WO2019011058A1 - Heat exchanger - Google Patents

Abstract

A heat exchanger and a heat exchange system. The heat exchanger comprises a plurality of flat tubes (30) having heat exchange passages through which a heat exchange medium flows, and a first header (10) and a second header (20) which are connected to the ends of the plurality of flat tubes (30) and arranged side by side; cavities of the first header (10) and the second header (20) are in communication with the heat exchange passages of the flat tubes (30), each flat tube (30) comprising a main body section (311), an end section (313) and a torsion section (322) connected therebetween, the main body section (311) and the end section (313) being straight sections, the first header (10) and the second header (20) being provided with mounting holes (14, 24), the end sections (313) being inserted into and connected to the mounting holes (14, 24), and the length direction of the mounting holes (14, 24) is at an angle with but not perpendicular to the axis of the first header (10) or the second header (20). Therefore, the diameter of the headers does not need to be larger than the width of the flat tubes (30), facilitating the reduction of the tube diameter of the headers, so as to increase the compressive strength thereof.

Description

Heat Exchanger

Cross-reference to related applications

This patent application claims that the application number is 2017208473248, the invention name is "heat exchange tube, header, heat exchanger and refrigeration system" submitted on July 13, 2017, and the application number is submitted on December 1, 2017. For the 2017216512259, the invention name is "heat exchanger and heat exchange system" submitted on December 1, 2017, application number is 2017216520819, the invention name is "heat exchanger and heat exchange system" and submitted on January 4, 2018. The priority of the Chinese Patent Application No. 2018200128494, entitled "Heat Exchanger and Heat Exchange System", the entire contents of which are hereby incorporated by reference.

Technical field

This application relates to the field of heat exchange, and more particularly to heat exchangers.

Background technique

With the continuous development of new energy vehicles, the application of environmentally friendly refrigerant CO2 in automotive air conditioning systems has attracted the attention of researchers in this field. CO2 has obvious advantages in low greenhouse effect index (GMP=1), low ozone depletion potential (ODP=0), non-flammability, non-toxicity and stable chemical properties. The latent heat of evaporation of CO2 is relatively large, and the refrigeration capacity per unit volume is quite high, so the size of the compressor and components is small, but the heat removal and heat absorption process of CO2 is carried out under the transcritical state, and the heat exchanger that requires it as the heat exchange medium is required. The higher the pressure resistance, the smaller the diameter of the collecting pipe, the stronger the pressure resistance of the heat exchanger.

Summary of the invention

According to the first aspect of the embodiments of the present application, there is provided a heat exchanger capable of solving the problem of insufficient pressure resistance of the heat exchanger by reducing the diameter of the header.

The heat exchanger includes a header and a flat tube;

The flat tube includes a generally flat body section and a first end section and a second end section interposed to the header, the first end section and the second end section being ipsilateral with respect to the body section The angle between the plane defined by the longitudinal direction and the width direction of the main body segment and the plane defined by the longitudinal direction and the width direction of the first end segment and the second end segment is α, α ≠ 90° ;

The collecting pipe is provided with a mounting hole, at least a part of the first end section and at least part of the second end section are inserted into the mounting hole, and a length direction of the main body section is opposite to the collecting pipe The axis is substantially perpendicular, and the angle between the longitudinal direction of the mounting hole and the axis of the header is β, β≠90°

Optionally, an angle between a plane defined by a length direction and a width direction of the main body segment and a plane defined by a length direction of the end section and a width direction is α, 15°≤α<40°; The angle between the longitudinal direction of the mounting hole and the axis of the collecting pipe is β, 50° < β ≤ 75°.

Optionally, the two ends of the end sections of the flat tube are substantially parallel to the two planes defined by the length direction and the width direction.

Optionally, a plane defined by a length direction and a width direction of the body segment is substantially perpendicular to an axis of the first header or an axis of the second header.

Optionally, the heat exchanger further includes a partition, the collecting tube is provided with a partition groove, the partition is inserted into the partition groove, and the collecting tube is divided into two or two More than one isolated chamber.

Optionally, the header includes a first header and a second header, the first header is provided with a partition slot, and the partition is inserted into the partition slot. Dividing the first header into mutually independent first and second chambers;

a plurality of the flat tube stacks constituting a core for heat exchange, the core portion including a first core portion composed of a part of the plurality of flat tubes, and a portion composed of another one of the plurality of flat tubes Two core parts;

One end of the flat tube of the first core is inserted into the first header, such that a heat exchange passage of the flat tube communicates with the first chamber; and one end of the flat tube of the second core is inserted The first header allows the heat exchange passage of the flat tube to communicate with the second chamber.

Optionally, the core further includes a third core formed by a third portion of the plurality of flat tubes, the partition separating the second header into a third chamber that is isolated from each other and Fourth cavity

Wherein the other end of the flat tube in the first core portion is inserted into the second header so that the heat exchange passage of the flat tube communicates with the third chamber; the flat tube of the second core The other end is inserted into the second header so that the heat exchange passage of the flat tube communicates with the third chamber; the heat exchange passage of the flat tube of the third core communicates with the second chamber Said fourth cavity.

Optionally, the longitudinal direction of the baffle groove is not perpendicular to the axis of the first header or the axis of the second header.

Optionally, the length direction of the mounting hole in the first header is substantially parallel to the partition slot; or the length direction of the mounting hole in the second header is substantially the length of the spacer slot The directions are generally parallel.

Optionally, the partition comprises a first surface and a second surface of a relatively large area, and a first side and a second side adjacent to the first side and the second side; wherein the first side and the first side The two sides are parallel, the perpendicular of the first side of the partition is not perpendicular to the perpendicular of the first side and the second side, and the perpendicular of the second side of the partition is opposite to the first side and the second side The vertical lines are not perpendicular.

Optionally, the heat exchanger further includes an input member and an output member;

The inlet includes an associated tube portion and a dispensing portion extending from a first end of the first header to a second chamber, the dispensing portion being disposed adjacent to the second chamber, internally disposed a flow channel disposed along a longitudinal direction of the first header and a plurality of distribution holes disposed along a length of the flow channel, the distribution hole communicating the flow channel and the second cavity, and the pipe portion is connected to the flow channel through;

The output member is disposed at the first end of the first header and communicates with the first chamber of the first header.

