JP7167081B2 - air supply system - Google Patents

Description

An air supply system that uses ducts to distribute the air supplied to target spaces such as rooms in a building.

Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2001-304614) discloses an air conditioning system including an air conditioner main body having a heat exchange coil and a fan unit having a fan for blowing heat-exchanged air. Each fan unit of Patent Document 1 is connected to a plurality of air outlets via ducts, and distributes air heat-exchanged in one air conditioner body to the plurality of air outlets to supply air to an air conditioning zone.

The controller of Patent Literature 1 controls the rotation speed of the pump motor of the pump unit that can adjust the flow rate of the heat medium from the heat source to the heat exchange coil, and the fan motors of the plurality of fan units. A plurality of air outlets are provided with sensors, and the controller controls the air volume of each fan and the heat medium flow rate of the heat exchange coil according to the fluctuation of the total numerical value of the air volume signals of the sensors.

In the fan unit described in Patent Document 1, one controller provided outside the plurality of fan units controls the rotational speeds of the fan motors of the plurality of fan units. The controller of Patent Document 1 controls the rotation speed of the fan motor of each fan unit while confirming the blown air volume signals of the plurality of sensors provided at the plurality of outlets of each fan unit. Therefore, the control load of the controller of Patent Document 1 becomes large.

An air supply system including a fan unit capable of controlling the air volume has a problem of reducing the control load.

The air supply system of the first aspect includes a first unit, a second unit, a duct, a first detector, and a first controller. The first unit has a first fan. The second unit has a second fan that supplies the first air to the target space. A duct conveys the first air delivered by the first fan from the first unit to the second unit. The first detector detects information about the second air in the target space. The first controller communicates with the second unit and the first detector. The second unit includes a second detector that detects the amount of air blown by the second fan, and a second controller that controls the rotation speed of the second fan. The first controller determines the target air volume of the second unit based on the information on the second air acquired from the first detector, and instructs the second controller of the target air volume. The second controller controls the rotational speed of the second fan so that the air volume detected by the second detection unit reaches the target air volume.

In the air supply system of the first aspect, the second unit receives the indicated value of the air volume from the first controller, and automatically controls the air volume by the second controller itself without depending on the first controller. be able to. It is only necessary to give an appropriate air volume instruction value from the first controller to the second unit, and the control load of the first controller can be reduced.

The air supply system of the second aspect is the system of the first aspect, wherein the first unit has a heat exchanger through which a heat medium flows. The heat exchanger exchanges heat between the first air delivered by the first fan and the heat medium.

In the air supply system of the second aspect, the first unit can exchange heat with the heat medium in the heat exchanger and send the conditioned first air to the second unit. The second unit can air-condition the target space using this conditioned first air.

The air supply system of the third aspect is the system of the second aspect, wherein the first detection unit is a temperature sensor, a CO ₂ concentration sensor or a humidity sensor, and the first controller is a preset target space setting A target air volume for the second unit is determined based on the temperature, the set _CO2 concentration or the set humidity, and the value detected by the first detector.

In the air supply system of the third aspect, the first controller controls the air volume of the second unit according to the target air volume so as to keep at least one of the temperature, humidity and CO ₂ concentration of the target space within an appropriate range. can be controlled to

The air supply system of the fourth aspect is the system of any one of the first aspect to the third aspect, is arranged downstream of the first unit, and detects the pressure of the first air delivered by the first fan. A third detector is further provided. The first controller controls the number of rotations of the first fan so that the pressure value obtained from the third detector falls within a predetermined range.

In the air supply system of the fourth aspect, when the pressure value on the downstream side of the first unit falls within the predetermined range, compared to the case where the pressure value on the downstream side of the first unit deviates from the predetermined range, the second Excess power consumption generated by the first fan and the second fan can be saved.

An air supply system according to a fifth aspect is the system according to any one of the first aspect to the fourth aspect, and includes a plurality of second units. A duct conveys primary air delivered by the primary fan from the primary unit to the plurality of secondary units. A plurality of first detection units are provided corresponding to each of the plurality of second units. The first controller determines a plurality of target air volumes for the plurality of second units based on information on the second air in the target space obtained from the plurality of first detection units, and instructs each of the second controllers to set each target air volume. .

In the air supply system of the fifth aspect, the first controller can control the output of the first fan according to the amount of the first air supplied by the plurality of second fans. Thereby, the air supply system can suppress power consumption.

The air supply system of the sixth aspect is the system of the fifth aspect, wherein the first controller controls the operating state of at least one second fan among the plurality of second fans or the operating state of the plurality of second fans. When changing the air volume of at least one second fan, priority is given to increasing the output of the fan with high fan efficiency among the first fan and the plurality of second fans, or reducing the output of the fan with low fan efficiency. give priority to

In the air supply system of the sixth aspect, the first controller preferentially increases the output of the fan with high fan efficiency among the first fan and the plurality of second fans, or reduces the output of the fan with low fan efficiency. Control. This reduces the energy consumption of the air supply system.

