Filtering device and refrigeration appliance

Abstract

The utility model provides a kind of filtering device and refrigeration equipment, by setting the inner ring flanging and outer ring flanging for fixing and compacting it on the filtering assembly of filtering device, avoid the abnormal state such as electric switch valve "out of step" or capillary "dirty block" of the subsequent refrigeration component that small particles flow from the gap of other filtering assembly edge, make filtering device more safe and reliable, to improve the product quality of filtering device and the refrigeration equipment using the filtering 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, refrigeration systems in refrigeration equipment commonly use capillary tubes with an inner diameter of 0.6–0.7 mm as throttling devices. The two ends of the capillary tube are connected to a filter and an evaporator, respectively. Tiny impurities in the refrigerant flowing through the filter can easily accumulate and clog the capillary tube inlet, affecting the refrigerant flow rate. Electric switching valves are frequently used in refrigeration systems, but their permanent magnet rotors easily attract iron filings from the system, which can lead to valve core jamming with prolonged use. Single-layer steel pipes in refrigeration systems are prone to iron filings during pipe manufacturing, welding, and brazing processes, while gray cast iron components of the compressor also generate metal debris during processing and operation.

[0003] While filters in related technologies can intercept some impurities, the use of an interference fit between a standard iron filter mesh and a copper housing can easily generate copper shavings, and the filter mesh pore size cannot effectively intercept smaller particles. Although adding a magnetic ring to the filter improves the adsorption effect on ferromagnetic impurities, it still cannot effectively intercept non-ferromagnetic impurities such as copper and aluminum shavings. These tiny particles, carried by the refrigerant flow, may scratch the contact surfaces of the electric switching valve's switch plate and valve seat, causing internal leaks, loss of synchronization, and other malfunctions. Furthermore, the relatively large gaps between the molecular sieves inside the filter limit its filtration effect on tiny impurities, affecting the reliability of the refrigeration system. Utility Model Content

[0004] 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: A hollow cylindrical shell, the shell including a first end and a second end opposite thereto; A first filter assembly located inside the housing and near the second end, the first filter assembly being used to filter the fluid to be filtered flowing from the first end to the second end; The fixing structure includes a first fixing plate and a second fixing plate arranged perpendicular to the central axis of the housing, with the first filter assembly located between the first fixing plate and the second fixing plate. The first fixing plate and the second fixing plate each have a first opening area and a second opening area, which are used to allow fluid flowing through the first filter assembly to pass through. The fixing structure also includes a first fixing ring and a second fixing ring extending from the edges of the first fixing plate and the second fixing plate in a direction parallel to the central axis of the housing. The first fixing ring fits against the housing, and the second fixing ring fits against the first fixing ring. The fixing structure is used to fix the first filter assembly inside the housing.

[0005] In one possible implementation, the filtering device further includes a second filter assembly and a third filter assembly fixed to the inner wall of the housing; wherein the second filter assembly, the third filter assembly, and the first filter assembly are arranged sequentially from the first end to the second end.

[0006] In one possible implementation, the third filtration component comprises a solid molecular sieve.

[0007] In one possible implementation, the inner wall of the housing is provided with at least two annular limiting protrusions, which are in contact with the third fixing ring and the first fixing ring.

[0008] In one possible implementation, the first filter assembly includes a first filter section and a second filter section sequentially disposed from the first end to the second end; The first filter section includes cotton felt and / or non-woven fabric; the second filter section has a plurality of first through holes.

[0009] In one possible implementation, the second filter assembly includes a third filter section; wherein the third filter section has a plurality of second through holes, the diameter of the second through holes being larger than the diameter of the first through holes; And / or, the second filter assembly further includes a fourth filter section, the fourth filter section comprising cotton felt and / or nonwoven fabric; wherein the third filter section and the fourth filter section are arranged sequentially from the first end to the second end.

