JP2023162563A - Air treatment system - Google Patents

Abstract

To enable linkage control of a ventilation device and an air treatment device considering indoor ventilation amount.SOLUTION: An air treatment system includes: a ventilation device 12 that ventilates an indoor space; an air treatment device 28, 65 that purifies indoor air; and controllers 60, 24, 36, 70 for controlling the ventilation device 12 and the air treatment device 28, 65. The controllers 60, 24, 36, 70 control the ventilation device 12 and the air treatment device 28, 65 so that total amount of ventilation amount Q1 of the ventilation device 12 and treatment amount Q2 of the air treatment device 28, 65 becomes a predetermined amount Q.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to air handling systems.

Patent Document 1 discloses a ventilation air conditioning system that includes a ventilation device, an air purifying device, and a control device that controls these in conjunction with each other. This ventilation air conditioning system is configured so that even if the indoor air is contaminated by the air taken into the room by the ventilation device, the air purifier operates in conjunction with the air purifier to suppress indoor contamination.

Japanese Patent Application Publication No. 2006-98007

In recent years, it has been recommended to increase indoor ventilation from the perspective of preventing infectious diseases caused by viruses and bacteria. The technique described in Patent Document 1 only performs interlock control of a ventilation device and an air purifier by focusing on the degree of indoor contamination, and does not perform interlock control that takes into account the amount of indoor ventilation.

An object of the present disclosure is to realize interlocking control of a ventilation device and an air processing device in consideration of the amount of indoor ventilation.

(1) The air treatment system of the present disclosure includes:
The controller includes a ventilation device that performs indoor ventilation, an air processing device that purifies the indoor air, and a controller that controls the ventilation device and the air processing device, and the controller controls the ventilation amount of the ventilation device. The ventilation device and the air treatment device are controlled so that the sum of the throughput of the air treatment device and the throughput of the air treatment device becomes a predetermined amount.

Air processing devices can be considered to have the same function as ventilation in that they purify indoor air (remove indoor pollutants, etc.). Therefore, in this disclosure, in addition to the ventilation amount by the ventilation device, the throughput amount of the air processing device is also considered as the indoor ventilation amount, and the sum of these is a predetermined amount, for example, the amount of indoor ventilation recommended or required by laws, regulations, etc. Ventilation equipment and air processing equipment are controlled so that the ventilation volume is as follows. Thereby, for example, even if the predetermined amount cannot be satisfied by the ventilation device alone, it becomes possible to satisfy the predetermined amount by also taking into account the amount of processing by the air processing device.

(2) In (1) above, preferably, the ventilation device has a concentration detection sensor that detects the indoor carbon dioxide concentration, and the controller is configured to control the indoor carbon dioxide concentration so that the indoor carbon dioxide concentration is equal to or lower than a predetermined first concentration. The ventilator is controlled as follows.

According to the above configuration, when the indoor carbon dioxide concentration exceeds a predetermined first concentration, for example, the maximum concentration (upper limit value) specified by laws and regulations, the indoor carbon dioxide concentration is reduced. The ventilation amount of the ventilation device can be controlled.

(3) In (2) above, preferably, the controller is configured such that the indoor carbon dioxide concentration is equal to or lower than a second concentration lower than the first concentration, and the indoor load due to the introduction of outside air is lower than a predetermined value. If the amount is large, the proportion of the throughput of the air treatment device is made larger than the proportion of the ventilation amount of the ventilation device.

According to the above configuration, when the carbon dioxide concentration is below the second concentration, there is little need to further reduce the carbon dioxide concentration, so if the indoor load due to the introduction of outside air is large, the processing amount of the air processing device is increased. , the load can be reduced.

(4) In (3) above, preferably, when the indoor carbon dioxide concentration is equal to or less than the first concentration and exceeds the second concentration, the controller reduces the amount of ventilation by the ventilation device while the controller Increase throughput by

According to the above configuration, if the indoor carbon dioxide concentration is not below the second concentration but is below the first concentration, the amount of air processed by the air processing device can be increased while reducing the amount of ventilation by the ventilation device. , it is possible to cope with an increase in the indoor load due to the introduction of outside air without significantly changing the indoor ventilation amount including the throughput.

(5) In any one of (1) to (4) above, preferably, the controller adjusts the throughput of the air processing device to The throughput of the air processing device is increased to meet the predetermined amount.

According to the above configuration, even if the total ventilation amount of the ventilation device and the processing amount of the air processing device meet a predetermined amount (for example, the recommended indoor ventilation amount), the indoor When the load is larger than the predetermined value, the throughput of the air processing device can be further increased, and the indoor load can be quickly reduced.

