Collecting pipe, heat exchanger and air conditioner

Abstract

The utility model discloses a collecting pipe, heat exchanger and air conditioner, the collecting pipe is provided with a plurality of branch outlets at intervals along the axial direction of the collecting pipe, the collecting pipe comprises a plurality of sub-pipes which are sequentially arranged along the axial direction of the collecting pipe, at least two adjacent sub-pipes are respectively an upstream pipe and a downstream pipe, an inner pipe structure is formed at the upstream end of the downstream pipe and extends into the downstream end of the upstream pipe, so that a buffer space is formed between the outer wall of the inner pipe structure and the inner wall of the upstream pipe, the inner pipe structure extends in the axial direction of the collecting pipe to communicate the upstream pipe with the downstream pipe, and the buffer space communicates with the upstream pipe and is isolated from the downstream pipe; the branch outlet on the upstream pipe is located at the downstream end of the upstream pipe so that the upstream pipe can flow out through the inner pipe structure and the branch outlet. According to the collecting pipe, machining is convenient, and the uniformity of refrigerant distribution and output can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technology field especially is related to a manifold, heat exchanger and air conditioner. BACKGROUND

[0002] In the related art, the manifold is often used as a refrigerant distribution device. However, in actual application, due to the inertia of the refrigerant flowing in the pipeline, the refrigerant distribution in the distal branch is excessive, while the refrigerant distribution in the proximal branch is relatively less. This uneven refrigerant distribution results in poor heat exchange capacity of the heat exchanger. SUMMARY

[0003] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a manifold, which is easy to process and beneficial to improve the uniformity of refrigerant distribution output.

[0004] The utility model further provides a heat exchanger with the manifold.

[0005] The utility model further provides an air conditioner with the heat exchanger.

[0006] According to the manifold of the first aspect of the utility model, a plurality of branch outlets are arranged on the manifold along the axial direction of the manifold, the manifold comprises a plurality of sub-pipes arranged along the axial direction of the manifold, at least two adjacent sub-pipes are an upstream pipe and a downstream pipe respectively, an inner pipe structure is formed at the upstream end of the downstream pipe and extends into the downstream end of the upstream pipe to form a buffer space between the outer wall of the inner pipe structure and the inner wall of the upstream pipe, the inner pipe structure extends along the axial direction of the manifold to communicate the upstream pipe and the downstream pipe, the buffer space communicates with the upstream pipe and is isolated from the downstream pipe, and the branch outlet on the upstream pipe is located at the downstream end of the upstream pipe, so that the upstream pipe flows out through the inner pipe structure and the branch outlet.

[0007] According to the manifold of the utility model embodiment, the manifold is easy to process and beneficial to improve the uniformity of refrigerant distribution output.

[0008] In some embodiments, the downstream pipe comprises a downstream main pipe, a tapered pipe and one inner pipe structure connected in sequence along the direction towards the upstream, the downstream main pipe and the inner pipe structure are both equal-diameter pipes, the pipe diameter of the inner pipe structure is smaller than that of the downstream main pipe, and the pipe diameter of the tapered pipe gradually decreases along the direction from the downstream main pipe to the inner pipe structure.

[0009] In some embodiments, the length of the downstream main pipe is greater than half the length of the downstream pipe, and the inner diameter of the downstream main pipe constitutes the inner diameter of the downstream pipe.

[0010] In some embodiments, the upstream pipe comprises, sequentially connected along a direction towards downstream, an upstream main pipe, a gradually expanding pipe and a sleeve pipe structure, the upstream main pipe and the sleeve pipe structure are both equal-diameter pipes, the sleeve pipe structure has a pipe diameter larger than that of the upstream main pipe, the gradually expanding pipe has a gradually increasing pipe diameter along a direction from the upstream main pipe to the sleeve pipe structure, the sleeve pipe structure is sleeved outside the downstream pipe, and the inner pipe structure extends into the upstream main pipe.

[0011] In some embodiments, the branch outlet is located upstream of the upstream end of the corresponding inner pipe structure, and the branch outlet is formed on the upstream main pipe.

[0012] In some embodiments, the length of the upstream main pipe is greater than half of the length of the upstream pipe, and the inner diameter of the upstream main pipe constitutes the inner diameter of the upstream pipe.

[0013] In some embodiments, the downstream pipe comprises, sequentially connected along a direction towards upstream, a downstream main pipe, a gradually reducing pipe and the inner pipe structure, the downstream main pipe and the inner pipe structure are both equal-diameter pipes, the inner pipe structure has a pipe diameter smaller than that of the downstream main pipe, the gradually reducing pipe has a gradually decreasing pipe diameter along a direction from the downstream main pipe to the inner pipe structure, and the sleeve pipe structure is sleeved outside the downstream main pipe.

[0014] In some embodiments, the inner diameter of the downstream main pipe is equal to the inner diameter of the upstream main pipe.

[0015] In some embodiments, the manifold satisfies at least one of the following three conditions: condition one, the ratio of the inner diameter of the inner pipe structure to the inner diameter of the corresponding branch outlet is 0.7-1.2; condition two, the ratio of the spacing between the inner pipe structure and the upstream pipe to the inner diameter of the upstream pipe is 0.05-0.4; and condition three, the branch outlet is located upstream of the corresponding inner pipe structure, and the spacing between the upstream end of the inner pipe structure and the corresponding branch outlet in the axial direction of the manifold is 0-10 mm.

[0016] In some embodiments, the upstream end of the downstream pipe is formed with a detent structure, and the detent structure is clamped outside the port of the downstream end of the upstream pipe.

