CN219494967U - Header assembly and heat exchanger - Google Patents

Abstract

The present application relates to a header assembly and a heat exchanger, wherein the header assembly comprises a first member including a first body portion extending along a length thereof, the first body portion having opposed first and second surfaces, and at least one header portion located on the second surface of the first body portion; the first surface of the first main body part is provided with a plurality of first holes, and the first holes penetrate through the first surface and the second surface and are communicated with the tube cavity; a second member and a first plate, the first plate being located between the first member and the second member, the first plate being provided with a plurality of second holes penetrating the first plate in a thickness direction of the first plate; the second member is provided with a plurality of third holes penetrating the second member in a thickness direction of the second member, and one second hole communicates one first hole and one third hole. The header assembly is capable of withstanding high pressures while maintaining good distribution properties.

Description

Header assembly and heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a header assembly and a heat exchanger.

Background

The carbon dioxide (R744) is a natural working medium, the critical pressure of the natural working medium is higher (7.38 MPa), the working pressure of the transcritical refrigeration cycle is much higher than that of the traditional subcritical two-phase refrigeration cycle, and the working pressure is about 6-8 times of the pressure of the traditional refrigeration working medium CFC or HCFC system. Therefore, when carbon dioxide is used as a refrigerant, the carbon dioxide has high requirements on the pressure resistance of the heat exchanger, particularly the collecting pipe of the heat exchanger. The collecting pipes of the heat exchanger in the related art are mostly in circular pipe-shaped structures, so that the space of the inner cavity of the collecting pipe is large, the pressure resistance is poor, and the distribution uniformity is poor.

Disclosure of Invention

A first aspect of embodiments of the present application provides a header assembly that is capable of withstanding high pressures while maintaining good distribution performance.

Another aspect of the embodiments of the present application provides a heat exchanger having the header assembly of the first aspect, which has a better heat exchanging effect.

According to a first aspect of embodiments of the present application, there is provided a manifold assembly, comprising: a first member including a first body portion extending along a length thereof, the first body portion having opposed first and second surfaces, and at least one header portion located on the second surface of the first body portion;

the first surface of the first main body part is provided with a plurality of first holes, and the first holes penetrate through the first surface and the second surface and are communicated with the tube cavity;

a second member and a first plate located between the first member and the second member, the first plate being provided with a plurality of second holes penetrating the first plate in a thickness direction thereof;

the second member is provided with a plurality of third holes penetrating the second member in a thickness direction of the second member, one of the second holes communicating one of the first holes and one of the third holes.

In an alternative, the cross-sectional flow area of the second aperture is greater than the cross-sectional flow area of the first aperture, and the cross-sectional flow area of the second aperture is greater than the cross-sectional flow area of the third aperture.

In an alternative, the second member includes a second body portion and a first mounting portion, the first mounting portion being located on both sides of the second body portion in a length direction, the first mounting portion being bent to the second body portion, the first mounting portion being at least partially in contact with the first member and the first plate;

the third aperture is located in the second body portion of the second piece.

In an alternative scheme, the first installation part further comprises a plurality of flanges, the flanges are arranged on the first installation part at intervals along the length direction of the first installation part, and the flanges are at least partially contacted with the second surface.

In one alternative, the number of header portions is two,

the plurality of first holes comprise a plurality of first sub-holes and a plurality of second sub-holes, the plurality of second holes comprise a plurality of third sub-holes and a plurality of fourth sub-holes, the plurality of third holes comprise a plurality of fifth sub-holes and a plurality of sixth sub-holes, and the first sub-holes, the third sub-holes and the fifth sub-holes are communicated with the pipe cavity of one header; the second sub-bore, the fourth sub-bore, and the sixth sub-bore are in communication with the lumen of the other header.

