A swing leaf air inlet structure

Abstract

The utility model discloses a swing leaf type air inlet structure relates to the technical field of air pipe elbow. This structure includes the cavity, and the outer surface of cavity is equipped with drive motor, and the drive shaft of drive motor extends to the cavity through the inner wall of this cavity, and the lower surface of cavity is equipped with lower opening, and the swing leaf for closing lower opening is equipped in the cavity, and the both ends of swing leaf are equipped with drive shaft and pivot respectively, and drive shaft is connected to drive shaft, and the inner wall of cavity is equipped with the spigot, and the pivot is placed in the spigot, and the inner wall place of cavity is equipped with the limit block for limiting swing leaf rotating position. This structure rotates through motor drive swing leaf, realizes the opening and closing control of air port, has the advantages such as reasonable structure, control nimble, air volume stable, is applicable to the ceiling air pipe system.

Description

Technical Field

[0001] This utility model relates to the field of duct elbow technology, and in particular to a louvered air inlet structure. Background Technology

[0002] In ventilation and air conditioning systems, air vents are key components connecting ducts to indoor spaces, and their performance directly affects airflow distribution and overall system energy efficiency. Traditional circular air vents often employ fixed blades or manually adjustable blade structures, which suffer from inconvenient adjustment, poor sealing, and inaccurate airflow guidance. Especially in ceiling-mounted installations, air vents must balance aesthetics and functionality, placing higher demands on structural compactness, ease of installation, and controllability.

[0003] In existing technologies, such as the ceiling duct elbow disclosed in Chinese patent application CN202422600202.1, the working principle is to install an exhaust fan on the horizontal duct to generate negative pressure, thereby drawing open the blades inside the ceiling ventilation interface. However, this structure has a significant drawback: the opening of the blades depends entirely on the wind pressure, and the opening angle cannot be actively and precisely controlled. Therefore, when the wind pressure fluctuates, the actual opening range of the blades will change accordingly, resulting in unstable airflow and affecting the efficiency and reliability of the ventilation system. Therefore, it is necessary to provide a reasonably structured, flexibly controllable, well-sealed air outlet device suitable for ventilation systems to overcome the shortcomings of the prior art. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a louvered air inlet structure that is structurally sound, flexibly controllable, and provides stable airflow.

[0005] This utility model also provides a swivel-type air inlet structure, including a mounting housing. A drive motor is mounted on the outer wall of the mounting housing. The drive shaft of the drive motor extends through the inner wall of the mounting housing into the mounting housing. The mounting housing is provided with an air inlet. Inside the mounting housing, there is a swivel driven by the drive motor and used to open, close, or partially close the air inlet. Both ends of the swivel are respectively provided with a driven shaft and a rotating shaft. The drive shaft of the drive motor is connected to the driven shaft of the swivel. An insertion port is provided on the inner wall of the mounting housing, and the rotating shaft is placed in the insertion port.

[0006] Furthermore, the inner wall of the mounting housing is provided with a limiting block for restricting the rotation position of the pendulum.

[0007] Furthermore, it also includes a duct adapter, which is connected to the mounting housing via a connecting cover plate.

[0008] Furthermore, the upper surface of the connecting cover plate is provided with a fastener seat, the fastener seat is provided with a fastening opening, and the duct adapter is provided with a fastening block that matches the fastening opening. The duct adapter is installed on the connecting cover plate by fastening the fastening block into the fastening opening.

[0009] Furthermore, the buckle protrudes outward and is disposed on the bottom outer wall of the duct adapter. After the buckle is engaged with the buckle opening, the buckle seat surrounds the bottom outer wall of the duct adapter.

[0010] Furthermore, the connecting cover is provided with a ventilation opening, which connects the mounting housing and the duct adapter.

[0011] Furthermore, the air inlet of the mounting housing is provided with a fixing ring for mounting to the ceiling, and the mounting housing is mounted on the fixing ring.

[0012] Furthermore, it also includes an outer cover panel, which is mounted on the retaining ring.

[0013] Furthermore, the fixing ring is installed on the ceiling by a first screw, and the fixing ring is connected to the bottom surface of the mounting housing by a second screw. The outer cover panel covers the first screw and the second screw.

[0014] Furthermore, the outer cover panel is provided with an air guide arc located at the front end of the air inlet.

[0015] The beneficial effects of this utility model are as follows.

[0016] I. This utility model directly drives the blades to rotate via a drive motor, so that the blade opening is not affected by wind pressure fluctuations. This effectively avoids the decrease in ventilation efficiency and the instability of system operation caused by the "sometimes large and sometimes small" opening range of the blades, significantly improving the overall efficiency and operational reliability of the ventilation system, thereby achieving stable and precise regulation of airflow volume.