Optionally, the heat exchanger further includes a distribution pipe, the first and second headers have opposite first and second ends along the length direction, and the third cavity is closer to the first cavity than the fourth cavity The first end of the second header, the distribution tube is connected to the fourth chamber through the third chamber from the first end of the second header;

The partition inserted into the partition groove of the second header is an open partition.

Optionally, the heat exchanger further includes a connecting body, and a third collecting pipe and a fourth collecting pipe disposed side by side, the axes of the third collecting pipe and the fourth collecting pipe are substantially parallel, And the third and fourth headers are disposed at a predetermined distance from the first and second headers; the connecting body is disposed between the gaps formed by the two collector tubes arranged side by side, and arranged side by side Two headers are connected by the connector.

Optionally, the third header and the fourth header are provided with mounting holes for inserting the end segments;

The core portion includes a fourth core portion composed of a part of the plurality of flat tubes, and a fifth core portion composed of another one of the plurality of flat tubes;

The partition divides the first header into first and second chambers that are isolated from each other, and divides the second header into third and fourth chambers that are isolated from each other; wherein a portion of the flat tube of the fourth core communicates with the inner cavity of the first chamber and the third header; another portion of the flat tube of the fourth core communicates with the second chamber and the third header a lumen; a portion of the flat tube of the fifth core communicates with the lumen of the third chamber and the fourth header; another portion of the fifth tube of the fifth core communicates with the fourth chamber and An inner cavity of the four headers; and the connector communicates with the second and fourth chambers.

Optionally, the connecting body is disposed adjacent to the second cavity and the fourth cavity, and a plurality of through holes configured to communicate the second cavity and the fourth cavity are disposed along a length direction of the connecting body.

Optionally, the connecting body is disposed between the first header and the second header, and the first and second headers are both cylindrical, the connecting body and the connecting body The surfaces of the first and second headers are all curved concave surfaces.

Optionally, the heat exchanger further includes a connecting body between the third header and the fourth header.

Optionally, the third and fourth headers are all cylindrical, and the surface of the connecting body that is in contact with the third and fourth headers is a curved concave surface.

In the heat exchanger of the above embodiment, the flat tube has a torsion section near both ends of the header, and the flat tube is twisted and twisted obliquely to the header so that the diameter (diameter) of the header does not need to be larger than the width of the flat tube It is beneficial to reduce the diameter of the collecting pipe. When the same material of the collecting pipe has the same wall thickness, it is beneficial to increase the compressive strength of the collecting pipe.

Additional aspects and advantages of the invention will be set forth in the description which follows.

DRAWINGS

1A to 13 are schematic views showing the structure of a heat exchanger according to an exemplary embodiment of the present application; and Figs. 14 to 21 are schematic views showing the structure of a heat exchanger according to another embodiment. among them:

FIG. 1A is a schematic structural diagram of a heat exchanger 100 according to an exemplary embodiment of the present application;

1B is a schematic structural view of a distribution portion 512 of the heat exchanger 100 shown in FIG. 1A;

2A is a schematic structural view of the heat exchanger 100 of FIG. 1A provided with another inlet 52;

2B is a schematic structural view of an inlet 52 of the heat exchanger 100 of FIG. 2A;

3 is a schematic structural view of the heat exchanger 100 of FIG. 1A provided with a distribution pipe 53;

Figure 4 is a side view of the heat exchanger 100 of Figure 3;

FIG. 5A is a schematic perspective view of the flat tube 30; FIG.

Figure 5B is a side view of the flat tube 30;

Figure 5C is a front elevational view of the flat tube 30;

Figure 5D is a plan view of the flat tube 30;

6 is a partial structural schematic view of the first header 10;

Figure 7 is a partial structural view of the flat tube 30;

Figure 8 is a schematic view showing another perspective of a partial structure of the flat tube 30 shown in Figure 7;

Figure 9 is a schematic view of another perspective view of a portion of the structure of the first header 10 of Figure 6;

Figure 10 is a schematic view showing a part of the structure of the heat exchanger shown in Figure 1;

11A is a schematic perspective view of a separator 40;

11B is a schematic structural view of another perspective view of the separator 40;

Figure 11C is a plan view of the partition 40;

Figure 11D is a side view of the partition 40;

Figure 12 is a schematic perspective view of a perforated partition;

FIG. 13 is a schematic structural view of the distribution pipe 53.

FIG. 14 is a schematic structural diagram of another heat exchanger 200 according to an exemplary embodiment of the present application;

Figure 15 is a partial structural view of the heat exchanger 200 shown in Figure 14;

Figure 16A is a plan view of the heat exchanger 200 of Figure 14;

Figure 16B is a front elevational view of the heat exchanger 200 of Figure 14;

Figure 16C is a bottom plan view of the heat exchanger 200 of Figure 14;

16D is a schematic structural view showing the connection of the first header 10 and the second header 20;

Figure 17A is an exploded view of a portion of the structure of the heat exchanger 200 of Figure 14;

17B is a schematic structural view of the connecting body 81;

17C is a schematic structural view of the second header 20;

Figure 18A is an exploded view of another portion of the structure of the heat exchanger 200 of Figure 14;

18B is a schematic structural view of the connecting body 82;

18C is a schematic structural view of the fourth header 70;

19A to 19D are schematic views showing the structure of a flat tube twisted on the same side;

Figure 19A is a schematic view showing the structure of the flat tube before being twisted;

Figure 19B is a schematic structural view showing a partial twist of the flat tube;

Figure 19C is another schematic view of the partial twisting of the flat tube;

Figure 19D is a schematic structural view of the flat tube after being twisted;

Figure 20 is a schematic view showing the structure of a flat tube twisted by a different side;

Figure 21 is a schematic view showing the structure of another separator shown in an exemplary embodiment of the present application.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with aspects of the present application as detailed in the appended claims.

The terminology used in the present application is for the purpose of describing particular embodiments, and is not intended to be limiting. The singular forms "a", "the" and "the"

It should be understood that the terms "first", "second", and <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; Similarly, the words "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one; similarly, the "multiple" referred to in this application means two if not explicitly stated. And more than two. Unless otherwise indicated, the terms "front", "rear", "lower" and/or "upper" are used for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises" or "comprises" or "comprises" or "an" Or an object.

