Modular y-shaped anti-suction liquid-carrying baffle structure and flooded evaporator

Abstract

The utility model discloses a modularization Y type anti -suction belt liquid baffle structure and full -liquid evaporator. The baffle structure includes two -stage Y type baffle array, baffle fender and convex type clamping groove, two -stage baffle misplacement arrangement, interval 3 4mm, vertical interval 0.25mm, are fixed through fender Y type groove, and the modularization installation is realized to bottom convex type clamping groove and evaporator inner wall groove clamping groove cooperation. Its two -stage separation mechanism can high -efficiently intercept the liquid refrigerant in gas -liquid mixture, and separation efficiency is greater than or equal to 95%, and flow resistance is less than or equal to 50Pa. Full -liquid evaporator sets this baffle structure below compressor suction port, is fixed through clamping groove, significantly reduces the risk of liquid knock, and installation and maintenance are convenient, adapts to different pipe diameter evaporator, and is applicable to the safe and efficient operation scene of refrigeration system.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration equipment technology, specifically relating to a modular Y-type anti-suction baffle structure and a full-liquid evaporator. Background Technology

[0002] In refrigeration systems, the evaporator is the core component for heat exchange, its function being to vaporize liquid refrigerant and absorb heat. However, in actual operation, incomplete refrigerant vaporization often leads to a gas-liquid mixture being drawn into the compressor, causing the "liquid carryover" problem. Liquid carryover reduces system efficiency and, more seriously, can cause compressor liquid slugging, damaging internal components.

[0003] In existing technologies, traditional anti-liquid-carrying structures mostly employ filter screens or single-layer baffle designs. For example, Chinese utility model patent CN 208804910 U discloses a multi-stage gas equalization perforated plate structure and a full-liquid evaporator for preventing gas suction and liquid carryover. Although it can achieve gas-liquid separation, the filter screen structure has limited liquid interception efficiency, and the fixing method is mostly welding, which is inconvenient for installation and maintenance, and it is difficult to adapt to the mass production needs of evaporators of different sizes.

[0004] In view of this, developing a highly efficient, compact, and modularly installable baffle structure is a technical problem that urgently needs to be solved in the current refrigeration field. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention proposes a modular Y-type anti-suction liquid baffle structure and a full-liquid evaporator to solve the system safety and efficiency problems caused by liquid carryover during compressor suction.

[0006] Firstly, this utility model proposes a modular Y-type anti-suction and liquid-carrying baffle structure, comprising: a dual-stage Y-type baffle array, wherein the Y-type baffles include staggered first-stage Y-type baffles and second-stage Y-type baffles, with a horizontal distance of 3-4 mm between adjacent first-stage Y-type baffles, the second-stage Y-type baffles being located directly above the center of the first-stage Y-type baffles, and the distance between the bottom of the second-stage Y-type baffle and the top of the first-stage Y-type baffle being 0.25 mm, forming a dual-stage gas-liquid separation structure; and a baffle guard plate, wherein Y-type grooves for fixing the Y-type baffles are provided on both sides of the baffle guard plate; and a convex slot is provided at the bottom of the baffle guard plate, the convex slot cooperating with the guard plate slot on the inner wall of the evaporator cylinder to achieve modular installation. By adopting a dual-stage Y-type baffle staggered array and modular guard plate design, efficient secondary gas-liquid separation is achieved, installation is convenient, the flow field is stable, and the safety and reliability of the refrigeration system are improved.

[0007] Preferably, the angle between the branch of the Y-shaped baffle and the vertical direction is 145° to 155°.

[0008] By adopting the above technical solution, this angle range avoids the flow channel being too narrow and affecting the airflow, while ensuring that the branch can effectively intercept the liquid in the gas-liquid mixture, thereby improving the gas-liquid separation effect.

[0009] Preferably, the horizontal width of the Y-shaped baffle is 2mm and the vertical height is 3.8mm.

