Internal water channel integrating EGR valve and cooler

Abstract

The invention discloses an internal water channel integrating an EGR (exhaust gas recirculation) valve and a cooler, and particularly relates to the technical field of automobile engines, the internal water channel comprises a body, an EGR cooler water inlet pipe is fixedly mounted at one end of the body, an EGR valve seat is fixedly mounted at the other end of the body, and an EGR valve seat water outlet channel is formed in the EGR valve seat. Not less than six flat pipes are fixedly mounted in the body, and fin pieces which are distributed at equal intervals are fixedly arranged on the outer walls of the flat pipes; the ends of the fin pieces between every two adjacent flat pipes make contact, so that an EGR cooler internal gas side channel is formed between every two adjacent fin pieces of the same flat pipe, the EGR valve seat comprises an air inlet, the EGR cooler water inlet pipe is provided with an air outlet, and the air inlet and the air outlet are communicated with the EGR cooler internal gas side channel. And an EGR cooler internal water side channel is arranged in the flat pipe. The length of the inlet and outlet cooling pipeline externally connected with the EGR component is shortened, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive engines, and particularly to an internal water channel integrating an EGR valve and a cooler. Background Art

[0002] In diesel engine exhaust gas recirculation, in order to achieve fast control response and avoid carbon deposition, a hot-end valve is often used, that is, the exhaust gas directly passes through the EGR valve without being cooled by the cooler. Since the exhaust gas is not cooled and has a high temperature, the thermal radiation to the electrical components of the EGR valve is large, and the temperature of the temperature field where the EGR valve is located is high, there is a risk of burnout failure. To solve the cooling problem of the hot-end EGR valve and its seat, the cooling structure is integrated on the EGR valve seat. The coolant first enters the EGR valve seat for cooling, then enters the cooler, and finally flows out of the cooler.

[0003] For the parts with the structure of the existing technology, the left side is the outlet of the cooler, and the right side is the inlet of the EGR valve. However, the water return position of some engine models is exactly opposite to the water return position of the parts. In this way, the pipeline is very long, and the manufacturing cost of the parts increases. If directly reverse-connected, the air in the internal water jacket of the EGR cannot be discharged, affecting the cooling of the EGR valve. Summary of the Invention

[0004] The purpose of the present invention is to provide an internal water channel integrating an EGR valve and a cooler. By redesigning the internal water jacket of the EGR valve seat, the cooling of the EGR valve is strengthened, and the air in the water jacket is discharged, so as to meet the requirement of water inlet at the cooler end and water outlet at the EGR valve seat.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An internal water channel integrating an EGR valve and a cooler, including a body, one end of which is fixedly installed with an EGR cooler inlet pipe, and the other end is fixedly installed with an EGR valve seat. An EGR valve seat water outlet channel is opened on the EGR valve seat. It is characterized in that no less than six flat tubes are fixedly installed in the body, and fin members are fixedly arranged on the outer wall of the flat tubes at equidistant intervals;

[0006] The ends of the fin members between adjacent two flat tubes are in contact with each other, so an EGR cooler internal gas side channel is formed between adjacent two fin members of the same flat tube;

[0007] The EGR valve seat includes an air inlet, an air outlet is opened on the EGR cooler inlet pipe, and the air inlet, the air outlet and the EGR cooler internal gas side channel are communicated;

[0008] The inside of the flat tube is an EGR cooler internal water side channel, and one end of the EGR cooler internal water side channel is communicated with the EGR cooler inlet pipe, and the other end is communicated with the EGR valve seat water outlet channel.

[0009] Preferably, an EGR cooler outlet pipe is fixedly installed inside the body, and the EGR cooler outlet pipe is used to connect the ends of multiple flat tubes to the EGR valve seat water outlet passage.

