Filtering device and refrigeration appliance

Abstract

This utility model provides a filtration device and a refrigeration equipment. By using flameless connection and sealant instead of flame brazing in the filtration device, the connection difficulty between the second and fourth connection parts and the first and second connection pipes is reduced, the weld leakage rate is reduced, the connection quality and the sealing performance of the filtration device are improved, and the device is safer and more reliable, thereby improving the product quality of the filtration device and the refrigeration equipment using this filtration device.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and more specifically, to a filtration device and refrigeration equipment. Background Technology

[0002] Currently, there is a problem of refrigerant leakage in the compressor system of refrigeration equipment, especially at the upper and lower ends of the filter where it is flame-brazed with steel pipes and capillary tubes, respectively. Leakage is prone to occur at the flame-brazed weld points.

[0003] In related technologies, the filter housing is typically made of copper, and the upper end of the filter is welded to the steel pipe using a high-silver solder joint. However, welding between different materials is difficult, involves high stress, is prone to rebound, has poor solder penetration, and is susceptible to incomplete welds. Furthermore, the flux in the high-silver solder easily corrodes the copper housing after deliquescence. The main reason for leakage at the flame-brazed joint between the lower end of the filter and the capillary tube is that this joint is an "inverted weld," and the lower end of the filter has a thicker wall after narrowing, making flame brazing with the slender, thin-walled capillary tube difficult. This results in the joint being prone to overheating, breakage, or incomplete weld leakage.

[0004] In addition, flame brazing requires extremely high welding skills, and the welding quality depends on the operator's welding level. Utility Model Content

[0005] In order to at least overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a filtration device for use in refrigeration equipment, comprising:

[0006] A hollow cylindrical shell, the shell including a first end and a second end opposite thereto;

[0007] The first end has a first connecting portion extending in the axial direction of the housing. The first connecting portion has a circular first opening, the center of which is located on the axial direction of the housing. The first opening has a second connecting portion extending parallel to the housing in a direction away from the housing. The second connecting portion includes at least one first annular protrusion on the side near the axial direction of the housing. The first annular protrusion is used to fix a first connecting tube connected to the housing via the second connecting portion. The first connecting tube is at least partially located within the second connecting portion, and a sealant is provided between the first connecting tube and the second connecting portion.

[0008] The second end has a third connecting portion extending in the axial direction of the housing, the third connecting portion having a circular second opening, the center of the second opening being located on the axial direction of the housing, and a fourth connecting portion extending parallel in a direction away from the housing, the fourth connecting portion being used to fix the second connecting tube to the housing, the second connecting tube including at least one second annular protrusion on the side near the fourth connecting portion; wherein, the second connecting tube is at least partially located within the fourth connecting portion, and a sealant is provided between the second connecting tube and the fourth connecting portion;

[0009] A filter assembly located within the housing.

[0010] In one possible implementation, the first connecting pipe comprises a galvanized steel pipe;

[0011] The first connecting pipe is used to connect to the condenser of the refrigeration equipment.

[0012] In one possible implementation, the second connecting tube includes a capillary tube;

[0013] The second connecting pipe is used to connect to the evaporator of the refrigeration equipment.

[0014] In one possible implementation, the filtration assembly includes a first filtration structure, a molecular sieve, and a second filtration structure arranged sequentially in a direction away from the first end.

[0015] In one possible implementation, the molecular sieve includes a granular molecular sieve or a sintered block molecular sieve.

[0016] In one possible implementation, the molecular sieve material comprises aluminosilicate.

[0017] In one possible implementation, the first filter structure includes a first filter screen and a first retaining ring disposed around the first filter screen, the first retaining ring being fixedly connected to the housing.

[0018] In one possible implementation, the second filter structure includes a second filter screen and a second fixing ring disposed around the second filter screen, the second fixing ring being fixedly connected inside the housing;

[0019] The mesh density of the second filter is greater than that of the first filter.

[0020] In one possible implementation, the materials of the housing, the first connecting portion, the second connecting portion, the third connecting portion, and the fourth connecting portion include aluminum.

