JPH11173649A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an adjusting performance for adjusting a ventilation quantity or internal pressure. SOLUTION: Fan control means 9A, 10A, 9B and 10B are provided for adjusting the outputs of fans Fs and Fr connected to main air ducts 2 and 3 go that all the opening degrees a1 to a3 and b1 to b3 of air quantity adjusting dampers Vs and Vr for adjusting a ventilation quantity or internal pressure in branch air ducts 2a and 3a are located within target intermediate opening degree ranges X and Y in which upper and lower limits are both set to an intermediate opening degree value. Target range correcting means 11A and 11B are provided for correcting the target intermediate opening degree ranges X and Y to a large opening degree side when the average values Ha and Hb of the detected opening degrees a1 to a3 and b1 to b3 of the air quantity adjusting dampers Vs and Vr are smaller than set target average values Has and Hbs and correcting the target intermediate opening degree ranges X and Y to a small opening degree side when the average values Ha and Hb of the detected opening degrees a1 to a3 and b1 to b3 are larger than the set target average values Has and Hbs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system, and more particularly, to a main air passage connected to a fan, a plurality of target rooms are connected in parallel via a branch air passage, and an air flow is adjusted for each of the branch air passages. A damper is provided, and based on the detected airflow of each of the branch airways, the opening of the airflow adjustment damper is adjusted so that the airflow of these branch airways becomes the respective set airflow, or the detection chamber pressure of each of the target chambers is adjusted. The damper control means that adjusts the opening of the airflow adjustment damper so that the chamber pressure of the target chamber becomes the respective set chamber pressure based on the airflow adjustment damper, and the opening of the airflow adjustment damper based on the detected opening of each airflow adjustment damper The present invention relates to an air conditioning system provided with fan control means for adjusting the output of the fan so that the upper and lower limit values are all within a target intermediate opening range set to an intermediate opening value.

[0002]

2. Description of the Related Art An air-conditioning system of this type has been proposed in Japanese Patent Laid-Open Publication No. HEI 1-333447 (Japanese Patent Publication No. 8-27043). Although it is possible to change (specifically, change the setting of the upper and lower limit values), the set target intermediate opening range is set regardless of the change in the opening degree of each air volume adjustment damper on the ventilation volume adjustment or the room pressure adjustment. Had been immobilized.

[0003]

By the way, in this type of air conditioning system, the amount of air flowing through the branch air passage is set to each set amount of air, or the room pressure of the target room is set to each set room pressure. As described above, while the opening of the air flow adjusting dampers of the branch air passages is adjusted, the opening of these air flow adjusting dampers (the opening of each damper at the same time) is set to the intermediate opening value for both upper and lower limits. Since the output of the fan connected to the main air passage is adjusted so as to be within the set target intermediate opening degree range, as another form, for example, as seen in Japanese Patent Publication No. 2-13217, When none of the air volume adjusting dampers reaches the opening just one step before the maximum flow path cross-sectional area, the output of the fan is reduced, and one of the air flow adjusting dampers opens the maximum flow path cross-sectional area (ie, fully open). When the fan output rises In other words, among the airflow adjustment dampers, the one with the maximum opening has the lower limit of the opening just before the maximum cross-sectional area of the flow path and the upper limit of the full opening with the opening of the maximum flow cross-sectional area (fully open) as the upper limit of the range. (A type in which the output of the fan is adjusted so as to be within the predetermined opening degree range) basically has the following advantages (a) and (b).

(A) In the above-mentioned alternative type, among the air volume adjustment dampers, those having the maximum opening are fully open (maximum cross-sectional area of the flow passage).
If the fan does not adjust to the output increase side unless it reaches the limit, it is allowed for each of the air volume adjustment dampers to be biased very close to the full opening, so in general, when fully open, the rate of change in the air volume with respect to the opening degree decreases. The adjustment sensitivity of the air volume adjustment and the pressure adjustment is reduced, while the rate of change of the air volume with respect to the change in the opening degree is increased in the fully closed state, and the stability of the air volume adjustment and the pressure adjustment is reduced. In particular, the operation of adjusting the air volume and pressure of the valve having the maximum opening degree is, on average, considerably poor in terms of sensitivity.

[0005] In particular, in response to a demand for further increasing the opening of the air flow adjusting damper in adjusting the ventilation air volume and the room pressure, the air flow adjusting damper (particularly, the maximum opening degree) which remains biased near the full open state. ), There is no room for the remaining opening width until full opening, and adjustment of the damper opening is not enough to cope with the situation. This often occurs, and for this reason, although the amount of ventilation and the room pressure deviate from the target set value for some reason, it often takes a considerable time to resolve the state.

On the other hand, if a form is adopted in which the fan output is adjusted so that the openings of the air volume adjusting dampers are all within the target intermediate opening range set at the upper and lower limits to the intermediate opening value. It is possible to prevent the air volume adjustment damper (particularly the one with the maximum opening) from exceeding the upper limit value (intermediate opening value) of the target intermediate opening range toward the opening side and staying near the fully open position, Due to the characteristics, it is possible to maintain the operation in which the air volume / pressure adjustment function of the air volume adjustment damper is well maintained in terms of sensitivity. In particular, the air volume adjustment damper (especially the one with the maximum opening degree) can be used to adjust the ventilation volume and room pressure. If there is a request to increase the opening, the margin between the upper limit value of the target intermediate opening range and the full opening is set as a marginal opening area that allows temporary excess of the opening degree. In these respects,
The adjustment performance of adjusting the ventilation amount of the branch air passage to each set ventilation amount or adjusting the room pressure of the target room to each set room pressure can be greatly improved.

[0007] (b) In the above-mentioned alternative type, when airflow adjustment dampers other than the maximum opening degree (a part or all of them) are largely biased toward the closing side in adjusting the ventilation volume and room pressure, Despite the large bias toward the closing side, the one with the maximum opening degree is in the vicinity of the lower limit of the range for the time being within the above-mentioned predetermined opening degree range. There is a case where the large bias toward the closing side is left as it is, and as a result, the air volume and pressure adjustment of the air volume adjustment damper other than the maximum opening degree greatly deteriorates in terms of stability in terms of damper characteristics. It may be.