The beneficial effects of this application are: according to a first aspect of the present application there is provided a header assembly comprising a first member, a second member and a first plate, the first plate being located between the first member and the second member, the first member comprising a first body portion and at least one header portion. The first holes on the first piece can distribute the refrigerant entering the header part to improve the uniformity of refrigerant distribution, and meanwhile, the integral structure of the header part and the first main body part can also improve the high pressure resistance of the whole first piece; after the heat exchange tube is inserted into the third hole of the second piece, the refrigerant sequentially passes through the first hole and the second hole after entering the header part, and then enters the heat exchange tube, and the second hole can buffer the refrigerant. The whole header assembly has better distribution performance while meeting the requirement of high pressure resistance.

According to another aspect of the present application there is provided a heat exchanger comprising: a first header assembly, a second header assembly and heat exchange tubes, the first header assembly being the header assembly of the first aspect;

the heat exchange tubes comprise a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, the plurality of first heat exchange tubes are arranged at intervals along the length direction of the first header assembly, one end of each first heat exchange tube along the length direction is inserted into the first sub-holes of the third holes, and the other end of each first heat exchange tube along the length direction is inserted into the second header assembly;

the plurality of second heat exchange tubes are arranged at intervals along the length direction of the first header assembly, one end of each second heat exchange tube along the length direction is inserted into the second sub-hole of the third hole, and the other end of each second heat exchange tube along the length direction is inserted into the second header assembly.

In an alternative, the cross-sectional flow area of the first heat exchange tube is greater than the cross-sectional flow area of the second heat exchange tube.

In an alternative, the thickness of the first heat exchange tube is defined as t ₁ The width of the first heat exchange tube is W ₁ The thickness of the second heat exchange tube is t ₂ The width of the second heat exchange tube is W ₂ ；

Then t ₁ And t ₂ The method meets the following conditions: t is t ₁ = t ₂ ，W ₁ And W is ₂ The method meets the following conditions: w (W) ₁ ＞W ₂ 。

In one alternative, the second header assembly includes: a second plate and a third plate provided with a plurality of fourth holes penetrating the third plate in a thickness direction thereof;

a third member provided with a plurality of fifth holes and a plurality of sixth holes penetrating the third member in a thickness direction of the third member, one of the fifth holes and one of the sixth holes communicating with one of the third holes;

the third plate is located between the second plate and the third piece; the other end of the first heat exchange tube along the length direction is inserted into the fifth hole, and the other end of the second heat exchange tube along the length direction is inserted into the sixth hole.

In an alternative, the third piece includes a third main body portion and a second mounting portion, the second mounting portion is located at two sides of the third main body portion along the length direction, the mounting portion is bent to the second main body portion, and the mounting portion is at least partially contacted with the second plate and the third plate;

the fifth aperture and the sixth aperture are located in the third body portion of the third piece.

In an alternative, the first heat exchange tube and the second heat exchange tube have a plurality of channels, a plurality of the channels communicating with the first header assembly and the second header assembly, the channels having a circular flow cross-section.

The beneficial effects of this application are: in the embodiment of the application, the heat exchanger comprises a first header assembly, a second header assembly and heat exchange tubes, wherein the first header assembly is the header assembly in the first aspect, so that the whole heat exchanger has better heat exchange performance while meeting the high pressure resistance performance; in addition, the heat exchange tube comprises a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, so that the structure of the whole heat exchanger is more compact while the heat exchange performance is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic illustration of the structure of a header assembly provided herein in one embodiment;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of an embodiment of the first member of FIG. 1;

FIG. 4 is a schematic view of an embodiment of the first plate of FIG. 1;

FIG. 5 is a schematic view of an embodiment of the second member of FIG. 1;

FIG. 6 is a schematic view of the structure of a header assembly provided herein in another embodiment;

FIG. 7 is a schematic cross-sectional view of FIG. 6;

FIG. 8 is a schematic view of an embodiment of the first member of FIG. 6;

FIG. 9 is a schematic view of an embodiment of the first plate of FIG. 6;

FIG. 10 is a schematic view of an embodiment of the second member of FIG. 6;

FIG. 11 is a schematic view of a heat exchanger according to an embodiment of the present disclosure;

FIG. 12 is a schematic top view of FIG. 11;

FIG. 13 is a schematic view of a second header assembly provided herein in one embodiment;

FIG. 14 is a schematic view of an embodiment of the third plate of FIG. 13;

fig. 15 is a schematic view of an embodiment of the third member of fig. 13.

