Liquid distributor and evaporator

Abstract

The liquid distributor comprises a first liquid distribution box, a second liquid distribution box, a cover plate and a gas blocking cover, and the width of the second liquid distribution box is smaller than that of the first liquid distribution box; the cover plate is installed at the top of the first liquid distribution box, a liquid distribution cavity is defined by the cover plate and the first liquid distribution box, a liquid supply hole and an exhaust port which are communicated with the liquid distribution cavity are formed in the cover plate, and the second liquid distribution box is arranged in the liquid distribution cavity and spaced from the first liquid distribution box; the gas blocking cover is located in the liquid distribution cavity and comprises a main plate and two gas blocking plates, the main plate is arranged between the cover plate and the second liquid distribution box, a through hole communicated with the liquid supply hole is formed in the main plate, and the two gas blocking plates are installed on the two sides of the main plate and located on the two sides of the second liquid distribution box. According to the liquid distributor, before the gaseous refrigerant is discharged, the liquid refrigerant carried in the liquid distributor can be blocked by the gas blocking cover, so that the gaseous refrigerant and the liquid refrigerant can be fully separated, the situation that a compressor sucks gas and carries liquid is avoided, and the service life of the compressor is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and more specifically, to a liquid distributor and an evaporator. Background Art

[0002] When a gravity-settling falling-film evaporator is in use, the flow rate of the gravity-settling holes mainly depends on the liquid level height of the refrigerant in the liquid distributor. However, when the refrigerant contains gaseous refrigerant, due to the non-uniformity of the gas, the liquid level height in the liquid distributor is not uniform, resulting in uneven liquid distribution. To solve this problem, in related technologies, an exhaust passage is usually provided inside the liquid distributor to separate and discharge the gaseous refrigerant. However, due to the limitation of the outer dimension of the distribution box, it is difficult to provide a large space for the exhaust passage, resulting in incomplete separation. The discharged gaseous refrigerant carries liquid refrigerant, causing liquid carry-over during compressor suction and affecting the service life of the compressor. Summary of the Invention

[0003] Embodiments of the present application provide a liquid distributor and an evaporator to solve at least one of the above-mentioned technical problems.

[0004] The liquid distributor according to the embodiments of the present application includes:

[0005] A first liquid distribution box and a second liquid distribution box, the width of the second liquid distribution box being smaller than that of the first liquid distribution box;

[0006] A cover plate, the cover plate being installed on the top of the first liquid distribution box and enclosing a liquid distribution cavity with the first liquid distribution box. A liquid supply hole and an exhaust port communicating with the liquid distribution cavity are provided on the cover plate. The second liquid distribution box is arranged in the liquid distribution cavity and is spaced from the first liquid distribution box;

[0007] An air baffle, the air baffle being located in the liquid distribution cavity. The air baffle includes a main board and two air baffle plates. The main board is arranged between the cover plate and the second liquid distribution box. A through hole communicating with the liquid supply hole is provided on the main board. The two air baffle plates are installed on both sides of the main board and are located on both sides of the second liquid distribution box.

[0008] For the liquid distributor provided by the present application, by arranging an air baffle between the cover plate and the second liquid distribution box, the liquid refrigerant carried inside the gaseous refrigerant will be blocked by the air baffle before the gaseous refrigerant is discharged from the exhaust port, so that the gaseous refrigerant and the liquid refrigerant can be fully separated, which is beneficial to avoiding liquid carry-over during compressor suction and ensuring the service life of the compressor.

[0009] In some embodiments, the liquid distributor further includes a filter screen, and the filter screen is installed inside the cover plate and covers the exhaust port.

[0010] In this way, the filter screen can further filter the liquid refrigerant carried in the gaseous refrigerant, avoiding liquid carryover during compressor suction.

[0011] In some embodiments, the liquid distributor further includes a third liquid distribution box, which is disposed in the liquid distribution cavity and located between the first liquid distribution box and the second liquid distribution box, and the third liquid distribution box is spaced apart from both the first liquid distribution box and the second liquid distribution box.

[0012] In this way, arranging the third liquid distribution box can further improve the uniformity of liquid distribution.

[0013] In some embodiments, the projections of the two baffle plates in the direction perpendicular to the plane of the third liquid distribution box are located within the third liquid distribution box.

