CN112762731A

CN112762731A - Flat pipe, micro-channel heat exchanger and air conditioner

Info

Publication number: CN112762731A
Application number: CN201911001998.6A
Authority: CN
Inventors: 魏文建; 马文勇; 梁新宇
Original assignee: Zhejiang Dunan Thermal Technology Co Ltd
Current assignee: Zhejiang Dunan Thermal Technology Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2021-05-07
Also published as: JP7357773B2; JP2022552079A; WO2021077895A1

Abstract

The invention provides a flat tube, a micro-channel heat exchanger and an air conditioner, wherein the flat tube comprises two thin plates, the two thin plates are welded to form the flat tube, the flat tube comprises a straight section and a transition section which are connected with each other, the straight section and the transition section are positioned on the same plane, an included angle is formed between the straight section and the transition section in the plane direction of the flat tube, and the straight section and the transition section are formed by stamping. Through the technical scheme that this application provided, can solve the problem that microchannel heat exchanger among the prior art can't satisfy user demand.

Description

Flat pipe, micro-channel heat exchanger and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a flat pipe, a micro-channel heat exchanger and an air conditioner.

Background

Currently, a split type air conditioner includes an indoor unit and an outdoor unit. The indoor unit heat exchanger adopts a finned tube heat exchanger for heat exchange. Because the microchannel heat exchanger has the advantages of high heat exchange efficiency and low refrigerant filling amount, the microchannel heat exchanger has replaced a finned tube heat exchanger and has achieved great success in the field of commercial air conditioners, and therefore, the development of the microchannel heat exchanger to replace the finned tube heat exchanger of a household air conditioner is very necessary.

However, in the prior art, because the installation space of the heat exchanger of the indoor unit of the split air conditioner is very limited and limited by factors such as the installation space and the structure, the microchannel heat exchanger needs to be bent for many times, so that the microchannel heat exchanger is bent and cracked and cannot be normally used. Therefore, the problem that the micro-channel heat exchanger cannot meet the use requirement exists in the prior art.

Disclosure of Invention

The invention provides a flat pipe, a micro-channel heat exchanger and an air conditioner, and aims to solve the problem that the micro-channel heat exchanger in the prior art cannot meet the use requirement.

According to one aspect of the invention, the flat pipe comprises two thin plates, the two thin plates are welded to form the flat pipe, the flat pipe comprises a straight section and a transition section which are connected with each other, the straight section and the transition section are located on the same plane, an included angle is formed between the straight section and the transition section in the plane direction of the flat pipe, and the straight section and the transition section are formed by stamping.

Further, flat pipe has a plurality of straight sections, and the changeover portion setting is between two adjacent straight sections, and the lateral wall of changeover portion is curved structure along the extending direction.

Furthermore, the flat pipe is provided with a first flat section, a first transition section, a second flat section, a second transition section and a third flat section which are connected in sequence, an included angle is formed between the first flat section and the second flat section, an included angle is formed between the second flat section and the third flat section, and the free end of the first flat section and the free end of the third flat section are positioned on the same side of the second flat section.

Furthermore, the included angle between the first straight section and the second straight section is a, the a is more than or equal to 75 degrees and less than or equal to 105 degrees, the included angle between the second straight section and the third straight section is b, and the b is more than or equal to 85 degrees and less than or equal to 135 degrees.

Further, be provided with a plurality of connection convex parts on the sheet metal, two sheet metals are connected in order to form flat pipe through connecting the convex part, and flat pipe is used for enclosing the outside of establishing at the fan, and flat pipe has the inboard and the outside of relative setting, and the inboard of flat pipe is close to the fan setting, and the size of the connection convex part on at least part changeover portion is crescent to the outside of flat pipe by the inboard of flat pipe.

Further, in the length direction of the transition section, the transition section is provided with a plurality of rows of connecting convex parts, the size of at least one row of connecting convex parts is kept unchanged, and the size of at least one row of connecting convex parts is gradually increased from the inner side of the flat pipe to the outer side of the flat pipe.

Furthermore, in the direction parallel to the flat tube plane, at least part of the connecting convex part is in a long strip shape.

