Multi-fan host device

Abstract

This utility model relates to a multi-fan main unit, including a primary filter chamber, an inlet high-efficiency filter chamber, an outlet duct, a controller, a return high-efficiency filter chamber, an exhaust chamber, and an inlet duct. An inlet fan is installed inside the primary filter chamber. The inlet high-efficiency filter chamber is located at the bottom of the primary filter chamber. The outlet duct is connected to the inlet high-efficiency filter chamber. The controller is located at the top of the primary filter chamber. The return high-efficiency filter chamber is located at the top of the controller. Multiple outlet fans are installed inside the exhaust chamber. The inlet duct is connected to the return high-efficiency filter chamber. Through the diversion design of the Y-shaped inlet duct and the inverted Y-shaped outlet duct, combined with the collaborative working mechanism of multiple outlet fans and one inlet fan, and the pre-purification function of the primary filter chamber, the multi-fan main unit according to this utility model embodiment can effectively improve air handling efficiency and airflow delivery stability.

Description

Technical Field

[0001] This utility model relates to the field of laboratory animal husbandry, and in particular to a multi-fan main unit. Background Technology

[0002] In the field of laboratory animal husbandry, IVC (Individual Ventilated Cages) systems are widely used in the husbandry and management of laboratory animals such as mice and rats. The IVC main unit, as the core equipment, is responsible for supplying clean air to the cages and maintaining a suitable air pressure environment. Currently, most IVC main units on the market use a single-fan configuration, meaning only one inlet fan and one outlet fan. This configuration was initially sufficient for a certain scale of animal husbandry. However, as scientific research experiments have increasingly demanded higher numbers of laboratory animals and improved living conditions, its limitations have become more apparent. The ventilation volume and air pressure regulation capacity of a single fan are limited. When the number of cages increases, it becomes difficult to meet the ventilation needs of all cages, leading to a decline in air quality in some cages, affecting the health of the laboratory animals, and consequently interfering with the accuracy and reliability of experimental results. Technological improvements are urgently needed to address these issues. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a multi-fan main unit. Through the diversion and convergence design of Y-shaped air inlet duct and inverted Y-shaped air outlet duct, the coordinated airflow driving mechanism of multiple outlet fans and one inlet fan, the pre-purification structure of the primary filter chamber, and the intelligent dynamic adjustment function of the controller, it effectively solves the problem of insufficient ventilation and limited air pressure regulation capability of a single fan when the load on the squirrel cage increases, thus solving the problems mentioned in the background technology.

[0004] This utility model provides the following technical solution: a multi-fan main unit, including a primary filter chamber, an inlet high-efficiency filter chamber, an outlet duct, a controller, a return high-efficiency filter chamber, an exhaust chamber, and an inlet duct;

[0005] The primary filter chamber is a hollow rectangular structure, and an air intake fan is installed inside the primary filter chamber;

[0006] The air inlet high-efficiency filter chamber is a hollow rectangular structure, and it is located at the bottom of the primary filter chamber.

[0007] The air outlet duct has an inverted Y-shaped structure and is connected to the air inlet high-efficiency filter chamber.

[0008] The controller is located at the top of the primary filter chamber;

[0009] The return air high-efficiency filter chamber is a hollow rectangular structure, and it is located on top of the controller.

[0010] The exhaust chamber is a hollow rectangular structure, and multiple exhaust fans are installed inside the exhaust chamber.

[0011] The air inlet duct has a Y-shaped structure and is connected to the return air high-efficiency filter chamber.

[0012] In one embodiment of the utility model, the air outlet duct includes an air outlet port, a first guide section, and a first vertical main duct;

[0013] The air outlet has a rectangular block structure, and there are two air outlets arranged side by side opposite each other.

[0014] The first guide section has an inverted Y-shaped structure, and the two arms of the first guide section are respectively connected to the two air outlet ports;

[0015] The bottom of the first vertical main pipe is connected to the top of the first guide section.

