JPH10110989A - Ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a chemical substance anaphylaxis by simultaneously supply ing and exhausting the air when indoor side chemical substance concentration exceeds an allowable limit value, cleaning the outdoor air by a filter, heat exchanging it, supplying it to the indoor side, introducing the indoor side contam inated air to a return air route, removing it by the filter, and then returning it to the indoor side. SOLUTION: When chemical substance concentration of the indoor side R exceeds an allowable limit value, a sensor 12 senses it, and operates exhaust and supply fans 5, 6. The air of the indoor side R is introduced from a ventilating inlet 1a at the route 1 during operating, passed through a total heat exchanger 9, and exhausted from an exhaust outlet 1b to the outdoor side P. The air of the outdoor side P is introduced from an air supply inlet 2 at an air supply route 2, passed through the exchanger 9 and a first filter 8 for attracting pollen and dust and supplied from an air supply outlet 2b to the indoor side R. Contaminated air of the indoor side R is introduced at a return air route 3, cleaned by a second filter 10 for attracting chemical substance, combined within the route 2, and supplied to the indoor side R together with the supply air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system for exhausting chemical substances generated indoors, removing pollen and dust contained in air taken in from the outside, and exchanging heat to supply clean air indoors. Pertaining to a ventilated system.

[0002]

2. Description of the Related Art Recently, in newly built houses and condominiums, the situation of complaining of physical problems such as sore throat, redness of eyes, dizziness, malaise, nausea due to bad smell, and feeling sick has increased. In severe cases, pulmonary dysfunction, heart and vascular diseases, skin diseases, endocrine disorders and the like may occur. This is thought to be due to various chemical substances (volatile organic compounds) drifting in the room, such as adhesives and paints used for building materials, insecticides and preservatives for wood treatment, plasticizers and wallpaper for wood. Fungicides, insect repellents and flame retardants for carpets and curtains, etc. have been found to be sources. In particular, a house with high airtightness and high heat insulation suffers more damage, which is a problem called chemical sensitivity, and is known as sick building syndrome in Europe and the United States. As measures for this defense, for example, there are means such as opening a window to frequently ventilate or forcibly exhausting contaminated air in a room using a ventilation fan. However, opening a window is troublesome and includes pollen and dust. There is a problem that dirty outside air flows into the room, causing hay fever and asthma.In the case of forced exhaust by a ventilation fan, not only does the indoor environment adjusted by the cooling and heating device deteriorate, but also energy loss in cooling and heating results in improper Economy. Further, there is a means for purifying indoor air using an air purifier, but at present, satisfactory results have not been obtained.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional situation. The present invention discharges volatile organic compounds generated in a room, prevents energy loss in cooling and heating, and allows indoors to be cooled. It is an object of the present invention to provide a ventilation system capable of preventing invasion of polluted outside air such as pollen and dust.

[0004]

As a means for technically solving the above-mentioned problems, the present invention provides an exhaust path and an air supply path by connecting an indoor side and an outdoor side, and provides the exhaust path and the air supply path. A total heat exchanger is provided by crossing the air path in the middle, and an exhaust fan is disposed at a key point of the exhaust path. An air supply fan and pollen, dust, etc. are provided at a key point of the air supply path. A first filter that adsorbs the chemical substance, and one end is opened to the indoor side, and the other end is provided with a return air path connected in the middle of the air supply path. The gist is that a second filter is provided and a sensor for detecting a chemical substance is provided on the indoor side, and the exhaust fan and the air supply fan are controlled to operate by the sensor.

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a ventilation system according to the present invention. An exhaust path 1 and an air supply path 2 are formed by arranging an air duct or the like by connecting an indoor side R and an outdoor side P to each other. Further, one end side is opened to the indoor side R, and the other end side is connected to the middle of the air supply path 2 and an air duct or the like is provided to form a return air path 3.

