Flow dividing and collecting structure, micro-channel heat exchanger and heat pump system

Abstract

The flow dividing and collecting structure comprises a flow dividing and collecting assembly and a sealing main plate, the flow dividing and collecting assembly comprises a channel part and a flow equalizing part, a plurality of flow equalizing cavities are formed in the first brazing surface of the flow equalizing part in an array mode, and each flow equalizing cavity is communicated with a fluid channel of the channel part through a corresponding flow equalizing groove channel and a flow dividing hole; the sealing main plate is provided with an array formed by a plurality of heat exchange tube insertion holes, the heat exchange tube insertion holes correspond to the flow equalizing cavities in position, and the lower surface of the sealing main plate is attached to the first brazing surface of the flow dividing and collecting assembly to form a uniformly-sealed flow dividing and collecting structure; the scheme that the flow dividing and collecting assembly and the sealing main plate are machined respectively is adopted, design and machining of the flow equalizing channels are facilitated, and the better flow equalizing effect is achieved; the micro-channel heat exchanger and the heat pump system adopting the flow dividing and collecting structure are small in size, high in bearing pressure, low in cost and high in heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a flow distribution structure, a microchannel heat exchanger and a heat pump system. Background Art

[0002] Microchannel heat exchangers are widely used in air-conditioning systems and new energy thermal management systems due to their high heat exchange efficiency per unit volume. The microchannel heat exchanger in the prior art is a plurality of parallel heat exchange flat tubes inserted into the distribution and collection pipes on both sides. The fluid medium entering the collection pipe is diverted to the flat tubes to exchange heat with the fluid outside the flat tubes. This simple distribution and collection structure is difficult to achieve uniform diversion, and the fluid flow rates in each flat tube are different, which seriously affects the improvement of heat exchange efficiency. Especially when the fluid in the flat tube is refrigerant, the refrigerant in the collection pipe is in gas-liquid two-phase flow and is more difficult to be evenly distributed to multiple flat tubes.

[0003] In response to the above problems, Chinese patent CN104154802B discloses a refrigerant diversion structure, which realizes uniform diversion by setting radial groove-shaped flow channels in the distribution pipe; the circular column structure of this scheme has the following multiple defects. On the one hand, the diameter of the distribution pipe is required to exceed the maximum width of the matching flat tube. On the other hand, it is difficult to process a considerable number of radial grooves on the limited circumferential surface of the column. On the other hand, it is necessary to stamp a plurality of flat tube jacks on the collection pipe mounted outside the column. It is difficult to complete the positioning and mounting of the collection pipe after stamping with the column.

[0004] The existing microchannel heat exchanger flow distribution structure needs further research and improvement. Utility Model Content

[0005] In order to effectively solve the problems existing in the prior art, the utility model discloses a flow distribution structure which can evenly distribute liquid and is convenient to process.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a flow distribution structure, comprising a flow distribution component and a sealing mainboard, wherein the flow distribution component comprises a channel portion and a flow equalizing portion, a first brazing surface array of the flow equalizing portion is provided with a plurality of flow equalizing cavities, each of which is respectively connected with a fluid channel of the channel portion via a corresponding flow equalizing groove and a flow diversion hole; the sealing mainboard is provided with an array composed of a plurality of heat exchange tube jacks, the heat exchange tube jacks correspond to the positions of the flow equalizing cavities, the lower surface of the sealing mainboard is fitted with the first brazing surface of the flow distribution component, so as to form a sealed uniform flow distribution structure.

[0008] According to the flow distribution structure provided by the utility model, the flow distribution component is composed of two separate parts, the channel part and the flow equalizing part, which are combined in a fitting or plug-in manner.

[0009] According to the flow distribution structure provided by the utility model, the flow equalizing part also includes a sealing bottom plate, the flow equalizing cavity runs through the flow equalizing part, and the sealing bottom plate is fitted with the second brazing surface of the flow equalizing part to form a seal at the bottom of the flow equalizing cavity.

[0010] According to the flow distribution and collection structure provided by the utility model, the flow equalizing channels connected between the flow distribution holes and the flow equalizing chamber are a multi-channel parallel structure.

