Collecting pipe, heat exchanger, refrigerating system and air conditioner

Abstract

The invention 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 used for collecting and / or distributing fluid with gas-liquid phase state changes, a bubble puncturing structure is arranged in a pipe body of the collecting pipe, and the collecting pipe comprises a first cavity and a second cavity; the first cavity is provided with a first communication port for fluid circulation, and the second cavity is provided with a second communication port for fluid circulation; the first stirring and mixing part is arranged in the first cavity, a plurality of bubble puncturing structures are formed on the first stirring and mixing part, and the directions of the tips of the bubble puncturing structures are different from the flowing direction of fluid in the first cavity; the collecting pipe is divided into the two cavities, one cavity serves as the refrigerant uniform mixing cavity, the other cavity serves as the refrigerant flow dividing cavity, the first stirring and mixing part is arranged in the refrigerant flow mixing cavity, bubbles are punctured through the tip end of the bubble puncturing structure of the first stirring and mixing part, large air bomb existing in refrigerants is effectively eliminated, and therefore the phenomenon of gas-liquid layering in the refrigerants is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a collecting pipe, a heat exchanger, a refrigeration system and an air conditioner. Background Art

[0002] Among the technologies related to air conditioning heat exchangers, heat exchangers can effectively reduce the amount of refrigerant injected and improve economic efficiency, and are widely concerned by enterprises and are being researched and developed. When the heat exchanger is used as an evaporator, its inlet dryness is high, there are large gas springs in the manifold, the flow pattern is close to the spring flow, the gas-liquid stratification is obvious, and due to the influence of gravity, the upper heat exchange tubes are allocated more gas-phase refrigerant and less liquid-phase refrigerant, while the lower heat exchange tubes are allocated more liquid-phase refrigerant, resulting in serious uneven liquid distribution, which in turn affects the performance of the heat exchanger. Summary of the invention

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

[0004] The present invention aims to provide a collecting pipe for collecting and / or distributing fluid with gas-liquid phase changes, wherein a bubble puncturing structure is provided in the pipe body of the collecting pipe.

[0005] In some embodiments, a plurality of bubble puncturing structures are provided in the tube body of the manifold;

[0006] The plurality of bubble puncturing structures are distributed on the bubble generating side of the manifold.

[0007] In some embodiments, the plurality of bubble puncturing structures are arranged such that: along the fluid flow direction in the tube body of the manifold, there are more bubble puncturing structures and / or sharper bubble puncturing structures.

[0008] In some embodiments, a plurality of mixing elements are further disposed in the tube body of the collecting tube.

[0009] In some embodiments, at least a portion of the mixing element is provided with the bubble puncture structure, and the bubble puncture structure is provided at one end of the mixing element facing the flow direction of the fluid, and the multiple bubble puncture structures of the same mixing element have different orientations or the multiple bubble puncture structures of different mixing elements have different orientations.

[0010] In some embodiments, the mixing element provided with the bubble puncturing structure is composed of a plurality of cross-arranged plates, and the plurality of cross-arranged plates constitute a plurality of flow channels.

[0011] In some embodiments, at least a portion of the mixing element includes a plurality of mixing blades, which are alternately arranged along the axial direction of the collecting pipe and have a plurality of first mixing blades and a plurality of second mixing blades with different rotation directions. The plurality of first mixing blades and the plurality of second mixing blades are spirally distributed along the fluid flow direction and are located downstream of the mixing element having the bubble puncturing structure.

[0012] In some embodiments, a partition plate with a connecting hole is provided in the tube body of the collecting tube, and the partition plate divides the tube body into two cavities, one of which is used to collect the incoming fluid, and the other is used to flow out and distribute the fluid; when the collecting tube collects the incoming fluid as gas-liquid two-phase, the bubble puncturing structure is arranged on the side of the partition plate facing the cavity for collecting the incoming fluid.

[0013] In some embodiments, the manifold has two opposite ends, one of which is a closed end and the other is used as a fluid inflow or outflow side. The manifold is provided with a nozzle unit for communicating with the heat exchange tube on its wall between the two opposite ends.

[0014] The manifold comprises a first cavity and a second cavity, wherein the first cavity is arranged on the bubble generating side of the manifold, and the nozzle unit is arranged on the second cavity side and communicates with the second cavity;

[0015] a first mixing element, the first mixing element being disposed in the first cavity, a plurality of bubble puncturing structures being formed on the first mixing element, and the tip of the bubble puncturing structure being oriented in a direction different from the flow direction of the fluid in the first cavity;

[0016] The first cavity and the second cavity are connected via a connecting structure, and the fluid in the first cavity first flows through the first mixing element and then flows toward the connecting structure and enters the second cavity.

[0017] In some embodiments, a partition plate is provided in the first collecting tube, and the partition plate divides the tube cavity of the first collecting tube into the first cavity and the second cavity, and the connecting structure is a through hole opened on the partition plate, or the first collecting tube includes two independent cavities, namely the first cavity and the second cavity, and the connecting structure is a connecting pipe, which is connected between the first cavity and the second cavity.

[0018] In some embodiments, the first mixing piece includes a first mixing piece A, which includes a first plate body and a second plate body that are plugged into each other, and a plurality of bubble puncture structures are respectively formed at both ends of the first plate body, and a plurality of bubble puncture structures are respectively formed at both ends of the second plate body, and the horizontal planes where the bubble puncture structures at both ends of the first plate body are located are at a different height from the horizontal planes where the bubble puncture structures at both ends of the second plate body are located.

