JP2021001721A - Air supply system - Google Patents

Abstract

To suppress excessive energy consumption generated in each fan in an air supply system.SOLUTION: A duct 40 is for carrying first air SA blown out from a first unit 20 to a first fan 21 to a second unit 30. A remote sensor 70 serving as a first detection section detects information on second air RA in an object space 100. The second unit 30 includes: a second detection section 32 detecting air quantity blown by the second fan 31; and a sub controller 52 that is a second controller controlling rotational frequency of the second fan 31. A main controller 51 determines target air quantity of the second unit 30 on the basis of the information on the second air RA acquired from the remote sensor 70, and instructs the sub controller 52 of the target air quantity. The sub controller 52 controls the rotational frequency of the second fan 31 so that the air quantity detected by the second detection section 32 becomes the target air quantity.SELECTED DRAWING: Figure 1

Description

An air supply system that distributes the air supplied to the target space such as a room in a building through a duct.

Patent Document 1 (Japanese Unexamined Patent 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 a duct, and the air heat-exchanged by one air conditioner main body is divided into the plurality of air outlets to supply air to the air conditioning zone.

The controller of Patent Document 1 controls the rotation speeds of a pump motor of a pump unit whose flow rate can be adjusted to send a heat medium from a heat source to a heat exchange coil and fan motors of a plurality of fan units. Sensors are provided at the plurality of outlets, 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, the rotation speeds of the fan motors of the plurality of fan units are controlled by one controller provided outside the plurality of fan units. The controller of Patent Document 1 controls the rotation speed of the fan motor of each fan unit while checking the blowout air volume signals of a 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 provided with 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 detection unit, 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. The duct conveys the first air sent from the first unit by the first fan to the second unit. The first detection unit detects the information of the second air in the target space. The first controller communicates with the second unit and the first detection unit. The second unit includes a second detection unit 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 of the second air acquired from the first detection unit, and instructs the second controller of the target air volume. The second controller controls the rotation speed of the second fan so that the air volume detected by the second detection unit becomes 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 the second controller automatically controls the air volume by the second controller without depending on the first controller. be able to. The control load of the first controller can be reduced by appropriately giving an indicated value of the air volume to the first controller to the second unit.

The second aspect air supply system is the first aspect system, and 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 to send the air-conditioned first air to the second unit. The second unit can air-condition the target space by using the air-conditioned first air.

The air supply system of the third viewpoint is the system of the second viewpoint, the first detection unit is a temperature sensor, a CO ₂ concentration sensor or a humidity sensor, and the first controller sets a preset target space. The target air volume of the second unit is determined based on the temperature, the set CO ₂ concentration or the set humidity, and the value detected by the first detection unit.

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

The air supply system of the fourth viewpoint is any system from the first viewpoint to the third viewpoint, which is arranged on the downstream side of the first unit and detects the pressure of the first air sent by the first fan. A third detection unit is further provided. The first controller controls the rotation speed of the first fan so that the pressure value acquired from the third detection unit falls within a predetermined range.

In the air supply system of the fourth aspect, the pressure value on the downstream side of the first unit falls within a predetermined range, so that the pressure value on the downstream side of the first unit deviates from the predetermined range. The extra power consumption generated by the first fan and the second fan can be omitted.

The air supply system of the fifth viewpoint is any system from the first viewpoint to the fourth viewpoint, and includes a plurality of second units. The duct conveys the first air sent from the first unit by the first fan to the plurality of second 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 of the plurality of second units based on the information of the second air in the target space acquired from the plurality of first detection units, and instructs each second controller of 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 air of the first air supplied by the plurality of second fans. As a result, the air supply system can suppress power consumption.

The air supply system of the sixth aspect is the system of the fifth aspect, in which the first controller is in the operating state of at least one second fan among the plurality of second fans or among 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-efficient fan among the first fan and the plurality of second fans, or decreasing the output of the fan with low fan efficiency. Give priority to that.

In the sixth aspect of the air supply system, 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 decreases the output of the fan with low fan efficiency. Control. As a result, the energy consumption of the air supply system is suppressed.

