JPH08219507A - Ventilation system for multi-rooms - Google Patents

Abstract

PURPOSE: To specify a room where its air quality is deteriorated from among many rooms with a single sensor or a less number of sensors, perform the most suitable ventilation and eliminate any duct. CONSTITUTION: A ventilation controller 9 normally performs an air feeding amount circulation increasing control in which a degree of opening of each of VAV dampers 51 to 54 of a plurality of rooms 31 to 34 to be ventilated is set wide one by one in sequence and in a circulation manner, adjusted and returned back to its original state. At present, it is assumed that when a degree of opening of the VAV damper in a certain room is set to be large and adjusted and further when a detected value of a multi-function sensor 8 of a ventilation fan (a concentrated ventilation device) 7 placed in a room is started to change rapidly, an amount of fed air for that room is separately increased, resulting in that a large amount of contaminated air may flow around the multi-function sensor 8. Then, the ventilation controller 9 performs an air feeding amount abnormal increasing control for setting high and adjusting a degree of opening of the VAV damper of that room until the detected value of the multi-function sensor 8 is returned back to its original value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room ventilation system for centrally monitoring and controlling ventilation states of a plurality of rooms in a building such as a house.

[0002]

2. Description of the Related Art Like a conventional Japanese house, if there is a gap in the room, such as the gap between fittings, and the gaps that open to the outdoors (hereinafter referred to as "external gaps"), there is a proper amount of ventilation even during heating and cooling. Is done naturally. However, in recent years, in order to reduce heat loss during heating and cooling, packing is interposed between doors, doors and fitting frames, and walls, floors, and ceilings are made of panel materials, so that the unit floor area Houses with a so-called airtight and energy-saving structure, in which the external clearance area of the building has been reduced as much as possible, are becoming popular. In such an airtight house, since the ventilation amount is generally insufficient only by natural ventilation, it is necessary to perform multi-room planned ventilation in which the routes of air supply and exhaust are clarified by machines or the like.

A conventional multi-chamber ventilation system for centrally controlling the ventilation of a plurality of rooms has been disclosed in, for example, Japanese Patent Laid-Open No. 60-138.
The ones described in Japanese Patent Laid-Open No. 346 and Japanese Patent Laid-Open No. 03-28641 are known. Of these, the former (JP-A-60
In the system described in JP-A-138346), one air conditioner (main body) installed outside the house and each room are a main road that forms a main stream of conditioned air, and a main road from this main path to each room. The outlet duct is composed of a plurality of branch passages that branch off from each other, a plurality of branch passages for inhaling indoor air, and an intake duct formed of a main passage that forms a main intake stream. Inside the intake duct, on the outdoor side of the trunk road where the indoor air that is sucked and discharged from each room is collected via the branch passage, the indoor air quality (for example, carbon dioxide concentration, humidity, smoke, etc.) ) For monitoring the sensor, the servo motor,
A ventilation door that is opened and closed by the servo motor is provided, and when the carbon dioxide concentration in the suction duct, the humidity condition, etc. exceed a set value, the sensor unit senses and gives a sensing signal to the servo motor. When the servo motor receives a sensing signal from the sensor unit, it opens the ventilation door by an appropriate amount and discharges indoor air contaminated with carbon dioxide or the like to the outside.

Further, in the latter system (described in Japanese Patent Application Laid-Open No. 03-28641), one ventilation fan main body and each room are connected through an intake duct, and the ventilation fan main body is provided with a ventilation air volume between the rooms. An electric damper unit is provided which can adjust the ratio according to an instruction from the control means. In addition, each room is equipped with a sensor that monitors the air quality in the room.
When the carbon dioxide concentration or the humidity condition exceeds the set value, the sensor section senses and gives a sensing signal to the control means. Upon receiving the supply of the detection signal from the sensor unit, the control unit adjusts the electric damper unit so that the ventilation air volume of the room increases, and quickly discharges the contaminated air or steam of the room to the outside.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the conventional system described in JP-A-138346, even if the sensor unit detects contaminated air, as described above, the sensor unit is a main passage in the intake duct where the indoor air sucked and discharged from each chamber joins. Since it was installed in the room, there was a situation in which it was not possible to identify which room was contaminated. Therefore, in this system, when the sensor unit detects contaminated air, it is assumed that all the rooms are contaminated, and it is necessary to take measures to greatly increase the ventilation volume in all the rooms. For this reason, a situation occurs in which even a large number of rooms that do not require emergency ventilation are ventilated in excess of the required amount, and energy is lost by that amount, so that the ventilation of rooms that require emergency ventilation becomes faster. Not be done,
There was a problem in terms of ventilation efficiency and power saving.

On the other hand, in the conventional system disclosed in Japanese Patent Laid-Open No. 03-28641, a sensor unit for monitoring the state of air quality is installed in each room. Since the sensor section is provided in all the rooms, the purchase cost of the sensor becomes high, and if the material cost of the duct and the construction cost are added to this, the total construction cost becomes very high.

The present invention has been made in view of the above circumstances, and uses a limited number of sensors (for example, one sensor or each one type of individual sensor), and the number of chambers larger than the number of sensors is increased. It is necessary to provide a multi-room ventilation system that can centrally monitor the ventilation status and can individually perform emergency ventilation for rooms that are contaminated with air pollution, and that can also eliminate ducts. Has an aim.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided in a plurality of chambers to be ventilated, and a plurality of air-supply units for supplying outdoor air to the respective chambers. Air vents, a plurality of air flow rate changers that are attached to these air supply ports and adjust the air flow rate to each chamber by changing the opening, and the indoor air in the chambers is forced to the outside. An exhaust fan device for exhausting the air, and the indoor air originating from the plurality of chambers is provided at an arbitrary position on the ventilation path through which the indoor air flows in the process of being exhausted by the exhaust fan device. The air quality of the room air is monitored, and based on the detection value supplied from the sensor unit and the detection unit that outputs the detection value according to the state of the air quality, the opening degree of the air flow rate changing unit of any room is set. Control means to control and regulate the amount of air supplied to the room. In a multi-chamber ventilation system, the control means sequentially and circulates one by one or several air quantity changing means in the plurality of rooms to set a large opening for a predetermined time. In addition, the air supply amount circulation up control for returning to the original state is performed and the opening degree of the air flow amount means of any one or some of the chambers is largely set and adjusted. When the detected value is changed, at least until the detected value of the sensor unit starts to return to the original value, the supply air volume emergency up control for further setting and adjusting the opening degree of the variable air volume means of the room is performed. There is.

