Liquid distributor, evaporator and refrigeration plant

Abstract

This application discloses a liquid distributor, an evaporator, and a refrigeration device. The liquid distributor includes a cover plate, a main liquid distribution box, and a multi-stage liquid distribution box. The cover plate is installed on top of the main liquid distribution box and encloses it to form a liquid distribution cavity. The cover plate has a liquid supply hole and an exhaust port communicating with the liquid distribution cavity. The width of the multi-stage liquid distribution box is smaller than that of the main liquid distribution box. The multi-stage liquid distribution box is disposed within the liquid distribution cavity and spaced apart from the main liquid distribution box. The multi-stage liquid distribution box communicates with the liquid supply hole. The main liquid distribution box includes a main box body and an overflow pipe. The overflow pipe is vertically installed at the bottom of the main box body and connects the outside of the liquid distributor to the liquid distribution cavity. The liquid distributor, evaporator, and refrigeration device provided in this application perform preliminary distribution of refrigerant by setting up a multi-stage liquid distribution box communicating with the liquid supply hole, and achieve adaptive control of the liquid level in the liquid distribution cavity by using the vertically installed overflow pipe at the bottom of the main liquid distribution box. This helps to avoid the risk of a sudden increase in flow rate and liquid carryover caused by excessively high liquid level.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and more specifically, to a liquid distributor, an evaporator, and a refrigeration device. Background Technology

[0002] In falling film evaporation technology, gravity settling distribution relies on the liquid level to drive the refrigerant to evenly cover the heat exchange tubes. However, in related technologies, the distribution effect of gravity settling distribution is limited by the liquid level in the distributor. When the evaporator is under high load, the flow rate in the distributor will increase sharply due to the excessively high internal liquid level. The rapidly falling liquid will carry vapor into the suction port, causing a risk of liquid carryover. Summary of the Invention

[0003] This application provides a liquid distributor, an evaporator, and a refrigeration device to solve at least one of the aforementioned technical problems.

[0004] The liquid distributor according to this application includes a cover plate, a main liquid distribution box, and a multi-stage liquid distribution box. The cover plate is installed on the top of the main liquid distribution box and surrounds the main liquid distribution box to form a liquid distribution cavity. The cover plate has a liquid supply hole and an exhaust port communicating with the liquid distribution cavity. The width of the multi-stage liquid distribution box is smaller than that of the main liquid distribution box. The multi-stage liquid distribution box is disposed in the liquid distribution cavity and spaced apart from the main liquid distribution box. The multi-stage liquid distribution box is communicating with the liquid supply hole. The main liquid distribution box includes a main box body and an overflow pipe. The overflow pipe is vertically installed at the bottom of the main box body and communicates with the outside of the liquid distributor and the liquid distribution cavity.

[0005] The liquid distributor provided in this application performs preliminary distribution of refrigerant by setting up a multi-stage liquid distribution box connected to the liquid supply hole, and allows the pre-distributed refrigerant to enter the liquid distribution cavity formed by the cover plate and the main liquid distribution box. By using the overflow pipe installed vertically at the bottom of the main liquid distribution box, the liquid level in the liquid distribution cavity is adaptively controlled, which helps to avoid the risk of a surge in flow rate and liquid carryover caused by excessive liquid level.

[0006] In some embodiments, the main box body is provided with a main liquid trough, and the main liquid trough further includes a rib plate. The rib plate is disposed on the bottom surface of the main liquid trough along the width direction of the main liquid trough, and a through hole is provided on the rib plate.

[0007] Thus, by setting ribs along the width direction on the bottom surface of the main liquid distribution tank of the main box and opening connecting holes on the ribs, it is beneficial to enhance the structural strength of the main liquid distribution box. At the same time, the liquid in each area of ​​the main liquid distribution tank can be connected through the connecting holes, promoting uniform liquid distribution and further improving the liquid distribution effect.

[0008] In some embodiments, the multi-stage liquid distribution box includes a first liquid distribution box and a second liquid distribution box spaced apart in a vertical direction. The first liquid distribution box is in communication with the liquid supply hole and is located above the second liquid distribution box. The width of the first liquid distribution box is smaller than that of the second liquid distribution box.

[0009] In this way, by setting up two liquid distribution boxes of different widths, and connecting the first liquid distribution box with the liquid supply hole, the refrigerant first enters the smaller first liquid distribution box for initial distribution, and then flows into the larger second liquid distribution box for further distribution, thus achieving multi-stage uniform liquid distribution, which is beneficial to improving the distribution accuracy and stability of the liquid distributor.

