Variable-channel folding flat pipe, air conditioner condenser, heat exchanger and evaporator

Abstract

The utility model provides a variable-channel folding flat tube, an air conditioner condenser, a heat exchanger and an evaporator. The variable-channel folding flat tube comprises a plate, a flow channel and a bending groove. The two ends, in the width direction, of the plate are bent to form a plurality of bent grooves correspondingly, and the bent grooves in the two ends form a first bent part and a second bent part correspondingly. A plurality of flow channels are defined by the first bending part, the second bending part and the plate straight sections on the two sides, and the flowing sectional areas of the flow channels are sequentially increased in the width direction of the plate. According to the variable-flow-channel folded flat pipe, the circulation sectional area can be gradually reduced in the outer side fluid flowing direction, the heat exchange efficiency is improved to improve the heat exchange capacity of a heat exchanger, the machining technology of the folded flat pipe is simple, and the material cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of flat tube structures, specifically to folded flat tubes with variable channels, air conditioning condensers, heat exchangers, and evaporators. Background Technology

[0002] Flat tubes are used in components such as air conditioner condensers. In conventional flat tubes, multiple parallel flow channels have the same flow area. When external fluid flows through the heat exchanger, due to heat transfer between the external and internal fluids, the temperature difference between the internal and external fluids gradually decreases along the flow direction of the external fluid, thus reducing the heat exchanger's efficiency. Currently, the most commonly used variable-channel flat tubes on the market are extruded flat tubes. Compared to folded flat tubes, extruded flat tubes have a more complex manufacturing process and higher material costs. Therefore, a variable-channel folded flat tube is needed. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a variable channel folded flat tube, an air conditioner condenser, a heat exchanger, and an evaporator.

[0004] According to the present invention, a variable channel folded flat tube includes: a sheet material, a flow channel, and a bending groove;

[0005] The sheet metal is bent at both ends along the width direction to form multiple bending grooves, and the multiple bending grooves at both ends form a first bending part and a second bending part, respectively.

[0006] The first bending point is set at the point where one end of the first bending part connects to the straight section of the sheet metal. The first bending part is folded around the first bending point to one side of the first bending part and fits into the straight section of the sheet metal. The third bending point is set at the point where the other end of the first bending part fits into the straight section of the sheet metal. The first bending part is folded around the third bending point to the other side of the first bending part and fits into the straight section of the sheet metal.

[0007] The second bending point is set at the point where one end of the second bending part connects to the straight section of the sheet metal. The second bending part is folded around the second bending point to one side of the second bending part and fits into the straight section of the sheet metal. The fourth bending point is set at the point where the other end of the second bending part fits into the straight section of the sheet metal. The second bending part is folded around the fourth bending point to the other side of the second bending part and fits into the straight section of the sheet metal.

[0008] The first bend and the second bend, together with the straight sections of the sheet metal on both sides, form multiple flow channels, and the cross-sectional area of ​​the multiple flow channels increases sequentially along the width direction of the sheet metal.

[0009] Preferably, the bending groove is trapezoidal.

[0010] Preferably, the end of the trapezoidal bending groove is set as a straight section, and the straight section of the bending groove is welded to the straight section of the sheet metal.

[0011] Preferably, after two folds, the ends of the first fold and the second fold are joined together.

[0012] Preferably, the length of the straight section of the sheet metal along the width direction is greater than or equal to twice the total length of the first and second bends.

[0013] Preferably, the bending groove extends along the length of the sheet material.

[0014] Preferably, the bending grooves on the first bend and the second bend are at the same height.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This application provides a folded flat tube with variable flow channel, which can gradually reduce the flow cross-sectional area in the outer fluid flow direction, increase heat exchange efficiency and improve the heat exchanger's heat exchange capacity. The processing technology of this folded flat tube is simple and saves material costs. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 A schematic diagram of the cross-sectional structure of a folded flat tube with variable channel;

[0019] Figure 2 A schematic diagram showing the bending groove created by bending a sheet metal.

[0020] Figure 3 This is a diagram illustrating the double folding process.

[0021] As shown in the figure:

[0022] Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figure 2-3As shown, in this embodiment, multiple bending grooves 310 are formed by bending the aluminum alloy coil or sheet 100 at both ends by stamping or rolling. The shape and size of the multiple bending grooves 310 decrease sequentially along the first bending groove 311, the second bending groove 312, the third bending groove 313, the fourth bending groove 314... the nth bending groove 31n. The bending grooves 310 at both ends are then bent inward for the first time through the first bending point 411 and the second bending point 412, and then bent inward for the second time through the third bending point 421 and the fourth bending point 422. Ultimately, the flow areas of the first flow channel 211, the second flow channel 212, the third flow channel 213, the fourth flow channel 214... and the nth flow channel 21n are formed in sequence. When the internal flow resistance and heat exchange need to be balanced, multiple flow channels 210 can be designed to decrease in size along the flow direction of the external fluid. According to the heat exchange principle, the external fluid and the flat tube exchange heat. The temperature of the external fluid gradually increases along the flow direction. The temperature difference between the external fluid and the flat tube wall decreases, which weakens the heat exchange. At this time, by reducing the flow area of ​​the flow channel 210 to form a larger heat exchange coefficient, the heat exchange is enhanced. At the same time, compared with the state of the nth flow channel 21n, which is composed entirely of smaller flow channels, the flow resistance requirements can be better met.