The air supply system of the seventh aspect is the system of the sixth aspect, in which the first controller has the highest fan efficiency among the plurality of second fans, but the processing static pressure is constant or a plurality of second. The output of the first fan is determined so that the fan speed of the two fans is the highest, but the fan speed is maximized.

In the air supply system of the seventh aspect, the first controller has the highest fan efficiency among the plurality of second fans, but the processing static pressure is 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 fan speed is maximized although it is high. As a result, the output of the second fan, which has low fan efficiency, can be preferentially reduced.

The air supply system of the eighth viewpoint is the system of the sixth viewpoint, in which the first controller has the lowest fan efficiency among the plurality of second fans, but the processing static pressure is constant or a plurality of second. The output of the first fan is determined so that the fan speed of the two fans is the lowest, but the fan speed is minimized.

In the air supply system of the eighth viewpoint, the first controller has the lowest fan efficiency among the plurality of second fans, but the processing static pressure is 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 fan speed is minimized although it is low. As a result, the output of a fan with high fan efficiency can be increased preferentially.

The air supply system of the ninth viewpoint is a system of the seventh viewpoint or the eighth viewpoint, which includes a plurality of differential pressure sensors for detecting the processing static pressure of a plurality of second fans, and the controller has a plurality of differences. The output of the first fan is determined based on the detected value of the pressure sensor.

The air supply system of the tenth viewpoint is the system of the seventh viewpoint or the eighth viewpoint, and the first controller has the maximum fan efficiency among the plurality of second fans, but the air volume does not reach the target air volume. , Increase the output of the first fan.

In the air supply system of the tenth aspect, the first controller may increase the output of the first fan and control the air volume of the plurality of second fans having the maximum fan efficiency to reach the target air volume. it can.

The air supply system according to the eleventh aspect is any of the systems from the sixth aspect to the tenth aspect, and further includes a fourth detection unit for detecting the air volume of the first air sent by the first fan. The first controller uses at least one of the plurality of second detection units and the plurality of fourth detection units for comparing the fan efficiencies 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 the structure of the air supply system which concerns on the modification. A block diagram for explaining the configuration of the controller. The conceptual diagram which shows the other example of the structure of the air supply system which concerns on the modification. The conceptual diagram which shows the other example of the structure of the air supply system which concerns on the modification. The conceptual diagram which shows the other example of the structure of the air supply system which concerns on the modification. The block diagram for demonstrating the configuration of the controller shown in 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 the movement of air is restricted by floors, ceilings and walls. A plurality of second units 30 are arranged with respect to one or a plurality of target spaces 100. FIG. 1 shows an example in which an air supply system 10 having two second units 30 is arranged in one target space 100 as a typical example of an air supply system 10 having a plurality of second units 30. It is shown. The number of the second units 30 may be 3 or more, and is appropriately set. As described above, the target space 100 in which the second unit 30 is arranged may be two or more.

The duct 40 distributes the first air SA sent 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 a branch pipe 42 branched from the main pipe 41. Although FIG. 1 shows a 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 and may be arranged in the first unit 20. It may be arranged so as to extend from the inside to the outside of the first unit 20. When the main pipe 41 is arranged in the first unit 20, a part of the casing of the first unit 20 may function as the main pipe 41. FIG. 1 shows an example in which the inlet 41a of the main pipe 41 is connected to the first unit 20. The first fan 21 is arranged in the first unit 20. Here, all the air blown out from the first fan 21 is configured to flow into the duct 40.

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

Each second unit 30 and the target space 100 are connected by a ventilation passage 81. The inlet 81a of the ventilation path 81 is connected to the second unit 30. Each second fan 31 generates an air flow from the outlet 42b of the duct 40 toward the inlet 81a of the ventilation passage 81 in the second unit 30. From another point of view, this means that each second fan 31 sucks the first air SA from the outlet 42b of the branch pipe 42. Each second fan 31 can change the static pressure in each second unit 30 (in front of the inlet 81a of the ventilation passage 81) by changing the rotation speed. Assuming that the static pressure of the duct 40 is constant, each of the second fans 31 increases the static pressure in each of the second units 30 (in front of the inlet 81a of the ventilation passage 81) by increasing the rotation speed. be able to. When the static pressure in the second unit 30 becomes high, the amount of air in the first air SA flowing through the ventilation passage 81 increases. By changing the amount of air flowing in this way, the amount of air supply air blown from the outlet 81b of each ventilation path 81 to the target space 100 changes.