[0010] Preferably, the two sides of the flat tube have a shaped plate member that is recessed inward, and a recessed groove is formed at the recess;

[0011] The two shaped plate members include vertical portions, and the two vertical portions are attached to each other;

[0012] The shaped plate member divides the internal water side channel of the EGR cooler into a first channel and a second channel, and the volume of the second channel is twice the volume of the first channel;

[0013] The second channel is communicated with the EGR cooler outlet pipe;

[0014] The first channel is communicated with the EGR valve seat water inlet passage opened on the EGR valve seat, and is connected in parallel to the liquid outlet port of the EGR valve seat water outlet passage through the EGR valve seat internal water passage opened on the EGR valve seat.

[0015] Preferably, arc-shaped grooves are formed on the adjacent surfaces of the two vertical portions, and the two arc-shaped grooves form an overflow channel, and the cross-section of the overflow channel is a rounded rectangle.

[0016] Preferably, the shaped plate member includes a first inclined portion, an arc portion, and a second inclined portion, wherein:

[0017] The arc portion is connected to the vertical portion;

[0018] The space between the two arc portions is a tower-shaped structure;

[0019] The space between the two first inclined portions is funnel-shaped, and the narrow opening of the funnel shape is communicated with the space of the tower-shaped structure;

[0020] The second inclined portion is the bottom of the first channel, and the low position in the horizontal direction is connected to the side wall of the arc portion;

[0021] The first inclined portion and the arc portion are the top of the second channel.

[0022] Preferably, the fin member includes first fins arranged on the side wall of the second channel and linearly arrayed along the axial direction of the flat tube;

[0023] The lengths formed by the ends of multiple first fins to the side wall of the second channel decrease in the direction from the EGR cooler inlet pipe to the EGR valve seat water outlet passage;

[0024] There is an obtuse angle between the first fin and the side wall of the second channel, and this obtuse angle faces the water outlet channel of the EGR valve seat;

[0025] The first fin is arranged obliquely with respect to the horizontal plane and has an obtuse angle with respect to the horizontal plane, and this obtuse angle faces the water outlet channel of the EGR valve seat.

[0026] Preferably, the fin member includes a third fin disposed at the bottom of the second channel, and the end of the first fin extends to the side wall of the third fin;

[0027] And the side wall contour of the first fin is consistent with the side wall contour of the second channel.

[0028] Preferably, there is a part where the first fin and the side wall of the second channel do not contact at one end to form a gap groove;

[0029] Curved air guiding members are fixedly arranged on the side wall of the second channel and are linearly arrayed along the vertical direction within the gap groove;

[0030] The curved air guiding member is composed of two arc-shaped members with opposite inner arc tops, and is arranged obliquely. The outer side surface of the arc-shaped member at the lower position in the horizontal plane faces the water outlet channel of the EGR valve seat, and the end of the inner arc surface of the arc-shaped member at the higher position in the horizontal plane faces upward.

[0031] Preferably, a plurality of round holes linearly arrayed along the axial direction of the flat tube are opened in the second inclined portion, and hollow metal ball members are fixedly installed in the round holes. The metal ball members are semi-circular structures, and the horizontal plane of the semi-circular structure is flush with the outside of the round hole;

[0032] An elastic metal sheet is fixedly installed on the horizontal plane. The elastic metal sheet is arranged obliquely and is located between two first fins, and is used to make the plate surface receive the wind guided by the first fin. At the same time, the air outlet direction of the curved air guiding member also faces the end of the elastic metal sheet.

[0033] Preferably, the fin member includes second fins arranged on the side wall of the first channel and linearly arrayed along the axial direction of the flat tube.

