Animal laboratory air circulation device

By introducing dehumidification and dust removal components into the air circulation device of the animal laboratory, using a motor to drive rectangular frame and metal shrapnel to vibrate dust removal, combined with heating sheet drying and ultraviolet lamp disinfection, the problems of insufficient dehumidification capacity and reduced sealing in humid environments are solved, and the convenience of efficient air circulation and equipment maintenance is achieved.

CN120479155AInactive Publication Date: 2025-08-15KUNMING MEDICAL UNIVERSITY
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510891041.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-08-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing animal laboratory air circulation device has limited dehumidification capacity in humid environments, and traditional dust removal methods affect sealing performance, resulting in equipment aging and reduced permeability.

Method used

Dehumidification and dust removal components are adopted, including a motor-driven rectangular frame and metal shrapnel vibration dust removal, combined with heating sheet drying and UV lamp disinfection, to achieve automatic vibration dust removal and drying.

Benefits of technology

Improves dehumidification capacity, reduces dust accumulation, maintains the sealing performance of the equipment, provides fresh air, and improves air circulation efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120479155A_ABST
    Figure CN120479155A_ABST
Patent Text Reader

Abstract

The invention relates to the field of air circulation filtration, and discloses an animal laboratory air circulation device which comprises a shell assembly. A wind catching assembly; a purification assembly; an air outlet pipe; a connecting pipe; an air inlet assembly; and a fixing assembly and a dehumidifying and dedusting assembly. When a second fan rotates, outside air can be extracted from left to right from a strip-shaped hole in a semicircular shell, when the outside air is too humid, the air can be dried after a heating piece is started, after long-time use, a filter piece and the second fan can be possibly contaminated by dust, at the moment, a motor is started to swing in a high-frequency reciprocating mode, dust on the filter piece is shaken off, and the air can be dried. When the air circulation assembly is installed, a second metal elastic piece is also vibrated, then dust at a second fan is vibrated, dust at a filter piece and the second fan can reach a dust collection box at the bottom through a round hole to be collected, and the problems that the installation positions of the fan and the shell of the air circulation assembly are tight, and dust cannot be collected are solved. And a shutdown dismounting mode is adopted for cleaning in a traditional mode, so that the sealing performance of equipment is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to the technical field of air circulation and filtration, and in particular to an air circulation device for an animal laboratory. Background Art

[0002] In animal laboratory environments, air quality is crucial to the health of animals, the accuracy of experimental results, and the maintenance of the overall laboratory environment. When the air circulation device of the animal laboratory draws air from the outside, if it encounters humid weather or is located in a high-humidity regional environment, a large amount of humid air will directly enter the laboratory. Excessive humidity will cause the relative humidity in the laboratory to exceed the standard, making the living environment of experimental animals uncomfortable. In addition, the humid air will condense moisture on the surface of the equipment in the laboratory, accelerating the corrosion and aging of the equipment. Some existing air circulation devices use conventional desiccant dehumidification, which has limited dehumidification capacity and requires frequent replacement of desiccant, which not only increases the maintenance workload but also makes it difficult to cope with the continuous high-humidity external environment. In addition, during the air circulation process, dust in the air will inevitably adhere to the filter and fan blades. As time goes by, dust gradually accumulates, resulting in a decrease in the permeability of the filter, a decrease in air flow, an increase in the load of the fan, resulting in a decrease in wind pressure and a deterioration in the air circulation effect. Since the installation position of the air circulation component fan and the casing is relatively close, the traditional method of cleaning is to shut down and disassemble the equipment, which affects work efficiency and causes a decrease in the sealing performance of the equipment. Summary of the Invention

