CN218936724U - Microchannel heat exchanger system and air conditioning system - Google Patents

Abstract

The application relates to the technical field of heat exchangers and discloses a microchannel heat exchanger system, which comprises a first header, a second header, a separation assembly, a pipeline system and a plurality of flat tubes. The first header pipe and the second header pipe are separated into different compartments through the separation assembly, the corresponding compartments are communicated through the pipeline system, and the check valve and the control valve are reasonably arranged in the pipeline system, so that the micro-channel heat exchanger system can adjust the flow paths of the refrigerants according to different working conditions, and the heat exchange performance is greatly improved. The application also discloses an air conditioning system.

Description

Microchannel heat exchanger system and air conditioning system

Technical Field

The application relates to the technical field of heat exchangers, for example, to a micro-channel heat exchanger system and an air conditioning system.

Background

Under the background of energy consumption and atmospheric pollution, heat pump systems with high energy efficiency are receiving more and more attention, and heat exchangers are used as key components of the heat pump systems and play a key role in improving the energy efficiency of the systems. The micro-channel heat exchanger has been widely used in the field of air conditioning due to the advantages of compact structure, high heat exchange efficiency, low refrigerant charge, etc., and it has been a general trend to replace the conventional finned tube heat exchanger with the micro-channel heat exchanger.

The related art discloses a microchannel heat exchanger, and two collector tubes link to each other with many flat pipes, and when microchannel heat exchanger used as condenser and evaporimeter, the flow path of refrigerant is fixed, can only flow through a flat pipe.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

when the micro-channel heat exchanger operates under different working conditions, the flow path is fixed, so that better energy efficiency is difficult to develop.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a micro-channel heat exchanger system and an air conditioning system, which solve the problem that a refrigerant flow path of a micro-channel heat exchanger cannot be adjusted.

In some embodiments, the microchannel heat exchanger comprises:

the device comprises a first collecting pipe, a second collecting pipe and a plurality of flat pipes; wherein, both ends of each flat tube are respectively communicated with the first header and the second header;

a partition assembly including a first partition and a second partition; the first partition part is arranged in the first header and divides the first header into a first compartment and a second compartment; the second partition part is arranged in the second header and divides the second header into a third compartment, a fourth compartment, a fifth compartment and a sixth compartment which are sequentially arranged along the axial direction of the second header;

the pipeline system comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the first end of the first pipeline is a refrigerant inlet, and the second end of the first pipeline is communicated with the third chamber; the first end of the second pipeline is communicated with the first pipeline, the second end of the second pipeline is communicated with the fifth chamber, and a first one-way valve is arranged on the second pipeline and is limited to allow the refrigerant to flow from the first pipeline to the fifth chamber; the first end of the third pipeline is a refrigerant outlet, and the second end of the third pipeline is communicated with the sixth chamber; the first end of the fourth pipeline is communicated with the third pipeline, the second end of the fourth pipeline is communicated with the fourth chamber, and a second one-way valve is arranged on the fourth pipeline and is defined to allow the refrigerant to flow from the fourth chamber to the third pipeline; the first end of the fifth pipeline is communicated with the second pipeline and is positioned on the downstream side of the first one-way valve, the second end of the fifth pipeline is communicated with the fourth pipeline and is positioned on the upstream side of the second one-way valve, and the fifth pipeline is provided with a control valve.

Optionally, the first compartment and the second compartment are respectively provided with a through partition board;

the through center partition board is perpendicular to the axis of the first collecting pipe, and a through hole is formed in the board surface of the through center partition board.

Optionally, the through hole is disposed at a central position of the through center partition plate.

Optionally, the axial directions of the first header and the second header are parallel to each other, and the second header is vertically arranged;

the third compartment, the fourth compartment, the fifth compartment and the sixth compartment are sequentially arranged from bottom to top.

Optionally, the number of the flat tubes corresponding to the third compartment, the fourth compartment, the fifth compartment and the sixth compartment is the same or different.