[0019] In some embodiments, the tip of the bubble puncturing structure is arranged facing the flow direction of the fluid in the first cavity.

[0020] In some embodiments, the first mixing element also includes a first mixing element B, the first mixing element B includes a third plate body, a fourth plate body and a fifth plate body that are plugged into each other, the third plate body, the fourth plate body and the fifth plate body are all connected to an inclined plate group, the inclined plate group includes an inclined first inclined plate and a second inclined plate, the inclination directions of the first inclined plate and the second inclined plate are different, and a plurality of bubble puncturing structures are respectively formed on the first inclined plate and the second inclined plate, and the fluid flowing into the first cavity first flows through the first mixing element A, then flows through the first mixing element B, and then flows to the connecting structure.

[0021] In some embodiments, the tip of the bubble puncturing structure of the first mixing element B is sharper than the tip of the bubble puncturing structure of the first mixing element A.

[0022] In some embodiments, the header further comprises:

[0023] The second mixing element comprises a plurality of first mixing blades and second mixing blades alternately arranged along the axial direction of the first cavity, the first mixing blades and the second mixing blades are staggered along the axial direction of the first cavity, and the fluid flowing into the first cavity first flows through the first mixing element, then flows through the second mixing element, and finally flows to the connecting structure.

[0024] In some embodiments, the minimum angle between the first mixing blade and the flow direction of the fluid in the first cavity is 15° to 45°;

[0025] The minimum angle between the second mixing blade and the flow direction of the fluid in the first cavity is 15° to 45°.

[0026] In some embodiments, a heat exchanger is provided, comprising:

[0027] a first current collecting pipe and a second current collecting pipe, wherein the first current collecting pipe and the second current collecting pipe are respectively arranged vertically;

[0028] A plurality of heat exchange tubes are connected in parallel transversely between the first header and the second header;

[0029] The first current collecting pipe and / or the second current collecting pipe are configured as the above-mentioned current collecting pipes.

[0030] In some embodiments, the plurality of heat exchange tubes form a microchannel heat exchange tube group.

[0031] 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 adopts the above-mentioned heat exchanger.

[0032] In some embodiments, an air conditioner is provided, comprising the above-mentioned refrigeration system.

[0033] The solution provided by the present invention has the following beneficial effects compared with the prior art:

[0034] The bubbles are punctured by the tip of the bubble puncturing structure to effectively eliminate the larger air bombs in the refrigerant, thereby solving the problem of gas-liquid stratification in the refrigerant. The relatively uniform refrigerant is then dispersed into each heat exchange tube. Since the bubbles are pre-eliminated in the refrigerant by the bubble puncturing structure, the refrigerant subsequently distributed to each heat exchange tube is also relatively uniform, reducing the occurrence of gas-liquid stratification, that is, more gas-phase refrigerant and less liquid-phase refrigerant is distributed to the upper heat exchange tube, and more liquid-phase refrigerant is distributed to the lower heat exchange tube, and other uneven refrigerant distribution, thereby improving the performance of the heat exchanger where the first collecting tube is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0036] Figure 1 It is one of the schematic diagrams of the first collector structure shown in an embodiment of the present invention;

[0037] Figure 2 is a side view of a partition plate shown in an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of the structure of a partition plate shown in an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a first mixing element A shown in an embodiment of the present invention;

[0040] Figure 5It is one of the structural schematic diagrams of the first mixing element B shown in an embodiment of the present invention;

[0041] Figure 6 This is the second structural schematic diagram of the first mixing element B shown in the embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of a second mixing element shown in an embodiment of the present invention;

[0043] Figure 8 This is the second schematic diagram of the first header structure shown in an embodiment of the present invention;

[0044] Fig. 9 is a partial schematic diagram of the first collector shown in an embodiment of the present invention;

[0045] Fig.10 It is a schematic diagram of the structure of a heat exchanger shown in an embodiment of the present invention.

[0046] In the figure: 1-first collecting pipe, 101-first cavity, 102-second cavity, 2-partition plate, 3-first mixing piece, 301-first mixing piece A, 3011-first plate body, 3012-second plate body, 302-first mixing piece B, 3021-third plate body, 3022-fourth plate body, 3023-fifth plate body, 303-bubble puncture structure, 4-inclined plate group, 401-first inclined plate, 402-second inclined plate, 5-second mixing piece, 501-first mixing blade, 502-second mixing blade, 6-first connecting pipe, 7-heat exchange pipe, 8-tube mouth unit, 9-second collecting pipe, 10-second connecting pipe, 11-heat dissipation fins, 12-connecting structure, 35-mixing piece.

[0047] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "contacted", and "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the related technologies of air-conditioning heat exchangers, when the heat exchanger is used as an evaporator, its inlet dryness is relatively high, there are large gas springs in the collecting pipe, the flow pattern is close to elastic flow, the gas-liquid stratification is obvious, and due to the influence of gravity, the heat exchange tubes located at the top are allocated more gas-phase refrigerant and less liquid-phase refrigerant, while the heat exchange tubes located at the bottom are allocated more liquid-phase refrigerant, resulting in serious uneven liquid distribution, which in turn affects the performance of the heat exchanger.

[0051] Based on this, the following embodiments are proposed.

[0052] Embodiment 1:

[0053] like Figure 1 , 2 As shown, a collecting pipe is used to collect and / or distribute fluid with gas-liquid phase changes, and a bubble puncturing structure 303 is provided in the pipe body of the collecting pipe.

