An integrated water passage EGR cooler

Abstract

The application provides an EGR cooler with integrated water channel, which comprises a cooler shell, a detachable air outlet connecting plate is installed at one end of the cooler shell away from an air inlet end cover, a complex water channel is integrally formed on one side of the cooler shell, a plurality of first water inlets are uniformly installed on one side of the complex water channel and communicated with the complex water channel, a first communication port is formed on the side of the complex water channel away from the first water inlets, a second communication port is formed on the outer surface of the end of the cooler shell close to the air inlet end cover and matched with the first communication port, a switching valve is installed at the area formed by the first communication port and the second communication port and used for controlling the on-off of the first communication port and the second communication port, and a water outlet is installed on the outer surface of the end of the cooler shell close to the one-way valve. The application has the advantages that the complex water channel and the cooler shell are combined together, one water channel casting is reduced, and the sealing risk between the two is reduced.

Description

Technical Field

[0001] This invention is an EGR cooler with integrated water channels, belonging to the field of coolers. Background Technology

[0002] The basic principle of Exhaust Gas Recirculation (EGR) technology is to introduce a portion of the exhaust gas into the intake manifold to increase the exhaust gas composition in the air-fuel mixture. Because the exhaust gas contains triatomic molecules such as water vapor and carbon dioxide, which have a high specific heat, this effectively lowers the maximum combustion temperature in the cylinder, thereby reducing NOx emissions. The EGR cooler consists of a housing with a core for airflow, and a complex water channel connected to the housing for introducing cooling water. Currently, the complex water channel and housing are assembled together, and the connection points require sealing rings, which inherently increases the risk of leakage. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an EGR cooler with integrated water channels to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an EGR cooler with integrated water channels, comprising a cooler housing, wherein multiple equidistant cores for the flow of high-temperature gas are installed inside the cooler housing; an inlet end cap is installed at one end of the cooler housing; a detachable outlet connection plate is installed at the end of the cooler housing away from the inlet end cap; a one-way valve is installed on the side of the outlet connection plate opposite to the cooler housing; a complex water channel integrally formed with the cooler housing is provided on one side of the cooler housing; multiple first water inlets communicating with the complex water channel are evenly installed on one side of the complex water channel; a first connecting port is opened on the side of the complex water channel opposite to the first water inlets; a second connecting port cooperating with the first connecting port is opened on the outer surface of the end of the cooler housing near the inlet end cap; a switching valve for controlling the opening and closing of the first and second connecting ports is installed in the area formed by the first and second connecting ports; a second water inlet is installed on the outer surface of the switching valve; and a water outlet is installed on the outer surface of the end of the cooler housing near the one-way valve.

[0005] Furthermore, multiple reinforcing ribs are uniformly fixed on the surface of the cooler shell, and the reinforcing ribs and the cooler shell are integrally formed. The water outlet and the cooler shell are also integrally formed.

[0006] Furthermore, the outer surface of the first water inlet is fixed with multiple fixing holes for inserting bolts, and the first water inlet and the complex waterway are integrally formed.

[0007] Furthermore, a first positioning post for matching screws is fixed on the side of the outer surface of the complex waterway away from the outlet. The first positioning post has a plurality of first connecting ribs evenly fixed on its outer surface. The first connecting ribs are connected and fixed to the complex waterway.

[0008] Furthermore, a plurality of second positioning posts for matching screws are fixed on the outer surface of the cooler housing near the air inlet end cover. A plurality of second connecting ribs are uniformly fixed on the outer surface of the second positioning posts, and the second connecting ribs are connected and fixed to the cooler housing.

[0009] Furthermore, the end of the air intake cover away from the cooler housing is connected and fixed with a connecting seat, and a plurality of small holes for inserting bolts are evenly opened on one side of the connecting seat, and the cross-section of the air intake cover is trapezoidal.

[0010] Furthermore, the cooler housing has a plurality of screw holes evenly distributed on the side facing the air outlet connecting plate, and the air outlet connecting plate has a plurality of through holes that mate with the screw holes on the side facing away from the cooler housing. A positioning screw that is threadedly connected to the screw hole is inserted into the through hole, and the diameter of the positioning screw is smaller than the inner diameter of the through hole.

[0011] The beneficial effects of this invention are:

[0012] 1. By combining the complex water channels and the cooler housing together, one water channel casting is reduced, while also reducing the risk of sealing issues between the two.

