JPH05133598A - Atmospheric air intake device - Google Patents

Abstract

PURPOSE:To vary an air flow rate to be passed through a filter for removing contaminant substances in response to a contaminated state in the atmosphere. CONSTITUTION:Sensors 3a, 3b, 3c for sensing concentrations of SOX, NOX, CO of contaminant substances in the atmosphere are provided between an intake louver 1 to become an atmosphere inlet and a prefilter 2. Ducts 4a-4d are formed in parallel at a downstream of the prefilter 2. Motor dampers 5a-5d are mounted in inlets of the ducts. Filters 6a-6c for filtering SOX, NOX, CO are mounted in the ducts 4a-4c. A controller 7 for regulating openings of the dampers according to signals of the concentrations sensed by the sensors is provided. The dampers are opened to the openings responsive to the sensed concentrations in the ducts of the filters by the controller 7 and the dampers of the ducts having the filters are opened when all of the contaminant substances are not detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air intake device which is installed at an intake of outside air and introduces the outside air into an air conditioner while removing contaminants.

[0002]

2. Description of the Related Art Normally, the air introduced into an air conditioner is taken in from the outside, but in large cities in recent years, the outside air is considerably polluted by the exhaust gas of vehicles and soot. However, conventionally, only a filter for removing dust in the outside air is provided at the intake of the outside air, etc., and SO _X , NO _x , CO, which are pollutants in the outside air, or CO having a concentration exceeding the reference value. ₂ has not been removed. Therefore, in buildings near soot and smoke generating facilities and roads with heavy traffic, the above-mentioned pollutants are contained in the outside air taken in through the intake, and the outside air containing such harmful substances is introduced into the air conditioner. is the current situation.

[0003]

In order to remove pollutants from the outside air, a method of installing a filter for filtering each pollutant in the air passage connecting the outside air intake and the air inlet of the air conditioner is considered. Be done. However, the pollution state of the outside air taken in changes depending on the time of day and the weather, so
For example, even when the outside air is hardly polluted, it goes through the filter toward the air inlet of the air conditioner. In particular, the filter for removing each of the contaminants,
Since the main thing that causes a chemical change in the filter,
The degree of wear of the filter is large corresponding to the amount of air passed,
The unnecessary ventilation of the filter has the disadvantage of wasting a lot of maintenance costs.

The present invention is intended to solve such a problem. By changing the amount of air passing through the filter according to the state of contamination in the outside air to be taken in, the maintenance cost of the filter can be kept low and the outside air can be kept low. It is an object of the present invention to provide an outside air intake device capable of removing contaminants therein.

[0005]

In order to achieve the above object, an outside air intake device according to a first aspect of the invention is provided in parallel with a sensor for detecting contaminants in the outside air by a type and a downstream side of the sensor. A plurality of air passages, filters that are individually arranged in each air passage to filter different kinds of pollutants, an opening / closing member that opens and closes each air passage, and an intervening member between the sensor and the opening / closing member. And a control device for opening an air passage having a filter for filtering contaminants of the same type as those detected by the sensor and closing an air passage having another filter.

Further, an outside air intake device described below, which has the same industrial field of use and problem to be solved as the above outside air intake device, is provided by claims 2 to 4. A sensor that detects the concentration of pollutants in the outside air by type, a plurality of air passages provided in parallel downstream of this sensor, and a pollutant of different types that are individually arranged in each air passage. An air passage having filters, an opening / closing member that adjusts the opening of each air passage, and a filter that is interposed between the sensor and the opening / closing member to filter the same kind of contaminant as that detected by the sensor. 3. The outside air intake device according to claim 2, further comprising: a control device for opening the air passage corresponding to the detected concentration and closing the air passage having another filter.

In the two outside air intake devices, another air passage without a filter is provided in parallel with each air passage provided with a filter, and an opening / closing member for opening and closing the air passage is provided in the other air passage. The outside air intake device according to claim 3, wherein the control device is set so that only the opening / closing member of the another air passage is opened when the sensor does not detect a contaminant.

A sensor for detecting pollutants in the outside air, two air passages provided in parallel on the downstream side of the sensor, and a pollutant which is arranged in any one of the air passages and detected by the sensor. A filter for filtering, an opening / closing member for opening / closing each of the air passages, and being interposed between the sensor and the opening / closing member, when the sensor detects a contaminant, only the air passage in which the filter is arranged is opened, The outside air intake device according to claim 4, further comprising a control device that opens only an air passage in which a filter is not arranged when the sensor does not detect a contaminant.

