CN217464958U - Microchannel heat exchanger group and air conditioning system having the same - Google Patents

Abstract

The application relates to the technical field of refrigeration, in particular to a micro-channel heat exchanger group and an air conditioning system with the same. The microchannel heat exchanger group comprises a plurality of fins, a plurality of rows of first flat tubes and a plurality of rows of second flat tubes; the micro-channel heat exchanger group further at least comprises a first heat exchanger and a second heat exchanger which are mutually independent, the first heat exchanger comprises a plurality of first flat pipes, the second heat exchanger comprises a plurality of second flat pipes, the insertion grooves comprise first insertion grooves and second insertion grooves, the first flat pipes are inserted into the first insertion grooves, and the second flat pipes are inserted into the second insertion grooves. The utility model also provides an air conditioning system, it includes above-mentioned microchannel heat exchanger group. Compared with the prior art, the utility model has the advantages of: when one of the heat exchangers does not work, the other heat exchanger can fully utilize the heat exchange area of the fins for heat exchange, and therefore the energy efficiency of the micro-channel heat exchanger group is improved.

Description

Microchannel heat exchanger group and air conditioning system having the same

technical field

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

Background technique

Micro-channel heat exchanger group is a kind of compact, lightweight and high-efficiency heat exchanger designed to meet the needs of industrial development.

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

Utility model content

Based on this, it is necessary to provide a microchannel heat exchanger group capable of improving heat exchange energy efficiency and an air conditioning system having the same.

In order to solve the above-mentioned technical problems, the utility model provides the following technical solutions:

A micro-channel heat exchanger group, comprising a plurality of fins, the fins are arranged side by side to form a plurality of rows, and the fins are provided with insertion slots; the micro-channel heat exchanger group also includes at least a first heat exchange 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, a plurality of the first flat tubes and the first flat tubes Two 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 width direction of the fins to form multiple rows; An insertion slot and a second insertion slot, the first flat tube is inserted into the first insertion slot, the second flat tube is inserted into the second insertion slot, and the first flat tube is inserted into the second insertion slot. A flat tube and the second flat tube are arranged to be separated from each other.

It can be understood that, in the present application, by making the microchannel heat exchanger group further include a first heat exchanger and a second heat exchanger independent of each other, so that when one of the heat exchangers is not working, 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.

In one embodiment, along the length direction of the fin, the first flat tubes and the second flat tubes are staggered.

It can be understood that, by staggering the first flat tubes and the second flat tubes, when one of the heat exchangers does not work, the other heat exchanger can further utilize the fins The heat exchange area is used for heat exchange, thereby improving the energy efficiency of the microchannel heat exchanger group.

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

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

In one embodiment, the insertion grooves are opened on the same side of the fins; the insertion grooves of the fins in adjacent rows are staggered; or, the fins are opened on opposite sides There are the insertion slots, and the insertion slots on opposite sides of the fin are arranged staggered.

It can be understood that the contact area between the first flat tube, the second flat tube and the fin is increased by staggering the insertion grooves, thereby improving the micro-channel heat exchanger group. heat transfer efficiency.

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

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. into the second flat tube, thereby simplifying the process.

In one embodiment, the second nozzle assembly includes a first collector and a plurality of first nozzles connected to the first collector, and two ends of each of the first nozzles are respectively connected to the first nozzle. the first header and the corresponding first flat tube; the fourth nozzle assembly includes a second header and a plurality of second headers connected to the second header, each of which is connected to the second header. Two ends of the second pipe are respectively connected to the second header and the corresponding second flat tube.

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

In one of the embodiments, the first flat tube and the second flat tube are multiple rows, the first heat exchanger includes a first elbow, and the second heat exchanger includes a second elbow , the first flat tubes in adjacent rows are communicated through the first elbows, and the first elbows are arranged separately from the first flat tubes; the second flat tubes in adjacent rows pass through the second The elbow is in communication, and the second elbow and the second flat tube are arranged separately.

It can be understood that by making the micro-channel heat exchanger group include a plurality of the first elbows and the second elbows, the turning of the refrigerant can be realized, and the bending of the fins to avoid the occurrence of the Deformation of the fins.

