JPH07103536A - Ventilation system for building - Google Patents

Abstract

PURPOSE:To carry out necessarily sufficient ventilations in response to contaminated states of the indoor airs in rooms by a facility of a minimum limit. CONSTITUTION:A plurality of rooms 3-5 in a residence 1 are concentrically ventilated at necessarily lowest ventilation amounts of the rooms 3-5 by a central ventilator 2 through an air supply duct 6 and an exhaust duct 10. The rooms 3, 5 have individual ventilators 14, 15 for individually further ventilating the rooms 3, 5 when ventilations exceeding the necessarily lowest ventilation amounts of the rooms 3, 5 are desired. The ventilators 14, 15 have detecting means for detecting contaminated states of the indoor airs of the rooms 3, 5 provided with the individual ventilators 14, 15, and control means for driving the individual ventilators based on output signals of the detecting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation system for a building, and more particularly to a ventilation system for a building that simultaneously ventilates a plurality of rooms.

[0002]

2. Description of the Related Art As a conventional building ventilation system for simultaneously ventilating a plurality of rooms using ducts, there is one disclosed in Japanese Patent Laid-Open No. 2-64330. The ventilation system for a building has a heating / cooling unit, a ventilation unit, and a shunt air duct unit for diverting and introducing indoor air into the heating / cooling unit and the ventilation unit, in the ventilation air conditioner. The heating / cooling unit has a blower fan driven by a blower motor, and a heating / cooling coil for heating or cooling the air discharged from the blower fan, and the ventilation unit includes:
A total for heat exchange between the exhaust fan and the air supply fan driven by the ventilation motor, and the air discharged to the outside by the exhaust fan and the outside air supplied from the outside by the air supply fan. And a heat exchanger. Further, the branch air passage section has a built-in air purifying device and a damper, and the damper introduces indoor air into the heating / cooling section through the air purifying device, or bypasses the indoor purifying device to form a bypass passage. After that, whether to introduce into the heating / cooling unit is switched.

Further, one end of the air supply duct for sending warm air or cold air to each room is connected to the ventilation air conditioner, and a discharge grill is attached to the tip of each room side. On the other hand, one end of the exhaust duct for introducing air from each room to the ventilation air conditioner is connected to the ventilation air conditioner, and a suction grill is attached to the tip of each room side. Furthermore, the ventilation part of the ventilation air conditioner is provided with an outdoor hood for outdoor exhaust and outdoor air supply.

In such a structure, the room air sucked by the suction grilles of the respective rooms and introduced into the diversion air passage of the ventilation air conditioner through the exhaust duct is first divided into the heating / cooling section and the ventilation section. It Then, the indoor air introduced into the ventilation section is pressurized by an exhaust fan driven by a ventilation motor, and is exhausted to the outside from the outdoor hood through the total heat exchanger. At the same time, the outside air is sucked from the outdoor hood by the air supply fan driven by the ventilation motor, is heat-exchanged with the indoor air by the total heat exchanger, and is then introduced into the fan for the heating / cooling unit.

On the other hand, when the indoor air introduced directly into the heating / cooling unit is not dirty, the damper closes the air purifying device and opens the bypass passage, so that the air is blown as it is. After being introduced into a fan and mixed with outside air, it is heated or cooled by a coil and supplied to each room by a discharge grill through an air supply duct to perform heating or cooling and constant ventilation.

Further, when the indoor air is dirty, the air purifier is opened by the damper and the bypass passage is closed, so that the indoor air introduced directly into the heating / cooling unit is not purified by the air purifier. Purified and guided to the fan for air blow,
After being mixed with the outside air, it is heated or cooled by the coil and supplied to each chamber through the air supply duct by the discharge grill to perform heating or cooling and air purification. According to the building ventilation system described above, while constantly suppressing the increase in the heating and cooling load due to ventilation, the indoor air is appropriately switched and purified in a timely manner according to the pollution situation,
Can be returned to the room.

[0007]

By the way, a general house has rooms of various sizes (volumes) of various sizes, and the purpose of use of each room is also the number of people living in each room (hereinafter referred to as the number of living people). Are also varied. For example, the living room has a large volume, and all the people living in the house often meet at the same time, and each person is active. On the other hand, the bedroom has a relatively small volume, the number of living persons is one or two, and the activity is relatively calm due to sleep or the like.

Also, even in a room having the same volume and the same purpose, the child is active, but the activity of the elderly is moderate. Further, for example, in a cafeteria, many people are actively active during meals, but few people come and go except during meals.
In addition, there are cases where there are a large number of smokers and cases where there are no smokers even in a room having the same volume and the same purpose and the same number of living persons. That is,
The indoor air pollution status varies greatly depending on the volume of each room, purpose of use, number of people living, time of use, and user.