[0010] In some embodiments, the liquid distributor further includes an air baffle, which includes a main board and two air baffles. The main board is disposed between the cover plate and the first liquid distribution box. The main board has a through hole communicating with the liquid supply hole. The two air baffles are installed on both sides of the main board and are located on both sides of the second liquid distribution box.

[0011] Thus, by setting a baffle between the cover plate and the first liquid distribution box, the liquid refrigerant carried inside the gaseous refrigerant will be blocked by the baffle before the gaseous refrigerant is discharged from the exhaust port, thereby allowing the gaseous and liquid refrigerants to be fully separated, which helps to prevent liquid from being carried in by the compressor during intake.

[0012] In some embodiments, one end of the air baffle is connected to the main board, and the other end is inclined toward the bottom of the main liquid distribution box. The projections of the two air baffles along the direction perpendicular to the plane where the second liquid distribution box is located are located inside the second liquid distribution box.

[0013] In this way, by setting up a baffle plate that slopes downwards, the intercepted droplets can flow smoothly back to the second liquid distribution box by gravity along the inclined surface, avoiding the droplets from accumulating on the baffle plate and being carried away by the airflow again, which helps to improve the separation efficiency and realize the rapid recovery of condensate.

[0014] In some embodiments, the first liquid distribution box includes a first bottom wall and a first peripheral wall surrounding the first bottom wall, and the first peripheral wall has a first liquid distribution hole.

[0015] In this way, the liquid refrigerant can be initially dispersed and flowed to the outside, thereby making the distribution of the liquid refrigerant more uniform.

[0016] In some embodiments, the bottom of the second liquid distribution box is provided with a second liquid distribution hole, and the bottom of the main liquid distribution box is provided with a third liquid distribution hole, wherein the diameter of the second liquid distribution hole is larger than that of the third liquid distribution hole.

[0017] In this way, the larger diameter second liquid distribution hole achieves coarse liquid distribution, which can reduce inlet flow fluctuations, while the smaller diameter third liquid distribution hole further refines the droplets or liquid film, which is beneficial to enhancing the uniformity of the overall distribution.

[0018] In some embodiments, the liquid distributor further includes a fixing frame and a filter screen, the filter screen being fixed to the cover plate by the fixing frame and covering the exhaust port.

[0019] In this way, the filter can further filter the liquid refrigerant carried in the gaseous refrigerant, preventing the compressor from drawing in liquid.

[0020] Another embodiment of the evaporator in this application includes the liquid distributor described in any of the above claims.

[0021] In some embodiments, the evaporator further includes a shell, heat exchange tubes, and a plurality of partition plates. The liquid distributor and the heat exchange tubes are disposed inside the shell, with the heat exchange tubes disposed below the liquid distributor. The plurality of partition plates are all perpendicular to the length direction of the shell and are spaced apart along the length direction of the shell.

[0022] In this way, dividing the heat exchange tubes into several regions along the length of the shell can prevent the flow of gaseous refrigerant from interfering with the uniformity of liquid refrigerant in other regions.

[0023] Another embodiment of the refrigeration device of this application includes the evaporator described in any one of the claims.

[0024] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the liquid distributor according to an embodiment of this application; Figure 2 This is a schematic diagram of the main liquid distribution box according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the multi-stage liquid distribution box according to an embodiment of this application; Figure 4 This is a partial structural schematic diagram of the liquid distributor according to an embodiment of this application; Figure 5This is a schematic diagram of the cover plate according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the evaporator according to an embodiment of this application; Figure 7 This is a schematic diagram of the evaporator according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: Evaporator 100, Liquid distributor 10, Cover plate 11, Liquid supply hole 111, Exhaust port 112, Main liquid distribution box 12, Main box body 121, Overflow pipe 122, Main liquid distribution trough 123, Rib 124, Connecting hole 125, Third liquid distribution hole 126, Multi-stage liquid distribution box 13, First liquid distribution box 131, First liquid distribution trough 1311, First bottom wall 1312, First peripheral wall 1313, First liquid distribution hole 1314, Second liquid distribution box 132, Second liquid distribution hole 1321, Liquid distribution chamber 14, Air baffle 15, Main plate 151, Air baffle plate 152, Fixing frame 16, Filter screen 17, Shell 20, Main shell 21, End cap 22, Air intake port 23, Heat exchange tube 30, Tube sheet 40, Partition plate 50, Gas distribution plate 60. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. In the description of this application, 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., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] This disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0031] Please see Figure 1 This application provides a refrigeration device, including an evaporator 100. The evaporator 100 includes a liquid distributor 10. The liquid distributor 10 includes a cover plate 11, a main liquid distributor box 12, and a multi-stage liquid distributor box 13. The cover plate 11 is installed on the top of the main liquid distributor box 12 and forms a liquid distribution cavity 14 with the main liquid distributor box 12. The cover plate 11 has a liquid supply hole 111 and an exhaust port 112 that communicate with the liquid distribution cavity 14. The width of the multi-stage liquid distributor box 13 is smaller than that of the main liquid distributor box 12. The multi-stage liquid distributor box 13 is disposed in the liquid distribution cavity 14 and spaced apart from the main liquid distributor box 12. The multi-stage liquid distributor box 13 communicates with the liquid supply hole 111. The main liquid distributor box 12 includes a main box body 121 and an overflow pipe 122. The overflow pipe 122 is vertically installed at the bottom of the main box body 121 and communicates with the outside of the liquid distributor 10 and the liquid distribution cavity 14.