[0017] Second, the oscillating blades, driven by the motor, can tightly close the air inlet, effectively cutting off the airflow channel, significantly reducing air leakage in the closed state, improving the sealing of the ventilation system, which is conducive to saving energy and improving the overall energy efficiency of the system.

[0018] Third, this structure adopts a modular design. The components, such as the mounting housing, cover plate, duct adapter, and fixing ring, are connected by snaps, screws, and bolts. The structure is compact and reasonable, which not only saves installation space, but also makes the assembly process simple and quick and the connection firm. It is especially suitable for ceiling recessed installation.

[0019] Fourth, this structure precisely controls the rotation angle range of the swing blades by setting limit blocks on the inner wall of the mounting housing, avoiding collisions between the swing blades and other components or motor overload due to excessive rotation, thus protecting the drive mechanism and extending the service life of the air outlet. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model in use.

[0021] Figure 2 for Figure 1 Another structural diagram from another angle.

[0022] Figure 3 for Figure 1 A schematic diagram of its decomposed structure.

[0023] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0024] Figure 5 A schematic diagram of the connection structure between the drive motor, mounting housing, swing blades, and connecting cover.

[0025] Figure 6 for Figure 5 A schematic diagram of its decomposed structure.

[0026] Figure 7 A schematic diagram of the connection structure between the drive motor, the mounting housing, and the connecting cover.

[0027] Figure 8 This is a schematic diagram of a duct adapter structure.

[0028] As shown in the attached diagram, the following components are labeled: Ceiling 1, Mounting port 101, Drive motor 2, Drive shaft 201, Duct adapter 3, Fastener 301, Reinforcing rib 302, Mounting housing 4, Limiting block 401, Insert 402, Air inlet 403, Connecting cover plate 5, Fastener 501, Fastener 502, Ventilation outlet 503, Outer cover panel 6, Air guide arc 61, Oscillating blade 7, Connecting driven shaft 701, Rotating shaft 702, Fixing ring 8, First screw 9, Second screw 10. Detailed Implementation

[0029] See Figures 1 to 8 The following is a specific embodiment of the louvered air inlet structure provided by this utility model.

[0030] The oscillating air inlet structure of this embodiment mainly includes a mounting housing 4, a drive motor 2, an oscillating blade 7, a connecting cover plate 5, a duct adapter 3, an outer cover panel 6, and a fixing ring 8.

[0031] More specifically: A drive motor 2 is mounted on the outer wall of the mounting housing 4. The drive shaft 201 of the drive motor 2 extends through the inner wall of the mounting housing 4 into the housing 4. The mounting housing 4 has an air inlet 403. Inside the mounting housing 4 is a vane 7 driven by the drive motor 2 to open, close, or partially close the air inlet 403. Here, the vane 7 being driven by the drive motor 2 to open, close, or partially close the air inlet 403 refers to a process that can achieve opening, closing, or partial closing in different states. The two ends of the vane 7 are respectively provided with a driven shaft 701 and a rotating shaft 702. The drive shaft 201 of the drive motor 2 is connected to the driven shaft 701 of the vane 7. The inner wall of the mounting housing 4 has a socket 402, and the rotating shaft 702 is placed inside the socket 402. A limiting block 401 is provided on the inner wall of the mounting housing 4 to limit the rotational position of the vane 7. The duct adapter 3 is connected to the mounting housing 4 via a connecting cover plate 5. The upper surface of the connecting cover plate 5 is provided with a fastener 501, and the fastener 501 is provided with a fastening opening 502. The duct adapter 3 is provided with a fastening block 301 that matches the fastening opening 502. The duct adapter 3 is installed on the connecting cover plate 5 by fastening the fastening block 301 into the fastening opening 502. The fastening block 301 protrudes outward from the bottom outer wall of the duct adapter 3. After the fastening block 301 is fastened with the fastening opening 502, the fastener 501 surrounds the bottom outer wall of the duct adapter 3. The connecting cover plate 5 is provided with a ventilation opening 503, which connects the mounting housing 4 and the duct adapter 3. The air inlet 403 of the mounting housing 4 is provided with a fixing ring 8 for installation with the ceiling 1. The mounting housing 4 is installed on the fixing ring 8. An outer cover panel 6 is provided, which covers and is installed on the fixing ring 8. The fixing ring 8 is mounted on the ceiling 1 by the first screw 9, and the fixing ring 8 is connected to the bottom surface of the mounting housing 4 by the second screw 10. The outer cover panel 6 covers the first screw 9 and the second screw 10. The outer cover panel 6 is provided with an air guide arc 61 located at the front end of the air inlet 403.