[0010] In one possible implementation, the first end includes a first connecting portion extending in the axial direction of the housing, the first connecting portion having a circular third opening, the center of the third opening being located on the axial direction of the housing, and the third opening having a second connecting portion extending parallel in a direction away from the housing. The second end has a third connecting portion extending in the axial direction of the housing, the third connecting portion having a circular fourth opening, the center of the fourth opening being located on the axial direction of the housing, and the fourth opening having a fourth connecting portion extending parallel in a direction away from the housing.

[0011] In one possible implementation, the filtering device further includes a third retaining ring extending from the edge of the third filter section in a direction parallel to the central axis of the housing and surrounding the third filter section, the third retaining ring being used to fix the third filter section.

[0012] In one possible implementation, the thickness of the first filter section is 1 mm to 5 mm in a direction parallel to the central axis of the housing.

[0013] Based on the same concept, this utility model also provides a refrigeration device, which includes the filtration device described in any of the foregoing claims, as well as a compressor, a condenser, an electric switching valve, a capillary tube, and an evaporator; The compressor, condenser, electric switching valve, capillary tube, and evaporator are used together to refrigerate the refrigeration equipment. The first and second ends of the filter device are connected to the condenser and the electric switching valve, respectively, to filter impurities and moisture from the refrigerant flowing through the compressor, condenser, electric switching valve, capillary tube, and evaporator.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a filtration device and a refrigeration equipment. By setting inner and outer flanges on the filter component of the filtration device for fixing and pressing it, it prevents small particles from flowing into the subsequent refrigeration components from the gaps at the edge of the filter component, which could cause abnormal conditions such as "loss of synchronization" of the electric switching valve or "clogging" of the capillary tube. This makes the filtration device safer and more reliable, thereby improving the product quality of the filtration device and the refrigeration equipment using this filtration device. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is one of the cross-sectional views of the filtration device provided in this embodiment; Figure 2This is a schematic diagram of the first fixing plate and the first fixing ring of the filter device provided in this embodiment; Figure 3 This is a schematic diagram of the second fixing plate and the second fixing ring of the filter device provided in this embodiment; Figure 4 This is the second cross-sectional view of the filtration device provided in this embodiment; Figure 5 A schematic diagram of the first filtering component provided in this embodiment; Figure 6 This is a schematic diagram of the second filtering component provided in this embodiment; Figure 7 This is a schematic diagram of the refrigeration system of the refrigeration equipment provided in this embodiment.

[0017] Icons: Filter device-10; Housing-100; First end-101; Second end-102; First filter assembly-210; First fixing plate-311; Second fixing plate-321; First fixing ring-312; Second fixing ring-322; Second filter assembly-220; Third filter assembly-230; First filter section-211; Second filter section-212; Third filter section-221; Second through hole-2211; Third fixing ring-2212; Thickness of the first filter section-H1; Electric switching valve-11; Condenser-12; Anti-condensation tube-13; Compressor-14; First evaporator-151; Second evaporator-152; First capillary tube-161; Second capillary tube-162. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The inventors' investigation revealed that current refrigeration systems in refrigeration equipment commonly use capillary tubes with an inner diameter of 0.6–0.7 mm as throttling devices. These capillary tubes are connected to a filter and an evaporator at their ends, respectively. Tiny impurities in the refrigerant flowing through the filter easily accumulate and clog the capillary tube inlet, affecting refrigerant flow. Electric switching valves are frequently used in refrigeration systems, but their permanent magnet rotors easily attract iron filings from the system, potentially causing the valve core to seize up over time. Furthermore, single-layer steel pipes in refrigeration systems are prone to iron filings during pipe manufacturing, welding, and brazing processes, while gray cast iron components of the compressor also generate metal debris during processing and operation.

[0026] While filters in related technologies can intercept some impurities, the use of an interference fit between a standard iron filter mesh and a copper housing can easily generate copper shavings, and the filter mesh pore size cannot effectively intercept smaller particles. Although adding a magnetic ring to the filter improves the adsorption effect on ferromagnetic impurities, it still cannot effectively intercept non-ferromagnetic impurities such as copper and aluminum shavings. These tiny particles, carried by the refrigerant flow, may scratch the contact surfaces of the electric switching valve's switch plate and valve seat, causing internal leaks, loss of synchronization, and other malfunctions. Furthermore, the relatively large gaps between the molecular sieves inside the filter limit its filtration effect on tiny impurities, affecting the reliability of the refrigeration system.

