Bent U-shaped heat exchange device integrating multiple heat exchange units

Abstract

The utility model belongs to the technical field of heat exchangers, particularly relates to a bent U-shaped heat exchange device integrating multiple heat exchange units, and solves the problem that high heat exchange efficiency cannot be realized in a small installation space. The bent U-shaped heat exchange device integrating the multiple heat exchange units comprises at least two plate-shaped heat exchange units which are arranged in a stacked mode, each heat exchange unit comprises a dry cooler and a condenser, each heat exchange unit is bent to be in a U shape, and a detachable fixing structure is arranged between side plates of the heat exchange units. The heat exchanger can be installed in a narrow space and has high heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and specifically relates to a U-shaped heat exchange device with multiple integrated and bent heat exchange units. Background Technology

[0002] A heat exchanger is a device that uses microchannel technology to achieve temperature control. A heat exchange medium flows through it, and the medium exchanges heat with the air through the flat tube wall during the flow process.

[0003] In existing technologies, multiple heat exchange units may be integrated to improve the adjustment range of heat exchange efficiency. However, the more heat exchange units there are, the higher the requirements for installation space, making it impossible to achieve efficient heat exchange in a small space. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a U-shaped heat exchange device that integrates multiple heat exchange units and is bent.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A U-shaped heat exchange device integrating multiple heat exchange units and bent, comprising at least two stacked plate-shaped heat exchange units, each heat exchange unit including a dry cooler and a condenser, the heat exchange units being bent into a U-shape, and a detachable fixing structure being provided between the side plates of the heat exchange units.

[0007] The heat exchanger of this utility model integrates multiple heat exchange units, specifically a dry cooler and a condenser. It can select to activate some or all of the heat exchange units according to actual usage needs, achieving a wide range of heat exchange efficiency adjustment. Moreover, the heat exchange units of this heat exchanger are bent into a U-shape, which can adapt to narrow installation spaces, effectively providing three heat exchange surfaces and maximizing the heat exchange area. The heat exchange units are connected by a detachable fixing structure, ensuring flexibility in disassembly and assembly.

[0008] In the aforementioned U-shaped heat exchange device with multiple integrated and bent heat exchange units, both the dry cooler and the condenser include two parallel manifolds. Several flat tubes bent into a U-shape and two side plates are arranged at intervals between the manifolds. The flat tubes are located between the two side plates, and the detachable fixing structure is set between adjacent side plates.

[0009] The dry cooler and condenser have similar main structures, both consisting of manifolds and flat tubes between them. Microchannels are formed inside the flat tubes, which are connected to the manifolds. The heat exchange medium is connected between the manifolds and the microchannels, and can exchange heat with the air through the flat tube walls. This is common knowledge. Side plates are provided on the outside of the flat tube assembly. The two ends of the side plates are connected to the manifolds, which have good structural strength and can also protect the flat tubes between them. The detachable fixing structure is achieved by connecting the side plates of adjacent heat exchange units to fix the connection between the two heat exchange units.

[0010] In the aforementioned U-shaped heat exchanger device with multiple heat exchange units integrated and bent, the detachable fixing structure includes a side plate located on the side of the side plate away from the flat tube. The side plate is fixedly connected to the adjacent side plate by a rivet structure or a bolt structure. The side plate is located at both ends and / or the middle position of the side plate.

[0011] The width of the side plate is greater than twice the width of the edge plate. Adjacent edge plates are simultaneously connected to this side plate for relative fixation. The connection between them is achieved through a riveting or bolting structure, ensuring flexible disassembly. Furthermore, the side plates are only located at both ends and in the middle, providing good structural strength. Adjacent side plates form channels communicating with the gaps between them and the heat exchange unit, allowing air to enter and exit, thus improving airflow rate and consequently heat exchange efficiency. The riveting and bolting structures are common knowledge and will not be elaborated upon further.

[0012] In the aforementioned U-shaped heat exchanger device with multiple heat exchange units integrated and bent, the side plate includes a first straight section at both ends and a second straight section in the middle. The first straight section and the second straight section are arranged perpendicularly and connected to each other by an arc-shaped bending section. The side plate is connected to the adjacent first straight section and the adjacent second straight section respectively.

[0013] The side plate is U-shaped, with straight sections at both ends and in the middle. The bent sections connect the adjacent straight sections, and the side plate is set between these straight sections. The straight shape also makes it easier to match shapes and facilitates processing.

