JP5117995B2 - Room pressure control system - Google Patents

Description

  The present invention relates to a room pressure control system applied to a clean room, a laboratory, or the like in a factory or a laboratory, and more specifically, an air supply fan that supplies outdoor air to a room subject to room pressure adjustment, and room air in the room An exhaust fan for discharging the air to the outside of the room and a chamber pressure sensor for detecting the chamber pressure of the target chamber, and adjusting the output of the air supply fan or the exhaust fan based on the detected chamber pressure by the chamber pressure sensor The present invention relates to a chamber pressure control system provided with control means for adjusting a chamber pressure of a target chamber to a set chamber pressure.

Conventionally, in this type of room pressure control system, an air supply based on a room pressure detected by a room pressure sensor is used to adjust and maintain the room pressure of a target room at a set room pressure against various room pressure change factors. There is one that adjusts the chamber pressure of the target chamber to the set chamber pressure only by adjusting the fan output (in short, adjusting the amount of air supplied to the target chamber by the air supply fan). There is no document to show, but a similar system is shown in Patent Document 1 below).
Japanese Utility Model Publication No. 4-120554

  However, in the above-mentioned conventional system, the required output of the supply fan is equal to the damper's ventilation resistance compared to the system that adjusts the chamber pressure in the target chamber to the set chamber pressure by adjusting the air supply amount to the target chamber with the damper. Although it is advantageous in terms of energy saving, the adjustment of the chamber pressure to the increase side to prevent the chamber pressure from becoming excessive is always performed only by increasing the output of the air supply fan. Depending on the usage conditions, etc., adjusting and maintaining the chamber pressure at the set chamber pressure requires adjusting and maintaining the output of the supply fan to a considerably high output, which increases the power consumption of the supply fan. In addition, in addition to this, an increase in the air supply amount may increase the processing load of the air conditioning process for the intake outdoor air, and there is still room for improvement in achieving further energy saving. There was a problem.

  Moreover, in the above conventional system, adjustment to the lowering side of the chamber pressure to prevent the chamber pressure from becoming excessive is always performed only by reducing the output of the air supply fan. In order to adjust / maintain the air pressure to the set room pressure, it is necessary to adjust / maintain the output of the air supply fan to a considerably low output, which greatly reduces the ventilation of the target room. There is still a problem that there is still room for improvement in maintaining good performance.

  Note that these problems are caused by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor (approximately) in order to adjust and maintain the chamber pressure of the target chamber at the set chamber pressure with respect to various chamber pressure change factors. In other words, even if the chamber pressure in the target chamber is adjusted to the set chamber pressure only by adjusting the exhaust volume from the target chamber with the exhaust fan), there is only a difference between the supply fan side and the exhaust fan side. It happens in the same way.

In view of this situation, the main object of the present invention is to effectively solve the above-described problems by adjusting the chamber pressure of the target chamber in a rational control mode.
The

A first characteristic configuration of the present invention relates to a room pressure control system,
An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured to adjust the output of the exhaust fan in a state where the output of the exhaust fan is fixed to a set fixed output for the exhaust fan, or to maintain the total exhaust amount from the target chamber at a set total exhaust amount. While adjusting, an air supply fan main body adjustment operation in a basic mode is performed in which the output pressure of the supply air fan is adjusted based on the detection chamber pressure by the chamber pressure sensor to adjust the chamber pressure of the target chamber to the set chamber pressure. With
If the output of the air supply fan rises above the set upper limit output for the air supply fan under the execution of the air supply fan main adjustment operation in this basic mode, the output of the air supply fan becomes the set upper limit output for the air supply fan. Operates in an exhaust fan main adjustment operation in the supply side upper limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in a fixed state The point is that it is configured to switch automatically.

  In other words, according to this configuration, when the output of the supply fan rises above the set upper limit output for the supply fan under the execution of the supply fan main adjustment operation in the basic mode, the exhaust fan main adjustment operation in the supply side upper limit mode In the exhaust fan main adjustment operation in the air supply side upper limit mode after the switchover, the chamber pressure becomes too low with the supply fan output fixed at the set upper limit output for the air supply fan. Since the adjustment to the increase side of the chamber pressure is performed by reducing the output of the exhaust fan, the adjustment to the increase side of the chamber pressure to prevent the chamber pressure from being excessively reduced as in the conventional system described above. Compared with always increasing the supply fan output alone, the fan power consumption of the entire system is reduced by the combined amount of the increase limit due to the fixed supply fan output and the decrease in the exhaust fan output. Thing can also increase limit amount of the supply amount, there also such can reduce the processing load of the air conditioning process for intake chamber outside air, it is possible to achieve energy saving more effectively.

  Also, adjust the output of the air supply fan while adjusting the output of the exhaust fan so that the exhaust fan output is fixed to the set fixed output, or while adjusting the exhaust fan output so that the total exhaust amount from the target room is maintained at the set total exhaust amount. Since the basic air supply fan adjustment operation in the basic mode that adjusts the chamber pressure of the target room to the set room pressure is the basic operation, on the contrary, the output adjustment of the exhaust fan with the output of the air supply fan fixed Compared with the basic operation of exhaust fan main adjustment operation that adjusts the chamber pressure of the target room to the set room pressure by using this method, it is more suitable when the target room is kept at a positive pressure than the outside to maintain indoor cleanliness. A suitable room pressure control system can be obtained.

The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
When the control means performs the exhaust fan main body adjustment operation in the supply side upper limit mode, the output of the exhaust fan decreases below the lower limit side set threshold output for the exhaust fan, which is lower than the set fixed output for the exhaust fan. The chamber pressure of the target chamber is set by adjusting the output of the air supply fan based on the detected chamber pressure by the chamber pressure sensor in a state where the output of the exhaust fan is fixed to the lower limit side set threshold output for the exhaust fan. The configuration is such that the operation is automatically switched to the supply fan main body adjustment operation in the upper limit mode for adjusting to the chamber pressure.

  In other words, according to this configuration, the exhaust fan output falls below the lower limit set threshold output for the exhaust fan, which is lower than the set fixed output for the exhaust fan, during execution of the exhaust fan main adjustment operation in the supply side upper limit mode. Then, with the output of the exhaust fan fixed to the lower limit set threshold output for the exhaust fan, the supply fan output is adjusted based on the detected room pressure by the room pressure sensor to adjust the room pressure of the target room to the set room pressure The operation is switched to the air supply fan main adjustment operation in the upper limit mode, i.e., basically by adjusting the output of the air supply fan with the exhaust fan output fixed in the same manner as the air supply fan main adjustment operation in the basic mode. Since the operation returns to the operation of adjusting the chamber pressure of the target chamber to the set chamber pressure, the response range for the chamber pressure fluctuation is reduced compared to the case of dealing with the chamber pressure fluctuation only by adjusting the output of the supply fan as in the conventional system described above. Wide it can be secured.

A third characteristic configuration of the present invention relates to a room pressure control system,
An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured to adjust the output of the exhaust fan in a state where the output of the exhaust fan is fixed to a set fixed output for the exhaust fan, or to maintain the total exhaust amount from the target chamber at a set total exhaust amount. While adjusting, an air supply fan main body adjustment operation in a basic mode is performed in which the output pressure of the supply air fan is adjusted based on the detection chamber pressure by the chamber pressure sensor to adjust the chamber pressure of the target chamber to the set chamber pressure. With
If the output of the air supply fan falls below the lower limit setting for the air supply fan during the air supply fan main adjustment operation in this basic mode, the output of the air supply fan becomes the setting lower limit output for the air supply fan. Operates in an exhaust fan main adjustment operation in the supply side lower limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in a fixed state The point is that it is configured to switch automatically.

