Impedance adjusting door body structure for indoor ventilation network airflow distribution

Abstract

The invention relates to the technical field of building ventilation and doors and windows, and provides an impedance adjusting door body structure for indoor ventilation network airflow distribution, which comprises a door plate body, a through hole is formed in the door plate body, and the through hole is positioned in the middle part of the door plate body in the height direction; the impedance regulator is fixedly arranged in the through hole and is used for regulating the impedance of airflow passing through the door body; and the driving unit is used for driving the impedance regulator to act so as to change the area of the airflow channel. The door body structure serves as an adjustable impedance element in a ventilation network, and the air distribution and pressure gradient distribution of the whole network can be more flexibly and finely optimized through cooperative regulation and control of the door body structure, a fresh air opening, an exhaust fan and the like. The excessive dependence on the opening area of the fresh air opening and the air pressure of the exhaust fan is reduced, and a key hardware foundation is provided for constructing an efficient, stable and self-adaptive intelligent ventilation system.

Description

Technical Field

[0001] This invention relates to the field of building ventilation and window and door technology, and more specifically, to an impedance-adjustable door structure for airflow distribution in an indoor ventilation network. Background Technology

[0002] In the field of building ventilation, especially in residential and office buildings where different functional zones need to be defined (such as directional airflow between clean spaces and contaminated areas), precisely controlling the ventilation volume of each room is a key technical issue. Currently, common airflow adjustment methods mainly rely on adjusting the opening of fresh air inlets or exhaust vents, or changing the fan speed. However, these methods have certain limitations: the adjustment of fresh air inlets and exhaust vents is often constrained by the building structure, and the adjustment response is not direct enough; fan speed regulation is energy-intensive and has limited ability to finely control the local airflow distribution.

[0003] Furthermore, as the primary connecting component between rooms, the opening and closing of doors has a decisive impact on airflow paths. When a typical door is closed, airflow can only exchange limitedly through the door gap, resulting in small and uncontrollable airflow. Conversely, fully opening the door causes airflow short-circuiting, disrupting the pre-set pressure gradient and directional flow field. While existing technologies include fixed louvers or adjustable grilles on the door panel, these openings are often arbitrarily placed, failing to adequately consider the impact of thermal pressure caused by temperature differences on airflow stability. Temperature differences between the inside and outside of a room can cause opposing pressures on the upper and lower parts of the door, potentially leading to reversed or fluctuating airflow and disrupting the stable operation of the ventilation network. Therefore, there is an urgent need in this field for an impedance regulation device that can be integrated into the door body, effectively regulating ventilation volume while resisting thermal pressure interference. Summary of the Invention

[0004] In view of this, the present invention proposes a door impedance regulator with reasonable structure, precise adjustment and effective avoidance of indoor and outdoor temperature difference interference, and a door equipped with the regulator, so as to solve the problem of difficult precise and stable adjustment of room air volume in ventilation network.

[0005] To achieve the above objectives, the present invention proposes an impedance-adjustable door structure for airflow distribution in an indoor ventilation network, comprising a door panel body, wherein a through hole is formed on the door panel body, and the through hole is located in the middle part of the height direction of the door panel body;

[0006] An impedance regulator is fixedly installed inside the through hole and is used to adjust the airflow resistance through the door.

[0007] A drive unit is used to drive the impedance regulator to change the airflow channel area.

[0008] Furthermore, the through hole is located at half the height of the door panel body.

[0009] Furthermore, the through hole is a rectangular through hole.

[0010] Furthermore, the impedance regulator includes:

[0011] A fixed frame is fixedly installed inside the through hole;

[0012] At least one adjusting blade is rotatably disposed within the fixed frame, and the opening area of ​​the airflow channel is changed by rotation.

[0013] Furthermore, there are multiple adjusting blades, and the multiple adjusting blades are arranged in parallel.

[0014] Furthermore, it also includes a linkage mechanism for coordinating the multiple adjusting blades.

[0015] Furthermore, the drive unit includes a motor, the output shaft of which is connected to an adjusting blade or a linkage mechanism.

[0016] Furthermore, it also includes a control unit, which is signal-connected to the drive unit and used to control the operation of the drive unit.

