Central air conditioning ventilation pipeline self-cleaning device

Abstract

The utility model discloses a central air conditioning ventilation pipeline self -cleaning device, including air conditioning ventilation pipeline main part, the filter shell is installed on air conditioning ventilation pipeline main part, the inside of filter shell is provided with the filter screen of self -cleaning, and the position of filter shell and corresponding filter screen installs gradually the cleaning assembly no.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning ventilation duct cleaning technology, and in particular to a self-cleaning device for central air conditioning ventilation ducts. Background Technology

[0002] In modern buildings, central air conditioning systems have become indispensable, providing comfortable temperatures and air quality for indoor environments. However, over long-term use, dust, particulate matter, and other impurities accumulate in the air, easily forming a layer of dirt inside the ducts and on the filters. This not only reduces ventilation efficiency and increases the energy consumption of the air conditioning system, but can also become a breeding ground for bacteria, mold, and other microorganisms, seriously affecting indoor air quality and even endangering human health.

[0003] In existing technologies, such as the self-cleaning device for ventilation duct filters disclosed in CN220677189U, although an attempt is made to clean the filter to a certain extent through rotating components and cleaning plates, its design still has limitations, making it inconvenient to perform comprehensive and efficient self-cleaning of the filter. Specifically, this device may not be able to effectively remove stubborn dirt deep within the filter, and impurities generated during the cleaning process may not be collected and treated in a timely and effective manner, leading to secondary pollution. In addition, the lack of intelligent monitoring and control mechanisms means that cleaning operations often rely on manual judgment and manual initiation, making it difficult to achieve true automation and intelligent management. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning device for central air conditioning ventilation ducts. Through a PLC controller, the device's operation is intelligently monitored and automatically controlled. Based on the pressure difference signal across the filter screen monitored in real time by a differential pressure sensor, when the pressure difference exceeds a preset value, the device automatically controls a servo motor to drive a cleaning brush for comprehensive and efficient cleaning of the filter screen. Simultaneously, it controls the blower to operate, collecting the cleaned impurities through the blower head and cleaning port into a dust collection bag. This not only improves ventilation efficiency and extends the filter screen's lifespan but also avoids secondary pollution, achieving intelligent and efficient self-cleaning of central air conditioning ventilation ducts.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include: A self-cleaning device for central air conditioning ventilation ducts, comprising: An air conditioning ventilation duct body is provided, on which a filter shell is installed. Inside the filter shell is a self-cleaning filter screen. On the filter shell, corresponding to the position of the filter screen, cleaning component one and cleaning component two for cleaning the filter screen are installed in sequence. A dust collection component is also installed at the bottom of the filter shell.

[0006] The aforementioned self-cleaning device for central air conditioning ventilation ducts includes a cleaning component that includes a mounting bracket fixedly connected to the inner wall of the filter housing. A drive rod is rotatably mounted on the mounting bracket, and a cleaning brush for cleaning the side of the filter screen is mounted at the end of the drive rod corresponding to the position of the filter screen.

[0007] In the aforementioned self-cleaning device for central air conditioning ventilation ducts, a limiting support is fixedly connected to the side of the cleaning brush, a limiting ball is provided on the side of the limiting support, and the limiting support is rotatably connected to the side of the mounting bracket through the limiting ball.

[0008] The aforementioned self-cleaning device for central air conditioning ventilation ducts includes a cleaning component that further comprises a housing fixedly connected to the filter housing. A servo motor is installed inside the housing. A drive wheel is fixedly connected to the output shaft of the servo motor. A driven wheel is fixedly connected to the end of the drive rod away from the cleaning brush. The driven wheel and the drive wheel are connected by a transmission belt.

[0009] The aforementioned self-cleaning device for central air conditioning ventilation ducts includes a second cleaning component comprising a blower fixedly connected to the filter housing, an annular pipe fixedly connected to the bottom of the blower and corresponding to the position of the filter screen, and a plurality of blower heads arranged at equal intervals on the side of the annular pipe.

[0010] The aforementioned self-cleaning device for central air conditioning ventilation ducts includes a dust collection component comprising a cleaning port located at the bottom of the filter housing, and a removable dust collection bag installed at the bottom of the cleaning port.

[0011] In the aforementioned self-cleaning device for central air conditioning ventilation ducts, a mounting plate is fixedly connected to the dust collection bag, and the mounting plate is fixedly connected to the bottom of the filter housing by mounting bolts.

[0012] In the aforementioned self-cleaning device for central air conditioning ventilation ducts, a differential pressure sensor is also installed above the filter housing. The two ends of the differential pressure sensor are respectively installed on the air conditioning ventilation duct body on both sides of the filter housing through connecting pipe one and connecting pipe two.

