阅读说明：本技术 一种带延时变风量送风系统 (Air supply system with time delay and variable air volume ) 是由 朱立萃 于 2020-04-30 设计创作，主要内容包括：本发明提供一种带延时变风量送风系统,包括：通风管(1)、文丘里风量测量仪(2)、转动电机(3)、阀门(4)、变风量MCU控制器(5)、压差传感器(6),其特征在于：所述文丘里风量测量仪(2)置于所述通风管(1)中,所述阀门(4)置于通风管(1)出风口处,所述转动电机(3)连接所述阀门(4),所述压差传感器(6)置于所述通风管(1)出风口外侧壁,所述变风量MCU控制器(5)与所述文丘里风量测量仪(2)、转动电机(3)、压差传感器(6)线性连接。采用带延时设定变风量装置后,排风减小可设定延时s动作,此时送风阀先行减小,在保持排风减小,在这过程中有效保证排放量大于送风量。保证房间负压状态不变,提高安全性。(The invention provides a time-delay variable air volume air supply system, comprising: ventilation pipe (1), venturi air volume measuring apparatu (2), rotating electrical machine (3), valve (4), variable air volume MCU controller (5), differential pressure sensor (6), its characterized in that: venturi air volume measuring apparatu (2) are arranged in ventilation pipe (1), ventilation pipe (1) air outlet department is arranged in valve (4), rotate motor (3) and connect valve (4), differential pressure sensor (6) are arranged in ventilation pipe (1) air outlet lateral wall, variable air volume MCU controller (5) with venturi air volume measuring apparatu (2), rotation motor (3), differential pressure sensor (6) linear connection. After the variable air volume device with the delay setting is adopted, the exhaust air is reduced, the delay s action can be set, at the moment, the air supply valve is firstly reduced, the exhaust air is kept to be reduced, and the discharge amount is effectively ensured to be larger than the air supply amount in the process. The negative pressure state of the room is ensured to be unchanged, and the safety is improved.)

1. A kind of tape delays the variable blast volume air supply system, including: ventilation pipe (1), venturi air volume measuring apparatu (2), rotating electrical machine (3), valve (4), variable air volume MCU controller (5), differential pressure sensor (6), its characterized in that: venturi air volume measuring apparatu (2) are arranged in ventilation pipe (1), ventilation pipe (1) air outlet department is arranged in valve (4), rotate motor (3) and connect valve (4), differential pressure sensor (6) are arranged in ventilation pipe (1) air outlet lateral wall, variable air volume MCU controller (5) with venturi air volume measuring apparatu (2), rotation motor (3), differential pressure sensor (6) linear connection.

2. The air supply system with the time delay and the variable air volume as claimed in claim 1, characterized in that: and the differential pressure sensor (6) converts the pressure value outside the air outlet into an electric signal and transmits the electric signal to the variable air volume MCU controller (5).

3. The air supply system with the time delay and the variable air volume as claimed in claim 2 is characterized in that: the venturi air volume measuring instrument (2) measures the air speed in the ventilation pipe (1) and transmits the numerical value of the air speed to the variable air volume MCU controller (5).

4. The air supply system with the time delay and the variable air volume according to claim 3, is characterized in that: and the variable air volume MCU controller (5) is provided with a coefficient K value according to the section numerical value and the wind resistance of the ventilation pipe (1), and confirms the air volume to be supplemented according to the fact that the dynamic pressure (dynamic pressure-static pressure) of the Venturi device in the air inlet of the differential pressure sensor (6) is converted into an electric signal, wherein the air volume is K wind speed.

5. The air supply system with the time delay and the variable air volume as claimed in claim 4, wherein: and after the air quantity required is calculated by the variable air quantity MCU controller (5), the rotating motor (3) is started to adjust the opening degree of the valve (4).

6. The air supply system with the time delay and the variable air volume as claimed in claim 5, wherein: the variable air volume MCU controller (5) is provided with a time delay s, and a real-time monitoring differential pressure sensor (6) obtains an electric signal converted by dynamic pressure of the Venturi air volume measuring instrument (2), so that the opening and closing degree of the valve (4) is adjusted in real time to control the air volume.

Technical Field

The invention relates to the technical field of building ventilation, in particular to an air supply system with a time delay variable air volume.

Background

The air supply of the conventional design adopts a variable air volume valve, the biosafety cabinet adopts an exhaust variable air volume valve, when the biosafety cabinet is opened, the exhaust air volume is increased, the room air supplement volume is increased, the exhaust air volume is larger than the air supplement volume, the room negative pressure state is kept, and viruses and the like are prevented from overflowing. When the biological safety cabinet is closed, the exhaust air is lowered, and the air supply is raised. At the moment, the process may have a state that the air supply is larger than the air exhaust, and the room has a short positive pressure and has a risk of leakage.

