CN115993000A - Heat exchanger and heat exchange system - Google Patents

Abstract

The application provides a heat exchanger and heat transfer system, the heat exchanger includes first pipe, second pipe and a plurality of heat exchange tube, and a plurality of heat exchange tube intercommunication first pipe and second pipe, first pipe includes: the first channel, first piece, the second piece, the third piece, first chamber and first hole, first channel encircles the setting, the second piece is located between first piece and the third piece, first chamber is located between second piece and the third piece, first chamber and heat exchange tube intercommunication, first chamber includes a plurality of first subchambers that set up along first tube length direction, each first subchamber each other does not communicate, first hole is provided with a plurality ofly, first hole runs through the second piece along the thickness direction of first tube, at least one first hole and a first subchamber intercommunication, first channel communicates with first chamber through a plurality of first holes. The refrigerant flows circularly in the first channel after entering the first channel and enters the heat exchange tube along the first hole and the first cavity, and the heat exchanger is favorable for finely adjusting the distribution of the refrigerant, so that the heat exchange efficiency of the heat exchanger is improved.

Description

Heat exchanger and heat exchange system

[ field of technology ]

The invention relates to the technical field of heat exchange, in particular to a heat exchanger and a heat exchange system.

[ background Art ]

In the related art, in an air conditioner heat exchange system, refrigerant entering a heat exchanger enters each heat exchange tube through different flowing distances to exchange heat, when the number of the heat exchange tubes is large, the difference of the on-way resistance of the refrigerant reaching each heat exchange tube is large, so that the phenomenon of uneven distribution of the refrigerant in each heat exchange tube is caused, and the heat exchange performance of the heat exchange tubes is affected. If the refrigerant enters the heat exchanger in a gas-liquid two-phase state, the refrigerant can be separated from the liquid-phase refrigerant, so that the refrigerant entering each heat exchange tube is further unevenly distributed, and the heat exchange efficiency of the heat exchanger is reduced.

[ invention ]

According to the heat exchanger, the distribution of refrigerant is adjusted in the heat exchanger, and heat exchange efficiency of the heat exchanger is improved.

In one aspect, the application provides a heat exchanger, the heat exchanger includes first pipe, second pipe and a plurality of heat exchange tube, the heat exchange tube with first pipe is direct or indirect connection, the heat exchange tube with second pipe is direct or indirect connection, first pipe includes: the first channel comprises a first sub-channel and a second sub-channel, the first sub-channel is arranged along the length direction of the first pipe, the second sub-channel is arranged along the length direction of the first pipe, the first sub-channel and the second sub-channel are arranged at intervals along the width direction of the first pipe, the first channel further comprises a third sub-channel, and the third sub-channel is communicated with the first sub-channel and the second sub-channel; a first member, a second member and a third member, the second member being located between the first member and the third member in a thickness direction of the first tube, the third member being directly or indirectly connected to the heat exchange tube; a first cavity, a wall surrounding the first cavity comprising the second piece and the third piece; the first cavity comprises a plurality of first subchambers, the plurality of first subchambers are arranged at intervals along the length direction of the first pipe, and two adjacent first subchambers in the length direction of the first pipe are not directly communicated; the minimum length of at least one first subchamber in the length direction of the first pipe is L1, and the minimum length of at least one other first subchamber in the length direction of the first pipe is L2, wherein L2 is greater than or equal to L1; the second member further includes a plurality of first apertures extending through the second member, at least one of the first apertures in communication with one of the first subchambers; the first sub-channel communicates with the first cavity via a plurality of the first holes and/or the second sub-channel communicates with the first cavity via a plurality of the first holes. When the heat exchanger works, refrigerant enters the first pipe and then flows circularly in the first channel formed by the first sub-channel, the second sub-channel and the third sub-channel, enters the first cavity along the first hole and then enters the heat exchange pipe through each first sub-cavity, and the structure is beneficial to regulating the distribution of the refrigerant, so that the heat exchange efficiency of the heat exchanger is improved.

In some embodiments, the heat exchanger further comprises a third tube, the first channel further comprises a fifth sub-channel, the fifth sub-channel is in communication with the first sub-channel, the fifth sub-channel comprises a first opening, the first opening is in communication with the third tube, and a portion of the fifth sub-channel has a cross-sectional flow area that is smaller than a cross-sectional flow area of other portions of the fifth sub-channel.

