CN216205480U - Micro-channel heat exchanger and heat exchange system - Google Patents

Abstract

The application relates to a microchannel heat exchanger and heat transfer system, microchannel heat exchanger's heat transfer subassembly includes: the first pipe comprises a first peripheral wall and a first cavity, the wall surrounding the first cavity comprises the first peripheral wall, and the first peripheral wall comprises an inner wall surface and an outer wall surface; at least a portion of the first member is positioned within the first lumen and has a length in a direction of the length of the first tube; at least a portion of the retaining member is positioned within the first cavity, the retaining member including a first aperture extending through the first member, a portion of the first member being positioned within the first aperture, the retaining member including a first sidewall, the first sidewall including a first sidewall surface, the first sidewall surface being connected to the first perimeter wall; in any cross section of the first tube, the maximum projected length of the first side wall surface of the holder is L1, the maximum projected length of the inner wall surface of the first peripheral wall is L2, and 0.6< L1/L2< 0.9. The first piece is supported and fixed through the retaining piece, so that the fixing of the internal structure of the assembly is facilitated, and the heat exchange performance of the heat exchanger is improved.

Description

Micro-channel heat exchanger and heat exchange system

Technical Field

The application relates to the technical field of heat exchange, in particular to a micro-channel heat exchanger and a heat exchange system.

Background

The microchannel heat exchanger assembly carries heat exchange functionality in an air conditioning system and, in some applications, needs to include a distributor tube disposed in the manifold to regulate refrigerant distribution. The distribution pipe is assembled in the collecting main, when the heat exchange pipe works, the distribution pipe can vibrate, which can affect the refrigerant distribution and the heat exchange performance, so that a maintaining piece is required to be installed to position the distribution pipe. If the holder is oversized, the flow of refrigerant in the manifold is affected and the distributor tube stress concentration is likely to result. If the holder is too small, the dispensing tube cannot be positioned and may even vibrate together, causing noise.

SUMMERY OF THE UTILITY MODEL

The application provides a microchannel heat exchanger and heat transfer system, this microchannel heat exchanger include heat exchange assembly, and heat exchange assembly includes the holder, is favorable to subassembly inner structure fixed, helps improving the heat transfer performance of heat exchanger.

This application first aspect provides a microchannel heat exchanger, microchannel heat exchanger includes heat exchange assembly, heat exchange assembly includes:

a first tube including a first peripheral wall and a first cavity, a wall enclosing the first cavity including the first peripheral wall, the first peripheral wall including an inner wall surface and an outer wall surface;

a first member, at least a portion of which is located within the first lumen and has a length in a direction of the length of the first tube;

a retainer, at least a portion of the retainer being located within the first cavity, the retainer including a first aperture extending therethrough, a portion of the first member being located within the first aperture, the retainer further including a first sidewall, the first sidewall including a first sidewall surface, the first sidewall surface being connected to the first perimeter wall;

in any cross section of the first tube, a maximum projected length of the first side wall surface of the holder is L1, a maximum projected length of an inner wall surface of the first peripheral wall is L2, and 0.6< L1/L2< 0.9.

In some embodiments, the first tube includes a first slot extending through the first perimeter wall, a portion of the retainer is located within the first slot, the first tube includes a second aperture, and a wall surrounding the second aperture includes a wall of the retainer and a portion of the first perimeter wall.

In some embodiments, the retainer includes a second sidewall directly or indirectly connected to the first sidewall, the retainer further including a first protrusion, the second sidewall including a portion of the first protrusion, a portion of the first protrusion being located within the second aperture.

In some embodiments, the retainer includes a first recess, and the second sidewall includes a portion of the first recess, the first recess facing the second aperture.

In some embodiments, a projection of at least part of the first porthole and a projection of part of the first recess coincide on a longitudinal section parallel to the first tube length direction and including the first tube axis.

In some embodiments, the retainer further comprises one or more first through-holes having a hydraulic diameter smaller than a hydraulic diameter associated with the first aperture.

