JP4743515B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air-conditioning system that cools and heats indoors in factories, buildings, exhibition halls, etc., in particular, in each aspect such as use of unused energy, energy saving, reduction of operation cost, operation analysis / evaluation, and consideration for the global environment. The present invention relates to an air conditioning system that enables optimum operation.

Conventionally, for example, in an air conditioning system installed in a factory, outside air or return air is sucked into an air conditioning duct and further air-conditioned by a plurality of air conditioners installed in the factory, and then stretched around a ceiling in the factory. It is sent to the duct and finally discharged from the duct outlet to the work space.
Examples of this type of conventional air conditioning system include those described in Patent Documents 1 and 2.
Japanese Patent Laid-Open No. 10-246494 JP 2004-169972 A

In such an air-conditioning system using air conveyance, the air conditioner that is the supplier, the duct of the conveyance route, and the air outlet are fixed at the time of construction. Therefore, if the air outlet location is changed, the air outlet should be adapted to this. The duct system containing the must be changed. For this reason, there is a problem that costs such as equipment costs and repair costs are incurred every time the blowing location is changed. This means that the larger the change in the location, the higher the cost.

In addition, as control in the air conditioning system, an energy saving method is adopted in which the number of rotations of the air conditioner is controlled according to necessary conditions such as temperature, humidity, air volume, and wind speed at the blowing location. In addition to this, a control method in which a plurality of air conditioners cooperate to perform parallel operation is also conceivable, but the control method for parallel operation has not been established due to factors such as static pressure balance and airflow turbulence in the transfer duct. .
For this reason, when the air outlet location is changed as described above, although individual operation control of the air conditioner according to the required amount of the air outlet location, for example, the rotation speed control of the fan by the inverter can be performed, Thus, it is not possible to perform flexible energy saving control in which a plurality of air conditioners are selectively operated or the air conditioning load is shared in cooperation with the plurality of air conditioners. For this reason, there exists a problem that the optimal energy saving of the whole area | region used as air-conditioning object cannot be achieved.

The present invention, all SANYO been made in view of such problems, it is possible to reduce the cost of the ducting change due to blow out location changes, achieving optimum energy saving of the entire area to be air conditioned It aims to provide an air conditioning system that can.

To achieve the above object, an air conditioning system according to claim 1 of the present invention, 1 to the installation the outlet of the air duct is extended is blower opening or al min Toki multiple air conditioners for air conditioning target area In the air conditioning system that performs air conditioning in the area, the duct includes a plurality of upper layer ducts connected to the air outlets of the air conditioner, and the upper layer so as to intersect with the upper layer ducts in a vertical pattern. A plurality of middle-layer ducts arranged at predetermined intervals below the duct, a plurality of dampers for airflow adjustment, a plurality of connection ducts connecting the upper-layer duct and the middle-layer duct of the intersection, and one or more It is a matrix air-conditioning duct having the outlet and comprising a lowermost layer duct detachably attached to a plurality of openable and closable openings provided in the middle layer duct .

  According to this configuration, if the air-conditioning demand area is moved or changed when the air-conditioning target area is a wide area, for example, the lowermost duct having the outlet may be moved, removed, and attached accordingly. Can be easily accommodated. Therefore, because the outlet is fixed at the time of construction as in the conventional configuration, each time the outlet location is changed, changing the duct system including the outlet will require a large amount of equipment costs, repair costs, etc. Therefore, the cost for changing the duct system accompanying the change of the blowing location can be greatly reduced.

