Large module heating ventilation air conditioner unpowered air duct constant air volume adjusting device

Abstract

The utility model discloses a constant air volume adjusting device for an unpowered air duct of a large module heating ventilation air conditioner. The constant air volume adjusting device comprises an air purifying device, an air volume adjusting structure and an unpowered fan which are connected to a ventilation main pipeline. The air volume of the heating ventilation air conditioner can be adjusted through the air volume adjusting structure, then air is purified through the air purification device, and in order to guarantee that the air volume of some rooms fluctuates in the stable state in the rooms, the device can rapidly respond and automatically adjust so as to maintain the relative stability of the air volume of other rooms; the overall air volume unbalance of the system caused by local changes is effectively avoided, and the adjusting precision and the operation stability of the air conditioning system are remarkably improved. The device can meet the overall comfort requirement of the room air volume in real time, and ensures the stable state in the room.

Description

Technical Field

[0001] The utility model relates to a heating, ventilation and air conditioning construction structure for ocean engineering, in particular to a constant air volume regulating device for a large module heating, ventilation and air conditioning non-powered air duct. Background Art

[0002] In the construction of the air conditioning system for a living building project, due to a large number of rooms on each floor and different air volume requirements for each room, simply relying on the air volume regulating valves configured in the branch air ducts for static distribution of the air volume is difficult to accurately achieve the expected effect, making the air volume balance process in the system debugging stage long and inefficient. And when the air conditioning system enters a stable operation state and the main unit maintains a constant air supply volume, once the air volume in an individual room fluctuates due to changes in the external environment, it will quickly spread to the entire system, resulting in a rapid imbalance of the air volume in other rooms and affecting the overall comfort. Moreover, in some windy weather, using the air conditioning system not only cannot meet the air volume requirements of the rooms in the building, but also increases the waste of electric power resources and cannot meet the comfort requirements in the current living building module. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a constant air volume regulating device for a large module heating, ventilation and air conditioning non-powered air duct, which can significantly improve the regulation accuracy and operation stability of the air conditioning system and save electric power resources.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A constant air volume regulating device for a large module heating, ventilation and air conditioning non-powered air duct of the utility model includes an air purification device connected to the air outlet end of the ventilation main duct. A wind speed sensor is fixed on the ventilation main duct behind the air outlet end of the air purification device. An air volume regulating structure is installed at the inlet of the ventilation main duct. The air volume regulating structure includes a second fixed support frame installed on the ventilation main duct. A plurality of servo motors are installed on the outer wall of the second fixed support frame. The output shaft of each servo motor is connected to the central axis of a fan blade installed in the second fixed support frame. The inlet of the ventilation main duct is respectively communicated with the inlets of two ventilation branch ducts. A first electromagnetic ventilation check valve is connected to the first ventilation branch duct. A second electromagnetic ventilation check valve is connected to the second ventilation branch duct. A heating, ventilation and air conditioning compressor is installed at the inlet of the first ventilation branch duct. An outdoor non-powered fan is installed at the inlet of the second ventilation branch duct. The outdoor non-powered fan is installed on the top of the living building. The wind speed sensor, the servo motor, the first electromagnetic ventilation check valve and the second electromagnetic ventilation check valve are connected to a computer through data lines.

[0006] Using this device can meet the overall comfort requirements of the room air volume in real time, ensure the stable state inside the room. Once the air volume in some rooms inside the living building fluctuates, the device can respond quickly and automatically adjust to maintain the relative stability of the air volume in other rooms, effectively avoiding the overall imbalance of the system air volume caused by local changes, and significantly improving the regulation accuracy and operation stability of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 FIG. is a schematic structural diagram of a large-module HVAC duct non-powered constant air volume regulating device of the present utility model;

[0008] Figure 2 is Figure 1 a schematic structural diagram of the air purification device in the device shown;

[0009] Figure 3 is Figure 1 a left sectional view of the air volume regulating structure in the device shown;

[0010] Figure 4 is Figure 1 a main sectional view of the air volume regulating structure in the device shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0012] As shown in the drawings, a large-module HVAC duct non-powered constant air volume regulating device of the present utility model includes an air purification device 1 connected to the air outlet end of the ventilation main duct 2. The air purification device 1 includes a first fixed support frame 1-1 fixed on the ventilation main duct 2. Along the gas flow direction in the ventilation main duct, a layer of activated carbon dehumidification layer 1-3 and two layers of air purification layers 1-2 are sequentially and spacedly installed in the fixed support frame 1-1. A wind speed sensor 1-4 is fixed on the ventilation main duct 2 at the rear of the air outlet end of the two layers of air purification layers 1-2.

