WO2015141884A1

WO2015141884A1 - Cooling water passage type egr cooler

Info

Publication number: WO2015141884A1
Application number: PCT/KR2014/002420
Authority: WO
Inventors: 박문걸; 황제성
Original assignee: 주식회사 다우정밀
Priority date: 2014-03-21
Filing date: 2014-03-21
Publication date: 2015-09-24

Abstract

Disclosed is a cooling water passage type EGR cooler. The disclosed cooling water passage type EGR cooler comprises: a housing having a first body and a second body, which face each other; a coupling part for coupling the first body and the second body; a cooling device provided to the inside of the housing; and a ladder plate coupled to the housing to control the movement of the cooling device.

Description

Coolant flow path type EZ cooler

The present invention relates to a coolant flow path type easy cooler, and more particularly, to improve the coupling structure of the housing to prevent the outflow of the coolant, to improve the rigidity so that the shape of the housing can be continuously maintained, and the heat exchange efficiency It relates to a coolant flow path type easy cooler that can be improved.

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

The EZC cooler is coupled to a housing part such as an upper body and a lower body to form a housing into which a cooling device is inserted, and an adapter and a plug are provided to enable exhaust gas to be transferred to the cooling device.

On the other hand, Korean Patent Publication No. 2008-0003513 (published: 2008.01.08.) Discloses "EGR cooler".

An object of the present invention to improve the coupling structure of the housing to prevent the outflow of the coolant, to provide a coolant flow path type easy cooler to improve the rigidity to maintain the shape of the housing continuously.

In addition, another object of the present invention is to provide a coolant flow path type easy cooler provided with a baffle between the housing and the cooling device to improve the heat exchange efficiency by making the flow of cooling water parallel to the flow of exhaust gas flowing through the cooling device.

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

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

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

In addition, the ladder plate is characterized in that the paste coating space is secured to the inside of the housing.

The leak prevention part may include an extension piece extending from the first body to the second body side and an accommodation part formed in the second body so that the extension piece is accommodated.

In addition, both sides of the central portion of the cooling device is characterized in that the supporting emboss is formed to support the joints of the first body and the second body.

The apparatus may further include an adapter for introducing or discharging the exhaust gas into the housing, and a stopper provided in the housing for inverting the flow of the exhaust gas.

In addition, the cooling device includes a plurality of fin covers formed in a tubular shape to form a flow path of the exhaust gas and a fin structure for partitioning an internal space of the fin cover, which is formed inside the fin cover and has a regular square wave shape. It is characterized by.

In addition, the fin structure is characterized in that the curved wave shape is formed at a predetermined interval in the longitudinal direction.

In addition, the upper and lower surfaces of the pin cover is characterized in that a plurality of embossing to support the pin cover spaced apart from each other, to guide the flow of cooling water flowing into the housing.

In addition, the housing is characterized in that the baffle is provided so that the flow of the cooling water is not biased.

The baffle may be provided in plural in the longitudinal direction of the cooling device in a direction opposite to the cooling water inlet of the housing.

Cooling water flow path type easy cooler according to the present invention can ensure the flatness of the outer surface of the housing by improving the coupling structure of the housing, the assembly is improved, as well as airtightly coupled to prevent the leakage of cooling water Has

In addition, the present invention has an effect that the rigidity is improved to continuously maintain the shape of the housing to prevent the sag caused by the jig during welding.

In addition, the present invention is provided with a baffle between the housing and the cooling device to improve the heat exchange efficiency by making the flow of cooling water parallel to the flow of the exhaust gas flowing through the cooling device.

1 is a perspective view of a coolant flow path type EZ cooler according to an embodiment of the present invention.

2 is an exploded perspective view of a coolant flow path type EZ cooler according to an embodiment of the present invention.

Figure 3 is a view showing the inside of the housing of the coolant flow path-type easy cooler according to an embodiment of the present invention.

Figure 4 is a cross-sectional view of the coolant flow path-type easy cooler according to an embodiment of the present invention.

5 is a view showing a coupling portion of the coolant flow path-type easy cooler according to an embodiment of the present invention.

6 is a view showing the flow of the exhaust gas and the cooling water of the coolant flow path type easy cooler according to an embodiment of the present invention.