An air conditioning system according to claim 2 of the present invention is the air conditioning system according to claim 1, wherein the intersection of the upper layer and middle layer ducts fixed in a lattice pattern in the matrix air conditioning duct is regarded as the position coordinate of the damper. If the air conditioner is located at the intersection, the corresponding intersection is regarded as the position coordinate of the air conditioner if the nearest intersection is not located, and each damper located in the air conditioning target area requiring air conditioning, obtains each request air volume of the dampers together determine the respective distances between the air conditioner connected to the duct where the damper is built from both coordinates, the coefficients proportional to each request air volume as well as inversely proportional to the distance which is the calculated The air conditioners are prioritized so that the higher the calculated coefficient is, the higher the order is, and the total required air volume in the air-conditioning target area where the air conditioning is required is equalized. Selected according to the priority plurality of air conditioners capable of supplying a total air volume when allowed to, characterized in that it comprises an air conditioning control means for operating a plurality of air conditioners that this is selected.
According to this configuration, since a plurality of air conditioners can be operated in a linked manner while maintaining a predetermined static pressure so that all required airflows in an area requiring air conditioning can be supplied, the power of each air conditioner can be reduced. Efficient ventilation can be performed by covering with the total air volume. This can save energy.

The air conditioning system according to claim 3 of the present invention is the air conditioning system according to claim 2 , wherein the air conditioning control means uses the total required air volume of the air-conditioning target area that requires air conditioning as the total air volume when the static pressures are balanced with each other. Control that reflects the difference between the predicted energy consumption predicted by simulation according to the operation control conditions of a plurality of air conditioners that can be supplied in the above and the actual energy consumption during operation under the same operation control conditions in the coefficient. It is characterized by performing.

According to this configuration, it is possible to obtain a more appropriate coefficient, and thus energy saving can be further achieved.

According to the present invention described above, it is possible to reduce the cost of the ducting change due to blow out location changes, there is an effect that it is possible to achieve an optimum energy saving of the entire area to be air conditioned .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an air conditioning system according to an embodiment of the present invention.
An air conditioning system 10 shown in FIG. 1 is connected to first to third air conditioners 13-1 to 13-3 provided indoors in a factory 11 and air blowers of these air conditioners 13-1 to 13-3. The air conditioning ducts 15-1 to 15-6, 16-1 to 16-n and 17 stretched around the ceiling of the factory 11 and the air conditioners 13-1 to 13-3. And a control unit 18.

  Further, the air conditioning system 10 is disposed outside the factory 11 in the vicinity of the first to third evaporators 21-1, 21-2, 21-3 and these evaporators 21-1 to 21-3. Ducts 23-1, 23-2, which are attached to the hoods 22-1, 22-2 and 22-3 and which pass through the outer wall of the factory 11 and are attached to the intake ports of the air conditioners 13-1 to 13-3. 23-3, the suction fans 24-1, 24-2, 24-3 disposed in the air passages of the ducts 23-1 to 23-3, and the evaporators 21-1 to 21-3 Nozzle devices 25-1, 25-2, and 25-3 disposed at opposing positions of the respective hoods 22-1 to 22-3, and a pushing fan 26 disposed inside these nozzle devices 25-1 to 25-3. The temperature which detects the temperature of -1,26-2,26-3 and each evaporator 21-1 to 21-3 And capacitors 27-1,27-2,27-3, is constituted by a fan control unit 28.

Features of the air conditioning system 10 including such components will be described in the following (1) to (6).
(1) Recovery of cold air.
Each of the evaporators 21-1 to 21-3 includes a plurality of plate-like fins 21a from directly above, as shown in the plan view of the fin portion in FIG. 2A and the side view of the fin portion in FIG. It is composed in a star shape. Furthermore, the inside of each fin 21a becomes a cavity and is connected to each other. As shown in FIG. 3 representatively of the first evaporator 21-1, each fin 21a is fixed on a concrete base 21b. By combining the pipes 21c for passing the liquid nitrogen (or liquid oxygen) through the fins 21a, liquid nitrogen flows from the liquid nitrogen tank (not shown) as indicated by the arrow Y1a, and this passes through the inside of all the fins 21a, and the arrow Y1b. It is discharged as shown in.
The discharged liquid nitrogen is reused in a configuration such as being collected in a storage tank (not shown), for example.

