A rotary air door structure for air volume adjustment of a refrigerator

Abstract

The utility model belongs to refrigerator air door technical field discloses a kind of rotary air door structure for refrigerator air volume regulation, effectively solve the problem that traditional baffle type air door structure cannot accurately adjust ventilation area.The air door structure includes valve body, fan blade assembly and drive motor, valve body is cylindrical, valve body is installed in the ventilation duct of refrigerator, multiple valve holes for airflow passing are equipped on the lateral wall of valve body, multiple valve holes are evenly distributed along circumference;Fan blade assembly is made of fan-shaped blade corresponding with the number of valve hole, each fan-shaped blade is fixed to form rotating structure by center shaft, center shaft is connected with the output shaft of drive motor, drive motor is connected with the control system of refrigerator, the edge of the surface of fan-shaped blade, which contacts with the inner wall of valve body, is provided with groove, sealing element is arranged in the groove.The utility model is conducive to realizing air volume stepless regulation, improving refrigerator temperature control precision, facilitating freezing, refrigeration and variable temperature mode free switching.

Description

Technical Field

[0001] This utility model belongs to the field of refrigerator air damper technology, specifically relating to a rotary air damper structure for refrigerator air volume adjustment, and more particularly to a refrigerator air damper that controls the ventilation area by rotating fan blades. Background Technology

[0002] In current refrigerator technology, dampers are primarily used to control airflow exchange between the refrigerator compartment, freezer compartment, or variable temperature compartment to achieve temperature regulation. Traditional refrigerator damper structures typically employ a simple baffle-type design, using a motor or electromagnetic drive to open and close. This type of damper includes a baffle and a drive mechanism; the baffle moves between an open and closed position to control airflow. This baffle-type damper structure can only achieve two states: fully open or fully closed, making it impossible to precisely adjust the ventilation area. This results in inaccurate temperature control within the refrigerator and makes it difficult to freely switch between freezing, refrigeration, or variable temperature modes. Furthermore, traditional baffle-type damper structures are prone to malfunctions such as poor sealing, jamming, or motor overload during long-term use, affecting the refrigerator's energy efficiency and reliability.

[0003] Another common damper structure is the louvered damper structure, which adjusts the airflow by changing the angle of multiple blades. However, it has a complex structure, high manufacturing cost, and dust or frost easily accumulates between the blades, leading to unstable operation and reduced sealing effect. Utility Model Content

[0004] The purpose of this invention is to provide a rotary damper structure for adjusting the airflow of a refrigerator, which effectively solves the problem that traditional baffle-type damper structures cannot accurately adjust the ventilation area.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rotary damper structure for regulating the air volume of a refrigerator, including a valve body, a fan blade assembly and a drive motor. The valve body is cylindrical and is installed in the ventilation duct of the refrigerator. The side wall of the valve body is provided with multiple valve holes for airflow, and the multiple valve holes are evenly distributed along the circumference.

[0006] The fan blade assembly consists of fan-shaped blades, which are used to control the ventilation area of ​​the valve holes, and the number of fan-shaped blades is equivalent to the number of valve holes. Each fan-shaped blade is fixed by a central shaft to form a rotating structure. The central shaft is connected to the output shaft of the drive motor. The drive motor is connected to the control system of the refrigerator. The edge of the surface of the fan-shaped blade that contacts the inner wall of the valve body is provided with a groove, and a sealing element is provided in the groove.

[0007] Furthermore, the fan blade assembly is located inside the valve body, while the drive motor is located outside the valve body.

[0008] Furthermore, there are four valve holes and four sector blades.

[0009] Furthermore, the valve orifice is arc-shaped or circular.

[0010] Furthermore, the seal is made of rubber or silicone material.

[0011] Furthermore, the drive motor is mounted on the outside of the valve body via a mounting bracket.

[0012] Furthermore, the drive motor is a stepper motor or a DC motor.

[0013] Furthermore, the valve body is made of engineering plastic.

[0014] Furthermore, the fan-shaped blades are made of plastic.

[0015] Furthermore, the sealing element is a sealing ring or a sealing strip.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are: (1) This utility model continuously adjusts the valve hole size by rotating the fan blade assembly to achieve stepless air volume adjustment, improve the temperature control accuracy of the refrigerator, and facilitate the free switching of the refrigerator's freezing, refrigeration and variable temperature modes.

[0017] (2) The valve hole and fan blade assembly of this utility model has a compact structure, fewer parts, low manufacturing cost, and is easy to install and maintain. By adopting the design of sealing elements and fan blades, it is ensured that there is no leakage when the fan blades cover the valve hole, reducing the loss of cold air and improving energy efficiency.

[0018] (3) This utility model is driven by a drive motor, which makes it run smoothly without impact or jamming, thus extending its service life and reducing maintenance requirements. Furthermore, due to the small rotational inertia of the fan blade assembly, this utility model responds to temperature changes faster than traditional baffles, thus improving the user experience. Attached Figure Description

[0019] Figure 1 This is a side view of the present invention with the valve orifice fully open.

