CN114279054B - Front chamber pressurization air supply system for health building and control method thereof - Google Patents
Front chamber pressurization air supply system for health building and control method thereof Download PDFInfo
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- CN114279054B CN114279054B CN202111622298.6A CN202111622298A CN114279054B CN 114279054 B CN114279054 B CN 114279054B CN 202111622298 A CN202111622298 A CN 202111622298A CN 114279054 B CN114279054 B CN 114279054B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a control method of a front room pressurizing and air supplying system for a healthy building, which comprises the steps of starting a pressurizing system, dynamically regulating and controlling a front room residual pressure value and closing the pressurizing system; when the pressurizing system is opened, the opening degree of the electric multi-blade regulating valve is smaller as the distance from the pressurizing blower is shorter; the front chamber residual pressure value dynamic regulation and control is that the controller sequences each layer of front chamber residual pressure values, compares the values with a preset residual pressure standard range, regulates and controls the opening degree of the electric multi-blade regulating valve of each layer according to a sequencing result and a comparison result, and controls the opening and closing of the residual pressure bypass valve, so that the residual pressure values of each layer are kept in an allowable maximum difference range, and fire accidents are avoided during pressure relief.
Description
Technical Field
The invention relates to the technical field of building air supply, in particular to a front chamber pressurization air supply system for a healthy building and a control method thereof.
Background
According to the national standard requirement of the existing smoke prevention and exhaust system of the building, a normally closed pressurizing air supply outlet is required to be arranged in a front chamber provided with a mechanical pressurizing air supply system. When a fire disaster occurs in the building, the normally closed pressurizing air supply outlet of the ignition layer and the adjacent upper and lower front chambers is opened. The mechanical pressurizing air delivery amount is required to meet the requirement that the pressure difference between the front chamber and the air passage is 25-30 Pa. When the residual pressure value of the system exceeds the maximum allowable pressure difference, pressure relief measures are taken. The common pressure relief measure is that a residual pressure bypass valve is arranged on a main pipe section of a fan outlet, and a pressure difference detector is linked with the residual pressure bypass valve to control the opening and closing of a bypass pipe, so that overpressure of a front chamber is avoided.
The excess pressure bypass valve solves the problem of overpressure by reducing the air supply volume of the pressurization fan, and the excess pressure bypass valve is opened as long as the excess pressure value of one front chamber exceeds the maximum allowable pressure difference. When the overpressure of a certain front chamber causes the pressure of the system to be relieved, the original front chamber with proper residual pressure has insufficient pressure. Therefore, the residual pressure values of different front chambers under different working conditions must be ensured to be not greatly different. However, the influence factors influencing the pressurizing air supply quantity of each front chamber are many, such as the opening frequency of the evacuation door, the air leakage quantity of the door gap, the system resistance and the like. The existing mechanical pressurization air supply system adopts a method of uniform air volume distribution to design a normally closed pressurization air supply outlet, and the normally closed pressurization air supply outlet of each front chamber is of the same area type. Because the branch pipe wind pressure resistance of each layer of air supply outlet is different, the air quantity of the normally closed pressurizing air supply outlet close to the air supply end is larger than that of the normally closed pressurizing air supply outlet far away from the air supply end, the air supply quantity is unbalanced, the residual pressure value of each floor antechamber is larger, the fire-fighting accident is easily caused when the pressure relief is carried out when a fire disaster happens, and the evacuation of personnel is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the front chamber pressurizing and air supplying system for the healthy building and the control method thereof, which can dynamically adjust the residual pressure value of each layer of front chamber, so that the residual pressure value is kept in an allowable difference range, and fire accidents are avoided when pressure relief is carried out.
