阅读说明：本技术 微通道换热器扁管、微通道换热器以及换热设备 (Micro-channel heat exchanger flat tube, micro-channel heat exchanger and heat exchange equipment ) 是由 吴青昊 魏文建 于 2018-07-20 设计创作，主要内容包括：本发明提供了一种微通道换热器扁管、微通道换热器以及换热设备,该微通道换热器扁管包括：管体：多个流体通道,多个所述流体通道并排设置在所述管体内,所述管体内设置有混合腔,至少两个所述流体通道与所述混合腔连通。采用本发明提供的技术方案,解决了现有技术中的微通道换热器扁管的换热效果不好的技术问题。(The invention provides micro-channel heat exchanger flat tubes, a micro-channel heat exchanger and heat exchange equipment.)

1, kind of microchannel heat exchanger flat tube, its characterized in that includes:

a tube body (10):

the fluid mixing device comprises a plurality of fluid passages (20), wherein the fluid passages (20) are arranged in the tube body (10) side by side, a mixing cavity (30) is arranged in the tube body (10), and at least two fluid passages (20) are communicated with the mixing cavity (30).

2. A microchannel heat exchanger flat tube according to claim 1, characterised in that a plurality of the mixing chambers (30) are provided in the axial direction of the tube body (10).

3. A microchannel heat exchanger flat tube according to claim 1, characterised in that a plurality of the mixing chambers (30) are provided in a radial cross section of the tube body (10).

4. A microchannel heat exchanger flat tube according to claim 1, wherein the radial cross-sectional shape of the tube body (10) is of oval, circular and polygonal.

5. The microchannel heat exchanger flat tube according to claim 1, characterized in that a plurality of the fluid channels (20) are arranged parallel to one another.

6. The microchannel heat exchanger flat tube of claim 1, wherein the microchannel heat exchanger flat tube is an -cube shaped structure.

7. The microchannel heat exchanger flat tube according to claim 1, wherein the tube body (10) has an oval radial cross-sectional shape, and the plurality of flow channels (20) are symmetrically distributed around a center line of the tube body (10).

8. The microchannel heat exchanger flat tube according to claim 7, characterised in that the radial cross-sections of at least two of the fluid channels (20) differ in area.

A microchannel heat exchanger of the type , comprising:

the heat exchanger comprises a plurality of microchannel heat exchanger flat tubes, wherein the microchannel heat exchanger flat tubes are microchannel heat exchanger flat tubes in any one of 1 to 8, and the microchannel heat exchanger flat tubes are arranged in parallel at intervals;

each fin is connected with a plurality of flat tubes of the micro-channel heat exchanger, and the fins are arranged at intervals;

the micro-channel heat exchanger flat tubes are arranged between the two collecting pipes, and two ends of each micro-channel heat exchanger flat tube are communicated with the two collecting pipes respectively.

10, heat exchange device characterized in that it comprises the microchannel heat exchanger set forth in claim 9.

Technical Field

The invention relates to the technical field of heat exchange equipment, in particular to micro-channel heat exchanger flat tubes, a micro-channel heat exchanger and heat exchange equipment.

Background

At present, mutually independent and parallel channels are arranged in a tube body of a flat tube of a micro-channel heat exchanger, refrigerant in each channel does not generate mass transfer, and refrigerant flowing in each channel respectively exchanges heat with media outside the tube.

By adopting the micro-channel heat exchanger flat tube in the prior art, the heat exchange temperature difference between the refrigerant and the medium outside the tube is gradually reduced along the flowing direction of the medium outside the tube, namely the heat exchange performance of the flat tube channel close to the position where the medium outside the tube flows out from the surface of the flat tube is poor. So can make the heat transfer effect of the whole leeward side of flat pipe all the time than the heat transfer effect of windward side poor a lot, cause the leeward side of flat pipe and windward side's heat load unbalanced, be unfavorable for improving the heat transfer effect of the flat pipe of microchannel heat exchanger.

Therefore, if the refrigerant initially entering a certain channel is less, the heat exchange effect of the channel is poor, the corresponding improvement cannot be carried out, and the improvement on the heat exchange effect of the flat tube of the micro-channel heat exchanger is not facilitated.

Disclosure of Invention

The invention provides micro-channel heat exchanger flat tubes, a micro-channel heat exchanger and heat exchange equipment, which aim to solve the problem that the heat exchange effect of the micro-channel heat exchanger flat tubes in the prior art is poor.

According to aspects of the invention, the micro-channel heat exchanger flat tube comprises a tube body and a plurality of fluid channels, wherein the fluid channels are arranged in the tube body side by side, a mixing cavity is arranged in the tube body, and at least two fluid channels are communicated with the mixing cavity.

, a plurality of mixing chambers are provided along the axial direction of the tube.

, a plurality of mixing chambers are provided in the radial cross-section of the tube.

, the tube has a radial cross-sectional shape of selected from the group consisting of oval, circle and polygon.