(6) In any one of (1) to (5) above, preferably, the controller further includes a person detection sensor for detecting a person in the room, and the controller is configured to detect the person at the location based on the detection result of the person detection sensor. Determine quantification.

According to the above configuration, the predetermined amount can be appropriately set depending on the situation of people in the room.

1 is a schematic configuration diagram of an air treatment system according to a first embodiment of the present disclosure. FIG. 2 is a block diagram of a control system of the air treatment system. It is a flowchart which shows the control procedure of the interlocking operation of an air processing system. FIG. 2 is a schematic configuration diagram of an air treatment system according to a second embodiment of the present disclosure. FIG. 2 is a block diagram of a control system of the air treatment system.

[First embodiment]
FIG. 1 is a schematic configuration diagram of an air treatment system according to a first embodiment of the present disclosure.
As shown in FIG. 1, the air processing system 10 includes an air conditioner 11 and a ventilation device 12. The air conditioner 11 includes an outdoor unit 21 and an indoor unit 22. The indoor unit 22 and the ventilation device 12 are installed indoors (inside a building). Specifically, the indoor unit 22 and the ventilation device 12 are installed in a space S3 in the ceiling of the room R. However, the indoor unit 22 and the ventilation device 12 may be installed on the wall of the room R, on the floor, under the ceiling, etc. The outdoor unit 21 is set outdoors (outside the building).

(Air conditioner configuration)
The air conditioner 11 adjusts the temperature of the air in the indoor space (air-conditioned space) S1 inside the room R by performing a vapor compression refrigeration cycle using a refrigerant circuit in which refrigerant circulates. The outdoor unit 21 and the indoor unit 22 are connected by a refrigerant pipe 23 that constitutes a refrigerant circuit.

The indoor unit 22 includes a fan 26 and a heat exchanger 27. The fan 26 takes in air from the indoor space S1, and the heat exchanger 27 exchanges heat between the taken air and the refrigerant to adjust the temperature of the air. The fan 26 blows out the temperature-adjusted air into the indoor space S1 again, thereby adjusting the temperature of the indoor space S1 as desired.

The indoor unit 22 of this embodiment includes an air cleaning unit (air cleaning device) 28. The air cleaning unit 28 constitutes an air processing device that purifies indoor air. This air cleaning unit 28 includes a filter 29 that removes pollutants such as dust, bacteria, viruses, and odors, and a cleaning device 30 that inactivates or decomposes the pollutants adsorbed on the filter 29. . As the filter 29, an electrostatic precipitator filter that charges and collects dust, a photocatalytic filter that decomposes organic substances such as odors by irradiation with light, or the like is adopted. The cleaning device 30 may be one that generates plasma discharge to generate active species with high oxidative decomposition power, or one that irradiates a photocatalytic filter with ultraviolet rays. However, the air cleaning unit 28 of the present disclosure only needs to include a filter 29 that can remove at least dust.

FIG. 2 is a block diagram of the control system of the air treatment system.
As shown in FIGS. 1 and 2, the air conditioner 11 (indoor unit 22) includes a controller 24 and a remote controller 25 (FIG. 1). The controller 24 (hereinafter also referred to as "air conditioning controller") controls the operation of the fan 26 and the like housed in the indoor unit 22. The air conditioning controller 24 is configured by, for example, a microcomputer including a control section 24a such as a CPU, and a storage section 24b such as a RAM or ROM. The air conditioning controller 24 exhibits a predetermined function when the control unit 24a executes a program installed in the storage unit 24b. The indoor controller 24 may include an integrated circuit such as FPGA or ASIC.

The air conditioning controller 24 is communicably connected to a ventilation controller 36 of the ventilation system 12 and an interlocking controller 60, which will be described later, by wire or wirelessly. Note that the air conditioning controller 24 may be provided in the outdoor unit 21 or may be provided in both the outdoor unit 21 and the indoor unit 22.

As shown in FIG. 1, the remote controller 25 is used to start/stop the operation of the air conditioner 11, and to set the indoor temperature, the strength of air blowing, and the like. The remote controller 25 is connected to the air conditioning controller 24 of the indoor unit 22 for wired or wireless communication. A user can remotely operate the air conditioner 11 by using the remote controller 25. The remote controller 25 of this embodiment is capable of turning on and off the interlocking operation of the air conditioner 11 and the ventilation device 12.

As shown in FIG. 2, the indoor unit 22 is provided with various sensors. Specifically, the indoor unit 22 is provided with a temperature sensor 51, a humidity sensor 52, and a human detection sensor 53. The air cleaning unit 28 of the indoor unit 22 is provided with a dust sensor 54 and an odor sensor 55. Temperature sensor 51 detects the indoor temperature. Humidity sensor 52 detects indoor humidity. The person detection sensor 53 detects people in the room. The dust sensor 54 detects the amount or concentration of dust in the room. The odor sensor 55 detects the concentration of odor components in the room.

