Novel flat tube assembly, heat exchanger, air conditioner condenser and evaporator

Abstract

The utility model provides a novel flat tube assembly, a heat exchanger, an air conditioner condenser and an evaporator. The novel flat tube assembly comprises a tube shell, inner fins and a flow channel. Wave-shaped inner fins are arranged in the tube shell, a plurality of flow channels are formed between the inner fins and the inner wall of the tube shell, and the flow areas of the flow channels are sequentially reduced; a plurality of convex hulls are arranged on the inner wall of the tube shell and located in the flow channel. By means of the mode that the extrusion type or high-frequency welding type tube shell is matched with the inner fins, the problems that a folding lap joint type is prone to deformation and dislocation to form badness can be solved, and better heat exchange performance and welding performance of the inner fins are obtained by optimizing the shape and local characteristics.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange flat tube structure field, specifically, it relates to novel flat tube assembly, heat exchanger, air conditioner condenser and evaporator. BACKGROUND

[0002] At present, the extruded flat tube and the folded flat tube are usually adopted in the parallel flow type evaporator, such as the flat tube of the heat exchanger disclosed in the patent CN208567620U. The flat tube has a heavy weight, and the heat exchange performance per unit weight and area is poor. In the above-mentioned folded + inner fin mode, the lap joint can form a fixed seal after welding, so the lap joint is in a free state before welding and is easy to deform, which can cause defects. At present, the laminated evaporator on the market adopts plate stacking, which is usually a corrugated or convex plate stacking stroke channel, or an inner fin is added in the middle of the plate. The mold is not good in versatility and is poor in economy when it cannot be applied to different projects with different lengths. SUMMARY

[0003] In view of the defects in the prior art, the utility model aims to provide a novel flat tube assembly, a heat exchanger, an air conditioner condenser and an evaporator.

[0004] According to the utility model, the novel flat tube assembly comprises a tube shell, an inner fin and a flow channel.

[0005] The inner fin in the tube shell is in a wave shape, a plurality of flow channels are formed between the inner fin and the inner wall of the tube shell, and the flow areas of the plurality of flow channels decrease in turn.

[0006] The inner wall of the tube shell is provided with a plurality of convexes, and the convexes are located in the flow channels.

[0007] Preferably, the plurality of flow channels are arranged along the width direction of the tube shell, and the flow channels extend along the length direction of the tube shell.

[0008] Preferably, the shape of the convexes comprises a circle, an ellipse, a triangle and a trapezoid.

[0009] Preferably, a single wave crest or wave trough of the wave-shaped inner fin is provided with a trapezoidal structure, the end of the trapezoidal structure of the inner fin is a straight line end, and the straight line end is welded to the inner wall of the tube shell.

[0010] Preferably, a groove is arranged between the straight line end and the tube shell, and the groove extends along the length direction of the tube shell to form a capillary channel.

[0011] Preferably, the decrease in the flow areas of the plurality of flow channels is realized by the decrease in the length of the straight line end.

[0012] Preferably, one or more convex hulls are arranged in the single flow channel, and the number of convex hulls in the plurality of flow channels is the same or different.

[0013] Compared with the prior art, the utility model has the beneficial effects as follows:

[0014] 1、 the cooperation of the pipe shell convex hull and the inner fin can solve the problems of easy deformation and misplacement of the folding lapping type, and the inner fin also obtains better heat exchange performance and welding performance through the optimization of shape and local characteristics.

[0015] 2、 compared with the folding lapping pipe, the quality control of the pipe shell is more superior, the weight is lighter, the cost is saved, compared with the laminated type, the pipe shell is suitable for different project requirements and different lengths, the mold universality is good, and the economy is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings:

[0017] Figure 1 It is a schematic view of the end face structure of the flat pipe assembly;

[0018] Figure 2 It is a schematic view of the position relation of the pipe shell and the inner fin;

[0019] Figure 3 It is a schematic view of the position relation of the convex hull and the inner fin;

[0020] Figure 4 It is a schematic view of the external structure of the flat pipe assembly;

[0021] The drawings show:

[0022] DETAILED DESCRIPTION

[0023] The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of changes and improvements can be made. These all belong to the protection scope of the utility model.