The air supply system of the seventh aspect is the system of the sixth aspect, wherein the first controller controls the processing static pressure of the highest fan efficiency among the plurality of second fans to be constant or the plurality of second fans. The output of the first fan is determined so that the fan efficiency of the two fans is the highest and the fan speed is maximized.

In the air supply system of the seventh aspect, the first controller controls the processing static pressure of the highest fan efficiency among the plurality of second fans to be constant, or the fan efficiency among the plurality of second fans is the highest. The output of the first fan is determined so that the highest fan speed is maximized. As a result, the output of the second fan with low fan efficiency can be preferentially reduced.

The air supply system of the eighth aspect is the system of the sixth aspect, wherein the first controller controls the processing static pressure of the lowest fan efficiency among the plurality of second fans to be constant or the plurality of second fans. The output of the first fan is determined so that the number of revolutions of the fan with the lowest fan efficiency among the two fans is minimized.

In the air supply system of the eighth aspect, the first controller controls the processing static pressure of the lowest fan efficiency among the plurality of second fans to be constant, or the fan efficiency among the plurality of second fans is the highest. The output of the first fan is determined so that the low fan speed is minimized. As a result, the output of the fan with high fan efficiency can be preferentially increased.

The air supply system of the ninth aspect is the system of the seventh or eighth aspect, comprising a plurality of differential pressure sensors for sensing process static pressures of the plurality of second fans, the controller comprising a plurality of differential pressure sensors. The output of the first fan is determined based on the detected value of the pressure sensor.

The air supply system according to the tenth aspect is the system according to the seventh aspect or the eighth aspect, wherein the first controller controls the air volume of the fan with the highest fan efficiency among the plurality of second fans when the air volume does not reach the target air volume. , to increase the output of the first fan.

In the air supply system of the tenth aspect, the first controller increases the output of the first fan and controls the air volume of the fan with the highest fan efficiency among the plurality of second fans to reach the target air volume. can.

An air supply system according to an eleventh aspect is the system according to any one of the sixth to tenth aspects, further comprising a fourth detector for detecting the air volume of the first air sent out by the first fan. A first controller uses at least one of the plurality of second detectors and the fourth detectors to compare the fan efficiency of the first fan and the plurality of second fans.

The conceptual diagram which shows the structure of the air supply system which concerns on embodiment. The conceptual diagram which shows an example of a structure of the air supply system which concerns on a modification. FIG. 2 is a block diagram for explaining the configuration of a controller; The conceptual diagram which shows the other example of a structure of the air supply system which concerns on a modification. The conceptual diagram which shows the other example of a structure of the air supply system which concerns on a modification. The conceptual diagram which shows the other example of a structure of the air supply system which concerns on a modification. FIG. 7 is a block diagram for explaining the configuration of the controller shown in FIG. 6; FIG.

(1) Overall Configuration The air supply system 10 shown in FIG. 1 includes a first unit 20, a second unit 30, a duct 40, and a controller 50. The first unit 20 has a first fan 21 . Each of the plurality of second units 30 has a second fan 31 . Each second fan 31 supplies air from the second unit 30 to the target space 100 . The target space 100 is, for example, a room in a building. A room is, for example, a space in which air movement is restricted by floors, ceilings and walls. A plurality of second units 30 are arranged for one or more target spaces 100 . FIG. 1 shows an example in which the air supply system 10 including two second units 30 is arranged for one target space 100 as a representative example of the air supply system 10 including a plurality of second units 30. It is shown. The number of second units 30 may be three or more, and is set as appropriate. As mentioned above, there may be two or more target spaces 100 in which the second units 30 are arranged.

The duct 40 distributes the first air SA delivered from the first unit 20 by the first fan 21 to the plurality of second units 30 . The duct 40 includes a main pipe 41 and branch pipes 42 branched from the main pipe 41 . Although FIG. 1 shows the case where the main pipe 41 is arranged outside the first unit 20 , the main pipe 41 may be arranged inside the first unit 20 or inside the first unit 20 . It may be arranged to extend from the inside to the outside of the first unit 20 . The main pipe 41 includes a case where a part of the casing of the first unit 20 functions as the main pipe 41 when it is arranged inside the first unit 20 . FIG. 1 shows an example in which the inlet 41 a of the main pipe 41 is connected to the first unit 20 . The first fan 21 is arranged inside the first unit 20 . Here, all the air blown from the first fan 21 is configured to flow into the duct 40 .

An outlet 41 b of the main pipe 41 of the duct 40 is connected to an inlet 42 a of the branch pipe 42 . A plurality of outlets 42 b of the branch pipe 42 are connected to a plurality of second units 30 .

