JP6069789B2 - Supply / exhaust equipment - Google Patents

Description

The present invention relates to an air supply / exhaust system deployed in a facility that is required to prevent indoor entry of pollutants such as a pharmaceutical factory or an electronic parts factory,
Specifically, an air supply passage is provided to take in air from the outside by an air supply fan and supply the intake air to the adjustment target chamber, and an exhaust passage for discharging the indoor air of the adjustment target chamber to the outside with the air supply. Provided with a chamber pressure adjusting means for adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure by adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage in accordance with the supply / exhaust operation, An air supply side open / close damper that opens and closes the air supply path and an exhaust side open / close damper that opens and closes the exhaust path are provided, and the air supply side open / close damper and the exhaust side open / close damper are opened and supplied according to the start command of the air supply / exhaust operation. The present invention relates to an air supply / exhaust system provided with a control means for starting a fan.

  That is, in this air supply / exhaust system, the indoor pressure of the adjustment target chamber is set to be higher than the atmospheric pressure by adjusting the ventilation resistance (that is, the exhaust passage resistance) to the air discharged from the adjustment target chamber to the exhaust passage by the chamber pressure adjusting means. By adjusting to the room pressure, the contamination of the room to be adjusted is prevented from entering, and the room cleanliness of the room to be adjusted is kept high.

  In addition, when the supply / exhaust operation is stopped, the air supply side opening / closing damper interposed in the supply passage and the exhaust side opening / closing damper interposed in the exhaust passage are closed to prevent entry of contaminants into the adjustment target chamber, Further, when the supply / exhaust operation is stopped to decontaminate the adjustment target chamber with the decontamination gas, the decontamination gas from the adjustment target chamber to the outside is closed by closing the supply side opening / closing damper and the exhaust side opening / closing damper. As well as preventing leakage of contaminants into the adjustment target room.

  Conventionally, in this type of air supply / exhaust equipment, the control means receives a start command for the air supply / exhaust operation as start control for starting the air supply / exhaust operation from the stop state of the air supply / exhaust operation due to operation suspension or decontamination of the chamber to be adjusted. In order to avoid instability due to the so-called shut-off operation of the air supply fan, the air supply side opening / closing damper and the exhaust side opening / closing damper are first opened, and then the air supply fan is started.

  By the way, constantly changing outdoor wind pressure (outside wind pressure) acts on the air intake of the air supply path for taking in outdoor air, so that the pressure of the air supply path is affected by the outside wind pressure during the supply / exhaust operation. Fluctuates within a certain range (for example, a range of several Pa to several tens Pa), and when the air discharged from the chamber to be adjusted is discharged to the outside through the exhaust passage, it is also outside the air exhaust port of the exhaust passage. When the wind pressure acts, the pressure in the exhaust path also varies during the supply / exhaust operation.

  However, during the air supply / exhaust operation, the room pressure adjusting means keeps the room pressure of the adjustment target chamber in a state where the pressure of the portion after the air supply fan in the air supply path is sufficiently higher than the atmospheric pressure by the operation of the air supply fan. Is adjusted to a set room pressure higher than the atmospheric pressure, so even if the pressure in the air supply path or the exhaust path fluctuates due to the influence of the external wind pressure as described above, the room pressure in the chamber to be adjusted is higher than the atmospheric pressure. It is possible to prevent the contaminants from entering the adjustment target chamber due to the negative pressure in the adjustment target chamber.

  However, in the above-described conventional air supply / exhaust equipment, when the control means opens the air supply side opening / closing damper and the exhaust side opening / closing damper at the start of the air supply / exhaust operation, the air supply fan is still in the stopped state before starting, Due to fluctuations due to the external wind pressure, the pressure in the supply and exhaust passages may be temporarily lower than the atmospheric pressure (standard or average atmospheric pressure), even if temporarily, and this causes the adjustment target chamber to have a negative pressure. There has been a risk of contamination of the adjustment target chamber.

  In view of this situation, the main object of the present invention is to effectively solve the above-mentioned problem of intrusion of pollutants at the start of the air supply / exhaust operation by adopting a rational starting method.

Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
As a reference configuration of the air supply / exhaust equipment provided with a control means for opening the air supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the air supply / exhaust operation and starting the air supply fan ,
The control means activates the air supply fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches the set safety time, the supply side opening / closing damper and the exhaust side opening / closing damper may be opened .

According to this reference configuration, by setting an appropriate pressure or time as the set safety pressure or the set safety time, after the supply fan is started, the pressure in the supply passage and the chamber to be adjusted is adjusted. The air supply side opening / closing damper and the exhaust side opening / closing damper can be opened in a state sufficiently raised in advance by the above operation.

  Therefore, even if the pressure in the air supply path or the exhaust path fluctuates to the lower side due to the influence of the external wind pressure when opening the air supply side opening / closing damper and the exhaust side opening / closing damper, the negative pressure of the chamber to be adjusted is increased by the previously increased pressure. Thus, it is possible to effectively and reliably prevent entry of contaminants into the adjustment target chamber at the start of the air supply / exhaust operation.

  The air supply fan is operated with the air supply side open / close damper and exhaust side open / close damper closed. The air fan is operated until the detected pressure of the pressure sensor rises to a set safe pressure higher than the atmospheric pressure or by a timer. Since the elapsed time from the start of the supplied air fan reaches the set safety time, setting an appropriate pressure or time as the set safety pressure or the set safety time as described above allows the supply fan to Instability due to the deadline operation can be sufficiently avoided.

In the implementation of this reference configuration, the chamber pressure adjusting means may perform the chamber pressure adjusting operation during the supply / exhaust operation and during the stop.

  In this case, while the supply / exhaust operation is stopped, the chamber pressure adjusting means cuts off the air discharge from the adjustment target chamber for the purpose of adjusting the indoor pressure of the adjustment target chamber to the set indoor pressure higher than the atmospheric pressure. To function.

In the implementation of the above reference configuration, the supply side opening / closing damper is preferably provided on the discharge side of the supply fan, but is not limited thereto, and may be provided on the suction side of the supply fan. It may be provided on both the discharge side and the suction side.

