Heat exchanger cooling system for internal combustion engine

Abstract

A heat exchanger cooling system for an internal combustion engine includes a first radiator, a second radiator and a water-to-air intercooler; the first radiator water chamber at one end of the first radiator is a middle water chamber, and the first radiator water chamber at the other end is divided into a first water outlet chamber connected to a primary radiator core and a first water inlet chamber connected to a secondary radiator core; the water-to-air intercooler has a water inlet and a water outlet, and the first water outlet and the second water outlet are located on the air inlet side and the air outlet side respectively; the first water outlet chamber is connected to the water inlet through a first water pump, and the first water outlet is connected to the first water inlet chamber, and the primary radiator core and the secondary radiator core are both connected to the middle water chamber. In the embodiment of the present invention, the two radiator cores of the first radiator are connected in series through the middle water chamber, and the coolant on the air outlet side is introduced into the middle water chamber, which increases the average temperature difference, improves the heat dissipation performance without increasing or even reducing the heat dissipation area, and can reduce the external dimensions of the cooling system while increasing the limit use temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of internal combustion engine cooling, and in particular relates to a heat exchanger cooling system for an internal combustion engine. Background Art

[0002] The cooling system of an internal combustion engine has a great influence on the reliability of the internal combustion engine. If the temperature of the high-temperature coolant flowing through the cylinder of the internal combustion engine is too high, the internal combustion engine is prone to cylinder scuffing; if the temperature of the low-temperature coolant flowing through the water-to-air intercooler is too high, the intake temperature of the internal combustion engine will be too high, and the internal combustion engine is still very prone to cylinder explosion. Therefore, if the heat dissipation effect of any one of the heat exchanger and the water-to-air intercooler in the cooling system is not good, that is, if the temperature of any one of the high-temperature coolant and the low-temperature coolant is too high, the internal combustion engine is easily damaged. In addition, due to the poor heat dissipation effect, the coolant temperature is too high. In order to avoid damage to the internal combustion engine, the power of the internal combustion engine must be reduced, which will significantly limit the use effect of the equipment.

[0003] The cooling system of the internal combustion engine generally adopts a high and low temperature heat dissipation system, such as Figure 1As shown, there are high-temperature heat exchangers, low-temperature heat exchangers and water-to-air intercoolers. The high-temperature coolant in the high-temperature heat exchanger dissipates heat for the internal combustion engine. The low-temperature coolant in the low-temperature heat exchanger flows into the water-to-air intercooler to dissipate heat for the intake air after turbocharging. The high-temperature heat exchanger and the low-temperature heat exchanger are arranged side by side, and the intake air first passes through the low-temperature heat exchanger and then passes through the high-temperature heat exchanger. The heat dissipation of the heat exchanger in the high-low temperature heat dissipation system = heat dissipation area × heat transfer coefficient × average temperature difference. Since the refrigerant in the high-low temperature heat dissipation system is natural air and the heat medium is antifreeze, the average temperature difference is subject to the ambient temperature and the parameters of the internal combustion engine, and the heat transfer coefficient is subject to the air volume, flow rate and heat exchanger structure. Therefore, in traditional designs, the average temperature difference is generally treated as a constant term, and the heat transfer coefficient is also generally treated as a constant term. In order to increase the heat dissipation, the method of increasing the heat transfer area is generally adopted. However, the average temperature difference of the low-temperature heat exchanger is small, and a larger heat dissipation area is required to meet the heat dissipation requirements. This is the reason why the front area of ​​the cooling system is large. In addition, the extreme ambient temperature has a great influence on the reliability of the internal combustion engine. The higher the ambient temperature, the smaller the temperature difference between the ambient temperature and the intake air temperature, the more difficult the heat exchange is, and the greater the difficulty of heat dissipation. More specifically, the inlet air temperature of the heat exchanger increases with the increase of the ambient temperature, and the temperature of the coolant after cooling in the low-temperature heat exchanger increases. Since the intake air needs to be cooled by the coolant after cooling in the low-temperature heat exchanger, and the intake air temperature after turbocharging also increases with the increase of the ambient temperature, the intake air temperature is still high after the coolant enters the water-to-air intercooler to dissipate the heat of the intake air, thereby reducing the temperature difference between the ambient temperature and the intake air temperature. According to the current method of increasing the heat dissipation, the heat dissipation area of ​​the low-temperature heat exchanger can only be increased, thereby reducing the coolant temperature entering the water-to-air intercooler, thereby reducing the intake air temperature, but this will further increase the volume of the cooling system. It is very difficult for the traditional structural radiator currently used to achieve the goal of increasing the extreme ambient temperature and reducing the radiator's external dimensions. Summary of the invention

[0004] In view of the deficiencies existing in the related art, the present invention provides a heat exchanger cooling system for an internal combustion engine to solve the problems of weak heat dissipation performance, low extreme operating ambient temperature and large external dimensions existing in the traditional structural cooling system.

