Experimental animal room air treatment device and working method

Abstract

The invention provides an air treatment device for an experimental animal room and a working method, relates to the field of ventilation and air conditioning systems, and aims to solve the problems that a treatment device in a current animal room is inconvenient to install and the cleanliness of an experimental space is damaged by ceiling installation. The unit is of a box-shaped structure, and a bottom plate of the unit is embedded into a ceiling plate and is flush with the ceiling plate; the bottom plate of the unit is made of a plate compatible with the material characteristic of a suspended ceiling plate, so that the unit and the suspended ceiling are integrated, the original suspended ceiling structure does not need to be damaged, and the integrity of the suspended ceiling is kept; in addition, a sealing assembly for sealing the joint of the unit side plate and the suspended ceiling plate isolates a non-purification area above the suspended ceiling from an experiment space below the suspended ceiling, and pollutant leakage caused by structural damage during installation in a traditional suspended ceiling is avoided. The air inlet sucks air from the experiment space below the suspended ceiling, the air is driven by the internal fan section, is sequentially purified by the filtering section and then is sent back to the experiment space through the air outlet, and it is ensured that the purified air only flows in the experiment space and is not interfered by pollutants above the suspended ceiling.

Description

Technical Field

[0001] This invention relates to the field of ventilation and air conditioning systems, and more specifically to an air handling device and its working method for laboratory animal rooms. Background Technology

[0002] Based on the level of air purification control, laboratory animal environments should be divided into general environments, barrier environments, and isolation environments. The indoor air cleanliness level in barrier and isolation environments needs to reach level 7 or higher. Animal husbandry also generates a large amount of odorous gases (such as ammonia, hydrogen sulfide, and volatile organic compounds), which not only affect the health of laboratory animals but may also harm the health of staff and even pollute the surrounding environment. Traditional laboratory animal rooms using open cages generally employ a 100% fresh air direct current air conditioning system. Barrier and isolation environments require a 100% fresh air direct current purification air conditioning system. Animal rooms need to operate 24 hours a day, 365 days a year. Processing a large amount of outdoor fresh air to achieve comfortable indoor temperature and humidity consumes a significant amount of energy and incurs high operating costs. Installing an air purification and odor treatment device with internal circulation within the animal room, supplementing the 100% fresh air system to meet the above requirements, can significantly reduce the amount of fresh air needed, thereby significantly reducing energy consumption and lowering operating costs.

[0003] Internal circulation air purification and odor control devices are currently available in ceiling-mounted, wall-mounted, and floor-mounted unit types. Achieving good air filtration and odor control requires a larger unit size. Floor-mounted units occupy indoor floor space, affecting the layout of indoor facilities; wall-mounted units, due to size limitations, have less than ideal filtration and purification effects and efficiency. In animal rooms, ceilings conceal pipes and wiring above, and installing the device within the ceiling would compromise its integrity, or require partial ceiling removal to relocate the installation. The space above the ceiling is typically not a purification control area and contains dust, condensate from pipes, construction debris, and other pollutants. Damage to the ceiling's integrity during installation prevents proper isolation between the space above and below the ceiling. During operation, leaking airflow and vibrations can disturb the pollutants above the ceiling, allowing them to pass through the damaged area and enter the experimental space below, compromising the cleanliness of the experimental environment.

[0004] In addition, installing the unit inside the ceiling is difficult and inconvenient because the filter purification module needs to be replaced frequently. At the same time, in order to meet the requirements for replacing the filter module and maintenance, an access panel needs to be opened in the ceiling, which is very detrimental to ensuring the airtightness of the room and maintaining the cleanliness of the room. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an air handling device and its operating method for laboratory animal housing. The unit has a box-type structure, with its base plate embedded in and flush with the ceiling panel. The base plate is made of a material compatible with the ceiling panel, achieving integrated integration of the unit and the ceiling without damaging the original ceiling structure, thus maintaining the integrity of the ceiling. Furthermore, the sealing components at the joints between the side panels and the ceiling panel completely isolate the non-cleaned area above the ceiling (containing dust, impurities, and other pollutants) from the experimental space below, avoiding pollutant leakage caused by structural damage in traditional ceiling-mounted installations. Air is drawn in from the experimental space below the ceiling through the air inlet, driven by an internal fan section, and purified sequentially through a filter section before being returned to the experimental space through the air outlet, forming a closed internal circulation system that ensures the purified air circulates only within the experimental space.

