Shunt pipe, heat exchanger and air conditioner

Abstract

The flow dividing pipe comprises a first pipe body and a second pipe body, the length direction of the first pipe body is the first direction, the first pipe body is provided with a rectification channel extending in the first direction and a rectification inlet communicated with the rectification channel, and the end, away from the rectification inlet, of the first pipe body is the first end; the port of the first end is a shunting port; the second pipe body is arranged on the outer side of the first pipe body in a sleeving mode, the second pipe body is fixedly connected with the first pipe body, and a plurality of flow dividing runners which are arranged in the circumferential direction of the first pipe body at intervals and extend in the first direction are formed between the inner wall of the second pipe body and the outer wall of the first pipe body; the end, close to the diversion opening, of the second pipe body is closed and forms a diversion space with the end wall of the first end, and the diversion space communicates with the diversion opening and the diversion runners. The flowing form of the fluid in the rectifying flow channel tends to be stable, so that the fluid is uniformly dispersed around in the flowing space and enters each shunting flow channel, and the fluid entering each shunting flow channel is more uniform.

Description

Technical Field

[0001] The present application relates to the field of heat exchange, and in particular to a shunt pipe, a heat exchanger and an air conditioner. Background Art

[0002] The heat exchanger mainly includes a diverter component, a header component, flat tubes and fins. When the heat exchanger is working, the fluid entering the heat exchanger is the refrigerant, and the refrigerant is in a gas-liquid two-phase state, and the gas phase and the liquid phase are in a separated state. The refrigerant first enters the diverter component for diversion and then flows into the inlet header in the header component, and then is distributed to multiple flat tubes. Under the combined influence of gravity and the flow pattern of the refrigerant, the liquid-phase refrigerant is more likely to concentrate at the bottom of the inlet header, and the gas-phase refrigerant is more likely to concentrate at the top of the inlet header, so that the flat tubes at the bottom of the heat exchanger are mostly liquid-phase refrigerant, and the flat tubes at the top of the heat exchanger are mostly gas-phase refrigerant, resulting in uneven refrigerant separation in the heat exchanger, which accelerates the frost formation rate of the heat exchanger, and further leads to a decrease in the performance of the heat exchanger. Summary of the invention

[0003] Based on this, it is necessary to provide a splitter pipe, a heat exchanger and an air conditioner that can make the refrigerant more evenly distributed.

[0004] A shunt pipe, comprising:

[0005] A first tube body, wherein the length direction of the first tube body is defined as a first direction, the first tube body is provided with a rectifying channel extending along the first direction and a rectifying inlet connected to the rectifying channel, an end of the first tube body away from the rectifying inlet is defined as a first end, and a port of the first end is a diversion port;

[0006] A second tube body, the second tube body is sleeved on the outside of the first tube body, the second tube body is fixedly connected to the first tube body, a plurality of diversion channels are formed between the inner wall of the second tube body and the outer wall of the first tube body, the channels are arranged at intervals along the circumference of the first tube body and extend along the first direction, one end of the second tube body close to the diversion port is closed and a gap is left between the second tube body and the first end wall to form a diversion space, and the diversion space connects the diversion port and each of the diversion channels.

[0007] In one embodiment, the second tube body includes a tube body and a first cover plate, the tube body has an open end close to the diversion port, the first cover plate closes the open end, and the end wall of the first end of the first tube body at least together with the inner wall of the first cover plate forms the diversion space.

[0008] In one embodiment, the first end of the first tube is defined as the top end, and the end of the first tube away from the first end is defined as the bottom end;

[0009] The top end of the tube body is higher than the top end of the first tube body;

[0010] The first cover plate includes a top plate and a first side plate, the first side plate is extended downward from the periphery of the top plate, and the first side plate is sealed and connected to the pipe body.

[0011] In one embodiment, a convex portion extending downward along the first direction is provided at the center of the inner top surface of the top plate, at least a portion of the convex portion is aligned with the diversion port along the first direction, and the convex portion is located above the first tube body.

[0012] In one embodiment, the inner top surface of the top plate is provided with an upwardly arched arc portion, the arc portion has a guide surface for dispersing the fluid to the surroundings, and the end of the arc portion away from the top plate is located above the diversion channel.

[0013] In one embodiment, the bottom end of the tube body is open, and the second tube body further includes a second cover plate, which covers the open bottom end of the tube body, and the second cover plate has a through hole penetrating the bottom end of the first tube body.

[0014] In one embodiment, the diverter tube also includes a third tube body which is sleeved on the outside of the second tube body and fixedly connected to the second tube body, and a plurality of mutually separated diverter chambers are formed between the inner wall of the third tube body and the outer wall of the second tube body, and the plurality of diverter chambers are arranged at intervals along the first direction, and each of the diverter chambers is connected to at least one of the diverter channels, and each of the diverter channels is connected to the corresponding diverter chamber through a diverter outlet.

[0015] In one embodiment, the third tube body includes an inlet pipe section and an outlet pipe section separated from each other, at least a portion of the first tube body, at least a portion of the second tube body and a plurality of the diversion chambers are arranged in the outlet pipe section, the rectifying inlet is connected to the inlet pipe section, a fluid inlet is provided on the inlet pipe section, and the fluid inlet is connected to the rectifying inlet through the inlet pipe section.