[0005] The present invention provides a heat exchanger cooling system for an internal combustion engine, comprising a first radiator, a second radiator and a water-to-air intercooler;

[0006] The first radiator and the second radiator are sequentially arranged along the air inlet direction, the first radiator comprising a first radiator core and two first radiator water chambers arranged at both ends of the first radiator core;

[0007] The first radiator core is divided into a primary radiator core and a secondary radiator core in sequence along the air inlet direction, the first radiator water chamber at one end is a middle water chamber, and the first radiator water chamber at the other end is divided into a first water outlet chamber connected to the primary radiator core and a first water inlet chamber connected to the secondary radiator core;

[0008] The second radiator comprises a second radiator core and two second radiator water chambers arranged at two ends of the second radiator core;

[0009] The water-to-air intercooler has a water inlet and a water outlet, the water outlet includes a first water outlet and a second water outlet, the two sides of the water-to-air intercooler are respectively an air inlet side and an air outlet side, the first water outlet and the second water outlet are respectively located at the air inlet side and the air outlet side;

[0010] The first water outlet chamber is connected to the water inlet through the first water pump, the first water outlet is connected to the first water inlet chamber, and the first-stage radiator core and the second-stage radiator core are both connected to the middle water chamber;

[0011] The second radiator water chamber at one end is connected to the coolant inlet of the internal combustion engine through the second water pump, and the coolant outlet of the internal combustion engine is connected to the second radiator water chamber at the other end.

[0012] In some embodiments, the water-to-air intercooler has a first intercooler water chamber and a second intercooler water chamber at both ends, the water inlet is arranged in the first intercooler water chamber, and the first water outlet and the second water outlet are arranged in the second intercooler water chamber.

[0013] In some of the embodiments, the water inlet is located on the air outlet side.

[0014] In some of the embodiments, the second intercooler water chamber is divided into two compartments by a partition, and the first water outlet and the second water outlet are respectively arranged on the two compartments.

[0015] In some of the embodiments, the water-to-air intercooler has a first intercooler water chamber, a second intercooler water chamber and a third intercooler water chamber. The first intercooler water chamber and the third intercooler water chamber are respectively located on the air outlet side and the air inlet side, and are both located at the same end of the water-to-air intercooler. The second intercooler water chamber is located at the other end of the water-to-air intercooler. The water inlet is arranged in the first intercooler water chamber, the first water outlet is arranged in the third intercooler water chamber, and the second water outlet is arranged in the second intercooler water chamber.

[0016] In some embodiments, the first radiator and the second radiator are arranged side by side, the width direction of the first radiator and the second radiator is the longitudinal direction, the two second radiator water chambers respectively have a second liquid outlet and a second liquid inlet, the second liquid inlet is connected to the coolant outlet of the internal combustion engine, the second liquid outlet is connected to the coolant inlet of the internal combustion engine through the second water pump, and the second liquid outlet and the second liquid inlet are respectively located on both sides in the longitudinal direction;

[0017] The first water inlet chamber, the first water outlet chamber and the middle water chamber respectively have a first liquid inlet, a first liquid outlet and an intermediate liquid inlet, the first liquid outlet and the second liquid outlet are located at the same end and on the side away from the second liquid outlet in the longitudinal direction, the first liquid inlet is located between the first liquid outlet and the second liquid outlet, and the intermediate liquid inlet is located on the side away from the second liquid inlet in the longitudinal direction.

[0018] Based on the above technical scheme, the first radiator in the embodiment of the present invention has two radiator cores, and the two radiator cores are connected in series through the middle water chamber, and the coolant on the outlet side of the water-to-air intercooler is introduced into the middle water chamber, thereby improving the average temperature difference of the first radiator, and improving the heat dissipation performance of the cooling system without increasing the heat dissipation area or even reducing the heat dissipation area. The cooling system can ensure the normal operation of the internal combustion engine under higher extreme use environments, and can reduce the external dimensions of the cooling system under increased extreme use temperatures, thereby solving the problems of weak heat dissipation performance, low extreme use environment temperature, and large external dimensions in traditional structural cooling systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a principle block diagram of a high and low temperature heat dissipation system in the prior art;