Reference numerals: the first member 1, the first main body portion 11, the header portion 12, the first surface 111, the second surface 112, the tube wall 121, the first hole 113, the second member 2, the first plate 3, the second hole 31, the third sub-hole 311, the fourth sub-hole 312, the third hole 23, the fifth sub-hole 231, the sixth sub-hole 232, the second main body portion 21, the first mounting portion 22, the flange 221, the first sub-hole 114, the second sub-hole 115, the heat exchange tube 6, the first heat exchange tube 61, the second heat exchange tube 62, the second header assembly 7, the second plate 71, the third plate 72, the fourth hole 721, the third member 73, the fifth hole 731, the sixth hole 732, the third main body portion 733, and the second mounting portion 734.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The first aspect of the embodiments of the present application provides a header assembly, where the technical solution and the technical effects of the header assembly are described by taking the application of the header assembly to a parallel flow heat exchanger as an example, and certainly, the application field of the header assembly in the embodiments of the present application is not limited to the description herein, but may also be used in other heat exchangers, such as a serpentine tube heat exchanger, a plate fin heat exchanger, and the like.

As shown in fig. 1 to 5, a header assembly according to a first aspect of the present application specifically includes: the first member 1, the first member 1 includes a first body portion 11 extending in a longitudinal direction thereof, the first body portion 11 having opposite first surfaces 111 and 112, and at least one header portion 12, the header portion 12 being located on the first surface 112 of the first body portion 11. In the present embodiment, the first body portion 11 is a plate-like structure, and therefore, the first surface 111 and the first surface 112 refer to two outer surfaces of the plate-like structure having the largest surface area, and the header portion 12 is located on one of the two outer surfaces. The first body 11 and the header 12 may be integrally formed or may be fixedly connected by welding, etc., and because the header assembly is required to have high pressure resistance, the first body 11 and the header 12 are preferably integrally formed, and more specifically, the first body 11 and the header 12 are integrally formed by using an aluminum profile process, so that welding points can be reduced compared with the conventional connection of aluminum round tubes and a transfer block, and welding leakage rate can be improved in process assembly.

The header 12 includes a tube wall 121, where the tube wall 121 encloses a tube cavity forming the header 12, and the shape of the header 12 may be rectangular, polygonal, or circular, and the tube cavity formed by enclosing may be any one shape or a combination of shapes, and in this embodiment, the cross-sectional shapes of the header 12 and the tube cavity are described and illustrated as a circle.

A plurality of first holes 113 are provided in the first surface 111 of the first body portion 11, and the first holes 113 penetrate the first surface 111 and the first surface 112 and communicate with the lumen of the header portion 12. In the present embodiment, the plurality of first holes 113 are provided on the first body 11 at intervals along the longitudinal direction of the first body 11, that is, arranged along the longitudinal direction of the first body 11, but the arrangement of the first holes 113 is not limited to the arrangement along the longitudinal direction of the body, and adjacent first holes 113 may be arranged in a staggered manner. The plurality of first holes 113 are provided corresponding to the positions of the header 12, and when the header 12 is positioned at the intermediate position of the outer surface of the first body 11, the positions of the first holes 113 may be provided corresponding to the intermediate position of the first body 11 in the longitudinal direction.