[0010] By adopting the above technical solution, the geometric dimensions of the baffle are precisely defined, so that the cross-sectional area of ​​the flow channel and the gas-liquid contact area are optimally balanced, maximizing the liquid interception efficiency while ensuring the airflow rate.

[0011] Preferably, the surface of the Y-shaped baffle is provided with a hydrophobic coating.

[0012] By adopting the above technical solution, the liquid-repellent coating can reduce the adhesion between the liquid refrigerant and the baffle surface, causing the droplets to coalesce and slide down to the evaporator more quickly, thereby further improving the separation efficiency and reducing liquid retention.

[0013] Preferably, the depth of the Y-shaped groove of the baffle plate matches the thickness of the Y-shaped baffle.

[0014] By adopting the above technical solution, the Y-shaped baffle and the guard plate are precisely matched, the structure is stable and does not shake after installation, bypassing of gas-liquid mixture is avoided, the separation efficiency is improved, and the convenience and reliability of modular installation are guaranteed.

[0015] Preferably, the number of levels of the dual-level Y-shaped baffle array can be expanded to three or more, with the third-level Y-shaped baffle located directly above the center of the second-level Y-shaped baffle.

[0016] By adopting the above technical solutions, the gas-liquid separation effect can be further enhanced. The multi-level staggered interception makes the liquid refrigerant separation more thorough, which is suitable for operating conditions with higher liquid risk or harsh conditions, and improves the system's adaptability and reliability.

[0017] Secondly, this utility model also proposes a full-liquid evaporator, including the modular Y-shaped anti-suction and liquid-carrying baffle structure as described in the first aspect, and further including: the baffle structure is located below the compressor suction port inside the evaporator cylinder, and the baffle structure is fixedly connected to the inner wall of the cylinder through a protective plate slot.

[0018] By adopting the above technical solution, the modular Y-shaped baffle structure is placed below the compressor intake port and fixed by the guard plate slot, which can efficiently separate gas and liquid, reduce the risk of liquid slugging, and is easy to install and highly adaptable.

[0019] Preferably, the groove on the inner wall of the evaporator cylinder is a recessed groove, which complements the shape of the convex groove at the bottom of the baffle plate.

[0020] By adopting the above technical solution, the groove and convex slots complement each other, achieving a tight fit and precise positioning, enhancing the stability of the baffle structure installation, avoiding shaking or bypass, and improving the reliability of gas-liquid separation.

[0021] Compared with the prior art, the beneficial results of this utility model are as follows:

[0022] (1) The “Y” structure design is adopted. The droplets adsorbed on the baffle can fall back to the liquid surface of the evaporator under the influence of gravity and re-enter the circulation. The array structure is evenly distributed, the airflow throughput is high, and the flow velocity in the front and back of the baffle is stable. The upper branch of the double-stage Y-shaped baffle structure can change the direction of fluid movement. The denser liquid will be blocked on the branch baffle. The double-layer structure can perform a secondary “blocking” effect on the liquid, further improving the gas-liquid separation efficiency, so that most of the fluid flowing into the compressor suction port is gas.

[0023] (2) The baffle structure adopts a modular design. The Y-shaped baffle and the baffle guard plate with Y-shaped groove can be mass-produced according to the required size. During installation, the Y-shaped baffle is inserted into the Y-shaped groove on the baffle guard plate to complete the installation. The protrusions on both sides of the guard plate cooperate with the guard plate slot welded to the inner wall of the evaporator to make the baffle structure firmly fixed, easy to install, and improve the convenience of operation. This innovative design not only optimizes the gas-liquid separation effect, but also greatly improves the operating efficiency and maintenance convenience of the equipment. Attached Figure Description

[0024] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0025] Figure 1 This diagram shows the overall structure of the modular Y-type anti-suction baffle structure and the full-liquid evaporator according to an embodiment of the present invention.

[0026] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0027] Figure 3 A schematic diagram showing the dimensions of a dual-stage Y-shaped baffle structure according to an embodiment of the present invention is shown;

[0028] Figure 4 A partial schematic diagram of the gas-liquid two-phase fluid flow achieved by the dual-stage Y-shaped baffle structure according to an embodiment of the present invention is shown.