[0017] In some embodiments, at least one of the sub-pipes is a flow-blocking sleeve pipe, the flow-blocking sleeve pipe is provided with the branch outlet on the side wall of the downstream end and is formed as the inner pipe structure at the upstream end.

[0018] In some embodiments, the manifold is provided with a tube inlet, the most distal outlet of the plurality of branch outlets is a distal outlet, and the inner tube structure is provided at at least one of the branch outlets other than the distal outlet.

[0019] In some embodiments, the manifold is vertically arranged, the lower part of the manifold is provided with a tube inlet, and the plurality of branch outlets are arranged in sequence upward relative to the tube inlet; and / or, among at least two adjacent branch outlets, the inner diameter of the upstream branch outlet is greater than that of the downstream branch outlet.

[0020] According to the heat exchanger of the second aspect of the present application, the heat exchanger comprises a heat exchanger body, an input pipe and an output pipe, the heat exchanger body has a plurality of parallel branches; the input pipe is the manifold according to any one of the embodiments of the first aspect of the present application, the plurality of branch outlets are in one-to-one correspondence with the inlets of the plurality of parallel branches; and the output pipe is in one-to-one correspondence with the outlets of the plurality of parallel branches.

[0021] According to the heat exchanger of the present application, the heat exchanger efficiency is improved by arranging the manifold of the first aspect.

[0022] According to the air conditioner of the third aspect of the present application, the heat exchanger of the second aspect of the present application is arranged.

[0023] According to the air conditioner of the present application, the refrigeration and heating energy efficiency of the air conditioner is improved, and the overall operation efficiency of the air conditioner and the user experience are improved by arranging the heat exchanger of the second aspect.

[0024] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of a manifold according to an embodiment of the present application;

[0026] Figure 2 is Figure 1 is a partial schematic view of the inner tube structure shown in FIG.

[0027] Figure 3 is Figure 1 is an exploded schematic view of the inner tube structure shown in FIG.

[0028] Figure 4 is a partial schematic view of the inner tube structure according to an embodiment of the present application;

[0029] Figure 5is a partial schematic view of an inner tube structure according to another embodiment of the present utility model;

[0030] Figure 6 is a partial schematic view of an inner tube structure according to another embodiment of the present utility model;

[0031] Figure 7 is a partial schematic view of an inner tube structure according to another embodiment of the present utility model;

[0032] Figure 8 is a partial schematic view of an inner tube structure according to another embodiment of the present utility model;

[0033] Figure 9 is a schematic view of a manifold according to another embodiment of the present utility model;

[0034] Figure 10 is a schematic view of a heat exchanger according to an embodiment of the present utility model;

[0035] Figure 11 is a schematic view of an air conditioner according to an embodiment of the present utility model;

[0036] Figure 12 is an experimental comparison data graph of embodiment 1 and comparative example 1.

[0037] Reference signs:

[0038] Air conditioner 10000;

[0039] Heat exchanger 1000;

[0040] Heat exchanger body 1000c; Parallel branch 1000c1; Input pipe 1000a; Output pipe 1000b;

[0041] Manifold 100; Sub pipe 4; Choke sleeve 4x;

[0042] Upstream pipe 41; Upstream main pipe 411; Gradually expanding pipe 412; Sleeve structure 413;

[0043] Downstream pipe 42; Downstream main pipe 421; Gradually shrinking pipe 422; Inner tube structure 3a; Clamping structure 424;

[0044] Pipe inlet 1; Branch outlet 2; Flow passage 31; Buffer space 3a1. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0046] Next, referring to the drawings, the manifold 100 according to the first aspect of the present application is described.

[0047] Referring to Figures 1-3 , the manifold 100 has a plurality of branch outlets 2 arranged along the axial direction of the manifold 100, the manifold 100 includes a plurality of sub-pipes 4 arranged along the axial direction of the manifold 100, at least two adjacent sub-pipes 4 are respectively an upstream pipe 41 and a downstream pipe 42, an upstream end of the downstream pipe 42 is formed with an inner pipe structure 3a and extends into a downstream end of the upstream pipe 41 to form a buffer space 3a1 between an outer wall of the inner pipe structure 3a and an inner wall of the upstream pipe 41, the inner pipe structure 3a extends along the axial direction of the manifold 100 to communicate the upstream pipe 41 and the downstream pipe 42, the buffer space 3a1 communicates with the upstream pipe 41 and is isolated from the downstream pipe 42, and the branch outlet 2 on the upstream pipe 41 is located at the downstream end of the upstream pipe 41, so that the upstream pipe 41 flows out through the inner pipe structure 3a and the branch outlet 2.

[0048] As Figure 1 indicated, the plurality of branch outlets 2 are arranged along the axial direction of the manifold 100, wherein the "axial direction of the manifold 100" is the "flow direction of the manifold 100", which refers to the flow direction of the fluid (such as refrigerant) in the manifold 100, and the fluid in the manifold 100 flows towards the downstream distal end of the manifold 100 after entering the manifold 100 from the pipe inlet 1 of the manifold 100. It is worth noting that the manifold 100 can be a straight pipe, but is not limited to a straight pipe, for example, it can also be a bent pipe, a bent pipe, etc., so the axial direction of the manifold 100 is not limited to a straight line direction.

