Indoor constant voltage variable air volume ventilation control device

Abstract

The utility model discloses a kind of variable air volume ventilation control devices of indoor pressure stabilization, including ventilation pipeline, air volume regulating mechanism, air pressure balancing mechanism and control module, ventilation pipeline contains air inlet and air outlet pipeline, inside is equipped with ventilation impeller and driving element;Air volume regulating mechanism realizes air volume control by electric air valve, air velocity sensor;Air pressure balancing mechanism maintains indoor air pressure stability using pressure sensor, air supplement pipeline, exhaust pipeline and electric valve;Control module integrates microprocessor, display screen and operating button, forms closed-loop intelligent control, device uses flame-retardant corrosion-resistant material, air supplement pipeline is equipped with silencer.The innovation is in air volume and air pressure collaborative control, can accurately regulate ventilation volume and maintain indoor air pressure stability, with fast response, high control precision, energy saving and noise reduction and other advantages, suitable for various indoor ventilation scenes.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically to an indoor pressure-stabilizing variable air volume ventilation control device. Background Technology

[0002] In modern buildings, indoor ventilation systems are crucial for maintaining good air quality and a comfortable indoor environment. Variable air volume (VAV) ventilation systems can flexibly adjust the ventilation volume according to indoor needs, offering numerous advantages such as energy saving, and are therefore widely used.

[0003] However, existing variable air volume (VAV) ventilation systems are prone to indoor air pressure fluctuations during airflow adjustment, leading to unstable ventilation effects and even affecting the comfort and health of occupants. For example, when the airflow suddenly increases or decreases, the indoor air pressure changes accordingly, potentially causing problems such as door and window vibrations and ineffective fresh air intake. Existing VAV ventilation control devices also lack precision and stability in airflow adjustment. The lack of accurate airflow detection and control methods makes it difficult to achieve precise VAV control based on actual indoor needs, resulting in unstable ventilation effects that fail to meet users' requirements for indoor air quality and comfort. Furthermore, unstable airflow adjustment also affects the energy efficiency and lifespan of the ventilation system. For instance, in some office spaces, inaccurate airflow adjustment in ventilation systems either leads to energy waste or fails to effectively improve the indoor air environment.

[0004] Therefore, it is necessary to design an indoor pressure-stabilizing variable air volume ventilation control device to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide an indoor pressure-stabilizing variable air volume ventilation control device, which effectively solves the problems of large indoor air pressure fluctuations, poor air volume adjustment accuracy and stability, high operating noise, and insufficient pipeline safety and durability in existing variable air volume ventilation systems, thereby improving the comfort and reliability of the indoor ventilation environment and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An indoor pressure-stabilizing variable air volume ventilation control device includes a ventilation duct, an air volume regulating mechanism, an air pressure balancing mechanism, and a control module installed on an indoor wall. The ventilation duct includes an air inlet duct and an air outlet duct, which are respectively connected to the indoor space. A ventilation impeller and a driving element are installed inside the ventilation duct. The air volume regulating mechanism is installed inside the ventilation duct and is used to regulate the air volume within the ventilation duct. The air pressure balancing mechanism is connected to the air volume regulating mechanism and is used to maintain stable indoor air pressure. The control module is electrically connected to both the air volume regulating mechanism and the air pressure balancing mechanism and is used to control the operation of the air volume regulating mechanism and the air pressure balancing mechanism. A mounting bracket is fixedly installed at the bottom of the ventilation duct.

[0008] Furthermore, the air volume regulating mechanism includes an electric air valve, a wind speed sensor, and a connecting pipe. The electric air valve is installed inside the connecting pipe, and the wind speed sensor is installed inside the ventilation duct.

[0009] The above technical solution allows for the adjustment of airflow within the ventilation duct by controlling the opening degree of the electric air valve. A wind speed sensor is installed inside the ventilation duct to detect the wind speed in real time and transmits the detection signal to the control module. The control module then precisely adjusts the opening degree of the electric air valve based on the preset wind speed value, thereby achieving precise variable airflow control.