Further, in order to promote the inflow of indoor air from the plurality of chambers to be ventilated, the invention according to claim 2 does not have the air supply port in the chamber in which the exhaust fan device is provided. 2. The multi-room ventilation system according to claim 1, wherein the control means sets a predetermined opening degree of all the variable air volume means of the plurality of chambers every time the supply air volume circulation up control makes one cycle. While performing the air supply air volume down control for setting and adjusting to be smaller than the normal time, when the detection value supplied from the sensor unit changes during the execution period of the air supply air volume down control, at least the sensor unit Until the detected values start to return to their original values, it is characterized in that the air supply air volume up control is performed so that the opening degrees of all the air flow rate changing means of the plurality of chambers are adjusted to be larger than usual.

Further, the invention according to claim 3 is provided in a plurality of chambers to be ventilated, and a plurality of air supply ports for supplying outdoor air to the respective chambers and attached to the plurality of air supply ports. A plurality of varying air volume means for adjusting the amount of air supplied to each of the chambers by changing the opening degree, and an exhaust fan device for forcibly discharging the indoor air of the plurality of chambers to the outside, The indoor air originating from the plurality of chambers is provided at an arbitrary position on the ventilation path that flows in the process of being discharged by the exhaust fan device, and the air quality of the indoor air is monitored to check the air quality. A sensor unit that outputs a detection value according to the state, and based on the detection value supplied from the sensor unit, controls the opening degree of the air flow rate changing unit in an arbitrary chamber to adjust the amount of air supplied to the chamber. A ventilation system for multiple rooms, comprising: The means always performs the air supply air volume constant control for fixing the opening degree of all the air flow volume means of the plurality of chambers with respect to the time axis, while the detection value supplied from the sensor unit changes, With respect to the air flow rate changing means of the plurality of chambers, one by one, or several by one, in order, in order to increase and adjust the opening degree for a predetermined time and then return to the original state, the air supply air volume is sequentially increased, and When the detection value supplied from the sensor unit changes due to the setting of the opening degree of any one or some of the air flow rate changing units in the chamber to be large, at least the detection value of the sensor unit is the original value. It is characterized by performing the supply air volume emergency up control for setting and opening the opening degree of the air flow rate changing means of the chamber to a larger value until it starts to return to.

Further, according to a fourth aspect of the invention, in order to promote the inflow of indoor air from the plurality of chambers to be ventilated, the chamber in which the exhaust fan device is provided is not provided with the air supply port. 4. The multi-room ventilation system according to claim 3, wherein when the detected value supplied from the sensor unit changes, the control means is provided for each of the plurality of room air flow rate changing means one by one. Or, if the detected value supplied from the sensor section does not change even after performing the sequential increase control of the supply air volume by setting the opening to a large value for a predetermined time in order and returning it to the original state. Is characterized in that the supply air volume is all increased to adjust the opening degree of all the air flow rate changing means of the plurality of chambers to be set larger than usual for a predetermined time.

Further, in the invention described in claim 5, the control means is in the execution of the supply air volume emergency up control according to claim 1 or 3 or the supply air volume all up control according to claim 2 or 4. It is also characterized in that control is performed to enhance the operation of the exhaust fan device and increase the exhaust air volume of the indoor air.

[0013]

In the structure according to claim 1, the control device always (when the indoor air in all the rooms to be ventilated is clean)
Supply air volume circulation up control in which one or some of the air flow rate means in these chambers are sequentially and circulated, the opening degree is largely set and adjusted for a predetermined time, and then returned to the original state. I do. The sensor section is the air quality of the indoor air that has flowed from the above-mentioned rooms to be ventilated (e.g., the generation of toxic gas, the leakage of combustible gas, the increase of carbon dioxide concentration, the dirt and humidity of the air due to the floating of smoke and dust, etc.). ) Is monitored overall, and a detection value corresponding to the air quality is supplied to the control device. The indoor air flowing through the sensor unit includes the indoor air flowing out of each chamber, and the mixture ratio is determined as a function of the distance (fluid resistance) from each chamber to the sensor unit and the opening degree of the air flow rate changing means. It
Now, under the supply air volume circulation up control, if the ventilation resistance is lowered by setting the opening degree of the variable air volume means of any one or some of the chambers to a further large degree, even if there is some time lag. At the position of the sensor portion, the ratio of the room air originating from the room to the whole room increases.

At this time, even if the room air in any other room is very dirty, if the room air in the room is clean, the output value of the sensor unit does not change remarkably (because of other values). Since the air flow rate changing means of the room is not adjusted to a large opening degree and has a high ventilation resistance, the amount of room air of the other room flowing to the sensor portion is relatively small, and , Because the dirt in the atmosphere around the sensor is not noticeable). On the other hand, if the indoor air of the room in which the air volume changing means is set and adjusted is significantly dirty,
Although there is some time lag, at the position of the sensor,
Since the ratio of the indoor air components originating from the room to the entire room increases, the atmosphere around the sensor part becomes dirty quickly. Along with this, the output value of the sensor unit also changes noticeably. The control means knows that air pollution (including an increase in humidity in this specification) has occurred in the room due to a noticeable change in the supplied detection value. And immediately,
By shifting to the air supply air volume emergency up control, the opening degree of the air flow volume control means in the room is set and adjusted to a further large degree. As a result, the discharge rate of the polluted air originating in the room significantly increases, so that the ventilation of the room rapidly progresses.

Further, in the structure according to the second aspect, the control means sets the opening degree of all the air flow rate changing means to be smaller than usual for a predetermined time every time the supply air flow rate circulation up control described above makes one cycle. Performs air volume down control. During the execution period of this control, when the detected value supplied from the sensor part changes noticeably, the control means sets the opening degree of all the variable air volume means of the other chambers to be larger than usual. All up control. In this way, if the exhaust fan device is installed, but the room where the air supply port is not installed (to promote the inflow of indoor air from other rooms) becomes the source of air pollution. However, the contaminated air can be quickly removed from the room.

According to the third and fourth aspects of the invention, the air supply air volume constant control for fixing the opening degree of all the air flow volume changing means of the plurality of chambers to the time axis is always performed, and the emergency air volume control is performed. Performs the supply air volume sequential increase control and the supply air volume emergency increase control, so that the processing is further simplified, and power is not consumed for driving the air volume changing means. therefore,
Very desirable for energy saving.

