Lock ring for connecting filter with condenser and capillary tube in refrigerating device
By combining the Lock ring structure with the sealing liquid ring curing layer, the problems of complex process and insufficient sealing in the connection between the filter, condenser and capillary are solved, realizing a low-cost and efficient connection method, and improving the stability and life of the refrigeration system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI VULKAN TECH CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-17
AI Technical Summary
In existing refrigeration systems, the connection between the filter, condenser, and capillary tube is usually achieved by brazing, which has the problems of complex process, high cost, strict operation requirements, and easy micro-leakage after long-term use.
The filter is connected to the condenser and capillary tube using a Lock ring structure. The Lock ring 1 and Lock ring 2 are stacked and compressed with the large and small ends of the filter. The sealing is achieved by combining the sealing liquid with the annular curing layer to avoid annealing and softening, thus ensuring hardness. The correct installation direction is ensured by identifying the annular groove.
It achieves low-cost, high-sealing and easy-to-install connections, improves the assembly efficiency and system reliability of the refrigeration system, reduces the cost and operational complexity of traditional welding, and extends the service life of pipelines.
Smart Images
Figure CN224136142U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration equipment pipeline connection technology, specifically to a structure based on using a Lock ring to connect a filter and a condenser, and a filter and a capillary tube, which is suitable for cold connection of pipeline components in a refrigeration system. Background Technology
[0002] A condenser is a component of a refrigeration system, a type of heat exchanger that converts gas or vapor into liquid, rapidly transferring heat from the tubes to the surrounding air. The condenser's operation is exothermic, resulting in relatively high temperatures. Cooling is primarily achieved through condenser tubes. The evaporator, on the other hand, absorbs and removes heat from the surrounding environment. It causes liquid refrigerant to evaporate into a gaseous state under low pressure through capillary action, increasing its volume and thus lowering the temperature of the object being cooled. In refrigeration equipment, the evaporator is typically installed in the space requiring cooling.
[0003] In refrigeration systems, the connections between filters, condensers, and capillary tubes are typically made using brazing (such as high-silver soldering). However, soldering has the following drawbacks:
[0004] 1. The process is complex and requires high-temperature operation, which can easily cause thermal deformation of components;
[0005] 2. Welding materials are expensive, and the technical requirements for operators are stringent;
[0006] 3. After long-term use, micro-leakage may occur at the solder joints, affecting the system's sealing performance.
[0007] While existing Lock ring technology has been used in condenser piping connections, it has not yet been extended to the connection of filters and capillary tubes. Therefore, there is an urgent need for a low-cost, high-sealing, and easy-to-install cold connection solution. Utility Model Content
[0008] Purpose of the utility model: To provide a Lock ring structure for connecting the filter, condenser and capillary tube in a refrigeration device, so as to realize the cold connection between the filter, condenser and capillary tube, and improve assembly efficiency and system reliability.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] The connection structure between the evaporator and condenser inside the refrigerator includes a capillary tube for the evaporator connected to the small end of the filter, and a condenser tube for the condenser connected to the large end of the filter. The connection structure includes a Lock ring I, a Lock ring II, a condenser tube, a capillary tube, and a special filter for cold connection.
[0011] The condenser tubing is connected to the large end of the filter via a Locking ring 2, and the evaporator tubing is connected to the small end of the filter via a Locking ring 2. Both connection points use Locking rings to compress and stack the inner and outer tubing, making the operation simple.
[0012] The filter's large end connection section is provided with a limiting groove, the capillary tube connection section is provided with a limiting protrusion, there is a sealing liquid annular curing layer between the filter's large end connection section and the condenser tube connection section, and there is a sealing liquid annular curing layer between the filter's small end connection section and the capillary tube connection section.
[0013] For cold-connected special filters, the large end connection section should be protected from annealing and softening during manufacturing to ensure sufficient hardness for easy installation of the LOCK ring.
[0014] The length of the capillary connector section must be sufficient to ensure that after it is inserted into the small end connector section of the filter, it passes through the internal flared opening of the small end of the filter to prevent the capillary from being blocked by the sealing liquid.
[0015] For cold-connection filters, the large end connection section must be straight and at least 17mm long. The small end connection section must also be straight and at least 8mm long.
[0016] A sealing layer formed by a sealant is created between the outer tube and the inner tube.
[0017] As a further description of the above technical solution:
[0018] The outer surfaces of the first and second Locke rings are provided with identification annular grooves.
[0019] As a further description of the above technical solution:
[0020] The filter's large end extends 1 mm through the interior of the Lock ring.