Each second unit 30 and the target space 100 are connected by a ventilation passage 81 . An inlet 81 a of the ventilation passage 81 is connected to the second unit 30 . Each second fan 31 generates an airflow from the outlet 42b of the duct 40 toward the inlet 81a of the ventilation passage 81 in the second unit 30 . Viewed from another point of view, each second fan 31 sucks the first air SA from the outlet 42 b of the branch pipe 42 . Each second fan 31 can change the static pressure inside each second unit 30 (before the entrance 81a of the ventilation passage 81) by changing the rotation speed. Assuming that the static pressure of the duct 40 is constant, each second fan 31 raises the static pressure inside each second unit 30 (before the entrance 81a of the ventilation passage 81) by increasing the rotation speed. be able to. As the static pressure in the second unit 30 increases, the amount of the first air SA flowing through the ventilation passage 81 increases. By changing the amount of flowing air in this way, the amount of air supplied to the target space 100 from the outlet 81b of each ventilation passage 81 changes.

The controller 50 includes a main controller 51 and multiple sub-controllers 52 . A controller 50 is configured by connecting a main controller 51 and a plurality of sub-controllers 52 to each other. The main controller 51 controls the rotation speed of the first fan 21 . In other words, the main controller 51 controls the output of the first fan 21 . As the output of the first fan 21 increases, the state of the first fan 21 changes so that the amount of air blown by the first fan 21 increases.

One sub-controller 52 is provided for each second unit 30 . Each sub-controller 52 issues an instruction regarding air volume change to the corresponding second fan 31 . Each sub-controller 52 stores a target air volume. Each sub-controller 52 issues an instruction to increase the number of revolutions of the second fan 31 (instruction on changing the air volume) if the air supply air volume is insufficient for the target air volume. Conversely, the sub-controller 52 issues an instruction to decrease the rotational speed of the second fan 31 (instruction on changing the air volume) if the air supply air volume is excessive with respect to the target air volume.

The controller 50 obtains information on the amount of air supplied to the target space 100 by the plurality of second fans 31 . The information on the amount of air is, for example, the amount of air to be supplied to the target space 100 per second. The required output of the first fan 21 is determined based on the obtained information on the amount of air. The controller 50 controls the output of the first fan 21 so as to achieve the determined required output. Specifically, each sub-controller 52 obtains information on the amount of air in the second unit 30 from the corresponding second unit 30 . Each sub-controller 52 outputs information on the amount of air to the main controller 51 .

(2) Detailed configuration (2-1) First unit 20
The first unit 20 has a heat exchanger 22 , a fourth detector 23 , a temperature sensor 24 and a water volume control valve 25 in addition to the already explained first fan 21 . Cold water or hot water, for example, is supplied from the heat source unit 60 to the heat exchanger 22 as a heat medium. The heat medium supplied to the heat exchanger 22 may be something other than cold or hot water, such as brine. For example, an air volume sensor, an air velocity sensor, or a differential pressure sensor can be used for the fourth detection unit 23 .

The fourth detector 23 detects the amount of air blown by the first fan 21 . The fourth detector 23 is connected to the main controller 51 . The air volume value detected by the fourth detector 23 is transmitted from the fourth detector 23 to the main controller 51 . The air volume detected by the fourth detection unit 23 is the air volume flowing through the main pipe 41 of the duct 40 . In other words, the air volume detected by the fourth detection unit 23 is the total volume of air supplied to the target space 100 from the plurality of second units 30 .

A temperature sensor 24 detects the temperature of the first air SA sent from the first fan 21 to the duct 40 . The temperature sensor 24 is connected to the main controller 51 . The temperature value detected by the temperature sensor 24 is transmitted from the temperature sensor 24 to the main controller 51 .

The first unit 20 is connected to the target space 100 via the ventilation passage 82 . The second air RA that has returned from the target space 100 through the ventilation passage 82 is sent out to the duct 40 through the heat exchanger 22 by the first fan 21 . This second air RA returned from the target space 100 is the air that was in the target space 100 . When passing through the heat exchanger 22, the returning second air RA exchanges heat with cold or hot water flowing through the heat exchanger 22 to become conditioned air. The amount of heat given to the first air SA which is heat-exchanged by the heat exchanger 22 and sent out to the duct 40 is adjusted by the water quantity control valve 25 . The degree of opening of the water volume control valve 25 is controlled by the main controller 51 . As the degree of opening of the water amount adjustment valve 25 increases, the amount of water flowing through the heat exchanger 22 increases, and the amount of heat exchanged between the heat exchanger 22 and the first air SA per unit time increases. Conversely, if the degree of opening of the water volume control valve 25 is decreased, the volume of water flowing through the heat exchanger 22 is decreased, and the amount of heat exchanged between the heat exchanger 22 and the first air SA per unit time is decreased.

