Experimental animal IVC system

Abstract

The utility model belongs to the field of experimental animal feeding. The system comprises a main machine, cage boxes and a cage frame, a plurality of independent spaces for containing the cage boxes are arranged on the cage frame, a circulating air supply mechanism for supplying air to the cage boxes is arranged between the main machine and the cage frame, guide rails for containing the cage boxes are arranged on the two sides of each independent space, and a cage box installation indicator is arranged on at least one guide rail; the cage installation indicator is rotatably connected with the guide rail, one end of the cage installation indicator extends upwards to the upper side of the guide rail, the other end of the cage installation indicator is provided with a position indicator on the lower side of the guide rail, and the center of gravity of the cage installation indicator is located on the side, close to the position indicator, of the rotation axis. According to the experimental animal IVC system capable of supplying and exhausting air continuously, the main machine equipment for supplying and exhausting air adopts the mode that double fans work simultaneously to provide power for supplying and exhausting air for the IVC system, even if one fan breaks down, the other fan can provide stable air flow for the system, shutdown for maintenance is not needed, and the working efficiency is improved. And the system can operate stably.

Description

Technical Field

[0001] The utility model belongs to the field of experimental animal breeding, in particular to an experimental animal IVC system. Background Art

[0002] IVC (individual ventilated cages) refers to a micro SPF-level experimental animal breeding and experimental equipment in which clean air with a high ventilation frequency (20-60 times) circulates independently in a closed and independent cage, exhaust gas is discharged centrally, and operations and experiments can be performed in a clean bench or biosafety cabinet.

[0003] The laboratory animal IVC (independent ventilation cage) system is a small barrier device with strict microbial control and independent air supply and exhaust in the feeding box. It can provide strong support for scientific researchers, promote the improvement of experimental animal welfare and the smooth development of scientific research.

[0004] Working principle of IVC: After multi-stage filtration, the air is sent into each independent breeding cage through the air supply duct to keep the breeding environment at a certain pressure and cleanliness, which is used to avoid environmental pollution of animals (positive pressure) or animal pollution of the environment (negative pressure). All IVC-related experimental operations need to be carried out in an ultra-clean workbench (positive pressure) or a biological safety cabinet (negative pressure) to achieve the purpose of micro-environment purification and sterile operation.

[0005] Each independent cage is installed on the cage frame, and the small animals used for experiments are kept in the cage. Live animals will perform various activities, and their vital signs are one of the important data of the experiment. Therefore, the cage needs to be firmly installed on the cage frame to ensure that the experimental animals will not fall during various activities, thereby affecting the experiment.

[0006] In the prior art, there is no prompt to check whether the cage box is correctly installed on the cage frame. When placing the cage box, the staff only judges whether the installation is accurate based on personal experience. If the installation is not in place, there will be hidden dangers such as the cage box falling. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an IVC system for experimental animals which can clearly indicate whether a cage box is correctly installed on a cage frame.

[0008] The technical solution adopted by the utility model to solve the technical problem is as follows: the experimental animal IVC system comprises a main unit, a cage box and a cage frame, a plurality of independent spaces for placing the cage boxes are arranged on the cage frame, a circulating air supply mechanism for supplying air to the cage boxes is arranged between the main unit and the cage frame, guide rails for placing the cage boxes are arranged on both sides of each independent space, and at least one guide rail is provided with a cage box installation indicator;

[0009] The cage box installation indicator is rotatably connected to the guide rail, one end of the cage box installation indicator extends upward to the upper side of the guide rail, and the other end is provided with a position indicator, which is arranged on the lower side of the guide rail, and the center of gravity of the cage box installation indicator is located on the side of its rotation axis close to the position indicator.

[0010] Preferably, the cage box installation indicator includes a rotating shaft, a first bottom plate, a second bottom plate and an indicator protrusion. The rotating shaft is rotatably connected to the guide rail. The first bottom plate and the second bottom plate are respectively arranged on both sides of the rotating shaft. The indicator protrusion is arranged on the upper side of the first bottom plate and extends upward to the upper side of the guide rail. The position indicator is an indicator plate arranged on the second bottom plate. The center of gravity of the cage box installation indicator is located on the second bottom plate.

[0011] Preferably, the guide rail includes a guide rail base plate and guide rail bosses arranged on both sides of the guide rail base plate, a through hole is arranged on the guide rail base plate, and the indicator protrusion passes upward through the through hole.