  In other words, according to this configuration, if the output of the supply fan falls below the set lower limit output for the supply fan under the execution of the supply fan main adjustment operation in the basic mode, the exhaust fan main adjustment operation in the supply side lower limit mode In the exhaust fan main adjustment operation in the air supply side lower limit mode after the changeover, the chamber pressure becomes excessive with the output of the air supply fan fixed to the setting lower limit output for the air supply fan. Since the adjustment to the decrease side of the chamber pressure is performed by increasing the output of the exhaust fan, the adjustment to the decrease side of the chamber pressure to prevent the chamber pressure from becoming excessive as in the conventional system described above. Compared with always reducing the supply fan output only, the reduction of the ventilation of the target room can be suppressed by limiting the reduction by fixing the supply fan output and increasing the output of the exhaust fan. It can keep a better.

  As in the first feature configuration, while adjusting the output of the exhaust fan so that the exhaust fan output is fixed to the set fixed output or the total exhaust amount from the target chamber is maintained at the set total exhaust amount. Since the basic operation is the air supply fan main adjustment operation in the basic mode that adjusts the chamber pressure of the target room to the set room pressure by adjusting the output of the air supply fan, the output of the air supply fan is fixed contrary to this Compared to the basic operation with exhaust fan main adjustment operation that adjusts the chamber pressure of the target room to the set room pressure by adjusting the output of the exhaust fan in the state, the target room is placed outside the room to maintain indoor cleanliness etc. When the positive pressure is maintained, a more suitable room pressure control system can be obtained.

The fourth feature configuration of the present invention specifies an embodiment suitable for the implementation of the third feature configuration.
The control means, when the exhaust fan main adjustment operation in the supply side lower limit mode is performed, when the output of the exhaust fan rises above the upper limit set threshold output for the exhaust fan that is higher than the set fixed output for the exhaust fan The chamber pressure of the target chamber is set by adjusting the output of the air supply fan based on the detection chamber pressure detected by the chamber pressure sensor in a state where the output of the exhaust fan is fixed to the upper limit side set threshold output for the exhaust fan. The configuration is such that the operation is automatically switched to the supply fan main body adjustment operation in the lower limit side mode for adjusting to the room pressure.

  In other words, according to this configuration, the exhaust fan output is higher than the upper limit set threshold output for the exhaust fan, which is higher than the set fixed output for the exhaust fan, during execution of the exhaust fan main adjustment operation in the supply side lower limit mode. Then, with the output of the exhaust fan fixed to the upper limit set threshold output for the exhaust fan, the supply fan output is adjusted based on the detected room pressure by the room pressure sensor to adjust the room pressure of the target room to the set room pressure The operation is switched to the air supply fan main adjustment operation in the lower limit mode, that is, basically, by adjusting the output of the air supply fan with the output of the exhaust fan fixed in the same manner as the air supply fan main adjustment operation in the basic mode. Since the operation returns to the operation of adjusting the chamber pressure of the target chamber to the set chamber pressure, the response range for the chamber pressure fluctuation is reduced compared to the case of dealing with the chamber pressure fluctuation only by adjusting the output of the supply fan as in the conventional system described above. Wide it can be secured.

  In the implementation of the present invention, it is preferable to combine the first feature configuration and the third feature configuration. In that case, it is more preferable to combine the second feature configuration and the fourth feature configuration.

The fifth characteristic configuration of the present invention specifies an embodiment suitable for implementation of any of the first to fourth characteristic configurations,
The control means adjusts the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the supply fan based on the detected chamber pressure by the chamber pressure sensor in the supply fan main body adjustment operation. A pressure in the air supply path connecting the air supply fan to the target chamber is detected by a road pressure sensor, and an output of the air supply fan is adjusted according to the detected pressure in the road so that the pressure in the air supply path is adjusted. In parallel with this, when the detected chamber pressure by the chamber pressure sensor rises above the set chamber pressure, the set channel pressure of the supply channel is decreased. Configuration for changing to a lowering side, and executing a supply-side pressure change control on the air supply side that changes the set passage internal pressure of the air supply passage to the higher side when the detection chamber pressure by the chamber pressure sensor is lower than a set chamber pressure It is in a certain point.

  That is, according to this configuration, in the air supply fan main body adjustment operation, indirect air supply via the supply side road pressure adjustment control and the road pressure change control with respect to the change in the detected room pressure by the room pressure sensor. Since the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the fan output, the air supply is directly performed according to the detected chamber pressure by the chamber pressure sensor without going through the in-road pressure adjustment control and in-road pressure change control on the supply side. Compared with the method that adjusts the fan output to adjust the chamber pressure to the set room pressure, fluctuations in the chamber pressure caused by the output change of the supply fan itself can be suppressed. The stability of the chamber pressure control in can be effectively increased.

  Further, as an execution form of the supply side road pressure change control, when the state in which the detection chamber pressure detected by the chamber pressure sensor deviates from the allowable range of the set chamber pressure to the increase side or the decrease side has continued beyond the set allowable time, By adopting an execution form such as gradually changing the set internal pressure of the air supply path to the lower side or the upper side by a predetermined width at a predetermined change rate, the stability of the room pressure control during the supply fan main body adjustment operation is improved. It can be increased more effectively.

The sixth feature configuration of the present invention specifies an embodiment suitable for the implementation of the fifth feature configuration.
The control means is configured to continue the supply-side road pressure change control while the supply-side road pressure adjustment control is stopped when the exhaust fan main body adjustment operation is executed.

  That is, according to this configuration, even in the exhaust fan main body adjustment operation in which the supply-side-side road pressure adjustment control is stopped, the supply air that changes the set-up road pressure in the supply air path according to the detected room pressure by the room pressure sensor. Side road pressure change control continues, so when switching the operation from the exhaust fan main adjustment operation to the supply air fan main adjustment operation and restarting the air supply side road pressure adjustment control, the room pressure at the time of restart is changed. On the other hand, it is possible to restart the supply-side road pressure adjustment control in the state of the set-up road pressure appropriately corresponding to this, and thereby it is possible to more effectively enhance the stability of the room pressure control during the main operation of the supply air fan. .

  In the fifth and sixth characteristic configurations, the chamber pressure of the target chamber is set by adjusting the output of the supply air fan by the supply side road pressure adjustment control and the road pressure change control in the supply fan main body adjustment operation. Similarly to this, when implementing any of the first to fourth characteristic configurations, the exhaust fan output is adjusted by the exhaust-side pressure adjustment control and the road pressure change control in the exhaust fan main adjustment operation. By doing so, the chamber pressure of the target chamber may be adjusted to the set chamber pressure.

  That is, in this case, the control means adjusts the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in the exhaust fan main adjustment operation. In addition, the internal pressure of the exhaust passage connecting the exhaust fan to the target chamber is detected by an internal pressure sensor, and the internal pressure of the exhaust passage is adjusted by adjusting the output of the exhaust fan according to the detected internal pressure. In addition to executing the exhaust-side pressure adjustment control on the exhaust side to adjust the set-path internal pressure, when the detected chamber pressure by the chamber pressure sensor rises above the set chamber pressure, the set-path internal pressure of the exhaust passage is lowered. In addition, when the detection chamber pressure by the chamber pressure sensor is lower than the set chamber pressure, the exhaust side road pressure change control is executed to change the set passage internal pressure of the exhaust passage to the rising side.

  Further, the control means is configured to continue the exhaust-side road pressure change control in a state where the exhaust-side road pressure adjustment control is stopped when the air supply fan main body adjustment operation is executed.

