KR102180255B1 - Cooling water course type egr cooler - Google Patents

Abstract

Disclosed is an invention for a coolant flow path type RG cooler. The disclosed coolant flow path type easyR cooler includes: a housing consisting of a first body and a second body facing each other, a coupling portion that couples the first body and the second body, and a cooling device and a housing provided inside the housing. It characterized in that it comprises a ladder plate to limit the flow of the cooling device.

Description

Coolant flow path type EasyR cooler {COOLING WATER COURSE TYPE EGR COOLER}

The present invention relates to a cooling water flow channel type EasyR cooler, and more particularly, a cooling water channel type EasyR with improved rigidity so that the outflow of cooling water can be prevented by improving the coupling structure of the housing. It's about the cooler.

EGR (EXHAUST-GAS RECIRCULATION: exhaust gas reduction) is a device that reduces NOx generated during combustion by recirculating exhaust gas discharged from the combustion chamber through the exhaust pipe in the vehicle and recirculating it to the intake pipe. It is a device to increase the EGR rate by reducing the temperature of the exhaust gas.

The RG cooler forms a housing into which a cooling device is inserted by combining housing parts such as an upper body and a lower body, and an adapter and a stopper are provided to allow heat transfer of exhaust gas to the cooling device.

Meanwhile, in Korean Patent Application Publication No. 2008-0003513 (published date: 2008.01.08.), "EGR cooler" is disclosed.

An object of the present invention is to provide a cooling water flow path type easyR cooler with improved rigidity so that the outflow of cooling water can be prevented by improving the coupling structure of the housing and the shape of the housing can be continuously maintained.

The coolant flow path type easyR cooler according to the present invention includes: a housing consisting of a first body and a second body facing each other, a coupling portion coupling the first body and the second body, and provided inside the housing. It characterized in that it comprises a cooling device and a ladder plate coupled to the housing to limit the flow of the cooling device.

In addition, the coupling portion is formed on the edge of the first body and characterized in that it comprises a coupling end contacting the inner surface of the second body.

In addition, the coupling end is formed to be shorter than the edge length of the first body to secure the coupling space of the ladder plate, and the first body and the second body characterized in that the leakage preventing portions are formed at both ends of the edge.

In addition, the ladder plate is accommodated in the housing to secure a paste application space.

In addition, the leak prevention part is characterized in that it comprises an extension piece extending from the second body toward the first body and a receiving portion cut-out in the first body to accommodate the extension piece.

In addition, support embossing for supporting the joint between the first body and the second body is formed at central portions of both side surfaces of the cooling device.

In addition, it characterized in that it further comprises an adapter for introducing or discharging exhaust gas into the housing, and a stopper provided in the housing to reverse the flow of the exhaust gas.

The cooling water flow path type easyR cooler according to the present invention improves the coupling structure of the housing to ensure the flatness of the outer surface of the housing, improves assembly, and is airtightly coupled to prevent the leakage of cooling water. Has.

In addition, the present invention has an effect of preventing the occurrence of sagging caused by a jig during welding because the rigidity is improved so that the shape of the housing can be continuously maintained.

In addition, according to the present invention, a baffle is provided between the housing and the cooling device, so that the flow of cooling water is parallel to the flow of exhaust gas flowing through the cooling device, thereby improving heat exchange efficiency.

1 is a perspective view of a cooling water channel type RG cooler according to an embodiment of the present invention.
2 is an exploded perspective view of a cooling water channel type RG cooler according to an embodiment of the present invention.
3 is a view showing the inside of the housing of the coolant flow path type RG cooler according to an embodiment of the present invention.
4 is a cross-sectional view of a cooling water channel type RG cooler according to an embodiment of the present invention.
5 is a view showing a coupling part of a cooling water flow path type RG cooler according to an embodiment of the present invention.
6 is a view showing the flow of exhaust gas and cooling water of the cooling water flow path type RG cooler according to an embodiment of the present invention.
7 is a diagram illustrating a velocity distribution of cooling water by a baffle of a cooling water channel type RG cooler according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, an embodiment of the cooling water flow path type RG cooler according to the present invention will be described.

