WO2022166887A1 - Heat exchange tube and heat exchanger having same - Google Patents

Abstract

A heat exchange tube and a heat exchanger (200) having same. The heat exchange tube comprises a tube body (1), a tube body cavity (11), a first member (2) and a welding part (3). The tube body (1) comprises a first side wall (12) and a second side wall (13). A flat tube (100) further comprises a plurality of channels (16); the welding part (3) is positioned in at least one channel; on the cross section of the flat tube (100), the section of the welding part (3) is partially overlapped with the flow section of the channel, and is connected to the first side wall (12), the maximum height of the section of the welding part (3) in the height direction of the flat tube (100) is D, N*(Wb+0.2D) > 0.0017Wt ²+0.0175Wt+0.3713, or N*(Wb+0.2D) < 0.0119Wt ²+0.086Wt+2.9649, wherein the number of channels of the flat tube (100) is N, the thickness of the first member (2) is Wb, and the width of the flat tube (100) is Wt.

Description

Heat exchange tube and heat exchanger having the same

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202120340785.2 and the filing date of February 5, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The present disclosure relates to the technical field of heat exchange, and in particular, to a heat exchange tube and a heat exchanger having the heat exchange tube.

Background technique

In some applications in the field of refrigeration and air conditioning, heat exchange tubes are formed by folding one or more sheets. Usually, such heat exchange tubes formed by folding sheets are called folded flat tubes. Folded flat tubes are mainly used in heat exchangers. , while the partially folded flat tube is mainly composed of a tube body and inner fins, the inner fins divide the tube body into multiple channels, and the inner fins and the inner wall of the tube are connected by solder welding. When there is a lot of solder, it is easy to cause the channel to be blocked, thereby reducing the heat exchange performance of the heat exchanger.

SUMMARY OF THE INVENTION

To this end, one aspect of the present disclosure proposes a heat exchange tube, which effectively reduces the resistance on the side of the refrigerant, and is beneficial to improve the heat exchange performance of the heat exchanger.

Another aspect of the present disclosure proposes a heat exchanger having the heat exchange tube.

According to the heat exchange tube of the embodiment of the present disclosure, the heat exchange tube is a flat tube, the flat tube includes a tube body and a tube body cavity, and the tube body includes a first side wall and the second side wall; the flat tube includes a first piece, the flat tube further includes a plurality of channels, the plurality of channels are arranged at intervals in the width direction of the flat tube, and the length direction of the plurality of channels is Parallel to the length direction of the flat tube, part of the first piece is located between two adjacent channels; a welded part, the welded part is located in at least one of the channels; in the cross section of the flat tube On the other hand, the cross-section of the welded portion partially overlaps with the flow cross-section of the channel and is connected to the first side wall. The maximum height of the cross-section of the welded portion in the height direction of the flat tube is D, and the D The following conditions are met:

N*(Wb+0.2D)>0.0017Wt ² +0.0175Wt+0.3713; or

N*(Wb+0.2D)<0.0119Wt ² +0.086Wt+2.9649; wherein, the number of channels of the flat tube is N, the thickness of the first piece is Wb, and the width of the flat tube is Wt.

According to the heat exchange tube of the embodiment of the present disclosure, by arranging the first piece in the tube body cavity of the flat tube, the first piece can divide the tube body cavity into a plurality of channels arranged in the width direction of the flat tube, and the first piece can be welded by the welding part. The piece is connected with the first side wall of the flat tube and the second side wall of the flat tube, and the number of channels of the flat tube is defined as N, the thickness of the first piece is Wb, the width of the flat tube is Wt, and the cross section of the welded part is The maximum distance between the height direction of the flat tube and the first side wall is D, and the following formula is satisfied: N*(Wb+0.2D)>0.0017Wt ² +0.0175Wt+0.3713; or N*(Wb+0.2 D)<0.0119Wt ² +0.086Wt+2.9649, at this time, the heat exchange tube of the present disclosure effectively reduces the resistance of the refrigerant side, which is beneficial to improve the heat exchange performance of the heat exchanger.