A seventh characteristic configuration of the present invention relates to an actual pressure control system,
An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured so that the supply fan output is fixed to a fixed fixed output for the supply fan, or the total supply amount to the target chamber is maintained at the set total supply amount. Adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor while adjusting the output of the air fan, thereby adjusting the chamber pressure of the target chamber to the set chamber pressure. And run
If the output of the exhaust fan rises above the set upper limit output for the exhaust fan under execution of the exhaust fan main adjustment operation in the basic mode, the output of the exhaust fan is fixed to the set upper limit output for the exhaust fan. Automatically adjusts the air supply fan main adjustment operation in the exhaust side upper limit mode to adjust the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the air supply fan based on the detected chamber pressure by the chamber pressure sensor The point is that it is configured to be switched.

  In other words, according to this configuration, when the exhaust fan output increases above the set upper limit output for the exhaust fan under the execution of the exhaust fan main adjustment operation in the basic mode, the operation is performed in the supply air fan main adjustment operation in the exhaust upper limit mode. In the air supply fan main adjustment operation in the exhaust side upper limit mode after switching, the chamber to prevent the chamber pressure from becoming excessive with the output of the exhaust fan fixed to the set upper limit output for the exhaust fan Since the adjustment to the pressure lowering side is performed by reducing the output of the air supply fan, the output of the exhaust fan is always adjusted to the chamber pressure lowering side to prevent the chamber pressure from becoming excessive as described above. Compared with the increase only, the fan power consumption of the entire system can be reduced by combining the increase limit due to the fixed exhaust fan output and the decrease in the supply fan output. Te, also, decrease amount of the supply amount, there also such can reduce the processing load of the air conditioning process for intake chamber outside air, it is possible to achieve energy saving more effectively.

  In addition, while the output of the supply fan is fixed to the set fixed output, or while adjusting the output of the supply fan so as to maintain the total supply amount from the target room at the set total supply amount, the exhaust fan Since the basic operation is the exhaust fan main adjustment operation in the basic mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the air supply, conversely, the output of the air supply fan is fixed with the exhaust fan output fixed. Compared to the basic operation, which is based on an air supply fan main adjustment operation that adjusts the room pressure of the target room to the set room pressure by adjusting the output, the target room is hidden from the outside in order to prevent leakage of pollutants outside the room. When the pressure is maintained, a more suitable room pressure control system can be obtained.

The eighth feature configuration of the present invention specifies an embodiment suitable for the implementation of the seventh feature configuration.
The control means, under execution of the supply fan main body adjustment operation in the exhaust side upper limit mode, is lower than the lower limit side set threshold output for the supply fan whose output of the supply fan is lower than the set fixed output for the supply fan The output of the air supply fan is adjusted to the lower limit side set threshold output for the air supply fan, and the output of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor. The configuration is such that the operation is automatically switched to the exhaust fan main adjustment operation in the upper limit side mode for adjusting the chamber pressure to the set chamber pressure.

  That is, according to this configuration, the lower limit set threshold output for the supply fan is lower than the fixed fixed output for the supply fan when the supply fan main body adjustment operation in the exhaust upper limit mode is executed. When the pressure drops below, the output pressure of the supply fan is fixed to the lower limit setting threshold output for the supply fan, and the output pressure of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor to set the room pressure of the target room. Since the operation is switched to the exhaust fan main adjustment operation in the upper limit mode that adjusts to the room pressure, that is, basically the output of the exhaust fan with the output of the supply fan fixed as in the exhaust fan main adjustment operation in the basic mode Since the adjustment returns to the operation of adjusting the chamber pressure of the target chamber to the set chamber pressure, as described above, a wider range of response to the chamber pressure fluctuation is secured compared to the case of dealing with the chamber pressure fluctuation only by adjusting the output of the exhaust fan. Door can be.

The ninth characteristic configuration of the present invention relates to a room pressure control system,
An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured so that the supply fan output is fixed to a fixed fixed output for the supply fan, or the total supply amount to the target chamber is maintained at the set total supply amount. Adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor while adjusting the output of the air fan, thereby adjusting the chamber pressure of the target chamber to the set chamber pressure. And run
If the exhaust fan output falls below the set lower limit output for the exhaust fan during execution of the exhaust fan main adjustment operation in the basic mode, the output of the exhaust fan is fixed to the set lower limit output for the exhaust fan. The operation is automatically performed in the air supply fan main adjustment operation in the exhaust side lower limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the supply fan based on the detection chamber pressure by the chamber pressure sensor. Configure to switch ,
Further, the control means is configured to perform a supply fan main adjustment operation in the exhaust side lower limit mode so that the output of the supply fan is higher than the set fixed output for the supply fan. When the output rises above the output, the output of the air supply fan is fixed to the upper limit side set threshold output for the air supply fan, and the output of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor. The configuration is such that the operation is automatically switched to the exhaust fan main adjustment operation in the lower limit side mode for adjusting the chamber pressure to the set chamber pressure .

  In other words, according to this configuration, when the exhaust fan output decreases below the set lower limit output for the exhaust fan under the execution of the exhaust fan main adjustment operation in the basic mode, the operation is performed in the supply fan main adjustment operation in the exhaust side lower limit mode. In the air supply fan main adjustment operation in the exhaust lower limit mode after switching, the chamber pressure to prevent the chamber pressure from becoming too low with the exhaust fan output fixed at the set lower limit output for the exhaust fan Since the adjustment to the rising side is performed by increasing the output of the air supply fan, the exhaust fan is always adjusted to the rising side of the chamber pressure to prevent the chamber pressure from becoming too low as in the conventional system described above. Compared with only lowering the output of the engine, the lowering of the ventilation of the target room can be suppressed by limiting the reduction by fixing the exhaust fan output and increasing the output of the air supply fan. It can be maintained more satisfactorily.

  Further, as in the seventh feature configuration, the output of the air supply fan is maintained in a state where the output of the air supply fan is fixed to the set fixed output, or the total air supply from the target room is maintained at the set total air supply. The exhaust fan main adjustment operation in the basic mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the exhaust fan output while adjusting the exhaust fan is the basic operation, so conversely, the output of the exhaust fan is fixed In order to prevent the leakage of pollutants to the outside compared to the basic operation with the air supply fan main adjustment operation that adjusts the room pressure of the target room to the set room pressure by adjusting the output of the air supply fan When the target chamber is kept at a negative pressure rather than outside, a more suitable room pressure control system can be provided.

And according to this structure, the following effect can also be obtained.

  That is, according to this configuration, the upper limit set threshold output for the supply fan is higher than the set fixed output for the supply fan when the supply fan main body adjustment operation in the exhaust side lower limit mode is performed. When the pressure rises above, the output pressure of the supply fan is fixed to the upper limit setting threshold output for the supply fan, and the output of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor to set the room pressure of the target room. Since the operation is switched to the exhaust fan main adjustment operation in the lower limit mode that adjusts to the chamber pressure, that is, basically the output of the exhaust fan with the output of the supply fan fixed as in the exhaust fan main adjustment operation in the basic mode Since the adjustment returns to the operation of adjusting the chamber pressure of the target chamber to the set chamber pressure, as described above, a wider range of response to the chamber pressure fluctuation is secured compared to the case of dealing with the chamber pressure fluctuation only by adjusting the output of the exhaust fan. Door can be.

In the implementation of the present invention, it is preferable to combine the seventh feature configuration and the ninth feature configuration, and in that case, it is more preferable to combine the eighth feature configuration and the ninth feature configuration.