In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is a perspective view of a cooling water flow channel type RG cooler according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a cooling water flow channel type RG cooler according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. A view showing the inside of a housing of a cooling water flow channel type RG cooler according to an embodiment, FIG. 4 is a cross-sectional view of a cooling water flow channel type RG cooler according to an embodiment of the present invention, and FIG. It is a view showing the coupling part of the cooling water flow path type RG cooler, Figure 6 is a view showing the flow of the exhaust gas and the cooling water of the cooling water flow path type RG cooler according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention It is a velocity distribution diagram of the cooling water by the baffle of the cooling water flow path type EZR cooler according to.

Referring to FIGS. 1 to 7, the coolant flow path type RG cooler 100 according to an embodiment of the present invention includes a housing 110, a coupling part 120, a cooling device 150, and a ladder plate 130. Include.

The housing 110 is composed of a first body 112 and a second body 114 facing each other. To explain this in detail, the first body 112 and the second body 114 are divided into upper and lower portions, each of which is formed in a'C'-shaped cross-sectional shape facing each other, and is coupled by a coupling portion 120 to be described later. A square tube-shaped housing 110 is formed.

Substantially, as shown in FIG. 2, the first body 112 is provided on the upper side, and the second body 114 is provided on the lower side. Further, the housing 110 is provided with a cooling water inlet 115 and a cooling water outlet 113 through which cooling water flows into the cooling device 150 to transfer heat to the outside. That is, a cooling water outlet 113 is formed at a rear end of the first body 112 and a cooling water inlet 115 is formed at a front end of the second body 114.

The coupling part 120 is to couple the first body 112 and the second body 114, and is formed at the edge of the first body 112 to contact the inner surface of the second body 114. ). Since the first and second bodies 112 and 114 are formed in a'C'-shaped cross-sectional shape, the coupling end 122 extends downward from both edges of the first body 112 to the inner sides of both sides of the second body 114 Come into contact with it. To this end, the coupling end 122 is formed to be stepped, and the joint portion between the first body 112 and the second body 114 may maintain a horizontal line.

In this embodiment, it is shown that the coupling end 122 is formed on the first body 112, but the coupling end 122 may be formed on the second body 114, and the first and second bodies 112 and 114 Various design changes to be combined are possible.

The coupling end 122 is formed shorter than the edge length of the first body 112. This is to secure the coupling space of the ladder plate 130 to be described later. The ladder plate 130 is formed with a plurality of inlet portions 132 partitioned at predetermined intervals so that the object to be cooled flows into the cooling device 150, and bundles the cooling device 150 so that the front end of the housing 110 and the Each is provided at the rear end, since the coupling end 122 is formed shorter than the edge length of the first body 112, the ladder plate 130 is accommodated in the housing 110 and does not protrude outside the housing 110. . In addition, since the ladder plate 130 is supported by the coupling end 122, it is possible to prevent the ladder plate 130 from being pushed into the housing 110.

At this time, the ladder plate 130 is recessed into the housing 110 to secure a paste application space (G). The paste is made of nickel paste, and a vacuum furnace is applied by applying the paste to the gap between the housing 110 and the ladder plate 130 to fix the ladder plate 130 for bundling the cooling device 150 inside the housing 110. Welding is performed at, and since the ladder plate 130 is accommodated by 0.1mm depression into the housing 110, a large amount of paste can be applied, thereby improving welding efficiency.

In addition, leak prevention portions 140 are formed at both ends of the edges of the first body 112 and the second body 114.

The leak prevention part 140 is a receiving part that is cut in the first body 112 so that the extension piece 142 and the extension piece 142 extending from the second body 114 toward the first body 112 are accommodated ( 144). This is because the coupling end 122 does not extend to both ends of the first body 112, the first body 112 and both ends of the second body 114 may have a gap, but by the leak prevention unit 140 This can be prevented.