However, in the conventional ventilation system for a building described above, the air is simply purified uniformly when the room air in a room is dirty or when there is smoke or smell of cigarettes. Therefore, for example, when a large number of people smoke at once in the guest room, when there is intensive and large-scale indoor air pollution, the ventilation and air purification capacity of the ventilation air conditioner reaches its limit.
There is a drawback that the ventilation and air purification of the room are not performed sufficiently. In addition, if the indoor air is not contaminated at all in one room due to the absence of people, etc., but if the indoor air is contaminated in another room, it is not necessary to ventilate the room. Since even the air is ventilated, there is a problem that the balance of the entire house cannot be balanced, and eventually the heating and cooling load increases, resulting in waste.

The present invention has been made in view of the above-mentioned circumstances, and provides a ventilation system for a building which can realize necessary and sufficient ventilation with a minimum of equipment according to a polluted state of indoor air in each room. The purpose is to do.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide an air supply duct for sending outside air to each of a plurality of arbitrary rooms in a building, and from each room to an indoor room. An exhaust duct for exhausting air, the air supply duct and the exhaust duct are connected to each other, and a central ventilation device that intensively ventilates a required minimum ventilation amount of each of the rooms, and ventilation is performed by the central ventilation device. An individual ventilation device that is provided in at least one of the plurality of rooms and that further ventilates the relevant rooms individually when a ventilation volume exceeding the required minimum ventilation volume of the relevant rooms is desired. It is characterized in that and are provided.

According to a second aspect of the present invention, based on the output signal of the detection means for detecting the state of contamination of the indoor air of each room in which the individual ventilation device is provided, in the individual ventilation device. And a control means for driving the individual ventilation device are added.

[0013]

According to the structure of the invention described in claim 1, the central ventilation device has the minimum required ventilation of each room through the plurality of exhaust ports of each room, the exhaust duct and the plurality of air supply ports and air supply ducts. Ventilate the volume intensively. Further, in the room provided with the individual ventilation device, the control means drives the individual ventilation device based on the output signal of the detection means.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing the structure of a ventilation system for a building according to an embodiment of the present invention. In this drawing, a central ventilation device 2 is provided behind the ceiling of a house 1. Although not shown, the central ventilation device 2 includes a blower fan driven by a blower motor, an exhaust fan and an air supply fan driven by a ventilator motor, and air exhausted outdoors by the exhaust fan. And a heat exchanger for exchanging heat with the outside air supplied from the outside by an air supply fan. A general heat exchange element is used for the heat exchanger.

Further, in the ceiling above the house 1, an air supply duct 6 for sending outside air to each room 3-5 and an exhaust duct for introducing air from each room 3-5 to the central ventilation device 2. And 10 are provided. One end of the air supply duct 6 is connected to the central ventilation device 2 and discharge grills 7 to 9 are attached to the tips on the sides of the chambers 3 to 5, respectively. On the other hand, one end of the exhaust duct 10 is connected to the central ventilation device 2, and the suction grilles 11 to 11 are provided at the tips of the chambers 3 to 5 side.
13 are attached respectively. Further, although not shown, the central ventilation device 2 is provided with an outdoor hood for outdoor exhaust and outdoor air supply.

The central ventilation device 2 may be one that secures the minimum required ventilation amount of each room 3-5. Here, the required minimum ventilation is determined by the volume of the room and the number of people living,
Generally, the ventilation frequency is 0.5 to 1 times per hour,
The ventilation volume is about 15 to 30 cubic meters per hour.

The chambers 3 and 5 each have an individual ventilation device 14 provided with an air supply port (or air supply mini-duct) for taking in outside air and an exhaust port (or exhaust mini-duct) for exhausting indoor air. , 15 are provided. As shown in FIG. 2, each of the individual ventilation devices 14 and 15 is configured, for example, by providing an exhaust ventilation fan 16 at the indoor end portion or the outdoor end portion of the exhaust port or the exhaust mini-duct, and the indoor air pollution. A pollution detection sensor 17 for detecting a state, for example, a smoke sensor or the like, and a control unit 18 for driving the individual ventilation devices 14 and 15 based on an output signal of the pollution detection sensor 17 are provided. Here, the required ventilation amount of the individual ventilation devices 14 and 15 is determined by the living conditions of the rooms 3 and 5. For example, if cigarettes are often smoked in the rooms 3 and 5, the required ventilation is 10 hours per hour.
0 to 300 cubic meters.