The heat exchanger and heat exchange system of the exemplary embodiment of the present application will be described in detail below with reference to the accompanying drawings. The features of the embodiments and embodiments described below may be complementary to each other or combined with each other without conflict.

1 to 13 are schematic structural views of a heat exchanger 100 of an exemplary embodiment of the present application. The heat exchanger 100 can be applied in various types of heat exchange systems such as air conditioners. The heat exchanger 100 mainly exchanges heat through the refrigerant inside the heat exchanger and the air flowing outside the heat exchanger to provide a relatively comfortable ambient temperature.

Referring to FIG. 1 and referring to FIGS. 2 to 13 as necessary, the heat exchanger 100 includes a core for heat exchange formed by laminating a plurality of flat tubes 30, and is connected to the ends of the plurality of flat tubes 30. And the first header 10 and the second header 20 are arranged side by side.

The flat tube 30 is a microchannel flat tube, that is, the flat tube 30 is internally provided with a microchannel. The heat exchanger 30 includes a first tube portion 31, a second tube portion 32, and a bent portion 33 connecting the first tube portion 31 and the second tube portion 32 (which may be combined with FIG. 5). Of course, the flat tube 30 may not be a microchannel flat tube, that is, the channel inside the flat tube is not a microchannel. It should be noted that the first tube 31, the third tube portion 33 and the second tube portion 32 of the flat tube 30 are of an integral structure, that is, each flat tube 30 described herein is formed by bending a flat tube.

At least one of the first tube portion 31 and the second tube portion 32 includes a body section, a distal section, and a torsion section connecting the body section and the end section. It should be noted that in the heat exchanger, the main body section is the main heat exchange area. Thus, the length of the body segment is typically much larger than the torsional and distal segments. For example, the first tube portion 31 and the second tube portion 32 each include a main body portion, a final portion, and a torsion portion, and the first tube portion 31 includes a main body portion 311, a final portion 313, and a main body portion 311 connected thereto. The torsional section 312 of the end section 313. The second tube portion 32 includes a body section 321 , a final section 323 , and a torsion section 322 connecting the body section 321 and the end section 323 . Wherein, the main body segments 311, 321 and the end segments 313, 323 are straight segments that are not twisted and deformed.

In a specific implementation process, the torsion section 312 can be formed by twisting the originally straight heat exchange tube region, that is, the main body section 311, the torsion section 312, and the end section 313 are an integral structure. Among them, the direction of twisting can be either clockwise or counterclockwise.

Further, taking the first tube portion 31 as an example, the torsion portion 312 formed by twisting forms an angle α between the plane of the main body segment 311 and the plane of the end portion 313. More precisely, the angle α is the angle between the plane S1 defined by the longitudinal direction L3 and the width direction W3 of the body segment 311 and the plane S2 determined by the length direction of the end segment 313 and the width direction (can be combined with FIG. 7 And Figure 8). The angle α is also referred to as the twist angle α. The inventor combined with his own accumulated production and processing technology experience, through mathematical modeling and model optimization calculation and analysis, the best recommended range of the torsion angle α is: 15 ° ≤ α < 40 °.

Further, the first header 10 is provided with a mounting hole 14, and the second header 20 is provided with a mounting hole 24, and the two end sections 313 and 323 of each of the flat tubes 30 are respectively inserted Within the mounting holes 14 and 24.

Further, the heat exchanger 100 further includes a partition 40. Correspondingly, the first header 10 is provided with a partition groove 15, the partition 40 is inserted into the partition groove 15, and the first header 10 is divided into two first isolated ones. The cavity 11 and the second cavity 12. Further, the core portion includes a first core portion 301 composed of a part of the plurality of flat tubes 30, and a second core portion 302 composed of another one of the plurality of flat tubes 30. One end of the flat tube 30 constituting the first core portion 301 communicates with the chamber at which the other end of the first chamber 11 communicates with the second header tube 20, and one end of the flat tube 30 constituting the second core portion 302 communicates with each other. The other end of the chamber of the second header 20 communicates with the second chamber 12 of the first header 10.

Further, the first cavity 11 of the first header 10 communicates with the inlet of the heat exchanger 100 into the heat exchanger 100, and the second cavity 12 of the second header 10 communicates with the heat exchanger The medium flows out of the outlet of the heat exchanger 100, so that the heat exchange medium enters the second header 20 from the inlet into the first chamber 11 of the first header 10 and exchanges heat through the first core 301. After flowing through the second core portion 302, the second core portion 302 flows into the second chamber 12 and flows out from the outlet that communicates with the second chamber 12. Furthermore, a four-flow arrangement of the heat exchange medium in the heat exchanger is achieved. (Can be combined with FIG. 1A, FIG. 1B, FIG. 2A and FIG. 2B)

Further, the heat exchanger 100 further includes an inlet 51 (which may be combined with FIG. 1A) or 52 (which may be combined with FIG. 2A) and an outlet 56. The first and second headers 10, 20 have opposite first and second ends 101, 103 in the longitudinal direction, and the first chamber 11 is closer to the first of the first header 10 than the second chamber 12 End 101. End caps 19 may be disposed at both ends of the first and second headers 10, 20 to close the header. The end cap 19 may be integrally formed with the header or may be provided independently. The end cap 19 can be a built-in end cap or an outer end cap. This application does not limit this. It can be set according to the specific application environment. The inlet 51 includes an associated tube portion 511 and a dispensing portion 512. The tube portion 511 extends from the first end 101 of the first header 10 to the second chamber 12. The distribution portion 512 is disposed adjacent to the second chamber 12, and is internally provided with a flow path 5122 disposed along the longitudinal direction of the first header 10 and a plurality of distribution holes 5121 disposed along the length of the flow path (in conjunction with FIG. 1B). The dispensing aperture 5121 can be a circular aperture or a waisted aperture. Corresponding to these distribution holes 5121, a plurality of through holes (not shown) are formed in the wall of the first header 10 at the second chamber 12. The tube portion 511 can be inserted into the flow path 5122 of the inlet member 51. The distribution hole 5121 communicates with the flow path 5122 and the second chamber 12 such that the refrigerant entering from the tube portion 511 is substantially uniformly distributed into the second chamber 12 through the respective distribution holes. The distribution portion 512 may be a block member that is independent of the tube portion 511. The distribution portion 512 may be disposed between the first header 10 and the second header 20. The first and second headers 10, 20 are each cylindrical, and correspondingly, the surfaces (not shown) of the distribution portion 512 that are in contact with the first and second headers 10, 20 are curved concave surfaces. The first and second headers 10, 20 may be fixed to the surface of the dispensing portion 512 by welding (for example, brazing). The block-shaped distribution portion 512 can support the first header 10 and the second header 20 on both sides to improve the stability of the product.