[0049] It is worth noting that the inner pipe structure 3a extends along the axial direction of the manifold 100 to communicate the upstream pipe 41 and the downstream pipe 42, which can be understood as: the inner cavity of the inner pipe structure 3a is a flow passage 31, and a part of the refrigerant in the upstream pipe 41 can enter the downstream pipe 42 through the flow passage 31, and the remaining refrigerant in the upstream pipe 41 can flow out through the branch outlet 2 into the heat exchanger body 1000c. Wherein, "the inner pipe structure 3a extends along the axial direction of the manifold 100" is understood in a broad sense, that is, the inner pipe structure 3a can be parallel to the axis of the manifold 100, or not, as long as a part of the refrigerant in the upstream pipe 41 can enter the flow passage 31 and pass through the flow passage 31 to enter the downstream pipe 42.

[0050] In the related art, the manifold is often used as a flow distribution device for refrigerant. However, in actual application, due to the inertia of the refrigerant flowing in the pipeline, the refrigerant in the distal branch is distributed too much, while the proximal branch is relatively less. This uneven distribution of refrigerant makes the heat exchange performance of the heat exchanger using the manifold poor, and the energy efficiency of the air conditioner using the heat exchanger poor in the refrigeration and heating processes.

[0051] However, in the technical scheme of the utility model, by setting the buffer space 3a1, when the refrigerant flows from the upstream pipe 41 to the downstream pipe 42, part of the refrigerant flows into the buffer space 3a1, and the buffer space 3a1 is isolated from the downstream pipe 42. The refrigerant forms a reflected backflow in the buffer space 3a1, which disturbs the flow of the refrigerant to the inner pipe structure 3a, reduces the flow of the refrigerant into the inner pipe structure 3a, and thus promotes the flow of the refrigerant to the branch outlet 2 near the buffer space 3a1. The gaseous and liquid refrigerants are fully mixed, the influence of the inertial dynamic pressure of the refrigerant is reduced, and the refrigerant amount of the branch outlet 2 near the buffer space 3a1 is facilitated. Thus, according to the refrigerant distribution characteristics of each branch outlet 2 affected by inertia, the inner pipe structure 3a can be set at the branch outlet 2 with less refrigerant, so as to improve the refrigerant distribution uniformity of each branch outlet 2 and improve the refrigeration and heating energy efficiency of the air conditioner 10000.

[0052] In addition, the upstream end of the downstream pipe 42 is formed with the inner pipe structure 3a and extends into the downstream end of the upstream pipe 41. This nested connection makes the inner pipe structure 3a easy to process and fix to the desired position, facilitating batch efficient production of the manifold 100.

[0053] Furthermore, the manifold 100 includes a plurality of sub-pipes 4 arranged in sequence along the fluid flow direction, so that the manifold 100 is easy to expand or reduce, and the number of sub-pipes 4 can be increased or reduced according to actual needs, and is flexible to adapt to different types of heat exchangers 1000. From the production point of view, the sub-pipes 4 can be standardized, so that they can be produced in batches, improving production efficiency.

[0054] In the embodiments of the utility model, the upstream pipe 41 refers to the pipe through which the refrigerant flows first in the flow direction, and the downstream pipe 42 refers to the pipe through which the refrigerant flows later in the flow direction. The upstream pipe 41 and the downstream pipe 42 are a relative concept, and are not specific to a certain sub-pipe 4. Therefore, for some sub-pipes 4, they can serve as both upstream pipes 41 and downstream pipes 42. In addition, "communication" and "isolation" are relative to fluid flow. Communication means that fluid can flow from one place to another; isolation means that there is no fluid passage between the two places.

[0055] In the embodiments of the utility model, the number of inner pipe structures 3a formed at the upstream end of the downstream pipe 42 is not limited. For example, referring to Figure 4The upstream end of the downstream pipe 42 is formed into a plurality of inner pipe structures 3a arranged in parallel and spaced apart. Thus, by adjusting the number and spacing of the inner pipe structures 3a, the distribution and flow direction of the fluid can be more accurately controlled, meeting the needs of complex fluid systems and improving the adaptability and flexibility of the system.

[0056] In the embodiments of the present application, the cross-sectional shape of the inner pipe structure 3a is not limited, and exemplary, the cross-sectional shape of the inner pipe structure 3a can be circular, polygonal, and in addition, the cross-sectional area of the inner pipe structure 3a can be fixed or variable.

[0057] In the embodiments of the present application, the inner pipe structure 3a is arranged in the manifold 100, for example, in some embodiments, referring to Figure 5 , the inner pipe structure 3a is arranged centrally relative to the axis of the manifold 100, or for example, referring to Figure 6 , the inner pipe structure 3a is arranged offset relative to the axis of the manifold 100 towards the side wall away from the branch outlet 2. Thus, when the flow passage 31 is arranged centrally relative to the axis of the manifold 100, it helps to reduce the flow deviation and vortex phenomenon of the fluid in the manifold 100, and improves the uniformity and stability of the fluid distribution; when the flow passage 31 is arranged offset relative to the axis of the manifold 100 towards the side wall away from the branch outlet 2, the adjusting effect of the inner pipe structure 3a can be further played, so that the fluid in the manifold 100 flows more towards the branch outlet 2.

[0058] In the embodiments of the present application, the specific positional relationship between the branch outlet 2 and the inner pipe structure 3a is not limited, and exemplary, referring to Figure 5 or Figure 6 , the branch outlet 2 is arranged upstream of the inlet end of the inner pipe structure 3a. Thus, the fluid blocked by the inner pipe structure 3a can enter the branch outlet 2 upstream of the inner pipe structure 3a, so that the flow rate, flow velocity and pressure of the fluid flowing out of the branch outlet 2 can be more effectively controlled. Exemplary, referring to Figure 7 , the branch outlet 2 is arranged radially opposite to the buffer space 3a1. Thus, the fluid in the buffer space 3a1 can effectively enter the branch outlet 2, thereby improving the flow distribution ratio of the branch outlet 2.

