WO2023208129A1

WO2023208129A1 - Microchannel heat exchanger group and air conditioning system having same

Info

Publication number: WO2023208129A1
Application number: PCT/CN2023/091268
Authority: WO
Inventors: 魏文建; 王冠军; 丁二刚; 朱丽星; 吴振鑫
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-04-29
Filing date: 2023-04-27
Publication date: 2023-11-02
Also published as: CN217464958U

Abstract

A microchannel heat exchanger group (100) and an air conditioning system (200) having same. The microchannel heat exchanger group (100) comprises a plurality of fins (10) and a plurality of rows of first flat tubes (21) and second flat tubes (31); the microchannel heat exchanger group (100) further at least comprises a first heat exchanger (20) and a second heat exchanger (30); the first heat exchanger (20) and the second heat exchanger (30) are independent of each other; the first heat exchanger (20) comprises the plurality of first flat tubes (21); the second heat exchanger (30) comprises the plurality of second flat tubes (31); insertion slots comprise first insertion slots (111) and second insertion slots (112); the first flat tubes (21) are inserted into the first insertion slots (111); and the second flat tubes (31) are inserted into the second insertion slots (112). The air conditioning system (200) comprises the microchannel heat exchanger group (100).

Description

Microchannel heat exchanger group and air conditioning system having the same

Related applications

This application claims priority to the Chinese patent application filed on April 29, 2022, with application number 202221085342.4 and titled "Microchannel heat exchanger group and air conditioning system having the same", the full text of which is hereby incorporated by reference.

Technical field

The present application relates to the field of refrigeration technology, and in particular to a microchannel heat exchanger group and an air conditioning system having the same.

Background technique

Microchannel heat exchanger group is a type of compact, lightweight and efficient heat exchanger designed to meet the needs of industrial development.

In the existing structure, a refrigeration system usually requires a set of corresponding microchannel heat exchangers, so that the heat transfer capacity of the fins in the microchannel heat exchanger cannot be fully utilized, thereby reducing the heat transfer rate of the microchannel heat exchanger. Thermal efficiency.

Contents of the invention

According to various embodiments of the present application, a microchannel heat exchanger group capable of improving heat exchange energy efficiency and an air conditioning system having the same are provided.

In order to solve the above technical problems, this application provides the following technical solutions:

A microchannel heat exchanger group, including a plurality of fins arranged side by side to form multiple rows, with insertion slots provided on the fins; the microchannel heat exchanger group also includes at least a first heat exchanger and a second heat exchanger, the first heat exchanger includes a plurality of first flat tubes, the second heat exchanger includes a plurality of second flat tubes, the plurality of first flat tubes and the third Two flat tubes are arranged along the length direction of the fin to form multiple layers, the first flat tube and the second flat tube are arranged along the width direction of the fin to form multiple rows; the plug-in slot includes a third A plug-in slot and a second plug-in slot, the first flat tube is plugged into the first plug-in slot, the second flat tube is plugged into the second plug-in slot, the third A flat tube and the second flat tube are arranged to be separated from each other.

It can be understood that in this application, the microchannel heat exchanger group also includes a first heat exchanger and a second heat exchanger that are independent of each other, so that when one of the heat exchangers is not working, the other heat exchanger The device can make full use of the heat exchange area of the fins for heat exchange, thereby improving the energy efficiency of the microchannel heat exchanger group.

In one embodiment, along the length direction of the fin, the first flat tube and the second flat tube are mutually Staggered settings.

It can be understood that by staggering the first flat tubes and the second flat tubes, when one heat exchanger is not working, the other heat exchanger can further make full use of the fins. The heat exchange area is used to conduct heat exchange, thereby improving the energy efficiency of the microchannel heat exchanger group.