A second member 2 and a first plate 3, the first plate 3 being located between the first member 1 and the second member 2, the first plate 3 being provided with a plurality of second holes 31, the second holes 31 penetrating the first plate 3 in a thickness direction of the first plate 3; when mounted, the first plate 3 is at least partially arranged in close contact between the first part 1 and the second part 2. The second member 2 is provided with a plurality of third holes 23, the third holes 23 penetrating the second member 2 in the thickness direction of the second member 2, and one second hole 31 communicating one first hole 113 and one third hole 23.

According to the heat exchange tube, the shapes of the first hole 113, the second hole 31 and the third hole 23 may be different, for example, when the heat exchange tube inserted into the third hole 23 is a micro-channel flat tube, the shape of the third hole 23 is a waist-shaped hole, so that a more smooth refrigerant flow channel is formed among the first hole 113, the second hole 31 and the third hole 23, the first hole 113 and the second hole 31 are also waist-shaped holes, and the first hole 113, the second hole 31 and the third hole 23 are all provided with chamfer designs, so that the flat tube is convenient to be assembled and has a guiding function.

As shown in fig. 1, in this embodiment, the first body 11 has a plate-like structure, and the first plate 3 and the second member 2 each have a mounting surface with a planar structure, so that after the first member 1, the first plate 3 and the second member 2 are mounted, the two members can be well bonded, the whole structure is more compact, and the pressure resistance is better. The first member 1 includes a first main body portion 11 and at least one header portion 12, the header portion 12 and the first plate 3 being separated by the first main body portion 11 and then communicating with each other through a plurality of first holes 113 provided in the first main body portion 11 and a plurality of second holes 31 provided in the first plate 3. The header assembly ensures the pressure resistance, and the plurality of first holes 113 formed in the first body 11 can also distribute the refrigerant entering the header assembly, so that the refrigerant enters the second holes 31 more uniformly, and then enters the third holes 23 from the second holes 31, thereby improving the distribution effect of the header assembly on the refrigerant and ensuring more uniform distribution.

Taking natural working carbon dioxide (R744) as an example, odp=0, gwp=1. The R744 is used as a refrigerant, has no damage to the atmospheric ozone layer, can reduce global greenhouse effect, has low acquisition cost, can greatly reduce the replacement cost of the refrigerant, saves energy, fundamentally solves the problem of pollution damage of compound refrigerants to the environment, has good economical efficiency, is very suitable for being used as a refrigerant working medium and is a future trend, but the critical pressure of the R744 is higher (7.38 MPa), and the working pressure of the transcritical refrigeration cycle is much higher than that of the traditional subcritical two-phase refrigeration cycle, which is about 6-8 times of the pressure of the traditional refrigeration working medium CFC or HCFC system. Therefore, there is a high demand for pressure resistance of the heat exchanger and its components. The header assembly in this embodiment optimizes the interior space that has reduced the pressure manifold, has solved header inner chamber space big, pressure-resistant ability poor problem, has promoted the bearing capacity of heat exchanger greatly in the header assembly simultaneously, has added first board 3 in the header assembly, and first board 3 can be aluminum plate, can form the pressure drop through the change of aperture size and space size between each hole and improve the homogeneity that refrigerant distributes for whole structure satisfies the requirement of high pressure-resistant and high heat exchange ability when improving distribution homogeneity. In addition, the whole header assembly greatly reduces the internal space, improves the compressive strength and simultaneously greatly reduces the filling amount of the refrigerant.

In one embodiment, as shown in FIG. 2, the cross-sectional flow area of the second aperture 31 is greater than the cross-sectional flow area of the first aperture 113, and the cross-sectional flow area of the second aperture 31 is greater than the cross-sectional flow area of the third aperture 23. More specifically, a larger flow cross-sectional area means that one of the opening width or height of the second hole 31 is larger than the first hole 113 and the third hole 23, or that both the opening width and the height of the second hole 31 are larger than the first hole 113 and the third hole 23.