[0009]

In the outside air intake device according to claim 1, when the outside air passes through the sensor, the sensor detects a pollutant of a type that can be detected in the outside air, and a signal indicating the detected state of the pollutant is sent to the control device. Be done. Then, when the pollutant is detected, the control device sends a signal for opening the open / close member arranged in the air passage having a filter for filtering the pollutant of the type detected by the sensor, and outputs another signal. A signal for closing the opening / closing member arranged in the air passage having a filter for filtering the pollutant is sent. As a result, the outside air is introduced into the air passage having the filter for filtering the pollutant of the type detected by the sensor, and the filter removes the pollutant of the type detected by the sensor from the outside air. No outside air is introduced into the air duct with a filter that filters out contaminants of a different type than those detected by the sensor.

In the outside air intake device according to the second aspect, when the outside air passes through the sensor, the sensor detects the concentration of a pollutant of a detectable type, and a signal of the detected concentration is sent to the control device. When the pollutant is detected, the control device opens the open / close member corresponding to the detected concentration of the opening / closing member arranged in the air passage having the filter for filtering the pollutant of the type detected by the sensor. A signal to open each time is sent, and a signal to close the opening / closing member arranged in the air passage having a filter for filtering another kind of pollutant is sent. As a result, the outside air is introduced into the air passage with a filter that filters contaminants of the type detected by the sensor, and only the air volume corresponding to the concentration of that substance in the outside air is introduced, and the contaminants of the type detected by the sensor are detected by the filter. Removed from the atmosphere.
No outside air is introduced into the air duct with a filter that filters out contaminants of a different type than those detected by the sensor.

In the outside air intake device according to the above claims 1 and 2, when the signal sent to the control device does not detect a pollutant of a detectable type, the control device turns on the filter. An open / close signal is sent to the opening / closing member arranged in the air passage not provided, and a closing signal is sent to the opening / closing member arranged in the air passage provided with the filter. As a result, when the outside air does not contain a pollutant of a type that can be detected by the sensor, the outside air is introduced only into the air passage having no filter.

In the outside air intake device of the fourth aspect, when the outside air passes through the sensor, the sensor detects a pollutant that can be detected, and a signal of the detection state of the pollutant in the outside air is sent to the control device. Then, when the pollutant is detected, the control device sends a signal to open the opening / closing member arranged in the air passage with the filter, to the opening / closing member arranged in the air passage without the filter. Sends a signal to close it. As a result, the outside air is introduced into the air passage having the filter, and the contaminants detected by the sensor are removed from the outside air by the filter. When the pollutant is not detected, the control device sends a signal to close the opening / closing member arranged in the air passage with the filter, and sends the closing signal to the opening / closing member arranged in the air passage without the filter. Send a signal to open. As a result, the outside air is introduced into the air passage without the filter, and is not introduced into the air passage with the filter.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram for explaining an embodiment of the present invention. A prefilter 2 for removing dust is attached to the downstream side of the intake gallery 1 that takes in the outside air into the air passage 11 of the outside air intake device, and a prefilter 2 for removing dust is installed between the intake gallery 1 and the prefilter 2. sensor 3a for detecting the concentration of SO _X of contaminants, sensor 3 for detecting the concentration of the NO _X
A sensor 3c for detecting the b and CO concentrations is installed. Further, the air passage 11 is divided into four in parallel on the further downstream side of the pre-filter 2, and the air passages 4a, 4b,
4c and 4d are formed.

Motor dampers 5a, 5b, 5c and 5d for opening and closing the air passages are attached to the inlets of the air passages. Each motor damper is capable of electrically adjusting the opening of the damper steplessly. Then, the air passage 4a has a filter 6a for filtering SO _X detected by the sensor 3a, the air passage 4b has a filter 6b for filtering NO _X detected by the sensor 3b, and the air passage 4c has a sensor 3c for detecting. Filters 6c for filtering CO are attached respectively. No filter is attached to the air passage 4d.

The air passage 11 joins the air passages on the downstream side of these air passages. In this outside air intake device, for example, the air intake of an air conditioner is connected to the most downstream of the air passage 11. Used. A control device 7 that adjusts the opening of each motor damper by a signal from each sensor is installed outside the wind passage 11. The controller 7 and the sensors and the motors of the motor dampers are connected by wiring.

The control device 7, when the sensor 3a detects the concentration of SO _X is open motor-damping 5a in the opening in proportion to the detected concentration, the detection when the sensor 3b detects the concentration of the NO _X The motor damper 5b opens at an opening proportional to the concentration, and when the sensor 3c detects the concentration of CO, the motor damper 5c opens at an opening proportional to the detected concentration. In either case, a filter for contaminants not detected The motor damper in the air passage provided with is closed, and when no contaminant is detected, only the motor damper 5d is set to open.

An air intake (not shown) of an air conditioner is connected to the most downstream of the air passage 11, and outside air is introduced into the air passage 11 from the intake gallery 1 when the air conditioner is started. When the outside air passes through the sensor installation position, each sensor detects the concentration of the corresponding pollutant and sends the detected concentration signal to the control device 7. The control device 7 determines the opening degree of each corresponding motor damper based on the signal from each sensor and sends the signal to each motor damper.