[0020] Explanation of reference numerals in the attached drawings: Valve body-1; Valve hole-2; Sector blade-3; Central shaft-4. Detailed Implementation

[0021] Example 1: A rotary damper structure for regulating airflow in a refrigerator, such as... Figure 1 As shown, it includes valve body 1, fan blade assembly and drive motor.

[0022] Valve body 1 is a cylindrical structure and is installed in the refrigerator's ventilation duct. For example... Figure 1As shown, the valve body 1 has four arc-shaped valve holes 2 for airflow on its side wall, and the four valve holes 2 are evenly distributed along the circumference. In this embodiment, the valve body 1 is made of engineering plastic (such as ABS or PP).

[0023] The fan blade assembly is located inside valve body 1, such as Figure 1 As shown, the fan blade assembly consists of four fan-shaped blades 3 for controlling the ventilation area of ​​the valve orifice 2. The four fan-shaped blades 3 are fixed by a central shaft 4 to form a rotating structure. The fan-shaped blades 3 are made of lightweight, high-strength plastic. The central shaft 4 is connected to the output shaft of the drive motor, which is mounted on the outside of the valve body 1 via a mounting bracket. The drive motor is connected to the refrigerator's control system for precisely controlling the rotation angle of the fan blade assembly. In this embodiment, the drive motor is a stepper motor or a DC motor.

[0024] When the drive motor is running, it drives the fan blade assembly to rotate, thereby changing the overlapping area of ​​the four fan-shaped blades 3 and the valve hole 2 on the valve body 1. By controlling the rotation angle (e.g., 0° to 45°), the valve hole 2 can be continuously adjusted from fully open to fully closed: (1) When the fan-shaped blades 3 completely cover the valve hole 2, the ventilation area is zero. (2) When the fan-shaped blades 3 partially cover the valve hole 2, the ventilation area increases with the increase of the rotation angle, and the air volume increases accordingly. (3) When the fan-shaped blades 3 do not completely cover the valve hole 2, the ventilation area is at its maximum. By controlling the rotation angle of the fan blade assembly, the air volume can be precisely controlled, thereby adjusting the temperature inside the box and realizing the switching between freezing, refrigeration, or variable temperature modes.

[0025] To ensure airtightness when the fan-shaped blade 3 contacts the inner wall of the valve body 1, a groove is provided at the edge of the surface of the fan-shaped blade 3 that contacts the inner wall of the valve body 1, and a sealing element is provided in the groove. In this embodiment, the sealing element is made of rubber or silicone material, and the sealing element can be an annular sealing ring or a sealing strip.

[0026] The working principle of this invention is as follows: the refrigerator's control system sends a command to the drive motor based on the temperature sensor signal inside the refrigerator, controlling the rotation angle of the fan blade assembly. During the rotation of the fan blade assembly, the overlapping area between the fan-shaped blades 3 and the valve hole 2 changes continuously, thereby adjusting the ventilation area.

[0027] This invention is driven by a motor, resulting in smooth operation without impact or jamming, extending its service life and reducing maintenance requirements. Furthermore, due to the low rotational inertia of the fan blade assembly, this invention responds to temperature changes faster than traditional baffles, improving the user experience.

[0028] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A rotary damper structure for regulating airflow in a refrigerator, characterized in that, The device includes a valve body, a fan blade assembly, and a drive motor. The valve body is cylindrical and is installed in the ventilation duct of the refrigerator. The side wall of the valve body is provided with multiple valve holes for airflow, and the multiple valve holes are evenly distributed along the circumference. The fan blade assembly consists of fan-shaped blades, which are used to control the ventilation area of ​​the valve holes, and the number of fan-shaped blades is equivalent to the number of valve holes. Each fan-shaped blade is fixed by a central shaft to form a rotating structure. The central shaft is connected to the output shaft of the drive motor. The drive motor is connected to the control system of the refrigerator. The edge of the surface of the fan-shaped blade that contacts the inner wall of the valve body is provided with a groove, and a sealing element is provided in the groove.

2. The rotary damper structure for refrigerator airflow adjustment according to claim 1, characterized in that, The fan blade assembly is located inside the valve body, and the drive motor is located outside the valve body.

3. A rotary damper structure for refrigerator airflow adjustment according to claim 2, characterized in that, There are four valve holes and four sector blades.

4. A rotary damper structure for refrigerator airflow adjustment according to claim 3, characterized in that, The valve orifice is arc-shaped or circular.

5. A rotary damper structure for refrigerator airflow adjustment according to claim 4, characterized in that, The seal is made of rubber or silicone.

6. A rotary damper structure for refrigerator airflow adjustment according to claim 5, characterized in that, The drive motor is mounted on the outside of the valve body via a mounting bracket.

7. A rotary damper structure for refrigerator airflow adjustment according to claim 6, characterized in that, The drive motor is a stepper motor or a DC motor.

8. A rotary damper structure for refrigerator airflow adjustment according to claim 7, characterized in that, The valve body is made of engineering plastic.

9. A rotary damper structure for refrigerator airflow adjustment according to claim 8, characterized in that, The fan-shaped blades are made of plastic.

10. A rotary damper structure for refrigerator airflow adjustment according to claim 9, characterized in that, The sealing element is a sealing ring or a sealing strip.

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