Multi-form serpentine tube micro-channel heat exchanger

Abstract

The utility model discloses a kind of multi-form serpentine tube microchannel heat exchanger, which is designed through asymmetric section and variable curvature path, combined with compact microchannel layout, realize the minimum bending radius of pipe body and the uniformization of fluid distribution special-shaped serpentine pipe scheme, to compress equipment volume and improve unit volume heat exchange efficiency.The utility model provides a kind of multi-form serpentine tube microchannel heat exchanger, including microchannel flat tube, a plurality of microchannels are equipped in microchannel flat tube, microchannel flat tube is formed serpentine pipe in serpentine back and forth, serpentine pipe back and forth length gradually decreases, and the port of the both ends of serpentine pipe is connected respectively with header assembly;Multiple rows of fins are provided on serpentine pipe.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, specifically relating to a multi-morphological serpentine tube microchannel heat exchanger. Background Technology

[0002] The serpentine tube microchannel heat exchanger is a compact heat exchange device that combines the serpentine tube bending structure with the microchannel design. By increasing the heat exchange area and optimizing fluid flow, it significantly improves heat transfer efficiency and is suitable for high-efficiency heat exchange needs in fields such as chemical engineering and refrigeration.

[0003] Existing dryer heat exchangers mostly employ rectangular or circular cross-section designs, limiting the dynamic expansion capability of the heat exchange area. This leads to frequent occurrences of localized overheating or undercooling areas, affecting the uniformity of clothes drying and increasing energy consumption. In response, Chinese patent CN210425642U discloses a serpentine tube heat exchanger. The two ends of the serpentine flat tube are located on the left and right sides along its length, with the serpentine flat tubes stacked vertically. Fins are provided between the parallel flat tubes inside the serpentine tube and between the serpentine flat tubes themselves, which can improve heat exchange efficiency. However, this serpentine tube heat exchanger suffers from low space utilization and poor adaptability to irregularly shaped areas in drying scenarios. Summary of the Invention

[0004] In view of this, the present invention provides a multi-form serpentine tube microchannel heat exchanger suitable for clothes dryer scenarios. It achieves a non-circular serpentine tube scheme by using an asymmetric cross-section and variable curvature path design, combined with a compact microchannel layout, to minimize the tube bending radius and uniform fluid distribution, thereby reducing the equipment volume and improving the heat exchange efficiency per unit volume.

[0005] To address the aforementioned problems, embodiments of this utility model provide a multi-morphological serpentine tube microchannel heat exchanger, characterized by:

[0006] It includes a microchannel flat tube, which has multiple microchannels inside. The microchannel flat tube is serpentine and folds back and forth to form a serpentine tube. The folding length of the serpentine tube gradually decreases. The two ends of the serpentine tube are connected to the manifold assembly. The serpentine tube has multiple rows of fins.

[0007] Furthermore, the serpentine tubes are in several groups, stacked together, with each layer of serpentine tubes arranged in the same way; the ports on the same side of adjacent layers of serpentine tubes are connected through a manifold assembly, and the several groups of serpentine tubes form a series structure.

[0008] Furthermore, the manifold assembly is provided with a flat tube groove, and the port of the serpentine tube is inserted into the flat tube groove on the manifold assembly.

[0009] Furthermore, each row of fins includes a sheet-like main body structure, with several through slots on one side of the main body structure, into which a serpentine tube is inserted.

[0010] Furthermore, each layer of the serpentine tube is provided with multiple rows of fins, which are arranged in parallel.

[0011] Furthermore, the manifold assembly connected to the inlet and outlet ends of the uppermost and lowermost serpentine tubes includes a manifold with a hole inside. The upper end of the hole is sealed by a plug cap, and a flat tube groove is provided on the side of the manifold. The lower end of the hole is connected to the medium inlet / outlet pipe.

[0012] Furthermore, the adjacent two-layer connected manifold assembly includes a manifold with a hole inside. The upper and lower ends of the hole are sealed by a plug and a plug, respectively. The side of the manifold has two flat tube grooves for inserting the serpentine tube port.

[0013] Furthermore, the fins of each layer of the serpentine tube are inserted in the same direction.