[0021] As a further description of the above technical solution:
[0022] The small end of the filter extends 1 mm through the interior of the second Lock ring.
[0023] As a further description of the above technical solution:
[0024] The sealing fluid is an anaerobic sealant.
[0025] As a further description of the above technical solution:
[0026] The outer surface of the condenser tube and the connection limiting part of the large end of the filter form a first sealing liquid annular solidification layer.
[0027] As a further description of the above technical solution:
[0028] The outer surface of the capillary tube forms a second sealing liquid annular curing layer with the flared end of the filter.
[0029] As a further description of the above technical solution:
[0030] The filter's large-end connection section is located between the Lock ring and the condenser tube connection section.
[0031] As a further description of the above technical solution:
[0032] The small end connection section of the filter is located between the second Lock ring and the capillary connection section.
[0033] As a further description of the above technical solution:
[0034] The inner diameter of the filter's large-end connection section is 0.2mm to 0.4mm larger than the outer diameter of the condenser tube connection section.
[0035] As a further description of the above technical solution:
[0036] The inner diameter of the small end connection section of the filter is 0.2mm to 0.4mm larger than the outer diameter of the capillary connection section.
[0037] As a further description of the above technical solution:
[0038] The filter's large-end connection section should be protected from annealing and softening during manufacturing to ensure sufficient hardness for easy installation of the locating ring.
[0039] As a further description of the above technical solution:
[0040] The length of the capillary connector section must be sufficient to ensure that after it is inserted into the small end connector section of the filter, it passes through the internal flared opening of the small end of the filter to prevent the capillary from being blocked by the sealing liquid.
[0041] As a further description of the above technical solution:
[0042] The large end connection section of the filter must be straight and its length must be no less than 17mm.
[0043] As a further description of the above technical solution:
[0044] The small end connection section of the filter must be straight and its length must be no less than 8mm.
[0045] This utility model has the following beneficial effects:
[0046] The refrigeration unit features a Lock ring connection structure between the filter and condenser tube, and between the filter and capillary tube. During use, the Lock ring 1, Lock ring 2, filter large end connection section, condenser tube, filter small end connection section, capillary tube, identification annular groove, connection limiting part, and sealing fluid. The identification annular groove facilitates installation, making it easy for users to identify the installation direction and preventing misoperation. During crimping, tools are used to extend the filter large end through Lock ring 1 by 1mm, and the filter small end through Lock ring 2 by 1mm, facilitating the connection between the outer tube and the inner tube. The system features quick-connection; the inner diameter of the filter's large-end connection section is 0.2mm~0.4mm larger than the outer diameter of the condenser tube connection section, and the inner diameter of the filter's small-end connection section is 0.2mm~0.4mm larger than the outer diameter of the capillary tube connection section. This creates a gap between the inner and outer tubes, allowing the sealing fluid to evenly fill the gap through capillary action. Lock ring one provides a tight seal between the filter's large end and the condenser tube, while lock ring two provides a tight seal between the filter's small end and the capillary tube, preventing loosening. Operation is simple, installation is easy, and it offers better sealing and stability, while extending the pipeline's lifespan. Furthermore, the lock ring connection replaces traditional high-silver welding, resulting in lower costs. Attached Figure Description
[0047] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0048] Figure 2 This is a schematic diagram and enlarged view of the internal structure of this utility model;
[0049] Legend:
[0050] 1. Condenser; 2. Locke ring I; 3. Filter; 4. Locke ring II; 5. Capillary tube; 6. Condenser; 7. Evaporator; 8. First sealing liquid annular curing layer; 9. Second sealing liquid annular curing layer; 31. Large end connection section; 32. Filter large end connection limiting part; 33. Small end connection section; 51. Capillary tube connection limiting part; 52. Capillary tube connection section; 331. First compression section; 334. Second compression section. Detailed Implementation
[0051] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0054] Reference Figure 1-2 One embodiment of this utility model is a Lock ring connection structure for connecting the filter and the condenser tube, and the filter and the capillary tube in a refrigeration device, comprising Lock ring 1 2, condenser tube 1, capillary tube 5, filter 3, and Lock ring 2 4.
[0055] The condenser tube 1 is connected to the filter large end connection section 31 via a Lock ring 2, and the condenser tube 1 and the filter large end connection section 31 are stacked together. The Lock ring 2 tightens the condenser tube 1 and the filter large end connection section 31 to form a circumferential overlapping compression seal. Specifically, the condenser tube 1 is inserted into the cavity of the filter large end connection section 31 and close to the filter large end connection limiting part 32. After filling the gap between the filter large end connection section 31 and the condenser tube 1 with sealing liquid, the Lock ring 2 is then tightly fitted onto the outer peripheral wall of the filter large end connection section 31, so that the filter large end connection section 31 and the condenser tube 1 form a circumferential compression overlapping seal. At the same time, the sealing liquid is pushed to the connection limiting part 32 of the filter large end connection section 31 to form a first sealing liquid annular solidification layer 8.