7 is a velocity distribution diagram of the cooling water by the baffle of the cooling water flow path type EZ cooler according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a coolant flow path type easy cooler according to the present invention.

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

1 is a perspective view of a coolant flow path type easy cooler according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a coolant flow path type easy cooler according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating a coolant flow path type easy cooler according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the coolant flow path type easy cooler according to an embodiment of the present invention, and FIG. 6 is a view showing a coupling portion of the coolant flow path type EZ cooler, FIG. 6 is a view showing the flow of the exhaust gas and the coolant of the coolant flow path type EZR cooler according to an embodiment of the present invention, and FIG. 7 is an embodiment of the present invention. The velocity distribution of the cooling water by the baffle of the cooling water flow path type EZ cooler according to the present invention.

1 to 7, the coolant flow path type EZ cooler 100 according to an embodiment of the present invention may include 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. In detail, the first body 112 and the second body 114 are divided into upper and lower parts, each made of a 'c' cross-section facing each other, is coupled by the coupling portion 120 to be described later A housing 110 having a square tube shape is formed.

As shown in FIG. 2, the first body 112 is provided at an upper portion, and the second body 114 is provided at a lower portion. In addition, the housing 110 is provided with a coolant inlet 115 and a coolant outlet 113 into which the coolant 150 to be described later is heat-transmitted to the outside. That is, the coolant inlet 113 is formed at the rear end of the first body 112, and the coolant inlet 115 is formed at the front end of the second body 114.

Coupling portion 120 is to be coupled to the first body 112 and the second body 114, is formed on the edge of the first body 112, the coupling end 122 in contact with the inner surface of the second body (114) ). Since the first and

second bodies

112 and 114 have a 'c' cross-sectional shape, the coupling end 122 extends downwardly from both side edges of the first body 112 to the inner side surfaces of both sides of the second body 114. You will come across. To this end, the coupling end 122 is formed to be stepped, and the joints of the first body 112 and the second body 114 may maintain a horizontal line.

Although the coupling end 122 is formed in the first body 112 in the present embodiment, the coupling end 122 may be formed in the second body 114, and the first and

second bodies

112 and 114 may be formed. Various design changes are possible.

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. Ladder plate 130 is formed with a plurality of inlet 132 spaced a predetermined interval so that the object to be cooled into the cooling device 150, and the front end of the housing 110 by the bundle process of the cooling device 150 It is provided at the rear end, respectively, since the coupling end 122 is formed to be shorter than the edge length of the first body 112, the ladder plate 130 is accommodated in the housing 110 does not protrude out of the housing 110. . In addition, the ladder plate 130 is supported by the coupling end 122 can be prevented from being pushed into the housing 110.

At this time, the ladder plate 130 is recessed and accommodated inside the housing 110 to secure the paste coating space (G). The paste is made of nickel paste, and the paste is applied to a gap between the housing 110 and the ladder plate 130 to fix the ladder plate 130, which bundles the cooling device 150, to the inside of the housing 110. In the welding, the ladder plate 130 is accommodated 0.1mm recessed into the housing 110, so that a large amount of paste can be applied to improve the welding efficiency.

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

The leak prevention part 140 may include an extension part 142 extending from the second body 114 to the first body 112 and an accommodation part formed in the first body 112 so that the extension piece 142 is accommodated. 144). This is because the coupling end 122 does not extend to both ends of the first body 112, both ends of the first body 112 and the second body 114 may have a gap, by the leak prevention portion 140 This can be prevented.

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

Support embossing 153 is formed at both central portions of the cooling device 150 to support the joints of the first body 112 and the second body 114. The support emboss 153 supports the coupling end 122 of the first body 112 to space the cooling apparatus 150 and to prevent the joint portion of the housing 110 from sagging.

The cooling device 150 includes a plurality of fin covers 152 having a tubular shape so as to form a flow path of the exhaust gas, and are formed inside the fin cover 152 and have a regular rectangular wave shape to form the fin cover 152. A fin structure 158 partitioning the space. The fin 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 are bent in the width direction to form a square wave shape, the inner surface perpendicular to the two inner surfaces facing the pin cover 152 of the bent surface is curved at a predetermined interval 159 Is formed.

