JP7178703B2 - ventilation system - Google Patents

Description

The present invention relates to ventilation systems.

Conventionally, there have been proposed techniques for making it easier to open an entrance door that is difficult to open while a ventilation device is in operation. For example, Patent Literature 1 discloses a ventilation system capable of making it easier to open an entrance door even when local ventilation is being carried out in a building. This ventilation system
A heat exchange ventilator installed indoors for exhausting indoor air to the outdoors, an electric lock for locking and unlocking the entrance door, and detecting that the heat exchange ventilator is in operation and the pressure of the indoor air is increased. Control the operation of the heat exchange ventilation system to eliminate or reduce the negative pressure of the indoor air when it detects that the state of the electric lock has changed from locked to unlocked in a state of negative pressure. and a cooperative control device for performing.

Japanese Patent Application Laid-Open No. 2018-031510

In the above conventional technology, control is performed to reduce the negative pressure of the indoor air by reducing the air volume of the range hood or stopping the operation when the electric lock of the entrance door changes from locked to unlocked. However, since the range hood is operated with a large exhaust air volume, it takes time for the negative pressure of the indoor air to actually decrease even if the exhaust air volume is reduced. In fact, the negative pressure is not completely reduced during the time until the door is opened, and the difficulty of opening the entrance door does not change. Also, if the number of rotations of the range hood fan is suddenly reduced in order to suddenly reduce the amount of exhaust air in a short period of time, the load on the motor will shorten the life of the motor, and the distance between the motor shaft pin and the boss of the fan will increase. Because a strong force is applied to the surface, it generates a loud noise and wears out quickly.

Therefore, the present invention has been devised in view of such circumstances, and maintains the original function of the range hood to accurately collect oily smoke and the like generated from cooking, while maintaining the original function of the range hood. To provide a ventilation system that improves difficulty in opening a door.

In order to solve the above problems, a range hood installed in a building, a human detection unit for detecting the approach and/or separation of a person from an entrance door installed in the building, and an opening preparation operation for the entrance door installed in the building. and a control unit that controls the range hood based on the detection information of the human detection unit and the detection information of the opening preparation operation detection unit, and the control unit controls the range hood while the range hood is in operation. Provided is a ventilation system that reduces the amount of exhaust air when an opening preparation operation detection section detects an opening preparation operation, and further reduces the amount of exhaust air when a human detection section detects an approaching person .
According to this, by reducing the exhaust air volume of the range hood when it detects a person approaching and securing the time until the entrance door is actually opened, it becomes difficult to open the entrance door due to the negative pressure inside. Ventilation systems can be provided that improve airflow.

Furthermore, the control unit may be characterized by returning the exhaust air volume of the range hood to the original exhaust air volume when the human detection unit detects separation of the person.
According to this, it is possible to maintain the original function of the range hood to accurately collect oily smoke and the like generated from cooking by restoring the original exhaust air volume when separation of a person is detected.

Furthermore, a door detection unit that detects the open state of the front door is further provided, and the control unit detects that the front door is opened by the door detection unit after the human detection unit detects the approach of a person while the range hood is in operation. It may be characterized in that when it is detected, the exhaust air volume of the range hood is returned to the original exhaust air volume.
According to this, when it is detected that the entrance door has been opened after detecting the approach of a person, the exhaust air volume of the range hood is reduced by returning it to the original exhaust air volume. can be minimized and the original function of the range hood can be maintained.

Furthermore, an air supply port is installed in the building so as to communicate with the outdoors, and the control unit can open and close the air supply port. may be characterized by controlling the opening of .
According to this, by reducing the exhaust air volume of the range hood and controlling the opening of the air supply port when a person is detected approaching, the amount of decrease in the exhaust air volume is reduced, maintaining the original function of the range hood. It is possible to further improve the difficulty of opening the front door due to the negative pressure of the air.

Further, the range hood may be of a simultaneous supply and discharge type, and the control unit may increase the amount of supplied air when the human detection unit detects an approach of a person during operation of the range hood.
According to this, when a person is detected approaching, the exhaust air volume of the range hood is reduced and the supply air volume is actively increased, so that the amount of decrease in the exhaust air volume is smaller and the original function of the range hood is maintained. However, it is possible to further improve the difficulty of opening the entrance door due to the negative pressure indoors.