After the refrigerant enters the tube cavity of the header 12, the refrigerant enters the second hole 31 of the first plate 3 from the first hole 113 of the first body 11, and then enters the third hole 23 of the second member 2 (after the header assembly is connected with the heat exchange tube to form a heat exchanger, the refrigerant can also directly enter the heat exchange tube from the second hole 31 due to the insertion of the heat exchange tube). The refrigerant firstly enters the first hole 113 with smaller flow cross section, then enters the second hole 31 with larger flow cross section, and finally enters the heat exchange tube channel/third hole 23 with smaller flow cross section, and the arrangement structure of the size of the holes can enable the refrigerant to form certain flow resistance between the two adjacent holes, so that the uniformity of distribution of the refrigerant when entering the tube cavity of the header 12 is improved. The second hole 31 has a larger flow cross-sectional area, the refrigerant forms a buffer in the space of the second hole 31, and finally flows into the heat exchange tube channel/the third hole 23, and the change of the flow cross-sectional area can also form pressure drop to improve the uniformity of refrigerant distribution.

As shown in fig. 1 and 5, in a specific embodiment, the second member 2 includes a second body portion 21 and first mounting portions 22, the first mounting portions 22 are located at both sides of the second body portion 21 in the length direction, the first mounting portions 22 are bent to the second body portion 21, and the first mounting portions 22 are at least partially in contact with the first member 1 and the first plate 3; the third aperture 23 is located in the second body portion 21 of the second member 2. In this embodiment, before the second member 2 is mounted on the first member 1 and the first plate 3, the cross section of the second member 2 is in a U-shaped structure with one end opened, and when the second member is mounted, the second plate 71 and the first member 1 are sequentially placed into the open end of the second member 2, and then the first mounting portion 22 of the second member 2 is bent, so that the first member 1 and the first plate 3 are tightly clamped with the second member 2. The second member 2 is used for plugging the heat exchange tube, and simultaneously, the first member 1 and the first plate 3 are clamped, so that the first member 1, the first plate 3 and the second member 2 form a firm whole, and in some more specific embodiments, a brazing sheet can be arranged between the first member 1, the first plate 3 and the second member 2, and the first member 1, the first plate 3 and the second member 2 can be tightly welded together through the front brazing sheet.

As shown in fig. 5, in some other embodiments, the first mounting portion 22 may further include a plurality of flanges 221, where the plurality of flanges 221 are disposed on the first mounting portion 22 at intervals along a length direction of the first mounting portion 22, and at least a portion of the flanges 221 is in contact with the first surface 112. The flange 221 may preferably bend the first mounting portion 22 to engage the first member 1 and the first plate 3. In the present embodiment, the structure of the flange 221 is rectangular, but may be zigzag or other shapes in other embodiments, and will not be described herein in detail.

As shown in fig. 6 to 10, in one embodiment, the number of the header portions 12 is two, that is, the first surface 112 of the first body portion 11 is provided with two header portions 12, one of the two header portions 12 may serve as an inlet header, the other may serve as an outlet header, or both of the header portions 12 may serve as an inlet header/outlet header. Since the number of the header portions 12 is two, the plurality of first holes 113 also includes a plurality of first sub-holes 114 and a plurality of second sub-holes 115, the plurality of first sub-holes 114 being arranged at intervals along the length direction of the first main body portion 11, and the plurality of second sub-holes 115 being also arranged at intervals along the length direction of the first main body portion 11. Note that, the positions of the first sub-holes 114 and the second sub-holes 115 may be flush along the width direction of the first main body 11, or may be staggered, and in this embodiment, the positions of the first sub-holes 114 and the second sub-holes 115 are flush along the width direction of the first main body 11.