[0021] Figure 2 It is a principle block diagram of Embodiment 1 of the heat exchanger cooling system for an internal combustion engine of the present invention;

[0022] Figure 3 It is a principle block diagram of the second embodiment of the heat exchanger cooling system for an internal combustion engine of the present invention;

[0023] Figure 4 This is a principle block diagram of Embodiment 3 of the heat exchanger cooling system for an internal combustion engine of the present invention;

[0024] Figure 5 It is a principle block diagram of a fourth embodiment of a heat exchanger cooling system for an internal combustion engine of the present invention;

[0025] In the figure:

[0026] 1. First radiator; 1A. First radiator core; 1B. First radiator water chamber; 11. Primary radiator core; 12. Secondary radiator core; 13. Middle water chamber; 14. First water inlet chamber; 15. First water outlet chamber; 101. First liquid inlet; 102. First liquid outlet; 103. Middle liquid inlet;

[0027] 2. Second radiator; 2A. Second radiator core; 2B. Second radiator water chamber; 201. Second liquid inlet; 202. Second liquid outlet;

[0028] 3. Water-to-air intercooler; 3A. Inlet side; 3B. Outlet side; 31. Water inlet; 32. First water outlet; 33. Second water outlet; 34. First intercooler water chamber; 35. Second intercooler water chamber; 36. Intercooler core; 37. Baffle; 38. Third intercooler water chamber;

[0029] 4. Water pump; 41. First water pump; 42. Second water pump; 5. Internal combustion engine; 61. Low-temperature heat exchanger; 62. High-temperature heat exchanger. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figures 2 to 4As shown, in an exemplary embodiment of a heat exchanger cooling system for an internal combustion engine of the present invention, the heat exchanger cooling system for an internal combustion engine includes a first radiator 1 , a second radiator 2 and a water-to-air intercooler 3 .

[0035] The first radiator 1 and the second radiator 2 are sequentially arranged along the air inlet direction. The first radiator 1 has a first radiator core 1A and two first radiator water chambers 1B arranged at both ends of the first radiator core 1A. The first radiator core 1A is sequentially divided into a primary radiator core 11 and a secondary radiator core 12 along the air inlet direction. The first radiator water chamber 1B at one end is a middle water chamber 13, and the first radiator water chamber 1B at the other end is divided into a first water outlet chamber 15 connected to the primary radiator core 11 and a first water inlet chamber 14 connected to the secondary radiator core 12. The second radiator 2 has a second radiator core 2A and two second radiator water chambers 2B arranged at both ends of the second radiator core 2A. The water-to-air intercooler 3 has a water inlet 31 and a water outlet, and the water outlet includes a first water outlet 32 ​​and a second water outlet 33. The two sides of the water-to-air intercooler 3 are the air inlet side 3A and the air outlet side 3B, respectively. The first water outlet 32 ​​and the second water outlet 33 are located at the air inlet side 3A and the air outlet side 3B, respectively. The first water outlet chamber 15 is connected to the water inlet 31 through the first water pump 41, and the first water outlet 32 ​​is connected to the first water inlet chamber 14. The primary radiator core 11 and the secondary radiator core 12 are both connected to the middle water chamber 13. The second radiator water chamber 2B at one end is connected to the coolant inlet of the internal combustion engine 5 through the second water pump 42, and the coolant outlet of the internal combustion engine 5 is connected to the second radiator water chamber 2B at the other end.

[0036] Driven by the first water pump 41, the first coolant flowing out of the first water outlet chamber 15 flows to the water-to-air intercooler 3, and then is divided into two parts. One part flows to the first water inlet chamber 14 through the first water outlet 32, and then flows to the middle water chamber 13 through the secondary radiator core 12; the other part flows to the middle water chamber 13 through the second water outlet 33, and merges with the first coolant flowing into the middle water chamber 13 from the first water inlet chamber 14. The merged first coolant flows to the first water outlet chamber 15 through the primary radiator core 11, and is pumped out again by the first water pump 41 to circulate the first coolant.

[0037] Driven by the second water pump 42, the second coolant flowing out of the second radiator water chamber 2B at the first end of the second radiator 2 flows into the internal combustion engine 5 through the coolant inlet, then flows out of the internal combustion engine 5 through the coolant outlet, and flows into the second radiator water chamber 2B at the second end of the second radiator 2, and then flows through the second radiator core 2A to the second radiator water chamber 2B at the first end of the second radiator 2, and is pumped out again by the second water pump 42 to circulate the second coolant.

