JPH0861731A - Air supply and exhaust apparatus - Google Patents

Abstract

PURPOSE: To detect humidity and noxious gas concentration in a room and to cooperatively operate or stop an air conditioner by imparting humidity detecting and noxious gas concentration detecting functions to an air supply and exhaust apparatus. CONSTITUTION: An infrared sensor or an absolute humidity sensor is formed as a humidity detecting function in an air supply and exhaust apparatus. A function of regulating indoor humidity capacity and the detection of the humidity, carbon dioxide gas concentration, carbon monoxide concentration are conducted by the wavelength absorption in a predetermined area to operate or stop the apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply / exhaust device for forcibly ventilating indoor air.

[0002]

2. Description of the Related Art An air supply / exhaust device is often used for the purpose of ventilating indoor air, but a person inside the room judges the degree of pollution and operates or stops it. Indoor humidity, carbon dioxide concentration,
There is no function to detect air quality such as carbon monoxide concentration and automatically stop the operation.

[0003]

Therefore, in the air supply / exhaust system having the above-mentioned conventional structure, the degree of contamination in the room is unknown, and therefore the system often operates after the physical condition becomes unsatisfactory.

Further, when indoor combustion equipment such as an oil stove is used, since it is hardly ventilated, the concentration of carbon dioxide gas and carbon monoxide in the room may increase, which may lead to deterioration in physical condition. Leading to an addiction accident. Therefore, a supply / exhaust device that detects the concentration of carbon dioxide and carbon monoxide in the room and automatically ventilates is required.

Further, in the case of a house that has been absent for a long period of time, the condition that the shutter is closed for the purpose of crime prevention continues, but there is a risk that household goods will be moldy and damaged by dew condensation due to an increase in indoor humidity. Therefore, an air supply / exhaust device that detects indoor humidity and automatically ventilates is required.

Regarding the infrared sensor provided in the air supply / exhaust device, when dew condensation occurs on the infrared ray generation part and the detection part, the detection accuracy of the sensor is lowered. Therefore, in order to maintain the long-term characteristics of the infrared sensor, the dew condensation is prevented. It was necessary to do.

In order to detect the humidity, the concentration of carbon dioxide, and the concentration of carbon monoxide, a means for measuring the infrared transmittance or the absorbance in a specific fixed wavelength region is effective, but there is no means for setting the wavelength region. It was

[0008]

[Means for Solving the Problems] By configuring an infrared sensor or an absolute humidity sensor for detecting humidity on the indoor side or the indoor side and the outdoor side of the air supply / exhaust device, the difference between the indoor and outdoor humidity of the air supply / exhaust device. It is possible to control the dehumidifying performance by controlling the operation and stop of the air supply / exhaust device by detecting the.

In order to prevent the dew condensation due to the water vapor of the infrared sensor, it can be solved by heating the infrared sensor and the detection portion or by applying water repellency treatment.

By having the function of setting the wavelength range detected by the infrared sensor by the prism, grating, and beam splitter, the humidity and the carbon monoxide concentration or the carbon dioxide concentration can be detected simultaneously or at regular intervals.

Regarding the infrared detection range, the humidity detection range is 2.7 μm to 4.2 μm, and the carbon dioxide detection range is 5.0.
μm ~ 5.6μm, carbon monoxide detection range 6.0μm
Each of them is set to ˜6.3 μm, the infrared transmittance or the transmittance in a certain wavelength range is converted into the absorbance, the concentration is detected, and when the carbon monoxide concentration and the carbon dioxide concentration exceed the set value, the air supply / exhaust is performed. The system has a function to display cautions, warnings, etc., or an alarm function for turning on a lamp, and an automatic operation function.

[0012]

The present invention has the following functions due to the above-mentioned constitution.

That is, the air supply / exhaust system of the present invention comprises an infrared sensor or an absolute humidity sensor for detecting humidity on the indoor side, or on the indoor side and the outdoor side, so that the difference between the indoor and outdoor humidity of the air supply / exhaust apparatus. Is detected and the movement and stop of the air supply / exhaust device are controlled, so that the indoor air is kept constantly in a clean state.

The absolute humidity sensor can detect absolute humidity regardless of temperature, and is not affected by temperature change.

The infrared sensor can detect the absolute amount of water such as water vapor by infrared transmittance or absorbance, and is not affected by temperature or the like.

The infrared sensor can detect the gas concentration such as the carbon monoxide concentration or the carbon dioxide concentration based on the infrared transmittance or the absorbance.

Further, by detecting the gas concentration such as the carbon monoxide concentration or the carbon dioxide concentration, it is possible to quantitatively inform and warn or warn the state of contamination of the indoor air. Therefore, a clean room can be maintained by opening the windows of the room due to the contamination state of the room air.

