cooler

Abstract

The present invention relates to the field of fluid cooling technology, and provides a cooler comprising a shell and a heat exchange tube. The shell is provided with a first opening and a second opening; the heat exchange tube is passed through the shell, and the heat exchange tube comprises a main tube body and a sub-tube body. The main tube body is connected to the first opening and the second opening, and a cooling cavity is formed between the outer peripheral wall of the main tube body and the inner peripheral wall of the shell. The sub-tube body is inserted into the main tube body and the axis of the sub-tube body is arranged at an angle to the axis of the main tube body. The head and tail ports of the sub-tube body are formed on the side wall of the main tube body and are connected to the cooling cavity. The refrigerant further contacts the exhaust gas in the main tube body through the peripheral side wall of the sub-tube body, thereby increasing the contact area and improving the heat exchange efficiency. Furthermore, the sub-tube body forms an obstacle inside the main tube body. When the exhaust gas moves along the axial direction of the main tube body in the main tube body, it hits the outer peripheral wall of the sub-tube body to form turbulence, which can reduce the accumulation of sediment in the heat exchange tube.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid cooling, and in particular to a cooler. Background Art

[0002] Exhaust Gas Recirculation (EGR) technology separates a portion of the exhaust gas from an internal combustion engine and directs it back into the intake air for re-combustion. This technology effectively reduces the engine's original NOx emissions. It is low-cost, easy to use, and requires minimal modification to the original engine, making it a key technology for meeting diesel engine emission regulations. The core component of EGR technology is the EGR cooler, which lowers the intake temperature of the recirculated exhaust gas and increases its density.

[0003] Carbon deposits are a phenomenon in which hydrocarbons and soot in the circulating exhaust gas are deposited on the metal surfaces of the heat exchanger's fins due to factors such as thermophoresis and condensation diffusion. Studies have shown that carbon deposits in EGR coolers can reduce heat transfer efficiency by as much as 20% to 30%, increase air resistance, and affect engine performance. In severe cases, they can even block the cooler's air-side flow channels.

[0004] Therefore, a cooler is urgently needed to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a cooler that can improve heat exchange efficiency and reduce sediment accumulation in heat exchange tubes.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Cooler, including:

[0008] A housing, wherein the housing is provided with a first opening and a second opening;

[0009] The heat exchange tube is passed through the shell, and the heat exchange tube includes a mother tube body and a daughter tube body. The mother tube body is connected to the first opening and the second opening. A cooling cavity is formed between the outer peripheral wall of the mother tube body and the inner peripheral wall of the shell. The daughter tube body is inserted into the mother tube body and the axis of the daughter tube body is arranged at an angle to the axis of the mother tube body. The head and tail ports of the daughter tube body are formed on the side wall of the mother tube body and are connected to the cooling cavity.

[0010] As a preferred technical solution of the above-mentioned cooler, it also includes an air intake connector and an exhaust connector, the above-mentioned air intake connector is connected to the above-mentioned first opening, the above-mentioned exhaust connector is connected to the above-mentioned second opening, the above-mentioned mother pipe body is connected to the above-mentioned air intake connector and the above-mentioned exhaust connector, and the above-mentioned shell is provided with a refrigerant inlet and a refrigerant outlet, and the above-mentioned refrigerant inlet and the above-mentioned refrigerant outlet are both connected to the above-mentioned cooling chamber.

[0011] As a preferred technical solution of the above-mentioned cooler, it also includes a first baffle and a second baffle. The above-mentioned first baffle is arranged at the above-mentioned first opening, and the above-mentioned mother tube body passes through the above-mentioned first baffle and is connected with the above-mentioned air intake joint. The above-mentioned second baffle is arranged at the above-mentioned second opening, and the above-mentioned mother tube body passes through the above-mentioned second baffle and is connected with the above-mentioned exhaust joint. The above-mentioned first baffle, the above-mentioned second baffle, the inner circumferential wall of the above-mentioned shell, the outer circumferential wall of the above-mentioned mother tube body and the inner circumferential wall of the above-mentioned sub-tube body form the above-mentioned cooling cavity.