[0029] Figure 5 A side view of a modular Y-shaped anti-suction liquid baffle structure according to an embodiment of the present invention is shown;

[0030] Figure 6 for Figure 5 A magnified structural diagram of part B.

[0031] The meanings of the numbers in the diagram are as follows: 1. Y-type baffle; 11. First-stage Y-type baffle; 12. Second-stage Y-type baffle; 2. Baffle guard plate; 3. Convex groove; 4. Guard plate groove; 5. Compressor suction port; 6. Evaporator shell; 7. Heat exchange tube; 8. Evaporator liquid supply pipe. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] This invention proposes a modular Y-type anti-suction baffle structure and a full-liquid evaporator. Figure 1 A schematic diagram of the overall structure of the modular Y-type anti-suction baffle structure and the flooded evaporator according to an embodiment of the present invention is shown. Figure 1 and 2 As shown, the modular Y-type anti-suction and liquid-carrying baffle structure and the full-liquid evaporator include a double-stage Y-type baffle 1, a baffle guard plate 2, a convex groove 3, a guard plate groove 4, a compressor suction port 5, an evaporator cylinder 6, a heat exchange tube 7, and an evaporator liquid supply pipe 8.

[0035] like Figure 2 and Figure 3As shown, the modular Y-type anti-suction and liquid-carrying baffle structure includes a two-stage Y-type baffle array and a baffle guard plate 2. The Y-type baffle 1 includes a first-stage Y-type baffle 11 and a second-stage Y-type baffle 12 arranged in a staggered manner. The horizontal distance between adjacent first-stage Y-type baffles 11 is 3-4 mm. The second-stage Y-type baffle 12 is located directly above the center of the first-stage Y-type baffle 11, and the distance between the bottom of the second-stage Y-type baffle 12 and the top of the first-stage Y-type baffle 11 is 0.25 mm, forming a two-stage gas-liquid separation structure. Y-shaped grooves for fixing the Y-type baffles 1 are provided on both sides of the baffle guard plate 2. A convex groove 3 is provided at the bottom of the baffle guard plate 2, which cooperates with the guard plate groove 4 on the inner wall of the evaporator cylinder 6 to achieve modular installation. By adopting a two-stage Y-type baffle staggered array and modular guard plate design, efficient secondary gas-liquid separation is achieved, installation is convenient, the flow field is stable, and the safety and reliability of the refrigeration system are improved.

[0036] Specifically, such as Figure 1 and Figure 3 As shown, in this embodiment, the horizontal width of the Y-shaped baffle 1 is 2mm, and the vertical height is 3.8mm. The angle between the branches of the Y-shaped baffle 1 and the vertical direction is 145° to 155°. If the angle is too large, the flow channel will be narrowed, which is not conducive to fluid flow; if the angle is too small, the branch structure will not be sufficient to "intercept" the liquid in the gas-liquid mixture, resulting in poor liquid separation effect. Preferably, the angle between the two baffle branches and the vertical baffle is 150°. In other embodiments, the angle between the branches of the Y-shaped baffle 1 directly below the compressor suction port 5 and the vertical baffle can be reduced, and an applicability design can be made according to the actual situation to make the gas-liquid separation effect directly below the compressor suction port 5 better.

[0037] The horizontal spacing between each baffle is uniformly arranged in an array between 3 and 4 mm. The second-level Y-shaped baffles 12 are arranged in an array staggered with the spacing of the first-level Y-shaped baffles 11 above the center of the two first-level Y-shaped baffles 1, and the bottom of the second-level Y-shaped baffles 12 is located 0.25 mm below the top of the first-level Y-shaped baffles 11.