[0014] In this way, it can be avoided that the liquid refrigerant dripping along the baffle plates directly impacts the first liquid distribution box, causing changes in the liquid level height, thereby affecting the uniformity of liquid distribution.

[0015] In some embodiments, the bottom of the first liquid distribution box is provided with first liquid distribution holes, and the bottom of the third liquid distribution box is provided with third liquid distribution holes, and the diameter of the third liquid distribution holes is larger than that of the first liquid distribution holes.

[0016] In this way, the larger-diameter third liquid distribution holes achieve rough distribution of the liquid, which can reduce the inlet flow fluctuation, and the smaller-diameter first liquid distribution holes further refine the liquid droplets or liquid film, which is beneficial to enhancing the overall distribution uniformity.

[0017] In some embodiments, rib plates are provided on the bottom surface of the first liquid distribution box, and the rib plates are arranged along the width direction of the first liquid distribution box.

[0018] In this way, the rib plates can prevent the liquid refrigerant on the bottom surface of the first liquid distribution box from generating turbulent flow, thereby affecting the uniformity of the liquid level height.

[0019] In some embodiments, the second liquid distribution box includes a second bottom wall and a second peripheral wall surrounding the second bottom wall, and the second liquid distribution holes are provided on the second peripheral wall.

[0020] In this way, the liquid refrigerant can be initially dispersed and flow outward, so that the distribution of the liquid refrigerant is more uniform.

[0021] In some embodiments, the liquid supply holes and the exhaust ports are spaced apart.

[0022] In this way, it can be avoided that the liquid supply holes and the exhaust ports are too close, and when the gaseous refrigerant is discharged from the exhaust ports, the liquid refrigerant will be carried out from the liquid supply holes.

[0023] The evaporator according to another embodiment of the present application includes the liquid distributor described in any one of the above.

[0024] In some embodiments, the evaporator further includes a housing, heat exchange tubes, and a plurality of partition plates. The liquid distributor and the heat exchange tubes are disposed within the housing, the heat exchange tubes are disposed below the liquid distributor, the plurality of partition plates are all perpendicular to the length direction of the housing, and the plurality of partition plates are spaced apart along the length direction of the housing.

[0025] In this way, the heat exchange tubes are evenly divided into several regions along the length of the housing, which can prevent the flow of gaseous refrigerant from disturbing the uniformity of the liquid refrigerant in other regions.

[0026] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a schematic structural diagram of the liquid distributor according to an embodiment of the present application;

[0029] Figure 2 is a partial structural diagram of the liquid distributor according to an embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of the evaporator according to an embodiment of the present application;

[0031] Figure 4 is a cross-sectional view of the evaporator according to an embodiment of the present application.

[0032] Main element symbols: Evaporator 100, Liquid distributor 10, First liquid distribution box 11, First bottom wall 111, First peripheral wall 112, First liquid distribution hole 113, Rib plate 114, Second liquid distribution box 12, Second bottom wall 121, Second peripheral wall 122, Second liquid distribution hole 123, Cover plate 13, Liquid supply hole 131, Exhaust port 132, Gas baffle 14, Main board 141, Gas baffle plate 142, Through hole 143, Filter screen 15, Third liquid distribution box 16, Third liquid distribution hole 161, Housing 20, Main housing 21, End cover 22, Suction port 23, Heat exchange tubes 30, Partition plate 40, Tube sheet 50, Gas equalizing plate 60. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0036] The disclosure herein provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0037] When a gravity-settling falling-film evaporator is in use, the flow rate of the gravity-settling holes mainly depends on the liquid level height of the refrigerant in the liquid distributor. However, when the refrigerant contains gaseous refrigerant, due to the non-uniformity of the gas, the liquid level height in the liquid distributor is not uniform, resulting in uneven liquid distribution. To solve this problem, in the related art, an exhaust passage is usually provided inside the liquid distributor to separate and discharge the gaseous refrigerant. However, due to the limitation of the outer dimension of the distribution box, it is difficult to provide a large space for the exhaust passage, resulting in incomplete separation. The discharged gaseous refrigerant carries liquid refrigerant, causing liquid carry-over during compressor suction and affecting the service life of the compressor.