In contrast to this reference configuration, the first characteristic configuration of the present invention relates to a supply / exhaust system,
Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
An exhaust fan is installed in the exhaust path,
The control means activates the air supply fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a preset preliminary pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches the set preliminary time, the exhaust fan is started,
After the start of the exhaust fan, when the detected pressure of the pressure sensor rises to a set safe pressure higher than the atmospheric pressure, or the elapsed time from the start of the supply fan timed by the timer becomes the set safe time. When it reaches, the supply side opening / closing damper and the exhaust side opening / closing damper are configured to open.

According to this first characteristic configuration, in addition to being able to obtain basically the same operational effects as the reference configuration described above,
After the air supply fan is started, the exhaust fan can be started in a state where the pressure in the air supply path and the chamber to be adjusted is increased to some extent by the operation of the air supply fan.

Therefore, it is possible to reliably prevent the adjustment target chamber from becoming negative pressure due to the start of the exhaust fan even if it is not yet affected by the external wind pressure before the opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper. As a result, it is possible to more effectively and more reliably prevent contaminants from entering the adjustment target chamber at the start of the air supply / exhaust operation.

In contrast to the above-described reference configuration, the second characteristic configuration of the present invention relates to a supply / exhaust system,
Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
The control means activates the air supply fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches a set safety time, the supply side opening / closing damper and the exhaust side opening / closing damper are configured to open,
When the control means opens the supply side opening / closing damper and the exhaust side opening / closing damper, until the opening / closing sensor for detecting the opening / closing state of each of the opening / closing dampers detects the completion of the opening operation of each of the opening / closing dampers,
The rotation speed of the air supply fan is adjusted based on detection information of a pressure sensor that detects the pressure in the air supply path or the pressure in the adjustment target chamber, and the pressure in the air supply path or the pressure in the adjustment target chamber is set to the supply air. The pressure at the start of opening operation of the side opening / closing damper and the exhaust side opening / closing damper is maintained,
Thereafter, when the opening / closing sensor detects completion of the opening operation of each of the supply side opening / closing damper and the exhaust side opening / closing damper, the number of rotations of the supply fan is increased to adjust the pressure in the supply passage or to be adjusted. The chamber pressure is increased from the pressure at the start of the opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper.

According to the second feature configuration, in addition to being able to obtain basically the same operational effects as the reference configuration described above,
The opening / closing dampers are opened and operated while the pressure in the supply passage or the pressure in the chamber to be adjusted is maintained at the pressure at the start of the opening operation of the supply / opening damper and the exhaust opening / closing damper. Compared to opening and closing the air supply side open / close damper and the exhaust side open / close damper while increasing the pressure in the air supply path and the chamber to be adjusted toward the steady operation state, the air supply air volume when opening and closing these open / close dampers And the change in the exhaust air volume can be suppressed, and the supply / exhaust operation can be started smoothly and stably.

In contrast to the above reference configuration, the third characteristic configuration of the present invention relates to an air supply / exhaust system,
Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
An exhaust fan is installed in the exhaust path,
The control means activates the air supply fan and the exhaust fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches a set safety time, the air supply side opening / closing damper and the exhaust side opening / closing damper are opened,
When opening these open / close dampers, until completion of the open operation of each of the open / close dampers is detected by an open / close sensor that detects the open / close state of each of the supply side open / close damper and the exhaust side open / close damper,
The rotation speed of the air supply fan is adjusted based on detection information of a pressure sensor that detects the pressure in the air supply path or the pressure in the adjustment target chamber, and the pressure in the air supply path or the pressure in the adjustment target chamber is set to the supply air. The pressure at the start of opening operation of the side opening / closing damper and the exhaust side opening / closing damper is maintained,
And adjusting the number of rotations of the exhaust fan based on detection information of an exhaust side pressure sensor for detecting the pressure of the exhaust path, and adjusting the pressure of the exhaust path to open the supply side opening / closing damper and the exhaust side opening / closing damper. Hold the pressure at the start of operation,
Thereafter, when the opening / closing sensor detects the completion of the opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper,
Increasing the rotation speed of the air supply fan to increase the pressure of the air supply path or the pressure of the adjustment target chamber from the pressure at the start of opening operation of the air supply side opening / closing damper and the exhaust side opening / closing damper,
The number of revolutions of the exhaust fan is increased to reduce the pressure in the exhaust passage from the pressure at the start of opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper.

According to the third feature configuration, in addition to being able to obtain basically the same operational effects as the reference configuration described above,
In a configuration in which an exhaust fan is installed in the exhaust path, the rotation speed of the supply fan is increased to increase the pressure of the supply path and the chamber to be adjusted toward the steady operation state, and the rotation speed of the exhaust fan is increased. Compared to opening and closing the air supply side opening and closing damper and the exhaust side opening and closing damper while lowering the pressure in the exhaust passage, it is possible to suppress changes in the supply air volume and exhaust air volume when opening and closing these opening and closing dampers. Therefore, the supply / exhaust operation can be started smoothly and stably.

In the implementation of the configuration in which the exhaust fan is provided, the exhaust side opening / closing damper is desirably provided on the suction side of the exhaust fan, but is not limited thereto, and may be provided on the discharge side of the exhaust fan. May be provided on both the suction side and the suction side.

The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the first to third characteristic configurations,
The control means is configured to activate the chamber pressure adjusting means when opening the supply side opening / closing damper and the exhaust side opening / closing damper.

According to this configuration, when the supply side opening / closing damper and the exhaust side opening / closing damper are opened (that is, when the indoor pressure can be adjusted by adjusting the ventilation resistance with respect to the air discharged from the adjustment target chamber), it is promptly performed. The chamber pressure adjusting operation of the chamber pressure adjusting means can be started to contribute to prevention of negative pressure in the adjustment target chamber.

In contrast to the above reference configuration, the fifth characteristic configuration of the present invention relates to a supply / exhaust system,
Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply ,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
Provide a preload fan that takes air into the air supply path from outside,
The control means activates the preload fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
Thereafter, when the detected pressure of the pressure sensor for detecting the pressure of the air supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than atmospheric pressure, the air supply fan is activated to open and close the air supply side The damper and the exhaust side opening / closing damper are opened, and the preload fan is stopped.

According to the fifth characteristic configuration, as in the above-described reference configuration, by setting an appropriate pressure as the set safety pressure, the pressure in the air supply path and the chamber to be adjusted is preloaded after the preload fan is started. The air supply side opening / closing damper and the exhaust side opening / closing damper can be opened with the fan sufficiently raised in advance.