[0024] For example, Figures 2-4As shown, this embodiment provides a flat tube assembly 100, which can be effectively applied to external heat exchangers, air conditioning condensers, and evaporators in air conditioning (heat pump) systems. The flat tube assembly 100 includes: a tube shell 200, inner fins 300, and flow channels 400. The tube shell 200 has corrugated inner fins 300, forming multiple flow channels 400 between the inner fins 300 and the inner wall of the tube shell 200. The flow area of ​​the multiple flow channels 400 decreases sequentially by decreasing the length of the straight ends. The tube shell 200 can be either extruded or high-frequency welded. The inner wall of the tube shell 200 has multiple protrusions 210 located within the flow channels 400. The shapes of the protrusions 210 include, but are not limited to, circles, ellipses, triangles, and trapezoids.

[0025] like Figure 1 As shown, the individual crests or troughs of the corrugated inner fin 300 are designed as trapezoidal structures, with straight ends at the trapezoidal ends. These straight ends are welded to the inner wall of the shell 200, allowing for a longer weld length. A groove 310 is provided between the straight ends and the shell 200, extending along the length of the shell 200 to form a capillary channel. This facilitates the flow of solder, enabling a more complete weld between the inner fin 300 and the shell 200 (avoiding incomplete welds) and higher heat transfer efficiency.

[0026] In this embodiment, the convex hull 200, combined with the different intercepts of the inner fins 300, forms a first flow channel 411, a second flow channel 412, a third flow channel 413... and an nth flow channel 41n with progressively decreasing flow areas. When internal flow resistance and heat exchange need to be balanced, the flow channels 400 can be designed to decrease sequentially along the flow direction of the external fluid. According to the heat exchange principle, the external fluid and the shell 200 exchange heat. The temperature of the external fluid gradually increases along the flow direction, and the temperature difference between the external fluid and the shell 200 decreases, which weakens the heat exchange. At this time, by reducing the flow area of ​​the flow channel 400 to form a larger heat transfer coefficient, the heat exchange is enhanced. At the same time, compared with the state where all are smaller nth flow channels 41n, the flow resistance requirements can be better met.

[0027] In one embodiment, a plurality of flow channels 400 are arranged along the width direction of the casing 200 and the flow channels 400 extend along the length direction of the casing 200.

[0028] In one embodiment, one or more protrusions 210 are provided within a single flow channel 400, and the number of protrusions 210 in multiple flow channels 400 may be the same or different. The arrangement of the protrusions 210 can be designed with different numbers of protrusions 220 within a single flow channel 400 according to the different wave pitches a1, a2, a3, etc. of the inner fins 300. The protrusions 220 also limit the movement of the inner fins 300, preventing lateral movement, and effectively controlling the deviation caused by changes in the size of the flow channel 400.

[0029] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A novel flat tube assembly, characterized in that, include: The tube shell (200), inner fins (300), and flow channel (400); The tube shell (200) is provided with a wavy inner fin (300), and multiple flow channels (400) are formed between the inner fin (300) and the inner wall of the tube shell (200), with the flow area of ​​the multiple flow channels (400) decreasing sequentially. The inner wall of the tube shell (200) is provided with a plurality of protrusions (210), and the protrusions (210) are located in the flow channel (400).

2. The novel flat tube assembly according to claim 1, characterized in that: The plurality of flow channels (400) are arranged along the width direction of the shell (200) and the flow channels (400) extend along the length direction of the shell (200).

3. The novel flat tube assembly according to claim 1, characterized in that: The shape of the convex hull (210) includes a circle, an ellipse, a triangle, and a trapezoid.

4. The novel flat tube assembly according to claim 1, characterized in that: The individual crests or troughs of the wavy inner fin (300) are set as trapezoidal structures, and the ends of the trapezoidal structures of the inner fin (300) are straight ends, which are welded to the inner wall of the shell (200).

5. The novel flat tube assembly according to claim 4, characterized in that: A groove (310) is provided between the straight end and the shell (200), and the groove (310) extends along the length direction of the shell (200) to form a capillary channel.

6. The novel flat tube assembly according to claim 4, characterized in that: The flow area of ​​multiple channels (400) is gradually reduced by decreasing the length of the straight ends.

7. The novel flat tube assembly according to claim 1, characterized in that: One or more convex hulls (210) are provided in a single flow channel (400), and the number of convex hulls (210) in multiple flow channels (400) may be the same or different.

8. A heat exchanger, characterized in that: The novel flat tube assembly described in any one of claims 1-7 is adopted.

9. An air conditioner condenser, characterized in that: The novel flat tube assembly described in any one of claims 1-7 is adopted.

10. An evaporator, characterized in that: The novel flat tube assembly described in any one of claims 1-7 is adopted.

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