Further, the control unit may be characterized by increasing the amount of air supplied to the range hood when detecting the opening preparation operation of the entrance door.
According to this, if the range hood is of the simultaneous supply and discharge type, when the opening preparation operation of the front door is detected, the air supply air volume is increased while maintaining the exhaust air volume of the range hood, so that the indoor pressure becomes negative. It is possible to provide a ventilation system that improves the difficulty of opening the front door.

Furthermore, it may be characterized by further comprising an informing unit for informing when the human detection unit detects the approach of a person or when the front door is prepared to be opened.
According to this, it is possible to notify that the difficulty in opening the front door due to the negative pressure indoors has been improved.

As described above, according to the present invention, while maintaining the original function of the range hood to accurately collect oily smoke and the like generated from cooking, the difficulty of opening the front door due to negative pressure inside the house is eliminated. An improved ventilation system can be provided.

The figure which shows the case where the ventilation system of the 1st Example which concerns on this invention, and the 2nd Example is installed in the building. 1 is a block diagram of a ventilation system of a first embodiment according to the present invention; FIG. The flowchart which shows the control flow in the ventilation system of 1st Example which concerns on this invention. The block diagram of the ventilation system of the 2nd Example which concerns on this invention. The flowchart which shows the control flow in the ventilation system of 2nd Example which concerns on this invention.

Hereinafter, each embodiment according to the present invention will be described with reference to the drawings.
<First embodiment>
A ventilation system 100 in this embodiment will be described with reference to FIGS. The ventilation system 100 functions to link the range hood 10 installed in the building HS (house in this embodiment) with the entrance door DR of the building HS. The cooker hood 10 is provided above the stove BN installed in the kitchen, and sucks the air containing oily smoke and the like generated when cooking on the stove BN with a large exhaust air volume and discharges it to the outside, thereby removing the oily smoke and the like. Prevent it from spreading indoors. When the range hood 10 is operated with a large exhaust air volume, the air inside the building HS becomes negative pressure, and in the recent building HS with good airtightness, the negative pressure causes a phenomenon that the entrance door DR becomes difficult to open. However, when the range hood 10 reduces the amount of exhaust air, oily smoke cannot be collected and is diffused indoors. As described below, the ventilation system 100 maintains the original function of the range hood 10, which is to accurately collect oily smoke and the like generated from cooking. improve sturdiness. In this embodiment, a house will be described as an example, but it goes without saying that the present invention can be applied not only to houses but also to stores such as yakiniku restaurants that exhaust a large amount of air.

As also shown in FIG. 2, the ventilation system 100 includes a range hood 10 installed in the building HS, a human detection unit 30 for detecting approach and/or separation of a person from the entrance door DR provided in the building HS, The human detection unit 30 is replaced with or used in combination with an opening preparation operation detection unit 50 that detects an opening preparation operation of the entrance door DR, a door detection unit 40 that detects the open state of the entrance door DR, and the human detection unit 30. or when the opening preparation operation detection unit 50 detects the opening preparation operation of the front door DR, and an openable and closable air supply port 70 installed in the building HS so as to communicate with the outside. and a controller 20 (control unit 20) that controls the cooker hood 10 based on detection information of one or a combination of the human detection unit 30, the door detection unit 40, and the opening preparation operation detection unit 50.

The range hood 10 is designed so that the user can generally set the magnitude of the air volume such that the volume of the exhaust air is strong, medium or weak, and the set air volume draws in indoor air and exhausts it to the outside. is. In this embodiment, the cooker hood 10 is provided above the stove BN, but is not particularly limited, and may be provided on the side of the stove BN. The range hood 10 includes an exhaust fan 11 that rotates for exhausting air, an operation unit 15 for the user to instruct operation and the amount of exhaust air, and a communication unit 14 for communicating with the controller 20. , and a range hood control unit 13 that controls these as a whole. A sirocco fan with high static pressure is generally used for the exhaust fan 11 .