[0006] The first objective of this invention is to provide an air treatment device for laboratory animal rooms, which adopts the following solution: The unit includes a box-type structure with its base plate embedded in and flush with the ceiling panel. The base plate and side panels are made of materials compatible with the ceiling panel. The base plate has spaced air inlets and outlets. Inside the unit, there are air inlet sections, fan sections, filter sections, and outlet sections between the air inlets and outlets. The joint between the side panels and the embedded ceiling panel is sealed with a sealing component, isolating the space above the ceiling panel from the space below it.

[0007] Furthermore, the sealing assembly includes a groove plate and a sealing strip, the groove plate being embedded in the joint between the unit side plate and the ceiling plate, and the sealing strip being distributed along the joint in the circumferential direction of the unit.

[0008] Furthermore, the slot plate is fixed to the side plate of the unit, and the joint at the embedded position of the slot plate is filled with sealant.

[0009] Furthermore, the sealing strip is a rounded corner strip or a channel steel, with the side of the sealing strip attached to and fixed to the side plate of the unit, and the bottom attached to and fixed to the top surface of the ceiling panel.

[0010] Furthermore, an inspection port is provided on the unit base plate between the air inlet and the air outlet, and an inspection door is installed and fitted on the inspection port.

[0011] Furthermore, the filter section includes a first odor removal filter section, a second odor removal filter section, and an air filter section arranged in sequence, with the access port located between the first and second odor removal filter sections.

[0012] Furthermore, both the air inlet and outlet are louvered air vents, and the external casing of the unit is isolated from the space above the ceiling panel.

[0013] Furthermore, the unit is connected to a spring hanger via a suspension rod, and the spring hanger is fixed to the roof with expansion bolts, so that the unit is suspended below the roof.

[0014] A second objective of the present invention is to provide a method of operating an air handling device for a laboratory animal facility, comprising the following: Air in the experimental space below the ceiling enters the device through the air inlet on the base plate of the unit, is guided to the fan section through the air intake section, and flows to the filter section under the power of the fan to complete air purification and odor treatment. The treated clean air is guided through the air outlet section and sent back to the experimental space below the ceiling from the air outlet on the base plate of the unit, forming an internal air circulation. Due to the sealed and isolated design of the unit and the ceiling panel, there is no air exchange between the upper and lower spaces of the ceiling, ensuring that the circulating air always flows within the experimental space and guaranteeing a stable purification effect.

[0015] Furthermore, an inspection port is opened on the unit base plate below the filtration section, through which the filter media of the filtration section can be replaced.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: To address the current issues of inconvenient installation of treatment devices in animal facilities and the compromise of cleanliness in experimental spaces caused by ceiling installation, the unit features a box-type structure. The unit's base plate is embedded in and flush with the ceiling panel. The base plate uses a material compatible with the ceiling panel, achieving seamless integration between the unit and the ceiling without damaging the original ceiling structure, thus maintaining the ceiling's integrity. Furthermore, the sealing components at the joints between the unit's side panels and the ceiling panel completely isolate the non-cleaned area above the ceiling (containing dust, impurities, and other contaminants) from the experimental space below, preventing contaminant leakage caused by structural damage in traditional ceiling installations. Air is drawn in from the experimental space below the ceiling through the inlet, driven by an internal fan section, and purified sequentially through a filter section before being returned to the experimental space through the outlet, forming a closed-loop internal circulation. This ensures that the purified air circulates only within the experimental space, unaffected by contaminants above the ceiling.