After the variable air volume device with the delay setting is adopted, the exhaust air is reduced, the delay s action can be set, at the moment, the air supply valve is firstly reduced, the exhaust air is kept to be reduced, and the discharge amount is effectively ensured to be larger than the air supply amount in the process. The negative pressure state of the room is ensured to be unchanged, and the safety is improved.

Disclosure of Invention

In order to solve the existing problems, the invention provides the following technical scheme:

a kind of tape delays the variable blast volume air supply system, including: ventilation pipe (1), venturi air volume measuring apparatu (2), rotating electrical machine (3), valve (4), variable air volume MCU controller (5), differential pressure sensor (6), its characterized in that: venturi air volume measuring apparatu (2) are arranged in ventilation pipe (1), ventilation pipe (1) air outlet department is arranged in valve (4), rotate motor (3) and connect valve (4), differential pressure sensor (6) are arranged in ventilation pipe (1) air outlet lateral wall, variable air volume MCU controller (5) with venturi air volume measuring apparatu (2), rotation motor (3), differential pressure sensor (6) linear connection.

Preferably, the pressure difference sensor (6) converts the pressure value outside the air outlet into an electric signal and transmits the electric signal to the variable air volume MCU controller (5).

Preferably, the venturi air volume measuring instrument (2) measures the air speed in the ventilation pipe (1) and transmits the numerical value to the variable air volume MCU controller (5).

Preferably, the variable air volume MCU controller (5) sets a coefficient K value according to the section numerical value and the wind resistance of the ventilation pipe (1), and determines the air volume to be supplemented according to the dynamic pressure (dynamic pressure-static pressure) of the venturi device in the air inlet of the differential pressure sensor (6) converted into an electric signal, wherein the air volume is K air speed.

Preferably, the variable air volume MCU controller (5) calculates the required air volume and then starts the rotating motor (3) to adjust the opening degree of the valve (4).

Preferably, the variable air volume MCU controller (5) is provided with a time delay s, and the real-time monitoring differential pressure sensor (6) obtains an electric signal of dynamic pressure conversion of the Venturi air volume measuring instrument (2), so that the opening and closing degree of the valve (4) is adjusted in real time to control the air volume.

Has the advantages that:

after the variable air volume device with the delay setting is adopted, the exhaust air is reduced, the delay s action can be set, at the moment, the air supply valve is firstly reduced, the exhaust air is kept to be reduced, and the discharge amount is effectively ensured to be larger than the air supply amount in the process. The negative pressure state of the room is ensured to be unchanged, and the safety is improved.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

1-ventilation pipe, 2-Venturi air volume measuring instrument, 3-rotating motor, 4-valve, 5-variable air volume MCU controller and 6-differential pressure sensor.

Detailed Description

The technical solution in the embodiment of the present invention will be described with reference to fig. 1 in the embodiment of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a kind of tape delays the variable blast volume air supply system, including: ventilation pipe (1), venturi air volume measuring apparatu (2), rotating electrical machine (3), valve (4), variable air volume MCU controller (5), differential pressure sensor (6), its characterized in that: venturi air volume measuring apparatu (2) are arranged in ventilation pipe (1), ventilation pipe (1) air outlet department is arranged in valve (4), rotate motor (3) and connect valve (4), differential pressure sensor (6) are arranged in ventilation pipe (1) air outlet lateral wall, variable air volume MCU controller (5) with venturi air volume measuring apparatu (2), rotation motor (3), differential pressure sensor (6) linear connection.

Preferably, the pressure difference sensor (6) converts the pressure value outside the air outlet into an electric signal and transmits the electric signal to the variable air volume MCU controller (5).

Preferably, the venturi air volume measuring instrument (2) measures the air speed in the ventilation pipe (1) and transmits the numerical value to the variable air volume MCU controller (5).

Preferably, the variable air volume MCU controller (5) sets a coefficient K value according to the section numerical value and the wind resistance of the ventilation pipe (1), and determines the air volume to be supplemented according to the dynamic pressure (dynamic pressure-static pressure) of the venturi device in the air inlet of the differential pressure sensor (6) converted into an electric signal, wherein the air volume is K air speed.

Preferably, the variable air volume MCU controller (5) calculates the required air volume and then starts the rotating motor (3) to adjust the opening degree of the valve (4).

Preferably, the variable air volume MCU controller (5) is provided with a time delay s, and the real-time monitoring differential pressure sensor (6) obtains an electric signal of dynamic pressure conversion of the Venturi air volume measuring instrument (2), so that the opening and closing degree of the valve (4) is adjusted in real time to control the air volume. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.