The air conditioner 11 executes control of cooling operation and heating operation (control of refrigerant evaporation temperature, air volume, etc.) based on the temperature and humidity detected by the temperature sensor 51 and humidity sensor 52. The air conditioner 11 also controls the wind direction, air volume, etc. based on the presence or absence of people in the room and the number of people detected by the human detection sensor 53. The air conditioner 11 controls the cleaning device 30, air volume, etc. based on the concentration of odor components detected by the odor sensor 55. The air conditioner 11 executes control of the cleaning device 30, air volume control, etc. based on the amount or concentration of dust detected by the dust sensor 54.

Detection signals from each sensor 51 to 55 are input to the air conditioning controller 24. Each of the sensors 51 to 55 is provided in the casing of the indoor unit 22, but may be provided outside the casing. For example, each of the sensors 51 to 55 may be provided in a remote controller 25 connected to the indoor unit 22.

The indoor unit 22 of the air conditioner 11 can perform only the air purifying operation by the air purifying unit 28 without performing cooling operation or heating operation. In this case, in the air cleaning operation, only the fan 26 is driven while the flow of refrigerant in the refrigerant circuit is stopped.

(Configuration of ventilation system 12)
The ventilation device 12 ventilates the indoor space S1. Specifically, the ventilation device 12 of this embodiment is a device that performs a type of ventilation, and simultaneously discharges indoor air and supplies outdoor air. The ventilation device 12 is operated in conjunction with the air conditioner 11 or independently.

As shown in FIG. 1, the ventilation device 12 is connected to the outdoor space S2 and the indoor space S1 via ducts 45a to 45d. The ventilation device 12 has a casing having a substantially rectangular box shape. A heat exchanger 32, an exhaust fan 33, and an air supply fan 34 are housed within the casing. The casing 31 is provided with a return air intake 44 , an exhaust outlet 42 , an outside air intake 43 , and a supply air outlet 41 .

The return air intake port 44 is used to take air (return air) RA from the indoor space S1 into the casing 31. The exhaust outlet 42 is used to discharge the return air RA taken into the casing 31 to the outdoor space S2 as exhaust EA. The outside air intake port 43 is used to take in air (outside air) OA from the outdoor space S2 into the casing 31. The air supply outlet 41 is used to supply outside air OA taken into the casing 31 to the indoor space S1 as air supply SA.

The outside air intake port 43 and the exhaust outlet 42 are connected to the outdoor space S2 via ducts 45a and 45b, respectively. The return air intake port 44 and the supply air outlet 41 are connected to the indoor space S1 via ducts 45d and 45c.

Inside the casing 31, the return air RA taken in from the return air intake port 44 passes through the heat exchanger 32 and is discharged as exhaust EA from the exhaust outlet 42 to the outdoor space S2. The outside air OA taken in from the outside air intake port 43 passes through the heat exchanger 32, and is supplied as supply air SA from the supply air outlet 41 to the indoor space S1.

The heat exchanger 32 is an orthogonal total heat exchanger. The heat exchanger 32 exchanges sensible heat and latent heat (total heat exchange) between the air flowing from the return air intake 44 to the exhaust outlet 42 and the air flowing from the outside air intake 43 to the supply air outlet 41. I do. Thereby, it is possible to suppress fluctuations in indoor temperature and humidity due to air supplied indoors from outside through the heat exchanger 32.

The exhaust fan 33 is arranged near the exhaust outlet 42. By driving this exhaust fan 33, a flow of air flowing from the return air intake 44 to the exhaust outlet 42 is generated. The air supply fan 34 is arranged near the air supply outlet 41. By driving the air supply fan 34, a flow of air flowing from the outside air intake port 43 to the air supply outlet 41 is generated.

As shown in FIG. 2, the ventilation device 12 includes a controller 36 (hereinafter also referred to as a ventilation controller). The ventilation controller 36 controls the operation of the exhaust fan 33 and the air supply fan 34. The ventilation controller 36 is composed of a microcomputer or the like that includes a control section 36a such as a CPU, and a storage section 36b such as RAM or ROM. The ventilation controller 36 exhibits a predetermined function when the control unit 36a executes a program installed in the storage unit 36b. The ventilation controller 36 may include an integrated circuit such as an FPGA or an ASIC.

