CN202328615U

CN202328615U - Variable-air-volume (VAV) ventilation control system

Info

Publication number: CN202328615U
Application number: CN201120432852XU
Authority: CN
Inventors: 郭金成; 陈重
Original assignee: CHONGQING HAIRUN ENERGY-SAVING TECHNOLOGY Co Ltd
Current assignee: CHONGQING HAIRUN ENERGY-SAVING TECHNOLOGY Co Ltd
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-11
Anticipated expiration: 2021-11-04

Abstract

The utility model discloses a variable-air-volume (VAV) ventilation control system. The VAV ventilation control system comprises a main inlet fan and a main exhaust fan, wherein the main inlet fan is used for supplying air to N rooms through an air inlet pipeline; and the main exhaust fan is used for exhausting air for the N rooms through an air exhaust pipeline. The VAV ventilation control system is characterized in that an inlet fan, an exhaust fan and an air quality sensor are mounted in each room; air quality parameters detected by the air quality sensor are transmitted to a controller in each room; the controller is used for controlling operation of the inlet fan and the exhaust fan; and the controllers of the N rooms are connected with a logic operation module through an RS485 bus to control operation of the main inlet fan and the main exhaust fan through the logic operation module. The VEV ventilation control system has the following remarkable effects: the controller controls the ventilation amount in a room according to the air quality in the room, wind force balance at the near ends and the far ends in the air inlet pipeline and the air exhaust pipeline can be kept, and the ventilation amount balance among the main inlet fan and the plurality of inlet fans as well as among the main exhaust fan and the plurality of exhaust fans can be ensured, thereby saving energy and reducing emission.

Description

A kind of variable air rate ventilated control system

Technical field

The utility model relates to the Ventilation Control technology, specifically, is a kind of variable air rate ventilated control system.

Background technology

For the Ventilation Control of present large-scale ventilating system, traditional have only main air blower, do not have terminal power, so just causes main air blower proximal pressure air quantity big easily, and the remote pressure air quantity is little, even calm, can not rationally supply according to demand.

And the ventilation end of most of ventilating systems all is to adopt hand switch to change the rotating speed that the blower fan gear is controlled blower fan; Between each air intake machine and the main air intake machine and separate work between each exhaust blower and the main exhaust fan; Harmony is relatively poor; Its shortcoming is: air intake and air draft are difficult to reach balance, and the energy saving of system effect is relatively poor.

The utility model content

The purpose of the utility model is to propose a kind of variable air rate ventilated control system; Can better guarantee wind power balance; Be that far-end near-end airflow pressure is consistent, can coordinate control to main air blower and each small-sized fan by the demand supply simultaneously; Make between winner's air intake machine and a plurality of little air intake machine and the ventilation between main exhaust fan and a plurality of little exhaust blower reaches balance, realize the effect of energy-saving and emission-reduction.

For achieving the above object, the scheme that the utility model adopted is following:

A kind of variable air rate ventilated control system; Comprise main air intake machine and main exhaust fan, said main air intake machine is N room air-supply through intake stack, and said main exhaust fan is said N room air draft through exhaust duct; Wherein N is the integer greater than 1; Its key is: the air outlet in each room is equipped with the air intake machine, and the exhaust outlet in each room is equipped with exhaust blower, and the air quality sensor also is installed in each room; The air quality parameters that said air quality sensor detects is sent in the controller in each room; Air intake machine and exhaust blower running in this each room of controller control, the controller in N room is connected with logical operation module through the RS485 bus, controls said main air intake machine and main exhaust fan running through said logical operation module.

Controller is judged the required ventilation in each room according to the air quality that the air quality sensor detects each room, thereby controls the rotating speed of each room air intake machine and exhaust blower, and just holding for the terminal perhaps air draft of each room air intake provides enough wind-force.Simultaneously, the controller in each room uploads to the duty of air intake machine and exhaust blower in the logical operation module, and logical operation module is according to the required total air intake air quantity of the revolution speed calculating of each air intake machine on the intake stack, thereby controls the rotating speed of main air intake machine; In like manner, the air draft air quantity that logical operation module is total according to the revolution speed calculating of each exhaust blower on the exhaust duct, thus control the rotating speed of total exhaust blower, finally realize air intake balance and air draft balance.

Leak out in order to prevent room rate; Reduce indoor energy dissipation; Also be connected with air intake air-valve and air draft air-valve on the controller in each room, said air intake air-valve is installed between said air intake machine and the intake stack, and said air draft air-valve is installed between said exhaust blower and the exhaust duct.

The parameter that controller is checked according to the air quality sensor judges whether needs ventilate in the room, thus the on off state of control air intake air-valve and air draft air-valve, in control procedure; Ventilate if desired, at first open air-valve, increase ventilation if desired; With the ascending progressively increase of air intake machine rotating speed; Reduce the ventilation in room if desired, then control, in the time need not ventilating, close air-valve according to rightabout.