[0038] The turbocharged intake air is blown in from the intake side and blown out from the outlet side, passing through the water-to-air intercooler 3. The high-temperature intake air exchanges heat with the first coolant in the water-to-air intercooler 3 and is blown out at a lower temperature. The first coolant absorbs heat from the intake air in the water-to-air intercooler 3 and its temperature increases.

[0039] The incoming air passes through the first radiator 1 and the second radiator 2, and the coolant exchanges heat with the incoming air while flowing from the water chamber at one end of the radiator through the radiator core to the water chamber at the other end. The incoming air sequentially passes through the primary radiator core 11, the secondary radiator core 12, and the second radiator core 2A, thereby sequentially exchanging heat with the first coolant in the primary radiator core 11, the first coolant in the secondary radiator core 12, and the second coolant in the second radiator core 2A. As the incoming air blows through the three radiator cores, the temperature gradually increases.

[0040] During the process of the intake air after turbocharging flowing from the intake side 3A to the outlet side 3B, the temperature gradually decreases, that is, the intake temperature of the outlet side 3B is lower than the intake temperature of the intake side 3A. During the process of the first coolant flowing from one end to the other end of the water-to-air intercooler 3, the first coolant flowing near the outlet side 3B performs heat exchange with the intake air at the outlet side 3B. Since the intake air temperature at the outlet side 3B is relatively low, the temperature of the first coolant flowing near the outlet side 3B is relatively low compared to the first coolant flowing near the intake side 3A. The first coolant with relatively low temperature is sent to the middle water chamber 13 through the second water outlet 33, and the other first coolant with relatively high temperature is sent to the first water inlet chamber 14 through the first water outlet 32.

[0041] In the process of the first coolant flowing from the first water inlet chamber 14 to the middle water chamber 13, the temperature of the first coolant is reduced by heat exchange with the intake air. After the first coolant further merges with the first coolant sent from the second water outlet 33 in the middle water chamber 13, the temperature is further reduced, and then enters the primary radiator core 11. In the process of the first coolant flowing from the middle water chamber 13 to the first water outlet chamber 15, the temperature of the first coolant is further reduced by heat exchange with the intake air, and then circulated back to the water-to-air intercooler 3 by the first water pump 41, and heat exchange with the high-temperature intake air is performed again.

[0042] The heat generated by the operation of the internal combustion engine 5 is transferred to the second coolant and sent into the second radiator water chamber 2B at the second end of the second radiator 2. In the process of the second coolant flowing from the second radiator water chamber 2B at the second end through the second radiator core 2A to the second radiator water chamber 2B at the first end, the temperature is reduced by heat exchange with the intake air, and then circulated back to the internal combustion engine 5 by the second water pump 42 to dissipate the heat of the internal combustion engine 5 again.

[0043] Since a portion of the first coolant with a relatively low temperature is first introduced into the middle water chamber 13 between the secondary radiator core 12 and the primary radiator core 11 by the water-to-air intercooler 3, another portion of the first coolant with a relatively high temperature is introduced into the first water inlet chamber 14 by the water-to-air intercooler 3, and heats up in the secondary radiator core 12 through heat exchange with the intake air, the temperature of the two portions of the first coolant after mixing in the middle water chamber 13 is lower, and while the temperature of the first coolant in the first water outlet chamber 15 remains unchanged, the temperature difference of the first coolant at both ends of the primary radiator core 11 is lower, and the temperature difference before and after the intake air passes through the primary radiator core 11 is lower. Furthermore, since the temperature difference before and after the intake air passes through the primary radiator core 11 is reduced, the temperature of the intake air before passing through the secondary radiator core 12 is lower, and the temperature difference before and after the intake air passes through the secondary radiator core 12 is lower, and finally the average temperature difference of the first radiator 1 is higher.