In some embodiments, the first member has a boss having a length in a length direction of the first tube, the first member is fixedly connected to the second member, a wall partially surrounding the first channel includes the boss, the second member includes another portion of the wall of the first channel, the second member includes a plurality of first holes spaced apart in the length direction of the first tube, the first tube further includes a plurality of first plates spaced apart in the length direction of the first tube, the plurality of first plates divide the first chamber into a plurality of first subchambers, and the third member is fixedly connected to the second member.

In some embodiments, a portion of the cross-sectional flow area of the fifth sub-channel is less than a cross-sectional flow area of other portions of the fifth sub-channel.

In some embodiments, the third member further comprises a plurality of engagement portions spaced apart along the length of the first tube, the engagement portions abutting the first member.

In some embodiments, a plurality of the first holes are provided in the second member in the length direction of the first tube, a part of the first holes communicate with the first sub-channel, and a part of the first holes communicate with the second sub-channel.

In some embodiments, the first tube further comprises a fourth piece extending along the length of the first tube, the fourth piece extending in the thickness of the first tube, the fourth piece comprising a plurality of slots spaced apart along the length of the first tube, at least a portion of the fourth piece being positioned within the first cavity.

In some embodiments, the first channel further comprises a fourth sub-channel, the fourth sub-channel communicating the first sub-channel and the second sub-channel.

In some embodiments, the first tube further comprises a plurality of fourth tubes, one end of the fourth tubes communicating with the first channel, the other end of the fourth tubes communicating with the first bore, the fourth tubes communicating with the first channel and the first subchamber.

In some embodiments, the first member comprises an annular tube comprising a first sub-channel, a second sub-channel, a third sub-channel and a fourth sub-channel, a plurality of the fourth tubes being spaced apart along the length of the first tube, at least a portion of one end of the fourth tube being in communication with the first sub-channel and another end of the fourth tube being in communication with the first aperture.

In some embodiments, another portion of the fourth tube has one end in communication with the second sub-channel and another end in communication with the first bore.

In some embodiments, the cross-sectional area of the first sub-channel is greater than the cross-sectional area of the second sub-channel in at least one cross-section of the first tube.

In some embodiments, the flow area of the first sub-channel increases and/or the cross-sectional area of the second sub-channel decreases along the length of the first tube.

According to a further aspect of the present application there is also provided a heat exchange system comprising a heat exchanger according to any of the preceding claims, so naturally having the advantages of the heat exchanger described above, said heat exchanger comprising: the first pipe and the second pipe are arranged at intervals, the length direction of the first pipe is parallel to the vertical direction or is angled with the vertical direction, the angle is not equal to 90 degrees, and the length of at least one first subchamber positioned above is smaller than the length of the other first subchamber positioned below in the vertical direction;

the heat exchange tubes are arranged at intervals along the length direction of the first tube, each heat exchange tube comprises a plurality of channels arranged at intervals along the length direction of the heat exchange tube, the channels are arranged at intervals along the width direction of the heat exchange tube, and the heat exchange tubes are communicated with the first tube and the second tube;

the fins are connected with the heat exchange tubes, part of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube, and the fins are multiple.

Additional features and advantages in accordance with embodiments of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the application. The objects and other advantages of embodiments according to the present application are realized and attained by the structure particularly pointed out in the written description and drawings.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of a heat exchanger according to an embodiment of the present application;

FIG. 2 is an assembled schematic view of a first tube of a heat exchanger according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a heat exchanger provided in an embodiment of the present application;

FIG. 4 is a schematic view of a first member according to an embodiment of the present application;

FIG. 5 is a schematic view of the structure of a first tube of a heat exchanger according to one embodiment of the present application;

FIG. 6 is a schematic view of a first tube of a heat exchanger according to another embodiment of the present application;

FIG. 7 is a schematic view of a first tube of a heat exchanger according to yet another embodiment of the present application;

FIG. 8 is a schematic view of a first tube of a heat exchanger according to yet another embodiment of the present application;

FIG. 9 is a schematic view of a first tube of a heat exchanger according to yet another embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of a heat exchanger according to yet another embodiment of the present application;

FIG. 11 is a schematic view of a first member according to an embodiment of the present application;

fig. 12 is a schematic structural view of still another first member according to an embodiment of the present application.