[0014] In the above-mentioned U-shaped heat exchange device with multiple heat exchange units integrated and bent, at least one side plate is provided with an extension connection surface, the extension connection surface extends to the inner side of the inner heat exchange unit and / or the outer side of the outer heat exchange unit, and the extension connection surface is provided with a first connection hole.

[0015] The side plate has at least one vent distributed along its length, and the vent is located between two adjacent side plates.

[0016] The extended connecting surfaces on the side plates extend inwards or outwards. The first connecting hole on the extended connecting surface allows for connection with the corresponding mounting part or matching component via bolts. The side plates and flat tubes are located outside the extension direction of the first connecting holes, facilitating the installation of bolts in the first connecting holes. The vents on the side plates are located between the top and bottom edges of adjacent side plates, communicating with the gap between them and the heat exchange unit, allowing air to pass through and improving heat exchange efficiency.

[0017] In the aforementioned U-shaped heat exchanger device with multiple integrated and bent heat exchange units, the inner diameter of the bent sections of adjacent heat exchange units is the same, the spacing between adjacent first straight sections is the same, and the spacing between adjacent bent sections is greater than the spacing between the first straight sections.

[0018] Since no side plates are installed between the bends, air is allowed to pass between them. The inner diameters of adjacent bends are the same, which makes the gap between two bends larger than the gap between the straight sections connected to them. This increases the size of the gap that air can pass through, which is beneficial to further improving heat exchange efficiency.

[0019] In the aforementioned U-shaped heat exchanger device with multiple integrated and bent heat exchange units, one or both sides of the bent section of the side plate are provided with side openings, which are evenly arranged along the arc length direction of the bent section.

[0020] The side of the edge plate has an opening, which can be triangular, quadrilateral, arc-shaped, or other shapes. The opening facilitates bending and avoids twisting and deformation.

[0021] In the aforementioned U-shaped heat exchanger device with integrated and bent multiple heat exchange units, a first connecting platform and a second connecting platform are respectively provided on the manifolds of adjacent heat exchange units. The cross-section of the first connecting platform is H-shaped, including an arc-shaped part and a straight part. The arc-shaped part is attached to and welded to the manifold. The cross-section of the second connecting platform is U-shaped, with an arc-shaped surface on one side. The arc-shaped surface is attached to and welded to the manifold. The top surface of the second connecting platform is in close contact with the bottom surface of the straight part. A tubular support column is horizontally placed inside the second connecting platform. The two ends of the support column abut against the two inner sides of the second connecting platform. A second connecting hole is provided through the straight part and the second connecting platform. Fixing bolts are inserted through the second connecting hole and the support column.

[0022] A connecting platform is provided on the side of the manifold away from the flat tube. The opposing surfaces of the first and second connecting platforms of the two heat exchange units are flat and tightly fitted. The first connecting platform is H-shaped, with the inner diameter of its arc portion matching the outer diameter of the manifold. The arc portion fits against the outer wall of the manifold and is fixed as a single structure by welding. The second connecting platform is U-shaped, hollow inside, which is beneficial for weight reduction and material cost reduction. It also makes the side of the second connecting platform away from the first connecting platform flush with the manifold, which is beneficial for fitting onto the corresponding mounting plane. The hollow direction of the second connecting platform matches the length direction of the manifold. An arc surface is formed on its side outer wall, which fits against the outer wall of the manifold. A flat fitting surface is formed on the top surface. The fitting surfaces of the first and second connecting platforms are tightly fitted. Fixing bolts pass through the second connecting holes on the two connecting platforms and are tightened with nuts to achieve a fixed connection between the first and second connecting platforms. The fixing bolts can also pass through the corresponding mounting plane to achieve the installation purpose. The support column is positioned between the top and bottom surfaces, increasing structural strength and preventing deformation and closure of the top and bottom surfaces when tightening the fixing bolts and nuts. Furthermore, the support column also encloses the screw rods within the second connecting platform, preventing dust and debris from covering them and ensuring that the fixing bolts can be easily tightened.

[0023] As an optimization, matching concave and convex surfaces can be provided on the two mating surfaces. The concave and convex parts of the two surfaces fit together perfectly, which has the effect of positioning and anti-slip. The concave and convex parts can be in the form of a broken line cross section, or a wave-shaped cross section, or a complementary annular groove and an annular protrusion.

