Heat exchanger
By setting scroll parts and scrolls in the shell, the tube bundles are distributed within the scrolls, which solves the problems of low space utilization rate and impurities retention of shell and tube heat exchangers, and achieves efficient heat exchange and stable operation of the equipment.
Patent Information
- Application Number
- CN202410841153.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-07-25
AI Technical Summary
The copper tubes of existing shell and tube heat exchangers are usually distributed in the center of the cylinder, resulting in large reserved space around and low utilization. The baffle plate is easily set up to produce blind spots, resulting in impurities retention and corrosion.
A scroll member is arranged in the housing, the scroll shaft of the scroll member is coaxial with the central axis of the housing, the first end of the scroll member is close to the inner wall of the housing, and the second end is coiled inward to form a scroll circle, and the tube bundle is arranged in the scroll circle, and the fluid enters the scroll circle through the first end of the scroll member, and heat exchanges with the tube bundle, and the second end of the scroll member is in communication with the central tube to ensure stable flow of fluid.
Improve space utilization, avoid impurities retention, ensure heat exchange efficiency and stable operation of equipment, and prevent corrosion.
Smart Images
Figure CN120368754A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of heat exchange equipment, and specifically provides a heat exchanger. Background Art
[0002] According to the working principle, heat exchangers can be divided into shell-and-tube heat exchangers, regenerative heat exchangers, and mixing heat exchangers. Among them, shell-and-tube heat exchangers are the most widely used due to the characteristics that the cold and hot fluids are separated from each other, do not mix, and heat exchange through the partition wall. The shell-and-tube heat exchanger is the most typical one among the shell-and-tube heat exchangers, mainly composed of a shell, a tube bundle, a tube sheet, a head, etc. One of the cold and hot fluids flows inside the tube, and its stroke is called the tube side; the other flows outside the tube and inside the shell, and its stroke is called the shell side. The wall surface of the tube bundle is the heat transfer surface. At present, a certain number of baffle plates are usually arranged in the shell. The baffle plates are usually straight plates and are arranged alternately up and down in the shell. By setting these baffle plates, fluid short-circuit can be prevented, the fluid velocity can be increased, the turbulence degree of the fluid can be increased, and thus the heat transfer coefficient of the fluid outside the tube can be improved, and the heat exchange efficiency of the shell-and-tube heat exchanger can be improved.
[0003] However, at present, the tube bundles of most shell-and-tube heat exchangers are usually arranged in the central area of the shell, and the space reserved around the shell is relatively large, and the space inside the shell cannot be effectively utilized. Moreover, due to the setting of the baffle plates, dead corners are easily generated, and impurities in the fluid in the shell side cannot be discharged, resulting in a decrease in performance and easy corrosion.
[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention
[0005] The present invention aims to solve the above technical problems, that is, to solve the problems in the prior art that the copper tubes of the shell-and-tube heat exchanger are usually distributed in the center of the cylinder, resulting in a large reserved space around and low utilization rate.
[0006] The present invention provides a heat exchanger, which includes a shell, a vortex member and a tube bundle arranged in the shell. The vortex axis of the vortex member is coaxially arranged with the central axis of the shell. The first end of the vortex member is arranged at a position close to the inner wall of the shell. The second end of the vortex member coils inward around the vortex axis to form a plurality of vortex circles. The fluid in the shell can enter the outermost vortex circle through the first end of the vortex member. The tube bundle is arranged in each vortex circle and extends along the direction of the vortex axis.
[0007] In a preferred technical solution of the above heat exchanger, at least one inlet is provided on the shell, and at least a part of the first end of the vortex member is aligned with the inlet, so as to guide the fluid entering the shell from the inlet to the outermost vortex circle through the first end of the vortex member.
[0008] In the preferred technical solution of the above heat exchanger, a plurality of the inlets are provided on the housing, and the connection line of the center points of at least a part of the plurality of inlets is parallel to the central axis.
[0009] In the preferred technical solution of the above heat exchanger, the heat exchanger further includes a central pipe, the central pipe includes a central pipe body, an outlet is provided on the housing, the central pipe body is communicated with the outlet, the central pipe body is arranged at a position in the housing close to the second end of the vortex member, the central pipe body extends along the direction of the vortex axis, and a communication structure is provided on the central pipe body to allow the fluid coming out of the second end of the vortex member to enter the central pipe body through the communication structure and then flow out of the housing through the outlet.