The inlet member 52 is tubular in its entirety and includes an outer tube portion 521 and an inner tube portion 522 (which may be combined with FIG. 2B). The outer tube portion 51 is disposed outside the first and second headers 10, 20 and extends from the first end 101 of the first header 10 in the longitudinal direction of the first header 10 to the second end 103. One end of the inner tube portion 522 is connected to the outer tube portion 521, and the other end enters the second chamber 12 through the end cap 19 at the second end 103.

The outlet 56 is disposed at the first end 101, for example, insertable into the first cavity 11 through the end cap 19 at the first end 101. The inlet member 51 or 52 and the outlet member 56 are disposed on the same side of the header (at the first end 101 of the first and second headers 10, 20), which facilitates the installation of the heat exchanger 100 and also reduces The installation space is conducive to the reduction of volume.

Further, the second header 20 of the heat exchanger 100 is provided with a baffle groove 25, the baffle 40 is inserted into the baffle groove 25, and the second header 20 is divided into two Separated chambers. Among them, the partition grooves 15 and 25 are staggered. (Can be combined with Figures 3 and 4)

Further, the core portion includes a first core portion 301 composed of a part of the plurality of flat tubes 30, a second core body 302 composed of another one of the plurality of flat tubes 30, and a A third core portion 303 composed of the remaining portion of the plurality of flat tubes 30 is described.

Correspondingly, the partition 40 divides the first header 10 into a first chamber 11 and a second chamber 12 that are isolated from each other, and divides the second header 20 into a third chamber 21 that is isolated from each other. And a fourth cavity 22 (which can be combined with Figures 3, 4 and 10). The flat tube 30 in the first core portion 301 communicates with the first chamber 11 and the third chamber 21. The flat tube 30 of the second core 302 communicates with the third chamber 21 and the second chamber 12. The flat tube 30 of the third core portion 303 communicates with the second chamber 12 and the fourth chamber 22.

Further, the baffle grooves 15, 25 may be two or more, and an arrangement of more flow of the heat exchange medium in the heat exchanger 100 is achieved.

In the above scheme, the arrangement of the separator increases the length of the refrigerant passage inside the heat exchanger, which is beneficial to improve the heat exchange efficiency of the heat exchanger.

In an embodiment, still taking the first header 10 as an example, the longitudinal direction of the mounting hole 14 is not perpendicular to the axis R1 of the first header 10 (which may be combined with FIGS. 6 and 9). The longitudinal direction of the mounting hole 14 forms an angle β with the axis R1 of the first header 10. The plane S1 defined by the longitudinal direction L3 of the main body section 311 and the width direction W3 may generally be perpendicular to the axis R1 of the header 10. This makes the sum of the included angle β and the aforementioned angle α equal to 90 degrees. Correspondingly, the inventor has found that the best recommended range of angle β is: 50° < β ≤ 75°. The plane S1 is perpendicular to the structure of the header 10, which facilitates the circulation of air between the flat tubes, thereby facilitating the heat exchange efficiency of the heat exchanger. Through such an inclined arrangement of the mounting holes 14, the flat tubes 30 are obliquely inserted into the headers (including the first headers 10 and the second headers 20), so that the diameter (diameter) of the headers is not required It is larger than the width of the flat tube, which is advantageous for reducing the diameter of the collecting tube, thereby facilitating the improvement of the compressive strength of the flat tube. At the same time, it is advantageous to reduce the volume and weight of the header.

The longitudinal direction of the partition groove 15 is not perpendicular to the axis R1 of the header 10. The longitudinal direction of the partition groove 15 is at an angle to the axis R1 of the header 10. In an alternative embodiment, the longitudinal direction of the baffle slot 15 is substantially parallel to the longitudinal direction of the mounting aperture 14 (which may be combined with Figures 6 and 9). That is, the angle between the longitudinal direction of the partition groove 15 and the axis R1 of the header 10 is also β. This design is advantageous for reducing the distance between the flat tubes on both sides of the partition groove, so that the structure of the heat exchanger is more compact and the volume of the heat exchanger is reduced.

The partition 40 includes a first outer face 41 and a second face 42 of relatively large area, and a first side 43 and a second side 44 that abut the first and second faces (which may be combined with Figures 11A-11D). In an embodiment, the width direction W2 of the partition groove 15 is parallel to the axis R1 of the header 10. Typically, the first face 41 and the second face 42 are substantially parallel, and the perpendicular V1 of the first side face 43 is substantially parallel to the perpendicular V2 of the second side face 44. Correspondingly, the perpendicular line V1 of the first side surface 43 of the partition is not perpendicular to the perpendicular line V3 of the first surface 41 and the second surface 42; the perpendicular line V2 of the second side surface 44 of the partition plate and the first surface 41 The perpendicular line V3 of the second face 42 is not perpendicular to each other. The first side 43 is at an angle to the first face 41 (or the second face 42) and is not perpendicular. Similarly, the second side 44 is also at an angle to the first side 41 (or the second side 42) and is not perpendicular. a portion of the first side face 43 , the second side face 44 , the first face 41 , and the second face 42 that is in contact with each groove face of the partition groove 15 when the partition plate 40 is inserted into the partition groove 15 It can be bonded to each of the groove faces. Of course, in other embodiments, the width direction W2 of the baffle groove and the axis of the collecting pipe may not be parallel, which is not specifically limited in the present application.

