Heat exchange tube

Abstract

The invention provides a heat exchange tube which comprises an inner tube and an outer tube, at least part of the inner tube is located in the outer tube, the heat exchange tube comprises a baffle, at least part of the baffle is located between the inner tube and the outer tube, and at least one of the inner tube and the outer tube makes contact with the baffle; a flow inlet and a flow outlet are formed between the inner pipe and the outer pipe in the axial direction of the inner pipe, the flow inlet and the flow outlet are located in the two sides of the baffle respectively in the thickness direction of the baffle, and the flow inlet and the flow outlet can be communicated. According to the heat exchanger, the baffles are at least partially located between the inner pipe and the outer pipe, the circulation area is reduced, the flow speed is increased through the baffles, and therefore turbulent flow of internal refrigerants is enhanced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of thermal management, and more particularly to heat exchange tubes. Background Technology

[0002] In related technologies, heat exchange tubes consist of an inner tube and an outer tube, with the outer tube sleeved outside the inner tube. Heat exchange occurs when fluids of different temperatures flow through the inner tube and between the inner and outer tubes. However, the flow of these fluids is relatively stable, resulting in poor heat exchange efficiency. Summary of the Invention

[0003] This application provides a heat exchange tube with higher heat exchange efficiency.

[0004] This application provides a heat exchange tube, including an inner tube and an outer tube, wherein the inner tube is at least partially located inside the outer tube, and the heat exchange tube includes a baffle, wherein the baffle is at least partially located between the inner tube and the outer tube, and at least one of the inner tube and the outer tube is in contact with the baffle;

[0005] In the axial direction of the inner tube, there is an inlet and an outlet between the inner tube and the outer tube. In the thickness direction of the baffle, the inlet and the outlet are located on both sides of the baffle, and the inlet and the outlet can communicate with each other.

[0006] In this application, the baffle is located at least partially between the inner and outer pipes. The baffle reduces the flow area and increases the flow velocity, thereby enhancing the turbulence of the internal refrigerant and improving the heat exchange efficiency. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram of the heat exchanger structure in this application;

[0008] Figure 2 This is an exploded view of the heat exchanger structure in this application;

[0009] Figure 3 This is a schematic cross-sectional view of the heat exchanger structure in this application. Figure 1 ;

[0010] Figure 4 This is a schematic cross-sectional view of the heat exchanger structure in this application. Figure 2 ;

[0011] Figure 5 This is a schematic diagram of the first embodiment of the heat exchanger structure in this application;

[0012] Figure 6 This is a schematic diagram of the second embodiment of the heat exchanger structure in this application;

[0013] Figure 7 This is a schematic diagram of one embodiment of the connection between the baffle and the positioning rod in the heat exchanger structure of this application;

[0014] Figure 8 This is a schematic diagram of another embodiment of the connection between the baffle and the positioning rod in the heat exchanger structure of this application. Detailed Implementation

[0015] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0016] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other technical solutions obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0017] For ease of understanding, the features described in the related technologies will be given the same or similar names as the technical features in this application, so as to facilitate understanding of the difference between this application and related technologies. Similarly, to facilitate the distinction between the technical features of this application and the technical features of related technologies, the technical features in related technologies are not marked with reference numerals.

[0018] In related technologies, heat exchange tubes consist of an inner tube and an outer tube, with the outer tube sleeved outside the inner tube. Heat exchange occurs when fluids of different temperatures flow through the inner tube and between the inner and outer tubes. However, the flow of these fluids is relatively stable, resulting in poor heat exchange efficiency.

[0019] This application provides a heat exchange tube, such as Figures 1 to 8 As shown, its specific structure includes an inner tube 1 and an outer tube 2. The inner tube 1 is at least partially located inside the outer tube 2. The heat exchange tube includes a baffle 3, which is at least partially located between the inner tube 1 and the outer tube 2. At least one of the inner tube and the outer tube is in contact with the baffle. In the extension direction of the heat exchange tube, there is an inlet Q1 and an outlet Q2 between the inner tube 1 and the outer tube 2. The inlet Q1 and the outlet Q2 are located at the two ends of the heat exchange tube, respectively. The baffle 3 is located between the inlet Q1 and the outlet Q2, and the inlet Q1 and the outlet Q2 can communicate with each other.

[0020] A baffle 3 is installed between the inner pipe 1 and the outer pipe 2. The baffle 3 can change the flow velocity of the fluid before and after it. The baffle 3 reduces the flow area between the inner pipe 1 and the outer pipe 2 at the location of the baffle 3, thereby increasing the fluid velocity after passing through the baffle 3, increasing the internal fluid turbulence, and improving the heat exchange efficiency. The baffle 3 is located between the inner pipe 1 and the outer pipe 2 and does not block the flow of fluid between the inner pipe 1 and the outer pipe 2. The inlet Q1 and the outlet Q2 can still be connected, facilitating fluid flow.

