Dry filter and equipment provided with same

Abstract

The invention discloses a dry filter and equipment provided with the dry filter, the dry filter comprises a shell, a sealing cover and a stopping piece, the shell comprises a cylindrical part and an end cover part, the end cover part is located at one axial end of the cylindrical part, the sealing cover is detachably assembled at the other axial end of the cylindrical part, the dry filter is provided with an inner cavity, and the stopping piece is arranged in the inner cavity. The stop piece is positioned in the inner cavity and is in limiting connection with the cylindrical part; the drying and filtering device further comprises a drying and filtering unit which is detachably assembled in the inner cavity, one end of the drying and filtering unit directly or indirectly abuts against the end cover part in the axial direction of the cylindrical part, and the other end of the drying and filtering unit directly or indirectly abuts against the stop piece. The dry filter can be detached, damaged parts in the dry filter can be conveniently replaced and maintained, the dry filter does not need to be wholly replaced, and the cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of drying and filtering, and in particular to a drying filter and equipment equipped with the drying filter. Background Art

[0002] Filter driers, commonly found in air conditioning systems, dry and filter the circulating refrigerant, effectively removing impurities such as moisture and particulate matter. If the filter drier becomes clogged, the entire filter drier must be replaced, which is costly. Summary of the Invention

[0003] The object of the present invention is to provide a drying filter and equipment equipped with the drying filter, wherein the drying filter can be disassembled, and damaged parts therein can be easily replaced and maintained without replacing the entire drying filter, which is conducive to reducing costs.

[0004] In order to solve the above technical problems, the present invention provides a drying filter, including a shell, a cover and a stopper, the shell including a cylindrical portion and an end cover portion, the end cover portion is located at one axial end of the cylindrical portion, the cover is detachably assembled to the other axial end of the cylindrical portion, the drying filter is provided with an inner cavity, the stopper is located in the inner cavity and is limit-connected to the cylindrical portion; and the drying filter unit is also included, the drying filter unit is detachably assembled in the inner cavity, along the axial direction of the cylindrical portion, one end of the drying filter unit is directly or indirectly against the end cover portion, and the other end is directly or indirectly against the stopper.

[0005] In an embodiment of the present invention, the cover, the stopper, the filter drying unit and the housing are all detachably assembled, and the filter drying unit can be conveniently and completely disassembled so that faulty components therein can be replaced or maintained without replacing the entire filter drying unit, which is beneficial to reducing usage costs.

[0006] The present invention also provides a device, including a device body and a drying filter, the device body is provided with a accommodating cavity, the drying filter is detachably assembled in the accommodating cavity, the device body is also provided with an inlet channel and an outlet channel, the inlet channel and the outlet channel are both connected to the accommodating cavity, and the drying filter is the above-mentioned drying filter.

[0007] The device provided by the present invention includes a drying filter, and the drying filter includes a cover, a stopper, a drying filter unit and a shell, which are all detachably assembled. The drying filter can be easily and completely disassembled to replace or maintain faulty components therein without replacing the entire drying filter, which is beneficial to reducing usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural diagram of an implementation of the drying filter provided by the present invention;

[0009] Figure 2 for Figure 1 Left view of;

[0010] Figure 3 for Figure 1 sectional view of

[0011] Figure 4 A structural diagram of a method for implementing the capping;

[0012] Figure 5 for Figure 4 sectional view of

[0013] Figure 6 for Figure 4 Schematic diagram of the structure of the middle cover and the cylinder;

[0014] Figure 7 A structural diagram of another implementation method of the capping;

[0015] Figure 8 A structural diagram of another implementation method of the capping;

[0016] Figure 9 An exploded view of the dry filter unit and the positioning unit;

[0017] Figure 10 A cross-sectional view of a stop member;

[0018] Figure 11 for Figure 10 a bottom view of the stopper;

[0019] Figure 12 This is a simplified structural diagram of the device provided by the present invention and equipped with a drying filter.