In an embodiment, the heat exchanger 100 includes a dispensing tube 53 (which may be combined with Figures 3 and 4). . The third chamber 21 is closer to the first end 101 of the second header 10 than the fourth chamber 22, and the distribution tube 53 communicates from the first end 101 through the third chamber 21 to the fourth Cavity 22. The distribution pipe 53 is provided with a plurality of distribution holes 531 (which can be combined with FIG. 13). When the refrigerant is introduced into the fourth chamber 22 through the distribution pipe distributing pipe 53, the refrigerant is distributed into the fourth chamber 22 through the distribution hole 531, so that the refrigerant distribution is more uniform, thereby facilitating the heat exchange efficiency of the heat exchanger. At the same time, the arrangement of the distribution pipe 53 is such that the interface of the refrigerant into and out of the heat exchanger 100 is located on the same side of the heat exchanger 100, facilitating installation in a narrow space. Correspondingly, the partition 40 inserted into the partition groove 25 is an open partition. For example, the partition 40 also includes a hole 45 through which the dispensing tube 53 can pass (which can be combined with Figure 12). It should be noted that the hole 45 is disposed at one end of the partition 40 away from the flat tube 30 to reduce the interference between the distribution tube 53 and the end of the flat tube 30, which is beneficial to improve the fluidity of the refrigerant, and further The heat exchange efficiency of the heat exchanger 100 is improved.

Further, fins 310 are disposed between adjacent flat tubes 30. It should be noted that the heat exchange fins 310 on the side of the first tube portion 31 of the flat tube 30 and the heat exchange fins on the side corresponding to the second tube portion 32 may be the same fin. In this way, the heat exchange area of the heat exchange fins 310 can be increased, which is advantageous for improving the heat exchange efficiency of the heat exchanger 100. Of course, the heat exchange fins 310 on the side of the first tube portion 31 of the flat tube 30 and the heat exchange fins on the side corresponding to the second tube portion 32 may also be mutually independent fins. The specific definition can be set according to the specific application environment.

Further, the heat exchanger 100 further includes a side plate 90 to fix the heat exchanger 100. It should be noted that the heat exchange fins 310 may also be disposed between the side plate 90 and the flat tube 30. Of course, the side plate 90 on the side of the first tube portion 31 of the flat tube 30 and the side plate 90 on the side of the second tube portion 32 may be a unitary side plate, which is advantageous for enhancing the stability of the heat exchanger. Of course, the side plate 90 on the side of the first tube portion 31 of the flat tube 30 and the side plate 90 on the side of the second tube portion 32 may also be mutually independent side plates.

It should be noted that the specific structure of the second tube portion 32 is similar to that of the first tube portion 31. For details, refer to the related description of the first tube portion 31. Correspondingly, the specific structure of the second header 20 and the first header 10 are similar. The specific description, particularly the mounting hole 24 and the partitioning groove 25, may be referred to the relevant in the first header 10. description.

In addition, in the heat exchangers shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the longitudinal direction of the end section 313 of the flat tube 30 and the length direction of the plane S2 and the end section 323 determined by the width direction are The plane S3 determined in the width direction is substantially parallel. Optionally, the plane S2 is parallel to the S3. It is advantageous for the installation of the flat tubes 30.

When the heat exchanger 100 is in operation, the refrigerant can enter the fourth chamber 22 of the second header through the distribution pipe 53, and enter the flat tube 30 of the third core 303 from the fourth chamber 22, and enter the first header 10 The second chamber 12. Thereafter, the refrigerant enters the flat tube 30 of the second core 302 from the second chamber 12, and then enters the third chamber 21 of the second header 20. Subsequently, the refrigerant enters the flat tube 30 of the first core portion 301, and then enters the first chamber 11 of the first header tube 10, and flows out through the first end 101 of the first chamber 11. At this point, the refrigerant completes a heat exchange process in the heat exchanger 100. Of course, when the heat exchanger 100 is in operation, the refrigerant can also exchange heat in the opposite flow direction, that is, from the first end 101 of the first chamber 11 and out of the heat exchanger 100 from the distribution pipe 53.

Referring to Figure 14, the present application provides another heat exchanger 200 that can be utilized in various types of heat exchange systems, such as air conditioners. The heat exchanger 200 mainly exchanges heat through the refrigerant inside the heat exchanger and the air flowing outside the heat exchanger to provide a relatively comfortable ambient temperature.

Referring to FIG. 14 and referring to FIG. 7 and FIGS. 14 to 21 as necessary, the heat exchanger 200 also includes a core for heat exchange formed by laminating a plurality of flat tubes 30, and is connected to the plurality of The first header 10 and the second header 20, the connecting body 81, the third header 60, and the fourth header 70 are disposed at the ends of the flat tubes 30 and arranged side by side. The third header 60 and the fourth header 70 are provided with mounting holes 64, 74 for inserting the end section 33. It should be noted that the installation holes 64, 74, and 14 and 24 in the heat exchanger 200 are similar to the mounting holes 14 and 24 in the heat exchanger 100 shown in FIGS. 1 to 13 above. I will not repeat them.

The flat tube includes a main body section, a final section, and a torsion section connecting the main body section and the end section. In an embodiment, the flat tube 30 has a torsion section near both ends. As shown in FIGS. 19A to 19D, the flat tube 30 includes a main body section 34, a first end section 36, and a second end section 38. a first torsion section 35 connecting the body section 34 with the first end section 36, and a second torsion section 37 connecting the body section 34 and the second end section 38. The main body section 34 and the first end section 36 and the second end section 38 are both straight sections and are not twisted and deformed.

The first torsional section 35 formed by twisting causes an angle α between the body section 34 and the first end section 36 to be formed (which can be combined with FIGS. 7 and 8). The inventor combined with his own accumulated production and processing technology experience, through mathematical modeling and model optimization calculation and analysis, the best recommended range of the torsion angle α is: 15 ° ≤ α < 40 °. Similarly, the second torsion section 37 formed by the twisting forms an angle between the body section 34 and the second end section 38, wherein the angle is substantially equal to the angle α. In some embodiments, the included angle is equal to the above-mentioned angle α, and it can be similarly found that the optimum recommended range of the included angle is the same as the recommended range of α (15° ≤ α < 40°). Regarding the twist of the flat tube 30, similar to the twist in the heat exchanger 100 shown in FIGS. 1 to 13 above, reference may be made to the above related description, and details are not described herein.

It should be noted that in the heat exchanger 200, the main body section 34 is the main heat exchange area. Thus, the length of the body section 34 is typically much greater than the first torsional section 35, the first end section 36, the second torsional section 37, and the second end section 38.

Similarly, the first header 10 is provided with a mounting hole 14 into which the first end 36 or the second end 38 of the flat tube 30 is inserted. The second header 20 is provided with a mounting hole 24 into which the first end section 36 or the second end section 38 of the flat tube 30 is inserted.