Optionally, the number of flat tubes corresponding to the third compartment is equal to the number of flat tubes corresponding to the fifth compartment.

Optionally, the number of flat tubes corresponding to the fourth compartment is equal to the number of flat tubes corresponding to the sixth compartment.

Optionally, in the case that the heat exchanger is used as an evaporator, the refrigerant flows in from the first pipe, and the control valve is closed.

Optionally, in the case that the heat exchanger is used as a condenser, the refrigerant flows in from the second pipe, and the control valve is opened.

In some embodiments, the air conditioning system comprises a microchannel heat exchanger system as described in any of the embodiments above.

The micro-channel heat exchanger system and the air conditioning system provided by the embodiment of the disclosure can realize the following technical effects:

when the micro-channel heat exchanger is used as an evaporator, the refrigerant enters through the first pipeline and the control valve is closed, at the moment, the refrigerant has two flow paths, and the refrigerant passes through the heat exchange flow path with the length of two flat pipes, so that the pressure drop is reduced, and the performance of the heat exchanger is improved. When the condenser is used, the refrigerant enters from the third pipeline and the control valve is opened, at the moment, the refrigerant has a flow path, and the refrigerant passes through the heat exchange flow with the length of four flat pipes, so that the flow rate of the refrigerant is increased, and the performance of the heat exchanger is improved. Therefore, the micro-channel heat exchanger system can adjust the flow paths of the refrigerants according to different working conditions, and the heat exchange performance is greatly improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic diagram of a first microchannel heat exchanger provided in an embodiment of the disclosure;

FIG. 2 is a schematic diagram of a piping system of a first microchannel heat exchanger provided in an embodiment of the disclosure;

FIG. 3 is a flow chart of the refrigerant when the first microchannel heat exchanger provided in the embodiments of the present disclosure is used as an evaporator;

FIG. 4 is a flow chart of the refrigerant when the first microchannel heat exchanger provided in the embodiments of the present disclosure is used as a condenser;

FIG. 5 is a schematic diagram of a second microchannel heat exchanger provided in an embodiment of the disclosure;

FIG. 6 is a schematic diagram of a piping system of a second microchannel heat exchanger provided in an embodiment of the disclosure;

FIG. 7 is a flow chart of the refrigerant when the second microchannel heat exchanger provided in the embodiments of the present disclosure is used as an evaporator;

FIG. 8 is a flow chart of the refrigerant when the second microchannel heat exchanger provided in the embodiments of the present disclosure is used as a condenser;

FIG. 9 is a schematic view of a liquid separation tube according to an embodiment of the present disclosure;

fig. 10 is an enlarged view of a portion a of fig. 9.

Reference numerals:

100: a first header; 110: a first partition; 111: a first compartment; 112: a second compartment; 120: a through partition board; 130: a liquid separating pipe;

200: a second header; 210: a second partition; 211: a seventh compartment; 212: a compartment No. eight; 213: a third compartment; 214: a fourth compartment; 215: a fifth compartment; 216: a sixth compartment;

300: a first pipeline; 310: a second pipeline; 311: a first one-way valve; 320: a third pipeline; 330: a fourth pipeline; 331: a second one-way valve; 340: a fifth pipeline; 341: a control valve;

400: a flat tube; 410: heat exchange fins.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