The ventilation device 12 is provided with a temperature sensor 61, a humidity sensor 62, a CO ₂ sensor (carbon dioxide concentration detection sensor) 63, and an air volume sensor 64. Temperature sensor 61 and humidity sensor 62 detect indoor temperature and humidity, respectively. The CO ₂ sensor 63 detects the concentration of CO ₂ (carbon dioxide) indoors. The air volume sensor 64 detects the volume of air blown out from the exhaust fan 33 and the air supply fan 34 . The detected values of each sensor 61 to 64 are input to the ventilation controller 36. Note that the air volume of the exhaust fan 33 and the intake fan 34 may be determined from the current value flowing through the motor of each fan 33, 34 and the ventilation resistance of the ducts 45a to 45d.

The ventilation controller 36 controls the operation of the exhaust fan 33 and the air supply fan 34 so that the indoor CO ₂ concentration is below a set value. The upper limit of indoor CO ₂ concentration is determined by predetermined standards such as building environmental hygiene management standards, standards, laws and regulations, etc., and the ventilation controller 36 sets a set value (described later) that can satisfy these standards. 1 density) is held in the storage section 36b. The amount of indoor ventilation required is also determined by laws and regulations such as the Building Standards Act, and is determined using, for example, the amount of ventilation required per person and the number of people in the room. The ventilation controller 36 stores in the storage unit 36b the required ventilation amount that can be determined using the indoor capacity (maximum number of people) and the required ventilation amount per person.

(Explanation of interlocking control)
In the air processing system 10 of this embodiment, the air cleaning unit 28 provided in the indoor unit 22 and the ventilation device 12 can be operated in conjunction with each other. This interlocking operation is performed based on the following reason.

As mentioned above, the required amount of indoor ventilation is determined by laws and regulations, and in recent years, it has been recommended to increase the required amount of ventilation from the viewpoint of preventing infectious diseases caused by viruses and bacteria. Therefore, existing ventilation equipment may not be able to meet the recommended required ventilation amount (hereinafter also referred to as "recommended ventilation amount"). On the other hand, even if the amount of ventilation by the ventilation device satisfies the recommended ventilation amount, if the situation where the ventilation device must always be operated at maximum airflow continues, energy consumption will increase and operating costs will increase.

The air cleaning unit 28 is considered to have the same function as ventilation in terms of reducing and removing pollutants present in the room. Therefore, the air processing system 10 of the present embodiment regards the throughput of the air purifying unit 28 as the indoor ventilation amount, and supplements the recommended ventilation amount that cannot be covered by the ventilation device 12 with the throughput of the air purifying unit 28, or In order to reduce energy consumption of the device 12, the air cleaning unit 28 is operated in conjunction with the ventilation device 12.

Hereinafter, control of the interlocking operation of the ventilation device 12 and the air cleaning unit 28 will be explained in detail.
As shown in FIGS. 1 and 2, the air processing system 10 includes a controller 60 (hereinafter also referred to as "interlock controller") that controls the interlocking operation of the ventilation device 12 and the air purifying unit 28. The interlocking controller 60 is composed of a microcomputer or the like including a control section 60a such as a CPU, and a storage section 60b such as RAM or ROM. The interlocking controller 60 performs a predetermined function when the control unit 60a executes a program installed in the storage unit 60b. The interlocking controller 60 may include an integrated circuit such as an FPGA or an ASIC. The interlock controller 60 is communicably connected to the air conditioning controller 24 and the ventilation controller 36 by wire or wirelessly.

As described above, in order to consider the air cleaning by the air cleaning unit 28 as ventilation, it is necessary to convert the amount of air cleaned by the air cleaning unit 28 into the amount of indoor ventilation. Therefore, the interlocking controller 60 calculates the throughput amount (equivalent ventilation amount; deemed ventilation amount) of the air processing system 10 that corresponds to the indoor ventilation amount. In this embodiment, by multiplying the air volume of the air purifying unit 28 (the air volume of the fan 26) by a predetermined correction coefficient, the throughput of the air purifying unit 28 converted to the ventilation amount is determined. As this correction coefficient, for example, the efficiency of dust collection by the air cleaning unit 28 can be adopted. The interlocking controller 60 interlocks and controls the ventilation device 12 and the air purification unit 28 so that the sum of the ventilation amount by the ventilation device 12 and the throughput of the air purification unit 28 becomes the recommended ventilation amount. In other words, the interlock controller 60 interlocks and controls the ventilation device 12 and the air cleaning unit 28 so that the following equations (1) and (2) are satisfied.

Q=Q1+Q2... (1)
Q2=α×Q3… (2)
However, Q is the recommended ventilation volume, Q1 is the ventilation volume (air volume) of the ventilation device 12, Q2 is the amount of air processed by the air purification unit 28 (equivalent ventilation volume), Q3 is the air volume of the air purification unit 28, and α is the correction coefficient. It is.