[0012] Preferably, the upper and lower parts of the guide rail boss are symmetrically arranged on the guide rail base plate, the upper part of the guide rail boss is provided with a guide rail groove, support plates are respectively provided on both sides of the cage box, the support plates include a support plate base plate and support plate bosses arranged on both sides of the support plate base plate, a support plate protrusion is arranged on the lower side of the support plate boss, and the support plate protrusion is arranged in the guide rail groove.

[0013] Preferably, the circulating air supply mechanism includes a fan, a cage main air supply duct, a cage main exhaust duct, a cage air supply branch pipe, a cage exhaust branch pipe and two cage connecting pipes. The cage main air supply duct and the cage main exhaust duct are arranged on the cage, and the two cage connecting pipes are arranged in independent spaces of the cage. One end of the cage air supply branch pipe is connected to the cage main air supply duct, and the other end is connected to a cage connecting pipe. The cage connecting pipe is connected to an air inlet arranged on the cage box. One end of the cage exhaust branch pipe is connected to the cage main exhaust duct, and the other end is connected to another cage connecting pipe. The other cage connecting pipe is connected to an exhaust outlet arranged on the cage box.

[0014] Preferably, the fan includes a first air supply fan, a second air supply fan, a first exhaust fan and a second exhaust fan. The outlet of the first air supply fan is connected to the inlet of the second air supply fan, the inlet of the first air supply fan is connected to the filter, and the outlet of the second air supply fan is connected to the filter to provide power for the system air supply. The outlet of the first exhaust fan is connected to the inlet of the second exhaust fan, and the outlet of the second exhaust fan is connected to the main exhaust duct to provide power for the system exhaust.

[0015] Preferably, the main unit also includes a primary air supply filter, a high-level air supply filter, a primary exhaust filter and a high-level exhaust filter. The primary air supply filter is arranged at the inlet of the first air supply fan, the high-level air supply filter is arranged at the outlet of the second air supply fan, and the high-level air supply filter is connected to the main air supply duct to filter the air supply for the system; the primary exhaust filter and the high-level exhaust filter are arranged at the inlet of the first exhaust fan in sequence, and the outlet of the second exhaust fan is connected to the main exhaust duct to filter the gas exhausted by the system.

[0016] Compared with the prior art, the technical solution has the following beneficial effects: the utility model adopts an experimental animal IVC system that can clearly indicate whether the cage box is correctly installed on the cage frame. The utility model installs a brightly colored indicator on the cage frame rail. The two ends of the indicator have different weights. The two ends rotate up and down through a rotating shaft. The position of the rotating shaft is close to the light end. Therefore, when the cage box is not installed on the cage frame, the light end of the indicator rises upward and the heavy end sinks. From the front of the cage frame, the brightly colored indicator can be seen. When the cage box is installed on the cage frame, the weight of the cage box applies pressure to the light end of the indicator. Through the rotation of the rotating shaft, the heavy end is lifted up and hidden in the groove of the cage frame rail. From the front of the cage frame, the indicator cannot be seen at all, thereby prompting the operator whether the cage box is correctly installed.

[0017] Furthermore, the host device of the utility model adopts dual fans to supply and exhaust air for the IVC system at the same time. Even if one of the fans fails, the other fan can still provide a stable airflow for the system without stopping for maintenance, so that the system can operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of an IVC system for experimental animals.

[0019] Figure 2 This is another structural schematic diagram of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the host of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the cage frame of the utility model.

[0022] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0023] Figure 6 It is a structural schematic diagram of the cage box installation indicator of the utility model.

[0024] Figure 7 This is a top view of the cage box installation indicator of the utility model.

[0025] Figure 8 It is a structural schematic diagram of the cage box of the utility model.

[0026] Fig. 9 It is a structural schematic diagram of the connection between the cage box and the cage frame of the utility model.

[0027] Fig.10 It is a schematic diagram of the structure of the identification card of the utility model being attached to the cage box.