[0020] The following are the descriptions of the reference numerals:

[0021] 100 filter drier, 110 housing, 111 cylindrical portion, 111a first annular groove, 111b outlet hole, 112 end cover portion, 112a inlet hole, 113 inner cavity, 113a filter drier chamber, 113b positioning chamber, 114 abutting top portion, 114a abutting element, 120 filter drier unit, 121 adsorption component, 121a mounting plate, 121a-1 mounting shaft portion, 121a-2 spiral plate portion, 121b adsorbent, 122 filter element, 130 positioning unit, 131 stopper, 131a bottom plate portion, 131a-1 through hole, 131b outer cylindrical portion, 131b-1 splitting slit, 132 elastic component, 140 sealing cover, 141 clamping strip, 141a clamping block, 142a second annular groove, 150 first sealing component, 160 second sealing component;

[0022] 200 device body, 210 accommodating chamber, 220 working chamber, 230 inlet channel, 240 outlet channel, 250 retaining spring. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0026] In the description of the embodiments of the present invention, the term "plurality" refers to two or more than two. Moreover, when "plurality" is used to indicate the number of different components, it does not indicate the relationship between the quantities of these components.

[0027] In the description of the embodiments of the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0028] Please refer to Figures 1-11 , Figure 1 This is a structural diagram of an implementation of the drying filter provided by the present invention. Figure 2 for Figure 1 Left view of Figure 3 for Figure 1 A cross-sectional view of Figure 4 A structural diagram of a capping method is shown in FIG. Figure 5 for Figure 4 A cross-sectional view of Figure 6 for Figure 4 Schematic diagram of the structure of the middle cover and cylinder, Figure 7 A structural diagram of another implementation method of the capping method is shown in FIG. Figure 8 This is a structural diagram of another implementation method of the capping. Figure 9 This is an exploded view of the dry filter unit and positioning unit. Figure 10 A cross-sectional view of the stopper, Figure 11 for Figure 10 Bottom view of the stopper.

[0029] like Figure 1-Figure 3 As shown, the present invention provides a drying filter 100 , which includes a housing 110 , a drying filter unit 120 , a positioning unit 130 and a cover 140 .

[0030] The housing 110 is the structural component of the filter drier 100. In this embodiment of the present invention, the housing 110 includes a cylindrical portion 111 and an end cap portion 112, with the end cap portion 112 located at one axial end of the cylindrical portion 111. The cylindrical portion 111 and the end cap portion 112 can be integrally formed, for example, by integral casting or injection molding. Alternatively, the cylindrical portion 111 and the end cap portion 112 can be manufactured separately and then connected together via welding, clamping, threading, or other connection methods. In short, the cylindrical portion 111 and the end cap portion 112 can be relatively fixed.

[0031] The end cover 112 and the cylindrical portion 111 can be enclosed to form an inner cavity 113, and the other end of the cylindrical portion 111, that is, the end away from the end cover 112, can form an opening of the housing 110. Figure 2 As shown, the end cover 112 is provided with a plurality of inlet holes 112a, each of which is in communication with the inner cavity 113. The medium to be dried and filtered can enter the inner cavity 113 of the housing 110 through these inlet holes 112a. An axially extending abutment portion 114 is provided on the side of the end cover 112 facing away from the inner cavity 113. During assembly, the abutment portion 114 is used to abut against other components to create an inflow buffer space on the side of the end cover 112 facing away from the inner cavity 113, thereby facilitating the flow of the medium to be dried and filtered into the inlet holes 112a.

[0032] In the implementation of the accompanying drawings, Figure 2 As shown, the abutment portion 114 can include multiple abutment elements 114a, each of which can be spaced apart circumferentially. With this solution, a gap can exist between two circumferentially adjacent abutment elements 114a. This gap can serve as a radial entry channel, allowing the medium to enter the aforementioned inflow buffer space radially, thereby increasing the applicable scenarios of the filter dryer 100 provided by the present invention. It should be understood that the above design only provides the possibility for the medium to enter the inflow buffer space radially, but does not mean that in actual use, the medium must enter radially. In fact, the medium can still enter axially.

[0033] In some other implementations, the abutting portion 114 may also include only one abutting element 114a. The abutting element 114a may be a solid protruding structure and may be located at any position on the end cover 112, as long as it can assist in forming the aforementioned inflow buffer space. In this implementation, the medium can still enter the inflow buffer space radially. In addition, the abutting element 114a may also be configured as a hollow tubular structure, which can also form an inflow buffer space. The difference is that the tubular abutting element 114a does not have the aforementioned radial inlet channel, so that the medium can only enter the inflow buffer space axially.