Therefore, even if the pressure in the air supply path or the exhaust path fluctuates to the lower side due to the influence of the external wind pressure when opening the air supply side opening / closing damper and the exhaust side opening / closing damper, the negative pressure of the chamber to be adjusted is increased by the previously increased pressure. Pressure can be prevented.

Thereby, it is possible to effectively and reliably prevent contaminants from entering the adjustment target chamber at the start of the air supply / exhaust operation.

In addition, the preload fan is operated with the supply side opening / closing damper and the exhaust side opening / closing damper being closed until the detected pressure of the pressure sensor rises to a set safety pressure higher than the atmospheric pressure. By setting an appropriate pressure as the set safety pressure, instability due to the preload fan shutoff operation can be sufficiently avoided.

As in the above-described reference configuration, in the implementation of the fifth characteristic configuration, the chamber pressure adjusting means may perform the chamber pressure adjusting operation during the supply / exhaust operation and during the stop.

Further, similarly to the above-described reference configuration, in the implementation of the fifth characteristic configuration, it is desirable to provide the supply side opening / closing damper on the discharge side of the preload fan.

However, the present invention is not limited thereto, and the air supply side opening / closing damper may be provided on the suction side of the preload fan.

The air supply side opening / closing damper may be provided on both the discharge side and the suction side of the preload fan.

Equipment configuration diagram of air supply and exhaust equipment Graph showing start-up mode of air supply / exhaust operation in reference example The graph which shows the starting form of the air supply / exhaust operation in 1st Embodiment The graph which shows the starting form of the air supply / exhaust operation in 2nd Embodiment

[ Reference example ]
Fig. 1 shows the air supply and exhaust equipment, and an external intake 1 for taking in outdoor air OA (outside air) and an external outlet 2 for exhausting exhaust air EA from the building to the outside are installed at appropriate locations such as the rooftop of the building. The external intake 1 is connected to the upstream end of the main air supply passage 3, and the external discharge port 2 is connected to the downstream end of the main exhaust passage 4.

  A branch supply passage 3a from the main supply passage 3 and a branch exhaust passage 4a from the main exhaust passage 4 are connected to the plurality of adjustment target rooms 5 in the building, respectively. The downstream portion of the exhaust passage 4 is connected by a circulation passage 6.

  An outside air damper D1 is interposed in a portion of the main air supply path 3 upstream of the connection location of the circulation path 6 and an exhaust damper D2 is provided in a portion of the main exhaust path 4 downstream of the connection location of the circulation path 6. The circulation path 6 is provided with a circulation damper D3.

  An air conditioner 7 and an air supply fan Fs are interposed in a portion of the main air supply path 3 downstream of the connection place of the circulation path 6, and the main air supply path is provided at the discharge side of the air supply fan Fs. An airtight damper Ds is provided, and an exhaust fan Fr is interposed in a portion of the main exhaust path 4 upstream of the connection place of the circulation path 6, and the main exhaust path is provided on the suction side of the exhaust fan Fr. An airtight damper Dr is provided.

  The airtight dampers Ds and Dr have higher airtightness when fully closed than ordinary dampers, and prevent leakage of gas through the damper when fully closed.

  A branch air supply path 3a connected to each adjustment target chamber 5 includes a constant air volume device 8 that automatically adjusts the supply air volume qs for the adjustment target chamber 5 to the set supply air volume qss of each adjustment target chamber 5, and a branch supply An airtight damper Dss for the air passage and a high performance filter 9 are arranged in that order from the main air supply passage 3 side, and the branch exhaust passage 4a connected to each adjustment target chamber 5 has a chamber pressure. The adjustment damper 10 and the airtight damper Drr for the branch exhaust path are arranged side by side from the main exhaust path 4 in that order.

The chamber pressure adjustment damper 10 adjusts the indoor pressure pa of the adjustment target chamber 5 by adjusting the ventilation resistance (in other words, the airflow resistance of the branch exhaust passage 4a) to the air discharged from the adjustment target chamber 5. Yes, between the indoor pressure pa of the adjustment target chamber 5 detected by the chamber pressure sensor 11 (specifically, the pressure difference of the adjustment target chamber 5 with respect to the reference pressure applied through the reference pressure pipe 12) and the set indoor pressure pas. By adjusting the opening of the chamber pressure adjusting damper 10 by the chamber pressure adjuster 13 according to the deviation Δpa, the chamber pressure pa of the chamber 5 to be adjusted is adjusted to the set chamber pressure pas set higher than the atmospheric pressure.

  That is, the chamber pressure adjustment damper 10 and the chamber pressure adjuster 13 adjust the indoor pressure pa of the adjustment target chamber 5 to the set indoor pressure pas by adjusting the ventilation resistance to the air discharged from the adjustment target chamber 5. It functions as means Pc.

  On the other hand, with respect to the main air supply path 3, the supply air pressure ps (specifically, the reference pressure pipe 12) detected by the air pressure sensor 14 provided in the main air supply path 3 on the discharge side of the air supply fan Fs. The main air supply path 3 is adjusted by inverter control of the rotation speed of the air supply fan Fs in accordance with the deviation Δps between the set supply air pressure pss and the pressure difference of the main air supply path 3 with respect to the reference pressure applied through Is provided with an air supply fan controller 15 for adjusting the air supply pressure ps to the set air supply pressure pss.

  Further, the exhaust pressure pr detected by the exhaust pressure sensor 16 provided in the main exhaust passage 4 on the suction side of the exhaust fan Fr (specifically, through the reference pressure pipe 12 is applied to the main exhaust passage 4). The exhaust pressure pr in the main exhaust passage 4 is set to the set exhaust pressure by adjusting the rotational speed of the exhaust fan Fr by inverter control according to the deviation Δpr between the pressure difference of the main exhaust passage 4 with respect to the reference pressure) and the set exhaust pressure prs. An exhaust fan controller 17 for adjusting to prs is provided.

  The set air supply pressure pss and the set exhaust gas pressure prs are specified to the air supply fan controller 15 and the exhaust fan controller 17 by a host operation controller 18 as a control means. By changing the set air supply pressure pss specified for the air supply fan controller 15 in accordance with the opening state of the constant air volume device 8 in all the adjustment target chambers 5 in the situation where the operation is in a steady operation state, Each of the constant air volume devices 8 is configured to perform an air volume adjustment function in an opening state with high controllability.