The tenth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the seventh to ninth characteristic configurations,
The control means adjusts the chamber pressure of the target chamber to a set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in the exhaust fan main adjustment operation. The internal pressure of the exhaust passage connected to the target chamber is detected by a road internal pressure sensor, and the output of the exhaust fan is adjusted according to the detected internal pressure of the exhaust passage to adjust the internal pressure of the exhaust passage to the set internal pressure. In addition to executing the exhaust-side pressure adjustment control on the exhaust side, when the detection chamber pressure by the chamber pressure sensor rises higher than the set chamber pressure, the set passage internal pressure of the exhaust passage is changed to the lower side, and When the detection chamber pressure by the chamber pressure sensor is lower than the set chamber pressure, the exhaust side road pressure change control is executed to change the set internal pressure of the exhaust passage to the rising side.

  In other words, according to this configuration, in the exhaust fan main adjustment operation, indirect exhaust fan output via the exhaust side road pressure adjustment control and the road pressure change control with respect to the change in the detected chamber pressure by the chamber pressure sensor. By adjusting the chamber pressure of the target chamber to the set chamber pressure, the output of the exhaust fan is directly adjusted according to the detected chamber pressure by the chamber pressure sensor, without going through the exhaust side road pressure adjustment control and the road pressure change control. Compared to the method of adjusting the chamber pressure of the target chamber to the set chamber pressure, the stability of the chamber pressure control during the exhaust fan main adjustment operation can be suppressed, such as the fluctuation of the chamber pressure caused by the output change of the exhaust fan itself can be suppressed. Can be effectively increased.

  Further, as an execution form of the road pressure change control on the exhaust side, when the state in which the detected chamber pressure by the chamber pressure sensor deviates from the allowable range of the set room pressure to the increase side or the decrease side continues for the set allowable time, By adopting an execution form such as gradually changing the set internal pressure of the road to a lower side or a higher side by a predetermined width at a predetermined change speed, the stability of the chamber pressure control during the exhaust fan main adjustment operation is more effective. Can be increased.

The eleventh feature configuration of the present invention specifies an embodiment suitable for the implementation of the tenth feature configuration.
The control means is configured to continue the exhaust-side road pressure change control while the exhaust-side road pressure adjustment control is stopped when the air supply fan main body adjustment operation is executed.

  In other words, according to this configuration, the exhaust side set pressure in the exhaust path is changed according to the detected chamber pressure by the chamber pressure sensor even in the air supply fan main adjustment operation for stopping the exhaust side road pressure adjustment control. Since the road pressure change control continues, the next time the operation is switched from the supply fan main adjustment operation to the exhaust fan main adjustment operation to restart the exhaust side pressure adjustment control, it is appropriate for the room pressure at the time of restart. The exhaust-side pressure adjustment control on the exhaust side can be resumed in the state of the corresponding set road pressure, and thereby the stability of the chamber pressure control during the exhaust fan main operation can be further effectively improved.

In the tenth and eleventh characteristic configurations, the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the exhaust fan by the exhaust side road pressure adjustment control and the road pressure change control in the exhaust fan main adjustment operation. However, in the same manner as this, when implementing any one of the seventh to ninth feature configurations, the output of the supply air fan is adjusted by the supply air side pressure adjustment control and the road pressure change control in the supply air fan main body adjustment operation. By doing so, the chamber pressure of the target chamber may be adjusted to the set chamber pressure.

  That is, in this case, the control means adjusts the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the supply fan based on the detected chamber pressure by the chamber pressure sensor in the supply fan main body adjustment operation. For this purpose, the pressure in the air supply path connecting the air supply fan to the target chamber is detected by a road pressure sensor, and the output of the air supply fan is adjusted according to the detected pressure in the path. The air supply side road pressure adjustment control for adjusting the road internal pressure to the set road internal pressure is executed, and concurrently, when the detection chamber pressure by the chamber pressure sensor rises higher than the set chamber pressure, the air supply path When the detection chamber pressure detected by the chamber pressure sensor decreases below the set chamber pressure, the supply channel pressure change on the supply side is changed to the increase side. Configure to execute control.

  Further, the control means is configured to continue the supply-side road pressure change control while the supply-side road pressure adjustment control is stopped when the exhaust fan main body adjustment operation is executed.

In carrying out the present invention described above, the basic operation mode on the air supply side (preferably the operation mode in which the first to fourth feature configurations are combined), the seventh and the seventh feature configurations, and the first and third feature configurations are combined. The exhaust-side basic operation mode (preferably the operation mode in which the seventh to ninth characteristic configurations are combined and implemented) in which the nine feature configurations are combined can be appropriately switched and implemented by giving a switching command to the control means. As a result, a room pressure control system with even higher functionality and versatility can be obtained.

  Incidentally, in order to reduce fan power consumption and improve the ventilation of the target room, the output of the air supply fan and the output of the exhaust fan are simultaneously and contradictory based on the room pressure detected by the room pressure sensor. Another type of room pressure control system that adjusts the chamber pressure of the target room to the set room pressure by adjusting the air pressure is also conceivable. The fan output adjustment interferes with each other, and the room pressure control tends to become unstable due to the mutual interference.

On the other hand, according to the first to eleventh characteristic configurations of the present invention, the instability of the room pressure control due to such mutual interference is prevented, and the stability of the room pressure control is further ensured. Can do.

[First Embodiment]
FIG. 1 is a block diagram of an air conditioning system to which a room pressure control system of the present invention is applied. 1 is a room pressure adjustment room, 2 is an outside air conditioner for adjusting the temperature and humidity of outside air OA, which is outdoor air, and 3 is an outside An air supply fan as an outside air introduction fan that supplies the adjusted outside air OA adjusted by the conditioner 2 to the target chamber 1 through the air supply path 4, and 5 discharges the room air in the target chamber 1 to the outside through the exhaust path 6 as exhaust EA. It is an exhaust fan.

  In this facility, an air conditioner 7 and a circulation fan 8 are installed in the air supply path 4, and a return air path 9 branched from the exhaust path 6 is connected to the inlet of the air conditioner 7 upstream of the circulation fan 8. It is.

  That is, the adjusted outside air OA supplied from the external air conditioner 2 by the air supply fan 3 and the indoor air as the return air RA guided through the return air passage 9 in the air circulation by the circulation fan 8 are supplied to the air conditioner 7. Then, the mixed air of the adjusted outside air OA and the return air RA is further adjusted in temperature and humidity by the air conditioner 7, and the mixed air OA / RA adjusted in temperature and humidity is supplied to the target chamber 1.

  Reference numeral 10 denotes an individual exhaust fan that discharges the room air in the target room 1 to the outside separately from the exhaust air EA by the exhaust fan 5 through a separate exhaust passage 11 from a specific place in the room as the individual exhaust air EA ′. Individual exhaust by is performed as needed as needed.

  In this air conditioning equipment, the target room is adjusted by the air volume balance between the adjusted outside air OA supplied from the external air conditioner 2 to the target room 1 and the exhaust EA and individual exhaust EA ′ discharged from the target room 1 by the exhaust fan 5 and the individual exhaust fan 10. 1 is determined. For the chamber pressure control for adjusting the chamber pressure p of the target chamber 1 to the set chamber pressure ps, the chamber pressure p of the target chamber 1 (in this example, the indoor / outdoor differential pressure of the target chamber 1 is determined). ) Is provided, and each of the supply air fan 3 and the exhaust fan 5 is a fan whose output is variable by inverter control.

  Then, as a control means, a chamber pressure controller 13 that adjusts the chamber pressure p of the target chamber 1 to the set chamber pressure ps by adjusting the output of the supply fan 3 or the exhaust fan 5 based on the detected chamber pressure p by the chamber pressure sensor 12. Specifically, the room pressure controller 13 is configured to perform the following control operations (A) to (E) (see FIG. 2).

(A) When a start command for the room pressure control is given, a basic mode air supply fan main adjustment operation ((c) in FIG. 2) is started as a basic operation.
In the air supply fan main adjustment operation in this basic mode, the output fo of the air supply fan 3 is adjusted based on the detected room pressure p by the room pressure sensor 12 with the output fe of the exhaust fan 5 fixed to the set fixed output fes. As a result, the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps.

