CN111765797A - Flat pipe and heat exchanger with same - Google Patents
Flat pipe and heat exchanger with same Download PDFInfo
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- CN111765797A CN111765797A CN201910262715.7A CN201910262715A CN111765797A CN 111765797 A CN111765797 A CN 111765797A CN 201910262715 A CN201910262715 A CN 201910262715A CN 111765797 A CN111765797 A CN 111765797A
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- 238000005452 bending Methods 0.000 claims description 24
- 238000007373 indentation Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a flat pipe and a heat exchanger with the same, wherein the flat pipe is provided with a first end and a second end which are opposite to each other along the length direction of the flat pipe, the flat pipe is provided with a first longitudinal side and a second longitudinal side which are opposite to each other along the width direction of the flat pipe, the first longitudinal side of the first end is provided with a first concave part, the second longitudinal side of the first end is provided with a second concave part, the first concave part is provided with a first length which extends from the end surface of the first end along the length direction of the flat pipe and is provided with a first depth which extends from the first longitudinal side along the width direction of the flat pipe, the second concave part is provided with a second length which extends from the end surface of the second end along the length direction of the flat pipe and is provided with a second depth which extends from the second longitudinal side along the width direction of the flat pipe, and the first length and. The flat pipe provided by the embodiment of the invention is used on a parallel flow heat exchanger, and has the advantages of reducing stress concentration, improving the reliability of the heat exchanger and the like.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a flat pipe and a heat exchanger with the flat pipe.
Background
Two longitudinal sides of flat pipes of a parallel flow heat exchanger in the related art are mutually symmetrical, and in order to improve heat exchange efficiency and reliability, when collecting pipe installation and connection are carried out, the flat pipes are closer to the outer wall of one side of the collecting pipe in the radial direction. Therefore, when the heat exchanger is installed, the positioning of the connection position of the flat pipe and the collecting pipe is not facilitated, the stress concentration of the flat pipe is caused, and the reliability of the heat exchanger is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the flat pipe which is used for the parallel flow heat exchanger and has the advantages of reducing stress concentration, improving the reliability of the heat exchanger and the like.
The invention also provides a heat exchanger with the flat tube.
In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a flat tube having a first end and a second end opposite to each other in a length direction of the flat tube, and the flat tube has a first longitudinal side and a second longitudinal side which are opposite to each other in the width direction of the flat tube, a first longitudinal side of the first end is provided with a first recess, a second longitudinal side of the first end is provided with a second recess, the first recess has a first length extending from an end face of the first end in a length direction of the flat tube and a first depth extending from the first longitudinal side in a width direction of the flat tube, the second recess has a second length extending from an end face of the second end in a length direction of the flat tube and has a second depth extending from the second longitudinal side in a width direction of the flat tube, wherein the first length and the second length are not equal to each other.
The flat pipe provided by the embodiment of the invention is used on a parallel flow heat exchanger, and has the advantages of reducing stress concentration, improving the reliability of the heat exchanger and the like.
In addition, the flat pipe according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the first longitudinal side of the second end is provided with a third recess having a third length extending from the end face of the second end in the length direction of the flat tube and having a third depth extending from the first longitudinal side in the width direction of the flat tube.
According to an embodiment of the invention, the first length is equal to the third length, the second longitudinal side of the second end is provided with a fourth recess having a fourth length extending from the end face of the second end in the length direction of the flat tube and having a fourth depth extending from the second longitudinal side in the width direction of the flat tube, the second length being equal to the fourth length.
According to an embodiment of the invention, the first depth, the second depth, the third depth and the fourth depth are equal.
According to an embodiment of the invention, the second length is greater than the first length and the fourth length is greater than the third length.
According to one embodiment of the present invention, a fifth recess is provided on the first longitudinal side of the first end of the flat tube, a first protrusion is included between the fifth recess and the first recess in the longitudinal direction of the flat tube, and the fifth recess has a fifth length extending in the longitudinal direction of the flat tube and has a fifth depth extending from the first longitudinal side in the width direction of the flat tube.
According to an embodiment of the present invention, a sum of the first length, the fifth length, and a length of the first protrusion in a length direction of the flat tube is equal to the second length.
According to one embodiment of the invention, the first longitudinal side of the second end of the flat tube is provided with a sixth recess, a second protrusion is included between the sixth recess and the third recess in the longitudinal direction of the flat tube, and the sixth recess has a sixth length extending in the longitudinal direction of the flat tube and has a sixth depth extending from the first longitudinal side in the width direction of the flat tube.