[0017] Because the side panels and base plate of the unit are made of the same material as the ceiling, the connection and sealing of both are easier during installation. The compatible material properties of the side panels and base plate, similar to the ceiling, allow for a better fit during connection, reducing installation gaps and effectively ensuring a tight seal between the unit and the ceiling. This prevents unfiltered air from entering the animal room through gaps, ensuring that the air cleanliness inside the animal room meets the required standards and satisfies the stringent environmental requirements of laboratory animals.

[0018] The sealing assembly employs a multi-layered protective design. The grooved plate is embedded within the joint, physically filling and reducing the gap volume, while also serving as the installation base for the sealing strip. The sealant fills the gap between the grooved plate and the joint, forming the first chemical sealing barrier to block gas permeation paths. The rounded corner strip utilizes its arc structure to fit the inside corner joint between the unit's side panel and the ceiling panel. The channel steel increases the connection strength between the ceiling panel and the unit's side panel. Through mechanical fixing, the side of the strip is attached to the unit's side panel, and the bottom is attached to the ceiling panel, forming a second physical seal. Its arc design can disperse stress at the joint, preventing seal failure caused by slight unit displacement. The multi-layered sealing works synergistically to eliminate the risk of leakage at the joint between the unit's side panel and the ceiling panel, ensuring that contaminants above the ceiling cannot enter the experimental space through gaps.

[0019] The access panel is located between the first and second odor removal filter sections, corresponding to the core consumables area. Opening the access panel allows direct access to the filter module without removing the ceiling or entering the area above the ceiling, thus solving the problem of difficult installation and maintenance within traditional ceilings. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a schematic diagram of an air treatment device for an experimental animal room in one or more embodiments of the present invention.

[0022] Figure 2 This is a top view schematic diagram of the air treatment device for an experimental animal room in one or more embodiments of the present invention.

[0023] Figure 3 This is a bottom view schematic diagram of the air treatment device for an experimental animal room in one or more embodiments of the present invention.

[0024] Figure 4 This is a schematic diagram of the air handling device arranged in the animal room in one or more embodiments of the present invention.

[0025] Figure 5 This is a schematic diagram of an air treatment device installed in an animal room according to one or more embodiments of the present invention.

[0026] Figure 6 This is a schematic diagram of a boom in one or more embodiments of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of the hanger rod and spring hanger in one or more embodiments of the present invention.

[0028] Figure 8This is a schematic diagram showing the joint position of the unit side panel and ceiling panel in one or more embodiments of the present invention.

[0029] The components are as follows: 1. Unit; 2. Air inlet section; 3. Fan section; 4. First odor removal filter section; 5. Second odor removal filter section; 6. Air filter section; 7. Air outlet section; 8. Air inlet; 9. Inspection port; 10. Air outlet; 11. Ceiling panel; 12. Roof; 13. Unit base plate; 14. Hanger rod; 15. Spring hanger; 16. Nut; 17. Unit side plate; 18. Sealing strip; 19. Groove plate; 20. Sealant. Detailed Implementation

[0030] Example 1 In a typical embodiment of the present invention, such as Figures 1-8 As shown, an air handling device for an experimental animal facility is presented.

[0031] Existing internal circulation air purification and odor treatment devices present contradictions in their application in laboratory animal rooms. To ensure filtration and purification effects, a larger unit size is required, but floor-mounted installation occupies floor space, and wall-mounted installation is limited by size and ineffective. Ceiling-mounted installation damages the ceiling structure, allowing contaminants (dust, condensate, construction debris, etc.) from non-purified areas above the ceiling to enter the laboratory space below, compromising the cleanliness of the experimental environment. It is difficult to guarantee the purification effect of unit 1 without occupying floor and wall space, and to avoid the damage to the cleanliness of the experimental space caused by ceiling installation. Therefore, this embodiment provides an air handling device for laboratory animal rooms. The unit's base plate 13 is embedded in and flush with the ceiling panel 11. The base plate 13 uses a material compatible with the ceiling panel 11, achieving integrated integration of unit 1 and the ceiling without damaging the original ceiling structure, maintaining the integrity of the ceiling. Simultaneously, the embedded location is sealed, isolating the space above the ceiling from the experimental space below.