[0014] Furthermore, the number of the serpentine tubes is even, with each two layers forming a group, and the fins of the serpentine tubes in each group are inserted in opposite directions.

[0015] Furthermore, the number of the serpentine tubes is odd; they are arranged in groups of two, either from top to bottom or from bottom to top, with the fins of the serpentine tubes in each group inserted in opposite directions.

[0016] Compared with the prior art, the multi-morphological serpentine tube microchannel heat exchanger proposed in this utility model has at least the following beneficial effects:

[0017] 1. The irregular shape of the serpentine tube saves space occupied by the heat exchanger and is more suitable for irregular installation areas inside the dryer;

[0018] 2. Insert-type fins can effectively prevent lint from entering the heat exchanger;

[0019] 3. The in-line fin design can increase the effective windward area, thereby improving heat exchange.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a structural diagram of a multi-morphological serpentine tube microchannel heat exchanger proposed in this utility model;

[0023] Figure 2 for Figure 1 Exploded view of a multi-morphological serpentine tube microchannel heat exchanger;

[0024] Figure 3 for Figure 1 Structural diagrams of manifold assembly 2 and manifold assembly 8;

[0025] Figure 4 This is a structural diagram of another multi-morphological serpentine tube microchannel heat exchanger proposed in this utility model.

[0026] In the picture:

[0027] Intake pipe 1,

[0028] Manifold assembly 2, manifold 201, plug cap 202, hole 203, flat tube groove 204, inlet hole 205,

[0029] 3. Serpentine tube, 4. Fin, 5. Fin, 6. Fin, 7.

[0030] Manifold assembly 8, manifold 801, plug cap 802 and 803, hole 804, flat tube groove 805, flat tube groove 806, hole 807,

[0031] 9. Serpentine tube, 10. Manifold assembly, 11. Serpentine tube, 12. Manifold assembly, 13. Liquid outlet pipe, 21. Gas outlet pipe, 22. Manifold assembly, 23. Serpentine tube, 24. Fin, 25. Fin, 26. Fin, 27. Manifold assembly, 28. Serpentine tube, 29. Manifold assembly, 30. Liquid inlet pipe, and 31. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. This utility model is intended for more general application in clothes dryers; therefore, it can be used in any practical application with the specific requirements of the application.

[0033] This utility model provides a multi-form serpentine tube microchannel heat exchanger, including a microchannel flat tube, which has multiple microchannels inside. The microchannel flat tube is serpentine and folds back and forth to form a serpentine tube, with the folding length of the serpentine tube gradually decreasing. The two ends of the serpentine tube are respectively connected to a manifold assembly. The serpentine tube has multiple rows of fins for heat dissipation.

[0034] Specifically, the serpentine tubes are in the form of several stacked tubes, with each layer of tubes arranged in the same way; the ports on the same side of two adjacent layers of tubes are connected by a manifold assembly, and several groups of tubes form a series structure.

[0035] Specifically, the manifold assembly is provided with a flat tube groove, and the end of the serpentine tube is inserted into the flat tube groove on the manifold assembly. The medium flows evenly into the microchannel of the serpentine tube through the manifold assembly and the flat tube groove.

[0036] Specifically, each layer of the serpentine tube is provided with multiple rows of fins, which are arranged in parallel. Specifically, each row of fins includes a sheet-like main structure, and one side of the main structure is provided with several through slots into which the serpentine tube is inserted.

[0037] When the fins of each layer of serpentine tubes are inserted in the same direction, a sequentially inserted finned serpentine tube heat exchanger is formed.

[0038] When the number of serpentine tubes is even, each pair of layers forms a group, and the fins of the serpentine tubes in each group are inserted in opposite directions, forming a plug-in microchannel heat exchanger.

[0039] When the number of serpentine tubes is odd; from top to bottom or from bottom to top, every two layers form a group, and the fins of the serpentine tubes in each group are inserted in opposite directions, the fin insertion method of the remaining layer of serpentine tubes is not limited.

[0040] Example 1

[0041] See Figure 1 and Figure 2 A multi-morphological serpentine tube microchannel heat exchanger includes microchannel flat tubes, which are serpentine in shape, folding back and forth. The serpentine tubes consist of three layers: serpentine tube 3, serpentine tube 9, and serpentine tube 11.