According to another aspect of the present invention, there is provided a microchannel heat exchanger, comprising: the flat tubes are arranged side by side and are provided for the above; the collecting components are arranged at two ends of the flat tubes, and the flat tubes are communicated with the collecting components; fins are arranged on both sides of the flat tubes, and the shape of the fins is the same as that of the flat tubes; and the side plates are arranged on two sides of the micro-channel heat exchanger, and the side plates and the flat pipes are the same in shape.

Further, the current collecting assembly includes: the collecting pipe is provided with a plurality of distribution ports, the distribution ports and the flat pipes are arranged in a one-to-one correspondence mode, and the flat pipes are communicated with the collecting pipe through the distribution ports; the end cover is arranged at the end part of the collecting pipe; the inlet pipe penetrates through the end cover and is communicated with one collecting pipe; and the outlet pipe is arranged on the end cover in a penetrating manner and is communicated with the other collecting pipe.

According to still another aspect of the present invention, there is provided an air conditioner including the microchannel heat exchanger provided above.

By applying the technical scheme of the invention, the flat pipe comprises two thin plates, and the two thin plates are welded to form the flat pipe. The flat pipe comprises a straight section and a transition section which are connected with each other, and the straight section and the transition section are located on the same plane. Specifically, in the plane direction of the flat pipe, an included angle is formed between the straight section and the transition section, and the straight section and the transition section are formed through stamping. By adopting the structure, because the included angle is formed between the straight section and the transition section, the volume of the flat pipe can be reduced, and then the size of the micro-channel heat exchanger can be reduced, and the micro-channel heat exchanger can be smoothly installed in the air conditioner. And, because straight section and changeover portion punching press form, need not to bend the flat pipe, both be convenient for process the flat pipe, the flat pipe can not take place the fracture again.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a flat tube provided according to an embodiment of the present invention;

FIG. 2 shows a partial enlarged view at A in FIG. 1;

FIG. 3 shows a partial enlarged view at B in FIG. 1;

FIG. 4 shows a cross-sectional view at C-C in FIG. 1;

fig. 5 is a further schematic structural diagram of a flat tube provided in an embodiment of the present invention;

FIG. 6 illustrates an exploded view of a microchannel heat exchanger provided in accordance with an embodiment of the present invention;

FIG. 7 illustrates yet another exploded view of a microchannel heat exchanger provided in accordance with an embodiment of the present invention;

FIG. 8 illustrates an assembly view of a microchannel heat exchanger provided in accordance with an embodiment of the present invention;

fig. 9 illustrates a schematic structural diagram of an air conditioner provided according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a thin plate; 11. a first straight section; 12. a first transition section; 13. a second straight section; 14. a second transition section; 15. a third straight section; 16. a connecting projection;

20. flat tubes;

30. a current collection assembly; 31. a header pipe; 311. a dispensing opening; 32. an end cap; 33. feeding a pipe; 34. discharging a pipe;

40. a fin; 50. a side plate; 60. a water pan; 70. a fan; 80. a microchannel heat exchanger;

a. an included angle between the first straight section and the second straight section;

b. and the included angle between the second straight section and the third straight section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 invention.

As shown in fig. 1 to 5, an embodiment of the present invention provides a flat tube, which includes two thin plates 10, and the two thin plates 10 may be welded to form a flat tube. Wherein, flat pipe includes interconnect's straight section and changeover portion, and straight section is located the coplanar with the changeover portion, so be convenient for assemble flat pipe and other parts, and the straight section and the changeover portion of flat pipe all can laminate mutually or keep certain interval with other parts. In this embodiment, on the plane direction of flat pipe, contained angle has between straight section and the changeover portion, so be convenient for reduce the size of flat pipe, and straight section and changeover portion punching press form, need not to bend flat pipe, can guarantee the structural strength of flat pipe. Wherein, flat pipe can include a plurality of straight sections and changeover portion, can set up quantity, size and the straight section of straight section and changeover portion and the angle between the changeover portion according to actual demand.