[0010] In the preferred technical solution of the above heat exchanger, the communication structure is an opening, and at least a part of the opening extends along the direction of the vortex axis.
[0011] In the preferred technical solution of the above heat exchanger, the opening is arranged at a position close to the second end of the vortex member. When observed along the water flow direction, the opening is arranged on the downstream side of the second end of the vortex member.
[0012] In the preferred technical solution of the above heat exchanger, the second end of the vortex member is connected to the outer wall of the central pipe body on the upstream side of the opening. The opening has a first side and a second side which are oppositely arranged. The first side is arranged at a position close to the connection part, and the second side is connected to a part of the vortex member close to the central axis to guide the fluid coming out of the second end of the vortex member to the opening.
[0013] In the preferred technical solution of the above heat exchanger, the vortex member is formed by coiling two oppositely arranged plate-like structures, and the tube bundle is arranged between the two plate-like structures.
[0014] In the preferred technical solution of the above heat exchanger, when observed along the water flow direction, the second end of the outer plate-like structure is located on the downstream side of the second end of the inner plate-like structure. The second end of the inner plate-like structure is connected to the outer wall of the central pipe body, and a part of the outer plate-like structure close to its second end is connected to the second side.
[0015] In the preferred technical solution of the above heat exchanger, the central pipe further includes a water outlet pipe. The first end of the water outlet pipe is connected to the end of the central pipe body, and the second end of the water outlet pipe extends to the outside of the housing after passing through the outlet.
[0016] In the technical solution of the present invention, the heat exchanger includes a housing, a scroll member, and a tube bundle. The scroll member and the tube bundle are disposed inside the housing. The scroll axis of the scroll member is coaxially arranged with the central axis of the housing. The first end of the scroll member is disposed at a position close to the inner wall of the housing, and the second end winds inward around the scroll axis to form a plurality of scroll circles. The tube bundle is disposed within each scroll circle and extends along the direction of the scroll axis. That is to say, the scroll member forms a plurality of scroll circles radially distributed along the housing inside the housing, and the tube bundle is distributed in each scroll circle, so that the tube bundle can be filled in the housing radially. In this way, there is basically no idle space inside the housing, and thus the space inside the housing can be fully utilized, and the space utilization rate is high. The fluid entering the housing can enter the scroll circle through the first end of the scroll member and exchange heat with the fluid in the tube bundle disposed in the scroll circle. That is to say, the fluid inside the housing flows along the scroll circle and exchanges heat with the fluid in the tube bundle during the flow process. In this way, a good heat exchange efficiency can be obtained and there is no dead angle. Even if the fluid carries impurities, the impurities can flow out of the housing along with the fluid, thereby ensuring the heat exchange efficiency of the heat exchanger and avoiding corrosion of the components of the heat exchanger caused by the retention of impurities.
[0017] Further, at least one inlet is provided on the housing, and at least a part of the first end of the scroll member is aligned with the inlet. In this way, the fluid entering the housing through the inlet can be directly guided to the outermost scroll circle, and then flow along each scroll circle to the second end of the scroll member, and fully exchange heat with the fluid in the tube bundle disposed in each scroll circle, ensuring the heat exchange efficiency of the heat exchanger.
[0018] Further, the heat exchanger further includes a central tube body, which is communicated with the outlet provided on the housing. The central tube body is disposed at a position close to the second end of the scroll member and extends along the direction of the scroll axis. That is to say, the central tube body is disposed at a position close to the center of the scroll member and is arranged in the same direction as the tube bundle. A communication structure is provided on the central tube body. In this way, the fluid coming out of the second end of the scroll member can enter the central tube body through the communication structure and then flow out of the housing through the outlet. Through such a setting, the fluid coming out of the second end of the scroll member can flow out of the housing in time through the central tube body and the outlet, ensuring the stable flow of the fluid inside the housing, and further ensuring the stable operation of the heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings:
[0020] Figure 1 is a structural diagram of a heat exchanger according to an embodiment of the present invention;
[0021] Figure 2 is a structural diagram (one) of the heat exchanger according to an embodiment of the present invention after removing the housing;
[0022] Figure 3 It is the structure diagram (II) of the heat exchanger of an embodiment of the present invention after removing the housing;
[0023] Figure 4 It is Figure 3 the sectional view of the B-B plane in
[0024] Figure 5 the structure diagram of the central tube of an embodiment of the present invention.