[0024] In the above-mentioned U-shaped heat exchange device with multiple heat exchange units integrated and bent, the manifold of the dry cooler is provided with a discharge valve seat, the discharge valve seat is provided with a discharge channel communicating with the manifold cavity of the manifold, and a plug is detachably provided on the discharge port at the outer end of the discharge channel.

[0025] The plug is T-shaped and includes an integrally connected large-head screwing part and a round rod part. The round rod part engages with the internal thread in the discharge port through its threaded section.

[0026] The round rod portion includes a threaded section at the front end and a reduced diameter section at the rear end, and an air pressure balance channel is provided between the side wall of the reduced diameter section and the front end face of the threaded section.

[0027] The outer diameter of the threaded section is adapted to the inner diameter of the discharge port, but is larger than the outer diameter of the reduced diameter section;

[0028] The inner end face of the large-head screwing part is provided with an annular groove, and a sealing ring is provided in the annular groove. The sealing ring is in contact with the end face of the discharge valve seat.

[0029] A discharge channel is formed in the discharge valve seat on the manifold of the dry cooler, which can be used for venting or draining liquid. The discharge port of the discharge channel is sealed by a plug, which is similar to a bolt with a T-shaped axial cross section. The threaded section of the round rod engages with the thread of the discharge port, ensuring flexible disassembly. Furthermore, to enable the rotation of the plug, the large-end screwing part is hexagonal, and / or, the outer end face of the large-end screwing part is provided with an internal hexagonal hole, cross hole, or slotted hole, which can be used to rotate the plug with a corresponding wrench or screwdriver. The first half of the round rod is a threaded section, and the second half is a reduced-diameter section with a smaller outer diameter. An annular gap is formed between the reduced-diameter section and the discharge port. The air pressure balance channel connects the side wall of the reduced-diameter section and the front end face of the threaded section, that is, it connects the annular gap and the manifold, so that when the plug is screwed in or out, especially before the inner end face of the large head comes into contact with the end face of the tubular base, air can enter and exit through the air pressure balance channel to achieve internal and external air pressure balance, which facilitates disassembly and assembly. Specifically, the reduced diameter section has an external air pressure balance hole on its side wall, and the threaded section has an internal air pressure balance hole on its end face. The internal air pressure balance hole and the external air pressure balance hole are connected to form an air pressure balance channel. A sealing ring is provided on the inner side of the large-end turning part. This sealing ring is tightly attached to the end face of the discharge valve seat to achieve circumferential sealing between the discharge valve seat and the large-end turning part.

[0030] In the aforementioned U-shaped heat exchanger device with multiple integrated and bent heat exchange units, the manifold of the dry cooler is provided with an inlet and outlet pipe connection seat, and the outer end of the inlet and outlet pipe connection seat is provided with a flange-type quick connector or a chuck-type quick connector for connecting the inlet and outlet liquid pipes; the manifold of the condenser is connected with inlet and outlet pipes.

[0031] The inlet and outlet pipe connectors on the manifold of the dry cooler are connected to the inlet and outlet liquid pipes via quick-connect couplings, enabling quick assembly and disassembly of the inlet and outlet liquid pipes. These quick-connect couplings can be flange-type or chuck-type. Specifically, the flange-type quick-connect coupling is annular, with a mating interface at its bottom. The end of the inlet and outlet pipe connector is inserted into the mating interface and welded in place. The end face of the inlet and outlet pipe connector abuts against the annular stepped surface inside the mating interface. The outer end of the flange-type quick-connect coupling has an annular protrusion that mates with the matching free connector of the inlet and outlet liquid pipes. The flange portion of the flange quick-connect coupling and the flange portion of the free connector are fixed together with bolts, and a sealing ring is provided between the end faces of the flange quick-connect coupling and the free connector.

[0032] Compared with the prior art, the heat exchanger of this utility model integrates multiple heat exchange units, and can select to open some or all of the heat exchange units according to actual use needs, so as to achieve a wide range of heat exchange efficiency adjustment. Moreover, the heat exchange units of this heat exchanger are bent into a U-shape, which can adapt to narrow installation space, which is equivalent to having three heat exchange surfaces, thereby maximizing the heat exchange area. The heat exchange units are connected by a detachable fixing structure, ensuring the flexibility of disassembly and assembly. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;

[0034] Figure 2 yes Figure 1 Enlarged detail view of point A in the middle;

[0035] Figure 3 This is a left-view schematic diagram provided by this utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the first connecting platform and the second connecting platform provided by this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the plug provided by this utility model.

