Refrigerant distribution structure and heat exchanger having the same

Abstract

The present invention relates to the technical field of heat exchangers, and particularly to a refrigerant distribution structure and a heat exchanger having the same. The refrigerant distribution structure includes a distribution pipe and a plurality of ejector pipes. The distribution pipe has a first chamber, and a plurality of injection holes are formed in the side wall of the distribution pipe. The plurality of ejector pipes are installed in the first chamber at intervals. One end of the ejector pipe penetrates through the inner wall of the first chamber and is communicated with the manifold, and the other end of the ejector pipe passes through the injection hole and forms an injection channel with the injection hole. The injection channel is communicated with the first chamber and the manifold respectively. The advantages of the present invention are as follows: It can eject the liquid refrigerant through the ejector pipe in a timely and rapid manner, which is beneficial to the uniform distribution of the gas-liquid two-phase refrigerant, shortens the distribution time, improves the distribution efficiency, and improves the heat exchange efficiency; when the distribution pipe works, the flow rate of the gaseous refrigerant is relatively high, and the gaseous refrigerant can be directly ejected through the injection hole, thereby generating an ejecting effect and ejecting the liquid refrigerant at the bottom of the manifold through the ejector pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a refrigerant distribution structure and a heat exchanger having the same. Background Art

[0002] The refrigerant distribution structure of a heat exchanger is used to distribute refrigerant to ensure uniform mixing of the refrigerant, so that the heat exchange of the heat exchanger is uniform.

[0003] The existing refrigerant distribution structure includes a distribution pipe with a plurality of distribution holes formed therein. After the gas-liquid two-phase refrigerant enters the distribution pipe, it is ejected from each distribution hole to enhance the heat exchange capacity of the heat exchanger.

[0004] However, this refrigerant distribution structure has a poor effect in heat exchangers with larger sizes, which will lead to a reduction in the heat exchange efficiency of the heat exchanger. Summary of the Invention

[0005] In view of this, in order to solve the above technical problems, it is necessary to provide a refrigerant distribution structure and a heat exchanger having the same, which have a simple structure, high efficiency, uniform distribution, and good heat exchange effect.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A refrigerant distribution structure is at least partially disposed in a header pipe. The refrigerant distribution structure includes a distribution pipe and a plurality of ejector pipes. The distribution pipe has a first chamber, and a plurality of injection holes are formed in the side wall of the distribution pipe. The plurality of ejector pipes are installed in the first chamber at intervals. One end of the ejector pipe penetrates through the inner wall of the first chamber and communicates with the header pipe, and the other end of the ejector pipe penetrates through the injection hole and forms an injection channel with the injection hole. The injection channel communicates with the first chamber and the header pipe respectively.

[0008] In the present application, by providing a plurality of ejector pipes, the liquid refrigerant can be ejected in time and quickly through the ejector pipes, which is beneficial to the uniform distribution of the gas-liquid two-phase refrigerant, shortens the distribution time, improves the distribution efficiency, and thus improves the heat exchange efficiency. When the distribution pipe works, the refrigerant in the distribution pipe is a gas-liquid two-phase refrigerant. Because the flow rate of the gaseous refrigerant is relatively high, the gaseous refrigerant can be directly ejected through the injection channel. The high-speed flowing gaseous refrigerant will form a negative pressure, thereby generating an ejecting effect, which can eject the liquid refrigerant at the bottom of the header pipe through the ejector pipe and blow it into droplets to improve the liquid separation effect of the distribution pipe, and thus improve the heat exchange efficiency of the heat exchanger.

[0009] In one embodiment, a plurality of communication holes are further formed in the side wall of the distribution pipe, the communication holes are arranged opposite to the injection holes, one end of the ejector pipe is connected to the inner wall of the communication hole, and the other end extends into the injection hole. A jet channel is formed between the outer peripheral wall of the ejector pipe and the hole wall of the injection hole;

[0010] Alternatively, one end of the ejector pipe is connected to the inner wall of the communication hole, and the other end extends out of the injection hole. A jet channel is formed between the outer peripheral wall of the ejector pipe and the hole wall of the injection hole.