[0018]

【Example】

(Example 1) In a laboratory where the room temperature was set to 28 ° C and the relative humidity was set to 85%, the room temperature was 20 ° C and the relative humidity was 50%.
The air supply / exhaust device was set to stop in the state of%.

An absolute humidity sensor was attached to the indoor air intake portion of the air supply / exhaust device to detect the indoor humidity, and the air conditioner was stopped when the humidity was reduced to a certain level or less. The humidity and temperature at this time were maintained under the set conditions.

(Example 2) In a laboratory in which the room temperature was set to 28 ° C and the relative humidity was set to 85%, the air supply / exhaust device was set to stop when the room temperature was 20 ° C and the relative humidity was 50%.

An infrared sensor was attached to the indoor air intake portion of the air supply / exhaust device to detect the indoor humidity, and the air conditioner was stopped when the humidity was reduced to a certain level or lower. The humidity and temperature at this time were maintained under the set conditions.

(Embodiment 3) In a laboratory in which an open-type combustor is burning, an infrared sensor is attached to the intake portion on the indoor side of the air supply / exhaust device to measure the carbon monoxide concentration and the carbon dioxide concentration in the room. Was detected.

Regarding the carbon dioxide concentration, it was possible to detect the carbon dioxide concentration because a correlation was found between the carbon dioxide concentration and the absorbance of infrared rays irrespective of the rise in room temperature.

Regarding the carbon monoxide concentration, a correlation was found between the carbon monoxide concentration and the absorbance of infrared rays regardless of the increase in the room temperature, and the carbon monoxide concentration could be detected.

(Embodiment 4) A transparent fluororesin having an amorphous structure, which is a water-repellent resin having a high infrared transmission performance in the infrared detecting portion, for example, CYTOP manufactured by Asahi Glass Co., Ltd. The infrared sensor coated with (SYTOP) showed no change in characteristics even when the infrared amount was measured in a high temperature and high humidity state. However, the infrared sensor not coated with the infrared detecting part was Due to dew condensation, low transmittance (high absorbance) was exhibited and the characteristics were changed.

(Embodiment 5) The infrared sensor having its infrared detecting portion heated did not show any change in its characteristics even when the amount of infrared rays was measured in a high temperature and high humidity state, but the infrared detecting portion did not heat the infrared sensor. Shows a low transmittance (high absorbance) and changes its characteristics due to dew condensation on the detection part of the infrared sensor.

[0027]

【The invention's effect】

(1) Humidity detection by an infrared sensor detects infrared transmittance or absorbance, so that accurate humidity can be detected without being affected by temperature.

(2) Since the absolute humidity sensor does not change relative humidity with temperature unlike the relative humidity sensor, it is possible to detect accurate humidity that is not affected by temperature.

(3) Since the carbon dioxide gas concentration detection by the infrared sensor is carried out by infrared transmittance or absorbance, the carbon dioxide gas concentration can be accurately detected without being affected by temperature and humidity.

(4) Since the carbon monoxide gas concentration detection by the infrared sensor is carried out by infrared transmittance or absorbance, the carbon monoxide gas concentration can be accurately detected without being affected by temperature and humidity.

(5) Since the infrared sensor detects the gas concentration in the room and has a function of operating the air supply / exhaust device when the gas concentration exceeds a set value and a function of stopping when the gas concentration falls below a certain level, maintaining clean room air , To prevent poisoning accidents.

(6) By heating the infrared ray generating portion for detecting humidity or the infrared ray detecting portion in the infrared ray sensor, it is possible to protect from performance deterioration or malfunction due to dew condensation of water vapor or the like.

(7) By covering the infrared ray generating portion or the infrared ray detecting portion for detecting humidity in the infrared sensor with a water-repellent resin having a high infrared ray transmitting performance, performance deterioration or malfunction due to dew condensation of water vapor etc. Can be protected from.

(8) By covering the infrared ray generating portion or the infrared ray detecting portion in the infrared sensor for detecting humidity or the infrared ray detecting portion with a transparent fluororesin having a high infrared ray transmitting performance, performance deterioration or malfunction due to dew condensation of water vapor etc. Can be protected from.

(9) The humidity detection and the gas concentration detection by the infrared sensor have the function of setting them in a constant wavelength region by a prism, grating, beam splitter, etc. for decomposing infrared rays, and the infrared transmittance in the constant wavelength region. Alternatively, the humidity and the gas concentration can be detected independently by detecting the absorbance, and the humidity and the gas concentration can be accurately detected without being influenced by each other.