[0028] Among them: 1, host 2, cage 3, cage box 4, connecting pipe 5, caster 6, alarm light 7, host screen 8, main exhaust duct 9, main air supply duct 10, first air supply fan 11, second air supply fan 12, first exhaust fan 13, second exhaust fan 14, cage main air supply duct 15, cage air supply branch 16, cage main exhaust duct 17, cage exhaust branch 18, air inlet 19, exhaust 20, support plate 21, support plate protrusion 22, left guide rail 23 , right guide rail 24, cage box installation indicator 25, cage frame connecting pipe 26, drinking bottle 27, air supply primary filter 28, air supply advanced filter 29, exhaust primary filter 30, exhaust advanced filter 31, guide rail groove 32, rotating shaft 33, first bottom plate 34, second bottom plate 35, indicator protrusion 36, indicator plate 37, guide rail bottom plate 38, guide rail boss 39, through hole 40, rotating hole 41, support bottom plate 42, support plate boss 43, identification card. DETAILED DESCRIPTION

[0029] Figures 1 to 10 It is the best embodiment of the utility model, and the following Figures 1 to 10 The utility model is further described.

[0030] Reference Figure 1~2 The experimental animal IVC system includes a main unit 1, a cage box 3 and a cage frame 2 with a cage box installation indicator 24. A plurality of independent spaces for placing the cage boxes 3 are arranged on the cage frame 2. A left guide rail 22 and a right guide rail 23 for placing the cage box 3 are respectively arranged on both sides of each independent space. The indicator 24 is rotatably arranged on the right guide rail 23. A cage frame main air supply pipe 14 and a cage frame main exhaust pipe 16 connected to the main unit 1 are arranged on the cage frame 2. A plurality of cage frame supply branch pipes 15 connected to the cage frame main air supply pipe 14 and a plurality of cage frame exhaust branch pipes 17 connected to the cage frame main exhaust pipe 16 are also arranged on the cage frame 2. An air inlet 18 and an air outlet 19 connecting the cage frame supply branch pipe 15 and the cage frame exhaust branch pipe 17 are arranged on the cage box, so that an independent and closed air inlet duct and exhaust duct are formed between the main unit 1 and the cage box 3.

[0031] The host 1 includes casters 5, alarm lights 6, a host screen 7, a main exhaust duct 8 and a main air supply duct 9. The casters 5 are universal casters that can be self-locking, ensuring that the host 1 is conveniently fixed after being installed in place. The alarm lights 6 are used to flash continuously when the host 1 has faults such as unstable pressure difference, large changes in temperature and humidity, and unstable ventilation times, so that the operator can observe the abnormality of the system and avoid the normal life activities of the experimental animals being damaged due to the abnormality of the system. The host screen 7 is a touch screen, and the system parameters such as the ventilation times, pressure difference value, maximum and minimum values ​​of temperature and humidity of the system are set on the host screen 7 for easy operation. The host screen 7 can also realize the function of turning on the screen during the day and turning off the screen at night, ensuring that the life activities of the experimental animals at night are not disturbed by light.

[0032] The cage 2 includes a cage main air supply pipe 14, a cage air supply branch pipe 15, a cage main exhaust pipe 16 and a cage exhaust branch pipe 17. After the main machine 1 works normally, clean air flows from the main air supply pipe 9 into the cage main air supply pipe 14, and then disperses from the cage main air supply 14 to each cage air supply branch pipe 15, which fits tightly with the air inlet 18 of the cage box 3 placed on the cage 2, and the clean air flows into the interior of the cage box 3 to provide fresh and clean air for the experimental small animals inside.

[0033] The exhaust port 19 of the cage box 3 fits tightly with each cage frame exhaust branch pipe 17 of the cage frame 2. The polluted gas in the cage box 2 flows into the cage frame main exhaust pipe 16 through the exhaust port 19 and the cage frame exhaust branch pipe 17. The cage frame main exhaust pipe 16 is connected to the exhaust filter inside the main unit 1. The polluted air is sucked away by the double exhaust fans and sent to the external exhaust system through the filter.

[0034] Reference Figure 3 One end of the main air supply pipe 9 inside the host 2 is connected to the second air supply fan 11 and the first air supply fan 10 through the air supply high-level filter 28, and the other end of the main air supply pipe 9 is connected to the cage main air supply pipe 14 of the cage 2. The other end of the first air supply fan 10 is connected to the external air supply system to deliver fresh and clean air from the external air supply system to the cage 2 in real time. The second air supply fan 11 is connected end to end with the first air supply fan 10 to provide air for the IVC system. When the system works normally, the second air supply fan 11 and the first air supply fan 10 work at the same time. When one of the two air supply fans is damaged, the host 2 controls to increase the power of the other air supply fan to meet the air volume required by the system.