[0034] Combine Figure 6 The outer wall surface of the cylindrical portion 111 may be provided with a first annular groove 111 a , and the first annular groove 111 a is used to install a first sealing member 150 , and the first sealing member 150 is used to seal the housing 110 during installation.

[0035] The first seal 150 can be a flexible deformable body made of a flexible material such as rubber, so that it can achieve sealing assembly through its own flexible deformation. In practical applications, the deformation of the first seal 150 during installation with the filter drier 100 can be controlled to reduce the difficulty of installation and the possibility of torsional deformation of the first seal 150 during installation. For example, the deformation of the first seal 150 can be controlled to less than 20%. In this way, the frictional resistance of the filter drier 100 during installation can be reduced, the installation process can be relatively simple, and the torsional deformation of the first seal 150 can be relatively small. Furthermore, the first seal 150 can be coated with a lubricant, such as oil, which can also reduce the difficulty of assembling the filter drier 100 and reduce torsional deformation of the first seal 150.

[0036] Here, the embodiment of the present invention does not limit the number of the first sealing members 150. In practice, those skilled in the art can determine the number according to actual needs, as long as the sealing requirements can be met. It should be noted that the number of the first sealing members 150 and the number of the first annular grooves 111a can be consistent, for example Figure 3 and Figure 6 As shown, when the number of the first sealing members 150 is two, the number of the first annular grooves 111 a may also be two, and the two first sealing members 150 may be assembled in the two first annular grooves 111 a respectively.

[0037] The drying filter unit 120 is the core functional component of the filter drier 100, primarily responsible for performing the drying and filtering function on the media. In practice, the drying filter unit 120 is removably mounted within the inner cavity 113 and axially abuts against the end cap 112. This removable connection ensures that the drying filter unit 120 can be completely removed, allowing for replacement or maintenance in the event of complete or partial failure.

[0038] Here, the embodiment of the present invention does not limit the specific structural form of the above-mentioned drying and filtering unit 120. In actual application, those skilled in the art can select it according to specific needs, as long as it can meet the requirements of use.

[0039] In the implementation of the accompanying drawings, Figure 3 and Figure 9 As shown, the drying filter unit 120 may include an adsorption component 121, the adsorption component 121 may include a mounting plate 121a and an adsorbent 121b, the mounting plate 121a may include a mounting shaft portion 121a-1 and a spiral plate portion 121a-2 extending along the mounting shaft portion 121a-1, and the adsorbent 121b is located between the spiral plate portion 121a-2 and the cylindrical portion 111. In the above scheme, the mounting shaft portion 121a-1 is the structural basis of the mounting plate 121a, which is used to realize the installation of the spiral plate portion 121a-2, and can reduce the deformation of the spiral plate portion 121a-2 during actual application, that is, it can improve the structural rigidity of the mounting plate 121a; and the spiral plate portion 121a-2 can extend the flow path of the medium. According to tests, the length of the spiral flow path formed by the spiral plate portion 121a-2 can be roughly 3 times the length of the linear flow path, which can greatly increase the contact time between the medium and the adsorbent 121b, which is beneficial to improving the drying and filtering function of the drying filter 100.

[0040] The adsorbent 121b can be one or a combination of various adsorbent materials, such as molecular sieves, alumina, and activated carbon. In practical applications, the type of adsorbent material can be selected based on the types of impurities that may be present in the medium, so as to remove specific impurities in a targeted manner. For example, alumina can adsorb acidic substances and water, activated carbon can adsorb paraffin, and molecular sieves have strong adsorption properties for water.

[0041] In the adsorption component 121 , at least one of the mounting plate 121 a and the adsorbent 121 b may abut against the end cover portion 112 in the axial direction, so as to complete the axial abutment limitation of the drying filter unit 120 and the end cover portion 112 .