[0021] Based on the same concept, this utility model also provides a refrigeration device, which includes any of the aforementioned filtration devices, as well as a compressor, a condenser, and an evaporator;

[0022] The compressor, the condenser, and the evaporator work together to cool the refrigeration equipment. The first and second ends of the filter device are connected to the condenser and the evaporator, respectively, and are used to filter impurities and moisture from the refrigerant flowing through the compressor, the condenser, and the evaporator.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention reduces the difficulty of connecting the second and fourth connecting parts to the first and second connecting pipes respectively by using flameless connections and sealant instead of flame brazing in the filter device. This reduces the weld leakage rate, improves the connection quality and the sealing performance of the filter device, making it safer and more reliable, thereby improving the product quality of the filter device and the refrigeration equipment using this filter device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is one of the cross-sectional views of the filtration device provided in this embodiment;

[0027] Figure 2 This is one of the enlarged schematic diagrams of the filtration device provided in this embodiment;

[0028] Figure 3 This is a second partially enlarged schematic diagram of the filtration device provided in this embodiment;

[0029] Figure 4 This is the second cross-sectional view of the filtration device provided in this embodiment;

[0030] Figure 5 This is the third cross-sectional view of the filtration device provided in this embodiment.

[0031] Icons: Filter device-10; Housing-100; First end-101; Second end-102; First connecting part-110; Second connecting part-120; First annular protrusion-121; First connecting pipe-310; Third connecting part-130; Fourth connecting part-140; Second annular protrusion-321; Filter assembly-200; First filter structure-210; Molecular sieve-220; Second filter structure-230; Second connecting pipe-320; Third connecting pipe-330; Sealant-400. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0038] It should be noted that, where there is no conflict, different features in the embodiments of this utility model can be combined with each other.

[0039] The inventor's investigation revealed that there is a refrigerant leakage problem in the compressor system of refrigeration equipment, especially at the flame brazing points where the upper and lower ends of the filter are respectively connected to the steel pipe and capillary tube, where leakage is prone to occur.

[0040] In related technologies, the filter housing is typically made of copper, and the upper end of the filter is welded to the steel pipe using a high-silver solder joint. However, welding between different materials is difficult, involves high stress, is prone to rebound, has poor solder penetration, and is susceptible to incomplete welds. Furthermore, the flux in the high-silver solder easily corrodes the copper housing after deliquescence. The main reason for leakage at the flame-brazed joint between the lower end of the filter and the capillary tube is that this joint is an "inverted weld," and the lower end of the filter has a thicker wall after narrowing, making flame brazing with the slender, thin-walled capillary tube difficult. This results in the joint being prone to overheating, breakage, or incomplete weld leakage.

[0041] Specifically, at the lower end of the filter, because the filter of the refrigeration equipment needs to be filled with molecular sieves, its cylindrical shell has a relatively large outer diameter and a large wall thickness; while the capillary tube has an extremely small outer diameter and a very small wall thickness. The part at the lower end of the filter that matches the capillary tube has a constricted structure, and the metal constriction during welding will increase the wall thickness. When flame brazing is performed on workpieces with two such large differences in wall thickness, the workpiece with a larger wall thickness and larger external dimensions—the cylindrical shell—has a slow temperature rise and is prone to forming a "false weld." The capillary tube workpiece with a thinner wall and smaller external dimensions has a fast temperature rise and is prone to "overheating," which can lead to capillary tube breakage and leakage at the weld point. Moreover, this weld point is a "reverse welding" welding method, where the solder only penetrates into the pipe gap through capillary action. The solder penetration is insufficient, resulting in a false weld and ultimately causing refrigerant leakage.

[0042] In addition, flame brazing requires extremely high welding skills, and the welding quality depends on the operator's welding level.

[0043] In view of this, please refer to Figure 1 This utility model provides a filtration device 10, which is applied to refrigeration equipment and includes the following components.

[0044] A hollow cylindrical shell 100 includes a first end 101 and a second end 102 opposite thereto.

[0045] Please refer to Figure 1 and Figure 2 The first end 101 has a first connecting portion 110 extending in the axial direction of the housing 100. The first connecting portion 110 has a circular first opening, the center of which is located on the axial direction of the housing 100. The first opening has a second connecting portion 120 extending parallel to the housing 100 in a direction away from the housing 100. The second connecting portion 120 includes at least one first annular protrusion 121 on the side near the axial direction of the housing 100. The first annular protrusion 121 is used to fix a first connecting tube 310 connected to the housing 100 via the second connecting portion 120. The first connecting tube 310 is at least partially located within the second connecting portion 120. A sealant 400 is provided between the first connecting tube 310 and the second connecting portion 120.