[0038] Please refer to Figure 1 , an embodiment of the present application provides an evaporator 100. The evaporator 100 includes a liquid distributor 10. The liquid distributor 10 includes a first liquid distribution box 11, a second liquid distribution box 12, a cover plate 13, and a gas baffle 14. The width of the second liquid distribution box 12 is smaller than that of the first liquid distribution box 11. The cover plate 13 is installed on the top of the first liquid distribution box 11 and encloses a liquid distribution cavity with the first liquid distribution box 11. A liquid supply hole 131 and an exhaust port 132 communicating with the liquid distribution cavity are formed on the cover plate 13. The second liquid distribution box 12 is disposed in the liquid distribution cavity and is spaced from the first liquid distribution box 11. The gas baffle 14 is located in the liquid distribution cavity. The gas baffle 14 includes a main board 141 and two gas baffle plates 142. The main board 141 is disposed between the cover plate 13 and the second liquid distribution box 12. A through hole 143 communicating with the liquid supply hole 131 is formed on the main board 141. The two gas baffle plates 142 are installed on both sides of the main board 141 and are located on both sides of the second liquid distribution box 12.

[0039] For the liquid distributor 10 provided in the present application, by providing a gas baffle 14 between the cover plate 13 and the second liquid distribution box 12, the liquid refrigerant carried inside the gaseous refrigerant will be blocked by the gas baffle 14 before the gaseous refrigerant is discharged from the exhaust port 132, so that the gaseous refrigerant and the liquid refrigerant can be fully separated, which is beneficial to avoiding liquid carry-over during compressor suction and ensuring the service life of the compressor.

[0040] Specifically, please refer to Figure 1 and Figure 2, The evaporator 100 is one of the key components in the refrigeration cycle of a refrigeration device. Its main function is to absorb heat and vaporize (evaporate) the liquid refrigerant, thereby taking away the heat of the surrounding environment to achieve the purpose of refrigeration or cooling.

[0041] Furthermore, in the evaporator 100 of the refrigeration device, the liquid distributor 10 is a key auxiliary component, mainly used to ensure that the liquid refrigerant is evenly distributed to each heat exchange channel (such as pipes, fins, or plates, etc.) of the evaporator 100, avoiding problems such as a decrease in heat transfer efficiency or local icing caused by uneven liquid distribution.

[0042] In the embodiment of the present application, the first liquid distribution box 11 includes a first bottom wall 111 and a first peripheral wall 112 disposed around the first bottom wall 111. The first peripheral wall 112 is perpendicular to the first bottom wall 111, and the first peripheral wall 112 and the first bottom wall 111 enclose a trough-shaped structure. The first bottom wall 111 is horizontally arranged to prevent the refrigerant from flowing to the same side and accumulating, resulting in uneven refrigerant liquid level height.

[0043] Optionally, the shape of the first bottom wall 111 can be circular, elliptical, rectangular, polygonal, etc. In the embodiment of the present application, the shape of the first bottom wall 111 is rectangular, and the first liquid distribution box 11 is in the shape of a rectangular trough. In other embodiments, the first liquid distribution box 11 can also be selected in other shapes, and the specific shape can be selected according to actual needs, which will not be elaborated here.

[0044] In the embodiment of the present application, the second liquid distribution box 12 includes a second bottom wall 121 and a second peripheral wall 122 disposed around the second bottom wall 121. The second peripheral wall 122 is perpendicular to the second bottom wall 121, and the second peripheral wall 122 and the second bottom wall 121 enclose a trough-shaped structure. The second bottom wall 121 is horizontally arranged to prevent the refrigerant from flowing to the same side and accumulating, resulting in uneven refrigerant liquid level height.

[0045] Optionally, the shape of the second bottom wall 121 can be circular, elliptical, rectangular, polygonal, etc. In the embodiment of the present application, the shape of the second bottom wall 121 is rectangular, and the second liquid distribution box 12 is in the shape of a rectangular trough. In other embodiments, the second liquid distribution box 12 can also be selected in other shapes, and the specific shape can be selected according to actual needs, which will not be elaborated here.

[0046] Furthermore, the lengths of the first liquid distribution box 11 and the second liquid distribution box 12 are basically equal, the width of the second liquid distribution box 12 is smaller than that of the first liquid distribution box 11, and when the second liquid distribution box 12 is installed in the liquid distribution cavity, the axes of the first liquid distribution box 11 and the second liquid distribution box 12 are aligned.