[0042] The drying and filtration unit 120 may further include a filter element 122, which can be a filter disc having multiple filter holes formed therein. This filter element 122 is used to conduct the medium fluid, thereby reducing pressure drop and simultaneously blocking impurities. While the aforementioned adsorption component 121 performs primary filtration, the filter element 122 here performs secondary filtration. The adsorption component 121 and filter element 122 work together to enhance the drying and filtration performance of the drying and filtration unit 120.

[0043] During assembly, the filter element 122 can be located on the side of the adsorption component 121 facing away from the end cap 112, and the filter element 122 can also abut against the adsorption component 121 along the axial direction, specifically against the adsorbent 121b, or against the mounting shaft 121a-1. Compared to the adsorption component 121, the filter element 122 is a flat sheet structure. Positioning it on the side of the adsorption component 121 facing away from the end cap 112 can, on the one hand, block the adsorbent 121b to prevent it from overflowing, and on the other hand, create a relatively flat end structure for the side of the drying filter unit 120 facing away from the end cap 112, which can facilitate the abutment and positioning of the positioning unit 130 against the drying filter unit 120.

[0044] The positioning unit 130 is detachably mounted in the inner cavity 113 and abuts against the drying filter unit 120 in the axial direction, thereby achieving the positioning and assembly of the drying filter unit 120. The detachable connection ensures that the positioning unit 130 can be completely removed to facilitate maintenance and replacement of the drying filter unit 120.

[0045] like Figure 3 As shown, the inner cavity 113 may include a drying filter chamber 113a and a positioning chamber 113b distributed along the axial direction. The aforementioned drying filter unit 120 may be located in the drying filter chamber 113a, and at least part of the positioning unit 130 may be located in the positioning chamber 113b.

[0046] Combine Figure 6 The cylindrical wall of the cylindrical portion 111 that encloses the positioning chamber 113b can be provided with an outlet hole 111b to facilitate radial outflow of the medium. Thus, for the filter dryer 100 shown in the accompanying drawings, the medium flows axially into the inner cavity 113 along the inlet hole 112a of the end cap 112, and then radially out of the inner cavity 113 along the outlet hole 111b of the cylindrical portion 111. With this design, the positioning unit 130 itself also functions as a buffer space within the positioning chamber 113b. The provision of the buffer space facilitates radial outflow of the medium along the outlet hole 111b.

[0047] The cylindrical wall used to enclose the positioning chamber 113b can also be called the outlet portion. Based on the setting of the outlet portion, the drying filter unit 120 is equivalent to filling the entire area between the end cover portion 112 and the outlet portion. The distribution area of ​​the drying filter unit 120 itself is very large, which is also very beneficial for ensuring the effect of dry filtration.

[0048] In some optional implementations, the positioning unit 130 may include a stopper 131 and an elastic component 132. The stopper 131 may axially abut against the drying filter unit 120, specifically, the aforementioned filter element 122. One end of the elastic component 132 may axially abut against the stopper 131, while the other end of the elastic component 132 may axially abut against the cover 140. The stopper 131 may be connected to the cylindrical portion 111 through the elastic component 132 for a limited position.

[0049] The stopper 131 serves as a transitional component between the elastic member 132 and the filter drying unit 120, enabling surface contact positioning of the elastic member 132, thereby improving the reliability of the elastic member 132 during positioning and assembly. The elastic member 132 can undergo axial expansion and contraction deformation, which allows the axial dimension of the positioning unit 130 to vary, thereby accommodating the positioning and assembly of filter drying units 120 of varying axial dimensions. Furthermore, the stopper 131 can better accommodate axial dimensional variations of the filter drying unit 120 due to factors such as assembly tolerances.

[0050] The elastic component 132 can specifically be a spring. There are many types of springs, which are easily available and selectable. They also possess relatively good elastic deformation capabilities, making them more suitable for use within the filter drier 100 provided by the present invention. Alternatively, the elastic component 132 can be a flexible deformable body made of a material with a certain elastic deformation capability, such as rubber, as long as the material meets the requirements of use.

[0051] Combine Figure 10 and Figure 11The stopper 131 may include a bottom plate portion 131a and an outer tube portion 131b. The bottom plate portion 131a may be provided with a through hole 131a-1 for enabling conduction of the medium. The outer tube portion 131b and the elastic component 132 may both be located on the same axial side of the bottom plate portion 131a. The elastic component 132 may be partially located within the outer tube portion 131b. The outer tube portion 131b may guide the expansion and contraction of the elastic component 132, thereby reducing the possibility of radial movement of the elastic component 132 during installation and use, and facilitating the improvement of the stability of the elastic component 132.