[0003] The present application proposes an animal laboratory air circulation device, which has the advantages of drying air on both sides and automatic vibration dust removal, and is used to solve the problems of limited dehumidification capacity of traditional equipment and poor sealing caused by disassembly and assembly of dust removal.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: an animal laboratory air circulation device, an animal laboratory air circulation device, comprising a shell component, a wind-catching component fixedly mounted on the upper inner side of the shell component, and further comprising: A linked purification and dehumidification cycle mechanism includes a purification component, the purification component is fixedly mounted on the bottom of the wind-catching component, the left side of the housing component is connected to an air outlet pipe and a connecting pipe from top to bottom, the left end of the connecting pipe is fixedly connected to an air inlet component, and a fixing component is fixedly mounted on the outside of the air inlet component; A dehumidification and dust removal component is fixedly installed inside the air inlet component. The dehumidification and dust removal component includes a motor. The output shaft of the motor is fixedly connected to a rectangular frame. A filter is clamped in the rectangular frame. A heating plate is fixedly installed on the left side of the filter. A plurality of second metal shrapnel are fixedly installed on the right side of the rectangular frame. Two second fans are fixedly connected to the inner sides of the plurality of second metal shrapnel. The above structure can dry air and remove dust by vibration during operation.

[0005] Preferably, the motor can drive the rectangular frame and the filter to swing back and forth, and both sides of the heating plate and both sides of the plurality of second metal springs can serve as limit plates when the rectangular frame swings.

[0006] Preferably, the outer shell assembly includes a rectangular shell, the front and rear sides of the rectangular shell are provided with inclined holes, the bottoms of the two inclined holes are fixedly installed with adjustment plates, the top of the rectangular shell is provided with a top hole, and the inner side of the rectangular shell is fixedly installed with a partition plate. The above structure can provide working upper and lower chambers for the wind capture assembly and the purification assembly during operation.

[0007] Preferably, an electric motor is installed at the rotating shaft of the adjusting plate, and the adjusting plate can be rotated by the motor to adjust the opening and closing state and the air outlet angle. The partition plate is installed in the middle position between the inclined hole and the adjusting plate, and the partition plate divides the rectangular shell into two upper and lower chambers.

[0008] Preferably, the wind-catching assembly includes a plurality of first metal shrapnel, which are all fixedly connected to the inner wall of the rectangular shell, and four first fans are fixedly connected to the inner side of the plurality of first metal shrapnel. The four first fans are grouped in two and distributed up and down, and impellers are fixedly connected between the rotating shafts of the four first fans. A circular ring is installed through the outer edge of the impeller, and some blades between the two impellers are staggered and engaged. The above structure can capture and extract the indoor air during operation.

[0009] Preferably, the purification component includes four cotton sheets, ultraviolet lamps are installed between the four cotton sheets, and a dehumidification rod is installed between the four cotton sheets and the three ultraviolet lamps. The above structure can perform secondary drying and purification on the air input from the outside during operation.

[0010] Preferably, the interior of the dehumidification rod is filled with carbon powder, a plurality of air holes are provided on the outer edge of the dehumidification rod, and the bottom of the dehumidification rod is fixedly connected to the inner bottom surface of the rectangular shell.

[0011] Preferably, the air inlet assembly includes a semicircular shell, a plurality of strip holes are opened on the left side of the semicircular shell, a circular hole is opened at the bottom of the semicircular shell, a dust collection box is magnetically adsorbed on the bottom of the circular hole, two rubber sheets are fixedly connected to the right end of the semicircular shell, the top and bottom of the two rubber sheets are connected to rubber plates, and a cover plate is fixedly installed on the inner sides of the two rubber sheets and the two rubber plates.

[0012] Preferably, the inner wall of the semicircular shell is fixedly connected to a plurality of second metal springs, and the cover plate is fixedly connected to the connecting pipe. The above structure can fix the dehumidification and dust removal assembly during operation.