According to an embodiment of the present invention, a sum of the first length, the fifth length, and a length of the first protrusion in the length direction of the flat tube is equal to the second length, and a sum of the sixth length, the third length, and a length of the second protrusion in the length direction of the flat tube is equal to the fourth length.
According to an embodiment of the invention, the ratio between the second length and the first length is 1-2.5.
An embodiment according to the second aspect of the invention proposes a flat tube having a first end and a second end opposite to each other in a length direction of the flat tube, and the flat tube has a first longitudinal side and a second longitudinal side which are opposite to each other in the width direction of the flat tube, a first end of the first longitudinal side is provided with a first recess, a second end of the first longitudinal side is provided with a third recess, the first recess has a first length extending from an end face of the first end in a length direction of the flat tube and a first depth extending from the first longitudinal side in a width direction of the flat tube, the third recess has a third length extending from an end face of the second end in a length direction of the flat tube and a third depth extending from the first longitudinal side in a width direction of the flat tube, and the first length and the third length are equal to each other.
The flat pipe provided by the embodiment of the invention is used for a parallel flow heat exchanger, and has the advantages of reducing stress concentration, improving reliability and the like.
An embodiment according to a third aspect of the invention proposes a heat exchanger comprising: the first collecting pipe comprises openings which are arranged at intervals along the length direction of the first collecting pipe; the second collecting pipe comprises openings which are arranged at intervals along the length direction of the second collecting pipe, and the first collecting pipe and the second collecting pipe are arranged in parallel; the flat pipe is the flat pipe according to the first aspect or the second aspect of the present invention, a first end of the flat pipe passes through an opening of the first header pipe and is connected to the first header pipe, a second end of the flat pipe passes through an opening of the second header pipe and is connected to the second header pipe, wherein, in a cross section orthogonal to the length direction of the first header pipe and the second header pipe, in the width direction of the flat pipe, a maximum distance between a first longitudinal side of the flat pipe and an outer wall surface of the first header pipe adjacent to the first longitudinal side is smaller than a maximum distance between a second longitudinal side of the flat pipe and an outer wall surface of the first header pipe adjacent to the second longitudinal side and/or a maximum distance between the first longitudinal side of the flat pipe and an outer wall surface of the second header pipe adjacent to the first longitudinal side is smaller than a maximum distance between the second longitudinal side of the flat pipe and the outer wall surface of the second header pipe adjacent to the second longitudinal side The maximum distance between the outer wall surfaces of the adjacent sides.
According to the heat exchanger provided by the embodiment of the invention, by using the flat pipe provided by the embodiment of the first aspect or the second aspect of the invention, the advantages of reducing stress concentration of the heat exchanger, improving reliability and the like can be achieved.
According to an embodiment of the present invention, the first header and the second header are circular tubes, elliptical tubes or D-shaped tubes.
According to an embodiment of the invention, a first longitudinal side of the first end is provided with a first recess having a first length extending from an end face of the first end in a length direction of the flat tube and having a first depth extending from the first longitudinal side in a width direction of the flat tube, a second longitudinal side of the first end is provided with a second recess having a second length extending from an end face of the second end in a length direction of the flat tube and having a second depth extending from the second longitudinal side in a width direction of the flat tube, the first longitudinal side of the second end is provided with a third recess having a third length extending from an end face of the second end in a length direction of the flat tube and having a third depth extending from the first longitudinal side in a width direction of the flat tube, the second longitudinal side of the second end is provided with a fourth recess, the fourth recess has a fourth length extending from the end face of the second end in the length direction of the flat tube and a fourth depth extending from the second longitudinal side in the width direction of the flat tube, the second length is greater than the first length, the fourth length is greater than the third length, the first depth and the third depth are equal, and the second depth and the fourth depth are equal.
According to an embodiment of the invention, the first length is equal to or greater than a length of an inner portion of the first header at the first longitudinal side, the second length is equal to or greater than a length of the second longitudinal side within the first header, the third length is equal to or greater than a length of the first longitudinal side within the second header, and the fourth length is equal to or greater than a length of the second longitudinal side within the second header.
According to an embodiment of the present invention, the first collecting pipe includes at least a first bending section, the first end of the flat pipe is connected to the first bending section, the second collecting pipe includes at least a second bending section, and the second end of the flat pipe is connected to the second bending section, wherein a second longitudinal side of the flat pipe is closer to an outer side of the first bending section than the first longitudinal side and/or a second longitudinal side of the flat pipe is closer to an outer side of the second bending section than the first longitudinal side.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a heat exchanger according to one embodiment of the present invention.