The interlocking controller 60 can switch and execute a plurality of operation modes depending on the indoor CO ₂ concentration and load (temperature, humidity, amount (concentration) of pollutants, etc.). Specifically, the interlocking controller 60 of this embodiment has a "ventilation priority mode" which prioritizes ventilation, a "balance mode" which considers the balance between ventilation and air purification, and a "purification mode" which prioritizes air purification over ventilation. "priority mode" can be executed.

When the indoor CO ₂ concentration is higher than a predetermined set value (upper limit), it is necessary to quickly lower the CO ₂ concentration. In such a case, the interlock controller 60 executes the ventilation priority mode to promote indoor ventilation and reduce the CO ₂ concentration. Specifically, the interlocking controller 60 instructs the ventilation controller 36 to operate the ventilation system 12 at the maximum ventilation amount (air volume) until the indoor CO ₂ concentration falls below the set value, thereby reducing the indoor CO 2 concentration in a short time. _2. Lower the concentration below the set value.

During execution of the ventilation priority mode, the air purifying unit 28 is operated from the viewpoint of whether or not the required indoor ventilation amount (recommended ventilation amount) is satisfied. Specifically, when the recommended ventilation amount Q is not satisfied by the ventilation device 12 alone, the air purifying unit 28 is operated with a throughput amount (equivalent ventilation amount) Q2 corresponding to the insufficient ventilation amount. Conversely, when the recommended ventilation amount Q is satisfied only by the ventilation device 12, the air purifying unit 28 is not operated under interlock control. In this case, the air purifying unit 28 is operated by the air conditioning controller 24 according to the degree of contamination of the indoor air, for example, the detection value of the dust sensor 54 or the odor sensor 55.

When the indoor CO ₂ concentration is below the set value, it is sufficient to maintain at least that state, so it is possible to reduce the ventilation amount Q1 of the ventilation device 12. Therefore, the interlock controller 60 switches the operation from the ventilation priority mode to the balance mode. The balance mode is a mode in which the recommended ventilation amount is maintained while balancing the ventilation amount Q1 of the ventilation device 12 and the throughput amount Q2 of the air purifying unit 28. In this balance mode, the ventilation amount Q1 by the ventilator 12 is reduced from the ventilation priority mode, and the throughput Q2 of the air purifying unit 28 compensates for the amount that is insufficient to the recommended ventilation amount Q due to this reduction. In other words, when the CO ₂ concentration is below the set value, operation is performed to increase the throughput Q2 of the air purifying unit 28 while decreasing the ventilation amount Q1 of the ventilation device 12.

When the ventilation amount Q1 by the ventilation device 12 and the throughput amount Q2 of the air cleaning unit 28 are the same, the energy consumption of the ventilation device 12 is larger than that of the air cleaning unit 28. Therefore, in the balance mode, energy consumption can be reduced more than in the ventilation priority mode while satisfying the recommended ventilation amount Q. In this respect, the balance mode can also be called an "energy saving mode" that reduces energy consumption.

Ventilating a room can increase the temperature, humidity, and concentration of pollutants inside the room due to air coming in from outside. In other words, ventilating the room may increase the load inside the room. If these loads become too large, there is a possibility that people in the room will feel uncomfortable. The air processing system 10 of this embodiment switches from the balance mode to the cleanliness priority mode when the indoor load exceeds a predetermined value during the linked operation. In this cleanliness priority mode, the throughput amount Q2 of the air cleaning unit 28 is made larger than the ventilation amount Q1 of the ventilation device 12, and the indoor load is actively reduced.

The control procedure for the interlocking operation of the air treatment system 10 will be described below. FIG. 3 is a flowchart showing a control procedure for interlocking operation of the air treatment system.
When the interlocking controller 60 receives an input of an instruction for interlocking operation via the remote controller 25 or the like, it determines whether or not it has received a human detection signal from the human detection sensor 53 in step S11 of FIG. A detection signal from the human detection sensor 53 is transmitted from the air conditioning controller 24 to the interlocking controller 60.

When the interlocking controller 60 determines that a person in the room has been detected, it sets the required indoor ventilation amount in step S12. When the person detection sensor 53 detects only the presence or absence of a person in the room, the interlock controller 60 sets the maximum required ventilation amount assuming that there are people in the room up to the capacity. When the number of people can be detected by the person detection sensor 53, the interlocking controller 60 determines and sets the required indoor ventilation amount from the required ventilation amount per person and the number of people. In addition, if the number of people detected by the person detection sensor 53 exceeds the capacity, the interlocking controller 60 displays, for example, a message on the display section of the remote controller 25 that the capacity is exceeded, and asks if the window of room R should be opened. You may also be notified that ventilation is encouraged.