[0016] In one embodiment of the utility model, the air inlet duct includes an air inlet port, a second guide section, and a second vertical main duct;

[0017] The air inlet port has a rectangular block structure, and there are two air inlets arranged side by side opposite each other.

[0018] The second guide section has a Y-shaped structure, and the two arms of the second guide section are connected to the two air inlet ports respectively.

[0019] The top of the second vertical main pipe is connected to the bottom of the second guide section.

[0020] In one embodiment of the utility model, the air intake high-efficiency filter chamber includes a first air inlet and a first air outlet;

[0021] The first air inlet is located at the top of the high-efficiency air filter chamber, and the first air outlet is located at the bottom of the high-efficiency air filter chamber.

[0022] The first air outlet of the high-efficiency air filter chamber is connected to the first vertical main duct of the air outlet duct.

[0023] In one embodiment of the utility model, the primary filter chamber includes a primary filter screen and a second air outlet;

[0024] The primary filter is located at the front of the primary filter chamber, and the second air outlet is located at the bottom of the primary filter chamber.

[0025] The second air outlet of the primary filter chamber is connected to the first air inlet of the high-efficiency filter chamber via a pipe.

[0026] In one embodiment of the utility model, the exhaust chamber includes a second air inlet, a third air outlet, and a wind speed sensor;

[0027] The second air inlet is located at the bottom of the exhaust chamber, and the third air outlet is located at the top of the exhaust chamber.

[0028] The wind speed sensor is connected to the outlet fan.

[0029] In one embodiment of the utility model, the return air high-efficiency filter chamber includes a third air inlet and a fourth air outlet;

[0030] The third air inlet is located at the bottom of the return air high-efficiency filter chamber, and the fourth air outlet is located at the top of the return air high-efficiency filter chamber.

[0031] The third air inlet of the return air high-efficiency filter chamber is connected to the bottom of the second vertical main duct of the air inlet duct, and the fourth air outlet of the return air high-efficiency filter chamber is connected to the second air inlet of the exhaust chamber through a duct.

[0032] In one embodiment of the utility model, an exhaust pipe is also included, with a wire mesh installed inside the exhaust pipe, and the bottom of the exhaust pipe is connected to the third air outlet of the exhaust chamber.

[0033] In one embodiment of the utility model, a terminal block assembly is also included, which is disposed on the controller and electrically connected to the wind speed sensor.

[0034] In one embodiment of the utility model, a power supply compartment is also included. The power supply compartment is located at the bottom of the high-efficiency air inlet transition compartment and is electrically connected to the outlet fan, the controller and the inlet fan.

[0035] The beneficial effects of this utility model are:

[0036] The main unit of this blower features a hollow rectangular primary filter chamber. The internal intake fan actively draws in outside air, reducing airflow resistance. The primary filter intercepts large particles, protecting downstream equipment and extending its lifespan. The secondary high-efficiency filter chamber, also a hollow rectangular structure, is located at the bottom of the primary filter chamber, forming a two-stage filtration system to improve air cleanliness for demanding applications. An inverted Y-shaped outlet duct connects to the secondary high-efficiency filter chamber, enabling uniform airflow across multiple areas, reducing secondary pollution, and ensuring clean air. The controller is located on top of the primary filter chamber for easy wiring, signal transmission, and operation and maintenance. To ensure stable system operation, the return air high-efficiency filter chamber is a hollow rectangular structure located at the top of the controller. It can fully filter pollutants in the return air, make reasonable use of space, and separate the supply and exhaust air processes to ensure efficient system operation. The exhaust chamber is also a hollow rectangular structure with multiple exhaust fans forming a redundant design, ensuring continuous and stable exhaust air and allowing for precise control of the exhaust volume to maintain air pressure balance. The Y-shaped air inlet duct connects to the return air high-efficiency filter chamber, which can efficiently collect waste gas and quickly bring it into the filter chamber for treatment. Some of the purified waste gas can be recycled, improving energy utilization and reducing energy consumption. The synergistic effect of all parts comprehensively improves the performance of the device.