[0027] In view of this, the present invention provides a filtration device 10, please refer to [link / reference]. Figure 1 It is used in refrigeration equipment and includes a housing 100, a first filter assembly 210 and a fixed structure.

[0028] Alternatively, refrigeration equipment may include refrigerators or air conditioners.

[0029] The housing 100 is a hollow cylindrical shape, including a first end 101 and a second end 102 opposite thereto.

[0030] Optionally, in the refrigeration equipment, the first end 101 is used to connect to the condenser, and the second end 102 is used to connect to the electric switching valve. The refrigerant flows sequentially through the condenser, the filter device 10, the electric switching valve, the capillary tube, and the evaporator.

[0031] The first filter assembly 210 is located inside the housing 100 and close to the second end 102, and is used to filter the fluid to be filtered flowing from the first end 101 to the second end 102.

[0032] In this embodiment, the first filter component 210 is located near the second end 102, forming the final filtration position in the refrigerant circulation loop, thereby achieving the final purification treatment of the refrigerant in the entire loop.

[0033] Please see Figure 2 and Figure 3The fixing structure includes a first fixing piece 311 and a second fixing piece 321 arranged perpendicular to the central axis of the housing 100. The first filter assembly 210 is located between the first fixing piece 311 and the second fixing piece 321. The first fixing piece 311 and the second fixing piece 321 respectively have a first opening region 313 and a second opening region 323, which are used to allow fluid flowing through the first filter assembly 210 to pass through. The fixing structure also includes a first fixing ring 312 and a second fixing ring 322 extending from the edges of the first fixing piece 311 and the second fixing piece 321 in a direction parallel to the central axis of the housing 100. The first fixing ring 312 fits against the housing 100, and the second fixing ring 322 fits against the first fixing ring 312. The fixing structure is used to fix the first filter assembly 210 inside the housing 100.

[0034] In this embodiment, by providing a first fixing plate 311 and a second fixing plate 321 for fixing and pressing the filter components of the filter device 10, and a first fixing ring 312 and a second fixing ring 322 for fixing the first fixing plate 311, the second fixing plate 321 and the housing 10 relative to each other, it is possible to prevent small particles from flowing into subsequent refrigeration components from the gaps at the edges of other filter components or from clogging the capillary tube or affecting the function of the electric switching valve, making the filter device 10 safer and more reliable, thereby improving the product quality of the filter device 10 and the refrigeration equipment using this filter device 10.

[0035] In one possible implementation, please refer to Figure 4 The filtering device 10 further includes a second filter assembly 220 and a third filter assembly 230 fixed to the inner wall of the housing 100; wherein the second filter assembly 220, the third filter assembly 230, and the first filter assembly 210 are arranged sequentially from the first end 101 to the second end 102. Thus, by adjusting the filtration capabilities of the second filter assembly 220, the third filter assembly 230, and the first filter assembly 210 respectively, the filtering device 10 can achieve different filtration efficiencies. For example, the second filter assembly 220 can be used for initial screening of the refrigerant with large mesh openings, then the third filter assembly 230 can be used to adsorb moisture and large particulate impurities from the refrigerant, and finally the first filter assembly 210 can be used for fine impurities in the refrigerant to be filtered with small mesh openings.

[0036] In one possible implementation, the third filtration component 230 includes a solid molecular sieve.

[0037] Alternatively, the solid molecular sieve can be a spherical granular molecular sieve and / or a blocky molecular sieve.

[0038] Optionally, the third filter component 230 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, making it less prone to leaving debris. The sintered block molecular sieve is cylindrical and coaxial with the cylindrical shell 10, with a diameter slightly smaller than that of the cylindrical shell 10.

[0039] Optionally, the block molecular sieve 230 may also be provided with a conical hollow structure at one end near the second end 102, wherein the top of the conical hollow structure is far away from the second end 102. The third filter component 230 configured in this way can collect refrigerant, thereby increasing the flow of refrigerant.