[0038] In the diagram, the components are: 1. Dry cooler; 2. Condenser; 3. Side plate; 4. Detachable fixing structure; 5. Manifold; 6. Flat tube; 7. Side plate; 8. First straight section; 9. Second straight section; 10. Bending section; 11. Extended connecting surface; 12. First connecting hole; 13. Vent; 14. Side opening; 15. First connecting platform; 16. Second connecting platform; 17. Arc-shaped part; 18. Straight part; 19. Support column; 20. Second connecting hole; 22. Discharge valve seat; 23. Plug; 24. Large end tightening part; 25. Round rod part; 26. Threaded section; 27. Reduced diameter section; 28. Pressure balance channel; 29. ​​Annular groove; 30. External pressure balance hole; 31. Internal pressure balance hole; 32. Inlet / outlet pipe connecting seat; 34. Flange type quick connector; 35. Inlet / outlet pipe. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0040] Specific implementation examples Figure 1-5 As shown, this U-shaped heat exchange device with multiple integrated and bent heat exchange units includes two stacked plate-shaped heat exchange units. Each heat exchange unit includes a dry cooler 1 and a condenser 2. The heat exchange units are bent into a U-shape. Both the dry cooler 1 and the condenser 2 include two parallel manifolds 5. Several flat tubes 6 bent into U-shapes and two side plates 3 are arranged at intervals between the manifolds 5. The flat tubes 6 are located between the two side plates. A detachable fixing structure 4 is set between adjacent side plates 3.

[0041] Specifically, this heat exchanger integrates two heat exchange units: a dry cooler 1 and a condenser 2. It can select to activate some or all of the heat exchange units according to actual usage needs, achieving a wide range of heat exchange efficiency adjustment. Moreover, the heat exchange units of this heat exchanger are bent into a U-shape, which can adapt to narrow installation spaces, effectively providing three heat exchange surfaces and maximizing the heat exchange area. The heat exchange units are connected by a detachable fixing structure 4, ensuring flexibility in disassembly and assembly. The dry cooler 1 and the condenser 2 have similar main structures, both consisting of a manifold 5 and a flat tube 6 between them. A microchannel is formed inside the flat tube 6, which is connected to the manifold cavity of the manifold 5. The corresponding heat exchange medium is connected between the manifold cavity and the microchannel, and can exchange heat with the air through the tube wall of the flat tube 6. This is common knowledge. A side plate 3 is provided on the outside of the flat tube 6 group. The two ends of the side plate 3 are connected to the manifold 5, which has good structural strength and can also protect the flat tubes 6 between them. The detachable fixing structure 4 is to connect and fix the two heat exchange units by connecting the side plate 3 of the adjacent heat exchange units.

[0042] like Figure 1 , 2 As shown, the detachable fixing structure 4 includes a side plate 7 located on the side of the side plate 3 away from the flat tube 6. The side plate 7 is fixedly connected to the adjacent side plate 3 by a rivet structure. The side plate 7 is located at both ends and the middle of the side plate 3. The side plate 3 includes a first straight section 8 located at both ends and a second straight section 9 located in the middle. The first straight section 8 and the second straight section 9 are arranged perpendicularly and connected by an arc-shaped bending section 10. The side plate 7 connects the adjacent first straight section 8 and the adjacent second straight section 9 respectively. The inner diameter of the bending section 10 of adjacent heat exchange units is the same. The distance between adjacent first straight sections 8 and the distance between adjacent second straight sections 9 are the same. The distance between adjacent bending sections 10 is greater than the distance between first straight sections 8. An opening 14 is provided on one or both sides of the bending section 10 of the side plate 3. The openings 14 are evenly arranged along the arc length direction of the bending section 10.