[0052] At least a portion of the outer cylindrical portion 131b is a variable diameter segment, the outer diameter of which gradually increases in the direction away from the drying filter unit 120. Furthermore, this variable diameter segment can be fitted with the cylindrical portion 111 in an interference fit, thereby ensuring the positioning and assembly of the stopper 131 within the cylindrical portion 111. Furthermore, this segment also provides a certain degree of retraction prevention, thereby ensuring the secure installation of the stopper 131 within the cylindrical portion 111. Thus, even without the aid of the elastic member 132, a position-limiting connection can be established between the stopper 131 and the cylindrical portion 111.

[0053] Combine Figure 11 The outer cylinder portion 131b can be provided with a dividing slit 131b-1 extending from one end away from the bottom plate portion 131a to the end close to the bottom plate portion 131a. The dividing slit 131b-1 can extend to the above-mentioned reducing cylinder section. In this way, during the assembly process, the interference of the reducing cylinder section can be partially offset at the dividing slit 131b-1, which can facilitate the installation of the stop member 131.

[0054] The width of the dividing groove 131b-1 may be between 0.2 mm and 0.5 mm, and the ratio between the depth of the dividing groove 131b-1 and the axial dimension of the stopper 131 may be between 80% and 90%, for example, 85%.

[0055] It should be understood that the above description of the specific structure of the positioning unit 130 is merely an illustrative description of an embodiment of the present invention and cannot be used as a limitation on the scope of implementation of the drying filter 100 provided by the present invention. Under the condition that the functions are met, the above positioning unit 130 may also adopt other structural forms. For example, the outer cylinder portion 131b can be a constant diameter cylinder with an unchanged outer diameter, but as long as its outer diameter is increased, an interference fit between it and the cylindrical portion 111 can also be achieved. For another example, with respect to the technical solution in which the drying filter unit 120 includes a filter element 122, since the filter element 122 itself can already achieve surface contact with the elastic component 132, the above-mentioned stopper 131 may also be omitted. In this way, the structure of the drying filter 100 can be further simplified.

[0056] The cover 140 is detachably connected to the other axial end of the cylindrical portion 111 to seal the opening of the housing 110 . Meanwhile, the cover 140 abuts against the positioning unit 130 along the axial direction to position and assemble the positioning unit 130 .

[0057] In an embodiment of the present invention, the cover 140, the positioning unit 130 and the drying filter unit 120 are all detachably assembled, and the drying filter 100 can be conveniently and completely disassembled so that faulty components therein can be replaced or maintained without replacing the entire drying filter 100, which is beneficial to reducing usage costs.

[0058] For example, if the adsorbent 121b within the drying filter unit 120 becomes ineffective, the adsorbent 121b can be poured out and replaced with a new adsorbent 121b, and the mounting plate 121 and filter element 122 can be reused. For another example, if impurities and oil remain on the mounting plate 121 within the drying filter unit 120, the mounting plate 121 can be removed and cleaned, so that it can be reused to essentially the same quality. For another example, if the filter element 122 within the drying filter unit 120 becomes severely clogged, it can be removed and cleaned for repeated use, or it can be replaced.

[0059] In a specific example, the detachable assembly of the positioning unit 130 and the drying filter unit 120 can both be based on the detachable assembly of the cover 140. Specifically, the positioning unit 130 and the drying filter unit 120 can both be placed directly within the housing 110, and the cover 140 can only be connected to the housing 110 to achieve the abutment of the cover 140 against the positioning unit 130 and the abutment of the positioning unit 130 against the drying filter unit 120. In this way, neither the positioning unit 130 nor the drying filter unit 120 requires a connection structure, which helps simplify the structure of the drying filter 100 provided by the present invention.

[0060] Of course, the positioning unit 130 and the drying and filtering unit 120 may also be provided with a detachable connection structure, which is also feasible.