In some embodiments, the holder further comprises two or more protrusions spaced apart along a circumference of the holder, the holder being connected to the first peripheral wall by the protrusions.

In some embodiments, the first tube includes a third aperture lane between two of the bosses in a circumferential direction of the holder.

In some embodiments, a direction perpendicular to a length direction of the first tube is defined as a first direction, a maximum length dimension of the holder projected in the first direction is D, and a hydraulic diameter of the first tube is D, on any cross section of the first tube, and the following relation is satisfied: D/D < 0.7.

The second aspect of the present application provides a heat exchange system, including the above microchannel heat exchanger, the heat exchange assembly of the microchannel heat exchanger includes: the heat exchange tube comprises a first tube and a second tube which are arranged at intervals, heat exchange tubes, a plurality of heat exchange tubes are arranged at intervals along the length direction of the first tube, each heat exchange tube comprises a plurality of channels extending along the length direction of the heat exchange tube, the channels are arranged at intervals along the width direction of the heat exchange tube, the heat exchange tube is directly or indirectly connected with the first tube, and the heat exchange tube is directly or indirectly connected with the second tube; the fins are connected with the heat exchange tubes, part of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube, and the number of the fins is multiple.

The beneficial effect of this application is: when the first piece is placed in the first pipe, the first piece is supported and fixed through the retaining piece, and when the length of the first piece is too long, the retaining piece can be arranged to support and fix the first piece along the length direction L of the heat exchange assembly, so that on one hand, the bending deformation of the first piece in the using process can be reduced, the distribution stability of the first piece is improved, and the heat exchange efficiency of the heat exchange assembly is improved; on the other hand, the retaining piece can reduce the vibration or the vibration of the first piece during work, so that abnormal sound caused by the vibration or the vibration can be reduced. The ratio of the projection length L of the first side wall surface of the retaining piece to the projection length L of the inner wall surface of the first peripheral wall is 0.6 & lt L1/L2 & lt 0.9, when the retaining piece is a circular part, the central angle of the circle where the retaining piece is located is larger than 180 degrees, namely the retaining piece can be larger than half of the circle, so that the retaining piece can be connected with the two ends of the first pipe in the diameter direction of the first pipe, the supporting stability of the retaining piece in the first pipe and the fixing effect of the retaining piece in the first pipe are improved, meanwhile, a gap is formed between the retaining piece and the inner wall surface of the first peripheral wall, and the gap can be used for refrigerant circulation.

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 structural view of a heat exchange assembly provided herein in one embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the heat exchange assembly of FIG. 1 from another perspective;

FIG. 4 is a schematic view of the internal structure of the first tube of FIG. 1 in one embodiment;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the first tube of FIG. 1 taken along the width direction thereof;

FIG. 7 is a schematic view of the inner structure of the first pipe in FIG. 1 in another embodiment;

FIG. 8 is an enlarged view of portion C of FIG. 7;

FIG. 9 is a schematic view of the structure of FIG. 7 from another perspective;

FIG. 10 is a schematic cross-sectional view of the first tube of FIG. 1 taken along the width direction thereof;

FIG. 11 is a cross-sectional structural view of a retainer according to one embodiment of the present application;

FIG. 12 is a cross-sectional structural view of a retainer according to another embodiment of the present application;

FIG. 13 is a cross-sectional structural view of a retainer according to yet another embodiment of the present application;

fig. 14 is a cross-sectional structural view of a retainer according to yet another embodiment of the present application.

Reference numerals:

1-a first tube;

11-a first peripheral wall;

111-inner wall surface;

112-outer wall surface;

12-a first cavity;

13-a second porthole;

14-a second via;

15-a first slot;

16-a third porthole;

2-a first piece;

21-opening a hole;

3-a holder;

31-a first porthole;

32-a first sidewall surface;

33-a second side wall;

34-a first projection;

35-a first recess;

36-a first via;

37-a boss;

4-a second tube;

5, heat exchange tubes;

51-a fin;

d-a maximum length dimension in the first direction;

l-length direction;

w-width direction.