Further, the heat exchanger 200 further includes a partition 40, the first header 10 is provided with a partition groove 15, and one of the partitions 40 is inserted into the partition groove 15, and the first A header 10 is divided into a plurality of mutually isolated chambers. The second header 20 is provided with a partition groove 25, and one of the at least two partitions 40 is inserted into the partition groove 25, and the second header 20 is divided into a plurality of mutually isolated chambers. .

It should be noted that the partition plate 40 may be a non-porous inclined partition plate having the same structure as that of the heat exchanger 100 shown in FIG. 1 to FIG. 13 described above, or may be a non-tilted partition plate (may be combined with FIG. 21). Accordingly, the partition groove 15 and the partition groove 25 are opened corresponding to the partition 40 and matched with the partition 40. For example, when the partition 40 is inclined, the partition groove 15 or the partition groove 25 can be provided with reference to the partition grooves shown in FIGS. 1 to 13 described above. When the partition 40 is not inclined, the longitudinal direction L 2 of the corresponding partition groove is substantially perpendicular to the direction of the axis R1 of the header. It can be set according to the specific application environment, which is not limited in this application.

The first torsion section 35 and the second torsion section 37 are twisted on the same side. It should be noted that the ipsilateral torsion described in the present application focuses on the first end section 36 and the second end section 38. The relative position between the people. In a specific implementation, after the twisting, the plane S6 where the first end segment 36 is located is substantially parallel to the plane S4 where the second end segment 25 is located. Alternatively, the length L1 direction of the two mounting holes for inserting the flat tubes 30 on the headers at both ends of the flat tubes 30 is substantially parallel as viewed from the direction of the mounting holes of the header tubes 10. Specifically, the same side twisting can be described in detail with reference to FIGS. 19A to 19D. The flat tube 30 includes two surfaces S11 and S12 having a relatively large area, wherein the surface S11 includes a first section surface S111 at the first end section 36, a second section surface S112 at the first torsion section 35, and a main section The third segment surface S113 of the 34, the fourth segment surface S114 at the second torsion segment 37, and the five segment surface S115 at the second end segment 38. From top to bottom, it can be seen that the position of the second end section 38 after the torsion is actually obtained by twisting the second torsion section 37 in the counterclockwise direction; likewise, from the top down, it can be seen that the first end of the torsion after twisting The position of 36 is obtained by twisting the first torsion section 35 in the counterclockwise direction. After the twisting, the first segment surface S111 of the flat tube 30 is made to coincide with the orientation of the fifth segment surface S115. Further, the normals of the first segment surface S111 and the fifth segment surface S115 are substantially parallel. Ipsilateral torsion is also understood to mean that the first end section 36 comprises a first side 361 having a smaller area extending in the thickness direction of the first end section 36, the second end section 38 being included along the The second side edge 381 having a smaller area extending in the thickness direction of the second end portion 38 is located on the same side of the flat tube 30 as the first side edge 361 and the second side edge 381. The main body segment 34 includes a third side 341 having a smaller area, the third side 341 extending along the thickness T6 of the main body segment, and the third side 341 is oriented along the length direction L6 of the main body segment 34. End extending to form a first side 361 of the first end section 36 and a second side 381 of the second end section 38, the first side 361 and the second side 381 being located The longitudinal direction L6 of the main body segment 34 is on the same side as the plane defined by the width direction W6 (i.e., the plane on which the third segment surface S113 is located).

Furthermore, the first torsion section 35 of the flat tube 30 and the second torsion section 37 may also be twisted on the opposite side (in conjunction with FIG. 20). In the present application, it can be understood that the torsion angle is the same as the above-mentioned angle α, and the theoretical plane S7 can be regarded as being reversely twisted by the plane S4 by 180°, that is, after the opposite side torsion, the first section surface S111 It is exactly opposite to the orientation of the fifth segment surface S115. The first side 361 and the second side 381 are located on both sides of the plane defined by the longitudinal direction L6 and the width direction W6 of the main body section 34 (ie, the plane where the third section surface S113 is located).

The inventors have obtained a large number of experimental data and actual production operations to produce such a flat tube with the same side twist when the torsion angle α is 15° ≤ α < 40°, such as the opposite side twist, It can effectively reduce the occurrence of problems such as deformation and distortion of the flat tube body during twisting, thereby contributing to the improvement of the yield of the flat tube.

The core includes a fourth core portion 304 composed of a part of the plurality of flat tubes 30, and a fifth core portion 305 composed of another one of the plurality of flat tubes 30.

The partition 40 divides the first header 10 into a first chamber 11 and a second chamber 12 that are isolated from each other, and divides the second header 20 into third chambers 21 and 4 that are isolated from each other. Cavity 22. Correspondingly, a portion of the flat tubes 30 of the fourth core portion 304 communicates with the inner chambers of the first chamber 11 and the third header tube 60. Another portion of the flat tube 30 of the fourth core portion 304 communicates with the inner chamber of the second chamber 12 and the third header tube 60. A portion of the flat tubes 30 of the fifth core portion 305 communicates with the inner chambers of the third chamber 21 and the fourth header tube 70. Another portion of the flat tubes 30 of the fifth core portion 301 communicates with the inner chambers of the fourth chamber 22 and the fourth header tube 70. And the connecting body 81 communicates with the second cavity 12 and the fourth cavity 22.

Further, the connecting body 81 is disposed adjacent to the second cavity 12 and the fourth cavity 22, and a plurality of passages for connecting the second cavity 12 and the fourth cavity 22 are disposed along the length direction L4 of the connecting body 81. Hole 815. Optionally, the plurality of through holes 815 may be evenly distributed. Of course, the plurality of through holes 815 may also be unevenly distributed. It can be set according to the specific application environment, which is not limited in this application. Correspondingly. The first header 10 is correspondingly provided with a connecting hole 18 that cooperates with the through hole 815. The second collecting pipe 20 is correspondingly provided with a connecting hole 28 that cooperates with the through hole 815. The inventor combined with his own accumulated experience in production and processing technology, the optimum range of the aperture D of the through hole 815 and the connecting holes 18, 28 is: 2 mm ≤ D ≤ 4 mm. Preferably, the aperture D is 2.5 mm (combined with Figure 16D).