When liquid nitrogen passes through the inside of each fin 21a, the air around the fin 21a is cooled by heat exchange, and a large amount of cold air, which is heat of vaporization, is generated. This cold air flows downward as indicated by arrow Y2.
In order to take this cold air into the duct 23-1, air is blown from the three nozzles of the nozzle device 25-1 by the pushing fan 26-1 as indicated by the arrow Y3, and from the hood 22-1 by the suction fan 24-1. Inhale. The flow until the cold air is sucked is indicated by an arrow Y4.
If it demonstrates further, the ventilation will be performed with respect to the range from the height of the lower half rank of the fin 21a to the ground on the opposite side to the liquid nitrogen inflow side where frost adheres most easily in the fin 21a.

In order to realize this, the hood 22-1 is arranged on the liquid nitrogen inflow side indicated by the arrow Y1a of the evaporator 21-1 and in the vicinity of the lower side, and the nozzle device 25-1 is connected to the evaporator 21-1. It is arranged on the liquid nitrogen discharge side indicated by the arrow Y1b in the vicinity of the lower half.
By operating the pushing fan 26-1 and the suction fan 24-1 arranged in this way by the fan control unit 28, air is blown from the nozzle device 25-1 in the direction of the hood 22-1 indicated by the arrow Y3. The cold air moves in the blowing direction as indicated by the arrow Y4. Further, since the vicinity of the opening of the hood 22-1 is in the suction state by the suction fan 24-1, the moved cold air is efficiently sucked into the hood 22-1 and passes through the duct 23-1 as indicated by an arrow Y5. To the air conditioner 13-1.

As described above, it is possible to efficiently collect the cold air by pushing or sucking the air from the lower portion of the evaporator 21-1 by the fans 26-1 and 24-1. Here, the evaporator 21-1 and this system have been described as representatives, but the same applies to the other evaporators 21-2 and 21-3.
Thus, effective utilization of the heat of vaporization in the vaporization process of each of the evaporators 21-1 to 21-3 can be achieved.
Moreover, since cold air does not generate | occur | produce from the evaporators 21-1 to 21-3 as a mist-like soot around, the view on a road is interrupted conventionally and the safety | security of a pedestrian or a driver | operator may be impaired. Disappear. In other words, it is possible to prevent the danger to the human being caused by the visual field deterioration caused by the soot generated in the vaporization process of the evaporators 21-1 to 21-3.

(2) Pushing and suction fan operation / stop control.
When there are a plurality of evaporators 21-1 to 21-3, all of them are not always operated, and some are stopped. When the evaporators 21-1 to 21-3 are stopped, liquid nitrogen is not flowing into the fins 21a, so that the operation / stopped state can be known by detecting the fin surface temperature.
Therefore, as shown in FIG. 1, the temperature sensors 27-1 to 27-3 are installed at positions where the temperature changes of the evaporators 21-1 to 21-3 are most conspicuous, for example, the lower surface side. The temperature of 1-21-3 is detected and transmitted to the fan control unit 28.

The fan control unit 28 operates the push-in and suction fans 26-1 to 26-3 and 24-1 to 24-3 when the detected temperature is a temperature indicating an operation state (referred to as operation temperature). On the other hand, when the detected temperature becomes higher than the operating temperature during the fan operation, the pushing and suction fans 26-1 to 26-3 and 24-1 to 24-3 are stopped.
As described above, when there are a plurality of evaporators 21-1 to 21-3, by effectively controlling the operation / stop of the evaporators according to the detected temperature, it is possible to effectively use the heat of vaporization without consuming wasteful power consumption. You can plan.
Further, if the pushing and suction fans 26-1 to 26-3, 24-1 to 24-3 are operated at all times or at predetermined time intervals, frost is chronically attached to the fins 21a, resulting in ice-like conditions. It is possible to prevent solidification at an early stage.

  In addition to the above configuration, as shown in FIG. 4, any or all of the liquid nitrogen from the tank (not shown) is supplied to each of the evaporators 21-1 to 21-3 by the selection valve 34 controlled by the valve switching control unit 35. In the case of the configuration of selectively flowing into the evaporators 21-1 to 21-3, fan operation / stop control is performed as follows. That is, the fan control unit 28 performs the operation / stop control of the pushing and suction fans 26-1 to 26-3, 24-1 to 24-3 based on the switching control signal of the valve switching control unit 35. .

