CN216744999U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a heat exchanger which comprises a first main pipeline, a second main pipeline, a first heat exchange passage, a second heat exchange passage, a first bypass pipeline, a second bypass pipeline, a third bypass pipeline and a fourth bypass pipeline. Wherein the first to fourth bypass pipelines are respectively provided with a one-way valve. When the refrigerant enters the heat exchanger from the first main pipeline for circulation, the refrigerant in the heat exchanger circulates in the heating flow direction, so that the circulation path of the refrigerant in the heat exchanger can be effectively shortened, and the rapid circulation of the refrigerant is facilitated; when the refrigerant enters the heat exchanger from the second main pipeline for circulation, the refrigerant in the heat exchanger circulates in a refrigerating flow direction, so that the circulation path and the circulation time of the refrigerant in the heat exchanger can be prolonged, and the pressure drop in the heat exchanger is reduced. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

The priority of chinese patent application entitled "dispenser, check valve, heat exchanger, refrigeration cycle system, air conditioner," filed in 2021, No. 9/19, application No. 202122281454.9, is hereby incorporated by reference in its entirety.

Technical Field

The application relates to the technical field of air conditioners, for example to a heat exchanger and an air conditioner.

Background

At present, an air conditioner generally comprises a refrigerant circulation loop consisting of a compressor, an outdoor heat exchanger, a throttling device, a four-way valve and an indoor heat exchanger, and the flow direction of a refrigerant in the refrigerant circulation loop is changed by the four-way valve, so that the refrigeration function and the heating function of the air conditioner are respectively realized.

The heat exchanger is downward in heating flow, a refrigerant in a heat exchange tube is positioned in a high-temperature and high-pressure area and is insensitive to pressure drop, and the heat transfer performance is mainly influenced by a heat transfer coefficient, so that the heat exchange tube is suitable for adopting fewer branches to accelerate circulation and increase the heat transfer coefficient; the heat exchanger has downward refrigerating flow, the refrigerant in the heat exchange tube is in a low-temperature and low-pressure area, and the heat transfer performance is mainly constrained by the heat transfer coefficient and the pressure drop, so that the heat exchange tube is suitable for adopting more branches, the heat transfer coefficient is ensured, and the pressure drop is greatly reduced to improve the system pressure.

The prior art discloses a heat exchanger, and this heat exchanger adopts shunt tubes or shunt to carry out the reposition of redundant personnel design to make the heat exchanger more branches of refrigerant flow through downwards at the refrigeration flow, prolonged the circulation route of refrigerant, reduced the pressure drop, promoted the heat exchanger and made the downward performance of refrigeration flow.

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 heat exchanger is downward in heating flow, the flow direction of the refrigerant circulation loop is changed, at the moment, the refrigerant needs to reversely flow along a downward flow path of the refrigerant flow of the heat exchanger, at the moment, the flow path is long, the refrigerant is not favorable for quick circulation, and the integral heat exchange efficiency of the air conditioner is reduced.

SUMMERY OF THE UTILITY MODEL

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 to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, which are used for solving the problem of how to enable the heat exchanger to extend a refrigerant flow path downwards in a refrigeration flow direction and shorten the refrigerant flow path downwards in a heating flow direction.

In some embodiments, the heat exchanger comprises:

the first main pipeline is communicated with the first shunt element;

the second main pipeline is communicated with the second shunt element;

a first heat exchange passage, a first end of which is communicated with the third flow dividing element and a second end of which is communicated with the second flow dividing element; a fourth shunting element, a fifth shunting element and a sixth shunting element are sequentially arranged on the first heat exchange passage along the direction towards the second shunting element; wherein the third flow dividing element is in communication with the first flow dividing element;

a first end of the second heat exchange passage is communicated with the seventh flow dividing element, and a second end of the second heat exchange passage is communicated with the second flow dividing element; an eighth flow dividing element, a ninth flow dividing element and a tenth flow dividing element are sequentially arranged on the second heat exchange passage along the direction towards the second flow dividing element; wherein the seventh flow dividing element is communicated with the first flow dividing element;

a first bypass pipeline, wherein a first end of the first bypass pipeline is communicated with the fifth flow dividing element, and a second end of the first bypass pipeline is communicated with the third flow dividing element;