In some embodiments, the height of the flat tube is H, the number of channels of the flat tube is N, the width of the flat tube is Wt, and the following conditions are satisfied: {(N-2)/20} ² * {(Wt-16)/16} ³ >0.05; H*Wt < 80.

In some embodiments, the height of the flat tube is H, the number of channels of the flat tube is N, the width of the flat tube is Wt, and the following conditions are satisfied: {(N-2)/20} ² * {(Wt-16)/16} ³ >0.3; H*Wt < 80.

According to the heat exchange tube of the embodiment of the present disclosure, the heat exchange tube is a flat tube, the flat tube includes a tube body and a tube body cavity, and the tube body includes a first side wall and the second side wall; the flat tube includes a first piece, the flat tube further includes a plurality of channels, the plurality of channels are arranged at intervals in the width direction of the flat tube, and the lengths of the plurality of channels are The direction is parallel to the length direction of the flat tube, and part of the first piece is located between two adjacent channels; a welding part, the welding part is located in at least one of the channels; in the transverse direction of the flat tube In cross-section, the cross-section of the welded portion partially coincides with the flow cross-section of the channel, and is connected to the first side wall. In the flow cross-section of the channel, the cross-section of the welded portion includes a contour line, and the contour line It includes a plurality of arc segments, the radius of curvature of the arc segments is R, and at least one of the R satisfies the following conditions:

N*(Wb+0.15R)>0.0017Wt ² +0.0175Wt+0.3713; or N*(Wb+0.15R)<0.0119Wt ² +0.086Wt+2.9649; wherein, the number of channels of the flat tube is N, The thickness of the first piece is Wb, and the width of the flat tube is Wt.

In some embodiments, the height H of the flat tube, the number of channels N of the flat tube and the width Wt of the flat tube satisfy the following conditions: {(N-2)/20} ² *{(Wt -16)/16} ³ >0.05;H*Wt<80.

In some embodiments, the height H of the flat tube, the number of channels N of the flat tube and the width Wt of the flat tube satisfy the following conditions: {(N-2)/20} ² *{(Wt -16)/16} ³ >0.3;H*Wt<80.

In some embodiments, the width Wt of the flat tube is smaller than 40 mm and larger than 16 mm, and the number N of channels of the flat tube is larger than 14.

In some embodiments, the width Wt of the flat tube is less than 36 mm and greater than 16 mm, and the number of channels of the flat tube is N greater than 20.

In some embodiments, the ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512.

In some embodiments, the D satisfies: 0.1<(H-4*D)/H<0.9.

The heat exchanger according to the embodiment of the present disclosure includes: a first tube and a second tube; the first tube and the second tube.

According to the heat exchanger of an embodiment of the present disclosure, the heat exchange tube is the heat exchange tube described in any of the above embodiments, and the heat exchange tube effectively reduces the resistance of the refrigerant side, which is beneficial to improve the heat exchange performance of the heat exchanger.

Description of drawings

FIG. 1 is a perspective view of a heat exchange tube according to one embodiment of the present disclosure.

FIG. 2 is a front view of the heat exchange tube in FIG. 1 .

FIG. 3 is an enlarged schematic view of part A in FIG. 2 .

4 is a perspective view of a heat exchange tube according to another embodiment of the present disclosure.

FIG. 5 is a front view of the heat exchange tube in FIG. 4 .

FIG. 6 is an enlarged schematic view of part B in FIG. 5 .

7 is a perspective view of a heat exchange tube according to yet another embodiment of the present disclosure.

FIG. 8 is a front view of the heat exchange tube in FIG. 7 .

FIG. 9 is an enlarged schematic view of part C in FIG. 8 .

10 is a perspective view of a heat exchange tube according to yet another embodiment of the present disclosure.

FIG. 11 is a front view of the heat exchange tube in FIG. 10 .

FIG. 12 is an enlarged schematic view of part D in FIG. 11 .

13 is a perspective view of a heat exchange tube according to yet another embodiment of the present disclosure.

FIG. 14 is a front view of the heat exchange tube in FIG. 13 .

FIG. 15 is an enlarged schematic view of part E in FIG. 14 .