On the other hand, if the output of the fan is adjusted so that the opening of the air volume adjusting damper is within the range of the target intermediate opening which is set to the intermediate opening in both upper and lower limits, When the airflow adjustment damper with the minimum opening exceeds the lower limit (intermediate opening value) of the target intermediate opening range to the closing side, including that the other than the maximum opening is greatly biased toward the closing side, In this way, it is possible to prevent the air volume adjustment damper from being greatly biased toward the closing side, and to maintain the air volume / pressure adjustment function of the air volume adjustment damper in terms of stability in terms of damper characteristics, and to maintain operation. At this point, the adjustment performance of adjusting the ventilation amount of the branch air passage to each set ventilation amount or adjusting the room pressure of the target room to each set room pressure can be further improved. In addition, by preventing such a large deviation of the airflow adjustment damper toward the closing side, power waste due to operating the fan with a large pressure loss at the damper can be more effectively prevented, and the fan consumption can be reduced. Power can be further reduced.

[0009] However, in this type, although having the above-mentioned advantages, in order to make all the air volume adjustment dampers fall within the range of the target intermediate opening degree range, the opening degree of each air volume adjustment damper is set in the range setting. In order to set the range of the target intermediate opening range to a certain extent in anticipation that variations will occur in the target intermediate opening range, all air volume adjustment dampers are within the fixed target intermediate opening range after setting. However, the opening degree of the air flow adjustment dampers may remain in a state of being entirely biased toward the upper limit of the range or, conversely, may remain in a state of being biased toward the lower limit of the range.・
There is still room for improvement in making the air volume adjustment dampers have the air volume adjustment function or the room pressure adjustment function while maintaining the pressure adjustment function as good as possible as a whole.

[0010] In view of the above circumstances, the main problem of the present invention is to connect the main air path to the main air path so that the opening degrees of the air volume adjustment dampers provided in each of the branch air paths are all within the target intermediate opening degree range. By adopting a more rational control form in the form of adjusting the output of the fan, the air flow adjustment damper as a whole is further made to have a ventilation volume adjustment function or a room pressure adjustment function with a good air volume / pressure adjustment action. It is in.

[0011]

[1] According to the first aspect of the present invention, based on the detected opening degrees of the air volume adjustment dampers provided in each of the branch air passages for a plurality of target chambers, the opening degrees of these air volume adjustment dampers are determined. In the operation of adjusting the output of the fan connected to the main air passage so that the upper and lower limit values are all within the target intermediate opening range set to the intermediate opening value, the detection opening of these air flow adjustment dampers When the average value of the degrees becomes smaller than the set target average value, the target intermediate opening range is shifted to the large opening side to correct the range, so that the openings of all the air volume adjustment dampers fall within the corrected range. Above, there is a tendency to adjust the fan to the lower side, and all the air volume adjustment dampers are adjusted to the open side in adjusting the ventilation volume and room pressure for the fan output adjustment to the lower side. Of those air volume adjustment dampers So that tends to return the average value of degrees to the side of the set target average value generated.

That is, in the conventional system in which the target intermediate opening range after setting is fixed, the opening degree of the air volume adjustment damper is entirely within the range of the fixed target intermediate opening range. In the same situation, it is possible to correct the degree of opening of these air volume adjustment dampers as a whole to the open side, while the state may remain biased toward the lower limit.

On the other hand, when the average value of the detected opening of the air volume adjusting damper is larger than the set target average value, the target intermediate opening range is corrected by shifting the range to the small opening side. In order to keep the opening of all air volume adjustment dampers within the range, it is necessary to adjust the fan to the output increasing side, and to adjust the fan output to this rising side in adjusting the ventilation volume and room pressure. All the air volume adjustment dampers are adjusted to open to the closing side so that the average value of the air volume adjustment dampers tends to return to the set target average value.

That is, in the conventional system in which the target intermediate opening range after the setting is fixed, the opening degree of the air volume adjusting damper is entirely within the range of the fixed target intermediate opening range. In the same situation, it is possible to correct the degree of opening of these air volume adjustment dampers as a whole to the closed side, in contrast to the state where the air flow is still biased toward the upper limit.

Therefore, according to the first aspect of the present invention, the airflow is as good as possible in terms of both the sensitivity and the stability in terms of the damper characteristics, while taking into account the pressure loss at the damper as the set target average value.・ By setting the opening value that can obtain the pressure adjustment function, the airflow adjustment damper as a whole is more effective than the conventional system, and the airflow adjustment function or the room pressure adjustment function with good airflow and pressure adjustment It is possible to adjust the ventilation amount of the branch air passage to each set ventilation amount, or to further improve the adjusting performance of adjusting the room pressure of the target room to each set room pressure. it can.

Further, since the state in which the air volume adjusting damper as a whole is biased to the closing side (the state in which the average opening value is smaller than the set target average value) can be suppressed, the power consumption of the fan can be more effectively reduced. it can.

If the air flow in some of the branch air paths is stopped by forcibly closing the air volume adjustment damper or closing a separate shut-off damper, the air flow is reduced. The degree of opening of the air volume adjustment damper in the stopped branch air path is excluded from each of a determination target of whether or not within the target intermediate degree of opening range and a calculation target of the average degree of opening. The flow rate adjustment for the remaining branch air path and the room pressure adjustment for the target room connected to the remaining branch air path were performed in accordance with the opening of the air flow adjustment damper without being affected by the branch air path that was stopped. It is possible to appropriately perform output adjustment of a fan and shift correction of a target intermediate opening range in accordance with an average opening value.

As a specific modification of the range shift correction, the upper and lower limits of the target intermediate opening range itself are changed in accordance with the average value of the detected opening, and for example, the opening of the air volume adjusting damper is changed. Upper and lower limit values of the target intermediate opening range are substantially corrected, for example, by correcting the detected opening amounts used for determining whether or not all the values are within the target intermediate opening range according to the average value of the detected opening degrees. May be modified to make the same as changing the value according to the average value of the detected opening degrees.