[0034] In the above technical solution, an internal water channel integrating an EGR valve and a cooler provided by the present invention has the following beneficial effects: Through the design of the flat tube, the liquid flowing in the flat tube can separate the bubbles and then discharge them, thereby ensuring the cooling of the EGR valve. Description of the Drawings

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0036] Figure 1 A schematic diagram of the structure of the main body provided by an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure of the body and the flat tube provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of a flat tube provided in an embodiment of the present invention;

[0039] Figure 4 The embodiment of the present invention provides Figure 4 Schematic diagram of the plane structure;

[0040] Figure 5 The embodiment of the present invention provides Figure 5 A schematic diagram of the structure on the upper side;

[0041] Figure 6 A schematic structural diagram of a vertical portion and an arc-shaped groove provided in an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Main body; 1-1. EGR cooler water inlet pipe; 1-2. EGR cooler water outlet pipe; 1-3. EGR cooler internal water side channel; 1-3-1. First channel; 1-3-2. Second channel; 1-4. EGR cooler internal air side channel;

[0044] 2. EGR valve seat; 2-1. EGR valve seat water inlet; 2-2. EGR valve seat internal water channel; 2-3. EGR valve seat water outlet;

[0045] 3. Flat tube; 3-1. First fin; 3-1-1. Gap groove; 3-2. Special-shaped plate; 3-2-1. Vertical portion; 3-2-1-1. Arc groove; 3-2-2. First inclined portion; 3-2-3. Arc portion; 3-2-4. Second inclined portion; 3-3. Concave groove; 3-4. Second fin; 3-5. Third fin; 3-6. Curved air guide;

[0046] 4. Metal ball parts; 4-1. Elastic metal sheets. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] As shown in Figures 1-6 the figure, an internal water channel integrating an EGR valve and a cooler includes a body 1, an EGR cooler water inlet pipe 1-1 is fixedly installed at one end, and an EGR valve seat 2 is fixedly installed at the other end. An EGR valve seat water outlet channel 2-3 is provided on the EGR valve seat 2. It is characterized in that not less than six flat tubes 3 are fixedly installed in the body 1, and fin members are fixedly arranged on the outer wall of the flat tubes 3 at equidistant intervals;

[0049] The ends of the fin members between two adjacent flat tubes 3 are in contact with each other, so an internal gas side channel 1-4 of the EGR cooler is formed between two adjacent fin members of the same flat tube 3;

[0050] The EGR valve seat 2 includes an air inlet, and an air outlet is provided on the EGR cooler water inlet pipe 1-1, and the air inlet, the air outlet and the internal gas side channel 1-4 of the EGR cooler are communicated;

[0051] The inside of the flat tube 3 is an internal water side channel 1-3 of the EGR cooler. One end of the internal water side channel 1-3 of the EGR cooler is communicated with the EGR cooler water inlet pipe 1-1, and the other end is communicated with the EGR valve seat water outlet channel 2-3.

[0052] Specifically, the cooling gas enters through the air inlet, then flows in the internal gas side channel 1-4 of the EGR cooler, and then is discharged through the air outlet. The cooling gas can be the natural gas poured in during the driving process, or the air is generated by adding equipment such as a blower.

[0053] When the air flow quickly passes through the internal gas side channel 1-4 of the EGR cooler, the liquid flowing inside the flat tube 3 is quickly cooled down.

[0054] Furthermore, the number of the flat tubes 3 in the above embodiment is not less than six and is arranged vertically. During the rapid entry of the liquid, the air bubbles will float up. Therefore, the number of air bubbles in the upper flat tubes 3 is the largest, and the number in the lower flat tubes 3 is the smallest or there are no air bubbles, so as to ensure the cooling effect of the lower flat tubes 3, that is, to optimize the cooling of the body 1.

[0055] Secondly, the above-mentioned flat tube 3 is a cold tube, that is, it is made of aluminum alloy or stainless steel.

[0056] In the above technology, through the design of the flat tube 3, the liquid flowing in the flat tube 3 can separate the air bubbles and then discharge them, so as to ensure the cooling of the EGR valve.

[0057] As a further embodiment provided by the present invention, in combination with Figure 2As shown, an EGR cooler outlet water pipe 1-2 is fixedly installed inside the body 1. The EGR cooler outlet water pipe 1-2 is used to connect the ends of multiple flat pipes 3 and communicate with the EGR valve seat water outlet channel 2-3.