[0059] In the embodiments of the present application, the spatial direction and shape of the manifold 100 are not limited, and the specific parameters of the manifold 100 should be matched with the heat exchanger 1000. The position of the pipe inlet 1 is not limited, and exemplary, one end of the manifold 100 is the pipe inlet 1, and the other end is plugged with a thread or a sealing piece, and the two ends should be arranged according to the flow direction of the refrigerant.

[0060] In the embodiment of the utility model, the number of sub-pipes 4 of the manifold 100 is not limited, and the number and position of branch outlets 2 on each sub-pipe 4 are not limited. Exemplarily, one branch outlet 2 is arranged on each sub-pipe 4. Exemplarily, the number of sub-pipes 4 can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc. The spacing arrangement mode of the plurality of branch outlets 2 is not limited, and exemplarily, the plurality of branch outlets 2 can be arranged at equal intervals or at variable intervals, for example, the specific spacing can be matched with the spacing of the parallel branch 1000c1 of the heat exchanger 1000.

[0061] In the embodiment of the utility model, the fluid in the manifold 100 is refrigerant (refrigerant or cold carrier, etc.), and the phase state of the refrigerant in the manifold 100 is not limited, which can be liquid phase, gas phase or gas-liquid mixed phase.

[0062] In some embodiments, referring to Figure 3 , the downstream pipe 42 comprises a downstream main pipe 421, a tapered pipe 422 and one inner pipe structure 3a connected in sequence along the direction towards the upstream, the downstream main pipe 421 and the inner pipe structure 3a are both equal-diameter pipes, the pipe diameter of the inner pipe structure 3a is smaller than that of the downstream main pipe 421, and the pipe diameter of the tapered pipe 422 gradually decreases along the direction from the downstream main pipe 421 to the inner pipe structure 3a.

[0063] In the above technical solution, the refrigerant entering the inner pipe structure 3a flows through the inner pipe structure 3a, the tapered pipe 422 and the downstream main pipe 421 in sequence, the pipe diameter of the inner pipe structure 3a is smaller than that of the downstream main pipe 421, and the tapered pipe 422 is connected between the inner pipe structure 3a and the downstream main pipe 421, so that when the fluid flows from the inner pipe structure 3a into the downstream main pipe 421, it can gradually adapt to the change of the pipe diameter, reducing the formation of fluid impact and vortex, thereby optimizing the fluid dynamics performance and reducing energy loss. In addition, the outer wall of the tapered pipe 422 makes it easy for the refrigerant to form a reflected backflow in the buffer space 3a1, increasing the disturbance to the refrigerant, thereby reducing the refrigerant flow entering the inner pipe structure 3a and forcing the refrigerant to flow more to the branch outlets 2 near the buffer space 3a1.

[0064] From the perspective of processing, exemplarily, the inner pipe structure 3a and the tapered pipe 422 can be formed by reducing the pipe diameter of the downstream main pipe 421 through the pipe reducing process, and essentially, the downstream pipe 42 is an integrated one, thereby enhancing the structural strength of the downstream pipe 42 as a whole. In addition, the tapered pipe 422 reduces stress concentration points through smooth pipe diameter change, improving the pressure resistance and service life of the pipeline. However, the inner pipe structure 3a is not limited to being processed by the pipe reducing process, and the inner pipe structure 3a can be obtained by processing the downstream pipe 42 in other ways. Exemplarily, the downstream pipe 42 can be an integrally formed piece or an integrated piece fixedly connected by multiple parts.

[0065] In some embodiments, referring to Figure 3 , the length of the downstream main pipe 421 is greater than half of the length of the downstream pipe 42, where the length refers to the dimension along the axial direction of the header 100. Thus, the downstream pipe 42 is mainly composed of the downstream main pipe 421, the length of which occupies a substantial portion of the length of the downstream pipe 42, and thus the inner diameter of the downstream main pipe 421 constitutes the inner diameter of the downstream pipe 42. Wherein, the substantial portion of the downstream pipe 42 is of an equal-diameter structure, facilitating the processing of the downstream pipe 42 and benefiting the stable flow of the refrigerant in the downstream pipe 42.

[0066] In some embodiments, referring to Figure 3 , the upstream pipe 41 comprises, in sequence along the direction toward the downstream, an upstream main pipe 411, a gradually expanding pipe 412, and a sleeve structure 413, the upstream main pipe 411 and the sleeve structure 413 are both equal-diameter pipes, the pipe diameter of the sleeve structure 413 is greater than that of the upstream main pipe 411, the pipe diameter of the gradually expanding pipe 412 gradually increases along the direction from the upstream main pipe 411 to the sleeve structure 413, the sleeve structure 413 is sleeved outside the downstream pipe 42, and the inner pipe structure 3a extends into the upstream main pipe 411.

[0067] In the above technical solution, by setting the pipe diameter of the sleeve structure 413 to be greater than that of the upstream main pipe 411, it is facilitated for the sleeve structure 413 to be smoothly sleeved outside the downstream pipe 42, reducing the difficulty of connection between the two, and from the perspective of processing, the sleeve structure 413 and the gradually expanding pipe 412 can be formed by expanding the pipe diameter of the upstream main pipe 411 by the pipe expanding process, essentially forming an integrated upstream pipe 41, thereby enhancing the structural strength of the upstream pipe 41 as a whole. In addition, the gradually expanding pipe 412 reduces stress concentration points through smooth pipe diameter changes, improving the pressure resistance and service life of the pipe. However, the sleeve structure 413 and the gradually expanding pipe 412 are not limited to being processed by the pipe expanding process, and the sleeve structure 413 and the gradually expanding pipe 412 can be obtained by other ways of processing the upstream pipe 41. Exemplarily, the upstream pipe 41 can be an integrally formed piece or an integrated piece fixedly connected by multiple parts.