[0011] According to the flow distribution structure provided by the utility model, the flow distribution component also includes a process cavity, the process cavity and the flow equalization cavity are arranged at intervals, some heat exchange tube holes correspond to the positions of the process cavity, and adjacent process cavities are connected through process channels.

[0012] According to the flow distribution and collection structure provided by the utility model, the channel portion includes a first fluid channel and a second fluid channel. The first fluid channel is connected to a part of the flow equalizing cavity through the flow distribution hole and the flow equalizing groove, and the second fluid channel is connected to another part of the flow equalizing cavity through the flow distribution hole and the flow equalizing groove.

[0013] The flow equalizing cavities of the two parts are arranged at intervals.

[0014] The flow balancing channel is arranged on the first brazing surface or the second brazing surface of the flow balancing part, the lower surface or the upper surface of the sealing main board, so that the flow balancing channel formed by the seal is located in several combinations of the same plane or different planes.

[0015] In addition, the utility model also provides a microchannel heat exchanger, including a flow distributor, a flat tube, and fins. The flow distributor is a flow distributor structure provided by the utility model.

[0016] In addition, the utility model further provides a heat pump system, including a microchannel heat exchanger, wherein the flow distributor and collector of the microchannel heat exchanger is a flow distributor and collector structure provided by the utility model.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model adopts a solution of separately processing a planar flow distribution component and a sealing structure, which makes it convenient to groove the planar brazing surface of the flow distribution component, and facilitates positioning and sealing, thereby achieving a better flow equalization effect; it avoids the problem that the current microchannel heat exchanger has no flow equalization structure, resulting in uneven flow of fluids entering each flat tube, and solves the problem that the existing circular cylindrical flow distribution structure is inconvenient to process grooves on the circumferential surface and difficult to position and assemble. In addition, the microchannel heat exchanger and heat pump system using the flow distribution structure are small in size, high in pressure resistance, low in cost, and high in heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the disassembled structure of Example 1 of the distribution flow structure provided by the utility model;

[0020] Figure 2 This is a schematic diagram of the disassembled structure of embodiment 2 of the distribution flow structure provided by the utility model;

[0021] Figure 3 A schematic diagram of the structure of some components of Embodiment 2 of the distribution flow structure provided by the utility model;

[0022] Figure 4 It is a schematic diagram of the assembly structure of some components of the embodiment 2 of the distribution flow structure provided by the utility model;

[0023] Figure 5 A schematic diagram of the structure of some components of Embodiment 3 of the distribution flow structure provided by the utility model;

[0024] Figure 6 It is a schematic diagram of the assembly structure of the flow distribution structure embodiment 2 provided by the utility model;

[0025] Figure 7 It is a schematic diagram of the disassembled structure of embodiment 4 of the distribution flow structure provided by the utility model;

[0026] Figure 8 It is a schematic diagram of the assembly structure of the embodiment 4 of the distribution flow structure provided by the utility model;

[0027] Fig. 9 A schematic diagram of the structure of some components of Embodiment 5 of the flow distribution structure provided by the utility model;

[0028] Fig.10 This is a schematic diagram of the disassembled structure of Example 6 of the distribution flow structure provided by the utility model;

[0029] Fig.11 It is a schematic diagram of the assembly structure of the flow distribution structure embodiment 7 provided by the utility model;

[0030] Fig.12 It is a schematic diagram of the disassembled structure of Example 7 of the distribution flow structure provided by the utility model;

[0031] Fig.13 This is a schematic diagram of the disassembled structure of Example 8 of the distribution flow structure provided by the utility model;

[0032] Fig.14 A schematic diagram of the structure of some components of Embodiment 8 of the distribution flow structure provided by the utility model;

[0033] Fig.15 This is a schematic diagram of the disassembled structure of Example 9 of the distribution flow structure provided by the utility model;

[0034] Fig.16It is a schematic diagram of the assembly structure of the embodiment 10 of the distribution flow structure provided by the utility model;

[0035] Fig.17 It is a schematic diagram of the assembly structure of the flow distribution structure embodiment 11 provided by the utility model;

[0036] Fig.18 It is a schematic diagram of the assembly structure of the flow distribution structure embodiment 12 provided by the utility model;

[0037] Fig.19 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 1 provided by the utility model;