[0025] List of reference numerals:
[0026] 1. Housing; 11. Inlet; 2. Vortex member; 21. First end of the vortex member; 22. Second end of the vortex member; 23. Inner plate-like structure; 24. Outer plate-like structure; 3. Heat exchange tube; 4. Central tube; 41. Central tube body; 411. Opening; 4111. First side; 4112. Second side; 42. Water outlet pipe; 5. Support structure. Detailed implementation manners
[0027] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.
[0028] It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0029] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "connected" and "joined" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0030] Since the tube bundles of most of the existing shell-and-tube heat exchangers are usually arranged in the central area of the shell, a relatively large space is reserved around the shell, and the space inside the shell cannot be effectively utilized. Moreover, due to the arrangement of the baffles, dead corners are likely to be generated, and impurities in the fluid in the shell side cannot be discharged, resulting in a decline in performance and easy corrosion. Therefore, the heat exchanger of the present application can effectively utilize the space inside the shell by arranging a vortex member in the shell and arranging the tube bundle in each vortex ring of the vortex member, has a good heat exchange efficiency, and has no dead corners, so that while ensuring the heat exchange efficiency, the space utilization rate can be improved.
[0031] The following will describe possible implementation manners of the heat exchanger of the present invention with reference to Figures 1 to 5 to elaborate.
[0032] As Figures 1 to 4 shown, the heat exchanger includes a shell 1, a vortex member 2 and a tube bundle. The shell 1 is generally a cylindrical structure with both ends closed. The vortex axis of the vortex member 2 is coaxially arranged with the central axis of the shell 1. The first end 21 of the vortex member is arranged at a position close to the inner wall of the shell 1, and the second end winds inward around the vortex axis to form a plurality of vortex rings. That is to say, the vortex member 2 forms a plurality of vortex rings distributed radially along the shell 1 inside the shell 1, and these vortex rings are arranged in sequence along the radial direction of the shell 1. The tube bundle includes a plurality of heat exchange tubes 3. Both ends of these heat exchange tubes 3 are respectively communicated with the outside, so as to allow the fluid to be heat-exchanged (such as refrigerant, etc.) to enter the heat exchange tubes 3 from one end of the heat exchange tubes 3 and flow out from the other end of the heat exchange tubes 3 after heat exchange. The plurality of heat exchange tubes 3 are evenly distributed in each vortex ring. When installed, the heat exchange tubes 3 extend along the direction of the vortex axis, that is, along the central axis direction of the shell 1. In this way, the inside of the shell 1 is basically filled with the vortex member 2 and the heat exchange tubes 3 arranged in the vortex rings, and there is basically no idle space, so that the space inside the shell 1 can be fully utilized, and the space utilization rate is high. The fluid entering the shell 1 can enter the vortex ring through the first end 21 of the vortex member, and then respectively exchange heat with the fluid in the heat exchange tubes 3 arranged in the vortex ring. That is to say, the fluid in the shell 1 flows along the vortex ring and exchanges heat with the fluid in each heat exchange tube 3 one by one during the flow process. In this way, the contact time between the fluid in the shell 1 and the heat exchange tubes 3 can be increased, and a good heat exchange efficiency can be obtained. Moreover, since the vortex ring is circular and has a smooth curved surface without dead corners, even if the fluid carries impurities, it can flow out of the shell 1 together with the fluid, so as to avoid corrosion of the shell 1 due to the retention of impurities. Through such an arrangement, while ensuring the heat exchange efficiency, the space utilization rate can be improved, and the retention of impurities can be avoided.
[0033] It should be noted that the heat exchange tube 3 can be a straight tube or a tube segment with other possible shapes such as U-shaped or wavy. Those skilled in the art can flexibly select the specific shape of the heat exchange tube 3 according to the specific application scenario, as long as it can be arranged within the vortex circle and meet the requirement of heat exchange between the fluid in the heat exchange tube 3 and the fluid within the vortex circle.