[0037] Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0038] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of the present invention together with the specification and serve to explain the principles of the present invention.

[0039] Figure 1 This diagram shows the main structure of the multi-fan main unit according to an embodiment of the present invention;

[0040] Figure 2 This shows a rear view of the multi-fan main unit according to an embodiment of the present invention;

[0041] Figure 3 This diagram shows the air outlet duct structure of the multi-fan main unit according to an embodiment of the present invention; Detailed Implementation

[0042] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0043] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0046] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented even without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this utility model.

[0047] The technical solution of this utility model is a multi-fan main unit, which is applied in the field of laboratory animal breeding. It plays a role in optimizing airflow through Y-shaped and inverted Y-shaped pipes, coordinating the drive of two outlet fans and one inlet fan, primary filtration and purification, and intelligent control, so as to achieve efficient air delivery, stable air pressure regulation and cleanliness guarantee, thereby improving the operating efficiency and environmental adaptability of the ventilation system.

[0048] Specific references Figures 1-3 As a specific embodiment of the multi-fan main unit of this utility model, the multi-fan main unit includes: a primary filter chamber 150, an inlet high-efficiency filter chamber 160, an outlet duct 210, a controller 140, a return high-efficiency filter chamber 130, an exhaust chamber 120, and an inlet duct 110. This multi-fan main unit is mainly composed of the primary filter chamber 150, the inlet high-efficiency filter chamber 160, the outlet duct 210, the controller 140, the return high-efficiency filter chamber 130, the exhaust chamber 120, and the inlet duct 110. The various components work together to achieve efficient transportation of fresh air and regulation of air pressure.

[0049] The pre-filter chamber 150 has a hollow rectangular structure and an internal air intake fan. This hollow rectangular design provides ample and regular space for airflow, reducing airflow resistance and allowing air to pass through the filtration process more smoothly. The internal air intake fan is the power source for air entering the filter chamber; it actively draws in outside air, enabling it to quickly enter the pre-filter process and provide initial airflow for subsequent air purification.

[0050] Furthermore, such as Figure 1 As shown, the hollow rectangular structure of the pre-filter chamber 150 provides installation space for the intake fan, and the rectangular regularity ensures low resistance and uniform airflow. The intake fan, acting as the "starting force for air delivery," draws in outside air into the pre-filter stage, intercepting large particles (such as dust), reducing the burden on subsequent purification processes. It is the "first stage of fine purification" for the air entering the device.

[0051] The intake HEPA filter chamber 160 has a hollow rectangular structure and is located at the bottom of the pre-filter chamber 150. Its hollow rectangular structure facilitates the installation, replacement, and maintenance of the HEPA filter, while ensuring uniform air distribution within the chamber and sufficient contact with the filter to improve filtration efficiency. By placing it at the bottom of the pre-filter chamber 150, a two-stage filtration process of "pre-filter → HEPA filter" is formed. Air that has passed through the pre-filter can naturally flow into the intake HEPA filter chamber 160 for further purification, removing even minute pollutants from the air.

[0052] Furthermore, such as Figure 1 As shown, the intake high-efficiency filter chamber 160 takes advantage of the rectangular space of the pre-filter chamber 150, allowing the air purified by the pre-filter to pass evenly through the high-efficiency filter for deep purification within the hollow chamber, intercepting fine particles, microorganisms, etc. The "bottom setting" allows the airflow to naturally sink and flow through, using gravity to assist purification and outputting air with higher cleanliness, which is the "second fine purification" to ensure the air quality delivered to the experimental environment.

[0053] The exhaust duct 210 has an inverted Y-shaped structure and is connected to the inlet high-efficiency filter chamber 160. The inverted Y-shaped structure of the exhaust duct 210 is designed to achieve multi-directional delivery of clean air, effectively distributing the air purified by the inlet high-efficiency filter chamber 160. Direct connection to the inlet high-efficiency filter chamber 160 ensures that secondary pollution is reduced during air delivery, allowing the purified air to be quickly and evenly delivered to the required areas through the inverted Y-shaped duct.

