A ventilation device suitable for raising SPF-level experimental animals

Abstract

The present invention discloses a ventilation device suitable for raising SPF-level experimental animal equipment, the ventilation device comprises a ventilation panel, a plurality of vents provided on the ventilation panel, and an air volume adjustment plate provided on the ventilation panel by rotating a shaft, the air volume adjustment plate is provided with openings corresponding to the vents one by one, and when the openings and the vents at least partially overlap, a ventilation channel for airflow is formed; the micro-barrier environment experimental animal raising equipment comprises the ventilation device. The ventilation device suitable for raising SPF-level experimental animal equipment of the present invention forms a ventilation channel for airflow by rotating the air volume adjustment plate so that the openings and the vents at least partially overlap, so that the size of the ventilation channel can be adjusted by rotating the air volume adjustment plate to adjust the airflow of different cross-sectional areas to control the air volume, and the air volume can be easily controlled.

Description

Technical Field

[0001] The invention relates to the technical field of experimental animals, and in particular to a ventilation device suitable for equipment for raising SPF-level experimental animals and a micro-barrier environment experimental animal raising device with the ventilation device. Background Art

[0002] In the prior art, experimental animal breeding equipment usually includes a breeding box, a cage placed in the breeding box, multi-layer and multi-row cages placed in the cage, an air supply device, an air return device, a temperature and humidity monitoring device, etc. The indoor air is filtered and enters the cage and cage through the air supply duct of the air supply device, and the exhaust gas discharged by the animals is quickly discharged out of the breeding box through the return air duct of the return air device.

[0003] However, depending on the number of experimental animals in the breeding equipment and their growth conditions, the ventilation volume in the breeding box also changes to a certain extent. However, the ventilation volume in the breeding box is currently generally determined by the size of the duct in the air supply device or the return air device, and the air volume cannot be controlled. Summary of the invention

[0004] In view of this, in order to solve the problems of the prior art, the present invention provides an improved ventilation device suitable for equipment for raising SPF-level experimental animals, which can conveniently control the size of the air volume.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A ventilation device suitable for raising SPF-level experimental animal equipment, comprising a ventilation panel, a plurality of ventilation ports provided on the ventilation panel, and an air volume adjustment plate provided on the ventilation panel by rotating a shaft, wherein the air volume adjustment plate is provided with openings corresponding to the ventilation ports one by one, and when the openings and the ventilation ports at least partially overlap, a ventilation channel for airflow to pass through is formed. The ventilation panel is configured to have a structure with a plurality of ventilation ports, and the air volume adjustment plate is provided with openings corresponding to the ventilation ports one by one, and the air volume adjustment plate is rotated so that the openings and the ventilation ports at least partially overlap to form a ventilation channel for airflow to pass through, so that the size of the ventilation channel can be adjusted by rotating the air volume adjustment plate to adjust the airflow of different cross-sectional areas to control the air volume.

[0007] In the above technical solution, preferably, the plurality of vents are evenly distributed on the same circumference, and the center of the circle corresponding to the circumference is located on the rotating shaft. The vents are evenly distributed on the same circumference, and the center of the circle corresponding to the circumference is located on the rotating shaft, so that when the air volume adjustment plate is rotated, the opening and the vent are partially overlapped to adjust the size of the ventilation duct to adjust the air volume.

[0008] In the above technical solution, it is further preferred that the size of the opening is exactly the same as that of the vent and the two can completely overlap so that the ventilation channel is fully opened. The opening is exactly the same as the vent, and when the air volume adjustment plate is rotated, the opening and the vent can completely overlap, and at this time the ventilation duct is fully opened and the air volume reaches the maximum.

[0009] In the above technical solution, it is further preferred that the vent is in a fan-shaped ring shape, and a windshield is formed between two adjacent openings, and the windshield is exactly the same as the opening, and the windshield can completely overlap with the vent to close the ventilation channel. The vent is designed to be fan-shaped, with two parallel arc surfaces, which is convenient for cooperating with the rotating air volume adjustment plate to make the vent coincide with the opening, and the windshield is exactly the same as the opening. Therefore, the vent, the opening and the windshield are all of the same fan-shaped structure. During the rotation of the air volume adjustment plate, the windshield can completely overlap with the vent, and the opening and the connecting surface between the two vents on the ventilation panel can overlap with each other, so that the ventilation channel can be closed, that is, the air volume is minimized. Therefore, such a design can make the ventilation duct freely switch between fully open, closed and partially open.