[0056] The capillary tube 5 is connected to the filter small end connection section 33 via a second Lock ring 4, and the capillary tube 5 and the filter small end connection section 33 are stacked together. The second Lock ring 4 tightly fits the capillary tube 5 and the filter small end connection section 33 to form a circumferential overlapping compression seal. Specifically, the capillary tube 5 is inserted into the cavity of the filter small end connection section 33, and the protrusion of the capillary tube connection limiting part 51 abuts against the opening of the filter small end connection section 33. After filling the gap between the filter small end connection section 33 and the capillary connection section 52 with sealing liquid, the second Lock ring 4 is then tightly fitted onto the outer peripheral wall of the filter small end connection section 33, so that a circumferential compression overlapping seal is formed between the filter small end connection section 33 and the capillary connection section 52. At the same time, the sealing liquid is pushed to the flared opening of the filter small end connection section 33 to form a second sealing liquid annular curing layer 9.
[0057] The large end connection section 31 of the cold-connection special filter should be protected from annealing softening during the manufacturing process to ensure sufficient hardness for easy installation of the Lock ring.
[0058] The length of the capillary connecting section 52 must be sufficient to ensure that after it is inserted into the small end connecting section 33 of the filter, it passes through the internal flared opening of the small end of the filter to avoid the capillary being blocked by the sealing liquid.
[0059] The large end connection section 31 of the cold-connection special filter must be straight and have a length of not less than 17mm. The small end connection section 33 of the cold-connection special filter must be straight and have a length of not less than 8mm.
[0060] The outer surfaces of the first and second Locke rings are provided with identification annular grooves, which make it easier for people to identify the installation direction during installation and prevent misoperation.
[0061] The large end of the filter extends 1mm through the interior of the Locke Ring 2, which allows operators to quickly determine the effectiveness of the crimping operation.
[0062] The small end of the filter extends 1mm through the interior of the Locke Ring II 4, which allows operators to quickly determine the effectiveness of the crimping operation.
[0063] The first sealing liquid annular curing layer 8 is composed of anaerobic sealant. The first sealing liquid annular curing layer 8 can make a sealing connection between the large end of the filter and the condenser tube, thereby improving the sealing performance.
[0064] The second sealing liquid annular curing layer 9 is composed of anaerobic sealant. The second sealing liquid annular curing layer 9 can make a sealing connection between the small end of the filter and the capillary tube, thereby improving the sealing performance.
[0065] The filter large end connection section 31 is provided with a filter large end connection limiting part 32 to ensure sufficient insertion depth;
[0066] The capillary connecting section 52 is provided with a capillary connecting limiting part 51 to ensure sufficient insertion depth;
[0067] The inner diameter of the filter's large-end connection section 31 is 0.2mm~0.4mm larger than the outer diameter of the condenser tube, forming a certain gap, which is beneficial to the capillary effect of the sealing fluid, so that the sealing fluid fills the entire gap.
[0068] The inner diameter of the small end connecting section 33 of the filter is 0.2mm~0.4mm larger than the outer diameter of the capillary connecting section 52, forming a certain gap, which is conducive to the capillary effect of the sealing fluid, so that the sealing fluid fills the entire gap.
[0069] The filter's large-end connection section 31 should be protected from annealing softening during manufacturing to ensure sufficient hardness for easy installation of the locating ring.
[0070] The length of the capillary connecting section 52 must be sufficient to ensure that after it is inserted into the small end connecting section 33 of the filter, it passes through the internal flared opening of the small end of the filter to avoid the capillary being blocked by the sealing liquid.
[0071] The large end connection section 31 of the filter must be straight and its length must be no less than 17mm.
[0072] The small end connection section 33 of the filter must be straight and its length must be no less than 8mm.
[0073] The large end connection section 31 of the filter 3 is connected to the condenser tube 1 through the Lock ring 2 to form the first compression section 311.
[0074] The small end connecting section 33 of the filter 3 and the capillary connecting section 52 are connected by tearing the Locke ring 4 to form the second compression section 334.