[0021] In the first embodiment, as Figure 5As shown, in the radial direction of the inner tube 1, at least one of the inner tube 1 and the outer tube 2 has a gap Q3 between it and the baffle 3, and the gap Q3 connects the inlet Q1 and the outlet Q2.

[0022] The baffle 3 is located between the inner pipe 1 and the outer pipe 2. The connection between the inlet Q1 and the outlet Q2 is mainly achieved through the gap Q3. In the radial direction, the baffle 3 is provided with a gap Q3 between the inner pipe 1 or the outer pipe 2, or the baffle 3 is provided with a gap Q3 between the inner pipe 1 and the outer pipe 2. This facilitates fluid flow, and the baffle 3 can also turbulent the fluid.

[0023] In the second embodiment, as Figure 6 As shown, the baffle 3 has a flow hole 301, which connects the inlet Q1 and the outlet Q2.

[0024] Baffle 3 is located between inner tube 1 and outer tube 2. The connection between inlet Q1 and outlet Q2 is mainly achieved through flow hole 301. Due to the reduced flow area, flow hole 301 can also increase the fluid velocity, thereby improving fluid turbulence. At this time, baffle 3 can contact non-flowing fluid with inner tube 1 and outer tube 2 in the radial direction. Alternatively, the scheme in the first embodiment can be adopted, with a gap Q3 between baffle 3 and at least one of inner tube 1 and outer tube 2, to further improve the turbulence effect and thus further improve the heat exchange efficiency.

[0025] There are multiple baffles 3, which are arranged at intervals along the axial direction of the inner tube 1.

[0026] The heat exchange tube includes a positioning rod 4, which is fixedly fitted with a baffle 3.

[0027] Multiple baffles 3 are arranged at intervals along the axial direction or the extension direction of the inner tube 1. The layered turbulence caused by these baffles 3 further enhances the turbulence effect. The positioning rod 4 provides the connection and fixing points for the baffles 3. In actual use, the fluid flows continuously between the inner tube 1 and the outer tube 2. If the baffles 3 are not connected and fixed, they may be impacted and stacked together under the impact of the fluid, potentially even blocking the flow channel. The positioning rod 4, also arranged along the axial direction of the inner tube 1 or the outer tube 2, can position and fix the multiple baffles 3, ensuring that each baffle 3 is in a fixed and suitable position to turbulent the flowing fluid. The baffles 3 can be connected to different positions on the positioning rod 4 along the axial or extension direction of the inner tube 1, thus maintaining a certain distance between adjacent baffles 3 and turbulenting the fluid at different locations.

[0028] Specifically, in the first and second embodiments, the method of connecting and fixing the positioning rod 4 to the baffle 3 can be as follows.

[0029] In one implementation, such as Figure 7 As shown, the baffle 3 has a positioning groove 302. The baffle 3 is roughly annular. Along the thickness direction of the baffle 3, the positioning groove 302 penetrates the baffle 3. The positioning groove 302 is located on the circumferential side wall of the baffle 3. The positioning rod 4 is fixedly connected to the wall constituting the positioning groove 302.

[0030] The positioning groove 302 is located at the edge of the baffle 3. During connection, the positioning rod 4 is inserted into the positioning groove 302, and the baffle 3 is fixed to the positioning rod 4 by welding, thus limiting the axial direction of the baffle 3 in the inner tube 1. Specifically, the baffle 3 can be welded to the positioning rod 4 at equal intervals, so that in practical applications, the baffle 3 can be turbulent as the fluid flows a certain distance, thereby improving heat exchange efficiency.

[0031] In yet another implementation, such as Figure 2 and 6 As shown, the baffle 3 has a positioning hole 303. The baffle 3 is roughly annular. The positioning hole 303 penetrates the baffle 3 along the thickness direction of the baffle 3. The positioning rod 4 is fixedly connected to the wall constituting the positioning hole 303.

[0032] The positioning hole 303 is opened on the baffle 3. When the baffle 3 and the positioning rod 4 are connected, the positioning rod 4 can be inserted into the positioning hole 303 corresponding to multiple baffles 3. Then the relative positions of multiple baffles 3 are adjusted and fixed by welding to limit the baffle 3 in the axial direction of the inner tube 1.

[0033] In yet another implementation, such as Figure 8 As shown, the baffle 3 has a positioning groove 302. The baffle 3 is roughly annular. Along the thickness direction of the baffle 3, the positioning groove 302 penetrates the baffle 3 and is located on the circumferential side wall of the baffle 3. The positioning rod 4 has a slot 401. In the axial direction of the inner tube 1, part of the wall forming the slot 401 contacts the baffle 3.