The interlocking controller 60 operates the air treatment system 10 in the ventilation priority mode in step S13. The ventilation priority mode is a mode in which the ventilation device 12 is operated at the maximum air volume, as described above. In step S14, the interlocking controller 60 determines whether the indoor CO ₂ concentration is below a predetermined first concentration. This first concentration is the upper limit of the indoor CO ₂ concentration specified by laws and regulations, and is stored in the storage section 36b of the ventilation controller 36 as a CO ₂ concentration setting value. The first concentration value is sent from the ventilation controller 36 to the interlock controller 60 .

If the determination in step S14 is affirmative (Yes), the interlocking controller 60 advances the process to step S15, and if the determination is negative (No), it repeats the same process. In step S15, the interlocking controller 60 switches from the ventilation priority mode to the balance mode and operates the ventilation device 12 and the air cleaning unit 28. As described above, in the balance mode, the ventilation amount by the ventilation device 12 is reduced from the ventilation priority mode, the air is purified by operating the air purification unit 28, and the shortfall in the recommended ventilation amount is compensated for by the throughput. However, in this balance mode, the throughput of the air purifying unit 28 does not exceed the ventilation amount of the ventilation device 12, resulting in an operation that favors ventilation, and can further reduce the indoor CO ₂ concentration. Furthermore, in the balance mode, the throughput of the air purifying unit 28 may be gradually increased while gradually reducing the ventilation amount of the ventilation device 12, or when switching from the ventilation priority mode to the balance mode, the ventilation device 12 The ventilation amount of the air purifying unit 28 may be decreased by a certain amount, the throughput of the air purifying unit 28 may be increased by a certain amount, and this state may be continued.

Next, in step S16, the interlocking controller 60 determines whether the indoor CO ₂ concentration is equal to or lower than a predetermined second concentration. This second concentration is lower than the first concentration. If the determination in step S16 is affirmative (Yes), the interlocking controller 60 advances the process to step S17.

In step S17, the interlock controller 60 determines whether the indoor load due to the introduction of outside air by the ventilation device 12 is equal to or higher than a predetermined value. As this load, for example, the amount (concentration) of dust detected by the dust sensor 54 can be adopted. Moreover, in addition to or in place of this, indoor temperature or humidity can also be employed as the indoor load. If the judgment in step S17 is affirmative (Yes), the interlocking controller 60 advances the process to step S18, and if the judgment is negative (No), returns the process to step S16.

In step S18, the interlocking controller 60 switches from the balance mode to the cleanliness priority mode and operates the ventilation device 12 and the air cleaning unit 28. Specifically, the interlocking controller 60 further reduces the ventilation amount Q1 by the ventilation device 12 and further increases the throughput Q2 of the air purifying unit 28, thereby making the throughput Q2 larger than the ventilation amount Q1. Thereby, it is possible to further reduce energy consumption in the linked operation while actively removing the indoor load. Note that when the indoor load exceeds a predetermined threshold value, the throughput Q2 of the air purifying unit 28 is further increased so that the sum of the ventilation amount Q1 and the throughput Q2 exceeds the recommended ventilation amount Q. It's okay. In other words, the throughput Q2 of the air purifying unit 28 may be larger than the throughput to satisfy the recommended ventilation amount Q. This allows the indoor load to be rapidly reduced.

In step S19, the interlocking controller 60 determines whether a predetermined time has elapsed since the cleanliness priority mode was executed. If the predetermined time has elapsed, the process returns to step S13 and is switched to ventilation priority mode. The reason why such switching is performed is that if the cleanliness priority mode with a small ventilation amount Q2 is performed for a long time, there is a high possibility that the indoor CO ₂ concentration will increase. The interlock controller 60 repeatedly executes the above control procedure until receiving an instruction to stop the interlock operation.

[Second embodiment]
FIG. 4 is a schematic configuration diagram of an air treatment system according to a second embodiment of the present disclosure. FIG. 5 is a block diagram of the control system of the air treatment system.
In the air processing system 10 according to the first embodiment, the air purifying device was constituted by an air purifying unit 28 built into the air conditioner 11, but in the air processing system 10 according to the present embodiment, the air purifying device An air purifying device 65 exclusively for cleaning is provided. This air cleaning device 65 includes a fan 66, a filter 67, a cleaning device 68, and a casing 69 that accommodates these. The cleaning device 68 decomposes and removes dust, bacteria, viruses, odor components, etc. attached to the filter 67. The air purifier 65 is installed on the floor, wall, etc. indoors. However, similarly to the first embodiment, the air purifier 65 may be installed in the space S3 under the ceiling. The air cleaning device 65 only needs to include a filter 67 that can remove at least dust.