[0047] In the embodiment of the present application, the cover plate 13 includes a top plate and two side plates of the same size. The two side plates are connected to both sides of the top plate. The width of the side plates is much smaller than the width of the top plate. The side plates are perpendicular to the top plate, and a chamfer is formed at the connection between the side plates and the top plate.

[0048] Further, both the liquid supply hole 131 and the exhaust port 132 are provided on the top plate. Specifically, the liquid supply hole 131 is provided on the axis in the length direction of the top plate. A liquid supply pipe is also installed on the top plate, and the liquid supply pipe is communicated with the liquid supply hole 131. The number of exhaust ports 132 is multiple, and the multiple exhaust ports 132 are respectively provided at the edges near the chamfer on both sides of the top plate. The exhaust ports 132 on the same side are arranged at intervals. The flow rate of the exhaust port 132 is controlled at 0.5 - 2 m / s. Optionally, the exhaust port 132 can be in a circular, rectangular or other structures.

[0049] In the embodiment of the present application, the cover plate 13 is an integrally formed one-piece structure. For example, the cover plate 13 can be formed by bending a whole metal plate. Further, the liquid distributor 10 further includes end walls at both ends. The end walls are attached to both ends of the first liquid distribution box 11 and the second liquid distribution box 12. The cover plate 13, the end walls and the first liquid distribution box 11 enclose a liquid distribution cavity.

[0050] In the embodiment of the present application, the gas baffle 14 includes a main board 141 and two gas baffle plates 142. The main board 141 and the two gas baffle plates 142 are connected in a U shape. The main board 141 is flat. The width of the main board 141 is slightly larger than the width of the second liquid distribution box 12. The bottom of the main board 141 can be flat, serrated, grooved or other shapes that are beneficial to liquid dripping. A through hole 143 communicated with the liquid supply hole 131 is opened on the main board 141. The through hole 143 is located directly below the liquid supply hole 131 and is communicated with the liquid supply hole 131.

[0051] Further, the gas baffle 14 is an integrally formed one-piece structure. For example, the gas baffle 14 can be formed by bending a whole metal plate.

[0052] Further, the gas baffle 14 is attached to the inner side of the top plate of the cover plate 13. To avoid the gas baffle 14 blocking the exhaust port 132, the width of the gas baffle 14 should be less than or equal to the width of the top plate. In the embodiment of the present application, the width of the gas baffle 14 should be equal to the width of the top plate.

[0053] Please refer to Figure 1 , in some embodiments, the liquid distributor 10 further includes a filter net 15. The filter net 15 is installed on the inner side of the cover plate 13 and covers the exhaust port 132.

[0054] In this way, the filter net 15 can further filter the liquid refrigerant carried in the gaseous refrigerant to avoid liquid carry - over during compressor suction.

[0055] Specifically, in the embodiments of the present application, the filter net 15 is in a long strip shape and is attached to the top of the cover plate 13 and located on both sides of the air baffle 14. The height of the air baffle 14 in the vertical direction is greater than the height of the second liquid distribution box 12 and the height of the filter net 15 by 10-100 mm; the width of the filter net 15 is greater than the width of the exhaust port 132, so as to better block the exhaust port 132 and avoid liquid refrigerant leaking from the exhaust port 132 due to incomplete blocking, resulting in liquid carrying in the compressor suction. Further, in the embodiments of the present application, the thickness of the filter net 15 is 20-100 mm, and the flow rate of the filter net 15 is controlled at 0.5-2 m / s.

[0056] Further, the filter net 15 is formed by stacking multiple grid-like structures. The sizes of the grids of each layer are different, and the grids of each layer are staggered. This is beneficial to better intercept the liquid refrigerant.

[0057] In the embodiments of the present application, the multiple grid-like structures are all made of metal materials or other materials with good heat conduction performance, so as to better gather the small liquid droplets formed by the liquid refrigerant.

[0058] Please refer to Figure 1 and Figure 2 , in some embodiments, the liquid distributor 10 further includes a third liquid distribution box 16. The third liquid distribution box 16 is arranged in the liquid distribution cavity and located between the first liquid distribution box 11 and the second liquid distribution box 12. The third liquid distribution box 16 is spaced from both the first liquid distribution box 11 and the second liquid distribution box 12.

[0059] In this way, setting the third liquid distribution box 16 can further improve the uniformity of liquid distribution.