The human detection unit 30 is provided on the outer wall or inner wall of the building HS near the entrance door DR, the roof above the entrance, the entrance door, etc., and detects the approach or separation of a person from the outside or inside of the entrance door DR. detect. The human detection unit 30 is generally a so-called human sensor. The human sensor detects the location of a person using various methods such as infrared rays, ultrasonic waves, and visible light, and the human detection unit 30 may use any method. In addition, since the human detection unit 30 only needs to detect that a person has approached/separated from the front door DR, not only such a general human sensor but also a surveillance camera having a human recognition function, an entrance door, and so on. A weight sensor in the vicinity of the DR, or a proximity sensor for detecting the approach/separation of an electronic key for locking/unlocking the front door DR may be used as long as it detects the outside of the front door DR.

The human detection unit 30 may detect the approach of a person when the state of not detecting a person changes to the state of detecting a person, or may detect the approach of a person when the distance between the person and the front door DR becomes small. can be detected. Conversely, the human detection unit 30 may detect that the person is separated when the state in which the person is detected changes to the state in which the person is not detected, or the distance between the person and the entrance door DR increases. The state may be detected as a person's separation.

The opening preparation operation detection unit 50 not only detects what the human detection unit 30 detects, but also detects that a key has actually been inserted into the lock of the front door DR, and performs an unlocking operation (rotating operation) from the inserted key. ) or actually unlocked. Furthermore, the opening preparatory operation detection unit 50 not only detects the approach of a person, but also captures a preparatory operation including an actual opening operation of the entrance door, such as a release operation or putting a hand on the doorknob. For example, the opening preparation operation detection unit 50 includes a sensor that detects the approach of a person, a sensor that detects the opening and closing of the gate of the building HS on the road side of the entrance door DR, a sensor that detects the return of the car to the garage, It also includes a sensor that detects when a resident in a condominium unit has unlocked the entrance auto-lock for each unit, and a sensor that acquires location information from a smartphone owned by a registered resident.

The door detection unit 40 is a sensor that detects the open state of the entrance door DR, and is generally a door open/close sensor. The open state of the entrance door DR means a state in which the handle (knob) is operated and the latch is disengaged from the latch receiver, or the frame portion of the entrance door DR is in contact with the door (such as a small piece of wood attached to the frame of the hinged door to stop the door). state away from The entrance door DR is usually a hinged door that opens from the inside to the outside of the building HS, but it may be a sliding door.

The controller 20 receives input signals from sensors of the human detection unit 30, the door detection unit 40, and the opening preparation operation detection unit 50, outputs signals to the notification unit 60 and the air supply port 70, and inputs/outputs with the range hood 10. A control communication unit (not shown) having a communication function for exchanging signals and the like is provided, and a central control unit (not shown) for controlling these as a whole is provided. The controller 20 includes a microprocessor that performs various arithmetic processing as a central control unit, a control program such as an OS (Operating System), a program that defines various processing procedures, a memory for storing required data, and a control communication unit. are connected to each other via an internal bus or the like. Functions constituting the controller 20 are realized in cooperation with these hardware. A communication function in the control communication unit is not particularly limited, and is appropriately executed by a known communication technique.

The controller 20 controls the range hood 10 based on detection information of one of the human detection unit 30, the door detection unit 40, and the opening preparation operation detection unit 50, or a combination thereof. For example, the controller 20 gradually decreases the exhaust air volume of the range hood 10 when the human detection unit 30 detects the approach of a person while the range hood 10 is operating. Note that reducing the exhaust air volume includes setting the exhaust air volume to zero, that is, stopping the operation of the cooker hood 10 . Detecting the approach of a person to the front door DR by the human detection unit 30 indicates that the person is likely to reach the front door DR and attempt to open it after a while. While the range hood 10 is in operation, the interior becomes negative pressure, and when opening the front door DR to the outside, it becomes difficult to open, but the controller 20 reduces the exhaust air volume of the range hood 10 to alleviate the degree of negative pressure. It becomes easier to open the entrance door DR by releasing the negative pressure state.