16 is a perspective view of a heat exchange tube according to yet another embodiment of the present disclosure.

FIG. 17 is a front view of the heat exchange tube of FIG. 16 .

FIG. 18 is an enlarged schematic view of part F in FIG. 17 .

19 is a perspective view of a heat exchange tube according to yet another embodiment of the present disclosure.

FIG. 20 is a front view of the heat exchange tube of FIG. 19 .

FIG. 21 is an enlarged schematic view of part G in FIG. 20 .

22 is a schematic diagram of a heat exchanger according to an embodiment of the present disclosure.

Reference number:

Flat Tube 100,

Tube body 1, tube body cavity 11, first sub-chamber 111, second sub-chamber 112, first side wall 12, second side wall 13, third side wall 14, fourth side wall 15, channel 16, gap 17, The first part 2, the first part 21, the second part 22, the welding part 3,

Heat exchanger 200, first tube 201, second tube 202.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present disclosure and should not be construed as a limitation of the present disclosure.

As shown in FIGS. 1 to 18 , according to the heat exchange tube of the embodiment of the present disclosure, the heat exchange tube is a flat tube 100 .

The flat tube 100 includes a tube body 1 and a tube body cavity 11 . The tube body 1 includes a first side wall 12 and a second side wall 13 oppositely disposed along the height direction of the flat tube 100 (up and down direction as shown in FIG. 1 ). As shown in FIG. 1 , the flat tube 100 includes a first side wall 12 and a second side wall 13 arranged opposite to each other in the up-down direction, and a third side wall 14 and a fourth side wall 15 arranged opposite to each other in the left-right direction. The first side wall 12 , the second side wall 13 , the third side wall 14 and the fourth side wall 15 enclose the tube body cavity 11 of the flat tube 100 .

The flat tube 100 further includes a first part 2, the first part 2 is located in the tube body cavity 11, the first part 2 divides the tube body cavity 11 into a plurality of channels 16, and the plurality of channels 16 are in the width direction of the flat tube 100 (as shown in FIG. 1 ). The longitudinal direction of the plurality of channels 16 is parallel to the longitudinal direction of the flat tube 100 .

The welding portion 3 is located in at least one channel 16. As shown in FIG. 1, the first piece 2 is generally corrugated in the left-right direction, and at least part of the upper side surface of the first piece 2 is connected to the first side wall 12 by welding. At least a part of the lower side surface of the second side wall 13 is connected to the second side wall 13 by welding, and the welding part 3 is located between the first piece 2 and the first side wall 12 and the second side wall 13 .

In the cross section of the flat tube 100 , the cross section of the welded portion 3 partially overlaps with the flow cross section of the channel 16 and is connected to the first side wall 12 . The maximum height of the cross section of the welded portion 3 in the height direction of the flat tube 100 is D , the D satisfies the following conditions:

N*(Wb+0.2D)>0.0017Wt ² +0.0175Wt+0.3713; or

N*(Wb+0.2D)<0.0119Wt ² +0.086Wt+2.9649; wherein, the number of 16 channels of the flat tube 100 is N, the thickness of the first piece 2 is Wb, and the width of the flat tube 100 is Wt.

In the above formula, the units of Wb, Wt and D are all mm. At this time, the heat exchange tube of the present disclosure effectively reduces the resistance of the refrigerant side, which is beneficial to improve the heat exchange performance of the heat exchanger. At the same time, the flat tube 100 and the first piece 2 Formed from the same sheet.

Further, the heat exchange tube of the present disclosure can also improve the corrosion resistance of the heat exchange tube.

It can be understood that at least a part of the first piece 2 extends in the up-down direction in the tube body cavity 11 , and the thickness of the first piece 2 above refers to the part of the first piece 2 extending in the up-down direction in the tube body cavity 11 .

In some embodiments, the height of the flat tube 100 is H, the number of 16 channels of the flat tube 100 is N, and the width of the flat tube 100 is Wt, and the following conditions are met:

{(N-2)/20} ² *{(Wt-16)/16} ³ >0.05, H*Wt<80. At this time, the heat exchange tube of the present disclosure effectively reduces the resistance of the refrigerant side, which is beneficial to improve the heat exchange performance of the heat exchanger.