[0038] Fig. 20 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 2 provided by the utility model;

[0039] Fig.21 A schematic cross-sectional structure diagram of some components of an embodiment of a microchannel heat exchanger provided by the utility model;

[0040] Fig. 22 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 3 provided by the utility model;

[0041] Fig.23 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 4 provided by the utility model;

[0042] Fig.24 It is a schematic diagram of the structure of different forms of some components of the microchannel heat exchanger embodiment 3 or 4 provided by the utility model;

[0043] Fig.25 A schematic cross-sectional structure diagram of some components of another embodiment of the microchannel heat exchanger provided by the utility model;

[0044] Fig.26 A schematic cross-sectional structure diagram of some components of another embodiment of the microchannel heat exchanger provided by the utility model;

[0045] Fig. 27 A schematic structural diagram of some components of another embodiment of the microchannel heat exchanger provided by the utility model;

[0046] Fig.28 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 5 provided by the utility model;

[0047] Fig.29 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 6 provided by the utility model;

[0048] Fig.30This is a schematic structural diagram of some components of another embodiment of the microchannel heat exchanger provided by the utility model.

[0049] Fig.31 This is a schematic diagram of the assembly structure of the microchannel heat exchanger embodiment 7 provided by the utility model;

[0050] Fig.32 This is a structural schematic diagram of some components of Example 13 of the distribution flow structure provided by the utility model.

[0051] Reference numerals:

[0052] 1. Flow distribution assembly; 11. Flow equalization part; 110. Flow equalization cavity; 111. Flow equalization channel; 112. Flow process cavity; 113. Flow process channel; 12. Channel part; 120. Flow diversion hole; 121. First fluid channel; 122. Second fluid channel; 13. Sealing bottom plate; 2. Sealing main board; 20. Heat exchange tube jack; 4. Flat tube. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings and specific embodiments:

[0054] Combine the following Figure 1 The utility model provides a flow distribution structure, which includes a flow distribution component 1 and a sealing mainboard 2. The flow distribution component 1 includes a channel portion 12 and a flow equalizing portion 11. The first brazing surface array of the flow equalizing portion 11 is provided with a plurality of flow equalizing cavities 110. Each flow equalizing cavity 110 is connected to the fluid channel of the channel portion 12 via a corresponding flow equalizing groove 111 and a flow diversion hole 120. The sealing mainboard 2 is provided with an array of a plurality of heat exchange tube sockets 20. The positions of the heat exchange tube sockets 20 and the flow equalizing cavities 110 correspond. The lower surface of the sealing mainboard 2 is fitted with the first brazing surface of the flow distribution component 1 to form a sealed uniform flow distribution structure.

[0055] like Figure 1 and Figure 2 As shown, according to the flow distribution structure provided by the utility model, the flow distribution component 1 is composed of two separate parts, the channel part 12 and the flow equalizing part 11, which are assembled by bonding or plugging. Figure 1 and Figure 2 The two separate parts of the channel part 12 and the flow equalizing part 11 are respectively formed into the flow dividing and collecting assembly 1 by bonding and plugging.

[0056] like Figure 3 and Figure 4As shown, the flow balancing channel 111 can be connected to the flow balancing chamber 110 at different positions of the flow balancing chamber 110, and the shape of the flow balancing channel 111 can be a combination of one or more of a straight line, a curve, and a gradient channel; the cross-sectional shape of the flow balancing channel 111 can be set to a combination of one or more of a rectangle, a semicircle, a trapezoid, and a V-shape, and the area of ​​each flow balancing channel 111 can be unequal to achieve the adjustment of the flow of each flow balancing chamber 110. In addition, each flow balancing chamber 110 can be connected to the fluid channel of the channel portion 12 through one or more flow balancing channels 111, that is, one flow dividing hole 120 can be connected to one flow balancing chamber 110 through multiple flow balancing channels 111, or multiple flow dividing holes 120 can be connected to one flow balancing chamber 110 through corresponding flow balancing channels 111.

[0057] In addition, if Figure 5 As shown, the flow distribution assembly 1 also includes a process chamber 112 , which is arranged at intervals with the flow equalization chamber 110 , and some heat exchange tube jacks 20 correspond to the positions of the process chamber 112 , and adjacent process chambers 112 are connected through a process channel 113 .