[0011] With such a setting, when the distribution pipe works, the refrigerant in the distribution pipe is a gas-liquid two-phase refrigerant. Due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant is directly ejected through the jet channel. At the same time, part of the liquid refrigerant is guided to be ejected from the jet channel. Due to the action of gravity, part of the liquid refrigerant will gather at the bottom of the manifold. Due to the entrainment effect caused by the relatively high flow rate of the gaseous refrigerant, the liquid refrigerant gathered at the bottom of the manifold will be ejected through the ejector pipe and can be blown and broken into droplets, so as to be evenly mixed and distributed, thereby improving the liquid separation effect of the distribution pipe and thus improving the heat exchange efficiency of the heat exchanger.

[0012] In one embodiment, the cross-sectional area of the injection hole is larger than the cross-sectional area of the communication hole.

[0013] With such a setting, it is convenient for the ejector pipe to pass through the injection hole and form a flow channel with the inner wall of the injection hole, so as to facilitate the ejection of the gaseous refrigerant, be able to generate an entrainment effect, and evenly mix and distribute the gaseous refrigerant and the liquid refrigerant, thereby improving the liquid separation effect of the distribution pipe and thus improving the heat exchange efficiency of the heat exchanger.

[0014] In one embodiment, along the circumferential direction of the injection hole, the hole wall of the injection hole protrudes towards the central axis direction of the injection hole to form an abutting portion, and the outer peripheral wall of the ejector pipe abuts against the abutting portion.

[0015] With such a setting, the abutting portion is arranged to abut against the outer wall of the ejector pipe to improve the stability of the ejector pipe, prevent the ejector pipe from vibrating due to the injection impact of the refrigerant, and thus improve the overall firmness of the refrigerant distribution structure.

[0016] In one embodiment, the end face of the abutting portion in contact with the ejector pipe is adapted to the outer peripheral wall of the ejector pipe.

[0017] With such a setting, it can better ensure the cooperation and abutment between the ejector pipe and the abutting portion, improve the stability of the ejector pipe, and thus improve the overall firmness of the refrigerant distribution structure.

[0018] In one embodiment, one such abutting portion protrudes from the hole wall of the injection hole towards the central axis direction of the injection hole.

[0019] Set it like this to improve the stability of the ejector tube, prevent the ejector tube from vibrating due to the jet impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure, and at the same time, it can save materials.

[0020] In one embodiment, along the length direction of the distribution pipe, two of the abutting portions protrude from the hole wall of the injection hole towards the central axis direction of the injection hole, and the two abutting portions are arranged oppositely.

[0021] Set it like this, arranging the two abutting portions oppositely can further improve the stability of the ejector tube, prevent the ejector tube from vibrating due to the jet impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure.

[0022] In one embodiment, along the direction perpendicular to the length direction of the distribution pipe, two of the abutting portions protrude from the hole wall of the injection hole towards the central axis direction of the injection hole, and the two abutting portions are arranged oppositely.

[0023] Set it like this, arranging the two abutting portions oppositely can further improve the stability of the ejector tube, prevent the ejector tube from vibrating due to the jet impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure.

[0024] This application also provides a heat exchanger, including a header pipe, a flat tube and the refrigerant distribution structure described above. The header pipe has a second chamber. One end of the flat tube is communicated with the second chamber. One end of the refrigerant distribution structure extends into the second chamber, and the other end is located outside the header pipe. Both ends of the ejector tube are communicated with the second chamber, and the injection channel is communicated with the second chamber.