[0032] The liquid distributor 10 provided in this application performs preliminary distribution of refrigerant by setting up a multi-stage liquid distribution box 13 connected to the liquid supply hole 111, and allows the pre-distributed refrigerant to enter the liquid distribution cavity 14 formed by the cover plate 11 and the main liquid distribution box 12. By using the overflow pipe 122 vertically installed at the bottom of the main liquid distribution box 12, the liquid level in the liquid distribution cavity 14 is adaptively controlled, which helps to avoid the risk of a surge in flow rate and liquid carryover caused by excessive liquid level.

[0033] Specifically, this application provides a refrigeration device, which can be a household air conditioner, a commercial central air conditioner, a cold chain refrigeration system, a high-temperature heat pump, or other equipment that requires refrigeration. The evaporator 100 is one of the key components in the refrigeration cycle of the refrigeration device. Its main function is to absorb heat and cause the liquid refrigerant to evaporate (vaporize), thereby removing heat from the surrounding environment and achieving the purpose of refrigeration or cooling.

[0034] In this embodiment, the evaporator 100 includes a liquid distributor 10. As the core component for refrigerant distribution, the liquid distributor 10 mainly consists of three parts: a cover plate 11, a main liquid distribution box 12, and a multi-stage liquid distribution box 13. The three parts can be detachably connected to facilitate later installation, maintenance, and replacement.

[0035] Furthermore, the cover plate 11 has a plate-like structure, and its size is adapted to the top opening size of the main liquid distribution box 12. Optionally, the cover plate 11 is installed on the top of the main liquid distribution box 12 by means of snap-fit ​​connection or bolt fixation.

[0036] In some embodiments, a sealing gasket is provided between the top edge of the cover plate 11 and the main liquid distribution box 12. The sealing gasket is made of rubber material that is resistant to refrigerant corrosion, which can effectively prevent refrigerant leakage in the liquid distribution cavity 14. The cover plate 11 and the main liquid distribution box 12 enclose a sealed liquid distribution cavity 14, which provides space for the distribution and buffering of refrigerant.

[0037] In this embodiment, the cover plate 11 is provided with a liquid supply hole 111 and an exhaust port 112. The liquid supply hole 111 is connected to the liquid supply pipeline of the refrigeration system and is used to transport liquid refrigerant to the liquid distribution chamber 14. The exhaust port 112 is connected to the return gas pipeline of the refrigeration system and is used to discharge the gaseous refrigerant in the liquid distribution chamber 14 to avoid the gaseous refrigerant from accumulating in the liquid distribution chamber 14 and affecting the liquid distribution effect.

[0038] In this embodiment, the function of the multi-stage liquid distribution box 13 is to distribute the refrigerant evenly multiple times. Its overall width is slightly smaller than that of the main liquid distribution box 12, ensuring that the multi-stage liquid distribution box 13 can be completely contained in the liquid distribution cavity 14. It is also spaced apart from the inner wall of the main liquid distribution box 12. The distance between them must be sufficient to allow the refrigerant to flow smoothly, while avoiding interference between the multi-stage liquid distribution box 13 and the main liquid distribution box 12.

[0039] In this embodiment, the main liquid distribution box 12 includes a main box body 121 and an overflow pipe 122. The main box body 121 has a rectangular structure, and a main liquid distribution tank 123 for containing refrigerant is formed inside it. The overflow pipe 122 is vertically installed at the bottom of the main box body 121. The upper end of the overflow pipe 122 communicates with the liquid distribution chamber 14, and the lower end extends through the bottom of the main box body 121 to the outside of the liquid distributor 10 and communicates with the inside of the evaporator 100. When the liquid level in the liquid distribution chamber 14 is too high, the excess refrigerant will be automatically discharged through the overflow pipe 122, thereby avoiding a sharp increase in refrigerant flow rate due to excessive liquid level and reducing the liquid carryover phenomenon generated by the refrigerant during flow.