[0016] In one embodiment, a first diaphragm is provided in the third tube body, the second tube body is sealedly connected to the first diaphragm, the first diaphragm separates the third tube body into the inlet pipe section and the outlet pipe section; and the rectifying inlet is located in the inlet pipe section.

[0017] The present application also provides a heat exchanger, comprising a diverter pipe as described in any of the above embodiments, a collecting pipe extending along the first direction, and a plurality of flat tubes arranged at intervals along the first direction, wherein the diverter pipe is provided with a plurality of fluid outlets, one ends of the plurality of flat tubes are connected to the plurality of fluid outlets one by one, and the other ends of the plurality of flat tubes are connected to the collecting pipe.

[0018] The present application also provides an air conditioner, comprising a compressor, an evaporator, a throttling device, a condenser and a connecting pipe, wherein the compressor, the evaporator, the throttling device and the condenser are connected in sequence through the connecting pipe to form a circulation loop, and at least one of the evaporator and the condenser is a heat exchanger as described in the above embodiment.

[0019] Compared with the prior art, the diverter tube provided in the present application is provided with a rectifying channel extending along the length direction of the first tube body (i.e., along the first direction). When the fluid flows into the rectifying channel from the rectifying inlet, it needs to flow in the rectifying channel for a certain distance before reaching the diverter port. At this time, the flow form of the fluid will tend to be stable. On the cross-section of the diverter port, the flow direction of the fluid is consistent and flows along the first direction and toward the diverter port. When the fluid flows into the diverter port from the diverter port and impacts the diverter space, the flow direction and impact surface of the fluid will not have an inclination angle, so that the fluid is evenly dispersed around the end wall of the first end of the first tube body in the flow space, and enters each diverter channel arranged at circumferential intervals along the first tube body, so that the fluid entering each diverter channel is relatively uniform.

[0020] In particular, when the fluid is a refrigerant in a gas-liquid two-phase state, since the flow rate of the gas-liquid two-phase refrigerant is very high, the gas-liquid two-phase refrigerant flows in the first tube body in an annular flow mode, that is, the gas-phase refrigerant flows at a higher speed in the central area of ​​the first tube body, and the liquid-phase refrigerant is pushed by the gas-phase refrigerant and flows mainly along the inner wall surface of the first tube body attached in the form of a thin layer. When the gas-liquid two-phase refrigerant in the annular flow mode enters the diversion space, the distribution of the refrigerant in the first tube body is relatively uniform and stable, so that the refrigerant can be evenly dispersed around and enter each diversion flow channel arranged at intervals along the circumference of the first tube body, so that the refrigerant entering each diversion flow channel is relatively uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1A three-dimensional diagram of a shunt tube according to an embodiment of the present application;

[0023] Figure 2 A three-dimensional diagram of a heat exchanger according to an embodiment of the present application;

[0024] Figure 3 for Figure 2 Partial cross-section at point A in the middle;

[0025] Figure 4 for Figure 2 The cross-section at point B in the middle;

[0026] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0027] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 7 Schematic diagram of the structure of an air conditioner in one embodiment of the present application.

[0029] Reference numerals: 1, air conditioner; 10, heat exchanger; 11, manifold; 12, header; 13, flat tube; 14, inlet pipe; 15, outlet pipe;

[0030] 100, first tube body; 110, first end; 101, rectification channel; 102, rectification inlet; 103, diversion outlet;

[0031] 200, second tube body; 201, flow diversion channel; 202, flow diversion space; 203, flow diversion outlet; 210, partition plate; 220, tube body; 230, first cover plate; 231, top plate; 232, first side plate; 233, convex portion; 240, second cover plate; 241, bottom plate; 242, second side plate;

[0032] 300, third tube body; 310, first septum; 320, septum with holes; 301, inlet pipe section; 302, outlet pipe section; 303, flow diversion chamber; 304, fluid outlet; 305, fluid inlet;

[0033] 20. Compressor; 30. Evaporator; 40. Throttling device; 50. Condenser; 60. Connecting pipes. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0039] See also Figure 1 The present application provides a shunt pipe 11. In this embodiment, the shunt pipe 11 is used in a heat exchanger 10. Figure 2As shown, the fluid flowing into the shunt pipe 11 is a refrigerant. However, in other embodiments, the shunt pipe 11 can also be used in other equipment that requires shunt, such as being used in the refrigeration system of an automobile engine, a data center, or a controller.

[0040] See also Figures 1 to 6 The shunt pipe 11 includes a first tube body 100 and a second tube body 200. The length direction of the first tube body 100 is defined as the first direction. The first tube body 100 is provided with a rectifying channel 101 extending along the first direction and a rectifying inlet 102 connected to the rectifying channel 101. The end of the first tube body 100 away from the rectifying inlet 102 is defined as the first end 110. The port of the first end 110 is the shunt port 103. That is, the central axis of the shunt port 103 is coaxial with the central axis of the rectifying channel 101, and both extend along the first direction. The first tube body 100 has an inner cavity, which is the rectifying channel 101.