(2-2) Second unit 30
The second unit 30 has a second detector 32 in addition to the already-described second fan 31 . The second detector 32 detects the amount of air blown by the second fan 31 . Each second detector 32 is connected to one corresponding sub-controller 52 . The air volume value detected by the second detection unit 32 is transmitted to the sub-controller 52 . The air volume detected by the second detection unit 32 is the air volume flowing through the ventilation passage 81 . In other words, the amount of air detected by the second detection unit 32 is the amount of supplied air supplied from each second unit 30 to the target space 100 . For example, an air volume sensor, an air velocity sensor, or a differential pressure sensor can be used for the second detection unit 32 .

(2-3) Remote sensor 70
The multiple remote sensors 70 have the function of temperature sensors. Each remote sensor 70 is configured to transmit data indicating the temperature of the second air RA in the target space 100 to the corresponding sub-controller 52 .

(3) Operation of Air Supply System 10 Each of the plurality of sub-controllers 52 receives the value of the detected temperature of the target space from the connected remote sensor 70 . Each sub-controller 52 holds data indicating the set temperature. For example, data indicating the set temperature is transmitted in advance to each sub-controller 52 from a remote controller (not shown) or the like. Each sub-controller 52 stores data indicating the set temperature received from a remote controller or the like in a storage device 52b (see FIG. 3) such as a built-in memory. Each sub-controller 52 transmits the set temperature value to the main controller 51 . The main controller 51 determines the target air volume of each second unit 30 according to the temperature of the second air RA detected by the corresponding remote sensor 70 based on the set temperature. The main controller 51 transmits the value of the target air volume to each sub-controller 52 .

The main controller 51 determines the output of the first fan 21 according to the target total amount of air to be supplied to the target space 100 .

For example, the static pressure at the outlet 41b of the main pipe 41 (the inlet 42a of the branch pipe 42) takes an intermediate value between the static pressure at the inlet 41a of the main pipe 41 and the static pressure at the outlet 42b of the branch pipe 42. In comparison with the case of taking a large value, the ratio of the output of the first fan 21 becomes larger than the ratio of the outputs of the plurality of second fans 31 when the value is larger than the intermediate value. Conversely, comparing the case where the static pressure at the outlet 41b of the main pipe 41 (the inlet 42a of the branch pipe 42) takes the intermediate value and the case where the static pressure takes a smaller value than the intermediate value, the case where the static pressure takes a smaller value , the output ratio of the first fan 21 is smaller than the output ratio of the plurality of second fans 31 . The ratio of the output of the first fan 21 to the output of the plurality of second fans 31 has an efficient range. Therefore, the main controller 51 determines the output of the first fan 21 so as to achieve an efficient ratio. In other words, the main controller 51 determines the output of the first fan 21 to be a predetermined appropriate output for the total target air volume.

For example, considering the following method of determining the output of the first fan 21, it can be seen that there is a range of output of the first fan 21 suitable for reducing power consumption. If the total power consumption of the first fan 21 and the plurality of second fans 31 increases by increasing the output of the first fan 21, the output of the first fan 21 is gradually decreased to increase the power consumption of the first fan 21 and the plurality of second fans. If the output of the first fan 21 is determined before the total power consumption of the two fans 31 begins to rise again, the determined range of the output will be a range in which the power consumption is smaller than the other ranges. Conversely, if the total power consumption of the first fan 21 and the plurality of second fans 31 is increased by decreasing the output of the first fan 21, the output of the first fan 21 is gradually increased to If the output of the first fan 21 before the total power consumption of the plurality of second fans 31 begins to rise again, the determined range of the output will be a range in which the power consumption is smaller than the other ranges. If the output of the first fan 21 is increased and the total power consumption of the first fan 21 and the plurality of second fans 31 is decreased, the output of the first fan 21 is gradually increased to increase the output of the first fan 21 and the plurality of second fans. If the output of the first fan 21 is determined before the total power consumption of the two fans 31 begins to rise again, the determined range of the output will be a range in which the power consumption is smaller than the other ranges. Conversely, if the total power consumption of the first fan 21 and the plurality of second fans 31 is reduced by reducing the output of the first fan 21, the output of the first fan 21 is gradually reduced to If the output of the first fan 21 before the total power consumption of the plurality of second fans 31 begins to rise again, the determined range of the output will be a range in which the power consumption is smaller than the other ranges. However, determining the appropriate output of the first fan 21 is not limited to this method.