[0010] In the above technical solution, it is further preferred that a positioning bar for fully opening, closing or partially opening the ventilation channel is provided on one side of at least one of the windshield surfaces, the positioning bar extends into the ventilation opening and the positioning bar is arranged perpendicular to the ventilation panel. A positioning bar is provided on one side of the fan annular opening, and the positioning bar extends into the ventilation opening, and the positioning bar can be positioned at any position in the ventilation opening, so that the ventilation channel is fully opened, closed or partially opened to adjust the amount of air.

[0011] In the above technical solution, it is further preferred that the length of the positioning strip is less than or equal to the length of the side. The length of the positioning strip is less than or equal to the length of the side, and its unit function can be achieved to adjust the size of the ventilation channel and adjust the air volume.

[0012] In the above technical solution, and further preferably, the air volume adjusting plate is arranged on one side of the ventilation panel, the edge of the ventilation panel extends toward the side away from the air volume adjusting plate to form a ventilation panel side panel, and a filter is arranged on the side of the ventilation panel away from the air volume adjusting plate.

[0013] In the above technical solution, it is further preferred that the ventilation panel side plate is provided with a slot for clamping the edge of the filter screen. The ventilation panel side plate is provided with a slot to firmly fix the filter screen.

[0014] In the above technical solution, it is further preferred that the ventilation panel is square, the ventilation panel side panels include four side panels connected in sequence, at least one of the side panels is provided with a slot, and at least one of the remaining side panels is provided with the slot. The ventilation panel is set to be square, and one side panel is provided with a slot to facilitate the placement and removal of the filter.

[0015] The present invention also provides a micro-barrier environment experimental animal breeding equipment, comprising the ventilation device described in any of the above technical solutions. Since the micro-barrier environment experimental animal breeding equipment is equipped with the above ventilation device, the ventilation volume in the air supply system or the return air device can be controlled to adjust the air volume.

[0016] Compared with the prior art, the present invention is beneficial in that: the ventilation device of the present invention is suitable for raising SPF-level experimental animal equipment, the ventilation panel is set to a structure with multiple ventilation holes, and an air volume adjustment plate with openings corresponding to the ventilation holes is also set, and the air volume adjustment plate is rotated to make the openings overlap with the ventilation holes at least partially to form a ventilation channel for air flow to pass through, so that the size of the ventilation channel can be adjusted by rotating the air volume adjustment plate to adjust the air flow of different cross-sectional areas to control the air volume. The micro-barrier environment experimental animal raising equipment of the present invention can control the ventilation volume in the air supply system or the return air system and adjust its air volume because the above-mentioned ventilation device is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a micro-barrier environment experimental animal breeding device from a first perspective according to a preferred embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a second viewing angle of a micro-barrier environment experimental animal breeding device according to a preferred embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the micro-barrier environment experimental animal breeding equipment from a third perspective according to a preferred embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the frame structure of the feeding box body of the micro-barrier environment experimental animal feeding equipment according to a preferred embodiment of the present invention;

[0022] Figure 5 for Figure 4 A magnified view of point B;

[0023] Figure 6 A front view of a micro-barrier environment experimental animal breeding device according to a preferred embodiment of the present invention;

[0024] Figure 7 for Figure 6 BB cross-sectional view;

[0025] Figure 8 for Figure 7 A magnified image of point A;

[0026] Fig. 9 This is a schematic diagram of the structure of the ventilation device in the micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a fully open state);

[0027] Fig.10 A front view of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a fully open state);

[0028] Fig.11 A front view of an air volume adjustment plate of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention;

[0029] Fig.12 This is a structural schematic diagram of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a partially open state);

[0030] Fig.13 A front view of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a partially open state);

[0031] Fig.14 This is a structural schematic diagram of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a closed state);

[0032] Fig.15 A front view of a ventilation device in a micro-barrier environment experimental animal breeding equipment according to a preferred embodiment of the present invention (the ventilation channel is in a closed state);