[0035] One end of the main exhaust duct 8 is connected to the second exhaust fan 13 and the first exhaust fan 12 inside the host, and the other end is connected to the external exhaust system. The other end of the first exhaust fan 12 is connected to the cage main exhaust duct 16 of the cage 2 through the exhaust primary filter 29 and the exhaust advanced filter 30, and the exhaust gas in the cage 2 is extracted and sent to the external exhaust system through the filter. The second exhaust fan 13 and the first exhaust fan 12 are also connected end to end to extract the exhaust gas in the entire IVC system to the external exhaust system. When the system is working normally, the two exhaust fans work at the same time. When one of the exhaust fans is damaged, the host controls the other exhaust fan to increase the power to ensure the normal discharge of the exhaust gas inside the system.

[0036] Reference Figure 4 A plurality of independent spaces for placing cage boxes 3 are arranged on the cage frame 2, with one cage box 3 placed in each independent space. A left guide rail 22 is arranged on the left side of each independent space, and a right guide rail 23 is arranged on the right side. A rotating cage box installation indicator 24 is arranged on the right guide rail 23, and two cage frame connecting pipes 25 connected to the cage frame exhaust branch pipe 17 and the cage frame air supply branch pipe 15 are arranged on the rear side.

[0037] Reference Figure 5 The guide rail on either side includes a guide rail base plate 37 and guide rail bosses 38 arranged on both sides of the guide rail base plate 37. The upper and lower parts of the guide rail bosses 38 are symmetrically arranged on the guide rail base plate 37. A guide rail groove 31 is arranged on the upper part of the guide rail boss 38. A through hole 39 is arranged on the horizontal plate of the guide rail base plate 37 of the right guide rail 23, and a rotating hole 40 is arranged on the side plate of the guide rail base plate 37.

[0038] Reference Figures 6 and 7 The cage box installation indicator 24 includes a rotating shaft 32, a first bottom plate 33, a second bottom plate 34, an indicator protrusion 35 and an indicator plate 36. The first bottom plate 33 is a triangular plate vertically arranged on one side of the rotating shaft 32, and the second bottom plate 34 is a rectangular plate horizontally arranged on the other side of the rotating shaft 32. A reinforcing rib connected to the rotating shaft 32 is arranged on the upper side of the second bottom plate 34, and a reinforcing plate connected to the first bottom plate 33 is arranged on the lower side. The reinforcing plate is a triangular plate with a gradually increasing height from the rotating shaft 32 to the tail end of the second bottom plate 34. The indicator plate 36 connects the second bottom plate 34 and the reinforcing plate. The weight of the first bottom plate 33 is lighter than that of the second bottom plate 34. The indicator protrusion 35 is arranged on the upper side of the first bottom plate 33. When the cage box installation indicator 24 rotates through the rotating shaft 32, the second bottom plate 34 is lifted upward by force, and the indicator plate 36 will be completely blocked by the right guide rail 23.

[0039] The rotating shaft 32 is arranged in the rotating hole 40, and the indicator protrusion 35 passes through the through hole 39. The material of the indicator 24 is a brightly colored plastic. When the cage box 3 is not placed on the guide rail, the indicator protrusion 35 passes through the through hole 39, and the second bottom plate 34 is lower than the guide rail boss 38 of the right guide rail 23. When observed from the front of the cage frame 2, the cage box installation indicator 24 can be clearly seen.

[0040] Reference Figures 8-10 , support plates 20 are arranged on both sides of the cage box 3, and the support plates 20 include a support plate bottom plate 41 and support plate bosses 42 arranged on both sides of the support plate bottom plate 41, and support plate protrusions 21 are arranged on the lower side of the support plate bosses 42. The support plates 20 are arranged on the left and right sides of the cage box 3, and cooperate with the left guide rail 22 and the right guide rail 23 of the cage frame 2 to play a supporting role. Specifically, the cage box 3 is placed on the guide rail, so that the two support plate bosses 42 of the cage box 3 are placed at both ends of the guide rail, and a downward force is applied to the cage box 3, the support plate bottom plate 41 is fitted with the guide rail bottom plate 37, and the support plate protrusion 21 is engaged with the guide rail groove 31, so that the cage box 3 is fixed on the cage frame 2.