, the plurality of fluid passageways are arranged in parallel with one another.

, the flat tube of the micro-channel heat exchanger is body forming structure.

, the tube has an oval cross-sectional radial shape and the plurality of fluid passageways are symmetrically disposed about the centerline of the tube.

, the radial cross-sectional areas of the at least two fluid passageways are different.

According to another aspect of the invention, the microchannel heat exchanger comprises a plurality of microchannel heat exchanger flat tubes, a plurality of fins and two vertically arranged collecting pipes, wherein the microchannel heat exchanger flat tubes are the microchannel heat exchanger flat tubes provided by the invention and are arranged in parallel at intervals, each fin is connected with the microchannel heat exchanger flat tubes and is arranged at intervals, the microchannel heat exchanger flat tubes are arranged between the two collecting pipes, and two ends of each microchannel heat exchanger flat tube are respectively communicated with the two collecting pipes.

According to another aspect of the invention, there is provided heat exchange devices including the microchannel heat exchanger provided above.

By applying the technical scheme of the invention, the flat tube of the micro-channel heat exchanger comprises: a tube body and a plurality of fluid passageways. Wherein, a plurality of fluid passage set up in the body side by side, are provided with the hybrid chamber in the body, and two at least fluid passage and hybrid chamber intercommunication. Use this microchannel heat exchanger flat pipe, because be provided with the hybrid chamber with two fluid passage intercommunications at least in the body, like this, the heat transfer medium in the fluid passage of intercommunication can mix in this hybrid chamber, and the heat transfer medium after this hybrid chamber mixes will be redistributed to each fluid passage of intercommunication that is located the hybrid chamber low reaches in to the distribution of the heat transfer medium that makes each fluid passage that is located the hybrid chamber low reaches more even, thereby can improve the heat transfer effect. Therefore, the micro-channel heat exchanger flat tube provided by the invention can solve the problem of poor heat exchange effect of the micro-channel heat exchanger flat tube in the prior art.

Drawings

The accompanying drawings, which form a part hereof , are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention.

Fig. 1 shows a schematic structural diagram of a flat tube of a microchannel heat exchanger provided according to an embodiment of the present invention;

fig. 2 is a front view of a microchannel heat exchanger flat tube provided according to an embodiment of the invention;

fig. 3 shows a top view of a microchannel heat exchanger flat tube provided in accordance with an embodiment of the present invention;

fig. 4 shows a left side view of a microchannel heat exchanger flat tube provided in accordance with an embodiment of the present invention;

fig. 5 is a schematic structural diagram illustrating a microchannel heat exchanger flat tube with an oval cross-sectional shape provided in accordance with an embodiment of the present invention;

fig. 6 is a front view of a microchannel heat exchanger flat tube with an oval cross-sectional shape provided according to an embodiment of the invention;

fig. 7 is a left side view of a microchannel heat exchanger flat tube with an oval cross-sectional shape provided according to an embodiment of the invention;

fig. 8 is a front view of a microchannel heat exchanger flat tube with corrugated side walls according to an embodiment of the invention;

fig. 9 is a schematic structural diagram of a microchannel heat exchanger flat tube with a corrugated side wall according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a pipe body; 20. a fluid channel; 30. a mixing chamber.

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 apparent that the described embodiments are only some embodiments of the of the present invention, rather than all embodiments.

As shown in fig. 1 to 7, an embodiment of the present invention provides kinds of flat tubes of a microchannel heat exchanger, which includes a tube body 10 and a plurality of fluid passages 20, wherein the plurality of fluid passages 20 are arranged side by side in the tube body 10, a mixing chamber 30 is arranged in the tube body 10, and at least two fluid passages 20 are communicated with the mixing chamber 30.

By using the micro-channel heat exchanger flat tube, a mixing cavity 30 communicated with at least two fluid channels 20 is arranged in the tube body 10 of the flat tube, so that heat exchange media in the communicated fluid channels 20 can be mixed in the mixing cavity 30. The heat exchange medium mixed by the mixing chamber 30 is redistributed to the communicated fluid passages 20 located downstream of the mixing chamber 30, so that the distribution of the heat exchange medium in the fluid passages 20 located downstream of the mixing chamber 30 is more uniform, and the heat exchange effect in the fluid passages 20 located downstream of the mixing chamber 30 can be improved. Therefore, the micro-channel heat exchanger flat tube provided by the invention can solve the problem of poor heat exchange effect of the micro-channel heat exchanger flat tube in the prior art.

Meanwhile, when the mixed heat exchange media enter the fluid channels 20 which are positioned at the downstream of the mixing cavity 30 and communicated with each other, impact is formed at the inlet of the fluid channel 20 at the downstream, so that the sufficient mixing and heat exchange of the heat exchange media are facilitated, and the heat exchange effect is further improved .