[0044] like Figure 1 The conventional structure cooling system shown is applied to the heat dissipation of the internal combustion engine. When the ambient temperature is 45°C, the intake air is 45°C. In order to meet the heat dissipation requirements of the water-to-air intercooler for the intake air, the first coolant flowing out of the first end of the low-temperature heat exchanger 61 is 65°C, and is sent to the water inlet end of the water-to-air intercooler 3 through the water inlet through the water pump 4. The first coolant in the water inlet end of the water-to-air intercooler 3 is 65°C. The intake air after turbocharging passes through the water-to-air intercooler 3. In the process of the first coolant flowing from the water inlet end of the water-to-air intercooler 3 to the water outlet end of the water-to-air intercooler 3, it exchanges heat with the high-temperature intake air, so that the first coolant flowing out of the water outlet end of the water-to-air intercooler 3 reaches 77°C and is sent to the second end of the low-temperature heat exchanger 61. After passing through the water-to-air intercooler 3, the high-temperature intake air is reduced from 240°C to 75°C. The first coolant at 77°C is sent to the second end of the low-temperature heat exchanger 61 by the water-to-air intercooler 3, and in the process of flowing from the second end of the low-temperature heat exchanger 61 to the first end of the low-temperature heat exchanger 61, it exchanges heat with the intake air at 45°C, so that the temperature of the first coolant is reduced to 65°C, and is sent to the water-to-air intercooler 3 again through the water pump 4, and the intake air flowing out of the low-temperature heat exchanger 61 rises to 66°C due to the absorption of the heat of the first coolant. The heat generated by the internal combustion engine 5 makes the temperature of the outflowing second coolant reach 100°C, and the 100°C second coolant is sent to the second end of the high-temperature heat exchanger 62, and in the process of flowing from the second end of the high-temperature heat exchanger 62 to the first end of the high-temperature heat exchanger 62, it exchanges heat with the intake air at 66°C, so that the temperature of the second coolant is reduced to 93°C, and is sent to the internal combustion engine 5 again through the water pump 4, and the intake air flowing out of the high-temperature heat exchanger 62 rises to 80°C due to the absorption of the heat of the second coolant.

[0045] It can be seen that when the conventional cooling system is applied to the heat dissipation of the internal combustion engine at an ambient temperature of 45°C, the average temperature difference of the low-temperature heat exchanger 61 is 15.1, and the average temperature difference of the high-temperature heat exchanger 62 is 23.3. When the conventional cooling system is applied to the heat dissipation of the internal combustion engine at an ambient temperature of 50°C, the average temperature difference of the low-temperature heat exchanger 61 is 9.8, and the average temperature difference of the high-temperature heat exchanger 62 is 18.3, that is, as the extreme ambient temperature increases, the average temperature difference between the low-temperature heat exchanger 61 and the high-temperature heat exchanger 62 decreases. In order to ensure that the heat dissipation of the conventional cooling system can meet the heat dissipation requirements of the internal combustion engine, the heat dissipation can only be increased by increasing the heat dissipation area of ​​the radiator, which cannot meet the requirements of increasing the extreme ambient temperature and reducing the external dimensions of the radiator.

[0046] like Figures 2 to 4The heat exchanger cooling system for an internal combustion engine of the present invention is applied to the heat dissipation of an internal combustion engine. When the ambient temperature is 50°C, the intake air is 50°C, and the working state of the internal combustion engine and the working state of the water pump remain fixed. In order to meet the heat dissipation requirements of the water-to-air intercooler for the intake air, the first coolant flowing out of the first water outlet chamber 15 is also 65°C, and is sent to the first end of the water-to-air intercooler 3 through the water inlet 31 through the first water pump 41. The first coolant in the first end of the water-to-air intercooler 3 is 65°C. The intake air after turbocharging passes through the water-to-air intercooler 3. During the process of the first coolant flowing from the first end of the water-to-air intercooler 3 to the second end of the water-to-air intercooler 3, a part of it is close to the intake side 3A, and the other part is close to the outlet side 3B, and both are heat exchanged with the high-temperature intake air. In the process of high-temperature intake air passing through the water-to-air intercooler 3, the temperature is reduced from 240°C on the intake side 3A to 75°C on the outlet side 3B. Since the intake temperature on the intake side 3A is higher and the intake temperature on the outlet side 3B is relatively lower, the first coolant flowing near the intake side 3A is heated to 88°C and is delivered to the first water inlet chamber 14 through the first water outlet 32, while the first coolant flowing near the outlet side 3B is only heated to 68°C and is delivered to the middle water chamber 13 through the second water outlet 33. In the process of flowing from the first water inlet chamber 14 to the middle water chamber 13, the first coolant at 88°C exchanges heat with the intake air at 60°C, so that the temperature of the first coolant flowing into the middle water chamber 13 through the secondary radiator core 12 is 74°C. After the first coolant at 68°C merges with it, the first coolant is cooled to 71°C and sent to the primary radiator core 11. In the process of flowing from the middle water chamber 13 through the primary radiator core 11 to the first water outlet chamber 15, the first coolant at 71°C exchanges heat with the intake air at 50°C, so that the temperature of the first coolant is reduced to 65°C, and is sent to the water-to-air intercooler 3 again through the first water pump 41. The intake air flowing out of the primary radiator core 11 only rises to 60°C due to absorbing the heat of the first coolant therein, and is blown into the secondary radiator core 12 to exchange heat with the first coolant therein. The heat generated by the internal combustion engine makes the temperature of the outflowing second coolant reach 100°C. The 100°C second coolant is sent to the second radiator water chamber 2B at the second end of the second radiator 2, and in the process of flowing from the second radiator water chamber 2B at the second end through the second radiator core 2A to the second radiator water chamber 2B at the first end, heat exchange is performed with the intake air at 71°C, so that the temperature of the second coolant is reduced to 93°C, and is again sent to the internal combustion engine 5 through the second water pump 42, and the intake air flowing out of the second radiator 2 rises to 85°C due to absorbing the heat of the second coolant.