The cooling device 150 is provided inside the housing 110 to form a flow path for exhaust gas. At this time, the inner surface of the housing 110 is formed to be large to be spaced apart from the cooling device 150, the cooling device 150 provided in the housing 110 is the ladder plate 130 and the cooling device 150 It is supported by a plurality of embosses to be formed. This is to facilitate the flow of coolant introduced and discharged into the housing 110 through the coolant inlet 115 and the coolant outlet 113 of the housing 110.

Support embosses 153 for supporting the joints between the first body 112 and the second body 114 are formed at the central portions of both sides of the cooling device 150. The support emboss 153 supports the coupling end 122 of the first body 112 to separate the cooling device 150 and prevents sagging of the joint portion of the housing 110.

The cooling device 150 is built in a plurality of pin covers 152 having a tubular shape so that a flow path of exhaust gas is formed, and the pin cover 152 is built in a regular square wave shape. It includes a fin structure 158 that partitions the space. The pin structure 158 is formed to have the same length as the length of the pin cover 152 in the longitudinal direction. In addition, a plurality of bent surfaces that are bent in the width direction to form a square wave shape are formed, and among the bent surfaces, the inner surfaces perpendicular to the two opposite inner surfaces of the pin cover 152 are curved at predetermined intervals. Is formed.

Through this, when passing through the corrugated curve 159 formed on the inner surface by the inertial force generated by the flow of the exhaust gas, the eddy current generated in the exhaust gas is optimized to minimize the resistance to the exhaust gas flow while maximizing the residence time. do.

A plurality of guide embosses 154 are formed on the upper and lower surfaces of each of the pin covers 152 to support the pin covers 152 to be spaced apart from each other and to guide the flow of cooling water flowing into the housing 110. At this time, a guide emboss 154 is formed on the inner surface of the housing 110 so as to correspond to the guide emboss 154 of the pin cover 152. Accordingly, the guide emboss 154 of each pin cover 152 is supported and spaced apart from each other, and the outermost pin cover 152 from the housing 110 is also supported spaced apart.

The guide emboss 154 includes a straight emboss 156 and a curvature emboss 157 to guide the cooling water introduced into the cooling water inlet 115 of the housing 110 to the cooling water outlet 113 of the housing 110 do. The straight emboss 156 and the curvature emboss 157 guide the flow of cooling water in parallel with the direction of the exhaust gas flowing along the longitudinal direction of the pin cover 152.

A baffle 160 is provided between the housing 110 and the cooling device 150 to prevent the flow of cooling water from being biased. A plurality of baffles 160 are provided on the upper end of the cooling device 150 as shown in FIG. 2. The baffle 160 is provided in a direction crossing the pin cover 152, and a protrusion 162 is formed so as to be fitted between the pin covers 152. This baffle 160 prevents the cooling water introduced through the cooling water inlet 115 formed in the second body 114 from flowing in the shortest distance to the cooling water outlet 115 by pressure, and the cooling device 150 ), it improves the heat exchange efficiency of cooling water and exhaust gas.

It includes an adapter 180 for introducing or discharging exhaust gas into the housing 110 and a stopper 190 provided on the housing 110 to reverse the flow of the exhaust gas. The adapter 180 is connected to the EGR, and is connected by the housing 110 and the flange 170. In addition, the plug 190 is an adapter to re-introduce the exhaust gas that is cooled and discharged by flowing into the pin cover 152 group 1 (A) through the adapter 180 to the pin cover 152 group 2 (B). It is formed in an arc shape at the end of the housing 110 which is symmetric with 180). Here, group 1 (A) is the upper part of the six pin covers 152 through which exhaust gas flows from the adapter 180, as shown in FIG. 2, and group 2 (B) is the exhaust gas re-inflow through the medium. It is the lower part of the six pin covers 152 that are.