[0042] The intake pipe 1 is connected to the manifold assembly 2, and the serpentine tube 3 is inserted into the flat tube groove of the manifold assembly 2 at its head. Serpentine tubes 3, 9, and 11 contain multiple microchannels, which the manifold assembly 2 uses to evenly distribute the heat exchange medium from the intake pipe 1 into the microchannels of the serpentine tube 3. The serpentine tube 3 zigs back and forth in a serpentine pattern, with the zigs gradually decreasing in length, and finally connects to the manifold assembly 8. The manifold assembly 8 connects serpentine tubes 3 and 9, which are respectively inserted into the flat tube groove of the manifold assembly 8. Serpentine tube 9 zigs back and forth in a serpentine pattern, with the zigs gradually increasing in length, and finally connects to the manifold assembly 10. The manifold assembly 10 connects serpentine tubes 9 and 11, which are respectively inserted into the flat tube groove of the manifold assembly 10. The serpentine tube 11 zigzags back and forth in a serpentine pattern, with the zigzag length gradually decreasing, and finally connects to the manifold assembly 12. The serpentine tube 11 is inserted into the flat tube groove of the manifold assembly 12, which is connected to the outlet tube 13. The serpentine tubes 3, 9, and 11 are all equipped with fins 4, 5, 6, and 7 on their exteriors, with the number of fins decreasing sequentially from the tail end to the head end, corresponding to different parts of the serpentine tubes 3, 9, and 11 respectively. Figure 1 The number of fins 4, 5, 6, and 7 can be large. From the appearance, the heat exchanger presents a triangular structure. By adjusting the bending method and length of the serpentine tubes 3, 9, and 11, other heat exchanger shapes can also be formed.

[0043] The heat exchange medium enters the manifold assembly 2 through the inlet pipe 1. The heat exchange medium in the manifold assembly 2 flows through the serpentine pipe 3 and then enters the manifold assembly 8. The heat exchange medium in the manifold assembly 8 flows through the serpentine pipe 9 and then enters the manifold assembly 10. The heat exchange medium in the manifold assembly 10 flows through the serpentine pipe 11 and then enters the manifold assembly 12. The heat exchange medium in the manifold assembly 12 flows out of the heat exchanger through the liquid outlet pipe 13.

[0044] The fins of each layer of the serpentine tube are inserted in the same direction, from top to bottom. This fin installation structure is a sequential insertion type, forming a three-row sequential insertion finned serpentine tube heat exchanger, which can increase the effective windward area and enhance the heat exchange effect.

[0045] See Figure 3 (a) The manifold assembly 2 includes a manifold 201 and a plug 202. The intake pipe 1 is connected to the inlet hole 205 of the manifold 201, the serpentine pipe 3 is connected to the flat groove 204 of the manifold 201, and the plug 202 is connected to the hole 203 of the manifold 201. The structure of the manifold assembly 12 is similar to that of the manifold assembly 2.

[0046] Figure 3 (b) is Figure 1The structure of the manifold assembly 8. The manifold assembly 8 includes a manifold 801, a cap 802, and a cap 803. A serpentine tube 3 is connected to the flat groove 805 of the manifold 801, a serpentine tube 9 is connected to the flat groove 806 of the manifold, a cap 802 is connected to the hole 804 of the manifold 801, and a cap 803 is connected to the hole 807 of the manifold 801. The structure of the manifold assembly 10 is similar to that of the manifold assembly 8.

[0047] Example 2

[0048] Another type of multi-morphological serpentine tube microchannel heat exchanger is an equivalent structure of Example 1. See also Figure 4 The microchannel heat exchanger consists of two layers of serpentine tubes: serpentine tube 23 and serpentine tube 29. It is a double-layer serpentine tube heat exchanger. It also includes an outlet pipe 21, a manifold assembly 22, a manifold assembly 28, a manifold assembly 30, and a liquid inlet pipe 31. The manifold assembly 30 connected to the first end of the lower serpentine tube 29 includes a manifold, the upper end of which is connected to the liquid inlet pipe 31. The manifold assembly 22 connected to the first end of the upper serpentine tube 23 includes a manifold, the upper end of which is connected to the outlet pipe 21. The structures of manifold assemblies 22 and 30 are the same as those of manifold assembly 2, and the structure of manifold assembly 28 is the same as that of manifold assembly 8.