[0047] It can be seen that when the heat exchanger cooling system for an internal combustion engine of the present invention is applied to the heat dissipation of the internal combustion engine at an ambient temperature of 50°C, the average temperature difference of the first-stage radiator core 11 is 12.9, the average temperature difference of the second-stage radiator core 12 is 15.5, and the average temperature difference of the second radiator 2 is 18.3. Therefore, compared with the heat dissipation of the internal combustion engine applied to the heat dissipation of the traditional structure cooling system at an ambient temperature of 50°C, the first radiator 1 in the heat exchanger cooling system for an internal combustion engine of the present invention has a higher average temperature difference as a whole, and can achieve more heat dissipation without increasing the heat dissipation area, or make the heat dissipation meet the heat dissipation demand while reducing the heat dissipation area, and has stronger heat dissipation performance. Under the condition of a higher extreme use ambient temperature of 50°C, the radiator's external dimensions are not increased or even reduced, that is, the requirements of increasing the extreme use ambient temperature and reducing the external dimensions of the radiator can be met. Furthermore, compared to the higher and more extreme ambient temperature of 50°C, the heat exchanger cooling system for an internal combustion engine of the present invention is applied to the heat dissipation of the internal combustion engine when the ambient temperature is lower than 45°C, which can better meet the extreme operating ambient temperature of 45°C and reduce the requirements for the external dimensions of the radiator.

[0048] In the above-mentioned schematic embodiment, the first radiator in the heat exchanger cooling system for the internal combustion engine is provided with two radiator cores, and the two radiator cores are connected in series through the intermediate water chamber. The coolant with a relatively low temperature on the outlet side of the water-to-air intercooler is introduced into the intermediate water chamber, thereby increasing the average temperature difference between the primary radiator core and the secondary radiator core at a higher extreme ambient temperature, that is, increasing the average temperature difference of the first radiator as a whole. Without increasing the heat dissipation area or even reducing the heat dissipation area, the heat dissipation demand of the internal combustion engine is met, the external dimensions of the radiator in the cooling system are reduced, and the problems of weak heat dissipation performance, low extreme ambient temperature, and large external dimensions existing in the traditional structural cooling system are solved.

[0049] In some embodiments, Figure 3 As shown, the water-to-air intercooler 3 has a first intercooler water chamber 34 and a second intercooler water chamber 35 at both ends, the water inlet 31 is arranged in the first intercooler water chamber 34 , and the first water outlet 32 ​​and the second water outlet 33 are arranged in the second intercooler water chamber 35 .

[0050] The first coolant enters the first intercooler water chamber 34 at one end through the water inlet 31, further flows through the middle intercooler core 36 to the second intercooler water chamber 35 at the other end, and then is sent out through the first water outlet 32 ​​and the second water outlet 33. The intake air passes through the water-to-air intercooler 3, blows through the intercooler core 36, and exchanges heat with the first coolant flowing through. The intercooler core 36 has a large surface area, so that the coolant can fully exchange heat with the intake air flowing through.

[0051] The water-to-air intercooler 3 of the conventional cooling system has a water inlet and a water outlet both located in the middle of the corresponding water tank. After the coolant enters the water tank at one end through the water inlet, it is divided into various pipes in the width direction of the intercooler core, and then flows out through the water outlet after converging to the center of the water tank at the other end. The first water outlet 32 ​​and the second water outlet 33 are both set in the second intercooler water chamber 35 at one end. Compared with the water-to-air intercooler of the conventional structure, the number and position of the water outlets are changed, so that the two parts of the first coolant with higher temperature and lower temperature after heat exchange with the intake air can be led out respectively, and the water-to-air intercooler of the conventional structure is easy to modify.