[0061] Here, the embodiments of the present invention do not limit the specific structural form of the above-mentioned detachable connection structure. In actual application, those skilled in the art can select according to specific needs, as long as it can meet the requirements of use. For example, the above-mentioned detachable connection structure can be a threaded structure, a clamping structure, etc.

[0062] Take the card connection solution as an example, Figure 4 and Figure 5As shown, the cover 140 may be provided with a clamping strip 141, and the clamping strip 141 may be provided with a clamping block 141a, which is configured to be clamped with the cylindrical portion 111. Specifically, a stepped surface may be provided in the cylindrical portion 111, and the stepped surface may be clamped with the clamping block 141a; alternatively, the clamping block 141a may be axially abutted against a wall portion of the cylindrical portion 111 that forms the outlet hole 111b, thereby also achieving a clamping connection.

[0063] The clip 141 has a width a, a length b, and a thickness c. These three parameters will affect the elastic deformation performance of the clip 141. In actual use, those skilled in the art can adjust them according to specific needs. For the length b, when it is between 1mm and 4mm, it can be considered as an end cap 140 with a short lever arm, for example Figure 4-Figure 6 As shown, when it is above 4 mm, it can be considered as an end cap 140 with a long lever arm, for example Figure 7 The number of the clamping strips 141 is not limited, and generally speaking, there can be multiple clamping strips 141 , and the clamping strips 141 can be distributed at intervals along the circumference.

[0064] For ease of description, the other parts of the cover 140 except the clip 141 can be referred to as the main body 142. The outer wall surface of the clip 141 and the main body 142 can be rounded to reduce the possibility of the clip 141 breaking during the flipping process. The radius of the rounded transition can be recorded as R.

[0065] In some other implementations, such as Figure 8 As shown, the clamping strip 141 may not be provided, but the clamping block 141 a may be provided directly on the main body 142 , which is also feasible.

[0066] The outer wall of the main body 141 may be provided with a second annular groove 142a for mounting a second sealing member 160. The second sealing member 160 is used to seal the cover 140 during installation. The definitions of the second annular groove 142a and the second sealing member 160 can be found in the aforementioned description of the first annular groove 111a and the first sealing member 150, and are not repeated here.

[0067] The embodiments of the present invention do not limit the application scenarios of the aforementioned filter drier 100. In fact, the filter drier 100 of the embodiments of the present invention is applicable to any scenario requiring drying and filtering functions. For example, the filter drier 100 can be used in refrigeration and air conditioning systems to dry and filter refrigerant, promptly removing impurities, acidic substances, and moisture from the refrigerant, thereby largely preventing water, ice, or dirt blockages in the throttling components of the refrigeration and air conditioning system. Alternatively, the filter drier 100 can also be used in automotive air suspension systems to remove moisture, dust, pollutants, and other small particulate impurities from the air, thereby reducing the blockage of various valves in the air suspension system.

[0068] Please refer to Figure 12 , Figure 12 This is a simplified structural diagram of the device provided by the present invention and equipped with a drying filter.

[0069] like Figure 12 As shown, the present invention also provides a device, which can be, for example, a component in an air suspension system or a refrigeration system, including a device body 200 and a drying filter 100, wherein the drying filter 100 can be the drying filter 100 involved in the aforementioned implementation methods.

[0070] The device body 200 is provided with a housing chamber 210 and a working chamber 220. The filter drier 100 is detachably mounted in the housing chamber 210. The first and second sealing members 150, 160 abut against the peripheral wall of the housing chamber 210 to achieve sealing. The abutting portion 114 abuts against the end wall of the housing chamber 210 to form the aforementioned inflow buffer space between the end cover 112 and the end wall. The device body 200 is further provided with an inlet channel 230 and an outlet channel 240. Both the inlet channel 230 and the outlet channel 240 can be connected to the accommodating chamber 210. After the drying filter 100 is installed, the inlet channel 230 can be specifically connected to the inlet hole 112a of the end cover portion 112 so as to introduce the medium to be dried and filtered into the drying filter 100. The outlet channel 240 can be specifically connected to the outlet hole 111b of the cylindrical portion 111. After the drying and filtration is completed, the medium can be introduced into the working chamber 220 for use through the outlet channel 240.