[0058] Furthermore, on both sides of the flat pipe 3, there are special-shaped plate members 3-2 that are recessed inward, and a recessed groove 3-3 is formed at the recessed part.

[0059] The two special-shaped plate members 3-2 include vertical parts 3-2-1, and the two vertical parts 3-2-1 are in contact.

[0060] The special-shaped plate member 3-2 divides the internal water side channel 1-3 of the EGR cooler into a first channel 1-3-1 and a second channel 1-3-2, and the volume of the second channel 1-3-2 is twice the volume of the first channel 1-3-1.

[0061] The second channel 1-3-2 is communicated with the EGR cooler outlet water pipe 1-2.

[0062] The first channel 1-3-1 is communicated with the EGR valve seat water inlet channel 2-1 opened on the EGR valve seat 2, and is connected in parallel through the EGR valve seat internal water channel 2-2 opened on the EGR valve seat 2 to the liquid outlet port of the EGR valve seat water outlet channel 2-3.

[0063] Specifically, the EGR valve seat internal water channel 2-2 in the above embodiment is a spiral structure, so the entering liquid will rotate one week and finally discharge water at a high position, taking out the bubbles in the water jacket to avoid affecting the cooling of the EGR valve.

[0064] Secondly, if there are bubbles in the liquid entering the flat pipe 3 in the embodiment, during the liquid flow process, the bubbles float up, so as to enter the first channel 1-3-1 from the second channel 1-3-2. The second channel 1-3-2 is a normal circulating pipeline, and the first channel 1-3-1 will enter the EGR valve seat internal water channel 2-2 for bubble discharge operation.

[0065] As a further embodiment provided by the present invention, in combination with Figure 6 As shown, arc-shaped grooves 3-2-1-1 are opened on the adjacent surfaces of the two vertical parts 3-2-1, and the two arc-shaped grooves 3-2-1-1 form an overflow channel, and the cross-section of the overflow channel is a rounded rectangle.

[0066] Specifically, since the volume of the second channel 1-3-2 is twice that of the first channel 1-3-1, the flow rate of the first channel 1-3-1 will be greater than that of the second channel 1-3-2. Therefore, there will be a flow rate difference between the second channel 1-3-2 and the first channel 1-3-1. Under the flow rate difference, the bubbles in the liquid in the second channel 1-3-2 will enter the first channel 1-3-1 through the arc-shaped groove 3-2-1-1, that is, the bubbles in the liquid passing through the flat tube 3 will be gathered in the first channel 1-3-1 and discharged into the internal water channel 2-2 of the EGR valve seat in a concentrated manner.

[0067] The above design can ensure that the bubbles in the liquid in the second channel 1-3-2 are cleared, more precisely, the bubbles in the liquid reaching the water outlet channel 2-3 of the EGR valve seat are cleared.

[0068] As the optimal embodiment further provided by the present invention, in combination with Figure 4 As shown, the special-shaped plate member 3-2 includes a first inclined portion 3-2-2, an arc portion 3-2-3, and a second inclined portion 3-2-4, wherein:

[0069] The arc portion 3-2-3 is connected to the vertical portion 3-2-1;

[0070] The space between the two arc portions 3-2-3 is a tower-shaped structure;

[0071] The space between the two first inclined portions 3-2-2 is funnel-shaped, and the narrow opening of the funnel shape is communicated with the space of the tower-shaped structure;

[0072] The second inclined portion 3-2-4 is the bottom of the first channel 1-3-1, and the low position in the horizontal direction is connected to the side wall of the arc portion 3-2-3;

[0073] The first inclined portion 3-2-2 and the arc portion 3-2-3 are the top of the second channel 1-3-2.

[0074] Specifically, the bubbles in the liquid in the second channel 1-3-2 in the embodiment will gather upward, then enter the space of the tower-shaped structure along the first inclined portion 3-2-2 and accumulate there, waiting to be sucked into the first channel 1-3-1.