[0013] Preferably, the fixing assembly includes two track grooves, and a plurality of rectangular blocks are clamped in the track grooves. The backs of the plurality of rectangular blocks are fixedly connected with a telescopic rod, the telescopic end of the telescopic rod is sleeved with a spring, and the fixed end of the telescopic rod is fixedly connected to the outer edge of the semicircular shell. The above structure can fix the air inlet assembly during operation.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention is equipped with a dehumidification and dust removal component and an air intake component. When the second fan rotates, it will draw outside air from left to right through the strip hole in the semicircular shell. If the outside air is too humid, the heating plate can be started to heat the humid air. After long-term use, the filter and the second fan may be contaminated with dust. At this time, the motor can be swung back and forth. The two ends of the heating plate and the edges of the second metal spring will act as limit blocks for the rotation of the rectangular frame. When the motor swings back and forth at a high frequency, the dust on the filter will be shaken off, and the second metal spring will also have a vibration effect. At this time, the dust on the second fan will also be vibrated down, and the dust on the filter and the second fan will pass through the circular hole to the dust collecting box at the bottom for collection, thereby solving the problem that the fan and the shell of the air circulation component are installed very closely. The traditional method uses the method of stopping and disassembling for cleaning, which will cause the sealing performance of the equipment to deteriorate.

[0015] 2. The present invention is equipped with an outdoor heating plate and an indoor purification component. If the outside air is too humid, the heating plate can be activated to heat the humid air. When the outside air circulates into the purification component, the dehumidification rod and cotton sheet can perform secondary drying on the extracted air, and can also be disinfected by ultraviolet light irradiation. The treated outside air will continuously overflow through the regulating plate to provide fresh air for the room, solving the problem that some existing air circulation devices use conventional desiccant dehumidification, which has limited dehumidification capacity and requires frequent replacement of desiccant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0017] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the housing assembly of the present invention; Figure 3 This is a schematic structural diagram of the wind-catching component of the present invention; Figure 4 This is a schematic structural diagram of the purification component of the present invention; Figure 5 This is a structural diagram of the air inlet assembly of the present invention; Figure 6 This is a structural diagram of the fixing assembly of the present invention; Figure 7 This is a cross-sectional view of the air inlet assembly structure of the present invention; Figure 8 This is a schematic diagram of the structure of the dehumidification and dust removal component of the present invention.

