Air valve actuator and air volume control valve for heating, ventilation and air conditioning system

Abstract

The utility model discloses a kind of air valve actuators and air volume regulating valve for heating ventilation air conditioning system.The air valve actuator includes shell, motor, differential pressure sensor and control unit.Differential pressure sensor is used to obtain pressure signal;Control unit calculates air flow or flow rate according to signal.It is characterized in that, actuator further include the man-machine interaction unit being set to the surface of shell, and the unit is electrically connected with control unit, for in situ display flow, flow rate and valve opening degree and the like parameter;In addition, actuator can also integrate wireless communication module, for carrying out wireless data interaction with external terminal.The utility model solves the problem that existing debugging work relies on remote control system, field state is not transparent, and efficiency is low, realizes the in situ visualization of information and wireless convenient debugging, makes single person fast and accurate debugging possible, significantly shortens construction period, improves the efficiency and precision of debugging and maintenance work.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning technology, and in particular to a damper actuator and an air volume regulating valve with the actuator. Background Technology

[0002] In existing HVAC control systems, on-site commissioning is a crucial but extremely complex process. Although high-performance actuators already possess differential pressure sensors and airflow calculation capabilities, significant industry pain points still exist in actual engineering commissioning.

[0003] First, airflow regulating valves (such as variable air volume valves or constant air volume valves) are usually installed in confined spaces such as suspended ceilings, making them difficult for commissioning personnel to directly access or observe. Currently, commissioning work heavily relies on feedback from remote building automation systems. For projects without building automation systems, the main reliance is on terminal wind speed measurements and the experience of commissioning personnel.

[0004] Secondly, the HVAC system is a highly coupled pipe network, and adjusting any valve will cause drastic fluctuations in the airflow and pressure of other valves in the network. Commissioning personnel have to shuttle back and forth between the remote control center, the valve installation location, and the terminal air outlet, making it impossible to achieve "what you see is what you get" adjustments, let alone know the instantaneous operating status inside the valve.

[0005] Therefore, the existing debugging methods are inefficient and rely heavily on the personal experience of the debugging personnel, resulting in vague debugging results with huge errors from the design goals. This not only wastes system energy but also greatly increases the project's manpower and time costs. Summary of the Invention

[0006] The purpose of this utility model is to provide a damper actuator and air volume regulating valve with local display function, which aims to solve the problems of opaque damper operation status, unintuitive on-site debugging, and low efficiency in the background art.

[0007] To achieve the above objectives, this utility model provides a damper actuator, comprising: a housing; a motor for driving the valve; a control unit; and a differential pressure sensor electrically connected to the control unit; the control unit is configured to calculate air flow rate or velocity based on the signal from the differential pressure sensor and preset parameters; characterized in that the damper actuator further comprises: a human-machine interface unit disposed on the surface of the housing and electrically connected to the control unit; and the control unit is further configured to send operating parameters such as flow rate or velocity and valve opening degree to the human-machine interface unit for local display.

[0008] Preferably, the human-computer interaction unit includes a display device, which is mounted on the surface of the housing.

[0009] Preferably, the housing is also provided with at least one physical button, which is electrically connected to the control unit and is used to switch display content or set parameters.

[0010] Preferably, the control unit also integrates a wireless communication module, which is used for wireless data communication with an external terminal.

[0011] This utility model also provides an air volume regulating valve, characterized in that it includes: a valve body, in which a rotatable valve plate is disposed; and an air valve actuator as described above, the air valve actuator being mounted on the valve body and used to drive the valve plate to rotate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Local Information Visualization: By setting up a human-machine interaction unit on the actuator, commissioning personnel can read key parameters such as valve opening and instantaneous air volume locally and in real time, making the internal operating status of pipelines and valves clear at a glance.

[0014] 2. Improved debugging efficiency and accuracy: The debugging process is greatly simplified, making it possible for a single person to quickly and accurately debug, no longer relying on the central control or personal experience, significantly shortening the construction period and reducing labor costs.

[0015] 3. Facilitates operation and maintenance: During daily system operation, maintenance personnel can quickly check valve status and rapidly locate faults, improving the maintainability of the system. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the damper actuator of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of the air volume regulating valve of this utility model.

[0018] Figure 3 This is a block diagram of the control system principle of the damper actuator of this utility model.