[0013] The aforementioned self-cleaning device for central air conditioning ventilation ducts includes a PLC controller electrically connected to the differential pressure sensor mounted on the filter housing, and the PLC controller is electrically connected to the servo motor and the blower.

[0014] This utility model has at least the following beneficial effects: 1. This utility model realizes a self-cleaning device for central air conditioning ventilation ducts. The device's operation is intelligently monitored and automatically controlled by a PLC controller. Based on the pressure difference signal on both sides of the filter screen monitored in real time by the differential pressure sensor, when the pressure difference exceeds the preset value, the device automatically controls the servo motor to drive the cleaning brush to perform comprehensive and efficient cleaning of the filter screen. At the same time, it controls the operation of the blower to collect the cleaned impurities in the dust collection bag through the blower head and cleaning port. This not only improves ventilation efficiency and extends the service life of the filter screen, but also avoids secondary pollution, realizing the intelligent and efficient self-cleaning of central air conditioning ventilation ducts.

[0015] 2. Comprehensive and efficient self-cleaning capability: A servo motor drives the drive wheel to rotate, which, in turn, drives the drive rod on the side of the driven wheel to rotate via a transmission belt. This, in turn, drives the cleaning brush to perform a comprehensive and efficient cleaning of the filter surface. This design ensures that dirt on the filter surface can be thoroughly removed, improving ventilation efficiency and extending the filter's lifespan.

[0016] 3. Effective collection and treatment of impurities: Combined with the blower's airflow, the cleaned impurities are blown to the vicinity of the filter screen via the blower head on the side of the annular pipe, and finally collected in the dust collection bag through the cleaning port. This design effectively avoids secondary pollution of the ventilation duct by impurities generated during the cleaning process, maintaining the cleanliness of the ventilation duct.

[0017] 4. Intelligent Monitoring and Automatic Control: Differential pressure sensors are installed on both sides of the filter screen on the main body of the air conditioning ventilation duct, enabling real-time monitoring of the pressure difference across the filter screen. When the pressure difference exceeds a preset value, the signal generated by the differential pressure sensor is transmitted to the PLC controller, which then automatically controls the operation of the servo motor and blower to achieve self-cleaning of the filter screen. This intelligent monitoring and automatic control mechanism makes the cleaning operation more timely and accurate, improving the intelligence level of the central air conditioning system. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the self-cleaning device for central air conditioning ventilation ducts of this utility model; Figure 2 This is a cross-sectional structural diagram of the self-cleaning device for central air conditioning ventilation ducts of this utility model; Figure 3 This is a schematic diagram of the cleaning component one in the self-cleaning device for central air conditioning ventilation ducts of this utility model; Figure 4This is a cross-sectional structural diagram of the cleaning component one in the self-cleaning device for central air conditioning ventilation ducts of this utility model. Figure 5 This is a schematic diagram of the cleaning component two in the self-cleaning device for central air conditioning ventilation ducts of this utility model; Figure 6 This is a schematic diagram of the dust collection component in the self-cleaning device for central air conditioning ventilation ducts of this utility model.

[0019] Explanation of icon numbers: 1. Air conditioning ventilation duct body; 2. Filter housing; 3. Filter screen; 4. Cleaning component one; 5. Cleaning component two; 6. Dust collection component; 7. Differential pressure sensor; 401. Mounting bracket; 4011. Drive lever; 4012. Cleaning brush; 402. Limiting support; 4021. Limiting ball bearing; 403. Housing; 4031. Servo motor; 4032. Drive pulley; 4033. Driven pulley; 4034. Drive belt; 501. Blower; 5011. Circular pipe; 502. Air blower head; 601. Cleaning port; 6011. Dust collection bag; 602, Mounting plate; 6021, Mounting bolts; 701, Connecting pipe one; 7011, Connecting pipe two; 702, PLC controller. Detailed Implementation

[0020] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0021] Please refer to Figures 1 to 6 As shown, an embodiment of the present invention provides a self-cleaning device for a central air conditioning ventilation duct, comprising: an air conditioning ventilation duct body 1, a filter shell 2 installed on the air conditioning ventilation duct body 1, a self-cleaning filter screen 3 disposed inside the filter shell 2, and cleaning components 4 and 5 for cleaning the filter surface of the filter screen 3 sequentially installed on the filter shell 2 and at positions corresponding to the filter screen 3, and a dust collection component 6 installed at the bottom of the filter shell 2. By adopting the above technical solution, the PLC controller 702 realizes intelligent monitoring and automatic control of the device operation. Based on the pressure difference signal on both sides of the filter screen 3 monitored in real time by the differential pressure sensor 7, when the pressure difference exceeds the preset value, it automatically controls the servo motor 4031 to drive the cleaning brush 4012 to perform comprehensive and efficient cleaning of the filter screen 3. At the same time, it controls the blower 501 to operate, and collects the cleaned impurities in the dust collection bag 6011 through the blower head 502 and the cleaning port 601. This not only improves ventilation efficiency and extends the service life of the filter screen 3, but also avoids secondary pollution, realizing the intelligent and efficient self-cleaning of the central air conditioning ventilation duct.