[0043] Specifically, the width of the side plate 7 is greater than twice the width of the side plate 3. Adjacent side plates 3 are simultaneously connected to the side plate 7 for relative fixation. The connection between them is achieved through a riveting or bolting structure, ensuring flexible disassembly. Furthermore, the side plates 7 are only located at both ends and in the middle, providing good structural strength. A channel is formed between adjacent side plates 7, communicating with the gap between the heat exchange unit. Air can enter and exit through this channel, helping to improve airflow rate and thus heat exchange efficiency. The side plate 3 is U-shaped, with straight sections at both ends and in the middle. Bending sections 10 connect adjacent straight sections, and the side plates 7 are located between these straight sections. The straight shape also facilitates shape matching and processing. Since no side plates 7 are located between the bending sections 10, air can pass through them. The inner diameter of adjacent bending sections 10 is the same, making the gap between two bending sections 10 larger than the gap of the connected straight sections, increasing the gap size that air can pass through and further improving heat exchange efficiency. The side of the side plate 3 is provided with a side opening 14, which is semi-elliptical. The side opening 14 is designed to facilitate bending and avoid twisting and deformation.

[0044] As an optimization of this embodiment, an extended connecting surface 11 is provided on one side plate 7, the extended connecting surface 11 extends into the inner side of the inner heat exchange unit, and a first connecting hole 12 is provided on the extended connecting surface 11; a plurality of vents 13 are distributed along the length direction on the side plate 7, and the vents 13 are located between two adjacent side plates 3.

[0045] Specifically, the extended connecting surface 11 on the side plate 7 extends inward, and the first connecting hole 12 on the extended connecting surface 11 can be connected to the corresponding mounting part or matching component by bolts. The side plate 3 and the flat tube 6 are located outside the extension direction of the first connecting hole 12, which facilitates the setting of bolts on the first connecting hole 12. The vent 13 on the side plate 7 is located between the top and bottom edges of the adjacent side plate 3, and it communicates with the gap between the heat exchange unit, allowing air to pass through and improving heat exchange efficiency.

[0046] like Figure 1-4 As shown, a first connecting platform 15 and a second connecting platform 16 are respectively provided on the manifold 5 of adjacent heat exchange units. The cross-section of the first connecting platform 15 is H-shaped, including an arc-shaped part 17 and a straight part 18. The arc-shaped part 17 is attached to the manifold 5 and welded to it. The cross-section of the second connecting platform 16 is U-shaped, with an arc-shaped surface on one side. The arc-shaped surface is attached to the manifold 5 and welded to it. The top surface of the second connecting platform 16 is in close contact with the bottom surface of the straight part 18. A tubular support column 19 is horizontally placed inside the second connecting platform 16. The two ends of the support column 19 abut against the two inner surfaces of the second connecting platform 16. A second connecting hole 20 is provided through the straight part 18 and the second connecting platform 16. Fixing bolts are inserted through the second connecting hole 20 and the support column 19.

[0047] Specifically, a connecting platform is provided on the side of the manifold 5 away from the flat tube 6. The opposing surfaces of the first connecting platform 15 and the second connecting platform 16 of the two heat exchange units are flat mating surfaces, and the two mating surfaces are in close contact. The first connecting platform 15 is H-shaped, with the inner diameter of its arc-shaped portion 17 matching the outer diameter of the manifold 5. The arc-shaped portion 17 fits against the outer wall of the manifold 5 and is fixed as an integral structure by welding. The second connecting platform 16 is U-shaped, hollow inside, which is beneficial for weight reduction and material cost reduction. At the same time, the side of the second connecting platform 16 away from the first connecting platform 15 is flush with the manifold 5, which is beneficial for fitting against the corresponding mounting plane. The hollow direction of the second connecting platform 16 matches the length direction of the manifold 5. An arc-shaped surface is formed on its outer side wall, which fits against the outer wall of the manifold 5. A flat fitting surface is formed on the top surface. The fitting surfaces of the first connecting platform 15 and the second connecting platform 16 are tightly attached. Fixing bolts pass through the second connecting holes 20 on the two connecting platforms and are tightened with nuts to achieve a fixed connection between the first connecting platform 15 and the second connecting platform 16. The fixing bolts can also pass through the corresponding mounting plane to achieve the installation purpose. The support column 19 is positioned between the top and bottom surfaces, increasing structural strength and preventing deformation and closure of the top and bottom surfaces when the fixing bolts and nuts are tightened. Furthermore, the support column 19 also encloses the screw rod within the second connecting platform 16, preventing dust and debris from covering it and ensuring that the fixing bolts can be easily unscrewed.

[0048] As a further optimization, matching concave and convex surfaces can be provided on the two mating surfaces. The concave and convex parts of the two surfaces fit together perfectly, providing positioning and anti-slip effects. The concave and convex parts can be in the form of a broken line cross-section, or a wave-shaped cross-section, or in the form of complementary annular grooves and annular protrusions.