[0034] It should be noted that the directions of the vortex axis and the central axis of the housing 1 are generally Figure 4 in the direction perpendicular to the paper plane in
[0035] As Figures 1 to 4 shown, two inlets 11 are provided on the housing 1, and water inlet pipes are provided at the inlets 11. The two inlets 11 are provided on the side wall of the housing 1 and are generally circular. The connection line of the centers of the two inlets 11 is parallel to the central axis. That is to say, the two inlets 11 are distributed along the direction of the central axis of the housing 1. The first end 21 of the vortex member is aligned with the inlet 11, so that the fluid (such as water, etc.) entering the housing 1 through the inlet 11 can enter the outermost vortex circle of the vortex member 2 in the first time, and then flow along each vortex circle to the second end 22 of the vortex member, and fully exchange heat with the fluid in the heat exchange tubes 3 arranged in each vortex circle, ensuring the heat exchange efficiency of the heat exchanger. Through such an arrangement, the fluid entering the housing 1 through the inlet 11 can enter the outermost vortex circle, effectively avoiding the situation that the fluid first enters the gap between the housing 1 and the vortex member 2 and then enters the vortex circle, resulting in a slowdown in the fluid velocity, or even forming a stagnant area between the housing 1 and the vortex member 2, and further affecting the heat exchange efficiency. Thus, the heat exchange efficiency of the heat exchanger can be better ensured.
[0036] It should be noted that three or four or more inlets 11 can also be provided on the housing 1. In this case, the connection line of the center points of at least a part of the inlets 11 is parallel to the central axis. Of course, only one inlet 11 can also be provided on the housing 1. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the number of inlets 11 provided on the housing 1 according to the specific application scenario, as long as the inlet 11 at least aligns with a part of the first end 21 of the vortex member and the fluid entering the housing 1 through the inlet 11 can enter the outermost vortex circle through the first end 21 of the vortex member.
[0037] As Figures 1 to 5As shown, an outlet is further provided on the housing 1, and the outlet is provided at the center of the end face of the housing 1. The heat exchanger further includes a central tube body 41, which is generally in a cylindrical structure and communicates with the outlet. It is arranged inside the housing 1 near the second end 22 of the vortex member. The central tube body 41 extends along the direction of the vortex axis. That is to say, the central tube body 41 is arranged near the center of the vortex member 2 and is arranged in the same direction as the tube bundle. A communication structure is provided on the central tube body 41, so that the fluid coming out from the second end 22 of the vortex member can enter the central tube body 41 through this communication structure and then flow out of the housing 1 through the outlet. Through such an arrangement, the fluid coming out from the second end 22 of the vortex member can flow out of the housing 1 in time through the central tube body 41 and the outlet, ensuring the stable flow of the fluid in the housing 1 and thus ensuring the stable operation of heat exchange.
[0038] It should be noted that the central tube body 41 may not be provided in the heat exchanger. In this case, the fluid directly flows to the outlet through the center of the vortex member 2 after coming out from the second end 22 of the vortex member.
[0039] Continue to refer to Figures 1 to 5 , the vortex member 2 is formed by coiling two oppositely arranged plate-like structures, and each heat exchange tube 3 is arranged between the two plate-like structures. When observing along the water flow direction, the first ends of the outer plate-like structure 24 and the inner plate-like structure 23 are arranged side by side near the housing 1, and the second end of the outer plate-like structure 24 is located on the downstream side of the second end of the inner plate-like structure 23. That is to say, the length of the outer plate-like structure 24 is greater than that of the inner plate-like structure 23. The second end of the outer plate-like structure 24 bypasses the second end of the inner plate-like structure 23 and then coils half a turn around the vortex axis. The part of the outer plate-like structure 24 bypassing the second end of the inner plate-like structure 23 is close to the central axis of the housing 1.
[0040] The connection structure is an opening 411, which is arranged at a position close to the second end 22 of the scroll member and extends along the direction of the scroll axis. The opening 411 has a first side 4111 and a second side 4112 arranged opposite to each other. The second end of the inner plate-like structure 23 is connected to the outer wall of the central tube body 41, which is located on the upstream side of the opening 411 and close to the first side 4111. The second side 4112 is connected to a part of the outer plate-like structure 24 close to its second end. In this way, a relatively enclosed space is formed at a position close to the second end 22 of the scroll member. The heat-exchanged fluid coming out from the second end 22 of the scroll member can directly enter the central tube body 41 through the opening 411, and will not flow to other areas inside the scroll member 2. The heat-exchanged fluid inside the housing 1 can then flow out of the housing 1 through the central tube body 41 and the outlet in a timely manner, ensuring the stable flow of the fluid inside the housing 1, and further ensuring the stable operation of heat exchange and heat exchange efficiency. At the same time, since the fluid flows along the curved scroll loop all the way, a certain centrifugal force will be formed inside the central tube body 41. Under the action of this centrifugal force, the impurities in the fluid are collected inside the central tube body 41 and then flow out of the housing 1 with the fluid, without staying inside the scroll member 2 or adhering to the heat exchange tube 3, avoiding the corrosion and damage of the scroll member 2 or the heat exchange tube 3 caused by the retention of impurities.