[0010] Furthermore, the electric air valve includes two air valve blades located inside the connecting pipe and a drive rod located between the two air valve blades. The drive rod is welded and fixed to the two air valve blades by a connector. An air valve drive element located on the connecting pipe is also connected to one axial side of the drive rod.

[0011] Through the above technical solution, the air valve driving element drives the driving rod to rotate, thereby opening and closing the air valve blades and realizing flexible adjustment of air volume.

[0012] Furthermore, the air pressure balancing mechanism includes a wind pressure sensor, an air supply pipe, an exhaust pipe, an air supply electric valve, and an exhaust electric valve. The wind pressure sensor is installed on the ventilation duct at a location in the indoor space. One end of the air supply pipe is connected to the outside and the other end is connected to the indoor space. One end of the exhaust pipe is connected to the indoor space and the other end is connected to the outside.

[0013] With the above technical solution, when the control module receives the indoor air pressure detected by the wind pressure sensor as being lower than the preset lower limit, it controls the air supply electric valve to open, and outdoor air enters the room through the air supply pipe to increase the indoor air pressure; when the indoor air pressure is higher than the preset upper limit, it controls the exhaust electric valve to open, and discharges the excess indoor air to the outside through the exhaust pipe to reduce the indoor air pressure, thereby maintaining the stability of the indoor air pressure.

[0014] Furthermore, a noise reduction device is installed on the gas supply pipe. The noise reduction device consists of a noise reduction material wrapped around the outer wall of the gas supply pipe. The noise reduction material is glass fiber cotton, and then an outer protective layer is wrapped around it. The protective layer is a metal mesh.

[0015] The above technical solutions effectively reduce the noise generated during the gas replenishment process, creating a quiet indoor environment.

[0016] Furthermore, the control module includes a microprocessor, a display screen, and operation buttons. The microprocessor is electrically connected to the wind speed sensor, wind pressure sensor, electric air valve, and air supply electric valve, respectively. The display screen is used to display indoor air pressure and wind speed information in the ventilation duct. The operation buttons are used to set preset wind speed values ​​and upper and lower air pressure limits.

[0017] Through the above technical solution, the microprocessor is responsible for receiving the detection signals from each sensor and controlling the operation of each component. The display screen is used to display information such as indoor air pressure and wind speed in the ventilation duct in real time, so that users can intuitively understand the operating status of the device. The operation buttons are used to set preset parameters such as wind speed value and upper and lower limits of air pressure to meet the personalized needs of users.

[0018] Furthermore, the ventilation ducts, the pipes on the air volume regulating mechanism, and the pipes on the air pressure balancing mechanism are all made of flame-retardant and corrosion-resistant materials, such as stainless steel, glass fiber reinforced plastic, or chlorinated polyvinyl chloride.

[0019] The above technical solutions improve the safety and service life of the device, making it suitable for various complex environments.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention utilizes a variable air volume (VAV) ventilation control device for indoor pressure stabilization, achieving the following effects: 1. By monitoring indoor air pressure in real time through a wind pressure sensor, and coordinating with the air supply pipe, exhaust pipe, and corresponding electric valves, it can quickly respond to changes in indoor air pressure, automatically adjusting air supply or exhaust, effectively avoiding indoor air pressure fluctuations caused by airflow adjustments, and solving problems such as door and window vibration and poor fresh air intake, providing a stable and comfortable air pressure environment for indoor occupants; 2. The wind speed sensor and electric air valve work together to detect and precisely adjust the airflow according to preset values ​​in real time. Compared with existing technologies, this achieves more precise VAV control, meeting the ventilation needs of different indoor environments and improving ventilation efficiency. While improving ventilation efficiency, it reduces energy consumption and enhances the energy efficiency and stability of the ventilation system; 3. The silencer on the air supply pipe is designed with a layer of glass fiber cotton and metal mesh protection, which can effectively absorb and block noise during the air supply process, reduce the interference of the device operation on the indoor environment, and is suitable for noise-sensitive places such as hospitals, schools, and libraries; 4. The ventilation duct, air volume regulation mechanism duct, and air pressure balance mechanism duct are made of flame-retardant and corrosion-resistant materials, such as 316L stainless steel and glass fiber reinforced plastic, which enhances the fire resistance and corrosion resistance of the device, reduces the risk of fire, extends the service life of the device in various complex environments, and reduces maintenance costs and replacement frequency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the ventilation duct of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the air volume regulating mechanism and the air pressure balancing mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the main structure of the ventilation duct and air volume regulating mechanism of this utility model;