[0054] Furthermore, such as Figure 2 and Figure 3 As shown, the inverted Y-shaped air outlet duct 210 corresponds to this branch structure, delivering the clean air purified by the high-efficiency filter chamber 160 to different directions of the experimental mouse cage through the "inverted Y split". The connection design allows the purified air to directly enter the duct, reducing secondary pollution and achieving "uniform air supply in multiple areas" to meet the air demand of multiple points in the experimental environment.

[0055] The controller 140 is located on top of the primary filter chamber 150. This arrangement facilitates wiring connections with equipment such as the air intake fan inside the primary filter chamber 150, enabling the receiving of equipment operation signals and the sending of control commands. Furthermore, the controller 140 is positioned in a relatively easy-to-operate and maintain location, allowing staff to conveniently set parameters and check the status of the controller 140 to ensure the normal operation of the entire device.

[0056] Furthermore, such as Figure 1As shown, the controller 140 is located at the top of the primary filter chamber 150, facilitating connection with the air intake fan and other components within the primary filter chamber 150 for rapid data acquisition and command issuance. It is also easy for staff to operate, serving as the "intelligent control hub" of the device and ensuring the coordinated operation of all components.

[0057] The return air HEPA filter chamber 130 is a hollow rectangular structure. Located on top of the controller 140, its hollow rectangular structure provides ample processing space for the recovered exhaust gas, ensuring sufficient contact between the exhaust gas and the filter chamber, thus improving filtration efficiency and effectively removing pollutants. Positioning it on top of the controller 140 optimizes space utilization, allowing the return air treatment system to be arranged in an orderly manner with other components, forming a compact and efficient overall structure.

[0058] Furthermore, such as Figure 1 As shown, the hollow rectangular return air high-efficiency filter chamber 130 is adapted to the return airflow path. After recovering the exhaust gas from the experimental environment, the airflow is allowed to fully contact the high-efficiency filter inside the chamber. The "top setting" utilizes vertical space to make the "supply air-return air" process clearly layered and without interference, which is the core of "exhaust gas purification and recovery" and maintains clean air circulation within the system.

[0059] The exhaust chamber 120 is a hollow rectangular structure. Multiple exhaust fans are installed inside the exhaust chamber 120. The hollow rectangular structure of the exhaust chamber 120 facilitates the collection and flow of exhaust gas, reduces resistance during the emission process, and provides a foundation for stable airflow. Multiple exhaust fans are installed internally; this design uses two small exhaust fans. Their core function is to precisely control the airflow discharge by flexibly adjusting the speed of each fan, thereby coordinating with the air supply system to stably maintain the preset pressure difference required for the experimental environment. Simultaneously, the multiple fans also form a redundancy design; even if one fan fails, the others can still ensure the basic function of the exhaust system, ensuring that the pressure balance is not suddenly disrupted.

[0060] Furthermore, such as Figure 1 As shown, the hollow rectangular exhaust chamber 120 provides a channel for the final discharge of exhaust gas, and multiple exhaust fans can flexibly adjust their speeds: according to the system pressure requirements, the exhaust volume is controlled in a coordinated manner. The multi-fan design also has redundancy, ensuring "stable exhaust gas discharge and precise pressure control", which is the key to the system's "pressure balance".

[0061] The air inlet duct 110 has a Y-shaped structure and connects to the return air high-efficiency filter chamber 130. The Y-shaped structure of the air inlet duct 110 allows for the collection of exhaust gas from multiple directions, increasing the intake volume and range, thus making exhaust gas collection more efficient and comprehensive. After connecting to the return air high-efficiency filter chamber 130, the collected exhaust gas can be directly transported to the return air high-efficiency filter chamber 130 for purification, providing a smooth channel for subsequent exhaust gas treatment.

