Collecting pipe, heat exchanger, refrigerating system and air conditioner

Abstract

The utility model relates to a collecting pipe, a heat exchanger, a refrigerating system and an air conditioner in the technical field of air conditioners, the collecting pipe is provided with two opposite ends, one end is an open end, and the other end is a closed end; the flow collecting pipe is provided with n transverse partition walls between the open end and the closed end, the flow collecting pipe is divided into n + 1 flow collecting pipe sections in the axial extending direction of the pipe through the transverse partition walls, n is larger than or equal to 1, flow channels which are not communicated with one another and used for refrigerant circulation are formed among flow channel cavities in the multiple flow collecting pipe sections, the structural design is simple, the structure is simple, and the flow collecting pipe is convenient to assemble and disassemble. According to the flow collecting pipe, the pipe diameter can be designed to be relatively small, the flow collecting pipe is suitable for being applied to a smaller space, refrigerants can be shunted in advance in the flow collecting pipe through the structural design, the refrigerants can be dispersed and output to the corresponding heat exchange pipe areas according to the receiving requirements of the heat exchange pipe areas, and therefore all the heat exchange pipes can be shunted evenly, and the heat exchange efficiency of the flow collecting pipe can be effectively improved; the heat exchange efficiency of the heat exchanger where the collecting pipe is located is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a header pipe, a heat exchanger, a refrigeration system and an air conditioner. Background Art

[0002] In the related art of air conditioner heat exchangers, the heat exchanger can effectively reduce the refrigerant filling amount and improve the economy, which has attracted wide attention and research and development by enterprises. The heat exchanger has many branches. When the heat exchanger is used as an evaporator, there is a problem of uneven flow distribution when the header pipe distributes the refrigerant to the heat exchange pipes, which directly affects the heat exchange efficiency of the heat exchanger, resulting in increased power consumption, reduced economy and comfort. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the technical problem of uneven flow distribution of the header pipe in the prior art, and provide a header pipe, a heat exchanger, a refrigeration system and an air conditioner.

[0004] The utility model aims to design a header pipe, the header pipe has opposite ends, one end is an open end and the other end is a closed end;

[0005] The header pipe is provided with n transverse partition walls between the open end and the closed end, and the transverse partition walls divide the header pipe into n + 1 header pipe segments along the axial extension direction of the pipe, n≥1;

[0006] The n transverse partition walls and the n + 1 header pipe segments are sequentially arranged in ascending order from the closed end to the open end of the header pipe, wherein the open end is formed at the end of the (n + 1)th header pipe segment away from the closed end; the closed end is formed at the end of the 1st header pipe segment away from the open end;

[0007] The n + 1 header pipe segments are respectively provided with pipe hole units on the same side pipe wall for installing heat exchange pipes and being in fluid communication with the heat exchange pipes;

[0008] Each header pipe segment is provided with a longitudinal partition wall, and the ith header pipe segment is provided with i - 1 longitudinal partition walls. The i - 1 longitudinal partition walls divide the cavity of the ith header pipe segment into i mutually independent and non - communicating flow channels. The i flow channels are arranged in ascending order according to the radial distance from the pipe wall side with the pipe hole unit, and the 1st flow channel closest to the pipe hole unit is in communication with the pipe hole unit; n≥i≥1;

[0009] The transverse partition wall and the longitudinal partition wall are designed such that the 1st flow channels of every two adjacent header pipe segments are not in communication, and the (i + 1)th flow channel of the (i + 1)th header pipe segment is in communication with the ith flow channel of the ith header pipe segment.

[0010] In some embodiments, each of the transverse partition walls is provided with a through-opening, which is formed on the transverse partition wall and / or formed between the end of the transverse partition wall and the wall of the manifold tube;

[0011] The i-th transverse partition wall is provided with i through-openings, and the i-th through-opening of the i-th transverse partition wall connects the (i + 1)-th flow channel cavity of the (i + 1)-th manifold tube section with the i-th flow channel cavity of the i-th manifold tube section, where i ≥ 1.

[0012] The through-opening is of an arc-shaped structure and / or a circular structure. The arc-shaped structure has at least upper and lower arc edges at different radial positions, and the arc-shaped structure surrounds the circular structure.

[0013] In some embodiments, all the longitudinal partition walls and transverse partition walls in the manifold tube integrally form an integral flow channel partition frame and are inserted into the manifold tube.

[0014] In some embodiments, n = 1. The 1 transverse partition wall includes a first transverse partition wall, which divides the manifold tube into two manifold tube sections along the axial extension direction of the tube. The two manifold tube sections are sequentially arranged in ascending order from the closed end to the open end of the manifold tube, and are respectively a first manifold tube section and a second manifold tube section. The open end is formed at the end of the second manifold tube section away from the closed end, and the closed end is formed at the end of the first manifold tube section away from the open end;

[0015] The tube hole unit includes a first tube hole unit formed on the first manifold tube section and a second tube hole unit formed on the second manifold tube section;

[0016] A first flow channel cavity is provided in the first manifold tube section, and the first flow channel cavity is communicated with the first tube hole unit;

[0017] A first longitudinal partition wall is provided in the second manifold tube section. The first longitudinal partition wall divides the cavity of the second manifold tube section into two mutually independent and non-communicating flow channel cavities. The two flow channel cavities are arranged in ascending order according to the order of the radial distance from the side wall where the second tube hole unit is opened, and are respectively a second flow channel cavity A and a second flow channel cavity B. The second flow channel cavity A is communicated with the second tube hole unit;

[0018] The first transverse partition wall and the first longitudinal partition wall A are designed such that the second flow channel cavity A and the first flow channel cavity are not communicated, and the second flow channel cavity B is communicated with the first flow channel cavity;

[0019] The second flow channel cavity A alone constitutes the first flow channel of the manifold tube, and the second flow channel cavity B and the first flow channel cavity together constitute the second flow channel of the manifold tube;

[0020] A first through port is provided on the first transverse partition wall to connect the second flow channel cavity B and the first flow channel cavity.

[0021] The first longitudinal partition wall A forms two sub-ports corresponding to the second flow channel cavity A and the second flow channel cavity B respectively at the open end of the manifold tube.