[0041] It should be noted that the water flow direction is generally Figure 4 the clockwise direction in Figure 4 the dimension of the two plate-like structures along the water flow direction in
[0042] It should be noted that the connection structure can also be composed of a plurality of water inlet holes arranged along the length direction of the central tube body 41. The water inlet holes can be circular, rectangular, square, irregular or holes of other possible shapes. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the specific setting mode of the connection structure according to the specific application scenario, as long as the fluid coming out from the second end 22 of the scroll member can be guided to the outlet.
[0043] It should be noted that only a part of the opening 411 can be arranged along the length direction of the central tube body 41. Obviously, the opening 411 can also be arranged at other possible positions of the central tube body 41. For example, it can be arranged at the position of the central tube body 41 corresponding to the second end 22 of the scroll member. Of course, the second side 4112 of the opening 411 can also not be connected to the outer plate-like structure 24. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the specific setting form of the opening 411 according to the specific application scenario, as long as the fluid coming out from the second end 22 of the scroll member can be guided to the outlet through the opening 411.
[0044] It should be noted that the second ends of the two plate-like structures can also be flush. In this case, the second side 4112 of the opening 411 is connected to the position of the inner plate-like structure 23 near its second end. Of course, the scroll member 2 can also be formed by coiling only one plate-like structure. In this case, the second side 4112 of the opening 411 is connected to the part of the scroll member 2 near the central axis. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the specific setting form of the scroll member 2 according to the specific application scenario, as long as a plurality of scroll loops capable of accommodating the heat exchange tubes 3 can be formed.
[0045] As Figures 1 to 5 shown, an outlet is respectively provided on the two end faces of the housing 1. The central tube 4 further includes two water outlet pipes 42, which are respectively arranged at the two ends of the central tube body 41. One end of each water outlet pipe 42 is connected to the end of the central tube body 41, and the second end extends to the outside of the housing 1 after passing through the corresponding outlet provided on the housing 1. In this way, after the fluid after heat exchange enters the central tube body 41, it can flow out of the housing 1 through these two water outlet pipes 42.
[0046] It should be noted that it can also be that an outlet is provided only on one end face of the housing 1, and only one water outlet pipe 42 is provided at the corresponding end of the central tube body 41. Of course, the central tube 4 can also not include the water outlet pipe 42. In this case, the two ends of the central tube 4 are respectively abutted against the two end faces of the housing 1, and the fluid entering the central tube 4 directly flows out from the outlet.
[0047] As Figures 1 to 4 shown, a support structure 5 is further provided on the scroll member 2. The support structure 5 is generally a sheet-like structure. The support structures 5 are respectively provided at the corresponding positions on both sides of the inner plate-like structure 23 and the outer plate-like structure 24, and each support structure 5 is perpendicular to the inner plate-like structure 23 and the outer plate-like structure 24 respectively. When the scroll member 2 is coiled, a plurality of arc-shaped notches are respectively provided on the support structure 5 on the inner plate-like structure 23 facing the outer plate-like structure 24 and the support structure 5 on the outer plate-like structure 24 facing the inner plate-like structure 23. The arc-shaped notches on the two support structures 5 face each other, forming a generally circular hole-like structure. The heat exchange tubes 3 pass through the hole-like structure and are arranged in the scroll loop along the direction of the scroll axis. In this way, the arrangement of the heat exchange tubes 3 can be ensured, and the stability of the heat exchange tubes 3 can be ensured, thereby ensuring the stability of the heat exchanger structure. And, there is a gap between the support structure 5 on the inner plate-like structure 23 facing the outer plate-like structure 24 and the support structure 5 on the outer plate-like structure 24 facing the inner plate-like structure 23. When coiled, the gap forms an annular gap, so that it can better ensure the smooth flow of the fluid in the housing 1 and ensure the heat exchange efficiency of the heat exchanger. Of course, the support structure 5 can also not be provided in the housing 1.