[0026] Figure 5 This is a side view of the structure of this utility model;

[0027] Figure 6 This is a block diagram showing the connection between the control module and each sensor of this utility model.

[0028] In the diagram: 1. Ventilation duct; 2. Air volume adjustment mechanism; 3. Air pressure balancing mechanism; 4. Mounting bracket; 5. Control module; 11. Ventilation impeller; 12. Drive element; 21. Electric air valve; 22. Wind speed sensor; 23. Connecting pipe; 211. Air valve blade; 212. Drive rod; 213. Connector; 214. Air valve drive element; 31. Wind pressure sensor; 32. Air supply pipe; 33. Air supply electric valve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0031] Example 1

[0032] Please see Figure 1-6 This embodiment provides an indoor pressure-stabilized variable air volume ventilation control device, which mainly consists of a ventilation duct 1, an air volume adjustment mechanism 2, an air pressure balancing mechanism 3, a mounting bracket 4, and a control module 5.

[0033] Reference Appendix Figure 2 The ventilation duct 1 includes an air inlet duct and an air outlet duct, which are connected to the indoor space. Inside, there is a ventilation impeller 11 and a drive element 12. The drive element 12 drives the ventilation impeller 11 to rotate, enabling air circulation within the ventilation duct 1 and thus completing indoor ventilation. The bottom of the ventilation duct 1 is fixedly installed by a mounting bracket 4 to ensure the overall stability of the device.

[0034] Reference Appendix Figure 3The air volume regulating mechanism 2 is installed inside the ventilation duct 1 and is used to regulate the air volume inside the ventilation duct 1. Specifically, it includes an electric air valve 21, a wind speed sensor 22, and a connecting pipe 23. The electric air valve 21 is installed inside the connecting pipe 23. The electric air valve 21 consists of two air valve blades 211 located inside the connecting pipe 23, a drive rod 212 located between the two air valve blades 211, a connector 213, and an air valve drive element 214. The drive rod 212 is welded and fixed to the two damper blades 211 via the connector 213. The damper drive element 214 is connected to one axial side of the drive rod 212 and can drive the drive rod 212 to rotate, thereby driving the damper blades 211 to open and close, thus regulating the air volume. The wind speed sensor 22 is installed in the ventilation duct 1. It is a W10 wind speed sensor that can monitor the wind speed in the ventilation duct 1 in real time. It adopts the RS485 communication protocol and is connected to the microprocessor in the control module 5 through two shielded twisted pair cables. The wind speed sensor 22 encodes the collected wind speed data into digital signals and sends them to the microprocessor through the two cables in a differential transmission manner. After receiving the signal, the microprocessor decodes and processes the data to obtain accurate wind speed information, which is used as the basis for adjusting the opening of the electric damper and controlling the ventilation volume.

