JP7183074B2 - ventilation system - Google Patents

Description

The present invention relates to a ventilation system that includes an air supply section, an exhaust section, a detection section that detects the amount of dirt in the air, and a dust collection section that collects dirt in the air.

Conventionally, when air is supplied from the outdoors into the room, in order to prevent dirt such as dust, pollen, and fine particulate matter contained in the outdoor air from being supplied indoors, collectors such as electrostatic precipitators have been installed in the supply air path. Air conditioners provided with dust means are used. Microparticulate matter is also called PM (Particulate Matter) 2.5.

For example, Patent Literature 1 discloses an air conditioner that removes contaminants in the outdoor air by arranging an electric dust collector in an air passage that takes in air from the outdoors into the room. The air conditioner of Patent Literature 1 includes two charging sections, an air-path-side charging section and an indoor-side charging section, as charging sections that constitute an electrostatic precipitator. Then, the air conditioner controls the voltage applied to the two charging units, the airway-side charging unit and the indoor-side charging unit, detects the current values of the airway-side charging unit and the indoor-side charging unit, If the current value does not change, it is assumed that only dirt with a small particle size is included, and if the current value of the indoor charging section changes, it is assumed that dirt with a large particle size is included, and the particle size is identified. Based on the identified results, the air conditioner slows down the speed of the air blower that draws air from the outdoors into the room only when it contains large particles. It improves the dust collection efficiency by improving the charging rate of

Japanese Patent Application Laid-Open No. 2008-213711

However, in the technique disclosed in Patent Literature 1, the voltage applied to the two charging units, ie, the airway-side charging unit and the indoor-side charging unit, is controlled, and the voltage applied to the two charging units, ie, the airway-side charging unit and the indoor-side charging unit Since the speed of the air blowing means is controlled by identifying the particle size of the dirt based on the change in the current value, there is a problem that the configuration and control are complicated.

In addition, the technology disclosed in Patent Document 1 only adjusts the speed of the air blowing means for taking air into the room. becomes negative pressure, making it difficult to open the door.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ventilation system in which the indoor pressure is adjusted and the dust collection efficiency is improved by a simple configuration and control.

In order to solve the above-described problems and achieve the object, the ventilation system according to the present invention has an air supply unit for supplying outdoor air into the room and an exhaust unit for discharging the indoor air to the outside. A ventilation device that ventilates the room, a first dirt amount acquisition unit that acquires the amount of dirt in the outdoor air, an electric dust collector that collects dirt in the outdoor air that flows into the air supply unit, and a person in the room. A human detection unit that detects presence or absence, and a control unit that controls the amount of air supplied from the air supply unit and the amount of exhaust air from the exhaust unit. If the amount of dirt in the outdoor air flowing into the electric dust collector is greater than the reference value based on the acquisition result of the first dirt amount acquisition unit, the control unit determines the air supply air volume of the air supply unit and the exhaust air of the exhaust unit. Based on the result of detection of a person in the room by the human detection unit, the degree of reduction of the supply air volume of the air supply unit and the exhaust air volume of the exhaust unit is controlled.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ventilation system which improved dust collection efficiency while adjusting indoor pressure by simple structure and control.

A diagram showing the configuration of a ventilation system according to Embodiment 1 of the present invention. 1 is a diagram showing an example of a hardware configuration of a processing circuit according to the first embodiment of the present invention; FIG. 1 is a flow chart showing a procedure for controlling ventilation operation in a ventilation system according to Embodiment 1 of the present invention; FIG. 2 is a diagram showing conditions for reducing the supply air volume and the exhaust air volume in the ventilation system according to the first embodiment of the present invention; FIG. 4 is a flow chart showing the control procedure for ventilation operation according to the condition setting table shown in FIG. 4 in the ventilation system according to the first embodiment of the present invention; The figure which shows the structure of the ventilation system concerning Embodiment 2 of this invention. Flowchart showing a procedure for controlling ventilation operation in a ventilation system according to Embodiment 2 of the present invention Flowchart showing another control procedure for ventilation operation in the ventilation system according to the second embodiment of the present invention FIG. 11 is a diagram showing conditions for reducing the supply air volume and the exhaust air volume in the ventilation system according to the second embodiment of the present invention; FIG. 10 is a flow chart showing the control procedure for ventilation operation according to the condition setting table shown in FIG. 9 in the ventilation system according to the second embodiment of the present invention; The figure which shows the structure of the ventilation system concerning Embodiment 3 of this invention. The figure which shows the structure of the ventilation system concerning Embodiment 4 of this invention. Flowchart showing the procedure for controlling the ventilation operation in the ventilation system according to the fourth embodiment of the present invention Flowchart showing the procedure for controlling the ventilation operation in the ventilation system according to the fourth embodiment of the present invention The figure which shows the structure of the ventilation system concerning Embodiment 5 of this invention. Flowchart showing the procedure for controlling the ventilation operation in the ventilation system according to the fifth embodiment of the present invention Flowchart showing the control procedure of another ventilation operation in the ventilation system according to the fifth embodiment of the present invention

Below, the ventilation system concerning an embodiment of the invention is explained in detail based on a drawing. In addition, this invention is not limited by this embodiment.

Embodiment 1.
FIG. 1 is a diagram showing the configuration of a ventilation system 100 according to Embodiment 1 of the present invention. FIG. 1 describes a case where an electric dust collector 14, which is a dust collector, is provided outside a heat exchange ventilator 1, which is a ventilator, and used. In addition, FIG. 1 shows the structure seen when one surface of the outdoor air supply duct 15a, the indoor air exhaust duct 16b, and the heat exchange ventilator 1 is seen through.

A ventilation system 100 according to the first embodiment includes a heat exchange ventilator 1 , an electric dust collector 14 , and an outdoor dirt amount detector 17 .

First, the heat exchange ventilator 1 will be described. The heat exchange ventilator 1 is installed in the space above the ceiling or in the space between the outer wall and the inner wall, and ventilates the room, which is the space to be ventilated, by supplying and exhausting air through the connected duct. The heat exchanging ventilator 1 is supplied with drive power from a power source (not shown).

The heat exchange ventilator 1 includes a housing 1a forming a main body. An outdoor inlet 10, an outdoor outlet 11, an indoor inlet 12, and an indoor outlet 13 are provided on the side surface of the housing 1a.

The outdoor inlet 10, the outdoor outlet 11, the indoor inlet 12 and the indoor outlet 13 are connected to ducts. The outdoor air inlet 10 and the outdoor air outlet 11 are provided on one side surface 1b of the housing 1a and communicate with the outdoor space via a duct that communicates with the outside of the building. The indoor air outlet 13 and the indoor air inlet 12 are provided on the other side 1c of the housing 1a facing the one side 1b, and are communicated with the indoor space via a duct that communicates with the interior of the room.

An outdoor air supply duct 15a communicating with the outdoors is connected to the outdoor air inlet 10 . An indoor-side air supply duct 15 b communicating with the interior of the room is connected to the indoor air outlet 13 . The indoor air inlet 12 is connected to an indoor exhaust duct 16b that communicates with the interior of the room. The outdoor outlet 11 is connected to an outdoor exhaust duct 16a communicating with the outdoors.

A heat exchanger 2, an air supply fan 3, an exhaust fan 4, an air supply side air filter 6, an exhaust side air filter 7, a partition wall 21, a partition wall 22, a partition wall 23 and a partition A wall 24 is provided.

In the heat exchange element, which is the heat exchanger 2, a heat exchanger supply air passage 2a through which the supply air flows and a heat exchanger exhaust air passage 2b through which the exhaust air flows are formed independently of each other. The heat exchanger supply air passage 2 a and the heat exchanger exhaust air passage 2 b are provided to cross each other in the heat exchanger 2 . Thereby, the heat exchanger 2 is capable of exchanging heat and humidity between the air flowing through the heat exchanger supply air passage 2a and the air flowing through the heat exchanger exhaust air passage 2b. In Embodiment 1, the heat exchanger supply air passage 2 a and the heat exchanger exhaust air passage 2 b are provided orthogonally in the heat exchanger 2 . That is, in the heat exchanger 2, the traveling direction of the air flowing through the heat exchanger supply air passage 2a is orthogonal to the traveling direction of the air flowing through the heat exchanger exhaust air passage 2b.

In the inside of the housing 1a, an air supply air passage connecting the outdoor air inlet 10 and the indoor air outlet 13 via the heat exchanger air supply air passage 2a of the heat exchanger 2, and the heat exchanger exhaust air of the heat exchanger 2 are provided. An exhaust air passage that connects the indoor air inlet 12 and the outdoor air outlet 11 through the air passage 2b is formed independently of each other. That is, in the inside of the housing 1a, an air supply air passage for supplying air from the outside of the building to the room by connecting the outside of the building and the room through the outdoor air inlet 10 and the indoor air outlet 13, An exhaust air passage is provided for connecting the outside of the building through the indoor air inlet 12 and the outdoor air outlet 11 to exhaust indoor air to the outdoors.

The air supply air path is divided into an upstream air supply air path 31a, the heat exchanger air supply air path 2a described above, and a downstream air supply air path 31b. The upstream air supply air passage 31 a is an air supply air passage on the upstream side of the heat exchanger 2 , and is a ventilation passage for air supply flow from the outdoor air inlet 10 to the heat exchanger 2 . The heat exchanger supply air passage 2 a is a ventilation passage for the supply air flow in the heat exchanger 2 . The downstream supply air passage 31 b is an air supply passage on the downstream side of the heat exchanger 2 and is a ventilation passage for the supply air flow from the heat exchanger 2 to the indoor outlet 13 . The supply airflow is a flow of outdoor air that is sucked from the outdoor air inlet 10 and then blown out from the indoor air outlet 13 to supply the indoor air. In FIG. 1 , the dashed arrow A indicates the air supply flow.

The exhaust air passage is divided into an upstream exhaust air passage 32a, the heat exchanger exhaust air passage 2b described above, and a downstream exhaust air passage 32b. The upstream exhaust air passage 32 a is an exhaust air passage on the upstream side of the heat exchanger 2 and is a ventilation passage for exhaust flow from the indoor air inlet 12 to the heat exchanger 2 . The heat exchanger exhaust air passage 2 b is a ventilation passage for the exhaust flow in the heat exchanger 2 . The downstream exhaust air passage 32 b is an exhaust air passage on the downstream side of the heat exchanger 2 and is a ventilation passage for exhaust flow from the heat exchanger 2 to the outdoor outlet 11 . The exhaust flow is a flow of indoor air that is sucked from the indoor air inlet 12 and then blown out from the outdoor air outlet 11 to be exhausted to the outside. In FIG. 1, the exhaust flow is indicated by a solid arrow B. As shown in FIG.

The upstream supply air passage 31a and the upstream exhaust air passage 32a are separated by the heat exchanger 2 and the partition wall 21 inside the housing 1a. The downstream supply air passage 31b and the downstream exhaust air passage 32b are partitioned by the heat exchanger 2 and the partition wall 22 inside the housing 1a. The upstream supply air passage 31a and the downstream exhaust air passage 32b are partitioned by the heat exchanger 2 and the partition wall 23 inside the housing 1a. The upstream exhaust air passage 32a and the downstream air supply air passage 31b are separated by the heat exchanger 2 and the partition wall 24 inside the housing 1a.

On the downstream side of the air supply path, that is, on the downstream side air supply path 31b, there is an air supply fan 3 that is driven by an air supply fan motor to generate an air supply flow from the inlet end to the outlet end of the air supply path. It has been incorporated. By driving the air supply blower 3, the outdoor air is sucked from the outdoor air inlet 10, passes through the heat exchanger 2, and is supplied from the indoor outlet 13 into the indoor space.

Further, on the downstream side of the exhaust air passage, that is, in the downstream exhaust air passage 32b, there is an exhaust fan 4 that is driven by an exhaust fan motor to generate an exhaust flow from the inlet end to the outlet end of the exhaust air passage. It has been incorporated. By driving the exhaust air blower 4 , indoor air is sucked from the indoor air inlet 12 , passes through the heat exchanger 2 , and is exhausted from the outdoor air outlet 11 to the outdoor space.

The air supply side air filter 6 is detachably installed on the surface of the heat exchanger 2 into which the air supply flows. The air supply side air filter 6 is provided for the purpose of preventing clogging of the heat exchanger 2 with airborne matter such as dust, pollen, and fine particulate matter mixed in the outdoor air. The air supply side air filter 6 collects dust that could not be collected by the electric dust collector 14, which will be described later, but it is difficult to clean if it becomes clogged. It is common to do

The exhaust-side air filter 7 is detachably installed on the surface of the heat exchanger 2 into which the exhaust flow flows. The exhaust-side air filter 7 is provided for the purpose of preventing clogging of the heat exchanger 2 with airborne matter such as dust, pollen, and fine particulate matter mixed in the indoor air. It is difficult to wash the exhaust side air filter 7 when it is clogged, and it is common to replace it after using it for a certain period of time.