Hereinafter, the operation and effect of the cooling water flow channel type RG cooler according to an embodiment of the present invention having the above structure will be described as follows.

Looking at the assembly of the cooling water flow channel type easyR cooler 100 according to the present embodiment as shown in FIG. 2, each pin cover 152 is arranged side by side, and the baffle 160 is arranged in the pin cover 152. Fix it on the top. Since guide embosses 154 are formed on both sides of each of the pin covers 152 to make contact with each other, the pin covers 152 may be spaced apart at a predetermined interval. In addition, the protrusion 162 of the baffle 160 is fitted and coupled between each of the pin covers 152.

In addition, ladder plates 130 are fitted at the front and rear ends of each pin cover 152. The ladder plate 130 is formed with an inlet so that each pin cover 152 is fitted, so that each pin cover 152 can be bundled and fixed.

When the cooling device 150 is coupled in this way, the housing 110 is coupled around the cooling device 150. The housing 110 is composed of a first body 112 provided at an upper portion and a second body 114 provided at a lower portion of the housing 110 and has a'C' cross-sectional shape facing each other and is fastened by the coupling portion 120, It is formed in the shape of a square tube. That is, as shown in FIG. 4 or 5, the coupling end 122 provided at the edge of the first body 112 comes into contact with the inner edge of the second body 114, and the first body ( 112) and the second body 114 are combined. Since the coupling end 122 is formed by refracting from the first body 112 to the thickness of the second body 114, when the first body 112 and the second body 114 are combined, the first body 112 and the second body 2 The body 114 can secure a flatness. In addition, the extension pieces 142 formed at both ends of the edges of the second body 114 are engaged with the receiving portions 144 of the first body 112.

The cooling device 150 is fixed inside the housing 110 coupled as described above. The cooling device 150 is inserted into the housing 110, and the guide emboss 154 formed on the inner surface of the housing 110 abuts the guide emboss 154 on the outermost side of the pin cover 152 and is spaced apart from each other. do. At this time, the support emboss 153 is formed in the center of both side surfaces of the cooling device 150, and the support emboss 153 contacts the coupling end 122 of the first body 112.

Further, the ladder plate 130 which is coupled to the front end and the rear end of the cooling device 150 to bundle and fix the cooling device 150 is recessed and accommodated in the front and rear ends of the housing 110. As shown in FIG. 3, the ladder plate 130 is accommodated inside the housing 110 and is supported by contacting the coupling end 122. At this time, the ladder plate 130 is accommodated by being depressed by 0.1 mm in the housing 110. This makes it possible to secure a space for applying the paste.

A flange 170 is coupled to the front end of the housing 110 and a stopper 190 is coupled to the rear end of the housing 110 to complete the coupling. After the housing 110 is coupled in this way, nickel paste is applied to the joints of each component, and then heated at 1800° C. in a vacuum furnace to be welded. During welding, the central portion of the housing 110 coupled by the coupling portion 120 is supported by the support emboss 153, so that sagging due to the jig can be prevented.

Further, the front and rear ends of the edges of the housing 110 that are not covered by the coupling end 122 are firmly fixed to prevent leakage by the leak prevention unit 140.

Thereafter, referring to exhaust gas recirculation and cooling according to the present embodiment, an adapter 180 for introducing or discharging exhaust gas into or out of the housing 110 is mounted using the flange 170 coupled to the housing 110. Accordingly, exhaust gas flows into group 1 (A), which is the upper end of the cooling device 150 through the adapter 180, is returned by the stopper 190, and flows to the second group B, which is the lower end, and the adapter 180 Is discharged through.

The flow of the exhaust gas is made through the pin cover 152, the pin cover 152 is provided with a pin structure 158, the pin structure 158 is formed with a wavy curve 159 bent in the longitudinal direction By optimizing the vortex generated in the exhaust gas, the residence time is maximized while minimizing the resistance to blocking the exhaust gas flow. Thus, the cooling water supplied to the housing 110 and heat exchange efficiency can be maximized.