[0025] Set it like this. When the distribution pipe works, the refrigerant in the distribution pipe is a gas-liquid two-phase refrigerant. Because the flow rate of the gaseous refrigerant is relatively high, the gaseous refrigerant directly jets out through the injection channel. At the same time, part of the liquid refrigerant jets out from the injection channel and partly gathers at the bottom of the second chamber. Due to the ejector effect generated by the relatively high flow rate of the gaseous refrigerant, the liquid refrigerant at the bottom of the second chamber will be ejected through the ejector tube and can break up into droplets, so as to be evenly mixed and distributed into the flat tube to improve the liquid separation effect of the distribution pipe, thereby improving the heat exchange efficiency of the heat exchanger.

[0026] In one embodiment, the distribution pipe is eccentrically arranged in the header pipe, and the distribution pipe is arranged away from the flat tube.

[0027] Set it like this. Since the volume of the gaseous refrigerant is larger than that of the liquid refrigerant, the distribution pipe is eccentrically arranged in the header pipe and arranged away from the flat tube, which can reduce the flow rate of the gaseous refrigerant, reduce the pressure loss, and thus avoid excessive reduction of the saturation temperature.

[0028] Compared with the prior art, a refrigerant distribution structure provided by the present application can eject liquid refrigerant through a plurality of ejector pipes in a timely and rapid manner, which is beneficial to the uniform distribution of the gas-liquid two-phase refrigerant, shortens the distribution time, improves the distribution efficiency, and thus improves the heat exchange efficiency. When the distribution pipe works, the refrigerant in the distribution pipe is a gas-liquid two-phase refrigerant. Due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant can directly eject through the ejection channel. The high-speed flowing gaseous refrigerant will form a negative pressure, thereby generating an ejection effect, which can eject the liquid refrigerant at the bottom of the header pipe through the ejector pipe and blow it into droplets to improve the liquid separation effect of the distribution pipe, and thus improve the heat exchange efficiency of the heat exchanger. Brief Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of a heat exchanger provided by the present invention.

[0030] Figure 2 It is a schematic cross-sectional view of a partial structure of a heat exchanger provided by the present invention.

[0031] Figure 3 It is a schematic cross-sectional view of a partial structure of a heat exchanger provided by the present invention.

[0032] Figure 4 It is a schematic diagram of a partial structure of an ejector pipe installed in a distribution pipe provided by the present invention.

[0033] Figure 5 It is a schematic diagram of a partial structure of an ejector pipe installed in a distribution pipe in Embodiment 1 provided by the present invention.

[0034] Figure 6 It is a schematic diagram of a partial structure of an ejector pipe installed in a distribution pipe in Embodiment 2 provided by the present invention.

[0035] Figure 7 is Figure 6 cross-sectional schematic diagram of.

[0036] Figure 8 It is a schematic diagram of a partial structure of an ejector pipe installed in a distribution pipe in Embodiment 3 provided by the present invention.

[0037] In the figure, 100, refrigerant distribution structure; 10, distribution pipe; 11, first chamber; 12, ejection hole; 13, ejection channel; 14, communication hole; 15, ejector pipe; 16, abutting portion; 20, heat exchanger; 21, header pipe; 211, second chamber; 2111, liquid film region; 2112, gas film region; 22, flat tube; 23, fin. Detailed Description of the Embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of the heat exchanger 20 provided by the present invention, Figure 2 and which is a schematic cross-sectional view of a partial structure of the heat exchanger 20 provided by the present invention. The present application provides a refrigerant distribution structure 100, which is installed in the header 21 of the heat exchanger 20 and is used to distribute the gas-liquid mixed refrigerant in a timely manner and ensure uniform mixing of the refrigerant, thereby improving the heat exchange efficiency of the heat exchanger 20.

[0042] The existing refrigerant distribution structure includes a distribution pipe, and a plurality of distribution holes are formed in the distribution pipe. After the gas-liquid two-phase refrigerant enters the distribution pipe, it is ejected from each distribution hole to enhance the heat exchange capacity of the heat exchanger. However, this refrigerant distribution structure has a poor effect in a heat exchanger with a large size, which will cause the heat exchange efficiency of the heat exchanger to decrease.

