CN107843031B

CN107843031B - Micro-channel heat exchanger

Info

Publication number: CN107843031B
Application number: CN201610831189.8A
Authority: CN
Inventors: 黄宁杰; 王艳红
Original assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Current assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Priority date: 2016-09-19
Filing date: 2016-09-19
Publication date: 2020-06-16
Anticipated expiration: 2036-09-19
Also published as: CN107843031A

Abstract

The invention discloses a micro-channel heat exchanger, comprising: first pressure manifold, second pressure manifold, flat pipe and drainage structures. The flat pipe is bent for many times to form a snake shape, two ends of the flat pipe are respectively connected with the first collecting pipe and the second collecting pipe, the flat pipe comprises a plurality of straight pipe sections parallel to each other and a bent pipe section connected between two adjacent straight pipe sections, and the drainage structure is arranged at the bent pipe section to discharge condensate water flowing to the bent pipe section. According to the micro-channel heat exchanger disclosed by the invention, the drainage structure is arranged at the bent pipe section of the flat pipe, so that condensed water accumulated at the bent pipe on the micro-channel heat exchanger can be quickly discharged, the wind resistance of the micro-channel heat exchanger can be reduced, and the heat exchange effect of the micro-channel heat exchanger can be improved.

Description

Micro-channel heat exchanger

Technical Field

The invention relates to the technical field of refrigeration, in particular to a micro-channel heat exchanger.

Background

In recent decades, the air conditioning industry has been developed rapidly, and the heat exchanger, as one of the main components of the air conditioner, needs to be improved and optimized according to the market requirements. The micro-channel heat exchanger has the characteristics of high refrigeration efficiency, small volume, light weight, strong pressure resistance and the like, and can well meet the market requirements. The micro-channel heat exchanger in the related art has the problem that condensed water is difficult to discharge when being used as an evaporator, and the condensed water cannot be discharged in time, so that wind resistance is increased, and the heat exchange effect is influenced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a micro-channel heat exchanger which has good drainage performance and heat exchange performance.

According to the embodiment of the invention, the micro-channel heat exchanger comprises: a first collecting pipe and a second collecting pipe; the flat pipe is bent for multiple times to form a snake shape, two ends of the flat pipe are respectively connected with the first collecting pipe and the second collecting pipe, and the flat pipe comprises a plurality of straight pipe sections which are parallel to each other and a bent pipe section connected between every two adjacent straight pipe sections; and the drainage structure is arranged at the bent pipe section to drain the condensed water flowing to the bent pipe section.

According to the micro-channel heat exchanger provided by the embodiment of the invention, the drainage structure is arranged at the bent pipe section of the flat pipe, so that condensed water accumulated at the bent pipe on the micro-channel heat exchanger can be quickly discharged, the wind resistance of the micro-channel heat exchanger can be reduced, and the heat exchange effect of the micro-channel heat exchanger can be improved.

According to some embodiments of the invention, the drainage structure comprises drainage fins provided in the bend section perpendicular to each other with respect to the straight section.

According to some embodiments of the present invention, the drain sheet is formed in an arc structure depressed toward a flow direction of the condensed water.

According to some embodiments of the invention, the drainage structure further comprises a guide piece connected to the drainage piece and extending obliquely outward.

According to some embodiments of the invention, the drainage structure comprises drainage fins arranged parallel to each other in the bend section with respect to the straight section, the drainage fins being arranged protruding out of the bend section.

According to some embodiments of the invention, the drainage structure comprises drainage fins provided in the bend section inclined to each other with respect to the straight section.

According to some embodiments of the invention, the edge of the drainage sheet contacting the pipe bend is provided with a stepped structure to fit the pipe bend.

According to some embodiments of the invention, the drainage sheet comprises two and both are obliquely arranged in the bend section relative to the straight section, and one end of the two drainage sheets is connected and the other end is far away from each other to form a V-shape.

Furthermore, the two drainage sheets extend out of the bent pipe section, one end, connected with each other, of each drainage sheet is provided with a groove, and the grooves are formed in the parts, extending out of the bent pipe section, of the two drainage sheets.