The flat pipe that this embodiment of application provided has the contained angle through making between straight section and the changeover portion, can reduce the volume of flat pipe to can reduce microchannel heat exchanger's size, and then can install microchannel heat exchanger inside the air conditioner smoothly. Because straight section and changeover portion punching press form, need not to bend flat pipe, both be convenient for process flat pipe, flat pipe can not take place the fracture again, can promote the structural strength of flat pipe. Moreover, the flat pipe is formed by welding the two sheets 10 after being stamped, so that the flat pipe has the advantage of convenience in processing, and the practicability of the flat pipe can be improved by processing the flat pipe into various shapes.

In this embodiment, the course of working of flat pipe includes: according to the use requirement and the installation requirement, the thin plate 10 is punched, the length and the angle of the straight section and the transition section are controlled, the thin plate 10 is punched into a preset shape and a preset size, and then the punched thin plate 10 is welded to form the flat pipe.

In the prior art, the installation space of the split air conditioner indoor unit heat exchanger is very limited, and actually, the size of the core body of the heat exchanger does not exceed 300mm generally. Wherein, the finned tube heat exchanger is limited by factors such as installation space, structure and the like and adopts a multi-block combination form. Adopt the flat pipe that this embodiment provided, need not to bend and the piecemeal to flat pipe, be convenient for assemble.

Wherein, the lateral wall of changeover portion can be linear structure along extending direction, also can be curved structure, can set up the lateral wall structure of changeover portion as required. In this embodiment, flat pipe has a plurality of straight sections, and the changeover portion setting is between two adjacent straight sections. In order to facilitate the assembly of the flat pipe, a plurality of straight sections are all located the same side of the transition section, so that the volume of the flat pipe can be further reduced. Specifically, the lateral wall of changeover portion is curved structure along the extending direction, so be convenient for assemble flat pipe, and flat pipe can not cause the interference with other parts.

In this embodiment, the flat tube has a first straight section 11, a first transition section 12, a second straight section 13, a second transition section 14, and a third straight section 15 connected in sequence, an included angle is formed between the first straight section 11 and the second straight section 13, an included angle is formed between the second straight section 13 and the third straight section 15, and a free end of the first straight section 11 and a free end of the third straight section 15 are located on the same side of the second straight section 13. With the above structure, the first straight section 11, the first transition section 12, the second straight section 13, the second transition section 14, and the third straight section 15 can form a hook-like structure for easy assembly. In other embodiments, the number of straight sections and transition sections is increased or decreased.

In order to facilitate assembly, an included angle between the first straight section 11 and the second straight section 13 is a, wherein a is more than or equal to 75 degrees and is less than or equal to 105 degrees, an included angle between the second straight section 13 and the third straight section 15 is b, and b is more than or equal to 85 degrees and is less than or equal to 135 degrees. With contained angle a and contained angle b setting in above-mentioned within range, can make flat pipe and the microchannel heat exchanger assembly that flat pipe formed to the installation space of air conditioner in. Specifically, the included angle a and the included angle b may be set in combination with a specific structure and size of the air conditioner installation space. Wherein, the included angle a can be 80 °, 85 °, 90 °, 95 ° and 100 °, and the included angle b can be 90 °, 95 °, 100 °, 105 °, 110 °, 115 °, 120 °, 125 ° and 130 °.

Specifically, the thin plates 10 are provided with a plurality of connecting protrusions 16, and two thin plates 10 are connected by the connecting protrusions 16 to form a flat tube. When the two thin plates 10 are welded, the corresponding two connecting protrusions 16 are welded, which facilitates the welding. The plurality of connection projections 16 are provided at intervals, and the medium can flow through the intervals of the plurality of connection projections 16. Wherein, flat pipe is used for enclosing the outside of establishing at the fan, and flat pipe has the inboard and the outside of relative setting, and the inboard of flat pipe is close to the fan setting, and a plurality of straight sections all extend towards the inboard in flat pipe. In order to increase the connection strength, the size of the connecting projection 16 on part of the transition section is gradually increased from the inner side of the flat tube to the outer side of the flat tube. Because the outside atress of flat pipe is great, when welding sheet 10, through making the size of the connection convex part 16 in the flat pipe outside great, can guarantee the holistic structural strength of flat pipe.