[0040] Optionally, the material of the third filter component 230 is 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 and avoiding the adsorption of refrigerant. 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.

[0041] In one possible implementation, the inner wall of the housing 100 is provided with at least two annular limiting protrusions, which respectively fit with the third fixing ring 212 and the first fixing ring 312.

[0042] When installing the filter device 10 in this embodiment, in order to securely install the third fixing ring 212 and the first fixing ring 312 to the housing 100, the third fixing ring 212 and the first fixing ring 312 are respectively designed with an interference fit to the two annular limiting protrusions on the inner wall of the housing 100. In this way, the second filter assembly 220 and the first filter assembly 210 are firmly installed on the housing 100.

[0043] In one possible implementation, the inner wall of the housing 100 can be narrow in the middle and wide at both ends to fix the third filter assembly 230. At the same time, the debris generated by the pressing of the fixing structure during the installation of the filter device 10 is pushed towards the middle of the filter device 10, so as to prevent the debris from flowing with the refrigerant into the components behind the refrigeration equipment during the use of the filter device 10.

[0044] In one possible implementation, please refer to Figure 5 The first filter assembly 210 includes a first filter section 211 and a second filter section 212 arranged sequentially from the first end 101 to the second end 102.

[0045] The second filter section 212 can not only further filter the refrigerant, but also work with the fixing structure to prevent debris from falling from the first filter section 211 and the third filter assembly 230 along the refrigerant flow direction during installation from clogging the second end 102 of the filter device 10.

[0046] The first filter section 211 includes cotton felt and / or non-woven fabric.

[0047] Alternatively, the material of the cotton felt can be glass fiber or polyethylene terephthalate fiber, etc.

[0048] In this embodiment, cotton felt or non-woven fabric is used as the first filter section 211. The fibrous material can be used to filter large particulate impurities in the refrigerant by inertial mechanism, medium-sized particles by interception mechanism, and micro particles by diffusion and electrostatic mechanism, thereby improving the filtration effect.

[0049] The second filter section 212 has a plurality of first through holes.

[0050] In this embodiment, the second filter section 212 is a first through hole formed by a mesh woven from metal wires, which can be used to filter impurities that may remain in the refrigerant after it has been adsorbed by the third filter component 230.

[0051] Optionally, the metal mesh material of the second filter section 212 can be brass or stainless steel, etc.

[0052] It should be noted that, in addition to the materials mentioned above, the first filter section 211 and the second filter section 212 may also be made of other materials, which are not specifically limited here.

[0053] In one possible implementation, the second filter assembly 220 includes a third filter section 221; wherein the third filter section 221 has a plurality of second through holes 2211, the diameter of the second through holes 2211 being larger than the diameter of the first through holes.

[0054] In this embodiment, the diameter of the second through hole 2211 of the third filter section 221 is relatively large, which is used to intercept larger particulate impurities in the refrigerant before the refrigerant enters the third filter assembly 230, such as metal shavings left from welding in the refrigeration system or pipe oxide scale, etc., to prevent large particulate impurities in the refrigerant from clogging the pores of the third filter assembly 230 or wearing down the crystal structure, thereby protecting the third filter assembly 230 and improving the filtration efficiency.

[0055] In this embodiment, the diameter of the first through hole of the second filter section 212 is relatively small, which can be used to filter out the fine impurities that may remain in the refrigerant after it has been adsorbed by the third filter component 230, such as the tiny crystal fragments that fall off during the activation process of the third filter component 230 and the metal oxide particles generated during system operation, thereby preventing these fine particles from entering the subsequent components of the refrigeration system and causing blockage.

[0056] In this way, through multiple layers of filtration, refrigerant with fewer impurities can enter the components of the subsequent refrigeration system, thereby improving the lifespan of the refrigeration equipment.

[0057] And / or, the second filter assembly 220 further includes a fourth filter section, the fourth filter section comprising cotton felt and / or non-woven fabric; wherein, the third filter section 221 and the fourth filter section are arranged sequentially from the first end 101 to the second end 102.