[0049] like Figure 1 , 2 As shown in Figures 3 and 5, the manifold 5 of the dry cooler 1 is provided with a discharge valve seat 22. The discharge valve seat 22 is provided with a discharge channel communicating with the manifold cavity of the manifold 5. A plug 23 is detachably provided on the discharge port at the outer end of the discharge channel. The plug 23 is T-shaped and includes an integrally connected large-end screwing part 24 and a round rod part 25. The round rod part 25 engages with the internal thread in the discharge port through its threaded section 26. The round rod part 25 includes a threaded section 26 at the front end and a reduced-diameter section 27 at the rear end. A pressure balance channel 28 is provided between the side wall of the reduced-diameter section 27 and the front end face of the threaded section 26. The outer diameter of the threaded section 26 is adapted to the inner diameter of the discharge port, but is larger than the outer diameter of the reduced-diameter section 27. An annular groove 29 is provided on the inner end face of the large-end screwing part 24. A sealing ring is provided in the annular groove 29, and the sealing ring is in contact with the end face of the discharge valve seat 22.

[0050] Specifically, a discharge channel is formed in the discharge valve seat 22 on the manifold 5 of the dry cooler 1, which can be used for venting or draining liquid. The discharge port of the discharge channel is sealed by a plug 23, which is similar to a bolt with a T-shaped axial cross section. The threaded section 26 of the round rod 25 engages with the thread of the discharge port, ensuring flexible disassembly. Furthermore, in order to realize the rotation operation of the plug 23, the large-end turning part 24 is hexagonal, and the plug 23 can be rotated by a corresponding wrench or screwdriver. The first half of the round rod 25 is a threaded section 26, and the second half is a reduced-diameter section 27. An annular gap is formed between the reduced-diameter section 27 and the discharge port. The air pressure balance channel 28 connects the side wall of the reduced-diameter section 27 and the front end face of the threaded section 26, that is, it connects the annular gap and the collection cavity. This allows air to enter and exit through the air pressure balance channel 28 when the plug 23 is screwed in or out, especially before the inner end face of the large head comes into contact with the end face of the tubular base, thus achieving an internal and external air pressure balance and facilitating disassembly and assembly. Specifically, the side wall of the reduced-diameter section 27 is provided with an external air pressure balance hole 30, and the end face of the threaded section 26 is provided with an internal air pressure balance hole 31. The internal air pressure balance hole 31 and the external air pressure balance hole 30 are connected to form the air pressure balance channel 28. A sealing ring is provided on the inner side of the large-end screwing part 24. This sealing ring is in close contact with the end face of the discharge valve seat 22, achieving a circumferential seal between the discharge valve seat 22 and the large-end screwing part 24.

[0051] In this embodiment, the manifold 5 of the dry cooler 1 is provided with an inlet / outlet pipe connector 32. The outer end of the inlet / outlet pipe connector 32 is provided with a flange-type quick connector 34 for connecting the inlet / outlet liquid pipes. The flange-type quick connector 34 is annular, with a mating interface formed at its bottom. The end of the inlet / outlet pipe connector 32 is inserted into the mating interface and welded in place. The end face of the inlet / outlet pipe connector 32 abuts against the annular stepped surface on the inner side of the mating interface. The outer end of the flange-type quick connector 34 is provided with an annular protrusion that can mate with the matching free connector of the inlet / outlet liquid pipe. The flange portion of the flange-type quick connector 34 and the flange portion of the free connector are fixed together by bolts. A sealing ring is provided between the end faces of the flange-type quick connector 34 and the free connector. The manifold 5 of the condenser 2 is connected to inlet / outlet pipes 35.

[0052] Working principle: In use, this heat exchange device can be installed in a square installation space. The first connecting platform 15 and the second connecting platform 16 are fixedly connected to the corresponding mounting planes by bolts. When the heat exchange demand is low, only the dry cooler 1 can be used, and the corresponding heat exchange medium flows in the dry cooler 1 to maintain high heat exchange efficiency. When the heat exchange demand is high, the condenser 2 can be used simultaneously or only, and the corresponding heat exchange medium flows in the condenser 2 to improve heat exchange efficiency.