[0032] like Figures 1-8 As shown, the main body of the air handling unit for the experimental animal facility is a box-shaped unit 1. The unit's base plate 13 is embedded in and flush with the ceiling panel 11. The unit's base plate 13 and side plates 17 are made of materials compatible with the ceiling panel 11, achieving integrated integration of the unit 1 and the ceiling without damaging the original ceiling structure. In this embodiment, the ceiling panel 11 of the animal facility is usually made of color steel plate. In this embodiment, the corresponding unit's base plate 13 and side plates 17 are made of color steel plate or stainless steel plate.

[0033] The ceiling panel 11 of the animal room is typically made of color steel plate. The frame of unit 1 is compatible with the material used, such as color steel plate or stainless steel plate, so that unit 1 and ceiling panel 11 are similar in material, achieving better integration in terms of both appearance and structure. This allows unit 1 to blend naturally into the overall decoration style of the animal room, avoiding the jarring feeling caused by excessive material differences, ensuring the aesthetics and integrity of the ceiling area, and meeting the basic requirements of cleanliness and uniformity for the experimental animal room.

[0034] Laboratory animal facilities require well-planned space to meet the needs of animal husbandry and experimental operations. The unit's base plate 13 is directly integrated into the ceiling, eliminating the need for additional ceiling materials to cover the bottom of unit 1, and also eliminating the need for unit 1 to occupy separate floor or wall space, thus fully utilizing the space above the ceiling. This avoids the problems of floor-mounted installation occupying valuable floor space and affecting the layout of animal facilities, and also solves the space limitations that wall-mounted installation might bring, allowing for more efficient use of space within the animal facility.

[0035] Because the side panels 17, base plate 13, and ceiling panel 11 are made of compatible materials, their connection and sealing are easier during installation. This material compatibility ensures a better fit during connection, reducing installation gaps. The structural design of the connection points between the side panels 17 and ceiling panel 11 effectively guarantees the airtightness of the connection between the unit 1 and the ceiling steel plate, preventing unfiltered air from entering the animal room through gaps and ensuring that the air cleanliness within the animal room meets requirements, such as a barrier environment and isolation environment level of 7 or higher, satisfying the stringent environmental requirements of laboratory animals.

[0036] Color-coated steel sheets have good corrosion resistance and are easy to clean, making them suitable for places like laboratory animal facilities where high levels of environmental cleanliness are required. Purification unit 1 is made of color-coated steel sheets or stainless steel, facilitating daily cleaning and maintenance. This reduces the growth and residue of bacteria and contaminants on the surface of unit 1. Furthermore, for the high concentrations of ammonia and hydrogen sulfide in animal facilities, the use of stainless steel in purification unit 1 provides better corrosion resistance, helping to maintain a hygienic environment within the animal facility, protecting the health and welfare of laboratory animals, and reducing the risk of harm to the health of staff.

[0037] The unit's base plate 13 has spaced air inlets 8 and outlets 10. Inside, along the airflow path, an air inlet section 2, a fan section 3, a filter section, and an outlet section 7 are arranged sequentially to form a complete air handling process. The joint between the unit's side plate 17 and the ceiling plate 11 is sealed with a sealing component to isolate the space above the ceiling from the experimental space below.

