provided with a grounding protrusion 210 for grounding, and the grounding protrusion 210 has a waterproof structure arranged to penetrate the sealing part 300. A heater for heating the coolant is provided.

The upper case member 110 is open on the lower side, and the lower case member 120 is open on the upper side, so that when the upper case member 110 and the lower case member 120 are assembled together, an internal space 10 is created inside. is formed

A plurality of ribs that are spaced apart from each other in the height direction may be formed on the outer surface of the case portion 100. The plurality of ribs support the case portion so that it is not deformed by temperature or external shock.

The case portion 100 may be made of a synthetic resin material such as plastic. However, it is not limited to these synthetic resin materials and may be made of a flame-retardant metal material.

Additionally, the lower case member 120 may be provided with an inlet port 20 and an outlet port 30 for the inflow and outflow of coolant. However, the interior of the lower case member 120 may be configured to allow not only coolant but also various heat media that can absorb and release heat to flow in and out. These inlet ports 20 and outlet ports 30 may be combined with external hoses (not shown) or pipes (not shown) through which coolant flows.

The plate portion 200 is disposed in contact with the lower circumference of the upper case member 110 and the upper circumference of the lower case member 120, respectively. With this plate portion 200 seated on the upper circumference of the lower case member 120, the lower case member 120 can be covered with the upper case member 110 and then assembled using a bolt fastening method.

This plate portion 200 may be made of a metal material, but is not necessarily limited thereto, and may be made of various materials with flame retardancy.

The sealing part 300 may be made of a synthetic resin material such as rubber, but is not necessarily limited thereto, and may be made of various materials that prevent leakage of coolant, such as silicone. At this time, the sealing part 300 may be formed separately from the plate part 200 and then be configured so that the worker assembles the sealing part 300 to the plate part 200 through separate manual work, but the sealing part 300 is not necessarily limited to this. In the process of injecting the sealing part 300, it is also possible to use an insert injection method in which the plate part 200 is placed inside an injection mold and then the sealing part 300 is injected.

A separate power supply unit (not shown) may be provided to supply current from the outside. For example, this power supply unit may be a battery for an electric vehicle. However, this power supply unit is not limited to batteries for electric vehicles, and may be a variety of batteries provided in vehicles, such as batteries for eco-friendly vehicles such as hybrid vehicles or hydrogen vehicles that drive engines using fossil fuels.

The current supplied through the power supply unit flows through the external wire 50, and the external wire 50 includes a first connection part 51 that is electrically connected to the internal wire 60, and a second connection part that is electrically connected to the power supply unit. (52) may be provided.

A ground wire 70 may be electrically connected to the ground protrusion 210 provided on the plate portion 200. The first ground connection portion 71 of the ground wire 70 is electrically connected to the plate portion 200 through a fastening member such as a bolt, and the second ground connection portion 72 is electrically connected to the ground. For example, the ground may be the body or frame of a vehicle.

The above-described heating coil 40 is arranged to be wound a plurality of times inside the lower space 11. As an example, the heating coil 40 is provided with a plurality of turns (40a, 40b, 40c). For convenience of explanation, only three plurality of turns (40a, 40b, 40c) are shown in the drawing, but the number of plurality of turns (40a, 40b, 40c) may be four or more.

The exterior of this heating coil 40 may be made of a metal material. For example, this metal material may be steel, stainless steel, copper, or incoloy.

The heating coil 40 generates heat due to electrical resistance when current is supplied through the power supply unit. The heat generated by the heating coil 40 heats the cooling water accommodated in the lower space 11.

That is, while the sealing part 300 is arranged to surround the circumference of the plate part 200, the ground protrusion 210 is arranged to penetrate the sealing part 300, so even if the size of the plate part 200 is reduced, coolant leakage occurs. can be effectively prevented.

Figure 4 is a cross-sectional view of part I-I of Figure 1, Figure 5 is an enlarged view of part C of Figure 4, and Figure 6 is a perspective view showing a sealing part according to an embodiment of the present invention.

As shown in FIGS. 4 to 6, the sealing part 300 includes an upper sealing member 310 disposed on the upper surface of the plate portion 200 and a lower sealing member 320 disposed on the lower surface of the plate portion 200. ) and a side sealing member 330 disposed on the side of the plate portion 200 and integrally connecting the upper sealing member 310 and the lower sealing member 320, and the side sealing member 330 has a ground protrusion. A through hole 331 through which (210) passes may be provided.