[0022] In order to achieve effective cleaning of the side of the filter screen 3, in this embodiment: the cleaning component 4 includes a mounting bracket 401 fixedly connected to the inner wall of the filter shell 2. A drive rod 4011 is rotatably mounted on the mounting bracket 401. A cleaning brush 4012 for cleaning the side of the filter screen 3 is installed at the end of the drive rod 4011 and at the position corresponding to the filter screen 3. This design allows the cleaning brush 4012 to act directly on the surface of the filter screen 3 and effectively remove dirt and impurities attached to the filter screen 3 through rotational movement.

[0023] To ensure the stability of the cleaning brush 4012 during rotation and reduce friction with the mounting bracket 401, in this embodiment, a limiting support column 402 is fixedly connected to the side of the cleaning brush 4012. The side of the limiting support column 402 is provided with a limiting ball 4021, and the limiting support column 402 is rolledly connected to the side of the mounting bracket 401 through the limiting ball 4021. The design of the limiting ball 4021 not only reduces frictional resistance but also improves the smoothness and stability of the rotation of the cleaning brush 4012.

[0024] To provide a stable driving force for the cleaning brush 4012, in this embodiment: the cleaning component 4 also includes a housing 403 fixedly connected to the filter housing 2. A servo motor 4031 is installed inside the housing 403. A drive wheel 4032 is fixedly connected to the output shaft of the servo motor 4031. A driven wheel 4033 is fixedly connected to the end of the drive rod 4011 away from the cleaning brush 4012. The driven wheel 4033 and the drive wheel 4032 are connected by a transmission belt 4034. Driven by the servo motor 4031, the cleaning brush 4012 is automatically rotated, improving cleaning efficiency and convenience.

[0025] To assist the cleaning brush 4012 in cleaning the filter screen 3 more thoroughly, especially in removing residual fine impurities, in this embodiment: the cleaning component 2 5 includes a blower 501 fixedly connected to the filter shell 2. An annular tube 5011 is fixedly connected to the bottom of the blower 501 and at the position corresponding to the filter screen 3. Several blower heads 502 are installed on the side of the annular tube 5011 at equal intervals. The blower 501 blows strong air directly onto the surface of the filter screen 3 through the annular tube 5011 and the blower heads 502, effectively blowing away and removing residual impurities.

[0026] In order to collect and process impurities generated during the cleaning process and prevent secondary pollution, in this embodiment, the dust collection assembly 6 includes a cleaning port 601 opened at the bottom of the filter shell 2. A detachable dust collection bag 6011 is installed at the bottom of the cleaning port 601. An mounting plate 602 is fixedly connected to the dust collection bag 6011, and the mounting plate 602 is fixedly connected to the bottom of the filter shell 2 by mounting bolts 6021. The design of the dust collection bag 6011 enables impurities to be effectively collected and processed, maintaining the cleanliness of the ventilation duct.

[0027] To achieve intelligent control of the self-cleaning of the filter screen 3 and improve the timeliness and accuracy of cleaning, in this embodiment: a differential pressure sensor 7 is also provided above the filter shell 2. The two ends of the differential pressure sensor 7 are respectively installed on the air conditioning ventilation duct body 1 on both sides of the filter shell 2 through connecting pipe 1 701 and connecting pipe 2 7011. A PLC controller 702 electrically connected to the differential pressure sensor 7 is also installed on the filter shell 2. The PLC controller 702 is electrically connected to the servo motor 4031 and the blower 501. The differential pressure sensor 7 can monitor the pressure difference on both sides of the filter screen 3 in real time and transmit the signal to the PLC controller 702, thereby automatically controlling the operation of the servo motor 4031 and the blower 501 to achieve self-cleaning of the filter screen 3.