The remarkable result of the utility model is: can detect in real time IAQ; Controller is controlled the ventilation volume in room according to the quality of IAQ; In air supply duct and discharge tube, can also keep the proximal-distal wind power balance; And can guarantee the balance of the ventilation of primary air fan and a plurality of air intake machine and main exhaust fan and a plurality of exhaust blowers, finally reach the effect of energy-saving and emission-reduction.

Description of drawings

Fig. 1 is the mounting structure sketch map of the utility model;

Fig. 2 is the control circuit theory diagram of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.

Like Fig. 1, shown in Figure 2, a kind of variable air rate ventilated control system; Comprise main air intake machine 2 and main exhaust fan 3, said main air intake machine 2 is N room air-supply through intake stack a, and said main exhaust fan 3 is said N room air draft through exhaust duct b; Wherein N is the integer greater than 1; Air outlet in each room is equipped with air intake machine 5, and the exhaust outlet in each room is equipped with exhaust blower 6, and air quality sensor 9 also is installed in each room; The air quality parameters that said air quality sensor 9 detects is sent in the controller 4 in each room; Air intake machine 5 and exhaust blower 6 runnings in these controller each rooms of control 4, the controller 4 in N room is connected with logical operation module 1 through the RS485 bus, through said main air intake machine 2 of said logical operation module 1 control and main exhaust fan 3 runnings.

Also be connected with air intake air-valve 7 and air draft air-valve 8 on the controller 4 in each room, said air intake air-valve 7 is installed between said air intake machine 5 and the intake stack a, and said air draft air-valve 8 is installed between said exhaust blower 6 and the exhaust duct b.

Accompanying drawing has been enumerated the Ventilation Control situation in 5 rooms, i.e. N=5 as schematic description.For controller 4 and logical operation module 1, can select single-chip microcomputer, arm processor or FPGA controller for use, the type selecting of process chip can be according to the scale decision of concrete applied environment and control; For example, in the application of large-scale floor, because the room that relates to is many; Therefore the quantity of the controller 4 that logical operation module 1 is connected is more, when selecting then process chip, considers that as far as possible memory capacity is big, the many chips of control pin; In same room, intake is roughly consistent with exhaust air rate, therefore; Air intake machine 5 can be connected on the same control pin with exhaust blower 6, and air intake air-valve 7 also is connected on the same control pin with air draft air-valve 8.In implementation process; Each blower fan all adopts dc brushless motor; DC voltage between the controller 4 output 0-10V is controlled the rotating speed of blower fan, and each air-valve also adopts the numerical control electric air-valve, and controller 4 output corresponding digital control signals can be controlled the on off state of air-valve.

The operation principle of the utility model is: the air quality that controller 4 detects each room according to air quality sensor 9 is judged the required ventilation in each room; Thereby control the rotating speed of each room air intake machine 5 and exhaust blower 6 and the on off state of air intake air-valve 7 and air draft air-valve 8; Simultaneously; The controller 4 in each room uploads to the duty of air intake machine 5 and exhaust blower 6 in the logical operation module 1; Logical operation module 1 goes up the required total air intake air quantity of revolution speed calculating of each air intake machine 5 according to intake stack a, thereby controls the rotating speed of main air intake machine 2; In like manner, logical operation module 1 goes up the total air draft air quantity of revolution speed calculating of each exhaust blower 6 according to exhaust duct b, thereby controls the rotating speed of total exhaust blower 3, finally realizes air intake balance and air draft balance, reaches the effect of energy-saving and emission-reduction.

Claims

1. variable air rate ventilated control system; Comprise main air intake machine (2) and main exhaust fan (3); Said main air intake machine (2) is N room air-supply through intake stack (a); Said main exhaust fan (3) is said N room air draft through exhaust duct (b), and wherein N is the integer greater than 1, it is characterized in that: the air outlet in each room is equipped with air intake machine (5); Exhaust outlet in each room is equipped with exhaust blower (6); Air quality sensor (9) also is installed in each room, and the air quality parameters that said air quality sensor (9) detects is sent in the controller (4) in each room, and this controller (4) is controlled air intake machine (5) and exhaust blower (6) running in each room; The controller in N room (4) is connected with logical operation module (1) through the RS485 bus, through said logical operation module (1) control said main air intake machine (2) and main exhaust fan (3) running.

2. a kind of variable air rate ventilated control system according to claim 1; It is characterized in that: also be connected with air intake air-valve (7) and air draft air-valve (8) on the controller in each room (4); Said air intake air-valve (7) is installed between said air intake machine (5) and the intake stack (a), and said air draft air-valve (8) is installed between said exhaust blower (6) and the exhaust duct (b).