The exhaust passage 1 is provided with an exhaust inlet 1a opening to the indoor side R and an exhaust outlet 1b opening to the outdoor side P. Subsequently, an exhaust damper 4 and an exhaust fan 5 are provided.

The air supply path 2 is provided with an air supply inlet 2a that opens to the outdoor side P, and an air supply outlet 2b that opens to the indoor side R. An air supply fan 6, an air supply damper 7, and a first filter 8 are arranged in this order near the outlet 2b.

The first filter 8 is for adsorbing pollen, dust and the like contained in the outside air taken in from the air supply inlet 2a of the air supply path 2, and is, for example, a fine mesh made of fibers or the like. A filter material formed in a shape can be used, and this filter material is preferably configured to be replaceable.

Reference numeral 9 denotes a total heat exchanger, which is configured so that the exhaust path 1 and the air supply path 2 pass three-dimensionally intersecting at right angles. When the supply air inside passes through the total heat exchanger 9, heat exchange can be performed between them.

[0010] The return air path 3 has an indoor side R at one end.
The other end is connected between the air supply damper 7 and the first filter 8 in the air supply path 2, and the return air inlet 3a is opened.
Near the second filter 10 and the return air damper 11
And are arranged.

The second filter 10 is for adsorbing chemical substances (volatile organic compounds) contained in room air taken in from the return air inlet 3a.
For example, activated carbon impregnated with KOH etc. for acid gas,
Activated carbon impregnated with H ₂ SO ₄ can be used to remove hydrocarbons, and highly activated activated carbon can be used for high molecular weight hydrocarbons.
Select an appropriate substance depending on the type of chemical substance.

Reference numeral 12 denotes a sensor which is disposed toward the indoor side R so as to detect a chemical substance in the air in the room. When the detected concentration exceeds an allowable limit, a control device (see FIG. The exhaust fan 5 and the air supply fan 6 are operated via a wiring (not shown) and the wiring 13, and can be stopped when the detected concentration falls below the allowable limit. That is, the concentration of the chemical substance on the indoor side R is detected and the operation of the exhaust fan 5 and the air supply fan 6 is controlled. Furthermore, it is also possible to adjust the air volume of the fan according to the detected concentration.

The sensor 12 detects, for example, an odor sensor for detecting the odor of a chemical substance or a change in frequency due to the adhesion of a chemical substance (adhering a chemical substance to a thin film given a constant frequency by a quartz oscillator). A vibration sensor or the like for detecting can be used.

[0014] The ventilation system configured as described above includes:
When the chemical substance concentration of the indoor side R exceeds 0.08 ppm (WHO recommendation value) in the case where the concentration of the chemical substance in the indoor side R exceeds, for example, 0.08 ppm (WHO recommendation value). The sensor 12 detects this and operates the exhaust fan 5 and the air supply fan 6 to operate the ventilation system.

During operation of the ventilation system, in the exhaust passage 1, air in the indoor side R is taken in from the exhaust inlet 1a by the operation of the exhaust fan 5 and passes through the total heat exchanger 9 for exhaust. The air is exhausted from the outlet 1b to the outdoor side P. Therefore, the indoor air contaminated with the chemical substance is forcibly exhausted to the outdoor side P. The amount of exhaust is adjusted by the exhaust damper 4.

At the same time, in the air supply path 2, the air on the outdoor side P is taken in from the air supply inlet 2 a by the operation of the air supply fan 6, and the air inside the total heat exchanger 9 and the first filter 8 is removed. The air passes through the air supply outlet 2b and is supplied to the indoor side R. At this time, pollen and dust are removed by the first filter 8, and clean air is forcibly supplied to the indoor side R.
The air supply amount is adjusted by the air supply damper 7.