[0028] The working principle of this utility model is as follows: After the air conditioning ventilation duct has been running for a period of time, a certain amount of dirt and impurities will accumulate on the filter screen 3, resulting in an increase in the pressure difference between the two sides of the filter screen 3. At this time, the differential pressure sensor 7 monitors this change in real time through the connecting pipe 1 701 and the connecting pipe 2 7011, and transmits the generated signal to the PLC controller 702. After receiving the signal, the PLC controller 702 automatically controls the servo motor 4031 to start, driving the drive wheel 4032 to rotate. Under the transmission action of the transmission belt 4034, the driven wheel 4033 rotates accordingly, thereby driving the drive rod 4011 and the cleaning brush 4012 to rotate. During the rotation, the cleaning brush 4012 cleans the filter surface of the filter screen 3, effectively removing the dirt and impurities attached to the filter screen 3. At the same time, the PLC controller 702 also controls the blower 501 to start, blowing strong air directly onto the surface of the filter screen 3 through the blower head 502 on the side of the annular pipe 5011, further dispersing and removing residual impurities. These impurities are collected in the dust collection bag 6011 through the cleaning port 601 under the action of wind, realizing centralized treatment of impurities. When the pressure difference on both sides of the filter screen 3 returns to the normal range, the differential pressure sensor 7 transmits the signal to the PLC controller 702 again. The PLC controller 702 then automatically controls the servo motor 4031 and the blower 501 to stop operating, completing one self-cleaning process. This process can be repeated to achieve self-cleaning of the central air conditioning ventilation duct.

[0029] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A self-cleaning device for central air conditioning ventilation ducts, comprising an air conditioning ventilation duct body (1), characterized in that, A filter shell (2) is installed on the main body (1) of the air conditioning ventilation duct. A self-cleaning filter screen (3) is provided inside the filter shell (2). A cleaning component one (4) and a cleaning component two (5) for cleaning the filter surface of the filter screen (3) are installed on the filter shell (2) and corresponding to the position of the filter screen (3). A dust collection component (6) is also installed at the bottom of the filter shell (2).

2. The self-cleaning device for central air conditioning ventilation ducts according to claim 1, characterized in that: The cleaning component 1 (4) includes a mounting bracket (401) fixedly connected to the inner wall of the filter housing (2), a drive rod (4011) is rotatably mounted on the mounting bracket (401), and a cleaning brush (4012) for cleaning the side of the filter screen (3) is installed at the end of the drive rod (4011) and at the position corresponding to the filter screen (3).

3. A self-cleaning device for central air conditioning ventilation ducts according to claim 2, characterized in that: The cleaning brush (4012) is fixedly connected to a limiting support (402) on its side. The limiting support (402) is provided with a limiting ball (4021) on its side, and the limiting support (402) is tactilely connected to the side of the mounting bracket (401) through the limiting ball (4021).

4. A self-cleaning device for central air conditioning ventilation ducts according to claim 3, characterized in that: The cleaning component (4) further includes a housing (403) fixedly connected to the filter housing (2). A servo motor (4031) is installed inside the housing (403). A drive wheel (4032) is fixedly connected to the output shaft of the servo motor (4031). A driven wheel (4033) is fixedly connected to the end of the drive rod (4011) away from the cleaning brush (4012). The driven wheel (4033) and the drive wheel (4032) are connected by a transmission belt (4034).

5. A self-cleaning device for central air conditioning ventilation ducts according to claim 4, characterized in that: The second cleaning component (5) includes a blower (501) fixedly connected to the filter housing (2). A ring tube (5011) is fixedly connected to the bottom of the blower (501) and at the position corresponding to the filter screen (3). A number of blower heads (502) arranged at equal intervals are installed on the side of the ring tube (5011).

6. A self-cleaning device for central air conditioning ventilation ducts according to claim 5, characterized in that: The dust collection assembly (6) includes a cleaning port (601) opened at the bottom of the filter housing (2), and a removable dust collection bag (6011) is installed at the bottom of the cleaning port (601).

7. A self-cleaning device for central air conditioning ventilation ducts according to claim 6, characterized in that: An mounting plate (602) is fixedly connected to the dust collection bag (6011), and the mounting plate (602) is fixedly connected to the bottom of the filter shell (2) by mounting bolts (6021).

8. A self-cleaning device for central air conditioning ventilation ducts according to claim 7, characterized in that: A differential pressure sensor (7) is also provided above the filter housing (2). The two ends of the differential pressure sensor (7) are respectively installed on the air conditioning ventilation duct body (1) on both sides of the filter housing (2) through connecting pipe one (701) and connecting pipe two (7011).

9. A self-cleaning device for central air conditioning ventilation ducts according to claim 8, characterized in that: The filter housing (2) is also equipped with a PLC controller (702) electrically connected to the differential pressure sensor (7), and the PLC controller (702) is electrically connected to the servo motor (4031) and the blower (501).

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