However, the indoor negative pressure does not disappear at the moment when the exhaust air volume of the range hood 10 is reduced, and it takes some time for the negative pressure to disappear in the vicinity of the entrance door DR. Therefore, it takes about several seconds from when the human detection unit 30 detects a person to when the entrance door DR is actually opened. It becomes easier to open the entrance door DR. In this way, when the human detection unit 30 detects the approach of a person, the amount of exhaust air from the cooker hood 10 is reduced, and the time until the front door DR is actually opened is secured, so that the indoor becomes negative pressure. It is possible to provide the ventilation system 100 that improves the difficulty of opening the entrance door DR due to

The human detection unit 30 can detect both the outside and the inside of the entrance door DR. It is easy to apply force because it is necessary to push open the entrance door DR from the inside. Therefore, even if the indoor pressure is negative, the problem is small, so the human detection unit 30 of the ventilation system 100 may detect a person only outside the entrance door DR.

Also, the time from when the opening preparation operation detection unit 50 detects the opening preparation operation of the front door DR to when the front door DR is actually opened is If the time required for the DR to open is longer than the time taken (for example, when it is detected that the car has returned to the garage), when the opening preparation operation detection unit 50 detects the opening preparation operation while the range hood 10 is being operated, The speed at which the exhaust air volume is reduced may be slowed down. Conversely, the time from when the opening preparation operation detection unit 50 detects the opening preparation operation of the front door DR to when the front door DR is actually opened is when the human detection unit 30 detects a person and when the front door is actually opened. If it is shorter than the time until the door DR is opened (such as when an unlocking operation is detected), the exhaust air volume is reduced when the opening preparation operation detection unit 50 detects the opening preparation operation while the range hood 10 is in operation. You can increase the speed at which the In addition, by combining the human detection unit 30 and the opening preparation operation detection unit 50 together, the exhaust air volume is slightly reduced when the opening preparation operation detection unit 50 detects, and is further reduced when the human detection unit 30 detects. to cancel the negative pressure state. In this way, by reducing the exhaust air volume of the range hood 10 in two stages, the time from detection by the human detection unit 30 to cancellation of the negative pressure near the front door DR can be shortened.

Also, when the human detection unit 30 detects the separation of the person, the controller 20 preferably restores the exhaust air volume of the cooker hood 10 to the original exhaust air volume before detecting the approach of the person. The distance is detected, for example, after detecting an approach on the outdoor side of the front door DR, the distance is detected on the indoor side, or the distance is detected on the outdoor side. In the former case, the entrance door DR is opened from the outside and the user entered the building. is the case. In this way, by returning to the original exhaust air volume when the separation of a person is detected, the original function of the range hood 10 is to accurately collect oily smoke, etc. generated from cooking and prevent the oily smoke, etc. from diffusing indoors. Functionality can be maintained. It should be noted that returning to the original exhaust air volume means that, for example, when the air volume before detecting the approach of a person is "strong", which is the largest exhaust air volume, the approach of a person is detected and the operation of the range hood 10 is restarted. It means to stop and then return to "strong" exhaust air volume because separation is detected.

Further, when the door detection unit 40 detects that the front door DR is opened after the human detection unit 30 detects the approach of a person while the range hood 10 is operating, the controller 20 detects that the range hood 10 is opened. It is preferable to restore the exhaust air volume to the original exhaust air volume. If the negative pressure is reduced at the moment when the front door DR is opened from the closed state, the phenomenon that makes it difficult to open does not occur, and even if the original exhaust air volume is restored when the front door DR starts to open slightly, the front door DR can be opened. The phenomenon that makes it difficult to open does not occur. Further, even if it is detected that the entrance door DR is opened and the exhaust air volume of the range hood 10 is returned to the original exhaust air volume, it takes some time until the negative pressure increases near the entrance door DR. Therefore, the phenomenon that the front door DR becomes difficult to open does not occur.

In this way, when it is detected that the entrance door DR is opened after detecting the approach of a person, the exhaust air volume of the range hood 10 is returned to the original exhaust air volume, thereby reducing the exhaust air volume of the range hood 10. The original function of the range hood 10 can be maintained by minimizing the time spent in the range hood. Assuming that it takes about several seconds from when the human detection unit 30 detects a person to when the front door DR is actually opened, the amount of exhaust air from the range hood 10 is reduced only for about a few seconds, so oily smoke or the like is generated indoors. You can prevent it from spreading.