In one embodiment, the first heat exchanger includes a first pipe assembly and a second pipe assembly, the first flat tube, the first pipe assembly and the second pipe assembly are all connected, and the refrigerant The first flat tube enters from the first pipe assembly and flows out from the second pipe assembly to form a first flow path; the second heat exchanger includes a third pipe assembly and a fourth pipe assembly, The second flat tube, the third tube assembly and the fourth tube assembly are all connected, and the refrigerant enters the first flat tube from the third tube assembly and flows out from the fourth tube assembly, To form a second circulation path; wherein, every M first circulation paths and every N second circulation paths alternate and are isolated from each other, and M and N are both natural numbers greater than or equal to 1.

In one embodiment, M and N satisfy the following relationship: M=N.

In one embodiment, the plug-in slots are provided on the same side of the fins; the plug-in slots of adjacent rows of fins are staggered; or, the plug-in slots are provided on opposite sides of the fins. There are plug-in slots, and the plug-in slots on opposite sides of the fins are staggered.

It can be understood that by staggering the insertion slots to increase the contact area between the first flat tube, the second flat tube and the fin, thereby improving the efficiency of the microchannel heat exchanger group heat transfer efficiency.

In one embodiment, the first pipe assembly includes a first distributor and a plurality of first capillary tubes connected to the first distributor, and two ends of each first capillary tube are respectively connected to the first capillary tube. The distributor and the corresponding first flat tube; the third pipe assembly includes a second distributor and a plurality of second capillary tubes connected to the second distributor, with both ends of each second capillary tube Connect the second distributor and the corresponding second flat tube respectively.

It can be understood that by arranging the first distributor and the second distributor, the refrigerant enters the first flat tube and the first flat tube after being evenly distributed in the first distributor and the second distributor. in the second flat tube, thus simplifying the process.

In one embodiment, the second pipe assembly includes a first manifold and a plurality of first pipes connected to the first manifold, and two ends of each first pipe are respectively connected to the respective first pipes. The first header and the corresponding first flat tube; the fourth takeover assembly includes a second header and a plurality of second takeovers connected to the second header, each of which Two ends of the second pipe are connected to the second header and the corresponding second flat tube respectively.

It can be understood that by arranging the first header and the second header, it is convenient to collect the refrigerant in the first flat tube and the second flat tube.

In one embodiment, the first flat tube and the second flat tube are both in multiple rows, the first heat exchanger includes a first elbow, and the second heat exchanger includes a second elbow. , adjacent rows of the first flat tubes are connected through the first bent tube, The first bent tube and the first flat tube are arranged separately; the adjacent rows of second flat tubes are connected through the second bent tube, and the second bent tube and the second flat tube are separated. set up.

It can be understood that by making the microchannel heat exchanger group include a plurality of the first elbows and the second elbows, the refrigerant can be turned to avoid bending of the fins and causing the bending of the refrigerant. Fin deformation problem.

In one embodiment, the microchannel heat exchanger group further includes a transfer tube, which is disposed between the first capillary tube and the first flat tube and between the second capillary tube and the third flat tube. Between the two flat tubes, the adapter tube faces the tube openings of the first flat tube and the second flat tube and matches the tube openings of the first flat tube and the second flat tube.

It can be understood that by providing the transfer tube, the connection between the capillary tube and the flat tube is facilitated.

This application also provides the following technical solution: an air conditioning system including a microchannel heat exchanger group.

Compared with the related art, this application makes the microchannel heat exchanger group also include a first heat exchanger and a second heat exchanger that are independent of each other, so that when one of the heat exchangers does not work, the other heat exchanger The heat exchanger can make full use of the heat exchange area of the fins for heat exchange, thereby improving the energy efficiency of the microchannel heat exchanger group.

Description of drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for this purpose. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram from a perspective of the microchannel heat exchanger group provided by this application.

Figure 2 is a schematic structural diagram of the microchannel heat exchanger group provided by this application from another perspective.

Figure 3 is a schematic structural diagram of an embodiment of the flow path layout of the microchannel heat exchanger group provided by this application.

Figure 4 is a schematic structural diagram of another embodiment of the flow path arrangement of the microchannel heat exchanger group provided by this application.