(10) Since the infrared transmittance or the absorbance obtained by converting the transmittance in the infrared wavelength region of water in the range of 2.7 μm to 4.2 μm is regarded as humidity and is detected, it is not disturbed by other gases. , The accurate humidity can be detected.

(11) Since the infrared transmittance or the absorbance obtained by converting the transmittance in the infrared wavelength region of carbon dioxide in 5.0 μm to 5.6 μm is detected,
Accurate carbon dioxide concentration can be detected without interference from other gases.

(12) Since the infrared transmissivity of the carbon monoxide in the infrared wavelength region of 6.0 μm to 6.3 μm or the absorbance obtained by converting the transmissivity is detected, it is accurate without being interfered by other gases. The carbon monoxide concentration can be detected.

(13) 2.7 μm to 4.2 μm and 5.0
Since the humidity and the carbon dioxide concentration are detected by arbitrarily controlling either or both of the constant wavelength regions of μm to 5.6 μm, the function can be used as necessary.

(14) By detecting the carbon monoxide concentration and the carbon dioxide concentration, it is possible to quantitatively judge the pollution state of the indoor air, and display warnings or warnings or turn on the lamp depending on the indoor pollution state. Since the alarm function is configured, a clean room is maintained by opening the windows of the room due to the state of indoor air pollution, and the poisoning accident is prevented.

Claims (14)

[Claims] 1. An air supply / exhaust device provided with a function of detecting humidity by an infrared sensor or an absolute humidity sensor. 2. An air supply / exhaust device provided with a function of detecting a gas concentration in a room by an infrared sensor. 3. An air supply / exhaust device provided with a function of detecting humidity by an infrared sensor or an absolute humidity sensor and carbon dioxide concentration by the infrared sensor. 4. An air supply / exhaust device provided with a function of detecting a humidity by an infrared sensor or an absolute humidity sensor and a carbon monoxide concentration by the infrared sensor. 5. An infrared sensor or an absolute humidity sensor as a means for detecting humidity is provided on the indoor side and the outdoor side of the air supply / exhaust unit, and the air supply / exhaust device is moved or stopped depending on the difference in humidity between the indoor and outdoor. The air supply / exhaust device according to Item 1. 6. The air supply / exhaust device according to claim 4, wherein the means for detecting the humidity is configured to heat an infrared ray generating portion and an infrared ray detecting portion disposed on the indoor side or the outdoor side of the air supply / exhaust portion. 7. A structure in which, as a means for detecting humidity, an infrared ray generating portion and an infrared ray detecting portion disposed on the indoor side or the outdoor side of the air supply / exhaust portion are coated with a water-repellent resin having a high infrared ray transmitting performance. The air supply / exhaust device according to claim 4. 8. As a means for detecting humidity, an infrared ray generating portion and an infrared ray detecting portion disposed on the indoor side or the outdoor side of the air supply / exhaust device are coated with a water-repellent resin having a high infrared ray transmitting performance. The air supply / exhaust device according to claim 4, which is made of a fluororesin. 9. A means for setting a wavelength range of infrared rays,
The air supply / exhaust device according to claim 3, wherein a prism, a grating, and a beam splitter for decomposing a wavelength region are arranged between the infrared ray generating portion and the infrared ray detecting portion of the infrared ray sensor. 10. An infrared detection range for detecting humidity is 2.
The air supply / exhaust device according to claim 4, wherein the air supply / exhaust device is configured to be set to 7 μm to 4.2 μm and configured to detect infrared transmittance or transmittance in a constant wavelength region by converting it into absorbance. 11. A structure for detecting a carbon dioxide concentration by setting an infrared detection range for detecting carbon dioxide to 5.0 μm to 5.6 μm and converting an infrared transmittance or a transmittance in a constant wavelength region into an absorbance. The air supply / exhaust device according to claim 2. 12. An infrared ray detection range for detecting carbon monoxide is set to 6.0 μm to 6.3 μm, and an infrared transmittance or a transmittance in a constant wavelength region is converted into an absorbance to detect a carbon monoxide concentration. The air supply / exhaust device according to claim 2, which is configured to: 13. An infrared detection range for detecting humidity is 2.
10. The humidity and the carbon dioxide concentration are detected by arbitrarily controlling either or both of the constant wavelength regions of 7 μm to 4.2 μm and 5.0 μm to 5.6 μm.
Air supply / exhaust device described. 14. An alarm function for activating an air supply / exhaust device together with a display of a caution / warning or a lamp from the air supply / exhaust device depending on the carbon monoxide concentration and the carbon dioxide gas concentration in the gas components in the room. 13. The air supply / exhaust device according to item 11 or 12.