The air supply port 70 is preferably installed in the building HS so as to communicate with the outdoors, and is configured to be openable and closable by the controller 20 . In this way, by reducing the exhaust air volume of the range hood 10 and controlling the opening of the air supply port 70 when detecting the approach of a person, the amount of decrease in the exhaust air volume is reduced, and the original function of the range hood 10 is maintained. However, it is possible to further improve the difficulty of opening the entrance door DR due to the negative pressure indoors. The position at which the air supply port 70 is provided is not particularly limited, but is preferably near the front door DR because it is for eliminating the negative pressure at the front door DR.

The notification unit 60 notifies when the human detection unit 30 detects the approach of a person or when the opening preparation operation detection unit 50 detects the opening preparation operation of the entrance door DR. The notification is given by one or both of visual stimulation (such as flickering of a lamp, etc.) and auditory stimulation (such as ringing of a buzzer, etc.) to people indoors. According to this, it is possible to notify that the difficulty in opening the front door DR due to the negative pressure indoors has been improved.

A processing flow of the controller 20 in the ventilation system 100 will be described with reference to FIG. Note that ST in the flow chart means a step. In ST001, the controller 20 communicates with the range hood control section 13 via the communication section 14 to check whether the range hood 10 is in operation. Whether or not the range hood 10 is in operation is whether or not the range hood 10 is in exhaust operation to exhaust indoor air at a predetermined exhaust air volume instructed by the operation unit 15, regardless of whether or not cooking is being performed on the stove BN. Judging by whether.

When the range hood 10 is in operation, the controller 20 checks in ST002 whether or not a signal indicating that a person is approaching is received from the human detection unit 30 . When the controller 20 receives a signal indicating that a person is approaching (person approach signal), in ST003, the controller 20 acquires the exhaust air volume at the time when the person approach signal was received from the range hood control unit 13 via the communication unit 14. and stores it, and transmits it to the range hood control unit 13 via the communication unit 14 so as to reduce the exhaust air volume. For example, if the exhaust air volume is "strong" when the human approach signal is received, the controller 20 may set the exhaust air volume to be "weak" with a small exhaust air volume. In the case of "medium", the exhaust fan 11 may be stopped.

Also, when the human approach signal is received, the controller 20 controls to open the air supply port 70 in ST005. In the flow chart of the present figure, after exhaust air volume reduction control is performed in ST003, opening control of the air supply port 70 is performed in ST005, but the controller 20 may perform control of ST003 and ST005 at the same time. . When the exhaust air volume reduction control and the opening control of the air supply port 70 are performed, the controller 20 checks in ST006 whether or not a signal indicating that a person is separating from the human detection unit 30 (person separation signal) is received. do.

If the person-separation signal is not received, the controller 20 checks in ST007 whether or not a signal indicating that the entrance door DR has been opened (door open signal) is received from the door detection unit 40 . When the controller 20 receives the human approach signal, does not receive the human separation signal, and does not receive the door open signal, the controller 20 determines that the person approaching the entrance door DR is staying near the entrance door DR, and separates the person. Wait until you receive a signal or door open signal.

When the person separation signal is received in ST006, the controller 20 determines in ST008 that the person staying near the front door DR has separated without opening the front door DR, and restores the exhaust air volume to the one stored in ST003. The cooker hood control unit 13 is instructed via the communication unit 14 to turn on. Further, the controller 20 controls to close the air supply port 70 in ST009.

When the door open signal is received in ST007, the controller 20 determines in ST008 that the person staying near the entrance door DR opens the entrance door DR to enter from the outside to the inside (or exit from the inside to the outside), The range hood control unit 13 is instructed via the communication unit 14 to return to the exhaust air volume stored in ST003. Further, the controller 20 controls to close the air supply port 70 in ST009.

By controlling in this way, the exhaust air volume of the range hood 10 is reduced when the approach of a person is detected, and the time until the entrance door DR is actually opened is secured, so that the indoor becomes negative pressure. The difficulty of opening the entrance door DR is improved, and the original exhaust air volume is restored when the separation of a person or the open state of the entrance door DR is detected, thereby minimizing the time during which the exhaust air volume of the range hood 10 is reduced. It is possible to provide the ventilation system 100 capable of maintaining the original function of the range hood 10.