  In the supply fan main body adjustment operation in the basic mode, instead of fixing the output fe of the exhaust fan 5 to the set fixed output fes, the exhaust amount by the exhaust fan 5 and the individual exhaust amount by the individual exhaust fan 10 are set. While adjusting the output fe of the exhaust fan 5 so that the total exhaust amount Qe from the target chamber 1 which is the sum is maintained at the set total exhaust amount Qes, the air supply fan 3 is controlled based on the detected chamber pressure p by the chamber pressure sensor 12. An operation mode in which the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps by adjusting the output fo may be employed.

(B) When the output fo of the air supply fan 3 rises above the set upper limit output foa for the air supply fan in the situation where the air supply fan main body adjustment operation in the basic mode ((c) in FIG. 2) is performed, The operation is switched to the exhaust fan main body adjustment operation ((b) in FIG. 2) in the supply side upper limit mode.
In the exhaust fan main body adjustment operation in the air supply side upper limit mode, the exhaust fan 3 is fixed based on the detected room pressure p by the room pressure sensor 12 with the output fo of the air supply fan 3 fixed to the set upper limit output foa for the air supply fan. By adjusting the output fe of 5, the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps.

(C) On the other hand, the output fo of the air supply fan 3 falls below the set lower limit output fob for the air supply fan under the condition that the air supply fan main body adjustment operation ((c) of FIG. 2) is performed in the basic mode. Then, the operation is switched to the exhaust fan main body adjustment operation ((d) in FIG. 2) in the supply side lower limit mode.
In the exhaust fan main body adjustment operation in the supply side lower limit mode, the exhaust fan 5 is controlled based on the detected room pressure p by the chamber pressure sensor 12 with the output fo of the supply fan 3 fixed to the set lower limit output fob for the supply fan. The output pressure fe of the target chamber 1 is adjusted to the set chamber pressure ps.

(D) The exhaust fan whose output fe of the exhaust fan 5 is lower than the set fixed output fes for the exhaust fan under the condition where the exhaust fan main body adjustment operation ((b) of FIG. 2) is performed in the supply side upper limit mode. When lower than the lower limit side set threshold output feb, the operation is switched to the supply fan main body adjustment operation ((a) of FIG. 2) in the upper limit side mode.
In the air supply fan main adjustment operation in the upper limit mode, the supply fan is based on the detected room pressure p by the room pressure sensor 12 with the output fe of the exhaust fan 5 fixed to the lower limit side set threshold output feb for the exhaust fan. 3 is adjusted to adjust the chamber pressure p of the target chamber 1 to the set chamber pressure ps.

  Note that the output fe of the exhaust fan 5 is higher than the set fixed output fes for the exhaust fan (or higher than that) under the situation where the exhaust fan main body adjustment operation ((b) in FIG. 2) is performed in the supply side upper limit mode. When the value rises above the upper limit set threshold output for the high exhaust fan, the operation returns to the basic mode of the supply fan main body adjustment operation ((c) of FIG. 2).

  Further, when the output fo of the air supply fan 3 falls below the set upper limit output foa for the air supply fan under the situation where the air supply fan main body adjustment operation in the upper limit side mode ((a) of FIG. 2) is performed, Returning to the exhaust fan main body adjustment operation ((b) of FIG. 2) in the supply side upper limit mode.

(E) An exhaust fan whose output fe of the exhaust fan 5 is higher than the set fixed output fes for the exhaust fan under the condition where the exhaust fan main body adjustment operation ((d) in FIG. 2) is performed in the supply side lower limit mode. When the value rises above the upper limit side set threshold output fea, the operation is switched to the supply fan main body adjustment operation ((e) in FIG. 2) in the lower limit side mode.
In the supply fan main adjustment operation in the lower limit side mode, the supply fan is based on the detected room pressure p by the room pressure sensor 12 with the output fe of the exhaust fan 5 fixed to the upper limit side set threshold output fea for the exhaust fan. 3 is adjusted to adjust the chamber pressure p of the target chamber 1 to the set chamber pressure ps.

  Note that the output fe of the exhaust fan 5 is set to the fixed fixed output fes for the exhaust fan (or higher than that) under the condition where the exhaust fan main body adjustment operation ((d) in FIG. 2) is performed in the supply side lower limit mode. When lower than the lower limit side set threshold output feb) for the low exhaust fan, the operation returns to the air supply fan main body adjustment operation ((c) of FIG. 2) in the basic mode.

  In addition, when the output fo of the air supply fan 3 rises above the set lower limit output fob for the air supply fan under the situation where the air supply fan main body adjustment operation ((e) of FIG. 2) is performed in the lower limit side mode, Returning to the exhaust fan main adjustment operation ((d) of FIG. 2) in the supply side lower limit mode.

  In the above example, the case where the room pressure control system of the present invention is applied to an air conditioner of the type in which a part of the room air is circulated by the circulation fan 8 is shown. An all-outside air conditioning system in which only the adjusted outside air OA by the controller 2 is supplied to the target chamber 1 through the air supply path 4 by the air supply fan 3 may be used.

[Second Embodiment]
In the first embodiment described above, in order to adjust the chamber pressure p of the target chamber 1 to the set chamber pressure ps in each supply fan main body adjustment operation, the output fo of the supply fan 3 is detected by the chamber pressure sensor 12. In the second embodiment, the output fo of the air supply fan 3 is detected by the room pressure sensor 12 in each of the air supply fan main body adjustment operations described above. To adjust based on ps, the output fo of the air supply fan 3 is indirectly adjusted via the supply side road pressure adjustment control and the road pressure change control. With respect to the control and the internal pressure change control, the room pressure controller 13 is configured to perform the following control operations (f) to (h) (see FIG. 3).

  (F) In the air supply fan main adjustment operation ((c), (a), (e) of FIG. 2) in each of the basic mode, the upper limit mode, and the lower limit mode described above, as in-road pressure adjustment control on the supply side The road pressure sensor 14 provided in the air supply path 4 detects the road pressure po (static pressure) of the air supply path 4 and adjusts the output fo of the air supply fan 3 in accordance with the detected path internal pressure po. The internal pressure po of the air passage 4 is adjusted to the set internal pressure pos.

  (G) Also, in these air supply fan main adjustment operations, the detected room pressure p by the room pressure sensor 12 is set from the set room pressure ps as the air supply side road pressure change control accompanying the air supply side road pressure adjustment control. If the pressure rises, the set passage internal pressure pos of the air supply passage 4 is changed to a lower side, and when the detection chamber pressure p detected by the chamber pressure sensor 12 falls below the set chamber pressure ps, the set passage internal pressure pos of the air supply passage 4 increases. Change to the side.

  Specifically, when the state where the detection chamber pressure p detected by the chamber pressure sensor 12 deviates from the allowable range of the set chamber pressure ps to the increase side or the decrease side continues beyond the set allowable time ts, the setting of the air supply path 4 is performed. The road pressure pos is gradually changed to a lower side or a higher side by a predetermined width at a predetermined change rate.

  (H) Further, in the exhaust fan main body adjustment operation ((b) and (d) of FIG. 2) in the above-described supply-side upper limit mode and supply-side lower limit mode, the supply-side road pressure adjustment control is stopped. The air supply side road pressure change control continues, so that the room when the operation is switched from the exhaust fan main body adjustment operation to the air supply fan main body adjustment operation and the air supply side road pressure adjustment control is resumed. Increase the stability of pressure control.