[0033] Wherein: breeding box body 100, frame structure 101, body frame 102, column 103, opening 104, wide vertical board 105, narrow vertical board 106, column wind plate 107, air supply hole 108, top plate 109, bottom plate 110, double door plate 111, first inner frame 112, first outer frame 113, first sealing strip 114, first inner horizontal plane 115, first outer horizontal plane 116, first vertical plane 117, second sealing strip 118, third sealing strip 119, glass door plate 121, second inner frame 122, second outer frame 123, fourth sealing strip 124, fifth sealing strip 125, sixth sealing strip 126, 126, second outer horizontal surface -127, second vertical portion -128, cage -130, mainframe box -131, cover -132, movable roller -133, air supply device -200, air supply outlet -201, air supply fan -202, static pressure box -203, air supply duct -204, air supply slot -205, return air device -300, return air outlet -301, ventilation device -302, return air box upper cover 303, return air fan -304, ventilation panel -400, ventilation outlet -401, ventilation panel side panel -402, slot -403, slot -404, rotating shaft -500, air volume adjustment plate -600, fan ring opening -601, wind shield surface -602, positioning baffle -603. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0035] This embodiment provides an SPF-level micro-barrier environment experimental animal breeding equipment, see Figure 1 to Figure 3 , including a breeding box body 100, the breeding box body 100 is a box structure, the box structure includes a frame structure 101, about the structure of the frame structure 101, combined with Figure 4 and Figure 5The frame structure 101 includes a main body frame 102 . The main body frame 102 is in a rectangular shape. The main body frame 102 includes four columns 103 . The sides of the main body frame 102 are formed between two adjacent columns 103 . The column 103 is set as a hollow structure, and the upper end of the column 103 has an opening 104 for air intake. The column 103 includes two adjacent wide vertical plates 105, narrow vertical plates 106 respectively arranged adjacent to each wide vertical plate 105, and a column air plate 107 arranged between two adjacent narrow vertical plates 106. The two wide vertical plates 105 are perpendicular to each other, and the wide vertical plates 105 and the adjacent narrow vertical plates 106 are perpendicular to each other. The two wide vertical plates 105 face the outside of the main body frame 102, and the two narrow vertical plates 106 and the column air plate 107 face the inside of the main body frame 102. The column air plate 107 is provided with a plurality of air supply holes 108 for supplying air to the inside of the main body frame 102. The air supply holes 108 are long strips, and two rows are arranged along the extension direction of the column air plate 107. The two rows of air supply holes are alternately arranged to discharge air more evenly, as shown in Figure 5. Of course, in other embodiments, any shape such as an ellipse, a triangle, or a circle can also be selected.

[0036] The breeding box body 100 includes the frame structure 101, a top plate 109 disposed on the top surface of the body frame 102 of the frame structure 101, a bottom plate 110 disposed on the bottom surface of the body frame 102, and a side plate assembly disposed on the side of the body frame 102. An air supply device 200 is disposed above the top plate 109, and the air supply device 200 is used to supply air to the opening 104.

[0037] Combination Figure 6 to Figure 8There are four side panel assemblies, which are divided into two groups. Each group of side panel assemblies is arranged relatively to each other and has exactly the same structure. Among them, the side panel assemblies located on the front and rear sides of the feeding box body 100 are double-door structures, which include double-door panels 111, a first inner frame 112 arranged on the periphery of the double-door panels 111, and a first outer frame 113 arranged on the periphery of the first inner frame 112. The two sides of the first outer frame 113 are respectively fixedly connected to the corresponding columns 103, and the first outer frame 113 is provided with a first sealing strip 114 for sealing with the wide vertical plate 105 of the column 103. Among them, the first outer frame 113 includes a first inner horizontal surface 115, a first outer horizontal surface 116 and a first vertical surface 117. The first inner horizontal surface 115 and the first outer horizontal surface 116 are arranged in parallel, and the first vertical surface 117 is arranged perpendicular to the first inner horizontal surface 115 and the first outer horizontal surface 116. The first sealing strip 114 is arranged on the first outer horizontal surface 116. The first inner horizontal surface 115 is provided with a second sealing strip 118 for sealing with the first inner frame 112. The first vertical surface 117 is connected to the narrow vertical plate 106 of the column 103 by fasteners. The first inner frame 112 has a third sealing strip 119 for sealing with the first outer horizontal surface 116. Among them, the side panel components located on the left and right sides of the breeding box body 100 are set as a single door structure, which is generally fixed on the left and right sides of the breeding box body 100 without opening, and is mainly used to seal the frame structure 101, which includes a glass door panel 121, a second inner frame 122 arranged on the periphery of the glass door panel 121, and a second outer frame 123 arranged on the periphery of the second inner frame 122. The sides of the second outer frame 123 are respectively fixedly connected to the corresponding columns 103. The second outer frame 123 is provided with a fourth sealing strip 124 for sealing with the wide vertical plate 105 of the column 103, and a fifth sealing strip 125 and a sixth sealing strip 126 for sealing with the second inner frame 122. The second outer frame 123 includes a second outer horizontal surface 127 and a second vertical portion 128. The fourth sealing strip 124 is arranged on the second outer horizontal surface 127, and the second vertical portion 128 is directly buckled on the narrow vertical plate 106 of the column 103.