The controller 50 includes a main controller 51 and a plurality of sub-controllers 52. The main controller 51 and the plurality of sub-controllers 52 are connected to each other to form the controller 50. 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. When the output of the first fan 21 increases, the state of the first fan 21 changes in the direction in which 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 the air volume change to the corresponding second fan 31. Each sub-controller 52 stores the target air volume. Each sub-controller 52 issues an instruction (instruction regarding changing the air volume) to increase the rotation speed of the second fan 31 if the supply air volume is insufficient with respect to the target air volume. On the contrary, if the supply air volume is excessive with respect to the target air volume, the sub controller 52 issues an instruction (instruction regarding changing the air volume) to reduce the rotation speed of the second fan 31.

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, and in other words, the amount of air to be supplied is the required amount of air supply. The required output of the first fan 21 is determined based on the obtained air amount information. The controller 50 controls the output of the first fan 21 so as to obtain 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
In addition to the first fan 21 described above, the first unit 20 includes a heat exchanger 22, a fourth detection unit 23, a temperature sensor 24, and a water amount adjusting valve 25. For example, cold water or hot water is supplied to the heat exchanger 22 as a heat medium from the heat source unit 60. The heat medium supplied to the heat exchanger 22 may be something other than cold water or hot water, for example brine. For the fourth detection unit 23, for example, an air volume sensor, a wind speed sensor, or a differential pressure sensor can be used.

The fourth detection unit 23 detects the amount of air blown by the first fan 21. The fourth detection unit 23 is connected to the main controller 51. The value of the air volume detected by the fourth detection unit 23 is transmitted from the fourth detection unit 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 amount of air supply air supplied from the plurality of second units 30 to the target space 100.

The 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 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. The 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 returned second air RA exchanges heat with the cold water or hot water flowing through the heat exchanger 22 to become conditioned air. The amount of heat given to the first air SA that exchanges heat with the heat exchanger 22 and is sent to the duct 40 is adjusted by the water amount adjusting valve 25. The opening degree of the water amount adjusting valve 25 is controlled by the main controller 51. As the opening degree of the water amount adjusting 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. On the contrary, when the opening degree of the water amount adjusting valve 25 becomes small, the amount of water flowing through the heat exchanger 22 decreases, and the amount of heat exchanged between the heat exchanger 22 and the first air SA per unit time decreases.

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

(2-3) Remote sensor 70
The plurality of remote sensors 70 have a function of a temperature sensor. 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 detected temperature value 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 a 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 a 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 total amount of the target air volume to be supplied to the target space 100.

For example, when 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, and from the intermediate value. Comparing with the case where the value is large, the ratio of the output of the first fan 21 is larger than the ratio of the output of the plurality of second fans 31 when the value is larger than the intermediate value. On the contrary, when the static pressure at the outlet 41b of the main pipe 41 (the inlet 42a of the branch pipe 42) takes an intermediate value and a value smaller than the intermediate value, the case where the static pressure takes a smaller value is compared. However, the output ratio of the first fan 21 is smaller than the output ratio of the plurality of second fans 31. There is an efficient range in the ratio of the output of the first fan 21 to the output of the plurality of second fans 31. Therefore, the main controller 51 determines the output of the first fan 21 so as to have an efficient ratio. In other words, it means that the main controller 51 determines the output of the first fan 21 at a predetermined appropriate output with respect to the total amount of the target air volume.