[0046] Please refer to Figure 1 and Figure 3 The second end 102 has a third connecting portion 130 extending in the axial direction of the housing 100. The third connecting portion 130 has a circular second opening, the center of which is located on the axial direction of the housing 100. The second opening has a fourth connecting portion 140 extending parallel to the housing 100 in a direction away from the housing 100. The fourth connecting portion 140 is used to fix the second connecting tube 320 to the housing 100. The second connecting tube 320 includes at least one second annular protrusion 321 on the side near the fourth connecting portion 140. The second connecting tube 320 is at least partially located within the fourth connecting portion 140. A sealant 400 is provided between the second connecting tube 320 and the fourth connecting portion 140.

[0047] A filter assembly 200 is located within the housing 100. The position of the filter assembly 200 can be adjusted as needed to improve the filtration quality of the filter device 10.

[0048] In this embodiment, the first annular protrusion 121 is press-fitted with the first connecting tube 310. External force is used to press the first connecting tube 310 into the first annular protrusion 121, thereby achieving a fixed connection between the second connecting part 120 and the first connecting tube 310. Similarly, the second annular protrusion 321 on the second connecting tube 320 is press-fitted with the fourth connecting part 140. External force is used to press the annular protrusion on the second connecting tube 320 into the fourth connecting part 140, thereby achieving a fixed connection between the fourth connecting part 140 and the second connecting tube 320. Furthermore, sealant 400 is filled between the first connecting tube 310 and the second connecting part 120, and between the second connecting tube 320 and the fourth connecting part 140, to achieve a seal for the filter device 10. This embodiment replaces flame brazing with flameless connection and sealant 400, reducing the connection difficulty between the second connection part 120 and the fourth connection part 140 and the first connection pipe 310 and the second connection pipe 320 respectively, reducing the weld leakage rate, improving the connection quality and the sealing performance of the filter device 10, making it safer and more reliable, thereby improving the product quality of the filter device 10 and the refrigeration equipment using this filter device 10.

[0049] It should be noted that the connection methods for the first connecting pipe 310 and the second connecting pipe 320 with different inner diameters can be interchanged. For example, if the inner diameter and wall thickness of the first connecting pipe 310 are smaller, the annular protrusion can be set on the outer wall of the first connecting pipe 310; if the inner diameter and wall thickness of the second connecting pipe 320 are larger, the annular protrusion can be set on the inner wall of the fourth connecting part 140. The method can be flexibly changed according to the different application scenarios of the filter ring.

[0050] In this embodiment, the refrigeration equipment includes refrigerators or air conditioners, etc.

[0051] In one possible implementation, the first connecting pipe 310 comprises a galvanized steel pipe.

[0052] In this embodiment, the first connecting pipe 310 is made of galvanized steel. When the refrigerant flows through the galvanized steel pipe, the zinc coating on the surface of the galvanized steel pipe can form an electrochemical protective barrier. The zinc layer preferentially undergoes an oxidation reaction, preventing the steel pipe from corroding. Especially during the operation of the refrigeration system, condensate or trace amounts of moisture may occur. Using galvanized steel pipe can prevent impurities caused by rust on the inner wall of the pipe from falling off and clogging the filter device 10.

[0053] The first connecting pipe 310 is used to connect to the condenser of the refrigeration equipment. In this way, the refrigerant liquefied by the condenser can enter the filter device 10 to filter out impurities generated during the circulation.

[0054] In one possible implementation, the second connecting tube 320 includes a capillary.

[0055] The second connecting pipe 320 is used to connect to the evaporator of the refrigeration equipment.

[0056] In this embodiment, the second end 102 of the filter device 10 is connected to the evaporator through a capillary tube. The capillary tube can throttle and reduce the pressure of the refrigerant. After the high-pressure liquid refrigerant is throttled and reduced in pressure, it vaporizes in the evaporator, thereby absorbing the internal heat of the refrigerator to achieve cooling.