[0012] As a preferred technical solution of the above-mentioned cooler, the above-mentioned refrigerant inlet is adjacent to the above-mentioned air inlet joint, and the above-mentioned refrigerant outlet is adjacent to the above-mentioned exhaust joint.

[0013] As a preferred technical solution for the above-mentioned cooler, the first and tail ports of the above-mentioned sub-tube body are formed on two radially opposite sides of the above-mentioned mother tube body, the above-mentioned refrigerant inlet is located on the same side as one of the above-mentioned ports, and the above-mentioned refrigerant outlet is located on the same side as the other above-mentioned port.

[0014] As a preferred technical solution of the above-mentioned cooler, a plurality of the above-mentioned heat exchange tubes are provided and connected in parallel between the above-mentioned first opening and the above-mentioned second opening.

[0015] As a preferred technical solution of the above-mentioned cooler, the above-mentioned mother tube body is inserted with a plurality of the above-mentioned child tube bodies, and the plurality of the above-mentioned child tube bodies are staggeredly distributed along the axis of the above-mentioned mother tube body.

[0016] As a preferred technical solution of the cooler, the sub-tubes of two adjacent heat exchange tubes are arranged in a staggered manner.

[0017] As a preferred technical solution of the above-mentioned cooler, the above-mentioned heat exchange tubes are flat tubes.

[0018] As a preferred technical solution of the above-mentioned cooler, the above-mentioned sub-tube body is corrugated.

[0019] Beneficial effects of the present invention:

[0020] A cooler is provided, comprising a shell and a heat exchange tube. The shell has a first opening and a second opening; the heat exchange tube is disposed within the shell and comprises a main tube body and a sub-tube body. The main tube body communicates with the first opening and the second opening, forming a cooling cavity between the outer circumferential wall of the main tube body and the inner circumferential wall of the shell. The sub-tube body is inserted into the main tube body, with the axis of the sub-tube body being arranged at an angle to the axis of the main tube body. The first and second ports of the sub-tube body are formed on the side wall of the main tube body and communicate with the cooling cavity.

[0021] Specifically, a housing is formed within the shell. A first opening and a second opening of the shell allow the housing to communicate with the external environment of the shell. A heat exchange tube is installed within the housing, and exhaust gas flows through the heat exchange tube. A cooling cavity is formed between the heat exchange tube and the shell, and a refrigerant for cooling the exhaust gas flows through the cooling cavity. The heat exchange tube includes a main tube body and a sub-tube body. The main tube body has a larger volume than the sub-tube body, and the exhaust gas flows within the main tube body. The sub-tube body is inserted into the main tube body and arranged at an angle with the main tube body. The front and rear ends of the sub-tube body form ports on the side walls of the main tube body, allowing the refrigerant to flow within the sub-tube body. The sub-tube body further contacts the exhaust gas within the main tube body through the peripheral side walls of the sub-tube body, increasing the contact area and improving heat exchange efficiency. Furthermore, the sub-tube body forms an obstacle within the main tube body. When the exhaust gas moves axially within the main tube body, it impacts the outer peripheral wall of the sub-tube body, forming turbulence, disrupting the original flow boundary layer, and allowing the refrigerant to contact the central area of ​​the exhaust gas for heat exchange. Furthermore, the turbulent flow formed by the exhaust gas washes the outer peripheral wall of the sub-tube body and the inner peripheral wall of the main tube body, preventing the accumulation of sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0023] Figure 1 1 is a schematic structural diagram of a cooler provided by an embodiment of the present invention;

[0024] Figure 2 is a cross-sectional view of a cooler provided by an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional view of a heat exchange tube provided in another embodiment of the present invention;

[0026] Figure 4 It is a cross-sectional view of a heat exchange tube provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 10. Shell; 11. First opening; 12. Second opening; 13. Refrigerant inlet; 14. Refrigerant outlet; 15. Cooling chamber;

[0029] 20. Heat exchange tube; 21. Main tube body; 22. Sub-tube body;

[0030] 31. Air inlet connector; 32. Exhaust connector;