[0022] In some embodiments, n = 2, and the two transverse partition walls include a first transverse partition wall and a second transverse partition wall. The first transverse partition wall and the second transverse partition wall divide the manifold tube into three manifold tube segments along the axial extension direction of the tube. The three manifold tube segments are sequentially arranged in ascending order from the closed end to the open end of the manifold tube, and are respectively a first manifold tube segment, a second manifold tube segment, and a third manifold tube segment. The open end is formed at the end of the third manifold tube segment away from the closed end, and the closed end is formed at the end of the first manifold tube segment away from the open end;

[0023] The tube hole unit includes a first tube hole unit opened on the first manifold tube segment, a second tube hole unit opened on the second manifold tube segment, and a third tube hole unit opened on the third manifold tube segment;

[0024] A first flow channel cavity is provided in the first manifold tube segment, and the first flow channel cavity is communicated with the first tube hole unit;

[0025] A first longitudinal partition wall is provided in the second manifold tube segment. The first longitudinal partition wall divides the cavity of the second manifold tube segment into two mutually independent and non-flowing flow channel cavities. The two flow channel cavities are arranged in ascending order according to the radial distance from the side wall with the tube hole unit, and are respectively a second flow channel cavity A and a second flow channel cavity B. The second flow channel cavity A is communicated with the second tube hole unit;

[0026] A second longitudinal partition wall A and a second longitudinal partition wall B are provided in the third manifold tube segment. The second longitudinal partition wall A and the second longitudinal partition wall B divide the cavity of the third manifold tube segment into three mutually independent and non-flowing flow channel cavities. The three flow channel cavities are arranged in ascending order according to the radial distance from the side wall with the third tube hole unit, and are respectively a third flow channel cavity A, a third flow channel cavity B, and a third flow channel cavity C. The third flow channel cavity A is communicated with the third tube hole unit;

[0027] The first transverse partition wall, the first longitudinal partition wall, the second transverse partition wall, the second longitudinal partition wall A, and the second longitudinal partition wall B are designed such that the first flow channel cavity, the second flow channel cavity A, and the third flow channel cavity A are not connected to each other, and the first flow channel cavity, the second flow channel cavity B, and the third flow channel cavity C are connected and together constitute the third flow channel of the manifold; the third flow channel cavity B is connected to the second flow channel cavity A to jointly constitute the fourth flow channel of the manifold, and the third flow channel cavity A alone constitutes the fifth flow channel of the manifold;

[0028] A first through port for connecting the second flow channel cavity B to the first flow channel cavity is provided on the first transverse partition wall;

[0029] The second transverse partition wall is provided with a second through port and a third through port. The second through port connects the third flow channel cavity C to the second flow channel cavity B, and the third through port connects the third flow channel cavity B to the second flow channel cavity A.

[0030] In some embodiments, a flow divider is connected to the open end, and n flow dividing cavities are formed in the flow divider. The n flow dividing cavities correspond to and are connected to the n flow channel cavities of the nth manifold section one by one.

[0031] In some embodiments, a flow divider is connected to the open end, and i flow dividing cavities corresponding to and connected to the i flow channel cavities one by one are formed in the flow divider. At least one flow dividing hole is provided in each of the i flow dividing cavities, and the ratio of the total areas of the flow dividing holes in each flow dividing cavity is equal to the ratio of the refrigerant mass flow rates in the corresponding flow channel cavities.

[0032] In some embodiments, at least one flow dividing hole is provided in each flow dividing cavity, and the ratio of the total areas of the flow dividing holes in each flow dividing cavity is equal to the ratio of the refrigerant mass flow rates in the corresponding flow channels.

[0033] In some embodiments, the heat exchange tube can be any one of a straight channel, an S-shaped channel, or a U-shaped channel.

[0034] In some embodiments, a heat exchanger is provided, including:

[0035] A first manifold, a second manifold, and a plurality of heat exchange tube groups connected between the first manifold and the second manifold;

[0036] The first manifold is the above-mentioned manifold;

[0037] A connection port for leading in or out refrigerant is provided on the tube wall of the second manifold;

[0038] One ends of the plurality of heat exchange tube groups are connected to the second manifold, and the other ends are connected to a plurality of tube hole units of the first manifold in one-to-one correspondence.

[0039] In some embodiments, the multiple heat exchange tube groups are microchannel heat exchange tube groups.

[0040] In some embodiments, a refrigeration system is provided, including an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling device, and a four-way reversing valve, wherein the indoor heat exchanger and / or the outdoor heat exchanger adopt the above-mentioned heat exchanger.

[0041] In some embodiments, an air conditioner is provided, having an indoor heat exchanger and an outdoor heat exchanger, wherein the indoor heat exchanger and / or the outdoor heat exchanger adopt the above-mentioned heat exchanger.

[0042] The solution provided by the present utility model has the following beneficial effects compared with the prior art:

[0043] Through the sequential connection of multiple manifold sections, flow channels for refrigerant circulation that are not interconnected are formed between the flow channel cavities in each manifold section. This structural design is simple, allowing the refrigerant to be pre-distributed in the manifold, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, thereby enabling uniform distribution of the refrigerant to each heat exchange tube, effectively improving the heat exchange efficiency of the manifold. Compared with the design method of arranging multiple flow channels in a single tube, this design structure allows for a relatively smaller pipe diameter, suitable for application in smaller spaces. At the same time, in this manifold, the refrigerant is gradually distributed through each tube section during the flow process. Compared with the direct distribution method in a single tube section, this manifold distributes the refrigerant more fully and has a better distribution effect, thereby improving the heat exchange efficiency of the heat exchanger where the manifold is located, reducing the power consumption of the heat exchanger, and correspondingly enhancing the economy and comfort of the heat exchanger. Description of the Drawings

[0044] The drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0045] Figure 1 is a schematic cross-sectional view of the first manifold section and the second manifold section shown in an embodiment of the present utility model;

[0046] Figure 2 is a schematic external structure view of the first manifold section and the second manifold section shown in an embodiment of the present utility model;

[0047] Figure 3 is a schematic cross-sectional view of the first manifold section, the second manifold section, and the third manifold section shown in an embodiment of the present utility model;

[0048] Figure 4 It is a schematic diagram of the external structure of the first manifold pipe section, the second manifold pipe section, and the third manifold pipe section shown in the embodiments of the present utility model;

[0049] Figure 5 It is a schematic diagram of the structure of the first manifold pipe section shown in the embodiments of the present utility model;

[0050] Figure 6 It is a schematic diagram of the first manifold pipe section cut open shown in the embodiments of the present utility model;

[0051] Figure 7 It is a schematic diagram of the structure of the second manifold pipe section shown in the embodiments of the present utility model;

[0052] Figure 8 It is a schematic diagram of the port of the second manifold pipe section shown in the embodiments of the present utility model;

[0053] Figure 9 It is a schematic diagram of the second manifold pipe section cut open shown in the embodiments of the present utility model;

[0054] Figure 10 It is a schematic diagram of the structure of the third manifold pipe section shown in the embodiments of the present utility model;

[0055] Figure 11 It is a schematic diagram of the port of the third manifold pipe section shown in the embodiments of the present utility model;

[0056] Figure 12 It is a schematic diagram of the third manifold pipe section cut open shown in the embodiments of the present utility model;

[0057] Figure 13 It is a schematic diagram of the diverter shown in the embodiments of the present utility model;

[0058] Figure 14 It is a schematic diagram of the cross-sectional view of the diverter cut horizontally shown in the embodiments of the present utility model;

[0059] Figure 15 It is a schematic diagram of the second manifold pipe shown in the embodiments of the present utility model;

[0060] Figure 16 It is a schematic diagram of the heat exchanger shown in the embodiments of the present utility model;

[0061] Figure 17 It is a schematic diagram of the refrigeration system shown in the embodiments of the present utility model.