[0018] Among them: 1. Shell assembly; 2. Wind-catching assembly; 3. Purification assembly; 4. Air outlet duct; 5. Connecting pipe; 6. Air inlet assembly; 7. Fixing assembly; 8. Dehumidification and dust removal assembly; 11. Rectangular shell; 12. Inclined hole; 13. Adjustment plate; 14. Top hole; 15. Partition plate; 21. First metal spring; 22. First fan; 23. Impeller; 24. Ring; 31. Cotton sheet; 32. Ultraviolet lamp; 33. Dehumidification rod; 61. Semicircular shell; 62. Strip hole; 63. Round hole; 64. Dust collection box; 65. Rubber sheet; 66. Rubber plate; 67. Cover plate; 71. Track groove; 72. Rectangular block; 73. Telescopic rod; 74. Spring; 81. Motor; 82. Rectangular frame; 83. Filter; 84. Heating plate; 85. Second metal spring; 86. Second fan. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] See also Figure 1-8The animal laboratory air circulation device of this embodiment includes a housing component 1, a wind-catching component 2 is fixedly installed on the upper side of the interior of the housing component 1, and also includes a linked purification and dehumidification circulation mechanism, which includes a purification component 3, which is fixedly installed at the bottom of the wind-catching component 2. The left side of the housing component 1 is connected to an air outlet pipe 4 and a connecting pipe 5 from top to bottom, respectively. The left end of the connecting pipe 5 is fixedly connected to an air inlet component 6, and a fixing component 7 is fixedly installed on the outside of the air inlet component 6; The dehumidification and dust removal component 8 is fixedly installed inside the air inlet component 6. The dehumidification and dust removal component 8 includes a motor 81. The output shaft of the motor 81 is fixedly connected to a rectangular frame 82. A filter 83 is clamped in the rectangular frame 82. A heating plate 84 is fixedly installed on the left side of the filter 83. A plurality of second metal springs 85 are fixedly installed on the right side of the rectangular frame 82. Two second fans 86 are fixedly connected to the inner sides of the plurality of second metal springs 85. The motor 81 can drive the rectangular frame 82 and the filter 83 to swing back and forth. The two sides of the heating plate 84 and the two sides of the plurality of second metal springs 85 can serve as limit plates when the rectangular frame 82 swings. When the wind-catching component 2 is started, the second fan 86 is started synchronously. When the second fan 86 rotates, it draws outside air from the bar hole 62 in the semicircular shell 61 from left to right, and after being filtered by the filter 83, it reaches the lower chamber of the outer shell component 1 through the connecting pipe 5. If the outside air is too humid, the heating plate 84 can be started to heat the humid air. After long-term use, the filter 83 and the second fan 86 may be contaminated with dust. At this time, the motor 81 can be swung back and forth. The two ends of the heating plate 84 and the edge of the second metal spring 85 will act as limit blocks for the rotation of the rectangular frame 82. When the motor 81 swings back and forth at a high frequency, it will vibrate the second metal spring 85. At this time, the dust on the second fan 86 will also be shaken down, and the dust on the filter 83 and the second fan 86 will pass through the circular hole 63 and reach the dust collection box 64 at the bottom for collection. This solves the problem that the installation position of the fan and the outer shell of the air circulation component is relatively close. The traditional method of cleaning by stopping and disassembling the machine will cause the sealing performance of the equipment to deteriorate. The housing assembly 1 includes a rectangular shell 11, with oblique holes 12 formed on both the front and rear sides of the rectangular shell 11. Adjustment plates 13 are fixedly mounted at the bottom of the two oblique holes 12. A top hole 14 is formed on the top of the rectangular shell 11, and a partition plate 15 is fixedly mounted on the inside of the rectangular shell 11. An electric motor is mounted on the rotating shaft of the adjustment plate 13, and the opening and closing state and the air outlet angle can be adjusted by rotating the motor. The partition plate 15 is mounted in the middle of the oblique holes 12 and the adjustment plate 13. The partition plate 15 divides the rectangular shell 11 into two upper and lower chambers. The wind-catching component 2 inside the housing component 1 is first started, and the first fan 22 rotates, driving the two impellers 23 to rotate. When the two impellers 23 rotate, they capture the indoor air through the inclined holes 12 and the top holes 14. The processed outside air will continuously overflow through the regulating piece 13 to provide fresh air to the room. The regulating piece 13 can be adjusted by the motor to adjust the opening and closing state and the air outlet angle; The wind-catching assembly 2 includes a plurality of first metal shrapnels 21, each of which is fixedly connected to the inner wall of the rectangular shell 11. Four first fans 22 are fixedly connected to the inner side of the plurality of first metal shrapnels 21. The four first fans 22 are arranged in groups of two and are distributed vertically. An impeller 23 is fixedly connected between the rotating shafts of the four first fans 22. A circular ring 24 is installed through the outer edge of the impeller 23, and some blades between two impellers 23 are staggered and interlocked. The first fan 22 rotates, driving the two impellers 23 to rotate. When the two impellers 23 rotate, they capture indoor air through the inclined holes 12 and the top hole 14, collect the collected air, and then discharge it to the outside through the air outlet duct 4. Due to the staggered design, the blades of the rear-stage impeller 23 will not be directly in the wake of the front-stage impeller 23, thus avoiding airflow disturbance and improving air capture efficiency. The purification component 3 includes four cotton sheets 31, each of which is equipped with an ultraviolet lamp 32. A dehumidification rod 33 is installed between the four cotton sheets 31 and the three ultraviolet lamps 32. The interior of the dehumidification rod 33 is filled with carbon powder, and the outer edge of the dehumidification rod 33 is provided with multiple ventilation holes. The bottom of the dehumidification rod 33 is fixedly connected to the inner bottom surface of the rectangular shell 11. When the outside air circulates into the purification component 3, the dehumidification rod 33 and the cotton sheet 31 can perform secondary drying on the extracted air, and the ultraviolet lamp 32 irradiates and disinfects it. The treated outside air will continuously overflow through the regulating sheet 13 to provide fresh air for the room. Among them, the air inlet assembly 6 includes a semicircular shell 61, a plurality of strip-shaped holes 62 are opened on the left side of the semicircular shell 61, a circular hole 63 is opened at the bottom of the semicircular shell 61, and a dust collection box 64 is magnetically adsorbed at the bottom of the circular hole 63. Two rubber sheets 65 are fixedly connected to the right end of the semicircular shell 61, and the top and bottom of the two rubber sheets 65 are connected to rubber plates 66. A cover plate 67 is fixedly installed on the inner side of the two rubber sheets 65 and the two rubber plates 66; the inner wall of the semicircular shell 61 is fixedly connected to the plurality of second metal springs 85, and the cover plate 67 is fixedly connected to the connecting pipe 5; When the second fan 86 rotates, it draws in outside air from left to right through the strip hole 62 in the semicircular shell 61. The dust on the filter 83 and the second fan 86 will pass through the circular hole 63 and reach the dust collection box 64 at the bottom for collection. By changing the length of the rubber sheet 65 and the rubber plate 66, the length of the air duct when the second fan 86 is entering the air can also be changed. The fixing assembly 7 includes two track grooves 71, in which a plurality of rectangular blocks 72 are clamped. The backs of the plurality of rectangular blocks 72 are fixedly connected to telescopic rods 73, and the telescopic ends of the telescopic rods 73 are sleeved with springs 74. The fixed ends of the telescopic rods 73 are fixedly connected to the outer edge of the semicircular shell 61. The rectangular block 72 is installed in the track groove 71. When the air inlet assembly 6 is moved to change the length of its air duct, the telescopic rod 73 and the spring 74 will cooperate to shrink or grow.