Fig. 2 is a cross-sectional view of a heat exchanger according to another embodiment of the present invention.
Fig. 3 is a cross-sectional view of a heat exchanger according to another embodiment of the present invention.
Fig. 4 is a schematic structural view of a heat exchanger according to an embodiment of the present invention.
Fig. 5 is a partial structural schematic view of a heat exchanger according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a heat exchanger according to an embodiment of the present invention.
Reference numerals: the heat exchanger comprises a heat exchanger 1, flat tubes 100, a first end 101, a second end 102, a first longitudinal side 103, a second longitudinal side 104, a width center line 105, a first recess 110, a second recess 120, a third recess 130, a fourth recess 140, a fifth recess 150, a sixth recess 160, a first protrusion 170, a second protrusion 180, a first header 10, a first radial center line 11, a first bending section 12, a first pressing side 13, a first stretching side 14, a second header 20, a second radial center line 21, a second bending section 22, and fins 30.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, flat pipe 100 according to an embodiment of the present invention has first and second ends 101 and 102 opposite to each other in a length direction of flat pipe 100, flat pipe 100 has a rectangular, square, or oval cross-section, and flat pipe 100 has first and second longitudinal sides 103 and 104 opposite to each other in a width direction of flat pipe 100, first longitudinal side 103 of first end 101 is provided with first recess 110, second longitudinal side 104 of first end 101 is provided with second recess 120, first recess 110 has a first length extending from an end surface of first end 101 in the length direction of flat pipe 100 and has a first depth extending from first longitudinal side 103 in the width direction of flat pipe, second recess 120 has a second length extending from an end surface of second end 102 in the length direction of flat pipe 100 and has a second depth extending from second longitudinal side 104 in the width direction of flat pipe 100, wherein the first length and the second length are not equal to each other.
According to the flat tube 100 of the embodiment of the present invention, the first concave portion 110 and the second concave portion 120 are provided on the flat tube 100, so that the first concave portion 110 and the second concave portion 120 can be used to position the fitting of the flat tube 100 and the header. Specifically, the first concave portion 110 and the second concave portion 120 may be used to stop against the wall of the collecting pipe, so as to confirm whether the flat pipe 100 is installed in place during installation, and the positioning effect between the flat pipe 100 and the collecting pipe may be improved after installation, thereby improving the stability of the two.
On the other hand, set up first concave part 110 and second concave part 120, can reduce flat pipe 100 and insert the width of collecting main portion to can be convenient for control the pipe diameter of collecting main, thereby reduce the refrigerant and fill and annotate.
Moreover, the lengths of the first concave portion 110 and the second concave portion 120 are not equal, so that the flat tube 100 can be conveniently and eccentrically mounted on the collecting main, and a center line of the flat tube 100 passing through the center of the width direction is staggered with a center line of the collecting main passing through the center of the radial section (as shown in fig. 1 to fig. 3), so that the center of the flat tube 100 in the width direction is offset from the radial center of the collecting main by a predetermined distance. For example, the first recess 110 and the second recess 120 may each stop against a wall of the header. Compared with the mode that the flat pipe and the collecting pipe center are installed in a coincident mode in the related art, the stress concentration positions of the flat pipe and the collecting pipe can be prevented from being coincident, the stress concentration at the joint of the flat pipe 100 and the collecting pipe after installation is avoided, and the service life of the heat exchanger is prolonged.
In addition, the center line of the flat pipe 100 passing through the center of the width direction is staggered with the center line of the collecting pipe passing through the center of the radial section, so that the flat pipe 100 is eccentrically installed on the collecting pipe, the bending radius of the flat pipe 100 can be reduced when the collecting pipe is bent, the influence of stretching or compression on the flat pipe 100 when the collecting pipe is bent is reduced, the possibility of tearing of a welding seam between the flat pipe 100 and a throttling pipe when the collecting pipe is bent is reduced, and the reliability of the heat exchanger is improved.
Further, by making the lengths of the first concave portion 110 and the second concave portion 120 unequal, the degree of fit of the flat pipe 100 eccentrically mounted on the collecting pipe can be improved, so that the flat pipe 100 is more suitable for eccentric mounting, and the stability and reliability of the flat pipe 100 after mounting are improved.
Therefore, the flat tube 100 according to the embodiment of the present invention has the advantages of reducing stress concentration, improving the tearing condition of the weld between the flat tube at the bending position and the collector, improving reliability, and reducing stress concentration.