[0017] Furthermore, the control unit is configured to receive signals from the ventilation control system or the indoor air quality sensor, and automatically control the drive unit based on the signals.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The impedance regulator of this invention is positioned to minimize interference from indoor and outdoor temperature fluctuations on the pressure difference measurement and airflow regulation on both sides of the regulator, ensuring the stability of the regulation signal and the accuracy of the regulation action. It solves the problem of airflow instability caused by thermal pressure. Furthermore, placing the impedance regulator near the neutral plane effectively eliminates the risk of reverse flow when air passes through the regulator, ensuring the reliability of directional airflow in the ventilation network.

[0020] The door structure proposed in this invention directly utilizes the door itself as part of the ventilation channel, eliminating the need for additional ductwork. Its compact structure makes it easy to implement in new or renovated buildings. Through automatic control, intelligent adjustment based on feedback from indoor air quality sensors can be achieved, enhancing the user experience.

[0021] The door structure described in this invention, as an adjustable impedance element in the ventilation network, can more flexibly and precisely optimize the airflow distribution and pressure gradient distribution of the entire network through coordinated control with fresh air inlets, exhaust fans, etc. This reduces excessive reliance on the opening area of ​​fresh air inlets and the air pressure of exhaust fans, providing a key hardware foundation for building an efficient, stable, and adaptive intelligent ventilation system. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. In the drawings:

[0023] Figure 1 This is a front view of the impedance regulating door structure for airflow distribution in an indoor ventilation network proposed in this invention.

[0024] Figure 2 For along Figure 1 A cross-sectional view of the AA line shows the installation structure of the impedance regulator in the door panel;

[0025] Figure 3 This is a schematic diagram illustrating the application of the impedance regulating door of the present invention in a ventilation network;

[0026] Among them: 1-door panel body, 2-impedance regulator, 3-drive unit, 21-fixed frame, 22-adjusting blade. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] This embodiment proposes an impedance-adjustable door structure for airflow distribution in an indoor ventilation network, including a door panel body 1, with a through hole in the middle of the height direction of the door panel body 1, and an impedance adjuster 2 is provided at the through hole.

[0029] The impedance regulator 2 includes a fixed frame 21 fixedly installed in the through hole, and an adjustment blade 22 rotatably disposed in the fixed frame 21 for adjusting the area of ​​the airflow channel.

[0030] In a preferred embodiment, the through hole and impedance regulator 2 are located at half the height of the door panel body 1;

[0031] In a preferred embodiment, there are multiple adjusting blades 22 arranged in parallel and linked together by a linkage mechanism;

[0032] It also includes a drive unit 3 for driving the adjustment blade 22 to rotate.

[0033] The drive unit 3 is signal-connected to a control unit, which is configured to receive external commands and control the operation of the drive unit 3 to achieve automatic adjustment of airflow resistance.

[0034] See Figure 1 and Figure 2 In this embodiment, the door panel body 1 adopts a standard interior wooden door or metal door. A rectangular through-hole with dimensions of approximately 300mm × 150mm is opened at half the height of the door panel body 1 (i.e., the middle). The impedance regulator 2 is embedded in the through-hole via its fixing frame 21. The fixing frame 21 can be made of aluminum alloy profile. Multiple aluminum alloy adjusting blades 22, each approximately 30mm wide, are arranged parallel to each other within the fixing frame 21. These adjusting blades 22 are rotatably mounted on both sides of the frame via pivots, and the pivots of all blades are linked together via a linkage mechanism (not shown in the figure). The drive and control unit 3 includes a miniature stepper motor and a control circuit board. The stepper motor is fixed to the fixing frame 21, and its output shaft is connected to the linkage mechanism to drive all adjusting blades 22 to rotate synchronously. The control circuit board integrates a microprocessor and a communication module (such as a Wi-Fi or Zigbee module, which can receive wireless signals from a central ventilation control system or an indoor air quality sensor).