[0035] Reference Appendix Figure 1 , Figure 3 , Figure 4 as well as Figure 6 The air pressure balancing mechanism 3 is connected to the air volume regulating mechanism 2 to maintain stable indoor air pressure. It includes an air pressure sensor 31, an air supply pipe 32, an exhaust pipe, an air supply electric valve 33, and an exhaust electric valve. The air pressure sensor 31, model DRS-37, is installed on the ventilation duct 1 in the indoor space and uses the RS485 communication protocol. It is connected to the microprocessor via two dedicated signal transmission lines. The air pressure sensor 31 converts the detected analog air pressure signal into a digital signal and sends it to the microprocessor via the transmission lines. The microprocessor analyzes and processes the air pressure data. When the indoor air pressure is abnormal, it promptly controls the air supply electric valve 33. One end of the air supply pipe 32 is connected to the outside, and the other end is connected to the indoor space. One end of the exhaust pipe is connected to the indoor space, and the other end is connected to the outside. When the indoor air pressure is lower than the preset lower limit, the control module 5 controls the air supply electric valve 33 to open, supplying air to the room through the air supply pipe 32. When the indoor air pressure is higher than the preset upper limit, the control module 5 controls the exhaust electric valve to open, expelling excess air from the room to the outside through the exhaust pipe. Meanwhile, a noise reduction device is installed on the gas supply pipe 32. This device reduces noise during the gas supply process by wrapping glass fiber cotton around the outer wall of the gas supply pipe 32 as a noise reduction material and then wrapping it with a metal mesh protective layer.

[0036] refer to Figure 6The control module 5 is installed on the indoor wall and includes a microprocessor, a display screen, and operation buttons. The microprocessor is electrically connected to the wind speed sensor 22, wind pressure sensor 31, electric air valve 21, and air supply electric valve 33, respectively. It receives data transmitted from the wind speed sensor 22 and wind pressure sensor 31, and controls the operation of the electric air valve 21, air supply electric valve 33, and exhaust electric valve according to preset wind speed and air pressure limits. The display screen shows indoor air pressure and wind speed information within ventilation duct 1, allowing users to monitor the device's operating status in real time. The operation buttons are used by the user to set preset wind speed and air pressure limits. The control logic is as follows:

[0037] 1. When the indoor air pressure is lower than the set lower limit, the air supply electric valve 33 opens, and at the same time the opening degree of the electric air valve 21 is increased;

[0038] 2. When the indoor air pressure is higher than the set upper limit, the exhaust electric valve opens and the opening degree of the electric air valve 21 is reduced at the same time;

[0039] 3. By dynamically compensating for the damper adjustment amount through wind speed data, a closed-loop control system is formed.

[0040] Example 2

[0041] In this embodiment, based on embodiment 1, the pipes on the ventilation duct 1, the air volume regulating mechanism 2, and the air pressure balancing mechanism 3 are all made of stainless steel 316L. This material has good flame retardant and corrosion resistant properties, ensuring the safety and stability of the device during long-term use.

[0042] The working process of this utility model is as follows: When using the indoor pressure-stabilized variable air volume ventilation control device, the drive element 12 drives the ventilation impeller 11 in the ventilation duct 1 to rotate, so that the air inlet duct and the air outlet duct are connected to the indoor and outdoor environments, so that the air circulates in the ventilation duct 1 and completes the basic ventilation.

[0043] The wind speed sensor 22 monitors the wind speed in the ventilation duct 1 in real time and transmits the data to the control module 5. If the air volume needs to be adjusted, the microprocessor of the control module 5 sends a command to the damper drive element 214 according to the preset wind speed value. The drive rod 212 drives the damper blade 211 in the connecting pipe 23 to rotate, changing the damper opening and precisely adjusting the air volume in the ventilation duct 1.

[0044] The wind pressure sensor 31 monitors the indoor air pressure in real time, and the data is synchronously transmitted to the control module 5. When the indoor air pressure is lower than the preset lower limit, the control module 5 controls the air supply electric valve 33 on the air supply pipe 32 to open and introduce outdoor air; when it is higher than the preset upper limit, it controls the exhaust electric valve to open and expel excess indoor air to maintain stable air pressure. At the same time, the silencer on the air supply pipe 32 is composed of fiberglass wool and metal mesh, which can reduce the noise of air supply.