[0062] In the figure: 1 - first header pipe section, 100 - first flow channel cavity, 2 - second header pipe section, 200 - second flow channel cavity A, 3 - third header pipe section, 300 - second flow channel cavity B, 400 - third flow channel cavity A, 500 - third flow channel cavity B, 600 - third flow channel cavity C, 4 - second flow channel, 5 - first flow channel, 6 - fifth flow channel, 7 - diverter, 8 - first through port, 9 - second through port, 10 - third through port, 11 - first diversion hole B, 12 - second diversion hole B, 13 - third diversion hole B, 14 - heat exchange tube, 15 - first diversion cavity B, 16 - second diversion cavity B, 17 - heat exchange fins, 18 - tube hole unit, 181 - first tube hole unit, 182 - second tube hole unit, 183 - third tube hole unit, 19 - third diversion cavity B, 20 - third flow channel, 21 - fourth flow channel, 22 - cover, 23 - second header pipe, 24 - first transverse partition wall, 25 - open end, 26 - closed end, 27 - first longitudinal partition wall A, 28 - second transverse partition wall, 29 - second longitudinal partition wall A, 30 - second longitudinal partition wall B, 31 - throttling device, 32 - four-way reversing valve, 33 - indoor heat exchanger, 34 - outdoor heat exchanger, 35 - connection port, 36 - compressor.

[0063] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but rather to illustrate the concept of the present utility model to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0064] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0065] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "contacted", "communicated with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0066] In the related technology of air conditioner heat exchangers, there are many heat exchanger branches. When the heat exchanger is used as an evaporator, there is a problem of uneven flow distribution when the header pipe distributes the flow to the heat exchange tubes, which directly affects the heat exchange efficiency of the heat exchanger, resulting in increased power consumption and reduced economy and comfort.

[0067] The main reason for uneven flow distribution is that when the heat exchanger is used as an evaporator, the refrigerant is in a gas-liquid mixed state, and it is more likely to have uneven flow distribution in the header under this gas-liquid mixed state.

[0068] Based on this, the following embodiments are proposed.

[0069] Embodiment 1:

[0070] As Figure 1 、 3 shown, this embodiment provides a header,

[0071] The header has opposite ends, one end is the open end 25, and the other end is the closed end 26;

[0072] The header is provided with n transverse partition walls between the open end 25 and the closed end 26. The transverse partition walls divide the header into n + 1 header segments along the axial extension direction of the tube, where n ≥ 1;

[0073] The n transverse partition walls and the n + 1 header segments are sequentially arranged in ascending order from the closed end 26 to the open end 25 of the header. Among them, the open end 25 is formed at the end of the (n + 1)th header segment far from the closed end 26; the closed end 26 is formed at the end of the 1st header segment far from the open end 25;

[0074] The n + 1 header segments are respectively provided with tube hole units 18 on the same side wall for installing the heat exchange tubes 14 and being in fluid communication with the heat exchange tubes 14;

[0075] Each header segment is provided with a longitudinal partition wall. Among them, the ith header segment is provided with i - 1 longitudinal partition walls. The i - 1 longitudinal partition walls divide the cavity of the ith header segment into i flow channels. The i flow channels are arranged in ascending order according to the radial distance from the side wall with the tube hole unit 18 from near to far. The 1st flow channel closest to the tube hole unit 18 is in communication with the tube hole unit 18; n ≥ i ≥ 1;

[0076] The transverse partition walls and the longitudinal partition walls are designed such that the 1st flow channels of every two adjacent header segments are not in communication, and the (i + 1)th flow channel of the (i + 1)th header segment is in communication with the ith flow channel of the ith header segment.

[0077] Among them, the closed end 26 can be closed by a cover 22.

[0078] The flow channels for refrigerant circulation formed between the flow channel cavities in the multi-header pipe section are not interconnected. This structural design is simple, allows for a relatively smaller pipe diameter design, is suitable for application in smaller spaces, and this structural design can pre-distribute the refrigerant in the header pipe, enabling the refrigerant to be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, so that each heat exchange tube can receive uniform flow distribution, effectively improving the heat exchange efficiency of the header pipe and the heat exchanger where the header pipe is located.

[0079] Optionally, in one implementation of this embodiment, as Figure 2 , 4 , as shown in 7,

[0080] Each transverse partition wall is provided with a through port, and the through port is opened on the transverse partition wall and / or formed between the end of the transverse partition wall and the pipe wall of the header pipe;

[0081] The i-th transverse partition wall is provided with i through ports, and the i-th through port of the i-th transverse partition wall connects the (i + 1)-th flow channel cavity of the (i + 1)-th header pipe section with the i-th flow channel cavity of the i-th header pipe section, where i ≥ 1.

[0082] The through port is of an arc-shaped structure and / or a circular structure. The arc-shaped structure has at least upper and lower arc edges at different radial positions, and the arc-shaped structure surrounds the circular structure. The through port is designed as an arc-shaped structure or a circular structure, and both are adapted to the common shape of the header pipe, which is a circular cross-section. This can make more full use of the cross-section of the transverse partition wall, and the arc-shaped structure and the circular structure have small flow resistance to the refrigerant, making it more suitable for the refrigerant to flow smoothly.

[0083] Optionally, in one implementation of this embodiment, as Figure 1 , 3 shown,

[0084] All the longitudinal partition walls and transverse partition walls in the header pipe form an integral flow channel separator and are inserted into the header pipe.

[0085] Among them, the transverse partition walls and longitudinal partition walls can be separate components, can be integrally formed with the header pipe, or can form an integral flow channel separator from the transverse partition walls and longitudinal partition walls, and can be integrally inserted into the header pipe to achieve the separation and connection of different pipe sections and different flow channel cavities. Among them, an integral flow channel separator is convenient to form, making the overall header pipe easy to process.