In some embodiments, the height of the flat tube 100 is H, the number of channels of the flat tube 100 is N, and the width of the flat tube 100 is Wt, and the following conditions are met:

{(N-2)/20} ² *{(Wt-16)/16} ³ >0.3;H*Wt<80. At this time, the heat exchange tube of the present disclosure effectively reduces the resistance of the refrigerant side, which is beneficial to improve the heat exchange performance of the heat exchanger. At the same time, the flat tube 100 is formed from one sheet, and the first piece 2 is formed from another sheet.

As shown in FIGS. 1 to 18 , according to the heat exchange tube of the embodiment of the present disclosure, the heat exchange tube is a flat tube 100 .

The flat tube 100 includes a tube body 1 and a tube body cavity 11 . The tube body 1 includes a first side wall 12 and a second side wall 13 oppositely disposed along the height direction of the flat tube 100 (up and down direction as shown in FIG. 1 ). As shown in FIG. 1 , the flat tube 100 includes a first side wall 12 and a second side wall 13 arranged opposite to each other in the up-down direction, and a third side wall 14 and a fourth side wall 15 arranged opposite to each other in the left-right direction. The first side wall 12 , the second side wall 13 , the third side wall 14 and the fourth side wall 15 enclose the tube body cavity 11 of the flat tube 100 .

The flat tube 100 further includes a first part 2, the first part 2 is located in the tube body cavity 11, the first part 2 divides the tube body cavity 11 into a plurality of channels 16, and the plurality of channels 16 are in the width direction of the flat tube 100 (as shown in FIG. 1 ). The longitudinal direction of the plurality of channels 16 is parallel to the longitudinal direction of the flat tube 100 .

The welding portion 3 is located in at least one channel 16. As shown in FIG. 1, the first piece 2 is generally corrugated in the left-right direction, and at least part of the upper side surface of the first piece 2 is connected to the first side wall 12 by welding. At least a part of the lower side surface of the second side wall 13 is connected to the second side wall 13 by welding, and the welding part 3 is located between the first piece 2 and the first side wall 12 and the second side wall 13 .

In the cross section of the flat tube 100 , the cross section of the welded portion 3 partially coincides with the flow cross section of the channel 16 and is connected to the first side wall 12 . In the flow cross section of the channel 16 , the cross section of the welded portion 3 includes a contour line , the contour line includes multiple arc segments, the radius of curvature of the arc segment is R, and at least one R satisfies the following conditions:

N*(Wb+0.15R)>0.0017Wt ² +0.0175Wt+0.3713; or

N*(Wb+0.15R)<0.0119Wt ² +0.086Wt+2.9649; wherein, the number of 16 channels of the channel 100 is N, the thickness of the first piece 2 is Wb, and the width of the flat tube 100 is Wt. The heat exchange tube of the present disclosure effectively reduces the side resistance of the refrigerant, which is beneficial to improve the heat exchange performance of the heat exchanger. At the same time, the curvature radius of the above-mentioned arc segment is R, so that the welding part 3 is between the flat tube 100 and the first piece 2 . The force structure is more reasonable and the welding effect is better. The flat tube 100 and the first piece 2 are formed from the same sheet.

In some embodiments, the height of the flat tube 100 is H, the number of 16 channels of the flat tube 100 is N, and the width of the flat tube 100 is Wt, and the following conditions are met:

{(N-2)/20} ² *{(Wt-16)/16} ³ >0.05;H*Wt<80. Therefore, the heat exchange tube can obtain good heat transfer performance while ensuring the design strength.

In some embodiments, the height of the flat tube 100 is H, the number of 16 channels of the flat tube 100 is N, and the width of the flat tube 100 is Wt, and the following conditions are met:

{(N-2)/20} ² *{(Wt-16)/16} ³ >0.3;H*Wt<80. At this time, the heat exchange tube of the present disclosure effectively reduces the side resistance of the refrigerant, which is beneficial to improve the heat exchange performance of the heat exchanger. At the same time, the flat tube 100 is processed and formed from one sheet material, and the first piece 2 is processed and formed from another sheet material. .