In this embodiment, in the length direction of changeover portion, the changeover portion is provided with multiseriate connection convex part 16, and at least one is listed as the size of connecting convex part 16 and keeps unchangeable, and at least one is listed as the size of connecting convex part 16 and is increased gradually to the outside of flat pipe by the inboard of flat pipe, so when guaranteeing flat pipe connection intensity, can guarantee the circulation space of medium. Specifically, in the transition section, the size of one of the two adjacent rows of connecting protrusions 16 is kept constant, and the size of the other row of connecting protrusions 16 is gradually increased from the inner side of the flat tube to the outer side of the flat tube.

In the present embodiment, at least a part of the connecting projections 16 has a long sectional shape in a direction parallel to the flat tube plane. Furthermore, the extending direction of the connecting protrusion 16 extends along the length direction of the transition section, so that the connecting protrusion 16 with increased size does not affect the circulation of the medium while ensuring the connecting strength. Specifically, in the transition section, the size of one row of the connecting protrusions 16 in two adjacent rows of the connecting protrusions 16 is kept constant, the cross-sectional shape of the row of the connecting protrusions 16 is circular, the size of the other row of the connecting protrusions 16 is gradually increased from the inner side of the flat tube to the outer side of the flat tube, and the cross-sectional shape of the row of the connecting protrusions 16 is elongated.

As shown in fig. 6 to 8, still another embodiment of the present invention provides a microchannel heat exchanger including a plurality of flat tubes 20, a current collecting assembly 30, fins 40, and side plates 50. Wherein, a plurality of flat pipes 20 set up side by side, and this flat pipe 20 is the flat pipe that the aforesaid provided, so can reduce the volume of microchannel heat exchanger to can use the microchannel heat exchanger in the less air conditioner of installation space. Wherein, collecting assembly 30 sets up the both ends at flat pipe 20, and a plurality of flat pipe 20 all communicate with collecting assembly 30, and the both sides of flat pipe 20 all are provided with fin 40, and the shape of fin 40 is the same with flat pipe 20's shape, and sideboard 50 sets up the both sides at the microchannel heat exchanger, and sideboard 50 is the same with flat pipe 20's shape. In particular, the microchannel heat exchanger comprises an all-aluminum microchannel heat exchanger.

Specifically, collecting pipe assembly 30 includes two collecting pipes 31, end cover 32, advances pipe 33 and exit tube 34, all is provided with a plurality of distribution openings 311 on every collecting pipe 31, and a plurality of distribution openings 311 and a plurality of flat pipe 20 one-to-one set up, and flat pipe 20 communicates with collecting pipe 31 through distribution opening 311. The end cover 32 is arranged at the end of the collecting pipe 31, the inlet pipe 33 and the outlet pipe 34 are both arranged on the end cover 32 in a penetrating mode, the inlet pipe 33 is communicated with one collecting pipe 31, the outlet pipe 34 is communicated with the other collecting pipe 31, a medium can enter the collecting pipe 31 through the inlet pipe 33, and after heat exchange of the flat pipe 20, the medium can flow out of the outlet pipe 34 through the other collecting pipe 31.

Wherein, still be provided with the water collector 60 at the both ends of microchannel heat exchanger, can utilize water collector 60 to collect the comdenstion water, avoid the comdenstion water to cause the destruction to other parts. Specifically, the microchannel heat exchanger is arranged around the periphery of the fan 70, so that the heat exchange efficiency can be improved.

As shown in fig. 9, another embodiment of the present invention provides an air conditioner including the micro channel heat exchanger 80 provided as described above. Through using this microchannel heat exchanger can promote heat exchange efficiency, be convenient for assemble. Wherein, the air conditioner comprises a split type wall-mounted air conditioner.

The device provided by the embodiment has the following beneficial effects:

(1) the thin plate of the micro-channel heat exchanger is integrally stamped and is formed into a hook shape (non-bending operation) in one step, the core of the micro-channel heat exchanger does not need to be bent, the problem that the conventional micro-channel heat exchanger is bent for multiple times in a small size range is solved, and the reliability of a product can be obviously improved;

(2) the core body of the micro-channel heat exchanger is designed into a hook shape, has the advantage of compact structure, is convenient to match with the installation space, and can save space. When the device is installed, the collecting pipe 31 is horizontal, the flat pipe 20 is vertical, condensed water can flow into the water pan 60 along the wall of the flat pipe to be discharged, and the drainage capability is stronger;