Further, in the configuration according to the fifth aspect, when the control means performs the supply air volume emergency up control or the supply air volume up control, the operation of the exhaust fan device is strengthened to increase the exhaust air volume of the indoor air. Since the control is performed at the same time, the contaminated air can be eliminated more quickly.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a floor plan showing a schematic configuration of an airtight house in which a multi-room ventilation system according to a first embodiment of the present invention is installed. FIG. 2 shows a ventilation path in the airtight house. FIG. 3 is a plan view showing the electrical configuration of the multi-room ventilation system, FIG. 4 is a flow chart showing an operation procedure of the multi-room ventilation system, and FIG. 5 is a multi-room ventilation system. It is a timing chart which shows operation of a ventilation system. First, an outline of the airtight house of this example will be described with reference to FIG. The airtight house in this example relates to a single-story 3LDK type unit house. As shown in the figure, a corridor 1 runs in the central part of the house along the longitudinal direction, and each room except the bathroom 2 (bedroom 31, children's room) 32, a Japanese-style room 33, a living room 34, a kitchen 35, an entrance hall 36, a toilet 37, a washroom 38) and an opening for people to enter and leave the corridor 1.

Here, a unit house is a building constructed by a method in which one house is divided into several units each having a transportable size in advance and produced in a factory, and these are constructed / assembled at a construction site. is there. The units constituting the unit house include a bedroom 31, a child room 32, and
There are a building unit in which each room such as a Japanese-style room 33, a living room 34, and a kitchen 35 is composed of airtight floor panels, wall panels, ceiling panels, etc., and a roof unit in which the roof part of a house is composed of roof panels, etc. . At the construction site, these units are installed on a pre-prepared foundation, then interconnected, and by completely closing the joint gap between the units that occurs at this time with a gasket,
The entire building has a highly airtight and energy-saving structure with respect to the outdoors.

In the above airtight house, the rooms to be ventilated by the multi-room ventilation system of this example (hereinafter referred to as rooms to be ventilated) are the bedroom 31, the child room 32, and the Japanese-style room 3 of the house.
3, a living room 34, and a kitchen 35. Of these rooms 31 to 35 to be ventilated, each room 31 to 31 except the kitchen 35
34 is provided with hooded air inlets 41 to 44 for taking in fresh air outdoors, and electric VAV dampers 51 to 54 are attached to these air inlets 41 to 44, respectively. ing. Also, bedroom 31 and corridor 1
The door 61 between the child room 32 and the corridor 1, the sliding door 63 between the Japanese-style room 33 and the corridor 1, and the sliding door 64 between the living room 34 and the kitchen 35. Bedroom 31, children's room 3 even when is closed
2 and the Japanese-style room 33 and the corridor 1, and in order to secure the ventilation state between the living room 34 and the kitchen 35, ventilation rales 61a to 64a are provided.

In the kitchen, a ventilation fan (device) 7 is installed in a range hood. The ventilating fan 7 has a role of forcibly excluding hot smoke during rice cooking, but also functions as a central exhaust device of the multi-room ventilation system of this example at all times and in an emergency. Also, the door 65 between the corridor 1 and the kitchen 35
In order to secure the ventilation state between the corridor 1 and the kitchen 35 even when the door 65 is closed, the ventilation gap 65a is provided. In addition, bathroom 2 and toilet 3
7. The washroom 38 is provided with a dedicated ventilation fan as in the conventional case. These chambers 2, 37, 38 are not on the ventilation path that constitutes the multi-chamber ventilation system of this example,
Therefore, it is not a room to be ventilated using the same system and will not be described below.

Next, the electrical construction of the multi-room ventilation system of this example will be described with reference to FIG. As shown in the figure, the multi-room ventilation system of this example has electric VAV dampers 51 to 51 provided in a plurality of rooms (bedroom 31, child room 32, Japanese-style room 33, living room 34) to be ventilated. 54, a ventilation fan (central exhaust device) 7 for forcibly discharging the indoor air of each room 31 to 35 to the outside, and the air quality of the indoor air is monitored, and a detection value corresponding to the state of the air quality is output. Multi-function sensor 8 and VAV dampers 51-54
And a ventilation controller 9 for controlling the opening of the.

VAV damper (variable air volume damper: variable a
As described above, the ir volume dampers 51 to 54 are provided at the air supply ports 41 to 44 of the room to be ventilated (the bedroom 31, the child room 32, the Japanese style room 33, the living room 34), respectively, and individually from the ventilation controller 9. Based on the opening control signal supplied to the air supply ports 41 to 44
Adjust the amount of outdoor air supplied from. In this example, VA
The opening degree of the V dampers 51 to 54 is configured to be switchable in six stages of opening degrees “0” to “5” by the control of the ventilation controller 9. Here, the opening degree “0” is fully closed, the opening degree “1” is the minimum opening degree, the opening degree “2” is a little small opening degree, the opening degree “3” is a normal opening degree, and the opening degree “4” is open. A slightly large degree and an opening degree of "5" mean the maximum degree of opening (fully opened), respectively. In addition, the ventilation fan 7 also switches the exhaust air volume in three stages (weak air operation, medium air operation,
Strong wind operation) is possible.

Further, the multi-function sensor 8 is composed of city gas, LP
A semiconductor gas sensor that detects flammable gas such as gas and toxic gas such as carbon monoxide, and outputs a detection signal according to the concentration of these gases, detects smoke, and responds to the floating amount of smoke per unit volume For example, a smoke sensor that outputs a detection signal, a carbon dioxide sensor that detects carbon dioxide and outputs a detection signal that corresponds to the carbon dioxide concentration, a humidity sensor that uses an organic polymer as a humidity sensitive material, etc. to detect the air quality of indoor air The various sensors are housed in a single sensor case. As will be described later, this multi-function sensor 8 is used for the corridor 1 when the ventilation fan 7 is operating.
The kitchen 35 in which the room air that originates from the bedroom 31, the child room 32, and the Japanese-style room 33 that flows into the kitchen 35 from the side through the ventilation 65a is mixed with the room air in the living room 34 that flows into the kitchen from the ventilation 64a. Is semi-buried on a predetermined ceiling surface (confluence of indoor air) (in FIG. 1, the multifunction sensor 8 is shown as if it is installed on the floor surface, It is installed on the ceiling).

The ventilation controller 9 is a CPU
(Central processing unit) 91, memory 92, input circuit (interface circuit) 93, output circuit 94, and a box (not shown) for accommodating them. In this example, the ventilation controller 9 is installed on the wall surface of the kitchen 35 (see FIG. 1), the input circuit 93 is connected to the multifunction sensor 8 via a communication line, and the output circuit 94 is connected. Are connected in parallel with VAV dampers 51 to 54 via a communication line.