[0071] The central axis of the inlet channel 230 and the central axis of the filter drier 100 can be substantially parallel. In this case, the medium introduced through the inlet channel 230 can be introduced into the inflow buffer space substantially axially. Alternatively, the central axis of the inlet channel 230 and the central axis of the filter drier 100 can be substantially perpendicular. In this case, the medium introduced through the inlet channel 230 can be introduced into the inflow buffer space substantially radially.

[0072] The detachable connection mode of the drying filter 100 in the accommodating chamber 210 is not limited here, and can be, for example, threaded connection, snap connection, etc. Figure 12 In the implementation mode, a peripheral wall portion of the installation cavity 210 is provided with a card slot, in which a retaining spring 250 can be installed, so as to complete the position-limiting assembly of the drying filter 100 through the retaining spring 250 .

[0073] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drying filter, characterized in that: The filter comprises a housing, a sealing cover and a stopper, wherein the housing comprises a cylindrical portion and an end cover portion, the end cover portion being located at one axial end of the cylindrical portion, the sealing cover being detachably assembled to the other axial end of the cylindrical portion, the filter drier having an inner cavity, the stopper being located in the inner cavity and being limitatively connected to the cylindrical portion; It also includes a drying filter unit, which is detachably assembled in the inner cavity. Along the axial direction of the cylindrical portion, one end of the drying filter unit directly or indirectly abuts against the end cover portion, and the other end directly or indirectly abuts against the stopper.

2. The drying filter according to claim 1, characterized in that: The end cover is provided with an inlet hole, which is communicated with the inner cavity. The end cover is provided with an abutment top portion extending in the axial direction on a side facing away from the inner cavity.

3. The drying filter according to claim 1, characterized in that: The cover is provided with a clamping strip, the clamping strip is provided with a clamping block, and the clamping block is configured to be capable of being clamped with the cylindrical portion.

4. The drying filter according to any one of claims 1 to 3, characterized in that: The portion of the cylindrical portion that is away from the end cover portion forms an outlet portion, and the outlet portion is provided with an outlet hole. The drying filter further includes a positioning unit, and the positioning unit includes the stopper and an elastic component. The stopper is arranged close to the outlet portion, and the elastic component abuts against the stopper and the sealing cover. The drying filter unit is filled between the end cover portion and the outlet portion.

5. The drying filter according to claim 4, characterized in that: The drying filter unit includes an adsorption component, which includes a mounting plate and an adsorbent. The mounting plate includes a mounting shaft and a spiral plate portion extending along the mounting shaft. The adsorbent is located between the spiral plate portion and the cylindrical portion. At least one of the mounting plate and the adsorbent is in contact with the end cover portion.

6. The drying filter according to claim 5, characterized in that: The drying filter unit further includes a filter element, which is located on a side of the adsorption component away from the end cover. The filter element and the adsorption component abut against each other in the axial direction, and the drying filter unit abuts against the stopper through the filter element.

7. The drying filter according to claim 5, characterized in that: The stopper includes a bottom plate and an outer cylinder. The bottom plate is provided with a through hole. The outer cylinder and the elastic component are located on the same axial side of the bottom plate. Part of the elastic component is located radially inward of the outer cylinder.

8. The drying filter according to claim 7, characterized in that: At least part of the outer cylindrical portion is a reducing cylindrical portion, the outer diameter of which gradually increases in the direction away from the drying filter unit, the reducing cylindrical portion and the cylindrical portion are interference fitted, and the outer cylindrical portion is provided with a dividing seam extending axially to the reducing cylindrical portion.

9. A device, characterized in that The device comprises a device body and a drying filter, wherein the device body is provided with a receiving cavity, and the drying filter is detachably assembled in the receiving cavity. The device body is also provided with an inlet channel and an outlet channel, and the inlet channel and the outlet channel are both connected to the receiving cavity. The drying filter is the drying filter according to any one of claims 1 to 8.

10. The device according to claim 9, characterized in that The drying filter also includes a first seal and a second seal. The first seal is located at one end of the cylindrical portion close to the end cover portion, and the first seal abuts between the cylindrical portion and the cavity wall of the accommodating cavity. The second seal abuts between the sealing cover and the cavity wall of the accommodating cavity.

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