  As shown in FIG. 2, the basic mode of the supply fan main body adjustment operation is a basic operation, and the operation is switched according to the outputs fo and fe of the supply fan 3 and the exhaust fan 5 at each time point, and the supply side upper limit. The point that the output fe of the exhaust fan 5 is directly adjusted according to the detection chamber pressure p by the chamber pressure sensor 12 in the exhaust fan main body adjustment operation in each of the mode and the supply side lower limit mode is the same as that in the first embodiment.

  In the above example, the case where the air supply side road pressure adjustment control and the road pressure change control are adopted in the air supply fan main adjustment operation is shown. Similarly, in each exhaust fan main adjustment operation, the room pressure sensor 12 is used. In order to adjust the output fe of the exhaust fan 5 based on the detection chamber pressure p by the above, the exhaust side road pressure adjustment control and the road pressure change control may be adopted.

  That is, in the exhaust fan main body adjustment operation ((b) and (d) in FIG. 2) in each of the supply side upper limit mode and the supply side lower limit mode, as the exhaust side road pressure adjustment control (see FIG. 4), the exhaust path 6 detects the internal pressure pe (static pressure) of the exhaust passage 6 and adjusts the output fe of the exhaust fan 5 in accordance with the detected internal pressure pe, thereby adjusting the internal pressure pe of the exhaust passage 6. Is adjusted to the set road pressure pes.

  As the exhaust side road pressure adjustment control, as the exhaust side road pressure change control, when the detected chamber pressure p by the chamber pressure sensor 12 rises higher than the set chamber pressure ps, the set road pressure pes of the exhaust path 6 decreases. If the detection chamber pressure p detected by the chamber pressure sensor 12 is lower than the set chamber pressure ps, the set passage internal pressure pes of the exhaust passage 6 is changed to the rise side.

  In this case, in each air supply fan main adjustment operation, the exhaust-side road pressure adjustment control is stopped, but the exhaust-side road pressure change control may be continued.

  The above-described room pressure control system adopting the supply-side and exhaust-side road pressure adjustment control and the road pressure change control is not limited to the all-outside air conditioning system shown in FIG. 3, but a partial circulation system as shown in FIG. It can also be applied to air conditioning equipment.

[Third Embodiment]
In the first and second embodiments described above, an example in which the basic mode of the supply fan main body adjustment operation is shown as the basic operation. In this third embodiment, an example in which the exhaust fan main body adjustment operation is used as the basic operation. Show.

  That is, the above-described room pressure controller 13 as the control means is configured to execute the following control operations (A ′) to (E ′) (see FIG. 5).

(A ′) When a start command for the room pressure control is given, the basic mode exhaust fan main adjustment operation ((c) in FIG. 5) is started.
In the exhaust fan main adjustment operation in this basic mode, the output fe of the exhaust fan 5 is adjusted based on the detected chamber pressure p by the chamber pressure sensor 12 with the output fo of the air supply fan 3 fixed to the set fixed output fos. Thus, the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps.

  In addition, as shown by a broken line in FIG. 3, when there is an individual air supply fan 17 for supplying external air through the individual air supply path 16 to a specific portion of the target chamber 1 as an individual air supply OA 'when necessary, this basic mode is used. In the exhaust fan main adjustment operation, instead of fixing the output fo of the air supply fan 3 to the set fixed output fos, the sum of the air supply amount by the air supply fan 3 and the individual air supply amount by the individual air supply fan 17 is used. While adjusting the output fo of the air supply fan 3 so as to maintain the total air supply amount Qo to a certain target chamber at the set total exhaust amount Qos, the output fe of the exhaust fan 5 based on the detected chamber pressure p by the chamber pressure sensor 12. It is also possible to adopt an operation mode in which the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps by adjusting.

(B ') When the output fe of the exhaust fan 5 rises above the set upper limit output fea for the exhaust fan under the condition where the exhaust fan main body adjustment operation in the basic mode ((c) in FIG. 5) is performed, the exhaust side The operation is switched to the supply fan main body adjustment operation (FIG. 5B) in the upper limit mode.
In the air supply fan main adjustment operation in the exhaust side upper limit mode, the air supply fan 3 is adjusted based on the detected room pressure p by the room pressure sensor 12 with the output fe of the exhaust fan 5 fixed to the set upper limit output fea for the exhaust fan. Is adjusted to the set chamber pressure ps.

(C ') On the other hand, if the output fe of the exhaust fan 5 falls below the set lower limit output feb for the exhaust fan under the situation where the exhaust fan main body adjustment operation in the basic mode ((c) in FIG. 5) is performed, The operation is switched to the supply fan main body adjustment operation ((d) in FIG. 5) in the exhaust side lower limit mode.
In the air supply fan main adjustment operation in the exhaust side lower limit mode, the output fan 5 is fixed to the set lower limit output feb for the exhaust fan while the output fe of the air supply fan 3 is adjusted based on the detected chamber pressure p. The chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps by adjusting the output fo.

(D ') The output fo of the air supply fan 3 is higher than the set fixed output fos for the air supply fan in the situation where the air supply fan main body adjustment operation ((b) of FIG. 5) is performed in the exhaust side upper limit mode. When it falls below the lower limit side set threshold output fob for the low supply fan, the operation is switched to the exhaust fan main body adjustment operation ((a) in FIG. 5) in the upper limit mode.
In the exhaust fan main adjustment operation in the upper limit side mode, the exhaust fan 3 is fixed based on the detected room pressure p by the chamber pressure sensor 12 while the output fo of the supply fan 3 is fixed to the lower limit side set threshold output fob for the supply fan. By adjusting the output fe of 5, the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps.

  It should be noted that the output fo of the supply fan 3 is the fixed fixed output fos for the supply fan (or the same) under the situation where the supply fan main body adjustment operation ((b) of FIG. 5) in the exhaust side upper limit mode is performed. Higher than the upper limit set threshold output foa) for the air supply fan, the exhaust fan main body adjustment operation ((c) of FIG. 5) in the basic mode is restored.

  Further, when the output fe of the exhaust fan 5 falls below the set upper limit output fea for the exhaust fan under the situation where the exhaust fan main body adjustment operation in the upper limit side mode ((a) in FIG. 5) is performed, the exhaust side upper limit Returning to the mode air supply fan main adjustment operation ((b) of FIG. 5).

(E) The output fo of the air supply fan 3 is higher than the set fixed output fos for the air supply fan in a situation where the air supply fan main body adjustment operation in the exhaust side lower limit mode ((d) of FIG. 5) is performed. When it rises above the upper limit set threshold output foa for the supply fan, the operation is switched to the exhaust fan main adjustment operation ((e) of FIG. 5) in the lower limit mode.
In the exhaust fan main adjustment operation in the lower limit mode, the exhaust fan 3 is fixed based on the detected room pressure p by the chamber pressure sensor 12 with the output fo of the supply fan 3 fixed to the upper limit set threshold output foa for the supply fan. By adjusting the output fe of 5, the chamber pressure p of the target chamber 1 is adjusted to the set chamber pressure ps.

  It should be noted that the output fo of the supply fan 3 is the fixed fixed output fos for the supply fan (or the same) under the situation where the supply fan main body adjustment operation ((d) in FIG. 5) is performed in the exhaust side lower limit mode. Lower than the lower limit set threshold output fob) for the supply fan lower than that, the operation returns to the exhaust fan main body adjustment operation ((c) of FIG. 5) in the basic mode.

  Further, if the output fe of the exhaust fan 5 rises above the set lower limit output feb for the exhaust fan under the situation where the exhaust fan main body adjustment operation in the lower limit side mode ((e) of FIG. 5) is performed, the exhaust side lower limit Returning to the mode air supply fan main adjustment operation ((d) of FIG. 5).