In FIG. 1, the symbol OA is outdoor air, the symbol SA is supply air, the symbol RA is return air, and the symbol EA is exhaust air. there is

Outside air OA flows from the outdoors through the outdoor air supply duct 15a and into the upstream air supply air passage 31a from the outdoor suction port 10 . The supply air flow that has flowed into the upstream supply air passage 31 a reaches the indoor outlet 13 via the supply air filter 6 , the heat exchanger 2 and the air supply blower 3 . The supply airflow that has reached the indoor air outlet 13 is blown out into the room as supply air SA via the indoor-side air supply duct 15b.

The return air RA flows from the room into the upstream exhaust air passage 32a from the indoor air inlet 12 via the indoor exhaust duct 16b. The exhaust flow that has flowed into the upstream exhaust air passage 32 a reaches the outdoor outlet 11 via the exhaust air filter 7 , the heat exchanger 2 , and the exhaust fan 4 . The exhaust flow that has reached the outdoor outlet 11 is blown out to the outside as the exhaust EA through the outdoor-side exhaust duct 16a.

An electric dust collector 14 is provided in the middle of the outdoor air supply duct 15a. The electric dust collector 14 has a charge section and a dust collection section, and forms a discharge space by applying a voltage of, for example, 10 kV to the charge section. Dirt in the air passing through the discharge space is positively or negatively charged, and the dust is collected by being attracted to the dust collecting portion having the opposite potential to the charged dirt by Coulomb force. In general, the charge section and the dust collection section can be cleaned by washing with water or the like, so replacement is unnecessary.

An outdoor dirt amount detector 17 is installed upstream of the electric dust collector 14 in the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 is a detection unit that detects the amount of dirt in the outdoor air flowing into the electric dust collector 14, and is a first dirt amount detection unit. That is, the outdoor dirt amount detection unit 17 is a first dirt amount acquisition unit that acquires information on the amount of dirt in the outdoor air. The amount of contaminants is the amount of contaminants in the air that can be cleaned by the electrostatic precipitator 14 , specifically, the amount of airborne substances present in the air that can be cleaned by the electrostatic precipitator 14 .

The outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 at a predetermined cycle. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The information on the predetermined period may be stored in the outdoor dirt amount detection unit 17 and may be changed as appropriate.

Further, the outdoor dirt amount detection unit 17 transmits information about the amount of dirt in the outdoor air, which is the detection result, to the control unit 5 . Communication between the outdoor dirt amount detection unit 17 and the control unit 5 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication. The outdoor dirt amount detection unit 17 uses a detection device capable of detecting the amount of dirt in the air, such as a PM2.5 sensor and a dust sensor.

Further, a controller 5 for controlling the operation of the heat exchanging ventilator 1 is arranged on one side surface of the housing 1a. The controller 5 can communicate with the air supply fan 3 and the exhaust fan 4 and controls the operation of the air supply fan 3 and the exhaust fan 4 . The control unit 5 outputs an operation instruction signal for instructing operation and a stop instruction signal for instructing stop to the air supply fan 3 and the exhaust fan 4, thereby controlling the air supply fan 3 and the exhaust fan 4. It controls the operation of 4. That is, the control unit 5 functions as a control unit that controls the operations of the air supply fan 3 and the exhaust fan 4 .

Further, while the heat exchange ventilator 1 is operating, that is, while the air supply fan 3 and the exhaust fan 4 are operating, the control unit 5 controls the air supply fan 3 and the exhaust fan 4 based on the amount of dirt in the outdoor air. Control is performed to reduce the air volume of the blower 4 . Note that the control unit 5 may be provided inside the housing 1a.

Also, the control unit 5 is implemented as, for example, a processing circuit having the hardware configuration shown in FIG. FIG. 2 is a diagram illustrating an example of a hardware configuration of a processing circuit according to the first embodiment of the present invention; Control unit 5 is implemented, for example, by processor 101 shown in FIG. 2 executing a program stored in memory 102 . Also, multiple processors and multiple memories may work together to achieve the above functions. Also, part of the functions of the control unit 5 may be implemented as an electronic circuit, and other parts may be realized using the processor 101 and the memory 102 .

A remote controller 25 that can communicate with the control unit 5 is connected to the control unit 5 . The remote controller 25 receives commands for various controls such as the ventilation operation of the heat exchange ventilator 1 . The remote controller 25 transmits various commands received from the user to the control unit 5 . The control unit 5 controls the ventilation operation and the like of the heat exchange ventilator 1 based on various commands transmitted from the remote controller 25 . Communication between the remote controller 25 and the control unit 5 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication.

In the ventilation system 100 described above, the air supply air passage that connects the outdoor air inlet 10 and the indoor air outlet 13 via the heat exchanger air supply air passage 2a of the heat exchanger 2 and the air supply blower 3 constitutes an air supply unit that supplies air to the room. In addition, the exhaust air passage that connects the indoor air inlet 12 and the outdoor air outlet 11 through the heat exchanger air outlet 2b of the heat exchanger 2 and the exhaust air blower 4 are an exhaust unit that exhausts the indoor air to the outside. configure.

Next, the operation of the ventilation system 100 according to Embodiment 1 of the present invention will be described. FIG. 3 is a flow chart showing the procedure for controlling the ventilation operation in the ventilation system 100 according to Embodiment 1 of the present invention.

First, the ventilation operation of the ventilation system 100 is started. When the user operates the remote controller 25 , an operation instruction signal for ventilation operation is transmitted from the remote controller 25 to the control unit 5 . The control unit 5 transmits operation commands to the air supply fan 3 and the exhaust fan 4 according to the operation instruction signal transmitted from the remote controller 25 . The air supply fan 3 and the exhaust fan 4 start operating in accordance with the operation command sent from the controller 5 . Thereby, the ventilation operation of the ventilation system 100 is started. At the start of the ventilation operation of the ventilation system 100, the air supply volume and the exhaust air volume are the same. The air supply air volume is the air volume of the air supply fan 3 , that is, the air volume of the air supply flow generated by the air supply fan 3 . The exhaust air volume is the air volume of the exhaust fan 4 , that is, the air volume of the exhaust flow generated by the exhaust fan 4 .

When the ventilation operation of the ventilation system 100 is started, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 at a predetermined cycle in step S10. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the control unit 5 .

When the control unit 5 receives the detection result of the amount of dirt in the outdoor air, in step S20, based on the predetermined first threshold and the detection result, the amount of dirt in the outdoor air is equal to or less than the first threshold. It is determined whether or not. The first threshold is a reference value for the control unit 5 to determine whether to reduce the air supply volume and the exhaust air volume. The first threshold is stored in advance in the control unit 5 and can be changed as appropriate by operating the remote controller 25 . Also, a switch for changing the first threshold value may be provided separately.

If the amount of dirt in the outdoor air is equal to or less than the first threshold value, that is, if Yes in step S20, the process returns to step S10. When the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17 is equal to or less than the first threshold value, even if the outdoor air passes through the electric dust collector 14 for a short time, Objects can be properly collected by the electrostatic precipitator 14, and purified air can be supplied indoors. In this case, the control unit 5 performs control to maintain the air supply air volume and the exhaust air volume without changing them.

For example, when the heat exchange ventilator 1 capable of ventilation operation with two notches of air volume, that is, high operation with high air volume and weak operation with low air volume, is in high operation, the control unit 5 performs high operation to control to continue ventilation operation.

On the other hand, if the amount of dirt in the outdoor air is greater than the first threshold, that is, if No in step S20, the process proceeds to step S30.

In step S<b>30 , the control unit 5 performs control to reduce the amount of supplied air by reducing the amount of air supplied by the air supply blower 3 . When the amount of dirt in the outdoor air is greater than the first threshold value, airborne matter in the outdoor air can be properly collected by the electric dust collector 14 if the outdoor air passes through the electric dust collector 14 for a short time. can't Therefore, the control unit 5 reduces the amount of supplied air so that the outdoor air passes through the electric dust collector 14 longer than before the amount of supplied air is changed. By making the time for the outdoor air to pass through the electric dust collector 14 longer than before the change in the air supply air volume, the dust collection efficiency of the airborne matter in the outdoor air passing through the electric dust collector 14 is increased before the change in the air supply air volume. It is possible to supply more purified air to the room by improving the air quality.

Further, when only the amount of supplied air is reduced, there arises a problem that the pressure inside the room becomes negative, making it difficult to open the door. Therefore, in step S40, the control unit 5 performs control to reduce the air supply volume and simultaneously reduce the exhaust air volume to the same air volume as the supply air volume. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

That is, for example, when the heat exchange ventilator 1 capable of ventilation operation with two notches of air volume, that is, high operation and low operation, is in high operation, the control unit 5 increases the air volume notch by one step. It is controlled to lower it and perform ventilation operation with weak operation.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S50. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the control unit 5 .

The control unit 5 receives a new detection result of the dirt amount in the outdoor air from the outdoor dirt amount detection unit 17 . In step S60, the control unit 5 determines whether or not the amount of dirt in the outdoor air is equal to or less than the first threshold based on the newly received detection result of the amount of dirt in the outdoor air from the outdoor dirt amount detection unit 17. judge.

If the amount of dirt in the outdoor air is greater than the first threshold value, that is, if No in step S60, the process returns to step S50.

On the other hand, if the amount of dirt in the outdoor air flowing into the electrostatic precipitator 14 is equal to or less than the first threshold value, that is, if Yes in step S60, the process proceeds to step S70. In step S70, the control unit 5 performs control to return the supply air volume to the original state before it was reduced in step S30, and performs control to return the exhaust air volume to the original state before it was reduced in step S40. As a result, a ventilation operation is performed in which the air supply air volume and the exhaust air volume are the same air volume as in the original state. After step S70, the process returns to step S10.

In the above description, the heat exchange ventilator 1 capable of two-notch ventilation operation, strong operation and weak operation, has been described as an example, but the heat exchange device 1 is capable of ventilation operation by switching the air volume notch to three different air volume notches. In the case of the ventilation device 1, the control unit 5 stores in advance a threshold corresponding to the first threshold for each ventilation operation with a different air volume notch, and gradually increases the air volume notch as the amount of dirt in the outdoor air increases. may be controlled to lower to a weak air volume notch.

In addition, as the amount of dirt in the outdoor air increases, the control unit 5 controls the amount of air supply and the amount of exhaust air to be reduced in direct proportion to the amount of dirt in the outdoor air. You may perform the control which reduces steplessly with respect to.

As described above, the ventilation system 100 can easily and automatically control the amount of supplied air based on the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17 . Then, the ventilation system 100 reduces the amount of supplied air when the amount of dirt in the outdoor air is greater than the first threshold, so that the electrostatic precipitator 14 always maintains the dust collection efficiency of airborne matter in the outdoor air. It can be kept high.

In addition, since the ventilation system 100 reduces the air supply volume and the exhaust air volume at the same time, the pressure in the room can be kept constant, and the imbalance between the supply air volume and the exhaust air volume makes it difficult for the door to open. It is possible to prevent the occurrence of problems such as Furthermore, by reducing the air supply air volume and the exhaust air volume, the power consumption of the ventilation system 100 is reduced, the maintenance frequency of the electrostatic precipitator 14 is reduced due to the reduction in the amount of dirt taken in for a certain period of time, and the heat exchange efficiency of the heat exchanger 2. effect such as improvement of Furthermore, since the dust collection efficiency of the electric dust collector 14 is improved, the service life of the air supply side air filter 6 installed in the rear stage of the electric dust collector 14 can be extended or eliminated.

Even if the air supply air volume and the exhaust air volume are not the same air volume, the air supply air volume can be reduced by decreasing both the air supply air volume and the exhaust air volume compared to the case where only the air supply air volume is decreased. It is possible to suppress the degree of negative pressure in the room caused by

FIG. 1 shows a case where one outdoor dirt amount detection unit 17 is installed in the middle of the outdoor air supply duct 15a. The installation location of the outdoor dirt amount detection unit 17 is not limited. Also, the number of outdoor dirt amount detection units 17 is not limited. It may be the amount of dirt in the air.

Further, the outdoor dirt amount detection unit 17 is not limited to a sensor, and may be a receiving unit for acquiring the amount of dirt in the outdoor air from another device through communication or the like. That is, the first dirt amount acquisition unit that acquires information on the amount of dirt in the outdoor air may be a reception unit that acquires information on the amount of dirt in the outdoor air from another device through communication or the like. The receiving unit transmits to the control unit 5 the detection result of the amount of dirt in the outdoor air obtained from another device.

Further, the ventilation system 100 according to the first embodiment may include a human detection unit 19 for detecting the presence or absence of a person in the room as shown in FIG. . The human detection unit 19 transmits the detection result of presence/absence of a person to the control unit 5 . For example, a human sensor is used for the human detection unit 19 .