[0054] In this embodiment, the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixed state is more prone to gas bombs, and the flow type is close to a bomb-like flow, with obvious gas-liquid stratification. The refrigerant contacts the bubble puncturing structure 303. The gas bombs, that is, the bubbles in the refrigerant are punctured after contacting the tip of the bubble puncturing structure 303, effectively eliminating the gas bombs, thereby solving the phenomenon of gas-liquid stratification in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant distribution. Since the bubbles in the refrigerant are pre-eliminated in the tube body of the collecting tube, the refrigerant subsequently distributed to each heat exchange tube is also relatively uniform, reducing the occurrence of gas-liquid stratification, that is, the upper heat exchange tube is allocated more gas-phase refrigerant and less liquid-phase refrigerant, and the lower heat exchange tube is allocated more liquid-phase refrigerant, etc., and the performance of the heat exchanger where the collecting tube is located is improved.

[0055] Optionally, in an implementation of this embodiment, as Figure 2 , 3 As shown,

[0056] A plurality of bubble puncturing structures 303 are provided in the tube body of the manifold;

[0057] A plurality of bubble puncturing structures 303 are distributed on the bubble generating side of the manifold.

[0058] In the present embodiment, the bubble generating side of the manifold, i.e., the manifold, is used in heat exchange. When the heat exchanger is used as an evaporator, its inlet dryness is relatively high, there are relatively large air bubbles in the manifold, the flow pattern is close to an elastic flow, and the gas-liquid stratification is significant. In addition, due to the influence of gravity, the upper heat exchange tubes are allocated more gas-phase refrigerant and less liquid-phase refrigerant, while the lower heat exchange tubes are allocated more liquid-phase refrigerant, resulting in serious uneven liquid distribution, which in turn affects the performance of the heat exchanger. By arranging a bubble puncturing structure 303 on this side, the bubbles are punctured, and the air bubbles are effectively eliminated, thereby solving the phenomenon of gas-liquid stratification in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant distribution.

[0059] Optionally, in an implementation of this embodiment, as Figure 2 , 3 As shown,

[0060] The plurality of bubble puncturing structures 303 are arranged such that: along the fluid flow direction in the tube body of the manifold, there are more bubble puncturing structures 303 and / or sharper bubble puncturing structures 303 .

[0061] In the present embodiment, sharper bubble puncturing structures 303 and a greater number of bubble puncturing structures 303 constitute a denser bubble puncturing structure cluster, which can relatively comprehensively cover the cross-section inside the tube body of the collecting tube, thereby achieving more comprehensive interception of bubbles in the refrigerant, effectively improving the comprehensiveness of eliminating bubbles in the refrigerant, and making the refrigerant gas-liquid mixing more uniform.

[0062] Optionally, in an implementation of this embodiment, as Figure 2 , 3 As shown,

[0063] A plurality of mixing elements 35 are also provided in the pipe body of the manifold.

[0064] At least part of the mixing element 35 is provided with a bubble puncture structure 303, and the bubble puncture structure 303 is provided at one end of the mixing element 35 facing the flow direction of the fluid, and the multiple bubble puncture structures 303 of the same mixing element 35 have different orientations or the multiple bubble puncture structures 303 of different mixing elements 35 have different orientations.

[0065] In this embodiment, the bubble puncturing structure 303 has different orientations. This design can change the flow direction of the refrigerant, strengthen the turbulence of the refrigerant fluid in the tube body of the collecting tube, and make the refrigerant gas-liquid mixing more uniform.

[0066] Optionally, in an implementation of this embodiment, as Figure 2 , 3 As shown,

[0067] The mixing element 35 provided with the bubble puncturing structure 303 is composed of a plurality of cross-arranged plates, and the plurality of cross-arranged plates constitute a plurality of flow channels.

[0068] In this embodiment, a plurality of cross-arranged plates facilitate the fixing of the bubble puncturing structure 303. The plurality of cross-arranged plates form a plurality of flow channels, which also play a role in diverting and guiding the refrigerant during the passage of the refrigerant.

[0069] Optionally, in an implementation of this embodiment, as Figure 2 , 3 As shown,

[0070] At least part of the mixing element 35 includes a plurality of mixing blades, which are alternately arranged along the axial direction of the collecting pipe and have a plurality of first mixing blades 501 and a plurality of second mixing blades 502 with different rotation directions. The plurality of first mixing blades 501 and the plurality of second mixing blades 502 are spirally distributed along the fluid flow direction and are located downstream of the mixing element 35 having the bubble puncturing structure 303.

[0071] In this embodiment, the mixing blades are spirally arranged along the fluid flow direction downstream of the mixing element 35 with the bubble puncturing structure 303, so as to further cause the refrigerant to generate swirl during the flow process, enhance the turbulence effect, further promote the uniform mixing of the gas-liquid two-phase in the refrigerant, and transform the refrigerant from an elastic flow to a fine bubble flow, thereby achieving uniform mixing between the gas-liquid two-phase refrigerant in the collecting pipe body.

[0072] Optionally, in an implementation of this embodiment, as Figure 1-3 As shown,

[0073] A partition plate 2 with a connecting hole is provided in the tube body of the collecting tube, and the partition plate divides the tube body into two cavities, one of which is used to collect the incoming fluid, and the other is used to outflow and distribute the fluid; when the collecting tube collects the incoming fluid as gas-liquid two-phase, the bubble puncturing structure 303 is arranged on the side of the partition plate facing the cavity used to collect the incoming fluid.