According to some embodiments of the invention, the drainage structure further comprises a connection piece which connects the drainage pieces provided in different elbow sections in sequence.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a microchannel heat exchanger according to an embodiment of the invention;

FIG. 2 is a perspective view of a partial structure of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure includes a drainage sheet and a guide sheet;

FIG. 3 is a perspective view of one example of the drainage structure of FIG. 2;

FIG. 4 is a perspective view of another example of the drainage structure of FIG. 2;

FIG. 5 is a perspective view of yet another example of the drainage structure of FIG. 2;

FIG. 6 is a perspective view of a partial structure of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure includes a drainage sheet, a guide sheet, and a connection sheet;

FIG. 7 is a perspective view of an example of the drainage structure of FIG. 6;

FIG. 8 is a perspective view of another example of the drainage structure of FIG. 6;

FIG. 9 is a perspective view of a portion of the construction of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structures include drainage fins and the drainage fins are disposed within the bend sections at an angle to one another relative to the straight sections;

FIG. 10 is a perspective view of the drainage structure of FIG. 9;

FIG. 11 is a perspective view of a partial structure of a microchannel heat exchanger according to an embodiment of the invention, in which the drainage structure includes drainage fins and connection pieces, and the drainage fins are provided in the bend section obliquely to each other with respect to the straight section;

FIG. 12 is a perspective view of the drainage structure of FIG. 11;

FIG. 13 is a perspective view of a portion of the construction of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure comprises two drainage fins and the drainage fins are disposed in the bend section at an angle to each other relative to the straight section;

FIG. 14 is a perspective view of the drainage structure of FIG. 13;

FIG. 15 is a perspective view of a portion of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure includes two drainage fins and a connecting piece, and the drainage fins are provided in the bend section at an angle to each other with respect to the straight section;

FIG. 16 is a perspective view of the drain structure of FIG. 15;

FIG. 17 is a perspective view of a portion of the construction of a microchannel heat exchanger according to an embodiment of the invention in which the drainage structures include drainage fins and the drainage fins are disposed within the bend section parallel to one another relative to the straight section;

FIG. 18 is a perspective view of the drain structure of FIG. 17;

FIG. 19 is a perspective view of a portion of the construction of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure includes drainage fins and connecting pieces, and the drainage fins are disposed in the bend section parallel to each other with respect to the straight section;

FIG. 20 is a perspective view of the drainage structure of FIG. 19;

FIG. 21 is a perspective view of a partial structure of a microchannel heat exchanger according to an embodiment of the invention, wherein the drainage structure includes a drainage sheet having a stepped structure and the drainage sheet is provided in a bend section in parallel with each other with respect to a straight section;

FIG. 22 is a perspective view of the drainage structure of FIG. 21;

FIG. 23 is a perspective view of a partial structure of a microchannel heat exchanger according to an embodiment of the invention, in which the drainage structure includes drainage fins and connecting pieces in a stepped configuration, and the drainage fins are provided in the bent pipe sections in parallel with each other with respect to the straight pipe sections;

fig. 24 is a perspective view of the drainage structure of fig. 23.

Reference numerals:

a micro-channel heat exchanger 100 having a plurality of micro-channels,

a first collecting pipe 1, a second collecting pipe 2, an avoiding space 3,

flat tubes 4, straight tube sections 41, bent tube sections 42, fins 5,

drainage structure 6, drainage piece 61, ladder structure 611, fluting 612, guide piece 62, connecting piece 63.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A microchannel heat exchanger 100 according to an embodiment of the invention is described below with reference to fig. 1-24.

As shown in fig. 1 to 24, a microchannel heat exchanger 100 according to an embodiment of the present invention includes: first pressure manifold 1, second pressure manifold 2, flat pipe 4 and drainage 6.

Specifically, flat pipe 4 bends for a plurality of times in order to form snakelike, and the both ends of flat pipe 4 link to each other with first pressure manifold 1 and second pressure manifold 2 respectively. From this, the refrigerant can follow first pressure manifold 1 and flow into flat pipe 4 in, the in-process that the refrigerant flows in flat pipe 4 with the outside air heat transfer, then flow out flat pipe 4 and flow out from second pressure manifold 2. Wherein, first pressure manifold 1 and second pressure manifold 2 can be established in same one side of flat pipe 4, for example first pressure manifold 1 and second pressure manifold 2 can be located flat pipe 4's right side, and one side of flat pipe 4 adjacent to first pressure manifold 1 and second pressure manifold 2 can be equipped with dodges the space 3, and first pressure manifold 1 and second pressure manifold 2 can hold and dodge in the space 3 this to can make microchannel heat exchanger 100's structure compacter, pleasing to the eye.