[0032] The mounting housing 4 is a cylindrical structure, made of galvanized steel sheet with a thickness of 0.8 to 1.2 mm, welded or injection molded from plastic. Its inner diameter is 150 to 300 mm and its height is 80 to 120 mm. The side wall of the mounting housing 4 is provided with a motor mounting hole. The diameter of the motor mounting hole matches the drive shaft 201 of the drive motor 2 and is fixedly connected by M4 stainless steel screws.

[0033] The drive motor 2 is preferably a 24V DC geared motor with a rated torque of 2 to 5 N•m and a speed of 10 to 20 r / min. The drive shaft 201 of the drive motor 2 is a D-shaped shaft with a diameter of 6 mm, which is connected to the driven shaft 701 of the oscillating vane 7 through a D-shaped hole to ensure no relative rotation. The mating length between the driven shaft 701 and the drive shaft 201 is 15 to 25 mm, and the mating tolerance is H7 / f6.

[0034] The pivot shaft 702 of the oscillating blade 7 is a 5mm diameter optical shaft that is inserted into the socket 402 on the inner wall of the mounting housing 4. The socket 402 is a blind hole with a depth of 8 to 12mm and a diameter of 5.1 to 5.3mm, which forms a clearance fit with the pivot shaft 702. The clearance is 0.1 to 0.3mm, ensuring that the oscillating blade 7 can rotate smoothly without producing excessive wobbling.

[0035] The limiting block 401 has a height of 5 to 8 mm and a width of 10 to 15 mm, and is manufactured by integral stamping with the mounting housing 4. The limiting block 401 is set at the 0° position of the rotation path of the swing blade 7. When the swing blade 7 rotates to the horizontal closed position, its side surface makes surface contact with the contact surface of the limiting block 401, and the contact area is not less than 50 mm², ensuring reliable limiting.

[0036] The edge of the oscillating blade 7 is provided with a silicone sealing strip with a semi-circular cross section and a height of 2 to 3 mm. When the oscillating blade 7 rotates to the horizontal closed position, the sealing strip forms a compression seal with the edge of the air inlet 403, with a compression amount of 0.5 to 1 mm, to ensure airtightness.

[0037] The retaining ring 8 is connected to the outer cover panel 6 by eight evenly distributed snap fasteners, with a snap fastening depth of 3 to 5 mm. The first screw 9 and the second screw 10 are both M5 stainless steel screws, with lengths of 30 mm and 40 mm respectively. The diameter of the mounting opening 101 of the ceiling 1 is 2 to 4 mm larger than the outer diameter of the mounting housing 4, facilitating installation and adjustment.

[0038] The entire air vent structure of this utility model is installed on the ceiling 1 in the following manner: First, an installation opening 101 is prefabricated on the ceiling 1; then, the installation housing 4, which is equipped with the drive motor 2 and the oscillating blade 7, is connected to the air duct adapter 3 through the connecting cover plate 5 and placed above the ceiling; subsequently, the fixing ring 8 is installed on the bottom of the installation housing 4 using the second screw 10. During this process, the outer fold of the fixing ring 8 covers the lower periphery of the installation opening 101. At the same time, the first screw 9 is used to pass through the lower outer edge of the fixing ring 8 from bottom to top to fix the fixing ring 8 on the bottom surface of the ceiling 1; finally, the outer cover panel 6 is fixed to the fixing ring 8 by a snap-fit ​​method. The outer cover panel 6 serves to decorate and cover the first screw 9 and the second screw 10, thereby realizing the installation of the air vent structure of this utility model on the ceiling 1.

[0039] The drive motor 2 is connected to an external controller via UL1007 22AWG wiring. The controller can receive 0 to 10V analog signals or Modbus RTU communication signals to achieve precise control of the opening degree. The control system can integrate temperature and humidity sensors to achieve automatic adjustment of environmental parameters. The system also includes a control system comprising a controller and a sensor module. The controller is electrically connected to the drive motor 2 and is used to control the operation of the drive motor 2. The sensor module is connected to the controller and is used to detect environmental parameters.

[0040] The control system also includes a communication module connected to the controller for receiving external control signals. The communication module supports analog signal input or digital communication protocols. The sensor module includes at least one of a temperature sensor and a humidity sensor. The controller controls the drive motor 2 via a PWM signal. The control system also includes a position feedback unit for detecting the rotational position of the blade 7. The controller uses a microprocessor-based control unit (e.g., an STM32F103 series MCU) integrating an analog-to-digital converter (ADC) and a universal asynchronous transceiver (UART). The controller is connected to the drive motor 2 via UL1007 22AWG wires and outputs a PWM pulse width modulation signal to control the motor's speed and direction, thereby achieving precise angle adjustment of the blade 7. The PWM signal frequency is 1kHz to 5kHz, the duty cycle adjustment range is 0% to 100%, and the corresponding blade rotation angle is 0° to 90°. The sensor module includes a temperature sensor (e.g., DS18B20) and a humidity sensor (e.g., DHT11), installed inside the mounting housing 4 or near the air vent, for detecting ambient temperature and humidity. The sensor module communicates with the controller via I2C or a single-bus protocol, with a sampling frequency of 1Hz to 10Hz. The communication module supports the Modbus RTU protocol via an RS485 interface or receives 0-10V control signals via an analog input interface. The controller calculates the target opening degree of the swing blades based on a preset program or the received signals and drives the motor to rotate to the corresponding position. For example, when the temperature sensor detects that the ambient temperature is higher than a set threshold (e.g., 25°C), the controller controls the motor to open the swing blades to their maximum opening; when the temperature is lower than the set threshold, the controller controls the motor to close the swing blades. The control program also includes a swing blade position feedback mechanism, which uses an encoder built into the motor or a limit switch in the mounting housing to detect the swing blade position in real time, ensuring position accuracy and preventing overload.