The invention provides a control method of a front chamber pressurization air supply system for a healthy building, which comprises the following steps:
s1, starting a pressurizing system: when the fire-fighting system sends a fire signal to the controller, the controller sends a signal to the pressurizing blower and the electric multi-blade regulating valves on the air supply branch pipes on the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer; the pressurizing blower and the electric multi-blade regulating valve are opened, and the opening degree of the electric multi-blade regulating valve is smaller as the distance from the pressurizing blower is shorter; the pressurizing air feeder performs pressurizing air feeding on the front chambers of the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer;
s2, dynamically regulating and controlling the front chamber residual pressure value: the residual pressure values of the upper front chambers of the ignition layer, the lower front chambers of the ignition layer and the upper front chambers of the ignition layer are increased, the pressure difference detectors of the layers monitor respective residual pressure values a, b and c in real time and transmit the values to the controller, the controller sequences the received residual pressure values a, b and c and compares the values with a preset residual pressure standard range [ M-M ], the opening degree of the electric multi-blade regulating valve of each layer is regulated and controlled according to the sequencing result and the comparison result, and the residual pressure bypass valve is controlled to be opened and closed, so that the residual pressure values of the layers are kept in an allowable maximum difference range D;
s3, closing a pressurizing system: when the fire fighting system sends a stop signal to the controller, the controller sends a signal to the pressurizing blower and each layer of electric multi-blade regulating valve; the pressurizing blower and the electric multi-vane regulating valve are closed.
Further, the specific regulation and control method of the residual pressure value comprises the following steps:
when a = b = c and is located in the [ M-M ] interval, the controller controls the opening degree of the electric multi-blade regulating valve of each layer to be unchanged; when a = b = c > M, the controller sends a signal to the residual pressure bypass valve, the residual pressure bypass valve is opened to release pressure, and the residual pressure value of each front chamber is reduced until the residual pressure value falls into [ M-M ];
when a, b and c are not completely equal and are all located in the [ M-M ] interval, the controller calculates the maximum difference dmax of a, b and c, and compares dmax with the preset maximum allowable difference D, and when dmax is less than or equal to D, the opening degree of the electric multi-blade regulating valve of each layer is kept unchanged; when dmax is larger than D, controlling the opening degree of the electric multi-blade regulating valve of the floor with the maximum residual pressure value to be reduced, and controlling the opening degree of the electric multi-blade regulating valve of the floor with the minimum residual pressure value to be increased;
when a, b and c are not completely equal and at least one exceeds M, the controller controls the residual pressure bypass valve to be opened, controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value exceeds M to be reduced, and controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value does not exceed M to be increased.
The invention also provides a front chamber pressurization air supply system for the healthy building, which is suitable for the control method to regulate and control and comprises a pressurization air supply blower, an electric multi-blade regulating valve, a pressure difference detector, a residual pressure bypass valve and a controller connected with a fire-fighting system; the main air pipe of the pressurizing air feeder is communicated with the antechambers of all floors through the air supply branch pipes of all floors respectively; each layer of air supply branch pipe is provided with an electric multi-blade regulating valve, and each layer of front chamber is provided with a differential pressure detector; the main air pipe is connected in parallel with a bypass pipe, and a residual pressure bypass valve is installed on the bypass pipe; the pressurizing air feeder, the electric multi-blade regulating valve, the differential pressure detector and the residual pressure bypass valve are all connected with the controller.
The invention has the following beneficial effects:
this application passes through the antechamber excess pressure value of pressure differential detector real-time detection each layer, and the controller sequences the excess pressure value to compare with preset excess pressure standard range, regulate and control the aperture of the electronic multi-leaf governing valve of each layer according to sequencing result and comparison result, and the switching of control excess pressure bypass valve. This application can the dynamic adjustment each layer antechamber's residual pressure value for the residual pressure value keeps in allowing the difference within range, produces the fire incident when avoiding carrying out the pressure release. Widely applied to common buildings and healthy buildings such as hospitals.
