A high-efficiency tubular heat exchange structure for automobile heat exchanger

Abstract

The invention discloses a high-efficiency tubular heat exchange structure for an automobile heat exchanger, belonging to the technical field of heat exchangers. The invention adds a discharge pipe, an inner spacer ring and an outer spacer ring coaxially arranged inside a shell, and the three divide the heat exchange space into an outer heat exchange cavity, a middle heat exchange cavity and an inner heat exchange cavity which are distributed from outside to inside and connected in an S shape. The cooling medium and the engine oil medium are subjected to countercurrent heat exchange treatment along the S-shaped path, which prolongs the heat exchange path and time and expands the heat exchange area of ​​the two media. The outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity are respectively provided with spiral outer guide vanes, middle guide vanes and inner guide vanes, so that the cooling medium flows in a spiral shape in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity, so that the cooling medium fully exchanges heat. In addition, during the flow of the cooling medium, the spiral guide vanes rotate along its flow direction, play a continuous propulsion role, and reduce the flow resistance of the cooling medium.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and more particularly to a high-efficiency tubular heat exchange structure for automobile heat exchangers. Background Art

[0002] The automotive heat exchanger is a key component used in vehicle engines and air-conditioning systems. Its main function is to achieve heat transfer and exchange to ensure that the engine and air-conditioning system operate within the optimal temperature range. The engine radiator is mainly used to cool the engine coolant and keep the engine at a suitable operating temperature. The engine oil cooling is an important condition that affects the engine performance.

[0003] There are two major categories of automobile engine heat exchangers. The shell and tube heat exchanger is a cylindrical shell in which many parallel tubes are arranged (these parallel tubes are called tube bundles). The cold and hot fluids flow through the space inside the tube (tube side) and the space outside the tube (shell side) respectively to exchange heat. The traditional shell and tube heat exchanger has a short tube path, and the exchange path and time of the two hot and cold fluids are both short, resulting in limited heat exchange efficiency. In order to increase the heat exchange time between the high-temperature fluid and the low-temperature fluid, the length of the tube bundle and the shell and tube is lengthened, which undoubtedly increases the external space occupied by the heat exchange structure, which has certain disadvantages, and the longer shell and tube or tube bundle increases the resistance to fluid flow.

[0004] To this end, we propose a high-efficiency tubular heat exchange structure for automotive heat exchangers to address the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the existing practical problems. Compared with the existing technology, a high-efficiency tubular heat exchange structure for an automobile heat exchanger is provided. The structure is achieved by adding a coaxially arranged discharge pipe, an inner spacer ring and an outer spacer ring inside the shell. The three divide the heat exchange space into an outer heat exchange chamber, a middle heat exchange chamber and an inner heat exchange chamber distributed from outside to inside and connected in an S shape. The cooling medium and the oil medium are subjected to countercurrent heat exchange treatment along the S-shaped path, which prolongs the heat exchange path and time and expands the heat exchange area of ​​the two media. The outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber are respectively provided with spiral outer guide vanes, middle guide vanes and inner guide vanes, so that the cooling medium flows in a spiral shape in the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber, so that the cooling medium fully exchanges heat. In addition, during the flow of the cooling medium, the spiral guide vanes rotate along its flow direction, play a continuous propulsion role, and reduce the flow resistance of the cooling medium.

[0006] The object of the present invention can be achieved by the following technical scheme: a high-efficiency tubular heat exchange structure for automobile heat exchanger, comprising a shell, tube sheets are installed at both left and right ends of the shell, a heat exchange cavity is formed between a pair of tube sheets and the inside of the shell, a pair of tube sheets are penetrated and inserted with a discharge pipe extending to the outside in the axial direction, a spiral guide plate located in the heat exchange cavity is sleeved on the discharge pipe, an outer spacer ring and an inner spacer ring which are inner and outer coupled and penetrated and embedded on the spiral guide plate are installed between the pair of tube sheets, the outer spacer ring, the inner spacer ring and the discharge pipe divide the heat exchange space into an outer heat exchange cavity, a middle heat exchange cavity and an inner heat exchange cavity distributed from the outside to the inside, and a plurality of tube bundles which are penetrated and inserted on the spiral guide plate and extend to the end of the tube sheet are annularly arranged in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity;

[0007] A left end cover and a right end cover are installed at the left and right ends of the shell. A left flow groove and a right flow groove for connecting the external heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber are respectively opened on the opposite end walls of the left end cover and the right end cover. The top of the left end cover is externally connected to an oil inlet pipe connected to the left flow groove, and the outer end of the right end cover is externally connected to an oil discharge pipe connected to the right flow groove. The bottom end wall of the shell close to the right end cover is externally connected to a cooling medium inlet pipe connected to the external heat exchange chamber, and an outer opening, a middle opening and an inner opening for connecting the external heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber are respectively opened on the outer spacer ring, the inner spacer ring and the discharge pipe.