  In the third embodiment, the output fe of the exhaust fan 5 is adjusted based on the detected chamber pressure ps by the chamber pressure sensor 12 in each exhaust fan main adjustment operation. Adjustment is performed indirectly through adjustment control and road pressure change control. With respect to this exhaust side road pressure adjustment control and road pressure change control, the room pressure controller 13 is controlled by the following (f ') to (h). The control operation of ') is performed (see FIG. 4).

  (F ') In the exhaust fan main adjustment operation ((c), (a), (e) in FIG. 5) in the basic mode, the upper limit mode, and the lower limit mode described above, The internal pressure pe (static pressure) of the exhaust passage 6 is detected by the internal pressure sensor 15 provided in the exhaust passage 6, and the output fe of the exhaust fan 5 is adjusted according to the detected internal pressure pe. The internal pressure pe is adjusted to the set path internal pressure pes.

  (G) In these exhaust fan main adjustment operations, the detection chamber pressure p detected by the chamber pressure sensor 12 is higher than the set chamber pressure ps as the exhaust-side pressure adjustment control along with the exhaust-side pressure adjustment control. Then, the set path internal pressure pes of the exhaust path 6 is changed to the lower side, and when the detection chamber pressure p by the chamber pressure sensor 12 is lower than the set chamber pressure ps, the set path internal pressure pes of the exhaust path 6 is changed to the higher side. .

  Specifically, when the state in which the detection chamber pressure p detected by the chamber pressure sensor 12 deviates from the allowable range of the set chamber pressure ps to the increase side or the decrease side continues beyond the set allowable time ts, the set channel of the exhaust channel 6 The internal pressure pes is gradually changed to a lowering side or a rising side by a predetermined width at a predetermined changing speed.

  (H ') Further, in the exhaust-side upper limit mode and the exhaust-side lower limit mode, the exhaust-side pressure adjustment control on the exhaust side is stopped in the supply fan main body adjustment operation ((b) and (d) in FIG. 5). Therefore, the stability of the room pressure control when the operation is switched from the supply air fan main adjustment operation to the exhaust fan main adjustment operation and the exhaust side road pressure adjustment control is resumed. To increase.

  In this example, in the operation mode (refer to FIG. 5) in which the exhaust fan main body adjustment operation in the basic mode is a basic operation, the exhaust side road pressure adjustment control and the road pressure change control are employed in each exhaust fan main body adjustment operation. Similarly, in the operation mode in which the exhaust fan main body adjustment operation in the basic mode is the basic operation, the air supply fan is based on the detected room pressure p by the room pressure sensor 12 in each air supply fan main body adjustment operation. In order to adjust the output fo 3, the above-described supply-side road pressure adjustment control and road pressure change control may be employed.

  In the operation mode in which the exhaust fan main adjustment operation in the basic mode is a basic operation, the output fe of the exhaust fan 5 and the output fo of the supply fan 3 in each exhaust fan main adjustment operation and each supply fan main adjustment operation. Is adjusted based on the detection chamber pressure p detected by the chamber pressure sensor 12, as in the first embodiment, the output fe of the exhaust fan 5 and the output fo of the air supply fan 3 according to the detection chamber pressure p detected by the chamber pressure sensor 12. A direct adjustment method may be employed.

  The operation mode (see FIG. 5) for performing the basic operation of the exhaust fan main adjustment operation in the basic mode is various types such as a partial circulation type air conditioner as shown in FIG. 1 and an all outside air type air conditioner as shown in FIG. It can be applied to other facilities.

  As described above, the first and second embodiments show the basic air supply side operation mode (FIG. 2) based on the basic mode air supply fan main body adjustment operation, and the third embodiment shows the basic mode exhaust fan main body adjustment. The exhaust side basic operation mode (FIG. 5) is shown as the basic operation, but the air supply side basic operation mode (FIG. 2) and the exhaust side basic operation mode (FIG. 5) are shown in the room pressure controller. It may be possible to carry out the operation by appropriately switching according to the use of the target room 1 or the use conditions of the target room 1 by giving a switching command to 13 or the like.

  In the embodiment of the present invention, the outdoor air OA supplied to the target room 1 is not limited to the outside air, and may be indoor air in a room different from the target room 1.

  Set upper limit output foa for the supply fan, lower limit setting fob for the supply fan, and exhaust fan set in the basic supply mode of the supply side (FIG. 2) with the basic adjustment of the supply fan in the basic mode as the basic operation Each of the upper limit setting threshold output fea for exhaust and the lower limit side setting threshold output feb for exhaust fan is set in the exhaust side basic operation mode (FIG. 5) in which the basic operation is the exhaust fan main body adjustment operation. It is not necessary to have the same output value as the upper limit set threshold output foa for the fan, the lower limit set threshold output fob for the supply fan, the set upper limit output fea for the exhaust fan, and the set lower limit output feb for the exhaust fan. As these setting outputs, various output values can be employed together with the setting fixed output fos for the air supply fan, the setting fixed output fes for the exhaust fan, and the like.

  Further, a setting upper limit output foa for the supply fan and a setting lower limit output fob for the supply fan that are set in the basic operation mode of the supply side (FIG. 2) in which the basic operation of the supply fan main adjustment operation in the basic mode is performed. Each of the upper limit setting threshold output fea for the exhaust fan and the lower limit side setting threshold output feb for the exhaust fan can be appropriately changed, and similarly, the exhaust side whose basic operation is the exhaust fan main body adjustment operation in the basic mode. Upper limit set threshold output foa for the supply fan, lower limit set threshold output fob for the supply fan, set upper limit output fea for the exhaust fan, and set lower limit for the exhaust fan set in the basic operation mode (FIG. 5) Each of the output febs may be set and changed as appropriate, thereby further enhancing the adaptability and functionality of the system for the target room for various uses.

  In particular, if the setting upper limit output foa for the air supply fan and the setting lower limit output fob for the air supply fan can be appropriately changed, the air supply fan main adjustment operation in the upper limit mode ((a) in FIG. 2). And the lower limit mode air supply fan main adjustment operation ((e) of FIG. 2), it is possible to appropriately adjust the range in which the room pressure can be adjusted according to the operating conditions and the like. If the output fea and the setting lower limit output feb for the exhaust fan can be appropriately set and changed, the exhaust fan main adjustment operation in the upper limit mode (FIG. 5A) and the exhaust fan main adjustment operation in the lower limit mode ( The range in which the room pressure can be adjusted in (e) of FIG. 5 can be appropriately changed according to operating conditions and the like.

Configuration diagram of air conditioning equipment and room pressure control system showing the first embodiment Explanatory drawing of the driving | operation form which shows 1st Embodiment Configuration diagram of air conditioning equipment and room pressure control system showing second embodiment System configuration diagram when exhaust side road pressure adjustment control and road pressure change control are performed Explanatory drawing of the driving | operation form which shows 3rd Embodiment

1 Target room OA Outdoor air 3 Air supply fan EA Indoor air (exhaust)
5 Exhaust fan 12 Room pressure sensor p Room pressure ps Set room pressure fo Air supply fan output fe Exhaust fan output 13 Control means fo Set upper limit output or upper limit side set threshold output for air supply fan fob Setting for air supply fan Lower limit output or lower limit set threshold output fos Fixed fixed output for supply fan fea Upper limit set threshold output or set upper limit output for exhaust fan feb Lower limit set threshold output or set lower limit output for exhaust fan fes For exhaust fan Set fixed output 14 Road pressure sensor in the air supply path po Road pressure in the air supply path pos Air pressure setting in the road 15 Pressure sensor in the exhaust path pe Pressure in the exhaust path pes Pressure in the road set in the exhaust path

Claims (11)