[0074] In this embodiment, the refrigerant first enters the cavity where the fluid flows into. During the flow in the cavity, the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixed state is more likely to have gas bombs, and the flow type is close to a bullet-like flow, with significant gas-liquid stratification. The refrigerant contacts the bubble puncture structure, and the bubbles are punctured, effectively eliminating gas bombs, thereby solving the phenomenon of gas-liquid stratification in the refrigerant. The bubble puncture structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant diversion. The relatively uniform refrigerant then flows into another cavity through the through hole, and then continues to be dispersed into each heat exchange tube.

[0075] Embodiment 2:

[0076] like Figure 1-3 As shown in , this embodiment provides a collecting pipe, including:

[0077] The manifold has two opposite ends, one of which is a closed end and the other end is used as the fluid inflow or outflow side. Between the two opposite ends of the manifold, a pipe nozzle unit 8 for communicating with the heat exchange pipe is provided on the pipe wall.

[0078] The manifold comprises a first cavity 101 and a second cavity 102, wherein the first cavity 101 is arranged on the bubble generating side of the manifold, and the nozzle unit 8 is arranged on the second cavity 102 side and communicates with the second cavity 102;

[0079] A first mixing element 3, the first mixing element 3 is disposed in the first cavity 101, a plurality of bubble puncturing structures 303 are formed on the first mixing element 3, and the tip of the bubble puncturing structure 303 faces a direction different from the flow direction of the fluid in the first cavity 101;

[0080] The first cavity 101 and the second cavity 102 are connected via the connecting structure 12 . The fluid in the first cavity 101 first flows through the first mixing element 3 and then flows to the connecting structure 12 and enters the second cavity 102 .

[0081] In this embodiment, the first manifold 1 is used in a heat exchanger, and the heat exchanger serves as an evaporator. The first manifold 1 consists of two cavities, namely a first cavity 101 and a second cavity 102. The refrigerant first enters the first cavity 101 through the first connecting port. During the flow in the first cavity 101, the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixed state is more likely to have gas bombs, and the flow pattern is close to a bullet-like flow, and the gas-liquid stratification is obvious. The refrigerant first contacts the first mixing element 3 in the first cavity 101. The gas bombs, that is, the bubbles in the refrigerant are punctured after contacting the tip of the bubble puncturing structure 303, thereby effectively eliminating the gas bombs in the first cavity 101. The air bomb in the refrigerant can solve the problem of gas-liquid stratification in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant distribution. The relatively uniform refrigerant then flows into the second cavity 102 through the connecting structure 12, and then continues to be dispersed to each heat exchange tube. Since the bubbles in the refrigerant are pre-eliminated in the first cavity 101, the refrigerant subsequently distributed to each heat exchange tube is also relatively uniform, reducing the occurrence of gas-liquid stratification, that is, the upper heat exchange tube is allocated more gas-phase refrigerant and less liquid-phase refrigerant, and the lower heat exchange tube is allocated more liquid-phase refrigerant, etc., and the performance of the heat exchanger where the first collecting tube 1 is located is improved.

[0082] Optionally, in an implementation of this embodiment, as Figure 1-3 , as shown in 8,

[0083] A partition plate 2 is provided in the first collecting tube 1, and the partition plate 2 divides the tube cavity of the first collecting tube 1 into a first cavity 101 and a second cavity 102. The connecting structure 12 is a through hole opened on the partition plate 2, or the first collecting tube 1 includes two independent cavities, namely the first cavity 101 and the second cavity 102, and the connecting structure 12 is a connecting pipe, which is connected between the first cavity 101 and the second cavity 102.

[0084] In this embodiment, two methods are used to divide the first manifold 1 into a first cavity 101 and a second cavity 102, such as Figure 1-3 As shown, one of the ways is that a partition plate 2 is arranged in the first manifold 1, and the partition plate 2 divides the tube cavity of the first manifold 1 into a first cavity 101 and a second cavity 102. The first cavity 101 and the second cavity 102 are two semicircular cavities respectively, wherein the first mixing element 3 can be connected to the partition plate 2, and the refrigerant first contacts the first mixing element 3 in the first cavity 101, and the gas bombs, that is, the bubbles in the refrigerant are punctured after contacting the tip of the bubble puncturing structure 303, which effectively eliminates the larger gas bombs in the first cavity 101, thereby solving the gas-liquid stratification phenomenon in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant diversion, and the relatively uniform refrigerant flows into the second cavity 102 through the through hole, and then continues to be dispersed into each heat exchange tube;

[0085] Another way is, Figure 8 As shown, the first cavity 101 and the second cavity 102 are two independent cavities respectively, and the connecting structure 12 is a connecting pipe, which is connected between the first cavity 101 and the second cavity 102 to form a first collecting pipe 1, wherein the first mixing element 3 can be connected to the inner wall of the first cavity 101, and the first cavity 101 serves as a refrigerant mixing cavity. The refrigerant first contacts the first mixing element 3 in the first cavity 101, and the gas bombs, that is, the bubbles in the refrigerant are punctured after contacting the tip of the bubble puncturing structure 303, which effectively eliminates the larger gas bombs in the first cavity 101, thereby solving the gas-liquid stratification phenomenon in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of uneven refrigerant diversion, and the relatively uniform refrigerant flows into the second cavity 102 through the through hole. The second cavity 102 serves as a refrigerant diversion cavity, and the refrigerant continues to be dispersed into each heat exchange tube.