[0008] Furthermore, the outer ends of the outer spacer ring and the inner spacer ring are arranged flush with the ends of the tube sheet, and the outer spacer ring and the inner spacer ring separate the tube sheet into an outer ring plate, a middle ring plate and an inner ring plate distributed from the outside to the inside, and the outer spacer ring and the inner spacer ring separate the spiral guide vanes into outer guide vanes, middle guide vanes and inner guide vanes distributed one by one in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity.

[0009] Furthermore, the left circulation groove includes a left outer ring groove, a left middle ring groove and a left inner ring groove which are opened on the inner end wall of the left end cover from the outside to the inside and correspond to the positions of the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber respectively, and a left overflow groove is opened between the left middle ring groove and the left inner ring groove.

[0010] Furthermore, the right circulation groove includes a right outer ring groove, a right middle ring groove and a right inner ring groove which are opened from the outside to the inside at the inner end of the right end cover and also correspond to the positions of the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber. A right overflow groove is opened between the right outer ring groove and the right middle ring groove.

[0011] Furthermore, the left outer ring groove and the right outer ring groove are respectively connected to the outer heat exchange chamber, the left middle ring groove and the right middle ring groove are respectively connected to the middle heat exchange chamber, the left inner ring groove and the right inner ring groove are respectively connected to the inner heat exchange chamber, and the outer heat exchange chamber, the middle heat exchange chamber, and the inner heat exchange chamber are connected from head to tail through the left flow groove and the right flow groove, forming an S-shaped structure.

[0012] Furthermore, the outer port is arranged near the left end cover and is connected between the outer heat exchange chamber and the middle heat exchange chamber. The middle port is arranged near the right end cover and is connected between the middle heat exchange chamber and the inner heat exchange chamber. The inner port is arranged near the left end cover and is connected with the inner heat exchange chamber.

[0013] Furthermore, the left end cover and the right end cover are rotatably connected to the left and right ends of the shell respectively, and the left end cover and the right end cover outer end wall are respectively fixedly sleeved with a left transmission wheel and a right transmission wheel for rotationally driving them.

[0014] Furthermore, the left and right ends of the outer spacer ring are fixedly connected to a pair of outer ring plates, the left and right ends of the inner spacer ring and the discharge pipe are fixedly connected to a pair of inner ring plates, the ends of multiple tube bundles located in the outer heat exchange cavity and the inner heat exchange cavity extend outwardly, penetrate the outer ring plate and the inner ring plate respectively, and are fixed in the left outer ring groove and the left inner ring groove on the left end cover, and the ends of multiple tube bundles located in the middle heat exchange cavity extend outwardly, penetrate the middle ring plate, and are fixed in the right middle ring groove on the right end cover.

[0015] Furthermore, a plurality of left connecting grooves corresponding to the position of the middle heat exchange cavity are annularly formed on the outer end wall of the left middle ring groove, and a plurality of right connecting grooves 1 and 2 corresponding to the positions of the outer heat exchange cavity and the inner heat exchange cavity are annularly formed on the outer end walls of the right outer ring groove and the right inner ring groove, respectively. By fixing the outer ring plate, the inner ring plate and the tube bundle located at the outer heat exchange cavity and the inner heat exchange cavity with the left end cover, and fixing the middle ring plate and the tube bundle located at the middle heat exchange cavity with the right end cover, the left end cover and the right end cover are driven in reverse to rotate, the outer guide vanes and the inner guide vanes in the outer heat exchange cavity and the inner heat exchange cavity rotate in the same direction, and the middle guide vanes in the inner heat exchange cavity rotate in the opposite direction. Since the outer guide vanes, the middle guide vanes and the inner guide vanes are all spiral structures, their synchronous rotation with the tube bundle is beneficial to push the cooling medium flowing in the heat exchange cavity in the flow direction, thereby reducing the flow resistance of the cooling medium.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The present scheme is to add a discharge pipe, an inner spacer ring and an outer spacer ring arranged coaxially inside the shell. The outer spacer ring, the inner spacer ring and the discharge pipe divide the heat exchange space into an outer heat exchange chamber, a middle heat exchange chamber and an inner heat exchange chamber distributed from the outside to the inside. The outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber are respectively provided with a spiral outer guide plate, a middle guide plate and an inner guide plate. The outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber are connected from head to tail through a left flow groove arranged on the left end cover and a right flow groove arranged on the right end cover, forming an S-shaped structure. The cooling medium is introduced into the outer heat exchange chamber through the cooling medium inlet pipe, flows along the S-shaped path, and performs heat exchange treatment with the engine oil which also flows countercurrently in the S-shaped path. In addition, the spiral guide plate is arranged in a spiral structure, so that the cooling medium flows in a spiral shape in the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber, which not only extends the heat exchange path, but also expands the heat exchange area of ​​the two media, thereby realizing efficient heat exchange.