Further, the connecting body 81 is disposed between the first header 10 and the second header 20, and the first and second headers 10 and 20 are both cylindrical. The surface 813 of the connecting body 81 that is in contact with the first and second headers 10, 20 is an arc-shaped concave surface that cooperates with the outer wall surfaces of the first and second headers 10, 20 (can be combined with FIG. 17A to FIG. 17C). The first and second headers 10, 20 and the connecting body 81 can be fixed by welding (for example, brazing). The connecting body 81 can support the first header 10 and the second header 20 on both sides to improve the stability of the product. In addition, the use of CO2 refrigerant in the field of automotive air conditioning requires that the relevant heat exchanger has a higher compressive strength, and the first and second headers use a cylindrical tube to increase the strength of the header, in order to achieve between the two headers. In connection, the solution connects the first and second headers by using a connector structure, and the connection stability is higher than that of the first and second headers.

The connector 81 includes opposing first and second surfaces 811, 812. Optionally, the width W4 of the first surface 811 is greater than the width W5 of the second surface 812.

Further, the heat exchanger further includes a connecting body 82 between the third header 60 and the fourth header 70.

In an alternative embodiment, the third and fourth headers 60, 70 are all cylindrical, and the surface 813 of the connecting body 82 and the third and fourth headers 60, 70 are attached. They are all curved concave surfaces. The third and fourth headers 10, 20 may be fixed to the connector 82 by welding (for example, brazing) (which may be combined with Figs. 18A to 18C). The connecting body 82 can support the third header 60 and the fourth header 700 on both sides to further improve the stability of the product.

Further, the first header 10 is provided with an external interface 17 communicating with the first cavity 11. An external portion 16 is correspondingly disposed at the outer interface 17 . The second header 20 is provided with an outer interface 27 that communicates with the third chamber 21. An external portion 26 is correspondingly disposed at the outer interface 27 . Wherein, the outer interface 17 and the outer interface 27 are staggered to facilitate the installation of the heat exchanger 200. Of course, the outer interfaces 17, 27 can also be aligned.

Further, fins 310 are disposed between adjacent flat tubes 30. The fins 310 disposed on the side of the first header 10 and the third header 60 may correspond to the fins 310 corresponding to the sides of the second header and the fourth header 70. A fin to increase the heat exchange area and improve the heat transfer effect. It can also be two independent fins.

Further, the heat exchanger 200 further includes a side plate 90 to fix the heat exchanger 200. It should be noted that the heat exchange fins 310 may also be disposed between the side plate 90 and the flat tube 30. The side panel 90 at the first end 101 can be a unitary side panel to enhance the stability of the heat exchanger. The side panel 90 at the first end 101 can also be two mutually independent side panels. Of course, the side plate 90 at the second end 103 can also be an integral side plate or two mutually independent side plates.

When the heat exchanger 200 is in operation, the refrigerant can enter the first chamber 11 from the external portion 16 of the first header 10 via the external interface 17. Further, the first chamber 11 further enters a part of the flat tubes 30 of the first core portion 304, and flows into the third header tube 60 in the flat tubes 30, which is the first flow of the refrigerant. Thereafter, the third header 60 is introduced and flows from the first end 101 of the third header 60 to the second end 103. Further, the refrigerant enters the partial flat tube 30 of the second core portion 305 from the third header 60, and flows into the first header 10 in the flat tube 30, which is the second flow of the refrigerant. Further, the second chamber 12 of the first header 10 is entered. The refrigerant enters the fourth chamber 22 of the second header 20 via the through hole 815 of the connecting body 81. Thereafter, the refrigerant flows to the fourth header 70 through the other portion of the flat tube 30 of the second core, which is the third flow. Further, it enters the fourth header 70 and flows from the second end 103 of the fourth header 70 to the first end. Then, the refrigerant flows through the other portion of the flat tube 30 of the first core portion 304 to the third chamber 21 of the second header 20, which is the fourth flow. Finally, the refrigerant exits the heat exchanger from the outer interface 27 of the second header 20 via the external portion 26. At this point, the refrigerant completes a heat exchange process in the heat exchanger 200. Wherein, when the refrigerant flows in the heat exchanger 200, the first process, the second process, the third process, and the fourth process are respectively the highest temperature, the second highest temperature, the second low temperature, and the lowest temperature. Part of the air passes through the lowest temperature and the highest temperature in turn, and the other part passes through the side low temperature and the second high temperature. Compared with the four processes of the bending structure, the temperature gradient in each process is more reasonable, and the temperature difference between the air and each process can be fully utilized. The air temperature after heat exchange through the heat exchanger is more uniform. It should be noted that the heat exchanger 200 includes but is not limited to 2 processes or 4 processes, and the heat exchanger 200 may also be other processes, such as 6 processes, 8 processes, 10 processes, and the like.

Of course, when the heat exchanger 200 is in operation, the flow direction of the refrigerant may also be opposite to the flow direction, that is, the refrigerant flows in from the outer port 27 and flows out from the outer port 17. This application does not limit this, and can be set according to specific applications.

In the above embodiments, the collector tubes are arranged side by side to form at least two layers of heat exchange structures, and multiple heat exchanges are performed on the air flowing out of the flat tubes to ensure sufficient heat exchange between the air. Moreover, the length of the refrigerant passage inside the heat exchanger is increased by the arrangement of the partition plate, which is beneficial to improving the heat exchange efficiency of the heat exchanger. In addition, the two ends of the flat tube have a torsion section, and the flat tube is twisted and twisted obliquely to the collecting tube, so that the diameter (diameter) of the collecting tube does not need to be larger than the width of the flat tube, which is advantageous for the diameter of the collecting tube. It is advantageous to increase the pressure resistance of the header when the same material of the same tube has the same wall thickness.

In addition, the present application also provides a heat exchange system including the heat exchanger 100 or the heat exchanger 200 described above.

The present application also provides an electric vehicle or an electric vehicle including the above heat exchange system.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the application. Although the present application has been disclosed above in the preferred embodiments, it is not intended to limit the application, any technology that is familiar with the subject. In the scope of the technical solutions of the present application, the equivalents of the technical solutions disclosed above may be modified or modified to equivalent changes, but the contents are not deviated from the technical solutions of the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the technical solutions of the present application.