Reference numerals:

100. a heat exchanger; 1. a first tube; 11. a first channel; 111. a first sub-channel; 112. a second sub-channel; 113. a third sub-channel; 114. a fourth sub-channel; 115. a fifth sub-channel; 116. a first opening; 12. a first member; 121. a boss; 122. an annular tube; 13. a second piece; 14. a third piece; 141. a joint; 15. a first chamber; 151. a first subchamber; 16. a first hole; 17. a first plate; 18. a fourth piece; 181. a slot hole; 2. a second tube; 3. a heat exchange tube; 4. a third tube; 5. a fourth pipe; 6. and (3) a fin.

[ detailed description ] of the invention

For a better understanding of the technical solutions according to the present application, embodiments according to the present application are described in detail below with reference to the accompanying drawings.

It should be understood that the embodiments described are merely examples in accordance with some, but not all, of the present application. All other embodiments, based on the embodiments according to the application, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of protection according to the application.

The terminology used in the embodiments in accordance with the application is for the purpose of describing particular embodiments only and is not intended to be limiting in accordance with the application. As used in accordance with the embodiments of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like, described according to the embodiments of the present application, are described with the angles shown in the drawings, and should not be construed as limiting the embodiments according to the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The following describes specific embodiments of the heat exchanger according to the structure of the heat exchanger according to the embodiment of the present application.

According to the heat exchanger 100 provided by the application, the first channel 11 is arranged in the heat exchanger 100, refrigerant circularly flows in the first channel 11 after entering the first channel 11 and enters the heat exchange tube 3 along the first hole 16 and the first cavity 15, and the arrangement is that the refrigerant entering the heat exchanger 100 is beneficial to adjusting the refrigerant distribution, so that the heat exchange performance of the heat exchanger 100 is improved.

Referring to fig. 1 to 9, the heat exchanger 100 includes a first tube 1, a second tube 2, and a plurality of heat exchange tubes 3, wherein the plurality of heat exchange tubes 3 are connected to the first tube 1 and the second tube 2, and the heat exchange tubes 3 are directly or indirectly connected to the first tube 1, and the heat exchange tubes 3 are directly or indirectly connected to the second tube 2.

The first tube 1 includes: a first channel 11, a first member 12, a second member 13, a third member 14, a first cavity 15 and a first hole 16, wherein the first channel 11 comprises a first sub-channel 111 and a second sub-channel 112, the first sub-channel 111 is arranged along the length direction of the first pipe 1, the second sub-channel 112 is arranged along the length direction of the first pipe 1, the first sub-channel 111 and the second sub-channel 112 are arranged at intervals in the width direction of the first pipe 1, the first channel 11 further comprises a third sub-channel 113, and the third sub-channel 113 is communicated with the first sub-channel 111 and the second sub-channel 112; the second piece 13 is located between the first piece 12 and the third piece 14 in the thickness direction of the first tube 1, the third piece 14 being directly or indirectly connected to the heat exchange tube 3; the wall surrounding the first cavity 15 comprises the second piece 13 and the third piece 14; the first cavity 15 includes a plurality of first subchambers 151, the plurality of first subchambers 151 are arranged at intervals along the length direction of the first pipe 1, and two adjacent first subchambers 151 in the length direction of the first pipe 1 are not directly communicated; at least one first subchamber 151 has a minimum length L1 in the length direction of the first tube 1, and at least another first subchamber 151 has a minimum length L2 in the length direction of the first tube 1, wherein L2 is equal to or greater than L1; the first holes 16 are provided in plurality, the first holes 16 penetrate through the second piece 13, and at least one first hole 16 is communicated with one first subchamber 151; the first passage 11 communicates with the first chamber 15 via a plurality of the first holes 16.

The first tube 1 and the second tube 2 may also be called header pipes, the heat exchange tube 3 may also be called flat tubes, when the first tube 1 and the second tube 2 are vertically placed, the third tube 4 is installed at the lower end of the first tube and/or the second tube, the refrigerant enters the inner cavity of the first tube 1 through the third tube 4 and then flows into each heat exchange tube 3, the refrigerant flowing out of each heat exchange tube 3 enters the second tube 2, the first tube 1 and the second tube 2 are connected with an external circulation device, and the circulation device conveys the refrigerant in the second tube 2 into the first tube 1, so that the refrigerant circulates in the first tube of the heat exchanger 100.