For example, considering the following method of determining the output of the first fan 21, it can be seen that the output of the first fan 21 has an output range of the first fan 21 suitable for reducing power consumption. If the output of the first fan 21 is increased to increase the total power consumption of the first fan 21 and the plurality of second fans 31, the output of the first fan 21 is gradually decreased to increase the output of the first fan 21 and the plurality of second fans. If the total power consumption of the two fans 31 is determined to be the output of the first fan 21 before it starts to rise again, the determined output range becomes a range in which the power consumption is smaller than the other ranges. On the contrary, if the output of the first fan 21 is lowered to increase the total power consumption of the first fan 21 and the plurality of second fans 31, the output of the first fan 21 is gradually increased to increase the output of the first fan 21 and the first fan 21. If the total power consumption of the plurality of second fans 31 is determined to be the output of the first fan 21 before it starts to rise again, the determined output range becomes 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 decrease the output of the first fan 21 and the plurality of second fans. If the total power consumption of the two fans 31 is determined to be the output of the first fan 21 before it starts to rise again, the determined output range becomes a range in which the power consumption is smaller than the other ranges. On the contrary, if the output of the first fan 21 is lowered and the total power consumption of the first fan 21 and the plurality of second fans 31 is lowered, the output of the first fan 21 is gradually lowered, and the first fan 21 and If the total power consumption of the plurality of second fans 31 is determined to be the output of the first fan 21 before it starts to rise again, the determined output range becomes a range in which the power consumption is smaller than the other ranges. However, determining an appropriate output of the first fan 21 is not limited to such a method.

After the main controller 51 determines the target air volume and transmits the target air volume value to each sub controller 52, each second unit 30 other than the second unit 30 having the highest fan efficiency is seconded by the corresponding sub controller 52. The rotation speed of the fan 31 is adjusted. The rotation speeds of the plurality of second fans 31 are adjusted independently of each other.
At this time, at the determined output of the first fan 21, the rotation speed of the second fan 31 of the second unit 30 having the highest fan efficiency is maximized. Here, the second unit 30 having the highest fan efficiency is the second unit 30 having the smallest energy consumption when the static pressure at the inlet 42a of the branch pipe 42 is the same and the amount of air supplied to the target space 100 is the same. is there. Further, the second unit 30 having the lowest fan efficiency is the second unit 30 having the largest energy consumption when the static pressure at the inlet 42a of the branch pipe 42 is the same and the amount of air supplied to the target space 100 is the same. ..

Each sub-controller 52 controls the rotation speed of each second fan 31 in order to match the supply air volume with the target air volume. The plurality of sub-controllers 52 control the rotation speeds of the plurality of second fans 31 independently of each other. If the air volume detected by the second detection unit 32 is smaller than the target air volume, 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 larger than the target air volume, each sub-controller 52 reduces the rotation speed of each second fan 31. If the rotation speed of the second unit 30 having 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 having the highest fan efficiency. Adjust so that

When changing the air volume, the main controller 51 uses 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. When changing the above, priority is given to increasing the output of the fan having high fan efficiency among the first fan 21 and the plurality of second fans 31, or giving priority to decreasing the output of the fan having low fan efficiency. In other words, 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 when increasing the amount of air supplied to the target space 100. The output of one fan 21 and the target air volume of the plurality of second units 30 are determined. On the contrary, when the amount of air supplied to the target space 100 is reduced, the main controller 51 reduces the output of the fan having 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 plurality of second units 30 having the maximum fan efficiency 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 example (4-1) Modification example 1A
In the above embodiment, when the main controller 51 determines the output of the first fan 21, the main controller 51 determines that the rotation speed of the plurality of second fans 31 having the highest fan efficiency is maximized. The case was explained.

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

When the main controller 51 reduces the target air volume, the main controller 51 outputs the output of the first fan 21 so that the processing static pressure of the plurality of second fans 31 having the highest fan efficiency is constant. The configuration may be determined. In this configuration, the second unit 30 having a constant processing static pressure among the second units 30 can maintain a higher rotation speed of the second fan 31, which is more efficient than the others. The overall efficiency of the ki system 10 can be kept high. When adopting a configuration that keeps the processing static pressure constant in this way, for example, each second unit 30 has a differential pressure sensor 33 for detecting the processing static pressure of the second fan 31 (see FIG. 2). 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 having the highest fan efficiency. In this case, in each of the second units 30 other than the second unit 30 in which the processing differential pressure is kept constant, the corresponding sub-controller 52 adjusts the rotation speed of the second fan 31. The rotation speeds of the plurality of second fans 31 are adjusted independently of each other.