[0052] In some embodiments, the water inlet 31 is located on the air outlet side 3B. The water inlet 31 located on the air outlet side 3B can prevent the first coolant from exchanging heat with the high-temperature intake air as soon as it enters the water-to-air intercooler 3, and ensure that the first coolant can be divided into a high-temperature part and a low-temperature part. When the high-temperature intake air passes through the water-to-air intercooler 3, it flows in from the air inlet side 3A and flows out from the air outlet side 3B. During the flow, the temperature of the intake air gradually decreases. The first water outlet 32 ​​and the second water outlet 33 are located on the air inlet side 3A and the air outlet side 3B, respectively. The first coolant with a higher temperature near the air inlet side 3A flows out from the first water outlet 32, and the first coolant with a lower temperature near the air outlet side 3B flows out from the second water outlet 33.

[0053] In some embodiments, Figure 4 As shown, the second intercooler water chamber 35 is divided into two chambers by a partition 37, and the first water outlet 32 ​​and the second water outlet 33 are respectively arranged on the two chambers. After entering the second intercooler water chamber 35, the first coolant flowing near the air inlet side 3A and the first coolant flowing near the air outlet side 3B are separated by the partition 37, thereby preventing the two parts of the first coolant with different temperatures from mixing and raising the temperature of the first coolant sent out by the second water outlet 33.

[0054] In some embodiments, Figure 2 As shown, the water-to-air intercooler 3 has a first intercooler water chamber 34, a second intercooler water chamber 35 and a third intercooler water chamber 38. The first intercooler water chamber 34 and the third intercooler water chamber 38 are respectively located at the outlet side 3B and the inlet side 3A, and are both located at the same end of the water-to-air intercooler 3, the second intercooler water chamber 35 is located at the other end of the water-to-air intercooler 3, the water inlet 31 is provided in the first intercooler water chamber 34, the first water outlet 32 ​​is provided in the third intercooler water chamber 38, and the second water outlet 33 is provided in the second intercooler water chamber 35.

[0055] The first coolant enters the first intercooler water chamber 34 at the first end through the water inlet 31, passes through the intercooler core 36 close to the air outlet side 3B, and enters the second intercooler water chamber 35 at the second end. A portion of the first coolant in the second intercooler water chamber 35 flows into the intermediate water chamber 13 through the second water outlet 33, and the other portion passes through the intercooler core 36 close to the air intake side 3A and returns to the third intercooler water chamber 38 at the first end, and is then sent to the first water inlet chamber 14 through the first water outlet 32.

[0056] The first coolant flowing out of the first water outlet 32 ​​has a U-shaped flow trajectory in the water-to-air intercooler 3, passes through the intercooler core 36 twice, and performs heat exchange with the intake air more fully, sending more heat to the first water inlet chamber 14 through the first coolant, and dissipating it from the secondary radiator core 12 with a larger average temperature difference, thereby improving the heat dissipation efficiency. Compared with setting the first water outlet 32 ​​and the second water outlet 33 in the same water chamber, the second intercooler water chamber 35 only has the second liquid outlet 202, and only the first coolant near the air outlet side 3B flows into the intercooler core 36, avoiding the mixing of the high and low temperature first coolants to a certain extent in the same water chamber before they are discharged from the water-to-air intercooler 3 to generate heat exchange, thereby reducing the temperature of the first coolant output from the second water outlet 33 to the greatest extent.

[0057] In some embodiments, Figure 5 As shown, the first radiator 1 and the second radiator 2 are arranged side by side, the width direction of the first radiator 1 and the second radiator 2 is the longitudinal direction, and the two second radiator water chambers 2B respectively have a second liquid outlet 202 and a second liquid inlet 201, the second liquid inlet 201 is connected to the coolant outlet of the internal combustion engine 5, and the second liquid outlet 202 is connected to the coolant inlet of the internal combustion engine 5 through the second water pump 42, and the second liquid outlet 202 and the second liquid inlet 201 are respectively located on both sides in the longitudinal direction;

[0058] The first water inlet chamber 14, the first water outlet chamber 15 and the middle water chamber 13 respectively have a first liquid inlet 101, a first liquid outlet 102 and an intermediate liquid inlet 103. The first liquid outlet 102 and the second liquid outlet 202 are located at the same end and on the side away from the second liquid outlet 202 in the longitudinal direction. The first liquid inlet 101 is located between the first liquid outlet 102 and the second liquid outlet 202, and the intermediate liquid inlet 103 is located on the side away from the second liquid inlet 201 in the longitudinal direction.