Figure 5 is a schematic structural diagram of an air conditioning system including a microchannel heat exchanger group provided by this application.

Reference signs: 100. Microchannel heat exchanger group; 10. Fins; 11. Plug-in slot; 111. First plug-in slot; 112. Second plug-in slot; 20. First heat exchanger; 21. First flat tube; 22, first takeover assembly; 221, first distributor; 222, first capillary tube; 23, second takeover assembly; 231, first header; 232, first takeover; 30, second Heat exchanger; 31. Second flat tube; 32. Third pipe assembly; 321. Second distributor; 322. Second capillary tube; 33. Fourth pipe assembly; 331. Second manifold; 332. Second Take over; 40. First elbow pipe; 41. Second elbow pipe; 50. Transfer pipe; 200. Air conditioning system.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that when a component is said to be "fixed" or "set to" another component, it can be directly on the other component or there may also be an intermediate component present. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be an intermediate component present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of this application are for illustrative purposes only and do not represent the only implementation. Way.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise expressly stated and limited, the first feature being "on" or "below" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact. Contact through intermediaries. Moreover, the terms “above”, “above” and “above” the first feature of the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature of the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meanings as commonly understood by those skilled in the technical field of this application. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of this application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to Figure 1 and Figure 4. This application provides a micro-channel heat exchanger group 100, which is installed in an air-conditioning system. There is a medium flowing in the micro-channel heat exchanger group 100. The micro-channel heat exchanger group 100 assists the medium with Heat exchange with the outside world.

In order to solve the problems existing in the existing micro-channel heat exchanger group, the present application provides a micro-channel heat exchanger group 100, which includes multiple fins 10. The multiple fins 10 are arranged side by side to form multiple rows. A plug-in slot 11 is provided on the sheet 10, and the first flat tube 21 and the second flat tube 31 are plugged into the plug-in slot 11; the microchannel heat exchanger group 100 also includes at least a first heat exchanger 20 and a second heat exchanger. The heat exchanger 30, the first heat exchanger 20 and the second heat exchanger 30 are independent of each other, and the first heat exchanger 20 includes a plurality of The first flat tube 21 and the second heat exchanger 30 include a plurality of second flat tubes 31. The plurality of first flat tubes 21 and second flat tubes 31 are arranged in multiple layers along the length direction of the fin 10. The first flat tube 21 and second flat tubes 31 are arranged in multiple rows along the width direction of the fin 10; the plug-in slot 11 includes a first plug-in slot 111 and a second plug-in slot 112, and the first flat tube 21 is plugged into the first plug-in slot 111. In the connecting slot 111, the second flat tube 31 is inserted into the second inserting slot 112, and the first flat tube 21 and the second flat tube 31 are isolated from each other and are not connected.

It should be noted that the microchannel heat exchanger group 100 provided by this application includes at least two heat exchangers. The advantage of arranging at least two independent heat exchangers in the same group of heat exchanger fins 10 structure is that: On the one hand, the operating status of each heat exchanger can be controlled individually according to the actual situation to improve the compatibility performance of the microchannel heat exchanger group 100; on the other hand, when one heat exchanger does not work, the other heat exchanger The heat exchange area of the fins 10 can be fully utilized for heat exchange, which not only saves material costs, but also improves the energy efficiency of the microchannel heat exchanger group 100.

It is worth noting that in this application, the fins 10 extend in the vertical direction, and multiple fins 10 are juxtaposed to form multiple rows. The first flat tube 21 and the second flat tube 31 extend in the horizontal direction, and in the vertical direction. , the first flat tubes 21 and the second flat tubes 31 are arranged in sequence to form multiple layers, and the multi-layered first flat tubes 21 and the second flat tubes 31 are arranged side by side in the horizontal direction to form multiple rows. The first flat tubes 21 and the second flat tubes 31 are The tubes 31 are arranged to form multiple layers and multiple rows, which makes the structure of the microchannel heat exchanger group 100 more compact and improves the heat exchange efficiency.