[0041] The second tube body 200 is sleeved on the outside of the first tube body 100, and the second tube body 200 is fixedly connected to the first tube body 100. A plurality of shunt channels 201 are formed between the inner wall of the second tube body 200 and the outer wall of the first tube body 100, which are arranged at intervals along the circumference of the first tube body 100 and extend along the first direction. One end of the second tube body 200 close to the shunt port 103 is closed and a gap is left between the end wall of the first end 110 to form a shunt space 202, which connects the shunt port 103 and each shunt channel 201. The shunt space 202 is used to change the flow direction of the refrigerant in the shunt tube 11, so that the refrigerant flows from the rectification channel 101 into the shunt channel 201.

[0042] For example, the first direction is defined as the vertical direction, and the first end 110 of the first tube body 100 is the top end, that is, the diversion port 103 and the diversion space 202 are both arranged at the top end of the rectifying channel 101, and the diversion space 202 is arranged above the diversion port 103; the rectifying inlet 102 is arranged at the bottom end of the rectifying channel 101. The closed end of the second tube body 200 is its top end, and the diversion space 202 is located at the top end of the second tube body 200. At this time, please refer to Figure 4 The flow path of the refrigerant in the diverter tube 11 is: the refrigerant flows upward from the rectifying inlet 102 into the rectifying channel 101, and continues to flow upward in the rectifying channel 101 until it flows out from the diverter port 103 and enters the diverter space 202. Since the top end of the second tube body 200 is closed, the flow direction of the refrigerant will change in the diverter space 202, and then enter the various diverter channels 201 located on the outer peripheral wall of the first tube body 100, and flow downward until it flows out of each diverter channel 201. Figure 4The dashed line indicates the path of the refrigerant flow, and the arrow indicates the direction of the refrigerant flow. It should also be noted that the above upward and downward flows are only for illustration purposes, and in other embodiments, the first end 110 of the first tube 100 may also be the bottom end, or the first direction may also be defined as a horizontal direction, which is not limited in this application.

[0043] It can be understood that the diverter pipe 11 is provided with a rectifying channel 101 extending along the length direction of the first tube body 100 (i.e., along the first direction). When the refrigerant flows into the rectifying channel 101 from the rectifying inlet 102, it needs to flow a certain distance in the rectifying channel 101 before reaching the diverter port 103. At this time, the flow form of the refrigerant will tend to be stable. On the cross-section of the diverter port 103, the flow direction of the refrigerant is consistent and flows along the first direction and toward the diverter port 103. When the refrigerant flows from the diverter port 103 into the impact diverter space 202, there will be no inclination angle between the flow direction and the impact surface of the refrigerant, so that the refrigerant is evenly dispersed around the end wall of the first end 110 of the first tube body 100 in the flow space, and enters each diverter channel 201 arranged at circumferential intervals along the first tube body 100, so that the refrigerant entering each diverter channel 201 is relatively uniform.

[0044] When the fluid is a refrigerant in a gas-liquid two-phase state, since the flow velocity of the gas-liquid two-phase refrigerant is very high, the gas-liquid two-phase refrigerant flows in the first tube body 100 in an annular flow mode, that is, the gas-phase refrigerant flows at a higher speed in the central area of ​​the first tube body 100, and the liquid-phase refrigerant is pushed by the gas-phase refrigerant and mainly flows along the inner wall surface of the first tube body 100 attached in the form of a thin layer. After the gas-liquid two-phase refrigerant in the annular flow mode enters the diversion space 202, the distribution of the refrigerant in the first tube body 100 is relatively uniform and stable, so that the refrigerant can be evenly dispersed around and enter each diversion flow channel 201 arranged at intervals along the circumference of the first tube body 100, so that the refrigerant entering each diversion flow channel 201 is relatively uniform.

[0045] It should also be noted that the circumferential spacing of the diverter channel 201 along the first tube body 100 is arranged along the first direction, which means that the end of any diverter channel 201 close to the diverter port 103 is provided with an opening connecting the diverter space 202 and the diverter channel 201, and multiple openings are arranged at intervals along the circumference of the first tube body 100. The diverter channel 201 can be a linear channel or a channel spirally wound on the outer peripheral wall of the first tube body 100, as long as the diverter channel 201 can make the refrigerant flow along the first direction. It can also be understood that any diverter channel 201 is provided with a diverter port 203 for the refrigerant to flow out of the diverter channel 201.

[0046] Further, the first tube body 100 and the second tube body 200 are both round tubes, but in other embodiments, the first tube body 100 and the second tube body 200 can also be flat tubes 13, square tubes or tubes of other shapes, and the first tube body 100 and the second tube body 200 can also be tubes of different shapes, which is not limited in this application. As long as the first tube body 100 is arranged inside the second tube body 200, and the cross-sectional areas of each flow distribution channel 201 are equal on the cross section of the first end 110, it is sufficient.

[0047] It should also be noted that the second tube body 200 and the first tube body 100 can be integrally formed, or can be manufactured separately and then fixedly connected into a whole by welding, bonding or other means. The present application does not impose any restrictions on this, as long as the second tube body 200 and the first tube body 100 are fixedly connected in the shunt tube 11.