a first end of the second bypass pipeline is communicated with the sixth flow dividing element, and a second end of the second bypass pipeline is communicated with the fourth flow dividing element;

a first end of the third bypass pipeline is communicated with the ninth flow dividing element, and a second end of the third bypass pipeline is communicated with the seventh flow dividing element;

a fourth bypass line, a first end of which is communicated with the tenth flow dividing element, and a second end of which is communicated with the eighth flow dividing element;

a first check valve provided in the first bypass line, and a direction of conduction of the first check valve is defined to flow from the fifth branching element to the third branching element;

the second one-way valve is arranged in the second bypass pipeline, and the conduction direction of the second one-way valve is limited to flow from the sixth flow dividing element to the fourth flow dividing element;

a third check valve disposed in the third bypass line, and a direction of conduction of the third check valve is defined to flow from the ninth flow dividing element to the seventh flow dividing element;

and the fourth check valve is arranged on the fourth bypass pipeline, and the conduction direction of the fourth check valve is limited to be from the tenth shunting element to the eighth shunting element.

Optionally, a portion of the first heat exchange passage between the third flow dividing element and the sixth flow dividing element comprises:

the heat exchange tubes form a zigzag refrigerant flow path.

Optionally, a portion of the first heat exchange passage between the sixth flow-dividing element and the second flow-dividing element comprises:

the heat exchange tubes form a U-shaped refrigerant flow path with an opening facing or a downward opening.

Optionally, a portion of the second heat exchange passage between the seventh flow-splitting element and the tenth flow-splitting element includes:

the heat exchange tubes form a zigzag refrigerant flow path.

Optionally, the portion of the second heat exchange passage between the tenth flow element and the second flow dividing element comprises:

the heat exchange tubes form a U-shaped refrigerant circulation path with an opening facing or a downward opening.

Optionally, the first heat exchange passage is located above the second heat exchange passage.

Optionally, the heat exchanger further includes a casing, a tube plate is disposed in the casing, and the heat exchange tubes respectively included in the first heat exchange path and the second heat exchange path are fixed to the casing through the tube plate.

Optionally, the first bypass pipeline and the second bypass pipeline are respectively arranged at two sides of the casing; and/or the presence of a gas in the gas,

the third bypass pipeline and the fourth bypass pipeline are respectively arranged on two sides of the shell.

The air conditioner comprises a refrigerant circulating loop at least composed of an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve; wherein the indoor heat exchanger and/or the outdoor heat exchanger is/are the heat exchanger described in any of the above embodiments.

Optionally, the outdoor heat exchanger is the heat exchanger;

in a cooling mode, the first main pipeline of the outdoor heat exchanger is communicated with the exhaust port of the compressor, and the second main pipeline of the outdoor heat exchanger is communicated with the indoor heat exchanger;

in the heating mode, the second main pipeline of the outdoor heat exchanger is communicated with the indoor heat exchanger, and the first main pipeline of the outdoor heat exchanger is communicated with the air suction port of the compressor.

The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

when the refrigerant enters the first flow dividing element from the first main pipeline, the refrigerant in the heat exchanger flows in a heating flow direction, and the flow path of the refrigerant comprises a first heat exchange path and a second heat exchange path. Therefore, the circulation path of the refrigerant in the heat exchanger is effectively shortened, the rapid circulation of the refrigerant is facilitated, and the performance of the heat exchanger is improved.

When the refrigerant enters the second flow dividing element from the second main pipeline, the refrigerant in the heat exchanger circulates in a refrigerating flow direction, the circulation path of the refrigerant comprises a first heat exchange path, a second heat exchange path, a first bypass pipeline, a second bypass pipeline, a third bypass pipeline and a fourth bypass pipeline, the first heat exchange path, the first bypass pipeline and the second bypass pipeline form a first parallel path, the second heat exchange path, the third bypass pipeline and the fourth bypass pipeline form a second parallel path, and the first parallel path and the second parallel path form a third parallel path. Therefore, the circulation path and the circulation time of the refrigerant in the heat exchanger are effectively prolonged, the pressure drop in the heat exchanger is reduced, and the performance of the heat exchanger is 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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic diagram of a refrigerant circulation circuit according to an embodiment of the disclosure;

FIG. 2 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure;

fig. 3 is a schematic view of a refrigerant flow path of a heat exchanger in a downward heating flow direction according to an embodiment of the disclosure;

fig. 4 is a schematic diagram of a refrigerant flow path of the heat exchanger provided in the embodiment of the present disclosure in which a refrigerant flows downward;

fig. 5 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the disclosure.