As a specific correction operation of the range shift correction, a correction criterion in which a correction amount (including a correction direction) is associated with a deviation between the average value of the detected opening and the set target average value is set in advance. Every, and a form in which the target intermediate opening range is shifted by a correction amount corresponding to the current average value deviation based on the correction criterion, or while the average value of the detected opening is outside the set target average value, A mode in which the target intermediate opening range is shifted by a predetermined amount at predetermined time intervals in a direction opposite to the departure direction, or is continuously shifted at a predetermined speed, and in some cases, the average value of the detected opening is set to the set target. When the value deviates from the average value, various transition modes can be adopted, such as a mode in which the target intermediate opening range is shifted by a fixed correction amount in a direction opposite to the departure direction.

Furthermore, the set target average value may be provided by one opening value or by an opening range having an appropriate range width. When the opening degree is given, the intended purpose of the ventilation volume adjustment function or the room pressure adjustment function with the air volume / pressure adjustment function as good as possible as a whole can be achieved at a higher level. When the target average value is given in an opening range having an appropriate range width, the frequency of the range shift correction is reduced to reduce the frequency of the fan output change and the damper opening change accompanying the range shift correction. Thereby, the stability of operation can be improved.

[2] In the invention according to claim 2, in correcting the target intermediate opening range, the intermediate opening value of the large opening side correction limit with respect to the upper limit value of the target intermediate opening range and the small opening value with respect to the lower limit value. Since each of the side correction limit and the intermediate opening value is specified, in the range correction, the target intermediate opening range is corrected indefinitely to a state where the opening is fully open or an opening close to full opening, and instead, It is possible to prevent the possibility that the airflow adjustment damper (especially the one with the maximum opening) is allowed to be biased near the fully open state. Operation in a state where the pressure adjustment effect is greatly deteriorated beyond a certain limit in terms of sensitivity, and the fact that it becomes impossible to immediately respond to a request to increase the opening degree in ventilation volume adjustment or room pressure adjustment by adjusting the damper opening. Can be more reliably prevented

Similarly, in the range correction, the target intermediate opening range is corrected indefinitely until the range is set to a fully closed state or an opening degree close to the fully closed state. It is possible to prevent the possibility that the state in which the opening degree is largely deviated toward the closing side is allowed, thereby stabilizing the airflow / pressure adjusting action of the airflow adjustment damper (in particular, the one with the minimum opening degree). As a result, it is possible to more reliably prevent the operation in a state of being greatly deteriorated to a certain limit or more, and prevent the loss of fan power from increasing due to an increase in pressure loss at the air volume adjustment damper.

That is, according to the second aspect of the present invention, basically, while taking the form of correcting the range of the target intermediate opening degree in accordance with the average opening degree of the airflow adjustment damper, the airflow adjustment damper is basically used. The advantages of the above (a) and (b) in the form in which the output of the fan is adjusted so that all the opening degrees are within the range of the target intermediate opening range in which both the upper and lower limit values are set to the intermediate opening value are ensured. It can be maintained, and the ventilation amount of the branch air passage is adjusted to each set ventilation amount, or the adjustment performance of adjusting the room pressure of the target room to each set room pressure, and
It is possible to further reduce the power consumption of the fan.

Incidentally, in order to make the air volume adjustment damper function as a whole as much as possible with the air volume / pressure adjustment function as good as possible, a target intermediate opening having a predetermined range width may be used. There may be a method in which the fan output is simply adjusted so that the average value of the opening of the air volume adjustment damper is equal to the set target average value without providing a degree range.However, in this case, each of the fans is adjusted without changing the average value. When the airflow adjustment damper changes the opening, there is no change in the average opening even if the one with the maximum opening is biased close to full open or the one with the minimum opening is biased close to fully closed. As long as the output of the fan is not adjusted, the biased state is left as it is, and in this regard, the invention according to claim 2 is more excellent.

In the range shift correction of the target intermediate opening range, an intermediate opening value of the large opening side correction limit with respect to the upper range limit and an intermediate opening value of the small opening side correction limit with respect to the range lower limit value are defined. In addition to taking the form of numerically defining the upper and lower limits themselves as specific intermediate opening values, for example, by substantially defining an allowable change range with respect to the center value of the range of the target intermediate opening range, etc. A prescribed form may be adopted in which the upper and lower limits of the target intermediate opening range are set to be equal to numerically defining the intermediate opening value.

[3] According to the third aspect of the present invention, as a specific adjustment form of adjusting the output of the fan so that the opening of the air volume adjusting damper is all within the target intermediate opening range, the detected opening is The output of the fan rises when the largest one of them deviates from the target intermediate opening range to the large opening side (that is, the one with the maximum opening of the air flow adjustment damper deviates from the target intermediate opening range to the opening side) In response to this increase in the fan output, the airflow adjustment damper is adjusted to the closed side as a whole in adjusting the ventilation volume and room pressure. Return within the range.

In this case, regardless of whether the smallest one of the detected opening degrees deviates from the target intermediate opening range to the small opening side, as described above, the largest one of the detected opening degrees Only deviates from the target intermediate opening range toward the large opening by increasing the fan output.
An adjustment mode in which, among the air volume adjustment dampers, the one with the minimum opening is within the range of the target intermediate opening range is given priority over the one with the maximum opening being within the range of the target intermediate opening range.

On the other hand, in a state where the largest one of the detected openings is within the range of the target middle opening range, the smallest one of the detected openings deviates from the target middle opening range toward the small opening side ( That is, when the minimum opening of the air flow adjustment dampers deviates from the target intermediate opening range to the closed side, the output of the fan is reduced. By adjusting the opening of the air volume adjusting damper to the open side as a whole, the air volume adjusting damper having the minimum opening is returned to the range of the target intermediate opening range.

When all of the detected openings are within the range of the target intermediate opening range, the output of the air volume adjustment damper is maintained within the range of the target intermediate opening range by maintaining the fan at the output at that time. To keep the status quo within.

That is, according to the third aspect of the present invention, when the openings of the respective air volume adjustment dampers change in adjusting the ventilation volume and the room pressure, the degree of variation in the opening degrees of the air volume adjustment dampers changes. In particular, a change in the set ventilation volume of the branch air passage, a change in the set room pressure of the target room, or a change in the ventilation resistance of the filter arranged in the branch air passage, etc.), and depending on the degree of variation thereof, While it may not be possible to keep all the openings of the airflow adjustment damper within the range of the target intermediate opening range, as described above, the airflow adjustment damper having the minimum opening is set to the target intermediate opening range. Should be avoided most in the adjustment of ventilation volume and room pressure by adopting an adjustment mode that gives priority to keeping the maximum opening within the range of the target intermediate opening range rather than within the range of The situation, that is, A situation in which the volume adjustment damper (especially the one with the maximum opening) is biased close to full open, and it is not possible to immediately respond to the request to increase the opening in airflow adjustment or room pressure adjustment by adjusting the damper opening. It can be prevented more reliably.