[0048] Indicatively, Figure 2 As shown, a plurality of partition plates 210 extending along the first direction are arranged between the first tube body 100 and the second tube body 200, and the plurality of partition plates 210 are arranged at intervals along the circumference of the second tube body 200, that is, the outer peripheral wall of the first tube body 100, the inner peripheral wall of the second tube body 200 and the space between two adjacent partition plates 210 form a flow diversion channel 201. In other embodiments, other structures may be arranged between the first tube body 100 and the second tube body 200 to separate the plurality of flow diversion channels 201.

[0049] Furthermore, the first tube body 100, the second tube body 200 and the plurality of partition plates 210 are integrally formed, so that not only can the cross-sectional area of ​​each diversion channel 201 be equal, but also the mechanical strength of the diversion tube 11 can be enhanced, and the manufacturing is simpler. In other embodiments, the first tube body, the second tube body and the partition plate can be formed separately and then connected; one of the first tube body and the second tube body and the partition plate can be integrally formed, and then the other of the first tube body and the second tube body can be connected to the above-mentioned integrally formed structure; multiple monomers can also be used to splice into the first tube body, the second tube body and the partition plate respectively. Schematically, in one embodiment, a hole is provided on the inner circumferential wall of the tube body of the second tube body, or a hole is provided on the outer circumferential wall of the first tube body, and the partition plate is accommodated in the hole, and then the first tube body, the second tube body and the partition plate are connected. In other embodiments, the partition plate is cylindrical, and the cross-section of the partition plate is fan-shaped (a figure surrounded by two arcs and two partial radii passing through the two ends of the two arcs), and multiple partition plates are inserted between the first tube body and the second tube body, and fixed to the first tube body and the second tube body. The present application does not impose any restrictions on this, as long as in the final shunt pipe, the second tube body is sleeved on the outside of the first tube body, and multiple partition plates divide the space between the outer peripheral wall of the first tube body and the inner peripheral wall of the second tube body into multiple shunt channels. Similarly, for the above-mentioned connection, the first tube body, the second tube body and the partition plate are preferably welded to increase the stability of the shunt pipe. In other embodiments, the first tube body, the second tube body and the partition plate can also use other connection methods, such as snap-on, mortise and tenon connection, etc., and the present application does not impose any restrictions on this.

[0050] In one embodiment, Figure 4 and Figure 5 As shown, the second tube body 200 includes a tube body 220 and a first cover plate 230. The end of the tube body 220 close to the diversion port 103 is open, and the first cover plate 230 closes the open end. The end wall of the first end 110 of the first tube body 100 is at least co-arranged with the inner wall of the first cover plate 230 to form a diversion space 202. In this way, the first cover plate 230 closes the end of the second tube body 200 close to the diversion port 103, so that the refrigerant can change its flow direction in the diversion space 202 due to hitting the inner wall of the first cover plate 230.

[0051] It is understandable that the edge of the first cover plate 230 can be sealed and connected to the inner circumferential wall or the outer circumferential wall of the tube body 220, and the present application does not limit this. And the end wall of the first end 110 of the first tube body 100 can be higher or lower than the end wall of the top of the tube body 220, and the present application does not limit this, as long as the flow-dividing space 202 is higher than the end wall of the first end 110 of the first tube body 100. It is also understandable that the end wall of the first end 110 of the first tube body 100 can also be jointly surrounded by a part of the inner circumferential wall of the tube body 220 and the inner wall of the first cover plate 230 to form the flow-dividing space 202.

[0052] Furthermore, the first cover plate 230 and the pipe body 220 are separately formed and then assembled and connected into an integral structure, so as to facilitate the production and inspection of the defective rate of the shunt pipe 11. In other embodiments, the first cover plate and the pipe body are integrally formed, and the present application does not limit this.

[0053] In one embodiment, the first end 110 of the first tube body 100 is defined as the top end, and the end of the first tube body 100 away from the first end 110 is defined as the bottom end. The top end of the tube body 220 of the second tube body 200 is higher than the top end of the first tube body 100; the first cover plate 230 includes a top plate 231 and a first side plate 232, the first side plate 232 extends downward from the top plate 231, and the first side plate 232 is sealed and connected to the tube body 220. In this way, the first cover plate 230 can be protected by the tube body 220 in the first direction and in the circumferential direction of the tube body 220.

[0054] Specifically, in this embodiment, the outer peripheral wall of the first side plate 232 is sealed and connected to the inner peripheral wall of the tube body 220. In other embodiments, the inner peripheral wall of the first side plate 232 can also be sealed and connected to the outer peripheral wall of the tube body 220. This application does not impose any restrictions on this.