The input circuit 93 is an A / D converter,
It has a waveform shaping circuit, a filter, and an amplifier circuit, and converts an analog detection signal output from the multifunction sensor 8 into a digital signal and supplies it to the CPU 91. Also, the output circuit 94
Indicates the opening control signal sequentially output from the CPU 91 as CP
It is selectively supplied to the VAV dampers 51 to 54 designated by U91. In addition, the memory 92 is a CPU 91.
And a RAM in which a work area of the CPU is set and a detection signal (detection value) supplied from the multifunction sensor 8 is temporarily held.

The CPU 91 is an RO that constitutes the memory 92.
The VAV dampers 51 to 54 are controlled by executing the processing program stored in M using the RAM which also constitutes the memory 92. In other words, the CPU 91 always causes the VAV dampers 51-5 of the chambers 31-34 to be ventilated.
4, after initial setting to a small opening, one by one,
A control (supply air volume circulation up control) is performed in which the air flow rate is circulated in sequence and is changed to a large opening degree, and then the original opening degree is returned after a predetermined time period. On the other hand, when air pollution is detected by the multi-function sensor 8 (with some time lag) when the opening degree of the VAV damper in a certain room is set and adjusted to a large degree based on this air supply air volume circulation up control. In other words, in an emergency when the detection signal (detection value) output from the multi-function sensor 8 suddenly changes in the direction indicating the deterioration of air quality, until the output value of the multi-function sensor 8 starts to return to its original value, The control for controlling the opening degree of the VAV damper in the room to be set to a larger value (control for raising the supply air volume) is performed. The CPU 91 is internally provided with an interval timer 95 composed of a register and an incrementer. The interval timer 95 is capable of knowing the elapsed time and determining a predetermined timing.

Next, the operation of this example will be described with reference to FIGS. For convenience of explanation, window openings and doorways (doors 61, 62, 65, sliding doors 63, 64)
Etc.) are all closed and there is no ventilation from these openings. Now, when the ventilation fan 7 starts a steady operation as a central exhaust device, as shown in FIG. 2, in this airtight house, ventilation is performed along a route as planned in advance.
That is, when the indoor air of the kitchen 35 is forcibly discharged by the operation of the ventilation fan 7, the kitchen 35 becomes a negative pressure with respect to the living room 34 and the corridor 1, and as a result, ventilation 6
Living room 34 and corridor 1 via 4a and 65a
Room air flows into the kitchen 35. In the kitchen 35,
The indoor air flowing in from the living room 34 and the indoor air flowing in from the corridor 1 are mixed with each other, and while being mixed with each other, they are sucked into the ventilation fan 7 while flowing through the location where the multifunction sensor 8 is installed. Is discharged to. At this time, the corridor 1 has a negative pressure with respect to the bedroom 31, the child room 32, and the Japanese-style room 33.
3, the indoor air flows out to the side of the corridor 1 through the ventilation louvers 61a to 63a. As a result, these chambers 31-3
Since 3 has a negative pressure with respect to the outdoors, fresh outdoor air flows into these chambers 31 to 33 through the air supply ports 41 to 43. Similarly, since the living room 34 also has a negative pressure with respect to the outside, the outdoor air flows into the living room 34 via the air supply port 44.

In this way, as shown by the flow of the arrow in the figure, the outside → air supply port 41 (VAV damper 51) → bedroom 31 → ventilation shelter 61a (door 61) → corridor 1 → ventilation shelter 65a (door 65) → Kitchen 35 → Ventilation fan 7 → The first ventilation path W1 that flows in the outdoor route and the outdoor → Air supply port 4
2 (VAV damper 52) → children room 32 → ventilation 6
2a (door 62) → corridor 1 → airflow 65a (door 6
5)-> Kitchen 35-> Ventilation fan 7-> The second passage through the outdoor route
Ventilation path W2 of the outside and the air supply port 43 (VAV damper 5
3) → Japanese-style room 33 → Ventilation sill 63a (sliding door 63) → Corridor 1 → Ventilation sill 65a (door 65) → Kitchen 35 → Ventilation fan 7 → Third ventilation path W3 that flows in the outdoor route and outdoor → Air supply The mouth 44 (VAV damper 54) → living room 34 → airflow 64a (sliding door 64) → kitchen 35 → ventilation fan 7 → the fourth ventilation path W4 that flows through the outdoor route at the same time. Note that these four ventilation paths W1 to W4 merge in the kitchen 35.

When the ventilation controller 9 is powered on in this state, the CPU 91 sets all the VAV dampers 51 to 54 to the opening "2" (slightly small opening) as an initial setting, and the bedroom is exposed from the outside. 5, after the air volume flowing into the child room 32, the Japanese-style room 33, and the living room 34 is set to be a slight wind state (FIG. 4, step SP1), first, FIG.
As shown in (a), only the VAV damper 51 in the bedroom 31 is changed from the opening "2" to the opening "4" (slightly large opening) for a predetermined time T to reduce the ventilation resistance ( Steps SP2 to SP6), whereby the amount of air flowing from the VAV damper 51 into the bedroom 31 is increased. The CPU 91
During the period of increasing the bedroom air volume, it is monitored whether or not the detection signal (detection value) supplied from the multifunction sensor 8 changes in the direction indicating the deterioration of the air quality (step SP5). At this point, if the room air in the bedroom 31 is polluted, the increase in the bedroom air volume causes a relative increase in the air volume flowing into the kitchen 35 from the bedroom 31, and as a result, the bedroom contribution to the room air in the kitchen 35 increases. The output value of the multi-function sensor 8 should change in a direction that indicates deterioration of air quality. On the other hand, if the room air in the bedroom 31 is clean,
As shown in FIG. 7E, the output value of the multifunction sensor 8 should not change noticeably. When the output value of the multi-function sensor 8 is not changed (in the case of "NO" in step SP5) during the period of increasing the bedroom air volume (step SP6), the CPU 91 sets the opening degree of the VAV damper 51 to the original value. State, that is, the state where the opening is "2" (slightly small opening) to increase ventilation resistance (step SP7), and VAV
The amount of air flowing into the bedroom 31 from the damper 51 is returned to the original breeze state.