[0038] The unit's base plate 13 is directly embedded in the ceiling panel 11, eliminating the need to remove or damage the ceiling and maintaining its integrity. Furthermore, the sealing components at the joint between the unit's side panel 17 and the ceiling panel 11 completely isolate the non-cleaned area above the ceiling from the experimental space below, preventing pollutant leakage caused by structural damage during traditional ceiling installations. Air inlet 8 draws in air from the experimental space below the ceiling, which, driven by the internal fan section 3, is purified through the filter section before being returned to the experimental space via outlet 10, forming a closed internal circulation. This ensures that the purified air circulates only within the experimental space and is unaffected by pollutants above the ceiling.

[0039] The unit's base plate 13 is made of the same material as the ceiling and is flush with it. The sealing components ensure that the joints are tight, which not only maintains the original function of the ceiling and meets the needs of concealing pipes and lines, but also avoids damage to the ceiling structure during installation, thus improving the compatibility of the device with the existing facilities in the animal house.

[0040] like Figure 5 , Figure 8 As shown, the sealing assembly includes a groove plate 19 and a sealing strip 18. The groove plate 19 is embedded in the joint between the unit side plate 17 and the ceiling plate 11. The sealing strip 18 is distributed along the joint of the unit 1 in a circumferential direction. The groove plate 19 is fixed to the unit side plate 17. The joint at the embedded position of the groove plate 19 is filled with sealant 20.

[0041] The sealing strip 18 is a rounded corner strip. The sides of the rounded corner strip are attached to and fixed to the side panel 17 of the unit, and the bottom is attached to and fixed to the top surface of the ceiling panel 11. The sealing strip 18 can also be made of channel steel, such as... Figure 8 As shown, one side of the channel steel is fixed to the unit side plate 17 by blind rivets, and the bottom is fixed to the ceiling plate 11 by blind rivets.

[0042] The sealing assembly forms a multi-layered protection. The groove plate 19 is embedded in the joint, serving as a structural filler for the joint. It reduces the volume of the gap through physical filling and also serves as the installation base for the sealing strip 18. The sealant 20 fills the gap between the groove plate 19 and the joint, forming the first chemical sealing barrier to block the gas permeation path. The rounded corner strip serves as the sealing strip 18. It uses the L-shaped surface on one side of the rounded structure to fit the rounded corner joint between the unit side plate 17 and the ceiling plate 11. The mechanical seal formed by the side of the unit side plate 17 and the bottom of the ceiling plate 11 forms the second physical seal. Its rounded design can disperse the stress at the joint and avoid seal failure caused by slight displacement of the unit 1.

[0043] In addition, when the channel steel is used as the sealing strip 18, its L-shaped structure can be used to fit the inside corner joint of the unit side plate 17 and the ceiling plate 11; the channel plate 19 is also L-shaped. After one end of the channel plate 19 is embedded in the joint, the top end overlaps the top surface of the ceiling plate 11 and contacts the bottom of the channel steel. It is fixed to the ceiling plate 11 together by means of blind aluminum rivets, etc.

[0044] The multi-layered sealing works synergistically to eliminate the risk of leakage at the joint between the unit 1 side and the ceiling panel 11, ensuring that pollutants above the ceiling cannot enter the experimental space through gaps.

[0045] Replacing the filter module inside a ceiling-mounted unit is difficult and inconvenient, and the maintenance area created in the ceiling is detrimental to the room's airtightness and cleanliness. Therefore, in this embodiment, as follows... Figure 3 As shown, the unit base plate 13 has an access port 9 and an access door, located between the first odor removal filter section 4 and the second odor removal filter section 5. The filter section includes the first odor removal filter section 4, the second odor removal filter section 5 and the air filter section 6 arranged in sequence, and the access port 9 is located between the first odor removal filter section 4 and the second odor removal filter section 5.

[0046] The filtration system is subdivided into three sections: a first odor removal filter section 4, a second odor removal filter section 5, and an air filter section 6, forming a tiered purification process. The access port 9 is located between the first and second odor removal filter sections, corresponding to the core consumables area. Opening the access door allows direct access to the filter module without removing the ceiling or entering above it, solving the problem of difficult installation and maintenance within traditional ceiling-mounted systems.