[0075] As another embodiment further provided by the present invention, in combination with Figure 4 and 5 As shown, the fin member includes a first fin 3-1 disposed on the side wall of the second channel 1-3-2 and linearly arrayed along the axial direction of the flat tube 3;

[0076] The lengths formed by the ends of the multiple first fins 3-1 to the side wall of the second channel 1-3-2 decrease from the EGR cooler inlet pipe 1-1 to the direction of the EGR valve seat water outlet channel 2-3;

[0077] There is an obtuse angle between the first fin 3-1 and the side wall of the second channel 1-3-2, and this obtuse angle faces the water outlet channel 2-3 of the EGR valve seat;

[0078] The first fin 3-1 is inclined with respect to the horizontal plane and has an obtuse angle with respect to the horizontal plane, and this obtuse angle faces the water outlet channel 2-3 of the EGR valve seat.

[0079] Specifically, in the embodiment, the cooling air is blown in from one side of the water outlet channel 2-3 of the EGR valve seat. Because the multiple first fins 3-1 decrease, all the multiple first fins 3-1 can receive the cooling air, and in the upward direction, that is, towards the first channel 1-3-1 side. At this time, under the high-speed flowing air current, the air current speed at the concave groove 3-3 is less than the air current speed of the guided air current. Therefore, a circulating flow will be formed at the concave groove 3-3, so that the air current accumulated in the concave groove 3-3 is sucked away. And the concave groove 3-3 is formed by the special-shaped plate member 3-2, so as to ensure the heat dissipation on the adjacent side of the first channel 1-3-1 and the second channel 1-3-2. And because the liquid level of the liquid entering the first channel 1-3-1 through the gap between the two vertical parts 3-2-1 is thin, the liquid passing through here will be quickly cooled.

[0080] And during the flowing process, due to the problem of the flow velocity difference, the second channel 1-3-2 will enter the first channel 1-3-1. On the above basis, the second channel 1-3-2 will also be in a spiral flow. The spiral flow will displace the liquid in the liquid in the second channel 1-3-2 to the outside, so as to optimize the heat dissipation effect of the second channel 1-3-2.

[0081] It should be noted that the above fin member includes a third fin 3-5 arranged at the bottom of the second channel 1-3-2, and the end of the first fin 3-1 extends to the side wall of the third fin 3-5;

[0082] And the side wall contour of the first fin 3-1 is consistent with the side wall contour of the second channel 1-3-2.

[0083] As yet another embodiment further provided by the present invention, in combination with Figure 4 As shown, there is a part where the first fin 3-1 and the side wall of the second channel 1-3-2 do not contact at one end to form a gap groove 3-1-1;

[0084] The side wall of the second channel 1-3-2 is fixedly provided with curved air guiding members 3-6 located in the gap groove 3-1-1 and linearly arranged in an array along the vertical direction;

[0085] The typical air guide 3-6 is composed of two arc-shaped parts with opposite inner arc tops and is arranged obliquely. The outer side of the arc-shaped part at the lower position of the horizontal plane faces the water outlet channel 2-3 of the EGR valve seat, and the end of the inner arc surface of the arc-shaped part at the higher position of the horizontal plane faces upward.

[0086] Specifically, after the airflow in the above embodiment is intercepted by the first fin 3-1, some airflow will directly pass through the gap groove 3-1-1. Since the space of the gap groove 3-1-1 is relatively small and the flow rate is relatively fast, and under the guidance of the typical air guide 3-6, the airflow passing through the gap groove 3-1-1 is diverted upward, that is, introduced to the sunken groove 3-3.

[0087] As another embodiment further provided by the present invention, in combination with Figure 4 As shown, a plurality of round holes linearly arranged along the axis of the flat tube 3 are opened in the second inclined part 3-2-4, and a hollow metal ball part 4 is fixedly installed in the round holes. The metal ball part 4 is of a semi-circular structure, and the horizontal plane of the semi-circular structure is flush with the outside of the round hole;

[0088] An elastic metal sheet 4-1 is fixedly installed on the horizontal plane. The elastic metal sheet 4-1 is arranged obliquely and is located between the two first fins 3-1 and is used to make the plate surface receive the wind guided by the first fin 3-1. At the same time, the air outlet direction of the typical air guide 3-6 also faces the end of the elastic metal sheet 4-1.