[0086] Specifically, n = 1, as Figure 1 , 2 shown,

[0087] One horizontal partition wall includes a first horizontal partition wall 24. The first horizontal partition wall 24 divides the manifold into two manifold sections along the axial extension direction of the pipe. The two manifold sections are arranged in ascending order successively from the closed end 26 to the open end 25 of the manifold, and are respectively the first manifold section 1 and the second manifold section 2. The open end 25 is formed at the end of the second manifold section 2 away from the closed end 26, and the closed end 26 is formed at the end of the first manifold section 1 away from the open end 25;

[0088] The pipe hole units include a first pipe hole unit 181 opened on the first manifold section 1 and a second pipe hole unit 182 opened on the second manifold section 2;

[0089] A first flow channel cavity 100 is provided in the first manifold section 1, and the first flow channel cavity 100 is communicated with the first pipe hole unit 181;

[0090] A first longitudinal partition wall A27 is provided in the second manifold section 2. The first longitudinal partition wall A27 divides the cavity of the second manifold section 2 into two mutually independent and non-communicating flow channel cavities. The two flow channel cavities are arranged in ascending order according to the radial distance from the side wall where the second pipe hole unit 182 is opened, and are respectively the second flow channel cavity A200 and the second flow channel cavity B300. The second flow channel cavity A200 is communicated with the second pipe hole unit 182;

[0091] The first horizontal partition wall 24 and the first longitudinal partition wall A27 are designed such that the second flow channel cavity A200 and the first flow channel cavity 100 are not communicated, and the second flow channel cavity B300 is communicated with the first flow channel cavity 100;

[0092] The second flow channel cavity A200 alone constitutes the first flow channel 5 of the manifold, and the second flow channel cavity B300 and the first flow channel cavity 100 together constitute the second flow channel 4 of the manifold;

[0093] A first through port 8 for communicating the second flow channel cavity B300 with the first flow channel cavity 100 is provided on the first horizontal partition wall 24.

[0094] In this embodiment, the manifold is composed of the first manifold section 1 and the second manifold section 2. The first manifold section 1 and the second manifold section 2 are coaxially arranged, and the center lines of the first pipe hole unit 181 and the second pipe hole unit 182 are collinear, which is beneficial to the flow of the refrigerant between each manifold section and each pipe hole unit 18.

[0095] During the process of the refrigerant flowing through the header pipe, it is divided into two parts for flow. One part is located in the second flow channel 4, and the other part is located in the first flow channel 5. The refrigerant in the second flow channel 4 and the first flow channel 5 are respectively output to the corresponding heat exchange tube areas for heat exchange through their respective output ends. Among them, the output end of the second flow channel 4 is the first pipe hole unit 181 on the first flow channel cavity 100, and the output end of the first flow channel 5 is the second pipe hole unit 182 on the first flow channel cavity 200. Thus, the purpose of pre-shunting the refrigerant in the header pipe is achieved, enabling the refrigerant to be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas.

[0096] Specifically, the refrigerant first enters the second header pipe section 2 from the open end 25. The refrigerant in the second header pipe section 2 is divided into two parts. One part flows in the first flow channel cavity B200, and the other part flows in the second flow channel cavity B300. The refrigerant flowing in the first flow channel cavity B200 directly flows through the first flow channel 5 and is output to the corresponding heat exchange tube area for heat exchange through the output end of the first flow channel 5. The refrigerant flowing in the second flow channel cavity B300 flows through the first flow channel cavity 100 and is output to the corresponding heat exchange tube area for heat exchange through the output end of the first flow channel 5. Thus, pre-shunting in the header pipe is completed, enabling the refrigerant to be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, so that each heat exchange tube 14 can be evenly shunted, effectively improving the heat exchange efficiency of the heat exchanger where the header pipe is located, reducing the power consumption of the heat exchanger, and correspondingly improving the economy and comfort of the heat exchanger.

[0097] By connecting the two header pipe sections, the first flow channel cavity 100 in the first header pipe section 1 is correspondingly communicated with the second flow channel cavity B300 in the second header pipe section 2 to form the second flow channel 4, and the first flow channel cavity B200 arranged side by side with the second flow channel cavity B300 forms the first flow channel 5. This structural design is simple. Compared with the design method of setting multiple flow channel cavities in a single pipe section, this design structure can make the pipe diameter design relatively smaller, suitable for application in a smaller space. At the same time, in this header pipe, the refrigerant is gradually shunted through each pipe section during the flowing process. Compared with the method of directly shunting in a single pipe section, the shunting of the refrigerant in this header pipe is more sufficient and the shunting effect is better.

[0098] Specifically, n = 2, as Figure 3 、 4 shown,

[0099] The two transverse partition walls include a first transverse partition wall 24 and a second transverse partition wall 28. The first transverse partition wall 24 and the second transverse partition wall 28 divide the manifold into three manifold sections along the axial extension direction of the pipe. The three manifold sections are arranged in ascending order from the closed end 26 to the open end 25 of the manifold, and are respectively the first manifold section 1, the second manifold section 2, and the third manifold section 3. The open end 25 is formed at the end of the third manifold section 3 away from the closed end 26, and the closed end 26 is formed at the end of the first manifold section 1 away from the open end 25;

[0100] The pipe hole units include a first pipe hole unit 181 opened on the first manifold section 1, a second pipe hole unit 182 opened on the second manifold section 2, and a third pipe hole unit 183 opened on the third manifold section 3;

[0101] A first flow channel cavity 100 is provided in the first manifold section 1, and the first flow channel cavity 100 is communicated with the first pipe hole unit 181;

[0102] A first longitudinal partition wall A27 is provided in the second manifold section 2. The first longitudinal partition wall A27 divides the cavity of the second manifold section 2 into two independent and non-communicating flow channel cavities. The two flow channel cavities are arranged in ascending order according to the radial distance from the side wall with the pipe hole unit 18 from near to far, and are respectively the second flow channel cavity A200 and the second flow channel cavity B300. The second flow channel cavity A200 is communicated with the second pipe hole unit 182;

[0103] A second longitudinal partition wall A29 and a second longitudinal partition wall B30 are provided in the third manifold section 3. The second longitudinal partition wall A29 and the second longitudinal partition wall B30 divide the cavity of the third manifold section 3 into three independent and non-communicating flow channel cavities. The three flow channel cavities are arranged in ascending order according to the radial distance from the side wall with the third pipe hole unit 183 from near to far, and are respectively the third flow channel cavity A400, the third flow channel cavity B500, and the third flow channel cavity C600. The third flow channel cavity A400 is communicated with the third pipe hole unit 183;