FIG. 4 is a diagram showing conditions for reducing the supply air volume and the exhaust air volume in the ventilation system 100 according to the first embodiment of the present invention. When only the amount of dirt in the outdoor air is to be detected, conditions such as the condition setting table shown in FIG. 4 are set. The condition setting table shown in FIG. 4 is stored in the control unit 5 in advance. The control unit 5 controls the degree of reduction of the supply air volume and the exhaust air volume based on the conditions set in the condition setting table shown in FIG.

The notation of "high" in FIG. 4 indicates the case where the amount of dirt in the outdoor air is greater than the first threshold, and the notation of "low" indicates the case where the amount of dirt in the outdoor air is less than or equal to the first threshold. . Conditions 1, 2, 3, and 4 set in the condition setting table shown in FIG. 4 are conditions that specify different air volumes. In the conditions set in the condition setting table shown in FIG. 4<Condition 3<Condition 2<Condition 1”. In addition, regarding the conditions 3 and 4, since the outdoor air is less polluted, it may be set in advance to "no change in supply air volume and exhaust air volume" or "stop".

In the condition setting table shown in FIG. 4, when Condition 1 is satisfied, the reduction degree of the air supply air volume and the exhaust air volume is maximized, and the dust collection efficiency of the electric dust collector 14 is set to be the highest. As a result, when there are people indoors and the amount of dirt in the outdoor air is greater than the first threshold value, the dust collection efficiency of the electric dust collector 14 can be maximized. , it is possible to provide cleaner air.

Next, the operation of the ventilation system 100 according to the condition setting table shown in FIG. 4 will be described. FIG. 5 is a flow chart showing a control procedure for ventilation operation according to the condition setting table shown in FIG. 4 in the ventilation system 100 according to the first embodiment of the present invention.

When the ventilation operation of the ventilation system 100 is started, a process similar to that of step S10 is performed in step S110.

Upon receiving the detection result of the amount of dirt in the outdoor air, the controller 5 determines in step S120 whether or not the amount of dirt in the outdoor air is equal to or less than the first threshold, as in step S20. If the amount of dirt in the outdoor air is greater than the first threshold value, that is, if No in step S120, the process proceeds to step S130. If the amount of dirt in the outdoor air is equal to or less than the first threshold, that is, if Yes in step S120, the process proceeds to step S180.

At step S130, the control unit 5 determines whether or not there is a person in the room. That is, the human detection unit 19 detects the presence or absence of a person in the room, and transmits the detection result to the control unit 5 . Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S130, the process proceeds to step S140. If there is no person in the room, that is, if No in step S130, the process proceeds to step S170.

In step S140, the control unit 5 determines condition 1 as the air volume condition to be applied to reduce the supply air volume and the exhaust air volume based on the result of detection of presence or absence of people in the room and the condition setting table shown in FIG. do.

In step S170, the control unit 5 determines condition 2 as the air volume condition to be applied to reduce the supply air volume and the exhaust air volume, based on the result of detecting the presence or absence of people in the room and the condition setting table shown in FIG. do.

On the other hand, if Yes in step S120, in step S180, the control unit 5 determines whether or not there is a person in the room. That is, the human detection unit 19 detects the presence or absence of a person in the room, and transmits the detection result to the control unit 5 . Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S180, the process proceeds to step S190. If there is no person in the room, that is, if No in step S180, the process proceeds to step S200.

In step S190, the control unit 5 determines condition 3 as the air volume condition to be applied to reduce the supply air volume and the exhaust air volume based on the detection result of presence or absence of people in the room and the condition setting table shown in FIG. do.

In step S200, the control unit 5 determines condition 4 as the air volume condition to be applied to reduce the supply air volume and the exhaust air volume based on the result of detection of the presence or absence of people in the room and the condition setting table shown in FIG. do.

In step S150, the control unit 5 sets the supply air volume to a supply air volume corresponding to the condition determined in step S140, step S170, step S190, or step S200. That is, the control unit 5 performs control to change the air volume of the air supply fan 3 to the air volume corresponding to the conditions determined in step S140, step S170, step S190, or step S200.

Next, in step S160, the controller 5 changes the air supply volume and at the same time sets the exhaust air volume to the same air volume as the air supply volume. That is, the control unit 5 performs control to change the air volume of the exhaust fan 4 to the same air volume as the air volume of the air supply fan 3 . After that, the process returns to step S110.

Note that FIG. 4 shows an example of conditions when performing control to reduce the amount of air supply and the amount of exhaust air. Arbitrary conditions may be set, such as a condition that emphasizes the amount of dirt rather than the presence or absence of dirt.

The ventilation system 100 according to the first embodiment described above automatically reduces the amount of air supply and the amount of exhaust air when the amount of dirt in the outdoor air is greater than the first threshold, and the dust collection efficiency of the electric dust collector 14 is reduced. can be improved. As a result, the ventilation system 100 can easily perform a ventilation operation in which the amount of dirt in the indoor air is less than the current amount of dirt in the indoor air, and it is possible to clean the indoor air more efficiently. .

In addition, the ventilation system 100 performs control to automatically reduce the exhaust air volume to the same air volume as the supply air volume when the air supply air volume is reduced based on the amount of dirt in the outdoor air. As a result, the ventilation system 100 can keep the indoor pressure constant even when the ventilation operation is performed by reducing the air supply air volume based on the amount of dirt in the outdoor air, and the air supply air volume is reduced. There is no problem that the door becomes difficult to open due to

In addition, the electric dust collector 14 of the ventilation system 100 does not have a complicated configuration such as having a plurality of charging units, and can clean the air by collecting suspended matter in the air with a simple configuration and simple control. is. In addition, since the ventilation system 100 reduces the amount of air supply based on the amount of dirt in the outdoor air, there is no restriction on the size of airborne objects when the amount of air supply is reduced.

Therefore, the ventilation system 100 according to the first embodiment can improve the dust collection efficiency while adjusting the indoor pressure with a simple configuration and control, and can clean the indoor air more efficiently.

Embodiment 2.
FIG. 6 is a diagram showing the configuration of a ventilation system 200 according to Embodiment 2 of the present invention. FIG. 6 is a diagram corresponding to FIG. In FIG. 6, the case where the electric dust collector 14 is connected to the heat exchange ventilator 1 and used will be described as an example. The ventilation system 200 according to the second embodiment differs from the ventilation system 100 according to the first embodiment described above in that an indoor dirt amount detection unit 18 is further provided.

The indoor dirt amount detection unit 18 is a detection unit that detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1, and is a second dirt amount detection unit. That is, the indoor dirt amount detection unit 18 is a second dirt amount acquisition unit that acquires information on the amount of dirt in the indoor air.

The indoor dirt amount detection unit 18 is arranged in the indoor exhaust duct 16b and detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1 at a predetermined cycle. That is, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. Information on the predetermined period may be stored in the indoor dirt amount detection unit 18 and may be changed as appropriate. Also, the indoor dirt amount detection unit 18 transmits the detection result to the control unit 5 . Communication between the indoor dirt amount detection unit 18 and the control unit 5 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication.

A detection device capable of detecting the amount of dirt in the air, such as a PM2.5 sensor and a dust sensor, is used as the indoor dirt amount detection unit 18 . The detection device used for the indoor dirt amount detection unit 18 is the same type of sensor as the outdoor dirt amount detection unit 17 . This allows the ventilation system 200 to compare the amount of dirt in the outdoor air and the amount of dirt in the indoor air.

When the control unit 5 receives the detection result of the outdoor dirt amount detection unit 17 and the detection result of the indoor dirt amount detection unit 18, the control unit 5 detects the amount of dirt in the outdoor air, which is the detection result of the outdoor dirt amount detection unit 17, and the indoor dirt amount. The amount of dirt in the indoor air, which is the result of detection by the amount detection unit 18, is compared.

When the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, there is no possibility that the outdoor air supplied to the room will pollute the indoor air. Therefore, when the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, the control unit 5 performs control to perform the ventilation operation set by the user, that is, the circulation operation set by the user.

On the other hand, if the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, the outdoor air supplied to the room may pollute the indoor air. Therefore, when the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, the control unit 5 adjusts the amount of air supply and the amount of exhaust air to the setting of the circulation operation currently being performed, that is, the amount set by the user. Perform control to reduce the ventilation operation setting.

That is, the control unit 5 reduces the amount of supplied air so that the outdoor air passes through the electric dust collector 14 longer than before the amount of supplied air is changed. By making the time for the outdoor air to pass through the electric dust collector 14 longer than before the change in the air supply air volume, the dust collection efficiency of the airborne matter in the outdoor air passing through the electric dust collector 14 is increased before the change in the air supply air volume. It is possible to supply more purified air to the room by improving the air quality.

Further, when only the amount of supplied air is reduced, there arises a problem that the pressure inside the room becomes negative, making it difficult to open the door. Therefore, the control unit 5 performs control to reduce the exhaust air volume to the same air volume as the supply air volume. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

Next, operation of the ventilation system 200 according to the second embodiment of the present invention will be explained. FIG. 7 is a flow chart showing a control procedure for ventilation operation in the ventilation system 200 according to the second embodiment of the present invention.

When the ventilation operation of the ventilation system 200 is started, a process similar to that of step S10 is performed in step S310.

Further, in step S320, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1 at a predetermined cycle. That is, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. The indoor dirt amount detection unit 18 transmits the detection result to the control unit 5 .

The control unit 5 receives the detection result of the dirt amount in the outdoor air detected by the outdoor dirt amount detection unit 17 and the detection result of the dirt amount in the indoor air detected by the indoor dirt amount detection unit 18 . In step S330, the control unit 5 compares the detection result of the amount of dirt in the outdoor air and the detection result of the amount of dirt in the indoor air, and determines whether the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air. determine whether or not

If the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, that is, if Yes in step S330, the process returns to step S310.

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S330, the process proceeds to step S340. In step S340, the controller 5 performs control to reduce the amount of supplied air. If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, the outdoor air supplied to the room may pollute the indoor air. For this reason, the control unit 5 reduces the amount of supplied air so that the time for the outdoor air to pass through the electric dust collector 14 is longer than before the change in the amount of supplied air. As a result, the ventilation system 200 improves the dust collection efficiency of airborne matter in the outdoor air passing through the electric dust collector 14 compared to before the change in the amount of supplied air, and supplies cleaner air indoors. can be done.

Further, when only the amount of supplied air is reduced, there arises a problem that the pressure inside the room becomes negative, making it difficult to open the door. Therefore, in step S350, the control unit 5 performs control to reduce the exhaust air volume to the same air volume as the supply air volume. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S360. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the control unit 5 .

Further, in step S<b>370 , the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1 . That is, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. The indoor dirt amount detection unit 18 transmits the detection result to the control unit 5 .

The control unit 5 detects the newly detected amount of dirt in the outdoor air by the outdoor dirt amount detection unit 17 and the newly detected amount of dirt in the indoor air by the indoor dirt amount detection unit 18. receive. In step S380, based on the newly received detection result of the amount of dirt in the outdoor air and the newly received detection result of the amount of dirt in the indoor air, the control unit 5 determines that the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air. It is determined whether or not it is equal to or less than the dirt amount.

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S380, the process returns to step S360.

If the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, that is, if Yes in step S380, the process proceeds to step S390. In step S390, the controller 5 performs control to return the supply air volume to the original state before it was reduced in step S340. Further, the control unit 5 performs control to return the exhaust air volume to the original state before it was reduced in step S350. As a result, a ventilation operation is performed in which the air supply air volume and the exhaust air volume are the same air volume as in the original state. After step S390, the process returns to step S310.

In the above-described control, based on the result of comparison between the amount of dirt in the outdoor air and the amount of dirt in the indoor air, if there is a risk that the outdoor air supplied to the room may pollute the room, the amount of air supplied and the amount of exhaust air The dust collection efficiency of the electric dust collector 14 can be improved by automatically reducing the air volume. As a result, the ventilation system 200 can easily perform a ventilation operation in which the amount of dirt in the indoor air is reduced to the current amount of dirt in the indoor air or less, and it is possible to clean the indoor air more efficiently.

Further, in the above-described control, when the amount of air supplied by the air supply blower 3 is reduced based on the comparison result between the amount of dirt in the outdoor air and the amount of dirt in the indoor air, the exhaust air volume is set to the same amount as the air supply air volume. Perform control to automatically reduce the air volume. As a result, the ventilation system 200 keeps the indoor pressure constant even when the ventilation operation is performed by reducing the amount of supplied air based on the result of comparing the amount of dirt in the outdoor air and the amount of dirt in the indoor air. Therefore, there is no problem that the door becomes difficult to open due to a reduction in the amount of supplied air.

In the above description, the case of comparing the amount of dirt in the outdoor air and the amount of dirt in the indoor air was explained. Air volume and exhaust air volume may be controlled. Also, a switch may be provided so that the threshold can be arbitrarily set. For example, set a lower threshold in places with dirty air, such as cities, and set a higher threshold in places with clean air.