[0040] Please see Figure 1 and Figure 2 In some embodiments, the main box 121 is provided with a main liquid trough 123, and the main liquid box 12 also includes a stiffening plate 124. The stiffening plate 124 is provided on the bottom surface of the main liquid trough 123 along the width direction of the main liquid box 12, and a through hole 125 is provided on the stiffening plate 124.

[0041] Thus, by setting ribs 124 along the width direction on the bottom surface of the main liquid distribution tank 123 of the main box body 121 and opening connecting holes 125 on the ribs 124, it is beneficial to enhance the structural strength of the main liquid distribution box 12. At the same time, the liquid in each area of ​​the main liquid distribution tank 123 can be connected through the connecting holes 125, which promotes uniform liquid distribution and further improves the liquid distribution effect.

[0042] Specifically, in this embodiment, the main liquid distribution tank 123 is located on the top of the main box 121 and extends along the length of the main box 121. The cross-section of the main liquid distribution tank 123 is U-shaped or rectangular. Its depth and width are selected according to the overall size and liquid supply of the liquid distributor 10 to ensure that the main liquid distribution tank 123 can hold enough refrigerant and facilitate the smooth flow of refrigerant in the tank.

[0043] Furthermore, the main liquid distribution box 12 also includes a stiffener 124. The stiffener 124 can divide the main liquid distribution tank 123 into several relatively independent areas to prevent mutual interference caused by different flow velocities and directions between different areas, reduce the eddy current phenomenon of refrigerant during flow, and enhance the structural strength of the main liquid distribution box 12. The stiffener 124 is set on the bottom surface of the main liquid distribution tank 123 along the width direction of the main liquid distribution box 12. The length of the stiffener 124 is adapted to the width of the main liquid distribution tank 123 to ensure that the stiffener 124 can completely cover the width direction of the main liquid distribution tank 123. The thickness of the stiffener 124 is designed according to the material of the main liquid distribution box 12 and the overall structural strength requirements, which can effectively enhance the structural stability of the main liquid distribution box 12 without affecting the flow of refrigerant in the main liquid distribution tank 123.

[0044] In this embodiment, the stiffening plate 124 and the main box body 121 are made by an integral molding process to ensure the firmness of the connection between the two and to prevent the stiffening plate 124 from falling off or deforming during use. The integral molding process can also reduce the gaps at the connection parts and reduce the risk of refrigerant leakage.

[0045] In this embodiment of the application, a through hole 125 is provided on the stiffener 124. The through holes 125 are evenly distributed along the length of the stiffener 124. The number of through holes 125 is set according to the length of the stiffener 124 and the liquid distribution requirements, usually 3-5. The shape of the through hole 125 can be circular or square. Its size must be sufficient to allow the refrigerant to pass through smoothly, while avoiding impurities from causing blockage through the through hole 125.

[0046] Please see Figure 1 and Figure 3 In some embodiments, the multi-stage liquid distribution box 13 includes a first liquid distribution box 131 and a second liquid distribution box 132 arranged at intervals along the vertical direction. The first liquid distribution box 131 is connected to the liquid supply hole 111 and is located above the second liquid distribution box 132. The width of the first liquid distribution box 131 is smaller than that of the second liquid distribution box 132.

[0047] In this way, by setting up two liquid distribution boxes with different widths, and connecting the first liquid distribution box 131 with the liquid supply hole 111, the refrigerant first enters the smaller first liquid distribution box 131 for preliminary distribution, and then flows into the larger second liquid distribution box 132 for further distribution, thus achieving multi-stage uniform liquid distribution, which is beneficial to improving the distribution accuracy and stability of the liquid distributor 10.

[0048] Specifically, in the embodiments of this application, the first liquid distribution box 131 and the second liquid distribution box 132 are both box-shaped structures, with the whole being a cuboid or cube. The first liquid distribution box 131 is provided with a first liquid distribution groove 1311, which is located directly below the liquid supply hole 111 and communicates with the liquid supply hole 111.

[0049] The first liquid distribution box 131 is located above the second liquid distribution box 132. In some embodiments, the first liquid distribution box 131 and the second liquid distribution box 132 are connected by support columns. For example, there are four support columns, which are respectively set at the four corners of the first liquid distribution box 131 and the second liquid distribution box 132. The support columns are made of metal and have sufficient structural strength to stably support the first liquid distribution box 131. At the same time, the spacing between the first liquid distribution box 131 and the second liquid distribution box 132 must be ensured. The spacing distance must be sufficient to allow the refrigerant in the first liquid distribution box 131 to flow smoothly into the second liquid distribution box 132 without causing excessive flow rate fluctuations.