[0062] Furthermore, such as Figure 1 As shown, the Y-shaped air inlet duct 110 is responsible for collecting exhaust gas from the experimental environment. By branching, it expands the exhaust gas collection range, allowing the airflow to converge more evenly. After connecting with the return air high-efficiency filter chamber 130, the exhaust gas directly enters the purification process, forming a closed loop of "exhaust gas recovery-purification-discharge", which is the starting channel for the system's "exhaust gas circulation treatment".

[0063] In this embodiment, the air outlet duct 210 includes an air outlet port 211, a first guide section 212, and a first vertical main duct 213. The air outlet port 211 has a rectangular block structure, and two air outlet ports 211 are arranged side by side. The first guide section 212 has an inverted Y-shaped structure, and its two arms are respectively connected to the two air outlet ports 211. The bottom of the first vertical main duct 213 is connected to the top of the first guide section 212. The air outlet duct 210 consists of the air outlet port 211, the first guide section 212, and the first vertical main duct 213. 13. Components: Two rectangular block-shaped air outlet ports 211 are arranged side by side and can be connected to external air supply ducts via flanges or clips, serving as clean air output interfaces; the two arms of the inverted Y-shaped first guide section 212 are connected to the air outlet ports 211 through sealing rings, using the inverted Y structure to "split" the airflow into two, achieving uniform air supply to multiple areas; the bottom of the first vertical main duct 213 is connected to the top of the first guide section 212 through a reducing joint, receiving the clean air output from the high-efficiency filter chamber 160, forming an air supply path of "purification and convergence - diversion and output", ensuring balanced airflow in different areas.

[0064] In this embodiment, the air inlet duct 110 includes an air inlet port 111, a second guide section 112, and a second vertical main duct 113. The air inlet port 111 has a rectangular block structure, and two air inlets 111 are arranged side by side opposite each other. The second guide section 112 has a Y-shaped structure, and its two arms are respectively connected to the two air inlets 111. The top of the second vertical main duct 113 is connected to the bottom of the second guide section 112. The air inlet duct 110 includes an air inlet port 111, The second guide section 112 and the second vertical main pipe 113 have two rectangular air inlets 111 arranged side by side and can be connected to an external waste gas recovery pipe to collect waste gas from the experimental environment. The two arms of the Y-shaped second guide section 112 are connected to the air inlets 111 through a sealed connection to gather the dispersed waste gas into one. The top of the second vertical main pipe 113 is connected to the bottom of the second guide section 112. The Y-shaped structure expands the waste gas collection range and allows the airflow to enter the subsequent purification process more evenly, forming a "multi-port recovery-centralized transportation" waste gas input path.

[0065] In this embodiment, the high-efficiency air intake filter chamber 160 includes a first air inlet and a first air outlet. The first air inlet is located at the top of the high-efficiency air intake filter chamber 160, and the first air outlet is located at the bottom of the high-efficiency air intake filter chamber 160. The first air outlet of the high-efficiency air intake filter chamber 160 is connected to the first vertical main pipe 213 of the air outlet duct 210. The high-efficiency air intake filter chamber 160 is provided with a first air inlet (top) and a first air outlet (bottom): the top first air inlet is connected to the second air outlet of the pre-filter chamber 150 through a flexible hose or rigid pipe to receive the air purified by the pre-filter; the air flows vertically through the high-efficiency filter in the hollow rectangular chamber, deeply intercepting fine particles; the purified air is connected to the first vertical main pipe 213 of the air outlet duct 210 through the bottom first air outlet via a flange, realizing the vertical purification process of "top air intake - bottom air outlet" to ensure that clean air is directly delivered into the air supply duct.

[0066] In this embodiment, the primary filter chamber 150 includes a primary filter and a second air outlet. The primary filter is located at the front of the primary filter chamber 150, and the second air outlet is located at the bottom of the primary filter chamber 150. The second air outlet of the primary filter chamber 150 is connected to the first air inlet of the high-efficiency filter chamber 160 through a pipe. The primary filter chamber 150 contains a primary filter (front) and a second air outlet (bottom). The primary filter is installed at the front of the chamber by a hook to intercept large particles of impurities, making it easy to remove and replace. Air is drawn into the chamber by a fan, passes through the filter, and exits from the second air outlet at the bottom. It then connects to the first air inlet of the high-efficiency filter chamber 160 through a pipe, forming a primary purification path of "pre-filtration - bottom air outlet," which reduces the burden on subsequent high-efficiency filters and extends their service life.