In some embodiments of the present invention, as shown in fig. 1 and 2, flat tube 100 according to embodiments of the present invention has first end 101 and second end 102 opposite each other along a length of flat tube 100, and flat tube 100 has a first longitudinal side 103 and a second longitudinal side 104 opposite to each other in a width direction of flat tube 100, first longitudinal side 103 of first end 101 is provided with a first recess 110, second longitudinal side 104 of first end 101 is provided with a second recess 120, first recess 110 has a first length extending from an end surface of first end 101 in the length direction of flat tube 100 and has a first depth extending from first longitudinal side 103 in the width direction of the flat tube, second recess 120 has a second length extending from an end surface of second end 102 in the length direction of flat tube 100 and has a second depth extending from second longitudinal side 104 in the width direction of flat tube 100, wherein the first length and the second length are not equal to each other.
Advantageously, as shown in fig. 1 and 2, the first longitudinal side 103 of the second end 102 is provided with a third recess 130, the third recess 130 having a third length extending from the end face of the second end 102 in the longitudinal direction of the flat tube 100 and having a third depth extending from said first longitudinal side in the width direction of the flat tube 100. Therefore, the second end 102 of the flat pipe 100 can be positioned by the third concave portion 130, the second end 102 of the flat pipe 100 is connected with the collecting pipe in an eccentric mode, and therefore stability and reliability of the flat pipe 100 are improved.
Specifically, as shown in fig. 1 and 2, the first length is equal to the third length. This allows flat tube 100 to be of a more regular size and to be easily machined and stored.
Advantageously, as shown in fig. 1 and 2, the second longitudinal side 104 of the second end 102 is provided with a fourth recess 140, the fourth recess 140 having a fourth length extending from the end face of the second end 102 in the longitudinal direction of the flat tube 100 and a fourth depth extending from the second longitudinal side 104 in the width direction of the flat tube 100. Therefore, the second end 102 of the flat tube 100 can be positioned by the third concave portion 130 and the fourth concave portion 140, and the second end 102 of the flat tube 100 is further conveniently connected with the collecting pipe in an eccentric mode, so that the stability and the reliability of the flat tube 100 are improved.
More specifically, as shown in fig. 1 and 2, the second length is equal to the fourth length. This may allow flat tube 100 to be more regular in size, easier to machine and store, and may allow fourth recess 140 to be longer than third recess 130, thereby facilitating the positioning of second end 102.
Fig. 2 shows a flat tube 100 according to an exemplary embodiment of the present invention. As shown in fig. 2, the second length is greater than the first length, a fifth recess 150 is provided on a first longitudinal side 103 of the first end 101 of the flat tube 100, a first protrusion 170 is included between the fifth recess 150 and the first recess 110 in the length direction of the flat tube 100, and the fifth recess 150 has a fifth length extending in the length direction of the flat tube 100 and has a fifth depth extending from the first longitudinal side 103 in the width direction of the flat tube 100. Can utilize first arch 170 and second concave part 120 to fix a position the first end 101 of flat pipe 100 jointly like this, owing to be equipped with fifth concave part 150, can be convenient for process two vertical sides of flat pipe 100 simultaneously moreover to reduce flat pipe 100's the processing degree of difficulty, improve flat pipe 100's production efficiency.
Specifically, as shown in fig. 2, the sum of the first length, the fifth length, and the length of the first protrusion 170 in the length direction of the flat tube is equal to the second length. Therefore, the shape of the flat tube 100 is more regular, and the flat tube 100 is further convenient to process.
Advantageously, as shown in fig. 2, the second length is greater than the first length, fifth indentation 150 is provided on first longitudinal side 103 of first end 101 of flat tube 100, first protrusion 170 is included between fifth indentation 150 and first indentation 110 in the length direction of flat tube 100, fifth indentation 150 has a fifth length extending in the length direction of flat tube 100 and has a fifth depth extending from first longitudinal side 103 in the width direction of flat tube 100, the fourth length is greater than the third length, first longitudinal side of second end 102 of flat tube 100 is provided with sixth indentation 160, second protrusion 180 is included between sixth indentation 160 and third indentation 130 in the length direction of flat tube 100, and sixth indentation 160 has a sixth length extending in the length direction of flat tube 100 and has a sixth depth extending from the first longitudinal side in the width direction of flat tube 100. Can utilize first arch 170 and second concave part 120 to fix a position the first end 101 of flat pipe 100 jointly like this, utilize second arch 180 and fourth concave part 140 to fix a position the second end 102 of flat pipe 100 jointly, owing to be equipped with fifth concave part 150 and sixth concave part 160, can be convenient for process the both sides vertical side of flat pipe 100 simultaneously in addition to reduce flat pipe 100's the processing degree of difficulty, improve flat pipe 100's production efficiency.
