One-way flow fresh air purification system

Abstract

The utility model relates to a one -way flow fresh air purification system, including the fresh air purification machine of installation in main pipeline, the fresh air purification machine includes the casing, and the casing is equipped with HEPA filter screen, activated carbon filter screen and centrifugal fan in the direction of air inlet to air outlet in proper order, the last end of main pipeline is connected with the shunt pipe, and the shunt pipe is connected with multiple ventilation pipes, and the air outlet of multiple ventilation pipes is arranged in different air supply area respectively, DC variable frequency fan is equipped in every ventilation pipe, and DC variable frequency fan starts the fresh air purification machine through communication protocol when starting. The above scheme automatically wakes up the fresh air purification machine when any one DC variable frequency fan starts, and the power is same with tradition when the DC variable frequency fan of full end opens, but the use proportion of the DC variable frequency fan of most time end reaches 100%, and the system operation energy consumption reduces. The air outlet of every ventilation pipe corresponds a room (one air supply area), and the single room air volume is independently controlled, avoids energy waste.

Description

Technical Field

[0001] This utility model relates to the field of fresh air technology, and in particular to a unidirectional flow fresh air purification system. Background Technology

[0002] Traditional unidirectional airflow fresh air systems use a single main unit centralized air supply mode, which has three major technical pain points:

[0003] 1) The main unit needs to provide full-process air pressure to overcome the filter resistance and pipeline pressure loss, resulting in excessive motor power (usually ≥100W), excessive energy consumption and safety hazards;

[0004] 2) The coordinated operation of the entire system leads to energy waste in non-use areas;

[0005] 3) Long-distance duct distribution can easily lead to imbalances in terminal airflow (measured deviations can reach ±30%). Existing HEPA+activated carbon composite filter systems generally have air resistance exceeding 80Pa, further exacerbating energy consumption issues. Summary of the Invention

[0006] To address the aforementioned issues, the present invention aims to provide a unidirectional airflow fresh air purification system that employs a "master-slave distributed frequency conversion" architecture. The centrifugal fan compensates only for the air resistance of the HEPA + activated carbon filter, significantly reducing power consumption. The airflow in a single room can be independently controlled, avoiding energy waste and providing high adjustment precision. The main fan and terminal fans also exhibit low noise.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A unidirectional flow fresh air purification system, characterized in that: it includes a fresh air purifier installed on a main duct, the fresh air purifier including a housing, the housing having an air inlet and an air outlet communicating with the main duct, and a HEPA filter, an activated carbon filter and a centrifugal fan arranged sequentially inside the housing along the direction from the air inlet to the air outlet; a control panel is provided above the centrifugal fan;

[0009] The main duct is connected to a branch pipe at its end, and multiple ventilation pipes are connected to the branch pipe. The air outlets of the multiple ventilation pipes are respectively arranged in different air supply areas. Each ventilation pipe is equipped with a DC inverter fan. When the DC inverter fan is started, the fresh air purifier is started through a communication protocol.

[0010] Preferably, a check valve is provided inside the ventilation duct on the front side of the DC inverter fan.

[0011] Preferably, the inner wall of the fresh air purifier is provided with a filter slide rail plate, and a number of slide grooves are formed on the filter slide rail plate. The HEPA filter and the activated carbon filter are adapted to slide and install on different slide grooves.

[0012] Preferably, both the HEPA filter and the activated carbon filter include a square frame and a filter body disposed within the frame. Sponges are provided on three outer walls of the frame, and an indicator mark is provided on the other outer wall.

[0013] Preferably, the frame and the sponge are provided with a cloth handle, the two ends of which extend out of the outer wall where the indicator mark is located.

[0014] The present invention adopts the above technical solution and has the following beneficial effects:

[0015] ① A branch pipe is installed at the end of the main duct where the fresh air purifier is located. The branch pipe connects to multiple ventilation ducts. DC inverter fans are installed in the ventilation ducts. The fresh air purifier and the DC inverter fans use a communication protocol. When any DC inverter fan starts, the fresh air purifier is automatically awakened. When all the DC inverter fans at the terminal are turned on, the power is the same as that of the traditional system. However, most of the time the usage rate of the DC inverter fans at the terminal is not 100%. For example, when the terminal usage rate is 20%, the power is reduced by 80% compared to the traditional system. The system's energy consumption is reduced, making it more energy-efficient.