Next, as shown in FIG. 7B, only the VAV damper 52 of the child room 32 is changed from the opening "2" to the opening "4" (slightly large opening) for a predetermined time T. Change the setting to lower the ventilation resistance (steps SP8 to SP10, SP3
-SP6), the amount of air flowing into the child room 32 from the VAV damper 52 is increased. Even during the period when the child room air volume is increased, the CPU 91 monitors whether or not the detection signal (detection value) supplied from the multifunction sensor 8 changes in a direction indicating deterioration of air quality (step SP5). Even during this period of increasing the air volume in the child room, as shown in (e) of the figure,
If the output value of the multifunction sensor 8 does not change (step S
In the case of "NO" in P5), the opening degree of the VAV damper 52 is returned to the original state, that is, the opening degree "2" (the opening degree is slightly small) to increase the ventilation resistance (step SP7), and the VAV damper 5 is opened.
The amount of air flowing into the child room 32 from 2 is returned to the original breeze condition. Hereinafter, the same processing is performed for the Japanese-style room 33 and the living room 3
4 are sequentially performed ((c) and (ii) in the same figure). And
After one cycle, the process returns to the VAV damper 51 in the bedroom 31 and the above process is repeated. As long as the air quality of the bedroom 31, the child's room 32, the Japanese-style room 33, and the living room 34 is kept in good condition, the CPU 91 executes steps SP1 to S
The process of P9, that is, the supply air volume circulation up control is continuously executed.

However, when the air volume of the child room is started to increase one day (although there is a slight time lag), the output value of the multi-function sensor 8 is of air quality as shown in FIG. If it suddenly changes in a direction that indicates deterioration (in the case of “YES” in step SP5), the child room 3
From the correlation with the increase in the amount of air flowing into the kitchen 35 from 2, it can be considered that the multi-function sensor 8 detected the deterioration of the air quality because the air pollution occurred in the child room 32. Therefore, the CPU 91 shifts to the child room air volume emergency up control. That is, the setting of the VAV damper 52 is changed from the opening "4" to the opening "5" (the maximum degree of opening) (step SP10), and the amount of air flowing from the VAV damper 52 into the child room 32 is greatly increased (Fig. B)).
As a result, the contaminated air in the child room 32 can be transferred to the second ventilation path (child room 32 → ventilation 62a (door 6
2)-> corridor 1-> ventilation 65a (door 65)-> kitchen 3
(5 → Ventilation fan 7 → Outdoor) W2 flows through and is quickly discharged to the outside. When the output value of the multifunction sensor 8 starts to return to the original value ((e) in the figure), the CPU 91 lowers the VAV damper 52 from the opening "5" to the opening "4" (slightly large opening) to supply air. Slightly loosen the air volume (steps SP11 and SP12). Then, when the output value of the multi-function sensor 8 is substantially returned to the original value (step SP13), the supply air volume circulation up control is executed again. That is, the opening degree of the VAV damper 52 is in the original state,
That is, the opening is returned to "2" (slightly small opening) (step SP7), and the air volume flowing from the VAV damper 52 into the child room 32 is returned to the original breeze state.

As described above, according to the configuration of this example, it is possible to identify the room in which the air quality is deteriorated from the plurality of rooms by using a single sensor. Moreover, since it is applied to an airtight house, a duct is unnecessary. Therefore, the equipment cost of the multi-room ventilation system is low. In addition, at all times (unless air pollution is sensed by the multi-function sensor 8), an appropriate ventilation air volume can be secured by the circulation up control of the individual air volume, so that the annual blowing power can be greatly reduced.

Second Embodiment Next, a second embodiment of the present invention will be described. Figure 6
FIG. 7 is a flowchart showing an operation processing procedure of the multi-room ventilation system according to the second embodiment of the present invention, and FIG. 7 is a timing chart showing the operation of the multi-room ventilation system. In the configuration of the second embodiment, the CPU 91 causes the supply air volume circulation up control to make one cycle, that is,
Immediately after the living room air volume increase is completed, the process does not immediately return to the bedroom air volume increase processing, but FIG.
As shown in (i), all VAV dampers 51-54
Is changed to a state of opening “1” (minimum opening) for a predetermined time T, and the chamber 3 to be ventilated through the air supply ports 41 to 44.
The amount of air flowing into 1 to 34 is set to an ultra-light wind state (step SP14 in FIG. 6). This process is called down control of all the supply air volume. When the output value of the multi-function sensor 8 does not change noticeably during the execution period of the all-down control (in the case of “NO” in step SP15), the CPU 91 performs the bedroom air volume up process (steps SP2 to SP6). ) Return to.
On the other hand, during the execution period of all down control, as shown in FIG.
As shown in (e), when the output value of the multi-function sensor 8 suddenly changes in the direction indicating the deterioration of the air quality (in the case of “YES” in step SP15), the bedroom 3 is outdoors.
1, although the air volume flowing into the children's room 32, the Japanese-style room 33, and the living room 34 becomes an ultra-fine wind, the multi-function sensor 8 detects the deterioration of the air quality in the kitchen 3
This is because the air in No. 5 stagnated, so that it can be considered that the air pollution occurred in the kitchen 35. therefore,
The CPU 91 proceeds to step SP17 to execute the all-air supply air volume up control. That is, the CPU 91 determines in step SP17 that all the VAV dampers 51 to 5 are to be used.
4 is set to the state of opening "3" (openness is normal), and the bedroom 31, the child's room 32, the Japanese-style room 33 and the living room 34 are set.
The amount of air flowing into the kitchen 35 from is increased. In this way, the contaminated air in the kitchen 35 is quickly eliminated. CPU9
1 indicates that once the output value of the multifunction sensor 8 returns to the original value (in the case of “YES” in step SP18), all V
After setting the AV dampers 51 to 54 to the state of the opening "2" (step SP19), the supply air volume circulation up control is executed again.

According to the configuration of the second embodiment, the ventilation fan 7
Is installed, but in the kitchen 35 where the air supply port is not installed (to promote the inflow of indoor air from the other rooms 31 to 34), even if air pollution occurs, the kitchen 35
The polluted air can be quickly removed from the.