FIG. 8 is a flow chart showing another control procedure for ventilation operation in the ventilation system 200 according to the second embodiment of the present invention.

When the ventilation operation of ventilation system 200 is started, the same processing as step S10 is performed in step S410.

In step S420, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1 at a predetermined cycle. That is, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. The indoor dirt amount detection unit 18 transmits the detection result to the control unit 5 .

Upon receiving the detection result of the amount of dirt in the outdoor air, the control unit 5 determines in step S430 whether the amount of dirt in the outdoor air is equal to or less than the first threshold based on the first threshold and the detection result. determine whether

If the amount of dirt in the outdoor air is equal to or less than the first threshold, that is, if Yes in step S430, the process returns to step S410. When the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17 is equal to or less than the first threshold value, even if the outdoor air passes through the electric dust collector 14 for a short time, Objects can be properly collected by the electrostatic precipitator 14, and purified air can be supplied indoors. In this case, the control unit 5 performs control to maintain the air supply air volume and the exhaust air volume without changing them.

On the other hand, if the amount of dirt in the outdoor air is greater than the first threshold, that is, if No in step S430, the process proceeds to step S440. Upon receiving the detection result of the amount of dirt in the indoor air, the control unit 5 detects the amount of dirt in the room air based on the predetermined second threshold value and the detection result of the amount of dirt in the room air in step S440. A determination is made whether the amount is less than or equal to a second threshold. The second threshold is a reference value for the controller 5 to determine whether or not to reduce the supply air volume and the exhaust air volume. The second threshold is, for example, the same value as the first threshold. The second threshold is stored in advance in the control unit 5 and can be changed as appropriate by operating the remote controller 25 . Also, a switch for changing the second threshold may be provided separately.

If the amount of dirt in the indoor air is greater than the second threshold value, that is, if No in step S440, the process returns to step S410.

On the other hand, if the amount of dirt in the indoor air is equal to or less than the second threshold value, that is, if Yes in step S440, the process proceeds to step S450. In step S450, the controller 5 performs control to reduce the amount of supplied air. When the amount of dirt in the outdoor air is greater than the first threshold and the amount of dirt in the indoor air is equal to or less than the second threshold, there is a high possibility that the outdoor air supplied to the room will pollute the indoor air. For this reason, the control unit 5 reduces the amount of supplied air so that the time for the outdoor air to pass through the electric dust collector 14 is longer than before the change in the amount of supplied air. As a result, the ventilation system 200 improves the dust collection efficiency of airborne matter in the outdoor air passing through the electric dust collector 14 compared to before the change in the amount of supplied air, and supplies cleaner air indoors. can be done.

Further, when only the amount of supplied air is reduced, there arises a problem that the pressure inside the room becomes negative, making it difficult to open the door. Therefore, in step S460, the control unit 5 performs control to reduce the exhaust air volume to the same air volume as the air supply air volume of the air supply fan 3. FIG. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S470. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the control unit 5 .

In step S480, the control unit 5 determines whether the amount of dirt in the outdoor air is equal to or less than the first threshold based on the newly received detection result of the amount of dirt in the outdoor air from the outdoor dirt amount detection unit 17. judge.

If the amount of dirt in the outdoor air is greater than the first threshold, that is, if No in step S480, the process returns to step S470.

On the other hand, if the amount of dirt in the outdoor air is equal to or less than the first threshold value, that is, if Yes in step S480, the process proceeds to step S490.

In step S490, the control unit 5 performs control to return the supply air volume to the original state before it was reduced in step S450, and performs control to return the exhaust air volume to the original state before it was reduced in step S460. As a result, a ventilation operation is performed in which the air supply air volume and the exhaust air volume are the same air volume as in the original state. After step S490, the process returns to step S410.

In the control described above, it is possible to easily and automatically control the amount of supplied air based on the amount of dirt in the outdoor air and the amount of dirt in the indoor air. Then, the ventilation system 200 automatically reduces the air supply air volume when the amount of dirt in the outdoor air is greater than the first threshold and the amount of dirt in the indoor air is equal to or less than the second threshold, and the electric dust collector It is possible to improve the dust collection efficiency of airborne matter in the outdoor air at 14 .

Further, the ventilation system 200 according to the second embodiment may determine whether or not there is a person in the room by the human detection unit 19 . FIG. 9 is a diagram showing conditions for reducing the supply air volume and the exhaust air volume in the ventilation system 200 according to the second embodiment of the present invention. When detecting the amount of dirt in outdoor air and the amount of dirt in indoor air, conditions such as the condition setting table shown in FIG. 9 are set. The condition setting table shown in FIG. 9 is stored in the control unit 5 in advance. Based on the conditions set in the condition setting table shown in FIG. 9, the control unit 5 performs control to change the degree of reduction of the supply air volume and the exhaust air volume.

The notation of "high" for the amount of dirt in the outdoor air in FIG. A case where the dirt amount is equal to or less than the first threshold is shown. The notation of "high" for the amount of dirt in the indoor air in FIG. A case where the dirt amount is equal to or less than the second threshold is shown.

Conditions 11, 12, 13, 14, 15 and 16 set in the condition setting table shown in FIG. 9 are conditions specifying different air volumes. In the conditions set in the condition setting table shown in FIG. The magnitude relation is "Condition 16<Condition 15<Condition 14<Condition 13<Condition 12<Condition 11".

In the condition setting table shown in FIG. 9, when the condition 11 is satisfied, the degree of reduction of the supply air volume and the exhaust air volume is maximized, and the dust collection efficiency of the electric dust collector 14 is set to the highest. As a result, when the amount of dirt in the outdoor air is greater than the first threshold, the amount of dirt in the indoor air is equal to or less than the second threshold, and there are people indoors, the dust collection efficiency of the electric dust collector 14 is maximized. It can be made taller and can provide cleaner air in a room where people are present.

Next, the operation of the ventilation system 200 according to the condition setting table shown in FIG. 9 will be explained. FIG. 10 is a flow chart showing a control procedure for ventilation operation according to the condition setting table shown in FIG. 9 in the ventilation system 200 according to the second embodiment of the present invention.

When the ventilation operation of ventilation system 200 is started, the same processing as step S10 is performed in step S510.

In step S520, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing into the heat exchange ventilator 1 at a predetermined cycle. That is, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. The indoor dirt amount detection unit 18 transmits the detection result to the control unit 5 .

Upon receiving the detection result of the dirt amount in the outdoor air, the control unit 5 determines in step S530 whether the dirt amount in the outdoor air is equal to or less than the first threshold based on the first threshold and the detection result. determine whether If the amount of dirt in the outdoor air is greater than the first threshold, that is, if No in step S530, the process proceeds to step S540. If the amount of dirt in the outdoor air is equal to or less than the first threshold, that is, if Yes in step S530, the process proceeds to step S630.

In step S540, the controller 5 determines whether or not the amount of dirt in the indoor air is equal to or less than the second threshold based on the second threshold and the detection result of the amount of dirt in the room air. If the amount of dirt in the indoor air is equal to or less than the second threshold value, that is, if Yes in step S540, the process proceeds to step S550. If the amount of dirt in the indoor air is greater than the second threshold, that is, if No in step S540, the process proceeds to step S600.

In step S<b>550 , the human detection unit 19 detects the presence or absence of a person in the room, and transmits the detection result to the control unit 5 . Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S550, the process proceeds to step S560. If there is no person in the room, that is, if No in step S550, the process proceeds to step S590.

In step S560, the control unit 5 determines condition 11 as the condition to be applied to reduce the supply air volume and the exhaust air volume based on the determination results thus far and the condition setting table shown in FIG.

At step S590, the control unit 5 determines condition 12 as the condition to be applied to reduce the supply air volume and the exhaust air volume based on the results of determination so far and the condition setting table shown in FIG.

On the other hand, if No in step S540, the human detection unit 19 detects the presence or absence of a person in the room and transmits the detection result to the control unit 5 in step S600. Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S600, the process proceeds to step S610. If there is no person in the room, that is, if No in step S600, the process proceeds to step S620.

At step S610, the control unit 5 determines condition 13 as the condition to be applied to the reduction of the supply air volume and the exhaust air volume based on the results of determination so far and the condition setting table shown in FIG.

At step S620, the control unit 5 determines condition 14 as a condition to be applied to reduce the supply air volume and the exhaust air volume based on the determination results thus far and the condition setting table shown in FIG.

Further, in the case of Yes in step S530, in step S630, the controller 5 determines that the amount of dirt in the indoor air is equal to or less than the second threshold based on the second threshold and the detection result of the amount of dirt in the room air. Determine whether or not If the amount of dirt in the indoor air is greater than the second threshold, that is, if No in step S630, the process proceeds to step S640. If the amount of dirt in the indoor air is equal to or less than the second threshold, that is, if Yes in step S630, the process proceeds to step S670.

In step S<b>640 , the human detection unit 19 detects the presence or absence of a person in the room, and transmits the detection result to the control unit 5 . Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S640, the process proceeds to step S650. If there is no person in the room, that is, if No in step S640, the process proceeds to step S660.

At step S650, the control unit 5 determines condition 15 as a condition to be applied to reduce the supply air volume and the exhaust air volume based on the determination results thus far and the condition setting table shown in FIG.

At step S660, the control unit 5 determines condition 16 as the condition to be applied to reduce the supply air volume and the exhaust air volume based on the results of determination so far and the condition setting table shown in FIG.

If Yes in step S630, the human detection unit 19 detects the presence or absence of a person in the room and transmits the detection result to the control unit 5 in step S670. Then, the control unit 5 determines whether or not there is a person in the room based on the result of detection of the presence or absence of a person in the room by the person detection unit 19 . If there are people in the room, that is, if Yes in step S670, the process proceeds to step S680. If there is no person in the room, that is, if No in step S670, the process proceeds to step S690.

In steps S680 and S690, the control unit 5 sets the conditions to be applied to the reduction of the supply air volume and the exhaust air volume based on the determination results thus far and the condition setting table shown in FIG. , to determine. In this case, the control unit 5 performs control to stop the air supply fan 3 and the exhaust fan 4, or control to maintain the air volume of the air supply fan 3 and the air volume of the exhaust fan 4 without changing. . After step S680 and after step S690, the process returns to step S510.

In step S570, the control unit 5 sets the supply air volume to a supply air volume corresponding to the condition determined in step S560, step S590, step S610, step S620, step S650, or step S660. . That is, the control unit 5 controls the supply air volume of the air supply fan 3 to change the supply air volume corresponding to the conditions determined in step S560, step S590, step S610, step S620, step S650, or step S660. I do.

Next, in step S580, the control unit 5 changes the air supply air volume of the air supply fan 3 and simultaneously sets the exhaust air volume to the same air volume as the air supply air volume. That is, the control unit 5 performs control to change the air volume of the exhaust fan 4 to the same air volume as the air volume of the air supply fan 3 . After that, the process returns to step S510.

In the control described above, it is possible to easily and automatically control the air supply air volume based on the amount of dirt in the outdoor air, the amount of dirt in the indoor air, and the presence or absence of people in the room. As a result, when there are people in the room, the ventilation system 200 can increase the dust collection efficiency of the electric dust collector 14 based on the amount of dirt in the outdoor air and the amount of dirt in the indoor air. It is possible to provide more purified air indoors.

FIG. 9 shows an example of conditions under which control is performed to reduce the amount of air supply and the amount of exhaust air. Any condition may be set, such as a condition in which the amount of dirt is emphasized rather than the presence or absence of people in the room.

Also, FIG. 6 shows a case where one indoor dirt amount detection unit 18 is installed in the indoor exhaust duct 16b. The installation location of the detection unit 18 is not limited. Also, there is no limit to the number of indoor dirt amount detection units 18 . For example, a plurality of indoor dirt amount detection units 18 may be installed in the room, and the average of the detection results detected by each indoor dirt amount detection unit 18 may be used as the amount of dirt in the indoor air.

Further, the indoor dirt amount detection unit 18 is not limited to a sensor, and may be a receiver for acquiring the amount of dirt in the indoor air from another device through communication or the like. That is, the second dirt amount acquisition unit that acquires the information on the amount of dirt in the indoor air may be a reception unit that acquires the information on the amount of dirt in the room air from another device through communication or the like. The receiving unit transmits to the control unit 5 detection results of the amount of dirt in the indoor air obtained from other devices. Further, the outdoor dirt amount detection unit 17 and the indoor dirt amount detection unit 18 may be replaced with one receiving unit that acquires the dirt amount detection result in the outdoor air and the dirt amount detection result in the indoor air. In this case, it is possible to set only one device for acquiring the detection result of the dirt amount in the outdoor air and the detection result of the dirt amount in the indoor air.

Ventilation system 200 according to the second embodiment of the present invention described above, based on the result of comparison between the amount of dirt in the outdoor air and the amount of dirt in the indoor air, there is a risk that the outdoor air supplied indoors will pollute the room. If there is, the dust collection efficiency of the electric dust collector 14 can be improved by automatically reducing the amount of supplied air. As a result, the ventilation system 200 can easily perform a ventilation operation in which the amount of dirt in the indoor air is reduced to the current amount of dirt in the indoor air or less, and it is possible to clean the indoor air more efficiently.