<Second embodiment>
A ventilation system 100A in this embodiment will be described with reference to FIGS. 1, 4 and 5. FIG. In order to avoid redundant description, the same elements are denoted by the same reference numerals and their description is omitted, and the description will focus on the differences from the above embodiment. 100 A of ventilation systems function so that the range hood 10A installed in the building HS may be interlocked with the entrance door DR of the building HS. The cooker hood 10A sucks air containing greasy smoke and the like generated when cooking on the stove BN with a large exhaust air volume and discharges it to the outdoors, and at the same time supplies air from the outdoors, thereby preventing the greasy smoke and the like from diffusing indoors. It is a simultaneous supply and discharge type range hood that prevents indoor negative pressure.

As also shown in FIG. 4, the ventilation system 100A includes a range hood 10A installed in the building HS, a human detection unit 30 that detects approach and/or separation of a person from the entrance door DR provided in the building HS, The human detection unit 30 is replaced with or used in combination with an opening preparation operation detection unit 50 that detects an opening preparation operation of the entrance door DR, a door detection unit 40 that detects the open state of the entrance door DR, and the human detection unit 30. or when the opening preparation operation detection unit 50 detects the opening preparation operation of the front door DR, and an openable and closable air supply port 70 installed in the building HS so as to communicate with the outside. and a controller 20A (control unit 20A) that controls the cooker hood 10 based on detection information of one of the human detection unit 30, the door detection unit 40, and the opening preparation operation detection unit 50, or a combination thereof.

The range hood 10A generally allows the user to set the magnitude of the air volume, such as high, medium, or low exhaust air volume. is. In addition, the range hood 10A is a simultaneous air supply and exhaust type that includes not only an exhaust duct leading to the outdoors but also an air supply duct, and sucks indoor air and exhausts it to the outdoors, and the amount of exhaust air is about the same as, or less than or less than that. Outdoor air is supplied indoors with a higher supply air volume. The range hood 10A includes an exhaust fan 11 that rotates to exhaust air, an air supply fan 12 that rotates to supply air, and an operation unit 15 for the user to operate and instruct the amount of exhaust air. , a communication unit 14 for communicating with the controller 20A, and a range hood control unit 13 for controlling these as a whole. The range hood control unit 13 controls the rotational speeds of the air supply fan 12 and the exhaust fan 11 based on the balance between air supply and exhaust.

The controller 20A controls the cooker hood 10A based on detection information of one of the human detection unit 30, the door detection unit 40, and the opening preparation operation detection unit 50, or a combination thereof. For example, the controller 20A gradually decreases the amount of exhaust air from the range hood 10A and gradually increases the amount of supply air when the human detection unit 30 detects the approach of a person during operation of the range hood 10A. Note that increasing the supply air volume includes controlling the operation of the range hood 10A so as to increase the supply air volume from zero, or to increase the supply air volume from a predetermined air volume to a supply air volume exceeding the exhaust air volume. shall be taken.

Detecting the approach of a person to the front door DR by the human detection unit 30 indicates that the person is likely to reach the front door DR and attempt to open it after a while. When the range hood 10 is in operation, the interior becomes negative pressure, and when the entrance door DR is opened to the outside, it becomes difficult to open. By not only reducing the amount of exhaust air, but also increasing the amount of supplied air, the degree of negative pressure is alleviated or the negative pressure state is eliminated, making it easier to open the entrance door DR.

A processing flow of the controller 20A in the ventilation system 100A will be described with reference to FIG. The controller 20A differs only in ST004 and ST008A from the processing flow in the above embodiment, so this point will be mainly described. When the controller 20A receives a signal indicating that a person is approaching (a person approaching signal) in ST002, the controller 20A sets the exhaust air volume when receiving the person approaching signal from the range hood control unit 13 via the communication unit 14 in ST003. is acquired and stored, and transmitted to the range hood control unit 13 via the communication unit 14 so as to reduce the exhaust air volume.

Further, when the human approach signal is received, the controller 20A acquires and stores the air supply air volume at the time when the human approach signal was received from the range hood control unit 13 via the communication unit 14 in ST004. It is transmitted to the range hood control unit 13 via the communication unit 14 so as to increase the air volume.