[0058] In this embodiment, in order to further improve the filtration efficiency, a fourth filter section can be provided on the side of the third filter section 221 away from the first end 101. The fourth filter section uses cotton felt or non-woven fabric to filter large particulate impurities by utilizing the inertial mechanism of fibrous materials in the refrigerant, filter medium-sized particles by utilizing the interception mechanism, and filter micro particles by utilizing diffusion and electrostatic mechanisms, thereby improving the filtration capacity of the filter device 10.

[0059] In one possible implementation, please refer to Figure 1 The first end 101 includes a first connecting portion extending in the axial direction of the housing 100, the first connecting portion having a circular third opening, the center of the third opening being located on the axial direction of the housing 100, and the third opening having a second connecting portion extending parallel in a direction away from the housing 100.

[0060] In this embodiment, the second connecting part can be connected to the first connecting pipe, which is used to connect to the condenser.

[0061] The second end 102 has a third connecting portion extending in the axial direction of the housing 100. The third connecting portion has a circular fourth opening, the center of which is located on the axial direction of the housing 100. The fourth opening has a fourth connecting portion extending parallel to the direction away from the housing 100.

[0062] In this embodiment, the fourth connecting part can be connected to the second connecting pipe, which is used to connect to the electric switching valve.

[0063] In one possible implementation, please refer to Figure 6The filter device 10 further includes a third fixing ring 2212 extending from the edge of the third filter section 221 in a direction parallel to the central axis of the housing 100 and surrounding the third filter section 221, the third fixing ring 2212 being used to fix the third filter section 221.

[0064] In this embodiment, the third fixing ring 2212 can be fixed inside the housing 100 by means of integral design or bonding. In this way, the position of the third filter part 221 can be fixed, and it can cooperate with the fixing structure to a certain extent to fix the position of the third filter assembly 230. For example, if the third filter assembly 230 is a sintered block molecular sieve, when the sintered block molecular sieve as a whole moves closer to the first end 101, the third fixing ring 2212 can act as a limiting component of the third filter assembly 230 to prevent it from leaving the set position.

[0065] In one possible implementation, the thickness H1 of the first filter section 211 is 1 mm to 5 mm in a direction parallel to the central axis of the housing 100.

[0066] In this embodiment, the thickness H1 of the first filter section 211 is set to 1mm to 5mm, which ensures sufficient filtration efficiency while avoiding excessive flow resistance to the refrigerant. Specifically, when the thickness is less than 1mm, the filter material's ability to filter impurities is insufficient; while a thickness exceeding 5mm will lead to a significant increase in refrigerant flow pressure drop, affecting system energy efficiency. This design ensures effective interception of impurities without affecting the performance of the refrigeration system.

[0067] Based on the same concept, this utility model also provides a refrigeration device, which includes the filter device 10 described in any of the preceding claims, as well as a compressor 14, a condenser 12, an electric switching valve 11, a capillary tube, and an evaporator.

[0068] Please refer to Figure 7 , Figure 7 This is a schematic diagram of a refrigeration system for a refrigeration device provided in this embodiment. It includes at least an electric switching valve 11, a condenser 12, an anti-condensation pipe 13, a compressor 14, a first evaporator 151, a second evaporator 152, a first capillary tube 161, a second capillary tube 162, and a filter device 10. The arrows in the diagram indicate the direction of refrigerant flow.

[0069] The compressor 14, the condenser 12, the electric switching valve 11, the capillary tube, 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 respectively connected to the condenser 12 and the electric switching valve 11, and are used to filter impurities and moisture from the refrigerant flowing through the compressor 14, the condenser 12, the electric switching valve 11, the capillary tube, and the evaporator.

[0070] In this embodiment, since the refrigeration equipment includes a filter device 10 with good filtration performance, the risk of small particles flowing into the subsequent refrigeration components from the gaps at the edges of multiple filter components, resulting in abnormal conditions such as the electric switching valve 11 "losing steps" or the capillary tube "clogging", is reduced. Therefore, the refrigeration performance of the entire refrigeration system can be improved, thereby improving the refrigeration effect of the refrigeration equipment.