In order to adjust the output of the fan, while the damper with the maximum opening or the minimum opening of the air volume adjustment dampers deviates from the target intermediate opening range, the fan is moved to the side where the deviation is eliminated. The output of the fan at a constant output change speed, or eliminate the fan output at a larger output change speed as the deviation of the maximum opening or minimum opening from the target intermediate opening range increases. Various adjustment modes, such as an adjustment mode for changing to the side, can be adopted.In the case of the latter adjustment mode, the larger the amount of deviation, the faster the output of the fan is changed at a large output change speed, so that the deviation can be quickly resolved, Further, as the deviation amount is smaller, the output of the fan is changed at a smaller output change speed, so that an overshoot-like phenomenon is prevented and the operation is stabilized.

[4] In the invention according to claim 4, in addition to the range shift correction, the smaller the difference between the maximum and minimum detected opening degrees, the larger the upper limit value of the target intermediate opening range. Correct both the lower limit and the predetermined value to the range reduction side,
In addition, as the difference between the maximum and minimum detection openings increases, both the upper limit value and the lower limit value of the target intermediate opening range are corrected at a predetermined ratio toward the range expansion side. Thereby, the following functions can be obtained.

That is, when the openings of the respective air volume adjustment dampers change in adjusting the ventilation volume and the room pressure, the degree of variation of the apertures may change as described above. Is that the range width of the target intermediate opening range is larger than necessary, compared to the difference between the maximum and minimum openings (maximum and minimum opening differences) of the air volume adjustment damper. The dead opening width between the upper limit of the range and the dead opening width between the minimum and the lower limit of the range becomes excessively large. The function to correct the opening of the airflow adjustment damper (that is, to correct the average opening) by changing the range of the airflow, and the fan's ability to adjust the opening of the airflow adjustment damper without changing the average opening Responsiveness of function to correct damper opening with output adjustment There is a case in which lowered.

On the other hand, depending on the degree of variation, conversely, the range width of the target intermediate opening range becomes smaller than the maximum / minimum opening difference of the air volume adjustment damper, and all the openings are within the target intermediate opening range. Therefore, the output adjustment operation of the fan performed for the purpose of keeping all the openings within the target intermediate opening range may be unstable.

On the other hand, if the above range width correction is performed,
The target intermediate opening range can cover all the opening degrees with respect to the change of the maximum and minimum opening degree difference due to the variation, and the maximum opening degree and the upper limit of the range can be set. Or the dead opening width between the minimum opening and the lower limit of the range (the dead opening width prevents operation of the fan output adjustment frequency from becoming excessive). (Necessary for stabilization) can be maintained in an appropriate range width, which makes it possible to effectively prevent the decrease in responsiveness as described above, and as a whole the air volume adjustment damper minimizes air volume and pressure. It is possible to more effectively achieve the intended purpose of performing the ventilation amount adjusting function or the room pressure adjusting function with a good adjusting action, and also to prevent the output adjustment operation of the fan from becoming unstable as described above, thereby stabilizing the operation. be able to.

In addition, due to various factors such as a change in the set ventilation volume of the branch air passage, a change in the set chamber pressure of the target room, and a change in the ventilation resistance of the filter arranged in the branch air passage, the degree of variation in the damper opening degree may vary. Each time, there is no need to perform complicated operations such as adjusting the target intermediate opening range to an appropriate width by resetting the target intermediate opening range each time, and system management is greatly facilitated.

In the above range width correction, as in the second aspect of the invention, the intermediate opening value of the large opening side correction limit with respect to the upper limit of the target intermediate opening range and the small opening side with respect to the lower limit value. An intermediate opening value of the correction limit is defined, and this allows the range width to be adjusted indefinitely to a state where the full opening or an opening close to full opening is set to the upper limit of the range. Degree) can be allowed to be biased near full open, and the range width can be corrected indefinitely to the state where the range lower limit is set to fully closed or close to fully closed. On the contrary, it is desirable to prevent a possibility that the air volume adjustment damper (particularly, the one with the minimum opening degree) is allowed to be largely biased toward the closing side.

For each of the range shift correction and the range width correction, the intermediate opening value of the large opening side correction limit with respect to the upper limit value of the target intermediate opening range and the intermediate opening value of the small opening side correction limit with respect to the lower limit value. When defining the values, the intermediate opening values of the large opening-side correction limit for both corrections and the intermediate opening values of the small opening-side correction limit are made to match with each other, so that both corrections are consistent. It is desirable to stabilize the operation.

When the range width correction is performed, the range width of the target intermediate opening range can be maintained at an appropriate width with respect to the change in the maximum / minimum opening degree difference. According to the invention described in the above description, the maximum opening priority is given to the fan adjustment mode, that is, the airflow adjustment damper having the maximum opening is set to the target intermediate opening rather than being kept within the target intermediate opening range. There is no situation in which fan output adjustment that gives priority to staying within the range is particularly required, but the range upper limit value reaches the above-mentioned large opening side correction limit due to range shift correction and range width correction, and the range is expanded. The maximum opening degree according to the invention according to claim 3, in order to more reliably prevent a state in which the air volume adjustment damper (especially the one with the maximum opening degree) is biased near the full opening when the correction of the range width is limited. Priority fan adjustment State is enabled.

In the range width correction, in order to correct both the upper limit value and the lower limit value of the target intermediate opening range to the range reduction side or the range expansion side at a predetermined ratio, the correction ratio between the upper limit value and the lower limit value is the same. Alternatively, the ratios may be different from each other, and various values may be adopted as the correction ratio according to operating conditions and the like. In order to more reliably prevent a situation where the adjustment degree of the opening of the adjustment damper does not allow quick adjustment, it is desirable that the correction ratio of the upper limit is smaller than the correction ratio of the lower limit.