In this embodiment, or more communication holes may be formed on the side walls of the adjacent fluid channels 20 to form the mixing chamber 30. to further improve the uniformity of the heat exchange medium in the fluid channels 20, a plurality of mixing chambers 30 may be provided in the axial direction of the tube body 10. with this arrangement, when the microchannel heat exchanger flat tube is used, the mixing chambers 30 communicate different fluid channels 20, so that the heat exchange medium in the tube body 10 can be mixed and redistributed for a plurality of times, so that the heat exchange medium in the fluid channels 20 in the tube body 10 is distributed more uniformly, thereby improving the overall heat exchange effect.

In order to further improve the heat exchange effect, a plurality of mixing chambers 30 may be further disposed on the radial cross section of the tube body 10, which is beneficial to the circulation and exchange of heat exchange media in different fluid channels 20 that are communicated with each other, so as to redistribute the heat exchange media in the fluid channels 20, so as to improve the distribution uniformity of the heat exchange media in the plurality of fluid channels 20, and thus, is beneficial to further improve the heat exchange effect of the flat tubes of the microchannel heat exchanger.

The mixing chamber 30 may be disposed at different positions of the fluid passage 20 according to actual requirements, and particularly, the mixing chamber 30 may be disposed at the middle or end of the fluid passage 20.

Specifically, the radial cross-sectional shape of the tube body 10 is of oval, round and polygonal, in actual production and manufacturing, a worker can select the corresponding radial cross-sectional shape of the tube body 10 according to actual needs, and the microchannel heat exchanger flat tube with the oval cross-sectional shape is shown in fig. 5 to 7.

In the present embodiment, a plurality of fluid passages 20 are arranged in parallel with each other. With this arrangement, the heat exchange medium flows in the plurality of fluid passages 20 arranged in parallel with each other to perform heat exchange sufficiently.

In the present embodiment, the flat tube of the microchannel heat exchanger has an -shaped structure, and in particular, the mixing chamber 30 and the fluid channel 20 in the present embodiment are both made by continuously extruding a metal flow in a specific mold, which facilitates the production and manufacture and also contributes to the stability of the overall structure.

Specifically, the radial cross-sectional shape of the tube 10 is oval, and the plurality of fluid channels 20 are symmetrically distributed around the center line of the tube 10. as shown in fig. 8 and 9, the sidewall in this embodiment is a plate-shaped structure, and the position and shape of the corresponding plate-shaped structure are set according to actual manufacturing and process requirements.A planar structure can be used as the plate-shaped structure, and in order to further increase the heat exchange effect at step , the sidewall can be set to be a plate-shaped structure with corrugations, which can enhance the disturbance of the fluid in the fluid channels 20 and enhance the heat exchange effect.

Specifically, the areas of the radial cross-sections of at least two of the fluid passages 20 are different.

The second embodiment of the invention provides microchannel heat exchangers, which comprise a plurality of microchannel heat exchanger flat tubes, a plurality of fins and two vertically arranged collecting pipes, wherein the microchannel heat exchanger flat tubes are the microchannel heat exchanger flat tubes provided in the second embodiment , the plurality of microchannel heat exchanger flat tubes are arranged at intervals in parallel, each fin is connected with the plurality of microchannel heat exchanger flat tubes, the plurality of fins are arranged at intervals, the plurality of microchannel heat exchanger flat tubes are arranged between the two collecting pipes, and two ends of each microchannel heat exchanger flat tube are respectively communicated with the two collecting pipes.

For the evaporator, if the flat tube in the prior art is adopted, the distribution of the condensation on the surface of the flat tube is uneven because the flow distribution of the refrigerant of each channel in the flat tube is uneven, and after the flat tube of the microchannel heat exchanger provided by the embodiment is adopted, the uniformity of the distribution of the condensation can be improved, the discharge of the condensation water is facilitated, the frosting is delayed, the problem that the windward side of the flat tube is frosted too fast to cause the defrosting mode to be entered in advance is avoided, and the defrosting period is prolonged.

With this arrangement, using the microchannel heat exchanger provided in this embodiment, the heat exchange medium is distributed from headers into the plurality of flat microchannel heat exchanger tubes and exchanges heat within the plurality of flat microchannel heat exchanger tubes, when the heat exchange medium enters the mixing chamber 30 within the flat microchannel heat exchanger tubes, the heat exchange medium will be mixed and redistributed within the mixing chamber 30 to promote uniformity of the heat exchange medium within the plurality of fluid channels 20 communicating downstream of the mixing chamber 30 to enhance the heat exchange effect of the plurality of fluid channels 20 communicating downstream of the mixing chamber 30.

The third embodiment of the invention provides heat exchange devices, which comprise the microchannel heat exchanger in the second embodiment.

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 components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically indicated, it is to be understood that the dimensions of the various parts illustrated in the drawings are not to be drawn to scale as actual, techniques, methods, and apparatus known to those of ordinary skill in the relevant art are not to be discussed in detail, but are to be considered part of the warranty description, where appropriate.

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.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over" and the like may be used herein to describe the spatially positional relationship of devices or features to other devices or features as illustrated in the figures.

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

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.