[0018] This solution also fixes the outer ring plate, the inner ring plate and the tube bundle located at the outer heat exchange cavity and the inner heat exchange cavity with the left end cover, and fixes the middle ring plate and the tube bundle located at the middle heat exchange cavity with the right end cover, and reversely drives the left end cover and the right end cover to rotate, and the outer guide vanes and the inner guide vanes in the outer heat exchange cavity and the inner heat exchange cavity rotate in the same direction, and the middle guide vanes in the inner heat exchange cavity rotate in the opposite direction. Since the outer guide vanes, the middle guide vanes and the inner guide vanes are all spiral structures, their synchronous rotation with the tube bundle is conducive to continuously circulating and pushing the cooling medium flowing in the heat exchange cavity in the flow direction, thereby reducing the flow resistance of the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 A cross-sectional view from another perspective of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the left end cover of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the right end cover of the present invention;

[0024] Figure 6 The structure of the spiral guide vane, the outer separation ring and the inner separation ring of the present invention is schematically shown. Figure 1 ;

[0025] Figure 7 It is a cross-sectional view of the joint of the spiral guide vane, the outer separation ring and the inner separation ring of the present invention;

[0026] Figure 8 The structure of the spiral guide vane, outer separator ring and inner separator ring of the present invention is schematically shown. Figure 2 ;

[0027] Fig. 9 It is an overall cross-sectional view of the present invention;

[0028] Fig.10 It is a cross-sectional schematic diagram of the present invention when working;

[0029] Fig.11 It is a flow diagram of two media heat exchange in the present invention;

[0030] Fig.12 The structure diagram of the left end cover and the right end cover in Example 2 when they are separated from the housing is shown in FIG. Figure 1 ;

[0031] Fig.13 The structure diagram of the left end cover and the right end cover in Example 2 when they are separated from the housing is shown in FIG. Figure 2 ;

[0032] Fig.14 is a cross-sectional view in Example 2;

[0033] Fig.15 This is a cross-sectional view from another perspective in Example 2.

[0034] Description of the numbers in the figure:

[0035] 1. Shell; 2. Left end cover; 201. Left outer ring groove; 202. Left middle ring groove; 203. Left inner ring groove; 204. Left overflow groove; 205. Left connecting groove; 3. Right end cover; 301. Right outer ring groove; 302. Right middle ring groove; 303. Right inner ring groove; 304. Right overflow groove; 305. Right connecting groove 1; 306. Right connecting groove 2; 4. Tube sheet; 41. Outer ring plate; 42 , middle ring plate; 43, inner ring plate; 5, spiral guide vane; 51, outer guide vane; 52, middle guide vane; 53, inner guide vane; 6, outer spacer ring; 601, outer port; 7, inner spacer ring; 701, middle port; 8, tube bundle; 9, drain pipe; 901 inner port; 10, oil inlet pipe; 11, cooling medium inlet pipe; 12, oil drain pipe; 13, left drive wheel; 14, right drive wheel. DETAILED DESCRIPTION