Further, the flat tube 4 includes a plurality of straight tube sections 41 parallel to each other and a bend section 42 connected between two adjacent straight tube sections 41, and each straight tube section 41 can extend in the up-down direction, so that the structure of the bent flat tube 4 is compact and beautiful, and smooth transition between two adjacent straight tube sections 41 can be realized. Alternatively, the bent tube section 42 may be circular arc-shaped. Fins 5 may be provided between adjacent straight tube sections 41, and the fins 5 may be corrugated or louvered to enhance the heat exchange efficiency of the microchannel heat exchanger 100 with the air side.

The drain structure 6 is provided at the elbow section 42 to drain the condensed water flowing to the elbow section 42. It can be understood that when the microchannel heat exchanger 100 is used as an evaporator, condensed water may be attached to the microchannel heat exchanger 100, thereby increasing wind resistance and reducing heat exchange efficiency. Through set up drainage structures 6 in the bend section 42 department of flat pipe 4, can in time, discharge fast the comdenstion water of gathering in bend section 42 department to can reduce the windage, improve heat exchange efficiency, improve the heat transfer effect.

For example, when each straight pipe section 41 in the flat pipe 4 extends in the up-down direction, the condensed water attached to the microchannel heat exchanger 100 may flow downward along the flat pipe 4 and gather at the bottom-located elbow section 42 of the flat pipe 4, and at this time, the drain structure 6 may be disposed at the bottom-located elbow section 42 of the flat pipe 4, so that the water accumulated at the bottom-located elbow section 42 may be timely and quickly discharged, and the heat exchange efficiency of the microchannel heat exchanger 100 may be improved.

According to the micro-channel heat exchanger 100 provided by the embodiment of the invention, the drainage structure 6 is arranged at the bent pipe section 42 of the flat pipe 4, so that condensed water accumulated at the bent pipe on the micro-channel heat exchanger 100 can be quickly discharged, the wind resistance of the micro-channel heat exchanger 100 can be reduced, and the heat exchange effect of the micro-channel heat exchanger 100 can be improved.

A microchannel heat exchanger 100 according to various embodiments of the present invention is described in detail below with reference to fig. 1-24. Like parts are given like reference numerals in the several embodiments described below.

In the first embodiment, the first step is,

referring to fig. 1 to 8, in the present embodiment, the microchannel heat exchanger 100 includes a first header 1, a second header 2, flat tubes 4, fins 5, and a drainage structure 6. Flat pipe 4 bends in order to form snakelike many times, and the both ends of flat pipe 4 link to each other with first pressure manifold 1 and second pressure manifold 2 respectively. First pressure manifold 1 and second pressure manifold 2 establish the right side at flat pipe 4, and one side of the first pressure manifold 1 of the neighbouring of flat pipe 4 and second pressure manifold 2 is equipped with dodges the space 3, and first pressure manifold 1 and second pressure manifold 2 hold and should dodge in the space 3. The flat tube 4 comprises straight tube sections 41 and bent tube sections 42, each straight tube section 41 extends in the up-down direction, the fins 5 are arranged between two adjacent straight tube sections 41, and the fins 5 extend in a corrugated shape. Through the arrangement, the micro-channel heat exchanger 100 is compact and attractive in structure. The drainage structure 6 is arranged at the bent pipe section 42 of the flat pipe 4 which is positioned at the bottom, so that condensed water accumulated at the bent pipe section 42 can be discharged timely and quickly, and accordingly wind resistance can be reduced, heat exchange efficiency can be improved, and heat exchange effect can be improved.

The drainage structure 6 includes a drainage sheet 61 and a guide sheet 62, the drainage sheet 61 is arranged in the elbow section 42 perpendicularly to the straight pipe section 41, the guide sheet 62 is connected with the drainage sheet 61 and extends obliquely outwards, and the guide sheet 62 extends outwards to the outside of the elbow section 42. Since the straight pipe section 41 extends vertically in the up-down direction at this time, the drain fins 61 may be horizontally provided in the bent pipe section 42. Thus, the condensed water at the elbow section 42 can flow outward along the drain pieces 61 and be quickly drained by the drainage action of the guide pieces 62. Alternatively, the drain tab 61 and the guide tab 62 may be integrally formed.

In one specific example of the present invention, referring to fig. 3, the drainage sheet 61 and the guide sheet 62 are both flat plate-shaped, so that the drainage structure 6 is simple and easy to machine.