[0058] Figure 6 The situation shown is Figure 2 The structure after the components are assembled is shown in FIG. 1 , wherein the first brazing surface of the current equalizing portion 11 is attached to the lower surface of the sealing main board 2 , and then connected to the channel portion 12 .

[0059] like Figure 7 and Figure 8 As shown, the flow balancing part 11 further includes a sealing bottom plate 13, the flow balancing cavity 110 runs through the flow balancing part 11, and the sealing bottom plate 13 is fitted with the second brazing surface of the flow balancing part 11 to form a seal at the bottom of the flow balancing cavity 110. When the sealing bottom plate 13 is provided, the sealing main board 2 of the first brazing surface of the flow balancing part 11 is fitted with the lower surface of the sealing main board 2, and the second brazing surface of the flow balancing part 11 is fitted with the sealing bottom plate 13, and then connected to the channel part 12. Figure 7 and Figure 8 They are respectively an assembled structure and a disassembled structure including the sealing bottom plate 13 .

[0060] It should be noted that Figures 1 to 8 The embodiment shown is a case where one fluid medium is used. When two or more fluid media are used, the channel portion 12 further includes a first fluid channel 121 and a second fluid channel 122. Fig. 9 and Fig.10As shown, the first fluid channel 121 is connected to a part of the flow balancing chamber 110 through the flow splitting hole 120 and the flow balancing channel 111, and the second fluid channel 122 is connected to another part of the flow balancing chamber 110 through the flow splitting hole 120 and the flow balancing channel 111. The first fluid channel 121 and the second fluid channel 122 flow two different fluid media respectively. Fig. 9 and Fig.10 The first fluid channel 121 and the second fluid channel 122 are connected to the flow equalizing portion 11 by fitting and plugging, respectively.

[0061] exist Fig.10 Based on the above, the sealing bottom plate 13 is further included. Fig.11 , Fig.12 , Fig.13 As shown. Among them, Fig.11 The assembly is shown. Fig.12 and Fig.13 In addition, the flow balancing channel 111 can be arranged on the first brazing surface or the second brazing surface of the flow balancing part 11, the lower surface or the upper surface of the sealing main board 2, so that the flow balancing channel 111 formed by the seal is located in the same plane or in several combinations of different planes. For example, Fig.12 The illustrated situation is that the flow balancing channel 111 and the flow balancing cavity 110 are arranged only on one surface (the first brazing surface) of the flow balancing portion 11, and the two fluid media flow through the flow balancing channel 111 on the same surface of the flow balancing portion and enter the corresponding flow balancing cavity 110, and the flow balancing cavities 110 of the two parts are arranged alternately; Fig.13 The situation shown is that the flow balancing groove 111 and the flow balancing cavity 110 are arranged on the two surfaces (the first brazing surface and the second brazing surface) of the flow balancing part 11, and the two fluid media flow in the flow balancing groove 111 on the upper and lower surfaces of the flow balancing part and enter the corresponding flow balancing cavity 110. The structure of the corresponding flow balancing part 11 is as shown in FIG. Fig.14 shown.

[0062] In addition, when two fluid media are used, in addition to setting the flow balancing channels 111 of the two fluid media on one flow balancing portion 11, they can also be set on two flow balancing portions 11. In this case, the flow balancing portions 11 and the sealing main board 2 of the two fluid media are alternately arranged, and the first fluid channel 121 and the second fluid channel 122 correspond to a group of flow balancing portions 11 and the sealing main board 2, respectively. Fig.15 and Fig.16 The disassembled and assembled structures of this case are shown respectively.

[0063] Furthermore, when more than two fluid media are used, the flow equalizing portion 11 and the sealing main board 2 may be further provided, such as Fig.17The structure shown uses three groups of flow equalizing parts 11 and a sealing main board 2, which can allow three types of fluid media to flow.

[0064] also, Fig.15 , Fig.16 The situation shown is that both fluid media need to have equal flow, that is, two sets of equal flow parts 11 are set to correspond to the two fluid media respectively; when only one fluid medium needs to have equal flow and the other fluid medium does not need to have equal flow, only one of the fluids is provided with the equal flow part 11, and the fluid enters the equal flow part 11 from the channel part 12, as shown in FIG. Fig.18 As shown; while the other fluid flows in the second fluid channel 122 formed by the sealing bottom plate 13 and the flow equalizing portion 11.