[0038] Therefore, the micro-barrier environment experimental animal breeding equipment includes a breeding box body 100, a cage frame 130 for placing cages arranged in the breeding box body 100, and an air supply device 200 and an air return device 300 arranged on the top of the breeding box body 100. The structure of the breeding box body 100 is as described above. By opening the double-opening door panel 111, the cages in the breeding box body 100 can be replaced, and the experimental animals can be tested. The top of the breeding box body 100 is also provided with a mainframe box 131 for installing the air supply device 200, the air return device 300 and various instruments and meters. The frame of the mainframe box 131 is composed of a top plate 109, a cover plate 130, and a mainframe box 131. 2 and the top side panels around, the air supply device 200 and the partial recovery device 300 are installed in the main box body 131, the air supply device 200 and the return air device 300 are used to exchange the air flow inside and outside the breeding box body 100 for ventilation, the cover plate 132 is provided with holes for exposing the air supply port 201 of the air supply device 200 and the return air port 301 of the return air device 300, and various instruments and meters are installed on the outer surface of the top side panel of the main box body 131 for convenient operation. These instruments and meters include voltmeters, differential pressure meters, central circuit boards, power switches, fan controllers, lighting switches, etc., which are the same as the prior art and will not be repeated here. In addition, the bottom of the breeding box body 100 is equipped with a moving roller 133 for the above-mentioned breeding equipment to move.

[0039] The air supply device 200 includes an air supply fan 202 with an air supply port 201, a static pressure box 203 connected to the air supply fan 202, two air supply pipes 204 connected to the static pressure box 203, and an air supply slot 205 arranged on the main frame 131 and connected to the air supply pipe 204. The two air supply slots 205 are arranged on the inner sides of two opposite top side panels and are arranged adjacent to the corresponding top side panels, and the two ends of the air supply slots 205 are against another pair of oppositely arranged top side panels. Therefore, the air supply pipe 204 of the air supply device 200 supplies air to the air supply slots 205 on the corresponding side, and the air supply slots 205 on the corresponding side transmit the wind force to its two ends and then send it into the corresponding column 103, and the external wind then blows to the inside of the breeding box body 100 through the air supply holes 108 in the column 103. It can be seen that in this embodiment, the column 103 is a part of the frame structure of the breeding box body 100 and is arranged as a hollow structure. External wind is directly supplied to the breeding box body 100 through the column 103, and there is no need to set up an air supply duct in the breeding box body 100, thereby saving space.