[0013] 2. The traditional outer shell is split into two parts: the air outlet connecting plate and the cooler shell. The verticality of the core can be finely adjusted by the hole diameter of the air outlet connecting plate and the spacing of the positioning screws, reducing the verticality requirements of the core during assembly. The air outlet connecting plate and the dual air outlets at one end of the core are sealed with O-rings, and the cooler shell and the air outlet connecting plate are sealed with rectangular rings, which can effectively isolate water vapor.

[0014] 3. By switching valves to connect the first connection port to the second connection port or the second water inlet to the second connection port, the water inlet method can be changed as needed, thereby reducing the cost of mold development. Attached Figure Description

[0015] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of an EGR cooler with integrated water channels according to the present invention;

[0017] Figure 2 This is another perspective view of an EGR cooler with integrated water channels according to the present invention;

[0018] Figure 3 This is an assembly diagram of the air outlet connection plate, water outlet, complex water channels, and cooler shell in an EGR cooler with integrated water channels according to the present invention.

[0019] Figure 4 This is an assembly diagram of the switching valve, outlet, complex water channels, and cooler housing in an EGR cooler with integrated water channels according to the present invention.

[0020] Figure 5 This is a perspective view of the intake end cover in an EGR cooler with integrated water channels according to the present invention.

[0021] Figure 6 This is a perspective view of the core of an EGR cooler with integrated water channels according to the present invention;

[0022] In the diagram: 1-Cooler housing, 2-Air inlet cover, 3-First water inlet, 4-Fixing hole, 5-First positioning post, 6-Complex water channel, 7-Connecting seat, 8-First connecting port, 9-Second connecting port, 10-Second positioning post, 11-Reinforcing rib, 12-One-way valve, 13-Water outlet, 14-Air outlet connecting plate, 15-Converting valve, 16-Second water inlet, 17-Core. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6This invention provides a technical solution: an integrated water channel EGR cooler, comprising a cooler shell 1, wherein multiple equidistantly arranged cores 17 for the flow of high-temperature gas are installed inside the cooler shell 1, and multiple reinforcing ribs 11 integrally formed with the cooler shell 1 are uniformly fixed on the surface of the cooler shell 1. The design of the reinforcing ribs 11 improves the structural strength of the cooler shell 1. An air inlet end cap 2 with a trapezoidal cross-section is installed at one end of the cooler shell 1, and a connecting seat 7 is connected and fixed at the end of the air inlet end cap 2 away from the cooler shell 1. One side of the connecting seat 7 is evenly opened Multiple small holes are provided for inserting bolts. A connecting seat 7 with small holes is installed on the air inlet end cover 2 to facilitate the connection between the air inlet end cover 2 and the air supply pipe. Multiple second positioning posts 10, which are integrally formed with the air inlet end cover 2, are fixed on the outer surface of the cooler shell 1. These second positioning posts 10 are used to match the screws. Multiple second connecting ribs that are evenly fixed on the outer surface of the second positioning posts 10 are connected and fixed to the cooler shell 1, thereby improving the mechanical strength of the connection between the second positioning posts 10 and the cooler shell 1. The second positioning posts 10 and the screws cooperate to restrict the position of the cooler shell 1.

[0025] See Figure 1 , Figure 2 , Figure 3 and Figure 4 An exhaust connection plate 14 is installed at the end of the cooler housing 1 away from the air inlet end cover 2. A one-way valve 12 is installed on the side of the exhaust connection plate 14 away from the cooler housing 1. Multiple screw holes are evenly opened on the side of the cooler housing 1 facing the exhaust connection plate 14. Multiple through holes that mate with the screw holes are opened on the side of the exhaust connection plate 14 away from the cooler housing 1. Positioning screws that are threaded into the screw holes are inserted in the through holes. The diameter of the positioning screws is smaller than the inner diameter of the through holes. The traditional housing is divided into two parts: the exhaust connection plate 14 and the cooler housing 1. The verticality of the core 17 can be finely adjusted by the spacing between the hole diameter of the exhaust connection plate 14 and the positioning screws, reducing the verticality requirements of the core 17 during assembly. The dual exhaust ports installed at one end of the exhaust connection plate 14 and the core 17 are sealed with O-rings. The cooler housing 1 and the exhaust connection plate 14 are sealed with rectangular rings, which can effectively isolate water vapor.