[0050] In this embodiment, the width of the first liquid distribution box 131 is smaller than that of the second liquid distribution box 132. The difference in width between the two is selected according to the liquid distribution requirements. Typically, the width of the first liquid distribution box 131 is 1 / 2 to 2 / 3 of the width of the second liquid distribution box 132. This size design can realize the graded distribution of refrigerant and improve the distribution accuracy.

[0051] In this embodiment, the refrigerant first enters the smaller first liquid distribution box 131 for initial distribution. The first liquid distribution box 131 can disperse the concentrated refrigerant into multiple streams, avoiding uneven distribution caused by the refrigerant directly impacting the liquid distribution cavity 14. Then, it flows into the larger second liquid distribution box 132 for further distribution. The second liquid distribution box 132 can further diffuse the refrigerant dispersed by the first liquid distribution box 131, making the distribution of the refrigerant more uniform and realizing multi-stage uniform liquid distribution.

[0052] In some embodiments, the detachable design of the first liquid distribution box 131 and the second liquid distribution box 132 facilitates subsequent cleaning and maintenance of their interiors. When the liquid distribution holes become blocked, they can be quickly disassembled for cleaning, ensuring the normal operation of the liquid distributor 10.

[0053] Please see Figure 1 and Figure 4 In some embodiments, the liquid distributor 10 further includes an air baffle 15, which includes a main board 151 and two air baffles 152. The main board 151 is disposed between the cover plate 11 and the first liquid distribution box 131. The main board 151 has a through hole communicating with the liquid supply hole 111. The two air baffles 152 are installed on both sides of the main board 151 and are located on both sides of the second liquid distribution box 132.

[0054] Thus, by setting a baffle 15 between the cover plate 11 and the first liquid distribution box 131, the liquid refrigerant carried inside the gaseous refrigerant will be blocked by the baffle 15 before the gaseous refrigerant is discharged from the exhaust port 112, thereby allowing the gaseous refrigerant and liquid refrigerant to be fully separated, which helps to avoid liquid being carried in the compressor intake.

[0055] Specifically, in this embodiment, the liquid distributor 10 further includes a baffle 15, which is used to separate the gaseous refrigerant from the liquid refrigerant and prevent the gaseous refrigerant from carrying the liquid refrigerant into the compressor. The baffle 15 consists of a main plate 151 and two baffle plates 152. The main plate 151 has a plate-like structure and its size is adapted to the lower surface of the cover plate 11. The main plate 151 is flat and its width is slightly larger than the width of the second liquid distribution box 132. The bottom of the main plate 151 can be flat, serrated, or grooved, etc., which are conducive to liquid dripping.

[0056] In this embodiment, the main board 151 is disposed between the cover plate 11 and the first liquid distribution box 131. Optionally, the main board 151 is fixedly connected to the cover plate 11 by bolts or clips. The main board 151 has a through hole communicating with the liquid supply hole 111. The size of the through hole is exactly the same as the size of the liquid supply hole 111 and is precisely aligned with the liquid supply hole 111 to ensure that the refrigerant supplied by the liquid supply hole 111 can smoothly pass through the through hole into the first liquid distribution box 131 without being blocked by the main board 151. In some embodiments, a liquid supply pipe may be provided between the main board 151 and the cover plate 11 to connect the liquid supply hole 111 and the through hole.

[0057] In this embodiment, two baffles 152 are symmetrically installed on both sides of the main board 151 and located on both sides of the second liquid distribution box 132. The baffles 152 and the main board 151 are made by welding or integral molding process to ensure the firmness of the connection between the two and to prevent the baffles 152 from falling off or deforming under the impact of airflow. For example, the baffle 15 can be formed by bending a whole piece of metal plate.

[0058] Furthermore, the air baffle 15 is attached to the inside of the top plate of the cover plate 11. To prevent the air baffle 15 from blocking the exhaust port 112, the width of the air baffle 15 should be less than or equal to the width of the top plate.

[0059] In this embodiment, a baffle 15 is provided between the cover plate 11 and the first liquid distribution box 131, so that the gaseous refrigerant must pass through the baffle 15 before it is discharged from the exhaust port 112. The small droplets of liquid refrigerant carried by the gaseous refrigerant during its flow will collide with the main plate 151 and the baffle plate 152 of the baffle 15 and be blocked by the baffle 15, so that the gaseous refrigerant and the liquid refrigerant can be fully separated. The gaseous refrigerant can be discharged smoothly through the exhaust port 112, while the blocked liquid refrigerant will flow back into the liquid distribution chamber 14 to continue to participate in the liquid distribution and heat exchange process.