[0055] In one embodiment, the shunt pipe 11 further includes a third tube body 300 sleeved on the outside of the second tube body 200, and a plurality of perforated spacers 320 arranged in sequence along the first direction are arranged inside the third tube body 300, and the second tube body 200 passes through the plurality of perforated spacers 320 in sequence, and the perforated spacers 320 are used to limit the second tube body 200 to prevent the second tube body 200 from shaking in the third tube body 300. When the second tube body 200 is placed in the third tube body 300, the second tube body 200 needs to pass through the plurality of perforated spacers 320 in sequence, and the outer peripheral wall of the first side plate 232 of the first cover plate 230 is sealed and connected to the inner peripheral wall of the tube body 220, which can reduce the size of the avoidance hole on the perforated spacer 320 for the tube body 220 to pass through. At this time, the inner peripheral wall of the avoidance hole can be closely attached to the outer peripheral wall of the tube body 220, so that the perforated spacer 320 can limit the second tube body 200.

[0056] Further, the end of the partition plate 210 close to the diversion port 103 is flush with the end wall of the first end 110 of the first tube body 100, and the end of the first side plate 232 away from the top plate 231 is overlapped on the end of the partition plate 210, so that the partition plate 210 can limit the first cover plate 230, and after the first cover plate 230 is fixed to the tube body 220, the stability of the diversion space 202 can be ensured. Schematically, the first cover plate 230 is welded to the tube body 220, and in other embodiments, the first cover plate 230 can also be fixed to the tube body 220 in other ways.

[0057] Furthermore, a convex portion 233 extending downward along the first direction is provided at the center of the top surface of the top plate 231, at least part of the convex portion 233 is aligned with the diversion port 103 along the first direction, and the convex portion 233 is located above the first tube body 100. In this way, when the refrigerant flows from the rectifying channel 101 into the diversion space 202, since the cross-sectional area of ​​the diversion space 202 is larger than the cross-sectional area of ​​the rectifying channel 101 in the first tube body 100, the refrigerant will experience a pressure drop, and since the distance between the convex portion 233 and the first tube body 100 is smaller than the distance between the top plate 231 and the first tube body 100, the refrigerant can more easily hit the convex portion 233. There is also an inclination angle between the flow direction of the refrigerant and the impact surface of the refrigerant on the convex portion 233, so that the refrigerant can be more evenly dispersed from the convex portion 233 to the surroundings of the convex portion 233, thereby making the distribution of the refrigerant in each diversion channel 201 more uniform.

[0058] Furthermore, the central axis of the protrusion 233 is coaxially arranged with the central axis of the diversion port 103 , so that the refrigerant can be dispersed around the protrusion 233 along the central axis of the protrusion 233 , thereby making the distribution of the refrigerant in each diversion channel 201 more uniform.

[0059] In other embodiments, the inner top surface of the top plate 231 may also be a plane, and the present application does not impose any limitation on this, as long as the refrigerant can impact the inner top surface of the top plate 231 when flowing from the rectification channel 101 into the diversion space 202 .

[0060] In one embodiment, an arc-shaped portion that arches upward is provided on the inner top surface of the top plate 231, and the arc-shaped portion has a guide surface for dispersing the fluid to the surroundings, and the end of the arc-shaped portion away from the top plate 231 is located above the diversion channel 201, that is, the lower edge of the arc-shaped portion is located above the diversion channel 201. In this way, when the refrigerant is dispersed from the top plate 231 of the first cover plate 230 to the surroundings of the diversion space 202, it can be more evenly distributed in the circumference of the first cover plate 230 under the guidance of the arc-shaped portion, that is, more evenly distributed in the circumference of the first tube body 100, so that the refrigerant flows into each diversion channel 201 more evenly.

[0061] It should be noted that the arcuate portion arches upward, which means that the bending direction of the arcuate portion is away from the diversion port 103. The arcuate portion may also arch toward the first side plate 232, or toward the connection between the first side plate 232 and the top plate 231. It can also be understood that, regardless of whether the convex portion 233 is provided on the inner top surface of the top plate 231 of the first cover plate 230, the arcuate portion may be provided on the inner top surface of the top plate 231.

[0062] In one embodiment, Figure 4 and Figure 6As shown, the bottom end of the tube body 220 is open, and the second tube body 200 further includes a second cover plate 240, which covers the bottom end open portion of the tube body 220, and the second cover plate 240 has a perforation for the bottom end of the first tube body 100 to penetrate, so that the rectifying inlet 102 at the bottom end of the first tube body 100 can be used for the refrigerant to flow into the rectifying channel 101. Further, since the partition plate 210 separates the first tube body 100 and the second tube body 200 into a plurality of spaced-apart shunt channels 201, when the side of the second tube body 200 is provided with a shunt outlet 203 for the refrigerant to flow out of the shunt channel 201, the bottom ends of the plurality of partition plates 210 are all connected to the top surface of the second cover plate 240, so that the second cover plate 240 can seal the bottom end of the shunt channel 201 to prevent the refrigerant from leaking.

[0063] When the diverter pipe 11 is used in a heat exchanger 10 including a plurality of flat tubes 13, the diverter outlet 203 can be directly connected to the flat tubes 13, or can be connected to the flat tubes 13 through other pipes, and a third tube body 300 can be sleeved on the outside of the second tube body 200, and the diverter outlet 203 is connected to the flat tubes 13 through the third tube body 300. The present application does not impose any restrictions on this, as long as the refrigerant can flow into the flat tubes 13.