Drawings
Fig. 1 is a schematic view of the entire structure of embodiment 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A control method of a front chamber pressurization air supply system for a healthy building comprises the following steps:
s1, starting a pressurizing system: when the fire-fighting system sends a fire signal to the controller, the controller sends a signal to the pressurizing blower and the electric multi-blade regulating valves on the air supply branch pipes on the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer; the pressurizing blower and the electric multi-blade regulating valve are opened, and the opening degree of the electric multi-blade regulating valve is smaller as the distance from the pressurizing blower is shorter; the pressurizing air feeder performs pressurizing air feeding on the front chambers of the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer;
s2, dynamically regulating and controlling the front chamber residual pressure value: the residual pressure values of the front chambers at the upper layer of the ignition layer, the lower layer of the ignition layer and the lower layer of the ignition layer are increased, the pressure difference detectors at each layer monitor respective residual pressure values a, b and c in real time and transmit the values to the controller, the controller sequences the received residual pressure values a, b and c, compares the values with a preset residual pressure standard range [ M-M ], regulates and controls the opening of the electric multi-leaf regulating valve at each layer according to the sequencing result and the comparison result, and controls the opening and closing of the residual pressure bypass valve to keep the residual pressure values at each layer within an allowable maximum difference range D;
s3, closing a pressurizing system: when the fire fighting system sends a stop signal to the controller, the controller sends a signal to the pressurizing blower and each layer of electric multi-blade regulating valve; the pressurizing blower and the electric multi-blade regulating valve are closed;
the specific regulation and control method of the residual pressure value comprises the following steps:
when a = b = c and is located in the [ M-M ] interval, the controller controls the opening degree of the electric multi-blade regulating valve of each layer to be unchanged; when a = b = c > M, the controller sends a signal to the residual pressure bypass valve, the residual pressure bypass valve is opened to release pressure, and the residual pressure value of each front chamber is reduced until the residual pressure value falls into [ M-M ];
when a, b and c are not completely equal and are all located in the [ M-M ] interval, the controller calculates the maximum difference dmax of a, b and c, and compares dmax with the preset maximum allowable difference D, and when dmax is less than or equal to D, the opening degree of the electric multi-blade regulating valve of each layer is kept unchanged; when dmax is larger than D, controlling the opening degree of the electric multi-blade regulating valve of the floor with the maximum residual pressure value to be reduced, and controlling the opening degree of the electric multi-blade regulating valve of the floor with the minimum residual pressure value to be increased;
when a, b and c are not completely equal and at least one exceeds M, the controller controls the residual pressure bypass valve to be opened, controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value exceeds M to be reduced, and controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value does not exceed M to be increased.
Example 2
As shown in figure 1, the front chamber pressurized air supply system for the health building is suitable for regulation and control of the control method and comprises a pressurized air supply blower, an electric multi-blade regulating valve, a pressure difference detector, a residual pressure bypass valve and a controller connected with a fire-fighting system; the main air pipe of the pressurizing air feeder is communicated with the antechambers of all floors through the air supply branch pipes of all floors respectively; each layer of air supply branch pipe is provided with an electric multi-blade regulating valve, and each layer of front chamber is provided with a differential pressure detector; the main air pipe is connected in parallel with a bypass pipe, and a residual pressure bypass valve is installed on the bypass pipe; the pressurizing air feeder, the electric multi-blade regulating valve, the differential pressure detector and the residual pressure bypass valve are all connected with the controller.
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.