In the working state of the heat exchanger 100, the first tube 1 and the second tube 2 are generally vertically arranged, the heat exchange tube 3 is generally horizontally arranged, so that the refrigerant entering the first tube 1 is accumulated at the lower part of the inner cavity of the first tube 1 under the action of gravity, so that more refrigerant flows through the heat exchange tube 3 at the lower end of the heat exchanger 100 and less refrigerant flows through the heat exchange tube 3 at the upper end of the heat exchanger 100, in order to make the distribution of the refrigerant among the heat exchange tubes 3 more uniform, referring to fig. 2, the invention arranges a first channel 11 in the first tube 1, the first channel 11 comprises a first sub-channel 111 arranged along the length direction of the first tube 1, a second sub-channel 112 arranged along the length direction of the first tube 1, the first sub-channel 111 and the second sub-channel 112 are arranged at intervals along the width direction of the first tube 1, the first channel 11 further comprises a third sub-channel 113, the third sub-channel 113 is in communication with the first sub-channel 111 and the second sub-channel 112, in some embodiments, the first channel 11 further includes a fourth sub-channel 114, the fourth sub-channel 114 is in communication with the first sub-channel 111 and the second sub-channel 112, in which the first sub-channel 111, the second sub-channel 112, and the third sub-channel 113 are substantially surrounded to form a circulation communication channel, or the first sub-channel 111, the second sub-channel 112, the third sub-channel 113, and the fourth sub-channel 114 are substantially surrounded to form a circulation communication channel, and there is a portion of the circulation communication channel disposed along the length direction of the first tube 1, it should be noted that the first channel 11 may be formed by an internal hollow tube communication, or may be formed by a structure formed by combining the first member 12 and the second member 13, for example, a groove is disposed on the first member 12, and a surface of the first member 12 provided with the groove is attached to the second member 13, the groove naturally closes and forms the first channel 11.

The first tube 1 further comprises a first member 12, a second member 13 and a third member 14, a first cavity 15 is formed between the second member 13 and the third member 14, the first cavity 15 comprises a plurality of first subchambers 151, the first subchambers 151 are isolated from each other, the first subchambers 151 can be communicated with one or more heat exchange tubes 3, a plurality of first holes 16 are formed in the second member 13, the first holes 16 penetrate through the second member 13 along the thickness direction of the first tube 1, at least one first hole 16 is communicated with one first subchamber 151, and the first channel 11 is communicated with the first cavity 15 through the plurality of first holes 16.

At least one first subchamber 151 has a minimum length L1 along the length direction of the first tube 1, and at least another first subchamber 151 has a minimum length L2 along the length direction of the first tube 1, where L2 is greater than or equal to L1, so in some embodiments, referring to fig. 2, the minimum lengths of the plurality of first subchambers 151 along the length direction of the first tube 1 are the same (i.e., L2 is equal to L1), which is beneficial to improving the production efficiency of the heat exchanger 100, and further, is beneficial to adjusting the refrigerant distribution, reducing the refrigerant gas-liquid separation phenomenon, and improving the heat exchange performance of the heat exchanger 100.

Referring to fig. 10, in other embodiments, the minimum lengths of the first subchambers 151 along the length direction of the first tube 1 are different (i.e., L2 is greater than L1), and during operation of the heat exchanger, when the heat exchanger is vertically placed, the refrigerant flowing into the first tube is affected by the pressure and flow rate of the refrigerant, and the gas-liquid two-phase refrigerant is easily separated into two phases, so that by increasing the inner volumes of one or more of the first subchambers 151 in the first tube 1, there is a first subchamber with different inner volumes in the first tube 1, which is further helpful for adjusting the distribution of the refrigerant, thereby improving the heat exchange efficiency of the heat exchanger 100. In summary, a part of the refrigerant after entering the first channel 11 flows into the heat exchange tube 3 along the first hole 16 and the first subchamber 151, another part of the refrigerant flows circularly along the first channel 11, the refrigerant supplied from the outside continuously flows into the first channel 11 and is collected into the circularly flowing refrigerant flow, and the refrigerant also continuously flows into each first subchamber 151 from each first hole 16 and finally flows into each heat exchange tube 3, so that the heat exchanger 100 is helpful for adjusting the distribution of the refrigerant, and the heat exchange efficiency of the heat exchanger 100 is improved.