For example, when the control of the selection valve 34 for allowing liquid nitrogen to flow only into the first evaporator 21-1 is performed, the fan control unit 28 that has received this control signal performs the pushing and suction fans 26. -Control to drive only 1 and 24-1.
Even with such control, as described above, it is possible to effectively use the vaporized heat without consuming unnecessary power consumption.

(3) Defrosting the evaporator.
As shown in FIG. 2B, each fin 21 a is connected to each fin 21 a by using a running water control device 37 connected to a pipe 36 through which hot water flows and a pipe 38 through which the hot water flows in from a plurality of nozzles 38 a. When frost adheres, or when frost adheres and solidifies into ice, it may be melted and removed.
For this reason, a plurality of nozzles 38a are arranged above each fin 21a so that the hot water falls from these nozzles 38a to each fin 21a.
Thereby, since frost does not adhere to the fins 21a, the heat exchange rate is improved, and the generation of soot as described above can be prevented. Moreover, if hot water is made using the waste heat of the furnace, which is factory equipment, useless energy is not consumed. Further, depending on the outside air temperature, it is possible to dissolve frost and ice with water at room temperature instead of hot water.

(4) Mixing control of recovered cold air and outside air.
As described above, the cold air is collected and introduced into the air conditioners 13-1 to 13-3. At this time, if the amount of the collected cold air is insufficient, the outside air or the circulating air in the factory is prevented so as not to exceed a predetermined temperature. To make the required amount. For this reason, whether or not the outside air can be taken in and the amount of the outside air are determined by calculation based on the outside air taking algorithm, and the recovered cold air and the outside air taken in are appropriately mixed.

In this way, the air conditioning controller 18 performs mixing control. In this case, the enthalpy when each of the enthalpies in the recovered cold air and the outside air (or circulating air) is mixed is calculated by simulation, and the mixing ratio of the recovered cold air and the outside air is determined by comparison with a preset value. And the open / close ratio of the dampers of the air conditioners 13-1 to 13-3 is controlled so that the recovered cold air and the outside air (or circulating air) are introduced and mixed at the mixing ratio.
As a result, the recovered cold air can be effectively used to air-condition the factory 11, so that energy saving in the air-conditioning can be achieved.

(5) Matrix air conditioning duct structure.
As shown in FIG. 1, the matrix air-conditioning duct includes six upper-layer ducts 15-1 to 15-6 arranged in a horizontal and parallel state on the ceiling of the work space of the factory 11, and these upper-layer ducts 15-1. To n-6 middle-layer ducts 16-1 to 16-n arranged in parallel with and perpendicular to the upper-layer duct, that is, in a lattice form above and below, and these middle-layer ducts 16-1 to 16-6 A number of lower ducts 17 are arranged below 16-n so as to reach the entire work space at predetermined intervals.

  More specifically, the upper layer ducts 15-1 to 15-6, the middle layer ducts 16-1 to 16-n, and the lower layer duct 17 are piped into the air conditioners 13-1 to 13-3 in a multi-layered manner in a lattice shape, for example, The upper layer ducts 15-1 to 15-6, which are the uppermost layers directly connected to the air conditioners 13-1 to 13-3, are conveyed through the air supply layer, and the middle layer ducts 16-1 to 16-n as the next layer are conveyed by air. The function was divided by using the lower and lower ducts 17 as blowing layers. That is, the lower duct 17 is provided with one or a plurality of outlets.

  Further, as shown in FIG. 5, the upper ducts 15-1 to 15-6 and the middle ducts 16-1 to 16-n are brought into a ventilation state by a connection duct 31 arranged perpendicular to the orthogonal position of the upper and middle ducts. It is connected. Inside the connection duct 31 is an open / close damper such as a VD (air volume control damper) or MD (motor damper), an air valve such as a CAV (Constant Air Valve) or VAV (Variable Air Valve), or other similar open / close device (hereinafter referred to as these). In general, the damper 32 is incorporated, and the damper 32 can adjust the air volume from the upper ducts 15-1 to 15-6 to the middle ducts 16-1 to 16-n.