Claims (2)
1. A control method of a front chamber pressurization air supply system for a health building is characterized in that: the method comprises the following steps:
s1, starting a pressurizing system: when the fire-fighting system sends a fire signal to the controller, the controller sends a signal to the pressurizing blower and the electric multi-blade regulating valves on the air supply branch pipes on the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer; the pressurizing blower and the electric multi-blade regulating valve are opened, and the opening degree of the electric multi-blade regulating valve is smaller as the distance from the pressurizing blower is shorter; the pressurizing air feeder performs pressurizing air feeding on the front chambers of the upper layer of the ignition layer, the ignition layer and the lower layer of the ignition layer;
s2, dynamically regulating and controlling the front chamber residual pressure value: the residual pressure values of the upper front chambers of the ignition layer, the lower front chambers of the ignition layer and the upper front chambers of the ignition layer are increased, the pressure difference detectors of the layers monitor respective residual pressure values a, b and c in real time and transmit the values to the controller, the controller sequences the received residual pressure values a, b and c and compares the values with a preset residual pressure standard range [ M-M ], the opening degree of the electric multi-blade regulating valve of each layer is regulated and controlled according to the sequencing result and the comparison result, and the residual pressure bypass valve is controlled to be opened and closed, so that the residual pressure values of the layers are kept in an allowable maximum difference range D;
s3, closing a pressurizing system: when the fire fighting system sends a stop signal to the controller, the controller sends a signal to the pressurizing blower and each layer of electric multi-blade regulating valve; the pressurizing blower and the electric multi-blade regulating valve are closed;
the specific regulation and control method of the residual pressure value comprises the following steps:
when a = b = c and is located in the [ M-M ] interval, the controller controls the opening degree of the electric multi-vane regulating valve of each layer to be unchanged; when a = b = c > M, the controller sends a signal to the residual pressure bypass valve, the residual pressure bypass valve is opened to release pressure, and the residual pressure value of each front chamber is reduced until the residual pressure value falls into [ M-M ];
when a, b and c are not completely equal and are all located in the [ M-M ] interval, the controller calculates the maximum difference dmax of a, b and c, and compares dmax with the preset maximum allowable difference D, and when dmax is less than or equal to D, the opening degree of the electric multi-blade regulating valve of each layer is kept unchanged; when dmax is larger than D, controlling the opening degree of the electric multi-leaf regulating valve of the floor with the maximum residual pressure value to be reduced, and controlling the opening degree of the electric multi-leaf regulating valve of the floor with the minimum residual pressure value to be increased;
when a, b and c are not completely equal and at least one exceeds M, the controller controls the residual pressure bypass valve to be opened, controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value exceeds M to be reduced, and controls the opening degree of the electric multi-blade regulating valve at the floor where the residual pressure value does not exceed M to be increased.
2. An antechamber pressurization air supply system for a health building, which is suitable for regulation and control by the control method of the antechamber pressurization air supply system for the health building, according to claim 1, and is characterized in that: comprises a pressurizing blower, an electric multi-blade regulating valve, a differential pressure detector, a residual pressure bypass valve and a controller connected with a fire-fighting system; the main air pipe of the pressurizing air feeder is communicated with the front chambers of all floors through the air supply branch pipes of all layers respectively; each layer of air supply branch pipe is provided with an electric multi-blade regulating valve, and each layer of front chamber is provided with a differential pressure detector; the main air pipe is connected in parallel with a bypass pipe, and a residual pressure bypass valve is installed on the bypass pipe; the pressurizing air feeder, the electric multi-blade regulating valve, the differential pressure detector and the residual pressure bypass valve are all connected with the controller.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208124551U (en) * | 2018-04-25 | 2018-11-20 | 青岛渥汇人工环境有限公司 | A kind of smoke proof staircase or vestibule pressurization overbottom pressure value control device |
| JP2020010949A (en) * | 2018-07-20 | 2020-01-23 | 株式会社竹中工務店 | Pressurized smoke exhaust system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440389A (en) * | 2019-08-15 | 2019-11-12 | 重庆众夏科技有限公司 | A kind of fire-fighting emergent evacuation overbottom pressure monitoring method and system |
| CN211146842U (en) * | 2019-12-05 | 2020-07-31 | 中信建筑设计研究总院有限公司 | Tail end-adjustable front chamber pressurization air supply system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208124551U (en) * | 2018-04-25 | 2018-11-20 | 青岛渥汇人工环境有限公司 | A kind of smoke proof staircase or vestibule pressurization overbottom pressure value control device |
| JP2020010949A (en) * | 2018-07-20 | 2020-01-23 | 株式会社竹中工務店 | Pressurized smoke exhaust system |
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