More advantageously, as shown in fig. 2, the sum of the first length, the fifth length, and the length of first protrusion 170 in the length direction of flat tube 100 is equal to the second length, and the sum of the sixth length, the third length, and the length of second protrusion 180 in the length direction of flat tube 100 is equal to the fourth length. Therefore, the shape of the flat tube 100 is more regular, and the flat tube 100 is further convenient to process.
More specifically, as shown in fig. 1 and 2, the ratio of the second length to the first length is 1-2.5. Therefore, the influence on the positioning effect of the flat tube 100 caused by the overlarge length difference between the two can be avoided.
It will be appreciated by those skilled in the art that the ratio of the fourth length to the third length is also 1-2.5.
As shown in fig. 3, flat tube 100 according to an embodiment of the present invention has first and second ends 101 and 102 opposite to each other in a length direction of flat tube 100, and flat tube 100 has first and second longitudinal sides 103 and 104 opposite to each other in a width direction of flat tube 100, first end 101 of first longitudinal side 103 is provided with first concave portion 110, second end 102 of first longitudinal side 103 is provided with third concave portion 130, first concave portion 110 has a first length extending from an end surface of first end 101 in the length direction of flat tube 100 and has a first depth extending from first longitudinal side 103 in the width direction of flat tube 100, and third concave portion 130 has a third length extending from an end surface of second end 102 in the length direction of flat tube 100 and has a third depth extending from first longitudinal side 103 in the width direction of flat tube 100.
According to the flat tube 100 of the embodiment of the present invention, the first concave portion 110 and the third concave portion 130 are disposed on the flat tube 100, so that the first concave portion 110 and the third concave portion 130 can be used to position the two ends of the flat tube 100 and the header in a fitting manner. Specifically, the first concave portion 110 and the third concave portion 130 may be used to stop against the wall of the collecting pipe, so as to confirm whether the flat pipe 100 is installed in place during installation, and the positioning effect between the flat pipe 100 and the collecting pipe may be improved after installation, thereby improving the stability of the two.
On the other hand, set up first concave part 110 and third concave part 130, can reduce flat pipe 100 and insert the width of collecting main portion to can be convenient for control the pipe diameter of collecting main, thereby reduce the refrigerant and fill and annotate.
Moreover, by providing the first concave portion 110 and the third concave portion 130 only on a single longitudinal side of the flat tube 100, it is possible to facilitate the flat tube 100 to be eccentrically mounted on the header, and to make a center line of the flat tube 100 passing through the center in the width direction offset from a center line of the header passing through the center of the radial cross section (as shown in fig. 1 to 3), so that the center of the flat tube 100 in the width direction is offset from the radial center of the header by a predetermined distance. For example, the first recess 110 and the second longitudinal side 104 of the flat tube 100 can each rest against the wall of the header. Compared with the mode that the flat pipe and the collecting pipe center are installed in a coincident mode in the related art, the stress concentration positions of the flat pipe and the collecting pipe can be prevented from being coincident, the stress concentration at the joint of the flat pipe 100 and the collecting pipe after installation is avoided, and the service life of the heat exchanger is prolonged.
In addition, the center line of the flat pipe 100 passing through the center of the width direction is staggered with the center line of the collecting pipe passing through the center of the radial section, so that the flat pipe 100 is eccentrically installed on the collecting pipe, the bending radius of the flat pipe 100 can be reduced when the collecting pipe is bent, the influence of stretching or compression on the flat pipe 100 when the collecting pipe is bent is reduced, the possibility of tearing of a welding seam between the flat pipe 100 and the collecting pipe when the collecting pipe is bent is reduced, and the reliability of the heat exchanger is improved.
Further, through only setting up first concave part 110 and third concave part 130 on the single longitudinal side of flat pipe 100, can improve the degree of adaptability of flat pipe 100 eccentric mounting on the pressure manifold, make flat pipe 100 be suitable for eccentric mounting more, improve stability and reliability after flat pipe 100 installs.
Therefore, the flat tube 100 according to the embodiment of the present invention has the advantages of reducing stress concentration, improving reliability, and the like, and can improve the situation of the tearing of the weld between the flat tube and the collector at the bending position when the heat exchanger is further bent.