After the main controller 51 determines the target air volume and transmits the value of the target air volume to each sub-controller 52, each second unit 30 other than the second unit 30 with the highest fan efficiency is controlled by the corresponding sub-controller 52 to the second air volume. The rotation speed of the fan 31 is adjusted. The adjustment of the rotation speeds of the plurality of second fans 31 is performed independently of each other.
At this time, the rotational speed of the second fan 31 of the second unit 30 having the highest fan efficiency is the maximum at the determined output of the first fan 21 . Here, the second unit 30 with the highest fan efficiency is the second unit 30 with the lowest energy consumption when the static pressure at the inlet 42a of the branch pipe 42 is the same and the amount of supplied air supplied to the target space 100 is the same. be. In addition, the second unit 30 with the lowest fan efficiency is the second unit 30 with the highest energy consumption when the static pressure at the inlet 42a of the branch pipe 42 is the same and the amount of supplied air supplied to the target space 100 is the same. .

Each sub-controller 52 controls the number of revolutions of each second fan 31 so that the amount of supplied air coincides with the target amount of air. The multiple sub-controllers 52 control the rotation speeds of the multiple second fans 31 independently of each other. Each sub-controller 52 increases the rotation speed of each second fan 31 if the air volume detected by the second detection unit 32 is smaller than the target air volume. Each sub-controller 52 reduces the rotation speed of each second fan 31 if the air volume detected by the second detection unit 32 is greater than the target air volume. If the rotation speed of the second unit 30 with the highest fan efficiency drops, the main controller 51 changes the output of the first fan 21 to maximize the rotation speed of the second unit 30 with the highest fan efficiency. Adjust so that

When changing the air volume, the main controller 51 changes the operating state of at least one second fan among the plurality of second fans 31 or the air volume of at least one second fan 31 among the plurality of second fans 31. is changed, priority is given to increasing the output of the fan with high fan efficiency among the first fan 21 and the plurality of second fans 31, or to decreasing the output of the fan with low fan efficiency. In other words, when increasing the amount of air supplied to the target space 100, the main controller 51 increases the output of the fan with high fan efficiency among the first fan 21 and the plurality of second fans 31. The output of one fan 21 and the target air volume of the plurality of second units 30 are determined. Conversely, when reducing the amount of air supplied to the target space 100, the main controller 51 reduces the output of the fan with high fan efficiency among the first fan 21 and the plurality of second fans 31. The output of one fan 21 and the target air volume of the plurality of second units 30 are determined.

However, the main controller 51 increases the output of the first fan 21 when the air volume of the one with the highest fan efficiency among the plurality of second units 30 does not reach the target air volume. At this time, the main controller 51 increases the output of the first fan 21 and keeps the rotation speed of the second fan 31 of the second unit 30 having the maximum fan efficiency at the maximum.

(4) Modification (4-1) Modification 1A
In the above-described embodiment, when the main controller 51 determines the output of the first fan 21, the main controller 51 determines such that the fan efficiency of the plurality of second fans 31 with the highest fan speed is maximized. explained the case.

However, when the main controller 51 determines the output of the first fan 21, the main controller 51 determines the output of the first fan 21 so that the fan efficiency of the plurality of second fans 31 with the lowest fan efficiency is minimized. may be configured to determine the output of In this case, the sub-controller 52 corresponding to each second unit 30 other than the second unit 30 having the lowest fan efficiency adjusts the rotational speed of the second fan 31 . The adjustment of the rotation speeds of the plurality of second fans 31 is performed independently of each other.

Further, when the main controller 51 reduces the target air volume, the main controller 51 reduces the output of the first fan 21 so that the processing static pressure of the one with the highest fan efficiency among the plurality of second fans 31 is constant. It may be a configuration that determines. In this configuration, the second unit 30 having a constant processing static pressure among the second units 30 can keep the rotation speed of the second fan 31, which is more efficient than the others, at a high speed. The efficiency of the air system 10 as a whole can be kept high. In this way, when adopting a configuration in which the processing static pressure is kept constant, for example, each second unit 30 has a differential pressure sensor 33 (see FIG. 2) for detecting the processing static pressure of the second fan 31. is configured to include Alternatively, the controller 50 is configured to calculate the processing static pressure from the detection result of the second detection unit 32 and the rotation speed of the second fan 31 . The controller 50 determines the output of the first fan 21 based on the detection value of the differential pressure sensor 33 of the second unit 30 with the highest fan efficiency. In this case, the corresponding sub-controller 52 adjusts the rotational speed of the second fan 31 in each of the second units 30 other than the second unit 30 whose processing differential pressure is kept constant. The adjustment of the rotation speeds of the plurality of second fans 31 is performed independently of each other.