[0104] The first transverse partition wall 24, the first longitudinal partition wall A27, the second transverse partition wall 28, the second longitudinal partition wall A29, and the second longitudinal partition wall B30 are designed such that the first flow channel cavity 100, the second flow channel cavity A200, and the third flow channel cavity A400 are not communicated with each other. The first flow channel cavity 100, the second flow channel cavity B300, and the third flow channel cavity C600 are communicated and jointly form the third flow channel 20 of the manifold; The third flow channel cavity B500 is communicated with the second flow channel cavity A200 to jointly form the fourth flow channel 21 of the manifold, and the third flow channel cavity A400 alone forms the fifth flow channel 6 of the manifold;

[0105] A first through port 8 for communicating the second flow channel cavity B300 with the first flow channel cavity 100 is provided on the first transverse partition wall 24;

[0106] The second horizontal partition wall 28 is provided with a second through port 9 and a third through port 10. The second through port 9 connects the third flow channel cavity C600 with the second flow channel cavity B300, and the third through port 10 connects the third flow channel cavity B500 with the second flow channel cavity A200.

[0107] In this embodiment, the manifold is composed of a first manifold section 1, a second manifold section 2, and a third manifold 3. The first manifold section 1, the second manifold section 2, and the third manifold section 3 are coaxially arranged, and the centerlines of the first tube hole unit 181, the second tube hole unit 182, and the third tube hole unit 183 are collinear, which is conducive to the flow of the refrigerant between each manifold section and each tube hole unit 18.

[0108] During the process of the refrigerant flowing through the manifold, it is divided into three parts for flow. One part is located in the third flow channel 20, one part is located in the fourth flow channel 21, and the other part is located in the fifth flow channel 6. The refrigerant located in the third flow channel 20, the fourth flow channel 21, and the fifth flow channel 6 is respectively output to the corresponding heat exchange tube area for heat exchange through their respective output ends. Among them, the output end of the third flow channel 20 is the first tube hole unit 181 on the first flow channel cavity 100, the output end of the fourth flow channel 21 is the second tube hole unit 182 on the first flow channel cavity 200, and the output end of the fifth flow channel 6 is the third tube hole unit 183 on the third flow channel cavity A400. Thus, the purpose of pre-shunting the refrigerant in the manifold is achieved, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube area according to the receiving requirements of the heat exchange tube area, thereby enabling uniform shunting of each heat exchange tube 14.

[0109] Specifically, the refrigerant first enters the third manifold section 3 through the open end 25 for flow. The refrigerant located in the third manifold section 3 is divided into three parts. One part flows in the third flow channel cavity A400, one part flows in the third flow channel cavity B500, and the other part flows in the third flow channel cavity C600. The refrigerant flowing in the third flow channel cavity A400 directly flows in the fifth flow channel 6 and is output to the corresponding heat exchange tube area for heat exchange through the output end of the fifth flow channel 6. The refrigerant flowing in the third flow channel cavity B500 flows through the first flow channel cavity 200 and is output to the corresponding heat exchange tube area for heat exchange at the output end of the fourth flow channel 21. The refrigerant flowing in the third flow channel cavity C600 flows through the second flow channel cavity B300 and the first flow channel cavity 100 and is output to the corresponding heat exchange tube area for heat exchange at the output end of the third flow channel 20. Thus, pre-shunting in the manifold is completed, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube area according to the receiving requirements of the heat exchange tube area, thereby enabling uniform shunting of each heat exchange tube 14, effectively improving the heat exchange efficiency of the heat exchanger where the manifold is located, reducing the power consumption of the heat exchanger, and correspondingly improving the economy and comfort of the heat exchanger.

[0110] Connected through a three - manifold pipe section, the first flow channel cavity 100 in the first manifold pipe section 1, the second flow channel cavity B300 in the second manifold pipe section 2, and the third flow channel cavity C600 in the third manifold pipe section 3 are correspondingly connected to form the third flow channel 20; the first flow channel cavity B200 arranged side by side with the second flow channel cavity B300 and the third flow channel cavity B500 in the third manifold pipe section 3 form the fourth flow channel 21; the third flow channel cavity C600 arranged side by side with the third flow channel cavity B500 forms the fifth flow channel 6 alone. This structural design is simple. Compared with the design method of setting multiple flow channel cavities in a single pipe section, this design structure can make the pipe diameter design relatively smaller, suitable for application in a smaller space. At the same time, in this manifold pipe, the refrigerant is gradually divided through each pipe section during the flow process. Compared with the way of directly dividing the flow in a single pipe section, this manifold pipe divides the refrigerant more fully and has a better flow - dividing effect.

[0111] It can be obtained from this embodiment that the manifold pipe can be composed of more manifold pipe sections. The value of n can be 3, 4, 5... By setting the corresponding number i of flow channel cavities in the corresponding manifold pipe section i, after the head - to - tail connection of multiple manifold pipe sections, the flow channel cavities in the manifold pipe section are connected correspondingly in the way of the embodiment, so as to obtain multiple flow channels. The multiple flow channels can pre - divide the refrigerant in the manifold pipe, so that the refrigerant can be dispersed and output to the corresponding heat - exchange tube areas according to the receiving requirements of the heat - exchange tube areas, and this design structure can make the pipe diameter design relatively smaller, suitable for application in a smaller space.

[0112] Optionally, in an implementation manner of this embodiment, as Figure 1 shown,

[0113] In the case of n = 1, the first through - port 8 is opened on the first transverse partition wall 24. The setting of the first through - port 8 connects the second flow channel cavity B300 with the first flow channel cavity 100. At the same time, the rest of the first transverse partition wall 24 makes the first flow channel cavity 200 not communicate with the first flow channel cavity 100.

[0114] Optionally, in an implementation manner of this embodiment, as Figure 3 、 7 shown,

[0115] In the case of n = 2, the setting of the second through - port 9 connects the second flow channel cavity B300 with the third flow channel cavity C600, and the third through - port 10 connects the first flow channel cavity B200 with the third flow channel cavity B500; at the same time, the rest of the second transverse partition wall 28 makes the first flow channel cavity 200 not communicate with the third flow channel cavity A400.

[0116] Optionally, in an implementation manner of this embodiment, as Figure 13 、 14 shown,

[0117] The open end 25 is connected with a diverter 7, and n diversion chambers are formed in the diverter 7. The n diversion chambers correspond to and communicate with the n flow channel chambers of the nth manifold pipe section one by one.