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

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of 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 type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used 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 addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

To more clearly describe the microchannel heat exchanger and heat exchange system in the present application, it is defined herein that, as shown in fig. 3, the length direction of the heat exchange assembly is L, and the width direction of the heat exchange assembly is W. It should be noted that, the length direction L of the heat exchange assembly is the same as the length direction of the first tube 1, and therefore, the length direction of the first tube 1 is the length direction L of the heat exchange assembly hereinafter.

As shown in fig. 1 and fig. 3, the present application provides a microchannel heat exchanger, where the microchannel heat exchanger includes a heat exchange assembly, the heat exchange assembly can be applied to a heat exchange system, and specifically, with reference to fig. 4, the heat exchange assembly includes: a first tube 1, a first piece 2 and a holder 3, the first tube 1 comprising a first circumferential wall 11 and a first cavity 12, the wall enclosing the first cavity 12 comprising the first circumferential wall 11, the first circumferential wall 11 comprising an inner wall surface 111 and an outer wall surface 112. At least part of the first member 2 is located in the first cavity 12 and has a length in the length direction L of the first tube 1, and at least part of the holder 3 is located in the first cavity 12. The holder 3 comprises a first bore 31, the first bore 31 extending through the holder 3, a portion of the first member 2 being located in the first bore 31, the holder 3 further comprising a first side wall, the first side wall comprising a first side wall surface 32, the first side wall surface 32 being connected to the first peripheral wall 11. In any cross section of the first tube 1, the maximum projected length of the first side wall surface 32 of the holder 3 is L1, the maximum projected length of the inner wall surface 111 of the first peripheral wall 11 is L2, and 0.6< L1/L2< 0.9.

In this embodiment, the first side wall surface 32 of the holder 3 is connected to the first peripheral wall 11, and specifically, two cases may be included, the first case: the retainer 3 is entirely located in the first cavity 12 of the first pipe 1, and the first side wall surface 32 of the retainer 3 is in contact with a part of the inner wall surface 111 of the first peripheral wall 11, that is, the retainer 3 is connected with a part of the first peripheral wall 11, so that the retainer 3 can fix the first member 2 at a preset position of the first pipe 1 by connecting the retainer 3 with the inner wall surface 111 of the first peripheral wall 11. The second case: the holder 3 is partly located in the first chamber 12 and partly protrudes from the first chamber 12, the part protruding from the first chamber 12 is connected to the first peripheral wall 11, and the first side wall surface 32 is connected to the first peripheral wall 11. The holder 3 comprises a first hole 31, the first member 2 is arranged in the first pipe 1 through the first hole 31, and the holder 3 can play a role of supporting and fixing the first member 2. The first part 2 is supported and fixed through the retaining pieces 3, when the length of the first part 2 is too long, the retaining pieces 3 can be arranged to support and fix the first part 2 along the length direction L of the heat exchange assembly, so that on one hand, the bending deformation of the first part 2 in the use process can be reduced, the channel area of the first part 2 for the circulation of the refrigerant cannot be reduced, and the heat exchange efficiency in the heat exchange assembly is improved; on the other hand, the holding member 3 can reduce the vibration or shock generated by the first member 2 during operation, thereby reducing the abnormal noise caused by the vibration or shock.

As shown in fig. 2 to 4, the first pipe 1 may be a collecting pipe, the first member 2 may be a distributing pipe, the first member 2 is located in the first cavity 12, the first member 2 is provided with a plurality of openings 21, the refrigerant enters the first cavity 12 of the first pipe 1 through the openings 21, the first pipe 1 is provided with a second slot 14, and the heat exchange pipe is welded and fixed with the first pipe 1 by inserting the second slot 14. The holder 3 and the first peripheral wall 11 may be connected by abutment, welding, or the like.