[0016] ② Each ventilation duct outlet corresponds to one room (one air supply area), and the air volume adjustment accuracy of a single room reaches ±5%. It is independently controlled and stepless, avoiding energy waste in non-use areas caused by the linkage operation of the whole system and the potential for air volume imbalance at the terminal due to long-distance duct distribution.

[0017] ③ It adopts a "master-slave distributed frequency conversion" architecture, abandoning the centralized air supply mode, which allows for a reduction in the diameter of the main pipeline and makes installation more convenient.

[0018] ④ The centrifugal fan can be a low-power centrifugal fan with relatively low power, which only compensates for the air resistance of the HEPA + activated carbon filter and reduces the power of the fresh air purifier. It has low cost and low noise. The DC inverter fan at the end overcomes the pressure loss of the pipeline and the noise is also relatively reduced.

[0019] ⑤ The air volume of each room can be controlled independently, eliminating the need for a single main unit to supply air at full power. The filter replacement cycle is extended by 2 times, making maintenance convenient.

[0020] ⑥ The system can be freely expanded according to the number of terminal DC inverter fans, making selection and configuration convenient and highly scalable. Attached Figure Description

[0021] Figure 1 This is a plan view of a unidirectional airflow fresh air purification system.

[0022] Figure 2 This is a 3D structural diagram of a fresh air purifier.

[0023] Figure 3 This is a top view of the structure of a fresh air purifier.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter slide rail plate.

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of an activated carbon filter. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., 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 and 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.

[0028] 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, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0031] As Figures 1-5 shown, a unidirectional flow fresh air purification system includes a fresh air purifier 2 installed on the main duct 1. The fresh air purifier 2 includes a housing 3. An air inlet 4 and an air outlet 5 communicating with the main duct 1 are provided on the housing 3. A HEPA filter 6, an activated carbon filter 7, and a centrifugal fan 8 are sequentially arranged in the housing 3 along the direction from the air inlet 4 to the air outlet 5. A control board 9 is provided above the centrifugal fan 8;

[0032] A shunt pipe 10 is connected to the end of the main duct 1. A plurality of ventilation pipes 11 are connected to the shunt pipe 10. The air outlets 5 of the plurality of ventilation pipes 11 are respectively arranged in different air supply areas 12. A DC variable frequency fan 13 is provided in each ventilation pipe 11. When the DC variable frequency fan 13 is started, the fresh air purifier 2 is started through a communication protocol.

[0033] In the above technical solution, a shunt pipe is provided at the end of the main duct where the fresh air purifier is located. A plurality of ventilation pipes are led out from the shunt pipe. DC variable frequency fans are provided in the ventilation pipes. The fresh air purifier and the DC variable frequency fans adopt a communication protocol. When any one of the DC variable frequency fans is started, the fresh air purifier is automatically awakened. When all the DC variable frequency fans at the full end are turned on, the power is the same as that of the traditional one. However, in most cases, the usage ratio of the DC variable frequency fans at the end does not reach 100%. For example, when the end usage rate is 20%, the power is reduced by 80% compared with the traditional one (compared with the traditional system), the system operation energy consumption is reduced, and it is more energy-saving. The air outlet of each ventilation pipe corresponds to a room (an air supply area). The single-room air volume adjustment accuracy reaches ±5%, with independent control and stepless adjustment, avoiding energy waste in non-use areas caused by the full-system linkage operation and the imbalance of the end air volume easily caused by the long-distance pipeline distribution. The system adopts a "master-slave distributed frequency conversion" architecture, abandons the centralized air supply mode, the diameter of the main duct can be reduced (DN100 → DN80), and the installation is more convenient.

[0034] The centrifugal fan can be a low-power centrifugal fan (target ≤50W), which only compensates for the air resistance of the HEPA + activated carbon filter and reduces the power of the fresh air purifier. It is low in cost and has a noise level of 38dB(A). The DC inverter fan at the end overcomes the pressure loss of the pipeline and also reduces the noise level to 32dB(A).