[0019] In the diagram: 10-valve body; 12-pressure tapping device; 13-hose; 20-air valve actuator; 21-housing; 22-motor; 23-control unit; 24-differential pressure sensor; 24a-full pressure interface; 24b-static pressure interface; 25-human-machine interface unit; 26-output shaft sleeve; 27-wireless communication module; 9-valve shaft. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figures 1 to 3 This utility model provides an airflow regulating valve, which mainly includes an air valve actuator (20) and a valve body (10). The air valve actuator (20) is installed outside the valve body (10) and is connected to the valve shaft (9) passing through the valve body (10) through its output shaft sleeve (26), and is used to drive the valve shaft (9) and the valve plate fixed thereon to rotate, thereby regulating the airflow through the valve body (10).

[0022] like Figure 1 and Figure 3 As shown, the core of this utility model is a damper actuator (20) with local display function. The damper actuator (20) includes a housing (21) for protecting internal components, a motor (22) disposed inside the housing (21), and a control unit (23) as the core. In this embodiment, the control unit (23) can be a printed circuit board integrating a microcontroller (MCU).

[0023] The damper actuator (20) also has a built-in differential pressure sensor (24), which is connected to a pressure tapping device (12) located inside the valve body (10) via a hose (13) through a total pressure port (24a) and a static pressure port (24b) extending to the outside of the housing (21). The pressure tapping device (12) is used to collect the total pressure and static pressure upstream of the valve plate, and the differential pressure sensor (24) converts the collected pressure difference into an electrical signal and sends it to the control unit (23). The differential pressure sensor (24) can be an existing micro differential pressure sensor chip.

[0024] The key feature of this invention is that a human-computer interaction unit (25) is provided on an easily observable surface of the housing (21). In this embodiment, the human-computer interaction unit (25) includes at least a display device (e.g., an OLED or LCD display screen) for displaying information.

[0025] Reference Figure 3 The working process of this utility model is as follows:

[0026] The control unit (23) obtains the rotation position of the motor (22) in real time through the built-in position sensor (e.g., potentiometer or Hall sensor), thereby calculating the rotation angle of the valve shaft (9) and the current opening degree (e.g., percentage) of the valve.

[0027] Simultaneously, the control unit (23) receives a pressure signal from the differential pressure sensor (24). The memory of the control unit (23) pre-stores an algorithm model based on the valve characteristic curve, which establishes a mathematical relationship between valve opening, pressure difference, and air volume. The control unit (23) combines the current opening and the received pressure signal to calculate the instantaneous air volume value flowing through the valve body (10) in real time using the algorithm model.

[0028] Most importantly, the control unit (23) is configured to send its calculated current opening degree, real-time air volume and other possible operating status parameters (such as set air volume, working mode, etc.) to the human-machine interaction unit (25) and display them locally and clearly through its display device.

[0029] In a more preferred embodiment, the damper actuator (20) also integrates a wireless communication module (27). This module is part of the control unit (23) and is used for wireless data communication with an external terminal. The wireless communication module (27) is preferably a Wi-Fi or Bluetooth module, which enables commissioning and maintenance personnel to wirelessly acquire or set damper parameters at close range on-site via a dedicated mobile application (APP) or computer terminal without physical wiring. This greatly simplifies the commissioning process and is another important feature of this utility model that improves efficiency.

Claims

1. A damper actuator, comprising: The device comprises a housing (21), a motor (22) for driving the valve, a control unit (23), and a differential pressure sensor (24); the differential pressure sensor (24) is electrically connected to the control unit (23); the control unit (23) is configured to calculate the air flow rate or velocity based on the signal from the differential pressure sensor (24), characterized in that the valve actuator further comprises a human-machine interface unit (25), the human-machine interface unit (25) being disposed on the surface of the housing (21) and electrically connected to the control unit (23); and the control unit (23) is further configured to send the operating parameters such as the flow rate or velocity and the valve opening to the human-machine interface unit (25) for local display.

2. The damper actuator according to claim 1, characterized in that, The human-computer interaction unit (25) includes a display device, which is mounted on the surface of the housing (21).

3. The damper actuator according to claim 1 or 2, characterized in that, The housing (21) is also provided with at least one physical button, which is electrically connected to the control unit (23) and is used to switch the display content or set parameters.

4. The damper actuator according to claim 1, characterized in that, The control unit (23) also integrates a wireless communication module (27), which is used to perform wireless data communication with an external terminal.

5. The damper actuator according to claim 1, characterized in that, The housing (21) is provided with a full pressure port (24a) and a static pressure port (24b) extending to the outside. The full pressure port (24a) and the static pressure port (24b) are connected to the differential pressure sensor (24) through a hose (13).

6. An air volume regulating valve, characterized in that, include: The valve body (10) has a rotatable valve plate inside; And a damper actuator (20) as described in any one of claims 1 to 5, the damper actuator (20) being mounted on the valve body (10) and used to drive the valve plate to rotate.

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