[0031] 41. First baffle; 42. Second baffle. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] like Figures 1 to 4As shown, the present invention provides a cooler, comprising a shell 10 and a heat exchange tube 20. The shell 10 is provided with a first opening 11 and a second opening 12; the heat exchange tube 20 is disposed within the shell 10 and comprises a main tube body 21 and a sub-tube body 22. The main tube body 21 communicates with the first opening 11 and the second opening 12, and a cooling cavity 15 is formed between the outer circumferential wall of the main tube body 21 and the inner circumferential wall of the shell 10. The sub-tube body 22 is inserted into the main tube body 21, with the axis of the sub-tube body 22 being arranged at an angle to the axis of the main tube body 21. The first and rear ports of the sub-tube body 22 are formed on the side wall of the main tube body 21 and communicate with the cooling cavity 15.

[0037] Specifically, a housing 10 defines an interior space. The housing 10 includes a first opening 11 and a second opening 12, allowing the space to communicate with the external environment of the housing 10. A heat exchange tube 20 is installed within the space, and exhaust gas flows through the heat exchange tube 20. A cooling chamber 15 is formed between the heat exchange tube 20 and the housing 10, and a refrigerant for cooling the exhaust gas flows through the cooling chamber 15. The heat exchange tube 20 includes a main tube body 21 and a sub-tube body 22. The main tube body 21 has a larger volume than the sub-tube body 22. Exhaust gas flows within the main tube body 21. The sub-tube body 22 is inserted into the main tube body 21 and arranged at an angle thereto. Ports are formed at the front and rear ends of the sub-tube body 22 on the sidewalls of the main tube body 21. Refrigerant can flow within the sub-tube body 22, and further contact with the exhaust gas within the main tube body 21 is achieved through the peripheral sidewalls of the sub-tube body 22, thereby increasing the contact area and improving heat exchange efficiency. Furthermore, the sub-tubes 22 form an obstruction within the main tube 21. As the exhaust gas moves axially within the main tube 21, it impacts the outer wall of the sub-tubes 22, creating turbulence that disrupts the original flow boundary layer and allows the refrigerant to engage with the center of the exhaust gas for heat exchange. Furthermore, the turbulent flow created by the exhaust gas washes over the outer walls of the sub-tubes 22 and the inner wall of the main tube 21, preventing the accumulation of sediment.

[0038] Optionally, the cooler also includes an air intake connector 31 and an exhaust connector 32, the air intake connector 31 is connected to the first opening 11, the exhaust connector 32 is connected to the second opening 12, the main tube body 21 connects the air intake connector 31 and the exhaust connector 32, and the shell 10 is provided with a refrigerant inlet 13 and a refrigerant outlet 14, and the refrigerant inlet 13 and the refrigerant outlet 14 are both connected to the cooling chamber 15.

[0039] In other embodiments, the diameter of the mother tube body 21 is smaller than the diameter of the air intake connector 31 and also smaller than the diameter of the exhaust connector 32. One end of the mother tube body 21 is inserted into the air intake connector 31, and the other end is inserted into the exhaust connector 32. An annular interface is formed at both ends. The inner circumferential wall of the mother tube body 21 forms a first flow channel, and the outer circumferential wall of the mother tube body 21 and the inner circumferential wall of the air intake connector 31, the inner circumferential wall of the shell 10, and the inner circumferential wall of the exhaust connector 32 form a second flow channel. The first flow channel is used to transport exhaust gas, and the second flow channel is used to transport refrigerant.

[0040] Optionally, the cooler also includes a first baffle 41 and a second baffle 42. The first baffle 41 is arranged at the first opening 11, and the main tube body 21 passes through the first baffle 41 and is connected to the air intake connector 31. The second baffle 42 is arranged at the second opening 12, and the main tube body 21 passes through the second baffle 42 and is connected to the exhaust connector 32. The first baffle 41, the second baffle 42, the inner circumferential wall of the shell 10, the outer circumferential wall of the main tube body 21 and the inner circumferential wall of the sub-tube body 22 form a cooling chamber 15.