[0035] Each room's airflow can be independently controlled, eliminating the need for a single main unit providing full-power centralized air supply. This doubles the filter replacement cycle and simplifies maintenance. The system can be freely expanded based on the number of terminal DC inverter fans, offering convenient selection and configuration, and strong scalability.

[0036] Furthermore, a check valve 14 is provided inside the ventilation duct 11, in front of the DC inverter fan 13. In this technical solution, the check valve prevents backflow of air from other areas of the room, ensuring airflow stability.

[0037] Furthermore, a filter slide rail plate 15 is fixedly provided on the inner wall of the fresh air purifier 2, and a plurality of slide grooves 16 are formed on the filter slide rail plate 15. The HEPA filter 6 and the activated carbon filter 7 are adapted to slide and be installed in different slide grooves 16. In this technical solution, the filter slide rail plate is used to slide and fix the HEPA filter and the activated carbon filter, making disassembly and assembly more convenient.

[0038] Furthermore, both the HEPA filter 6 and the activated carbon filter 7 include a square frame 17 and a filter body 18 disposed within the frame 17. Sponges 19 are provided on three outer walls of the frame 17, and an indicator mark 20 is provided on the other outer wall. In this technical solution, the sponge on the outer side of the frame protects the entire filter and simultaneously ensures a tight fit between the filter and the filter slide rail. The indicator mark indicates the placement direction of the filter.

[0039] Furthermore, the frame 17 and the sponge 19 are provided with a cloth handle 21, with both ends of the cloth handle 21 extending out from the outer wall where the indicator mark 20 is located. In this technical solution, the cloth handle facilitates the pulling of the filter, improving convenience.

[0040] In this specific embodiment, addressing the problems of existing unidirectional flow fresh air systems that use a single main unit for centralized air supply, the above solution installs a DC inverter fan at the air outlet of each room. The fresh air purifier and the DC inverter fan use a communication protocol.

[0041] The main unit is automatically woken up when any terminal DC inverter fan starts. When all terminals are turned on, the power is the same as that of the traditional system. However, most of the time the terminal usage rate is not 100%. For example, when the terminal usage rate is 20%, the power is reduced by 80% compared to the traditional system, thus reducing the system's energy consumption. The air volume of each room is controlled individually, with a single room air volume adjustment accuracy of ±5% and stepless adjustment.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A unidirectional flow fresh air purification system, characterized in that: The system includes a fresh air purifier (2) installed on the main duct (1). The fresh air purifier (2) includes a housing (3). The housing (3) is provided with an air inlet (4) and an air outlet (5) connected to the main duct (1). Inside the housing (3), a HEPA filter (6), an activated carbon filter (7) and a centrifugal fan (8) are arranged in sequence along the direction from the air inlet (4) to the air outlet (5). A control panel (9) is provided above the centrifugal fan (8). The main pipe (1) is connected to a branch pipe (10) at the end. Multiple ventilation pipes (11) are connected to the branch pipe (10). The air outlets (5) of the multiple ventilation pipes (11) are respectively arranged in different air supply areas (12). Each ventilation pipe (11) is equipped with a DC variable frequency fan (13). When the DC variable frequency fan (13) is started, the fresh air purifier (2) is started through the communication protocol.

2. The unidirectional flow fresh air purification system according to claim 1, characterized in that: A check valve (14) is provided in front of the DC variable frequency fan (13) in the ventilation duct (11).

3. The unidirectional flow fresh air purification system according to claim 1, characterized in that: The inner wall of the fresh air purifier (2) is fixedly provided with a filter slide rail plate (15), and a number of slide grooves (16) are formed on the filter slide rail plate (15). The HEPA filter (6) and the activated carbon filter (7) are adapted to slide and install on different slide grooves (16).

4. The unidirectional flow fresh air purification system according to claim 3, characterized in that: Both the HEPA filter (6) and the activated carbon filter (7) include a square frame (17) and a filter body (18) disposed within the frame (17). Sponges (19) are provided on three outer walls of the frame (17), and an indicator mark (20) is provided on the other outer wall.

5. A unidirectional flow fresh air purification system according to claim 4, characterized in that: The frame (17) and the sponge (19) are provided with a cloth handle (21), the two ends of which extend out of the outer wall where the indicator mark (20) is located.

Images