In this embodiment, the plurality of second holes 31 includes a plurality of third sub-holes 311 and a plurality of fourth sub-holes 312, the plurality of third holes 23 includes a plurality of fifth sub-holes 231 and a plurality of sixth sub-holes 232, and the first sub-holes 114, the third sub-holes 311, and the fifth sub-holes 231 communicate with the lumen of one header 12; the second sub-bore 115, the fourth sub-bore 312, and the sixth sub-bore 232 communicate with the lumen of the other header 12. More specifically, the third sub-aperture 311 has a cross-sectional flow area greater than the cross-sectional flow areas of the first sub-aperture 114 and the fifth sub-aperture 231, and the fourth sub-aperture 312 has a cross-sectional flow area greater than the cross-sectional flow areas of the second sub-aperture 115 and the sixth sub-aperture 232. The header assembly of the present embodiment is identical to the header assembly of the above only in the number of header portions 12 and the corresponding number of communication holes, and other structures are identical to the structure of the header portions 12 mentioned above, so that a detailed description thereof will not be given.

Another aspect of the embodiments of the present application also provides a heat exchanger, including: a first header assembly, which is the header assembly of the above-described embodiment, a second header assembly 7, and heat exchange tubes 6;

the heat exchange tubes 6 comprise a plurality of first heat exchange tubes 61 and a plurality of first heat exchange tubes 62, the plurality of first heat exchange tubes 61 are arranged at intervals along the length direction of the first header assembly, one end of the first heat exchange tube 61 along the length direction is inserted into the fifth sub-hole of the second member 2, and the other end of the first heat exchange tube 61 along the length direction is inserted into the second header assembly 7;

the plurality of first heat exchange tubes 62 are arranged at intervals along the length direction of the first header assembly, one end of the first heat exchange tube 62 along the length direction is inserted into the sixth sub-hole of the second member 2, and the other end of the first heat exchange tube 62 along the length direction is inserted into the second header assembly 7. The first heat exchange tube 61 and the first heat exchange tube 62 may be arranged flush or staggered in height according to the positional relationship of the fifth sub-hole and the sixth sub-hole, and in this embodiment, since the fifth sub-hole and the sixth sub-hole are arranged flush along the width direction of the second member 2, the first heat exchange tube 61 and the first heat exchange tube 62 are also arranged flush. When one of the two header portions 12 is used as an inlet header and the other is used as an outlet header, the first heat exchange tubes 61 and the first heat exchange tubes 62 constitute a double-row return flow path of the heat exchanger, and the overall heat exchange capacity of the heat exchanger is improved. In addition, the first header assembly and the second header assembly 7 can be added with a partition plate to realize multi-flow arrangement, so that the heat exchange capacity of the heat exchanger is further improved.

In the heat exchanger of the present embodiment, in the operating state, the refrigerant enters from one header 12 of the first header assembly, then enters the second header assembly 7 through the first heat exchange tube 61, then enters the first heat exchange tube 62 through the second header assembly 7, and finally flows out from the other header 12 communicating with the first heat exchange tube 62. Under the action of the first header assembly, the refrigerant entering each first heat exchange tube 61 and each first heat exchange tube 62 is distributed more uniformly, so that the heat exchange effect of the refrigerant in the first heat exchange tubes 61 and 62 is ensured.

In one embodiment, the cross-sectional flow area of the first heat exchange tube 61 is greater than the cross-sectional flow area of the first heat exchange tube 62. More specifically, the thickness t of the first heat exchange tube 61 is defined as ₁ The width of the first heat exchange tube 61 is W ₁ The first heat exchange tube 62 has a thickness t ₂ The first heat exchange tube 62 has a width W ₂ The method comprises the steps of carrying out a first treatment on the surface of the Then t ₁ And t ₂ The method meets the following conditions: t is t ₁ = t ₂ ，W ₁ And W is ₂ The method meets the following conditions: w (W) ₁ ＞W ₂ 。