In one embodiment, the micro-channel heat exchanger group further includes an adapter pipe, the adapter pipe is arranged between the first capillary tube and the first flat tube and the second capillary tube and the first flat tube Between the two flat tubes, the nozzles of the adapter pipe facing the first flat tube and the second flat tube are matched with the nozzles of the first flat tube and the second flat tube.

It can be understood that, by arranging the adapter tube, the butt connection between the capillary tube and the flat tube is facilitated.

The utility model also provides the following technical solutions:

An air conditioning system includes a microchannel heat exchanger group.

Compared with the prior art, the present application makes the microchannel heat exchanger group further include a first heat exchanger and a second heat exchanger independent of each other, so that when one of the heat exchangers does not work, the other 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 illustrate the technical solutions in the embodiments of the present application or in the traditional technology, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the traditional technology. Obviously, the drawings in the following description are only the For some embodiments of the application, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

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

2 is a schematic structural diagram of another perspective of the microchannel heat exchanger group provided by the application;

3 is a schematic structural diagram of an embodiment of the flow path arrangement of a microchannel heat exchanger group provided by the present application;

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

Reference numerals: 100, microchannel heat exchanger group; 10, fins; 11, insertion slot; 111, first insertion slot; 112, second insertion slot; 20, first heat exchanger; 21, The first flat tube; 22, the first nozzle assembly; 221, the first distributor; 222, the first capillary; 23, the second nozzle assembly; 231, the first header; 232, the first nozzle; 30, the second heat exchanger; 31, the second flat tube; 32, the third nozzle assembly; 321, the second distributor; 322, the second capillary; 33, the fourth nozzle assembly; 331, the second header; 332, the second Take over; 40, the first elbow; 41, the second elbow; 50, transfer the pipe.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intervening component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a co-existence of an intervening component. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation Way.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and defined, the first feature "on" or "under" the second feature may be that the first feature directly contacts the second feature, or the first feature and the second feature indirectly contact through an intermediary. Also, the first feature is "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature "below", "below" and "below" 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 is level lower than the second feature.

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

Please refer to FIG. 1 and FIG. 4 , a micro-channel heat exchanger group 100 provided by the present invention is installed in an air-conditioning system. A medium flows in the micro-channel heat exchanger group 100, and the micro-channel heat exchanger group 100 assists the medium Exchange heat with the outside world.

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

In order to solve the problems existing in the existing micro-channel heat exchanger group, the present invention provides a micro-channel heat exchanger group 100, which includes a plurality of fins 10, and the plurality of fins 10 are arranged in parallel to form a plurality of rows, The fins 10 are provided with insertion slots 11, and the first flat tubes 21 and the second flat tubes 31 are inserted into the insertion slots 11; the microchannel heat exchanger group 100 also includes at least the first heat exchanger 20 and the second flat tube 31. The heat exchanger 30, the first heat exchanger 20 and the second heat exchanger 30 are independent of each other, the first heat exchanger 20 includes a plurality of first flat tubes 21, and the second heat exchanger 30 includes a plurality of second flat tubes 31 , a plurality of first flat tubes 21 and second flat tubes 31 are arranged along the length direction of the fins 10 to form multiple layers, and the first flat tubes 21 and the second flat tubes 31 are arranged along the width direction of the fins 10 to form multiple rows; The insertion slot 11 includes a first insertion slot 111 and a second insertion slot 112 , the first flat tube 21 is inserted into the first insertion slot 111 , and the second flat tube 31 is inserted into the second insertion slot 112 , 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 the present application includes at least two heat exchangers, and the advantages of arranging at least two mutually independent heat exchangers in the structure of the same group of heat exchanger fins 10 are that one On the one hand, the operating state of each heat exchanger can be individually controlled according to the actual situation to improve the compatibility of the microchannel heat exchanger group 100; on the other hand, when one of the heat exchangers is not working, the other heat exchanger The heat exchange area of the fins 10 can be fully utilized for heat exchange, which not only saves the material cost, but also improves the energy efficiency of the microchannel heat exchanger group 100 .

It is worth noting that in the present application, the fins 10 extend in the vertical direction, multiple fins 10 are juxtaposed to form multiple rows, and the first flat tubes 21 and the second flat tubes 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 order to form a multi-layer, and the multi-layer first flat tubes 21 and the second flat tubes 31 are arranged side by side in the horizontal direction to form multiple rows. The tubes 31 are arranged to form multiple layers and multiple rows, so that the structure of the microchannel heat exchanger group 100 is more compact and the heat exchange efficiency is improved.