[0035] Working process: When the system needs to adjust the ventilation volume of the room, the control unit 3 receives the command and drives the stepper motor to rotate the adjusting blades 22. Figure 2 As shown, when blade 22 is in a horizontal position, the opening area is at its maximum and the airflow resistance is at its minimum; when blade 22 is rotated to a near-vertical position, the opening area is at its minimum and the airflow resistance is at its maximum. By controlling the blade's rotation angle, stepless adjustment of the airflow resistance can be achieved. (See also...) Figure 3 The door is installed between the clean space and the transition space. Since the regulator is located in the middle of the door, it is basically unaffected by the thermal pressure difference generated by the indoor and outdoor temperature difference (ΔT) at the top (Ptop) and bottom (Pbottom) of the door. This ensures that the pressure difference (ΔPmid) on both sides of the regulator mainly reflects the pressure gradient required by the ventilation system, thereby achieving stable and precise airflow control.

[0036] It is understood that the door structure proposed in this embodiment can achieve the following effects:

[0037] 1. Eliminate thermal pressure interference for precise adjustment: Due to the temperature difference between inside and outside the room, a thermal pressure gradient is formed along the height of the door. The pressure difference is greatest at the top and bottom of the door and in opposite directions, while the thermal pressure difference at the middle of the door height (the neutral plane) is theoretically zero. Setting the impedance regulator in this position can minimize interference caused by fluctuations in indoor and outdoor temperature differences on the pressure difference measurement and airflow adjustment on both sides of the regulator, ensuring the stability of the adjustment signal and the accuracy of the adjustment action. This solves the problem of unstable airflow caused by thermal pressure.

[0038] 2. Preventing airflow reversal and ensuring flow directionality: Under thermal pressure, the pressure directions of the upper and lower parts of the door are opposite. If the regulator is not located in the center, when the temperature difference changes drastically, pressure may be generated at the regulator opening in the opposite direction to the expected direction, causing airflow reversal. However, placing it near the neutral plane can effectively eliminate the risk of reverse flow when air passes through the regulator, ensuring the reliability of directional airflow in the ventilation network.

[0039] 3. Optimize Ventilation Network Performance: The door described in this invention, as an adjustable impedance element in the ventilation network, can more flexibly and precisely optimize the airflow distribution and pressure gradient distribution of the entire network through coordinated control with fresh air inlets, exhaust fans, etc. This reduces excessive reliance on the opening area of ​​fresh air inlets and the air pressure of exhaust fans, providing a key hardware foundation for building an efficient, stable, and adaptive intelligent ventilation system.

[0040] 4. High structural integration and strong practicality: This impedance-regulating door directly utilizes the door itself as part of the ventilation channel, eliminating the need for additional ductwork. Its compact structure makes it easy to implement in new or renovated buildings. Through automatic control, it can achieve intelligent adjustment based on feedback from indoor air quality sensors, enhancing the user experience.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. An impedance adjustment door structure for airflow distribution in a room ventilation network, characterized by The door panel body (1) is provided with a through hole, and the through hole is located at the middle of the door panel body (1) in the height direction; The impedance regulator (2) is fixedly installed in the through hole and is used for adjusting the air flow impedance through the door body; The driving unit (3) is used for driving the impedance regulator (2) to act to change the air flow passage area.

2. The impedance adjusting door structure according to claim 1, wherein The through hole is arranged at the half of the height of the door panel body (1).

3. The impedance adjusting door structure according to claim 1, wherein The through hole is a rectangular through hole.

4. The impedance adjusting door structure according to claim 1, wherein The impedance regulator (2) comprises: A fixed frame (21) is fixedly installed in the through hole; At least one adjusting blade (22) is rotatably arranged in the fixed frame (21) and changes the opening area of the air flow passage by rotation.

5. The impedance adjusting door structure according to claim 4, wherein The adjusting blade (22) is a plurality of adjusting blades (22), and the plurality of adjusting blades (22) are arranged in parallel.

6. The impedance adjusting door structure according to claim 5, wherein A connecting rod mechanism is further arranged to link the plurality of adjusting blades (22).

7. The impedance adjusting door structure according to claim 1, wherein The driving unit (3) comprises a motor, and an output shaft of the motor is connected with the adjusting blade (22) or the connecting rod mechanism.

8. The impedance adjusting door structure according to claim 1, wherein A control unit is further arranged, the control unit is signal-connected with the driving unit (3), and the control unit is used for controlling the action of the driving unit (3).

9. The impedance adjusting door structure according to claim 8, wherein The control unit is configured to receive a signal from a ventilation control system or an indoor air quality sensor and automatically control the driving unit (3) according to the signal.

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