[0068] In some embodiments, referring to Figure 3The branch outlet 2 is formed on the upstream main pipe 411. Thus, when the branch outlet 2 needs to be arranged upstream of the upstream end of the inner pipe structure 3a and at a distance from the upstream end of the inner pipe structure 3a, the branch outlet 2 is arranged on the upstream main pipe 411, and the position of the branch outlet 2 can be flexibly selected without increasing the length of the converging pipe 412, so that the relative position of the branch outlet 2 to the upstream end of the inner pipe structure 3a can be flexibly arranged to meet different refrigerant distribution effects according to different requirements. Of course, when the branch outlet 2 is not located upstream of the upstream end of the inner pipe structure 3a, the branch outlet 2 can also be arranged on the upstream main pipe 411.

[0069] In some embodiments, referring to Figure 3 The length of the upstream main pipe 411 is greater than half of the length of the upstream pipe 41, where the length refers to the axial dimension along the header 100. Thus, the upstream pipe 41 is mainly composed of the upstream main pipe 411, and the length of the upstream main pipe 411 accounts for a large part of the length of the upstream pipe 41, so that the inner diameter of the upstream main pipe 411 constitutes the inner diameter of the upstream pipe 41. Wherein, the upstream pipe 41 is mainly of equal diameter structure, which is convenient for processing of the upstream pipe 41 and is conducive to stable flow of the refrigerant in the upstream pipe 41.

[0070] In some embodiments, referring to Figure 3 The upstream pipe 41 includes the upstream main pipe 411, the converging pipe 412 and the sleeve structure 413 connected in sequence along the downstream direction, the upstream main pipe 411 and the sleeve structure 413 are both equal diameter pipes, and the pipe diameter of the sleeve structure 413 is greater than that of the upstream main pipe 411, the pipe diameter of the converging pipe 412 gradually increases along the direction from the upstream main pipe 411 to the sleeve structure 413, and the sleeve structure 413 is sleeved outside the downstream pipe 42, the inner pipe structure 3a extends into the upstream main pipe 411, and the downstream pipe 42 includes the downstream main pipe 421, the converging pipe 422 and the inner pipe structure 3a connected in sequence along the upstream direction, the downstream main pipe 421 and the inner pipe structure 3a are both equal diameter pipes, and the pipe diameter of the inner pipe structure 3a is smaller than that of the downstream main pipe 421, the pipe diameter of the converging pipe 422 gradually decreases along the direction from the downstream main pipe 421 to the inner pipe structure 3a, and the sleeve structure 413 is sleeved outside the downstream main pipe 421.

[0071] In the above technical solution, the sleeve structure 413 is sleeved outside the downstream main pipe 421, thereby enhancing the connection strength of the upstream pipe 41 and the downstream pipe 42, and especially in the application scenario of high pressure or high temperature of the heat exchanger 1000, the sleeve structure 413 can more effectively resist the impact of external pressure and internal fluid. The sleeve structure 413 and the downstream main pipe 421 are both provided as equal-diameter pipes, which can increase the contact area of the sleeve connection of the two, provide reliable support, enhance the overall strength of the manifold 100, and improve the durability of the manifold 100 in high pressure or harsh environments. The remaining effects can be referred to the description above, which will not be repeated here.

[0072] In some embodiments, referring to Figure 3 , the inner diameter of the downstream main pipe 421 is equal to the inner diameter of the upstream pipe 411, for example, both are D4 shown in Figure 3 . Thus, the refrigerant flowing through the upstream pipe 41 and the downstream pipe 42 in sequence will not change the flow state of the refrigerant due to the change in pipe diameter, that is, the state parameters of the refrigerant (such as flow rate, pressure, etc.) will not be affected by the change in pipe diameter, and the relatively stable state of the refrigerant reduces the variables that need to be considered for flow distribution adjustment, making flow distribution adjustment more convenient.

[0073] In addition, the inner diameter of the downstream main pipe 421 is equal to the inner diameter of the upstream pipe 411, which increases the possibility of standardization of the manifold, so that in some embodiments, the upstream pipe 41 and the downstream pipe 42 can be provided with the same specification, and can be selected in no order during assembly, thereby increasing the convenience of installation and maintenance of the manifold 100 and reducing the operation difficulty and time cost of installation.

[0074] In some embodiments, referring to Figure 8 , the manifold 100 meets at least one of the following three conditions: Condition one: the ratio of the inner diameter D1 of the inner pipe structure 3a to the inner diameter D2 of the corresponding branch outlet 2 is 0.7-1.2; Condition two: the ratio of the spacing D3 between the inner pipe structure 3a and the upstream pipe 41 to the inner diameter D4 of the upstream pipe 41 is 0.05-0.4; Condition three: the branch outlet 2 is located upstream of the corresponding inner pipe structure 3a, and the spacing A between the upstream end of the inner pipe structure 3a and the corresponding branch outlet 2 in the axial direction of the manifold 100 is 0-10 mm.