[0057] In one possible implementation, please refer to Figure 4 The filter assembly 200 includes a first filter structure 210, a molecular sieve 220, and a second filter structure 230 arranged sequentially in a direction away from the first end 101. This improves the filtration quality of the filter device 10.

[0058] In one possible implementation, the molecular sieve 220 comprises a granular molecular sieve or a sintered block molecular sieve.

[0059] In this embodiment, the molecular sieve 220 is a solid molecular sieve 220. Compared with other types of molecular sieves 220, solid molecular sieves 220 have higher mechanical strength, require no additional structural support during installation, have no risk of powder leakage, and are easy to maintain.

[0060] For example, molecular sieve 220 can be a sintered block molecular sieve. The sintered block molecular sieve has a dense and uniform structure, good connectivity between pores, and high crystal structure stability after high-temperature sintering, and can be reused; specifically, the sintered block molecular sieve is cylindrical and coaxial with the cylindrical shell, with a diameter slightly smaller than the cylindrical shell.

[0061] For example, molecular sieve 220 can also use granular molecular sieves. Granular molecular sieves consist of multiple independent particles, and the pores formed when they are stacked are adjustable. The resistance of the fluid can be controlled according to the filtration requirements. At the same time, when replacing them, some particles can be added or replaced individually, resulting in low maintenance costs. Specifically, for the shell 100 with a diameter of 18.9-25.0 mm, the particle diameter of the granular molecular sieve is 1.6-2.5 mm.

[0062] In one possible implementation, the molecular sieve 220 is made of aluminosilicate.

[0063] In this embodiment, the molecular sieve 220 is made of aluminosilicate. In the crystal structure of aluminosilicate, the silicon-oxygen tetrahedra and aluminum-oxygen tetrahedra form regular channels by sharing oxygen atoms. Therefore, the pore size can be controlled by adjusting the silicon-to-aluminum ratio, thereby ensuring the efficient adsorption of water molecules by the molecular sieve 220 and avoiding the adsorption of refrigerants. Simultaneously, aluminosilicates have good chemical stability and are not prone to chemical reactions even in refrigerants containing fluorine or hydrogen, avoiding impurities generated due to reactions. Furthermore, aluminosilicate raw materials are widely available and inexpensive, which can reduce the production cost of refrigeration equipment.

[0064] In one possible implementation, the first filter structure 210 includes a first filter screen and a first fixing ring disposed around the first filter screen, the first fixing ring being fixedly connected to the housing 100.

[0065] In this embodiment, the mesh density of the first filter screen is relatively small, which is used to pre-intercept larger particulate impurities in the refrigerant before the refrigerant enters the molecular sieve 220, such as metal shavings left from welding in the refrigeration system or oxide scale on the pipes, so as to avoid large particulate impurities in the refrigerant clogging the pores of the molecular sieve 220 or wearing down the crystal structure, thereby protecting the molecular sieve 220 and improving the filtration efficiency.

[0066] In this embodiment, the first fixing ring can be fixed inside the housing 100 by means of integral design or bonding. In this way, the position of the first filter screen can be fixed and the position of the molecular sieve 220 can be fixed to a certain extent. For example, if the molecular sieve 220 is a sintered block molecular sieve, when the sintered block molecular sieve as a whole moves closer to the first end 101, it can act as a limiting component of the molecular sieve 220 to prevent the molecular sieve 220 from leaving the set position.

[0067] In one possible implementation, the second filter structure 230 includes a second filter screen and a second fixing ring disposed around the second filter screen, the second fixing ring being fixedly connected to the housing 100.

[0068] In this embodiment, the second filter screen has a relatively large mesh density, which is used to filter out the fine impurities that may remain in the refrigerant after it has been adsorbed by the molecular sieve 220, such as tiny crystal fragments that fall off during the activation of the molecular sieve 220 and metal oxide particles generated during system operation, thereby preventing these fine particles from entering components such as the second connecting pipe 320 with a very small diameter and causing blockage.

[0069] In this embodiment, the second fixing ring can be fixed inside the housing 100 by means of integral design or bonding, thereby fixing the position of the second filter screen and, to a certain extent, fixing the position of the molecular sieve 220. Specifically, the first fixing ring and the second fixing ring together define the position of the molecular sieve 220, serving as the upper limit component and lower limit component of the molecular sieve 220, respectively, preventing the molecular sieve 220 from displacing close to or away from the first end 101.