[0041] When the support plate bottom plate 41 is in contact with the guide rail bottom plate 37, the extended indicator protrusion 35 is subjected to downward pressure, the indicator 24 rotates, the second bottom plate 34 is lifted upward, and is blocked by the guide rail boss 38, and the cage box installation indicator 24 cannot be seen from the front of the cage frame 2, thereby prompting the operator to place the cage box 3 correctly. If the cage box installation indicator 24 can be seen, it means that the cage box 3 is not correctly placed and needs to be re-placed, so as to ensure that the cage box 3 is stably installed on the cage frame 2.

[0042] The cage box 3 also includes an air inlet 18, an air outlet 19 and a drinking water bottle 26. The air inlet 18 delivers fresh and clean air to the experimental animals, and the air outlet 19 discharges the waste gas inside the cage box 3.

[0043] The drinking bottle 26 provides water for the experimental small animals to ensure the normal life activities of the experimental small animals. The cage box 3 is made of polyphenylene sulfone resin PPSU, which has stable performance and can withstand high temperature and high pressure sterilization, effectively increasing the service life of the cage box 3.

[0044] Two cage connecting pipes 25 are arranged on the rear side of each independent space on the cage frame 2. One end of the two cage connecting pipes 25 is respectively connected to the cage frame air supply branch pipe 15 and the cage frame exhaust branch pipe 17, and the other end is respectively connected to the air inlet 18 and the exhaust port 19 on the cage box 3. The cage connecting pipes 25 are made of silicone material, which can withstand high temperature and high pressure sterilization and acid and alkali corrosion. When the room is disinfected, it can be ensured that it will not be corroded by the disinfectant.

[0045] A card slot is also provided on the front side of the cage 3. A buckle is provided on the upper end of an identification card 43 for marking the vital signs of the experimental animals. The buckle cooperates with the card slot, and the identification card 43 is hung on the front side of the cage 3. When it is necessary to observe the experimental animals in the cage 3, the identification card 43 is flipped over, the card slot clamps the buckle, and the identification card 43 is fixed, which is convenient for the operator to observe.

[0046] The working process is as follows: before the host 1 works, the cage box 3 is correctly placed on the cage frame 2, and the initial vital signs are marked on the respective identification cards 43. Then the host 1 is powered on, and the functional parameters of the system are set on the host screen 7. The first air intake fan 10 and the second air supply fan 11 inside the host 1 work simultaneously, and the fresh and clean air is delivered to the cage frame main air supply pipe 14 through the main air supply pipe 9 and the connecting pipe 4, and then the air enters the interior of the cage box 3 through the cage frame air supply branch pipe 15, the cage frame connecting pipe 25, and the air inlet 18; and the exhaust gas in the cage box 3 finally enters the cage frame main exhaust pipe 16 through the exhaust port 19, the cage frame connecting pipe 25, and the cage frame exhaust branch pipe 17. The connecting pipe 4 connects the second exhaust fan 13 and the first exhaust fan 12 inside the host 1. The two exhaust fans work simultaneously to extract the exhaust gas in the cage frame main exhaust pipe 16, and finally exhaust it to the outside through the exhaust system, thereby ensuring the normal life activities of the experimental small animals.

[0047] During the experiment, the identification card 43 can be rotated to observe the vital signs of the experimental animals in the cage 3 .

[0048] The air supply and exhaust ducts are sealed and connected, and the dual motors work simultaneously, ensuring that the internal pressure of the cage is 10Pa positive pressure. Maintaining a positive pressure of 10Pa in cage 3 can effectively ensure a clean environment inside cage 3, prevent harmful microorganisms and particles from entering the cage and polluting the environment, and avoid the risk of cross-infection of experimental animals in the cage.

[0049] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. An IVC system for experimental animals, characterized in that: The invention comprises a main machine (1), a cage box (3) and a cage frame (2), wherein a plurality of independent spaces for placing the cage boxes (3) are arranged on the cage frame (2), a circulating air supply mechanism for supplying air to the cage boxes (3) is provided between the main machine (1) and the cage frame (2), guide rails for placing the cage boxes (3) are provided on both sides of each independent space, and at least one guide rail is provided with a cage box installation indicator mark (24); The cage box installation indicator (24) is rotatably connected to the guide rail, one end of the cage box installation indicator (24) extends upward to the upper side of the guide rail, and the other end is provided with a position indicator, which is arranged on the lower side of the guide rail, and the center of gravity of the cage box installation indicator (24) is located on the side of its rotation axis close to the position indicator.