[0086] Optionally, in an implementation of this embodiment, as Figure 2-4 As shown,

[0087] The first mixing piece 3 includes a first mixing piece A301, and the first mixing piece A301 includes a first plate body 3011 and a second plate body 3012 that are plugged into each other, and a plurality of bubble puncture structures 303 are respectively formed at both ends of the first plate body 3011, and a plurality of bubble puncture structures 303 are respectively formed at both ends of the second plate body 3012, and the horizontal planes where the bubble puncture structures 303 at both ends of the first plate body 3011 are located are at a different height from the horizontal planes where the bubble puncture structures 303 at both ends of the second plate body 3012 are located.

[0088] In the present embodiment, there are four bubble puncture structures 303, two of which are located at the two ends of the first plate body 3011, and the other two are located at the two ends of the second plate body 3012. Since the horizontal planes of the bubble puncture structures 303 at the two ends of the first plate body 3011 are different from the horizontal planes of the bubble puncture structures 303 at the two ends of the second plate body 3012, at least two of the four bubble puncture structures 303 are located at different heights, and the connection between the first plate body 3011 and the second plate body 3012 makes the four bubble puncture structures 303 located in different vertical planes, thereby intercepting more refrigerant in the first cavity 101, puncturing bubbles in the refrigerant, and improving the bubble elimination efficiency.

[0089] Optionally, in an implementation of this embodiment, as Figure 2-4 As shown,

[0090] The tip of the bubble puncturing structure 303 is arranged facing the flow direction of the fluid in the first cavity 101 .

[0091] The four bubble puncturing structures 303 are located at different heights in the first cavity 101 and are distributed at various positions of the cross section of the first cavity 101. The tip of the bubble puncturing structure 303 is opposite to the flow direction of the refrigerant and can directly contact the bubbles in the refrigerant, further improving the bubble elimination efficiency.

[0092] Optionally, in an implementation of this embodiment, as Figure 2 , 3 , 5, 6, 9,

[0093] The first mixing element 3 also includes a first mixing element B302, which includes a third plate body 3021, a fourth plate body 3022 and a fifth plate body 3023 that are plugged into each other, and the third plate body 3021, the fourth plate body 3022 and the fifth plate body 3023 are all connected with an inclined plate group 4, and the inclined plate group 4 includes a first inclined plate 401 and a second inclined plate 402 that are inclined. The first inclined plate 401 and the second inclined plate 402 have different inclination directions, and multiple bubble puncturing structures 303 are respectively formed on the first inclined plate 401 and the second inclined plate 402. The fluid flowing into the first cavity 101 first flows through the first mixing element A301, then flows through the first mixing element B302, and then flows to the connecting structure 12.

[0094] In this embodiment, the bubble puncture structure 303 on the first mixing element B302 has a smaller width than the bubble puncture structure 303 on the first mixing element A301. Within a certain space, this design allows more and denser bubble puncture structures 303 to be connected to the first mixing element B302. Multiple bubble puncture structures 303 form a bubble puncture structure cluster, which can relatively comprehensively cover the cross-section of the first cavity 101, thereby achieving more comprehensive interception of bubbles in the refrigerant. The first mixing element B302 and the first mixing element A301 form a double interception of the refrigerant in the first cavity 101, which effectively improves the comprehensiveness of eliminating bubbles in the refrigerant and makes the refrigerant gas-liquid mixing more uniform. At the same time, the setting of the inclined plate group 4, that is, the first inclined plate 401 and the second inclined plate 402, the first inclined plate 401 and the second inclined plate 402 are arranged in different inclination directions. This design method can change the flow direction of the refrigerant, strengthen the turbulence of the refrigerant fluid in the first cavity 101, and make the refrigerant gas-liquid mixing more uniform.

[0095] Optionally, in an implementation of this embodiment, as Figure 2 , 3 , 5, 6, 9,

[0096] The tip of the bubble puncturing structure 303 of the first mixing element B 302 is sharper than the tip of the bubble puncturing structure 303 of the first mixing element A 301 .

[0097] This design allows the first mixing element B302 to break smaller bubbles. The first mixing element B302 and the first mixing element A301 form a double interception of the refrigerant in the first cavity 101, which not only improves the comprehensiveness of eliminating bubbles in the refrigerant, but also constitutes a step-by-step breaking of the bubbles in the refrigerant, thereby achieving a more complete effect of breaking the refrigerant bubbles.

[0098] Optionally, in an implementation of this embodiment, as Figure 2 , 3 , 7,

[0099] The second mixing element 5 includes a plurality of first mixing blades 501 and second mixing blades 502 which are alternately arranged along the axial direction of the first cavity 101. The first mixing blades 501 and the second mixing blades 502 are staggered along the axial direction of the first cavity 101. The fluid flowing into the first cavity 101 first flows through the first mixing element 3, then flows through the second mixing element 5, and finally flows to the connecting structure 12.