As shown in fig. 13-15, in one particular embodiment, the second header assembly 7 includes: the second plate 71 and the third plate 72, the second plate 71 and the third plate 72 being both plate-like structures, but the second plate 71 being only plate-like structures having no openings, the third plate 72 being provided with a plurality of fourth holes 721, the fourth holes 721 penetrating the third plate 72 in the thickness direction of the third plate 72;

the third member 73, the third member 73 being provided with a plurality of fifth holes 731 and a plurality of sixth holes 732, the fifth holes 731 and the sixth holes 732 penetrating the third member 73 in the thickness direction of the third member 73, one fifth hole 731 and one sixth hole 732 communicating with one third hole 23;

the third plate 72 is located between the second plate 71 and the third member 73; the other end of the first heat exchange tube 61 in the length direction is inserted into the fifth hole 731 of the second header assembly 7, and the other end of the first heat exchange tube 62 in the length direction is inserted into the sixth hole 732 of the second header assembly 7. Since the first header assembly and the second header assembly 7 in this embodiment are different in structure, an asymmetric structure is adopted, and when no other accessory is provided, the installation has no directivity requirement, and the situation of reverse installation is avoided.

In the present embodiment, the fifth hole 731 and the sixth hole 732 are used to insert the first heat exchange tube 61 and the first heat exchange tube 62, respectively, and therefore, the fifth hole 731 and the sixth hole 732 may be sized to be insertable into the corresponding heat exchange tube 6. The fourth hole 721 is for guiding the refrigerant flowing into the fifth hole 731 into the sixth hole 732 or guiding the refrigerant flowing into the sixth hole 732 into the fifth hole 731, and thus has a flow cross-sectional area not smaller than the sum of the flow cross-sectional areas of the fifth hole 731 and the sixth hole 732. In the present embodiment, the fourth hole 721 penetrates the third plate 72, but the fourth hole 721 may have a certain depth for the refrigerant to flow back regardless of the penetration of the third plate 72.

In the heat exchanger of the present embodiment, in the operating state, the refrigerant enters from one header 12 of the first header assembly, then enters the second header assembly 7 through the first heat exchange tube 61, turns back in the fourth hole 721, enters the first heat exchange tube 62, and finally flows out from the other header 12 communicating with the first heat exchange tube 62. Since the fourth hole 721 only diverts the refrigerant, and does not affect the distribution effect of the refrigerant, the refrigerant entering the first heat exchange tube 62 can also maintain uniformity, thereby ensuring the heat exchange effect of the refrigerant in the first heat exchange tube 62.

As shown in fig. 15, in one embodiment, the third member 73 includes a third main body portion 733 and a second mounting portion 734, the second mounting portion 734 being located on both sides of the third main body portion 733 in the longitudinal direction, the mounting portion being bent to the second main body portion 21, the mounting portion being at least partially in contact with the second plate 71 and the third plate 72; the fifth aperture 731 and the sixth aperture 732 are located in the third body portion 733 of the third member 73. In this embodiment, the structure of the third member 73 is similar to that of the second member 2, and the main function of the third member 73 is to connect the corresponding parts of the heat exchange tube 6 in a plugging manner, so that the structure of the third member 73 is not repeated, and it should be noted that the structure of the third member 73 may be the same as or different from that of the second member 2.

In one embodiment, the first heat exchange tubes 61 and 62 have a plurality of channels communicating with the first header assembly and the second header assembly 7, and the flow cross-section of the channels is circular. The heat exchanger further comprises a heat radiating member, and the heat radiating member can be a heat exchanging fin, such as a zigzag heat exchanging fin, a corrugated heat exchanging fin and the like. Wherein, the radiating piece is fixed to be set up on flat pipe through modes such as brazing.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (11)

1. A header assembly, comprising:

a first member including a first body portion extending along a length thereof, the first body portion having opposed first and second surfaces, and at least one header portion located on the second surface of the first body portion;

the first surface of the first main body part is provided with a plurality of first holes, and the first holes penetrate through the first surface and the second surface and are communicated with the tube cavity;

a second member and a first plate located between the first member and the second member, the first plate being provided with a plurality of second holes penetrating the first plate in a thickness direction thereof;

the second member is provided with a plurality of third holes penetrating the second member in a thickness direction of the second member, one of the second holes communicating one of the first holes and one of the third holes.