[0064] In one embodiment, Figure 3 and Figure 4 As shown, the flow splitter 11 further includes a third tube body 300 sleeved on the outside of the second tube body 200 and fixedly connected to the second tube body 200. A plurality of mutually separated flow splitter chambers 303 are formed between the inner wall of the third tube body 300 and the outer wall of the second tube body 200. The plurality of flow splitter chambers 303 are arranged at intervals along the first direction. Each flow splitter chamber 303 is connected to at least one flow splitter channel 201. Each flow splitter channel 201 is connected to the corresponding flow splitter chamber 303 through a flow splitter outlet 203. When the flow splitter 11 is applied to a heat exchanger 10 including a plurality of flat tubes 13, the third tube body 300 is provided with at least one fluid outlet 304 at a corresponding position of any flow splitter chamber 303, so that the refrigerant can flow from the flow splitter chamber 303 into the flat tube 13.

[0065] It can be understood that a plurality of partition plates 210 are arranged between the first tube body 100 and the second tube body 200, and the plurality of partition plates 210 are arranged at intervals along the circumference of the first tube body 100 and are all extended along the first direction, so that the central axis of the plurality of flow diversion channels 201 is the same as the direction of the first direction. And each flow diversion channel 201 is connected to its corresponding flow diversion chamber 303. Schematically, a plurality of flow diversion openings are provided on the tube body 220, so that each flow diversion channel 201 is connected to its corresponding flow diversion chamber 303. Since the plurality of flow diversion chambers 303 are arranged at intervals along the first direction, the plurality of flow diversion openings are arranged in a spiral distribution on the tube body 220 of the second tube body 200. In this embodiment, a third tube body 300 is sleeved on the outside of the second tube body 200, and a plurality of flow diversion chambers 303 are provided. In this way, all fluid outlets 304 can be provided on the same side of the third tube body 300, so that a plurality of flat tubes 13 connected to the fluid outlets 304 can be arranged at intervals along the first direction on the same side of the third tube body 300, thereby reducing the volume of the heat exchanger 10.

[0066] It should be explained that there are N shunt chambers 303 and M shunt channels 201, M and N are both positive integers, and M≥N. When M is greater than N, each shunt chamber 303 is connected to at least one shunt channel 201, and each shunt channel 201 is connected to the corresponding shunt chamber 303. When M is equal to N, multiple shunt channels 201 are connected to multiple shunt chambers 303 one by one, so that the refrigerant flow rate in each shunt chamber 303 is the same, so that the refrigerant is more evenly distributed in the flat tube 13.

[0067] It is understandable that when multiple flow diversion outlets 203 are provided on each flow diversion channel 201, the multiple flow diversion outlets 203 on each flow diversion channel 201 are all opened to the same flow diversion chamber 303, so as to prevent the refrigerant from entering each flow diversion channel 201 due to diversion in the diversion space 202 and then converging in the diversion chamber 303. It is also understandable that in this embodiment, the flow diversion outlet 203 is an opening provided on the tube body 220 of the second tube body 200, but in other embodiments, the flow diversion outlet 203 can also be a channel on the tube body 220 of the second tube body 200, or other alternatives, which are not limited in the present application, as long as the flow diversion channel 201 and the corresponding flow diversion chamber 303 can be connected.

[0068] Furthermore, the third tube body 300 is provided with a plurality of fluid outlets 304 at the position of each flow-dividing chamber 303, and each fluid outlet 304 is connected to a flat tube 13, so that the refrigerant can be diverted again in each flow-dividing chamber 303, thereby making the refrigerant in each flat tube 13 more uniform. Schematically, in this embodiment, the third tube body 300 is provided with two fluid outlets 304 at the position of each flow-dividing chamber 303.

[0069] In one embodiment, Figure 4 As shown by the double dotted line in FIG. 3 , the third tube body 300 includes an inlet pipe section 301 and an outlet pipe section 302 separated from each other. At least part of the first tube body 100, at least part of the second tube body 200 and a plurality of flow dividing chambers 303 are all arranged in the outlet pipe section 302. The rectifying inlet 102 is connected to the inlet pipe section 301. The inlet pipe section 301 is provided with a fluid inlet 305, and the fluid inlet 305 is connected to the rectifying inlet 102 through the inlet pipe section 301. In other words, the first tube body 100 and the second tube body 200 are both arranged inside the third tube body 300. Figure 2 and Figure 6 Thus, when the flow divider 11 is assembled into the heat exchanger 10, the assembly process is simpler and more efficient, thereby reducing the production cost of the heat exchanger 10.

[0070] It is understandable that the fluid inlet 305 can be disposed at the end of the third tube body 300 away from the diversion space 202, or can be disposed at the side wall of the inlet pipe of the third tube body 300, and the present application does not limit this. In the present embodiment, the fluid inlet 305 is disposed at the side wall of the inlet pipe of the third tube body 300, so that the connection between the fluid inlet 305 and the inlet pipe in the heat exchanger 10 is convenient, and it is beneficial to arrange the inlet pipe in the heat exchanger 10, which is beneficial to reduce the volume of the heat exchanger 10.