In some specific embodiments of the present invention, as shown in fig. 3, flat tube 100 according to an embodiment of the present invention has first end 101 and second end 102 opposite to each other in a length direction of flat tube 100, and flat tube 100 has first longitudinal side 103 and second longitudinal side 104 opposite to each other in a width direction of flat tube 100, first end 101 of first longitudinal side 103 is provided with first recess 110, second end 102 of first longitudinal side 103 is provided with third recess 130, first recess 110 has a first length extending from an end surface of first end 101 in the length direction of flat tube 100 and has a first depth extending from first longitudinal side 103 in the width direction of flat tube 100, and third recess 130 has a third length extending from an end surface of second end 102 in the length direction of flat tube 100 and has a third depth extending from first longitudinal side 103 in the width direction of flat tube 100.
Specifically, as shown in fig. 3, the first length and the third length are equal to each other. This allows flat tube 100 to be of a more regular size and to be easily machined and stored.
Specifically, the first depth, the second depth, the third depth, and the fourth depth may be equal. Therefore, the shape of the flat pipe 100 is more regular, and the flat pipe 100 is convenient to process.
It will be understood by those skilled in the art that the first depth, the second depth, the third depth and the fourth depth may not be equal.
The heat exchanger 1 according to an embodiment of the present invention is described below. The heat exchanger 1 according to the embodiment of the present invention includes a first collecting pipe 10, a second collecting pipe 20, and a flat pipe, where the first collecting pipe 10 includes openings arranged at intervals along a length direction of the first collecting pipe 10. The second collecting pipe 20 includes openings spaced along the length direction of the second collecting pipe 20, and the first collecting pipe 10 and the second collecting pipe 20 are arranged in parallel. The flat pipe is the flat pipe 100 according to the above embodiment of the present invention, the second end 102 of the flat pipe 100 passes through the opening of the first collecting pipe 10 to be connected to the first collecting pipe 10, the second end 102 of the flat pipe 100 passes through the opening of the second collecting pipe 20 to be connected to the second collecting pipe 20,
in a cross section orthogonal to the length direction of the first header 10 and the second header 20, in the width direction of the flat tube 100, the maximum distance between a first longitudinal side 103 of the flat tube 100 and an outer wall surface of the first header 10 adjacent to the first longitudinal side 103 is smaller than the maximum distance between a second longitudinal side 104 of the flat tube 100 and an outer wall surface of the first header 10 adjacent to the second longitudinal side 104 and/or the maximum distance between the first longitudinal side 103 of the flat tube 100 and an outer wall surface of the second header 20 adjacent to the first longitudinal side 103 is smaller than the maximum distance between the second longitudinal side 104 of the flat tube 100 and an outer wall surface of the second header 20 adjacent to the second longitudinal side 104
It should be understood here that the heat exchanger 1 may include a plurality of flat tubes, and a part of the plurality of flat tubes may be the flat tube 100 according to the embodiment of the present invention, and another part may be a flat tube in the related art, or all of the plurality of flat tubes may be the flat tube 100 according to the embodiment of the present invention. A fin 30 may be disposed between two adjacent flat tubes.
According to the heat exchanger 1 of the embodiment of the invention, by using the flat tube 100 of the embodiment of the invention, the advantages of reducing stress concentration, improving the tearing condition of the flat tube and the weld joint of the collector tube, being stable and reliable, and the like are achieved.
Optionally, the first header 10 and the second header 20 are round tubes, oval tubes or D-tubes. This may improve the applicability of the first header 10 and the second header 20.
Specifically, as shown in fig. 1-6, the first header 10 at least includes a first bending section 12, a first end 101 of the flat tube 100 is connected to the first bending section 12, the second header 20 at least includes a second bending section 22, a second end 102 of the flat tube 100 is connected to the second bending section 22,
the second longitudinal side 104 of the flat tube 100 is closer to the outer side of the first bent section 12 than the first longitudinal side 103 and/or the second longitudinal side 104 of the flat tube 100 is closer to the outer side of the second bent section 22 than the first longitudinal side 103. Therefore, the flat pipe 100 can be deviated to the extrusion side, the bending radius of the flat pipe 100 during bending is reduced, stress concentration of the bent flat pipe 100 is reduced, the tearing of a welding line between the flat pipe 100 and the collecting pipe is avoided, and the stability and the reliability of the flat pipe 100 are improved.
It should be understood that the outside of the first bending section 12 and the second bending section 22 refers to the side that is relatively stretched during bending, and the inside refers to the side that is relatively compressed during bending.