  Similarly, the operation controller 18 sets the set exhaust pressure prs specified to the exhaust fan controller 17 in the state where the supply / exhaust operation is in a steady operation state, and the opening degree of the chamber pressure adjustment damper 10 in all the adjustment target chambers 5. By changing according to the state, each of the chamber pressure adjusting dampers 10 functions to adjust the air flow in an opening state with high controllability.

  The operation controller 18 selectively performs the supply / exhaust operation in the circulation mode and the supply / exhaust operation in the all-outside air mode according to the mode switching command. In the supply / exhaust operation in the circulation mode, the operation controller 18 operates the outside air damper D1. The exhaust damper D2 and the circulation damper D3 are opened, and the air supply fan Fs and the exhaust fan Fr are operated with all the airtight dampers Ds, Dr, Dss, Drr opened, and thus the air intake fan Fs is taken in from the external intake 1 A mixed air of the outside air OA and the return air RA returning through the circulation path 6 is supplied to each adjustment target chamber 5 through the main supply path 3 and the branch supply path 3a.

  Moreover, the air volume equal to the intake air volume of the outside air OA out of the air EA discharged from each adjustment target chamber 5 to the main exhaust path 4 through the branch exhaust path 4a is discharged from the external discharge port 2 to the outside, and the remaining air volume is returned to the outside air. The air RA is led to the main air supply path 3 through the circulation path 6.

  This supply / exhaust operation in the circulation mode is performed in a normal air conditioning operation in which each adjustment target chamber 5 under operation is adjusted to a predetermined temperature and humidity state, and the mixed air of the outside air OA and the return air RA is air-conditioned. The machine 7 is adjusted to a required temperature and humidity state.

  On the other hand, in the supply / exhaust operation in the all outside air mode, the operation controller 18 closes the circulation damper D3, opens the outside air damper D1 and the exhaust damper D2, and opens all the airtight dampers Ds, Dr, Dss, Drr. Then, the air supply fan Fs and the exhaust fan Fr are operated, whereby only the outside air OA taken from the external intake port 1 is supplied to each adjustment target chamber 5 through the main air supply path 3 and the branch air supply path 3a.

  Further, the entire air volume of the air EA discharged from each adjustment target chamber 5 to the main exhaust passage 4 through the branch exhaust passage 4a is discharged from the external discharge port 2 to the outside.

  The supply / exhaust operation in the all-outside air mode is performed at the end of the decontamination operation in which the adjustment target chamber 5 is filled with a decontamination gas such as hydrogen peroxide water vapor to decontaminate (decontaminate) the adjustment target chamber 5. In addition, the decontamination gas remaining in the adjustment target chamber 5 is completely removed from the room by the supply / exhaust operation in the all outside air mode.

  In both the circulation mode air supply / exhaust operation and the all outside air mode air supply / exhaust operation, the operation controller 18 adjusts the supply air volume qs by the constant air volume device 8 in each adjustment target chamber 5. For the adjustment of the chamber pressure pa by the chamber pressure adjuster 13, the set supply air pressure pss specified in the supply fan controller 15 is changed to the opening state of the constant air volume device 8 in all the adjustment target chambers 5. The set exhaust pressure prs specified in the exhaust fan controller 17 is changed according to the opening state of the chamber pressure adjusting damper 10 in all the adjustment target chambers 5.

  In addition, when a stop command for supply / exhaust operation is given during an operation stop or decontamination operation, the operation controller 18 stops the supply air fan Fs and the exhaust fan Fr, and the outside air damper D1, the exhaust damper D2, and the circulation. The damper D3 and all the airtight dampers Ds, Dr, Dss, Drr are closed, thereby preventing entry of contaminants into the respective adjustment target chambers 5, and the adjustment target in which decontamination is performed in the decontamination operation Prevent leakage of decontamination gas from the chamber 5 to the outside.

  Start-up control when starting the supply / exhaust operation in the circulation mode from the stop state of the supply / exhaust operation due to the suspension of operation, and the supply / exhaust operation in the all outside air mode when the decontamination operation ends from the stop state of the supply / exhaust operation due to the decontamination operation As the start-up control when starting the operation, the operation controller 18 sequentially executes the following controls (a1) to (a4) when receiving the start command for the air supply / exhaust operation (see FIG. 2). .

  (A1) Upon receiving the start command for the supply / exhaust operation, the fan start command is issued with the outside air damper D1, the exhaust damper D2, the circulation damper D3, and all the airtight dampers Ds, Dr, Dss, Drr closed. The air supply fan controller 15 and the exhaust fan controller 17 are provided to start the air supply fan Fs and the exhaust fan Fr simultaneously.

  (A2) Following the simultaneous activation of the fans Fs and Fr, the set supply pressure pss designated for the supply fan controller 15 is gradually changed at the predetermined change speed vs toward the set initial supply pressure ps1. Thus, by adjusting the rotation speed of the supply fan Fs by the supply fan controller 15, the supply pressure ps of the main supply passage 3 on the discharge side of the supply fan Fs follows the change of the set supply pressure pss. And gradually increase.

  At the same time, the set exhaust pressure prs specified for the exhaust fan controller 17 is set at a predetermined change speed vr toward the set initial exhaust pressure pr1 whose absolute value is smaller than the set initial supply pressure ps1. The exhaust gas pressure pr of the main exhaust passage 4 on the suction side of the exhaust fan Fr is made to follow the change of the set exhaust gas pressure prs by adjusting the rotational speed of the exhaust fan Fr by the exhaust fan controller 17 gradually. Decrease gradually.

  In FIG. 2, the set exhaust pressure prs is indicated by its absolute value.

  (A3) In the increase of the supply air pressure ps due to the change of the set supply air pressure pss, when the supply air pressure ps detected by the air supply pressure sensor 14 becomes the set safety pressure ps2 higher than the atmospheric pressure, the circulation mode air supply / exhaust operation is started. In this case, each of the outside air damper D1, the exhaust damper D2, and the circulation damper D3 is opened, and when the air supply / exhaust operation in the all outside air mode is started, the outside air damper D1 and the exhaust damper with the circulation damper D3 kept closed. Open D2.