In some embodiments, the heat exchanger 100 further comprises a third tube 4, the first channel 11 further comprises a fifth sub-channel 115, the fifth sub-channel 115 being in communication with the first sub-channel 111, the fifth sub-channel 115 comprising a first opening 116, the first opening 116 being in communication with the third tube 4.

Referring to fig. 2, the fifth sub-channel 115 is in communication with the first sub-channel 111, the fifth sub-channel 115 can be used as an inlet for flowing refrigerant into the first channel 11, the fifth sub-channel 115 is provided with a first opening 116 and enables the third tube 4 to be in communication with the first opening 116, the third tube 4 is in sealed connection with the first member 12, the sealed connection can be fixedly connected by using various manners such as welding and clamping structures, and the convenience of connecting the first channel 11 with an external refrigerant supply device is improved by arranging the third tube 4.

In some embodiments, the first member 12 has a protrusion 121, the protrusion 121 is disposed along the length of the first tube 1, the first member 12 is fixedly connected to the second member 13, a portion of the wall of the first channel 11 includes the protrusion 121, the second member 13 includes another portion of the wall of the first channel 11, the second member 13 includes a plurality of first holes 16 disposed at intervals along the length of the first tube 1, the first tube 1 further includes a plurality of first plates 17 disposed at intervals along the length of the first tube 1, the plurality of first plates 17 divide the first chamber 15 into a plurality of first subchambers 151, and the third member 14 is fixedly connected to the second member 13.

Referring to fig. 2 and 3, the first member 12 has a protrusion 121, the protrusion 121 is disposed along the length direction of the first tube 1, the protrusion 121 may be formed by punching the first member 12, so that a part of material on the first member 12 protrudes along the width direction of the first tube 1, the first member 12 is fixedly connected with the second member 13, the connection manner may be welding, bonding, etc., when the first member 12 is connected with the second member 13, the first channel 11 is formed therebetween, and a part of the sidewall of the first channel 11 is formed by the wall surface of the protrusion 121 of the first member 12, and another part of the sidewall of the first channel 11 is formed by the second member 13.

The second member 13 may be provided with a plurality of first holes 16 along the length direction of the first tube 1, the sizes of the first holes 16 may be the same or different, and the sizes of the first holes 16 may be designed according to the distribution requirements of actual working conditions, for example, in some embodiments, the cross-sectional area of each first hole 16 arranged along the gravity direction on the second member 13 may be gradually reduced, so that the cross-sectional area of the first hole 16 near the upper end of the first tube 1 is larger than the cross-sectional area of the first hole 16 near the lower end of the first tube 1, thereby increasing the refrigerant flow rate of the upper heat exchange tube 3, and being beneficial to reducing the problem that the refrigerant is accumulated on the heat exchange tube 3 below the heat exchanger 100 due to the along-path resistance and gravity.

The second member 13 comprises a plurality of first holes 16 arranged at intervals in the length direction of the first tube 1, the number of the first holes 16 can be matched with that of the heat exchange tubes 3, the first holes 16 are arranged on the second plate, and the first holes 16 are arranged at intervals in the length direction of the first tube 1, so that each first hole 16 can be communicated with different first subchambers 151, and also can be communicated with the same first subchamber 151.

The first tube 1 further comprises a plurality of first plates 17, the first plates 17 are arranged at intervals in the length direction of the first tube 1, the first chambers 15 are divided into a plurality of first subchambers 151 by the first plates 17, the first plates 17 can be integrally formed with the second piece 13 or the third piece 14, or can be independently arranged in the first tube 1, and the first plates 17 are beneficial to adjusting the distribution of the refrigerant in the first tube 1 by dividing the first tube 1 into a plurality of first subchambers, so that the heat exchange performance of the heat exchanger is beneficial to being improved.

The third member 14 and the second member 13 may be fixedly connected by welding, bolting, clamping, or the like.