[0118] In this embodiment, the n diversion chambers formed in the diverter 7 that correspond to and communicate with the n flow channel chambers one by one facilitate the docking of the diverter 7 with the manifold pipe. The refrigerant enters the manifold pipe from the diverter 7 during the flowing process. The diverter 7 further pre-diverts the refrigerant according to the flow channel distribution in the manifold pipe, enabling the refrigerant entering the manifold pipe to flow more precisely along each flow channel. The setting of the diversion holes in the diversion chambers enables the refrigerant in the gas-liquid state to be mixed more evenly.

[0119] The diverter 7 can also be arranged between other adjacent manifold pipe sections in the manifold pipe to achieve multiple diversions of the refrigerant and increase the diversion effect.

[0120] Optionally, in an implementation manner of this embodiment, as Figure 13 、 14 shown,

[0121] At least one diversion hole is arranged in each diversion chamber, and the ratio of the total areas of the diversion holes in each diversion chamber is equal to the ratio of the refrigerant mass flow rates in the corresponding flow channels.

[0122] In this embodiment, three diversion chambers are formed in the diverter 7 that correspond to and communicate with the three flow channel chambers one by one. The three diversion chambers are the first diversion chamber B15, the second diversion chamber B16, and the third diversion chamber B19 respectively;

[0123] m first diversion holes B11 are arranged in the first diversion chamber B15, k second diversion holes B12 are arranged in the second diversion chamber B16, and p third diversion holes B13 are arranged in the third diversion chamber B19;

[0124] The total area of the m first diversion holes B11 is S1, the total area of the k second diversion holes B12 is S2, and the total area of the p third diversion holes B13 is S 3；

[0125] The mass flow rate of the refrigerant in the third flow channel 20 is q1, the mass flow rate of the refrigerant in the fourth flow channel 21 is q2, and the mass flow rate of the refrigerant in the fifth flow channel 6 is q3, where q1:q2:q3 = S1:S2:S3.

[0126] In this embodiment, the output end of the header pipe corresponds to three heat exchange zones. According to the different distribution requirements of the mass flow rate of the refrigerant in the three heat exchange pipe zones, m first shunt holes B11 are provided in the first shunt cavity B15, k second shunt holes B12 are provided in the second shunt cavity B16, and p third shunt holes B13 are provided in the third shunt cavity B19, which can not only achieve the effect of uniform mixing of the refrigerant in the gas-liquid state, but also realize the distribution requirements of the mass flow rate of the refrigerant.

[0127] Preferably, q1:q2:q3 = S1:S2:S3 = 3:5:7. The aperture diameters of the first shunt holes B11 and the third shunt holes B13 are both R1, and the aperture diameter of the second shunt hole B12 is R2, where R1 < R2. The aperture designs of the first shunt holes B11, the third shunt holes B13, and the second shunt holes B12 are more suitable for the arc-shaped structure design of the first shunt cavity B15 and the third shunt cavity B19 and the circular structure design of the second shunt cavity B16.

[0128] Optionally, in one implementation manner of this embodiment,

[0129] The heat exchange tube 14 can be any one of a straight channel, an S-shaped channel, or a U-shaped channel.

[0130] In this embodiment, the shape of the heat exchange tube 14 is not specifically limited. For example, Figure 16 As shown, the heat exchange tube 14 is straight, and multiple heat exchange tubes 14 are parallel to each other; two heat exchange tubes 14 can also be connected at one end with an elbow to form a U shape; or three heat exchange tubes 14 can be connected with elbows at different ends of adjacent two to form an S-shaped flow path.

[0131] Embodiment Two

[0132] For example, Figure 3-16 As shown, this embodiment provides a heat exchanger, including:

[0133] A first header pipe, a second header pipe 23, and multiple heat exchange tube groups connected between the first header pipe and the second header pipe 23;

[0134] The first header pipe is the header pipe in Embodiment One;

[0135] A connection port 35 for leading in or out the refrigerant is provided on the pipe wall of the second header pipe 23;

[0136] One ends of multiple heat exchange tube groups are communicated with the second header pipe 23, and the other ends are correspondingly communicated with multiple pipe hole units 18 of the first header pipe one by one.

[0137] The multiple heat exchange tube groups are microchannel heat exchange tube groups, thereby constituting a microchannel heat exchanger.

[0138] Among them, the midlines of the connection port 35 and the tube hole unit 18 are coplanar, which is conducive to the flow of the refrigerant between each heat exchange tube and the second header pipe 23.

[0139] In this embodiment, when the heat exchanger is used as an evaporator, the gas-liquid two-phase in the refrigerant enters the flow divider 7 from the refrigerant outlet pipe. After the refrigerant is turbulently flowed and mixed by each flow dividing hole in the flow divider 7, it is divided into three parts in a set ratio in the flow dividing cavity of the flow divider 7, and enters the third header pipe section 3 from the open end 25 respectively. In the third header pipe section 3, it continues to flow along the third flow channel cavity A400, the third flow channel cavity B500 and the third flow channel cavity C600 to the second header pipe section 2, and continues to flow in the first flow channel cavity B200 and the second flow channel cavity B300, and then flows to the first header pipe section 1 and flows in the first flow channel cavity 100. Thus, the refrigerant is more fully divided in the header pipes of the heat exchanger, so that the refrigerant is output to the first heat exchange tube group along the output end of the third flow channel 20, output to the second heat exchange tube group along the output end of the fourth flow channel 21, and output to the third heat exchange tube group along the output end of the fifth flow channel 6. As Figure 16 shown, the first heat exchange tube group, the second heat exchange tube group and the third heat exchange tube are arranged along their butt-jointed output ends. The three heat exchange tube groups are respectively composed of different numbers of heat exchange tubes, and the number of heat exchange tubes can be set according to the mass flow rate of the refrigerant distributed in the corresponding flow channel, so that the refrigerant as a whole is distributed to each heat exchange tube for heat exchange according to the receiving requirements of the heat exchange tube area. After the refrigerant flows through the heat exchange tube 14 and exchanges heat through the heat exchange fins 17, it is uniformly collected into the second header pipe 23 and finally flows out through the inlet pipe and enters the next process. This microchannel heat exchanger can achieve the purpose of pre-distributing the refrigerant in the header pipes, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, so that each heat exchange tube 14 can be evenly divided, thus completing the pre-distribution in the header pipes, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, thereby improving the heat exchange efficiency of the microchannel heat exchanger, reducing the power consumption of the microchannel heat exchanger, and correspondingly improving the economy and comfort of the microchannel heat exchanger.