[0036] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0037] Example 1: The present invention discloses a high-efficiency tubular heat exchange structure for automobile heat exchangers, see Figure 1-Figure 3 , including a shell 1, with tube sheets 4 embedded and installed at both left and right ends of the shell 1, a heat exchange cavity is formed between a pair of tube sheets 4 and the inside of the shell 1, a pair of tube sheets 4 are penetrated and inserted with a discharge pipe 9 extending to the outside in the axial direction, and a spiral guide plate 5 located in the heat exchange cavity is sleeved on the discharge pipe 9, and an outer spacer ring 6 and an inner spacer ring 7 that are inner and outer connected and penetrate and embedded on the spiral guide plate 5 are installed between the pair of tube sheets 4, and the outer spacer ring 6, the inner spacer ring 7, and the discharge pipe 9 divide the heat exchange space into an outer heat exchange cavity, a middle heat exchange cavity, and an inner heat exchange cavity distributed from the outside to the inside, and a plurality of tube bundles 8 that penetrate and are inserted on the spiral guide plate 5 and extend to the end of the tube sheet 4 are annularly arranged in the outer heat exchange cavity, the middle heat exchange cavity, and the inner heat exchange cavity, and the spiral guide plate 5, the outer spacer ring 6, the inner spacer ring 7 and the tube bundle 8 are all made of heat conductive material.

[0038] See also Figure 6-Figure 8 The outer ends of the outer spacer ring 6 and the inner spacer ring 7 are both flush with the ends of the tube sheet 4. The outer spacer ring 6 and the inner spacer ring 7 separate the tube sheet 4 into an outer ring plate 41, a middle ring plate 42 and an inner ring plate 43 distributed from the outside to the inside. The outer spacer ring 6 and the inner spacer ring 7 separate the spiral guide vanes 5 into outer guide vanes 51, middle guide vanes 52 and inner guide vanes 53 distributed one by one in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity. The tube sheet 4 and the spiral guide vanes 5 are provided with through holes for the tube bundle 8 to pass through, and the tube bundle 8 is fixedly connected to the through holes.

[0039] See also Figure 2-Figure 5 The left and right ends of the housing 1 are provided with a left end cover 2 and a right end cover 3. The left end cover 2 and the right end cover 3 are provided with a left flow groove and a right flow groove for connecting the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity. The top end of the left end cover 2 is externally connected to an oil inlet pipe 10 connected to the left flow groove. The outer end of the right end cover 3 is fixedly connected to an oil discharge pipe 12 connected to the right flow groove.

[0040] Specifically, the left circulation groove includes a left outer ring groove 201, a left middle ring groove 202 and a left inner ring groove 203 which are opened from the outside to the inside on the inner end wall of the left end cover 2 and correspond to the positions of the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity respectively, and a left overflow groove 204 is opened between the left middle ring groove 202 and the left inner ring groove 203. The right circulation groove includes a right outer ring groove 301, a right middle ring groove 302 and a right inner ring groove 303 which are opened from the outside to the inside on the inner end of the right end cover 3 and also correspond to the positions of the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity, and a right overflow groove 304 is opened between the right outer ring groove 301 and the right middle ring groove 302;

[0041] The left outer ring groove 201 and the right outer ring groove 301 are respectively connected to the outer heat exchange cavity, the left middle ring groove 202 and the right middle ring groove 302 are respectively connected to the middle heat exchange cavity, the left inner ring groove 203 and the right inner ring groove 303 are respectively connected to the inner heat exchange cavity, and the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity are connected from head to tail through the left flow groove and the right flow groove, forming an S-shaped structure. It should be supplemented that the two ends of the tube bundle 8 are respectively penetrated to the end walls of the left end cover 2 and the right end cover 3, and the end walls of the left end cover 2 and the right end cover 3 are provided with through grooves for the tube bundle 8 to penetrate, so as to realize the connection of multiple groups 8 distributed inside and outside with the left flow groove and the right flow groove.

[0042] See also Figure 9-11The oil medium to be cooled is injected into the left outer annular groove 201 of the left end cover 2 through the oil inlet pipe 10. The oil medium is introduced from the left outer annular groove 201 into the tube bundles 8 at the multiple outer heat exchange chambers, and then introduced into the right outer annular groove 301 of the right end cover 3 through the tube bundle 8, and then introduced into the tube bundle 8 at the middle heat exchange chamber through the right overflow groove 304 and the right middle annular groove 302, and then introduced into the left middle annular groove 202 of the left end cover 2 through the tube bundle 8 of the middle heat exchange chamber, and then introduced into the tube bundle 8 at the inner heat exchange chamber through the left overflow groove 204 and the left inner annular groove 203, and then introduced into the right inner annular groove 303 of the right end cover 3 through the tube bundle 8 of the inner heat exchange chamber, and finally discharged outwardly through the oil discharge pipe 12, so that the oil medium flows through the outer heat exchange chamber, the middle heat exchange chamber, and the inner heat exchange chamber in an S shape.