[0067] In this embodiment, the exhaust chamber 120 includes a second air inlet, a third air outlet, and a wind speed sensor. The second air inlet is located at the bottom of the exhaust chamber 120, and the third air outlet is located at the top of the exhaust chamber 120. The wind speed sensor is connected to the exhaust fan. The exhaust chamber 120 has a second air inlet (bottom), a third air outlet (top), and a wind speed sensor. The bottom second air inlet is connected to the fourth air outlet of the return air high-efficiency filter chamber 130 through a pipe to receive the deeply purified exhaust gas. The top third air outlet is connected to the exhaust pipe 180 through a flange to discharge the final exhaust gas. Multiple built-in exhaust fans are electrically connected to the wind speed sensor. The wind speed sensor monitors the exhaust wind speed in real time and adjusts the fan speed based on the feedback data, realizing "bottom air inlet - top air outlet + wind speed feedback control" to ensure stable system air pressure.

[0068] In this embodiment, the return air high-efficiency filter chamber 130 includes a third air inlet and a fourth air outlet. The third air inlet is located at the bottom of the return air high-efficiency filter chamber 130, and the fourth air outlet is located at the top of the return air high-efficiency filter chamber 130. The third air inlet of the return air high-efficiency filter chamber 130 is connected to the bottom of the second vertical main pipe 113 of the air inlet duct 110, and the fourth air outlet of the return air high-efficiency filter chamber 130 is connected to the second air inlet of the exhaust chamber 120 through a pipe. The return air high-efficiency filter chamber 130 has a third air inlet (bottom) and a fourth air outlet (top). The bottom third air inlet is connected to the bottom of the second vertical main pipe 113 of the air inlet duct 110 through a pipe to receive exhaust gas. Air flows vertically through the high-efficiency filter in the hollow rectangular chamber, deeply purifying the exhaust gas. After purification, the exhaust gas flows from the top fourth air outlet through a pipe to the second air inlet of the exhaust chamber 120, forming a secondary purification path of "bottom air inlet - top air outlet" to avoid polluting the internal environment of the device.

[0069] In this embodiment, an exhaust pipe 180 is also included. A wire mesh is installed inside the exhaust pipe 180. The bottom of the exhaust pipe 180 is connected to the third air outlet of the exhaust chamber 120. The exhaust pipe 180 is the final exhaust channel for waste gas. The wire mesh inside can intercept large particulate impurities remaining in the waste gas. The bottom is connected to the third air outlet of the exhaust chamber 120 through a flange. The waste gas pressurized by the exhaust chamber 120 is discharged from the system after secondary filtration by the wire mesh, ensuring the basic cleanliness of the discharged waste gas and protecting the downstream equipment of the exhaust pipe 180.

[0070] In this embodiment, a terminal block assembly is also included. The terminal block assembly is disposed on the controller 140 and is electrically connected to the wind speed sensor. The terminal block assembly is integrated on the surface of the controller 140 and is connected to devices such as the wind speed sensor, the outlet fan, and the inlet fan through wires. It serves as an electrical signal relay interface: receiving analog or digital signals from the wind speed sensor and transmitting them to the controller 140 for data analysis; sending the control commands of the controller 140 to each execution device, realizing the electrical connection function of "signal acquisition-command issuance" and ensuring intelligent control of the system.

[0071] In this embodiment, a power supply compartment 170 is also included. The power supply compartment 170 is located at the bottom of the high-efficiency air intake transition compartment. The power supply compartment 170 is electrically connected to the outlet fan, controller 140, and inlet fan. The power supply compartment 170 is an independent sealed module located at the bottom of the high-efficiency air intake filter compartment 160. It has a built-in switching power supply and is electrically connected to the outlet fan, controller 140, and inlet fan through wires. It converts external mains power into the device's compatible voltage to provide stable power to each component. If a UPS is configured, it can maintain the operation of the device for a short time during power outages, ensuring the continuity of system power supply and avoiding the impact of sudden power outages on the experimental environment.