It is possible to forcibly fully close the air volume adjustment damper,
When the ventilation in some of the branch air paths may be stopped by closing a separate cut-off damper or the like, the opening degree of the air volume adjustment damper in the branch air path in which the ventilation is stopped is:
As in the case of the range shift correction, it is excluded from the calculation target of the maximum and minimum opening differences in the range width correction, and thus, the flow rate of the remaining branch air paths is not affected by the branch air path where the ventilation is stopped. In the adjustment and the room pressure adjustment of the target room connected to the remaining branch air passage, the range width of the target intermediate opening range according to the maximum and minimum opening difference can be appropriately corrected.

[0042]

Next, an embodiment of the present invention will be described.

FIG. 1 shows an air-conditioning system for a plurality of target rooms 1, 2 is a main air supply passage connected to the discharge side of an air supply fan Fs, and 3 is a main exhaust air passage connected to the suction side of an exhaust fan Fr. Each of the target chambers 1 is connected to the main supply air passage 2 via a supply-side branch air passage 2a and to the main exhaust air passage 3 via an exhaust-side branch air passage 3a. Reference numeral 4 denotes an air conditioner for adjusting the temperature and humidity of the air supplied to the target room 1.

Vs denotes an air flow adjustment damper on the air supply side interposed in each of the branch air passages 2a on the air supply side. The air flow amount qs to each target chamber 1 is adjusted by adjusting the opening of the air flow adjustment damper Vs on the air supply side. To adjust.

Vr is an exhaust-side air volume adjusting damper interposed in each exhaust-side branch air passage 3a. The exhaust air volume adjusting damper Vr controls the opening degree of the exhaust-side air volume adjusting damper Vr to reduce the amount of exhaust qr from each target chamber 1. The adjustment adjusts the chamber pressure p (specifically, the differential pressure between the inside and outside of the room) of each target room 1.

Reference numeral 5A denotes an air supply side damper controller as a damper control means for the air supply side air volume adjustment damper Vs. These air supply side damper controllers 5A supply air amount qs to each target chamber 1 (in other words, qs). For example, the air supply side based on the air supply amount qs detected by the air supply amount sensor 6 so that the air supply side branch air passage 2a has the air supply amount qss (the air flow amount set) set by the general controller CC. The opening of the air volume adjustment damper Vs is adjusted.

Reference numeral 5B denotes an exhaust-side damper controller as a damper control means for the exhaust-side air volume adjusting damper Vr. The exhaust-side damper controller 5B controls the chamber pressure p of each target chamber 1 by a general controller CC. The opening degree of the exhaust-side air volume adjusting damper Vr is adjusted based on the chamber pressure p detected by the room pressure sensor 7 so that the pressure becomes ps.

For the supply fan Fs, the pressure sensor 8
a supply fan controller 9A for controlling the output of the supply fan Fs by inverter control so that the air path pressure fs of the main air supply path 2 becomes the set air path pressure fss based on the detected air path pressure fs. On the other hand, the general controller CC has the detection opening degrees a1 to a of each of the supply-side air volume adjustment dampers Vs.
2, the opening degrees a1 to a3 of these supply-side air volume adjustment dampers Vs are all upper and lower limit values x1 and x2, as shown in FIG.
A supply-side air-path pressure adjusting unit that changes the set air-path pressure fss on the air supply side so as to be within the target intermediate opening degree range X on the air supply side, both of which are set to the intermediate opening value. 10A is provided.

For the exhaust fan Fr, the main exhaust air passage 3 is determined based on the air passage pressure fr detected by the pressure sensor 8b.
Is provided with an exhaust fan controller 9B for adjusting the output of the air supply fan Fr by inverter control so that the air path pressure fr becomes the set air path pressure frs. Similarly to the side (see FIG. 2), based on the detection openings b1 to b3 of the exhaust-side air volume adjustment dampers Vr, all of the openings b1 to b3 of the exhaust-side air volume adjustment dampers Vr are intermediate in both the upper and lower limit values y1 and y2. An exhaust-side air path pressure adjusting unit 10B that changes the set air path pressure frs on the exhaust side so as to be within the target intermediate opening degree range Y on the exhaust side set to the opening degree value is provided. .

That is, the air supply fan controller 9A and the air supply side air passage pressure adjusting unit 10A are connected to the air supply side air volume adjustment dampers Vs based on the detected opening degrees a1 to a3 of the air supply side air volume adjustment dampers Vs. The air supply side fan control means for adjusting the output of the air supply fan Fs so that all the opening degrees a1 to a3 of Vs fall within the range of the target intermediate opening degree range X on the air supply side,
The exhaust fan controller 9B and the exhaust-side air-path pressure adjusting unit 10B are connected to the exhaust-side airflow-adjustment dampers Vr with respective detection openings b1 to b.
3, the opening b of these exhaust-side air volume adjustment dampers Vr
An exhaust-side fan control unit that adjusts the output of the exhaust fan Fr so that all of 1 to b3 are within the target intermediate opening degree range Y on the exhaust side is configured.

The air supply pressure adjusting section 10A on the air supply side specifically changes the set air pressure fss of the main air supply air path 2 in the following modes (a) to (c).

(A) When the largest one of the detected openings a1 to a3 of the air supply side air volume adjustment damper Vs deviates from the target intermediate opening range X on the air supply side to the large opening side, these air supply Regardless of whether or not the smallest one of the detection openings a1 to a3 of the side air volume adjustment damper Vs deviates from the target intermediate opening range X on the supply side to the small opening side, the main supply air passage 2 Set air path pressure f
Change ss to the ascending side.

That is, by changing the set air path pressure fss to the rising side, the air supply fan Fs is adjusted to the output rising side. The opening of each of Vs is adjusted to the closing side, thereby eliminating the deviation to the large opening side.

At this time, the larger the detected opening degree a1 to a3 is, the larger the deviation amount from the target intermediate opening degree range X on the air supply side is, the larger the change speed is, the larger the set air flow path of the main air supply air path 2 is. The pressure fss is changed to the rising side, and the larger the deviation amount of the above-mentioned maximum one is, the larger the output change speed becomes.
s output is increased.

(B) Supply-side air volume adjustment In a state where the largest of the detected openings a1 to a3 of the damper Vs is within the target intermediate opening range X on the air supply side, the airflow adjustment on the supply side is performed. When the smallest one of the detected openings a1 to a3 of the damper Vs deviates from the target intermediate opening range X on the supply side to the small opening side, the set air passage pressure fss of the main air supply passage 2 is reduced. Change to the side.