The middle ducts 16-1 to 16-n are provided with a large number of openings for inserting and removing the lower duct 17 and the lower duct 17 is attached to the openings. When the lower duct 17 is not attached, the opening is closed with a lid that automatically closes the opening with a spring structure.
By adopting the matrix air-conditioning duct structure in this way, for example, when the air-conditioning demand location is moved or changed due to a change in the production line of the factory 11, the lower duct 17 having the outlet is moved and removed accordingly. Therefore, it can be easily accommodated.

  Therefore, because the outlet is fixed at the time of construction as in the conventional configuration, each time the outlet location is changed, changing the duct system including the outlet will require a large amount of equipment costs, repair costs, etc. Can be eliminated. In other words, it is possible to significantly reduce the cost for changing the duct system accompanying the change of the blowing location. In particular, in the past, the larger the change of the blowout place, the higher the cost. However, in this embodiment, even if the change is large, it can be handled without much cost. can do.

(6) Coordinated operation control of air conditioners.
This cooperative operation control of the air conditioner is performed by the air conditioning control unit 18, and when the above-described change of the blowing location is performed, the plurality of air conditioners 13-1 to 13-3 are selectively operated according to the change of the blowing location. In addition, flexible energy saving control is performed in which the air conditioning load is shared in cooperation with each of the air conditioners 13-1 to 13-3.
The cooperative operation control by the air conditioning control unit 18 will be described in the following steps S1 to S10.
In step S1, it is determined whether the air conditioning conditions have been changed. The air conditioning conditions change due to physical changes in the air-conditioning place such as changes in the production line as described above. In addition to this, whether air-conditioning is required at the air-conditioning target place, such as production line shutdown and work hours. It also changes depending on the state (air conditioning necessity state).

  Therefore, in the present embodiment, the illumination of the production line is turned on / off as means for determining whether or not the air conditioning conditions have been changed. That is, a determination is made in response to an illumination on / off signal from the illumination power source 19. In addition, on / off of the power supply of the production line, manual signal when a person manually performs air conditioning necessity status, timer signal when managing air conditioning necessity status with a timer, signal from temperature and humidity meter, etc. Judgment may be made upon receipt.

In addition, the determination result as to whether or not the air conditioning condition has been changed is indicated using an air conditioning condition change bit.
That is, if the air conditioning condition is changed, the air conditioning condition change bit is changed to “1” in step S2. Further, after calculating the air conditioning energy saving coefficient Ej in step S5 described later, the air conditioning condition change bit is set to “0” in step S2.

When the air conditioning condition change bit is “1”, in step S3, an air conditioning system in an area that needs to be blown out after the air conditioning condition is changed, for example, a coordinate grid of the air conditioning system as shown in FIG. The coordinates indicating the positions of 1-13-3 and the respective dampers 32 are obtained.
That is, the upper layer ducts 15-1 to 15-6 and the middle layer ducts 16-1 to 16-n of the matrix air-conditioning duct structure are regarded as coordinate grids, and the positions of the air conditioners 13-1 to 13-3 are shown from the intersections. The coordinates and coordinates indicating the position of the damper 32 provided in the connection duct 31 are obtained.

However, for air conditioning systems that need to be blown out after changing the air conditioning conditions, for example, an illumination on / off signal is associated with an area that can be identified by the on / off of this signal to form a coordinate grid for the air conditioning system only in the on area. To do.
Since the damper 32 exists at the intersection of the upper ducts 15-1 to 15-6 and the middle ducts 16-1 to 16-n, the upper ducts 15-1 to 15-6 are arranged as shown in FIG. The straight lines in the direction and the middle-layer ducts 16-1 to 16-7 are represented by straight lines in the row direction, and the intersections thereof are coordinates indicating the position of the damper 32.