[0043] The bottom end wall of the shell 1 close to the right end cover 3 is externally connected to a cooling medium inlet pipe 11 connected to the external heat exchange chamber, the bottom end wall of the outer spacer ring 6 close to the left end cover 2 is provided with an outer opening 601 connected to the outer heat exchange chamber and the middle heat exchange chamber, the bottom end wall of the inner spacer ring 7 close to the right end cover 3 is provided with a middle opening 701 connected to the middle heat exchange chamber and the inner heat exchange chamber, and the end wall of the discharge pipe 9 close to the left end cover 2 is provided with an inner opening 901 connected to the inner heat exchange chamber.

[0044] The cooling medium is introduced into the inner side of the right end of the shell 1 through the cooling medium inlet pipe 11. The cooling medium is first injected into the outer guide plate 51 at the end of the outer heat exchange chamber, and flows to the left along the spiral direction of the outer guide plate 51 through the entire outer heat exchange chamber. After moving to the left end of the outer heat exchange chamber, the cooling medium is introduced into the middle heat exchange chamber through the outer port 601, and similarly flows to the right along the spiral direction of the middle guide plate 52 through the entire middle heat exchange chamber. After moving to the right end of the middle heat exchange chamber, the cooling medium is introduced into the inner heat exchange chamber through the middle port 701, and similarly moves to the left along the spiral direction of the inner guide plate 53. After moving to the left end of the inner heat exchange chamber, the cooling medium is introduced into the discharge pipe 9 through the inner port 901, and the discharge pipe 9 is moved to the left for discharge, so that the cooling medium is guided to flow from the outside to the inside and back and forth left and right, and heat exchange treatment is performed with the engine oil medium which also flows countercurrently in the S-shaped path. In addition, the cooling medium moves along a spiral path during the left and right reciprocating motion, which not only extends the heat exchange path, but also expands the heat exchange area of ​​the two media.

[0045] Embodiment 2: Based on Embodiment 1, this embodiment improves the heat exchange structure as follows:

[0046] See also Figure 12-Figure 15The left end cover 2 and the right end cover 3 are respectively connected with the left and right ends of the shell 1 for rotation. The left drive wheel 13 and the right drive wheel 14 for rotationally driving the left and right end covers 2 and 3 are respectively fixedly sleeved on the outer end walls. The left and right ends of the outer spacer ring 6 are fixedly connected with a pair of outer ring plates 41. The left and right ends of the inner spacer ring 7 and the discharge pipe 9 are fixedly connected with a pair of inner ring plates 43. The ends of the multiple tube bundles 8 located in the outer heat exchange cavity and the inner heat exchange cavity extend outward and penetrate the outer ring plate 41 and the inner ring plate 43 respectively and are fixed in the left outer ring groove 201 and the left inner ring groove 203 on the left end cover 2. The ends of the multiple tube bundles 8 located in the middle heat exchange cavity extend outward and penetrate the middle ring plate 42 and are fixed in the right middle ring groove 302 on the right end cover 3, so that the outer guide vanes 51, the inner guide vanes 53 and the tube bundles 8 at the outer heat exchange cavity and the inner heat exchange cavity rotate with the left end cover 2, and the middle guide vanes 51 and the tube bundles 8 at the middle heat exchange cavity rotate in the opposite direction with the right end cover 3.

[0047] The outer end wall of the left middle ring groove 202 is provided with a plurality of left connecting grooves 205 corresponding to the position of the middle heat exchange cavity, and the outer end wall of the right outer ring groove 301 and the right inner ring groove 303 is provided with a plurality of right connecting grooves 1 305 and right connecting grooves 2 306 corresponding to the positions of the outer heat exchange cavity and the inner heat exchange cavity, respectively. By fixing the outer ring plate 41, the inner ring plate 43 and the tube bundle 8 located at the outer heat exchange cavity and the inner heat exchange cavity to the left end cover 2, the middle ring plate 42 and the tube bundle 8 located at the middle heat exchange cavity are connected. The bundle 8 is fixedly connected to the right end cover 3, and reversely drives the left end cover 2 and the right end cover 3 to rotate. The outer guide vanes 51 and the inner guide vanes 53 in the outer heat exchange cavity and the inner heat exchange cavity rotate in the same direction, and the middle guide vanes 52 in the inner heat exchange cavity rotate in the opposite direction. Since the outer guide vanes 51, the middle guide vanes 52 and the inner guide vanes 53 are all spiral structures, they are conducive to pushing the cooling medium flowing in the heat exchange cavity in the flow direction during the synchronous rotation with the tube bundle 8, thereby reducing the flow resistance of the cooling medium.