[0038] Preferably, the surface of the Y-shaped baffle 1 is provided with a liquefying coating. For example, a liquefying coating made primarily of polytetrafluoroethylene can reduce droplet adhesion resistance. The liquefying coating can reduce the adhesion between the liquid refrigerant and the baffle surface, causing droplets to coalesce and slide down to the evaporator more quickly, further improving separation efficiency and reducing liquid retention.

[0039] Furthermore, the depth of the Y-shaped groove in the baffle plate 2 matches the thickness of the Y-shaped baffle 1. This ensures a precise fit between the Y-shaped baffle and the baffle plate, resulting in a stable and wobbly structure after installation. This prevents bypassing of the gas-liquid mixture, improves separation efficiency, and guarantees the convenience and reliability of modular installation.

[0040] In a preferred embodiment, the number of stages in the dual-stage Y-shaped baffle array can be expanded to three or more, with the third-stage Y-shaped baffle located directly above the center of the second-stage Y-shaped baffle 12. This further enhances the gas-liquid separation effect, and the multi-stage staggered interception ensures more thorough separation of the liquid refrigerant, making it suitable for conditions with higher liquid carryover risk or harsher operating conditions, thus improving system adaptability and reliability. The number of stages in the Y-shaped baffle array 1 can be designed to suit specific usage conditions and requirements.

[0041] like Figure 1 and Figure 4 As shown, in the operation of a flooded evaporator, the liquid refrigerant injected into the evaporator supply pipe 8 typically submerges all heat exchange tubes 7. As the compressor operates, influenced by the airflow in the compressor suction port 5, the gas-liquid mixture in the container is discharged upwards through the compressor suction port 5. When the gas-liquid mixture enters the two-stage Y-shaped baffle 1 structure, it first enters the first-stage Y-shaped baffle 11. Due to the branched flow channels and array combination structure formed by the Y-shaped baffle 1, the liquid in the gas-liquid mixture, due to its higher density, adheres to the baffle surface upon contact. Most of the liquid adheres to the surface of the first-stage Y-shaped branch baffle. The branch baffle changes the flow channel direction, causing most of the liquid to accumulate on the second-stage vertical baffle. As the fluid continues to move along the flow channel, a small amount of residual liquid adheres to the surface of the second-stage Y-shaped branch baffle. The gas in the gas-liquid mixture, due to its lower density, flows upwards along the flow channel. The two-stage Y-shaped baffle 1 structure enables secondary separation of the gas-liquid mixture, enhancing the gas-liquid separation effect and thus preventing the occurrence of liquid carryover during suction.

[0042] Furthermore, due to the high airflow velocity below the compressor suction port 5, the fluid has a high vertical upward flow velocity, and a large amount of liquid will be adsorbed by the two-stage Y-shaped baffle 1. Furthermore, the liquid adsorbed on the baffle will eventually fall back along the vertical baffle to the liquid phase region at the bottom of the evaporator under the influence of gravity to continue the cycle of phase change heat transfer.

[0043] like Figure 5 and 6 As shown, Y-shaped grooves are formed on both sides of the baffle plate 2 according to the aforementioned dimensions. Furthermore, the Y-shaped baffle 1 can cooperate with the Y-shaped grooves on both sides of the baffle plate 2, and the Y-shaped baffle 1 is fixedly installed in the baffle plate 2 through the Y-shaped grooves. The entire Y-shaped baffle 1 structure is installed and fixed to the concave baffle groove 4 on the inner wall of the compressor through the convex groove 3. The convex groove and the concave groove 4 cooperate with each other, allowing the baffle to be stably fixed in the evaporator. Unlike traditional baffles that are fixedly welded to the inner wall of the evaporator, this modular structure design facilitates installation and can be designed and mass-produced according to different size requirements. The concave and convex grooves 3 are complementary in shape, achieving a tight fit and precise positioning, enhancing the stability of the baffle structure installation, preventing shaking or bypass, and improving the reliability of gas-liquid separation.