[0060] Please see Figure 1 and Figure 5 In some embodiments, one end of the baffle plate 152 is connected to the main board 151, and the other end is inclined toward the bottom of the main liquid distribution box 12. The projections of the two baffle plates 152 along the plane perpendicular to the second liquid distribution box 132 are located inside the second liquid distribution box 132.

[0061] Thus, by setting up a baffle plate 152 that slopes downwards, the intercepted droplets can flow smoothly back to the second liquid distribution box 132 by gravity along the inclined surface, avoiding the droplets from accumulating on the baffle plate and being carried away by the airflow again, which is beneficial to improving the separation efficiency and realizing the rapid recovery of condensate.

[0062] Specifically, in this embodiment, one end of the baffle plate 152 is connected to the main board 151, and the connection can be fixed by welding. The other end is inclined towards the bottom of the main liquid distribution box 12. The inclination angle is designed according to the structure of the liquid distribution chamber 14 and the flow characteristics of the refrigerant. Typically, the inclination angle is 30°-60°. Such an inclination angle allows the intercepted droplets to flow smoothly back along the inclined surface by their own gravity, avoiding the accumulation of droplets on the baffle plate.

[0063] In this embodiment, the projections of the two baffles 152 along the plane perpendicular to the second liquid distribution box 132 are located inside the second liquid distribution box 132. That is, the inclined direction of the baffles 152 is towards the two sides of the second liquid distribution box 132 but does not extend outside the second liquid distribution box 132, ensuring that the droplets intercepted by the baffles 152 can accurately flow back into the second liquid distribution box 132 and will not flow back into other areas of the liquid distribution chamber 14, thus ensuring that the liquid refrigerant can continue to participate in the multi-stage liquid distribution process.

[0064] In this embodiment, the width of the baffle plate 152 is adapted to the position of the exhaust port 112 so that the baffle plate 152 can intercept all the droplets carried by the gaseous refrigerant flowing in all directions. The intercepted droplets can flow smoothly back to the second liquid distribution box 132 by gravity along the inclined surface, which avoids the droplets accumulating on the baffle plate and being carried back into the gaseous refrigerant by the airflow. This improves the efficiency of gas-liquid separation and realizes the rapid recovery of condensate, thereby improving the utilization rate of refrigerant.

[0065] Please see Figure 1 and Figure 2 In some embodiments, the first liquid distribution box 131 includes a first bottom wall 1312 and a first peripheral wall 1313 surrounding the first bottom wall 1312, and a first liquid distribution hole 1314 is provided on the first peripheral wall 1313.

[0066] In this way, the liquid refrigerant can be initially dispersed and flowed to the outside, thereby making the distribution of the liquid refrigerant more uniform.

[0067] Specifically, in this embodiment, the first liquid distribution box 131 includes a first bottom wall 1312 and a first peripheral wall 1313 surrounding the first bottom wall 1312. The first bottom wall 1312 and the first peripheral wall 1313 are made by an integral molding process to ensure the sealing of the first liquid distribution box 131 and prevent refrigerant from leaking from the connection part of the first liquid distribution box 131.

[0068] The first bottom wall 1312 is rectangular or square, and its size is set according to the overall width and length of the first liquid distribution box 131. The first peripheral wall 1313 is set perpendicular to the edge of the first bottom wall 1312. The height of the first peripheral wall 1313 is designed according to the capacity requirements of the first liquid distribution box 131 to ensure that the first liquid distribution box 131 can hold enough refrigerant for initial distribution.

[0069] In this embodiment, the first liquid distribution hole 1314 is disposed on the first peripheral wall 1313. The first liquid distribution hole 1314 is evenly distributed along the circumference of the first peripheral wall 1313. The distribution density is set according to the liquid supply and liquid distribution requirements. Typically, multiple first liquid distribution holes 1314 are disposed at intervals on each side of the first peripheral wall 1313. The shape of the first liquid distribution hole 1314 is circular, and its size must be sufficient to allow the refrigerant to flow out smoothly, while avoiding impurities from causing blockage through the liquid distribution hole.

[0070] In some embodiments, the first liquid distribution hole 1314 is located near the bottom of the first peripheral wall 1313, which ensures that as much refrigerant as possible can flow out through the first liquid distribution hole 1314 and reduce the amount of refrigerant remaining in the first liquid distribution box 131.