That is, the air supply fan Fs is adjusted to the output decrease side by changing the set air path pressure fss to the decrease side, and the air supply side air amount adjustment damper is adjusted with respect to the output adjustment in adjusting the air supply amount qs. The opening of each of Vs is adjusted to the opening side, thereby eliminating the deviation to the small opening side.

At this time, as for the smallest one of the detected opening degrees a1 to a3, the larger the deviation amount from the target intermediate opening degree range X on the air supply side, the larger the change speed at which the main air supply path 2 is set. The pressure fss is changed to the lower side, and the larger the deviation amount of the minimum one is, the larger the output change speed becomes.
s output is reduced.

(C) When all of the detection openings a1 to a3 of the air supply side air volume adjustment damper Vs are within the target intermediate opening range X on the air supply side (the state shown in FIG. 2), the main air supply passage 2 is maintained at the current value.

That is, with this, the air supply fan Fs is maintained at the output at that time, and the openings a1 to a3 of the air supply side air volume adjustment damper Vs are all within the target intermediate opening range X on the air supply side. Try to keep the status quo.

On the other hand, the air flow path pressure adjusting section 10B on the exhaust side is similar to the air flow path pressure control section 10A on the air supply side, specifically, in the following (d) to (f) modes. Set air path pressure fr
s is changed.

(D) Exhaust-side air volume adjustment When the largest one of the detected openings b1 to b3 of the damper Vr deviates from the target intermediate opening range Y on the exhaust side to the large opening side, the exhaust-side air volume adjustment is performed. Regardless of whether or not the smallest one of the detected openings b1 to b3 of the damper Vr deviates from the target intermediate opening range Y on the exhaust side to the small opening side, the set air passage pressure of the main exhaust air passage 3 f
Change rs to a lower side.

That is, the exhaust fan Fr is adjusted to the output increasing side by changing the set air path pressure frs to the decreasing side, and each of the exhaust-side air volume adjusting dampers Vr is adjusted for the output pressure in adjusting the room pressure p. Is adjusted to the closing side, thereby eliminating the deviation to the large opening side.

At this time, for the largest one of the detected opening degrees b1 to b3, the larger the deviation amount from the target intermediate opening degree range Y on the exhaust side, the larger the set speed of the main exhaust air path 3 at a larger change speed. frs is changed to the lower side, and the larger the deviation amount of the maximum one is, the larger the output change speed of the exhaust fan F becomes.
Increase the output of r.

(E) With the largest one of the detected openings b1 to b3 of the exhaust-side air volume adjustment damper Vr being within the target intermediate opening range Y on the exhaust side, the exhaust-side air volume adjustment damper Vr When the smallest of the detected openings b1 to b3 deviates from the target intermediate opening range Y on the exhaust side to the small opening side, the set air passage pressure frs of the main exhaust air passage 3 is changed to the ascending side. .

That is, by changing the set air path pressure frs to the rising side, the exhaust fan Fr is adjusted to the output decreasing side, and the exhaust side air volume adjusting dampers Vr are adjusted for the output pressure by adjusting the chamber pressure p. Is adjusted to the opening side, thereby eliminating the deviation to the small opening side.

At this time, for the smallest one of the detected opening degrees b1 to b3, the larger the deviation amount from the target intermediate opening degree range Y on the exhaust side, the larger the change speed at which the set air pressure of the main exhaust air path 3 is set. frs is changed to the ascending side, and the larger the deviation amount of the above minimum one is, the larger the output change speed becomes.
The output of r is reduced.

(F) When all of the detected openings b1 to b3 of the exhaust-side air volume adjusting damper Vr are within the target intermediate opening range Y on the exhaust side (the state shown in FIG. 2), the main exhaust air path 3 The set air path pressure frs is maintained at the current value.

In other words, the exhaust fan Fr is thereby maintained at the output at that time, and the opening b1 to b3 of the exhaust-side air volume adjusting damper Vr is all maintained within the target intermediate opening range Y on the exhaust side. To do.

In the general controller CC, in addition to the above-described air passage pressure adjusting units 10A and 10B, an air supply side range for automatically correcting the air supply side target intermediate opening degree range X as air supply side target range correction means. A correction unit 11A is provided.
1A is the detected opening degree a1 of each air supply side air volume adjustment damper Vs.
The following corrections (A) and (B) are executed based on .about.a3.

(A) Range change correction on the air supply side: The average value Ha (= (a1 + a2 + a3) / 3) of the detection openings a1 to a3 of the air supply side air volume adjustment damper Vs is smaller than the set target average value Has. Then, based on a correction criterion in which a correction amount Δx (including a correction direction) is previously associated with a deviation ΔHa between the opening average value Ha and the set target average value Has, a correction amount Δx according to the current average value deviation ΔHa. However, the target intermediate opening range X on the air supply side is corrected to shift to the large opening side as shown in FIG.

That is, by this correction, the air supply fan Fs can be used to keep the openings a1 to a3 of all the air supply-side air volume adjustment dampers Vs within the corrected target intermediate opening degree range X on the air supply side. Tend to be adjusted to the output decreasing side. On the other hand, in order to adjust the air supply amount qs, each air supply side air volume adjustment damper Vs is adjusted to the open side to adjust the air supply amount qs. An average value Ha of the openings a1 to a3 tends to return to the set target average value Has.

On the other hand, when the average value Ha of the detected opening degrees a1 to a3 of the supply-side air volume adjustment damper Vs becomes larger than the set target average value Has, the current average value deviation ΔHa is calculated based on the above-mentioned correction criterion. The target intermediate opening range X on the air supply side is shifted and corrected to the small opening side as shown in FIG. 4 by the corresponding correction amount Δx.

That is, by this correction, the air supply fan Fs can be used to keep the openings a1 to a3 of all the air supply side air volume adjustment dampers Vs within the corrected target intermediate opening degree range X on the air supply side. To the output increasing side. On the other hand, in order to adjust the air supply amount qs, the opening degree of each air supply side air amount adjustment damper Vs is adjusted to the closing side, and the air amount adjustment damper Vs of these air supply side air amount adjustment dampers Vs is adjusted. An average value Ha of the openings a1 to a3 tends to return to the set target average value Has.