When the main controller 51 increases the target air volume, the main controller 51 outputs the output of the first fan 21 so that the processing static pressure of the plurality of second fans 31 having the lowest fan efficiency is constant. The configuration may be determined. When configured in this way, 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 less efficient than the others, at a low speed. The overall efficiency of the ki system 10 can be kept high. When adopting a configuration that keeps the processing static pressure constant in this way, for example, each second unit 30 has a differential pressure sensor 33 for detecting the processing static pressure of the second fan 31 (see FIG. 2). 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 having the lowest fan efficiency. In this case, in each of the second units 30 other than the second unit 30 in which the processing differential pressure is kept constant, the corresponding sub-controller 52 adjusts the rotation speed of the second fan 31. The rotation speeds of the plurality of second fans 31 are adjusted independently of each other.

(4-2) Modification 1B
In the above embodiment, the case where the remote sensor 70 has a temperature sensor has been described, but the remote sensor 70 may have at least one function of, for example, a temperature sensor, a CO ₂ concentration sensor, and a humidity sensor. .. When configured in this way, the plurality of sub-controllers 52 receive at least one detected value of the temperature, CO ₂ concentration, and humidity of the target space 100 from the connected remote sensor 70, respectively. Each sub-controller 52 holds data of set values to be detected by the remote sensor 70. Each sub-controller 52 transmits at least one set value 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 based on the set value according to the detection value of the corresponding remote sensor 70. 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 may take a form that does not form the heat exchanger 22. The air supply system 10 may be configured as a system that ventilates the target space 100, for example, when the CO ₂ concentration in the target space 100 is high.

(4-4) Modification 1D
The controller 50 is realized by a computer. The controller 50 includes control arithmetic units 51a and 52a and storage devices 51b and 52b. A processor such as a CPU or GPU can be used for the control arithmetic units 51a and 52a. The control arithmetic units 51a and 52a read the programs stored in the storage devices 51b and 52b, and perform predetermined image processing and arithmetic processing according to the programs. Further, the control arithmetic units 51a and 52a can write the arithmetic results in the storage devices 51b and 52b and read the information stored in the storage devices 51b and 52b according to the program. FIG. 3 shows various functional blocks realized by the control arithmetic units 51a and 52a. The storage devices 51b and 52b can be used as a database.

(4-5) Modification 1E
As shown in FIG. 4, the outside air introduction unit 110 may be attached to the first unit 20. The outside air introduction unit 110 has a third fan 111 and a fifth detection unit 112. The outside air introduction unit 110 takes in the outside air OA from the outside of the target space 100 by the third fan 111 and blows it to the first unit 20. The fifth detection unit 112 detects the air volume of the outside air OA sent to the first unit 20. The fifth detection unit 112 transmits the value of the detected air flow amount 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 output control of the first fan 21 according to the amount of air blown by the outside air OA. .. For the fifth detection unit 112, for example, an air volume sensor, a wind speed sensor, or a differential pressure sensor can be used.

(4-6) Modification 1F
In the air supply system 10 according to the modified example 1F, as shown in FIG. 5, a third detection unit is located on the downstream side of the first unit 20 of the air supply system 10 according to the embodiment shown in FIG. The pressure sensor 90 is arranged. The 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, in the vicinity of the first unit 20 in the duct 40, in other words, in the vicinity of the inlet 41a of the duct 40. Since the configuration other than the pressure sensor 90 is the same as that of the air supply system 10 of the above embodiment, the description thereof will be omitted. The main controller 51 acquires the value of the pressure of the first air SA detected by the pressure sensor 90. The main controller 51 controls the rotation speed of the first fan 21 so that the pressure value of the first air SA falls within a predetermined range. If the pressure value of the first air SA is smaller than the lower limit value in the 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 larger than the upper limit value in the predetermined range, the main controller 51 reduces the rotation speed of the first fan 21.