  Following this, all the airtight dampers Ds, Dr, Dss, Drr are opened.

  At this time, the airtight dampers Ds, Drr for the branch air supply passage and the branch exhaust passage are opened at the same time, or the airtight damper Dss of the adjustment target chamber 5 having a high importance or the adjustment target chamber 5 having a high set room pressure pas. Any of the methods of opening sequentially from Drr may be adopted.

  (A4) On the condition that the completion of the opening operation of each damper that has been opened is detected by the open / close sensor 19 that detects the open / close state of each damper, the detected supply air pressure ps by the supply air pressure sensor 14 is set to the initial initial supply air When the pressure ps1 is reached and the detected exhaust pressure pr detected by the exhaust pressure sensor 16 reaches the set initial exhaust pressure pr1, the start-up control is terminated, and the operation proceeds to the above-described supply / exhaust operation in the steady operation state.

  As soon as the air supply fan Fs is started, the operation controller 18 starts monitoring the abnormality of the indoor pressure pa, the air supply pressure ps, the exhaust gas pressure pr and the operation of each part, and when an abnormality occurs, the air supply / exhaust operation is started. Emergency stop to protect equipment.

  Further, in the air supply / exhaust equipment of this example, even when the supply / exhaust operation is stopped, the room pressure adjustment by the room pressure adjusting means Pc (that is, the room pressure adjustment damper 10 and the room pressure adjuster 13) is continuously executed. When the supply / exhaust operation is stopped, the chamber pressure adjustment by the chamber pressure adjusting means Pc may be stopped, and the chamber pressure adjustment by the chamber pressure adjusting means Pc may be activated when the damper is opened.

  As described above, in this air supply / exhaust system, at the start of the air supply / exhaust operation, the dampers D1, Ds, Dss that open and close the air supply passages 3, 3a and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are provided. Prior to opening the air supply fan Fs, when the detected pressure ps by the air pressure sensor 14 rises to a set safety pressure ps2 higher than the atmospheric pressure, the dampers D1, Ds in the air supply passages 3, 3a , Dss, and dampers D2, Dr, Drr in the exhaust passages 4, 4a are opened.

  Accordingly, when the dampers D1, Ds, Dss in the supply passages 3, 3a and the dampers D2, Dr, Drr in the exhaust passages 4, 4a are opened, the external wind pressure acting on the external intake port 1 and the external discharge port 2 is opened. Even if the pressures of the air supply passages 3, 3a and the exhaust passages 4, 4a fluctuate to the lower side due to the influence of the air pressure, the negative pressure of the adjustment target chamber 5 is reduced by the pressure ps previously increased by the preceding activation of the air supply fan Fs. In this way, it is possible to effectively and reliably prevent contaminants from entering the adjustment target chamber 5 at the start of the air supply / exhaust operation.

First Embodiment
In the first embodiment, in the supply / exhaust facility shown in FIG. 1, the start control when starting the supply / exhaust operation in the circulation mode from the stop state of the supply / exhaust operation due to the operation suspension, and the supply / exhaust operation by the decontamination operation As the start-up control when starting the supply / exhaust operation in the all-outside air mode at the end of the decontamination operation from the stop state, the operation controller 18 receives the start command for the supply / exhaust operation, and then receives the following (b1), (b2 ) Are sequentially executed (see FIG. 3).

  (B1) When the start command for the supply / exhaust operation is received, the fan start command is issued with the outside air damper D1, the exhaust damper D2, the circulation damper D3, and all the airtight dampers Ds, Dr, Dss, Drr closed. The air supply fan controller 15 is activated to start the air supply fan Fs.

  Then, following the activation of the air supply fan Fs, the set air supply pressure pss designated for the air supply fan controller 15 is gradually changed at the predetermined change speed vs toward the set initial air supply pressure ps1, Thus, by adjusting the rotation speed of the supply fan Fs by the supply fan controller 15, the supply pressure ps of the main supply passage 3 on the discharge side of the supply fan Fs is made to follow the change of the set supply pressure pss. Raise gradually.

  (B2) The exhaust fan Fr is activated when the supply air pressure ps detected by the supply air pressure sensor 14 becomes the set preliminary pressure ps3 in the increase of the supply air pressure ps due to the change in the set supply air pressure pss.

  Then, following the start of the exhaust fan Fr, the absolute value of the set exhaust pressure prs designated for the exhaust fan controller 17 is changed to the set initial supply pressure ps1 in parallel with the change of the set supply air pressure pss. The main exhaust path on the suction side of the exhaust fan Fr is gradually changed toward the smaller set initial exhaust pressure pr1 at a predetermined change speed vr, thereby adjusting the rotational speed of the exhaust fan Fr by the exhaust fan controller 17. The exhaust pressure pr of 4 is gradually decreased following the change of the set exhaust pressure prs.

  In FIG. 3, the set exhaust pressure prs is indicated by its absolute value.

Thereafter, the control is similar to the control of (a3) and (a4) shown in the reference example , and the detected supply air pressure ps by the supply air pressure sensor 14 is higher than the atmospheric pressure when the supply air pressure ps is increased by changing the set supply air pressure pss. When the set safety pressure ps2 is high, when the supply / exhaust operation in the circulation mode is started, each of the outside air damper D1, the exhaust damper D2, and the circulation damper D3 is opened, and when the supply / exhaust operation in the all outside air mode is started, Then, the outside damper D1 and the exhaust damper D2 are opened while the circulation damper D3 is closed, and then all the airtight dampers Ds, Dr, Dss, Drr are opened.

That is, also in the first embodiment, at the start of the air supply / exhaust operation, the dampers D1, Ds, Dss that open and close the air supply passages 3, 3a and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are provided. Prior to opening, the air supply fan Fs and the exhaust fan Fr are started, and then when the detected pressure ps by the air pressure sensor 14 rises to a set safety pressure ps2 higher than the atmospheric pressure, the air supply passages 3 and 3a The dampers D1, Ds, Dss and the dampers D2, Dr, Drr in the exhaust passages 4, 4a are opened, thereby preventing negative pressure in the adjustment target chamber 5 due to the influence of the external wind pressure during the damper opening operation. .