Further, when the main controller 51 increases the target air volume, the main controller 51 increases the output of the first fan 21 so that the processing static pressure of the fan with the lowest fan efficiency among the plurality of second fans 31 is constant. It may be a configuration that determines. In this configuration, the second unit 30 having a constant processing static pressure among the second units 30 can keep the rotation speed of the second fan 31 having a lower efficiency than the other units low. The efficiency of the air system 10 as a whole can be kept high. In this way, when adopting a configuration in which the processing static pressure is kept constant, for example, each second unit 30 has a differential pressure sensor 33 (see FIG. 2) for detecting the processing static pressure of the second fan 31. is configured to include Alternatively, the controller 50 is configured to calculate the processing static pressure from the detection result of the second detection unit 32 and the rotation speed of the second fan 31 . The controller 50 determines the output of the first fan 21 based on the detection value of the differential pressure sensor 33 of the second unit 30 with the lowest fan efficiency. In this case, the corresponding sub-controller 52 adjusts the rotational speed of the second fan 31 in each of the second units 30 other than the second unit 30 whose processing differential pressure is kept constant. The adjustment of the rotation speeds of the plurality of second fans 31 is performed independently of each other.

(4-2) Modification 1B
Although the remote sensor 70 has a temperature sensor in the above embodiment, the remote sensor 70 may have at least one function of a temperature sensor, a CO ₂ concentration sensor, and a humidity sensor. . When configured in this manner, each of the plurality of sub-controllers 52 receives at least one sensed value of the temperature, CO ₂ concentration, and humidity of the target space 100 from the connected remote sensor 70 . Each sub-controller 52 holds data of set values for detection targets of the remote sensor 70 . Each sub-controller 52 sends the set value of at least one of these temperature, CO ₂ concentration and humidity to the main controller 51 . The main controller 51 determines the target air volume of each second unit 30 according to the detection value of the corresponding remote sensor 70 based on the set value. The main controller 51 transmits the value of the target air volume to each sub-controller 52 .

(4-3) Modification 1C
In the above embodiment, the case where the first unit 20 has the heat exchanger 22 has been described. However, the first unit 20 can also take a form that does not constitute the heat exchanger 22 . The air supply system 10 may be configured, for example, as a system for ventilating the target space 100 when the CO ₂ concentration in the target space 100 is high.

(4-4) Modification 1D
The controller 50 is implemented by a computer. The controller 50 includes control arithmetic devices 51a and 52a and storage devices 51b and 52b. Processors such as CPUs or GPUs can be used for the control arithmetic units 51a and 52a. The control arithmetic devices 51a and 52a read programs stored in the storage devices 51b and 52b, and perform predetermined image processing and arithmetic processing according to the programs. Furthermore, the control arithmetic units 51a and 52a can write the arithmetic results into the storage units 51b and 52b and read the information stored in the storage units 51b and 52b according to the program. FIG. 3 shows various functional blocks implemented by the control arithmetic units 51a and 52a. The storage devices 51b and 52b can be used as databases.

(4-5) Modification 1E
An outside air introduction unit 110 may be attached to the first unit 20 as shown in FIG. The outside air introduction unit 110 has a third fan 111 and a fifth detector 112 . The outside air introduction unit 110 takes in the outside air OA from outside the target space 100 and blows it to the first unit 20 with the third fan 111 . The fifth detector 112 detects the air volume of the outside air OA sent to the first unit 20 . The fifth detection unit 112 transmits the detected value of the blowing volume of the outside air OA to the main controller 51 . When the outside air OA is sent from the outside air introduction unit 110 to the first unit 20, the main controller 51 may be configured to correct the control of the output of the first fan 21 according to the blowing amount of the outside air OA. . For example, an air volume sensor, an air velocity sensor, or a differential pressure sensor can be used for the fifth detection unit 112 .

(4-6) Modification 1F
In the air supply system 10 according to the modification 1F, as shown in FIG. 5, a third detection unit is provided downstream of the first unit 20 of the air supply system 10 according to the embodiment shown in FIG. A pressure sensor 90 is arranged. This pressure sensor 90 detects the pressure of the first air SA sent by the first fan 21 . The pressure sensor 90 is arranged, for example, near the first unit 20 in the duct 40 , in other words near the entrance 41 a of the duct 40 . The configuration other than the pressure sensor 90 is the same as that of the air supply system 10 of the above-described embodiment, so description thereof will be omitted. The main controller 51 acquires the pressure value of the first air SA detected by the pressure sensor 90 . The main controller 51 controls the rotational speed of the first fan 21 so that the value of the pressure of the first air SA falls within a predetermined range. The main controller 51 increases the rotation speed of the first fan 21 if the value of the pressure of the first air SA is smaller than the lower limit value of the predetermined range. The main controller 51 reduces the rotational speed of the first fan 21 if the value of the pressure of the first air SA is greater than the upper limit value of the predetermined range.

Further, as shown in FIG. 6, a pressure sensor 90 as a third detection unit is arranged downstream of the first unit 20 of the air supply system 10 according to the modification 1E shown in FIG. good too. A configuration of the controller 50 of FIG. 6 is shown in FIG.