[0060] Specifically, in the embodiments of the present application, the third liquid distribution box 16 is arranged between the first liquid distribution box 11 and the second liquid distribution box 12. The third liquid distribution box 16 is spaced from the first liquid distribution box 11, and the third liquid distribution box 16 is spaced from the second liquid distribution box 12. The third liquid distribution box 16 is in a rectangular plate-like structure, and the length of the third liquid distribution box 16 is equal to the lengths of the first liquid distribution box 11 and the second liquid distribution box 12.

[0061] In some embodiments, the second liquid distribution box 12 is a plate-like or box-like structure with dense openings, or is composed of multiple layers of plates or ribbons with dense openings.

[0062] In other embodiments, the third liquid distribution box 16 includes a third bottom wall and a third peripheral wall surrounding the bottom plate. The third peripheral wall is perpendicular to the third bottom wall. The third peripheral wall and the third bottom wall enclose a trough-like structure. The third bottom wall is horizontally arranged to prevent the refrigerant from flowing to the same side and forming a pile, resulting in uneven liquid level height of the refrigerant.

[0063] Optionally, the shape of the third bottom wall can be circular, oval, rectangular, polygonal, etc. In the embodiment of the present application, the shape of the third bottom wall is rectangular, and the third liquid distribution box 16 is in the shape of a rectangular groove. In other embodiments, the third liquid distribution box 16 can also be selected in other shapes, and the specific shape can be selected according to actual needs, which will not be elaborated here.

[0064] In some embodiments, the projections of the two gas baffle plates 142 in the direction perpendicular to the plane where the third liquid distribution box 16 is located are located inside the third liquid distribution box 16.

[0065] In this way, the liquid refrigerant dripping along the gas baffle plate 142 can be prevented from directly impacting the first liquid distribution box 11, causing a change in the liquid level height, thereby affecting the uniformity of liquid distribution.

[0066] Specifically, the width of the third liquid distribution box 16 is greater than the width of the second liquid distribution box 12 and less than or equal to the width of the first liquid distribution box 11. The projections of the two gas baffle plates 142 in the direction perpendicular to the plane where the third liquid distribution box 16 is located are located inside the third liquid distribution box 16. The through-road network is arranged on both sides of the gas baffle cover 14, and the projection of the filter screen 15 in the direction perpendicular to the third liquid distribution box 16 is also located inside the third liquid distribution box 16.

[0067] Furthermore, the filter screen 15 is arranged at an interval from the third liquid distribution box 16, and the distance between the filter screen 15 and the third liquid distribution box 16 is 50 - 500 mm. It is used for the sedimentation separation of large liquid droplets of the refrigerant gas-liquid mixture under the action of gravity. For small liquids that are difficult to separate, under the guiding action of the gaseous refrigerant, they converge in the filter screen and form large liquids and then fall off and separate.

[0068] Please refer to Figure 2 , in some embodiments, the first liquid distribution box 11 is provided with a first liquid distribution hole 113 at the bottom, and the third liquid distribution box 16 is provided with a third liquid distribution hole 161 at the bottom. The diameter of the third liquid distribution hole 161 is larger than that of the first liquid distribution hole 113.

[0069] In this way, the larger-diameter third liquid distribution hole 161 realizes the rough distribution of the liquid, which can reduce the inlet flow fluctuation. The smaller-diameter first liquid distribution hole 113 further refines the liquid droplets or liquid film, which is beneficial to enhancing the uniformity of the overall distribution.

[0070] Specifically, the shapes of the first liquid distribution hole 113 and the third liquid distribution hole 161 can be structures such as circular, square, trapezoidal, etc. The first liquid distribution hole 113 is arranged on the first bottom plate. The number of the first liquid distribution holes 113 is multiple, and the multiple first liquid distribution holes 113 are arranged in an array on the first bottom plate. The spacing of the first liquid distribution holes 113 in the width direction of the liquid distributor 10 is set according to the spacing of the lower heat exchange tubes 30; the longitudinal spacing is 10 - 50 mm. Similarly, the third liquid distribution box 16 is provided with a third liquid distribution hole 161 at the bottom. The number of the third liquid distribution holes 161 is multiple, and the multiple third liquid distribution holes 161 are arranged in an array on the first bottom plate.