When the person separation signal is received in ST006 or when the door open signal is received in ST007, the controller 20A determines in ST008A that the person staying near the entrance door DR has separated without opening the entrance door DR. Judging that the DR is opened to enter from the outdoors to the indoors, the range hood controller 13 is instructed via the communication unit 14 to restore the exhaust air volume stored in ST003 and the supply air volume stored in ST004. do.

By controlling in this way, when the approach of a person is detected (including the detection of the opening preparation operation), the air supply air volume of the range hood 10A is increased and the exhaust air volume is decreased, until the entrance door DR is actually opened. By securing time, it is possible to improve the difficulty of opening the front door DR due to negative pressure indoors, and to restore the original exhaust air volume when detecting the separation of people or the open state of the front door DR. It is possible to provide the ventilation system 100A capable of minimizing the time during which the exhaust air volume of the range hood 10 is reduced and maintaining the original function of the range hood 10A. In addition, since the air volume is controlled after a predetermined grace period rather than abruptly, it is possible to reduce the load on the motor and prevent the motor shaft from coming into contact with the fan boss, thereby eliminating the difficulty in opening the door. can.

In addition, by using the simultaneous supply and discharge type range hood 10A, the exhaust air volume of the range hood 10A is reduced when a person's approach is detected, and the supply air volume is actively increased, so that the decrease in the exhaust air volume is reduced. can be made smaller. As a result, while maintaining the original function of the range hood 10A to accurately collect oily smoke and the like generated from cooking and prevent the oily smoke and the like from diffusing indoors, the opening of the entrance door DR due to the negative pressure indoors is maintained. Difficulty can be improved. In addition, if the range hood is a simultaneous air supply and exhaust type, the load on the motor can be reduced by increasing the amount of air supplied, and the difficulty of opening the door can be eliminated by suppressing the contact between the motor shaft and the fan boss. can do. Therefore, the life of the motor is not shortened, and abnormal noise is not generated due to poor contact between the motor shaft and the fan boss.

It should be noted that the present invention is not limited to the exemplified embodiments, and can be implemented with a configuration that does not deviate from the content described in each item of the claims. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, there may be modifications, quantities, Various modifications can be made to other detailed configurations by those skilled in the art.

100 ventilation system 10 cooker hood 11 exhaust fan 12 air supply fan 13 RH control unit 14 communication unit 15 operation unit 20 control unit 30 human detection unit 40 door detection unit 50 opening preparation operation detection unit 60 notification unit 70 air supply port HS building DR Entrance door BN Stove

Claims (7)

Range hood installed in the building,
a human detection unit that detects approach and/or separation of a person from an entrance door provided in the building;
an opening preparation operation detection unit that detects an opening preparation operation of an entrance door provided in the building;
a control unit that controls the cooker hood based on the detection information of the human detection unit and the detection information of the opening preparation operation detection unit ;
with
The control unit reduces the exhaust air volume when the opening preparation operation detection unit detects an opening preparation operation during operation of the cooker hood, and further reduces the exhaust air volume when the human detection unit detects an approaching person. let
ventilation system. 2. The ventilation system according to claim 1, wherein the control unit restores the exhaust air volume of the cooker hood to the original exhaust air volume when the human detection unit detects separation of the person. further comprising a door detection unit that detects an open state of the front door,
The control unit reduces the exhaust air volume of the range hood when the door detection unit detects that the entrance door is opened after the human detection unit detects the approach of a person during operation of the range hood. 3. The ventilation system according to claim 2 , wherein the original exhaust air volume is restored. further comprising an air supply port that is installed in the building so as to communicate with the outdoors and that can be opened and closed by the control unit;
4. The ventilation according to any one of claims 1 to 3, wherein the control unit controls opening of the air supply port when the human detection unit detects an approach of a person during operation of the cooker hood. system. The range hood is a simultaneous supply and discharge type,
5. The ventilation system according to any one of claims 1 to 4, wherein the control unit increases the amount of supplied air when the human detection unit detects an approach of a person during operation of the cooker hood. 6. The ventilation system according to claim 5, wherein the control unit increases the amount of air supplied to the range hood when detecting the opening preparation operation of the entrance door. 7. The ventilation according to any one of claims 1 to 6, further comprising a notification unit that performs notification when said human detection unit detects an approach of a person or when a preparatory operation for opening said entrance door is detected. system.

Images