In this embodiment, the microchannel heat exchanger group 100 at least includes the first heat exchanger 20 and the second heat exchanger 30 , which means that the microchannel heat exchanger group 100 is provided with at least two mutually independent heat exchangers. , in other embodiments, the microchannel heat exchanger group 100 may also include a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger or even a greater number of heat exchangers, which are not limited here, and This embodiment takes two heat exchangers as an example to illustrate.

As shown in Figure 1, each fin 10 extends in the vertical direction, and multiple fins 10 are arranged side by side in the horizontal direction to form multiple rows of fins 10. The insertion slots 11 are opened on the same side of each row of fins 10. The insertion slots 11 of adjacent rows of fins 10 are staggered, so that the contact area between the flat tube and the fins 10 is large and the heat exchange efficiency is improved.

Of course, in other embodiments, plug-in slots 11 can also be provided on both sides of each row of fins 10, and the plug-in slots 11 on opposite sides of the fins 10 are staggered, and each slot is staggered. Flat tubes are inserted into each of the micro-channel heat exchanger groups 11, and the flat tubes extend in the horizontal direction. The staggered flat tubes have a larger contact area with the air, thereby improving the heat transfer efficiency of the micro-channel heat exchanger group 100.

As shown in Figure 2, the first heat exchanger 20 includes a first takeover assembly 22 and a second takeover assembly 23. The first takeover assembly 22 includes a first distributor 221 and a plurality of first capillary tubes connected to the first distributor 221. 222. Both ends of each first capillary tube 222 are respectively connected to the first distributor 221 and the corresponding first flat tube 21. The refrigerant in the first distributor 221 is distributed to each first capillary tube 222 through a plurality of first capillary tubes 222. In the flat tube 21; that is to say, the refrigerant enters the first distributor 221 from the end of the first distributor 221 away from the first capillary tube 222. Since the outlet end of the first distributor 221 has A plurality of small holes are connected to the first capillary tubes 222. One end of the plurality of first capillary tubes 222 is connected to each small hole on the outlet end of the first distributor 221, and the other end of the first capillary tube 222 is connected to a micron. For each first flat tube 21 in the channel heat exchanger group 100, the refrigerant enters each first flat tube 21 through each first capillary tube 222, so that the refrigerant is more evenly distributed to each first flat tube 21. Capillary 222.

The second connecting pipe assembly 23 includes a first collecting pipe 231 and a plurality of first connecting pipes 232 connected to the first collecting pipe 231. Both ends of each first connecting pipe 232 are respectively connected to the first collecting pipe 231 and the corresponding connecting pipe. The refrigerant in the first flat tubes 21 is collected into the first header 231 through the first headers 232; that is to say, the first header 231 is also provided with a plurality of first headers 232. There are flow holes for connecting the first pipes 232. One end of the plurality of first pipes 232 is connected to each flow hole on the first header 231, and the other end of the first pipes 232 is connected to the micro-circuit. For each first flat tube 21 in the channel heat exchanger group 100, the refrigerant entering each first flat tube 21 from each first capillary tube 222 then flows into each first connecting tube 232, and flows from the plurality of first flat tubes 232 to each first flat tube 21. A connecting pipe 232 flows into the first header 231 to collect, and then flows out from the first header 231 as a whole, thus completing a heat exchange circulation process in the first heat exchanger 20 .

The second heat exchanger 30 includes a third takeover assembly 32 and a fourth takeover assembly 33. The third takeover assembly 32 includes a second distributor 321 and a plurality of second capillary tubes 322 connected to the second distributor 321. Each second Both ends of the capillary tube 322 are respectively connected to the second distributor 321 and the corresponding second flat tube 31. The refrigerant in the second distributor 321 is distributed into each second flat tube 31 through the plurality of second capillary tubes 322; also That is to say, the refrigerant enters the second distributor 321 from the end of the second distributor 321 away from the second capillary tube 322. Since the outlet end of the second distributor 321 is provided with a plurality of small holes connecting the second capillary tubes 322, the plurality of One end of the second capillary tube 322 is connected to each small hole on the outlet end of the second distributor 321, and the other end of the second capillary tube 322 is connected to each second flat hole in the microchannel heat exchanger group 100. The refrigerant enters each second flat tube 31 through each second capillary tube 322 , so that the refrigerant is more evenly distributed to each second capillary tube 322 .