[0048] In summary, the present invention is to add a discharge pipe 9, an inner spacer ring 7, and an outer spacer ring 6 coaxially arranged inside the shell 1, and the outer spacer ring 6, the inner spacer ring 7, and the discharge pipe 9 divide the heat exchange space into an outer heat exchange cavity, a middle heat exchange cavity, and an inner heat exchange cavity distributed from the outside to the inside, and the outer heat exchange cavity, the middle heat exchange cavity, and the inner heat exchange cavity are respectively provided with a spiral outer guide plate 51, a middle guide plate 52, and an inner guide plate 53, and the outer heat exchange cavity, the middle heat exchange cavity, and the inner heat exchange cavity are connected between the head and the tail through the left flow groove arranged on the left end cover 2 and the right flow groove arranged on the right end cover 3. The through grooves are interconnected and have an S-shaped structure. The oil medium is introduced into the left outer ring groove 201 of the left end cover 2 through the oil inlet pipe 10. The oil medium flows through the multiple tube bundles 8 of the outer heat exchange cavity, the middle heat exchange cavity, and the inner heat exchange cavity in the S-shaped path in sequence, and is discharged from the oil discharge pipe 12 on the right end cover 3. At the same time, the cooling medium is introduced into the outer heat exchange cavity through the cooling medium inlet pipe 11. The cooling medium flows along the S-shaped path from outside to inside through the inner heat exchange cavity, the middle heat exchange cavity, and the outer heat exchange cavity, and flows in the opposite direction with the oil medium to perform efficient heat exchange treatment;

[0049] The spiral guide vane 5 is arranged in a spiral structure, so that the cooling medium flows in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity in a spiral shape, which not only extends the heat exchange path, but also expands the heat exchange area of ​​the two media.

[0050] In addition, by fixing the outer ring plate 41, the inner ring plate 43 and the tube bundle 8 located at the outer heat exchange cavity and the inner heat exchange cavity to the left end cover 2, and fixing the middle ring plate 42 and the tube bundle 8 located at the middle heat exchange cavity to the right end cover 3, the left end cover 2 and the right end cover 3 are driven in reverse to rotate, and the outer guide vanes 51 and the inner guide vanes 53 in the outer heat exchange cavity and the inner heat exchange cavity rotate in the same direction, and the middle guide vanes 52 in the inner heat exchange cavity rotate in the opposite direction. Since the outer guide vanes 51, the middle guide vanes 52 and the inner guide vanes 53 all have a spiral structure, their synchronous rotation with the tube bundle 8 is conducive to continuously circulating the cooling medium flowing in the heat exchange cavity in the flow direction, thereby reducing the flow resistance of the cooling medium.