[0089] Specifically, the air guiding of the typical air guide 3-6 and the first fin 3-1 in the embodiment will cause the airflow to directly impact the side wall and the end of the first fin 3-1, thereby causing the elastic metal sheet 4-1 to vibrate at a predetermined frequency. Because the elastic metal sheet 4-1 is connected to the metal ball part 4 and the metal ball part 4 is of a hollow structure, when the elastic metal sheet 4-1 vibrates, it will be transmitted to the metal ball part 4, thereby causing the special-shaped plate part 3-2 to vibrate at the same frequency. Under this vibration effect, the bubbles adhering to the side wall of the special-shaped plate part 3-2 will be avoided, so that the bubbles will surge upward into the first channel 1-3-1 under this vibration.

[0090] As another embodiment further provided by the present invention, in combination with Figure 4 As shown, the fin part includes second fins 3-4 arranged on the side wall of the first channel 1-3-1 and linearly arranged along the axis of the flat tube 3.

[0091] Specifically, the second fin 3-4 can dissipate heat from the liquid in the first channel 1-3-1.

[0092] Only certain exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An internal water channel of an integrated EGR valve and cooler, comprising a body (1), one end of which is fixedly mounted with an EGR cooler water inlet pipe (1-1), and the other end of which is fixedly mounted with an EGR valve seat (2), the EGR valve seat (2) being provided with an EGR valve seat water outlet channel (2-3), characterized in that: No less than six flat tubes (3) are fixedly installed in the body (1), and fins distributed at equal intervals are fixedly arranged on the outer walls of the flat tubes (3); The ends of the fin members between two adjacent flat tubes (3) are in contact with each other, so that an internal gas side channel (1-4) of the EGR cooler is formed between two adjacent fin members of the same flat tube (3); The EGR valve seat (2) includes an air inlet, the EGR cooler water inlet pipe (1-1) is provided with an air outlet, and the air inlet and the air outlet are in communication with an internal air side channel (1-4) of the EGR cooler; The interior of the flat tube (3) is an internal water side channel (1-3) of the EGR cooler, one end of the internal water side channel (1-3) of the EGR cooler is connected to the EGR cooler water inlet pipe (1-1), and the other end is connected to the EGR valve seat water outlet (2-3).

2. The internal water channel of the integrated EGR valve and cooler according to claim 1, characterized in that: An EGR cooler water outlet pipe (1-2) is fixedly installed in the body (1), and the EGR cooler water outlet pipe (1-2) is used to connect the ends of the plurality of flat tubes (3) to the EGR valve seat water outlet channel (2-3).

3. The internal water channel of the integrated EGR valve and cooler according to claim 2, characterized in that: The flat tube (3) has an inwardly concave special-shaped plate (3-2) on both sides, and a concave groove (3-3) is formed at the concave position; The two special-shaped plates (3-2) include a vertical portion (3-2-1), and the two vertical portions (3-2-1) are in close contact with each other; The special-shaped plate (3-2) divides the water-side channel (1-3) inside the EGR cooler into a first channel (1-3-1) and a second channel (1-3-2), and the volume of the second channel (1-3-2) is twice the volume of the first channel (1-3-1); The second channel (1-3-2) is in communication with the EGR cooler water outlet pipe (1-2); The first channel (1-3-1) is connected to an EGR valve seat water inlet channel (2-1) opened on the EGR valve seat (2), and is connected in parallel to a liquid outlet port of the EGR valve seat water outlet channel (2-3) through an EGR valve seat internal water channel (2-2) opened on the EGR valve seat (2).