The fourth connecting pipe assembly 33 includes a second collecting pipe 331 and a plurality of second connecting pipes 332 connected to the second collecting pipe 331. The two ends of each second connecting pipe 332 are respectively connected to the second collecting pipe 331 and the corresponding connecting pipe. The refrigerant in the second flat tubes 31 is collected into the second header 331 through the second headers 332; that is to say, the second header 331 is also provided with a plurality of second headers 332. There are flow holes for connecting the second pipes 332. One end of the plurality of second pipes 332 is connected to each flow hole on the second header pipe 331, and the other end of the second pipes 332 is connected to the micro-tube. For each second flat tube 31 in the channel heat exchanger group 100, the refrigerant entering each second flat tube 31 from each second capillary tube 322 then flows into each second connecting tube 332, and flows from the plurality of second flat tubes 332. The two pipes 332 flow into the second header 331 to collect, and then flow out from the second header 331 as a whole, thus completing a heat exchange circulation process in the second heat exchanger 30 .

In some embodiments, the first flat tubes 21 and the second flat tubes 31 are staggered and isolated from each other. In this way, when one of the heat exchangers is not working, the other heat exchanger can further make full use of the heat exchange area of the fins 10. Heat exchange is performed, thereby improving the energy efficiency of the microchannel heat exchanger group 100. It should be noted that if the first flat tubes 21 are all arranged side by side in the upper or lower half of the microchannel heat exchanger group 100, the second flat tubes 31 are all arranged side by side in the microchannel heat exchanger group 100. The lower or upper half, then when one of the heat exchangers is not working, the first flat tube 21 or the second flat tube 31 can only use half of the fin 10 area in the microchannel heat exchanger group 100 where it is located. To perform heat exchange, compared with the method of arranging the first flat tubes 21 and the second flat tubes 31 in a staggered manner in the microchannel heat exchanger group 100, it is obvious that the first flat tubes 21 and the second flat tubes 31 are arranged in an staggered manner. The heat exchange area of the fins 10 can be utilized to a greater extent, thereby improving the energy efficiency of the microchannel heat exchanger group 100.

In some embodiments, the first flat tubes 21 and the second flat tubes 31 are each in at least two rows, and the microchannel heat exchanger group 100 further includes a plurality of first elbow tubes 40 and second elbow tubes 41, with adjacent rows of first and second elbow tubes 40 and 41. A flat tube 21 is connected through the first bent tube 40, and the first bent tube 40 and the first flat tube 21 are arranged separately; the adjacent rows of second flat tubes 31 are connected through the second bent tube 41, and the second bent tube 41 and the first flat tube 21 are connected separately. The two flat tubes 31 are arranged separately.

It should be noted that in existing microchannel heat exchanger groups, the fins are usually arranged in multiple rows by bending the fins. This will cause the fins to deform during the bending process and affect the heat exchange efficiency. Therefore, in order to solve this problem, this application connects adjacent rows of flat tubes through bent tubes to realize the turning of the refrigerant and avoid the deformation problem of the fins 10 caused by bending of the fins 10 .

In some embodiments, the microchannel heat exchanger group 100 further includes a transfer tube 50 . The adapter tube 50 is disposed between the first capillary tube 222 and the first flat tube 21 and between the second capillary tube 322 and the second flat tube 31. On the one hand, because the first capillary tube 222 and the second capillary tube 322 are particularly thin and have cross-sections is circular, and the cross section of the first flat tube 21 and the second flat tube 31 is in the shape of a strip hole, so the two cannot be directly connected, and the connection between the two needs to be realized through the transfer of the transfer pipe 50. Wherein, the transfer tube 50 is arranged in a circular shape close to the first capillary tube 222 or the second capillary tube 322 to match the capillary tube, and one end of the transfer tube 50 close to the first flat tube 21 and the second flat tube 31 is arranged to be suitable for the flat tubes. On the other hand, there are usually multiple circulation channels in the flat tube to increase its heat exchange area, while there is only one circulation channel inside the capillary tube. In order to make one circulation channel in the capillary tube and the multiple circulation channels in the flat tube The connection of the circulation channel also requires the transfer of the transfer pipe 50 to achieve it.