In some embodiments, as shown in FIGS. 1 to 18 , the width of the flat tube 100 is less than 40 mm and greater than 16 mm, and the number of channels 16 of the flat tube 100 is N greater than 14. It can be understood that the larger the width Wt of the flat tube 100 is, the greater the number of channels 16 in the flat tube 100 will be, which can effectively increase the heat exchange area of the flat tube 100 and improve the heat exchange capacity of the heat exchange tube. However, if the width Wt of the flat tube 100 is too large, the volume of the flat tube 100 will increase, which is not conducive to the installation of the flat tube 100 . The flat tube 100 and the first piece 2 are formed from the same plate.

In some embodiments, as shown in FIGS. 1 to 18 , the width of the flat tube 100 is less than 36 mm and greater than 16 mm, and the number of channels 16 of the flat tube 100 is N greater than 20. It can be understood that the larger the width Wt of the flat tube 100 is, the greater the number of channels 16 in the flat tube 100 will be, which can effectively increase the heat exchange area of the flat tube 100 and improve the heat exchange capacity of the heat exchange tube. However, if the width Wt of the flat tube 100 is too large, the volume of the flat tube 100 will increase, which is not conducive to the installation of the flat tube 100 . At the same time, the flat tube 100 is formed from one sheet, and the first piece 2 is formed from another sheet.

In some embodiments, the ratio of the height H of the flat tube 100 to the width Wt of the flat tube 100 is less than 0.0512. At this time, the flat tube 100 can obtain good heat transfer performance while ensuring the design strength.

In some embodiments, D satisfies: 0.1<(H-4*D)/H<0.9. It can be understood that, in the flat tube 100, the first piece 2 and the inner wall of the flat tube 100 are welded by the welding portion 3, and the larger D is, the greater the value of D, the higher the value of the welding portion used between the first piece 2 and the inner wall of the flat tube 100. The more welded parts 3, the stronger the connection between the first piece 2 and the inner wall of the flat tube 100, but the more welded parts 3, the smaller the flow area of the channel 16, which affects the heat exchange performance of the heat exchange tube. In the present disclosure, 0.1<(H-4*D)/H<0.9, so that the heat exchange tube can obtain good heat transfer performance while ensuring the design strength.

Specifically, as shown in FIG. 1 to FIG. 6 , there are two specific embodiments of the heat exchange tube.

As shown in Figures 1 to 3, the right side of the sheet is fixed, and the left side of the sheet is first bent to form the structure of the flat tube 100. At this time, the right side of the sheet is generally in contact with the middle section of the sheet, and the other Part of the corrugated structure is continuously bent in the tube body cavity 11 to form the first piece 2 . The first piece 2 and the flat tube 100 are welded together by the welding part 3 . At the same time, the right side of the flat tube 100 and the middle section of the flat tube 100 are welded together at the right side of the flat tube 100 .

As shown in FIG. 4 to FIG. 6 , the middle part of the plate is kept still, the left part of the plate is bent to the middle part of the plate, and the side part of the plate is bent to the middle part of the plate to form the flat tube 100 At this time, the tube body cavity 11 includes a first sub-lumen 111 and a second sub-lumen 112, and the first sub-lumen 111 and the second sub-lumen 112 are not connected. Continue to bend the left side of the plate in the first sub-cavity 111 to the left end of the first sub-cavity 111 to form the first sub-piece 21, and bend the right portion of the plate in the second sub-cavity 112 to the second sub-chamber 112. The right end of the cavity 112 is bent to form the second part 22 .

As shown in Fig. 7 to Fig. 12, there are two other specific embodiments of the heat exchange tube.

As shown in FIG. 7 to FIG. 9 , a plate is bent to form a flat tube 100 . Specifically, the right side of the plate does not move, and the left side of the plate is bent for a circle to form the flat tube 100 . The sides are connected, thereby forming the flat tube 100 .