[0021] Working principle: When using the present invention, first install the air inlet assembly 6 outdoors through the fixing assembly 7, first fix the two track grooves 71, then install the rectangular block 72 in the track groove 71, connect the connecting pipe 5 between the fixing assembly 7 and the outer shell assembly 1, and when air circulation is required, the wind capture assembly 2 inside the outer shell assembly 1 is first started, the first fan 22 rotates, and drives the two impellers 23 to rotate. When the two impellers 23 rotate, they capture the indoor air through the inclined hole 12 and the top hole 14, collect the air, and then discharge it to the outside through the air outlet pipe 4; When the wind-catching component 2 is started, the second fan 86 is started synchronously. When the second fan 86 rotates, it draws outside air from the bar hole 62 in the semicircular shell 61 from left to right, and after being filtered by the filter 83, it reaches the lower chamber of the outer shell component 1 through the connecting pipe 5. If the outside air is too humid, the heating plate 84 can also be started to heat the humid air. After long-term use, the filter 83 and the second fan 86 may be contaminated with dust. At this time, the motor 81 can be swung back and forth, and the two ends of the heating plate 84 and the edge of the second metal spring 85 will act as limit blocks for the rotation of the rectangular frame 82. When the motor 81 swings back and forth at a high frequency, it will vibrate the second metal spring 85. At this time, the dust on the second fan 86 will also be vibrated down, and the dust on the filter 83 and the second fan 86 will pass through the circular hole 63 to the dust collection box 64 at the bottom for collection. When the outside air circulates into the purification component 3, the dehumidification rod 33 and the cotton sheet 31 can perform secondary drying on the extracted air, and the ultraviolet lamp 32 can also be used for disinfection. The outside air after treatment will continuously overflow through the adjustment piece 13 to provide fresh air for the room. The adjustment piece 13 can be adjusted by the motor to adjust the opening and closing state and the air outlet angle.

[0022] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An animal laboratory air circulation device, comprising a housing assembly (1), characterized in that: A wind-catching component (2) is fixedly mounted on the inner upper side of the housing component (1), and further comprises: A linked purification and dehumidification circulation mechanism comprises a purification component (3), the purification component (3) being fixedly mounted on the bottom of the wind-catching component (2), the left side of the housing component (1) being connected to an air outlet pipe (4) and a connecting pipe (5) from top to bottom, the left end of the connecting pipe (5) being fixedly connected to an air inlet component (6), and a fixing component (7) being fixedly mounted on the outer side of the air inlet component (6); A dehumidification and dust removal component (8), wherein the dehumidification and dust removal component (8) is fixedly installed inside the air inlet component (6), and the dehumidification and dust removal component (8) includes a motor (81), an output shaft of the motor (81) is fixedly connected to a rectangular frame (82), a filter (83) is clamped inside the rectangular frame (82), a heating plate (84) is fixedly installed on the left side of the filter (83), a plurality of second metal shrapnels (85) are fixedly installed on the right side of the rectangular frame (82), and two second fans (86) are fixedly connected to the inner sides of the plurality of second metal shrapnels (85).