Reference numerals:

100: a first main pipeline; 101: a first branch line; 102: a second branch pipe; 110: a second main pipeline;

200: a first heat exchange section; 210: a second heat exchange section; 220: a third heat exchange section; 230: a fourth heat exchange section;

300: a first bypass line; 310: a second bypass line; 320: a third bypass line; 330: a fourth bypass line;

400: a first check valve; 410: a second one-way valve; 420: a third check valve; 430: a fourth check valve;

500: a first shunt element; 510: a second flow dividing element; 520: a third flow dividing element; 530: a fourth shunt element; 540: a fifth flow dividing element; 550: a sixth shunt element; 560: a seventh shunt element; 570: an eighth shunt element; 580: a ninth shunt element; 590: a tenth flow element;

600: a compressor; 610: an outdoor heat exchanger; 620: an indoor heat exchanger; 630: a throttling device.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can 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. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

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

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

A refrigerant circulation circuit of an air conditioner is generally composed of a compressor 600, an outdoor heat exchanger 610, a throttle device 630, an indoor heat exchanger 620, and a four-way valve for changing a flow direction of a refrigerant in the refrigerant circulation circuit. When the air conditioner operates in a cooling mode, a refrigerant discharged from the compressor 600 passes through the outdoor heat exchanger 610, the throttling device 630 and the indoor heat exchanger 620 in sequence through the four-way valve, and finally returns to the compressor 600 to be compressed again. When the air conditioner operates in a heating mode, a refrigerant discharged from the compressor 600 passes through the indoor heat exchanger 620, the throttling device 630 and the outdoor heat exchanger 610 in sequence through the four-way valve, and finally returns to the compressor 600 to be compressed again.

As shown in fig. 1 to 5, an embodiment of the present disclosure provides a heat exchanger, which includes a first main pipe 100, a second main pipe 110, a first heat exchange path, a second heat exchange path, a first bypass line 300, a second bypass line 310, a third bypass line 320, a fourth bypass line 330, a first check valve 400, a second check valve 410, a third check valve 420, and a fourth check valve 430. Wherein, the first main pipeline 100 is communicated with the first shunt element 500; second main conduit 110 communicates with second shunt element 510; the first end of the first heat exchange channel is communicated with the third flow dividing element 520, and the second end of the first heat exchange channel is communicated with the second flow dividing element 510; a fourth flow dividing element 530, a fifth flow dividing element 540 and a sixth flow dividing element 550 are sequentially arranged on the first heat exchange passage along the direction facing the second flow dividing element 510; wherein the third dividing element 520 is in communication with the first dividing element 500; a first end of the second heat exchange passage is communicated with the seventh flow dividing element 560, and a second end of the second heat exchange passage is communicated with the second flow dividing element 510; an eighth flow dividing element 570, a ninth flow dividing element 580 and a tenth flow dividing element 590 are sequentially arranged on the second heat exchange passage along the direction facing the second flow dividing element 510; wherein the seventh shunt element 560 is in communication with the first shunt element 500; the first end of the first bypass line 300 is connected to the fifth flow dividing element 540, and the second end thereof is connected to the third flow dividing element 520; a first end of the second bypass line 310 is communicated with the sixth flow dividing element 550, and a second end thereof is communicated with the fourth flow dividing element 530; a first end of the third bypass line 320 is communicated with the ninth flow dividing element 580, and a second end thereof is communicated with the seventh flow dividing element 560; a first end of the fourth bypass line 330 is connected to the tenth flow dividing element 590, and a second end thereof is connected to the eighth flow dividing element 570; the first check valve 400 is disposed in the first bypass line 300, and a direction of conduction of the first check valve 400 is defined to flow from the fifth shunting element 540 to the third shunting element 520; a second check valve 410 is disposed in the second bypass line 310, and a direction of conduction of the second check valve 410 is defined as flowing from the sixth shunting element 550 to the fourth shunting element 530; the third check valve 420 is disposed in the third bypass line 320, and a communication direction of the third check valve 420 is defined as flowing from the ninth shunt element 580 to the seventh shunt element 560; a fourth check valve 430 is disposed in the fourth bypass line 330, and a communication direction of the fourth check valve 430 is defined to flow from the tenth flow dividing element 590 to the eighth flow dividing element 570.