[0049] The fins 24, 25, 26, and 27 of the two layers of serpentine tubes are inserted in opposite directions, that is, the fins on the upper serpentine tube 23 are inserted from top to bottom, and the fins on the lower serpentine tube 29 are inserted from bottom to top, forming a double-layer interlocking microchannel heat exchanger. The interlocking installation can effectively prevent lint and other dirt from entering the heat exchanger.

[0050] The heat exchange medium enters the manifold assembly 30 through the liquid inlet pipe 31. The heat exchange medium in the manifold assembly 30 flows through the serpentine pipe 29 and then enters the manifold assembly 28. The heat exchange medium in the manifold assembly 28 flows through the serpentine pipe 23 and then enters the manifold assembly 22. The heat exchange medium in the manifold assembly 22 flows out of the heat exchanger through the gas outlet pipe 21.

[0051] In summary, the multi-morphological serpentine tube microchannel heat exchanger proposed in this utility model achieves a non-circular serpentine tube scheme that minimizes the tube's bending radius and uniforms the fluid distribution through asymmetric cross-section and variable curvature path design combined with a compact microchannel layout. This reduces the equipment volume and improves the heat exchange efficiency per unit volume. This heat exchanger mechanism is not only suitable for clothes dryers, but can also be used in other scenarios with high space requirements.

[0052] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A multi-morphological serpentine tube microchannel heat exchanger, characterized in that: It includes a microchannel flat tube, which has multiple microchannels inside. The microchannel flat tube is serpentine and folds back and forth to form a serpentine tube. The folding length of the serpentine tube gradually decreases. The two ends of the serpentine tube are connected to the manifold assembly. The serpentine tube has multiple rows of fins.

2. The multi-morphological serpentine tube microchannel heat exchanger according to claim 1, characterized in that: The serpentine tubes consist of several groups, stacked together, with each layer of serpentine tubes arranged in the same way; the ports on the same side of adjacent layers of serpentine tubes are connected through a manifold assembly, and the several groups of serpentine tubes form a series structure.

3. The multi-morphological serpentine tube microchannel heat exchanger according to claim 2, characterized in that: The manifold assembly is provided with a flat tube groove, and the end of the serpentine tube is inserted into the flat tube groove on the manifold assembly.

4. The multi-morphological serpentine tube microchannel heat exchanger according to claim 3, characterized in that: Each row of fins includes a sheet-like main structure, with several through slots on one side of the main structure, into which a serpentine tube is inserted.

5. The multi-morphological serpentine tube microchannel heat exchanger according to claim 4, characterized in that: Each layer of the serpentine tube has multiple rows of fins arranged in parallel.

6. The multi-morphological serpentine tube microchannel heat exchanger according to claim 5, characterized in that: The manifold assembly connecting the inlet and outlet ends of the uppermost and lowermost serpentine tubes includes a manifold with a hole inside. The upper end of the hole is sealed by a plug cap. The side of the manifold has a flat tube groove, and the lower end of the hole is connected to the medium inlet / outlet pipe.

7. The multi-morphological serpentine tube microchannel heat exchanger according to claim 6, characterized in that: The manifold assembly connecting two adjacent layers includes a manifold with a hole inside. The upper and lower ends of the hole are sealed by a plug and a plug, respectively. The side of the manifold has two flat tube grooves for inserting the serpentine tube port.

8. The multi-morphological serpentine tube microchannel heat exchanger according to claim 7, characterized in that: The fins of each layer of the serpentine tube are inserted in the same direction.

9. The multi-morphological serpentine tube microchannel heat exchanger according to claim 7, characterized in that: The number of serpentine tubes is even, with each group consisting of two layers, and the fins of the serpentine tubes in each group are inserted in opposite directions.

10. The multi-morphological serpentine tube microchannel heat exchanger according to claim 7, characterized in that: The number of serpentine tubes is odd; they are arranged in groups of two, either from top to bottom or from bottom to top, with the fins of the serpentine tubes in each group inserted in opposite directions.

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