[0071] Please see Figures 1 to 3 In some embodiments, the bottom of the second liquid distribution box 132 is provided with a second liquid distribution hole 1321, and the bottom of the main liquid distribution box 12 is provided with a third liquid distribution hole 126. The diameter of the second liquid distribution hole 1321 is larger than that of the third liquid distribution hole 126.

[0072] Thus, the larger diameter second liquid distribution hole 1321 achieves coarse liquid distribution, which can reduce inlet flow fluctuations, while the smaller diameter third liquid distribution hole 126 further refines the droplets or liquid film, which is beneficial to enhancing the uniformity of the overall distribution.

[0073] Specifically, the second liquid distribution hole 1321 and the third liquid distribution hole 126 can be circular, square, trapezoidal, or other shapes. The second liquid distribution hole 1321 is located at the bottom of the second liquid distribution box 132, and there are multiple second liquid distribution holes 1321 arranged in an array at the bottom of the second liquid distribution box 132. Similarly, the bottom of the main liquid distribution box 12 is provided with a third liquid distribution hole 126, and there are multiple third liquid distribution holes 126 arranged in an array at the bottom of the main liquid distribution box 12. The spacing of the third liquid distribution holes 126 along the width direction of the liquid distributor 10 is set according to the spacing of the heat exchange tubes 30 below, and corresponds to the heat exchange tubes 30 of the evaporator 100, ensuring that the refrigerant flowing out from the third liquid distribution hole 126 can drip evenly onto the heat exchange tubes 30 to achieve efficient heat exchange.

[0074] Furthermore, the diameter of the second liquid distribution hole 1321 is larger than that of the third liquid distribution hole 126. The projection of the second liquid distribution hole 1321 along the direction perpendicular to the bottom of the main liquid distribution box 12 is staggered with that of the third liquid distribution hole 126. In this way, the liquid refrigerant dripping from the second liquid distribution hole 1321 will not drip directly into the third liquid distribution hole 126 and flow out, thereby avoiding uneven dripping of liquid refrigerant.

[0075] Please see Figure 1 and Figure 5 In some embodiments, the liquid distributor 10 further includes a fixing frame 16 and a filter screen 17, the filter screen 17 being fixed to the cover plate 11 by the fixing frame 16 and covering the exhaust port 112.

[0076] In this way, filter 17 can further filter the liquid refrigerant carried in the gaseous refrigerant, preventing liquid from being drawn into the compressor.

[0077] Specifically, in some embodiments, the distributor 10 further includes a fixing frame 16 and a filter screen 17. The fixing frame 16 has a plate-like structure, and its size is adapted to the size of the exhaust port 112 on the cover plate 11. The pore size of the filter screen 17 is selected according to the requirements, usually 100-200 mesh, which can effectively filter the fine liquid refrigerant droplets carried in the gaseous refrigerant, without affecting the smooth discharge of the gaseous refrigerant.

[0078] In some embodiments, the filter screen 17 is fixed to the cover plate 11 by the fixing frame 16 and covers the exhaust port 112. In this way, the gaseous refrigerant will be filtered again by the filter screen 17 before passing through the exhaust port 112. The filter screen 17 can further filter the small liquid refrigerant droplets carried in the gaseous refrigerant and intercept these droplets on the filter screen 17. The intercepted droplets will flow back into the liquid distribution chamber 14 by gravity and continue to participate in the liquid distribution and heat exchange process, thereby further preventing the compressor from sucking in liquid and protecting the operating safety of the compressor.

[0079] In some embodiments, the fixed frame 16 and the cover plate 11 are connected by a snap-fit, which facilitates the later disassembly and replacement of the filter screen 17.

[0080] In some embodiments, a sealing gasket is provided between the fixing frame 16 and the cover plate 11 to ensure the sealing of the connection and prevent gaseous refrigerant from leaking from the gap between them. The edge of the filter screen 17 is tightly fitted with the edge of the fixing frame 16, and the fixing frame 16 plays a role in fixing and supporting the filter screen 17 to prevent the filter screen 17 from deforming or falling off under the impact of airflow.

[0081] Please see Figure 6 and Figure 7In some embodiments, the evaporator 100 further includes a shell 20, a heat exchange tube 30, and a plurality of partition plates 50. The liquid distributor 10 and the heat exchange tube 30 are disposed inside the shell 20, with the heat exchange tube 30 disposed below the liquid distributor 10. The plurality of partition plates 50 are perpendicular to the length direction of the shell 20 and are spaced apart along the length direction of the shell 20.

[0082] In this way, dividing the heat exchange tube 30 into several regions along the length of the shell 20 can prevent the flow of gaseous refrigerant from interfering with the uniformity of liquid refrigerant in other regions.