As shown in FIG. 5, the air cleaning device 65 further includes a controller 70 (hereinafter also referred to as "air cleaning controller"), a dust sensor 71, and an odor sensor 72. Like the air conditioning controller 24 described above, the air purification controller 70 is configured by, for example, a microcomputer including a control section 70a such as a CPU, and a storage section 70b such as a RAM or ROM. The air purification controller 70 exhibits a predetermined function when the control unit 70a executes a program installed in the storage unit 70b. The air purification controller 70 may include an integrated circuit such as FPGA or ASIC. The air purification controller 70 is communicatively connected to the controller 36 of the ventilation system 12 and the interlock controller 60.

The air processing system 10 of this embodiment, like the air processing system 10 of the first embodiment, performs interlocking operation of the ventilation device 12 and the air purifying device 65 according to the control procedure shown in FIG. Since the air purifying device 65 of this embodiment does not include the human detection sensor 53, step S11 in FIG. 3 is not performed, and steps S12 to S19 are performed. In this case, in step S12, the interlocking controller 60 sets the maximum required ventilation amount assuming that there are up to the capacity of people in the room. The other configurations are the same as those in the first embodiment.

[Other embodiments]
The air treatment system 10 is not limited to those described in the first and second embodiments, and can be modified as appropriate. For example, in the embodiments described above, the air purifiers 28 and 65 were provided with the dust sensor 54 and the odor sensor 55, but it is sufficient if they are provided with at least the dust sensor 54. The air processing system 10 does not necessarily have to include the interlock controller 60, and the interlock operation performed by the interlock controller 60 of the above embodiment can be performed by the controller 24 of the ventilation device 12 or the controllers of the air purifiers 28 and 65. 24, 70 may be executed. The ventilation device 12 may be provided with a heat exchanger 32 that performs heat exchange of air with a refrigerant instead of a total heat exchanger. The ventilation device 12 does not need to include the heat exchanger 32. The ventilation device 12 of the above embodiment is a first-class ventilation device that uses a fan to both supply air into the room and exhaust air to the outdoors. It may be a type 2 ventilation system that exhausts air outdoors naturally, or a type 3 ventilation system that exhausts air outdoors with a fan and leaves air supply to the room naturally. In the above embodiment, the indoor load that increases with the introduction of outside air, such as indoor temperature, humidity, amount of dust, etc., is detected by sensors provided in the ventilation device 12 and the air purifiers 28 and 60. However, it may be detected using a sensor provided outdoors or in the ducts 45a to 45d.

[Operations and effects of embodiment]
(1) The air processing system 10 of the above embodiment includes a ventilation device 12 that performs indoor ventilation, an air processing device (air purifier) 28, 65 that purifies the indoor air, and a ventilation device 12 and an air purifier. A controller (interlocking controller 60, air conditioning controller 24, ventilation controller 36, or air purification controller 70) that controls the devices 28, 65, and the controllers 60, 24, 36, 70 control the ventilation amount Q1 of the ventilation device 12 and The ventilation device 12 and the air processing devices 28, 65 are controlled so that the total amount with the throughput Q2 of the air processing devices 28, 65 becomes a predetermined amount (recommended ventilation amount) Q. The air processing devices 28 and 65 can be considered to have the same function as ventilation in that they purify the indoor air (remove indoor pollutants, etc.). Therefore, in the above embodiment, in addition to the ventilation amount Q1 by the ventilation device 12, the throughput amount Q2 of the air purifiers 28 and 65 is also considered as the indoor ventilation amount, and the sum of these is the predetermined amount Q, for example, according to laws and regulations. The ventilation device 12 and the air processing devices 28, 65 are controlled to achieve the indoor ventilation amount recommended or mandated by, etc. Therefore, for example, even if the predetermined amount Q is not satisfied by the ventilation device 12 alone, it is possible to satisfy the predetermined amount Q by also taking into consideration the throughput Q2 by the air processing devices 28 and 65.

(2) In the above embodiment, the ventilation device 12 includes the concentration detection sensor 63 that detects the indoor carbon dioxide concentration, and the controllers 60, 24, 36, and 70 control the indoor carbon dioxide concentration to a predetermined first concentration. The ventilation device 12 is controlled as follows. As a result, when the indoor carbon dioxide concentration exceeds a predetermined first concentration, for example, an upper limit specified by laws and regulations, the ventilation amount Q1 of the ventilation device 12 is set to reduce the indoor carbon dioxide concentration. can be controlled.