Third Embodiment Next, a third embodiment of the present invention will be described. FIG.
9 is a flow chart showing an operation processing procedure of the multi-room ventilation system according to the third embodiment of the present invention, and FIG. 9 is a timing chart showing the operation of the multi-room ventilation system. The multi-chamber ventilation system of the third embodiment is greatly different from that of the first embodiment described above. In the first embodiment, the CPU 91 of the ventilation controller 9 always performs the supply air volume circulation up control. However, in the case of an emergency, the air supply air amount emergency up control is performed, whereas in the third embodiment, the CPU 91 always performs the air supply air amount constant control, and in an emergency, the air supply air amount. The point is that it is configured to sequentially perform up control and supply air volume emergency up control. Here, the air supply constant air volume control means the chambers 31 to 34 to be ventilated.
Is a control for fixing the opening degree of all VAV dampers 51 to 54 with respect to the time axis.
This is a control for continuing the process of setting and changing the VAV dampers 51 to 54 one by one to a large opening degree and then returning to the original small opening degree after a lapse of a predetermined time until a room of a pollution source is searched. The supply air volume emergency increase control is a control that, when a room of a pollution source is searched for, the opening degree of the VAV damper of the room is set to be larger to quickly remove the contaminated air.
In addition, since the configuration other than this is the same as that of the first embodiment, the description thereof will be omitted with reference to FIGS. 1 to 3.

In the structure of the third embodiment, the ventilation fan 7
Becomes an operating state as a centralized exhaust device, and when the ventilation controller 9 is powered on, the CPU 91 starts to open all the VAV dampers 51 to 54 at the opening "2" (step SQ1) as an initial setting. (Openness is a little small), and the detection signal (detection value) supplied from the multifunction sensor 8 is set after the amount of air flowing into the bedroom 31, the child's room 32, the Japanese-style room 33, and the living room 34 from the outside is set to a slight breeze state. Then, it is monitored whether or not there is a change in the direction indicating the deterioration of the air quality (step SQ2). Here, unless the deterioration of the air quality is detected by the multifunction sensor 8 (in the case of "NO" in step SQ2), the V of each of the chambers 31 to 34 is reduced.
All of the AV dampers 51 to 54 are fixed to the state of the opening "2" (slightly small opening) (constant supply air volume control).

However, when the multifunction sensor 8 detects air pollution one day, and the output value thereof changes in a direction indicating deterioration of air quality as shown in FIG. 9 (Y) (step SQ2). In case of “YES”), in this example, the bedroom 31, the child's room 32, and the Japanese-style room 33 which are on the upwind side of the kitchen 35.
It is considered that one of the living room 34 and the living room 34 is a pollution source. Therefore, the CPU 91 executes the step SQ.
3, the supply air volume sequential increase control is started. First,
Search whether the bedroom 31 is a pollution source. That is,
As shown in (l) of the figure, the VAV damper 51 in the bedroom 31
Is set to the opening degree "4" (slightly large opening) for a predetermined time T (steps SQ3 to SQ7) to increase the air volume flowing from the VAV damper 51 into the bedroom 31. During this period of increasing the bedroom air volume (step SQ7), when the output value of the multifunction sensor 8 is not changed (in the case of "NO" in step SQ6), the VAV damper 51 is opened by "2" (openness). Return to the (Slightly small) state (step SQ
8), The amount of air flowing into the bedroom 31 from the VAV damper 51 is returned to the original breeze condition.

Even when the detection signal (detection value) of the multi-function sensor 8 slightly changes in the direction in which the deterioration of the air quality is reduced, as shown in FIG. Is determined as “NO”. Because,
As long as the power of the ventilation fan 7 as the central exhaust device is constant, the bedroom 31 to the kitchen 35 can be operated during the period when the bedroom air volume is increased.
As the amount of air flowing into the room increases, children's room 32 and Japanese-style room 33
And, as a result of a decrease in the amount of air flowing from the living room 34 into the kitchen 35, the contribution of the children's room, the contribution of the Japanese room, and the contribution of the living room to the indoor air of the kitchen 35 are reduced.
This is because when 4 is a pollution source, deterioration of the air quality of the kitchen 35 is reduced.

Next, it is searched whether or not the child room 32 is a pollution source (steps SQ8 to SQ10). That is,
As shown in FIG. 7 (o), only the VAV damper 52 of the child room 32 is set to the opening "4" (slightly large opening) for a predetermined time T (steps SQ3 to SQ7), and the VAV is set.
The amount of air flowing into the child room 32 from the damper 52 is increased. During the period of increasing the volume of this child room (Step SQ
7) Even if no change is recognized in the output value of the multifunction sensor 8 (in the case of "NO" in step SQ6), V
The opening degree of the AV damper 52 is returned to the original state, that is, the opening degree "2" (the opening degree is slightly small) (step SQ).
8) Return the amount of air flowing from the VAV damper 52 to the child room 32 to the original breeze condition.

Next, it is searched whether or not the Japanese-style room 33 is a pollution source (steps SQ8 to SQ10). That is, as shown in FIG. 5A, only the VAV damper 53 of the Japanese-style room 33 is set to the opening "4" (slightly large opening) for a predetermined time T (steps SQ3 to SQ7), and the VAV is set. Damper 5
The amount of air flowing into the Japanese-style room 33 from 3 is increased. When the output value of the multifunction sensor 8 suddenly changes in the direction indicating the deterioration of the air quality during the period of increasing the air flow in the Japanese room (in the case of “YES” in step SQ6), the CPU 91 determines that the Japanese room 33 is When it is determined that the air pollution is caused by the pollution source, the air supply air volume emergency up control is performed on the Japanese room 33. That is, VAV
The damper 53 is set to a state where the opening degree is "5" (maximum opening degree) (step SQ11), and the VAV damper 53 is connected to the Japanese-style room 3
The amount of air flowing into No. 3 is greatly increased ((wa) in the figure). As a result, the polluted air in the Japanese-style room 33 is transferred to the third ventilation path (outdoor → air supply port 43 (VAV damper 53) → Japanese-style room 33).
→ Ventilation 63a (sliding door 63) → Corridor 1 → Ventilation 65a (door 65) → Kitchen 35 → Ventilation fan 7 → Outdoor) W
It flows through 3 and is quickly discharged outdoors. The CPU 91
When the output value of the multi-function sensor 8 starts to return to the original value (Y in the figure), the VAV damper 53 is lowered to the opening "4" (slightly large opening) to slightly loosen the supply air volume (step SQ1).
2, SQ13). Then, when the output value of the multifunction sensor 8 falls below a preset reference value (step SQ1
4), judging that the room air in the Japanese-style room 33 has been purified,
The AV damper 53 is returned to the state of the opening "2" (slightly small opening degree) to increase the ventilation resistance, and the amount of air flowing into the Japanese-style room 33 from the outside is set to a slight breeze state (step SQ15). After that, the process returns to the constant air supply amount control (step SQ2). As a result, the VAV dampers 51 to 54 all have the opening "2".
It is fixed to (slightly small opening), and each room 31-34 from the outdoors
The amount of air flowing into is kept in a light wind state unless air pollution is detected by the multifunction sensor 8.