In this embodiment, the microchannel heat exchanger group 100 includes at least the first heat exchanger 20 and the second heat exchanger 30 means that at least two mutually independent heat exchangers are provided in the microchannel heat exchanger group 100 , in other embodiments, the microchannel heat exchanger group 100 may further include a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger or even more heat exchangers, which is not limited here, and This embodiment is described by taking two heat exchangers as an example.

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

Of course, in other embodiments, insertion slots 11 may also be formed on both sides of each row of fins 10 , and the insertion slots 11 on opposite sides of the fins 10 are staggered, and each insertion slot staggered Flat tubes are inserted in 11, and the flat tubes are extended in the horizontal direction, and the flat tubes arranged staggered 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 FIG. 2 , the first heat exchanger 20 includes a first nozzle assembly 22 and a second nozzle assembly 23 . The first nozzle assembly 22 includes a first distributor 221 and a plurality of first capillaries connected to the first distributor 221 . 222, two ends of each first capillary tube 222 are respectively connected to the first distributor 221 and the corresponding first flat tube 21, and the refrigerant in the first distributor 221 is distributed to each first In the flat tube 21; that is, the refrigerant enters the first distributor 221 from the end of the first distributor 221 away from the first capillary tube 222, because the outlet end of the first distributor 221 is provided with a plurality of connecting first capillary tubes 222 One end of the plurality of first capillary tubes 222 is respectively connected to each small hole on the outlet end of the first distributor 221, and the other end of the first capillary tubes 222 is respectively connected to the microchannel heat exchanger group 100. For each first flat tube 21 , 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 capillary tube 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, and two ends of each first connecting pipe 232 are respectively connected to the first collecting pipe 231 and the corresponding the first flat tubes 21, the refrigerants in the plurality of first flat tubes 21 are collected in the first header 231 through the plurality of first pipes 232; that is to say, the first header 231 also has a plurality of One end of the plurality of first pipes 232 is respectively connected to each circulation hole on the first header 231, and the other ends of the first pipes 232 are respectively connected to the micro-channels. 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 flows into each first connecting tube 232, and flows from a plurality of first flat tubes 222 into each first flat tube 232. A nozzle 232 flows into the first header 231 for collection, and then flows out from the first header 231 as a whole, thus completing a heat exchange and circulation process in the first heat exchanger 20 .

The second heat exchanger 30 includes a third nozzle assembly 32 and a fourth nozzle assembly 33. The third nozzle assembly 32 includes a second distributor 321 and a plurality of second capillaries 322 connected to the second distributor 321, each of which is a second Two ends of the capillary tube 322 are respectively connected to the second distributor 321 and the corresponding second flat tube 31, and the refrigerant in the second distributor 321 is distributed in each second flat tube 31 through the plurality of second capillary tubes 322; 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 connected to the second capillary tube 322, a plurality of One end of the second capillary tube 322 is respectively 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 of the second flat tubes in the microchannel heat exchanger group 100 respectively. tube 31 , 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 , and two ends of each second connecting pipe 332 are respectively connected to the second collecting pipe 331 and corresponding The second flat tubes 31 are formed, and the refrigerants in the plurality of second flat tubes 31 are collected into the second header 331 through the plurality of second pipes 332; that is, the second header 331 also has a plurality of One end of the plurality of second pipes 332 is respectively connected to each circulation hole on the second header 331, and the other ends of the second pipes 332 are respectively connected to the micro-channels. 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 flows into each second connecting tube 332, and flows from the plurality of first tubes 322 into each second flat tube 31. The second pipe 332 flows into the second header 331 for collection, and then flows out from the second header 331 as a whole, thus completing the heat exchange and circulation process in the second heat exchanger 30 .

Preferably, 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 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 . It should be noted that, if all the first flat tubes 21 are arranged side by side in the upper or lower half of the microchannel heat exchanger group 100, all the second flat tubes 31 are arranged side by side in the microchannel heat exchanger group 100 The lower half or the 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 area of the fins 10 in the microchannel heat exchanger group 100 where it is located For heat exchange, compared to the way of staggering the first flat tubes 21 and the second flat tubes 31 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 a 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 .