In another specific example of the present invention, referring to fig. 4, the drain pieces 61 are formed in an arc-shaped structure recessed toward the flow direction of the condensed water, the shape of the drain pieces 61 is more matched with the shape at the bent pipe so that the drain structure 6 is stably provided at the bent pipe, and the guide pieces 62 are flat-plate-shaped. Specifically, the straight pipe section 41 extends vertically in the up-down direction, and the condensed water can flow down along the straight pipe section 41 to the bent pipe section 42 at the bottom, and at this time, the drainage sheet 61 can be formed into an arc structure recessed downward. Therefore, the condensed water at the elbow section 42 can be guided to the drainage sheet 61 better, and the condensed water can be drained quickly by the drainage function of the guide sheet 62.

In still another specific example of the present invention, referring to fig. 5, the drain pieces 61 are formed in an arc-shaped structure depressed toward the flow direction of the condensed water, the guide pieces 62 are in a depressed arc-shaped structure, and the depression direction is obliquely downward. Specifically, the straight pipe section 41 extends vertically in the up-down direction, the condensed water can flow down along the straight pipe section 41 to the bottom elbow section 42, and at this time, the drainage sheet 61 may be an arc shape recessed downward and the guide sheet 62 may be an arc shape recessed downward obliquely. Therefore, the condensed water at the elbow section 42 can be guided to the drainage sheet 61 better, and the condensed water can be drained quickly by the drainage function of the guide sheet 62.

Further, referring to fig. 6 to 8, the drainage structure 6 further includes a connection piece 63, and the connection piece 63 sequentially connects the drainage pieces 61 provided in different elbow sections 42. Therefore, the drainage structure 6 is convenient to form and install. For example, the connecting piece 63 may be connected to the windward end of the drainage sheet 61, and the connecting piece 63 may be connected to the leeward end of the drainage sheet 61. Alternatively, a suitable gap is provided between the connecting piece 63 and the flat tube 4, so that the connecting piece 63 can be prevented from obstructing the flow of the condensed water, and the condensed water can be discharged more smoothly. Alternatively, the drain tab 61, the guide tab 62, and the connection tab 63 may be integrally formed. Wherein the drain piece 61 and the guide piece 62 in the drain structure 6 may be any one of the above examples.

Of course, the drainage structure 6 in the present embodiment may also include only the drainage sheet 61. The drainage fins 61 are arranged in the elbow section 42 perpendicularly to each other with respect to the straight pipe section 41, and one end of the drainage fins 61 is located at the elbow section 42 and the other end thereof protrudes outward to the outside of the elbow section 42. Therefore, the condensed water at the elbow section 42 can be rapidly discharged by the flow guiding effect of the drainage sheet 61 arranged obliquely.

In the second embodiment, the first embodiment of the method,

the microchannel heat exchanger 100 in this embodiment is different from the first embodiment only in the structure of the drainage structure 6, and other structures are substantially the same as those in the first embodiment, and are not described again here.

Referring to fig. 9 to 12, in the present embodiment, the drainage structure 6 includes the drainage sheet 61, the drainage sheet 61 is formed in a flat plate shape, and the drainage sheets 61 are provided in the bend section 42 to be inclined to each other with respect to the straight pipe section 41. Specifically, the straight pipe section 41 extends vertically in the up-down direction, the condensed water can flow down along the straight pipe section 41 to the bent pipe section 42 at the bottom, at this time, the drainage sheet 61 is obliquely arranged at the bent pipe section 42 at the bottom of the flat pipe 4 in the up-down direction, one end of the drainage sheet 61 is located at the bent pipe section 42, and the other end of the drainage sheet extends out to the outside of the bent pipe section 42. Therefore, the condensed water at the elbow section 42 can be discharged more quickly by the flow guiding effect of the drainage sheet 61 arranged obliquely.

Optionally, the edge of the drain tab 61 contacting the elbow section 42 is provided with a stepped structure 611 to fit the edge of the elbow section 42. Specifically, the bottom edge of the drainage sheet 61 is provided with a stepped structure 611, and the stepped structure 611 is engaged with the outer edge of the bent tube 42, so that the drainage sheet 61 can be stably provided at the bent tube 42.

Further, referring to fig. 11 to 12, the drainage structure 6 further includes a connection piece 63, and the connection piece 63 sequentially connects the drainage pieces 61 provided in different elbow sections 42. Therefore, the drainage structure 6 is convenient to form and install. Alternatively, the drain piece 61 and the connection piece 63 may be integrally formed.

In the third embodiment, the first step is that,

the microchannel heat exchanger 100 in this embodiment is different from the second embodiment only in the structure of the drainage structure 6, and other structures are substantially the same as those in the second embodiment, and are not described again here.