[0013] An air volume regulating structure 3 is installed at the inlet of the ventilation main duct. The air volume regulating structure 3 includes a second fixed support frame 3-3 installed on the ventilation main duct 2. A plurality of (such as three, four, etc.) servo motors 3-1 are installed on the outer wall of the second fixed support frame 3-3. The output shaft of each servo motor 3-1 is connected to the central axis of a fan blade 3-2 installed in the second fixed support frame.

[0014] The inlet of the main ventilation duct is respectively connected to the inlets of two ventilation branch ducts. A first electromagnetic ventilation check valve 6-1 is connected to the first ventilation branch duct 2-1, and a second electromagnetic ventilation check valve 6-2 is connected to the second ventilation branch duct 2-2. A HVAC compressor 4 is installed at the inlet of the first ventilation branch duct, and an outdoor power-free fan 5 is installed at the inlet of the second ventilation branch duct. The outdoor power-free fan 5 is installed on the top of the living building.

[0015] The wind speed sensor 1-4, the servo motor 3-1, the first electromagnetic ventilation check valve 6-1 and the second electromagnetic ventilation check valve 6-2 are connected to the computer through data lines.

[0016] The working principle of this system is as follows:

[0017] When the weather is hot and the large-module HVAC is in use, the computer controls the first electromagnetic ventilation check valve 6-1 to open and the second electromagnetic ventilation check valve 6-2 to close. The HVAC compressor 4 supplies air to the module. When the air volume fluctuates in individual rooms due to external environmental changes (such as opening of doors and windows, increase in personnel flow, etc.), when the wind speed sensor in the module detects that wind speed compensation is required, the computer controls the servo motor 3-1 of the air volume adjustment structure 3 to respectively adjust the opening size of the fan blades 3-2. The air passes through the main ventilation duct 2 and enters the air purification device 1. The activated carbon dehumidification layer 1-3 of the air purification device 1 dehumidifies the air, and the two air purification layers 1-2 filter impurities in the air. After passing through the wind speed sensor 1-4, the wind speed sensor 1-4 feeds back the detected data to the computer. If the wind speed meets the requirements, the opening size of the fan blades 3-2 is maintained. If not, the computer continues to control the servo motor 3-1 to respectively adjust the opening size of the fan blades 3-2 until the wind speed requirements of individual rooms are met, so as to achieve a rapid response to weak changes in the transient external environment and maintain the stability of the system air volume.

[0018] When the weather is cool or windy and the doors and windows need to be closed, in order to maintain the wind speed in the living building module, the HVAC compressor 4 is turned off. The computer controls the first electromagnetic ventilation check valve 6-1 to close and the second electromagnetic ventilation check valve 6-2 to open. The computer controls the servo motor 3-1 of the air volume adjustment structure 3 to respectively adjust the opening size of the fan blades 3-2. The wind speed sensor 1-4 detects the wind speed. The outdoor power-free fan 5 rotates to drive the air flow in the living building to meet the wind speed requirements of the rooms.

Claims

1. A large-module HVAC non-powered air duct constant air volume regulating device, characterized in that: An air purification device (1) is connected to the air outlet end of the main ventilation duct (2). A wind speed sensor (1-4) is fixed on the main ventilation duct (2) behind the air outlet end of the air purification device. An air volume adjustment structure (3) is installed at the inlet of the main ventilation duct. The air volume adjustment structure (3) includes a second fixed support frame installed on the main ventilation duct (2). A plurality of servo motors (3-1) are installed on the outer wall of the second fixed support frame (3-3). The output shaft of each servo motor is connected to the central axis of a fan blade (3-2) installed inside the second fixed support frame. The inlet of the main ventilation duct is respectively communicated with the inlets of two ventilation branch pipes. A first electromagnetic ventilation check valve (6-1) is connected to the first ventilation branch pipe (2-1), and a second electromagnetic ventilation check valve (6-2) is connected to the second ventilation branch pipe (2-2). A heating, ventilation, and air conditioning compressor (4) is installed at the inlet of the first ventilation branch pipe, and an outdoor power-free fan (5) is installed at the inlet of the second ventilation branch pipe. The outdoor power-free fan (5) is installed on the top of the living building. The wind speed sensor, servo motors, first electromagnetic ventilation check valve, and second electromagnetic ventilation check valve are connected to a computer through data lines.

2. The constant air volume regulating device for the large-module HVAC non-powered air duct according to claim 1, wherein: The air purification device includes a first fixed support frame (1-1) fixed on the main ventilation duct. Along the gas flow direction in the main ventilation duct, an activated carbon dehumidification layer (1-3) and two air purification layers (1-2) are sequentially and spacedly installed inside the first fixed support frame (1-1). The wind speed sensor (1-4) is located on the main ventilation duct behind the air outlet end of the two air purification layers.

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