[0100] In this embodiment, the refrigerant first contacts the first mixing element 3 in the first cavity 101. After the gas bombs, i.e., bubbles, in the refrigerant contact the tip of the bubble puncturing structure 303, the bubbles are punctured, effectively eliminating the larger gas bombs in the first cavity 101, thereby solving the gas-liquid stratification phenomenon in the refrigerant. The refrigerant continues to contact the second mixing element 5, and the first mixing blades 501 and the second mixing blades 502 are staggered along the axial direction of the first cavity 101, thereby forming alternating left and right notches with the inner wall of the first cavity 101, and multiple notches along the first cavity The first mixing blades 501 and the second mixing blades 502 which are alternately arranged axially in 101 generally form a spiral ascending shape on the partition plate 2, so that the refrigerant in the first cavity 101 generates a swirl flow during the flow, thereby enhancing the turbulence effect, further promoting the uniform mixing of the gas-liquid two-phase in the refrigerant, and transforming the refrigerant from an elastic flow to a small bubble flow, thereby achieving uniform mixing between the gas-liquid two-phase refrigerant in the first cavity 101, and then being diverted from the second cavity 102 into each heat exchange tube, thereby improving the liquid separation uniformity of each heat exchange tube and improving the performance of the microchannel heat exchanger.

[0101] Optionally, in an implementation of this embodiment, as Figure 2 , 3 , 7,

[0102] The minimum angle between the first mixing blade 501 and the flow direction of the fluid in the first cavity 101 is 15° to 45°;

[0103] The minimum angle between the second mixing blade 502 and the flow direction of the fluid in the first cavity 101 is 15° to 45°.

[0104] Preferably, the minimum angle between the first mixing blade 501 and the flow direction of the fluid in the first cavity 101 is 30°, and the minimum angle between the second mixing blade 502 and the flow direction of the fluid in the first cavity 101 is 30°.

[0105] In this embodiment, the minimum angle between the first mixing blade 501 and the second mixing blade 502 and the fluid flow direction is designed to be 30°, which can better produce a turbulent effect on the refrigerant fluid and further promote uniform mixing of the gas-liquid two phases in the refrigerant.

[0106] Embodiment 2

[0107] like Fig.10As shown, this embodiment provides a heat exchanger, comprising:

[0108] The first header 1 and the second header 9 are arranged vertically respectively;

[0109] A plurality of heat exchange tubes 7 are connected in parallel transversely between the first header 1 and the second header 9;

[0110] The first current collecting tube 1 and / or the second current collecting tube 9 are configured as the current collecting tubes in the first embodiment.

[0111] A first connecting pipe 6, the first connecting pipe 6 is connected to the first communication port of the first cavity 101;

[0112] In this embodiment, the heat exchanger serves as an evaporator, and the refrigerant first enters the first cavity 101 through the first connecting pipe 6. During the flow in the first cavity 101, the refrigerant is in a gas-liquid mixed state. The refrigerant in the gas-liquid mixed state is more prone to gas bombs, and the flow type is close to a bomb-like flow, and the gas-liquid stratification is obvious. The refrigerant first contacts the first mixing element 3 in the first cavity 101. The gas bombs, that is, the bubbles in the refrigerant are punctured after contacting the tip of the bubble puncturing structure 303, which effectively eliminates the larger gas bombs in the first cavity 101, thereby solving the gas-liquid stratification phenomenon in the refrigerant. The bubble puncturing structure 303 punctures the bubbles in the refrigerant, which can fundamentally solve the problem of refrigerant diversion. The problem of uniformity is solved, and the refrigerant contacts the second mixing element 5. The second mixing element 5 causes the refrigerant in the first cavity 101 to generate swirl during the flow, thereby enhancing the turbulence effect, further promoting the uniform mixing of the gas-liquid two-phase in the refrigerant, and transforming the refrigerant from an elastic flow to a fine bubble flow, thereby achieving uniform mixing between the gas-liquid two-phase refrigerant in the first cavity 101. The relatively uniform refrigerant then flows into the second cavity 102 through the connecting structure 12, and then continues to be dispersed into each heat exchange tube 7 through the nozzle unit 8, thereby improving the liquid separation uniformity of each heat exchange tube 7 and improving the performance of the microchannel heat exchanger. The refrigerant in each heat exchange tube 7 then flows to the second collecting pipe 9 and flows to the next link through the second connecting pipe 10.

[0113] Optionally, in an implementation of this embodiment, as Fig.10 As shown,

[0114] A plurality of heat exchange tubes 7 form a microchannel heat exchange tube group, and the microchannel heat exchange tube group is provided with heat dissipation fins 11.

[0115] The heat dissipation fins 11 on the heat exchange tubes 7 can fully play a corresponding heat dissipation role.

[0116] The heat exchanger of this embodiment can be used for the indoor heat exchanger and / or outdoor heat exchanger of a refrigeration system. When used for the indoor heat exchanger of a refrigeration system, in the cooling condition, the bubble generating side of the indoor heat exchanger is the side where the manifold is connected to the outlet end of the microchannel heat exchange tube group, and in the heating condition, the bubble generating side of the outdoor heat exchanger is the side where the manifold is connected to the outlet end of the microchannel heat exchange tube group.

[0117] Embodiment 3

[0118] This embodiment provides a refrigeration system, including an indoor heat exchanger, an outdoor heat exchanger, a compressor 36, a throttling device, and a four-way reversing valve. The indoor heat exchanger and / or the outdoor heat exchanger adopts the heat exchanger of the second embodiment.

[0119] During the operation of the refrigeration system:

[0120] The refrigerant enters the outdoor heat exchanger from the compressor through the four-way reversing valve. The condensed refrigerant passes through the throttling device and enters the indoor heat exchanger for evaporation and heat exchange to cool the room. Finally, the refrigerant enters the compressor through the four-way reversing valve to continue the next cycle.

