Compressed air filtering device convenient to replace for freeze dryer

Abstract

The compressed air filtering device comprises a compressor main body, an air inlet filtering cylinder is arranged at the compressed air inlet end of the compressor main body, a filter screen containing groove is formed in the middle of the air inlet filtering cylinder, a filter screen replacing structure is arranged in the filter screen containing groove, and a filter screen is arranged in the filter screen replacing structure. A filter screen is arranged in the middle of the filter screen replacement structure; a filter screen replacing structure is installed in a filter screen containing groove, when a filter screen needs to be replaced, a rotating handle is rotated anticlockwise to drive an upper convex positioning wheel set to rotate, a lower convex positioning wheel set connected with the upper convex positioning wheel set rotates along with the upper convex positioning wheel set, and the filter screen is pushed out of the filter screen containing groove; then, positioning holes in the two sides of a new filter screen are aligned to convex columns on the convex positioning wheel set, the rotary handle is rotated clockwise, the filter screen is fed into the filter screen containing groove through the convex positioning wheel set, and replacement of the filter screen is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of freeze dryers, in particular to a compressed air filter device for a freeze dryer which is easy to replace. Background Art

[0002] Freeze dryer (also known as vacuum freeze dryer) originated from the vacuum freeze drying technology in the 1920s. It is mainly composed of drying box, heating system, vacuum system, refrigeration system, control system and other parts. Vacuum freeze drying technology is widely used in fields other than medicine, biological products, food, blood products and active substances.

[0003] The compressor is usually used as the core of the refrigeration system. When the compressed air quality is poor (such as mixed with dust and grease), these impurities will adhere to the heat exchanger, reducing work efficiency. At the same time, the drainage fluid is prone to failure. It is necessary to install a filter device at the compressed air inlet end to ensure the stable operation of the freeze dryer.

[0004] The filtering device of many freeze dryers is designed to be installed in the box. During actual use, the box needs to be disassembled to replace the filter and remove impurities, which makes the cleaning work difficult. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a compressed air filter device for a freeze dryer that is easy to replace, so as to solve the problem of convenient and quick replacement of the filter screen proposed in the above background technology.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a compressed air filter device for a freeze dryer that is easy to replace, comprising a compressor body, an air intake filter cartridge provided at the compressed air inlet end of the compressor body, a filter screen placement groove provided in the middle of the air intake filter cartridge, a filter screen replacement structure provided in the filter screen placement groove, and a filter screen provided in the middle of the filter screen replacement structure;

[0009] The filter replacement structure includes an upper convex positioning wheel group, an upper concave positioning wheel group, a lower convex positioning wheel group, a lower concave positioning wheel group, a rotating handle and a connecting belt; the upper convex positioning wheel group and the upper concave positioning wheel group are rotatably fixed on the upper inner part of the air intake filter cartridge, the upper concave positioning wheel group is arranged in front of the upper convex positioning wheel group, the upper convex positioning wheel group rotating shaft is fixedly connected to the rotating shaft of the rotating handle, the rotating handle is arranged on the outer wall of the air intake filter cartridge, the lower convex positioning wheel group and the lower concave positioning wheel group are rotatably fixed on the bottom inner side of the air intake filter cartridge, the lower concave positioning wheel group is arranged in front of the lower convex positioning wheel group, and the connecting belt connects the upper convex positioning wheel group and the lower convex positioning wheel group.

[0010] As a preferred embodiment of the present invention, a sealing groove is provided at the bottom of the filter screen replacement structure, and a sealing strip is provided in the sealing groove.

[0011] As a preferred embodiment of the present invention, a fixing buckle is provided on the top of the filter placement slot.

[0012] As a preferred embodiment of the present invention, the filter screen includes a filter screen core, side filter screen edges, a filter screen bottom edge and a filter screen top edge; side filter screen edges are fixed on both sides of the filter screen core, the filter screen bottom edge is fixed at the bottom of the filter screen core, and the filter screen top edge is fixed at the top of the filter screen core.

[0013] As a preferred embodiment of the present invention, the vertical edge of the side filter is provided with positioning holes, which are evenly distributed on the vertical edge of the side filter and cooperate with the protrusions of the upper convex positioning wheel group and the lower convex positioning wheel group.