[0043] Please refer to Figure 3 and Figure 4 , Figure 3 which is a schematic cross-sectional view of a partial structure of the heat exchanger 20 provided by the present invention, Figure 4Schematic diagram of the partial structure of the ejector tube 15 provided by the present invention installed in the distribution tube 10. The refrigerant distribution structure 100 provided by the present application includes a distribution tube 10 and a plurality of ejector tubes 15. The distribution tube 10 has a first chamber 11. A plurality of injection holes 12 are formed in the side wall of the distribution tube 10. The plurality of ejector tubes 15 are installed in the first chamber 11 at intervals. One end of the ejector tube 15 penetrates through the inner wall of the first chamber 11 and communicates with the manifold 21, and the other end passes through the injection hole 12 to form an injection channel 13 with the injection hole 12. The injection channel 13 communicates with the first chamber 11 and the manifold 21 respectively.

[0044] Further, the manifold 21 has a second chamber 211. One end of the refrigerant distribution structure 100 extends into the second chamber 211, and the other end is located outside the manifold 21. Both ends of the ejector tube 15 communicate with the second chamber 211, and the injection channel 13 communicates with the second chamber 211.

[0045] When the distribution tube 10 is working, the refrigerant in the distribution tube 10 is a gas-liquid two-phase refrigerant. Due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant can be directly ejected through the injection hole 12. At the same time, part of the liquid refrigerant is ejected. Due to the action of gravity, part of the liquid refrigerant will collect at the bottom of the manifold 21.

[0046] The second chamber 211 includes a gas film region 2112 and a liquid film region 2111. It should be noted that in the present application, the region where the gaseous refrigerant is ejected into the manifold 21 through the injection hole 12 is called the gas film region 2112, that is, the region formed between the inner wall of the manifold 21 and the outer wall of the distribution tube 10 close to the following flat tube 22; the region where the liquid refrigerant collects at the bottom of the manifold 21 is called the liquid film region 2111, that is, the region formed between the inner wall of the manifold 21 and the outer wall of the distribution tube 10 far from the following flat tube 22. One end of the ejector tube 15 communicates with the liquid film region 2111, and the other end passes through the injection hole 12 to communicate with the gas film region 2112 and forms an injection channel 13 with the injection hole 12. The injection channel 13 communicates with the gas film region 2112.

[0047] By providing multiple ejector pipes 15 in this application, the liquid refrigerant can be ejected into the gas film area 2112 in a timely and rapid manner through the ejector pipes 15, which is conducive to the uniform distribution of the gas-liquid two-phase refrigerant, shortens the distribution time, improves the distribution efficiency, and thus improves the heat exchange efficiency. When the distribution pipe 10 is working, the refrigerant in the distribution pipe 10 is a gas-liquid two-phase refrigerant. Due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant can directly be ejected through the ejection holes 12 into the gas film area 2112. The high-speed flowing gaseous refrigerant will form a negative pressure, thereby generating an ejector effect, which can eject the liquid refrigerant at the bottom of the manifold 21, that is, the liquid refrigerant in the liquid film area 2111, through the ejector pipes 15 into the gas film area 2112, and blow it into droplets by breaking it, so as to form a misty mixed refrigerant, in order to improve the liquid separation effect of the distribution pipe 10, and thus improve the heat exchange efficiency of the heat exchanger 20.

[0048] Further, in one embodiment, a plurality of communication holes 14 are also formed in the side wall of the distribution pipe 10. The communication holes 14 are disposed opposite to the ejection holes 12. One end of the ejector pipe 15 is connected to the inner wall of the communication hole 14, and the other end extends into the ejection hole 12. A jet channel 13 is formed between the outer peripheral wall of the ejector pipe 15 and the hole wall of the ejection hole 12.