(B) Correction of the supply-side range width: The difference Δa (maximum-minimum opening difference) between the maximum and minimum detection openings a1 to a3 of the air supply-side airflow adjustment damper Vs is small. Indeed, as shown in FIG. 5, both the upper limit value x1 and the lower limit value x2 of the target intermediate opening degree range X on the air supply side are corrected to the range reduction side at a predetermined ratio (in this example, the same ratio). As the maximum / minimum opening degree difference Δa increases, both the upper limit value x1 and the lower limit value x2 of the target intermediate opening degree range X on the air supply side are corrected to a range expansion side at a predetermined ratio (same ratio) as shown in FIG.

That is, this correction allows the target intermediate opening degree range X on the air supply side to be independent of the change in the maximum-minimum opening degree difference Δa due to the variation in the degree of opening a1-a3 of the air supply-side airflow adjustment damper Vs. It is possible to accommodate all of the openings a1 to a3 of the supply-side air volume adjustment damper Vs as the range width, and to set the range between the maximum one of the openings a1 to a3 and the range upper limit value x1. Dead opening width and their opening degrees a1 to a3
Of the minimum and the range lower limit value x2, an appropriate range width (in this example, a range width (Δa + e which is always larger by a certain width ex than the maximum / minimum opening degree difference Δa).
x)) is maintained.

FIG. 7 shows a case where both the range shift correction toward the large opening and the range width correction toward the range reduction side are performed. 3 to 7, illustration of specific openings a1 to a3 (b1 to b3) of the air volume adjustment damper Vs (Vr) is omitted.

On the other hand, on the exhaust side, the general controller CC
An exhaust-side range correcting unit 11B for automatically correcting the target intermediate opening degree range Y on the exhaust side is provided as a target-range correcting unit on the exhaust side. The exhaust-side range correcting unit 11B includes an exhaust-side air volume adjusting damper Vr. Based on the detected opening degrees b1 to b3, the following corrections (C) and (D) are executed similarly to the air supply side.

(C) Exhaust-side range shift correction: When the average value Hb (= (b1 + b2 + b3) / 3) of the detection openings b1 to b3 of the exhaust-side air volume adjustment damper Vr becomes smaller than the set target average value Hbs, Based on a correction criterion in which a correction amount Δy (including a correction direction) is previously associated with a deviation ΔHb between the opening average value Hb and the set target average value Hbs, a correction amount Δy corresponding to the current average value deviation ΔHb is obtained. The shift of the target intermediate opening range Y on the exhaust side to the large opening side is corrected (FIG. 3).
refer.

That is, by this correction, the output of the exhaust fan Fr is reduced while keeping the openings b1 to b3 of all the exhaust-side air volume adjusting dampers Vr within the corrected target intermediate opening degree range Y on the exhaust side. On the exhaust side air flow adjustment damper Vr in adjusting the room pressure p.
Is adjusted to the opening side, and the average value Hb of the opening degrees b1 to b3 of these exhaust-side air volume adjustment dampers Vr is set to the set target average value H.
bs.

On the other hand, when the average value Hb of the detected opening degrees b1 to b3 of the exhaust-side air volume adjustment damper Vr becomes larger than the set target average value Hbs, the average value deviation ΔHb based on the above-described correction criterion is used. The target intermediate opening range Y on the exhaust side is changed to a smaller opening side by the correction amount Δy (see FIG. 4).

That is, by this correction, the output of the exhaust fan Fr is increased while keeping the openings b1 to b3 of all the exhaust-side air volume adjustment dampers Vr within the corrected target intermediate opening degree range Y on the exhaust side. On the exhaust side air flow adjustment damper Vr in adjusting the room pressure p.
Is adjusted to the closing side, and the average value Hb of the opening degrees b1 to b3 of these exhaust-side air volume adjustment dampers Vr is set to the set target average value H.
bs.

(D) Exhaust-side range width correction: The smaller the difference Δb (maximum-minimum opening degree difference) between the maximum and minimum detection openings b1 to b3 of the exhaust-side air volume adjustment damper Vr, the smaller the difference. Both the upper limit value y1 and the lower limit value y2 of the target intermediate opening degree range Y on the exhaust side are corrected toward the range reduction side at a predetermined ratio (in this example, the same ratio) (see FIG. 5). As the difference Δb increases, the target intermediate opening degree range Y on the exhaust side increases.
Of both the upper limit y1 and the lower limit y2 of the predetermined ratio (the same ratio)
Is corrected to the range expansion side (see FIG. 6).

In other words, this correction allows the range of the target intermediate opening degree range Y on the exhaust side regardless of the change in the maximum / minimum opening degree difference Δb caused by the variation in the degree of opening b1 to b3 of the exhaust-side air volume adjustment damper Vr. As the width, all of the openings b1 to b3 of the exhaust-side air volume adjustment damper Vr can be accommodated, and a dead opening between the largest one of the openings b1 to b3 and the range upper limit value y1. The width and their degree of opening b1 to b3
Of the minimum and the range lower limit value y2, an appropriate range width (in this example, a range width (Δb + e which is always larger than the maximum and minimum opening difference Δb by a constant width ey).
y)) is maintained.

In the above-described range shift correction and range width correction on the air supply side, a correction limit value common to both corrections is an intermediate value between the upper limit x1 of the target intermediate opening range X on the air supply side and the upper limit x1. An opening value xx1 and an intermediate opening value xx2 of the small opening-side correction limit with respect to the lower limit value x2 are defined, whereby the range upper limit value xl greatly increases the intermediate opening value xx1 of the large opening-side correction limit. The range shift correction to the degree side and the range width correction to the range expansion side, and the range shift correction and the range expansion side where the range lower limit value x2 exceeds the intermediate opening value xx2 of the small opening side correction limit to the small opening side The range width is not corrected.