[0072] Furthermore, the configuration of one large intake fan paired with two small exhaust fans in this embodiment significantly increases the system's ventilation volume. The large intake fan can provide ample fresh air to meet the ventilation needs of more cages, enabling the IVC (Individual Ventilated Cages) unit to support a larger number of cages. This effectively solves the problem of the limited number of cages that can be supported by a traditional single-fan unit, and adapts to the needs of raising a large number of laboratory animals in scientific research experiments.

[0073] Furthermore, the rational arrangement of fans and the design of the airflow structure reduce energy loss in the system and avoid the generation of eddies and dead zones. Fresh air can enter each cage evenly and quickly, while polluted air can be discharged in a timely manner, thereby improving the ventilation efficiency of the entire system and significantly improving the air quality inside the cages.

[0074] Furthermore, this multi-fan main unit also includes a housing, which is a hollow structure open at one end. A baffle is installed in the middle of the housing, dividing it into upper and lower spaces. The upper space houses the exhaust chamber 120, the return air high-efficiency filter chamber 130, and the controller 140. The lower space houses the pre-filter chamber 150, the inlet air high-efficiency filter chamber 160, and the power supply chamber 170. The air supply process involves outside air entering the inlet air high-efficiency filter chamber 160 through the pre-filter chamber 150, where it is purified; the air is then delivered to the rat cages from the central "air outlet" at the back, providing clean air for the laboratory animals. The exhaust process involves waste gas from the rat cages entering the main unit's return air high-efficiency filter chamber 130 through a pipe, being purified, and then exiting into the exhaust chamber 120. Two exhaust fans discharge the highly filtered waste gas from the "exhaust outlet." The air pressure inside the rat cages is maintained within a set range by measuring and adjusting the speed of all fans. The UPS power supply compartment 170 ensures power supply for a certain period of time during power outages. The main control panel can set various parameters (such as air volume, pressure, etc.) to regulate the operation of the fan and ensure stable system operation, creating a suitable living environment for laboratory animals.

[0075] This utility model's multi-fan main unit can form a complete air treatment and circulation system through the coordinated operation of its components, achieving efficient air purification and stable maintenance of the experimental animal breeding environment. Specifically, the primary filter chamber is based on a hollow rectangular structure, with an internal air intake fan actively drawing in air. After preliminary filtration by the primary filter, the air is delivered to the high-efficiency filter chamber through the second air outlet. The high-efficiency filter chamber receives air through the first air inlet at the top, and after deep purification, it is sent to the first vertical main duct of the outlet duct from the first air outlet. The inverted Y-shaped first guide section divides the clean air to two opposite rectangular air outlet ports, achieving uniform air delivery to multiple areas. Meanwhile, the two rectangular inlet ports of the Y-shaped air inlet duct collect exhaust gas, which is then transported to the return air high-efficiency filter chamber via the second guide section and the second vertical main duct. After purification, the exhaust gas is sent to the exhaust chamber. The exhaust chamber receives exhaust gas through the second air inlet at the bottom and connects to the exhaust pipe through the third air outlet at the top. Multiple exhaust fans inside the chamber precisely regulate their speed under the monitoring feedback of wind speed sensors (connected to the terminal block and controller), discharging the exhaust gas through the exhaust pipe. The wire mesh inside the exhaust pipe further filters the exhaust gas. The power supply compartment provides power to all equipment to ensure operation. The entire system improves air cleanliness through two-stage filtration, stabilizes air pressure with multiple fans and wind speed sensors, and expands the air supply and exhaust range through a multi-port design, ultimately creating a suitable living environment for laboratory animals.

