Room differential pressure controller

Abstract

The utility model relates to a room pressure difference controller, including variable air volume controller, analog actuator and variable air volume regulating valve, integrated with first pressure difference sensor and second pressure difference sensor on variable air volume controller, first pressure difference sensor and second pressure difference sensor are connected with the processor electric signal of variable air volume controller respectively, first pressure difference sensor is connected with the air pipe of room wall setting, and first pressure difference sensor is used for detecting the air pressure change in room, second pressure difference sensor is connected with pitot tube on variable air volume regulating valve, and second pressure difference sensor is used for detecting the flow of variable air volume regulating valve, and the signal output end of variable air volume controller is connected with the signal input end electric signal of analog actuator, and analog actuator is connected with variable air volume regulating valve through mechanical transmission spare. The room pressure difference controller of the utility model, the assembly degree of integration is high, and the required assembly quantity is few, can simplify its installation, and can improve the stability of equipment communication.

Description

Technical Field

[0001] This utility model relates to the field of laboratory pressure equipment technology, and in particular to a room differential pressure controller. Background Technology

[0002] Room pressure control is a key aspect of room environmental control. For example, in some laboratories, air pressure needs to be controlled to meet experimental conditions. Existing room pressure control solutions typically use ventilation systems. These systems require differential pressure sensors to detect the air pressure within the laboratory, and then variable air volume (VAV) controllers to adjust fan speed or the opening of VAV regulating valves to regulate the ventilation volume and thus control the laboratory air pressure. The drawbacks of existing laboratory air pressure control systems are the large number of components required, their dispersed layout, low equipment integration, and cumbersome installation. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing laboratory air pressure control systems, such as the large number of parts, scattered parts layout, low equipment integration, and cumbersome equipment installation, and to provide a room differential pressure controller.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A room differential pressure controller includes a variable air volume (VAV) controller, an analog actuator, and a VAV regulating valve. The VAV controller integrates a first differential pressure sensor and a second differential pressure sensor, which are electrically connected to the processor of the VAV controller. The first differential pressure sensor is connected to an air pipe installed on the room wall and is used to detect changes in room air pressure. The second differential pressure sensor is connected to a Pitot tube on the VAV regulating valve and is used to detect the airflow of the VAV regulating valve. The signal output terminal of the VAV controller is electrically connected to the signal input terminal of the analog actuator. The analog actuator is connected to the VAV regulating valve through a mechanical transmission component and is used to drive the opening angle of the VAV regulating valve.

[0006] In the above scheme, the analog actuator is an analog actuator with adjustable output voltage. The output voltage of the analog actuator can be designed as needed; for example, it can be designed as an analog actuator with an output voltage adjustable within the range of 0-10V.

[0007] In the above scheme, the analog actuator is an analog actuator with adjustable output current. The output current of the analog actuator can be designed as needed; for example, it can be designed as an analog actuator with an adjustable output current in the range of 4-20mA.

[0008] It should be noted that although a variable air volume controller is used in this utility model, and corresponding software support is required when the variable air volume controller is running, this software only involves simple control software such as sensor data acquisition, difference calculation, and control signal transmission. This control software belongs to the prior art, so this utility model does not involve the improvement of software or methods.

[0009] This invention has the following advantages: The room differential pressure controller of this invention integrates both the first differential pressure sensor and the second differential pressure sensor into the variable air volume controller. The device has a high degree of integration, requires fewer components, has a simplified structure, simplifies the installation of the device, and ensures the communication stability of the device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the room differential pressure controller of this utility model.

[0011] The attached diagram is labeled as follows: Variable air volume controller 1, first differential pressure sensor 11, processor 12, second differential pressure sensor 13, analog actuator 2, variable air volume regulating valve 3, room 4, air pipe 5, Pitot tube 6. Detailed Implementation

[0012] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] like Figure 1 As shown, the room differential pressure controller of this utility model includes a variable air volume controller 1, an analog actuator 2, and a variable air volume regulating valve 3.

[0014] The variable air volume controller 1 includes a processor 12, a first differential pressure sensor 11 and a second differential pressure sensor 13, and the first differential pressure sensor 11 and the second differential pressure sensor 13 are respectively electrically connected to the processor 12 of the variable air volume controller 1.

[0015] An air pipe 5 is installed on the wall of room 4. One end of the air pipe 5 is open to communicate with the space inside the room, and the other end of the air pipe 5 is connected to the first differential pressure sensor 11. The first differential pressure sensor 11 can detect the air pressure value inside the room.

[0016] The variable air volume regulating valve 3 is used to deliver air from the air supply duct to the room 4.

[0017] A Pitot tube 6 is provided on the variable air volume regulating valve 3. One end of the Pitot tube 6 is connected to the variable air volume regulating valve 3, and the other end of the Pitot tube 6 is connected to the second differential pressure sensor 13. The air volume delivered by the variable air volume regulating valve 3 is detected by the second differential pressure sensor 13.

[0018] Analog actuator 2 is an analog actuator with adjustable output voltage or output current. Analog actuator 2 adjusts the state of variable air volume regulating valve 3 by changing the output voltage. For example, the opening angle of variable air volume regulating valve 3 can be adjusted by adjusting the output voltage of analog actuator 2. The output voltage can be adjusted within the range of 0-10V. Alternatively, it can be an analog actuator with adjustable output current, which can be adjusted within the range of 4-20mA. The opening angle of variable air volume regulating valve 3 can be adjusted by adjusting the output current of analog actuator 2.

[0019] The analog actuator is connected to the variable air volume regulating valve through a mechanical transmission component, which can be a mechanical transmission component that adjusts the rotation angle by voltage or current.

[0020] The processor 12 is used to collect data detected by the first differential pressure sensor 11 and the second differential pressure sensor 13. The first differential pressure sensor 11 is used to detect the air pressure value in the room 4, and the second differential pressure sensor 13 is used to detect the air volume on the variable air volume regulating valve 3. The processor 12 compares the air pressure value detected by the first differential pressure sensor 11 with the set air pressure value, and then calculates the air volume that the variable air volume regulating valve 3 needs to deliver to the room 4. The processor 12 monitors the air volume delivered to the room 4 through the second differential pressure sensor 13 and determines the current air volume delivered to the room 4.

[0021] The room differential pressure controller of this utility model can be used not only in laboratories, but also in other scenarios that require air pressure control, such as clean rooms. Such applications should also fall within the protection scope of this utility model.

[0022] The room differential pressure controller of this invention has a high degree of component integration, requires fewer components, simplifies its installation, and improves the stability of device communication.

[0023] 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 room differential pressure controller, characterized in that, The system includes a variable air volume (VAV) controller, an analog actuator, and a VAV regulating valve. The VAV controller integrates a first differential pressure sensor and a second differential pressure sensor, which are electrically connected to the VAV controller's processor. The first differential pressure sensor is connected to an air duct installed on the room wall and is used to detect changes in room air pressure. The second differential pressure sensor is connected to a Pitot tube on the VAV regulating valve and is used to detect the airflow of the VAV regulating valve. The signal output terminal of the VAV controller is electrically connected to the signal input terminal of the analog actuator. The analog actuator is connected to the VAV regulating valve through a mechanical transmission component and is used to drive the opening angle of the VAV regulating valve.

2. The room differential pressure controller according to claim 1, characterized in that: The analog actuator is an analog actuator with adjustable output voltage.

3. The room differential pressure controller according to claim 1, characterized in that: The analog actuator is an analog actuator with adjustable output current.

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