[0041] In addition, the control system can integrate a timing module to enable timed opening and closing of the air vents; or it can connect to an IoT platform via a network interface (such as Wi-Fi or Ethernet) to achieve remote monitoring and data analysis. The control system's power module provides 24V DC power, which complies with safety regulations.

[0042] When an opening command is received, drive motor 2 rotates clockwise, causing the swing blade 7 to rotate from the horizontal closed position to the vertical open position at a speed of 15° / s. When the swing blade 7 rotates to 75 to 90°, its side contacts the opening limit block, and drive motor 2 stops rotating. When a closing command is received, drive motor 2 rotates counterclockwise, causing the swing blade 7 to return to the horizontal position. At this time, the sealing strip is tightly fitted with the edge of the air inlet 403, achieving a complete seal.

[0043] The surface of the duct adapter 3 is provided with reinforcing ribs 302 to improve the rigidity of the duct adapter 3. The air guide arc 61 at the front end of the air inlet 403 helps air to quickly enter the air inlet 403 along the surface of the air guide arc 61, reducing the impact of wind resistance.

[0044] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A louvered air inlet structure, comprising a mounting housing (4), characterized in that, The outer wall of the mounting housing (4) is equipped with a drive motor (2). The drive shaft (201) of the drive motor (2) extends through the inner wall of the mounting housing (4) into the mounting housing (4). The mounting housing (4) is provided with an air inlet (403). Inside the mounting housing (4) is a swivel (7) driven by the drive motor (2) and used to open, close or partially close the air inlet (403). The two ends of the swivel (7) are respectively provided with a driven shaft (701) and a rotating shaft (702). The drive shaft (201) of the drive motor (2) is connected to the driven shaft (701) of the swivel (7). The inner wall of the mounting housing (4) is provided with a socket (402), and the rotating shaft (702) is placed in the socket (402).

2. The louvered air inlet structure according to claim 1, characterized in that: The inner wall of the mounting housing (4) is provided with a limiting block (401) for limiting the rotation position of the pendulum (7).

3. The louvered air inlet structure according to claim 1, characterized in that: It also includes a duct adapter (3), which is connected to the mounting housing (4) via a connecting cover plate (5).

4. The louvered air inlet structure according to claim 3, characterized in that: The upper surface of the connecting cover plate (5) is provided with a fastener (501), the fastener (501) is provided with a fastening opening (502), and the air duct adapter (3) is provided with a fastening block (301) that matches the fastening opening (502). The air duct adapter (3) is installed on the connecting cover plate (5) by fastening the fastening block (301) into the fastening opening (502).

5. The louvered air inlet structure according to claim 4, characterized in that: The buckle (301) is protruding and set on the bottom outer wall of the duct adapter (3). After the buckle (301) and the buckle opening (502) are fastened together, the buckle seat (501) surrounds the bottom outer wall of the duct adapter (3).

6. The louvered air inlet structure according to claim 5, characterized in that: The connecting cover plate (5) is provided with a vent (503), which connects the mounting housing (4) and the duct adapter (3).

7. The louvered air inlet structure according to any one of claims 1 to 6, characterized in that: The air inlet (403) of the mounting housing (4) is provided with a fixing ring (8) for mounting to the ceiling (1), and the mounting housing (4) is mounted on the fixing ring (8).

8. The louvered air inlet structure according to claim 7, characterized in that: It also includes an outer cover panel (6), which is mounted on the fixing ring (8).

9. The louvered air inlet structure according to claim 8, characterized in that: The fixing ring (8) is installed on the ceiling (1) by the first screw (9), and the fixing ring (8) is connected to the bottom surface of the mounting housing (4) by the second screw (10). The outer cover panel (6) covers the first screw (9) and the second screw (10).

10. The louvered air inlet structure according to claim 8, characterized in that: The outer cover panel (6) is provided with an air guide arc (61) located at the front end of the air inlet.

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