[0053] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A U-shaped heat exchanger device integrating multiple heat exchange units and featuring a bend, characterized in that, It includes at least two stacked plate-shaped heat exchange units, each heat exchange unit including a dry cooler (1) and a condenser (2), the heat exchange units are bent into a U-shape, and a detachable fixing structure (4) is provided between the side plates (3) of the heat exchange units.

2. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 1, characterized in that, The dry cooler (1) and the condenser (2) both include two parallel manifolds (5). Several flat tubes (6) bent into U shapes and two side plates (3) are arranged between the manifolds (5). The flat tubes (6) are located between the two side plates (3). The detachable fixing structure (4) is set between the adjacent side plates (3).

3. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 2, characterized in that, The detachable fixing structure (4) includes a side plate (7) located on the side of the side plate (3) away from the flat tube (6). The side plate (7) is fixedly connected to the adjacent side plate (3) by a rivet structure or a bolt structure. The side plate (7) is located at both ends and / or the middle position of the side plate (3).

4. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 3, characterized in that, The side plate (3) includes a first straight section (8) at both ends and a second straight section (9) in the middle. The first straight section (8) and the second straight section (9) are arranged perpendicularly and connected by an arc-shaped bending section (10). The side plate (7) connects the adjacent first straight section (8) and the adjacent second straight section (9) respectively.

5. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 4, characterized in that, An extension connection surface (11) is provided on at least one side plate (7), the extension connection surface (11) extends to the inner side of the inner heat exchange unit and / or the outer side of the outer heat exchange unit, and a first connection hole (12) is provided on the extension connection surface (11). The side plate (7) has at least one vent (13) distributed along its length, and the vent (13) is located between two adjacent side plates (3).

6. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 4, characterized in that, The inner diameters of the bends (10) of adjacent heat exchange units are the same, and the spacing between the adjacent first straight sections (8) and the spacing between the second straight sections (9) are the same, but smaller than the spacing between the adjacent bends (10).

7. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to claim 2, characterized in that, The side plate (3) has a side opening (14) on one or both sides of the bent section (10), and the side opening (14) is evenly arranged along the arc length direction of the bent section (10).

8. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to any one of claims 1-7, characterized in that, The manifolds (5) of adjacent heat exchange units are respectively provided with a first connecting platform (15) and a second connecting platform (16). The cross-section of the first connecting platform (15) is h-shaped, including an arc-shaped part (17) and a straight part (18). The arc-shaped part (17) is attached to the manifold (5) and welded to it. The cross-section of the second connecting platform (16) is U-shaped, and an arc surface is formed on one side. The arc surface is attached to the manifold (5) and welded and fixed. The top surface of the second connecting platform (16) is in close contact with the bottom surface of the straight part (18). A tubular support column (19) is horizontally placed inside the second connecting platform (16), and the two ends of the support column (19) abut against the two inner sides of the second connecting platform (16); A second connecting hole (20) is provided through the straight part (18) and the second connecting platform (16), and a fixing bolt is provided in the second connecting hole (20) and the support column (19).

9. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to any one of claims 1-7, characterized in that, The dry cooler (1) has a discharge valve seat (22) on its manifold (5). The discharge valve seat (22) has a discharge channel that communicates with the manifold (5). A plug (23) is detachably installed on the discharge port at the outer end of the discharge channel. The plug (23) is T-shaped and includes an integrally connected large-head screwing part (24) and a round rod part (25). The round rod part (25) engages with the internal thread in the discharge port through its threaded section (26). The round rod portion (25) includes a threaded section (26) at the front end and a reduced diameter section (27) at the rear end. An air pressure balance channel (28) is provided between the side wall of the reduced diameter section (27) and the front end face of the threaded section (26). The outer diameter of the threaded section (26) is adapted to the inner diameter of the discharge port, but is larger than the outer diameter of the reduced diameter section (27); The inner end face of the large-head screwing part (24) is provided with an annular groove (29), and a sealing ring is provided in the annular groove (29). The sealing ring is in contact with the end face of the discharge valve seat (22).

10. The U-shaped heat exchanger device with integrated and bent multiple heat exchange units according to any one of claims 1-7, characterized in that, The dry cooler (1) has an inlet and outlet pipe connection seat (32) on its manifold (5), and the outer end of the inlet and outlet pipe connection seat (32) is provided with a flange quick connector (34) or a chuck quick connector for connecting the inlet and outlet liquid pipes; the condenser (2) has an inlet and outlet pipe (35) connected to its manifold (5).

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