In addition, the ventilation system 200 automatically reduces the exhaust air volume to the same air volume as the supply air volume when the air supply air volume is reduced based on the comparison result between the amount of dirt in the outdoor air and the amount of dirt in the indoor air. control. As a result, the ventilation system 200 keeps the indoor pressure constant even when the ventilation operation is performed by reducing the amount of supplied air based on the result of comparing the amount of dirt in the outdoor air and the amount of dirt in the indoor air. Therefore, there is no problem that the door becomes difficult to open due to a reduction in the amount of supplied air.

Embodiment 3.
FIG. 11 is a diagram showing the configuration of a ventilation system 300 according to Embodiment 3 of the present invention. The ventilation system 300 according to the third embodiment incorporates the electric dust collector 14, the outdoor dirt amount detection unit 17, and the indoor dirt amount detection unit 18 in the heat exchange ventilation device 1, which is a ventilation device. 1 or the ventilation system 200 according to the second embodiment. In addition, in FIG. 11, the structure seen when one side of the heat exchange ventilator 1 is seen through is shown.

The electric dust collector 14 is provided between the air supply side air filter 6 and the outdoor air inlet 10 in the upstream side air supply air passage 31a. The outdoor dirt amount detection unit 17 is provided between the outdoor suction port 10 and the electric dust collector 14 in the upstream air supply air passage 31a. The indoor dirt amount detection unit 18 is provided between the exhaust-side air filter 7 and the indoor suction port 12 in the upstream exhaust air passage 32a.

In the ventilation system 300 according to the third embodiment, the arrangement positions of the electric dust collector 14, the outdoor dirt amount detection unit 17, and the indoor dirt amount detection unit 18 are the ventilation system 100 according to the first embodiment or the ventilation system according to the second embodiment. Although different from the system 200, the same operation as the ventilation system 100 according to the first embodiment or the ventilation system 200 according to the second embodiment is possible, and the ventilation system 100 according to the first embodiment or the ventilation system 200 according to the second embodiment An effect similar to that of the ventilation system 200 is obtained.

In addition, since the ventilation system 300 according to the third embodiment is configured such that the electric dust collector 14, the outdoor dirt amount detection unit 17, and the indoor dirt amount detection unit 18 are built in the heat exchange ventilation device 1, the ventilation system 100 Alternatively, in the installation work of the ventilation system 200, the electric dust collector 14, the outdoor dirt amount detection unit 17, and the indoor There is no need to install the dirt amount detection unit 18 separately. In addition, it is not necessary to secure an installation space for the electric dust collector 14, the outdoor dirt amount detector 17, or the indoor dirt amount detector 18 in the outdoor air supply duct 15a or the indoor air exhaust duct 16b. Therefore, compared with the ventilation system 100 or the ventilation system 200, the ventilation system 300 has the effect of being easier to install and having a simpler configuration.

Embodiment 4.
FIG. 12 is a diagram showing the configuration of a ventilation system 400 according to Embodiment 4 of the present invention. Note that FIG. 12 shows the structure seen through one surface of the outdoor air supply duct 15a, the indoor air exhaust duct 16b, the air supply ventilator 310, and the first exhaust ventilator 320. showing. Further, in FIG. 12, the same reference numerals are assigned to the same components as those of the ventilation system in the above-described embodiment.

A ventilation system 400 according to the fourth embodiment includes an air supply ventilator 310 , a first exhaust ventilator 320 , an electric dust collector 14 , and an outdoor dirt amount detector 17 .

An air supply ventilation device 310 constituting an air supply unit for supplying outdoor air indoors, and an exhaust unit provided independently at a position away from the air supply ventilation device 310 for exhausting indoor air to the outdoors. The first exhaust ventilator 320 and the first exhaust ventilator 320 constitute a ventilator that ventilates the room, which is the space to be ventilated, by air supply and exhaust. A ventilator is installed in the space above the ceiling or in the space between the outer wall and the inner wall, and ventilates the room, which is the space to be ventilated, by supplying and exhausting air through the connected ducts. The ventilator is supplied with drive power from a power source (not shown).

The air supply ventilation device 310 supplies outdoor air into the room through a connected duct. The air supply ventilator 310 includes a housing 310a forming a main body. An outdoor suction port 10 is provided on one side surface of the housing 310a. An indoor air outlet 13 is provided on the other side surface of the housing 310a.

An outdoor air supply duct 15a communicating with the outdoors is connected to the outdoor air inlet 10 . An indoor-side air supply duct 15 b communicating with the interior of the room is connected to the indoor air outlet 13 .

An air supply blower 3 and an air supply side air filter 6 are provided inside the housing 310a. Inside the housing 310a, an air supply air passage is formed through which the air supply air flow flows by connecting the outdoor air inlet 10 and the indoor air outlet 13 via the air supply side air filter 6 and the air supply blower 3 . The supply airflow is a flow of outdoor air that is sucked from the outdoor air inlet 10 and then blown out from the indoor air outlet 13 to supply the indoor air.

A supply air blower 3 that is driven by an air supply blower motor to generate a supply air flow from the inlet end to the exit end of the supply air passage is incorporated on the downstream side of the supply air passage.

In the housing 310a, an air supply control unit 312, which is a control unit for controlling the operation of the air supply ventilator 310, and an air supply communication unit 311 are arranged on the side surface of the housing 310a. . The air supply control unit 312 and the air supply communication unit 311 may be provided inside the housing 310a. The air supply control unit 312 can communicate with the outdoor dirt amount detection unit 17, the air supply fan 3, and the air supply communication unit 311, and controls the operation of the air supply fan 3 and the air supply communication unit 311. Control. The air supply controller 312 controls the operation of the air supply fan 3 by outputting an operation instruction signal instructing the operation and a stop instruction signal instructing the stop to the air supply fan 3 . That is, the air supply controller 312 functions as a controller that controls the operation of the air supply fan 3 .

The communication between the outdoor dirt amount detection unit 17, the air supply blower 3, the air supply communication unit 311, and the air supply control unit 312 is wireless communication such as infrared communication, WiFi (registered trademark), or Bluetooth (registered trademark). or wired communication.

The air supply communication unit 311 can communicate with a first exhaust communication unit 321 of a first exhaust ventilation device 320 to be described later, and determines the operating state of the air supply fan 3 according to instructions from the air supply control unit 312. to the first exhaust communication unit 321 of the first exhaust ventilator 320 . The air supply communication unit 311 receives information on the reduced air supply air volume of the air supply fan 3 from the air supply control unit 312, and according to the instruction from the air supply control unit 312, adjusts the reduced air supply volume of the air supply fan 3. Information on the amount of supplied air is transmitted to the first exhaust communication unit 321 of the first exhaust ventilator 320 . Alternatively, the set air volume of the first exhaust ventilator 320 may be directly transmitted from the air supply controller 312 to the first exhaust communication unit 321 .

Communication between the air supply communication unit 311 of the air supply ventilator 310 and the first exhaust communication unit 321 of the first exhaust ventilator 320 is performed by infrared communication, WiFi (registered trademark), or Bluetooth (registered trademark). Such wireless communication may be used, or wired communication may be used.

Outside air OA flows from the outdoors through the outdoor air supply duct 15a and into the housing 310a from the outdoor suction port 10. As shown in FIG. The supply air flow that has flowed into the housing 310 a reaches the indoor outlet 13 via the supply air filter 6 and the supply air blower 3 . The supply airflow that has reached the indoor air outlet 13 is blown out into the room as supply air SA via the indoor-side air supply duct 15b.

An electric dust collector 14 is provided in the middle of the outdoor air supply duct 15a. An outdoor dirt amount detector 17 is installed on the upstream side of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits a detection signal to the air supply control unit 312 .

The first exhaust ventilation device 320 exhausts indoor air to the outside through a connected duct. The first exhaust ventilation device 320 includes a housing 320a that constitutes the main body. An outdoor outlet 11 is provided on one side surface of the housing 320a. The indoor suction port 12 is provided on the other side surface of the housing 320a.

The indoor air inlet 12 is connected to an indoor exhaust duct 16b that communicates with the interior of the room. The outdoor outlet 11 is connected to an outdoor exhaust duct 16a communicating with the outdoors.

An exhaust fan 4 and an exhaust-side air filter 7 are provided inside the housing 320a. Inside the housing 320a, an exhaust air passage is formed through which the indoor air inlet 12 and the outdoor air outlet 11 are communicated via the exhaust air filter 7 and the exhaust air blower 4, and the exhaust flow flows. The exhaust flow is a flow of indoor air sucked from the indoor air inlet 12 and discharged to the outside from the outdoor air outlet 11 .

At the downstream side of the exhaust airway, an exhaust fan 4 is installed which is driven by an exhaust fan motor to generate a flow of supply air from the inlet end to the outlet end of the exhaust airway.

In the housing 320a, a first exhaust communication unit 321 and a first exhaust control unit 322, which is a control unit that controls the operation of the first exhaust ventilator 320, are installed in the housing 320a. placed on the side. The first exhaust controller 322 is capable of communicating with the exhaust fan 4 and the first exhaust communication unit 321 and controls the operations of the exhaust fan 4 and the first exhaust communication unit 321 . The first exhaust control unit 322 controls the operation of the exhaust fan 4 by outputting an operation instruction signal instructing operation and a stop instruction signal instructing stop to the exhaust fan 4 . That is, the first exhaust controller 322 functions as a controller that controls the operation of the exhaust fan 4 .

The communication between the exhaust blower 4 and the first exhaust communication unit 321 and the first exhaust control unit 322 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark). It may also be wired communication.

The first exhaust communication unit 321 can communicate with the air supply communication unit 311 of the air supply ventilation device 310 , and the air supply communication unit 311 of the air supply ventilation device 310 supplies air to the air supply blower 3 . Receive airflow information. The first exhaust communication unit 321 receives information on the reduced air supply air volume of the air supply fan 3 transmitted from the air supply communication unit 311 of the air supply ventilation device 310 . The first exhaust communication section 321 transmits the received information to the first exhaust control section 322 . In this way, information on the reduced air supply air volume of the air supply fan 3 is transmitted from the air supply communication unit 311 of the air supply ventilation device 310 to the first exhaust control unit via the first exhaust communication unit 321. 322, the first exhaust control unit 322 calculates the difference between the received air supply air volume and the exhaust air volume based on the received air supply air volume, and reduces the exhaust air volume. Alternatively, the set air volume of the first exhaust ventilator 320 may be directly transmitted from the air supply communication unit 311 of the air supply ventilator 310 to the first exhaust communication unit 321 . The first exhaust communication section 321 transmits the received information to the first exhaust control section 322 . In this way, the set air volume of the first exhaust ventilator 320 is transmitted from the air supply communication unit 311 of the air supply ventilator 310 to the first exhaust control unit 322 via the first exhaust communication unit 321. When transmitted, the first exhaust control unit 322 controls the exhaust air volume according to the received set air volume of the first exhaust ventilation device 320 . Therefore, it is not necessary to calculate the air volume difference in the first exhaust controller 322 .

The return air RA flows from the room into the interior of the housing 320a from the room air inlet 12 via the room-side exhaust duct 16b. The exhaust flow that has flowed into the housing 320 a reaches the outdoor outlet 11 through the exhaust-side air filter 7 and the exhaust fan 4 . The exhaust flow that has reached the outdoor outlet 11 is blown out to the outside as the exhaust EA through the outdoor-side exhaust duct 16a.

A remote controller 25 capable of communicating with the air supply controller 312 is connected to the air supply controller 312 . The remote controller 25 receives commands for various controls of the air supply ventilator 310 . The remote controller 25 transmits various commands received from the user to the air supply controller 312 . The air supply controller 312 controls the air supply operation of the air supply ventilator 310 based on various commands transmitted from the remote controller 25 .

Communication between the air supply controller 312 and the remote controller 25 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication.

A remote controller 26 capable of communicating with the first exhaust control unit 322 is connected to the first exhaust control unit 322 . The remote controller 26 receives commands for various controls of the first exhaust ventilator 320 . The remote controller 26 transmits various commands received from the user to the first exhaust controller 322 . The first exhaust controller 322 controls the exhaust operation of the first exhaust ventilator 320 based on various commands transmitted from the remote controller 26 .

Communication between the first exhaust control unit 322 and the remote controller 26 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication.

Next, operation of the ventilation system 400 according to the fourth embodiment will be described. FIG. 13 is a flow chart showing the procedure for controlling the ventilation operation in the ventilation system 400 according to the fourth embodiment of the present invention.