As shown in connection with fig. 1-4, embodiments of the present disclosure provide a first microchannel heat exchanger comprising a microchannel heat exchanger and a conduit system. The microchannel heat exchanger includes a first header 100, a second header 200, a separation assembly, and a plurality of flat tubes 400. Wherein, two ends of each flat tube 400 are respectively communicated with the first header 100 and the second header 200; the partition assembly includes a first partition 110 and a second partition 210; the first partition 110 is provided in the first header 100, and partitions the first header 100 into a first compartment 111 and a second compartment 112; as shown in fig. 1, a second partition 210 is provided in the second header 200, partitioning the second header 200 into a No. three compartment 213, a No. four compartment 214, a No. five compartment 215, and a No. six compartment 216, which are arranged in this order in the axial direction thereof; as shown in fig. 2, the piping system includes a first piping 300, a second piping 310, a third piping 320, a fourth piping 330, and a fifth piping 340; wherein, the first end of the first pipeline 300 is a refrigerant inlet, and the second end is communicated with the third chamber 213; the first end of the second pipeline 310 is communicated with the first pipeline 300, the second end of the second pipeline 310 is communicated with the fifth chamber 215, and the second pipeline 310 is provided with a first one-way valve 311, and the first one-way valve 311 is defined to allow the refrigerant to flow from the first pipeline 300 to the fifth chamber 215; the first end of the third pipeline 320 is a refrigerant outlet, and the second end is communicated with the sixth chamber 216; the first end of the fourth pipeline 330 is communicated with the third pipeline 320, the second end is communicated with the fourth chamber 214, and a second check valve 331 is arranged on the fourth pipeline 330, and the second check valve 331 is defined to allow the refrigerant to flow from the fourth chamber 214 to the third pipeline 320; the first end of the fifth pipeline 340 is connected to the second pipeline 310 and is located at the downstream side of the first check valve 311, the second end is connected to the fourth pipeline 330 and is located at the upstream side of the second check valve 331, and the control valve 341 is disposed on the fifth pipeline 340.

In the present embodiment, as shown in fig. 1, the first header 100 and the second header 200 are arranged in parallel, and the plurality of flat tubes 400 are uniformly arranged in the axial direction of the first header 100. Each flat tube 400 has a first end in communication with the first header 100 and a second end in communication with the second header 200. The flat tubes 400 are parallel to each other, and the outer portions of the flat tubes 400 are provided with a plurality of heat exchange fins 410 to improve heat exchange effect. With the second header 200 vertically disposed, the first compartment 111 is located below the second compartment 112, and the third compartment 213, the fourth compartment 214, the fifth compartment 215, and the sixth compartment 216 are sequentially disposed from bottom to top.

When the microchannel heat exchanger provided in the embodiment of the present disclosure is used as an evaporator, as shown in fig. 3, the refrigerant enters through the first pipeline 300 and the control valve 341 is closed. Under the unidirectional conduction of the first unidirectional valve 311, the refrigerant in the first pipeline 300 is divided into two paths, one path flows to the third chamber 213, and the other path flows to the fifth chamber 215 through the second pipeline 310. The refrigerant in the third chamber 213 flows to the first chamber 111 through the corresponding flat tube 400, the refrigerant in the first chamber 111 flows to the fourth chamber 214 through the corresponding flat tube 400, and the refrigerant in the fourth chamber 214 flows to the third pipeline 320 through the fourth pipeline 330. The refrigerant in the fifth chamber 215 flows to the second chamber 112 through the corresponding flat tube 400, the refrigerant in the second chamber 112 flows to the sixth chamber 216 through the corresponding flat tube 400, and the refrigerant in the sixth chamber 216 flows to the third pipeline 320. Finally, the refrigerant in the third line 320 flows out of the heat exchanger. Thus, a two-in two-out flow path is formed for the microchannel heat exchanger.

In the condenser, as shown in fig. 4, the refrigerant enters through the third pipe 320 and the control valve 341 is opened. The refrigerant in the third pipeline 320 flows to the sixth chamber 216 under the unidirectional conduction of the second unidirectional valve 331. Refrigerant in the sixth chamber 216 flows to the second chamber 112 through the corresponding flat tube 400, and refrigerant in the second chamber 112 flows to the fifth chamber 215 through the corresponding flat tube 400. The refrigerant in the fifth chamber 215 flows through the second line 310 to the fifth line 340. Under the action of the pressure difference, the refrigerant in the fifth pipeline 340 flows to the fourth chamber 214, and the refrigerant in the fourth chamber 214 flows to the first chamber 111 through the corresponding flat pipe 400. The refrigerant in the first chamber 111 flows to the third chamber 213 through the corresponding flat tube 400. Under the action of the pressure difference, the refrigerant in the third chamber 213 flows to the first pipeline 300, and finally the refrigerant in the first pipeline 300 flows out of the heat exchanger. In this way, a one-in-one-out flow path is created for the microchannel heat exchanger.