(5) Features (5-1)
The air supply system 10 described above includes the first unit 20, the second unit 30, the duct 40, the remote sensor 70 as the first detector, the first unit, and the main controller 51 as the first controller. I have. The second unit 30 has a second fan 31 that supplies the first air SA to the target space 100 . The duct 40 conveys the first air SA sent from the first unit 20 by the first fan 21 to the second unit 30 . The remote sensor 70 detects information on the second air RA in the target space 100 . The information of the secondary air RA is, for example, the temperature of the secondary air RA, the _CO2 concentration of the secondary air RA or the humidity of the secondary air RA. The main controller 51 communicates with the second unit 30 and the remote sensor 70 . The second unit 30 includes a second detection section 32 that is a second detection section that detects the amount of air blown by the second fan 31, and a sub-controller 52 that is a second controller that controls the rotation speed of the second fan. I'm in. The main controller 51 determines the target air volume of the second unit 30 based on the information of the second air RA acquired from the remote sensor 70, such as a detected temperature value, a detected _CO2 concentration value, or a detected humidity value. The main controller 51 instructs the sub-controller 52 of the determined target air volume. The sub-controller 52 controls the rotation speed of the second fan 31 so that the air volume detected by the second detection unit 32 becomes the target air volume.

In the air supply system 10 configured in this manner, the second unit 30 receives an air volume instruction value from the main controller 51 and controls the air volume by the second unit 30 itself by the sub-controller 52 without depending on the main controller 51. can be done automatically. In this way, the main controller 51 may appropriately give the second unit 30 an instruction value of the air volume, and the control load on the main controller 51 can be reduced.

(5-2)
In the air supply system 10 of the above-described embodiment, the first unit 20 can exchange heat with the heat medium in the heat exchanger 22 and send conditioned air to the plurality of second units 30 . The plurality of second units 30 can air-condition the target space 100 using this air-conditioned air.

(5-3)
The controller 50 of the air supply system 10 described above determines the air volume supplied by the plurality of second units 30 according to at least one of the temperature, humidity, and CO ₂ concentration of the target space 100, The air volume of each of the two units 30 is controlled. In such an air supply system 10, the air volume of each of the plurality of second units 30 is controlled by the controller 50 to bring at least one of the temperature, humidity, and CO ₂ concentration of the target space 100 into an appropriate range. can keep.

(5-4)
The air supply system 10 according to Modification 1F includes a pressure sensor 90 which is a third detection unit arranged downstream of the first unit 20 and detects the pressure of the first air SA sent out by the first fan 21. ing. The main controller 51 controls the rotational speed of the first fan 21 so that the pressure value obtained from the pressure sensor 90 is within a predetermined range. As a result, the value of the pressure downstream of the first unit 20 falls within the predetermined range, and the first fan 21 and the Excess power consumption generated in the second fan 31 can be saved.

(5-5)
In the air supply system 10 described above, the main controller 51 can control the output of the first fan 21 to an appropriate value according to the total amount of air supplied to the target space 100 . The total amount of supplied air is an example of the air amount of the first air SA of the plurality of second fans 31 . Such control by the main controller 51 allows the air supply system 10 to reduce the energy consumption of the system as a whole.

(5-6)
In the air supply system 10 described above, the main controller 51 changes the operating state of at least one of the plurality of second fans 31 or the air volume of at least one of the plurality of second fans 31. When doing so, priority is given to increasing the output of the fan with high fan efficiency among the first fan 21 and the plurality of second fans 31, or priority is given to reducing the output of the fan with low fan efficiency. can be done. In the air supply system 10 configured in this way, the main controller 51 controls to preferentially increase the output of the fan with high fan efficiency or decrease the output of the fan with low fan efficiency. Reduce energy consumption.

(5-7)
In the air supply system 10 described above, the main controller 51 controls the processing static pressure of the second fan 31 with the highest fan efficiency among the plurality of second fans 31 to be constant or the processing static pressure of the plurality of second fans 31 By determining the output of the first fan 21 so that the fan rotation speed of the second fan 31 with the highest fan efficiency is maximized, the output of the second fan 31 with the lowest fan efficiency can be preferentially reduced. Can be configured. In this configuration, as a result of preferentially reducing the output of the second fan 31 with low fan efficiency, energy consumption can be reduced compared to the case of reducing the output of the second fan 31 with higher fan efficiency. can be done.

(5-8)
In the air supply system 10 described above, the main controller 51 controls the processing static pressure of the second fan 31 with the lowest fan efficiency among the plurality of second fans 31 to be constant or the processing static pressure of the plurality of second fans 31 By determining the output of the first fan 21 so that the fan rotation speed of the second fan 31 with the lowest fan efficiency is minimized, it is possible to preferentially increase the output of the fan with the highest fan efficiency. can. In the case of such a configuration, as a result of preferentially increasing the output of the second fan 31 with high fan efficiency, energy consumption can be reduced compared to the case of increasing the output of the second fan 31 with low fan efficiency. can be done.