When the ventilation operation of the ventilation system 400 is started, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 at a predetermined cycle in step S710. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the upstream area of the electric dust collector 14 in the supply air passage inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

When the air supply controller 312 receives the detection result of the dirt amount in the outdoor air, in step S720, based on the predetermined third threshold value and the detection result, the air supply control unit 312 determines that the dirt amount in the outdoor air is the third threshold value. is equal to or less than the threshold value. The third threshold is a reference value for the air supply controller 312 to determine whether to reduce the air supply air volume and the exhaust air volume, and corresponds to the above-described first threshold. The third threshold value is stored in advance in the air supply controller 312 and can be changed as appropriate by operating the remote controller 25 . Also, a switch for changing the third threshold may be provided separately.

If the amount of dirt in the outdoor air is equal to or less than the third threshold, that is, if Yes in step S720, the process returns to step S710. If the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17 is equal to or less than the third threshold, even if the outdoor air passes through the electric dust collector 14 for a short time, Objects can be properly collected by the electrostatic precipitator 14, and purified air can be supplied indoors. In this case, the air supply controller 312 performs control to maintain the air supply air volume and the exhaust air volume without changing them.

On the other hand, if the amount of dirt in the outdoor air is greater than the third threshold, that is, if No in step S720, the process proceeds to step S730. In step S730, the air supply controller 312 performs control to reduce the amount of air supply. When the amount of dirt in the outdoor air is greater than the third threshold, if the outdoor air passes through the electric dust collector 14 for a short time, the airborne matter in the outdoor air can be appropriately collected by the electric dust collector 14. can't Therefore, the air supply control unit 312 reduces the amount of air supply so that the outdoor air passes through the electric dust collector 14 longer than before the amount of air supply is changed. By making the time for the outdoor air to pass through the electric dust collector 14 longer than before the change in the air supply air volume, the dust collection efficiency of the airborne matter in the outdoor air passing through the electric dust collector 14 is increased before the change in the air supply air volume. It is possible to supply more purified air to the room by improving the air quality.

Further, when only the amount of air supplied by the air supply blower 3 is reduced, there arises a problem that the pressure in the room becomes negative, making it difficult to open the door. Therefore, in step S740, the air supply control unit 312 performs control to reduce the air supply air volume and at the same time reduce the exhaust air volume to the same air volume as the air supply air volume. That is, the air supply control unit 312 transmits information on the reduced air supply air volume, which is information on the reduced air volume of the air supply fan 3, to the first exhaust ventilation device 320 via the air supply communication unit 311. It is transmitted to the first exhaust communication unit 321 .

The first exhaust communication unit 321 receives information on the reduced air supply volume and transmits the information to the first exhaust control unit 322 . Upon receiving the information on the reduced supply air volume, the first exhaust control unit 322 performs control to reduce the exhaust air volume to the same air volume as the reduced supply air volume based on the information on the reduced supply air volume. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S750. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

The air supply control unit 312 receives a new detection result of the dirt amount in the outdoor air from the outdoor dirt amount detection unit 17 . In step S760, the air supply control unit 312 determines whether the amount of dirt in the outdoor air is equal to or less than the third threshold based on the newly received detection result of the amount of dirt in the outdoor air from the outdoor dirt amount detection unit 17. determine whether or not

If the amount of dirt in the outdoor air is greater than the third threshold, that is, if No in step S760, the process returns to step S750.

On the other hand, if the amount of dirt in the outdoor air is equal to or less than the third threshold, that is, if Yes in step S760, the process proceeds to step S770. In step S770, the air supply controller 312 performs control to return the air supply volume to the original state before it was reduced in step S730. The air supply controller 312 also performs control to return the exhaust air volume to the original state before it was reduced in step S740. That is, the air supply controller 312 transmits to the first exhaust controller 322 of the first exhaust ventilator 320 a return instruction signal for returning the exhaust air volume to the original state before it was reduced in step S740. . The first exhaust controller 322 performs control to return the exhaust air volume of the exhaust fan 4 to the original state in accordance with the return instruction signal. As a result, a ventilation operation is performed in which the air supply air volume and the exhaust air volume are the same air volume as in the original state. After step S770, the process returns to step S710.

Further, as shown in FIG. 12, an indoor dirt amount detection unit 18 is further provided, and based on the result of comparison between the amount of dirt in the outdoor air and the amount of dirt in the indoor air, the outdoor air supplied to the room is detected. If there is a risk of contamination, the amount of air supply and the amount of exhaust air may be reduced. In this case, the indoor dirt amount detection unit 18 transmits the detection result of the dirt amount in the indoor air to the first exhaust control unit 322 . The first exhaust controller 322 transmits the detection result of the indoor dirt amount detector 18 to the air supply controller 312 .

FIG. 14 is a flow chart showing the procedure for controlling the ventilation operation in the ventilation system 400 according to Embodiment 4 of the present invention.

When ventilation operation of ventilation system 400 is started, processing corresponding to step S10 is performed in step S810. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 at a predetermined cycle. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

Further, in step S820, processing corresponding to step S320 is performed. That is, the indoor dirt amount detection unit 18 detects the dirt amount in the indoor air flowing through the indoor-side exhaust duct 16b at a predetermined cycle. The indoor dirt amount detection unit 18 transmits the detection result to the first exhaust control unit 322 . The first exhaust controller 322 transmits the detection result of the indoor dirt amount detector 18 to the air supply controller 312 .

The air supply control unit 312 receives the detection result of the dirt amount in the outdoor air detected by the outdoor dirt amount detection unit 17 and the detection result of the dirt amount in the indoor air detected by the indoor dirt amount detection unit 18. do. In step S830, the air supply control unit 312 compares the detection result of the amount of dirt in the outdoor air and the detection result of the amount of dirt in the indoor air, and determines that the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air. It is determined whether or not.

If the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, that is, if Yes in step S830, the process returns to step S810.

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S830, the process proceeds to step S840. In step S840, the air supply controller 312 performs control to reduce the amount of supplied air. If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, the outdoor air supplied to the room may pollute the indoor air. Therefore, the air supply control unit 312 reduces the amount of air supply so that the outdoor air passes through the electric dust collector 14 longer than before the amount of air supply is changed. As a result, the ventilation system 400 improves the dust collection efficiency of airborne matter in the outdoor air passing through the electric dust collector 14 compared to before the change in the amount of supplied air, and supplies cleaner air indoors. can be done.

Further, when only the amount of supplied air is reduced, there arises a problem that the pressure inside the room becomes negative, making it difficult to open the door. Therefore, in step S850, the air supply control unit 312 performs control to reduce the air supply air volume and at the same time reduce the exhaust air volume to the same air volume as the air supply air volume. That is, the air supply control unit 312 transmits information on the reduced air supply air volume, which is information on the reduced air volume of the air supply fan 3, to the first exhaust ventilation device 320 via the air supply communication unit 311. It is transmitted to the first exhaust controller 322 .

Upon receiving the information on the reduced air supply air volume, the first exhaust control unit 322 performs control to reduce the exhaust air volume to the same air volume as the air supply air volume based on the information on the reduced air supply air volume. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S860. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

Further, in step S870, the indoor dirt amount detection unit 18 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b. The indoor dirt amount detection unit 18 transmits the detection result to the first exhaust control unit 322 . The first exhaust controller 322 transmits the detection result of the indoor dirt amount detector 18 to the air supply controller 312 .

The air supply control unit 312 detects the amount of dirt in the outdoor air newly detected by the outdoor dirt amount detection unit 17 and the amount of dirt in the indoor air newly detected by the indoor dirt amount detection unit 18. Receive detection results. In step S880, the air supply control unit 312 detects the amount of dirt in the outdoor air based on the newly received detection result of the amount of dirt in the outdoor air and the newly received detection result of the amount of dirt in the indoor air. It is determined whether or not it is equal to or less than the amount of dirt in the air.

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S880, the process returns to step S860.

If the amount of dirt in the outdoor air is less than or equal to the amount of dirt in the indoor air, that is, if Yes in step S880, the process proceeds to step S890. In step S890, the air supply controller 312 performs control to return the air supply volume to the original state before it was reduced in step S840. In addition, the air supply controller 312 performs control to return the exhaust air volume to the original state before it was reduced in step S850. That is, the air supply controller 312 transmits to the first exhaust controller 322 of the first exhaust ventilator 320 a restoration instruction signal for returning the exhaust air volume to the original state before it was reduced in step S850. . The first exhaust control unit 322 performs control to return the exhaust air volume to the original state according to the return instruction signal. As a result, a ventilation operation is performed in which the air supply air volume and the exhaust air volume are the same air volume as in the original state. After step S890, the process returns to step S810.

In the above description, the case where the amount of dirt in the outdoor air and the amount of dirt in the indoor air are compared by the air supply controller 312 is shown, but the amount of dirt in the outdoor air and the amount of dirt in the indoor air may be performed by the first exhaust control unit 322 .

Further, in the above, the air supply control unit 312 controls the outdoor dirt amount detection unit 17 and the air supply communication unit 311, and the first exhaust control unit 322 controls the indoor dirt amount detection unit 18 and the first Although the case of controlling the exhaust communication unit 321 has been described, for example, as in a HEMS (Home Energy Management System), the air supply is provided separately from the air supply ventilation device 310 and the first exhaust ventilation device 320. A control unit capable of controlling the air ventilation device 310 and the first exhaust ventilation device 320 collectively controls the air supply air volume of the air supply ventilation device 310 and the exhaust air volume of the first exhaust ventilation device 320. and may be managed.

Also in the ventilation system 400 according to the fourth embodiment, a condition setting table such as that shown in FIG. 4 or FIG. may be controlled.

As described above, the ventilation system 400 according to the fourth embodiment has a ventilation device in which the air supply section and the air exhaust section are provided independently. In such a ventilation system 400 as well, effects similar to those of the ventilation system 100 according to the first embodiment or the ventilation system 200 according to the second embodiment can be obtained.

Embodiment 5.
FIG. 15 is a diagram showing the configuration of a ventilation system 500 according to Embodiment 5 of the present invention. FIG. 15 is a diagram corresponding to FIG. In FIG. 15, the same reference numerals are given to the same components as those of the ventilation system in the above-described embodiment. Embodiment 5 describes a case where the ventilation system includes one supply air blower 3 and two exhaust air blowers 4 .

A ventilation system 500 according to the fifth embodiment includes an air supply ventilation device 310, a first exhaust ventilation device 320, a second exhaust ventilation device 330, an electric dust collector 14, and an outdoor dirt amount detection unit. 17. The ventilation system 500 has a configuration in which a second exhaust ventilation device 330 is added to the ventilation system 400 according to the fourth embodiment.

An air supply ventilation device 310 constituting an air supply unit for supplying outdoor air indoors, and an exhaust unit provided independently at a position away from the air supply ventilation device 310 for exhausting indoor air to the outdoors. and a first exhaust ventilator 320 that constitutes an exhaust unit that is independently provided at a position away from the supply air ventilator 310 and the first exhaust ventilator 320 and exhausts the indoor air to the outdoors. 2, the exhaust ventilator 330 constitutes a ventilator that ventilates the room, which is the space to be ventilated, by air supply and exhaust.

The second exhaust ventilator 330 has the same configuration as the first exhaust ventilator 320 and operates similarly to the first exhaust ventilator 320 . The second exhaust ventilator 330 includes a housing 330a forming a main body. An outdoor outlet 11 is provided on one side surface of the housing 330a. The indoor suction port 12 is provided on the other side surface of the housing 330a.

The indoor air inlet 12 is connected to an indoor exhaust duct 16b that communicates with the interior of the room. The outdoor outlet 11 is connected to an outdoor exhaust duct 16a communicating with the outdoors.

An exhaust fan 4 and an exhaust-side air filter 7 are provided inside the housing 330a. Inside the housing 330a, an exhaust air passage is formed through which the indoor air inlet 12 and the outdoor air outlet 11 are communicated via the exhaust air filter 7 and the exhaust air blower 4, and the exhaust flow flows.

An exhaust fan 4 driven by an exhaust fan motor to generate an exhaust flow from the inlet end to the outlet end of the exhaust air channel is incorporated downstream in the exhaust channel.

In the housing 330a, a second exhaust communication unit 331 and a second exhaust control unit 332, which is a control unit for controlling the operation of the second exhaust ventilator 330, are installed in the housing 330a. placed on the side. The second exhaust control section 332 is capable of communicating with the exhaust fan 4 and the second exhaust communication section 331 and controls the operations of the exhaust fan 4 and the second exhaust communication section 331 .

The communication between the exhaust blower 4 and the second exhaust communication unit 331 and the second exhaust control unit 332 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark). It may also be wired communication.