It can be seen that when the microchannel heat exchanger provided in the embodiment of the disclosure is used as an evaporator, two flow paths are provided, and the refrigerant passes through the heat exchange processes of the lengths of the two flat tubes 400, so that the pressure drop is reduced, and the performance of the heat exchanger is improved. And when the condenser is used as a condenser, a circulation path is provided, and the refrigerant passes through the heat exchange flow path of the lengths of the four flat tubes 400, so that the flow rate of the refrigerant is increased, and the performance of the heat exchanger is improved. Therefore, the micro-channel heat exchanger system can adjust the flow paths of the refrigerants according to different working conditions, and the heat exchange performance is greatly improved.

Optionally, a through partition 120 is disposed in each of the first compartment 111 and the second compartment 112; the through-center separator 120 is disposed perpendicular to the axis of the first header 100, and has a through-hole formed in a plate surface thereof.

In this embodiment, the first and second partitions 110 and 210 are each solid partitions. The first header 100 is provided therein with one solid partition so as to divide the interior thereof into a first compartment 111 and a second compartment 112, and the second header 200 is provided with three solid partitions in turn in the axial direction thereof so as to divide the interior thereof into a third compartment 213 to a sixth compartment 216. After the first chamber 111 and the second chamber 112 are respectively provided with the through partition 120, the refrigerant can circulate through the through holes to form a new circulation path, which is beneficial to reducing the pressure drop when the microchannel heat exchanger is used as an evaporator and further improving the heat exchange performance.

Alternatively, the through-hole is provided at the center of the through-center partition 120. The side surfaces of the through-center partition plate 120 are abutted against the inner wall of the first header 100 so that the refrigerant can circulate only through the through-holes on both sides of the through-center partition plate 120.

Alternatively, the number of flat tubes 400 corresponding to chamber No. three 213, chamber No. four 214, chamber No. five 215, and chamber No. six 216 are the same or different, respectively. Like this, can set up the quantity of the flat pipe 400 that four compartments correspond according to the wind field of microchannel heat exchanger rationally, the wind field is in a large scale department and is set up the flat pipe 400 of quantity more to improve heat exchange efficiency.

Alternatively, the first compartment 111 corresponds to the third compartment 213 and the fourth compartment 214, and the number of flat tubes 400 corresponding to the first compartment 111 is equal to the sum of the numbers of flat tubes 400 corresponding to the third compartment 213 and the fourth compartment 214. The second compartment 112 corresponds to the fifth compartment 215 and the sixth compartment 216, and the number of flat tubes 400 corresponding to the second compartment 112 is equal to the sum of the number of flat tubes 400 corresponding to the fifth compartment 215 and the sixth compartment 216. And, the number of flat tubes 400 corresponding to the third compartment 213 is equal to the number of flat tubes 400 corresponding to the fifth compartment 215. The number of flat tubes 400 corresponding to compartment number two 112 is equal to the number of flat tubes 400 corresponding to compartment number four 214.

As shown in connection with fig. 5-10, the presently disclosed embodiments provide a second microchannel heat exchanger system having the same locations and communication relationships of the first header 100, the second header 200, and the plurality of flat tubes 400 as the first microchannel heat exchanger system of the above-described embodiments, except for the layout of the plurality of compartments after the second header 200 is divided by the second divider 210, and the communication relationship of the piping system. For a better understanding of both microchannel heat exchangers, the compartments formed after the second header 200 is partitioned are renamed in the embodiments described below.