Further, as shown in fig. 1 to 6, in a cross section orthogonal to the length direction of the first bent section 12 and the second bent section 22, in the width direction of the flat tube 100, a maximum distance from a first longitudinal side 103 of the flat tube 100 to an outer wall surface of the first bent section 12 adjacent to the first longitudinal side 103 is smaller than a maximum distance from a second longitudinal side 104 of the flat tube 100 to an outer wall surface of the first bent section 12 adjacent to the second longitudinal side 104 and/or a maximum distance from the first longitudinal side 103 of the flat tube 100 to an outer wall surface of the second bent section 22 adjacent to the first longitudinal side 103 is smaller than a maximum distance from the second longitudinal side 104 of the flat tube 100 to an outer wall surface of the second bent section 22 adjacent to the second longitudinal side 104. Therefore, the eccentric arrangement of the flat pipe 100 can be facilitated, and the reliability of the flat pipe is further improved.
Specifically, as shown in fig. 1-3, the first length is equal to or greater than the length of the inner portion of the first longitudinal side 103 within the first header 10, and the second length is equal to or greater than the length of the second longitudinal side 104 within the first header 10. It should be understood herein that "the portion located inside the first header 10" refers to the length of the portion located inside the outer peripheral surface of the first header 10. This allows the first and second recesses 110, 120 to abut the wall of the first header 10 or to leave a gap between them for welding.
The third length is greater than or equal to the length of the inner portion of the first longitudinal side 103 within the second header 20, and the fourth length is greater than or equal to the length of the second longitudinal side 104 within the second header 20. It is to be understood herein that "the inner portion of the second header 20" refers to the length of the portion located inside the outer peripheral surface of the second header 20. This allows the second and fourth recesses 130, 140 to abut the wall of the second header 20 or to leave a gap between the walls of the second header 20 for welding.
Other constructions and operations of the heat exchanger 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. A flat tube, characterized in that the flat tube has a first end and a second end opposite to each other in a length direction of the flat tube, and the flat tube has a first longitudinal side and a second longitudinal side which are opposite to each other in the width direction of the flat tube, a first longitudinal side of the first end is provided with a first recess, a second longitudinal side of the first end is provided with a second recess, the first recess has a first length extending from an end face of the first end in a length direction of the flat tube and a first depth extending from the first longitudinal side in a width direction of the flat tube, the second recess has a second length extending from an end face of the second end in a length direction of the flat tube and has a second depth extending from the second longitudinal side in a width direction of the flat tube, wherein the first length and the second length are not equal to each other.
2. The flat tube according to claim 1, wherein the first longitudinal side of the second end is provided with a third recess, which has a third length extending from the end face of the second end in the longitudinal direction of the flat tube and a third depth extending from the first longitudinal side in the width direction of the flat tube.
3. Flat tube according to claim 2, characterised in that a second longitudinal side of the second end of the flat tube is provided with a fourth indentation having a fourth length extending from the end face of the second end in the length direction of the flat tube and having a fourth depth extending from the second longitudinal side in the width direction of the flat tube, the first length being equal to the third length and the second length being equal to the fourth length.
4. The flat tube of claim 3 wherein the first depth and the third depth are equal and the second depth and the fourth depth are equal.
5. The flat tube according to claim 3 or 4, wherein the second length is greater than the first length and the fourth length is greater than the third length.
6. Flat tube according to claim 3, characterised in that a fifth indentation is provided on a first longitudinal side of the first end of the flat tube, that a first projection is provided between the fifth indentation and the first indentation in the longitudinal direction of the flat tube, that the fifth indentation has a fifth length extending in the longitudinal direction of the flat tube and has a fifth depth extending from the first longitudinal side in the width direction of the flat tube.
7. The flat tube according to claim 6, wherein the sum of the first length, the fifth length and the length of the first protrusion in the length direction of the flat tube is equal to the second length.
8. The flat tube according to claim 6 or 7, wherein the first longitudinal side of the second end of the flat tube is provided with a sixth indentation, which comprises a second projection between the sixth indentation and the third indentation in the longitudinal direction of the flat tube, the sixth indentation having a sixth length extending in the longitudinal direction of the flat tube and having a sixth depth extending from the first longitudinal side in the width direction of the flat tube.
9. The flat tube according to claim 8, wherein the sum of the sixth length, the third length and the length of the second protrusion in the length direction of the flat tube is equal to the fourth length.