The other plate is first bent into a first piece 2, and then the first piece 2 is welded in the tube body cavity 11, thereby forming a heat exchange tube.

As shown in FIG. 10 to FIG. 12 , a plate is bent to form a flat tube 100 . Specifically, the middle section of the plate remains stationary, and the left and right sides of the plate are both directed toward the middle section of the plate. The flat tube 100 is formed by bending and the left and right sides of the one sheet meet substantially at the centerline of the one sheet. Wherein, there are gaps 17 between the left side and the right side of the piece of board and the middle part of the piece of board.

The other plate is first bent into a first piece 2, and then the first piece 2 is welded in the tube body cavity 11, thereby forming a heat exchange tube. Therein, the middle section of the other sheet can be welded in the gap 17 .

As shown in Fig. 13 to Fig. 18, there are two more specific embodiments of the heat exchange tube.

As shown in FIG. 13 to FIG. 15 , the first plate is bent to form the flat tube 100 . Specifically, the middle section of the first plate remains stationary, and the left and right sides of the first plate are directed toward the first plate. The middle section of the sheet is bent, and the left and right sides of the first sheet meet substantially at the centerline of the first sheet, thereby forming the flat tube 100 . Wherein, the left side and right side of the first plate are connected to the middle part of the first plate, so that the first plate divides the tube cavity 11 into a first sub-cavity 111 and a second sub-cavity 112 .

The second plate and the third plate are respectively bent into a first part 21 and a second part 22, the first part 21 is welded in the first sub-cavity 111, and the second part 22 is welded in the second sub-cavity within 112.

As shown in FIG. 16 to FIG. 18 , the first plate and the second plate are connected to form a flat tube 100. Specifically, the first plate and the second plate have the same structure, and the left end of the first plate is connected to the second plate. The left ends of the plates are connected, and the right end of the first plate is connected to the right end of the second plate, thereby forming the flat tube 100 .

The third plate is first bent into a first piece 2, and then the first piece 2 is welded in the tube body cavity 11, thereby forming a heat exchange tube.

As shown in FIGS. 19 to 21 , the first plate is bent to form the flat tube 100 . At this time, the tube body cavity 11 includes a first sub-cavity 111 and a second sub-cavity 112 , and the first sub-cavity 111 and the second sub-cavity 112 not connected.

There are two pieces of the first piece 2 , and the two pieces of the first piece 2 are respectively disposed in the first sub-cavity 111 and the second sub-cavity 112 , wherein the first piece 2 is bent at a right angle when it is bent.

As shown in FIG. 22 , the heat exchanger 200 according to the embodiment of the present disclosure includes a first tube 201 and a second tube 202 .

Specifically, as shown in FIG. 22 , the structures of the first tube 201 and the second tube 202 are generally the same, the first tube 201 and the second tube 202 both extend in the front-rear direction, and the first tube 201 and the second tube 202 are parallel to each other .

The plurality of heat exchange tubes are the heat exchange tubes described in any one of the embodiments of the present disclosure, and the heat exchange tubes communicate with the first tube 201 and the second tube 202 . One end of the plurality of heat exchange tubes (such as the left end of the heat exchange tube shown in FIG. 22 ) is connected to the first tube 201 , and the other end of the plurality of heat exchange tubes (such as the right end of the heat exchange tube shown in FIG. 22 ) connected to the second tube 202 . The heat exchange tube is the flat tube 100 .

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the indicated devices or elements It must have, be constructed, and operate in a particular orientation, and therefore should not be construed as a limitation of the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In the present disclosure, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

In the present disclosure, unless expressly stated and defined otherwise, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or indirectly through an intermediary between the first and second features touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., mean a specific feature, structure, material, or Features are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present disclosure, and those of ordinary skill in the art may Embodiments are subject to variations, modifications, substitutions and variations.