That is, with the sealing part 300 arranged to surround not only the upper and lower surfaces of the plate part 200 but also the side surfaces, the grounding protrusion 210 is formed on the plate part 200 only in some sections required for grounding, thereby forming the plate part ( Even if the size of 200) is reduced, coolant leakage can be prevented, and as a result, the overall weight of the heater for heating the coolant is reduced, making it possible to make it lighter.

In addition, since the upper sealing member 310 and the lower sealing member 320 are integrally connected through the side sealing member 330, the sealing portion 300 can be stably placed on the plate portion 200, and in this state, By assembling it into the case portion 100, assembly efficiency can be improved.

At this time, the upper sealing member 310 may be provided with an upward supporting protrusion 311 extending upward, and the lower sealing member 320 may be provided with a downward supporting protrusion 321 extending downward.

When the upward support protrusion 311 and the downward support protrusion 321 are provided in this way, the sealing performance between the upper case member 110 and the upper sealing member 310, and the lower case member 120 and the lower sealing member 320 is improved. It improves.

At this time, an upper seating groove 111 in which the upper sealing member 310 is seated is provided around the upper case member 110, and a lower seating groove 111 in which the lower sealing member 320 is seated is provided around the lower case member 120. A groove 121 may be provided.

When the upper seating groove 111 and the lower seating groove 121 are formed in this way, the positions of the upper sealing member 310 and the lower sealing member 320 are stably fixed, improving structural stability, and allowing the operator to determine the assembly position. As it can be easily checked, assembly is improved.

Figure 7 is a cross-sectional view of part II-II of Figure 1, and Figure 8 is an enlarged view of part D of Figure 7.

As shown in FIGS. 7 and 8, the upper case member 110 is provided with an upper protrusion seating groove 111a in which the upper part of the grounding protrusion 210 is seated, and the lower case member 120 is provided with a grounding protrusion 210. ) may be provided with a lower protrusion seating groove (121a) in which the lower part of the unit is seated.

By seating the ground protrusion 210 between the upper protrusion seating groove 111a and the lower protrusion seating groove 121a, the plate portion 200 is stably fixed, improving structural stability, and making it easier for workers to determine the assembly position. Since it can be checked, assembly is improved.

As shown in Figures 4 and 5, a fastening protrusion 112 is provided on the outside of the upper seating groove 111 and extends downward toward the lower case member 120, and a fastening protrusion 112 is provided on the outside of the lower seating groove 121. A fastening groove 122 into which the protrusion 112 is inserted may be provided.

That is, when assembling the upper case member 110 on the upper part of the lower case member 120, the fastening protrusion 112 can be inserted into the fastening groove 122 to ensure that the upper case member 110 is assembled in the correct position.

In addition, since these fastening protrusions 112 and fastening grooves 122 are provided on the outside of the upper seating groove 111 and the lower seating groove 121, interference with the sealing portion 300 does not occur, and assembly efficiency is improved. , structural stability is improved.

Figure 9 is a perspective view showing a sealing unit according to another embodiment of the present invention, and Figure 10 is an enlarged view of portion E of Figure 9.

As shown in FIGS. 9 and 10 , the sealing portion 300 may be provided with an extended sealing member 340 extending along the extension direction of the ground protrusion 210 .

Through this, it is possible to effectively block coolant leaking through the ground protrusion 210.

FIG. 11 is an enlarged view of part A of FIG. 2, FIG. 12 is an enlarged view of part B of FIG. 3, and FIG. 13 shows a sealing part according to another embodiment of the present invention assembled in a heater for heating coolant. This is a cross-sectional view showing the state.

11 to 13, the upper case member 110 is provided with an upper pressing surface 113 that presses the upper surface of the extended sealing member 340, and the lower case member 120 is provided with an extended sealing member ( A lower pressing surface 123 that presses the lower surface of 340 may be provided.

That is, during the assembly process of the upper case member 110 and the lower case member 120, the extended sealing member 340 is configured to be pressed by the upper pressure surface 113 and the lower pressure surface 123, thereby forming the ground protrusion 210. Through this, leaking coolant can be blocked more effectively.

At this time, an upper pressure surface 113 and a lower pressure surface 123 are disposed on a portion of the circumference of the upper case member 110 and the lower case member 120 that overlaps the extension sealing member 340 along the height direction. A fastening protrusion 112 and a fastening groove 122 may be disposed on the remaining portions of the upper case member 110 and the lower case member 120, respectively.