4. The internal water channel of the integrated EGR valve and cooler according to claim 3, characterized in that: The adjacent surfaces of the two vertical parts (3-2-1) are provided with arc-shaped grooves (3-2-1-1), and the two arc-shaped grooves (3-2-1-1) form an overflow channel, and the cross section of the overflow channel is a rounded rectangle.

5. The internal water channel of the integrated EGR valve and cooler according to claim 3, characterized in that: The special-shaped plate (3-2) comprises a first inclined portion (3-2-2), an arc-shaped portion (3-2-3) and a second inclined portion (3-2-4), wherein: The arc-shaped portion (3-2-3) is connected to the vertical portion (3-2-1); The space between the two arc-shaped parts (3-2-3) is a tower-shaped structure; The space between the two first inclined parts (3-2-2) is funnel-shaped, and the narrow opening of the funnel is connected to the space of the tower structure; The second inclined portion (3-2-4) is the bottom of the first channel (1-3-1), and the lower position in the horizontal direction is connected to the side wall of the arc-shaped portion (3-2-3); The first inclined portion (3-2-2) and the arc-shaped portion (3-2-3) are the top of the second channel (1-3-2).

6. The internal water channel of the integrated EGR valve and cooler according to claim 1, characterized in that: The fin member comprises first fins (3-1) which are arranged on the side wall of the second channel (1-3-2) and are distributed in a linear array along the axial direction of the flat tube (3); The length from the ends of the plurality of first fins (3-1) to the side wall of the second channel (1-3-2) decreases from the EGR cooler water inlet pipe (1-1) toward the EGR valve seat water outlet (2-3); An obtuse angle exists between the first fin (3-1) and the side wall of the second channel (1-3-2), and the obtuse angle faces the EGR valve seat water outlet (2-3); The first fin (3-1) is arranged obliquely with respect to a horizontal plane and has an obtuse angle with respect to the horizontal plane, and the obtuse angle faces the EGR valve seat water outlet (2-3).

7. The internal water channel of the integrated EGR valve and cooler according to claim 6, characterized in that: The fin member comprises a third fin (3-5) arranged at the bottom of the second channel (1-3-2), and the end of the first fin (3-1) extends to the side wall of the third fin (3-5); Furthermore, the side wall profile of the first fin (3-1) is consistent with the side wall profile of the second channel (1-3-2).

8. The internal water channel of the integrated EGR valve and cooler according to claim 6, characterized in that: The first fin (3-1) and the side wall of the second channel (1-3-2) have a non-contacting portion at one end to form a gap groove (3-1-1); The side wall of the second channel (1-3-2) is fixedly provided with curved air guide members (3-6) located in the gap groove (3-1-1) and distributed in a linear array along the vertical direction; The curved air guide member (3-6) is composed of two arc-shaped members with inner arc tops facing opposite directions and arranged obliquely, and the outer side surface of an arc-shaped member located at a low horizontal position faces the EGR valve seat water outlet (2-3), and the end of the inner arc surface of an arc-shaped member located at a high horizontal position faces upward.

9. The internal water channel of the integrated EGR valve and cooler according to claim 5, characterized in that: The second inclined portion (3-2-4) is provided with a plurality of circular holes distributed in a linear array along the axial direction of the flat tube (3), and a hollow metal ball (4) is fixedly installed in the circular hole. The metal ball (4) is a semicircular structure, and the horizontal surface of the semicircular structure is aligned with the outer side of the circular hole; An elastic metal sheet (4-1) is fixedly mounted on the horizontal plane. The elastic metal sheet (4-1) is arranged obliquely and is located between the two first fins (3-1). The elastic metal sheet (4-1) is used to enable the plate surface to receive the wind guided by the first fins (3-1). At the same time, the wind outlet direction of the curved air guide member (3-6) is also toward the end of the elastic metal sheet (4-1).

10. The internal water channel of the integrated EGR valve and cooler according to claim 1, characterized in that: The fin member comprises second fins (3-4) which are arranged on the side wall of the first channel (1-3-1) and are distributed in a linear array along the axial direction of the flat tube (3).

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