[0041] Specifically, the first baffle 41 is placed in the shell 10, and the peripheral side of the first baffle 41 is sealed and fixed to one of the shell 10 and the air intake connector 31. A first through hole is opened in the middle of the first baffle 41, and one end of the mother tube body 21 is connected to the air intake connector 31 through the first through hole, and the mother tube body 21 and the first baffle 41 form a seal; the second baffle 42 is placed in the shell 10, and the peripheral side of the second baffle 42 is sealed and fixed to one of the shell 10 and the exhaust connector 32. A second through hole is opened in the middle of the second baffle 42, and the other end of the mother tube body 21 is fixed to the exhaust connector 32 through the second through hole, and the mother tube body 21 and the second baffle 42 form a seal. In this way, the air intake connector 31 and the exhaust connector 32 are isolated from the cooling chamber 15 by the first baffle 41 and the second baffle 42. The exhaust gas passes through the air intake connector 31, the main pipe body 21 and the exhaust connector 32 in sequence. The cooling chamber 15 is formed in the area between the air intake connector 31 and the exhaust connector 32. In this way, when the cooler is disassembled, it is disconnected from the circulation pipe at the air intake connector 31 and the exhaust connector 32, and no leakage of the refrigerant occurs.

[0042] Furthermore, the mother tube body 21 can be inserted into the first through hole, and the outer circumferential wall of the mother tube body 21 and the inner circumferential wall of the first through hole are sealed by interference fit, welding, glue injection, etc., or the mother tube body 21 and the first through hole are docked, that is, the axial end face of the mother tube body 21 and the axial end face of the first through hole are sealed.

[0043] Optionally, the refrigerant inlet 13 is adjacent to the air inlet joint 31, and the refrigerant outlet 14 is adjacent to the exhaust joint 32. Specifically, since the exhaust gas flows from the air inlet joint 31 to the exhaust joint 32, the temperature of the exhaust gas near the air inlet joint 31 is higher than the temperature of the exhaust gas near the exhaust joint 32. The refrigerant flows from the refrigerant inlet 13 to the refrigerant outlet 14. The refrigerant at the refrigerant inlet 13 does not undergo heat exchange with the exhaust gas, and its temperature is lower than the refrigerant temperature at the refrigerant outlet 14. Therefore, the refrigerant inlet 13 is arranged near the air inlet joint 31 and the refrigerant outlet 14 is arranged near the exhaust joint 32. The refrigerant at the lowest temperature can come into contact with the exhaust gas at the highest temperature, and the huge temperature difference can improve the heat exchange efficiency.

[0044] Optionally, the first and last ports of the sub-tube body 22 are formed on radially opposite sides of the main tube body 21, with the refrigerant inlet 13 located on the same side as one of the ports, and the refrigerant outlet 14 located on the same side as the other port. Specifically, the axes of the refrigerant inlet 13 and the refrigerant outlet 14 both intersect with the axis of the main tube body 21. When the refrigerant enters the cooling chamber 15 from the refrigerant inlet 13, it has a tendency to move along the axial direction of the main tube body 21, and also has a tendency to move along the radial direction of the main tube body 21. In this way, the refrigerant's tendency to move radially makes it easier for the refrigerant to enter the sub-tube body 22.

[0045] Optionally, multiple heat exchange tubes 20 are provided, connected in parallel between the first opening 11 and the second opening 12. This arrangement can increase the total diameter of the flow channel for exhaust gas circulation and increase the contact area between the exhaust gas and the cooling chamber 15. Even if one or more heat exchange tubes 20 become blocked, the flow of exhaust gas will not be affected.

[0046] Optionally, the main tube 21 is provided with a plurality of sub-tubes 22, which are staggered along the axis of the main tube 21. This can further increase the contact area between the exhaust gas and the refrigerant, and the staggered sub-tubes 22 can further generate exhaust gas vortices, destroying the original flow boundary layer and improving the cooling effect.