[0049] In another embodiment, one end of the ejector pipe 15 is connected to the inner wall of the communication hole 14, and the other end extends out of the ejection hole 12. A jet channel 13 is formed between the outer peripheral wall of the ejector pipe 15 and the hole wall of the ejection hole 12.

[0050] When the distribution pipe 10 is working, the refrigerant in the distribution pipe 10 is a gas-liquid two-phase refrigerant. Due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant is directly ejected through the jet channel 13. At the same time, part of the liquid refrigerant is ejected from the jet channel 13. Due to the action of gravity, part of the liquid refrigerant will gather in the liquid film area 2111. Due to the ejector effect generated by the relatively high flow rate of the gaseous refrigerant, the liquid refrigerant gathered in the liquid film area 2111 will be ejected through the ejector pipes 15 and can be blown into droplets by breaking it, so as to be uniformly mixed and distributed, in order to improve the liquid separation effect of the distribution pipe 10, and thus improve the heat exchange efficiency of the heat exchanger 20.

[0051] Specifically, the cross-sectional area of the ejection hole 12 is larger than the cross-sectional area of the communication hole 14; it is convenient for the ejector pipe 15 to pass through the ejection hole 12 and form a jet channel 13 with the inner wall of the ejection hole 12, so as to facilitate the ejection of the gaseous refrigerant, be able to generate an ejector effect, uniformly mix and distribute the gaseous refrigerant and the liquid refrigerant, in order to improve the liquid separation effect of the distribution pipe 10, and thus improve the heat exchange efficiency of the heat exchanger 20.

[0052] Please refer to Figures 5 - 8 , Figure 5 which is a schematic diagram of a partial structure of the ejector pipe 15 installed in the distribution pipe 10 in the first embodiment provided by the present invention;Figure 6 Schematic diagram of a partial structure of the ejector tube 15 installed in the distribution pipe 10 in the second embodiment provided by the present invention; Figure 7 For Figure 6 Cross-sectional schematic diagram; Figure 8 Schematic diagram of a partial structure of the ejector tube 15 installed in the distribution pipe 10 in the third embodiment provided by the present invention.

[0053] Along the circumferential direction of the injection hole 12, the hole wall of the injection hole 12 is convexly provided with an abutting portion 16 towards the central axis direction of the injection hole 12, and the outer peripheral wall of the ejector tube 15 abuts against the abutting portion 16. The abutting portion 16 is provided to abut against the outer wall of the ejector tube 15 to improve the stability of the ejector tube 15, prevent the ejector tube 15 from vibrating due to the injection impact of the refrigerant, and thus improve the overall firmness of the refrigerant distribution structure 100.

[0054] Preferably, the end face of the abutting portion 16 that abuts against the ejector tube 15 is adapted to the outer peripheral wall of the ejector tube 15. In this way, it can better ensure the cooperation and abutment between the ejector tube 15 and the abutting portion 16, improve the stability of the ejector tube 15, and thus improve the overall firmness of the refrigerant distribution structure 100.

[0055] Embodiment 1

[0056] Please refer to Figure 5 , the hole wall of the injection hole 12 is convexly provided with an abutting portion 16 towards the central axis direction of the injection hole 12. With such a setting, not only can the stability of the ejector tube 15 be improved, preventing the ejector tube 15 from vibrating due to the injection impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure 100, but also the flow rate of the injection hole 12 can be increased and materials can be saved.

[0057] In this embodiment, the abutting portion 16 can be arranged along the length direction of the distribution pipe 10 or along a direction perpendicular to the length direction of the distribution pipe 10. It should be noted that the length direction refers to the direction along the central axis of the distribution pipe 10 from the inlet end of the distribution pipe 10 to the other end of the distribution pipe 10, or the direction along the central axis of the distribution pipe 10 from one end of the distribution pipe 10 to the inlet end of the distribution pipe 10.

