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Room pressure control system and method

A technology of control system and control method, applied in the direction of heating and ventilation control system, heating and ventilation safety system, heating method, etc.

Active Publication Date: 2018-08-21
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the room pressure control system disclosed in Patent Document 2, in order to perform stable room pressure control or to moderate fluctuations in the measured value of the room pressure, and to correct the residual air volume based on the measured value of the room pressure after the fluctuation is moderated, Or limit the change speed of the air volume setting value
[0004] However, in the room pressure control systems disclosed in Patent Document 1 and Patent Document 2, there is a problem that a differential pressure sensor for measuring room pressure is required.

Method used

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no. 1 Embodiment

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a block diagram showing the configuration of the room pressure control system according to the first embodiment of the present invention. The room pressure control system of this embodiment has: a fume hood, which is arranged in the room 100; a local exhaust duct 102, which is connected to the fume hood 101; an air supply duct 103, which provides air supply to the room 100; Duct 104, which discharges the air in the room 100; local exhaust valve EXV, which adjusts the air volume of the local exhaust duct 102; air supply valve MAV, which adjusts the air volume of the air supply duct 103; general exhaust valve GEX , which adjusts the air volume of the general exhaust pipe 104; the controller 105, which controls the local exhaust valve EXV; the controller 106, which controls the air supply valve MAV; the controller 107, which controls the general exhaust valve ...

no. 2 Embodiment

[0052] In the first embodiment, the case where the supply air volume Vmav is changed due to the opening and closing of the local exhaust valve EXV accompanying the opening and closing of the regulating door 110 of the fume hood 101 has been exemplified, but the reason for the change of the supply air volume Vmav is still unknown. There are others, and for all of these reasons the invention is applicable. As another example of changing the air supply air volume Vmav, there is a possibility of reducing the air supply air volume Vmav while maintaining a constant pressure difference between indoor and outdoor in order to save energy during nights when no work is performed, holidays, and other time periods when there are no people present. and the air volume switching control of the exhaust air volume Vgex. This air volume change is performed every day on weekdays. In the example of switching from daytime to nighttime, both the supply air volume Vmav and exhaust air volume Vgex gr...

no. 3 Embodiment

[0063] Next, a third embodiment of the present invention will be described. In this embodiment, as another example of changing the supply air volume Vmav, a case where the supply air volume Vmav is changed by temperature control will be described. Figure 9 It is a block diagram showing the configuration of the room pressure control system according to this embodiment. In this embodiment, since the configuration of the controllers 105, 107, 108 is the same as that of the first embodiment, the figure 2 , Figure 4 , Figure 5 symbols are explained.

[0064] Figure 10 It is a block diagram showing a configuration example of the controller 106 of this embodiment. The controller 106 of this embodiment includes: a supply air volume control unit 1060 ; and an air volume calculation unit 1061 , which calculates the supply air volume Vmav according to the load condition of the room 100 .

[0065] Figure 11 It is a flowchart explaining the temperature control operation of thi...

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Abstract

The invention provides a room pressure control system. Even in the case no differential pressure sensor for measuring room pressure is provided, the room pressure control system can keep the room pressure constant. The room pressure control system includes an air supply valve (MAV) for adjusting the air amount of air supplied to a room (100); a general exhaust valve (GEX) for adjusting the amountof exhaust gas drawn from the room(100); and a controller (108) which determines at least one of the air supply air volume and the exhaust air volume and controls the air supply valve (MAV ) and the general exhaust valve (GEX), so that the difference between the air supply air volume and the exhaust air volume is consistent with the remaining air volume set value. When the air supply air volume ischanged relative to the previous air supply air volume, the residual air volume set value is corrected according to the changed air supply air volume so as retain the room pressure to an expected value.

Description

technical field [0001] The invention relates to a room pressure control system which keeps the room pressure constant by controlling the air supply air volume and exhaust air volume in the room. Background technique [0002] The room pressure control system is a system to keep the pressure of the room constant in order to prevent the leakage of the biological and chemical substances outside the room or the inflow of foreign impurities into the room, for example, when conducting experiments on handling biochemical substances in a fume hood. In this room pressure control system, the pressure is maintained by controlling the supply air valve and the exhaust valve so that the difference between the air volume of the supply air blown into the room and the air volume of the exhaust air drawn from the room becomes a predetermined air volume (residual air volume). Indoor positive and negative pressure control. [0003] In addition, in recent years, in order to improve the accuracy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/30F24F11/74F24F11/64
CPCF24F11/0001F24F11/64F24F11/74F24F2011/0002F24F2140/50
Inventor 大村林太郎大泽信雄
Owner YAMATAKE HONEYWELL CO LTD
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