[0075] For example, referring to Figure 8 , the ratio of the inner diameter D1 of the inner pipe structure 3a to the inner diameter D2 of the corresponding branch outlet 2 is 0.7-1.2, for example, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, etc. Thus, it is conducive to adjusting the flow distribution into the inner pipe structure 3a and the branch outlet 2, reducing the refrigerant flow into the inner pipe structure 3a, thereby improving the refrigeration and heating energy efficiency of the air conditioner 10000, and improving the overall operation efficiency of the air conditioner 10000 and the user's experience.

[0076] In the embodiments of the utility model, the cross section shape of inner tube structure 3a is not limited, the cross section shape of inner tube structure 3a can be circular, polygonal, in addition, the cross section area of inner tube structure 3a can be fixed or variable. Inner tube structure 3a is equal diameter pipe, that is, the cross section area of inner tube structure 3a is equal everywhere, thereby facilitating the processing of inner tube structure 3a and the stable flow of refrigerant in inner tube structure 3a. When inner tube structure 3a is not equal diameter pipe, the inner diameter of inner tube structure 3a at any position satisfies the ratio of 0.7-1.2 with the inner diameter D2 of corresponding branch outlet 2.

[0077] Illustratively, referring to Figure 8 The ratio of the spacing D3 between inner tube structure 3a and upstream pipe 41 and the inner diameter D4 of upstream pipe 41 is 0.05-0.4, for example, 0.05, 0.1, 0.2, 0.3, 0.4, etc. Thus, it is beneficial to adjust the intensity of reflected backflow, which will hinder or disturb the flow of refrigerant to overflow passage 31, thereby indirectly adjusting the flow distribution into inner tube structure 3a and branch outlet 2, reducing the refrigerant flow into inner tube structure 3a.

[0078] Illustratively, referring to Figure 8 The branch outlet 2 is located upstream of the corresponding inner tube structure 3a, and the spacing A between the upstream end of the inner tube structure 3a and the corresponding branch outlet 2 in the axial direction of the manifold 100 is 0-10mm, for example, 0mm, 2mm, 4mm, 6mm, 8mm, 10mm, etc. Thus, the inner tube structure 3a is close to the upstream branch outlet 2, and the flow into the branch outlet 2 of the manifold 100 will be more effectively affected by the inner tube structure 3a, that is, the fluid can respond more quickly to the adjusting effect of the inner tube structure 3a, thereby improving the response speed and dynamic performance of the entire fluid system, thereby facilitating the uniformity of fluid distribution.

[0079] Wherein, the spacing A between the upstream end of the inner tube structure 3a and the corresponding branch outlet 2 in the axial direction of the manifold 100 refers to: along the fluid flow direction of the manifold 100, the minimum spacing between the inner tube structure 3a and the upstream branch outlet 2, for example, when the inner tube structure 3a is located above the branch outlet 2, the spacing between the lower edge of the inner tube structure 3a and the upper edge of the branch outlet 2.

[0080] In some embodiments, referring to Figure 8 The upstream end of downstream pipe 42 is formed with a detent structure 424, which is clamped outside the port of the downstream end of upstream pipe 41.

[0081] In the above technical solution, the relative movement of the upstream pipe 41 and the downstream pipe 42 in the axial direction (i.e. the fluid flow direction) is effectively prevented by the clamping effect of the clamping structure 424. The length of the sleeved connection between the downstream pipe 42 and the upstream pipe 41 can be limited by the setting position of the clamping structure 424, so that the relative position of the inner pipe structure 3a and the nearby branch outlet 2 is accurate, and the effectiveness of the inner pipe structure 3a in promoting the fluid into the branch outlet 2 is improved. In addition, in some embodiments, the clamping can also be used to form a predetermined position, and the two sub-pipes 4 can be reliably connected together by welding or other methods subsequently.

[0082] In the embodiments of the present application, the form of the clamping structure 424 is not limited, and exemplary clamping structures 424 can be buckles, clamping protrusions, etc. The specific form needs to be determined according to the actual application scenario.

[0083] In some embodiments, referring to Figure 1 , the at least one sub-pipe 4 is a choke sleeve 4x, and the side wall of the downstream end of the choke sleeve 4x is provided with a branch outlet 2, and the upstream end is formed into an inner pipe structure 3a. Thus, the choke sleeve 4x can serve as both the upstream pipe 41 and the downstream pipe 42, and can be mass-produced as a universal part, reducing production costs.

[0084] Exemplarily, the at least two sub-pipes 4 are both choke sleeves 4x, and serve as upstream pipes 41 and downstream pipes 42 respectively. Thus, during installation and maintenance, the upstream pipe 41 and the downstream pipe 42 only differ in the sequence of the refrigerant flowing therethrough, and can be used interchangeably, increasing the convenience of installation and maintenance of the header 100 and reducing the operation difficulty and time cost of installation. Since the number of different types of parts is reduced, inventory management can be simplified, inventory costs can be reduced, and confusion and errors caused by the large number of types of parts can be reduced.

[0085] In the embodiments of the present application, when there are multiple choke sleeves 4x, the structures of the multiple choke sleeves 4x can be the same, but the lengths can be different. In this way, choke sleeves 4x of different lengths can be selected according to the parameters of the heat exchanger 1000 to form the header 100.

[0086] In some embodiments, referring to Figure 9At least two adjacent branch outlets 2, the inner diameter of the upstream branch outlet 2 (for example, the inner diameter D5 shown in the figure) is greater than the inner diameter of the downstream branch outlet 2 (for example, the inner diameter D6 shown in the figure). Thus, by adjusting the inner diameter of the upstream and downstream branch outlets 2, the flow path and distribution ratio of the fluid in the manifold 100 can be flexibly controlled. Specifically, the large inner diameter of the upstream branch outlet 2 can reduce the resistance when the fluid passes through, so that the fluid can flow more smoothly into the upstream branch outlet 2, thereby balancing the flow distribution between the upstream and downstream branch outlets 2 to some extent, and improving the uniformity of fluid distribution of each branch outlet 2 of the manifold 100.