Further, the first flat tubes 21 and the second flat tubes 31 are at least two rows, and the micro-channel heat exchanger group 100 further includes a plurality of first elbows 40 and second elbows 41, and the first flat tubes in adjacent rows 21 is communicated through the first elbow 40, and the first elbow 40 and the first flat tube 21 are arranged separately; the adjacent row of second flat tubes 31 are communicated through the second elbow 41, and the second elbow 41 is connected with the second flat tube 31 split settings.

It should be noted that, in the existing micro-channel heat exchanger group, the fins are usually arranged in multiple rows by bending the fins, which will cause the fins to deform during the bending process and affect the heat exchange efficiency. Therefore, in order to solve this situation, the present application communicates adjacent rows of flat tubes through elbows, so as to realize the turning of the refrigerant and avoid the deformation of the fins 10 caused by the bending of the fins 10 .

Further, the micro-channel heat exchanger group 100 further includes a transfer pipe 50 . The adapter tube 50 is arranged 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 . They are circular, and the cross-sections of the first flat tube 21 and the second flat tube 31 are strip-shaped holes, so they cannot be directly connected to each other. Wherein, the adapter tube 50 close to the first capillary tube 222 or the second capillary tube 322 is set in a circular shape suitable for the capillary tube, and one end of the adapter tube 50 close to the first flat tube 21 and the second flat tube 31 is set to be suitable for the flat tube On the other hand, there are usually multiple flow channels in the flat tube to increase its heat exchange area, while the inside of the capillary is only one flow channel. The communication of the circulation channel also requires the transfer of the transfer pipe 50 to be realized.

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, and then flows into the first header 231 through the first pipe 232, and flows from the first A header 231 flows out to form a first flow 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 flows through the second pipe 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 flow into the first header 231 through the first nozzle 232 and flow out from the first header 231 to form a first flow path; when the first flat tubes are in three rows, Both ends of the first flat tube 21 and the second flat tube 31 are provided with a first elbow 40 and a second elbow 41 . The refrigerant enters from the first distributor 221 and flows into the first flat tube 21 through the first capillary tube 222 , turns through the first elbow 40 , flows into the first flat tube 21 in the second row, then turns through the first elbow 40 , flows into the first flat tube 21 in the third row, and then flows into the first flat tube 21 through the first pipe 232 The first header 231 flows out from the first header 231 to form a first flow path, and the same is true for the second path of the second heat exchanger 30 , which will not be repeated here.

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

Preferably, M and N satisfy the relation: M=N.

As shown in FIG. 3 , in the case of M=N, in an embodiment, the most preferred solution is that each of the first circulation paths and each of the second circulation paths alternate with each other and are isolated from each other. With regard to the utilization of the fins 10 by each heat exchanger, the utilization of this flow path arrangement is maximized.

As shown in FIG. 4 , in the case of 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 may be any positive integers greater than 0, which will not be exemplified here.

Of course, there are many ways to arrange the flow paths, and the values of M and N may not be equal. 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 with each other and are isolated from each other, or, the flow path arrangement scheme is that every three first flow paths and every two second flow paths alternate with each other And they are separated from each other, which is not limited here.

The utility model 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 the present invention, by making the microchannel heat exchanger group 100 further include 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 During operation, the other 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 arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application should be governed by the appended claims.

Claims (10)