2. The header assembly of claim 1, wherein the second bore has a cross-sectional flow area greater than a cross-sectional flow area of the first bore, the second bore having a cross-sectional flow area greater than a cross-sectional flow area of the third bore.

3. The header assembly of claim 2, wherein the second member includes a second body portion and a first mounting portion on either side of the second body portion in a length direction, the first mounting portion being folded over the second body portion, the first mounting portion being at least partially in contact with the first member and the first plate;

the third aperture is located in the second body portion of the second piece.

4. A header assembly in accordance with claim 3 wherein said first mounting portion further comprises a plurality of flanges disposed at spaced apart intervals along a length of said first mounting portion, said flanges at least partially contacting said second surface.

5. The header assembly of any one of claims 1 to 4, wherein the number of header portions is two,

the plurality of first holes comprise a plurality of first sub-holes and a plurality of second sub-holes, the plurality of second holes comprise a plurality of third sub-holes and a plurality of fourth sub-holes, the plurality of third holes comprise a plurality of fifth sub-holes and a plurality of sixth sub-holes, and the first sub-holes, the third sub-holes and the fifth sub-holes are communicated with the pipe cavity of one header;

the second sub-bore, the fourth sub-bore, and the sixth sub-bore are in communication with the lumen of the other header.

6. A heat exchanger comprising a first header assembly, a second header assembly, and heat exchange tubes, the first header assembly being the header assembly of claim 5;

the heat exchange tubes comprise a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, the plurality of first heat exchange tubes are arranged at intervals along the length direction of the first header assembly, one end of each first heat exchange tube along the length direction is inserted into the first sub-holes of the third holes, and the other end of each first heat exchange tube along the length direction is inserted into the second header assembly;

the plurality of second heat exchange tubes are arranged at intervals along the length direction of the first header assembly, one end of each second heat exchange tube along the length direction is inserted into the second sub-hole of the third hole, and the other end of each second heat exchange tube along the length direction is inserted into the second header assembly.

7. The heat exchanger of claim 6, wherein the cross-sectional flow area of the first heat exchange tube is greater than the cross-sectional flow area of the second heat exchange tube.

8. The heat exchanger of claim 7, wherein the first heat exchange tube is defined to have a thickness t ₁ The width of the first heat exchange tube is W ₁ The thickness of the second heat exchange tube is t ₂ The width of the second heat exchange tube is W ₂ ；

Then t ₁ And t ₂ The method meets the following conditions: t is t ₁ = t ₂ ，W ₁ And W is ₂ The method meets the following conditions: w (W) ₁ ＞W ₂ 。

9. The heat exchanger according to any one of claims 6 to 8, wherein the second header assembly includes: a second plate and a third plate provided with a plurality of fourth holes penetrating the third plate in a thickness direction thereof;

a third member provided with a plurality of fifth holes and a plurality of sixth holes penetrating the third member in a thickness direction of the third member, one of the fifth holes and one of the sixth holes communicating with one of the third holes;

the third plate is located between the second plate and the third piece; the other end of the first heat exchange tube along the length direction is inserted into the fifth hole, and the other end of the second heat exchange tube along the length direction is inserted into the sixth hole.

10. The heat exchanger according to claim 9, wherein the third member includes a third main body portion and second mounting portions on both sides of the third main body portion in a longitudinal direction, the mounting portions being folded over the second main body portion, the mounting portions being at least partially in contact with the second plate and the third plate;

the fifth aperture and the sixth aperture are located in the third body portion of the third piece.

11. The heat exchanger of claim 9, wherein the first heat exchange tube and the second heat exchange tube have a plurality of channels, a plurality of the channels communicating with the first header assembly and the second header assembly, the channels having a circular flow cross-section.