Further, as shown in FIG. 6, a pressure sensor 90, which is a third detection unit, is arranged on the downstream side of the first unit 20 of the air supply system 10 according to the modified example 1E shown in FIG. May be good. The 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 which is the first detection unit, and the first unit and the main controller 51 which is 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 the information of the second air RA in the target space 100. The information of the second air RA is, for example, the temperature of the second air RA, the CO ₂ concentration of the second air RA, or the humidity of the second 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 unit 32, which is a second detection unit that detects the amount of air blown by the second fan 31, and a sub controller 52, which is a second controller that controls the rotation speed of the second fan. I'm out. 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, for example, the temperature detection value, the CO ₂ concentration detection value, or the humidity detection 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 way, the second unit 30 receives the indicated value of the air volume from the main controller 51, and the sub controller 52 controls the air volume by the second unit 30 itself without depending on the main controller 51. Can be done automatically. In this way, the instruction value of the air volume may be appropriately given to the second unit 30 from the main controller 51, and the control load of the main controller 51 can be reduced.

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

(5-3)
The controller 50 of the air supply system 10 described above determines the air volume of the air 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, and the plurality of first units. The air volume of each of the two units 30 is controlled. In such an air supply system 10, the controller 50 controls the air volume of each of the plurality of second units 30 to set at least one of the temperature, humidity, and CO ₂ concentration of the target space 100 to an appropriate range. Can be kept.

(5-4)
The air supply system 10 according to the modified example 1F includes a pressure sensor 90 which is arranged on the downstream side of the first unit 20 and is a third detection unit for detecting the pressure of the first air SA sent by the first fan 21. ing. The main controller 51 controls the rotation speed of the first fan 21 so that the value of the pressure acquired from the pressure sensor 90 falls within a predetermined range. As a result, the pressure value on the downstream side of the first unit 20 is within a predetermined range, so that the pressure value on the downstream side of the first unit 20 is out of the predetermined range, as compared with the case where the first fan 21 and The extra power consumption generated by the second fan 31 can be omitted.

(5-5)
In the above-mentioned air supply system 10, the main controller 51 can control the output of the first fan 21 to an appropriate value according to the total amount of air supply air with respect to the target space 100. The total amount of air supply air is an example of the amount of air in the first air SA of the plurality of second fans 31. By such control of the main controller 51, the air supply system 10 can suppress the energy consumption of the entire system.

(5-6)
In the above-mentioned air supply system 10, 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 second fan 31 of the plurality of second fans 31. When doing so, it is configured to give priority to increasing the output of the fan having high fan efficiency among the first fan 21 and the plurality of second fans 31, or to give priority to decreasing the output of the fan having low fan efficiency. Can be done. In the air supply system 10 configured in this way, the main controller 51 controls the output of the fan having high fan efficiency to be preferentially increased or decreased to decrease the output of the fan having low fan efficiency. Reduce energy consumption.

(5-7)
In the above-mentioned air supply system 10, the main controller 51 makes the processing static pressure of the second fan 31 having the highest fan efficiency among the plurality of second fans 31 constant, or among 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 having the highest fan efficiency is maximized, the output of the second fan 31 having 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 having a lower fan efficiency, the energy consumption is reduced as compared with the case of reducing the output of the second fan 31 having a higher fan efficiency. Can be done.

(5-8)
In the above-mentioned air supply system 10, the main controller 51 makes the processing static pressure of the second fan 31 having the lowest fan efficiency among the plurality of second fans 31 constant, or among 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 having the lowest fan efficiency is minimized, the output of the fan with high fan efficiency can be preferentially increased. it can. In this configuration, as a result of preferentially increasing the output of the second fan 31 having a higher fan efficiency, the energy consumption is reduced as compared with the case of increasing the output of the second fan 31 having a lower fan efficiency. Can be done.

(5-9)
In the above-mentioned air supply system 10, the main controller 51 increases the output of the first fan 21 when the air volume of the plurality of second fans 31 having the maximum fan efficiency does not reach the target air volume. In the air supply system 10 configured in this way, the main controller 51 increases the output of the first fan 21 so that the air volume of the plurality of second fans 31 having the maximum fan efficiency reaches the target air volume. Can be controlled to.