[0071] Further, the diameter of the third liquid distribution hole 161 is larger than that of the first liquid distribution hole 113, and the projection of the first liquid distribution hole 113 along the direction perpendicular to the third liquid distribution box 16 intersects with the third liquid distribution hole 161. In this way, the liquid refrigerant dripping from the third liquid distribution hole 161 will not directly drip into the first liquid distribution hole 113 and flow out, thus avoiding the unevenness of the dripping of the liquid refrigerant.

[0072] In addition, the third liquid distribution hole 161 with a large aperture can effectively intercept larger particles or impurities in the refrigerant, reduce the possibility of blockage of the first liquid distribution hole 113 with a small aperture in the lower layer, and improve the stability of the system operation.

[0073] In some embodiments, a rib plate 114 is provided on the bottom surface of the first liquid distribution box 11, and the rib plate 114 is arranged along the width direction of the first liquid distribution box 11.

[0074] In this way, the rib plate 114 can prevent the liquid refrigerant on the bottom surface of the first liquid distribution box 11 from having a turbulent flow, thereby affecting the uniformity of the liquid level height.

[0075] Specifically, in the embodiments of the present application, the rib plate 114 is a reinforcing rib provided on the bottom surface of the first liquid distribution box 11, and nearly half of its height is less than or equal to the height of the peripheral wall of the first liquid distribution box 11. Further, the number of the rib plates 114 is multiple, and the multiple rib plates 114 are all arranged along the width direction of the first liquid distribution box 11, and the multiple first liquid distribution plates are evenly spaced.

[0076] Further, the rib plate 114 and the first liquid distribution box 11 are of an integral structure formed by integral processing.

[0077] In some embodiments, the second liquid distribution box 12 includes a second bottom wall 121 and a second peripheral wall 122 surrounding the second bottom wall 121, and the second liquid distribution hole 123 is provided on the second peripheral wall 122.

[0078] In this way, the liquid refrigerant can be preliminarily dispersed and flow to the outside, so that the distribution of the liquid refrigerant is more uniform.

[0079] Specifically, in the embodiments of the present application, the second liquid distribution hole 123 is opened on the peripheral walls on both sides or around the second liquid distribution box 12. Optionally, the shape of the second liquid distribution hole 123 can be circular, square, trapezoidal and other structures. The second liquid distribution hole 123 is adjusted according to the position of the liquid inlet pipe, so as to realize the first distribution of the refrigerant gas-liquid mixture, and the flow rate of the refrigerant at the second liquid distribution hole 123 is controlled at 0.5-5 m / s.

[0080] Please refer to Figure 1 , in some embodiments, the liquid supply hole 131 and the exhaust port 132 are arranged at intervals.

[0081] In this way, it is possible to avoid the liquid supply hole 131 and the exhaust port 132 being too close to each other, so that when the gaseous refrigerant is discharged from the exhaust port 132, the liquid refrigerant will be carried out from the liquid supply hole 131.

[0082] Specifically, in the embodiment of the present application, the liquid supply hole 131 is provided at one end of the cover plate 13, and the exhaust port 132 is provided at the other end of the cover plate 13.

[0083] In other embodiments, the liquid supply hole 131 may be provided in the middle of the cover plate 13, and at this time, the exhaust ports 132 should be provided at both ends of the cover plate 13.

[0084] Please refer to Figure 3 and Figure 4 , in some embodiments, the evaporator 100 further includes a housing 20, heat exchange tubes 30, and a plurality of partition plates 40. The liquid distributor 10 and the heat exchange tubes 30 are arranged inside the housing 20, the heat exchange tubes 30 are arranged below the liquid distributor 10, the plurality of partition plates 40 are all perpendicular to the length direction of the housing 20, and the plurality of partition plates 40 are arranged at intervals along the length direction of the housing 20.

[0085] In this way, the heat exchange tubes 30 are evenly divided into several regions along the length of the housing 20, which can avoid the flow of the gaseous refrigerant disturbing the uniformity of the liquid refrigerant in other regions.

[0086] Specifically, in the embodiment of the present application, the housing 20 includes a main housing 21 and end covers 22 arranged at both ends of the main housing 21. A tube sheet 50 is arranged inside the housing 20, and the number of tube sheets 50 is two. The two tube sheets 50 are respectively arranged inside the two end covers 22. The heat exchange tubes 30 are installed between the two tube sheets 50 and are suspended inside the housing 20 through the tube sheets 50. The liquid distributor 10 is arranged on top of the heat exchange tubes 30, and the liquid supply pipe penetrates through the housing 20 and extends to the outside of the housing 20.