[0087] For example, the inner diameters of the plurality of branch outlets 2 decrease in turn along the fluid flow direction.

[0088] In some embodiments, referring to Figure 9 , the manifold 100 is vertically arranged, and the manifold 100 is provided with a pipe inlet 1 at the lower part, and the plurality of branch outlets 2 are arranged in turn upward relative to the pipe inlet 1.

[0089] Thus, under the action of gravity, the fluid in the manifold 100 is hindered from flowing too much to the distal outlet 2a in the branch outlet 2 under the action of inertia, and is promoted to enter other branch outlets 2, thereby improving the uniformity of fluid distribution of each branch outlet 2 of the manifold 100.

[0090] It is worth noting that the pipe inlet 1 is arranged at the lower part of the manifold 100, wherein the specific meaning of “lower part” is not limited, for example, it can be the pipe end of the lower part. When the lower part of the manifold 100 is a straight pipe, the pipe inlet 1 can be located at the lowermost end of the manifold 100, and when the lower part of the manifold 100 is a bent pipe (for example, as shown in the figure), the pipe inlet 1 can be located at the pipe end of the bent pipe. Figure 9

[0091] In some embodiments, referring to Figure 1 , the distal outlet 2a farthest from the pipe inlet 1 in the plurality of branch outlets 2 is provided with an inner tube structure 3a at each branch outlet 2 except the distal outlet 2a. That is, each branch outlet 2 except the distal outlet 2a is necessarily provided with an inner tube structure 3a, but for the distal outlet 2a, the inner tube structure 3a at the distal outlet 2a can be selected to be provided or not provided, that is, whether the inner tube structure 3a is provided at the distal outlet 2a is optional.

[0092] ​Therefore, when the inner tube structure 3a is arranged at each branch outlet 2 except the far-end outlet 2a, the refrigerant in each branch outlet 2 of the heat exchanger 1000 can be relatively uniform, the problem of uneven heat exchange of the heat exchanger 1000 caused by excessive refrigerant in the branch corresponding to the far-end outlet 2a and insufficient refrigerant in the branch corresponding to the near-end outlet is improved, the uniformity of fluid distribution in the header 100 is improved, the heat exchange capacity of the heat exchanger 1000 using the header 100 is improved, the refrigeration and heating energy efficiency of the air conditioner 10000 using the heat exchanger 1000 is improved, and the overall operation efficiency of the air conditioner and the user experience are improved.

[0093] Of course, the present application is not limited thereto, for example, in other embodiments of the present application, according to actual needs, the inner tube structure 3a can also not be arranged at some branch outlets 2.

[0094] Next, the heat exchanger 1000 according to the second aspect of the present application is described with reference to the accompanying drawings.

[0095] Referring to Figure 10 , the heat exchanger 1000 includes a heat exchanger body 1000c, an input pipe 1000a and an output pipe 1000b, the heat exchanger body 1000c has a plurality of parallel branches 1000c1 therein; the input pipe 1000a is the header 100 according to any one of the embodiments of the first aspect of the present application, a plurality of branch outlets 2 are in one-to-one correspondence with the inlets of a plurality of parallel branches 1000c1; the output pipe 1000b is in one-to-one correspondence with the outlets of a plurality of parallel branches 1000c1.

[0096] The heat exchanger 1000 according to the embodiments of the present application improves the uniformity of the refrigerant flow of the plurality of parallel branches 1000c1 of the heat exchanger 1000 by arranging the header 100 of the first aspect, reduces the waste of the heat exchange area of the heat exchanger 1000, and improves the refrigeration and heating energy efficiency of the heat exchanger 1000.

[0097] The specific structure of the heat exchanger body 1000c is not limited, for example, in some embodiments of the present application, the form of the heat exchanger body 1000c is not limited, the heat exchanger body 1000c can include a plurality of stacked layers of fins and heat exchange pipes penetrating the plurality of layers of fins, each parallel branch 1000c1 includes a plurality of heat exchange pipes in series and / or parallel; or in some other embodiments of the present application, the heat exchanger body 1000c can also include a plurality of flat tubes, the flat tubes have a plurality of flow channels therein, and one flat tube constitutes one parallel branch 1000c1.

[0098] Next, the air conditioner 10000 according to the third aspect of the present application is described with reference to the accompanying drawings.

[0099] Referring to Figure 11The air conditioner 10000 comprises the heat exchanger 1000 according to the second aspect of the present application.

[0100] The air conditioner 10000 according to the present application improves the overall operation efficiency of the air conditioner and the user experience.

[0101] The air conditioner 10000 can be an all-in-one air conditioner (such as a kitchen air conditioner, a mobile air conditioner, a window air conditioner, etc.) or a split air conditioner (such as a split hanging machine, a split cabinet machine, etc.).

[0102] Other components of the air conditioner 10000 according to the present application, such as air duct components and panel components, etc., and operations are known to those skilled in the art and will not be described in detail here.