In some embodiments, a portion of the cross-sectional flow area of the fifth sub-passage 115 is smaller than a portion of the cross-sectional flow area of the other portions of the fifth sub-passage 115.

Referring to fig. 4, it can be understood that the flow cross-sectional area of the portion of the fifth sub-channel 115 is smaller than the flow cross-sectional area of the other portion of the fifth sub-channel 115, and the portion with the smaller flow cross-sectional area has a high flow velocity, so that the pressure of the portion is small, and a certain attractive force can be generated in the portion, so that the refrigerant in the first channel 11 flows into the portion with the small flow cross-sectional area rapidly under the action of the pressure.

In some embodiments, the third member 14 further comprises a plurality of engaging portions 141, the plurality of engaging portions 141 being disposed at intervals along the length of the first tube 1, the engaging portions 141 abutting the first member 12.

Referring to fig. 5, after the first member 12 and the third member 14 are assembled, the joint 141 abuts against the first member 12, so that the relative positions of the first member 12 and the third member 14 are fixed, and the structural strength of the first tube 1 in the heat exchanger 100 is improved.

In some embodiments, the second member 13 is provided with a plurality of first holes 16 in the length direction of the first tube 1, a part of the first holes 16 being in communication with the first sub-channel 111, and a part of the first holes 16 being in communication with the second sub-channel 112.

Referring to fig. 6, since a portion of the first holes 16 is in communication with the first sub-channels 111 and another portion of the first holes 16 is in communication with the second sub-channels 112, the refrigerant flowing in the first channel 11 can flow into the first sub-cavities 151 along the first holes 16 when passing through the first sub-channels 111, and can flow into the first sub-cavities 151 along the first holes 16 when passing through the second sub-channels 112, and further since the first sub-channels 111 and the second sub-channels 112 are all arranged along the length direction of the first tube 1, and the first sub-channels 111 and the second sub-channels 112 are spaced apart in the width direction of the first tube 1, the two first holes 16 in communication with the same first sub-cavity 151 can be respectively in communication with the first sub-channels 111 and the second sub-channels 112, so that the refrigerant can flow into the first sub-cavities 151 in both the first sub-channels 111 and the second sub-channels 112, thereby facilitating the adjustment of the refrigerant distribution, reducing the refrigerant gas-liquid separation phenomenon, and improving the heat exchange efficiency of the heat exchanger.

In some embodiments, the first tube 1 further comprises a fourth member 18, the fourth member 18 extending along the length of the first tube, the fourth member 18 extending along the thickness of the first tube, the fourth member 18 comprising a plurality of slots 181, the slots 181 being spaced apart along the length of the first tube, at least a portion of the fourth member 18 being positioned within the first cavity 15.

Referring to fig. 7, the fourth member 18 is provided with a plurality of slots 181, the fourth member 18 is located between the second member 13 and the third member 14, the second member 13, the third member 14 and the fourth member 18 are connected, the inner wall of the slots 181 and the second member 13 and the third member 14 enclose the inner wall of the first subchamber 151 together, one slot 181 can be communicated with one or more heat exchange tubes 3, in this example, the heat exchanger using the fourth member 18 not only effectively improves the production efficiency of the heat exchanger, but also can help to adjust the distribution of the refrigerant by adjusting the interval between the adjacent slots 181, and is beneficial to improving the heat exchange efficiency of the heat exchanger.

In some embodiments, the first tube 1 further comprises a plurality of fourth tubes 5, one end of the fourth tubes 5 being in communication with the first channel 11, the other end of the fourth tubes 5 being in communication with the first aperture 16, the fourth tubes 5 being in communication with the first channel 11 and the first subchamber 151.

Referring to fig. 8, a plurality of fourth tubes 5 are used to communicate the first channels 11 with the first holes 16, which is helpful for adjusting the distribution of the refrigerant, reducing the gas-liquid separation phenomenon of the refrigerant, and improving the heat exchange efficiency of the heat exchanger.

In some embodiments, the first member 12 comprises an annular tube 122, the annular tube 122 comprising a first sub-channel 111, a second sub-channel 112, a third sub-channel 113 and a fourth sub-channel 114, the plurality of fourth tubes 5 being arranged at intervals in the length direction of the first tube 1, at least a portion of one end of the fourth tube 5 being in communication with the first sub-channel 111 and the other end of the portion of the fourth tube 5 being in communication with the first aperture 16.