In one embodiment, as shown in fig. 4 and 5, the holder 3 is located in the first cavity 12, and the ratio of the maximum projection length L1 of the first side wall surface 32 of the holder 3 to the maximum projection length L2 of the inner wall surface 111 of the first peripheral wall 11 is 0.6< L1/L2<0.9, where it should be noted that, when the holder 3 is a part of a circle, the projection length of the first side wall surface 32 on any cross section of the first tube 1 is the arc length of the first side wall surface 32, and the projection length of the first peripheral wall 11 on any cross section of the first tube 1 is the circumference of a circle with the inner diameter of the first tube 1 as the diameter. When the retainer 3 is a circular part, the central angle of the circle where the retainer 3 is located is greater than 180 °, that is, the retainer 3 is greater than half of the circle, so that the retainer 3 can be connected with both ends of the first pipe 1 in the diameter direction of the first pipe 1, the support stability of the retainer 3 in the first pipe 1 and the fixing effect of the retainer 3 in the first pipe 1 are improved, and meanwhile, a gap is formed between the retainer 3 and the inner wall surface 111 of the first peripheral wall 11, and the gap can be used for the circulation of refrigerant.

In some embodiments, as shown in fig. 6 and 11, the first side wall surface 32 of the holder 3 is connected with the inner wall surface 111 of the first peripheral wall 11, and since L1/L2 is greater than 0.6 and less than 0.9, the maximum size of the holder 3 is necessarily equal to the inner diameter of the first pipe 1, and when the holder 3 is placed in the first pipe 1, the cross-sectional area of the holder 3 is greater than half of the cross-sectional area of any cross-sectional area of the first pipe 1, so that the situation that the holder 3 is placed in the first pipe 1 and slides down automatically due to insecurity can be reduced, and the holder 3 can stably support the first member 2.

In some embodiments, as shown in fig. 10 and 12, the holder 3 includes at least two or more protrusions 37, the protrusions 37 are spaced apart from each other along the circumferential direction of the holder 3, and the holder 3 is connected to the first circumferential wall 11 by the protrusions 37.

In some embodiments, as shown in fig. 9, the first tube 1 comprises a first slot 15, the first slot 15 extending through the first perimeter wall 11, as shown in fig. 7 and 8, a portion of the retainer 3 being located within the first slot 15, the first tube 1 comprising the second aperture 13, the wall surrounding the second aperture 13 comprising the retainer 3 and a portion of the first perimeter wall 11.

In some embodiments, a portion of the retainer 3 is located within the first slot 15 and is connected to the first slot 15, and the first slot 15 is capable of restricting movement of the retainer 3 along the length direction L of the first tube 1. In order to better limit the moving distance of the retainer 3 along the length direction L of the first pipe 1, the first slot hole 15 and the retainer 3 may be in interference fit. When a part of the retainer 3 is inserted into the first slot hole 15, the bottom wall of the first slot hole 15 can restrict the movement of the retainer 3 in the radial direction of the first pipe 1.

Wherein, refer to fig. 10, after the holder 3 is placed in the first tube 1, part of the side wall of the holder 3 and the first peripheral wall 11 can be surrounded to form a second hole 13, the second hole 13 is used for the circulation of the refrigerant, on one hand, the holder 3 can effectively fix the first piece 2 in the preset position, and further improve the stability of the distribution tube, which is helpful for improving the heat exchange performance of the heat exchange assembly, on the other hand, by setting the second hole 13, the flow resistance of the refrigerant in the first tube 1 is facilitated to be reduced, which is beneficial for adjusting the distribution of the refrigerant, thereby improving the heat exchange efficiency of the heat exchange assembly.

In some embodiments, the holder 3 includes at least two or more protrusions 37, the protrusions 37 are located in the first slot 15, the protrusions 37 cooperate with the first slot 15 to limit the movement of the holder 3 along the length direction of the first pipe 1, the holder 3 can completely extend out of the first slot through the protrusions 37 to be connected with the first peripheral wall 11, so that the first side wall surface 32 of the holder 3 is in connection fit with the inner wall surface 111 of the first peripheral wall 11, and the first side wall surface 32 is in close contact with the first peripheral wall 11, the stability of the fit between the holder 3 and the first pipe 1 can be further increased, and the situation that the first piece 2 swings or vibrates along the radial direction of the first pipe 1 can be further reduced.