[0071] In one embodiment, a first spacer 310 is provided in the third tube body 300, and the first spacer 310 divides the third tube body 300 into an inlet pipe section 301 and an outlet pipe section 302; the second tube body 200 is sealed and connected to the first spacer 310, and the rectifying inlet 102 is located in the inlet pipe section 301. It should be noted that the perforated spacer 320 is the same as the first spacer 310, and the perforated spacer located at the bottom of the third tube body 300 is defined as the first spacer 310, and the first spacer 310 divides the third tube body 300 into an inlet pipe section 301 and an outlet pipe section 302, and the perforated spacers 320 are all provided in the outlet pipe section 302, and the perforated spacers 320 divide the outlet pipe section 302 into a plurality of flow dividing chambers 303 spaced apart along the first direction.

[0072] It can be understood that the bottom end of the tube body 220 of the second tube body 200 near the rectifier inlet 102 is open, and the bottom end of the tube body 220 and the bottom ends of all partition plates 210 are sealed and connected to the first partition 310 on one side of the outlet section, that is, the first partition 310 is used as the second cover plate 240.

[0073] In one embodiment, the second tube body 200 is inserted through the first spacer 310, and at least part of the second tube body 200 is disposed in the inlet pipe section 301. The second tube body 200 includes a tube body 220 and a second cover plate 240 disposed at the bottom end of the tube body 220. The bottom end of the tube body 220 is open. The second cover plate 240 is at least partially located between the tube body 220 and the first tube body 100, and closes the open bottom end of the tube body 220. The second cover plate 240 includes a bottom plate 241 and a second side plate 242. The second side plate 242 extends upward from the circumference of the bottom plate 241. The inner peripheral wall of the second side plate 242 is sealed and connected to the outer peripheral wall of the tube body 220. The end of the second side plate 242 away from the bottom plate 241 is in contact with the perforated spacer 320. The bottom end of the first tube body 100 is inserted through the bottom plate 241. The bottom ends of the plurality of partition plates 210 are all connected to the bottom plate 241 of the second cover plate 240. In this way, when the second tube body 200 is inserted into the third tube body 300, the end of the second side plate 242 away from the bottom plate 241 abuts against the porous spacer 320, so that the second side plate 242 can limit the tube body 220, and the second side plate 242 can seal the avoidance hole in the porous spacer 320, thereby preventing the refrigerant from entering the outlet pipe section 302 from the inlet pipe section 301.

[0074] In this embodiment, the second tube body 200 is fixedly connected to the third tube body 300 by sequentially penetrating the first spacer 310 and the plurality of spacers 320 with holes. It should be noted that in this embodiment, the second tube body 200 and the third tube body 300 are connected by a snap connection, which is a detachable connection to facilitate the inspection and maintenance of the shunt tube 11. In other embodiments, the second tube body can also be integrally formed with the third tube body to improve the mechanical strength and stability of the shunt tube. Alternatively, the second tube body can also be connected to the third tube body by welding, bonding, etc., which is not limited in this application.

[0075] It should also be noted that the above-mentioned “sealed connection” refers to the fit between the two, or when they cannot fit together due to process problems, it can also be understood as a “sealed connection”, indicating that the second tube body 200 is sealed and connected to the first diaphragm 310. Since the second tube body 200 is penetrated through the first diaphragm 310 through the avoidance hole, there may be a small gap between the inner wall of the avoidance hole of the first diaphragm 310 and the second tube body 200, so that the second tube body 200 can be smoothly inserted into the avoidance hole. At this time, it should also be understood that the second tube body 200 is sealed and connected to the first diaphragm 310.

[0076] like Figure 2As shown, the present application also provides a heat exchanger 10, comprising a flow divider 11 as in any of the above embodiments, a header 12 extending along a first direction, and a plurality of flat tubes 13 spaced apart along the first direction, the flow divider 11 is provided with a plurality of fluid outlets 304, one end of the plurality of flat tubes 13 is connected to the plurality of fluid outlets 304 one by one, and the other end of the plurality of flat tubes 13 is connected to the header 12. It can be understood that the heat exchanger 10 further comprises an inlet pipe 14 and an outlet pipe 15, wherein the inlet pipe 14 is connected to the inlet pipe section 301 of the third tube body 300 of the flow divider 11 through the fluid inlet 305, and the outlet pipe 15 is connected to the header 12.

[0077] It can also be understood that since the refrigerant is distributed more evenly in each branch channel 201, when the refrigerant enters the corresponding branch chamber 303 from the branch channel 201 and then enters each flat tube 13, the distribution of the refrigerant in each flat tube 13 is more even, thereby slowing down the frosting speed of the heat exchanger 10 and improving the heat exchange performance of the heat exchanger 10.

[0078] like Figure 7 As shown, the present application also provides an air conditioner 1, comprising a compressor 20, an evaporator 30, a throttling device 40 and a condenser 50, wherein the compressor 20, the evaporator 30, the throttling device 40 and the condenser 50 are sequentially connected to form a circulation loop. At least one of the condenser 50 and the evaporator 30 uses the heat exchanger 10 in the above embodiment. Schematically, as shown Figure 7 As shown, the compressor 20, the evaporator 30, the throttling device 40 and the condenser 50 can be connected in sequence using a connecting pipe 60, or can be connected using a connecting block or a valve island. This application does not limit the connection method.