The supply air supplied to the indoor side R and the exhaust gas discharged to the outdoor side P are heat-exchanged with each other when passing through the total heat exchanger 9 in a three-dimensional manner, and the moisture is also reduced. When the indoor side R is cooled in summer or the like, the exhaust air is cooled, and the supply air is cooled by the cool air and supplied to the indoor side R. In the winter or the like, the indoor side R is cooled.
Is heated, the exhaust air is warm, so the supply air is warmed by this warm air and supplied to the indoor side R. Therefore, the indoor environment adjusted by an air conditioner such as an air conditioner can be prevented from being damaged, and energy loss of cooling and heating can be prevented.

On the other hand, in the return air path 3, air contaminated with the chemical substance on the indoor side R is taken in from the return air inlet 3 a by the operation of the air supply fan 6, and the second filter 10 is removed. When passing, the chemical substance is adsorbed and the purified air merges into the air supply passage 2 and together with the air cleaned by the first filter 8 flows from the air supply outlet 2b to the indoor side R. Supplied. That is, the air is cleaned while circulating the air on the indoor side R contaminated by the chemical substance. The return air amount is adjusted by the return air damper 11.

In this way, by simultaneously supplying and exhausting the indoor side R, the concentration of the chemical substance in the room is reduced. When the sensor 12 detects the concentration below the allowable limit, the exhaust fan 5 and the air supply fan 6 are detected. And the operation of the ventilation system is automatically stopped.

The position of the first filter 8 is not limited to the above-mentioned position, but may be arranged near the air supply inlet 2a in the air supply path 2 as shown in FIG. The position of the second filter 10 is not limited to the above-mentioned position. For example, as shown in FIG. 3, the position of the second filter 10 may be adjacent to the position beyond the junction of the air supply path 2 and the return air path 3 together with the first filter 8. It may be arranged. Further, the ventilation system according to the present invention can be used alone or in conjunction with an air conditioner such as an air conditioner, or can be used in combination.

[0021]

As described above, according to the ventilation system of the present invention, the concentration of a chemical substance in the indoor air is detected by the sensor, and when the concentration exceeds the allowable limit, the exhaust path and the supply path are detected. At the same time, air is supplied and exhausted to and from the outdoor side through the air. At this time, the air taken in from the outdoor side is cleaned by removing pollen and dust contained in the air with a filter, and the total heat exchanger is removed. To exchange heat and supply it indoors.
In addition, since the contaminated air from the indoor side is taken into the return air path, chemical substances are removed by a filter, and then returned to the indoor side and circulated, the concentration of chemical substances in the indoor air must be kept below the allowable limit. This has the advantage of preventing chemical substance hypersensitivity, which has been a problem in the past, as well as preventing energy loss in cooling and heating, and preventing the ingress of polluted air such as pollen and dust into the room. Play.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a ventilation system according to the present invention.

FIG. 2 is a partial view showing another arrangement of the first filter.

FIG. 3 is a partial view showing still another arrangement of the second filter and the first filter.

[Description of Signs] 1 ... Exhaust path 1a ... Inlet for exhaust 1b ... Outlet for exhaust 2 ... Supply path 2a ... Inlet for supply 2b ... Outlet for supply 3 ... Return path 3a ... For return air Inlet 4 ... Exhaust damper 5 ... Exhaust fan 6 ... Air supply fan 7 ... Air supply damper 8 ... First filter 9 ... Total heat exchanger 10 ... Second filter 11 ... Return air damper 12 ... Sensor 13… Wiring

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F24F 7/007

Claims (1)

[Claims] An exhaust path and an air supply path are provided by connecting the indoor side and the outdoor side, and a total heat exchanger is provided by intersecting the exhaust path and the air supply path on the way. An exhaust fan is provided at an important point, and an air supply fan and a first filter for adsorbing pollen, dust, etc. are provided at an important point in the air supply path. The end is provided with a return air path connected in the middle of the air supply path, a second filter for adsorbing a chemical substance is disposed at a key point of the return air path, and a sensor for detecting the chemical substance is provided inside the room. A ventilation system provided so as to control the operation of the exhaust fan and the air supply fan by the sensor.