Alternatively, in some embodiments, as shown in fig. 10, the protrusions 37 may also partially protrude through the first slot, another part of the protrusions 37 is still located in the first tube 1, the cooperation is such that two adjacent protrusions 37 and the third slot 16 can be formed between the first sidewall surface 32 and the first peripheral wall 11 of the holder 3, and the third slots 16 are separated by the protrusions 37.

In some embodiments, the first tube 1 comprises a third porthole 16, the third porthole 16 being located between two bosses 37 in the circumferential direction of the holder 3.

In this embodiment, as shown in fig. 10, the holder 3 is connected to the first peripheral wall 11 through the protruding portion 37, for example, by abutting or welding, so that the first side wall surface 32 and the first peripheral wall 11 can enclose the third hole passage 16, and the third hole passage 16 can also be used for flowing the refrigerant, thereby reducing the flowing resistance of the refrigerant in the first tube 1 and improving the heat exchange performance of the heat exchanger. When the first peripheral wall 11 is provided with the two protrusions 37, the two protrusions 37 are symmetrically arranged along the circumferential direction of the retainer 3, the dimension between the protrusions 37 is equal to the inner diameter of the first pipe 1, and the two protrusions 37 and a part of the first side wall surface 32 are connected with the inner wall surface 111 of the first peripheral wall 11, and the support stability of the retainer 3 is ensured by the three-part fixed connection, so that the phenomenon of the first piece 2 swinging or vibrating is reduced. Of course, three or more protrusions 37 may be provided, when three or more protrusions 37 are provided, the first side wall surface 32 may be stably supported in the first pipe 1 only by the connection of the protrusions 37 with the inner wall surface 111 of the first peripheral wall 11, and the number of the third hole passages 16 that may be formed between the first side wall surface 32 and the first peripheral wall 11 is one less than the number of the protrusions 37, that is, when N protrusions 37 are provided, N-1 third hole passages 16 may be formed between adjacent protrusions 37. The third hole passage 16 can increase the flow area of the refrigerant, and is helpful for adjusting the refrigerant distribution, thereby improving the heat exchange efficiency of the heat exchange assembly.

Alternatively, a part of the protrusion 37 protrudes from the first slot 15, and another part of the protrusion 37 is located inside the first tube 1, so that the first sidewall surface 32 and the inner wall surface 111 of the first peripheral wall 11 form a third slot 16 through which the refrigerant can flow.

In some embodiments, the first slot 15 can also be used to place the retaining element 3, and the retaining element 3 is placed in the first tube 1 through the first slot 15. compared to the above embodiments, the first slot 15 in this embodiment has a larger size, not only for the protrusion 37 to pass through, but also for the retaining element 3 to be inserted into the first tube 1 through the first slot 15. The boss 37 is capable of cooperating with the first slot 15 to restrict movement of the retainer 3 in the lengthwise direction of the first pipe 1. Similarly, the protrusion 37 may extend completely through the first slot 15, or may extend partially through the first slot 15 and partially within the first tube 1.

In some embodiments, as shown in fig. 13, the retainer 3 includes a second sidewall 33, the second sidewall 33 and the first sidewall are directly or indirectly connected, the retainer 3 further includes a first protrusion 34, the second sidewall 33 includes a portion of the first protrusion 34, and a portion of the first protrusion 34 is located within the second aperture 13.

In some embodiments, the second sidewall 33 is a wall that surrounds the first peripheral wall 11 to form the second duct 13, and includes a portion of the first protrusion 34, such that the first protrusion 34 is located within the second duct 13. Along the flowing direction of the refrigerant, the first convex part 34 can play a role of turbulent flow for the refrigerant flowing through the second pore channel 13, which is beneficial to adjusting the refrigerant distribution in the first pipe 1, thereby improving the heat exchange performance of the heat exchange assembly

In some embodiments, as shown in fig. 13, the retainer 3 includes a first recess 35 and the second sidewall 33 includes a portion of the first recess 35, the first recess 35 facing the second aperture 13.