The second exhaust communication unit 331 can communicate with the air supply communication unit 311 of the air supply ventilator 310, and the air volume of the air supply blower 3 is transmitted from the air supply communication unit 311 of the air supply ventilator 310. to receive information about The second exhaust communication unit 331 receives information on the reduced air supply air volume transmitted from the air supply communication unit 311 of the air supply ventilation device 310 . The second exhaust communication unit 331 transmits the received information to the second exhaust control unit 332 . In this way, information on the reduced air supply air volume of the air supply blower 3 is transmitted from the air supply communication unit 311 of the air supply ventilation device 310 to the second exhaust control unit via the second exhaust communication unit 331. 332, the second exhaust air control unit 332 calculates the difference between the received air supply air volume and the exhaust air volume based on the received air supply air volume, and reduces the exhaust air volume. Alternatively, the set air volume of the second exhaust ventilator 330 may be directly transmitted from the air supply communication unit 311 of the air supply ventilator 310 to the second exhaust communication unit 331 . The second exhaust communication unit 331 transmits the received information to the second exhaust control unit 332 . In this way, the set air volume of the second exhaust ventilator 330 is transmitted from the air supply communication unit 311 of the air supply ventilator 310 to the second exhaust control unit 332 via the second exhaust communication unit 331. When transmitted, the second exhaust control unit 332 controls the exhaust air volume according to the received set air volume of the second exhaust ventilation device 330 . Therefore, calculation of the air volume difference in the second exhaust control section 332 is unnecessary.

A remote controller 27 capable of communicating with the second exhaust control unit 332 is connected to the second exhaust control unit 332 . The remote controller 27 receives commands for various controls of the second exhaust ventilator 330 . The remote controller 27 transmits various commands regarding the second exhaust ventilator 330 received from the user to the second exhaust ventilator 330 . The second exhaust controller 332 controls the exhaust operation of the second exhaust ventilator 330 based on various commands transmitted from the remote controller 27 .

Communication between the second exhaust control unit 332 and the remote controller 27 may be infrared communication, wireless communication such as WiFi (registered trademark) or Bluetooth (registered trademark), or wired communication.

Next, operation of the ventilation system 500 according to the fifth embodiment will be described. FIG. 16 is a flow chart showing the procedure for controlling the ventilation operation in the ventilation system 500 according to the fifth embodiment of the present invention. In the procedure for controlling the ventilation operation in the ventilation system 500 described below, when the amount of dirt in the outdoor air is greater than a predetermined threshold value, the air supply air volume and the exhaust air volume are automatically reduced, and the electric dust collector 14 It is the same as the ventilation system 400 according to the fourth embodiment described above in that processing for improving dust collection efficiency is performed.

By operating the remote controller 25 by the user, an operation instruction signal is sent to the air supply ventilator 310 . In addition, an operation instruction signal is sent to the first exhaust ventilator 320 by the user's operation of the remote controller 26 . In addition, when the user operates the remote controller 27 , an operation instruction signal is sent to the second exhaust ventilator 330 . For example, the air volume of the air supply fan 3 of the air supply ventilation device 310 is 150 m ³ /h, the air volume of the exhaust fan 4 of the first exhaust ventilation device 320 is 80 m ³ /h, and the second exhaust ventilation device 330 The ventilation operation of the ventilation system 500 is started by operating the exhaust air blower 4 at an air volume of 70 m ³ /h.

When the ventilation operation of ventilation system 500 is started, in step S910, the same processing as in step S810 is performed. In addition, the air supply controller 312 acquires the air volume of the exhaust fan 4 of the first exhaust ventilator 320 from the first exhaust controller 322 of the first exhaust ventilator 320 through communication. In addition, the air supply controller 312 acquires the air volume of the exhaust fan 4 of the second exhaust ventilator 330 from the second exhaust controller 332 of the second exhaust ventilator 330 through communication.

When the air supply controller 312 receives the detection result of the dirt amount in the outdoor air, in step S920, based on the predetermined third threshold value and the detection result, the air supply control unit 312 determines that the dirt amount in the outdoor air is the third threshold value. is equal to or less than the threshold value.

If the amount of dirt in the outdoor air is equal to or less than the third threshold, that is, if Yes in step S920, the process returns to step S910.

On the other hand, if the amount of dirt in the outdoor air is greater than the third threshold, that is, if No in step S920, the process proceeds to step S930. In step S930, the air supply controller 312 performs control to reduce the amount of air supply. Here, the air supply controller 312 reduces the air volume of the air supply fan 3 from, for example, 150 m ³ /h to 120 m ³ /h, and removes airborne matter in the outdoor air passing through the electrostatic precipitator 14 . To improve the dust collection efficiency compared to before changing the supply air volume.

Further, when only the amount of air supplied by the air supply blower 3 is reduced, there arises a problem that the pressure in the room becomes negative, making it difficult to open the door. Therefore, in step S940, the air supply control unit 312 performs control to reduce the air supply air volume and at the same time reduce the exhaust air volume to the same air volume as the air supply air volume.

The air supply controller 312 first calculates the air volume difference between the reduced air supply air volume and the current exhaust air volume. The air supply control unit 312 reduces the reduced air supply air volume of the air supply ventilation device 310, the exhaust air volume of the first exhaust ventilation device 320, and the exhaust air volume of the second exhaust ventilation device 330. Calculate the air volume difference between the current supply air volume and the current exhaust air volume. The air volume difference between the reduced supply air volume and the current exhaust air volume is calculated as follows.
(Reduced air volume of air supply fan 3: 120 m ³ /h) - (Air volume of exhaust fan 4 of first exhaust ventilation device 320: 80 m ³ /h) - (Second exhaust ventilation device 330 air volume Air volume of exhaust blower 4: 70 m ³ /h) = (-30 m ³ /h)

That is, when the air supply air volume of the air supply ventilation device 310 is reduced, the exhaust air volume of the exhaust part, which is the total of the exhaust air volume of the first exhaust ventilation device 320 and the exhaust air volume of the second exhaust ventilation device 330, is is 30 m ³ /h higher than the supply air volume. For this reason, the air supply controller 312 transmits a reduction instruction signal to the effect of reducing the exhaust air volume by 30 m ³ /h via the air supply communication unit 311 to the first exhaust ventilator 320 of the first exhaust ventilator 320 . It is transmitted to the control unit 322 .

Upon receiving the reduction instruction signal for reducing the exhaust air volume by 30 m ³ /h, the first exhaust control unit 322 of the first exhaust ventilation device 320 reduces the exhaust air volume by 30 m ³ /h based on the reduction instruction signal. Control is performed to reduce h. That is, the first exhaust control unit 322 performs control to reduce the exhaust air volume from 80 m ³ /h to 50 m ³ /h.

As a result, the air supply volume of the air supply ventilator 310, which is the air supply unit, the exhaust air volume of the first exhaust ventilator 320, and the exhaust air volume of the second exhaust ventilator 330 are combined. The exhaust air volume becomes 120 m ³ /h for both, and becomes equal. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S950. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

The air supply control unit 312 receives a new detection result of the dirt amount in the outdoor air from the outdoor dirt amount detection unit 17 . In step S960, the air supply control unit 312 determines whether the dirt amount in the outdoor air is equal to or less than the third threshold based on the detection result of the dirt amount in the outdoor air newly received from the outdoor dirt amount detection unit 17. determine whether or not

If the amount of dirt in the outdoor air is greater than the third threshold, that is, if No in step S960, the process returns to step S950.

On the other hand, if the amount of dirt in the outdoor air is equal to or less than the third threshold, that is, if Yes in step S960, the process proceeds to step S970. In step S970, the air supply controller 312 performs control to return the air supply volume to the original state before it was reduced in step S930. The air supply controller 312 also performs control to return the exhaust air volume to the original state before it was reduced in step S940.

That is, the air supply control unit 312 transmits to the first exhaust control unit 322 of the first exhaust ventilation device 320 a restoration instruction signal for returning the exhaust air volume to the original state before it was reduced in step S940. . The first exhaust controller 322 performs control to return the exhaust air volume of the exhaust fan 4 to the original state in accordance with the return instruction signal. As a result, the ventilation operation is performed at 150 m ³ /h, which is the same air volume in the original state for the supply air volume and the exhaust air volume. After step S970, the process returns to step S910.

In the above description, the case where the air supply control unit 312 transmits the reduction instruction signal to the first exhaust control unit 322 of the first exhaust ventilation device 320 has been described, but the air supply control unit 312 may send a reduction instruction signal to the second exhaust controller 332 of the second exhaust ventilator 330 . Upon receiving the reduction instruction signal, the second exhaust control unit 332 of the second exhaust ventilation device 330 performs control to reduce the exhaust air volume in accordance with the reduction instruction signal.

Further, the air supply controller 312 may perform control to reduce both the exhaust air volume of the first exhaust ventilation device 320 and the exhaust air volume of the second exhaust ventilation device 330 . In this case, the total of the reduced exhaust air volume of the first exhaust ventilation device 320 and the reduced exhaust air volume of the second exhaust ventilation device 330 is 120 m ³ /h.

Further, as shown in FIG. 15, the indoor side exhaust duct 16b connected to the indoor suction port 12 of the first exhaust ventilation device 320 is provided with the first indoor dirt amount detection unit 182, and the second exhaust ventilation A second indoor dirt amount detector 183 may be provided in the indoor exhaust duct 16b connected to the indoor air inlet 12 of the device 330 . That is, the indoor dirt amount detection units may be provided upstream of the exhaust-side air filter 7 of the first exhaust ventilator 320 and upstream of the exhaust-side air filter 7 of the second exhaust ventilator 330 . The first indoor dirt amount detection unit 182 and the second indoor dirt amount detection unit 183 correspond to the indoor dirt amount detection unit 18 described above.

In this case, the first indoor dirt amount detection unit 182 on the upstream side of the exhaust side air filter 7 of the first exhaust ventilation device 320 sends the first exhaust control unit 322 the detection result of the amount of dirt in the indoor air. to send. The first exhaust controller 322 transmits the detection result of the first indoor dirt amount detector 182 to the air supply controller 312 .

Further, the second indoor dirt amount detection unit 183 on the upstream side of the exhaust side air filter 7 of the second exhaust ventilation device 330 sends the detection result of the amount of dirt in the indoor air to the second exhaust control unit 332. Send. The second exhaust controller 332 transmits the detection result of the second indoor dirt amount detector 183 to the air supply controller 312 .

FIG. 17 is a flow chart showing another control procedure for ventilation operation in the ventilation system 500 according to the fifth embodiment of the present invention.

By operating the remote controller 25 by the user, an operation instruction signal is sent to the air supply ventilator 310 . In addition, an operation instruction signal is sent to the first exhaust ventilator 320 by the user's operation of the remote controller 26 . In addition, when the user operates the remote controller 27 , an operation instruction signal is sent to the second exhaust ventilator 330 . For example, the air volume of the air supply fan 3 of the air supply ventilation device 310 is 150 m ³ /h, the air volume of the exhaust fan 4 of the first exhaust ventilation device 320 is 80 m ³ /h, and the second exhaust ventilation device 330 The ventilation operation of the ventilation system 500 is started by operating the exhaust air blower 4 at an air volume of 70 m ³ /h.

When ventilation operation of ventilation system 500 is started, processing corresponding to step S10 is performed in step S1010. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 at a predetermined cycle. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

Also, in step S1020, the amount of dirt in the indoor air is detected at two locations. That is, the first indoor dirt amount detection unit 182 detects the amount of dirt in the indoor air flowing through the indoor exhaust duct 16b connected to the first exhaust ventilation device 320 at a predetermined cycle. The first indoor dirt amount detection unit 182 transmits the detection result to the first exhaust control unit 322 . The first exhaust control unit 322 transmits the detection result of the first indoor dirt amount detection unit 182 to the air supply control unit 312 via the first exhaust communication unit 321 .

The second indoor dirt amount detection unit 183 detects the amount of dirt in the indoor air flowing through the indoor exhaust duct 16b connected to the second exhaust ventilation device 330 at a predetermined cycle. The second indoor dirt amount detection unit 183 transmits the detection result to the second exhaust control unit 332 . The second exhaust control unit 332 transmits the detection result of the second indoor dirt amount detection unit 183 to the air supply control unit 312 via the second exhaust communication unit 331 .

The air supply control unit 312 detects the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17, the first indoor dirt amount detection unit 182, and the second indoor dirt amount detection unit 183. It receives the detection result of the amount of dirt in the indoor air. In step S1030, the air supply control unit 312 compares the detection result of the amount of dirt in the outdoor air and the detection result of the amount of dirt in the indoor air, and determines that the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air. It is determined whether or not.

If the amount of dirt in the outdoor air is less than or equal to the amount of dirt in the indoor air, that is, if Yes in step S1030, the process returns to step S1010. If the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, the amount of dirt in the outdoor air is equal to or less than the detection result of the first indoor dirt amount detection unit 182, and the amount of dirt in the outdoor air is This is the case where it is equal to or less than the detection result of the second indoor dirt amount detection unit 183 .

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S1030, the process proceeds to step S1040. If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, the amount of dirt in the outdoor air is greater than the detection result of the first indoor dirt amount detection unit 182, or the amount of dirt in the outdoor air is the second at least one of the cases where the amount of dirt in the room is greater than the detection result of the indoor dirt amount detection unit 183 .