Similarly, in the range shift correction on the exhaust side and the range width correction, the correction limit value common to both corrections is the correction limit of the large opening degree limit with respect to the upper limit y1 of the target intermediate opening range Y on the exhaust side. An intermediate opening value yy1 and an intermediate opening value yy2 of the small opening side correction limit with respect to the lower limit value y2 are defined, and the upper limit value y1 of the range is an intermediate opening value y of the large opening side correction limit.
A range shift correction beyond y1 to the large opening side, a range width correction to the range expansion side, a range shift correction where the range lower limit y2 exceeds the intermediate opening value yy2 of the small opening side correction limit to the small opening side, The range width correction to the range expansion side is not performed.

In the air conditioning system according to the present embodiment, the supply-side air volume adjustment damper Vs and the exhaust-side air volume adjustment damper Vr are forcibly fully closed, and the supply-side and exhaust-side branch air paths 2a,
By closing the shut-off dampers Ds and Dr interposed in 3a, the supply and exhaust of some of the target rooms 1 can be selectively stopped. The opening degree of the air-side air volume adjustment damper Vs and the opening degree of the exhaust-side air volume adjustment damper Vr are objects to be determined whether or not within the target intermediate opening ranges X and Y, and the average of the opening degrees in the range shift correction. Excluded from the calculation targets of the values Ha and Hb and the calculation targets of the maximum and minimum opening differences Δa and Δb in the correction of the range width, the output of the fans Fs and Fr, the range shift correction, and the range width correction are executed. It is.

[Another Embodiment] Next, another embodiment of the present invention will be described.

In the above-described embodiment, the air flow qs (air supply to the target chamber 1) of each air supply side branch air passage 2a is adjusted to the set air flow qss by adjusting the opening of the air supply side air flow adjustment damper Vs. The example in which the chamber pressure p of each target chamber 1 is adjusted to the set chamber pressure ps by adjusting the opening degree of the exhaust-side air volume adjustment damper Vr has been described. The ventilation pressure qr (discharge rate from the target chamber 1) of each exhaust-side branch air passage 3a is adjusted to the set ventilation rate qrs, and the room pressure of each target chamber 1 is adjusted by adjusting the opening of the supply-side flow rate adjustment damper Vs. The present invention may be applied to a system that adjusts p to the set chamber pressure ps.

Further, the room pressure is not adjusted, and the air flow qs of each air supply side branch air passage 2a is adjusted to the set air flow qss by adjusting the opening of the air supply side air flow adjustment damper Vs. The present invention is applied to a system that implements one or both of adjusting the ventilation amount qr of each exhaust-side branch air passage 3a to the set ventilation amount qss by adjusting the opening degree of the air volume adjustment damper Vr, or both. Is also good.

Further, a system that only adjusts the chamber pressure p of each target chamber 1 to the set chamber pressure ps by adjusting the opening degree of the air supply side air volume adjustment damper Vs, or by adjusting the opening degree of the exhaust air volume adjustment damper Vr. The present invention may be applied to a system that only adjusts the room pressure p of each target room 1 to the set room pressure ps.

The target room 1 may be used for any purpose, and the purpose of room pressure adjustment and the purpose of ventilation volume adjustment may be any purpose.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an air conditioning system.

FIG. 2 is a diagram illustrating an adjustment mode of an air path pressure (fan output).

FIG. 3 is a diagram illustrating a correction mode of a range shift correction.

FIG. 4 is a diagram illustrating a correction mode of a range shift correction.

FIG. 5 is a view for explaining a correction mode of range width correction.

FIG. 6 is a view for explaining a correction mode of range width correction.

FIG. 7 is a diagram showing a combined correction of a range shift correction and a range width correction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Target room 2, 3 Main air path 2a, 3a Branch air path 5A, 5B Damper control means 9A, 10A Fan control means 9B, 10B Fan control means 11A, 11B Target range correction means Fs, Fr fan Vs, Vr Air volume adjustment damper qs Ventilation amount qss Set ventilation amount p Room pressure ps Set room pressure a1 to a3 Opening b1 to b3 Opening Ha, Hb Opening average Average Has, Hbs Setting target average Δa, Δb Maximum minimum opening difference X, Y Target Intermediate opening range x1, y1 Upper limit value xx1, yy1 Intermediate opening value of large opening side correction limit x2, y2 Lower limit value xx2, yy2 Intermediate opening value of small opening side correction limit

Claims (4)

[Claims] 1. A plurality of target chambers are connected in parallel to a main air path connected to a fan via a branch air path, and an air volume adjustment damper is provided for each of the branch air paths. Based on the air flow rate, the opening of the air volume adjustment damper is adjusted so that the air volume of these branch air channels becomes the respective set air volume, or the room pressure of these object rooms is adjusted based on the detection chamber pressure of each of the object rooms. And damper control means for adjusting the opening of the air flow adjustment damper so that each of the set chamber pressures is equal to the set room pressure. An air-conditioning system provided with fan control means for adjusting the output of the fan so as to be within a target intermediate opening range set to an intermediate opening value, wherein an average value of the detected opening is set to a target value. When it becomes smaller than the average value, The target to correct the range shift of the target intermediate opening range to the large opening side, and to correct the range shift of the target intermediate opening range to the small opening side when the average value of the detected opening is larger than the set target average value. An air conditioning system provided with range correction means. 2. In the range correction by the target range correcting means, an intermediate opening value of a large opening side correction limit with respect to an upper limit value of the target intermediate opening range and a small opening degree of a lower limit value of the target intermediate opening range. The air conditioning system according to claim 1, wherein an intermediate opening value of the side correction limit is defined. 3. The fan control means increases the output of the fan when the largest one of the detected opening degrees deviates from the target intermediate opening range to the large opening side. When the largest one is within the range of the target intermediate opening range and the smallest one of the detected openings deviates from the target intermediate opening range to the smaller opening side, the output of the fan is reduced. The air conditioning system according to claim 1, wherein the fan is maintained at the output at that time when all of the detected openings are within the target intermediate opening range. 4. The method according to claim 1, wherein the target range correcting means includes an upper limit value of the target intermediate opening range as a difference between a maximum one and a minimum one of the detected opening degrees becomes smaller. Both the lower limit and the lower limit are corrected to the range reduction side at a predetermined ratio, and the larger the difference between the maximum and minimum of the detected opening degrees is, the larger the upper limit value and the lower limit of the target intermediate opening range are. The air conditioning system according to any one of claims 1 to 3, wherein a range width correction is performed to correct both the value and the value to the range expansion side at a predetermined ratio.