[0047] Optionally, the sub-tubes 22 of two adjacent heat exchange tubes 20 are staggered. Specifically, assume that, of the two adjacent heat exchange tubes 20, the sub-tube 22 of one heat exchange tube 20 is denoted as the first sub-tube 22, and its main tube 21 is denoted as the first main tube 21; and the sub-tube 22 of the other heat exchange tube 20 is denoted as the second sub-tube 22, and its main tube 21 is denoted as the second main tube 21. After passing through the first sub-tube 22, the refrigerant is sprayed onto the outer wall of the second main tube 21, rather than flowing directly along the second sub-tube 22. In this way, a cooling dead zone is avoided.

[0048] Optionally, the heat exchange tube 20 is a flat tube. That is, the cross section of the heat exchange tube 20 is an elliptical rectangle. This can increase the contact range between the exhaust gas and the refrigerant.

[0049] Because the exhaust gas has a relatively high temperature, the sub-tube 22 is heated and deformed by the exhaust gas. Generally, due to the principle of thermal expansion and contraction, the sub-tube 22 expands axially when heated, causing the main tube 21 to be squeezed by the sub-tube 22 and deform or crack. To this end, in this embodiment, the sub-tube 22 is corrugated. The corrugated structure can absorb some thermal deformation, thereby reducing cracks at the connection between the sub-tube 22 and the main tube 21.

[0050] In other embodiments, the sub-tube 22 is a straight tube or an inclined tube.

[0051] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Cooler, characterized in that, include: A housing (10), wherein the housing (10) is provided with a first opening (11) and a second opening (12); A heat exchange tube (20), the heat exchange tube (20) is passed through the shell (10), the heat exchange tube (20) comprises a main tube body (21) and a sub-tube body (22), the main tube body (21) is connected to the first opening (11) and the second opening (12), a cooling cavity (15) is formed between the outer peripheral wall of the main tube body (21) and the inner peripheral wall of the shell (10), the sub-tube body (22) is inserted into the main tube body (21) and the axis of the sub-tube body (22) is arranged at an angle to the axis of the main tube body (21), and the first and rear ports of the sub-tube body (22) are formed on the side wall of the main tube body (21) and are connected to the cooling cavity (15); The housing (10) is provided with a refrigerant inlet (13) and a refrigerant outlet (14), and both the refrigerant inlet (13) and the refrigerant outlet (14) are in communication with the cooling chamber (15); The first and last ports of the sub-tube body (22) are formed on two radially opposite sides of the main tube body (21), the refrigerant inlet (13) is located on the same side as one of the ports, and the refrigerant outlet (14) is located on the same side as the other port; The heat exchange tubes (20) are provided in plurality and connected in parallel between the first opening (11) and the second opening (12); the mother tube body (21) is provided with a plurality of the sub-tube bodies (22); along the axis of the mother tube body (21), the plurality of the sub-tube bodies (22) are staggeredly distributed; the sub-tube bodies (22) of two adjacent heat exchange tubes (20) are staggeredly distributed.

2. The cooler according to claim 1, characterized in that It also includes an air intake connector (31) and an air exhaust connector (32), wherein the air intake connector (31) is connected to the first opening (11), and the air exhaust connector (32) is connected to the second opening (12), and the mother pipe body (21) is in communication with the air intake connector (31) and the air exhaust connector (32).

3. The cooler according to claim 2, characterized in that The cooling chamber (15) is further comprised of a first baffle (41) and a second baffle (42), wherein the first baffle (41) is arranged at the first opening (11), the mother tube body (21) passes through the first baffle (41) and is in communication with the air inlet connector (31), and the second baffle (42) is arranged at the second opening (12), the mother tube body (21) passes through the second baffle (42) and is in communication with the air outlet connector (32), and the first baffle (41), the second baffle (42), the inner peripheral wall of the shell (10), the outer peripheral wall of the mother tube body (21), and the inner peripheral wall of the sub-tube body (22) form the cooling chamber (15).

4. The cooler according to claim 2, characterized in that The refrigerant inlet (13) is adjacent to the air inlet connector (31), and the refrigerant outlet (14) is adjacent to the air exhaust connector (32).

5. The cooler according to claim 1, characterized in that The heat exchange tube (20) is a flat tube.

6. The cooler according to claim 1, characterized in that The sub-tube body (22) is corrugated.

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