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4A complex water channel 6 integrally formed with the cooler housing 1 is provided on one side of the cooler housing 1. Multiple first water inlets 3, communicating with the complex water channel 6, are evenly installed on one side of the complex water channel 6. The first water inlets 3 and the complex water channel 6 are integrally formed. Multiple fixing holes 4 for inserting bolts are fixed on the outer surface of the first water inlets 3. A first connecting port 8 is opened on the side of the complex water channel 6 opposite to the first water inlets 3. A second connecting port 9, cooperating with the first connecting port 8, is opened on the outer surface of the cooler housing 1 near the air inlet end cover 2. A switching valve 15 for controlling the opening and closing of the first connecting port 8 and the second connecting port 9 is installed in the area formed by the first connecting port 8 and the second connecting port 9. A second water inlet 16 is installed on the outer surface of the switching valve 15. A second water inlet 16 is installed on the outer surface of the cooler housing 1 near the one-way valve 12. There is a water outlet 13, which is integrally formed with the cooler shell 1, combining the complex water channel 6 and the cooler shell 1 together, reducing one water channel casting and reducing the sealing risk between the two. By switching valve 15, the first connecting port 8 can be connected to the second connecting port 9 or the second water inlet 16 can be connected to the second connecting port 9, so as to change the water inlet method as needed, thereby reducing the cost of mold development. On the side of the outer surface of the complex water channel 6 away from the water outlet 13, a first positioning post 5 integrally formed with the complex water channel 6 for matching screws is fixed, so that multiple first connecting ribs uniformly fixed on the outer surface of the first positioning post 5 are connected and fixed to the complex water channel 6, improving the mechanical strength of the connection between the first positioning post 5 and the complex water channel 6. The first positioning post 5 and the screw cooperate to restrict the position of the complex water channel 6.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An EGR cooler with integrated water channels, comprising a cooler housing (1), characterized in that: The cooler housing (1) is equipped with a plurality of equidistant cores (17) for the flow of high-temperature gas. An air inlet end cap (2) is installed at one end of the cooler housing (1). A detachable air outlet connection plate (14) is installed at the end of the cooler housing (1) away from the air inlet end cap (2). A one-way valve (12) is installed on the side of the air outlet connection plate (14) away from the cooler housing (1). A complex water channel (6) integrally formed with the cooler housing (1) is provided on one side of the cooler housing (1). A plurality of first water inlets (3) communicating with the complex water channel (6) are evenly installed on one side of the complex water channel (6). A first connecting port (8) is opened on the side of the complex water channel (6) away from the first water inlet (3). A second connecting port (9) that cooperates with the first connecting port (8) is opened on the outer surface of the end of the cooler housing (1) near the air inlet end cap (2). A control port (8) is installed in the area formed by the first connecting port (8) and the second connecting port (9). 8) A switching valve (15) for switching on and off the second connection port (9), wherein a second water inlet (16) is installed on the outer surface of the switching valve (15), and a water outlet (13) is installed on the outer surface of the cooler housing (1) near the one-way valve (12). The surface of the cooler shell (1) is uniformly fixed with a plurality of reinforcing ribs (11), the reinforcing ribs (11) and the cooler shell (1) are integrally formed, and the water outlet (13) and the cooler shell (1) are integrally formed; On the side of the outer surface of the complex waterway (6) away from the outlet (13), a first positioning post (5) for matching screws is fixed, which is integrally formed with the complex waterway (6). Multiple first connecting ribs are uniformly fixed on the outer surface of the first positioning post (5), and the first connecting ribs are connected and fixed to the complex waterway (6).

2. The EGR cooler with integrated water channels according to claim 1, characterized in that: The outer surface of the first water inlet (3) is fixed with multiple fixing holes (4) for inserting bolts. The first water inlet (3) and the complex waterway (6) are integrally formed.

3. The EGR cooler with integrated water channels according to claim 1, characterized in that: On the outer surface of the cooler housing (1) near the air inlet end cover (2), a plurality of second positioning posts (10) integrally formed with the cooler housing (1) for matching screws are fixed. A plurality of second connecting ribs are uniformly fixed on the outer surface of the second positioning posts (10), and the second connecting ribs are connected and fixed to the cooler housing (1).

4. An EGR cooler with integrated water channels according to claim 1, characterized in that: The end of the air intake cover (2) away from the cooler housing (1) is connected to a connecting seat (7). The connecting seat (7) has multiple small holes evenly opened on one side for inserting bolts. The cross-section of the air intake cover (2) is trapezoidal.

5. An EGR cooler with integrated water channels according to claim 1, characterized in that: The cooler housing (1) has a plurality of screw holes evenly distributed on the side facing the air outlet connecting plate (14). The air outlet connecting plate (14) has a plurality of through holes that cooperate with the screw holes on the side facing away from the cooler housing (1). A positioning screw that is threadedly connected to the screw hole is inserted in the through hole. The diameter of the positioning screw is smaller than the inner diameter of the through hole.

Images