[0045] The display screen of control module 5 shows information such as indoor air pressure and wind speed in ventilation duct 1 in real time. Users can set preset wind speed values ​​and upper and lower limits of air pressure through operation buttons. Based on the data from wind speed sensor 22 and wind pressure sensor 31, the microprocessor uses control algorithms to adjust the working status of electric air valve 21, air supply electric valve 33 and exhaust electric valve in real time, forming a closed-loop intelligent control system.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable air volume ventilation control device for indoor voltage stabilization, characterized in that: The system includes a ventilation duct (1), an air volume regulating mechanism (2), an air pressure balancing mechanism (3), and a control module (5) installed on the indoor wall. The ventilation duct (1) includes an air inlet duct and an air outlet duct, which are respectively connected to the indoor space. The ventilation duct (1) is equipped with a ventilation impeller (11) and a drive element (12). The air volume regulating mechanism (2) is installed in the ventilation duct (1) to regulate the air volume in the ventilation duct (1). The air pressure balancing mechanism (3) is connected to the air volume regulating mechanism (2) to maintain stable indoor air pressure. The control module is electrically connected to the air volume regulating mechanism (2) and the air pressure balancing mechanism (3) to control the operation of the air volume regulating mechanism (2) and the air pressure balancing mechanism (3). A mounting bracket (4) is fixedly installed at the bottom of the ventilation duct (1).

2. The indoor voltage-stabilized variable air volume ventilation control device according to claim 1, characterized in that: The air volume regulating mechanism (2) includes an electric air valve (21), a wind speed sensor (22), and a connecting pipe (23). The electric air valve (21) is installed in the connecting pipe (23), and the wind speed sensor (22) is installed in the ventilation duct (1).

3. The indoor voltage-stabilized variable air volume ventilation control device according to claim 2, characterized in that: The electric air valve (21) includes two air valve blades (211) located inside the connecting pipe (23) and a drive rod (212) located between the two air valve blades (211). The drive rod (212) is welded and fixed to the two air valve blades (211) by a connector (213). An air valve drive element (24) located on the connecting pipe (23) is also connected to one axial side of the drive rod (212).

4. The indoor voltage-stabilized variable air volume ventilation control device according to claim 1, characterized in that: The air pressure balancing mechanism (3) includes a wind pressure sensor (31), an air supply pipe (32), an exhaust pipe, an air supply electric valve (33), and an exhaust electric valve. The wind pressure sensor (31) is installed on the ventilation pipe (1) in the indoor space. One end of the air supply pipe (32) is connected to the outside and the other end is connected to the indoor space. One end of the exhaust pipe is connected to the indoor space and the other end is connected to the outside.

5. The indoor voltage-stabilized variable air volume ventilation control device according to claim 4, characterized in that: The gas supply pipe (32) is equipped with a noise reduction device. The noise reduction device consists of a noise reduction material wrapped around the outer wall of the gas supply pipe (32). The noise reduction material is glass fiber cotton, and then an outer protective layer is wrapped around it. The protective layer is a metal mesh.

6. The indoor voltage-stabilized variable air volume ventilation control device according to claim 1, characterized in that: The control module (5) includes a microprocessor, a display screen and operation buttons. The microprocessor is electrically connected to the wind speed sensor (22), the wind pressure sensor (31), the electric air valve (21), and the air supply electric valve (33). The display screen is used to display indoor air pressure and wind speed information in the ventilation duct (1). The operation buttons are used to set preset wind speed values ​​and upper and lower limits of air pressure.

7. The indoor voltage-stabilized variable air volume ventilation control device according to claim 1, characterized in that: The ventilation duct (1), the air volume regulating mechanism (2), and the air pressure balancing mechanism (3) are all made of flame-retardant and corrosion-resistant materials, such as stainless steel 316L, glass fiber reinforced plastic, or chlorinated polyvinyl chloride.

Images