[0087] An air suction port 23 is also opened at the top of the housing 20. It should be noted that the position of the air suction port 23 should be adjusted according to the position of the exhaust port 132, so as to avoid too high local flow rate at the exhaust port 132, resulting in liquid carry-over during compressor suction.

[0088] Furthermore, the evaporator 100 further includes partition plates 40. The number of partition plates 40 is multiple. The partition plates 40 are arranged along the direction perpendicular to the length direction of the housing 20. The heat exchange tubes 30 penetrate through the partition plates 40, and the multiple partition plates 40 are evenly arranged at intervals between the two tube sheets 50.

[0089] In the embodiment of the present application, the evaporator 100 further includes an air equalizing plate 60. The air equalizing plate 60 is arranged inside the housing 20 and covers the air suction port 23, and the air equalizing plate 60 is arranged between the liquid distributor 10 and the housing 20.

[0090] The gas equalizing plate 60 is evenly provided with a plurality of air holes, which are used to make the gas inhaled by the compressor more uniform. At the same time, it can also filter again before the gaseous refrigerant enters the compressor, so as to further remove the liquid refrigerant carried in the gaseous refrigerant.

[0091] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0092] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, unless otherwise specifically and clearly defined.

[0093] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A liquid distributor, characterized in that, Comprising: A first liquid distribution box and a second liquid distribution box, the width of the second liquid distribution box being smaller than that of the first liquid distribution box; A cover plate, the cover plate being installed on the top of the first liquid distribution box and enclosing a liquid distribution cavity with the first liquid distribution box. A liquid supply hole and an exhaust port communicating with the liquid distribution cavity are provided on the cover plate. The second liquid distribution box is arranged in the liquid distribution cavity and is spaced from the first liquid distribution box; An air baffle, the air baffle being located in the liquid distribution cavity. The air baffle includes a main board and two air baffle plates. The main board is arranged between the cover plate and the second liquid distribution box. A through hole communicating with the liquid supply hole is provided on the main board. The two air baffle plates are installed on both sides of the main board and are located on both sides of the second liquid distribution box.

2. The liquid distributor according to claim 1, characterized in that, The liquid distributor further includes a filter screen, and the filter screen is installed on the inner side of the cover plate and covers the exhaust port.

3. The liquid distributor according to claim 1, wherein The liquid distributor further includes a third liquid distribution box, the third liquid distribution box is arranged in the liquid distribution cavity and is located between the first liquid distribution box and the second liquid distribution box. The third liquid distribution box is spaced from both the first liquid distribution box and the second liquid distribution box.

4. The liquid distributor according to claim 3, characterized in that The projection of the two air baffle plates in the direction perpendicular to the plane where the third liquid distribution box is located is within the third liquid distribution box.

5. The liquid distributor according to claim 3, wherein The bottom of the first liquid distribution box is provided with a first liquid distribution hole, the bottom of the third liquid distribution box is provided with a third liquid distribution hole, and the diameter of the third liquid distribution hole is larger than that of the first liquid distribution hole.

6. The liquid distributor according to claim 1, characterized in that, Reinforcing plates are provided on the bottom surface of the first liquid distribution box, and the reinforcing plates are arranged along the width direction of the first liquid distribution box.

7. The liquid distributor according to claim 1, wherein, The second liquid distribution box includes a second bottom wall and a second peripheral wall surrounding the second bottom wall, and the second liquid distribution hole is provided on the second peripheral wall.

8. The liquid distributor according to claim 1, characterized in that, The liquid supply hole and the exhaust port are spaced apart.

9. An evaporator, characterized in that, Comprising the liquid distributor according to any one of claims 1-8.

10. The evaporator according to claim 9, characterized in that, The evaporator further includes a housing, heat exchange tubes and a plurality of partition plates. The liquid distributor and the heat exchange tubes are arranged in the housing. The heat exchange tubes are arranged below the liquid distributor. The plurality of partition plates are all perpendicular to the length direction of the housing, and the plurality of partition plates are spaced apart along the length direction of the housing.

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