[0047] The filtration sections are arranged in stages, equipped with dual odor removal and medium-efficiency filtration, to treat odors such as ammonia and hydrogen sulfide and particulate matter in the laboratory animal room in a step-by-step manner, thereby improving purification efficiency; the inspection port 9 corresponds to the position of the filtration section, which allows for precise replacement of the target filtration module and reduces the interference of maintenance operations on other purification processes.

[0048] Air inlet 8 and air outlet 10 are louvered air vents, serving both airflow guidance and protection functions. The louvered air vents are hinged for easy opening and closing, and also function as maintenance access ports 9 and filter replacement ports. Unit 1 is connected to spring hanger 15 via a hanger rod 14. The hanger rod 14 and the pre-installed lifting lugs on Unit 1 are connected by nuts 16 to form a suspension system. The spring hanger 15 is fixed to the ceiling 12 with expansion bolts, achieving suspended installation. The external casing of Unit 1 is completely isolated from the space above the ceiling panel 11, enhancing airtightness. Unit 1 draws in air from the experimental space through the hinged louvered air inlet 8, purifies it, and then returns it to the same space through the air outlet 10, forming an internal circulation. Isolating the space above and below the ceiling ensures that air circulation is completed only within the experimental space, preventing unpurified air from above the ceiling from mixing into the circulation system, reducing purification efficiency, or increasing energy consumption.

[0049] The spring hanger 15 is connected to the unit 1 through the hanger rod 14. The spring absorbs the vibration of the unit 1 during operation by using the buffering effect of the spring, and avoids the vibration from being transmitted to the roof 12 or the ceiling, thus preventing the vibration from disturbing the pollutants above the ceiling. The expansion bolts ensure that the suspension structure is stable and can adapt to the working conditions of the unit 1 operating 24 hours a day all year round.

[0050] The louvered air vents can adjust the airflow direction to avoid direct airflow onto laboratory animals; at the same time, the external casing of Unit 1 is isolated from the space above the ceiling, further enhancing the closed-loop nature of the internal circulation and ensuring that the purified air circulates only within the laboratory space. The space above the ceiling is usually not a purification control area and may contain pollutants such as dust, condensate from pipes, and building debris. Isolation prevents these pollutants from entering the laboratory space below, ensuring the cleanliness of the experimental environment.

[0051] In the multi-layer sealing assembly, the groove plate 19, sealant 20, and rounded corner strips reduce the leakage rate at the joints to near zero, preventing contaminants from entering from above the ceiling and significantly improving the cleanliness and stability of the experimental space. The inspection port 9 precisely corresponds to the filter section, allowing for easy replacement of consumables by simply opening the inspection door, reducing operation time by more than 50% and minimizing maintenance disruptions to the normal operation of the animal facility. The spring hanger 15 effectively reduces vibration, minimizing the impact of unit 1 vibration on its own structure and the ceiling, extending the equipment's lifespan; the louvered air vents optimize airflow distribution, improving the environmental comfort for laboratory animals. The dual odor-removing filter section specifically treats gaseous contaminants, while the air filter section 6 intercepts particulate matter. This tiered purification enhances the odor removal rate, meeting the stringent air quality requirements of the laboratory animal facility.

[0052] Barrier and isolation environments have strict requirements for the independence and airtightness of the space. The space above and below the isolation ceiling is a necessary measure to achieve physical separation between clean and non-clean areas, which can meet the relevant standards for the control requirements of the laboratory animal breeding environment and protect the health of laboratory animals and staff.

[0053] Example 2 In another typical embodiment of the present invention, such as Figures 1-8 As shown, a method for operating an air treatment device for an experimental animal room is provided, utilizing the air treatment device for an experimental animal room as described in Example 1.