With the heat exchanger provided in the embodiment of the present disclosure, when the refrigerant enters the first flow dividing element 500 from the first main pipeline 100, the refrigerant in the heat exchanger flows in the heating flow direction, as shown in fig. 3. First, the refrigerant in the first flow dividing element 500 is divided into two paths to flow to the third flow dividing element 520 and the seventh flow dividing element 560 respectively. Then, under the action of the one-way conduction of the first check valve 400 and the second check valve 410, the refrigerant in the third flow dividing element 520 can enter the second flow dividing element 510 only through the first heat exchange path. Meanwhile, under the unidirectional conduction action of the third check valve 420 and the fourth check valve 430, the refrigerant in the seventh flow dividing element 560 can only enter the second flow dividing element 510 through the second heat exchange passage. Finally, the refrigerant in the second flow dividing element 510 flows out through the second main pipe 110.

When the refrigerant enters the second dividing element 510 from the second main pipe 110, the refrigerant in the heat exchanger flows in a cooling flow direction, as shown in fig. 4. First, the refrigerant in the second flow dividing element 510 is divided into two paths to flow to the sixth flow dividing element 550 and the tenth flow dividing element 590, respectively. Then, the refrigerant in the sixth flow dividing element 550 is divided into two paths, one path flows to the fifth flow dividing element 540 through the first heat exchanging path, and the other path flows to the fourth flow dividing element 530 through the second bypass line 310. Then, the refrigerant in the fifth flow dividing element 540 is divided into two paths, one path flows to the fourth flow dividing element 530 through the first heat exchange path, and the other path flows to the third flow dividing element 520 through the first bypass line 300. The refrigerant in the fourth flow dividing element 530 flows to the third flow dividing element 520. The refrigerant in the third flow dividing element 520 then flows to the first flow dividing element 500. Meanwhile, the refrigerant in the tenth flow dividing element 590 is divided into two paths, one path flows to the ninth flow dividing element 580 through the second heat exchanging path, and the other path flows to the eighth flow dividing element 570 through the fourth bypass line 330. Then, the refrigerant in the ninth shunting element 580 is divided into two paths, one path flows to the eighth shunting element 570 through the second heat exchanging channel, and the other path flows to the seventh shunting element 560 through the third bypass line 320. The refrigerant in the eighth flow dividing element 570 flows to the seventh flow dividing element 560. Then, the refrigerant in the seventh flow dividing element 560 flows to the first flow dividing element 500. Finally, the refrigerant in the first flow dividing element 500 flows out through the first main pipe 100.

The heat exchanger flows downwards in the refrigeration process, the circulation path of the refrigerant comprises a first heat exchange path, a second heat exchange path, a first bypass path 300, a second bypass path 310, a third bypass path 320 and a fourth bypass path 330, the first heat exchange path, the first bypass path 300 and the second bypass path 310 form a first parallel path, the second heat exchange path, the third bypass path 320 and the fourth bypass path 330 form a second parallel path, and the first parallel path and the second parallel path form a third parallel path. Therefore, the circulation path and the circulation time of the refrigerant in the heat exchanger are effectively prolonged, the pressure drop in the heat exchanger is reduced, and the performance of the heat exchanger is improved. The heat exchanger is downward in heating flow, and the circulation path of refrigerant includes first heat transfer route, second heat transfer route. Therefore, the circulation path of the refrigerant in the heat exchanger is effectively shortened, the rapid circulation of the refrigerant is facilitated, and the performance of the heat exchanger is improved.

In some embodiments, the first flow dividing element 500 to the tenth flow dividing element 590 are each a refrigerant distributor.

In some embodiments, the heat exchange tubes contained in the first heat exchange passage and the second heat exchange passage are copper tubes. The copper pipe has excellent heat-conducting property, so that the refrigerant can better exchange heat with the external environment when circulating inside the heat exchange pipe.