As a result, the openings of the motor dampers 5a, 5b, and 5c provided with the filters have a size proportional to the detected concentration of each pollutant. Therefore, the outside air is distributed and introduced into each air passage, passes through each filter, merges, and then heads to the air intake port of the air conditioner. When neither pollutant is detected by each sensor, only the motor damper 5d is opened and the introduced outside air goes to the air intake port of the air conditioner without passing through the filter. When the outside air condition changes and the detected concentration of the pollutant by each sensor changes, the opening degree of each motor damper changes via the control device 7, and the amount of air distributed to each air passage changes.

As a result, the outside air having an air volume proportional to the concentration of each pollutant is passed through each filter, and when the pollutant is not included, the outside air is not passed through the filter, so that unnecessary ventilation to the filter is suppressed. Therefore, the degree of wear of the filter can be reduced. The control conditions of the control device 7 are
If each motor damper is set to open or close to a certain opening depending on whether or not the sensor detects contaminants, all air passages with filters for contaminants detected by each sensor are opened, and undetected contaminants The air duct with the filter for is closed. And the air passage 4 without a filter
d opens if no contaminant is detected.

In the above embodiment, all the air passages provided may be provided with filters for filtering contaminants. The number of air passages is increased or decreased according to the number of installed filters. Depending on the installation location of the outside air intake device, one type of filter may be sufficient. An example in that case is shown in FIG. A sensor 3a for detecting SO _X is installed between the intake gallery 1 and the prefilter 2. Two air passages 4a and 4d are formed on the downstream side of the pre-filter 2, and motor dampers 5a and 5d are attached to the inlets of the respective air passages. A filter 6a for filtering SO _X is attached to the air passage 4a. The sensor 3a and the motor of each motor damper are connected by wiring via the control device 7.

By setting the control device 7, the sensor 3
When a detects SO _X , only the motor damper 5a is opened to direct the outside air to the air passage 5a having the filter 6a. When not detected, only the motor damper 5d is opened to direct the outside air to the air passage 5d having no filter. Thereby, unnecessary ventilation to the filter is suppressed. The outside air intake device of this embodiment is for removing SO _X , but if a sensor and a filter are selected according to the pollutant that needs to be removed and installed at a predetermined position, it can cope with each pollutant. ..

In each of the above embodiments, the motor damper for opening and closing each air passage is provided at the inlet of the air passage, but it may be provided at the outlet. The opening / closing member that can be used in the present invention is not limited to the motor damper.

[0023]

As described above, in the outside air intake device of the present invention, the amount of air introduced into each air passage is adjusted by detecting the pollutants in the outside air by the sensor.
Unnecessary ventilation to the filter is suppressed. As a result, especially in buildings near soot and smoke generating facilities and roads with heavy traffic, connecting this outside air intake device to an air intake such as an air conditioner reduces the maintenance cost of the filter and reduces the There is an effect that clean air from which pollutants are removed can be introduced into an air conditioner or the like.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an embodiment of the present invention.

[Explanation of symbols]

 3a-3c sensor 4a-4d air passage 5a-5d motor damper (opening / closing member) 6a-6c filter 7 control device

Claims (4)

[Claims] 1. A sensor for detecting pollutants in the outside air by type, a plurality of air passages provided in parallel on the downstream side of the sensor, and pollutants of different types which are individually arranged in each air passage. An air passage having a filter for filtering the air, an opening / closing member for opening / closing each of the air passages, and a filter interposed between the sensor and the opening / closing member for filtering the same kind of contaminant as that detected by the sensor. And a control device for opening the air passage and closing the air passage with another filter. 2. A sensor for detecting the concentration of pollutants in the outside air by type, a plurality of air passages provided in parallel downstream of the sensor, and a plurality of air passages individually arranged in each air passage and different in type from each other. Each filter that filters contaminants, an opening / closing member that adjusts the opening of each air passage, and a contaminant that is of the same type as that detected by the sensor interposed between the sensor and the opening / closing member A controller for opening an air passage having a filter corresponding to the detected concentration and closing an air passage having another filter. 3. In parallel with each of the air passages provided with a filter,
In addition to providing another air passage without a filter, an opening / closing member for opening and closing the air passage is provided in the other air passage, and when the sensor does not detect a contaminant, only the opening / closing member of the other air passage is opened. The outside air intake device according to claim 1 or 2, wherein a control device is set. 4. A sensor for detecting contaminants in the outside air,
Two air passages provided in parallel on the downstream side of this sensor,
A filter arranged in any one of the air passages for filtering contaminants detected by the sensor, an opening / closing member for opening / closing the air passages, and a filter interposed between the sensor and the opening / closing member, A control device that opens only the air passage in which the filter is arranged when the sensor detects the pollutant, and opens only the air passage in which the filter is not arranged when the sensor does not detect the contaminant. Intake device.