[0065] like Fig.19 and Fig. 20 As shown, on the basis of the above-mentioned flow distribution structure, a microchannel heat exchanger can be formed by arranging flat tubes 4 and fins, wherein one end of the flat tube 4 is inserted into the heat exchange tube insertion hole 20 arranged on the sealing main board 2, and connected to the flow equalization cavity 110. The flat tube 4 can be directly inserted into the heat exchange tube insertion hole 20, or it can be bent and inserted into the heat exchange tube insertion hole 20. Fig.19 and Fig.21 The situations shown are respectively the case where one fluid medium and two fluid media are flowing.

[0066] Fig.21 The cross-sectional structure of the flat tube 4 is shown. Multiple partitions can be set in the flat tube 4 to form multiple flow channels. When the number of flow channels is greater, the structural strength of the flat tube 4 is greater, but the flow area is smaller. For example, Fig.21 The flat tubes 4 with a larger number of flow channels and the flat tubes 4 with a smaller number of flow channels can flow liquid media and gaseous media respectively.

[0067] It should be noted that Fig.19 and Fig. 20 In the case where all the flat tubes 4 are inserted into the heat exchange tube insertion holes 20 to the same depth, Fig. 22 and Fig.23 The flat tubes 4 are inserted into the heat exchange tube insertion holes 20 at different depths. That is, the flat tubes 4 for one medium are inserted into the flow balancing cavity 110 of the upper flow balancing part 11, while the flat tubes 4 for another medium are inserted into the flow balancing cavity 110 of the lower flow balancing part 11 through the upper flow balancing part 11. Fig. 22 As shown, or passing through the upper flow equalizing portion 11, inserted into the lower flow equalizing portion 11.

[0068] There are many combinations of the flat tube 4 inserted into the flow-distributing cavity 110, such as Fig.24 As shown, a single flat tube may be inserted into the flow equalizing cavity 110 , or two flat tubes may be pasted together and inserted into the flow equalizing cavity 110 , or two flat tubes may be pasted together and one of the flat tubes may be bent and inserted into the flow equalizing cavity 110 .

[0069] The cross-sectional structure of the two flat tubes 4 after bonding is as follows: Fig.25 As shown, two fluid media flow respectively; two fluid medium channels can also be set in the flat tube 4, such as Fig.26 and Fig. 27 shown.

[0070] like Fig.28 As shown, in Fig. 22 On the basis of, when two fluid medium channels are set in the above-mentioned flat tube 4, the flat tube 4 passes through the upper flow equalizing part 11 and is inserted into the lower flow equalizing part 11. A hole is opened on the side of the flat tube 4 so that two different media can enter the two fluid medium channels of the flat tube 4 respectively, one of which enters one of the fluid medium channels of the flat tube 4 through the upper flow equalizing part 11, and the other enters the other fluid medium channel of the flat tube 4 through the lower flow equalizing part 11. Similarly, Fig.29 As shown, in Fig.23 On the basis of the above, when two fluid medium channels are set in one flat tube 4, the flat tube 4 passes through the upper flow equalizing part 11, is inserted into the second fluid channel 122 formed by the lower flow equalizing part 11 and the sealing bottom plate 13, and a hole is opened on the side of the flat tube 4, so that two different media can enter the two fluid medium channels of the flat tube 4 respectively, one of which enters one of the fluid medium channels of the flat tube 4 through the upper flow equalizing part 11, and the other enters the other fluid medium channel of the flat tube 4 through the second fluid channel 122 formed by the lower flow equalizing part 11 and the sealing bottom plate 13. The case where the flat tube 4 has a hole opened on the side is as follows Fig.30 shown.