  In the case of this example, the intersection of the upper-layer duct 15-1 in the first row and the middle-layer duct 16-1 in the first row is represented by coordinates (1, 1), and the upper-layer duct 15-1 in the first row and the middle layer in the second column. The intersection point with the duct 16-2 is coordinate (1,2), and the intersection point between the upper-layer duct 15-1 in the first row and the middle-layer duct 16-3 in the third row is the coordinate (1,3), the upper layer in the first row. The intersection of the duct 15-1 and the middle-tier duct 16-4 in the fourth row is represented by coordinates (1, 4),... The intersection of the upper-tier duct 15-1 in the first row and the middle-tier duct 16-n in the n-th row It was set as a coordinate (1, n).

  In addition, the intersection of the second-row upper-layer duct 15-2 and the first-row middle-layer duct 16-1 is represented by coordinates (2, 1), the second-row upper-layer duct 15-2 and the second-row middle-layer duct 16- 2 is the coordinate (2, 2), and the intersection of the second row of the upper duct 15-2 and the third row of the middle duct 16-3 is the coordinate (2, 3) of the second row of the upper duct 15- The intersection of the second and fourth rows of the middle-layer duct 16-4 is coordinate (2, 4),... The intersection of the second-row upper-layer duct 15-2 and the n-th row of middle-layer duct 16-n is coordinate (2 , N). In addition, in the upper-layer ducts 15-3 to 15-6 in the third to sixth rows, the intersections with the middle-layer ducts 16-1 to 16-n are set as the position coordinates of the damper 32. If numbers are assigned to the dampers 32 (represented by the symbol DA) in order from the first row, the coordinates of the i-th damper DA (i) are (xi, yi).

  The position coordinates of the air conditioners 13-1 to 13-3 are determined at the intersections if the air conditioners 13-1 to 13-3 are located at the above intersections. The intersections of the upper ducts 15-1 to 15-6 and the middle ducts 16-1 to 16-n that are closest to -1 to 13-3 are coordinates. In this example, there are three air conditioners 13-1 to 13-3, but when there are more than this, if the air conditioners (represented by the symbol AH) are numbered sequentially, the j-th air conditioner AH (j) The coordinates are (Xj, Yj).

Next, in step S4, the required air volume of the air conditioning system is calculated. In this calculation, first, the required air volume in each damper 32 is calculated, and these are added to calculate the total required air volume in the air conditioning system.
For example, the number of outlets in the production line is determined to be 10 or the like, and the air volume for this number is the required air volume for each damper 32. The required air volume Qi of one damper DA (i) is expressed by the following equation (1).
Qi = ki × Qi_max (1)
However, ki: damper opening coefficient, Qi_max: maximum air volume.

The relationship between the damper opening coefficient ki and the maximum air volume Qi_max leads to a relationship in which, for example, the damper opening is set to 70% in order to cover the air volume of 10 outlets. In addition, it has been found that when the air is blown from the air conditioner, it is most efficient to blow to the nearest outlet with the maximum air volume Qi_max, and it is inefficient to blow to the far outlet.
After calculating the required air volume Qi of one damper DA (i), the total required air volume Q_total in the air conditioning system is calculated by Q_total = ΣQi.

Next, in step S5, an air conditioning energy saving coefficient Ej in each air conditioner AH (j) is calculated from the following equation (2).
The air-conditioning energy-saving coefficient Ej is a coefficient that serves as an index for operating a plurality of air-conditioners in an energy-saving manner as much as possible. The distance from the air-conditioner to the damper (air-conditioning) calculated by the following equation (3) The distance between the machine dampers (Pi, j) increases as the required air volume Qi increases.

Ej = Σ (m × a × Pmin / Pi, j + n × b × Qi / Qmax) (2)
m: distance weight coefficient, n: air volume weight coefficient.
Pmin is the minimum distance of the air conditioning system, and Pmin = MIN (Pi, j).
Qmax is the maximum air volume of the air conditioning system, and Qmax = MAX (Qi_max).
a, b: correction coefficients (normally, both a and b are set to 1).
Pi, j is the distance between the air conditioner dampers, and the distance Pi, j between the air conditioner dampers of AH (j) and DA (i) is obtained from the following equation (3).
Pi, j = ABS (Xj-xi) + ABS (Yj-yi) (3)
However, ABS: a function for obtaining an absolute value.