(5-9)
In the air supply system 10 described above, the main controller 51 increases the output of the first fan 21 when the air volume of the one with the highest fan efficiency among the plurality of second fans 31 does not reach the target air volume. In the air supply system 10 configured in this manner, the main controller 51 increases the output of the first fan 21 so that the air volume of the fan with the highest fan efficiency among the plurality of second fans 31 reaches the target air volume. can be controlled to

Although embodiments of the present disclosure have been described above, it will be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure as set forth in the appended claims. .

10 air supply system 20 first unit 21 first fan 22 heat exchanger 23 fourth detector 30 second unit 31 second fan 32 second detector 33 differential pressure sensor 40 duct 50 controller 51 main controller (of the first controller example)
52 Sub-controller (example of second controller)
70 Remote sensor (Example of the first detection unit)
90 pressure sensor (example of third detection unit)

Japanese Patent Application Laid-Open No. 2001-304614

Claims (12)

a first unit (20) having a first fan (21);
a plurality of second units (30) having a second fan (31) that supplies the first air to the target space;
a duct (40) for conveying the first air sent by the first fan from the first unit to a plurality of the second units;
a first detection unit (70) for detecting information about the second air in the target space;
a first controller (51) that communicates with the first unit, the plurality of second units, and the first detector;
with
Each of the second units includes a second detector (32) that detects the amount of air blown by the second fan, and a second controller (52) that controls the rotation speed of the second fan,
The first controller determines a target air volume for each of the plurality of second units based on the information on the second air in the target space acquired from the first detection unit, and determines the target air volume for each of the plurality of second units. 2 Instruct the controller,
The air supply system (10), wherein each of the second controllers controls the rotational speed of the second fan so that the air volume detected by the second detection unit becomes the target air volume. The first controller determines the output of the first fan and the plurality of target air volumes of the plurality of second units when changing the air volume supplied to the target space.
The air supply system (10) of claim 1. The first unit has a heat exchanger (22) through which a heat medium flows,
wherein the heat exchanger exchanges heat between the first air delivered by the first fan and the heat medium;
An air supply system (10) according to claim 1 or claim 2 . the first detection unit is a temperature sensor, a CO ₂ concentration sensor or a humidity sensor;
The first controller adjusts the target air volume of the plurality of second units based on the preset temperature, _CO2 concentration, or humidity of the target space and the values detected by the first detection unit. decide,
The air supply system (10) according to claim 3 . Further comprising a third detection unit arranged downstream of the first unit and detecting the pressure of the first air sent out by the first fan,
The first controller controls the rotation speed of the first fan so that the pressure value obtained from the third detection unit is within a predetermined range.
The air supply system (10) according to any one of claims 1-4 . A plurality of the first detection units are provided corresponding to each of the plurality of second units,
The first controller determines a plurality of the target air volumes of the plurality of the second units based on the information of the second air in the target space acquired from the plurality of the first detection units, and determines each of the second controllers to indicate each target air volume to
The air supply system (10) according to any one of claims 1-5 . When the first controller changes the operating state of at least one second fan among the plurality of second fans or the air volume of at least one second fan among the plurality of second fans , giving priority to increasing the output of the fan with high fan efficiency among the first fan and the plurality of second fans, or prioritizing reducing the output of the fan with low fan efficiency;
The air supply system (10) according to claim 6 . The first controller controls the processing static pressure of the highest fan efficiency among the plurality of second fans to be constant, or the fan rotation speed of the highest fan efficiency among the plurality of second fans. determining the output of the first fan to maximize;
The air supply system (10) according to claim 7 . The first controller controls the processing static pressure of the fan with the lowest fan efficiency among the plurality of second fans to be constant, or the fan rotation speed of the fan with the lowest fan efficiency among the plurality of second fans. determine the output of the first fan to be the minimum;
The air supply system (10) according to claim 7 . a plurality of differential pressure sensors (33) for sensing process static pressures of the plurality of second fans;
wherein the first controller determines the output of the first fan based on the values detected by the plurality of differential pressure sensors;
The air supply system (10) according to claim 8 or claim 9 . The first controller increases the output of the first fan when the air volume of one of the plurality of second fans with the highest fan efficiency does not reach the target air volume.
The air supply system (10) according to claim 8 or claim 9 . Further comprising a fourth detection unit (23) for detecting the air volume of the first air sent out by the first fan,
wherein the first controller uses at least one of the plurality of second detectors and the fourth detectors to compare fan efficiencies of the first fan and the plurality of second fans;
The air supply system (10) according to any one of claims 7-10 .

Images