[0040] Regarding the structure of the return air device 300, the return air device 300 includes a ventilation device 302 located on the inner side of the top plate 109, a return air box upper cover 303 and a return air fan 304 connected to the ventilation device 302 and located in the main box 131, and a return air duct 305 connected to the return air fan 304, and a return air port 301 of the return air duct 305 extends out of the cover plate 132. Figures 9 to 15 The ventilation device 302 includes a square ventilation panel 400 and a disc-shaped air volume adjustment plate 600 which is rotatably arranged on the ventilation panel 400 by a rotating shaft 500. The ventilation panel 400 is provided with 8 fan-shaped vents 401, and the 8 vents 401 are evenly distributed on the same circumference. The center of the circle corresponding to the circumference is located on the rotating shaft 500. The air volume adjustment plate 600 is also provided with 8 fan-shaped openings 601 which are exactly the same as the vents 401. The fan-shaped openings 601 can completely overlap with the vents 401, and a windshield 602 is formed between two adjacent fan-shaped openings 601. The windshield 602 is exactly the same as the fan-shaped openings 601. Therefore, the fan-shaped openings 601 can completely overlap with the vents 401 (that is, the ventilation channel is in a fully open state), partially overlap (that is, the ventilation channel is in a partially open state), and completely do not overlap (that is, the ventilation channel is in a partially open state) by rotating the air volume adjustment plate 600. That is, the ventilation channel is in a closed state), when the fan ring opening 601 and the vent 401 at least partially overlap, a ventilation channel for airflow is formed, so the fan ring opening 601 and the vent 401 completely overlap to fully open the ventilation channel and the air volume reaches the maximum at this time, when the fan ring opening 601 and the vent 401 partially overlap, the ventilation channel is partially opened, and the degree of opening of the ventilation channel is determined according to objective needs, and the wind shield surface 602 completely overlaps with the vent 401 to close the ventilation channel and the air volume is zero. A positioning bar 603 for fully opening, closing or partially opening the ventilation channel is provided on one side of one of the fan ring openings 601, and the positioning bar 603 extends into a vent 401 and is vertically arranged with the ventilation panel 400, and the length of the positioning bar 603 is equal to the length of the side of the fan ring opening 601. The air volume regulating plate 600 is arranged on one side of the ventilation panel 400, and the edge of the ventilation panel 400 extends toward the side away from the air volume regulating plate 600 to form a ventilation panel side panel 402, wherein one of the ventilation panel side panels 402 is provided with a slot 403, and the inner walls of the two ventilation panel side panels 402 adjacent to the ventilation panel side panel 402 with the slot 403 are both provided with a slot 404 extending along the length direction thereof, and a filter is provided on the side of the ventilation panel 400 away from the air volume regulating plate 600, and the filter is directly inserted into the slot 403 and then stuck in the slot 404, so it is very convenient to remove the filter.

[0041] The other structures and working principles of the micro-barrier environment experimental animal breeding equipment of this embodiment are basically the same as those in the prior art and will not be described in detail here.

[0042] The ventilation device for raising SPF-level experimental animal equipment of the present invention, the ventilation panel is set to a structure with multiple ventilation holes, and an air volume adjustment plate with openings corresponding to the ventilation holes is also set, and the air volume adjustment plate is rotated to make the openings overlap with the ventilation holes at least partially to form a ventilation channel for airflow to pass through, so that the size of the ventilation channel can be adjusted by rotating the air volume adjustment plate to adjust the airflow of different cross-sectional areas to control the air volume. The micro-barrier environment experimental animal raising equipment of the present invention, due to the installation of the above-mentioned ventilation device suitable for raising SPF-level experimental animal equipment, can control the ventilation and air exchange volume in the air supply system or the return air system, and adjust its air volume. And the column in the frame structure of the micro-barrier environment experimental animal raising equipment is set to a hollow structure, the upper end of the column has an opening for air intake, and the side wall of the column facing the inside of the body frame is provided with an air supply hole, so the column can be used as a part of the frame structure, and the external wind can supply air to the inside of the frame structure through the column, and there is no need to set an additional air supply duct inside the frame structure, and the frame structure is compact and space-saving. The box structure of the micro-barrier environment experimental animal breeding equipment of the present invention is provided with the above-mentioned frame structure, and an air supply device is provided above it for supplying air to the opening of the column, so that air can be supplied to the inside of the box structure through the column itself, and the volume is small and compact. The micro-barrier environment experimental animal breeding equipment, due to the adoption of the above-mentioned box structure, also has the advantages of simple structure, small volume, using the column as the frame of the box structure, and supplying air to the breeding box through the column itself, and through the dispersed air supply and centralized return air, the internal airflow circulation is more reasonable, which is more conducive to the breeding of experimental animals.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-barrier environment experimental animal breeding equipment, It is characterized in that The invention comprises a feeding box body, a cage frame arranged in the feeding box body for placing cage boxes, an air supply device and an air return device arranged on the top of the feeding box body, The feeding box body comprises a frame structure, the frame structure comprises a body frame, the body frame comprises columns, a side of the body frame is formed between two adjacent columns, the columns are arranged as hollow structures, the upper ends of the columns have openings for air intake, the columns comprise two adjacent wide vertical plates, narrow vertical plates respectively arranged adjacent to each wide vertical plate, and column air plates arranged between two adjacent narrow vertical plates, a plurality of air supply holes are arranged on the column air plates for supplying air to the inside of the body frame, the air supply holes are arranged in two rows along the extension direction of the column air plates, and the two rows of air supply holes are arranged alternately; The feeding box body also includes a side panel assembly arranged on the side of the body frame, and there are four side panel assemblies divided into two groups. Each group of side panel assemblies is arranged relatively to each other and has exactly the same structure. The side panel assemblies located on the front and rear sides of the feeding box body are double-door structures, which include double-door panels, a first inner frame arranged on the periphery of the double-door panels, and a first outer frame arranged on the periphery of the first inner frame. The two sides of the first outer frame are respectively fixedly connected to the corresponding columns. The first outer frame is provided with a first sealing strip for sealing with the wide vertical panel of the column. The first outer frame includes a first inner horizontal plane, a first outer horizontal plane and a first vertical plane. The first inner horizontal plane and the first outer horizontal plane are arranged in parallel, and the first vertical plane is arranged perpendicular to the first inner horizontal plane and the first outer horizontal plane. The first sealing strip is arranged on the first outer horizontal plane, and the first inner horizontal plane is provided with a sealing strip for sealing with the wide vertical plate of the column. A second sealing strip sealed with the first inner frame, the first vertical surface is connected to the narrow vertical plate of the column by a fastener, and the first inner frame is provided with a third sealing strip for sealing with the first outer horizontal surface; the side panel components located on the left and right sides of the feeding box body are arranged as a single door structure, which is used to seal the frame structure, and includes a glass door panel, a second inner frame arranged on the periphery of the glass door panel, and a second outer frame arranged on the periphery of the second inner frame, the side surfaces of the second outer frame are respectively fixedly connected with the corresponding columns, the second outer frame is provided with a fourth sealing strip for sealing with the wide vertical plate of the column, and a fifth sealing strip and a sixth sealing strip for sealing with the second inner frame, the second outer frame includes a second outer horizontal surface and a second vertical portion, the fourth sealing strip is arranged on the second outer horizontal surface, and the second vertical portion is directly buckled on the narrow vertical plate of the column; The return air device includes a ventilation device, which includes a ventilation panel, a plurality of ventilation holes opened on the ventilation panel, and an air volume adjustment plate arranged on the ventilation panel by rotating a rotating shaft, the air volume adjustment plate is provided with openings corresponding to the ventilation holes one by one, and when the openings and the ventilation holes at least partially overlap, a ventilation channel for airflow to pass through is formed.