[0059] The first liquid inlet 101 and the middle liquid inlet 103 of the first radiator 1, as well as the middle liquid inlet 103 and the first liquid outlet 102 are all arranged diagonally to a certain extent, and the second liquid inlet 201 and the second liquid outlet 202 of the second radiator 2 are also arranged diagonally to a certain extent, so that the coolant can be fully distributed in the corresponding radiator to ensure the heat exchange efficiency, and the liquid ports at the top and bottom of the radiator are staggered in the air inlet direction, so that the connecting pipes can also be staggered, making full use of the space above and below the radiator, further reducing the external dimensions of the cooling system.

[0060] The high-temperature first coolant enters the secondary radiator core 12 of the first radiator 1 from the bottom, and its temperature is greatly reduced when it flows to the middle water chamber. The heat transferred to the incoming air from the top of the secondary radiator core 12 is less, so that the incoming air at the top can absorb more of the high-temperature second coolant sent in from the top of the second radiator 2, thereby improving the heat dissipation efficiency.

[0061] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A heat exchanger cooling system for an internal combustion engine, comprising a first radiator, a second radiator and a water-to-air intercooler; It is characterized in that The first radiator and the second radiator are sequentially arranged along the air inlet direction, and the first radiator comprises a first radiator core and two first radiator water chambers arranged at two ends of the first radiator core; The first radiator core is divided into a primary radiator core and a secondary radiator core in sequence along the air inlet direction, the first radiator water chamber at one end is a middle water chamber, and the first radiator water chamber at the other end is divided into a first water outlet chamber connected to the primary radiator core and a first water inlet chamber connected to the secondary radiator core; The second radiator comprises a second radiator core and two second radiator water chambers arranged at two ends of the second radiator core; The water-to-air intercooler has a water inlet and a water outlet, the water outlet includes a first water outlet and a second water outlet, two sides of the water-to-air intercooler are respectively an air inlet side and an air outlet side, the first water outlet and the second water outlet are respectively located at the air inlet side and the air outlet side; The first water outlet chamber is connected to the water inlet through a first water pump, the first water outlet is connected to the first water inlet chamber, the first-stage radiator core and the second-stage radiator core are both connected to the middle water chamber, and the second water outlet is connected to the middle water chamber; The second radiator water chamber at one end is connected to the coolant inlet of the internal combustion engine through a second water pump, and the coolant outlet of the internal combustion engine is connected to the second radiator water chamber at the other end.

2. The heat exchanger cooling system for an internal combustion engine according to claim 1, characterized in that: The two ends of the water-to-air intercooler are respectively provided with a first intercooler water chamber and a second intercooler water chamber, the water inlet is arranged in the first intercooler water chamber, and the first water outlet and the second water outlet are arranged in the second intercooler water chamber.

3. The heat exchanger cooling system for an internal combustion engine according to claim 2, characterized in that: The water inlet is located at the air outlet side.

4. The heat exchanger cooling system for an internal combustion engine according to claim 2, characterized in that: The second intercooler water chamber is divided into two compartments by a partition, and the first water outlet and the second water outlet are respectively arranged on the two compartments.

5. The heat exchanger cooling system for an internal combustion engine according to claim 1, characterized in that: The water-to-air intercooler comprises a first intercooler water chamber, a second intercooler water chamber and a third intercooler water chamber, the first intercooler water chamber and the third intercooler water chamber are respectively located at the air outlet side and the air inlet side, and are both located at the same end of the water-to-air intercooler, the second intercooler water chamber is located at the other end of the water-to-air intercooler, the water inlet is arranged in the first intercooler water chamber, the first water outlet is arranged in the third intercooler water chamber, and the second water outlet is arranged in the second intercooler water chamber.

6. The heat exchanger cooling system for an internal combustion engine according to claim 1, characterized in that: The first radiator and the second radiator are arranged side by side, the width direction of the first radiator and the second radiator is the longitudinal direction, the two second radiator water chambers respectively have a second liquid outlet and a second liquid inlet, the second liquid inlet is connected to the coolant outlet of the internal combustion engine, the second liquid outlet is connected to the coolant inlet of the internal combustion engine through the second water pump, and the second liquid outlet and the second liquid inlet are respectively located on both sides in the longitudinal direction; The first water inlet chamber, the first water outlet chamber and the middle water chamber respectively have a first liquid inlet, a first liquid outlet and an intermediate liquid inlet, the first liquid outlet and the second liquid outlet are located at the same end and on the side away from the second liquid outlet in the longitudinal direction, the first liquid inlet is located between the first liquid outlet and the second liquid outlet, and the intermediate liquid inlet is located on the side away from the second liquid inlet in the longitudinal direction.

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