  Further, m and n are set so that m + n = 1, and how to determine these coefficients is determined in consideration of balance. The reason for this will be explained. The relationship between the required air volume Qi and the distance between the air conditioner dampers Pi, j is 1: 1, but this is not necessarily the case because of a loss such as air leakage from the duct. Therefore, coefficients m and n in the air volume Qi and the distance Pi, j for adjusting the error are required.

Next, in step S6, priority is given to each air conditioner when operating each air conditioner. This assigns priorities such that the higher the air conditioning energy saving coefficient Ej calculated as described above, the higher the priority. Those having the same air-conditioning energy saving coefficient Ej are given high priority when the air-conditioning capacity is small.
Next, in step S7, control conditions for the plurality of air conditioners 13-1 to 13-3 capable of supplying the total required air volume Q_total for which the air conditioning area has been determined are determined. This is a control condition for cooperative operation while maintaining a predetermined static pressure when the plurality of air conditioners 13-1 to 13-3 are simultaneously operated so that the total required air volume Q_total can be supplied.

More specifically, since it is known in advance for each air conditioner that the required static pressure-air volume when the inverter is operated in accordance with the inverter control depends on the parameter for the required static pressure-air volume (necessary static pressure- Each air conditioner is inverter-controlled so that the air volume is the same.
The relationship between the air volume and power is a cube relationship. In order to lower the power, it is better to reduce the air volume, and it is more efficient to reduce the air volume and blow air with a plurality of units. In other words, it is more efficient to cover a certain air volume with a plurality of units than to cover with a single unit. Conventionally, for example, all five units are operated and inverter controlled, but in order to increase efficiency by operating these three units, determine how many units should be operated under what control conditions To do.

  When determining the control conditions, first, the function of the static pressure-air volume of the fans of the air conditioners 13-1 to 13-3 is determined. When making this decision, refer to the function of static pressure-air volume in the specifications of the air conditioner fan, determine the function and various parameters while taking into account the aging of the air conditioner and other conditions, and use this as the static pressure of the air conditioner fan. -It is defined as an airflow function. In setting the static pressure-air volume function, it is assumed that data from an experiment of static pressure-air volume in an actual machine is taken into consideration.

  Next, let Q_supply be the amount of air that can be supplied while balancing the static pressure for the air conditioners 13-1 and 13-2 having the priorities 1 and 2 described above, and derive the condition of Q_total <Q_supply in order from the highest static pressure. . However, if the air volume is not satisfied even after calculating to the lowest frequency of the air conditioner, calculate until the solution is obtained because the air conditioners of the next priority 3, 4,. repeat. The solution finally obtained is used as a control condition.

In other words, the total required air volume Q_supply when the static pressures of the top two air conditioners 13-1 and 13-2 having a large air conditioning energy saving coefficient Ej are balanced is the total required air volume Q_total that is the required air volume of the entire required duct system. If these can be covered, the air conditioners 13-1 and 13-2 are used. If the total required air volume Q_total cannot be met, the third, fourth,... Are used.
If the total required air volume Q_total cannot be covered, it may be lowered until the static pressure of each air conditioner can be covered. If this is not possible, use the third, fourth, ... as described above.

Next, in step S8, the energy consumption amount when the plurality of air conditioners 13-1 and 13-2 are operated under the determined control conditions is predicted by simulation.
In step S9, the plurality of air conditioners 13-1 and 13-2 are actually operated according to the determined control conditions. The energy consumption at this time is measured.

In step S10, the predicted energy consumption is compared with the actual energy consumption, and the difference between the predicted energy value and the actual measured value is calculated using an arithmetic processing unit such as a neural network, and the air conditioning energy saving coefficient Ej is calculated. This is reflected in the correction of the coefficients a and b in (2). This makes it possible to obtain a more appropriate air conditioning energy saving coefficient Ej.
Further, in the actual cooperative operation control of the plurality of air conditioners 13-1 and 13-2, when the air conditioning energy saving coefficient Ej converges in the processing loop of steps S1 to S10, the actual operation of step S9 is performed using this Ej. To do.