[0014] As a preferred embodiment of the present invention, the convex column on the upper convex positioning wheel set is coupled with the concave column on the upper concave positioning wheel set, and the convex column on the lower convex positioning wheel set is coupled with the concave column on the lower concave positioning wheel set.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The utility model installs the filter replacement structure in the filter placement groove. When the filter needs to be replaced, the rotating handle is rotated counterclockwise to drive the upper convex positioning wheel group to rotate, and the lower convex positioning wheel group connected to it rotates accordingly to push the filter out of the filter placement groove. Then, the positioning holes on both sides of the new filter are aligned with the convex columns on the upper convex positioning wheel group, and the rotating handle is rotated clockwise to send the filter into the filter placement groove by the upper convex positioning wheel group to complete the filter replacement.

[0017] The utility model provides a sealing groove at the bottom of the filter replacement structure, and a sealing strip is used to seal the bottom edge of the filter and the sealing groove to prevent dust and grease in the compressed gas from entering the heat exchanger and reducing work efficiency. At the same time, a fixing buckle is installed on the top of the filter placement groove to fix the filter, preventing the filter from shaking during operation and affecting the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall planar structure of the utility model;

[0019] Figure 2 This is an enlarged planar structural diagram of the filter replacement structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the plane structure of the filter screen of the present invention.

[0021] In the figure: 1. Compressor body; 2. Air intake filter cartridge; 3. Filter placement slot; 301. Fixing buckle; 4. Filter replacement structure; 401. Upper convex positioning wheel assembly; 402. Upper concave positioning wheel assembly; 403. Lower convex positioning wheel assembly; 404. Lower concave positioning wheel assembly; 405. Rotating handle; 406. Connecting belt; 407. Sealing groove; 408. Sealing strip; 5. Filter; 501. Filter core; 502. Side filter vertical edge; 503. Bottom edge of filter; 504. Top edge of filter; 505. Positioning hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 3 As shown, the utility model provides a compressed air filter device for a freeze dryer that is easy to replace, including a compressor body 1, an air intake filter cartridge 2 is provided at the compressed air inlet end of the compressor body 1, a filter screen placement groove 3 is provided in the middle of the air intake filter cartridge 2, a filter screen replacement structure 4 is provided in the filter screen placement groove 3, and a filter screen 5 is provided in the middle of the filter screen replacement structure 4.

[0024] refer to Figure 1-3 , the filter replacement structure 4 includes an upper convex positioning wheel group 401, an upper concave positioning wheel group 402, a lower convex positioning wheel group 403, a lower concave positioning wheel group 404, a rotating handle 405 and a connecting belt 406; the upper convex positioning wheel group 401 and the upper concave positioning wheel group 402 are rotatably fixed on the upper inner part of the air intake filter cartridge 2, the upper concave positioning wheel group 402 is arranged in front of the upper convex positioning wheel group 401, the rotating axis of the upper convex positioning wheel group 401 is fixedly connected with the rotating axis of the rotating handle 405, the rotating handle 405 is arranged on the outer wall of the air intake filter cartridge 2, and the lower convex positioning wheel group 403 and the lower concave positioning wheel group 404 are rotatably fixed on the bottom inner side of the air intake filter cartridge 2, the lower concave positioning wheel group 404 is arranged in front of the lower convex positioning wheel group 403, and the connecting belt 406 connects the upper convex positioning wheel group 401 and the lower convex positioning wheel group 403;

[0025] The side filter screen vertical edge 502 is provided with positioning holes 505 , which are evenly distributed on the side filter screen vertical edge 502 and match with the protrusions of the upper convex positioning wheel group 401 and the lower convex positioning wheel group 403 .

[0026] By installing the filter replacement structure 4 in the filter placement slot 3, when the filter 5 needs to be replaced, the rotating handle 405 is rotated counterclockwise to drive the upper convex positioning wheel group 401 to rotate, and the lower convex positioning wheel group 403 connected to it rotates accordingly to push the filter 5 out of the filter placement slot 3, then align the positioning holes 505 on both sides of the new filter 5 with the protrusions on the upper convex positioning wheel group 401, and rotate the rotating handle 405 clockwise to allow the upper convex positioning wheel group 401 to send the filter 5 into the filter placement slot 3, completing the replacement of the filter 5.

[0027] refer to Figure 1-3 A sealing groove 407 is provided at the bottom of the filter replacement structure 4, a sealing strip 408 is provided in the sealing groove 407, and a fixing buckle 301 is provided at the top of the filter placement groove 3.