Referring to fig. 13-16, in the present embodiment, the drainage structure 6 includes two drainage fins 61, and each drainage fin 61 is provided in the elbow section 42 to be inclined to each other with respect to the straight pipe section 41. Thereby, the drainage speed can be accelerated by providing two drainage sheets 61. The two drainage fins 61 extend out of the elbow section 42, one ends (referring to the lower ends of the drainage fins 61 in fig. 13 to 16) of the two drainage fins 61 are connected and the other ends (referring to the upper ends of the drainage fins 61 in fig. 13 to 16) are away from each other to form a V-shape, one ends of the two drainage fins 61 connected to each other are provided with a slot 612, the slot 612 penetrates through the bottoms of the two drainage fins 61 and the slot 612 is provided at the part of the drainage fins 61 extending out of the elbow section 42. Therefore, the condensed water at the elbow section 42 can be guided by the drainage sheet 61 and can be drained timely and quickly through the slot 612.

Further, referring to fig. 15 and 16, the drainage structure 6 further includes a connection piece 63, and the connection piece 63 sequentially connects the drainage pieces 61 provided in different elbow sections 42. Therefore, the drainage structure 6 is convenient to form and install.

In the fourth embodiment, the first step is that,

Referring to fig. 17 to 24, the drainage structure 6 includes drainage fins 61, the drainage fins 61 are formed in a flat plate shape, the drainage fins 61 are provided in the bent pipe section 42 in parallel with each other with respect to the straight pipe section 41, and the drainage fins 61 are provided to protrude out of the bent pipe section 42. Specifically, the straight pipe section 41 vertically extends in the up-down direction, the condensed water can flow down along the straight pipe section 41 to the bent pipe section 42 at the bottom, at this time, the drainage sheet 61 is vertically arranged at the bent pipe section 42 at the bottom of the flat pipe 4 in the up-down direction, one end of the drainage sheet 61 is located at the bent pipe section 42, and the other end of the drainage sheet extends out to the outside of the bent pipe section 42. Therefore, the condensed water at the elbow section 42 can be discharged more quickly by the flow guiding function of the drainage sheet 61 which is vertically arranged.

Alternatively, referring to fig. 21 and 22, the edge of the drain sheet 61 is provided with a stepped structure 611 to be fitted with the edge of the bent pipe section 42. Specifically, the bottom edge of the drainage sheet 61 is provided with a stepped structure 611, and the stepped structure 611 is engaged with the outer edge of the bent tube 42, so that the drainage sheet 61 can be stably provided at the bent tube 42.

Further, referring to fig. 11 to 12, the drainage structure 6 further includes a connection piece 63, and the connection piece 63 sequentially connects the drainage pieces 61 provided in different elbow sections 42. Therefore, the drainage structure 6 is convenient to form and install. For example, in the example of fig. 11 and 12, the connection piece 63 includes a plurality of pieces, each connection piece 63 connects adjacent two drainage sheets 61, one end of each connection piece 63 is connected to an upper end of one of the adjacent two drainage sheets 61 and the other end of each connection piece 63 is connected to a lower end of the other of the adjacent two drainage sheets 61. This makes it possible to stabilize the drainage structure 6.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A microchannel heat exchanger, comprising:

a first collecting pipe and a second collecting pipe;

the flat pipe is bent for multiple times to form a snake shape, two ends of the flat pipe are respectively connected with the first collecting pipe and the second collecting pipe, and the flat pipe comprises a plurality of straight pipe sections which are parallel to each other and a bent pipe section connected between every two adjacent straight pipe sections;

the drainage structure is arranged at the bent pipe section to discharge condensed water flowing to the bent pipe section, and comprises drainage sheets which are arranged in the bent pipe section in parallel relative to the straight pipe section, and the drainage sheets extend out of the bent pipe section.

2. The microchannel heat exchanger of claim 1, wherein the edge of the drainage sheet contacting the bend section is provided with a stepped structure to fit the bend section.

3. The microchannel heat exchanger according to claim 1, wherein the straight pipe section vertically extends in an up-down direction, the drainage sheet is vertically provided at the bent pipe section at the bottom of the flat pipe in the up-down direction, one end of the drainage sheet is located at the bent pipe section and the other end of the drainage sheet extends outward to the outside of the bent pipe section.

4. The microchannel heat exchanger of any one of claims 1-3, wherein the drainage structure further comprises a connection piece that connects the drainage pieces disposed in different bend sections in sequence.