An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured to adjust the output of the exhaust fan in a state where the output of the exhaust fan is fixed to a set fixed output for the exhaust fan, or to maintain the total exhaust amount from the target chamber at a set total exhaust amount. While adjusting, an air supply fan main body adjustment operation in a basic mode is performed in which the output pressure of the supply air fan is adjusted based on the detection chamber pressure by the chamber pressure sensor to adjust the chamber pressure of the target chamber to the set chamber pressure. With
If the output of the air supply fan rises above the set upper limit output for the air supply fan under the execution of the air supply fan main adjustment operation in this basic mode, the output of the air supply fan becomes the set upper limit output for the air supply fan. Operates in an exhaust fan main adjustment operation in the supply side upper limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in a fixed state A room pressure control system that automatically switches between the two.   When the control means performs the exhaust fan main body adjustment operation in the supply side upper limit mode, the output of the exhaust fan decreases below the lower limit side set threshold output for the exhaust fan, which is lower than the set fixed output for the exhaust fan. The chamber pressure of the target chamber is set by adjusting the output of the air supply fan based on the detected chamber pressure by the chamber pressure sensor in a state where the output of the exhaust fan is fixed to the lower limit side set threshold output for the exhaust fan. The room pressure control system according to claim 1, wherein the operation is automatically switched to an air supply fan main body adjustment operation in an upper limit side mode for adjusting to a room pressure. An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured to adjust the output of the exhaust fan in a state where the output of the exhaust fan is fixed to a set fixed output for the exhaust fan, or to maintain the total exhaust amount from the target chamber at a set total exhaust amount. While adjusting, an air supply fan main body adjustment operation in a basic mode is performed in which the output pressure of the supply air fan is adjusted based on the detection chamber pressure by the chamber pressure sensor to adjust the chamber pressure of the target chamber to the set chamber pressure. With
If the output of the air supply fan falls below the lower limit setting for the air supply fan during the air supply fan main adjustment operation in this basic mode, the output of the air supply fan becomes the setting lower limit output for the air supply fan. Operates in an exhaust fan main adjustment operation in the supply side lower limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in a fixed state A room pressure control system that automatically switches between the two.   The control means, when the exhaust fan main adjustment operation in the supply side lower limit mode is performed, when the output of the exhaust fan rises above the upper limit set threshold output for the exhaust fan that is higher than the set fixed output for the exhaust fan The chamber pressure of the target chamber is set by adjusting the output of the air supply fan based on the detection chamber pressure detected by the chamber pressure sensor in a state where the output of the exhaust fan is fixed to the upper limit side set threshold output for the exhaust fan. 4. The room pressure control system according to claim 3, wherein the operation is automatically switched to an air supply fan main adjustment operation in a lower limit side mode for adjusting to a room pressure.   The control means adjusts the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the supply fan based on the detected chamber pressure by the chamber pressure sensor in the supply fan main body adjustment operation. A pressure in the air supply path connecting the air supply fan to the target chamber is detected by a road pressure sensor, and an output of the air supply fan is adjusted according to the detected pressure in the road so that the pressure in the air supply path is adjusted. In parallel with this, when the detected chamber pressure by the chamber pressure sensor rises above the set chamber pressure, the set channel pressure of the supply channel is decreased. Configuration for changing to a lowering side, and executing a supply-side pressure change control on the air supply side that changes the set passage internal pressure of the air supply passage to the higher side when the detection chamber pressure by the chamber pressure sensor is lower than a set chamber pressure Any one of claims 1 to 4 Room pressure control system as claimed.   6. The room pressure control system according to claim 5, wherein the control means is configured to continue the supply-side road pressure change control while the supply-side road pressure adjustment control is stopped when the exhaust fan main body adjustment operation is executed. . An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured so that the supply fan output is fixed to a fixed fixed output for the supply fan, or the total supply amount to the target chamber is maintained at the set total supply amount. Adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor while adjusting the output of the air fan, thereby adjusting the chamber pressure of the target chamber to the set chamber pressure. And run
If the output of the exhaust fan rises above the set upper limit output for the exhaust fan under execution of the exhaust fan main adjustment operation in the basic mode, the output of the exhaust fan is fixed to the set upper limit output for the exhaust fan. Automatically adjusts the air supply fan main adjustment operation in the exhaust side upper limit mode to adjust the chamber pressure of the target chamber to the set chamber pressure by adjusting the output of the air supply fan based on the detected chamber pressure by the chamber pressure sensor A room pressure control system configured to switch.   The control means, under execution of the supply fan main body adjustment operation in the exhaust side upper limit mode, is lower than the lower limit side set threshold output for the supply fan whose output of the supply fan is lower than the set fixed output for the supply fan The output of the air supply fan is adjusted to the lower limit side set threshold output for the air supply fan, and the output of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor. The room pressure control system according to claim 7, wherein the operation is automatically switched to an exhaust fan main body adjustment operation in an upper limit side mode for adjusting the room pressure to a set room pressure. An air supply fan for supplying outdoor air to a target room for adjusting the room pressure, an exhaust fan for discharging indoor air in the target room to the outside, and a chamber pressure sensor for detecting the room pressure of the target room,
A chamber pressure control system provided with control means for adjusting an output of the supply fan or the exhaust fan based on a detection chamber pressure by the chamber pressure sensor to adjust a chamber pressure of the target chamber to a set chamber pressure. ,
The control means is configured so that the supply fan output is fixed to a fixed fixed output for the supply fan, or the total supply amount to the target chamber is maintained at the set total supply amount. Adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor while adjusting the output of the air fan, thereby adjusting the chamber pressure of the target chamber to the set chamber pressure. And run
If the exhaust fan output falls below the set lower limit output for the exhaust fan during execution of the exhaust fan main adjustment operation in the basic mode, the output of the exhaust fan is fixed to the set lower limit output for the exhaust fan. The operation is automatically performed in the air supply fan main adjustment operation in the exhaust side lower limit mode in which the chamber pressure of the target chamber is adjusted to the set chamber pressure by adjusting the output of the supply fan based on the detection chamber pressure by the chamber pressure sensor. Configure to switch ,
Further, the control means is configured to perform a supply fan main adjustment operation in the exhaust side lower limit mode so that the output of the supply fan is higher than the set fixed output for the supply fan. When the output rises above the output, the output of the air supply fan is fixed to the upper limit side set threshold output for the air supply fan, and the output of the exhaust fan is adjusted based on the detected room pressure by the room pressure sensor. A chamber pressure control system configured to automatically switch the operation to an exhaust fan main adjustment operation in a lower limit mode for adjusting the chamber pressure to a set chamber pressure . The control means adjusts the chamber pressure of the target chamber to a set chamber pressure by adjusting the output of the exhaust fan based on the detected chamber pressure by the chamber pressure sensor in the exhaust fan main adjustment operation. The internal pressure of the exhaust passage connected to the target chamber is detected by a road internal pressure sensor, and the output of the exhaust fan is adjusted according to the detected internal pressure of the exhaust passage to adjust the internal pressure of the exhaust passage to the set internal pressure. In addition to executing the exhaust-side pressure adjustment control on the exhaust side, when the detection chamber pressure by the chamber pressure sensor rises higher than the set chamber pressure, the set passage internal pressure of the exhaust passage is changed to the lower side, and 10. The exhaust side road pressure change control for changing the set internal pressure of the exhaust passage to the rising side when the detection chamber pressure by the chamber pressure sensor is lower than a set chamber pressure is performed. Or 1 term Room pressure control system as claimed. 11. The room pressure control system according to claim 10, wherein the control means is configured to continue the exhaust-side road pressure change control while the exhaust-side road pressure adjustment control is stopped when the supply fan main body adjustment operation is performed .

Images