Although the embodiments of the present disclosure have been described above, it will be understood that various modifications of the forms and details are possible without departing from the purpose and scope of the present disclosure described in the claims. ..

10 Air supply system 20 1st unit 21 1st fan 22 Heat exchanger 23 4th detector 30 2nd unit 31 2nd fan 32 2nd detector 33 Differential pressure sensor 40 Duct 50 controller 51 Main controller (1st controller Example)
52 Sub controller (example of second controller)
70 Remote sensor (example of 1st detector)
90 Pressure sensor (example of 3rd detector)

Japanese Unexamined Patent Publication No. 2001-304614

Claims (11)

The first unit (20) having the first fan (21) and
A second unit (30) having a second fan (31) that supplies the first air to the target space,
A duct (40) that conveys the first air sent from the first unit by the first fan to the second unit, and
A first detection unit (70) that detects information on the second air in the target space, and
A first controller (51) that communicates with the first unit, the second unit, and the first detection unit, and
With
The second unit includes a second detection unit (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 the target air volume of the second unit based on the information of the second air acquired from the first detection unit, and instructs the second controller of the target air volume.
The second controller is an air supply system (10) that controls the rotation speed of the second fan so that the air volume detected by the second detection unit becomes the target air volume. The first unit has a heat exchanger (22) through which a heat medium flows.
The heat exchanger exchanges heat between the first air delivered by the first fan and the heat medium.
The air supply system (10) according to claim 1. The first detection unit is a temperature sensor, a CO ₂ concentration sensor, or a humidity sensor.
The first controller determines the target air volume of the second unit based on a set temperature, a set CO ₂ concentration or a set humidity of a preset target space, and a value detected by the first detection unit. ,
The air supply system (10) according to claim 2. A third detection unit, which is arranged on the downstream side of the first unit and detects the pressure of the first air sent by the first fan, is further provided.
The first controller controls the rotation speed of the first fan so that the pressure value acquired from the third detection unit falls within a predetermined range.
The air supply system (10) according to any one of claims 1 to 3. A plurality of the second units are provided.
The duct conveys the first air sent from the first unit by the first fan to the plurality of second units.
A plurality of the first detection units are provided corresponding to each of the plurality of the 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 first detection units, and each of the second controllers. Instruct each target air volume to
The air supply system (10) according to any one of claims 1 to 4. When the first controller changes the operating state of at least one of the second fans in the plurality of second fans or the air volume of at least one of the second fans in the plurality of second fans. , Priority is given to increasing the output of the fan having high fan efficiency among the first fan and the plurality of second fans, or giving priority to decreasing the output of the fan having low fan efficiency.
The air supply system (10) according to claim 5. When the first controller has the highest fan efficiency among the plurality of second fans, the processing static pressure is constant, or the fan rotation speed of the plurality of second fans having the highest fan efficiency is increased. Determine the output of the first fan so that it is maximized.
The air supply system (10) according to claim 6. The first controller has the lowest fan efficiency among the plurality of second fans so that the processing static pressure becomes constant, or the fan rotation speed of the plurality of second fans having the lowest fan efficiency is increased. The output of the first fan is determined so as to be the minimum.
The air supply system (10) according to claim 6. A plurality of differential pressure sensors (33) for detecting the processing static pressure of the plurality of second fans are provided.
The first controller determines the output of the first fan based on the detection values of the plurality of differential pressure sensors.
The air supply system (10) according to claim 7 or 8. The first controller increases the output of the first fan when the air volume of the plurality of second fans having the maximum fan efficiency does not reach the target air volume.
The air supply system (10) according to claim 7 or 8. A fourth detection unit (23) for detecting the air volume of the first air sent by the first fan is further provided.
The first controller uses at least one of the plurality of second detection units and the fourth detection unit for comparing the fan efficiencies of the first fan and the plurality of second fans.
The air supply system (10) according to any one of claims 6 to 9.

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