Specifically, the refrigerant in the first heat exchanger 20 enters from the first distributor 221, flows into the first flat tube 21 through the first capillary tube 222, then flows into the first header 231 through the first connecting pipe 232, and flows from the first header 232 to the first header 231. The collecting tube 231 flows out to form a first circulation path; the refrigerant in the second heat exchanger 30 enters from the second distributor 321 , flows into the second flat tube 31 through the second capillary tube 322 , and then passes through the second connecting tube 332 It flows into the second header 331 and flows out from the second header 331 to form a second flow path. It should be noted that when the first flat tube 21 is a double row, the refrigerant enters from the first distributor 221, flows into the first flat tube 21 through the first capillary tube 222, turns through the first elbow 40, and flows to the adjacent The first flat tubes 21 in the row then flow into the first header 231 through the first connecting tube 232 and flow out from the first header 231. To form a first flow path; when the first flat tubes are in three rows, first elbows 40 and second elbows 41 are provided at both ends of the first flat tube 21 and the second flat tube 31, and the refrigerant flows from the A distributor 221 enters, flows into the first flat tube 21 through the first capillary tube 222, turns through the first elbow 40, flows into the first flat tubes 21 of the second row, then turns through the first elbow 40, and flows into the second row of first flat tubes 21. The three rows of first flat tubes 21 flow into the first header 231 through the first connecting tube 232 and flow out from the first header 231 to form a first circulation path. The same is true for the Lutong path, so I won’t go into details here.

In this embodiment, every M first flow paths and every N second flow paths alternate with each other and are isolated from each other.

In some embodiments, M and N satisfy the relationship: M=N.

As shown in FIG. 3 , when M=N, in one embodiment, each first flow path and each second flow path alternate with each other and are isolated from each other. Regarding the utilization of the fins 10 of each heat exchanger, this flow path arrangement maximizes the utilization.

As shown in FIG. 4 , when M=N, in another embodiment, the flow path arrangement scheme is that every two first flow paths and every two second flow paths alternate with each other and are isolated from each other.

Of course, in the case of M=N, in other embodiments, M and N can be any positive integer greater than 0, and no examples are given here.

Of course, there can be many ways to arrange the flow paths, and the values of M and N can also be unequal. For example, the flow path arrangement scheme is that every two first flow paths and every second flow path alternate with each other and are isolated from each other, or , the flow path arrangement scheme is that every first flow path and every two second flow paths alternate and are isolated from each other, or the flow path layout scheme is that every three first flow paths and every two second flow paths alternate with each other And separated from each other, there is no limitation here. By adjusting the arrangement of the flow paths, the heat exchange intensity of the first heat exchanger 20 and the second heat exchanger 30 can be adjusted according to the actual application conditions, thereby changing the heat exchange intensity at different positions of the microchannel heat exchanger group 100, effectively Control the specific heat exchange mode of the microchannel heat exchanger group 100.

This application also provides a technical solution as follows:

An air conditioning system includes a microchannel heat exchanger group 100. The microchannel heat exchanger group 100 also has the same advantages as the above-mentioned air conditioning system.

The microchannel heat exchanger group 100 provided by this application also includes a first heat exchanger 20 and a second heat exchanger 30 that are independent of each other, so that when one of the heat exchangers is not working, At this time, another heat exchanger can fully utilize the heat exchange area of the fins 10 for heat exchange, thereby improving the energy efficiency of the microchannel heat exchanger group 100.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the scope of patent protection of this application should be determined by the appended claims.