Referring to fig. 8 and 9, in the present embodiment, the first channel 11 is formed by using a complete annular pipe, so that the sealing performance is better, leakage is not easy, and the plurality of fourth pipes 5 are used to communicate the first channel 11 with the first holes 16, which is also helpful for adjusting the refrigerant distribution, reducing the gas-liquid phenomenon of the refrigerant, and improving the heat exchange performance of the heat exchanger.

In some embodiments, one end of another portion of the fourth tube 5 communicates with the second sub-channel 112 and the other end of the other portion of the fourth tube 5 communicates with the first aperture 16.

Referring to fig. 9, in the present embodiment, a portion of the fourth tube 5 is communicated with the first sub-channel 111, another portion of the fourth tube 5 is communicated with the second sub-channel 112, and the ends of the fourth tube 5 far from the first channel 11 are all communicated with the first holes 16.

In some embodiments, the cross-sectional area of the first sub-channel 111 is greater than the cross-sectional area of the second sub-channel 112 in at least one cross-section of the first tube.

Referring to fig. 11, in this embodiment, the cross-sectional area of the first sub-channel 111 may be larger than that of the second sub-channel 112, or the cross-sectional area of the first sub-channel 111 may be smaller than that of the second sub-channel 112, which is beneficial to increasing the return velocity of the refrigerant, adjusting the distribution of the refrigerant, and improving the heat exchange efficiency of the heat exchanger.

In some embodiments, the flow area of the first sub-channel 111 increases and/or the flow area of the second sub-channel 112 decreases along the length of the first tube.

Referring to fig. 12, in the present embodiment, the cross-sectional areas of the first sub-channel 111 and the second sub-channel 112 may be increased or decreased along the length direction of the first tube. The flow rate and the flow velocity of the refrigerant in the first sub-channel 111 and the second sub-channel 112 are adjusted by utilizing the change of the sectional area, which is also helpful for adjusting the refrigerant distribution and improving the heat exchange efficiency of the heat exchanger 100.

There is also provided in accordance with the present application a heat exchange system comprising a heat exchanger 100 of any one of the above, the heat exchanger 100 comprising:

the heat exchange tube comprises a first tube 1, a second tube 2 and heat exchange tubes 3, wherein the first tube 1 and the second tube 2 are arranged at intervals, the length direction of the first tube 1 is parallel to the vertical direction or is at an angle with the vertical direction, the angle is not equal to 90 degrees, in the vertical direction, the length of at least one first subchamber positioned above is smaller than the length of another first subchamber positioned below, a plurality of heat exchange tubes 3 are arranged at intervals along the length direction of the first tube 1, each heat exchange tube 3 comprises a plurality of channels arranged at intervals along the length direction of the heat exchange tube 3, the channels are arranged at intervals along the width direction of the heat exchange tube 3, and the heat exchange tubes 3 are communicated with the first tube 1 and the second tube 2;

the heat exchanger 100 further comprises fins, the fins comprise fins 6, part of the fins 6 are located between two adjacent heat exchange tubes 3 along the length direction of the first tube 1, the part of fins 6 are connected with the heat exchange tubes 3, the number of the fins 6 is multiple, the heat exchanger is favorable for improving the distribution uniformity of refrigerant, and a heat exchange system using the heat exchanger is favorable for improving the heat exchange performance of the heat exchange system.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims (11)

1. A heat exchanger comprising a first tube, a second tube, and a plurality of heat exchange tubes, the heat exchange tubes being directly or indirectly connected to the first tube, the heat exchange tubes being directly or indirectly connected to the second tube, the first tube comprising:

the first channel comprises a first sub-channel and a second sub-channel, the first sub-channel is arranged along the length direction of the first pipe, the second sub-channel is arranged along the length direction of the first pipe, the first sub-channel and the second sub-channel are arranged at intervals along the width direction of the first pipe, the first channel further comprises a third sub-channel, and the third sub-channel is communicated with the first sub-channel and the second sub-channel;

a first member, a second member and a third member, the second member being located between the first member and the third member in a thickness direction of the first tube, the third member being directly or indirectly connected to the heat exchange tube;

a first cavity, a wall surrounding the first cavity comprising the second piece and the third piece;