(3) compared with a copper pipe aluminum fin heat exchanger, the heat exchanger provided by the embodiment has the general advantages of an all-aluminum micro-channel heat exchanger, and has the advantages of high heat exchange efficiency, low refrigerant charge, low cost, easiness in recovery and the like;

(4) compare in conventional microchannel heat exchanger, the flat pipe of the microchannel heat exchanger that this embodiment provided adopts the compound aluminium foil punching press of strong corrosion resistant multilayer to form, and the porous flat pipe corrosion resistance ability of extruding is stronger than heat.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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

Claims

1. The utility model provides a flat pipe, its characterized in that, flat pipe includes two sheets (10), two sheet (10) welding forms flat pipe, flat pipe includes interconnect's straight section and changeover portion, straight section with the changeover portion is located the coplanar on the plane direction of flat pipe, straight section with the contained angle has between the changeover portion, just straight section with the changeover portion punching press forms.

2. The flat tube according to claim 1, wherein the flat tube has a plurality of the straight sections, the transition section is disposed between two adjacent straight sections, and a side wall of the transition section has a curved structure along an extending direction.

3. Flat tube according to claim 1, characterised in that it has a first straight section (11), a first transition section (12), a second straight section (13), a second transition section (14) and a third straight section (15) connected in series, the first straight section (11) and the second straight section (13) having an angle therebetween, the second straight section (13) and the third straight section (15) having an angle therebetween, and the free end of the first straight section (11) and the free end of the third straight section (15) being located on the same side of the second straight section (13).

4. Flat tube according to claim 3, characterised in that the angle between the first straight section (11) and the second straight section (13) is a and 75 ° ≦ a ≦ 105 °, and the angle between the second straight section (13) and the third straight section (15) is b and 85 ° ≦ b ≦ 135 °.

5. Flat tube according to claim 1, characterised in that a plurality of connecting protrusions (16) are provided on the thin sheets (10), two thin sheets (10) are connected by the connecting protrusions (16) to form the flat tube, the flat tube is used for enclosing the outside of a fan, the flat tube has an inner side and an outer side which are oppositely arranged, the inner side of the flat tube is arranged close to the fan, and the size of the connecting protrusions (16) on at least part of the transition section is gradually increased from the inner side of the flat tube to the outer side of the flat tube.

6. Flat tube according to claim 5, characterised in that the transition is provided with a plurality of rows of said connecting projections (16) in the longitudinal direction of the transition, the dimensions of at least one row of said connecting projections (16) remaining constant, the dimensions of at least one row of said connecting projections (16) increasing from the inner side of the flat tube to the outer side of the flat tube.

7. Flat tube according to claim 5, characterised in that at least some of the connecting projections (16) have an elongated cross-sectional shape in a direction parallel to the plane of the flat tube.

8. A microchannel heat exchanger, comprising:

a plurality of flat tubes (20), the plurality of flat tubes (20) being arranged side by side, the flat tubes (20) being the flat tubes according to any one of claims 1 to 7;

the collecting assembly (30) is arranged at two ends of the flat pipes (20), and the flat pipes (20) are communicated with the collecting assembly (30);

the fins (40) are arranged on two sides of the flat pipe (20), and the shape of each fin (40) is the same as that of the flat pipe (20);

the side plates (50) are arranged on two sides of the micro-channel heat exchanger, and the side plates (50) are the same as the flat tubes (20) in shape.

9. The microchannel heat exchanger of claim 8, wherein the current collection assembly (30) comprises:

the collecting pipe (31) is provided with a plurality of distribution openings (311), the distribution openings (311) and the flat pipes (20) are arranged in a one-to-one correspondence manner, and the flat pipes (20) are communicated with the collecting pipe (31) through the distribution openings (311);

an end cover (32) arranged at the end part of the collecting pipe (31);

the inlet pipe (33) penetrates through the end cover (32), and the inlet pipe (33) is communicated with one collecting pipe (31);

and the outlet pipe (34) is arranged on the end cover (32) in a penetrating manner, and the outlet pipe (34) is communicated with the other collecting pipe (31).

10. An air conditioner, characterized in that it comprises a microchannel heat exchanger (80) according to claim 8.