[0076] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A multi-fan main unit, characterized in that, It includes a primary filter chamber, an inlet high-efficiency filter chamber, an outlet duct, a controller, a return high-efficiency filter chamber, an exhaust chamber, and an inlet duct; The primary filter chamber is a hollow rectangular structure, and an air intake fan is installed inside the primary filter chamber; The air inlet high-efficiency filter chamber is a hollow rectangular structure, and the air inlet high-efficiency filter chamber is located at the bottom of the primary filter chamber; The air outlet duct has an inverted Y-shaped structure and is connected to the air inlet high-efficiency filter chamber; the controller is located on the top of the primary filter chamber. The return air high-efficiency filter chamber is a hollow rectangular structure, and the return air high-efficiency filter chamber is located on the top of the controller; The exhaust chamber is a hollow rectangular structure, and an exhaust fan is installed inside the exhaust chamber. The number of exhaust fans is multiple. The air inlet duct has a Y-shaped structure and is connected to the return air high-efficiency filter chamber.

2. The multi-fan main unit according to claim 1, characterized in that, The air outlet duct includes an air outlet port, a first guide section, and a first vertical main duct; The air outlet is a rectangular block structure, and there are two air outlets arranged side by side opposite each other. The first air guide is an inverted Y-shaped structure, and the two arms of the first air guide are respectively connected to the two air outlet ports; The bottom of the first vertical main pipe is connected to the top of the first guide section.

3. The multi-fan main unit according to claim 1, characterized in that, The air inlet duct includes an air inlet port, a second guide section, and a second vertical main duct; The air inlet port has a rectangular block structure, and there are two air inlets arranged side by side opposite each other. The second guide section has a Y-shaped structure, and the two arms of the second guide section are respectively connected to the two air inlet ports; The top of the second vertical main pipe is connected to the bottom of the second guide section.

4. The multi-fan main unit according to claim 2, characterized in that, The high-efficiency air filter chamber includes a first air inlet and a first air outlet; The first air inlet is located at the top of the high-efficiency air filter chamber, and the first air outlet is located at the bottom of the high-efficiency air filter chamber. The first air outlet of the high-efficiency air intake filter chamber is connected to the first vertical main pipe of the air outlet duct.

5. The multi-fan main unit according to claim 4, characterized in that, The primary filter chamber includes a primary filter screen and a second air outlet. The primary filter is located at the front of the primary filter chamber, and the second air outlet is located at the bottom of the primary filter chamber. The second air outlet of the primary filter chamber is connected to the first air inlet of the high-efficiency air filter chamber via a pipe.

6. The multi-fan main unit according to claim 3, characterized in that, The exhaust chamber includes a second air inlet, a third air outlet, and a wind speed sensor; The second air inlet is located at the bottom of the exhaust chamber, and the third air outlet is located at the bottom of the exhaust chamber. The top of the wind turbine; The wind speed sensor is connected to the outlet fan.

7. The multi-fan main unit according to claim 6, characterized in that, The return air high-efficiency filter chamber includes a third air inlet and a fourth air outlet; The third air inlet is located at the bottom of the return air high-efficiency filter chamber, and the fourth air outlet is located at the top of the return air high-efficiency filter chamber. The third air inlet of the return air high-efficiency filter chamber is connected to the bottom of the second vertical main pipe of the air inlet duct, and the fourth air outlet of the return air high-efficiency filter chamber is connected to the second air inlet of the exhaust chamber through a pipe.

8. The multi-fan main unit according to claim 6, characterized in that, It also includes an exhaust pipe, which is equipped with a wire mesh, and the bottom of the exhaust pipe is connected to the third air outlet of the exhaust chamber.

9. The multi-fan main unit according to claim 6, characterized in that, It also includes a terminal block assembly, which is mounted on the controller and electrically connected to the wind speed sensor.

10. The multi-fan main unit according to claim 1, characterized in that, It also includes a power supply compartment, which is located at the bottom of the high-efficiency air inlet transition compartment, and is electrically connected to the outlet fan, controller and inlet fan.

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