In the first embodiment as well, the airtight dampers Dss and Drr for the branch air supply passage and the branch exhaust passage are opened at the same time, or the adjustment target chamber 5 having high importance or the high adjustment of the set indoor pressure pas. Any of the methods of opening sequentially from the airtight dampers Dss and Drr of the target chamber 5 may be adopted.

  Further, the chamber pressure adjustment by the chamber pressure adjusting means Pc is continuously executed when the supply / exhaust operation is stopped, or the chamber pressure adjustment by the chamber pressure adjusting means Pc is stopped when the supply / exhaust operation is stopped. Any method of starting the chamber pressure adjustment by the chamber pressure adjusting means Pc at the time of opening each damper may be adopted.

[ Second Embodiment]
In the second embodiment, in the air supply / exhaust system shown in FIG. 1, the start control when starting the air supply / exhaust operation in the circulation mode from the stop state of the air supply / exhaust operation due to the operation stop, and the air supply / exhaust operation by the decontamination operation When starting the supply / exhaust operation in the all-outside air mode at the end of the decontamination operation from the stop state, the operation controller 18 receives the start command for the supply / exhaust operation and receives the following (c1) to (c4) ) Are sequentially executed (see FIG. 4).

(C1) When a start command for supply / exhaust operation is received, the outside air damper D1, the exhaust damper D2, the circulation damper D3, and all the airtight dampers Ds, Dr, Dss, Drr are kept closed and shown in the reference example . Similarly to the control in (a1), a fan activation command is given to the air supply fan controller 15 and the exhaust fan controller 17, and the air supply fan Fs and the exhaust fan Fr are activated simultaneously.

Alternatively, as indicated by a broken line in FIG. 4, similar to the control of (b1) and (b2) shown in the first embodiment, first, a fan start command is given to the supply fan controller 15 to supply the supply fan Fs. After the start, a fan start command is given to the exhaust fan controller 17 to start the exhaust fan Fr.

  (C2) Following the start of these fans Fs and Fr, the set supply pressure pss designated for the supply fan controller 15 is gradually changed at the predetermined change speed vs toward the set initial supply pressure ps1. Thus, by adjusting the rotation speed of the supply fan Fs by the supply fan controller 15, the supply pressure ps of the main supply passage 3 on the discharge side of the supply fan Fs is made to follow the change of the set supply pressure pss. Gradually increase.

  At the same time, the set exhaust pressure prs specified for the exhaust fan controller 17 is set at a predetermined change speed vr toward the set initial exhaust pressure pr1 whose absolute value is smaller than the set initial supply pressure ps1. The exhaust gas pressure pr of the main exhaust passage 4 on the suction side of the exhaust fan Fr is made to follow the change of the set exhaust gas pressure prs by adjusting the rotational speed of the exhaust fan Fr by the exhaust fan controller 17 gradually. Decrease gradually.

  In FIG. 4, the set exhaust pressure prs is indicated by its absolute value.

(C3) Similar to the control of (a3) shown in the reference example , the set safe pressure at which the detected supply pressure ps detected by the supply pressure sensor 14 is higher than the atmospheric pressure when the supply pressure ps is increased by changing the set supply pressure pss. At ps2, when starting the supply / exhaust operation in the circulation mode, each of the outside air damper D1, the exhaust damper D2, and the circulation damper D3 is opened, and when starting the supply / exhaust operation in the all outside air mode, the circulation damper D3 is opened. The outside air damper D1 and the exhaust damper D2 are opened in a state where is closed.

  Following this, all the airtight dampers Ds, Dr, Dss, Drr are opened.

  Then, with the start of the damper opening operation, the set supply air pressure pss specified for the supply air fan controller 15 and the set exhaust pressure prs specified for the exhaust fan controller 17 are changed to the start time of the damper opening operation. Thus, the supply pressure ps in the supply passage 3 and the exhaust pressure pr in the exhaust passage 4 are held at the pressure at the start of the damper opening operation.

  (C4) When completion of the opening operation of all the opened dampers is detected by the open / close sensor 19 that detects the open / close state of each damper, the set supply air pressure pss specified to the supply air fan controller 15 and the exhaust gas Each of the set exhaust pressures prs specified in the fan controller 17 is gradually changed again at the predetermined change speeds vs and vr toward the set initial supply air pressure ps1 and the set initial exhaust pressure pr1, and the supply air fan The supply pressure ps of the main supply passage 3 on the discharge side of Fs is gradually increased again, and the exhaust pressure pr of the main exhaust passage 4 on the intake side of the exhaust fan Fr is gradually decreased again.

Thereafter, the control is the same as the control of (a4) shown in the reference example. The detected supply pressure ps by the supply pressure sensor 14 reaches the set initial supply pressure ps1, and the detected exhaust pressure pr by the exhaust pressure sensor 16 is When the set initial exhaust pressure pr1 is reached, the start-up control is terminated, and the operation proceeds to the above-described supply / exhaust operation in the steady operation state.

That is, also in the second embodiment, at the start of the air supply / exhaust operation, the dampers D1, Ds, Dss that open and close the air supply passages 3, 3a and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are provided. Prior to opening, the air supply fan Fs and the exhaust fan Fr are started, and then when the detected pressure ps by the air pressure sensor 14 rises to a set safety pressure ps2 higher than the atmospheric pressure, the air supply passages 3 and 3a The dampers D1, Ds, Dss and the dampers D2, Dr, Drr in the exhaust passages 4, 4a are opened, thereby preventing negative pressure in the adjustment target chamber 5 due to the influence of the external wind pressure during the damper opening operation. .

Also in the second embodiment, the airtight dampers Dss and Drr for the branch air supply passage and the branch exhaust passage are opened at the same time, or the adjustment target chamber 5 having high importance or the adjustment target chamber having a high set indoor pressure pas. Any of the five airtight dampers Dss and Drr may be used.

  Further, the chamber pressure adjustment by the chamber pressure adjusting means Pc is continuously executed when the supply / exhaust operation is stopped, or the chamber pressure adjustment by the chamber pressure adjusting means Pc is stopped when the supply / exhaust operation is stopped. Any method of starting the chamber pressure adjustment by the chamber pressure adjusting means Pc at the time of opening each damper may be adopted.

[ Third Embodiment]
In the third embodiment, a preload fan 20 is provided in parallel with the air supply fan Fs in the air supply / exhaust equipment shown in FIG.