By optimizing the vortices generated in the exhaust gas when passing the corrugation bend 159 formed on the inner surface by the inertial force generated by the flow of the exhaust gas, the residual time is minimized while minimizing the resistance to block the exhaust gas flow. do.

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

The guide emboss 154 includes a straight emboss 156 and a curvature emboss 157 to guide the coolant flowing into the coolant inlet 115 of the housing 110 to the coolant outlet 113 of the housing 110. do. The straight emboss 156 and the curvature emboss 157 guide the flow of the coolant to be parallel to the direction of the exhaust gas flowing along the longitudinal direction of the fin 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. As shown in FIG. 2, the baffle 160 is provided in plurality at the upper end of the cooling device 150. The baffle 160 is provided in a direction crossing the pin cover 152, and a protrusion 162 is formed to be sandwiched between the pin covers 152. The baffle 160 prevents the coolant flowing through the coolant inlet 115 formed in the second body 114 from flowing at the shortest distance to the coolant outlet 115 by pressure, and the cooling device 150. By evenly passing through the entire surface of), the heat exchange efficiency of cooling water and exhaust gas is improved.

Adapter 180 for introducing or discharging the exhaust gas into the housing 110 and a stopper 190 provided in the housing 110 to reverse the flow of the exhaust gas. The adapter 180 is connected to the EGR and connected by the housing 110 and the flange 170. In addition, the stopper 190 may be introduced into the pin cover 152 1 group A through the adapter 180 to reflow the exhaust gas cooled and discharged into the pin cover 152 2 group B. It is formed in an arc shape at the end of the housing 110 which is symmetrical with the 180. Here, the first group (A) is the upper end of the six pin cover 152 through which the exhaust gas flows from the adapter 180 as shown in FIG. 2, and the second group (B) reintroduces the exhaust gas by the medium. It is the lower end of the six pin cover 152.

Hereinafter, the operation and effects of the cooling water flow path type EZC cooler according to an embodiment of the present invention having the above structure will be described.

As shown in FIG. 2, the assembly of the coolant flow path type EZC cooler 100 according to the present embodiment is arranged. Each of the fin covers 152 is arranged side by side, and the baffle 160 is disposed of the fin covers 152. Secure to the top. Guide embosses 154 are formed on both sides of each of the pin covers 152 so that the pin covers 152 may be spaced apart from each other. Then, the protrusion 162 of the baffle 160 is fitted between each of the pin cover 152 is coupled.

In addition, the ladder plate 130 is fitted to the front and rear ends of each pin cover 152. Ladder plate 130 is formed in the inlet is formed so that each pin cover 152 may be fixed to the bundle of each pin cover 152.

As such, when the cooling device 150 is coupled, the housing 110 is coupled to the circumference of the cooling device 150. The housing 110 is composed of a first body 112 provided at the upper portion and a second body 114 provided at the lower portion, and is formed in a 'c'-shaped cross-section facing each other, thereby being fastened by the coupling part 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 is in contact with the inner surface of the edge of the second body 114, by welding the first body ( 112 and the second body 114 is coupled. Since the coupling end 122 is formed by refraction from the first body 112 by the thickness of the second body 114, when the first body 112 and the second body 114 are coupled, the first body 112 and the first body 112 are formed. 2 body 114 can secure the flatness. The extension pieces 142 formed at both ends of the edge of the second body 114 are engaged with the receiving portion 144 of the first body 112.

The cooling device 150 is fixed to the inside of 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 side of the housing 110 abuts against the guide emboss 154 on the outermost side of the pin cover 152. do. At this time, the support emboss 153 is formed in the center of both sides of the cooling device 150, the support emboss 153 is in contact with the coupling end 122 of the first body (112).

In addition, the ladder plate 130 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 received in the front end and the rear end of the housing 110. As shown in FIG. 3, the ladder plate 130 is received inside the housing 110 and is supported in contact with the coupling end 122. At this time, the ladder plate 130 is housed in the housing 110 0.1mm recessed. This makes it possible to secure a space for applying the paste.