The partition assembly includes a first partition 110 and a second partition 210; the first partition 110 is provided in the first header 100, and partitions the first header 100 into a first compartment 111 and a second compartment 112; as shown in fig. 5, a second partition 210 is provided in the second header 200, partitioning the second header 200 into a seventh compartment 211 and an eighth compartment 212; as shown in fig. 6, the piping system includes a first piping 300, a second piping 310, a third piping 320, a fourth piping 330, and a fifth piping 340; wherein, the first end of the first pipeline 300 is a refrigerant inlet, and the second end is communicated with the first chamber 111; the first end of the second pipeline 310 is communicated with the first pipeline 300, the second end of the second pipeline 310 is communicated with the second chamber 112, and a first one-way valve 311 is arranged on the second pipeline 310, and the first one-way valve 311 is defined to allow the refrigerant to flow from the first pipeline 300 to the second chamber 112; the first end of the third pipeline 320 is a refrigerant outlet, and the second end is communicated with the seventh chamber 211; the first end of the fourth pipeline 330 is communicated with the third pipeline 320, the second end is communicated with the eighth chamber 212, and a second one-way valve 331 is arranged on the fourth pipeline 330, and the second one-way valve 331 is defined to allow the refrigerant to flow from the eighth chamber 212 to the third pipeline 320; the first end of the fifth pipeline 340 is connected to the second pipeline 310 and is located at the downstream side of the first check valve 311, the second end is connected to the fourth pipeline 330 and is located at the upstream side of the second check valve 331, and the control valve 341 is disposed on the fifth pipeline 340.

In this embodiment, when the microchannel heat exchanger is used as an evaporator, as shown in fig. 7, the refrigerant is introduced through the first pipeline 300 and the control valve 341 is closed. Under the unidirectional conduction of the first unidirectional valve 311, the refrigerant in the first pipeline 300 is divided into two paths, one path flows to the first compartment 111, and the other path flows to the second compartment 112 through the second pipeline 310. The refrigerant in the first chamber 111 flows to the eighth chamber 212 through the corresponding flat tube 400, and the refrigerant in the second chamber 112 flows to the seventh chamber 211 through the corresponding flat tube 400. Under the unidirectional conduction of the second unidirectional valve 331, the refrigerant in the eighth compartment 212 flows to the third pipeline 320 through the fourth pipeline 330, and the refrigerant in the seventh compartment 211 flows to the third pipeline 320. Finally, the refrigerant in the third line 320 flows out of the heat exchanger. Thus, a two-in two-out flow path is formed for the microchannel heat exchanger.

When the microchannel heat exchanger is used as a condenser, as shown in fig. 8, the refrigerant enters through the third pipeline 320 and the control valve 341 is opened. Under the unidirectional conduction of the second unidirectional valve 331, the refrigerant in the third pipeline 320 flows to the seventh compartment 211. The refrigerant in the seventh chamber 211 flows to the second chamber 112 through the corresponding flat tube 400. Under the unidirectional conduction of the first unidirectional valve 311, the refrigerant in the second chamber 112 flows to the fourth pipeline 330 through the fifth pipeline 340. The refrigerant in the fourth line 330 flows into the eighth compartment 212. The refrigerant in the eighth compartment 212 flows to the first compartment 111 through the corresponding flat tube 400. The refrigerant in the first chamber 111 flows to the first pipe 300. Finally, the refrigerant in the first pipeline 300 flows out of the heat exchanger. In this way, a one-in-one-out flow path is created for the microchannel heat exchanger.

It can be seen that when the microchannel heat exchanger provided in the embodiment of the disclosure is used as an evaporator, two flow paths are provided, and the refrigerant passes through the heat exchange process of the length of one flat tube 400, so that the pressure drop is reduced, and the performance of the heat exchanger is improved. And when the condenser is used as a condenser, a circulation path is provided, and the refrigerant passes through the heat exchange flow path of the lengths of the two flat tubes 400, so that the flow rate of the refrigerant is increased, and the performance of the heat exchanger is improved. Therefore, the micro-channel heat exchanger system can adjust the flow paths of the refrigerants according to different working conditions, and the heat exchange performance is greatly improved.