[0075] Working principle: The condenser tube 1 is inserted into the cavity of the filter large end connection section 31, abutting against the filter large end connection limiting part 32. After filling the gap between the condenser tube 1 connection section and the filter large end connection section 31 with sealing liquid, the Lock ring 2 is tightly fitted onto the outer circle of the filter large end connection section 31, so that the condenser tube 1 connection section and the filter large end connection section 31 form a circumferential compression and overlapping seal. At the same time, the sealing liquid is pushed to the filter large end connection limiting part 32 to form the first sealing liquid annular solidification layer 8. The capillary tube 5 is inserted into the cavity of the small end connecting section 33 of the filter, abutting against the capillary tube connection limiting part 51. After filling the gap between the capillary tube connecting section 52 and the small end connecting section 33 with sealing liquid, the second Lock ring 4 is tightly fitted onto the outer circumference of the small end connecting section 33 of the filter, so that a circumferential compression and overlapping seal is formed between the capillary tube connecting section 52 and the small end connecting section 33 of the filter. At the same time, the sealing liquid is pushed to the flared end of the small end connecting section 33 of the filter to form a second sealing liquid annular solidification layer 9. The first Lock ring 2 can tightly fix the large end connecting section 31 of the filter to the condenser tube 1, and the second Lock ring 4 can tightly fix the small end connecting section 33 of the filter to the capillary connecting section 52, preventing the connection from loosening. The operation is simple and facilitates pipeline connection. At the same time, it has better sealing performance and stability, and can improve the service life of the condenser tube. In addition, the Lock ring connection replaces the traditional high silver welding, which is lower in cost and has certain practicality.
[0076] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0077] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A lock ring for connecting filter with condenser and capillary in a refrigeration unit, characterized in that, include: Condenser (1), filter (3) and capillary tube (5); The condenser tube (1) is connected to one end of the filter (3) via a Lock ring one (2), and the capillary tube (5) is connected to the other end of the filter (3) via a Lock ring two (4); The filter (3) is provided with a filter large end connection limiting part (32) at the large end, and the end of the filter to the pipe opening is a large end connection section (31). The capillary tube (5) is provided with a capillary connection limiting part (51), and its end to the tube opening is a capillary connection section (52). The connecting section of the condenser tube (1) is inserted into the cavity of the large end connecting section (31) of the filter (3) and abuts against the large end connecting limit part (32) of the filter (3). A first sealing liquid annular curing layer (8) is formed on the outer surface of the condenser tube (1) corresponding to the limiting part of the large end connection section (31) of the filter (3). A second sealing liquid annular curing layer (9) is formed on the outer surface of the capillary (5) at the flared end of the small end connecting section (33) of the filter (3).
2. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, The outer surface of the first (2) and the second (4) of the Locke ring is provided with an identification annular groove.
3. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, One end of the large end connecting section (31) of the filter (3) extends a certain distance through the interior of the first Lock ring (2); one end of the small end connecting section (33) of the filter (3) extends a certain distance through the interior of the second Lock ring (4).
4. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, After filling the gap between the connecting section of the condenser tube (1) and the large end connecting section (31) of the filter (3), the Lock ring (2) is then tightly fitted onto the outer circle of the large end connecting section (31) of the filter (3), so that a circumferential compression and overlapping seal is formed between the connecting section of the condenser tube (1) and the large end connecting section (31) of the filter (3). At the same time, the sealing liquid is pushed to the large end connecting limit part (32) of the filter (3) to form the first sealing liquid annular solidification layer (8).
5. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 2, wherein, The connecting section of the capillary tube (5) is inserted into the cavity of the small end connecting section (33) of the filter (3), abutting against the capillary connecting limiting part (51). After filling the gap between the capillary connecting section (52) and the small end connecting section (33) of the filter (3) with sealing liquid, the second Locke ring (4) is tightly fitted onto the outer circle of the small end connecting section (33) of the filter (3), so that a circumferential compression and overlapping seal is formed between the capillary connecting section (52) and the small end connecting section (33) of the filter (3). At the same time, the sealing liquid is pushed to the flared end of the small end connecting section (33) of the filter to form the second sealing liquid ring curing layer (9).
6. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 5, wherein, The first sealing liquid annular curing layer (8) and the second sealing liquid annular curing layer (9) are composed of anaerobic sealant.
7. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, The large end connection section (31) of the filter (3) is located between the Lock ring (2) and the condenser (1); The small end connection section (33) of the filter (3) is located between the second ring (4) and the capillary (5).
8. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, The large end connection section (31) of the filter (3) is connected to the condenser (1) through the Lock ring (2) to form the first compression section (311).
9. A lock ring for connecting filter with condenser and capillary in a refrigeration unit as claimed in claim 1, wherein, The small end connecting section (33) of the filter (3) and the capillary connecting section (52) are connected by tearing the second ring (4) to form a second compression section (334).