[0103] Referring to Figure 12 , the experiment is compared and verified, example 1 uses the manifold 100 of the present application, and the inner tube structure 3a is arranged upstream of each branch outlet 2 except the far end outlet 2a, comparative example 1 is compared with example 1, each inner tube structure 3a is cancelled, and the rest of the experimental parameters are the same. From Figure 12 It can be seen from the above that, compared with comparative example 1, the refrigeration performance coefficient EER (Energy Efficiency Ratio) of the air conditioner is improved from 2.64 to 2.81; the heating performance coefficient COP (coefficient of performance) of the air conditioner is improved from 3.27 to 3.30, and the experimental data shows that the technical scheme of the present application can improve the refrigeration and heating performance coefficients of the air conditioner 10000, and improve the capacity efficiency of the air conditioner 10000.

[0104] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0105] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0106] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited.

[0107] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, or the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0108] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0109] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0110] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A header characterized by, The manifold has a plurality of branch outlets arranged along an axial direction of the manifold, the manifold comprises a plurality of sub-pipes arranged along an axial direction of the manifold, at least two adjacent sub-pipes are an upstream pipe and a downstream pipe respectively, an upstream end of the downstream pipe is formed with an inner pipe structure and extends into a downstream end of the upstream pipe to form a buffer space between an outer wall of the inner pipe structure and an inner wall of the upstream pipe, the inner pipe structure extends along the axial direction of the manifold to communicate the upstream pipe and the downstream pipe, the buffer space communicates with the upstream pipe and is isolated from the downstream pipe, the branch outlet on the upstream pipe is located at a downstream end of the upstream pipe, so that the upstream pipe flows out through the inner pipe structure and the branch outlet.

2. The collector according to claim 1, characterized in that The downstream pipe comprises a downstream main pipe, a taper pipe and the inner pipe structure connected in sequence along a direction towards the upstream, the downstream main pipe and the inner pipe structure are equal-diameter pipes, the pipe diameter of the inner pipe structure is smaller than that of the downstream main pipe, and the pipe diameter of the taper pipe gradually decreases along a direction from the downstream main pipe to the inner pipe structure.

3. The collector according to claim 2, characterized in that The length of the downstream main pipe is greater than half of the length of the downstream pipe, and the inner diameter of the downstream main pipe constitutes the inner diameter of the downstream pipe.

4. The collector according to claim 1, wherein The upstream pipe comprises an upstream main pipe, an expanding pipe and a sleeve structure connected in sequence along a direction towards the downstream, the upstream main pipe and the sleeve structure are equal-diameter pipes, the pipe diameter of the sleeve structure is greater than that of the upstream main pipe, the pipe diameter of the expanding pipe gradually increases along a direction from the upstream main pipe to the sleeve structure, the sleeve structure is sleeved outside the downstream pipe, and the inner pipe structure extends into the upstream main pipe.

5. The collector according to claim 4, characterized in that The branch outlet is located upstream of an upstream end of the corresponding inner pipe structure, and the branch outlet is formed on the upstream main pipe.

6. The collector according to claim 4, wherein The length of the upstream main pipe is greater than half of the length of the upstream pipe, and the inner diameter of the upstream main pipe constitutes the inner diameter of the upstream pipe.

7. The collector as claimed in claim 4, wherein The downstream pipe comprises a downstream main pipe, a taper pipe and the inner pipe structure connected in sequence along a direction towards the upstream, the downstream main pipe and the inner pipe structure are equal-diameter pipes, the pipe diameter of the inner pipe structure is smaller than that of the downstream main pipe, and the pipe diameter of the taper pipe gradually decreases along a direction from the downstream main pipe to the inner pipe structure, and the sleeve structure is sleeved outside the downstream main pipe.

8. The collector according to claim 7, characterized in that The inner diameter of the downstream main pipe is equal to the inner diameter of the upstream main pipe.

9. The collector according to claim 1, wherein The manifold satisfies at least one of the following three conditions: condition one, a ratio of the inner diameter of the inner pipe structure to the inner diameter of the corresponding branch outlet is 0.7-1.2; condition two, a ratio of a spacing between the inner pipe structure and the upstream pipe to the inner diameter of the upstream pipe is 0.05-0.4; and condition three, the branch outlet is located upstream of the corresponding inner pipe structure, and a spacing between an upstream end of the inner pipe structure and the corresponding branch outlet in the axial direction of the manifold is 0-10 mm.

10. The collector according to claim 1, wherein An upstream end of the downstream pipe is formed with a clamping structure clamped outside a port of a downstream end of the upstream pipe.

11. The collector according to claim 1, wherein At least one of the sub-pipes is a flow blocking sleeve, a side wall of a downstream end of the flow blocking sleeve is provided with the branch outlet, and an upstream end of the flow blocking sleeve is formed into the inner pipe structure.

12. The collector according to claim 1, wherein The manifold is provided with a pipe inlet, and a farthest branch outlet of the plurality of branch outlets is a far end outlet. The inner pipe structure is arranged at at least one branch outlet except the far end outlet.

13. The collector according to any one of claims 1-12, wherein, The manifold is vertically arranged, a lower part of the manifold is provided with a pipe inlet, and the plurality of branch outlets are sequentially arranged upward relative to the pipe inlet. In addition, an inner diameter of an upstream branch outlet of at least two adjacent branch outlets is greater than an inner diameter of a downstream branch outlet.

14. A heat exchanger, characterized by The heat exchanger comprises: a heat exchanger body, the heat exchanger body having a plurality of parallel branches; an input pipe, the input pipe being the manifold according to any one of claims 1-13, and a plurality of branch outlets being in one-to-one correspondence with inlets of the plurality of parallel branches; an output pipe, the output pipe being in one-to-one correspondence with outlets of the plurality of parallel branches.

15. An air conditioner characterized by comprising: The heat exchanger according to claim 14 is provided.

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