[0079] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A shunt pipe, characterized in that: include: A first tube body (100), wherein the length direction of the first tube body (100) is defined as a first direction, the first tube body (100) is provided with a rectifying channel (101) extending along the first direction and a rectifying inlet (102) connected to the rectifying channel (101), an end of the first tube body (100) away from the rectifying inlet (102) is defined as a first end (110), and a port of the first end (110) is a diversion port (103); A second tube body (200), the second tube body (200) is sleeved on the outside of the first tube body (100), the second tube body (200) is fixedly connected to the first tube body (100), a plurality of flow diversion channels (201) are formed between the inner wall of the second tube body (200) and the outer wall of the first tube body (100), the plurality of flow diversion channels (201) are arranged at intervals along the circumference of the first tube body (100) and all extend along the first direction, one end of the second tube body (200) close to the flow diversion port (103) is closed and a space is left between the end wall of the first end (110) to form a flow diversion space (202), the flow diversion space (202) is connected to the flow diversion port (103) and each of the flow diversion channels (201).

2. The shunt pipe according to claim 1, characterized in that: The second tube body (200) comprises a tube body (220) and a first cover plate (230); one end of the tube body (220) close to the diversion port (103) is open, and the first cover plate (230) closes the open end; the end wall of the first end (110) of the first tube body (100) is at least together with the inner wall of the first cover plate (230) to form the diversion space (202).

3. The shunt pipe according to claim 2, characterized in that: The first end (110) of the first tube (100) is defined as the top end, and the end of the first tube (100) away from the first end (110) is defined as the bottom end; The top end of the tube body (220) is higher than the top end of the first tube body (100); The first cover plate (230) comprises a top plate (231) and a first side plate (232), wherein the first side plate (232) extends downward from the periphery of the top plate (231), and the first side plate (232) is sealedly connected to the pipe body (220).

4. The shunt pipe according to claim 3, characterized in that: The inner top surface of the top plate (231) is provided with a convex portion (233) extending downward along the first direction, at least a portion of the convex portion (233) is aligned with the diversion port (103) along the first direction, and the convex portion (233) is located above the first tube body (100).

5. The shunt pipe according to claim 3, characterized in that: The inner top surface of the top plate (231) is provided with an upwardly arched arc portion, the arc portion having a flow guide surface for dispersing the fluid to all sides, and the end of the arc portion away from the top plate (231) is located above the diversion channel (201).

6. The shunt pipe according to claim 3, characterized in that: The bottom end of the tube body (220) is open, and the second tube body (200) further comprises a second cover plate (240), wherein the second cover plate (240) covers the open bottom end of the tube body (220), and the second cover plate (240) has a through hole penetrating the bottom end of the first tube body (100).

7. The flow divider according to any one of claims 1 to 6, characterized in that: The shunt pipe also includes a third tube body (300) which is sleeved on the outside of the second tube body (200) and fixedly connected to the second tube body (200); a plurality of mutually separated shunt chambers (303) are formed between the inner wall of the third tube body (300) and the outer wall of the second tube body (200); the plurality of shunt chambers (303) are arranged at intervals along the first direction; each of the shunt chambers (303) is connected to at least one of the shunt channels (201); and each of the shunt channels (201) is connected to the corresponding shunt chamber (303) through a shunt outlet (203).

8. The shunt pipe according to claim 7, characterized in that: The third pipe body (300) comprises an inlet pipe section (301) and an outlet pipe section (302) which are separated from each other. At least part of the first pipe body (100), at least part of the second pipe body (200) and a plurality of the flow dividing chambers (303) are arranged in the outlet pipe section (302). A fluid inlet (305) is provided on the inlet pipe section (301), and the fluid inlet (305) is connected to the rectifying inlet (102) through the inlet pipe section (301).

9. The shunt pipe according to claim 8, characterized in that: A first spacer (310) is provided in the third tube body (300), the second tube body (200) is sealedly connected to the first spacer (310), the first spacer (310) separates the third tube body (300) into the inlet pipe section (301) and the outlet pipe section (302), and the rectifying inlet (102) is located in the inlet pipe section (301).

10. A heat exchanger, characterized in that: The invention comprises a shunt pipe (11) as claimed in any one of claims 1 to 9, a collecting pipe (12) extending along the first direction, and a plurality of flat tubes (13) arranged at intervals along the first direction, wherein the shunt pipe (11) is provided with a plurality of fluid outlets (304), one ends of the plurality of flat tubes (13) are connected to the plurality of fluid outlets (304) one by one, and the other ends of the plurality of flat tubes (13) are connected to the collecting pipe (12).

11. An air conditioner, comprising a compressor (20), an evaporator (30), a throttling device (40) and a condenser (50), wherein the compressor (20), the evaporator (30), the throttling device (40) and the condenser (50) are connected in sequence to form a circulation loop, characterized in that: At least one of the evaporator (30) and the condenser (50) is the heat exchanger (10) according to claim 10.

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