The flange 170 is coupled to the front end of the housing 110, and the 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 the respective parts, and is heated and welded at 1800 ° C. in a vacuum furnace. Since the central portion of the housing 110 coupled by the coupling portion 120 at the time of welding is supported by the support embossing 153, it is possible to prevent sagging due to the jig.

In addition, the front and rear edges of the housing 110, which the coupling end 122 does not cover, are firmly fixed to prevent leakage by the leak prevention part 140.

Subsequently, referring to the exhaust gas recirculation and cooling according to the present embodiment, an adapter 180 for introducing or discharging the exhaust gas into the housing 110 using the flange 170 coupled to the housing 110 is mounted. Therefore, the exhaust gas flows into the first group A of the upper end of the cooling device 150 through the adapter 180, and is returned by the stopper 190 to flow into the second group B of the lower end of 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 fin structure 158, the fin structure 158 is a wave shape bend 159 curved in the longitudinal direction is formed Vortex generated in the exhaust gas is optimized to maximize the residence time while minimizing the resistance to the exhaust flow. Therefore, the cooling water and heat exchange efficiency supplied to the housing 110 may be maximized.

The coolant flowing through the coolant inlet 115 of the housing 110 is guided by the guide emboss 154 formed in the pin cover 152. The guide emboss 154 includes a straight emboss 156 and a curvature emboss 157 to guide the coolant introduced through the coolant inlet 115 so that the coolant flows in parallel with the exhaust gas flowing through the pin cover 152. Improve heat exchange efficiency

In this case, 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 introduced into the coolant inlet 115 may collide with the baffle 160 to generate vortices and move parallel to the exhaust gas along the guide emboss 154. As shown in Figure 7 it can be seen the flow of the cooling water in the bright portion.

As described above, according to the coolant flow path type EZC 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 the assemblability is improved, as well as airtight assembly. Therefore, it is possible to prevent the leakage of the cooling water, and the rigidity is improved to maintain the shape of the housing continuously.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

Claims

A housing comprising a first body and a second body facing each other;

A coupling part for coupling the first body and the second body;

A cooling device provided in the housing; And

And a ladder plate coupled to the housing to limit the flow of the cooling device.
The method of claim 1,

The coupling portion is formed on the edge of the first body coolant flow path type easy cooler, characterized in that it comprises a coupling end in contact with the inner surface of the second body.
The method of claim 2,

The coupling end is formed shorter than the length of the edge of the first body to secure the coupling space of the ladder plate;

Cooling flow path type easy cooler, characterized in that the leakage preventing portion is formed on both ends of the edge of the first body and the second body.
The method of claim 3, wherein

The ladder plate is accommodated inside the housing to secure a paste coating space, characterized in that the coolant flow path type easy cooler.
The method of claim 3, wherein

The leak prevention portion extends from the first body to the second body side; And

Cooling flow path type easy cooler, characterized in that it comprises an accommodating portion formed on the second body so that the extension piece is accommodated.
The method of claim 1,

Cooling flow channel type EIG cooler, characterized in that the supporting emboss is formed on both sides of the central portion of the cooling device for supporting the joints of the first body and the second body.
The method of claim 1,

An adapter for introducing or discharging the exhaust gas into the housing, and a stopper provided in the housing for inverting the flow of the exhaust gas further comprises a coolant flow path type easy cooler.
The method of claim 1,

The cooling device includes a plurality of fin covers formed in a tubular shape so that the flow path of the exhaust gas is formed; And

Coolant flow path type E-G cooler, characterized in that the pin cover is formed inside the fin cover and has a regular square wave shape to partition the inner space of the pin cover.
The method of claim 8,

The fin structure is a coolant flow path easy cooler, characterized in that the curved wave form is formed at a predetermined interval in the longitudinal direction.
The method of claim 8,

Cooling flow path easy cooler, characterized in that the upper and lower surfaces of the pin cover are spaced apart from each other, a plurality of emboss is formed to guide the flow of the cooling water flowing into the housing.
The method of claim 8,

Cooling flow path easy cooler, characterized in that the housing is provided in the baffle to prevent the flow of the cooling water is unbiased.
The method of claim 11,

And a plurality of the baffles are provided in the longitudinal direction of the cooling device in a direction opposite to the cooling water inlet of the housing.