According to the configuration of the third embodiment, at all times,
Instead of the air supply air amount circulation up control of the first embodiment, the air supply air amount constant control is executed, so that the processing of the CPU 91 is further simplified, and power is supplied for driving the VAV dampers 51 to 54. It is not consumed, so it is very preferable for energy saving.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described. Figure 10
Is a flow chart showing the operation processing procedure of the multi-room ventilation system according to the fourth embodiment of the present invention, and FIG.
It is a timing chart which shows operation | movement of the ventilation system for same room. In the above-described third embodiment (FIG. 8), step SQ
Even when it is determined to be "YES" in 10, the process is returned to the constant air supply air volume control (step SQ2).
Contrary to the assumption of the third embodiment, Q10 is judged as “YES” when none of the bedroom 31, the child room 32, the Japanese-style room 33, and the living room 34 is a pollution source. That is, this is the case where the kitchen 35 is a pollution source (see FIG. 3). Therefore, in this fourth embodiment, the bedroom 3
As a result of searching in order of 1, child room 32, Japanese-style room 33, and living room 34 (FIGS. 11 (a) to 11 (t)), it is concluded that none of the rooms 31 to 34 is a pollution source. (In the case of "YES" in step SQ10), it is concluded that the kitchen 35 is a pollution source, and the CPU 91 proceeds to step SQ16 to execute the air supply air volume up control (FIG. 11). That is, the CPU 91 executes the step SP
At 15, all VAV dampers 51 to 54 are set to a state of opening “3” (openness is normal) to reduce ventilation resistance, and flow into the kitchen 35 from the bedroom 31, the child room 32, the Japanese-style room 33 and the living room 34. Increase the air volume. In this way, the contaminated air in the kitchen 35 is quickly eliminated.

When the output value of the multi-function sensor 8 falls below a preset reference value (step SQ17), the CPU 91 determines that the room air in the Japanese-style room 33 has been purified, and opens the VAV damper 53 by the opening ". The airflow resistance is increased by returning to the state of "2" (slightly small openness), and the amount of air flowing into the Japanese-style room 33 from the outside is set to be a slight breeze. After that, the process returns to the constant air supply amount control (step SQ1). As a result, the VAV dampers 51 to 54 are all fixed at the opening degree “2” (slightly small opening), and the air volume flowing into each of the chambers 31 to 34 from the outside is:
Unless air pollution is detected by the multifunction sensor 8,
Keep in a breeze.

With the structure of the fourth embodiment, it is possible to obtain substantially the same effect as that of the third embodiment. In addition, even if the pollution source is the kitchen, it can be searched for and the contaminated air can be quickly removed from the kitchen 35.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described. 12
FIG. 13 is a block diagram showing an electrical configuration of a multi-room ventilation system according to a fifth embodiment of the present invention, and FIG. 13 is a flowchart showing an operation processing procedure of the multi-room ventilation system according to a fifth embodiment of the present invention. Is. In the multi-room ventilation system of this example, substantially the same processing procedure as that described in the fourth embodiment (FIG. 10) is adopted, but as shown in FIG. 12, the ventilation controller 9 a uses the ventilation fan interface 96 to intervene. The configuration is such that the operating state of the ventilation fan 7 is controlled, and the control of the ventilation fan 7 is incorporated in the processing procedure of the CPU 91a, which is a difference from the fourth embodiment (FIG. 3) described above. .

That is, in this fifth embodiment, when the air supply air volume emergency up control is executed, the CPU 91a sets the VAV damper of the specific chamber to the state of the opening "5" (the maximum degree of opening) ( Step SQ11), while greatly increasing the air volume flowing from the VAV damper 53 into the room, the ventilation fan 7
Is switched from a weak wind operation to a medium wind operation or a strong wind operation (or a medium wind operation to a strong wind operation) (step S
Q18).

Similarly, assuming that the kitchen 35 is a pollution source,
When executing the all air supply air volume up control, the CPU 91
a, sets all VAV dampers 51 to 54 to the state of opening "3" (openness is normal) to reduce ventilation resistance (step SQ3), from the bedroom 31, the child's room 32, the Japanese-style room 33 and the living room 34. While increasing the amount of air flowing into the kitchen 35, control is performed to switch the ventilation fan from weak wind operation to medium wind operation or strong wind operation (or medium wind operation to strong wind operation) (step SQ19). According to the configuration of the fifth embodiment, the control for increasing the opening degree of the predetermined VAV damper and the control for strengthening the operation of the ventilation fan 7 are performed at the same time.
Contaminated air can be eliminated more quickly.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example, the sensor is not limited to a multifunctional sensor, and may be composed of only a carbon dioxide sensor, a smoke sensor, or a gas sensor, for example. The number of rooms to be ventilated is not limited to 5, but can be increased or decreased as appropriate. It can be applied not only to single-storey buildings but also to two-story buildings (in this case, the stairwell space also forms part of the ventilation path). The ventilation controller and the VAV damper are not limited to being wired but may be wireless. Further, when the number of rooms to be ventilated is large, the supply air volume circulation up control may be performed by dividing into several rooms. The multi-room ventilation system of the present invention can use a duct when applied to a house with low airtightness. The ventilation fan is not limited to the one installed in the range hood. The location of the ventilation fan is not limited to the kitchen.

[0050]

As described above, according to the multi-room ventilation system of the present invention, a room with deteriorated air quality can be identified from a large number of rooms by using a single sensor or a small number of sensors. be able to. Also, if applied to an airtight house, no duct is required. Therefore, the cost of installing this type of ventilation system is low. Further, while the proper ventilation air volume is secured at all times by controlling the circulation of the individual air volume, the emergency air volume increase control is performed in an emergency, so that the annual blow power can be greatly reduced.

According to the second aspect of the present invention, the chamber where the exhaust fan device is installed but the air supply port is not installed (to promote the inflow of indoor air from another room). Even if is a source of air pollution, the contaminated air can be quickly removed from the room.