[0070] The mesh density of the second filter is greater than that of the first filter.

[0071] Thus, by setting the first filter screen to a small-density mesh structure for preliminary filtration and the second filter screen to a large-density mesh structure for fine filtration, the small-density mesh reduces refrigerant flow resistance and intercepts large particulate impurities, while the large-density mesh achieves final fine filtration, preventing impurities in the refrigerant from damaging the refrigeration system and thereby improving the performance of the filter device 10 and the refrigeration equipment.

[0072] In one possible implementation, the housing 100, the first connecting portion 110, the second connecting portion 120, the third connecting portion 130, and the fourth connecting portion 140 are made of aluminum. Furthermore, the first filter screen, the first retaining ring, the second filter screen, and the second retaining ring are also made of aluminum.

[0073] In this embodiment, all components of the filter device 10 except for the molecular sieve 220 are made of aluminum. This reduces the overall weight of the filter device 10 due to aluminum's low density, thus reducing the overall weight of the refrigeration equipment and facilitating installation and transportation. Simultaneously, it allows for integrated design and manufacturing of the filter device 10, improving production efficiency and reducing production costs. Furthermore, aluminum has excellent corrosion resistance; its passivation film reduces the possibility of rust in refrigerants, extending the service life of the filter device 10 compared to copper tubes. Aluminum also exhibits good compatibility with the molecular sieve 220 and common refrigerants, preventing chemical reactions that could affect the filtration effect.

[0074] It should be noted that in other implementations of this embodiment, the filter device 10 may also be made of other materials, which are not specifically limited here.

[0075] Based on the same concept, this utility model also provides a refrigeration device, which includes any of the aforementioned filtration devices 10, as well as a compressor, a condenser and an evaporator.

[0076] The compressor, the condenser, and the evaporator are used together to refrigerate the refrigeration equipment. The first end 101 and the second end 102 of the filter device 10 are connected to the condenser and the evaporator, respectively, and are used to filter impurities and moisture from the refrigerant flowing through the compressor, the condenser, and the evaporator.

[0077] The refrigeration system of the refrigeration equipment includes a compressor, a condenser, an evaporator, and a filter device 10. These components work together to achieve the refrigeration effect. The compressor compresses the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure gas, providing power for the circulation. The condenser liquefies the high-temperature, high-pressure refrigerant gas, releasing heat to the outside. The filter device 10, located between the condenser and the evaporator, purifies the refrigerant. It filters impurities, adsorbs moisture and acidic substances through the filter screen and desiccant of the filter assembly 200. Simultaneously, the second end 102 of the filter device 10 is connected to the evaporator via a capillary tube, which throttles and reduces the pressure of the refrigerant. After throttling and reducing pressure, the high-pressure liquid refrigerant vaporizes in the evaporator, absorbing heat from the refrigerator's interior to achieve cooling. This cycle repeats continuously, ultimately transferring heat from the inside of the refrigeration equipment to the outside, maintaining a low-temperature environment inside the equipment.

[0078] In this embodiment, the use of a filter device 10 with better filtration performance can improve the refrigeration performance of the entire refrigeration system and enhance the refrigeration effect of the refrigeration equipment.

[0079] In one possible implementation, please refer to Figure 5 In the direction perpendicular to the first opening, the housing of the filter device 10 also has a third opening, the position of which does not coincide with the orthographic projection of the filter assembly 200 on the housing; the third opening is used to connect to the first port of the third connecting pipe 330.

[0080] The second port of the third connecting pipe 330 is used to connect to the compressor.