the first cavity comprises a plurality of first subchambers, the plurality of first subchambers are arranged at intervals along the length direction of the first pipe, and two adjacent first subchambers in the length direction of the first pipe are not directly communicated;

the minimum length of at least one first subchamber in the length direction of the first pipe is L1, and the minimum length of at least one other first subchamber in the length direction of the first pipe is L2, wherein L2 is greater than or equal to L1;

the second member includes a plurality of first apertures extending therethrough, at least one of the first apertures being in communication with one of the first subchambers;

the first sub-channel communicates with the first cavity via a plurality of the first holes and/or the second sub-channel communicates with the first cavity via a plurality of the first holes.

2. The heat exchanger of claim 1, wherein the first member has a boss having a length in a length direction of the first tube, the first member is fixedly connected to the second member, the third member is fixedly connected to the second member, a wall partially surrounding the first channel includes the boss, and the second member includes another wall partially surrounding the first channel.

3. The heat exchanger of claim 1 or 2, wherein the second member further comprises a first plate, a portion of the first plate being located within a first cavity, the first plate being a plurality of the first plates, the plurality of first plates being spaced apart along the length of the first tube, the plurality of first plates dividing the first cavity into a plurality of the first subchambers.

4. The heat exchanger of claim 1 or 2, wherein the first tube further comprises a fourth piece having a length in the length direction of the first tube, the fourth piece having a thickness in the thickness direction of the first tube, the fourth piece comprising a plurality of slots extending through the fourth piece, the slots being spaced apart along the length direction of the first tube, a portion of the fourth piece being located within the first cavity.

5. The heat exchanger of claim 1 or 2, further comprising a third tube, wherein the first channel further comprises a fifth sub-channel, the fifth sub-channel being in communication with the first sub-channel, the fifth sub-channel comprising a first opening, the first opening being in communication with the third tube, a portion of the fifth sub-channel having a cross-sectional flow area that is smaller than a cross-sectional flow area of other portions of the fifth sub-channel.

6. The heat exchanger of claim 1 or 2, wherein the first channel further comprises a fourth sub-channel, the fourth sub-channel communicating the first sub-channel and the second sub-channel.

7. The heat exchanger of claim 1, wherein the first tube further comprises a plurality of fourth tubes, one end of the fourth tubes being in communication with the first channel, the other end of the fourth tubes being in communication with the first bore, the fourth tubes being in communication with the first channel and the first chamber.

8. The heat exchanger of claim 7, wherein the first member comprises an annular tube, the annular tube comprising the first sub-channel, the second sub-channel, the third sub-channel, the annular tube further comprising a fourth sub-channel, the third sub-channel communicating with the first sub-channel and the second sub-channel, the fourth sub-channel communicating with the first sub-channel and the second sub-channel, one end of a portion of the fourth tube communicating with the first sub-channel, the other end of the portion of the fourth tube communicating with a portion of the first aperture, one end of another portion of the fourth tube communicating with the second sub-channel, the other end of the portion of the fourth tube communicating with another portion of the first aperture.

9. The heat exchanger of claim 1 or 2 or 7 or 8, wherein the cross-sectional area of the first sub-channel is larger than the cross-sectional area of the second sub-channel in at least one cross-section of the first tube.

10. The heat exchanger according to claim 1 or 2 or 7 or 8, wherein the flow area of the first sub-channels increases and/or the flow area of the second sub-channels decreases along the length of the first tubes.

11. A heat exchange system comprising the heat exchanger of any one of claims 1-10, the heat exchanger comprising:

the first pipe and the second pipe are arranged at intervals, the length direction of the first pipe is parallel to the vertical direction or is angled with the vertical direction, the angle is not equal to 90 degrees, and the length of at least one first subchamber positioned above is smaller than the length of the other first subchamber positioned below in the vertical direction;

the heat exchange tubes are arranged at intervals along the length direction of the first tube, each heat exchange tube comprises a plurality of channels extending along the length direction of the heat exchange tube, the channels are arranged at intervals along the width direction of the heat exchange tube, the heat exchange tubes are directly or indirectly connected with the first tube, and the heat exchange tubes are directly or indirectly connected with the second tube;

the fins are connected with the heat exchange tubes, part of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube, and the number of the fins is multiple.

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