Alternatively, the axial directions of the first header 100 and the second header 200 are parallel to each other; the first compartment 111 corresponds to the eighth compartment 212, and the second compartment 112 corresponds to the seventh compartment 211.

In the present embodiment, in the case where the axial directions of the first header 100 and the second header 200 are parallel to each other and placed vertically, the first compartment 111 is located below the second compartment 112, and the eighth compartment 212 is located below the seventh compartment 211. The first compartment 111 corresponds to the eighth compartment 212, and the second compartment 112 corresponds to the seventh compartment 211.

Alternatively, the position of the first partition 110 in the first header 100 corresponds to the position of the second partition 210 in the second header 200.

Alternatively, the first partition 110 includes a first partition plate disposed perpendicular to the axis of the first header 100; the second partition 210 includes a second partition disposed perpendicular to the axis of the second header 200.

In the present embodiment, the first separator and the second separator are both solid separators, and the side surfaces of the first separator abut against the inner wall of the first header 100, thereby securing the sealability between the first compartment 111 and the second compartment 112. The side of the second separator abuts against the inner wall of the second header 200, thereby securing the sealability between the seventh compartment 211 and the eighth compartment 212.

Alternatively, as shown in fig. 9 and 10, a liquid separating tube 130 is provided in each of the first compartment 111 and the second compartment 112; the second end of the first pipeline 300 is communicated with the liquid separating pipe 130 in the first chamber 111; the second end of the second conduit 310 is connected to the liquid distribution pipe 130 in the second compartment 112.

In the present embodiment, the liquid separation tube 130 in the first compartment 111 is referred to as a first liquid separation tube, and the liquid separation tube 130 in the second compartment 112 is referred to as a second liquid separation tube. The second end of the first pipeline 300 is connected to the first liquid separating pipe, and the second end of the second pipeline 310 is connected to the second liquid separating pipe.

In the case of the liquid separation tube 130, the flow path when the microchannel heat exchanger is used as an evaporator is: the refrigerant is introduced from the first line 300 and the control valve 341 is closed. Under the unidirectional conduction of the first unidirectional valve 311, the refrigerant in the first pipeline 300 is divided into two paths, one path flows to the first liquid separating pipe, and the other path flows to the second liquid separating pipe through the second pipeline 310. The refrigerant in the first liquid separating pipe flows to the first chamber 111, and the refrigerant in the first chamber 111 flows to the eighth chamber 212 through the corresponding flat pipe 400. The refrigerant in the second liquid separating pipe flows to the second chamber 112, and the refrigerant in the second chamber 112 flows to the seventh chamber 211 through the corresponding flat pipe 400. Under the unidirectional conduction of the second unidirectional valve 331, the refrigerant in the eighth compartment 212 flows to the third pipeline 320 through the fourth pipeline 330, and the refrigerant in the seventh compartment 211 flows to the third pipeline 320. Finally, the refrigerant in the third line 320 flows out of the heat exchanger.

In the case of the liquid separation tube 130, the flow path when the microchannel heat exchanger is used as a condenser is: the refrigerant enters through the third pipe 320 and the control valve 341 is opened. Under the unidirectional conduction of the second unidirectional valve 331, the refrigerant in the third pipeline 320 enters the seventh compartment 211. The refrigerant in the seventh chamber 211 flows to the second chamber 112 through the corresponding flat tube 400. The refrigerant in the second chamber 112 flows to the second liquid-dividing pipe, and under the unidirectional conduction of the first unidirectional valve 311, the refrigerant in the second liquid-dividing pipe flows to the fourth pipeline 330 through the fifth pipeline 340. The refrigerant in the fourth line 330 flows into the eighth compartment 212. The refrigerant in the eighth compartment 212 flows to the first compartment 111 through the corresponding flat tube 400. The refrigerant in the first chamber 111 flows to the first liquid distribution pipe, and the refrigerant in the first liquid distribution pipe flows to the first pipeline 300. Finally, the refrigerant in the first pipeline 300 flows out of the heat exchanger.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A microchannel heat exchanger system comprising:

a microchannel heat exchanger comprising a separation assembly, a first header (100), a second header (200), and a plurality of flat tubes (400); wherein, both ends of each flat tube (400) are respectively communicated with the first header (100) and the second header (200);

the partition assembly includes a first partition (110) and a second partition (210); the first partition (110) is provided in the first header (100) and partitions the first header (100) into a first compartment (111) and a second compartment (112); the second partition part (210) is arranged in the second header (200) and divides the second header (200) into a third compartment (213), a fourth compartment (214), a fifth compartment (215) and a sixth compartment (216) which are sequentially arranged along the axial direction of the second header;

a piping system including a first piping (300), a second piping (310), a third piping (320), a fourth piping (330), and a fifth piping (340); wherein, the first end of the first pipeline (300) is a refrigerant inlet, and the second end is communicated with the third chamber (213); the first end of the second pipeline (310) is communicated with the first pipeline (300), the second end of the second pipeline is communicated with the fifth chamber (215), a first one-way valve (311) is arranged on the second pipeline (310), and the first one-way valve (311) is defined to allow a refrigerant to flow from the first pipeline (300) to the fifth chamber (215); the first end of the third pipeline (320) is a refrigerant outlet, and the second end of the third pipeline is communicated with the sixth chamber (216); the first end of the fourth pipeline (330) is communicated with the third pipeline (320), the second end of the fourth pipeline (330) is communicated with the fourth chamber (214), and a second one-way valve (331) is arranged on the fourth pipeline (330), and the second one-way valve (331) is defined to allow the refrigerant to flow from the fourth chamber (214) to the third pipeline (320); the first end of the fifth pipeline (340) is communicated with the second pipeline (310) and is positioned on the downstream side of the first one-way valve (311), the second end of the fifth pipeline (340) is communicated with the fourth pipeline (330) and is positioned on the upstream side of the second one-way valve (331), and a control valve (341) is arranged on the fifth pipeline (340).

2. The microchannel heat exchanger system of claim 1, wherein,

the first compartment (111) and the second compartment (112) are respectively provided with a through partition board (120);

the through center partition plate (120) is perpendicular to the axis of the first collecting pipe (100), and a through hole is formed in the plate surface of the through center partition plate.

3. The microchannel heat exchanger system of claim 2, wherein,

the through hole is arranged at the center of the through center baffle plate (120).

4. A microchannel heat exchanger system according to any one of claims 1 to 3,

the axial directions of the first header (100) and the second header (200) are parallel to each other, and the second header (200) is vertically arranged;

the third compartment (213), the fourth compartment (214), the fifth compartment (215) and the sixth compartment (216) are sequentially arranged from bottom to top.

5. A microchannel heat exchanger system according to any one of claims 1 to 3,

the number of flat tubes (400) corresponding to the third chamber (213), the fourth chamber (214), the fifth chamber (215) and the sixth chamber (216) is the same or different.

6. The microchannel heat exchanger system of claim 5, wherein,

the number of flat tubes (400) corresponding to the third compartment (213) is equal to the number of flat tubes (400) corresponding to the fifth compartment (215).

7. The microchannel heat exchanger system of claim 5, wherein,

the number of flat tubes (400) corresponding to the fourth compartment (214) is equal to the number of flat tubes (400) corresponding to the sixth compartment (216).

8. The microchannel heat exchanger system of claim 1, wherein,

when the heat exchanger is used as an evaporator, refrigerant flows in from the first pipeline (300), and the control valve (341) is closed.

9. A microchannel heat exchanger system according to claim 1 or 2, wherein,

when the heat exchanger is used as a condenser, the refrigerant flows in from the second pipeline (310), and the control valve (341) is opened.

10. An air conditioning system comprising a microchannel heat exchanger system according to any one of claims 1 to 9.

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