2. The animal laboratory air circulation device according to claim 1, characterized in that: The motor (81) can drive the rectangular frame (82) and the filter (83) to swing back and forth, and both sides of the heating plate (84) and both sides of the plurality of second metal springs (85) can serve as limit plates when the rectangular frame (82) swings.

3. The animal laboratory air circulation device according to claim 1, characterized in that: The housing assembly (1) comprises a rectangular shell (11), wherein inclined holes (12) are provided on both the front and rear sides of the rectangular shell (11), and adjusting plates (13) are fixedly mounted on the bottoms of the two inclined holes (12). A top hole (14) is provided on the top of the rectangular shell (11), and a partition plate (15) is fixedly mounted on the inner side of the rectangular shell (11).

4. The animal laboratory air circulation device according to claim 3, characterized in that: An electric motor is installed at the rotating shaft of the regulating piece (13), and the regulating piece (13) can be rotated by the motor to adjust the opening and closing state and the air outlet angle. The partition plate (15) is installed in the middle position of the inclined hole (12) and the regulating piece (13), and the partition plate (15) divides the rectangular shell (11) into two upper and lower chambers.

5. The animal laboratory air circulation device according to claim 4, characterized in that: The wind-catching assembly (2) comprises a plurality of first metal shrapnel (21), the plurality of first metal shrapnel (21) being fixedly connected to the inner wall of the rectangular shell (11), four first fans (22) being fixedly connected to the inner sides of the plurality of first metal shrapnel (21), the four first fans (22) being grouped in two and distributed up and down, an impeller (23) being fixedly connected between the rotating shafts of the four first fans (22), a circular ring (24) being installed through the outer edge of the impeller (23), and some blades between the two impellers (23) being staggered and engaged.

6. The animal laboratory air circulation device according to claim 5, characterized in that: The purification component (3) comprises four cotton sheets (31), ultraviolet lamps (32) are installed between the four cotton sheets (31), and a dehumidification rod (33) is installed between the four cotton sheets (31) and the three ultraviolet lamps (32).

7. The animal laboratory air circulation device according to claim 6, characterized in that: The interior of the dehumidification rod (33) is filled with carbon powder, the outer edge of the dehumidification rod (33) is provided with a plurality of air holes, and the bottom of the dehumidification rod (33) is fixedly connected to the inner bottom surface of the rectangular shell (11).

8. The animal laboratory air circulation device according to claim 1, characterized in that: The air inlet assembly (6) includes a semicircular shell (61), a plurality of strip-shaped holes (62) are opened on the left side of the semicircular shell (61), a circular hole (63) is opened on the bottom of the semicircular shell (61), a dust collecting box (64) is magnetically adsorbed on the bottom of the circular hole (63), two rubber sheets (65) are fixedly connected to the right end of the semicircular shell (61), the tops and bottoms of the two rubber sheets (65) are connected to rubber plates (66), and a cover plate (67) is fixedly installed on the inner sides of the two rubber sheets (65) and the two rubber plates (66).

9. The animal laboratory air circulation device according to claim 8, characterized in that: The inner wall of the semicircular shell (61) is fixedly connected to a plurality of second metal springs (85), and the cover plate (67) is fixedly connected to the connecting pipe (5).

10. The animal laboratory air circulation device according to claim 9, characterized in that: The fixing assembly (7) comprises two track grooves (71), a plurality of rectangular blocks (72) are clamped in the track grooves (71), the backs of the plurality of rectangular blocks (72) are fixedly connected to telescopic rods (73), the telescopic ends of the telescopic rods (73) are sleeved with springs (74), and the fixed ends of the telescopic rods (73) are fixedly connected to the outer edge of the semicircular shell (61).