  In addition, a preload fan path through which the air sent to the adjustment target chamber 5 side passes through the supply fan Fs without passing through the supply fan Fs, and the air sent to the adjustment target chamber 5 side is supplied to the preload fan 20. Switching dampers 21a and 21b that selectively switch the air supply path of the main air supply path 3 to the air supply fan path that passes through the air supply fan Fs without passing therethrough are provided.

  And in this equipment configuration, the start control when starting the supply / exhaust operation in the circulation mode from the stop state of the supply / exhaust operation due to the operation stop, and the end of the decontamination operation from the stop state of the supply / exhaust operation by the decontamination operation As start-up control when starting the supply / exhaust operation in the all outside air mode, the operation controller 18 sequentially executes the following controls (d1) to (d4) when receiving the start command for the supply / exhaust operation. It is.

  (D1) When the start command for the air supply / exhaust operation is received, the outside air damper D1, the exhaust damper D2, the circulation damper D3, and all the airtight dampers Ds, Dr, Dss, Drr remain closed, and the air supply With the fan Fs and the exhaust fan Fr stopped, the preload fan 20 is started.

  At this time, the air supply path of the main air supply path 3 is switched to the preload fan path through which the air sent to the adjustment target chamber 5 side passes through the preload fan 20 by switching by the switching dampers 21a and 21b.

  (D2) Thereafter, when the supply air pressure ps detected by the supply air pressure sensor 14 becomes the set safety pressure ps2 higher than the atmospheric pressure in the increase of the supply air pressure ps due to the operation of the preload fan 20, the fan start command is supplied to the supply air fan controller 15 And supply to the exhaust fan controller 17 to start the air supply fan Fs and the exhaust fan Fr.

  As the air supply fan Fs and the exhaust fan Fr are started, the supply air path of the main air supply path 3 is switched to the air supply fan path by switching by the switching dampers 21a and 21b, and the circulation mode air supply / exhaust operation is started. In this case, the outside air damper D1, the exhaust damper D2, and the circulation damper D3 are each opened, and when the air supply / exhaust operation in the all outside air mode is started, the outside air damper D1 and the exhaust gas with the circulation damper D3 kept closed. Open damper D2.

  Further, all the airtight dampers Ds, Dr, Dss, Drr are opened, and then the preload fan 20 is stopped.

  (D3) After the supply fan Fs and the exhaust fan Fr are started, the set supply pressure pss designated for the supply fan controller 15 is gradually changed to the set initial supply pressure ps1 at a predetermined change speed vs. And the set exhaust pressure prs specified for the exhaust fan controller 17 is gradually changed at a predetermined change speed vr toward the set initial exhaust pressure pr1 whose absolute value is smaller than the set initial supply air pressure ps1. change.

  (D4) On the condition that the completion of the opening operation of each damper that has been opened is detected by the open / close sensor 19 that detects the open / close state of each damper, the detected supply air pressure ps by the supply air pressure sensor 14 is set to the initial initial supply air When the pressure ps1 is reached and the detected exhaust pressure pr detected by the exhaust pressure sensor 16 reaches the set initial exhaust pressure pr1, the start-up control is terminated, and the operation proceeds to the above-described supply / exhaust operation in the steady operation state.

That is, also in the third embodiment, at the start of the air supply / exhaust operation, the dampers D1, Ds, Dss that open and close the air supply passages 3, 3a and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are provided. Prior to opening, the preload fan 20 is activated, and when the detected pressure ps by the supply air pressure sensor 14 rises to a set safety pressure ps2 higher than the atmospheric pressure, the dampers D1, Ds, Dss and the dampers D2, Dr, Drr in the exhaust passages 4, 4a are opened, thereby preventing negative pressure in the adjustment target chamber 5 due to the influence of the external wind pressure during the damper opening operation.

In the third embodiment, the airtight dampers Dss and Drr for the branch air supply passage and the branch exhaust passage are simultaneously opened, or the adjustment target chamber 5 having a high importance or the adjustment of the set indoor pressure pas is high. Any of the methods of opening sequentially from the airtight dampers Dss and Drr of the target chamber 5 may be adopted.

  Further, the chamber pressure adjustment by the chamber pressure adjusting means Pc is continuously executed when the supply / exhaust operation is stopped, or the chamber pressure adjustment by the chamber pressure adjusting means Pc is stopped when the supply / exhaust operation is stopped. Any method of starting the chamber pressure adjustment by the chamber pressure adjusting means Pc at the time of opening each damper may be adopted.

[Other Embodiments]
In both the first and second embodiments described above, when the supply air pressure ps detected by the supply air pressure sensor 14 rises to the set safety pressure ps2 after the air supply fan Fs is started, the air supply passages 3 and 3a are opened and closed. The dampers D1, Ds, Ds and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are opened. Instead, after the supply air fan Fs is started, the chamber to be adjusted by the chamber pressure sensor 11 When the detection chamber pressure pa of 5 rises to the set safe pressure ps2, the dampers D1, Ds, Dss that open and close the air supply passages 3, 3a and the dampers D2, Dr, Drr that open and close the exhaust passages 4, 4a are opened. You may do it.

  Alternatively, the dampers D1, D2, Ds, Dr, Dss, Drr when the elapsed time T from the start of the supply fan, which is timed by a timer, reaches the set safety time T1 after the supply fan Fs is started. May be opened.

On the other hand, as shown in the first embodiment, when the exhaust fan Fr is started later than the start of the supply fan Fs, the detected supply pressure ps by the supply pressure sensor 14 is set as a preliminary setting after the supply fan Fs is started. Instead of starting the exhaust fan Fr when the pressure increases to the pressure ps3, after the air supply fan Fs is started, the detected chamber pressure pa of the chamber 5 to be adjusted by the chamber pressure sensor 11 increases to the set preliminary pressure ps3. The exhaust fan Fr may be activated.

  Alternatively, after the air supply fan Fs is started, the exhaust fan Fr may be started when the elapsed time T from the time when the air supply fan is started, which is timed by a timer, reaches the set preliminary time T2.