According to this embodiment the air-conditioning system 10, as described above, it is possible to reduce the cost of the ducting changes due to balloon location change of plant 11, also optimum for all regions to be air conditioned Energy saving can be achieved.

It is a figure which shows the structure of the air conditioning system which concerns on embodiment of this invention. The structure of the fin part of the evaporator in the air conditioning system of the said embodiment is shown, (a) is a top view, (b) is a side view. It is a figure which shows the structural equipment arrange | positioned outside the factory in the air conditioning system of the said embodiment. It is a figure which shows the structure in case the inflowing liquid nitrogen to each evaporator is valve | bulb switching selection control in the air conditioning system of the said embodiment. It is a perspective view which shows the structure of the matrix air conditioning duct in the air conditioning system of the said embodiment. It is a figure which shows the coordinate grid of an air conditioning system. It is a flowchart for demonstrating cooperation operation control of the some air conditioning machine in the air conditioning system of the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air conditioning system 11 Factory 13-1 to 13-3 Air conditioner 15-1 to 15-6 Upper layer duct 16-1 to 16-n Middle layer duct 17 Lower layer duct 18 Air conditioning control part 19 Illumination power supply 21-1 to 21-3 Evaporation 21a Fin 21b Pedestal 21c, 36, 38 Piping 22-1 to 22-3 Hood 23-1 to 23-3 Duct 24-1 to 24-3 Suction fan 25-1 to 25-3 Nozzle device 26-1 to 26 -3 Pushing fan 27-1 to 27-3 Temperature sensor 28 Fan control unit 31 Connection duct 32 Damper 34 Selection valve 35 Valve switching control unit 37 Flowing water control device 38a Nozzle

Claims (3)

1 in an air conditioning system for the air conditioning of the area by installing the outlet of the air duct is extended is blower opening or al min Toki multiple air conditioners in the air-conditioned area,
The ducts are arranged with a plurality of upper layer ducts connected to the air outlet of the air conditioner, and at a predetermined interval below the upper layer ducts so as to intersect with the upper layer ducts in a lattice shape. A plurality of middle-layer ducts, a damper for adjusting airflow, and a plurality of connection ducts for connecting the upper-layer duct and the middle-layer duct at the intersecting portion, and one or a plurality of outlets, are provided in the middle-layer duct. air conditioning system characterized by being a plurality of bottom layer duct removably attached to closable opening has a matrix conditioning duct made of. Of the matrix air-conditioning ducts, the intersection of the upper layer and middle-layer ducts fixed in a grid pattern is regarded as the position coordinate of the damper, and if the air conditioner is located at the intersection, the corresponding intersection must be located. For example, the closest intersection to the air conditioner is regarded as the position coordinate of the air conditioner, and the distance between each damper located in the air conditioning target area that requires air conditioning and the air conditioner connected to the duct incorporating the damper is the position of both obtains each request air volume of the dampers together respectively obtained from the coordinates, obtains a factor proportional to the required air volume as well as inversely proportional to the distance which is thus determined for each air conditioner, rank, the higher the the obtained coefficient is large The air conditioners are prioritized as described above, and a plurality of air conditioners that can supply the total required air volume in the air-conditioning target area that requires air conditioning with the total air volume when the static pressures are balanced with each other are in accordance with the priorities. Air conditioning system of claim 1, selected, characterized in that it comprises an air conditioning control means for operating the selected plurality of air conditioners Te.   The air-conditioning control means predicts the total required air volume of the air-conditioning target area that requires air-conditioning by simulation according to the operation control conditions of a plurality of air conditioners that can be supplied with the total air volume when the static pressures are balanced with each other. The air conditioning system according to claim 2, wherein control is performed to reflect the difference between the predicted energy consumption and the actual energy consumption during operation under the same operation control condition in the coefficient.

Images