In some embodiments, the second side wall 33 includes a portion of the first recess 35, so that the direction of the first hole 31 surrounding the second hole 13 is concave, and therefore, the first recess 35 can further increase the refrigerant flowing cross-sectional area of the second hole 13, reduce the resistance of the retainer 3 to the refrigerant flowing, increase the flowing speed of the refrigerant, and improve the heat exchange efficiency of the heat exchange assembly.

In some embodiments, as shown in fig. 14, in a longitudinal section parallel to the length direction L of the first tube 1 and including the axis of the first tube 1, a projection of at least a part of the first porthole 31 and a projection of a part of the first recess 35 coincide.

In some embodiments, as shown in fig. 13, the retaining member 3 includes two or more first recesses 35, the first recesses 35 are spaced apart from each other by the first protrusions 34, and the first protrusions 34 play a role of turbulence, which is not described herein again. The plurality of first concave portions 35 can increase the refrigerant flowing cross-sectional area of the second duct 13, reduce the resistance of the retainer 3 to the refrigerant, increase the flowing speed of the refrigerant, facilitate the adjustment of refrigerant distribution, and improve the heat exchange efficiency of the heat exchange assembly.

In some embodiments, as shown in fig. 13, the retainer 3 further includes two or more first through holes 36, the first through holes 36 having a hydraulic diameter smaller than that of the first orifice 31.

In some embodiments, the retainer 3 further includes a first through hole 36 in addition to the first hole 31, and the hydraulic diameter of the first through hole 36 is smaller than that of the first hole 31, so that the first member 2 is not mounted incorrectly, and the assembly accuracy and efficiency are improved. And the first through hole 36 can increase the area of the channel through which the refrigerant can flow in the holder 3, reduce the resistance of the holder 3 to the refrigerant, increase the flow speed of the refrigerant, facilitate the adjustment of the refrigerant distribution, and improve the heat exchange efficiency of the heat exchange assembly.

Here, the hydraulic diameter (hydraulic diameter) is four times the ratio of the flow cross-sectional area to the perimeter.

More specifically, as shown in fig. 11 to 14, a direction perpendicular to the length direction L of the first tube 1 is defined as a first direction, a maximum length dimension of the holder 3 projected in the first direction is D, and a hydraulic diameter of the first tube 1 is D in any cross section of the first tube 1, and the following relational expressions are satisfied: D/D < 0.7.

In some embodiments, the ratio of the maximum length D of the retaining element 3 projected in the first direction to the hydraulic diameter D of the first tube 1 is less than 0.7, which can ensure that the retaining element 3 does not completely fill the first cavity 12 after the retaining element 3 is installed in the first tube 1, so that the second side wall 33 and the first peripheral wall 11 of the retaining element 3 can enclose the second hole 13, increase the area of the channel for the refrigerant to flow through, and improve the heat exchange efficiency of the heat exchange assembly.

In some embodiments, the first through hole 36 and the first concave portion 35 and/or the first convex portion 34 may be present at the same time, which not only can increase the turbulent flow effect, but also can further increase the flow amount of the refrigerant, reduce the resistance of the retainer 3 to the refrigerant, increase the flow speed of the refrigerant, facilitate the adjustment of the refrigerant distribution, and improve the heat exchange efficiency of the heat exchange assembly.

Of course, the protrusion 37 may exist with one, two, or even three of the first protrusion 34, the first recess 35, the first through hole 36, which are not listed here.

The present application further provides a heat exchange system, the heat exchange system includes the above microchannel heat exchanger, as shown in fig. 1 and fig. 3, wherein the heat exchange assembly of the microchannel heat exchanger further includes: the heat exchange tube comprises a second tube 4, heat exchange tubes 5 and fins 51, wherein the first tube 1 and the second tube 4 are arranged at intervals, as shown in fig. 2, a plurality of heat exchange tubes 5 are arranged at intervals along the length direction L of the first tube 1, each heat exchange tube 5 comprises a plurality of channels extending along the length direction L, the channels are arranged at intervals along the width direction W of the heat exchange tube 5, the width direction W of each heat exchange tube 5 is the width direction W of the heat exchange assembly, the heat exchange tubes 5 are directly or indirectly connected with the first tube 1, and the heat exchange tubes 5 are directly or indirectly connected with the second tube 4; the fins 51 are connected to the heat exchange tubes 5, a part of the fins 51 is located between two adjacent heat exchange tubes 5 in the length direction L of the first tube 1, and the number of the fins 51 is plural.