That is, the upper pressure surface 113 and the lower pressure surface 123 are disposed only in the portion that overlaps the extension sealing member 340 and the height direction, and the fastening protrusion 112 and the fastening groove 122 are in the remaining portion. By arranging this, the extended sealing member 340 is effectively pressed through the upper pressure surface 113 and the lower pressure surface 123, and stable assembly is possible through the fastening protrusion 112 and the fastening groove 122. .

As seen above, in the heater for heating the coolant equipped with a waterproof structure according to the present invention, the sealing part 300 is arranged to surround not only the upper and lower surfaces of the plate part 200 but also the sides, and is used only in some sections required for grounding. By forming the ground protrusion 210 on the plate portion 200, leakage of coolant can be prevented even if the size of the plate portion 200 is reduced. This reduces the overall weight of the heater for heating the coolant, making it possible to make it lighter. The upper sealing member 310 and the lower sealing member 320 are integrally connected through the side sealing member 330, so that the sealing part 300 is stably placed on the plate part 200 and is attached to the case part 100. By assembling, assembly can be improved.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented in the present specification, and those skilled in the art who understand the spirit of the present invention will understand the spirit of the present invention within the scope of the same spirit. Other embodiments can be easily proposed by addition, change, deletion, addition, etc., but this will also be said to fall within the scope of the present invention.

10: internal space 11: lower space
12: upper space 20: inlet port
30: Outflow port 40: Heating coil
40a, 40b, 40c: Turn 50: External wire
51: first connection part 52: second connection part
60: Inner wire 70: Ground wire
71: first ground connection 72: second ground connection
100: Case portion 110: Upper case member
111: upper seating groove 111a: upper protrusion seating groove
112: fastening protrusion 113: upper pressure surface
120: Lower case member 121: Lower seating groove
121a: Lower protrusion seating groove 122: Fastening groove
123: lower pressure surface 200: plate portion
210: Ground protrusion 300: Sealing part
310: upper sealing member 311: upward support protrusion
320: lower sealing member 321: downward support protrusion
330: side sealing member 331: through hole
340: Extension sealing member

Claims (9)

A case portion provided with an upper case member and a lower case member to form an internal space;
a plate portion dividing the interior space into a lower space where a heating coil is disposed and an upper space where an internal wire electrically connected to allow a current supplied through an external wire to flow to the heating coil is disposed; and
a sealing portion arranged to surround the periphery of the plate portion to prevent coolant accommodated in the lower space from leaking to the outside or flowing into the upper space;
Includes,
The plate portion is provided with a grounding protrusion for grounding, and the grounding protrusion is disposed to penetrate the sealing portion,
The sealing unit includes an upper sealing member disposed on the upper surface of the plate portion, a lower sealing member disposed on a lower surface of the plate portion, and a side sealing portion disposed on a side of the plate portion and integrally connecting the upper sealing member and the lower sealing member. Includes absence,
A heater for heating coolant having a waterproof structure in which the side sealing member is provided with a through hole through which the ground protrusion passes. delete According to paragraph 1,
The upper sealing member is provided with an upwardly extending support protrusion,
A heater for heating coolant provided with a waterproof structure in which the lower sealing member is provided with a downwardly extending supporting protrusion. According to paragraph 3,
An upper seating groove in which the upper sealing member is seated is provided around the upper case member,
A heater for heating coolant provided with a waterproof structure having a lower seating groove around the lower case member into which the lower sealing member is seated. According to paragraph 3,
The upper case member is provided with an upper protrusion seating groove into which the upper part of the grounding protrusion is seated,
A heater for heating coolant provided with a waterproof structure in which the lower case member is provided with a lower protrusion seating groove in which the lower part of the ground protrusion is seated. According to paragraph 4,
A fastening protrusion extending downward toward the lower case member is provided on the outside of the upper seating groove,
A heater for heating coolant provided with a waterproof structure in which a fastening groove into which the fastening protrusion is inserted is disposed outside the lower seating groove. According to clause 6,
A heater for heating coolant provided with a waterproof structure in which the sealing portion is provided with an extended sealing member extending along an extension direction of the ground protrusion. In clause 7,
The upper case member is provided with an upper pressing surface that presses the upper surface of the extended sealing member,
A heater for heating coolant provided with a waterproof structure in which the lower case member is provided with a lower pressing surface that presses the lower surface of the extended sealing member. According to clause 8,
The upper pressure surface and the lower pressure surface are respectively disposed on a portion of the perimeter of the upper case member and the lower case member that overlaps the extension sealing member along the height direction,
A heater for heating coolant provided with a waterproof structure in which the fastening protrusion and the fastening groove are respectively disposed on remaining portions of the upper case member and the lower case member.

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