[0121] The refrigerant enters the outdoor heat exchanger from the compressor through the four-way reversing valve, releases heat to the indoor room for cooling, and the condensed refrigerant passes through the throttling device and enters the outdoor heat exchanger for evaporation and heat exchange, and then enters the compressor through the four-way reversing valve to continue the next cycle.

[0122] The refrigeration system using the heat exchanger of the second embodiment has high heat exchange efficiency, low power consumption, good economy and comfort.

[0123] Embodiment 4

[0124] The present embodiment provides an air conditioner, including the refrigeration system of embodiment three. The refrigeration system adopted by the present air conditioner can fundamentally eliminate most of the bubbles in the refrigerant, and has the effect of disturbing the refrigerant, effectively eliminating the larger air bombs in the refrigerant, thereby solving the phenomenon of gas-liquid stratification in the refrigerant, and fundamentally solving the problem of uneven refrigerant diversion, thereby improving the overall heat exchange efficiency of the air conditioner, reducing the overall heat exchange power consumption of the air conditioner, and correspondingly improving the overall economy and comfort of the air conditioner.

[0125] In summary, the ingenious design of the collector is:

[0126] First, the bubbles are punctured by the tip of the bubble puncturing structure, which effectively eliminates the larger air bubbles in the refrigerant, thereby solving the problem of gas-liquid stratification in the refrigerant. The relatively uniform refrigerant is then dispersed into each heat exchange tube. Since the bubbles in the refrigerant are eliminated in advance by the bubble puncturing structure, the refrigerant subsequently distributed into each heat exchange tube is also relatively uniform, reducing the occurrence of gas-liquid stratification.

[0127] Secondly, by dividing the collecting pipe into two chambers, one of which is used as a refrigerant mixing chamber and the other as a refrigerant diversion chamber, a first stirring piece is set in the refrigerant mixing chamber, and the bubbles are punctured by the tip of the bubble puncturing structure of the first stirring piece, which effectively eliminates the larger air bombs in the refrigerant, thereby solving the problem of gas-liquid stratification in the refrigerant.

[0128] Third, the first mixing element is designed to be composed of a first mixing element A and a first mixing element B. The first mixing element B can connect more and denser bubble puncturing structures within a certain space. Multiple bubble puncturing structures form a bubble puncturing structure cluster, which can relatively comprehensively cover the cross-section of the first cavity, thereby achieving more comprehensive interception of bubbles in the refrigerant. The first mixing element B and the first mixing element A form a double interception of the refrigerant in the first cavity, which effectively improves the comprehensiveness of eliminating bubbles in the refrigerant, and at the same time constitutes a step-by-step crushing of the bubbles in the refrigerant, so as to achieve a more sufficient effect of crushing the refrigerant bubbles. A first inclined plate and a second inclined plate are provided, and the inclination directions of the first inclined plate and the second inclined plate are different. This design method can change the flow direction of the refrigerant, strengthen the turbulence of the refrigerant fluid in the first cavity, and make the refrigerant gas-liquid mixing more uniform.

[0129] Fourth, the first mixing blades and the second mixing blades are staggered along the axial direction of the first cavity, thereby forming alternating left and right notches with the inner wall of the first cavity, and the plurality of first mixing blades and second mixing blades arranged alternately along the axial direction of the first cavity generally form a spiral ascending shape on the partition plate, so that the refrigerant in the first cavity generates a swirl flow during the flow process, thereby enhancing the turbulence effect, further promoting the uniform mixing of the gas-liquid two phases in the refrigerant, and transforming the refrigerant from an elastic flow to a fine bubble flow.

[0130] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0131] It is further understood that the terms "first", "second", etc. are used to describe various information, but such 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 indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. 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.

[0132] It is 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 the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0133] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0134] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A manifold for collecting and / or distributing fluids with gas-liquid phase changes, characterized in that: A bubble puncturing structure (303) is provided in the tube body of the collecting tube.

2. The header according to claim 1, characterized in that: A plurality of bubble puncturing structures (303) are provided in the tube body of the collecting tube; The plurality of bubble puncturing structures (303) are distributed on the bubble generating side of the manifold.

3. The header according to claim 2, characterized in that: The plurality of bubble puncturing structures (303) are arranged such that, along the fluid flow direction in the tube body of the manifold, there are more bubble puncturing structures (303) and / or sharper bubble puncturing structures (303).

4. The header according to claim 3, characterized in that: A plurality of mixing elements (35) are also arranged in the pipe body of the collecting pipe.

5. The header according to claim 4, characterized in that: At least part of the mixing element (35) is provided with the bubble puncturing structure (303), and the bubble puncturing structure (303) is provided at one end of the mixing element (35) facing the flow direction of the fluid, and the multiple bubble puncturing structures (303) of the same mixing element (35) have different orientations or the multiple bubble puncturing structures (303) of different mixing elements (35) have different orientations.

6. The header according to claim 5, characterized in that: The mixing element (35) provided with the bubble puncturing structure (303) is composed of a plurality of cross-arranged plates, and the plurality of cross-arranged plates constitute a plurality of flow channels.

7. The header according to claim 4, characterized in that: At least part of the mixing element (35) comprises a plurality of mixing blades, wherein the plurality of mixing blades are alternately arranged along the axial direction of the manifold and have a plurality of first mixing blades (501) and a plurality of second mixing blades (502) with different rotation directions, and the plurality of first mixing blades (501) and the plurality of second mixing blades (502) are distributed in a spiral shape along the fluid flow direction and are located downstream of the mixing element (35) having the bubble puncturing structure (303).