2. The micro-barrier environment experimental animal breeding equipment according to claim 1, It is characterized in that The plurality of vents are evenly distributed on the same circumference, and the center of the circle corresponding to the circumference is located on the rotating shaft.

3. The micro-barrier environment experimental animal breeding equipment according to claim 2, It is characterized in that The size of the opening is exactly the same as that of the vent and the two can completely overlap so that the ventilation channel is fully opened.

4. The micro-barrier environment experimental animal breeding equipment according to claim 3, It is characterized in that The ventilation opening is in a fan-shaped shape, and a windshield is formed between two adjacent openings. The windshield is completely identical to the opening, and the windshield can completely overlap with the ventilation opening to close the ventilation passage.

5. The micro-barrier environment experimental animal breeding equipment according to claim 4, It is characterized in that A positioning bar for completely opening, closing or partially opening the ventilation passage is arranged on a side edge of at least one of the windshield surfaces. The positioning bar extends into the ventilation opening and is arranged perpendicular to the ventilation panel.

6. The micro-barrier environment experimental animal breeding equipment according to claim 5, It is characterized in that The length of the positioning bar is less than or equal to the length of the side.

7. The micro-barrier environment experimental animal breeding equipment according to claim 6, It is characterized in that The air volume regulating plate is arranged on one side of the ventilation panel, and the edge of the ventilation panel extends to the side away from the air volume regulating plate to form a ventilation panel side plate, and a filter is arranged on the side of the ventilation panel away from the air volume regulating plate.

8. The micro-barrier environment experimental animal breeding equipment according to claim 7, It is characterized in that The ventilation panel side plate is provided with a slot for clamping the edge of the filter screen.

9. The micro-barrier environment experimental animal breeding equipment according to claim 8, It is characterized in that The ventilation panel is square in shape, and the side panels of the ventilation panel include four side panels connected in sequence, at least one of the side panels is provided with a slot, and at least one of the remaining side panels is provided with the slot.

Images