In some embodiments, the heat exchange tubes contained in the first heat exchange passage and the second heat exchange passage are provided with heat exchange fins. Therefore, the heat exchange area of the heat exchange tube can be increased and the heat exchange efficiency of the refrigerant can be improved by arranging the heat exchange fins.

In some embodiments, the third flow dividing element 520 is in communication with the first flow dividing element 500 through a first branch line 101, and the seventh flow dividing element 560 is in communication with the first flow dividing element 500 through a second branch line 102; wherein the height of the first branch pipe 101 is greater than the height of the second branch pipe 102.

In some embodiments, the heat exchanger further includes a casing, a tube plate is disposed in the casing, and the heat exchange tubes included in the first heat exchange path and the second heat exchange path are fixed in the casing through the tube plate.

Optionally, the first heat exchange passage is located above the second heat exchange passage.

Optionally, the height of the first shunt element 500 is greater than the height of the second shunt element 510.

Further, optionally, the first shunt element 500 is arranged on the left side of the chassis and the second shunt element 510 is arranged on the right side of the chassis.

Optionally, the first bypass pipeline 300 and the second bypass pipeline 310 are respectively disposed at two sides of the casing; and/or the third bypass pipeline 320 and the fourth bypass pipeline 330 are respectively arranged at two sides of the casing.

Illustratively, the first bypass line 300 and the third bypass line 320 are disposed at the right side of the cabinet, and the second bypass line 310 and the fourth bypass line 330 are disposed at the left side of the cabinet.

In some embodiments, a portion of the first heat exchange path between the third flow dividing element 520 and the sixth flow dividing element 550 includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes form a zigzag refrigerant flow path.

Exemplarily, as shown in fig. 5, a portion of the first heat exchange path between the third flow dividing element 520 and the sixth flow dividing element 550 is referred to as a first heat exchange section 200, and the first heat exchange section 200 is a zigzag refrigerant flow path composed of 18 heat exchange tubes, where the number of the heat exchange tubes on the left side of the first heat exchange section 200 is 10, and the number of the heat exchange tubes on the right side is 8. Wherein the front end of the first heat exchange tube at the left side is communicated with the third shunting element 520, and the rear end of the first heat exchange tube at the left side is communicated with the rear end of the second heat exchange tube at the left side. The front end of the second heat exchange tube on the left side is communicated with the front end of the first heat exchange tube on the right side, and the rear end of the first heat exchange tube on the right side is communicated with the rear end of the second heat exchange tube on the right side. The front end of the second heat exchange tube on the right side is communicated with the front end of the third heat exchange tube on the left side. All the heat exchange tubes of the first heat exchange section 200 are sequentially communicated through the hairpin tube according to the above connection manner, thereby forming a zigzag refrigerant circulation path.

In some embodiments, a portion of the first heat exchange path between the sixth flow dividing element 550 and the second flow dividing element 510 includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes form a U-shaped refrigerant flow path with an opening facing or a downward opening.

Exemplarily, a portion of the first heat exchange passage between the sixth flow dividing element 550 and the second flow dividing element 510 is referred to as a second heat exchange section 210, the second heat exchange section 210 is a U-shaped refrigerant circulation path with an upward opening formed by 6 heat exchange tubes, wherein the number of the heat exchange tubes on the left side of the second heat exchange passage is 2, and the adjacent heat exchange tubes are communicated through hairpin tubes; the number of the heat exchange tubes on the right side of the second heat exchange passage is 4, and the adjacent heat exchange tubes are communicated through the hairpin tube. The first heat exchange tube at the lower part of the left side of the second heat exchange passage is communicated with the first heat exchange tube at the lower part of the right side of the second heat exchange passage through the hairpin tube, the first heat exchange tube at the upper part of the left side of the second heat exchange passage is communicated with the sixth flow dividing element 550, and the first heat exchange tube at the upper part of the right side of the second heat exchange passage is communicated with the second flow dividing element 510, so that a U-shaped refrigerant circulation path with an upward opening is formed.

In some embodiments, a portion of the second heat exchange path between the seventh diverging element 560 and the tenth diverging element 590 includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes form a zigzag refrigerant flow path.