[0054] A method for operating an air handling device for a laboratory animal facility includes: Air in the experimental space below the ceiling enters the device through the air inlet 8 on the unit base plate 13, is guided to the fan section 3 through the air inlet section 2, and flows to the filter section under the power of the fan to complete air purification and odor treatment. The treated clean air is guided through the air outlet section 7 and sent back to the experimental space below the ceiling from the air outlet 10 on the unit base plate 13, forming an internal air circulation. Due to the sealed and isolated design of unit 1 and ceiling panel 11, there is no air exchange between the upper and lower spaces of the ceiling, ensuring that the circulating air always flows within the experimental space and guaranteeing a stable purification effect.

[0055] A maintenance port 9 is provided on the unit base plate 13 below the filtration section, through which the filter media of the filtration section can be replaced. An indoor air quality and odor gas concentration sensor is installed at the air inlet 8 to monitor indoor air quality and odor conditions. The unit 1 is automatically and flexibly controlled according to indoor air quality and the day and night work cycle of the staff, further reducing energy consumption and extending the replacement cycle of consumables, thus meeting the dual requirements of laboratory animal facilities for environmental hygiene and energy conservation.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An experimental animal room air handling device, characterized by, The unit includes a box-type structure with its base plate embedded in and flush with the ceiling panel. The base plate and side panels are made of materials compatible with the ceiling panel. The base plate has spaced air inlets and outlets. Inside the unit, there are air inlet sections, fan sections, filter sections, and outlet sections between the air inlets and outlets. The joint between the side panels and the embedded ceiling panel is sealed with a sealing component, isolating the space above the ceiling panel from the space below it.

2. The experimental animal room air handling unit of claim 1, wherein The sealing assembly includes a groove plate and a sealing strip. The groove plate is embedded in the joint between the unit's side plate and the ceiling plate, and the sealing strip is distributed along the joints around the unit's circumference.

3. The experimental animal room air handling unit of claim 2, wherein The slotted plate is fixed to the side plate of the unit, and the joint at the embedded position of the slotted plate is filled with sealant.

4. The experimental animal room air handling unit according to claim 2 or 3, wherein The sealing strip is a rounded corner strip or a channel steel. The side of the sealing strip is attached to and fixed to the side plate of the unit, and the bottom is attached to and fixed to the top surface of the ceiling panel.

5. The experimental animal room air handling unit of claim 1, wherein, An inspection port is provided on the unit's base plate between the air inlet and the air outlet, and an inspection door is installed and fitted on the inspection port.

6. The experimental animal room air handling unit of claim 5, wherein, The filter section includes a first odor removal filter section, a second odor removal filter section, and an air filter section arranged in sequence, with the maintenance port located between the first and second odor removal filter sections.

7. The experimental animal room air handling unit of claim 1 wherein, Both the air inlet and outlet are louvered air vents, and the external casing of the unit is isolated from the space above the ceiling panel.

8. The laboratory animal room air treatment device as described in claim 1, characterized in that, The unit is connected to a spring hanger via a suspension rod, and the spring hanger is fixed to the roof with expansion bolts, so that the unit is suspended below the roof.

9. A method for operating an air treatment device for a laboratory animal facility, utilizing the air treatment device for a laboratory animal facility as described in any one of claims 1-8, characterized in that, include: Air in the experimental space below the ceiling enters the device through the air inlet on the base plate of the unit, is guided to the fan section through the air intake section, and flows to the filter section under the power of the fan to complete air purification and odor treatment. The treated clean air is guided through the air outlet section and sent back to the experimental space below the ceiling from the air outlet on the base plate of the unit, forming an internal air circulation. Due to the sealed and isolated design of the unit and the ceiling panel, there is no air exchange between the upper and lower spaces of the ceiling, ensuring that the circulating air always flows within the experimental space and guaranteeing a stable purification effect.

10. The method of operating the air treatment device for experimental animal rooms as described in claim 9, characterized in that, An inspection port is opened on the unit base plate below the filtration section, through which the filter media of the filtration section can be replaced.

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