[0071] In addition, the filter device 10 may also include a first connecting pipe, the two ends of which are respectively connected to the first end 101 of the filter device 10 and the condenser.

[0072] In summary, this utility model provides a filtration device 10 and a refrigeration device. By setting inner and outer flanges on the filter components of the filtration device 10 for fixing and pressing them, it prevents small particles from flowing into the subsequent refrigeration components from the gaps at the edge of the filter components, thus avoiding abnormal states such as "loss of synchronization" of the electric switching valve or "clogging" of the capillary tube. This makes the filtration device 10 safer and more reliable, thereby improving the product quality of the filtration device 10 and the refrigeration device using this filtration device 10.

[0073] 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.

[0074] 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; A first filter assembly located inside the housing and near the second end, the first filter assembly being used to filter the fluid to be filtered flowing from the first end to the second end; The fixing structure includes a first fixing plate and a second fixing plate arranged perpendicular to the central axis of the housing, with the first filter assembly located between the first fixing plate and the second fixing plate. The first fixing plate and the second fixing plate each have a first opening area and a second opening area, which are used to allow fluid flowing through the first filter assembly to pass through. The fixing structure also includes a first fixing ring and a second fixing ring extending from the edges of the first fixing plate and the second fixing plate in a direction parallel to the central axis of the housing. The first fixing ring fits against the housing, and the second fixing ring fits against the first fixing ring. The fixing structure is used to fix the first filter assembly inside the housing.

2. The filtration device according to claim 1, characterized in that, The filtration device further includes a second filter assembly and a third filter assembly fixed to the inner wall of the housing; wherein the second filter assembly, the third filter assembly and the first filter assembly are arranged sequentially from the first end to the second end.

3. The filtration device according to claim 2, characterized in that, The third filtration component includes a solid molecular sieve.

4. The filtration device according to claim 2, characterized in that, The first filter assembly includes a first filter section and a second filter section arranged sequentially from the first end to the second end; The first filter section includes cotton felt and / or non-woven fabric; the second filter section has a plurality of first through holes.

5. The filtration device according to claim 4, characterized in that, The second filter assembly includes a third filter section; wherein the third filter section has a plurality of second through holes, the diameter of the second through holes being larger than the diameter of the first through holes; And / or, the second filter assembly further includes a fourth filter section, the fourth filter section comprising cotton felt and / or nonwoven fabric; wherein the third filter section and the fourth filter section are arranged sequentially from the first end to the second end.

6. The filtration device according to claim 1, characterized in that, The first end includes a first connecting portion extending in the axial direction of the housing, the first connecting portion having a circular third opening, the center of the third opening being located on the axial direction of the housing, and a second connecting portion extending parallel in a direction away from the housing at the third opening; The second end has a third connecting portion extending in the axial direction of the housing, the third connecting portion having a circular fourth opening, the center of the fourth opening being located on the axial direction of the housing, and the fourth opening having a fourth connecting portion extending parallel in a direction away from the housing.

7. The filtration device according to claim 5, characterized in that, The filtration device further includes a third fixing ring extending from the edge of the third filter section in a direction parallel to the central axis of the housing and surrounding the third filter section, the third fixing ring being used to fix the third filter section.

8. The filtration device according to claim 7, characterized in that, The inner wall of the housing is provided with at least two annular limiting protrusions, which are respectively attached to the third fixing ring and the first fixing ring.

9. The filtration device according to claim 4, characterized in that, In a direction parallel to the central axis of the housing, the thickness of the first filter section is 1 mm to 5 mm.

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, an electric switching valve, a capillary tube, and an evaporator; The compressor, condenser, electric switching valve, capillary tube, and evaporator are used together to refrigerate the refrigeration equipment. The first and second ends of the filter device are connected to the condenser and the electric switching valve, respectively, to filter impurities and moisture from the refrigerant flowing through the compressor, condenser, electric switching valve, capillary tube, and evaporator.

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