The coolant introduced through the coolant inlet 115 of the housing 110 is guided by a guide emboss 154 formed on the pin cover 152. The guide emboss 154 is composed of a straight emboss 156 and a curvature emboss 157 and guides the cooling water introduced through the cooling water inlet 115 to be parallel to the exhaust gas flowing through the fin cover 152 so that the cooling water and the exhaust gas It improves heat exchange efficiency.

At this time, as shown in FIG. 6, a baffle 160 is provided between the housing 110 and the cooling device 150 to prevent the coolant from flowing from the coolant inlet 115 to the shortest distance of the coolant outlet 113 Can improve heat exchange efficiency. That is, the coolant flowing into the coolant inlet 115 collides with the baffle 160 to generate a vortex, and moves in parallel with the exhaust gas along the guide emboss 154. As shown in FIG. 7, it is possible to check the moving flow of the cooling water shown in light blue.

As described above, according to the coolant flow path type EasyR cooler according to an embodiment of the present invention, the flatness of the outer surface of the housing can be secured by improving the coupling structure of the housing, and assembling property is improved as well as airtight assembly. As a result, leakage of cooling water can be prevented, and rigidity is improved so that the shape of the housing can be continuously maintained.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand.

Therefore, the true technical protection scope of the present invention should be determined by the claims.

100: coolant flow path type easyR cooler 110: housing
112: first body 113: cooling water outlet
114: second body 115: cooling water inlet
120: coupling part 122: coupling end
130: ladder plate 132: inlet
140: link prevention unit 142: extension
144: receiving part 150: cooling device
152: pin cover 153: support emboss
154: guide emboss 156: straight emboss
157: curvature emboss 158: pin structure
159: wave bending 160: baffle
162: protrusion 170: flange
180: adapter 190: stopper
A: Group 1 B: Group 2
G: Application space

Claims (7)

A housing comprising a first body and a second body facing each other;
A coupling portion for coupling the first body and the second body;
A cooling device provided inside the housing; And
It includes a ladder plate coupled to the housing to limit the flow of the cooling device,
The coupling portion includes a coupling end formed stepped at the edge of the first body to contact the inner surface of the second body,
The cooling device,
A plurality of pin covers having a tubular shape to form a flow path for exhaust gas; And
It is built into the inside of the pin cover and comprises a pin structure consisting of a regular square wave shape to partition the inner space of the pin cover,
A baffle provided in a direction intersecting with the pin cover to prevent the flow of cooling water from being biased, and having a protrusion to be fitted between the pin covers;
Support embossing is formed at the center of both side surfaces of the cooling device to support the joint between the first body and the second body in contact with the coupling end,
A plurality of guide embosses are formed on the upper and lower surfaces of the pin cover to support the pin cover and guide the flow of coolant flowing into the housing,
The guide embossed coolant flow path type easyR cooler, characterized in that it comprises a straight emboss and a curvature emboss for guiding the flow of the coolant in parallel with the direction of the exhaust gas flowing along the longitudinal direction of the fin cover.
delete The method of claim 1,
The coupling end is formed to be shorter than an edge length of the first body to secure a coupling space of the ladder plate;
A cooling water flow path type easyR cooler, characterized in that a leak prevention part is formed at both ends of the edges of the first body and the second body.
The method of claim 3,
The ladder plate is a cooling water flow passage type easyR cooler, characterized in that it is recessed to the inside of the housing to secure a paste application space.
The method of claim 3,
The leak prevention part extends from the second body toward the first body; And
Coolant flow path type easyR cooler, characterized in that it comprises a receiving portion cut in the first body to accommodate the extension piece.
delete The method of claim 1,
An adapter for introducing or discharging exhaust gas into the housing, and a stopper provided in the housing to reverse the flow of the exhaust gas.

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