[0140] When the heat exchanger is used as a condenser, the flow direction of the refrigerant in it is opposite to the flow direction of the refrigerant when the heat exchanger is used as an evaporator. The refrigerant from each heat exchange tube 14 enters the first header pipe section 1, the second header pipe section 2 and the third header pipe section 3 respectively, and is collected to the flow divider 7 through the third flow channel 20, the fourth flow channel 21 and the fifth flow channel 6 to enter the next process. The refrigerant flows through the flow dividing channels. Compared with flowing in a single flow channel, the multi-flow channel flow makes the refrigerant flow more smoothly.

[0141] Embodiment III

[0142] This embodiment provides a refrigeration system, as Figure 17As shown in the figure, it includes an indoor heat exchanger 33, an outdoor heat exchanger 34, a compressor 36, a throttling device 31, and a four-way reversing valve 32. The indoor heat exchanger 33 and / or the outdoor heat exchanger 34 adopt the heat exchanger of Embodiment 2.

[0143] During the operation of this refrigeration system:

[0144] The refrigerant enters the outdoor heat exchanger 34 from the compressor 36 through the four-way reversing valve 32. After being condensed, the refrigerant enters the indoor heat exchanger 33 through the throttling device 31 for evaporation heat exchange to cool the indoor environment. Finally, the refrigerant enters the compressor 36 through the four-way reversing valve 32 to continue the next cycle.

[0145] The refrigerant enters the outdoor heat exchanger 34 from the compressor 36 through the four-way reversing valve 32, releases heat for indoor heat exchange to cool the indoor environment. After being condensed, the refrigerant enters the outdoor heat exchanger 34 through the throttling device 31 for evaporation heat exchange, and then enters the compressor 36 through the four-way reversing valve 32 to continue the next cycle.

[0146] The refrigeration system adopting the heat exchanger of Embodiment 2 has a relatively high heat exchange efficiency, low power consumption, and good economy and comfort.

[0147] Embodiment 4

[0148] This embodiment provides an air conditioner, which includes the heat exchanger of Embodiment 2. The heat exchanger adopted by this air conditioner can pre-shunt the refrigerant in the header pipe, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, thereby enabling uniform shunting of each heat exchange tube 14, effectively improving the overall heat exchange efficiency of the air conditioner, reducing the overall heat exchange power consumption of the air conditioner, and correspondingly enhancing the economy and comfort of the overall air conditioner.

[0149] In summary, the ingenious concept of the header pipe lies in:

[0150] First, through the sequential connection of multiple header pipe segments, the flow channels for refrigerant flow that are not interconnected are formed between the flow channel cavities in each header pipe segment. This structural design is simple, which can pre-shunt the refrigerant in the header pipe, so that the refrigerant can be dispersed and output to the corresponding heat exchange tube areas according to the receiving requirements of the heat exchange tube areas, thereby enabling uniform shunting of each heat exchange tube. It can effectively improve the heat exchange efficiency of the header pipe. Compared with the design method of setting multiple flow channels in a single pipe, this design structure can make the pipe diameter design relatively smaller, suitable for application in smaller spaces. At the same time, in this header pipe, the refrigerant is gradually shunted through each pipe segment during the flow process. Compared with the way of directly shunting in a single pipe segment, this header pipe shunts the refrigerant more fully and has a better shunting effect.

[0151] Second, for the structural design of the flow divider, according to the different distribution requirements of the mass flow rate of the refrigerant in different heat exchange tube areas, different numbers of flow dividing holes are set in the flow dividing cavity to meet the corresponding distribution requirements of the mass flow rate of the refrigerant. The setting method of the multiple flow dividing holes enables the refrigerant in the gas-liquid state to be evenly mixed in the flow divider and enter the header pipe, further enhancing the precise distribution effect of the header pipe on the refrigerant.

[0152] It can be further understood that in the present disclosure, "multiple" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0153] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other and do not represent a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0154] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring these operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be beneficial.

[0155] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0156] It should be understood that the present disclosure is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A manifold, characterized in that, the manifold has opposite ends, one end being an open end (25) and the other end being a closed end (26); the manifold is provided with n transverse partition walls between the open end (25) and the closed end (26), and the transverse partition walls divide the manifold into n + 1 manifold segments along the axial extension direction of the tube, where n ≥ 1; the n transverse partition walls and the n + 1 manifold segments are sequentially arranged in ascending order from the closed end (26) to the open end (25) of the manifold, wherein the open end (25) is formed at the end of the (n + 1)th manifold segment away from the closed end (26); the closed end (26) is formed at the end of the 1st manifold segment away from the open end (25); each of the n + 1 manifold segments is further provided with a tube hole unit (18) on the same side wall for installing a heat exchange tube (14) and being in fluid communication with the heat exchange tube (14); each manifold segment is provided with a longitudinal partition wall, and the ith manifold segment is provided with i - 1 longitudinal partition walls. The i - 1 longitudinal partition walls divide the cavity of the ith manifold segment into i mutually independent and non - communicating flow channels. The i flow channels are arranged in ascending order according to the radial distance from the side wall with the tube hole unit (18) from near to far. The 1st flow channel closest to the tube hole unit (18) is in communication with the tube hole unit (18); n ≥ i ≥ 1; the transverse partition walls and the longitudinal partition walls are designed such that the 1st flow channels of every two adjacent manifold segments are not in communication, and the (i + 1)th flow channel of the (i + 1)th manifold segment is in communication with the ith flow channel of the ith manifold segment.

2. The manifold according to claim 1, characterized in that, each transverse partition wall is provided with a through - opening, and the through - opening is formed on the transverse partition wall and / or formed by the space between the end of the transverse partition wall and the tube wall of the manifold; the ith transverse partition wall is provided with i through - openings, and the ith through - opening of the ith transverse partition wall communicates the (i + 1)th flow channel of the (i + 1)th manifold segment with the ith flow channel of the ith manifold segment, where i ≥ 1; the through - opening is an arc - shaped structure and / or a circular structure. The arc - shaped structure has at least upper and lower arc edges at different radial positions, and the arc - shaped structure surrounds the circular structure.

3. The manifold according to claim 1, wherein all the longitudinal partition walls and the transverse partition walls in the manifold form an integral flow channel partition frame and are inserted into the manifold.