[0044] The manufacturing, installation, and operational testing of the Y-type baffle in this embodiment are described in detail below:

[0045] Processing steps:

[0046] Y-shaped baffle 1 is made of stainless steel sheet by stamping, with a branch angle of 152° and a horizontal spacing of 3.5mm;

[0047] The baffle plate 2 is CNC machined to have a Y-shaped groove, the groove depth of which matches the thickness of the baffle (tolerance ±0.1mm);

[0048] The bottom of the protective plate is machined with a convex groove 3, the size of which is interference-fitted with the concave groove on the inner wall of the evaporator (interference amount 0.05mm).

[0049] Installation process:

[0050] Insert the Y-shaped baffle 1 into the Y-shaped groove of the protective plate and tap it gently to ensure that it is not loose;

[0051] The protective plate is embedded into the groove on the inner wall of the evaporator through the convex slot 3 and is fixed with bolts.

[0052] Check the levelness of the baffle array; the deviation should be controlled within ±0.5mm.

[0053] Test conditions:

[0054] The flooded evaporator uses R134a refrigerant, and the compressor suction flow rate is 200 m³ / h. 3 / h, the liquid level covers all heat exchange tubes 7;

[0055] Test results:

[0056] The gas-liquid separation efficiency reaches 96.3%, and the droplet residue is less than 0.5%.

[0057] The system pressure drop is 120 Pa, which is 20% lower than that of a traditional single-stage baffle (150 Pa);

[0058] The module assembly and disassembly time is ≤15 minutes, significantly improving maintenance efficiency.

[0059] In summary, the innovative design disclosed in this utility model embodiment not only optimizes the gas-liquid separation effect, but also greatly improves the operating efficiency and maintenance convenience of the equipment.

[0060] The specific embodiments of this utility model have been described above, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

[0061] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 a limitation of this utility model. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A modular Y-type anti-suction liquid carryover baffle structure, characterized in that, include: A dual-stage Y-shaped baffle array, comprising a first-stage Y-shaped baffle and a second-stage Y-shaped baffle arranged in a staggered manner, wherein the horizontal distance between adjacent first-stage Y-shaped baffles is 3-4 mm, the second-stage Y-shaped baffle is located directly above the center of the first-stage Y-shaped baffle, and the distance between the bottom of the second-stage Y-shaped baffle and the top of the first-stage Y-shaped baffle is 0.25 mm, forming a dual-stage gas-liquid separation structure; A baffle guard plate, wherein Y-shaped grooves for fixing the Y-shaped baffle are provided on both sides of the baffle guard plate; The bottom of the baffle plate is provided with a convex groove, which cooperates with the guard plate groove on the inner wall of the evaporator cylinder to achieve modular installation.

2. The modular Y-type gas and liquid entrainment barrier structure of claim 1, wherein, The angle between the branch of the Y-shaped baffle and the vertical direction is 145° to 155°.

3. The modular Y-type gas and liquid entrainment barrier structure of claim 1, wherein, The Y-shaped baffle has a horizontal width of 2mm and a vertical height of 3.8mm.

4. The modular Y-type gas and liquid entrainment barrier structure of claim 1, wherein, The surface of the Y-shaped baffle is coated with a hydrophobic coating.

5. The modular Y-type gas and liquid entrainment barrier structure of claim 1, wherein, The depth of the Y-shaped groove of the baffle plate matches the thickness of the Y-shaped baffle.

6. The modular Y-type gas and liquid entrainment barrier structure of claim 1, wherein, The number of levels in the dual-level Y-shaped baffle array can be expanded to three or more, with the third-level Y-shaped baffle located directly above the center of the second-level Y-shaped baffle.

7. A flooded evaporator characterized by The modular Y-type anti-suction liquid baffle structure as described in any one of claims 1-6 further includes: The baffle structure is located below the compressor suction port inside the evaporator cylinder, and the baffle structure is fixedly connected to the inner wall of the cylinder through a protective plate slot.

8. The flooded evaporator of claim 7, wherein, The groove on the inner wall of the evaporator cylinder is recessed, which complements the shape of the convex groove at the bottom of the baffle plate.

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