  In each of the above-described embodiments, the airtight dampers Ds, Dr, Dss, and Drr are opened following the opening operation of the outside air damper D1 and the exhaust damper D2, but instead, the airtight dampers Ds, Dr, Dss are opened. , Following the opening operation of Drr, the outside air damper D1 and the exhaust damper D2 are opened, or the opening operation of the outside air damper D1 and the exhaust damper D2 and the opening operation of each airtight damper Ds, Dr, Dss, Drr are performed simultaneously. You may do it.

  The air supply side opening / closing damper that opens and closes the air supply passages 3 and 3a may be interposed on either the discharge side or the suction side of the air supply fan Fs, and the exhaust side damper that opens and closes the exhaust passages 4 and 4a. The exhaust fan Fr may be interposed on either the suction side or the discharge side.

  The adjustment target chamber 5 connecting the air supply passages 3 and 3a and the exhaust passages 4 and 4a may be either a plurality of chambers or a single chamber.

  The supply / exhaust system according to the present invention can be used for supply / exhaust operation for various purposes in various fields where it is required to prevent contaminants from entering the room.

Fs Air supply fan OA Outdoor air 5 Adjustment target chambers 3, 3a Air supply passage 4, 4a Exhaust passage pa Pressure of adjustment target chamber paa Set indoor pressure Pc (10, 13) Room pressure adjusting means D1, Ds, Dss Supply side Open / close damper D2, Dr, Drr Exhaust side open / close damper 18 Control means ps Supply path pressure 11 Pressure sensor 14 Pressure sensor ps2 Set safety pressure T Elapsed time T1 Set safety time Fr Exhaust fan ps3 Set reserve pressure T2 Set reserve time 19 Open / close Sensor pr Exhaust path pressure 16 Exhaust pressure sensor 20 Preload fan

Claims (5)

Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
An exhaust fan is installed in the exhaust path,
The control means activates the air supply fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a preset preliminary pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches the set preliminary time, the exhaust fan is started,
After the start of the exhaust fan, when the detected pressure of the pressure sensor rises to a set safe pressure higher than the atmospheric pressure, or the elapsed time from the start of the supply fan timed by the timer becomes the set safe time. An air supply / exhaust system configured to open the air supply side opening / closing damper and the exhaust side opening / closing damper when reaching. Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
The control means activates the air supply fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches a set safety time, the supply side opening / closing damper and the exhaust side opening / closing damper are configured to open,
When the control means opens the supply side opening / closing damper and the exhaust side opening / closing damper, until the opening / closing sensor for detecting the opening / closing state of each of the opening / closing dampers detects the completion of the opening operation of each of the opening / closing dampers,
The rotation speed of the air supply fan is adjusted based on detection information of a pressure sensor that detects the pressure in the air supply path or the pressure in the adjustment target chamber, and the pressure in the air supply path or the pressure in the adjustment target chamber is set to the supply air. The pressure at the start of opening operation of the side opening / closing damper and the exhaust side opening / closing damper is maintained,
Thereafter, when the opening / closing sensor detects completion of the opening operation of each of the supply side opening / closing damper and the exhaust side opening / closing damper, the number of rotations of the supply fan is increased to adjust the pressure in the supply passage or to be adjusted. A supply / exhaust system configured to increase the pressure of the chamber from the pressure at the start of opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper . Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
An exhaust fan is installed in the exhaust path,
The control means activates the air supply fan and the exhaust fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
After that, when the detected pressure of the pressure sensor for detecting the pressure of the supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than the atmospheric pressure, or from the start of the supply fan timed by a timer When the elapsed time reaches a set safety time, the air supply side opening / closing damper and the exhaust side opening / closing damper are opened,
When opening these open / close dampers, until completion of the open operation of each of the open / close dampers is detected by an open / close sensor that detects the open / close state of each of the supply side open / close damper and the exhaust side open / close damper,
The rotation speed of the air supply fan is adjusted based on detection information of a pressure sensor that detects the pressure in the air supply path or the pressure in the adjustment target chamber, and the pressure in the air supply path or the pressure in the adjustment target chamber is set to the supply air. The pressure at the start of opening operation of the side opening / closing damper and the exhaust side opening / closing damper is maintained,
And adjusting the number of rotations of the exhaust fan based on detection information of an exhaust side pressure sensor for detecting the pressure of the exhaust path, and adjusting the pressure of the exhaust path to open the supply side opening / closing damper and the exhaust side opening / closing damper. Hold the pressure at the start of operation,
Thereafter, when the opening / closing sensor detects the completion of the opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper,
Increasing the rotation speed of the air supply fan to increase the pressure of the air supply path or the pressure of the adjustment target chamber from the pressure at the start of opening operation of the air supply side opening / closing damper and the exhaust side opening / closing damper,
An air supply / exhaust system configured to increase the rotational speed of the exhaust fan to reduce the pressure in the exhaust passage from the pressure at the start of opening operation of the supply side opening / closing damper and the exhaust side opening / closing damper . The supply / exhaust equipment according to any one of claims 1 to 3, wherein the control means is configured to activate the chamber pressure adjusting means when the supply side opening / closing damper and the exhaust side opening / closing damper are opened . Incorporating air from the outside with an air supply fan and providing an air supply path for supplying the intake air to the adjustment target room, and providing an exhaust path for discharging the indoor air of the adjustment target room to the outside with the air supply,
With this air supply / exhaust operation, there is provided a chamber pressure adjusting means for adjusting the ventilation resistance to the air discharged from the adjustment target chamber to the exhaust passage and adjusting the indoor pressure of the adjustment target chamber to a set indoor pressure higher than the atmospheric pressure,
An air supply side opening / closing damper for opening and closing the air supply path, and an exhaust side opening / closing damper for opening and closing the exhaust path,
A supply / exhaust system provided with control means for opening the supply side opening / closing damper and the exhaust side opening / closing damper in response to a start command of the supply / exhaust operation and starting the supply fan,
Provide a preload fan that takes air into the air supply path from outside,
The control means activates the preload fan prior to opening the air supply side opening / closing damper and the exhaust side opening / closing damper when receiving a start command of the air supply / exhaust operation,
Thereafter, when the detected pressure of the pressure sensor for detecting the pressure of the air supply passage or the pressure of the adjustment target chamber rises to a set safety pressure higher than atmospheric pressure, the air supply fan is activated to open and close the air supply side A supply / exhaust system configured to open the damper and the exhaust-side opening / closing damper and stop the preload fan .

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