[0048] It should be noted that the heat exchanger of the present invention can be widely applied to occasions that require heat exchange, such as air conditioners, water-cooled units, heat pump units, screw machines, etc. The specific types of the fluid in the housing 1 and the fluid in the heat exchange tubes 3 can be flexibly adjusted according to the application occasion, heat exchange requirements, etc.
[0049] In summary, in the preferred technical solution of the present invention, through the arrangement of the scroll member 2 and the arrangement of a plurality of heat exchange tubes 3 in the scroll circle formed by the winding of the scroll member 2, the space in the housing 1 can be effectively utilized, the heat exchange efficiency of the heat exchanger can be ensured, and the corrosion of the components of the heat exchanger caused by the retention of impurities can be avoided. Through the arrangement of the central tube body 41 communicated with the outlet, at least a part of the opening 411 provided on the central tube body 41 extends along the direction of the scroll axis, and the second side 4112 of the opening 411 is connected to the part of the scroll member 2 close to the central axis, so that the heat-exchanged fluid can be better guided into the central tube 4, ensuring the stable flow of the fluid in the housing 1, and further ensuring the stable operation and heat exchange efficiency of the heat exchange, and also effectively avoiding the corrosion and damage of the scroll member 2 or the heat exchange tubes 3 caused by the retention of impurities.
[0050] Of course, the above-mentioned alternative embodiments can be used in cross-combination with each other, and also in cross-combination with the alternative embodiments and the preferred embodiments, so as to combine new embodiments to be applicable to more specific application scenarios.
[0051] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims of the present invention, any one of the claimed embodiments can be used in any combination.
[0052] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.
Claims
1. A heat exchanger, characterized in that, The heat exchanger includes a housing, a scroll member, and a tube bundle disposed within the housing. The scroll axis of the scroll member is coaxially arranged with the central axis of the housing. The first end of the scroll member is disposed near the inner wall of the housing, and the second end of the scroll member coils inwardly around the scroll axis to form a plurality of scroll circles. The fluid within the housing can enter the outermost scroll circle through the first end of the scroll member, and the tube bundle is disposed within each scroll circle and extends along the direction of the scroll axis.
2. The heat exchanger according to claim 1, wherein At least one inlet is provided on the housing, and at least a part of the first end of the scroll member is aligned with the inlet so as to guide the fluid entering the housing from the inlet to the outermost scroll circle through the first end of the scroll member.
3. The heat exchanger according to claim 2, characterized in that, A plurality of inlets are provided on the housing, and the connection line of the center points of at least a part of the plurality of inlets is parallel to the central axis.
4. The heat exchanger according to any one of claims 1 to 3, characterized in that, The heat exchanger further includes a central tube, which includes a central tube body. An outlet is provided on the housing, and the central tube body is in communication with the outlet. The central tube body is disposed within the housing near the second end of the scroll member and extends along the direction of the scroll axis. A communication structure is provided on the central tube body to allow the fluid exiting from the second end of the scroll member to enter the central tube body through the communication structure and then flow out of the housing through the outlet.
5. The heat exchanger according to claim 4, characterized in that, The communication structure is an opening, and at least a part of the opening extends along the direction of the scroll axis.
6. The heat exchanger according to claim 5, characterized in that, The opening is disposed near the second end of the scroll member. When observing along the water flow direction, the opening is disposed on the downstream side of the second end of the scroll member.
7. The heat exchanger according to claim 6, characterized in that, The second end of the scroll member is connected to the outer wall of the central tube body on the upstream side of the opening. The opening has a first side and a second side disposed opposite to each other. The first side is disposed near the connection point, and the second side is connected to the part of the scroll member near the central axis so as to guide the fluid exiting from the second end of the scroll member to the opening.
8. The heat exchanger according to claim 7, wherein, The scroll member is formed by coiling two oppositely disposed plate-like structures, and the tube bundle is disposed between the two plate-like structures.
9. The heat exchanger according to claim 8, characterized in that, When observing along the water flow direction, the second end of the outer plate-like structure is located on the downstream side of the second end of the inner plate-like structure. The second end of the inner plate-like structure is connected to the outer wall of the central tube body, and the part of the outer plate-like structure near its second end is connected to the second side.
10. The heat exchanger according to claim 4, characterized in that, The central tube further includes a water outlet pipe. The first end of the water outlet pipe is connected to the end of the central tube body, and the second end of the water outlet pipe extends to the outside of the housing after passing through the outlet.