According to the third and fourth aspects of the invention, the air supply air volume constant control for fixing the opening degree of all the air volume changing means of the plurality of chambers to the time axis is always performed. Is further simplified, and in order to drive the variable air volume means,
No power is consumed. Therefore, it is very preferable for saving energy. Further, according to the structure of claim 5, when the control means performs the air supply air volume emergency up control or the air supply air volume up control, the operation of the exhaust fan device is strengthened to increase the exhaust air volume of the indoor air. Since the control is performed at the same time, the contaminated air can be eliminated more quickly.

[Brief description of drawings]

FIG. 1 is a floor plan showing a schematic configuration of an airtight house in which a multi-room ventilation system according to a first embodiment of the present invention is installed.

FIG. 2 is a plan view showing a ventilation path in the airtight house.

FIG. 3 is a block diagram showing an electrical configuration of the multi-room ventilation system.

FIG. 4 is a flowchart showing an operation procedure of the multi-room ventilation system.

FIG. 5 is a timing chart showing an operation of the multi-room ventilation system.

FIG. 6 is a flowchart showing an operation procedure of the multi-room ventilation system according to the second embodiment of the present invention.

FIG. 7 is a timing chart showing the operation of the multi-room ventilation system.

FIG. 8 is a flow chart showing an operation procedure of the multi-room ventilation system according to the third embodiment of the present invention.

FIG. 9 is a timing chart showing the operation of the multi-room ventilation system.

FIG. 10 is a flow chart showing an operation procedure of the multi-room ventilation system according to the fourth embodiment of the present invention.

FIG. 11 is a timing chart showing an operation of the multi-room ventilation system.

FIG. 12 is a block diagram showing an electrical configuration of a multi-room ventilation system according to a fifth embodiment of the present invention.

FIG. 13 is a flowchart showing an operation procedure of the multi-room ventilation system.

[Explanation of symbols]

 1 Corridor 31 Bedroom (room to ventilate) 32 Children's room (room to ventilate) 33 Japanese room (room to ventilate) 34 Living room (room to ventilate) 35 Kitchen (room to ventilate) 41-44 Air inlet 51-54 VAV damper (variation amount means) 61a-65a Ventilation 7 Ventilation fan (exhaust fan device) 8 Multifunctional sensor (sensor part) 9,9a Ventilation controller (control means) 91, 91a CPU (central processing unit) 92 memory

Claims (5)

[Claims] 1. A plurality of air supply ports provided in a plurality of chambers to be ventilated to supply outdoor air to the respective chambers,
Attached to the plurality of air supply ports, a plurality of air flow rate changing means for adjusting the amount of air supply to each of the chambers by changing the opening degree, and forcibly discharging the indoor air of the plurality of chambers to the outside. An exhaust fan device for, and the indoor air that originates from the plurality of chambers is provided at any location on the ventilation path through which the indoor air flows in the process of being discharged by the exhaust fan device. A sensor unit that monitors the quality and outputs a detection value according to the state of the air quality, and based on the detection value supplied from the sensor unit, controls the opening degree of the air flow rate changing unit in an arbitrary chamber to A multi-chamber ventilation system consisting of a control means for adjusting the amount of air supplied to a room, wherein the control means, relative to the air flow rate means for the plurality of rooms,
One or a few of them are sequentially circulated, and the opening degree is set to a large value for a predetermined time to return to the original state. When the detection value supplied from the sensor unit changes due to a large setting adjustment of the opening degree of the air change amount means of the chamber, at least until the detection value of the sensor unit starts to return to the original value. A multi-room ventilation system characterized by performing an air supply air volume emergency up control for further setting and adjusting the opening degree of the air flow rate changing means. 2. The air supply port is not provided in a chamber provided with the exhaust fan device in order to promote inflow of room air from the plurality of chambers to be ventilated. In the room ventilation system, the control means sets and adjusts the opening degree of all the air flow rate changing means of the plurality of rooms to be smaller than usual for a predetermined time every time the supply air flow rate circulation up control makes one cycle. When the detection value supplied from the sensor unit changes during the execution period of the supply air volume down control, at least until the detection value of the sensor unit starts to return to the original value. A multi-chamber ventilation system for performing a total air supply volume up control for setting and adjusting the opening degree of all the air flow rate changing means of the plurality of chambers to be larger than usual. 3. A plurality of air supply ports provided in a plurality of chambers to be ventilated for supplying outdoor air to the respective chambers,
Attached to the plurality of air supply ports, a plurality of air flow rate changing means for adjusting the amount of air supply to each of the chambers by changing the opening degree, and forcibly discharging the indoor air of the plurality of chambers to the outside. An exhaust fan device for, and the indoor air that originates from the plurality of chambers is provided at any location on the ventilation path through which the indoor air flows in the process of being discharged by the exhaust fan device. A sensor unit that monitors the quality and outputs a detection value according to the state of the air quality, and based on the detection value supplied from the sensor unit, controls the opening degree of the air flow rate changing unit in an arbitrary chamber to A multi-room ventilation system comprising a control means for adjusting the amount of air supplied to the chambers, wherein the control means is, at all times, the opening degree of all the variable air volume means of the plurality of chambers with respect to the time axis. While performing fixed air supply volume constant control, the sensor unit supplies it. When the detected value supplied is changed, the opening degree of each of the air flow rate changing means of the plurality of chambers is adjusted one by one, or several by a large amount for a predetermined time, and then returned to the original state. When the detection value supplied from the sensor unit changes due to the fact that the supply air volume is sequentially increased and the opening degree of any one or several of the air volume changing means of the chamber is set to be large. A multi-room ventilation system characterized by performing an air supply volume emergency up control for further setting and adjusting the opening degree of the variable air volume means of the room at least until the detection value of the sensor unit starts to return to the original value. 4. The multi-passage according to claim 3, wherein in order to promote the inflow of indoor air from the plurality of chambers to be ventilated, the air supply port is not provided in the chamber in which the exhaust fan device is provided. A ventilation system for a room, wherein the control means, when the detection value supplied from the sensor unit changes, one or several, one by one, with respect to the air flow rate changing means of the plurality of rooms, If the detected value supplied from the sensor unit does not change even after performing the air-supply air volume sequential up control that largely adjusts the opening degree for a predetermined time and returns to the original state, all of the plurality of chambers Ventilation system for multiple rooms, characterized in that the air supply amount all-up control is performed by adjusting the opening degree of the variable air volume means to a value larger than usual for a predetermined time. 5. The operation of the exhaust fan device during the execution of the supply air volume emergency up control according to claim 1 or 3 or the supply air volume all up control according to claim 2 or 4. The multi-room ventilation system is characterized by executing control to increase the exhaust air volume of the indoor air.