Claims (11)

1. A heat exchange tube, characterized in that the heat exchange tube is a flat tube,

   The flat tube includes a tube body and a tube body cavity, and the tube body includes a first side wall and a second side wall arranged along the height direction of the flat tube;

   The flat tube includes a first piece, the flat tube further includes a plurality of channels, the plurality of channels are arranged at intervals in the width direction of the flat tube, and the length direction of the plurality of channels is the same as that of the flat tube. The length directions of the parts are parallel, and part of the first piece is located between two adjacent channels;

   a welded portion, the welded portion being located in at least one of the passages;

   On the cross-section of the flat tube, the cross-section of the welded portion partially coincides with the flow cross-section of the channel and is connected to the first side wall, and the cross-section of the welded portion is in the height direction of the flat tube The maximum height is D, which satisfies the following conditions:

   N*(Wb+0.2D)>0.0017Wt ² +0.0175Wt+0.3713; or

   N*(Wb+0.2D)<0.0119Wt ² +0.086Wt+2.9649;

   The number of channels of the flat tube is N, the thickness of the first piece is Wb, and the width of the flat tube is Wt.
2. The heat exchange tube according to claim 1, wherein the height of the flat tube is H, the height H of the flat tube, the number of channels N of the flat tube and the width wt of the flat tube, The following conditions are met:

   {(N-2)/20} ² *{(Wt-16)/16} ³ >0.05;

   H*Wt<80.
3. The heat exchange tube according to claim 1, wherein the height of the flat tube is H, the height H of the flat tube, the number of channels N of the flat tube and the width wt of the flat tube, The following conditions are met:

   {(N-2)/20} ² *{(Wt-16)/16} ³ >0.3;

   H*Wt<80.
4. The heat exchange tube according to claim 1, wherein the D satisfies: 0.1<(H-4*D)/H<0.9.
5. A heat exchange tube, characterized in that the heat exchange tube is a flat tube,

   The flat tube includes a tube body and a tube body cavity, and the tube body includes a first side wall and a second side wall arranged along the height direction of the flat tube;

   The flat tube includes a first piece, the flat tube further includes a plurality of channels, the plurality of channels are arranged at intervals in the width direction of the flat tube, and the length direction of the plurality of channels is the same as that of the flat tube. The length direction of the tube is parallel, and part of the first piece is located between two adjacent channels;

   a welded portion, the welded portion being located in at least one of the passages;

   On the cross-section of the flat tube, the cross-section of the welded portion partially coincides with the flow cross-section of the channel and is connected to the first side wall. In the flow cross-section of the channel, the cross-section of the welded portion includes A contour line, the contour line includes a plurality of arc segments, the radius of curvature of the arc segments is R, and at least one of the R satisfies the following conditions:

   N*(Wb+0.15R)>0.0017Wt ² +0.0175Wt+0.3713; or

   N*(Wb+0.15R)<0.0119Wt ² +0.086Wt+2.9649;

   The number of the channels is N, the thickness of the first piece is Wb, and the width of the flat tube is Wt.
6. The heat exchange tube according to claim 5, wherein the height of the flat tube is H, the width H of the flat tube, the number of channels N of the flat tube, and the width Wt of the flat tube, The following conditions are met:

   {(N-2)/20} ² *{(Wt-16)/16} ³ >0.05;

   H*Wt<80.
7. The heat exchange tube according to claim 5, wherein the height of the flat tube is H, the width H of the flat tube, the number of channels N of the flat tube and the width of the flat tube are Wt , which satisfies the following conditions:

   {(N-2)/20} ² *{(Wt-16)/16} ³ >0.3;

   H*Wt<80.
8. The heat exchange tube according to any one of claims 1 to 7, wherein the width Wt of the flat tube is less than 40 mm and greater than 16 mm, and the number N of channels of the flat tube is greater than 14.
9. The heat exchange tube according to any one of claims 1 to 7, wherein the width Wt of the flat tube is less than 36 mm and greater than 16 mm, and the number N of channels of the flat tube is greater than 20.
10. The heat exchange tube according to any one of claims 2, 3, 6 or 7, wherein the ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512.
11. A heat exchanger, characterized in that, comprising:

    the first tube and the second tube;

    A heat exchange tube, wherein the heat exchange tube is the heat exchange tube according to any one of claims 1 to 10, and the heat exchange tube communicates with the first tube and the second tube.

Images