(3) In the above embodiment, the controllers 60, 24, 36, and 70 determine that the indoor carbon dioxide concentration is equal to or lower than the second concentration, which is lower than the first concentration, and that the indoor load due to the introduction of outside air is lower than a predetermined value. is also large, the proportion of the throughput Q2 of the air processing devices 28 and 65 is made larger than the proportion of the ventilation amount Q1 of the ventilation device 12. As a result, if the carbon dioxide concentration is below the second concentration, there is little need to further reduce the carbon dioxide concentration, so if the indoor load due to the introduction of outside air is large, the throughput Q2 of the air processing devices 28 and 65 can be reduced. It is possible to increase the load and reduce the load.

(4) In the above embodiment, when the indoor carbon dioxide concentration is below the first concentration and exceeds the second concentration, the controller 60, 24, 36, 70 controls the air processing device while reducing the ventilation amount Q1 by the ventilation device 12. 28 and 65 is increased.

According to the above configuration, when the indoor carbon dioxide concentration is not below the second concentration but below the first concentration, the amount of air treated by the air processing devices 28 and 65 is reduced while reducing the ventilation amount Q1 by the ventilation device 12. By increasing Q2, it is possible to cope with an increase in the indoor load due to the introduction of outside air without significantly changing the indoor ventilation amount including the throughput amount Q2.

(5) In the above embodiment, when the indoor load due to the introduction of outside air is larger than a predetermined value, the controllers 60, 24, 36, 70 change the processing amount Q2 of the air processing devices 28, 65 to the predetermined amount Q. The throughput of the air processing devices 28 and 65 is increased to meet the above requirements. As a result, even if the sum of the ventilation amount Q1 of the ventilation device 12 and the throughput amount Q2 of the air processing devices 28 and 65 satisfies the predetermined amount (recommended ventilation amount) Q, the indoor load due to the introduction of outside air When is larger than the predetermined value, the throughput Q2 of the air processing devices 28 and 65 can be further increased, and the indoor load can be quickly reduced.

(6) In the above embodiment, the air processing system 10 further includes the person detection sensor 53 that detects people in the room, and the controllers 60, 24, 36, and 70 control the predetermined amount of Q based on the detection result of the person detection sensor 53. Determine. Thereby, the predetermined amount Q can be appropriately set depending on the situation of people in the room.

Note that the present disclosure is not limited to the above examples, but is indicated by the scope of the claims, and is intended to include all changes within the meaning and scope equivalent to the scope of the claims.

10: Air processing system 12: Ventilation device 24: Air conditioning controller 28: Air cleaning unit (air cleaning device; air processing device)
36: Ventilation controller 53: Person detection sensor 60: Interlocking controller 63: CO2 sensor (concentration detection sensor)
64: Sensor 65: Air cleaning device (air processing device)
70: Air purification controller Q: Recommended ventilation amount (predetermined amount)
Q1: Ventilation amount Q2: Processing amount

Claims (6)

a ventilation device (12) that ventilates the room;
an air processing device (28, 65) that purifies the indoor air;
A controller (60, 24, 36, 70) that controls the ventilation device (12) and the air treatment device (28, 65),
The controller (60, 24, 36, 70) determines that the sum of the ventilation amount (Q1) of the ventilation device (12) and the throughput amount (Q2) of the air processing device (28, 65) is a predetermined amount (Q). An air treatment system that controls the ventilation device (12) and the air treatment device (28, 65) so that the ventilation device (12) and the air treatment device (28, 65) are controlled. The ventilation device (12) has a concentration detection sensor (63) that detects the indoor carbon dioxide concentration,
The air processing system according to claim 1, wherein the controller (60, 24, 36, 70) controls the ventilation device (12) so that the carbon dioxide concentration indoors is equal to or lower than a predetermined first concentration. The controller (60, 24, 36, 70) controls the controller (60, 24, 36, 70) when the indoor carbon dioxide concentration is below a second concentration lower than the first concentration and the indoor load due to the introduction of outside air is larger than a predetermined value. 3. The air treatment system according to claim 2, wherein a proportion of the throughput (Q2) of the air treatment device (28, 65) is made larger than a proportion of the ventilation amount (Q1) of the ventilation device (12). The controller (60, 24, 36, 70) is configured to reduce the ventilation amount (Q1) by the ventilation device (12) when the indoor carbon dioxide concentration is equal to or lower than the first concentration and exceeds the second concentration. The air treatment system according to claim 3, which increases the throughput (Q2) of the air treatment device (28, 65). The controller (60, 24, 36, 70) changes the processing amount (Q2) of the air processing device (28, 65) by the predetermined amount ( The air treatment system according to any one of claims 1 to 4, wherein the throughput of the air treatment device (28, 65) is increased to meet Q). further comprising a person detection sensor (53) for detecting a person in the room,
The air treatment according to any one of claims 1 to 4, wherein the controller (60, 24, 36, 70) determines the predetermined amount (Q) based on the detection result of the human detection sensor (53). system.

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