Claims

A microchannel heat exchanger group includes a plurality of fins arranged side by side to form multiple rows, and plug-in slots are provided on the plurality of fins;

It is characterized in that the microchannel heat exchanger group also includes at least a first heat exchanger and a second heat exchanger, the first heat exchanger includes a plurality of first flat tubes, and the second heat exchanger includes A plurality of second flat tubes. A plurality of first flat tubes and second flat tubes are arranged along the length direction of the fins to form multiple layers. The first flat tubes and the second flat tubes are arranged along the length direction of the fins. The fins are arranged in multiple rows in the width direction; the plug-in slot includes a first plug-in slot and a second plug-in slot, the first flat tube is plugged into the first plug-in slot, and the The second flat tube is inserted into the second insertion slot, and the first flat tube and the second flat tube are separated from each other.
The microchannel heat exchanger group according to claim 1, characterized in that, along the length direction of the fins, the first flat tubes and the second flat tubes are arranged staggered with each other.
The microchannel heat exchanger group according to claim 2, wherein the first heat exchanger includes a first take-over assembly and a second take-over assembly, the first flat tube, the first take-over assembly and The second pipe assemblies are all connected, and the refrigerant enters the first flat tube from the first pipe assembly and flows out from the second pipe assembly to form a first circulation path;

The second heat exchanger includes a third take-over assembly and a fourth take-over assembly. The second flat tube, the third take-over assembly and the fourth take-over assembly are all connected, and the refrigerant flows from the third take-over assembly. Entering the first flat tube and flowing out from the fourth pipe assembly to form a second flow path;

Wherein, every M first circulation paths and every N second circulation paths alternate and are isolated from each other, and M and N are both natural numbers greater than or equal to 1.
The microchannel heat exchanger group according to claim 3, wherein the M and N satisfy the following relationship:
M=N.
The microchannel heat exchanger group according to claim 1, characterized in that the plug-in slots are opened on the same side of the fins, and the plug-in slots of adjacent rows of the fins are staggered;

Alternatively, the insertion slots are provided on opposite sides of the fin, and the insertion slots on opposite sides of the fin are staggered.
The microchannel heat exchanger group according to claim 3, wherein the first pipe assembly includes a first distributor and a plurality of first capillary tubes connected to the first distributor, and each of the first capillary tubes is connected to the first distributor. Two ends of a capillary tube are respectively connected to the first distributor and the corresponding first flat tube;

The third pipe assembly includes a second distributor and a plurality of second capillary tubes connected to the second distributor. Both ends of each second capillary tube are respectively connected to the second distributor and the corresponding ones. Describe the second flat tube.
The microchannel heat exchanger group according to claim 6, wherein the second pipe assembly includes a first header and a plurality of first pipes connected to the first header, each The two ends of the first connecting pipe are respectively connected to the first header pipe and the corresponding first flat pipe;

The fourth pipe assembly includes a second manifold and a plurality of second pipes connected to the second manifold. Two ends of each second pipe are respectively connected to the second manifold and the second manifold. Corresponding to the second flat tube.
The microchannel heat exchanger group according to claim 1, wherein the first flat tube and the second flat tube are in multiple rows, and the first heat exchanger includes a first bent tube. The second heat exchanger includes a second bent tube, adjacent rows of the first flat tubes are connected through the first bent tube, the first bent tube and the first flat tube are arranged separately; the adjacent rows The second flat tube is connected through the second bent tube, and the second bent tube and the second flat tube are arranged separately.
The microchannel heat exchanger group according to claim 6, characterized in that the microchannel heat exchanger group further includes a transfer tube, and the transfer tube is arranged between the first capillary tube and the first flat tube. and between the second capillary tube and the second flat tube, the transfer tube faces the nozzles of the first flat tube and the second flat tube and the first flat tube and the second flat tube. The orifice of the flat tube is suitable.
An air conditioning system, characterized by including the microchannel heat exchanger group according to any one of claims 1-9.