[0051] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A high-efficiency tubular heat exchange structure for an automobile heat exchanger, comprising a shell (1), wherein tube sheets (4) are installed at both left and right ends of the shell (1), and characterized in that: A heat exchange cavity is formed between a pair of tube sheets (4) and the interior of the shell (1); a pair of the tube sheets (4) are provided with a discharge pipe (9) extending to the outside and inserted in the axial direction; a spiral guide plate (5) located in the heat exchange cavity is sleeved on the discharge pipe (9); an outer spacer ring (6) and an inner spacer ring (7) which are connected inside and outside and penetrate and are embedded in the spiral guide plate (5) are installed between the pair of tube sheets (4); the outer spacer ring (6), the inner spacer ring (7) and the discharge pipe (9) divide the heat exchange space into an outer heat exchange cavity, a middle heat exchange cavity and an inner heat exchange cavity which are distributed from outside to inside; a plurality of tube bundles (8) which are inserted through the spiral guide plate (5) and extend to the end of the tube sheet (4) are annularly provided in the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity; The left and right ends of the shell (1) are respectively provided with a left end cover (2) and a right end cover (3); the left end cover (2) and the right end cover (3) are respectively provided with a left flow groove and a right flow groove for connecting the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber end to end on the opposite end walls; the top end of the left end cover (2) is externally connected to an oil inlet pipe (10) connected to the left flow groove; the outer end of the right end cover (3) is externally connected to an oil discharge pipe (12) connected to the right flow groove; the bottom end wall of the shell (1) close to the right end cover (3) is externally connected to a cooling medium inlet pipe (11) connected to the outer heat exchange chamber; the outer spacer ring (6), the inner spacer ring (7) and the discharge pipe (9) are respectively provided with an outer opening (601), a middle opening (701) and an inner opening (901) for connecting the outer heat exchange chamber, the middle heat exchange chamber and the inner heat exchange chamber; The outer ends of the outer spacer ring (6) and the inner spacer ring (7) are both arranged flush with the ends of the tube sheet (4). The outer spacer ring (6) and the inner spacer ring (7) separate the tube sheet (4) into an outer ring plate (41), a middle ring plate (42) and an inner ring plate (43) which are arranged from the outside to the inside. The left flow groove comprises a left outer ring groove (201), a left middle ring groove (202) and a left inner ring groove (203) which are opened on the inner end wall of the left end cover (2) from the outside to the inside and correspond to the positions of the outer heat exchange cavity, the middle heat exchange cavity and the inner heat exchange cavity respectively. A left overflow groove (204) is opened between the left middle ring groove (202) and the left inner ring groove (203). The right circulation groove comprises a right outer ring groove (301), a right middle ring groove (302), and a right inner ring groove (303) which are opened on the right end cover (3) from the outside to the inside and correspond to the positions of the outer heat exchange cavity, the middle heat exchange cavity, and the inner heat exchange cavity. A right overflow groove (304) is opened between the right outer ring groove (301) and the right middle ring groove (302). The left outer ring groove (201) and the right outer ring groove (301) are respectively connected to the outer heat exchange cavity. The left middle ring groove (202) and the right middle ring groove (302) are respectively connected to the middle heat exchange cavity. The left inner ring groove (203) and the right inner ring groove (303) are respectively connected to the inner heat exchange cavity.

2. The high-efficiency tubular heat exchange structure for an automobile heat exchanger according to claim 1, characterized in that: The outer opening (601) is arranged close to one side of the left end cover (2) and is in communication with the outer heat exchange chamber and the middle heat exchange chamber. The middle opening (701) is arranged close to one side of the right end cover (3) and is in communication with the middle heat exchange chamber and the inner heat exchange chamber. The inner opening (901) is arranged close to one side of the left end cover (2) and is in communication with the inner heat exchange chamber.

3. The high-efficiency tubular heat exchange structure for an automobile heat exchanger according to claim 2, characterized in that: The left end cover (2) and the right end cover (3) are respectively rotatably connected to the left and right ends of the housing (1); and a left transmission wheel (13) and a right transmission wheel (14) for rotationally driving the left and right end covers (2) and (3) are respectively fixedly sleeved on the outer end walls.

4. The high-efficiency tubular heat exchange structure for automobile heat exchanger according to claim 3, characterized in that: The left and right ends of the outer spacer ring (6) are fixedly connected to a pair of outer ring plates (41); the left and right ends of the inner spacer ring (7) and the discharge pipe (9) are fixedly connected to a pair of inner ring plates (43); the ends of the multiple tube bundles (8) located in the outer heat exchange cavity and the inner heat exchange cavity extend outwards, penetrate the outer ring plate (41) and the inner ring plate (43) respectively, and are fixed in the left outer ring groove (201) and the left inner ring groove (203) on the left end cover (2); the ends of the multiple tube bundles (8) located in the middle heat exchange cavity extend outwards, penetrate the middle ring plate (42), and are fixed in the right middle ring groove (302) on the right end cover (3).

5. The high-efficiency tubular heat exchange structure for automobile heat exchanger according to claim 4, characterized in that: The outer end wall of the left middle annular groove (202) is provided with a plurality of left connecting grooves (205) corresponding to the position of the middle heat exchange cavity, and the outer end walls of the right outer annular groove (301) and the right inner annular groove (303) are provided with a plurality of right connecting grooves 1 (305) and right connecting grooves 2 (306) corresponding to the positions of the outer heat exchange cavity and the inner heat exchange cavity, respectively.

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