[0071] also, Fig.31 Shows applications such as Fig. 9 The diversity flow assembly 1 and Figure 5 The microchannel heat exchanger of the flow equalizing section 11 shown in FIG. Fig. 9 The first fluid channel 121 of the flow distribution and collection assembly 1 shown in FIG. 1 enters the two flat tubes 4 after passing through the flow balancing cavity 110 and flows to the opposite side. Figure 5 In the flow equalizing portion 11 shown, the fluid enters other flow chambers 112 through the flow channel 113 , then enters a flat tube 4 connected to the flow chamber 112 , flows back to the flow distribution and collection component 1 , and enters the second fluid channel 122 .

[0072] Further, if Fig.32 As shown, the number of the first fluid channel 121 and the second fluid channel 122 provided in the channel portion 12 of the flow distribution assembly 1 can be two ( Fig. 9The number of the first fluid channel 121 and the second fluid channel 122 shown is 1). At this time, one fluid flows into one of the first fluid channels 121 and then flows out of the other first fluid channel 121; another fluid flows into one of the second fluid channels 122 and then flows out of the other second fluid channel 122.

[0073] The utility model further provides a heat pump system, which includes the microchannel heat exchanger in the above embodiments. Other parts of the heat pump system are all existing technologies and will not be described in detail here.

Claims

1. A diversity flow structure, characterized in that: The invention comprises a flow distribution and collection component (1) and a sealing main board (2), wherein the flow distribution and collection component (1) comprises a channel portion (12) and a flow equalizing portion (11), wherein a first brazing surface array of the flow equalizing portion (11) is provided with a plurality of flow equalizing cavities (110), and each flow equalizing cavity (110) is connected to a fluid channel of the channel portion (12) via a corresponding flow equalizing groove (111) and a flow dividing hole (120); The sealing mainboard (2) is provided with an array of a plurality of heat exchange tube insertion holes (20), the heat exchange tube insertion holes (20) correspond to the positions of the flow distribution chamber (110), and the lower surface of the sealing mainboard (2) is in contact with the first brazing surface of the flow distribution assembly (1), thereby forming a sealed uniform flow distribution structure.

2. The diversity flow structure according to claim 1, characterized in that: The flow distribution and collection assembly (1) is composed of two separate parts, a channel part (12) and a flow equalizing part (11), which are assembled in a bonding or plug-in manner.

3. The diversity flow structure according to claim 2, characterized in that: The flow balancing portion (11) further comprises a sealing bottom plate (13); the flow balancing cavity (110) penetrates the flow balancing portion (11); the sealing bottom plate (13) is in contact with the second brazing surface of the flow balancing portion (11) to form a seal at the bottom of the flow balancing cavity (110).

4. The diversity flow structure according to claim 2, characterized in that: The flow equalizing channel (111) connected between the flow dividing hole (120) and the flow equalizing cavity (110) is a multi-channel parallel structure.

5. The diversity flow structure according to claim 2, characterized in that: The flow distribution assembly (1) further comprises a process chamber (112), the process chamber (112) and the flow equalization chamber (110) are arranged in an alternating manner, some heat exchange tube insertion holes (20) correspond to the positions of the process chamber (112), and adjacent process chambers (112) are connected via a process channel (113).

6. The diversity flow structure according to any one of claims 2 to 5, characterized in that: The channel portion (12) comprises a first fluid channel (121) and a second fluid channel (122); the first fluid channel (121) is connected to a portion of the flow balancing chamber (110) via a flow dividing hole (120) and a flow balancing channel (111); and the second fluid channel (122) is connected to another portion of the flow balancing chamber (110) via a flow dividing hole (120) and a flow balancing channel (111).

7. The diversity flow structure according to claim 6, characterized in that: The flow equalizing cavities (110) of the two parts are arranged in an alternating manner.

8. The stream diversity structure according to any one of claims 2 to 5, characterized in that: The flow balancing channel (111) is arranged on the first brazing surface or the second brazing surface of the flow balancing part (11), the lower surface or the upper surface of the sealing main board (2), so that the flow balancing channel (111) formed by sealing is located in the same plane or in several combinations of different planes.

9. A microchannel heat exchanger, comprising a manifold, a flat tube (4), and fins, characterized in that: The flow divider is the flow divider structure described in any one of claims 1-8.

10. A heat pump system, comprising a microchannel heat exchanger, characterized in that: The flow distributor and collector of the microchannel heat exchanger is the flow distributor and collector structure described in any one of claims 1-8.

Images