Exemplarily, as shown in fig. 5, a portion of the second heat exchange path between the seventh flow dividing element 560 and the tenth flow dividing element 590 is referred to as a third heat exchange section 220, and the third heat exchange section 220 is a zigzag refrigerant flow path composed of 18 heat exchange tubes, where the number of the heat exchange tubes on the left side of the third heat exchange section 220 is 10, and the number of the heat exchange tubes on the right side is 8. Wherein the front end of the first heat exchange tube at the left side is communicated with the seventh flow dividing element 560, and the rear end of the first heat exchange tube at the left side is communicated with the rear end of the second heat exchange tube at the left side. The front end of the second heat exchange tube on the left side is communicated with the front end of the first heat exchange tube on the right side, and the rear end of the first heat exchange tube on the right side is communicated with the rear end of the second heat exchange tube on the right side. The front end of the second heat exchange tube on the right side is communicated with the front end of the third heat exchange tube on the left side. All the heat exchange tubes of the third heat exchange section 220 are sequentially communicated through the hairpin tube according to the above connection manner, thereby forming a zigzag refrigerant circulation path.

In some embodiments, a portion of the second heat exchange path between the tenth flow element 590 and the second flow dividing element 510 includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes form a U-shaped refrigerant flow path with an opening facing or a downward opening.

Exemplarily, a portion of the second heat exchange passage between the tenth flow element 590 and the second flow dividing element 510 is referred to as a fourth heat exchange segment 230, the fourth heat exchange segment 230 is a U-shaped refrigerant flow path with an upward opening formed by 6 heat exchange tubes, wherein the number of the heat exchange tubes on the left side of the second heat exchange passage is 2, and the adjacent heat exchange tubes are communicated through hairpin tubes; the number of the heat exchange tubes on the right side of the second heat exchange passage is 4, and the adjacent heat exchange tubes are communicated through the hairpin tube. The first heat exchange tube at the lower part of the left side of the second heat exchange passage is communicated with the first heat exchange tube at the lower part of the right side of the second heat exchange passage through a hairpin tube, the first heat exchange tube at the upper part of the left side of the second heat exchange passage is communicated with the tenth flow element 590, and the first heat exchange tube at the upper part of the right side of the second heat exchange passage is communicated with the second flow splitting element 510, so that a U-shaped refrigerant circulation path with an upward opening is formed.

The embodiment of the present disclosure further provides an air conditioner, and the indoor heat exchanger 620 and/or the outdoor heat exchanger 610 are/is the heat exchanger described in any of the above embodiments.

Optionally, the outdoor heat exchanger 610 is the heat exchanger described in any of the above embodiments.

In the cooling mode of the air conditioner, the outdoor heat exchanger 610 serves as a condenser, the first main line 100 of the outdoor heat exchanger 610 is communicated with the exhaust port of the compressor 600 through the four-way valve, and the second main line 110 of the outdoor heat exchanger 610 is communicated with the indoor heat exchanger 620. The refrigerant discharged from the compressor 600 through the discharge port enters the first flow dividing element 500 from the first main line 100, and at this time, the refrigerant in the exterior heat exchanger 610 flows in the heating flow direction. Therefore, the circulation path of the refrigerant in the air conditioner is shortened, and the rapid circulation of the refrigerant is facilitated.

In the heating mode of the air conditioner, the outdoor heat exchanger 610 serves as an evaporator, and the indoor heat exchanger 620 is connected to an exhaust port of the compressor 600 through a four-way valve. At this time, the second main pipe 110 of the outdoor heat exchanger 610 communicates with the indoor heat exchanger 620, and the first main pipe 100 of the outdoor heat exchanger 610 communicates with the suction port of the compressor 600. The refrigerant discharged from the compressor 600 through the discharge port passes through the indoor heat exchanger 620 and enters the second main line 110 of the outdoor heat exchanger 610, and the refrigerant enters the second flow dividing element 510 through the second main line 110, at this time, the refrigerant in the outdoor heat exchanger 610 flows in a cooling flow direction. Therefore, the circulation path and the circulation time of the refrigerant in the air conditioner are prolonged, the pressure drop in the air conditioner is reduced, and the performance in the air conditioner is improved.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify 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 heat exchanger, comprising:

the first main pipeline is communicated with the first shunt element;

the second main pipeline is communicated with the second shunt element;

a first heat exchange passage, a first end of which is communicated with the third flow dividing element, and a second end of which is communicated with the second flow dividing element; a fourth shunting element, a fifth shunting element and a sixth shunting element are sequentially arranged on the first heat exchange passage along the direction towards the second shunting element; wherein the third flow dividing element is in communication with the first flow dividing element;

a first end of the second heat exchange passage is communicated with the seventh flow dividing element, and a second end of the second heat exchange passage is communicated with the second flow dividing element; an eighth flow dividing element, a ninth flow dividing element and a tenth flow dividing element are sequentially arranged on the second heat exchange passage along the direction towards the second flow dividing element; wherein the seventh flow dividing element is communicated with the first flow dividing element;

a first bypass pipeline, wherein a first end of the first bypass pipeline is communicated with the fifth flow dividing element, and a second end of the first bypass pipeline is communicated with the third flow dividing element;

a first end of the second bypass pipeline is communicated with the sixth flow dividing element, and a second end of the second bypass pipeline is communicated with the fourth flow dividing element;

a first end of the third bypass pipeline is communicated with the ninth flow dividing element, and a second end of the third bypass pipeline is communicated with the seventh flow dividing element;

a fourth bypass line, a first end of which is communicated with the tenth flow dividing element, and a second end of which is communicated with the eighth flow dividing element;

a first check valve provided in the first bypass line, and a direction of conduction of the first check valve is defined to flow from the fifth branching element to the third branching element;

a second check valve disposed in the second bypass line, and a direction of conduction of the second check valve is defined to flow from the sixth shunting element to the fourth shunting element;

a third check valve disposed in the third bypass line, and a direction of conduction of the third check valve is defined to flow from the ninth flow dividing element to the seventh flow dividing element;

and the fourth check valve is arranged on the fourth bypass pipeline, and the conduction direction of the fourth check valve is limited to be from the tenth shunting element to the eighth shunting element.

2. The heat exchanger of claim 1, wherein the portion of the first heat exchange path between the third flow dividing element and the sixth flow dividing element comprises:

the heat exchange tubes form a zigzag refrigerant flow path.

3. The heat exchanger according to claim 1 or 2, wherein the portion of the first heat exchange path between the sixth flow dividing element and the second flow dividing element comprises:

the heat exchange tubes form a U-shaped refrigerant flow path with an opening facing or a downward opening.

4. The heat exchanger according to claim 1 or 2, wherein a portion of the second heat exchange path between the seventh flow dividing element and the tenth flow element comprises:

the heat exchange tubes form a zigzag refrigerant flow path.

5. The heat exchanger according to claim 1 or 2, wherein a portion of the second heat exchange path between the tenth flow element and the second flow dividing element comprises:

the heat exchange tubes form a U-shaped refrigerant flow path with an opening facing or a downward opening.

6. The heat exchanger of claim 1 or 2, wherein the first heat exchange pass is located above the second heat exchange pass.

7. The heat exchanger according to claim 1 or 2, further comprising a casing, wherein a tube plate is provided in the casing, and the heat exchange tubes included in the first heat exchange path and the second heat exchange path are fixed to the casing through the tube plate.

8. The heat exchanger of claim 7, wherein the first bypass line and the second bypass line are disposed on both sides of the cabinet, respectively; and/or the presence of a gas in the gas,

the third bypass pipeline and the fourth bypass pipeline are respectively arranged on two sides of the shell.

9. An air conditioner comprising a refrigerant circulation circuit constructed by at least an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve, wherein the indoor heat exchanger and/or the outdoor heat exchanger is the heat exchanger as recited in any one of claims 1 to 8.

10. The air conditioner according to claim 9, wherein the outdoor heat exchanger is the heat exchanger;

in a cooling mode, the first main pipeline of the outdoor heat exchanger is communicated with the exhaust port of the compressor, and the second main pipeline of the outdoor heat exchanger is communicated with the indoor heat exchanger;

in the heating mode, the second main pipeline of the outdoor heat exchanger is communicated with the indoor heat exchanger, and the first main pipeline of the outdoor heat exchanger is communicated with the air suction port of the compressor.

Images