In step S1040, the air supply controller 312 performs control to reduce the amount of air supply. Here, the air supply controller 312 reduces the air volume of the air supply fan 3 from, for example, 150 m ³ /h to 120 m ³ /h, and removes airborne matter in the outdoor air passing through the electrostatic precipitator 14 . To improve the dust collection efficiency compared to before changing the supply air volume.

Further, when only the amount of air supplied by the air supply blower 3 is reduced, there arises a problem that the pressure in the room becomes negative, making it difficult to open the door. Therefore, in step S1050, the air supply control unit 312 reduces the air supply amount, and at the same time, reduces the total exhaust air amount of the first exhaust ventilation device 320 and the second exhaust ventilation device 330. is reduced to the same air volume as the supplied air volume.

For example, in the detection result of the amount of dirt in the indoor air detected by the first indoor dirt amount detection unit 182 and the second indoor dirt amount detection unit 183, the indoor dirt amount detected by the first indoor dirt amount detection unit 182 Assume that the detection result of the amount of dirt in the air is relatively small, and the detection result of the amount of dirt in the room air detected by the second indoor dirt amount detection unit 183 is relatively large. In this case, since the air in the space or room that is being exhausted by the first exhaust ventilation device 320 is relatively clean, it can be determined that the amount of air exhausted may be small. Also, it can be determined that the air in the space or room to which the second exhaust ventilator 330 is exhausting is relatively dirty.

Therefore, in step S1050, the air supply controller 312 sets the total exhaust air volume of the first exhaust ventilation device 320 and the second exhaust ventilation device 330 to the same air volume as the supply air volume. In the case of reduction, control is performed to quickly replace the air in the space or room where the second exhaust ventilation device 330 is performing exhaust. That is, the air supply controller 312 performs control to reduce the exhaust air volume of the first exhaust ventilation device 320 and increase the exhaust air volume of the second exhaust ventilation device 330 . As a result, the air in the space or room that is being exhausted by the second exhaust ventilator 330 can be quickly replaced.

The air supply controller 312 first calculates the air volume difference between the reduced air supply air volume and the current exhaust air volume. The air supply control unit 312 reduces the reduced air supply air volume of the air supply ventilation device 310, the exhaust air volume of the first exhaust ventilation device 320, and the exhaust air volume of the second exhaust ventilation device 330. Calculate the air volume difference between the current supply air volume and the current exhaust air volume. The air volume difference between the reduced supply air volume and the current exhaust air volume is calculated as follows.
(Reduced air volume of air supply fan 3: 120 m ³ /h) - (Air volume of exhaust fan 4 of first exhaust ventilation device 320: 80 m ³ /h) - (Second exhaust ventilation device 330 air volume Air volume of exhaust blower 4: 70 m ³ /h) = (-30 m ³ /h)

That is, when the air supply air volume of the air supply ventilation device 310 is reduced, the exhaust air volume of the exhaust part, which is the total of the exhaust air volume of the first exhaust ventilation device 320 and the exhaust air volume of the second exhaust ventilation device 330, is is 30 m ³ /h higher than the supply air volume. In addition, the sum of the exhaust air volume of the first exhaust ventilation device 320 and the exhaust air volume of the second exhaust ventilation device 330 needs to be equal to the supply air volume.

The air supply control unit 312 transmits a reduction instruction signal indicating that the exhaust air volume of the first exhaust ventilation device 320 is to be reduced by 40 m ³ /h to the first exhaust ventilation device 320 via the air supply communication unit 311. It is transmitted to the first exhaust controller 322 . In addition, the air supply control unit 312 transmits an increase instruction signal indicating that the exhaust air volume of the second exhaust ventilation device 330 is to be increased by 10 m ³ /h via the air supply communication unit 311 to the second exhaust ventilation. It is sent to the second exhaust controller 332 of the device 330 .

Upon receiving the reduction instruction signal for reducing the exhaust air volume by 40 m ³ /h, the first exhaust control unit 322 of the first exhaust ventilation device 320 reduces the exhaust air volume by 40 m ³ /h based on the reduction instruction signal. Control is performed to reduce h. That is, the first exhaust control unit 322 performs control to reduce the exhaust air volume from 80 m ³ /h to 40 m ³ /h.

Upon receiving the increase instruction signal for increasing the exhaust air volume by 10 m ³ /h, the second exhaust control unit 332 of the second exhaust ventilation device 330 increases the exhaust air volume by 10 m ³ /h based on the increase instruction signal. Control to increase h. That is, the second exhaust control unit 332 performs control to increase the exhaust air volume from 70 m ³ /h to 80 m ³ /h.

As a result, the air supply volume of the air supply ventilator 310, which is the air supply unit, the exhaust air volume of the first exhaust ventilator 320, and the exhaust air volume of the second exhaust ventilator 330 are combined. The exhaust air volume becomes 120 m ³ /h for both, and becomes equal. As a result, even when the ventilation operation is performed by reducing the amount of supplied air, the pressure in the room can be kept constant, and the problem of difficulty in opening the door does not occur.

After reducing the amount of air supply and the amount of exhaust air, the outdoor dirt amount detector 17 detects the amount of dirt in the outdoor air flowing into the electric dust collector 14 in step S1060. That is, the outdoor dirt amount detection unit 17 detects the amount of dirt in the outdoor air flowing in the area upstream of the electric dust collector 14 inside the outdoor air supply duct 15a. The outdoor dirt amount detection unit 17 transmits the detection result to the air supply control unit 312 .

Also, in step S1070, the amount of dirt in the indoor air is detected at two locations. That is, the first indoor dirt amount detection unit 182 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16 b connected to the first exhaust ventilation device 320 . The first indoor dirt amount detection unit 182 transmits the detection result to the first exhaust control unit 322 . The first exhaust control unit 322 transmits the detection result of the first indoor dirt amount detection unit 182 to the air supply control unit 312 via the first exhaust communication unit 321 .

Also, the second indoor dirt amount detection unit 183 detects the amount of dirt in the indoor air flowing through the indoor-side exhaust duct 16b connected to the second exhaust ventilation device 330 . The second indoor dirt amount detection unit 183 transmits the detection result to the second exhaust control unit 332 . The second exhaust control unit 332 transmits the detection result of the second indoor dirt amount detection unit 183 to the air supply control unit 312 via the second exhaust communication unit 331 .

The air supply control unit 312 detects the amount of dirt in the outdoor air detected by the outdoor dirt amount detection unit 17, the first indoor dirt amount detection unit 182, and the second indoor dirt amount detection unit 183. It receives the detection result of the amount of dirt in the indoor air. In step S1080, the air supply control unit 312 receives the newly received detection result of the dirt amount in the outdoor air detected by the outdoor dirt amount detection unit 17, the newly received first indoor dirt amount detection unit 182 and the second indoor dirt amount detection unit 182. Based on the detection result of the amount of dirt in the indoor air detected by the indoor dirt amount detection unit 183 of No. 2, it is determined whether or not the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air.

If the amount of dirt in the outdoor air is greater than the amount of dirt in the indoor air, that is, if No in step S1080, the process returns to step S1060.

If the amount of dirt in the outdoor air is equal to or less than the amount of dirt in the indoor air, that is, if Yes in step S1080, the process proceeds to step S1090. In step S1090, the air supply controller 312 performs control to return the air supply volume to the original state before it was reduced in step S1040. In addition, the air supply controller 312 performs control to return the exhaust air volume to the original state before it was reduced in step S1050.

That is, the air supply controller 312 transmits to the first exhaust controller 322 of the first exhaust ventilator 320 a return instruction signal for returning the exhaust air volume to the original state before it was reduced in step S1050. . The first exhaust controller 322 performs control to return the exhaust air volume of the exhaust fan 4 to the original state in accordance with the return instruction signal. In addition, the air supply control unit 312 transmits to the second exhaust control unit 332 of the second exhaust ventilation device 330 a return instruction signal for returning the exhaust air volume to the original state before it was reduced in step S1050. . The second exhaust controller 332 performs control to return the exhaust air volume of the exhaust fan 4 to the original state in accordance with the return instruction signal. As a result, the ventilation operation is performed at 150 m ³ /h, which is the same air volume in the original state for the supply air volume and the exhaust air volume. After step S1090, the process returns to step S1010.

As described above, the ventilation system 500 according to Embodiment 5 has a ventilation device in which one air supply unit and two exhaust units are independently provided. In such a ventilation system 500 as well, effects similar to those of the ventilation system 100 according to the first embodiment or the ventilation system 200 according to the second embodiment can be obtained.

In addition, the ventilation system 500 reduces the total exhaust air volume of the first exhaust ventilation device 320 and the exhaust air volume of the second exhaust ventilation device 330. By increasing the exhaust air volume, the air in the space or room that is being exhausted by the second exhaust ventilation device 330 can be quickly replaced, and the air can be cleaned more efficiently.

Further, for example, like the HEMS, the air supply control unit 312, the first exhaust control unit 312, and the first exhaust control unit 312 are provided separately from the air supply control unit 312, the first exhaust control unit 322, and the second exhaust control unit 332. The air volume of the air supply control unit 312, the first exhaust control unit 322 and the second exhaust control unit 332 is controlled by a control unit capable of controlling the air supply control unit 322 and the second exhaust control unit 332. It may be controlled and managed collectively.

In addition, FIG. 15 describes the case where the ventilation system 500 includes one air supply ventilator and two exhaust ventilators. It is also possible to install

Also in the ventilation system 500 according to the fifth embodiment, a condition setting table such as that shown in FIG. 4 or FIG. may be controlled.

The configurations shown in the above embodiments show an example of the content of the present invention, and the techniques of the embodiments can be combined with each other, or can be combined with another known technique. However, part of the configuration may be omitted or changed without departing from the gist of the present invention.

1 heat exchange ventilator 1a, 310a, 320a, 330a housing 1b one side 1c the other side 2 heat exchanger 2a heat exchanger supply air passage 2b heat exchanger exhaust air passage 3 air supply 4 Exhaust blower 5 Control unit 6 Air supply side air filter 7 Exhaust side air filter 10 Outdoor suction port 11 Outdoor outlet 12 Indoor suction port 13 Indoor outlet 14 Electric dust collector 15a outdoor air supply duct 15b indoor air supply duct 16a outdoor exhaust duct 16b indoor exhaust duct 17 outdoor dirt amount detector 18 indoor dirt amount detector 19 human detector 21, 22, 23, 24 partition wall 25, 26, 27 remote controller 31a upstream air supply air passage 31b downstream air supply air passage 32a upstream exhaust air passage 32b downstream exhaust air passage 100, 200, 300, 400, 500 Ventilation System 101 Processor 102 Memory 310 Air Supply Ventilator 311 Air Supply Communication Unit 312 Air Supply Control Unit 320 First Exhaust Ventilator 321 First Exhaust Communication Unit , 322 first exhaust controller, 330 second exhaust ventilator, 331 second exhaust communication unit, 332 second exhaust controller.

Claims (7)

A ventilator for ventilating the room, having an air supply unit for supplying outdoor air to the room and an exhaust unit for discharging the indoor air to the outside;
a first dirt amount acquisition unit that acquires the amount of dirt in the outdoor air;
an electric dust collector that collects dirt in the outdoor air flowing into the air supply unit;
a human detection unit that detects the presence or absence of a person in the room;
a control unit that controls the air supply air volume of the air supply unit and the exhaust air volume of the exhaust unit;
with
Based on the acquisition result of the first dirt amount acquisition unit, the control unit determines, when the amount of dirt in the outdoor air flowing into the electric dust collector is greater than a reference value, the air supply air volume of the air supply unit and the exhaust air volume of the exhaust unit, and controlling the reduction degree of the supply air volume of the air supply unit and the exhaust air volume of the exhaust unit based on the detection result of the person in the room by the human detection unit ,
A ventilation system characterized by: The control unit reduces the air supply air volume of the air supply unit and the exhaust air volume of the exhaust unit to the same air volume;
The ventilation system of claim 1, characterized by: The reference value is a predetermined threshold,
3. Ventilation system according to claim 1 or 2, characterized in that: A second dirt amount acquisition unit that acquires the amount of dirt in the indoor air,
The reference value is the acquisition result of the second dirt amount acquisition unit;
3. Ventilation system according to claim 1 or 2, characterized in that: The ventilation device is a heat exchange ventilation device connected to the outdoors and indoors by a duct,
The electric dust collector is installed in the duct connecting the outdoors and the heat exchange ventilation device,
5. Ventilation system according to any one of claims 1 to 4, characterized in that: The ventilation device is a heat exchange ventilation device,
The electrostatic precipitator is installed on the supply air passage in the heat exchange ventilation device,
5. Ventilation system according to any one of claims 1 to 4, characterized in that: The ventilation device is provided with the air supply unit and the exhaust unit independently,
The electrostatic precipitator is installed on an air supply air passage of the air supply unit;
5. Ventilation system according to any one of claims 1 to 4, characterized in that:

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