2. An experimental animal IVC system according to claim 1, characterized in that: The cage box installation indicator (24) comprises a rotating shaft (32), a first bottom plate (33), a second bottom plate (34) and an indicator protrusion (35); the rotating shaft (32) is rotatably connected to the guide rail; the first bottom plate (33) and the second bottom plate (34) are respectively arranged on both sides of the rotating shaft (32); the indicator protrusion (35) is arranged on the upper side of the first bottom plate (33) and extends upward to the upper side of the guide rail; the position indicator is an indicator plate (36) arranged on the second bottom plate (34); and the center of gravity of the cage box installation indicator (24) is located on the second bottom plate (34).

3. An experimental animal IVC system according to claim 2, characterized in that: The guide rail comprises a guide rail base plate (37) and guide rail bosses (38) arranged on both sides of the guide rail base plate (37). A through hole (39) is arranged on the guide rail base plate (37), and the indicator protrusion (35) passes through the through hole (39) upwards.

4. An experimental animal IVC system according to claim 3, characterized in that: The upper and lower parts of the guide rail boss (38) are symmetrically arranged on the guide rail bottom plate (37); the upper guide rail boss (38) is provided with a guide rail groove (31); support plates (20) are respectively provided on both sides of the cage box (3); the support plate (20) comprises a support plate bottom plate (41) and support plate bosses (42) provided on both sides of the support plate bottom plate (41); a support plate protrusion (21) is provided on the lower side of the support plate boss (42); and the support plate protrusion (21) is provided in the guide rail groove (31).

5. The experimental animal IVC system according to claim 1, characterized in that: The circulating air supply mechanism comprises a fan, a cage frame main air supply pipe (14), a cage frame main exhaust pipe (16), a cage frame air supply branch pipe (15), a cage frame exhaust branch pipe (17) and two cage frame connecting pipes (25). The cage frame main air supply pipe (14) and the cage frame main exhaust pipe (16) are arranged on the cage frame (2). The two cage frame connecting pipes (25) are arranged in an independent space of the cage frame (2). One end of the cage frame air supply branch pipe (15) is connected to the cage frame main air supply pipe (14), and the other end is connected to a cage frame connecting pipe (25). The cage frame connecting pipe (25) is connected to an air inlet (18) arranged on the cage box (3). One end of the cage frame exhaust branch pipe (17) is connected to the cage frame main exhaust pipe (16), and the other end is connected to another cage frame connecting pipe (25). The other cage frame connecting pipe (25) is connected to an exhaust port (19) arranged on the cage box (3).

6. An experimental animal IVC system according to claim 5, characterized in that: The fan comprises a first air supply fan (10), a second air supply fan (11), a first exhaust fan (12) and a second exhaust fan (13); the outlet of the first air supply fan (10) is connected to the inlet of the second air supply fan (11); the inlet of the first air supply fan (10) is connected to a filter; the outlet of the second air supply fan (11) is connected to the filter, so as to provide power for air supply to the system; the outlet of the first exhaust fan (12) is connected to the inlet of the second exhaust fan (13); the outlet of the second exhaust fan (13) is connected to a main exhaust duct (8), so as to provide power for exhausting the system.

7. An experimental animal IVC system according to claim 1, characterized in that: The host (1) further comprises a primary air supply filter (27), a high-level air supply filter (28), a primary exhaust air filter (29) and a high-level exhaust air filter (30); the primary air supply filter (27) is arranged at the inlet of the first air supply fan (10), the high-level air supply filter (28) is arranged at the outlet of the second air supply fan (11), and the high-level air supply filter (28) is connected to the main air supply pipe (9) to filter and supply air to the system; the primary exhaust air filter (29) and the high-level exhaust air filter (30) are arranged at the inlet of the first exhaust air fan (12) in sequence, and the outlet of the second exhaust air fan (13) is connected to the main exhaust air pipe (8) to filter the gas discharged from the system.

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