[0081] In this embodiment, the third connecting pipe 330 is a vacuum process pipe. The first and second ports of the third connecting pipe 330 are connected to the filter device 10 and the compressor, respectively. The compressor's suction and discharge functions can be used to assist in vacuuming or refrigerant delivery. Since the filter device 10 is located on the circulation path between the condenser and evaporator in the refrigeration system of the refrigeration equipment, connecting the first port of the third connecting pipe 330 to it ensures that air and moisture in the refrigeration system are thoroughly removed during vacuuming before charging the compressor with refrigerant filtered by the filter device 10. Simultaneously, the circulation path of the refrigeration system in the refrigeration equipment is compressor → condenser → filter device 10 → evaporator → compressor. The connection of the third connecting pipe 330 between the compressor and the filter device 10 can cover both the high-pressure and low-pressure sides of the refrigeration system, providing a vacuum throughout the entire refrigeration process, thereby preventing residual gas from affecting the cooling effect. Furthermore, since the compressor and filter device 10 are located close to each other, shortening the length of the third connecting pipe 330 can reduce the risk of leakage.

[0082] The material of the third connecting pipe 330 includes aluminum.

[0083] In summary, this utility model provides a filter device 10 and a refrigeration device. By using a first annular protrusion 121 to interfere with the first connecting pipe 310, and a second annular protrusion 321 on the second connecting pipe 320 to interfere with the fourth connecting part 140, the use of flameless connection and sealant 400 to replace flame brazing reduces the connection difficulty between the second connecting part 120 and the fourth connecting part 140 and the first connecting pipe 310 and the second connecting pipe 320 respectively, reduces the weld leakage rate, improves the connection quality and the sealing performance of the filter device 10, and makes it safer and more reliable, thereby improving the product quality of the filter device 10 and the refrigeration device using this filter device 10.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0085] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filtration device, applied to refrigeration equipment, characterized in that, include: A hollow cylindrical shell, the shell including a first end and a second end opposite thereto; The first end has a first connecting portion extending in the axial direction of the housing. The first connecting portion has a circular first opening, the center of which is located on the axial direction of the housing. The first opening has a second connecting portion extending parallel to the housing in a direction away from the housing. The second connecting portion includes at least one first annular protrusion on the side near the axial direction of the housing. The first annular protrusion is used to fix a first connecting tube connected to the housing via the second connecting portion. The first connecting tube is at least partially located within the second connecting portion, and a sealant is provided between the first connecting tube and the second connecting portion. The second end has a third connecting portion extending in the axial direction of the housing, the third connecting portion having a circular second opening, the center of the second opening being located on the axial direction of the housing, and a fourth connecting portion extending parallel in a direction away from the housing, the fourth connecting portion being used to fix the second connecting tube to the housing, the second connecting tube including at least one second annular protrusion on the side near the fourth connecting portion; wherein, the second connecting tube is at least partially located within the fourth connecting portion, and a sealant is provided between the second connecting tube and the fourth connecting portion; A filter assembly located within the housing.

2. The filtration device according to claim 1, characterized in that, The first connecting pipe includes a galvanized steel pipe; The first connecting pipe is used to connect to the condenser of the refrigeration equipment.

3. The filtration device according to claim 2, characterized in that, The second connecting tube includes a capillary tube; The second connecting pipe is used to connect to the evaporator of the refrigeration equipment.

4. The filtration device according to claim 1, characterized in that, The filtration assembly includes a first filtration structure, a molecular sieve, and a second filtration structure arranged sequentially in a direction away from the first end.

5. The filtration device according to claim 4, characterized in that, The molecular sieve includes granular molecular sieves or sintered block molecular sieves.

6. The filtration device according to claim 5, characterized in that, The molecular sieve material includes aluminosilicates.

7. The filtration device according to claim 4, characterized in that, The first filter structure includes a first filter screen and a first fixing ring disposed around the first filter screen, the first fixing ring being fixedly connected inside the housing.

8. The filtration device according to claim 7, characterized in that, The second filter structure includes a second filter screen and a second fixing ring disposed around the second filter screen, the second fixing ring being fixedly connected inside the housing; The mesh density of the second filter is greater than that of the first filter.

9. The filtration device according to claim 1, characterized in that, The materials of the housing, the first connecting part, the second connecting part, the third connecting part, and the fourth connecting part include aluminum.

10. A refrigeration device, characterized in that, The refrigeration equipment includes the filtration device as described in any one of claims 1-9, as well as a compressor, a condenser, and an evaporator; The compressor, the condenser, and the evaporator work together to cool the refrigeration equipment. The first and second ends of the filter device are connected to the condenser and the evaporator, respectively, and are used to filter impurities and moisture from the refrigerant flowing through the compressor, the condenser, and the evaporator.

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