In such a structure, the central ventilation device 2
Is always operated. That is, the suction grille 11 of each room 3-5
The indoor air that has been sucked in by ~ 13 and introduced into the central ventilation device 2 through the exhaust duct 10 is pressurized by an exhaust fan driven by a ventilation motor (not shown), passes through the heat exchanger, and is discharged from the outdoor hood to the outside. Is discharged to. At the same time, the outside air is sucked from the outdoor hood by the air supply fan driven by the ventilation motor (not shown), heat-exchanged with the indoor air by the heat exchanger, and then driven by the blower motor (not shown). Installed in a fan for blowers. Next, the air pressurized by the blower fan is supplied through the air supply duct 6 to the respective chambers 3 to 5 by the discharge grilles 7 to 9, whereby constant ventilation is performed.

Further, in each of the rooms 3 and 5, the pollution detection sensor 17 detects the pollution state of the indoor air. Therefore, for example, when many people gather and smoke, the control section causes the pollution. The individual ventilation devices 14 and 15 are driven based on the output signal of the detection sensor 17. As a result, each room 3,
In the chamber 5, local ventilation is provided.

As described above, according to the above-described embodiment, the central ventilation device 2 can be constructed in a small scale because it is only necessary to secure the required minimum ventilation amount of each room 3-5. In particular,
The air supply duct 6 and the exhaust duct 10 which are installed on the ceiling or the like of the house 1 and which are costly, require a minimum scale. Further, since the central ventilation device 2 is always operated, complicated control is not required, the cost can be reduced accordingly, and the reliability is improved.

Further, since the individual ventilation devices 14 and 15 can be independently controlled in the respective chambers 3 and 5, they are not easily affected by other chambers and, unlike the conventional case, even ventilation of unnecessary chambers can be performed. I will not be told. In addition, individual ventilation devices 14, 15
Since the control unit installed for controlling each of the chambers 3 and 5 is independent, wiring with the individual ventilation devices 14 and 15 can be easily performed.

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 the design change and the like without departing from the gist of the present invention. Even this is included in this invention. For example, in the above-mentioned embodiment, in order to exchange heat between the indoor air and the outside air supplied from the outside, an example using a general heat exchange element is shown, but the present invention is not limited to this, and You just need to take in the outside air. Because the central ventilation device 2 only secures the required minimum ventilation, there is not much heat loss even if such a method is used.

Further, in the above-mentioned embodiment, the case where the individual ventilation devices 14 and 15 are configured to have the exhaust ventilation fan 16 has been described, but instead of this, of the air supply port or the air supply mini-duct. An air supply ventilation fan may be provided at the indoor end portion or the outdoor end portion, or an exhaust ventilation fan and an air supply ventilation fan may be provided.

Further, in the above embodiment, the chambers 3, 5
Although the example in which the pollution detection sensor and the control unit that drives the individual ventilation devices 14 and 15 based on the output signal of the pollution detection sensor is provided is shown in FIG. Alternatively, the user may drive the switch with a switch or the like as necessary. Further, in the above-described embodiment, an example in which only the indoor air and the outside air are ventilated has been shown, but the present invention is not limited to this, and the air discharged from the blower fan into the central ventilation device 2 is similar to the conventional technique. A heating / cooling coil and an air purifying device for heating or cooling the
Heating or cooling and air purification may be performed at the same time as ventilation.

[0025]

As described above, according to the ventilation system for a building of the present invention, there is an effect that necessary and sufficient ventilation can be realized with the minimum equipment according to the polluted state of the indoor air in each room.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of a building ventilation system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an individual ventilation device used in the system.

[Explanation of symbols]

 1 House (building) 2 Central ventilation device 3 to 5 rooms 6 Air supply duct 7 to 9 Discharge grill 10 Exhaust duct 11 to 13 Suction grill 14, 15 Individual ventilation device 17 Contamination detection sensor (detection means) 18 Control section (control means) )

Claims (2)

[Claims] 1. An air supply duct for sending outside air to each of a plurality of arbitrary rooms in a building, an exhaust duct for exhausting indoor air from each room, and the air supply duct and the exhaust duct. A central ventilator that is connected to each other and intensively ventilates the required minimum ventilation of each room, and is provided in at least one of the plurality of rooms that is ventilated by the central ventilator, and the relevant respective rooms A ventilation system for a building, comprising: an individual ventilation device for further individually ventilating each relevant room when a ventilation amount exceeding the required minimum ventilation amount of is required. 2. The individual ventilation device drives the individual ventilation device based on an output signal of the detection device and a detection device that detects a contamination state of indoor air in each room in which the individual ventilation device is installed. A ventilation system for a building, comprising: a control means.