Claims (18)

A heat exchanger, characterized in that the heat exchanger comprises a header and a flat tube; The flat tube includes a generally flat body section and a first end section and a second end section interposed to the header, the first end section and the second end section being ipsilateral with respect to the body section The angle between the plane defined by the longitudinal direction and the width direction of the main body segment and the plane defined by the longitudinal direction of the first end section and the second end and the width direction is α, α ≠ 90°; The collecting pipe is provided with a mounting hole, at least a part of the first end section and at least part of the second end section are inserted into the mounting hole, and a length direction of the main body section is opposite to the collecting pipe The axis is substantially vertical, and the angle between the longitudinal direction of the mounting hole and the axis of the header is β, β ≠ 90°. A heat exchanger according to claim 1, wherein an angle between a plane defined by a longitudinal direction and a width direction of said main body section and a plane defined by a length direction of said end section and a width direction is α, 15° ≤ α < 40°; the angle between the longitudinal direction of the mounting hole and the axis of the collecting pipe is β, 50° < β ≤ 75°. The heat exchanger according to claim 2, wherein the longitudinal direction of the both ends of the flat tubes and the two planes defined by the width direction are substantially parallel. A heat exchanger according to claim 1 or 2 or 3, wherein the longitudinal direction of the body section and the plane defined by the width direction are substantially perpendicular to the axis of the header. A heat exchanger according to claim 1 or 2 or 3, wherein said heat exchanger further comprises a partition, said header being provided with a partition groove, said partition being inserted into said partition A plate slot divides the header into no less than two mutually isolated chambers. A heat exchanger according to claim 5, wherein said header comprises a first header and a second header, said first header being provided with a partition groove, said partition Inserting the plate into the partition groove, dividing the first header into two first chambers and a second chamber; a plurality of the flat tube stacks constitute a core for heat exchange, the core portion including a first core portion composed of a part of the plurality of flat tubes, and being composed of another one of the plurality of flat tubes Second core; One end of the flat tube of the first core is inserted into the first header, such that a heat exchange passage of the flat tube communicates with the first chamber; and one end of the flat tube of the second core is inserted The first header allows the heat exchange passage of the flat tube to communicate with the second chamber. The heat exchanger according to claim 6, wherein said core further comprises a third core composed of a third portion of said plurality of said flat tubes, said partitioning said second set The flow tube is separated into a third chamber and a fourth chamber that are isolated from each other; Wherein the other end of the flat tube in the first core portion is inserted into the second header so that the heat exchange passage of the flat tube communicates with the third chamber; the flat tube of the second core The other end is inserted into the second header so that the heat exchange passage of the flat tube communicates with the third chamber; the heat exchange passage of the flat tube of the third core communicates with the second chamber Said fourth cavity. The heat exchanger according to claim 5, wherein the longitudinal direction (L2) of the partition groove is not perpendicular to the axis of the first header or the axis of the second header. The heat exchanger according to claim 6, wherein a length direction of the mounting hole in the first header is substantially parallel to the partition groove; or a hole is installed in the second header The longitudinal direction is substantially parallel to the longitudinal direction of the partition groove. The heat exchanger according to claim 5, wherein said partition comprises a first and second faces of opposite large areas, and a first side and a second adjacent to said first and second faces a side surface; wherein the first side and the second side are parallel, a perpendicular of the first side of the partition is not perpendicular to a perpendicular of the first side and the second side, and the second side of the partition The perpendicular line is not perpendicular to the perpendicular line of the first side and the second side. The heat exchanger according to claim 6, wherein said heat exchanger further comprises an inlet member and an outlet member; The inlet includes an associated tube portion and a dispensing portion extending from a first end of the first header to a second chamber, the dispensing portion being disposed adjacent to the second chamber, internally disposed a flow channel disposed along a longitudinal direction of the first header and a plurality of distribution holes disposed along a length of the flow channel, the distribution hole communicating the flow channel and the second cavity, and the pipe portion is connected to the flow channel through; The output member is disposed at the first end of the first header and communicates with the first chamber of the first header. The heat exchanger according to claim 6, wherein said heat exchanger further comprises a distribution pipe, said first header and said second header having opposite first and second sides along the length direction And the third chamber is closer to the first end of the second header than the fourth chamber, the distribution tube being communicated from the first end of the second header through the third chamber Fourth cavity The partition inserted into the partition groove of the second header is an open partition. The heat exchanger according to claim 6, wherein said heat exchanger further comprises a connecting body, and third and fourth headers arranged side by side, said third header and said The axis of the fourth header is substantially parallel, and the third and fourth headers are spaced apart from the first and second headers by a predetermined distance; the connectors are disposed at the first and second sides arranged side by side. Between the gap formed by the header or the third and fourth headers, the two headers arranged side by side are connected by the connecting body. The heat exchanger according to claim 6 or 13, wherein the third header and the fourth header are provided with mounting holes for inserting the end sections; The core portion includes a fourth core portion composed of a part of the plurality of flat tubes, and a fifth core portion composed of another one of the plurality of flat tubes; The partition divides the first header into first and second chambers that are isolated from each other, and divides the second header into third and fourth chambers that are isolated from each other; wherein a portion of the flat tube of the fourth core communicates with the inner cavity of the first chamber and the third header; another portion of the flat tube of the fourth core communicates with the second chamber and the third header a lumen; a portion of the flat tube of the fifth core communicates with the lumen of the third chamber and the fourth header; another portion of the fifth tube of the fifth core communicates with the fourth chamber and An inner cavity of the four headers; and the connector communicates with the second and fourth chambers. The heat exchanger according to any one of claims 6 to 7 or 13, wherein the connecting body is disposed adjacent to the second chamber and the fourth chamber, and is disposed along the length direction of the connecting body to A plurality of through holes connecting the second cavity and the fourth cavity. The heat exchanger according to claim 6 or 15, wherein the connecting body is disposed between the first header and the second header, the first and second headers Each has a cylindrical shape, and the surface of the connecting body that is in contact with the first and second headers is a curved concave surface. The heat exchanger according to claim 13, wherein said heat exchanger further comprises a connecting body between said third header and said fourth header. The heat exchanger according to claim 13, wherein said third and fourth headers are each cylindrical, and said surface of said connecting body and said third and fourth headers are bonded It is curved and concave.

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