[0058] Embodiment 2

[0059] Please refer to Figure 6 and Figure 7 , Figure 6 Schematic diagram of a partial structure of the ejector tube 15 installed in the distribution pipe 10 in the second embodiment provided by the present invention; Figure 7 For Figure 6 Cross-sectional schematic diagram.

[0060] Along the length direction of the distribution pipe 10, two abutting portions 16 protrude from the hole wall of the injection hole 12 towards the central axis direction of the injection hole 12, and the two abutting portions 16 are arranged oppositely. In this way, by arranging the two abutting portions 16 oppositely, the stability of the ejector pipe 15 can be further improved, preventing the ejector pipe 15 from vibrating due to the injection impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure 100.

[0061] Embodiment III

[0062] Please refer to Figure 8 , Figure 8 which is a schematic diagram of a partial structure of the ejector pipe 15 installed in the distribution pipe 10 in Embodiment III provided by the present invention.

[0063] Along the direction perpendicular to the length of the distribution pipe 10, two abutting portions 16 protrude from the hole wall of the injection hole 12 towards the central axis direction of the injection hole 12, and the two abutting portions 16 are arranged oppositely. In this way, by arranging the two abutting portions 16 oppositely, the stability of the ejector pipe 15 can be further improved, preventing the ejector pipe 15 from vibrating due to the injection impact of the refrigerant, thereby improving the overall firmness of the refrigerant distribution structure 100.

[0064] The arrangement mode and quantity of the abutting portions 16 are not limited to the above three embodiments. The number of the abutting portions 16 can also be greater than two. When the number is an even number, they can also be arranged asymmetrically.

[0065] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic diagram of the structure of the heat exchanger 20 provided by the present invention, Figure 2 which is a schematic cross-sectional view of a partial structure of the heat exchanger 20 provided by the present invention. The present application also provides a heat exchanger 20, including a header pipe 21, flat tubes 22 and the above refrigerant distribution structure 100. The heat exchanger 20 is installed in a refrigeration system for heat exchange. It should be noted that refrigerant flows through the flat tubes 22. The heat exchanger 20 can be used as an evaporator or a condenser. The ends of the flat tubes 22 are communicated with the second chamber 211 of the header pipe 21.

[0066] Further, please refer to Figure 3 , Figure 3 which is a schematic cross-sectional view of a partial structure of the heat exchanger 20 provided by the present invention.

[0067] The distribution pipe 10 is eccentrically arranged in the header pipe 21, and the distribution pipe 10 is arranged away from the flat pipe 22; in this application, the liquid film area 2111 is arranged farther away from the flat pipe 22 relative to the gas film area 2112, that is to say, the volume of the liquid film area 2111 is smaller than the volume of the gas film area 2112. It can be understood that since the volume of the gaseous refrigerant is larger than the volume of the liquid refrigerant, setting the volume of the gas film area 2112 to be larger can reduce the flow rate of the gaseous refrigerant, reduce the pressure loss, thereby avoiding excessive reduction of the saturation temperature and improving the performance of the heat exchanger 20.

[0068] Preferably, the header pipe 21 is horizontally installed, and the liquid film area 2111 is at the bottom of the header pipe 21, so that the liquid refrigerant can be stored in the liquid film area 2111 due to the action of gravity.

[0069] During the operation of the heat exchanger 20, the refrigerant distributed by the refrigerant distribution structure 100 enters the flat pipe 22 from the gas film area 2112, and exchanges heat with the outside air through the fins 23 during the flow process.