[0034] In this embodiment, the positioning groove 302 is still opened at the edge of the baffle 3, and the same slot 401 is also opened on the positioning rod 4. The two can be fixed by interlocking with each other, thus limiting the baffle 3 in the axial direction of the inner tube 1.

[0035] The outer tube 2 includes a limiting protrusion 201, and the baffle 3 has a limiting groove 304, with the limiting protrusion 201 at least partially located in the limiting groove 304.

[0036] To further fix the position of the baffle 3, the setting of the limiting protrusion 201 and the limiting groove 304 can restrict the rotation of the baffle 3 in the circumferential direction, making the position of the baffle 3 between the inner tube 1 and the outer tube 2 more stable and preventing it from rotating arbitrarily.

[0037] There are two positioning rods 4, which are symmetrically arranged in the circumferential direction of the inner tube 1, and multiple baffles 3 are evenly spaced along the length of the positioning rods 4.

[0038] Two positioning rods 4 are set and symmetrically arranged on both sides of the baffle 3, which makes the overall structure more stable and also makes it easier to assemble between the inner tube 1 and the outer tube 2.

[0039] The above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. The understanding of this specification should be based on those skilled in the art. For example, directional descriptions such as "front", "back", "left", "right", "up", and "down" are only used to describe the relationship between objects and are not substantial limitations. "Multiple" means at least two or more.

[0040] Although this specification has described the present application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present application, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heat exchange tube, characterized in that, The heat exchange tube includes an inner tube (1) and an outer tube (2), the inner tube (1) being at least partially located inside the outer tube (2), the heat exchange tube including a baffle (3), the baffle (3) being at least partially located between the inner tube (1) and the outer tube (2), and at least one of the inner tube (1) and the outer tube (2) being in contact with the baffle (3); In the extension direction of the heat exchange tube, there is an inlet (Q1) and an outlet (Q2) between the inner tube (1) and the outer tube (2). The inlet (Q1) and the outlet (Q2) are located at the two ends of the heat exchange tube, respectively. The baffle (3) is located between the inlet (Q1) and the outlet (Q2). The inlet (Q1) and the outlet (Q2) can communicate with each other.

2. The heat exchange tube according to claim 1, characterized in that, In the radial direction of the inner tube (1), at least one of the inner tube (1) and the outer tube (2) has a gap (Q3) between it and the baffle (3), the gap (Q3) connecting the inlet (Q1) and the outlet (Q2).

3. The heat exchange tube according to claim 1, characterized in that, The baffle (3) has a flow hole (301) that connects the inlet (Q1) and the outlet (Q2).

4. The heat exchange tube according to claim 2 or 3, characterized in that, The number of baffles (3) is multiple, and the multiple baffles (3) are arranged at intervals along the axial direction of the inner tube (1).

5. The heat exchange tube according to claim 4, characterized in that, The heat exchange tube includes a positioning rod (4), which is fixedly engaged with the baffle (3).

6. The heat exchange tube according to claim 5, characterized in that, The baffle (3) has a positioning groove (302). The baffle (3) is generally annular. Along the thickness direction of the baffle (3), the positioning groove (302) penetrates the baffle (3). The positioning groove (302) is located on the circumferential sidewall of the baffle (3). The positioning rod (4) is fixedly connected to the wall constituting the positioning groove (302).

7. The heat exchange tube according to claim 5, characterized in that, The baffle (3) has a positioning hole (303). The baffle (3) is generally annular. The positioning hole (303) passes through the baffle (3) along the thickness direction of the baffle (3). The positioning rod (4) is fixedly connected to the wall constituting the positioning hole (303).

8. The heat exchange tube according to claim 5, characterized in that, The baffle (3) has a positioning groove (302). The baffle (3) is generally annular. Along the thickness direction of the baffle (3), the positioning groove (302) penetrates the baffle (3). The positioning groove (302) is located on the circumferential sidewall of the baffle (3). The positioning rod (4) has a groove (401), and in the axial direction of the inner tube (1), a portion of the wall forming the groove (401) contacts the baffle (3).

9. The heat exchange tube according to claim 2 or 3, characterized in that, The outer tube (2) includes a limiting protrusion (201), and the baffle (3) has a limiting groove (304), wherein the limiting protrusion (201) is at least partially located in the limiting groove (304).

10. The heat exchange tube according to any one of claims 6, 7 or 8, characterized in that, There are two positioning rods (4). The two positioning rods (4) are symmetrically arranged in the circumferential direction of the inner tube (1), and a plurality of baffles (3) are evenly spaced along the length direction of the positioning rods (4).

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