[0083] Specifically, the shell 20 includes a main shell 21 and end caps 22 disposed at both ends of the main shell 21. Two tube sheets 40 are disposed inside the shell 20, one inside each end cap 22. Heat exchange tubes 30 are installed between the two tube sheets 40 and suspended inside the shell 20 via the tube sheets 40. A liquid distributor 10 is disposed at the top of the heat exchange tubes 30, and a liquid supply pipe penetrates the shell 20 and extends to the outside of the shell 20.

[0084] The top of the housing 20 is also provided with an air intake 23. It should be noted that the position of the air intake 23 should be adjusted according to the position of the exhaust port 112 to avoid excessive local flow velocity at the exhaust port 112, which would cause the compressor to draw in liquid.

[0085] In some embodiments, the evaporator 100 further includes partition plates 50, and there are multiple partition plates 50. The partition plates 50 are arranged along the length direction perpendicular to the shell 20, and the heat exchange tubes 30 pass through the partition plates 50. The multiple partition plates 50 are evenly spaced between two tube sheets 40.

[0086] In some embodiments, the evaporator 100 further includes a gas distribution plate 60, which is disposed inside the housing 20 and covers the suction port 2323, and is positioned between the liquid distributor 10 and the housing 20. The gas distribution plate 60 has a plurality of evenly distributed air holes to make the gas drawn into the compressor more uniform, and also to filter the gaseous refrigerant again before it enters the compressor, thereby further removing liquid refrigerant carried within the gaseous refrigerant.

[0087] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0089] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A liquid distributor, characterized by, The device includes a cover plate, a main liquid distribution box, and a multi-stage liquid distribution box. The cover plate is installed on top of the main liquid distribution box and surrounds the main liquid distribution box to form a liquid distribution cavity. The cover plate has a liquid supply hole and a vent that communicate with the liquid distribution cavity. The width of the multi-stage liquid distribution box is smaller than that of the main liquid distribution box. The multi-stage liquid distribution box is disposed in the liquid distribution cavity and spaced apart from the main liquid distribution box. The multi-stage liquid distribution box communicates with the liquid supply hole. The main liquid distribution box includes a main box body and an overflow pipe. The overflow pipe is vertically installed at the bottom of the main box body and connects the outside of the liquid distributor to the liquid distribution cavity.

2. The liquid distributor according to claim 1, wherein The main box body is provided with a main liquid trough, and the main liquid trough also includes a rib plate. The rib plate is arranged on the bottom surface of the main liquid trough along the width direction of the main liquid trough, and a through hole is provided on the rib plate.

3. The liquid distributor according to claim 1, characterized in that, The multi-stage liquid distribution box includes a first liquid distribution box and a second liquid distribution box arranged at intervals along the vertical direction. The first liquid distribution box is in communication with the liquid supply hole and is located above the second liquid distribution box. The width of the first liquid distribution box is smaller than that of the second liquid distribution box.

4. The liquid distributor according to claim 3, characterized in that, The liquid distributor also includes an air baffle, which includes a main board and two air baffles. The main board is disposed between the cover plate and the first liquid distribution box. The main board has a through hole communicating with the liquid supply hole. The two air baffles are installed on both sides of the main board and are located on both sides of the second liquid distribution box.

5. The liquid distributor according to claim 4, characterized in that, One end of the air baffle is connected to the main board, and the other end is inclined toward the bottom of the main liquid distribution box. The projections of the two air baffles along the direction perpendicular to the plane where the second liquid distribution box is located are located inside the second liquid distribution box.

6. The liquid distributor according to claim 3, characterized in that, The first liquid distribution box includes a first bottom wall and a first peripheral wall surrounding the first bottom wall, and a first liquid distribution hole is formed on the first peripheral wall.

7. The liquid distributor according to claim 3, characterized in that, The second liquid distribution box has a second liquid distribution hole at its bottom, and the main liquid distribution box has a third liquid distribution hole at its bottom. The diameter of the second liquid distribution hole is larger than that of the third liquid distribution hole.

8. The liquid distributor according to claim 1, characterized in that, The liquid distributor also includes a fixing frame and a filter screen, the filter screen being fixed to the cover plate by the fixing frame and covering the exhaust port.

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

10. The evaporator according to claim 9, characterized in that, The evaporator also includes a shell, heat exchange tubes, and multiple partition plates. The liquid distributor and the heat exchange tubes are disposed inside the shell, with the heat exchange tubes disposed below the liquid distributor. The multiple partition plates are all perpendicular to the length direction of the shell and are spaced apart along the length direction of the shell.

11. A refrigeration device, characterized in that, Includes the evaporator as described in claim 9 or 10.

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