[0070] In this application, a plurality of ejector pipes 15 are arranged in the distribution pipe 10, and a plurality of injection holes 12 are opened on the side wall of the distribution pipe 10. One end of the ejector pipe 15 is communicated with the liquid film area 2111, and the other end passes through the injection hole 12 and is communicated with the gas film area 2112 and forms an injection channel 13 with the injection hole 12. The injection channel 13 is respectively communicated with the first chamber 11 and the gas film area 2112. With such a setting, when the distribution pipe 10 works, due to the relatively high flow rate of the gaseous refrigerant, the gaseous refrigerant can be directly ejected through the injection hole 12 to the gas film area 2112. The high-speed flowing gaseous refrigerant will form a negative pressure, thereby generating an ejector effect, which can eject the liquid refrigerant in the liquid film area 2111 through the ejector pipe 15, blow it and break it into droplets, which is beneficial to the uniform distribution of the gas-liquid two-phase refrigerant, shorten the distribution time, improve the distribution efficiency, and thus improve the heat exchange efficiency.

[0071] In addition, it should be noted that using words such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning, so it cannot be understood as a limitation on the protection scope of the present invention.

[0072] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0073] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as appropriate changes and variations are made to the above embodiments within the spirit of the present invention, they fall within the scope of protection required by the present invention.

Claims

1. A refrigerant distribution structure, characterized in that, At least partially disposed within the header pipe, the refrigerant distribution structure includes a distribution pipe and a plurality of ejector pipes. The distribution pipe has a first chamber, and a plurality of injection holes are formed in the side wall of the distribution pipe. The plurality of ejector pipes are installed in the first chamber at intervals. One end of the ejector pipe penetrates through the inner wall of the first chamber and communicates with the header pipe. The other end of the ejector pipe passes through the injection hole and forms an injection channel with the injection hole. The injection channel communicates with the first chamber and the header pipe respectively.

2. The refrigerant distribution structure according to claim 1, characterized in that, A plurality of communication holes are further formed in the side wall of the distribution pipe. The communication holes are disposed opposite to the injection holes. One end of the ejector pipe is connected to the inner wall of the communication hole, and the other end extends into the injection hole. An injection channel is formed between the outer peripheral wall of the ejector pipe and the hole wall of the injection hole. Alternatively, one end of the ejector pipe is connected to the inner wall of the communication hole, and the other end extends out of the injection hole. An injection channel is formed between the outer peripheral wall of the ejector pipe and the hole wall of the injection hole.

3. The refrigerant distribution structure according to claim 2, characterized in that, The cross-sectional area of the injection hole is larger than the cross-sectional area of the communication hole.

4. The refrigerant distribution structure according to claim 1, characterized in that, Along the circumferential direction of the injection hole, the hole wall of the injection hole protrudes towards the central axis direction of the injection hole to form an abutting portion, and the outer peripheral wall of the ejector pipe abuts against the abutting portion.

5. The refrigerant distribution structure according to claim 4, characterized in that, The end face of the abutting portion that abuts against the ejector pipe is adapted to the outer peripheral wall of the ejector pipe.

6. The refrigerant distribution structure according to claim 4, characterized in that, One such abutting portion protrudes from the hole wall of the injection hole towards the central axis direction of the injection hole.

7. The refrigerant distribution structure according to claim 4, characterized in that, Along the length direction of the distribution pipe, two such abutting portions protrude from the hole wall of the injection hole towards the central axis direction of the injection hole, and the two abutting portions are disposed opposite to each other.

8. The refrigerant distribution structure according to claim 4, characterized in that, Along the circumferential direction of the distribution pipe, two such abutting portions protrude from the hole wall of the injection hole towards the central axis direction of the injection hole, and the two abutting portions are disposed opposite to each other.

9. A heat exchanger, characterized in that, It includes a header pipe, a flat pipe, and the refrigerant distribution structure according to any one of claims 1-8. The header pipe has a second chamber. One end of the flat pipe communicates with the second chamber. One end of the refrigerant distribution structure extends into the second chamber, and the other end is located outside the header pipe. Both ends of the ejector pipe communicate with the second chamber respectively, and the injection channel communicates with the second chamber.

10. The heat exchanger according to claim 9, characterized in that, The distribution pipe is eccentrically disposed within the header pipe and is disposed away from the flat pipe.

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