8. The header according to claim 1, characterized in that: A partition plate (2) with a communicating hole is provided in the tube body of the collecting tube, and the partition plate divides the tube body into two cavities, one of which is used to collect the incoming fluid, and the other is used to outflow and distribute the fluid; When the fluid collected by the collecting pipe is in gas-liquid two-phase, the bubble puncturing structure (303) is arranged on the side of the partition plate facing the cavity for collecting the fluid.

9. The header according to claim 1, characterized in that: include: The collecting pipe has two opposite ends, one of which is a closed end and the other end serves as a fluid inflow or outflow side. The collecting pipe has a pipe nozzle unit (8) on its wall between the two opposite ends for communicating with the heat exchange pipe. The manifold comprises a first cavity (101) and a second cavity (102), wherein the first cavity (101) is arranged on the bubble generating side of the manifold, and the nozzle unit (8) is arranged on the second cavity (102) side and communicates with the second cavity (102); a first mixing element (3), the first mixing element (3) being arranged in the first cavity (101), a plurality of bubble puncturing structures (303) being formed on the first mixing element (3), the tip of each bubble puncturing structure (303) being oriented in a direction different from the flow direction of the fluid in the first cavity (101); The first cavity (101) and the second cavity (102) are connected via a connecting structure (12); the fluid in the first cavity (101) first flows through the first mixing element (3) and then flows toward the connecting structure (12) and enters the second cavity (102).

10. The header according to claim 9, characterized in that: A partition plate (2) is provided inside the collecting pipe (1), and the partition plate (2) divides the tube cavity of the collecting pipe (1) into the first cavity (101) and the second cavity (102); the connecting structure (12) is a through hole opened on the partition plate (2); or, the first collecting pipe (1) includes two independent cavities, namely the first cavity (101) and the second cavity (102); the connecting structure (12) is a connecting pipe, and the connecting pipe is connected between the first cavity (101) and the second cavity (102).

11. The header according to claim 9, characterized in that: The first mixing piece (3) comprises a first mixing piece A (301), the first mixing piece A (301) comprises a first plate body (3011) and a second plate body (3012) which are plugged into each other, a plurality of bubble puncturing structures (303) are respectively formed at two ends of the first plate body (3011), a plurality of bubble puncturing structures (303) are respectively formed at two ends of the second plate body (3012), and the bubble puncturing structures (303) located at two ends of the first plate body (3011) are located at a horizontal plane at a different height from the bubble puncturing structures (303) located at two ends of the second plate body (3012).

12. The header according to claim 9, characterized in that: The tip of the bubble puncturing structure (303) is arranged facing the flow direction of the fluid in the first cavity (101).

13. The header according to claim 11, characterized in that: The first mixing element (3) further comprises a first mixing element B (302), the first mixing element B (302) comprising a third plate body (3021), a fourth plate body (3022) and a fifth plate body (3023) which are plugged into each other, the third plate body (3021), the fourth plate body (3022) and the fifth plate body (3023) are all connected with an inclined plate group (4), the inclined plate group (4) comprises a first inclined plate (401) and a second inclined plate (402) which are arranged obliquely, the first inclined plate (401) and the second inclined plate (402) having different inclination directions, a plurality of bubble puncturing structures (303) are respectively formed on the first inclined plate (401) and the second inclined plate (402), and the fluid flowing into the first cavity (101) first flows through the first mixing element A (301), then flows through the first mixing element B (302), and then flows to the connecting structure (12).

14. The header according to claim 13, characterized in that: The tip of the bubble puncturing structure (303) of the first mixing element B (302) is sharper than the tip of the bubble puncturing structure (303) of the first mixing element A (301).

15. The header according to claim 9, characterized in that: The collector also includes: A second mixing element (5), wherein the second mixing element (5) comprises a plurality of first mixing blades (501) and second mixing blades (502) which are alternately arranged along the axial direction of the first cavity (101), wherein the first mixing blades (501) and the second mixing blades (502) are alternately arranged along the axial direction of the first cavity (101), and the fluid flowing into the first cavity (101) first flows through the first mixing element (3), then flows through the second mixing element (5), and then flows to the connecting structure (12).

16. The header according to claim 15, characterized in that: The minimum angle between the first mixing blade (501) and the flow direction of the fluid in the first cavity (101) is 15° to 45°; The minimum angle between the second mixing blade (502) and the flow direction of the fluid in the first cavity (101) is 15° to 45°.

17. A heat exchanger, characterized in that: include: A first current collecting pipe (1) and a second current collecting pipe (9), wherein the first current collecting pipe (1) and the second current collecting pipe (9) are respectively arranged vertically; A plurality of heat exchange tubes (7) are connected in parallel transversely between the first header (1) and the second header (9); The first current collecting tube (1) and / or the second current collecting tube (9) is configured as a current collecting tube according to any one of claims 1 to 16.

18. The heat exchanger according to claim 17, characterized in that The multiple heat exchange tubes (7) form a microchannel heat exchange tube group.

19. A refrigeration system, characterized in that: It includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling device, and a four-way reversing valve. The indoor heat exchanger and / or the outdoor heat exchanger adopts the heat exchanger described in claim 17 or 18.

20. An air conditioner, characterized in that: Comprising the refrigeration system of claim 19.

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