10. The flat tube of claim 1 wherein the ratio of the second length to the first length is 1-2.5.
11. A flat pipe, characterized in that the flat pipe has a first end and a second end opposite to each other in a length direction of the flat pipe, and the flat pipe has a first longitudinal side and a second longitudinal side opposite to each other in a width direction of the flat pipe, the first end of the first longitudinal side is provided with a first recess, the second end of the first longitudinal side is provided with a third recess, the first recess has a first length extending from an end surface of the first end in the length direction of the flat pipe and has a first depth extending from the first longitudinal side in the width direction of the flat pipe, the third recess has a third length extending from an end surface of the second end in the length direction of the flat pipe and has a third depth extending from the first longitudinal side in the width direction of the flat pipe, the first length and the third length are equal to each other.
12. A heat exchanger, comprising:
the first collecting pipe comprises openings which are arranged at intervals along the length direction of the first collecting pipe;
the second collecting pipe comprises openings which are arranged at intervals along the length direction of the second collecting pipe, and the first collecting pipe and the second collecting pipe are arranged in parallel;
flat pipe according to any of claims 1 to 11, having a first end connected to the first header pipe through an opening of the first header pipe and a second end connected to the second header pipe through an opening of the second header pipe,
in a cross section orthogonal to the length direction of the first collecting pipe and the second collecting pipe, in the width direction of the flat pipe, the maximum distance from a first longitudinal side of the flat pipe to the outer wall surface of the first collecting pipe adjacent to the first longitudinal side is smaller than the maximum distance from a second longitudinal side of the flat pipe to the outer wall surface of the first collecting pipe adjacent to the second longitudinal side and/or the maximum distance from the first longitudinal side of the flat pipe to the outer wall surface of the second collecting pipe adjacent to the first longitudinal side is smaller than the maximum distance from the second longitudinal side of the flat pipe to the outer wall surface of the second collecting pipe adjacent to the second longitudinal side.
13. The heat exchanger of claim 12, wherein the first header and the second header are round tubes, oval tubes, or D-tubes.
14. The heat exchanger according to claim 12 or 13, characterized in that a first longitudinal side of the first end is provided with a first recess having a first length extending from an end face of the first end in a length direction of the flat tube and having a first depth extending from the first longitudinal side in a width direction of the flat tube, a second longitudinal side of the first end is provided with a second recess having a second length extending from an end face of the second end in a length direction of the flat tube and having a second depth extending from the second longitudinal side in a width direction of the flat tube, a first longitudinal side of the second end is provided with a third recess having a third length extending from an end face of the second end in a length direction of the flat tube and having a third depth extending from the first longitudinal side in a width direction of the flat tube, a second longitudinal side of the second end is provided with a fourth concave portion, the fourth concave portion has a fourth length extending from an end face of the second end along the length direction of the flat tube and a fourth depth extending from the second longitudinal side along the width direction of the flat tube, the second length is greater than the first length, the fourth length is greater than the third length, the first depth is equal to the third depth, and the second depth is equal to the fourth depth.
15. The heat exchanger of claim 14, wherein the first length is equal to or greater than a length of an inner portion of the first header at a first longitudinal side, the second length is equal to or greater than a length of the second longitudinal side within the first header, the third length is equal to or greater than a length of the first longitudinal side within the second header, and the fourth length is equal to or greater than a length of the second longitudinal side within the second header.
16. The heat exchanger of claim 12, wherein the first header includes at least a first bend section to which a first end of the flat tubes are attached, the second header includes at least a second bend section to which a second end of the flat tubes are attached,
the second longitudinal side of the flat pipe is closer to the outer side of the first bending section than the first longitudinal side and/or the second longitudinal side of the flat pipe is closer to the outer side of the second bending section than the first longitudinal side.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262715.7A CN111765797A (en) | 2019-04-02 | 2019-04-02 | Flat pipe and heat exchanger with same |
| US17/599,876 US20220196344A1 (en) | 2019-04-02 | 2020-04-02 | Flat tube and heat exchanger provided with same |
| PCT/CN2020/083012 WO2020200285A1 (en) | 2019-04-02 | 2020-04-02 | Flat tube and heat exchanger having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262715.7A CN111765797A (en) | 2019-04-02 | 2019-04-02 | Flat pipe and heat exchanger with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111765797A true CN111765797A (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910262715.7A Pending CN111765797A (en) | 2019-04-02 | 2019-04-02 | Flat pipe and heat exchanger with same |
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| Country | Link |
|---|---|
| CN (1) | CN111765797A (en) |
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