[0025] Specifically, such as Figure 1 As shown, this embodiment includes: a sheet metal 100, flow channels 210, and bending grooves 310; multiple bending grooves 310 are formed by bending the sheet metal 100 at both ends along its width direction, and the bending grooves 310 extend along the length direction of the sheet metal 100. The multiple bending grooves 310 at both ends respectively form a first bending portion and a second bending portion; the first bending portion and the second bending portion, together with the straight sections of the sheet metal 100 on both sides, form multiple flow channels 210, and the flow cross-sectional area of ​​the multiple flow channels 210 increases sequentially along the width direction of the sheet metal 100.

[0026] The first bending point 411 is set at the point where the first bending part connects to the straight section of the sheet 100. The first bending part is folded around the first bending point 411 until one side of the first bending part is in contact with the straight section of the sheet 100. The third bending point 421 is set at the point where the other end of the first bending part is in contact with the straight section of the sheet 100. The first bending part is folded around the third bending point 421 until the other side of the first bending part is in contact with the straight section of the sheet 100. The second bending part is connected to the sheet 100 at one end. The straight section 00 is set as the second bending point 412. The second bending part is folded around the second bending point 412 to one side of the second bending part and fits against the straight section of the sheet 100. The other end of the second bending part is set as the fourth bending point 422 where it fits against the straight section of the sheet 100. The second bending part is folded around the fourth bending point 422 to the other side of the second bending part and fits against the straight section of the sheet 100. After two folds, the ends of the first bending part and the second bending part fit together.

[0027] In one embodiment, the bending groove 310 is trapezoidal. The end of the trapezoidal bending groove 310 is set as a straight segment, and the straight segment of the bending groove 310 is welded to the straight segment of the sheet metal 100.

[0028] In one embodiment, the length of the straight section of the sheet 100 along the width direction is greater than or equal to twice the total length of the first and second bends, and the bending grooves 310 on the first and second bends are at the same height.

[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 variable channel, folded flat tube characterized by, The utility model relates to a kind of variable channel folded flat tube, including: Sheet metal (100), flow channel (210) and bending groove (310); Multiple bending grooves (310) are bent and processed in the width direction of the sheet metal (100) at both ends respectively, and the multiple bending grooves (310) at both ends form a first bending part and a second bending part respectively; The first bending part is connected to the flat section of the sheet metal (100) at one end and is provided as a first bending point (411), and the first bending part is folded around the first bending point (411) to the side of the first bending part that is attached to the flat section of the sheet metal (100), and the other end of the first bending part is provided with a third bending point (421) at the point where it is attached to the flat section of the sheet metal (100), and the first bending part is folded around the third bending point (421) to the other side of the first bending part that is attached to the flat section of the sheet metal (100); The second bending part is connected to the flat section of the sheet metal (100) at one end and is provided as a second bending point (412), and the second bending part is folded around the second bending point (412) to the side of the second bending part that is attached to the flat section of the sheet metal (100), and the other end of the second bending part is provided with a fourth bending point (422) at the point where it is attached to the flat section of the sheet metal (100), and the second bending part is folded around the fourth bending point (422) to the other side of the second bending part that is attached to the flat section of the sheet metal (100); The first bending part and the second bending part enclose the flat section of the sheet metal (100) on both sides to form multiple flow channels (210), and the flow cross-sectional area of the multiple flow channels (210) increases in turn along the width direction of the sheet metal (100).

2. The folding flat tube of variable channel according to claim 1, characterized in that: The bending groove (310) is trapezoidal.

3. The folding flat tube of variable channel according to claim 2, characterized in that: The end of the trapezoidal bending groove (310) is provided as a straight section, and the straight section of the bending groove (310) is welded to the flat section of the sheet metal (100).

4. The variable passage, folded flat tube of claim 1 wherein: After being folded twice, the first bending part and the second bending part are attached at the ends.

5. The variable passage, folded flat tube of claim 1 wherein: The length of the flat section of the sheet metal (100) along the width direction is greater than or equal to twice the total length of the first bending part and the second bending part.

6. The variable passage, folded flat tube of claim 1 wherein: The bending groove (310) extends along the length direction of the sheet metal (100).

7. The variable passage, folded flat tube of claim 1 wherein: The height of the bending groove (310) on the first bending part and the second bending part is the same.

8. An air conditioner condenser characterized by: The variable channel folded flat tube of any one of claims 1-7.

9. A heat exchanger, characterized by: The variable channel folded flat tube of any one of claims 1-7.

10. An evaporator characterized by: The variable channel folded flat tube of any one of claims 1-7.

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