[0028] By opening a sealing groove 407 at the bottom of the filter replacement structure 4, the bottom edge 503 of the filter is sealed with the sealing groove 407 by a sealing strip 408 to prevent dust and grease in the compressed gas from entering the heat exchanger and reducing work efficiency. At the same time, a fixing buckle 301 is installed on the top of the filter placement groove 3 to fix the filter 5 to prevent the filter 5 from shaking during operation and affecting the filtering effect.

[0029] How to use

[0030] When the filter screen 5 needs to be replaced, the fixing buckle 301 is opened and the rotating handle 405 is rotated counterclockwise. The upper convex positioning wheel group 401 rotates, and the lower convex positioning wheel group 403 connected thereto rotates accordingly. At this time, the positioning holes 505 on both sides of the filter screen 5 move upward with the rotation of the upper convex positioning wheel group 401 and the lower convex positioning wheel group 403, so that the filter screen 5 is lifted from the filter screen placement slot 3, and the filter screen 5 is removed. The positioning holes 505 on both sides of the new filter screen 5 are aligned with the protrusions on the upper convex positioning wheel group 401, and the rotating handle 405 is rotated clockwise. The filter screen 5 is sent into the filter screen placement slot 3 by the upper convex positioning wheel group 401. When the filter screen bottom edge 503 of the filter screen 5 enters the sealing groove 407, the filter screen top edge 504 coincides with the surface of the filter screen placement slot 3, and the fixing buckle 301 is closed to fix the filter screen 5, and the replacement of the filter screen 5 is completed.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover 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.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressed air filter device for a freeze dryer that is easy to replace, comprising a compressor body (1), characterized in that: The compressor body (1) is provided with an air intake filter cartridge (2) at the compressed air inlet end, a filter screen placement slot (3) is provided in the middle of the air intake filter cartridge (2), a filter screen replacement structure (4) is provided in the filter screen placement slot (3), and a filter screen (5) is provided in the middle of the filter screen replacement structure (4); The filter replacement structure (4) comprises an upper convex positioning wheel group (401), an upper concave positioning wheel group (402), a lower convex positioning wheel group (403), a lower concave positioning wheel group (404), a rotating handle (405) and a connecting belt (406); the upper convex positioning wheel group (401) and the upper concave positioning wheel group (402) are rotatably fixed to the upper part of the air intake filter cartridge (2), the upper concave positioning wheel group (402) is arranged in front of the upper convex positioning wheel group (401), and the upper convex positioning wheel group The rotating shaft (401) is fixedly connected to the rotating shaft of the rotating handle (405), and the rotating handle (405) is arranged on the outer wall of the air intake filter cartridge (2). A lower convex positioning wheel group (403) and a lower concave positioning wheel group (404) are rotatably fixed to the bottom of the inner side of the air intake filter cartridge (2), and the lower concave positioning wheel group (404) is arranged in front of the lower convex positioning wheel group (403). The connecting belt (406) connects the upper convex positioning wheel group (401) and the lower convex positioning wheel group (403).

2. The easily replaceable compressed air filter device for a freeze dryer according to claim 1, characterized in that: A sealing groove (407) is provided at the bottom of the filter screen replacement structure (4), and a sealing strip (408) is provided in the sealing groove (407).

3. The easily replaceable compressed air filter device for a freeze dryer according to claim 1, characterized in that: A fixing buckle (301) is provided on the top of the filter placement slot (3).

4. The easily replaceable compressed air filter device for a freeze dryer according to claim 1, characterized in that: The filter screen (5) comprises a filter screen core (501), side filter screen edges (502), a filter screen bottom edge (503) and a filter screen top edge (504); the side filter screen edges (502) are fixed on both sides of the filter screen core (501), the filter screen bottom edge (503) is fixed on the bottom of the filter screen core (501), and the filter screen top edge (504) is fixed on the top of the filter screen core (501).

5. The easily replaceable compressed air filter device for a freeze dryer according to claim 4, characterized in that: The side filter screen vertical edge (502) is provided with positioning holes (505), and the positioning holes (505) are evenly distributed on the side filter screen vertical edge (502) and cooperate with the protrusions of the upper convex positioning wheel group (401) and the lower convex positioning wheel group (403).

6. The easily replaceable compressed air filter device for a freeze dryer according to claim 1, characterized in that: The convex column on the upper convex positioning wheel set (401) is coupled with the concave column on the upper concave positioning wheel set (402), and the convex column on the lower convex positioning wheel set (403) is coupled with the concave column on the lower concave positioning wheel set (404).

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