In some embodiments, by providing the holder 3 inside the first pipe 1 and installing the first member 2 in the first pipe 1 through the first hole 31 of the holder 3, the holder 3 can play a role of fixing and supporting the first member 2, and reduce the vibration or oscillation of the first member 2 during operation, thereby reducing abnormal noise caused by the vibration or oscillation.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A microchannel heat exchanger comprising a heat exchange assembly, the heat exchange assembly comprising:

a first tube including a first peripheral wall and a first cavity, a wall enclosing the first cavity including the first peripheral wall, the first peripheral wall including an inner wall surface and an outer wall surface;

a first member, at least a portion of which is located within the first lumen and has a length in a direction of the length of the first tube;

a retainer, at least a portion of the retainer being located within the first cavity, the retainer including a first aperture extending therethrough, a portion of the first member being located within the first aperture, the retainer including a first sidewall, the first sidewall including a first sidewall surface, the first sidewall surface being connected to the first perimeter wall;

in any cross section of the first tube, a maximum projected length of the first side wall surface of the holder is L1, a maximum projected length of an inner wall surface of the first peripheral wall is L2, and 0.6< L1/L2< 0.9.

2. The microchannel heat exchanger of claim 1, wherein the first tube includes a first slot, the first slot extending through the first perimeter wall, a portion of the retainer being located within the first slot, the first tube including a second slot, a wall surrounding the second slot including the retainer and a portion of the first perimeter wall.

3. The microchannel heat exchanger of claim 2, wherein the retainer comprises a second sidewall, the second sidewall and the first sidewall being directly or indirectly connected, the retainer further comprising a first protrusion, the second sidewall comprising a portion of the first protrusion, a portion of the first protrusion being located within the second channel.

4. The microchannel heat exchanger of claim 3, wherein the retainer includes a first recess and the second sidewall includes a portion of the first recess, the first recess facing the second channel.

5. The microchannel heat exchanger of claim 4, wherein, in a longitudinal cross-section parallel to the first tube length direction and including the first tube axis, a projection of at least a portion of the first porthole and a projection of a portion of the first recess coincide.

6. The microchannel heat exchanger of claim 1 or 2, wherein the retainer further comprises one or more first through-holes having a hydraulic diameter smaller than a hydraulic diameter of the first porthole.

7. The microchannel heat exchanger of claim 1, wherein the retainer further comprises two or more bosses spaced circumferentially about the retainer, the retainer being connected to the first peripheral wall by the bosses.

8. The microchannel heat exchanger of claim 7, wherein the first tube includes a third bore passage, the third bore passage being located between two of the bosses in the retainer circumferential direction.

9. The microchannel heat exchanger of claim 1 or 2, wherein a direction perpendicular to a length direction of the first tube is defined as a first direction, a maximum length dimension of the holder as projected in the first direction is D, and a hydraulic diameter of the first tube is D, and the following relation is satisfied: D/D < 0.7.

10. A heat exchange system comprising the microchannel heat exchanger of any one of claims 1-9, the heat exchange assembly comprising:

a first tube and a second tube, the first tube and the second tube being spaced apart,

the heat exchange tubes are arranged at intervals along the length direction of the first tube and comprise a plurality of channels extending along the length direction of the heat exchange tubes, the channels are arranged at intervals along the width direction of the heat exchange tubes, the heat exchange tubes are directly or indirectly connected with the first tube, and the heat exchange tubes are directly or indirectly connected with the second tube;

the fins are connected with the heat exchange tubes, part of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube, and the number of the fins is multiple.

Images