4. The manifold according to claim 1, characterized in that, When n = 1, one of the transverse partition walls includes a first transverse partition wall (24), and the first transverse partition wall (24) divides the header pipe into two header pipe segments along the axial extension direction of the pipe. The two header pipe segments are sequentially arranged in ascending order from the closed end (26) to the open end (25) of the header pipe, and are respectively a first header pipe segment (1) and a second header pipe segment (2). The open end (25) is formed at the end of the second header pipe segment (2) away from the closed end (26), and the closed end (26) is formed at the end of the first header pipe segment (1) away from the open end (25); The pipe hole unit includes a first pipe hole unit (181) opened on the first header pipe segment (1) and a second pipe hole unit (182) opened on the second header pipe segment (2); A first flow channel cavity (100) is provided in the first header pipe segment (1), and the first flow channel cavity (100) is communicated with the first pipe hole unit (181); A first longitudinal partition wall A (27) is provided in the second header pipe segment (2), and the first longitudinal partition wall A (27) divides the cavity of the second header pipe segment (2) into two independent and non - communicating flow channel cavities. The two flow channel cavities are arranged in ascending order according to the radial distance from the side wall where the second pipe hole unit (182) is opened, and are respectively a second flow channel cavity A (200) and a second flow channel cavity B (300). The second flow channel cavity A (200) is communicated with the second pipe hole unit (182); The first transverse partition wall (24) and the first longitudinal partition wall A (27) are designed such that the second flow channel cavity A (200) and the first flow channel cavity (100) are not communicated, and the second flow channel cavity B (300) is communicated with the first flow channel cavity (100); The second flow channel cavity A (200) alone constitutes the first flow channel (5) of the header pipe, and the second flow channel cavity B (300) and the first flow channel cavity (100) together constitute the second flow channel (4) of the header pipe; A first through - port (8) for communicating the second flow channel cavity B (300) with the first flow channel cavity (100) is provided on the first transverse partition wall (24).

5. The header pipe according to claim 1, wherein When n = 2, two of the transverse partition walls include a first transverse partition wall (24) and a second transverse partition wall (28). The first transverse partition wall (24) and the second transverse partition wall (28) divide the header pipe into three header pipe segments along the axial extension direction of the pipe. The three header pipe segments are sequentially arranged in ascending order from the closed end (26) to the open end (25) of the header pipe, and are respectively a first header pipe segment (1), a second header pipe segment (2), and a third header pipe segment (3). The open end (25) is formed at the end of the third header pipe segment (3) away from the closed end (26), and the closed end (26) is formed at the end of the first header pipe segment (1) away from the open end (25); The pipe hole unit (18) includes a first pipe hole unit (181) opened on the first manifold pipe section (1), a second pipe hole unit (182) opened on the second manifold pipe section (2), and a third pipe hole unit (183) opened on the third manifold pipe section (3); A first flow channel cavity (100) is provided in the first manifold pipe section (1), and the first flow channel cavity (100) communicates with the first pipe hole unit (181); A first longitudinal partition wall A (27) is provided in the second manifold pipe section (2). The first longitudinal partition wall A (27) divides the cavity of the second manifold pipe section (2) into two mutually independent and non-communicating flow channel cavities. The two flow channel cavities are arranged in ascending order according to the radial distance from the side pipe wall where the pipe hole unit (18) is opened, and are respectively a second flow channel cavity A (200) and a second flow channel cavity B (300). The second flow channel cavity A (200) communicates with the second pipe hole unit (182); A second longitudinal partition wall A (29) and a second longitudinal partition wall B (30) are provided in the third manifold pipe section (3). The second longitudinal partition wall A (29) and the second longitudinal partition wall B (30) divide the cavity of the third manifold pipe section (3) into three mutually independent and non-communicating flow channel cavities. The three flow channel cavities are arranged in ascending order according to the radial distance from the side pipe wall where the third pipe hole unit (183) is opened, and are respectively a third flow channel cavity A (400), a third flow channel cavity B (500), and a third flow channel cavity C (600). The third flow channel cavity A (400) communicates with the third pipe hole unit (183); The first transverse partition wall (24), the first longitudinal partition wall A (27), the second transverse partition wall (28), the second longitudinal partition wall A (29), and the second longitudinal partition wall B (30) are designed such that the first flow channel cavity (100), the second flow channel cavity A (200), and the third flow channel cavity A (400) are not in communication with each other. The first flow channel cavity (100), the second flow channel cavity B (300), and the third flow channel cavity C (600) are in communication and together constitute the third flow channel (20) of the manifold pipe. The third flow channel cavity B (500) communicates with the second flow channel cavity A (200) to jointly constitute the fourth flow channel (21) of the manifold pipe, and the third flow channel cavity A (400) alone constitutes the fifth flow channel (6) of the manifold pipe; A first through port (8) for communicating the second flow channel cavity B (300) with the first flow channel cavity (100) is provided on the first transverse partition wall (24); The second transverse partition wall (28) is provided with a second through port (9) and a third through port (10). The second through port (9) communicates the third flow channel cavity C (600) with the second flow channel cavity B (300), and the third through port (10) communicates the third flow channel cavity B (500) with the second flow channel cavity A (200).

6. The manifold pipe according to any one of claims 1-5, characterized in that The open end (25) is connected to a flow divider (7), and n flow dividing chambers are formed in the flow divider (7). The n flow dividing chambers correspond to and communicate with the n flow channel chambers of the nth header pipe section one by one.

7. The header pipe according to claim 6, wherein At least one flow dividing hole is provided in each of the flow dividing chambers, and the ratio of the total areas of the flow dividing holes in each flow dividing chamber is equal to the ratio of the refrigerant mass flow rates in the corresponding flow channels.

8. The header pipe according to claim 5, wherein The heat exchange tube (14) can be any one of a straight channel, an S-shaped channel or a U-shaped channel.

9. A heat exchanger, characterized in that, Comprising: A first header pipe, a second header pipe (23), and a plurality of heat exchange tube groups connected between the first header pipe and the second header pipe (23); The first header pipe is the header pipe according to any one of claims 1-8; A connection port (35) for leading in or out refrigerant is provided on the pipe wall of the second header pipe (23); One ends of the plurality of heat exchange tube groups communicate with the second header pipe (23), and the other ends communicate with the plurality of pipe hole units (18) of the first header pipe one by one.

10. The heat exchanger according to claim 9, characterized in that, The plurality of heat exchange tube groups are microchannel heat exchange tube groups.

11. A refrigeration system, characterized in that, Comprising an indoor heat exchanger (33), an outdoor heat exchanger (34), a compressor (36), a throttling device (31), and a four-way reversing valve (32). The indoor heat exchanger (33) and / or the outdoor heat exchanger (34) adopts the heat exchanger according to claim 8 or 9.

12. An air conditioner, characterized in that, Comprising an indoor heat exchanger (33) and an outdoor heat exchanger (34). The indoor heat exchanger (33) and / or the outdoor heat exchanger (34) adopts the heat exchanger according to claim 8 or 9.

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