1. A micro-channel heat exchanger group, comprising multiple fins (10), the multiple fins (10) are arranged in parallel to form multiple rows, and the fins (10) are provided with insertion slots (11); It is characterized in that, the microchannel heat exchanger group further includes at least a first heat exchanger (20) and a second heat exchanger (30), and the first heat exchanger (20) includes a plurality of first flat tubes (21), the second heat exchanger (30) includes a plurality of second flat tubes (31), and a plurality of the first flat tubes (21) and the second flat tubes (31) are arranged along the fins The sheets (10) are arranged in a length direction to form multiple layers, and the first flat tubes (21) and the second flat tubes (31) are arranged along the width direction of the fins (10) to form multiple rows; the The insertion slot (11) includes a first insertion slot (111) and a second insertion slot (112), and the first flat tube (21) is inserted into the first insertion slot (111), so The second flat tube (31) is inserted into the second insertion groove (112), and the first flat tube (21) and the second flat tube (31) are arranged to be separated from each other. 2. The microchannel heat exchanger group according to claim 1, characterized in that, along the length direction of the fins (10), the first flat tubes (21) and the second flat tubes ( 31) Interleaved with each other. 3. The microchannel heat exchanger group according to claim 2, wherein the first heat exchanger (20) comprises a first nozzle assembly (22) and a second nozzle assembly (23), the first nozzle assembly (23) A flat tube (21), the first connecting tube assembly (22) and the second connecting tube assembly (23) are all in communication, and the refrigerant enters the first flat tube (21) from the first connecting tube assembly (22) ), and flows out from the second nozzle assembly (23) to form a first circulation path; The second heat exchanger (30) includes a third connecting pipe assembly (32) and a fourth connecting pipe assembly (33), the second flat pipe (31), the third connecting pipe assembly (32) and the first connecting pipe assembly (32). The four nozzle assemblies (33) are all connected, and the refrigerant enters the first flat pipe (21) from the third nozzle assembly (32) and flows out from the fourth nozzle assembly (33) to form a second circulation path; Wherein, every M of the first circulation paths and every N of the second circulation paths alternate with each other and are separated from each other, and both M and N are natural numbers greater than or equal to 1. 4. microchannel heat exchanger group according to claim 3, is characterized in that, M and N satisfy following relational formula: M=N. 5 . The microchannel heat exchanger group according to claim 1 , wherein the insertion grooves ( 11 ) are opened on the same side of the fins ( 10 ), and the fins ( 10) the insertion slots (11) are staggered; Alternatively, the insertion grooves (11) are provided on opposite sides of the fin (10), and the insertion grooves (11) on the opposite sides of the fin (10) are arranged in a staggered manner. 6. The microchannel heat exchanger group according to claim 3, characterized in that, the first nozzle assembly (22) comprises a first distributor (221) and a plurality of pipes connected to the first distributor (221) ) first capillary tube (222), two ends of each first capillary tube (222) are respectively connected to the first distributor (221) and the corresponding first flat tube (21); The third nozzle assembly (32) includes a second distributor (321) and a plurality of second capillary tubes (322) connected to the second distributor (321), and each second capillary tube (322) has a The two ends are respectively connected to the second distributor (321) and the corresponding second flat tube (31). 7. The micro-channel heat exchanger group according to claim 6, wherein the second nozzle assembly (23) comprises a first header (231) and a plurality of pipes connected to the first header A first pipe (232) of the pipe (231), two ends of each first pipe (232) are respectively connected to the first header (231) and the corresponding first flat pipe (21) ; The fourth connecting pipe assembly (33) comprises a second collecting pipe (331) and a plurality of second connecting pipes (332) connected to the second collecting pipe (331), each of the second connecting pipes ( 332) are respectively connected to the second header (331) and the corresponding second flat tube (31). 8 . The microchannel heat exchanger group according to claim 1 , wherein the first flat tubes ( 21 ) and the second flat tubes ( 31 ) are in multiple rows, and the first heat exchange The heat exchanger (20) includes a first elbow (40), the second heat exchanger (30) includes a second elbow (41), and the first flat tubes (21) in adjacent rows pass through the first elbow The pipes (40) communicate with each other, and the first elbows (40) and the first flat tubes (21) are arranged separately; the second flat tubes (31) in adjacent rows pass through the second elbows (41). ) communicated with each other, and the second elbow (41) and the second flat tube (31) are arranged separately. 9 . The microchannel heat exchanger group according to claim 6 , wherein the microchannel heat exchanger group further comprises an adapter pipe ( 50 ), and the adapter pipe ( 50 ) is arranged on the first capillary tube. 10 . Between (222) and the first flat tube (21) and between the second capillary tube (322) and the second flat tube (31), the transfer tube (50) faces the first flat tube The nozzles of the tube (21) and the second flat tube (31) are adapted to the nozzles of the first flat tube (21) and the second flat tube (31). 10. An air conditioning system, characterized in that it comprises the microchannel heat exchanger group according to any one of claims 1-9.

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