JPH04250812A - Cleaner of indoor air - Google Patents

Abstract

PURPOSE:To detect the oxygen concentrations of the oxygen enriched air and the indoor air with one oxygen sensor or to directly inhale the oxygen enriched air in the cleaner of the indoor air being returned the oxygen enriched air with a pressure swing type gas separator into the room. CONSTITUTION:The cleaner is provided with a oxygen enriching part having the pressure swing type gas separator absorbing moisture a nitrogen gas and a carbon dioxide gas, etc., from the indoor air and an air cleaning part mixing the cleaned indoor air with the oxygen enriched air obtained with the previous gas separator and being returned into the room, a discharge port 23 connected with the exit part of the prescribed gas separator and communicating into the room, and a chamber 21 provided with an oxygen sensor 22. Also the oxygen sensor can detect display the oxygen concentrations of the oxygen enriched air and the indoor air in a proper time and the oxygen enriched air exiting from the prescribed gas separator can be directly inhaled with an inlet nozzle 19 and also the nozzle 19 is fixed attachably and detachably at the attaching position of the air returning path 6 to the indoor.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor air purification device for maintaining a constant oxygen concentration and creating a more comfortable environment by purifying indoor air.

0002

[Prior Art] Conventional indoor air purification devices use filters to adsorb dust, bacteria, smoke, etc. in the air, but they also absorb CO2 generated by the breathing action of humans and animals, CO generated by kerosene stoves, etc. Most of them were impossible to remove.

[0003] Furthermore, there has conventionally been an apparatus for increasing the oxygen concentration of indoor air using an oxygen enricher using an adsorbent, and this is shown in FIG. 3 and will be explained.

[0004] This device has an oxygen enrichment section and an air purification section,
In the oxygen enrichment section, part of the indoor air is pressurized from the suction port 1 through the filter 2 and the deodorizing filter 3 through the suction pipe 9 by the air blower 10, and the The adsorbent 14 in the adsorption tower 12 adsorbs nitrogen, carbon dioxide gas, carbon monoxide, sulfur dioxide gas, and water. The oxygen-enriched air is discharged from an outlet valve 17, passed through an oxygen-enriched air pipe 18, and then discharged into the room from a clean air path 6 and an exhaust port 7. On the other hand, adsorption tower 1
Gas and moisture adsorbed on the dehumidifying agent 13 and adsorbent 14 inside the dehumidifying agent 13 and adsorbent 14 are desorbed from the dehumidifying agent 13 and the adsorbent 14 by opening the switching valve 11 and operating the vacuum pump 15, and are released from the exhaust pipe 16 to the outside. is being discharged. As shown in FIG. 3, this adsorption tower 12 consists of two towers arranged in parallel, one for adsorption of the gas and moisture, and the other for the desorption of the gas and moisture, thereby continuously enriching oxygen. It's supposed to get some evaporative air. On the other hand, in the air purifying section, the indoor air sucked through the suction port 1 is filtered through a charged corrugate filter 2 and a deodorizing filter 3 to reduce tobacco smoke, bacteria, mold, dust, odor, etc. The air is mixed with oxygen-enriched air and discharged into the room from the outlet 7. These devices are configured so that the oxygen concentration in the room is detected by an O2 sensor 8 installed around the device, and the oxygen enrichment section operates when the oxygen concentration is 19% or less and stops when the oxygen concentration is 24% or more. Always maintains a constant indoor oxygen concentration.

[0005]

Problems to be Solved by the Invention The device shown in FIG. 3 using the conventional oxygen enricher described above is
At this time, the air purifying section operates all the time, but the oxygen enriching section repeats oxygen enriching operation and stopping depending on the oxygen concentration in the room.

[0006] These oxygen enrichment units sample the oxygen several times at intervals of several seconds using an O2 sensor 8 installed around the equipment, then take a moving average value and operate/stop the oxygen concentration based on this concentration value. The device is configured to display the oxygen concentration on a device display section (not shown).

[0007] Furthermore, the oxygen concentration at the outlet of the oxygen enrichment section is 40%.
As shown in FIG. Afterwards, or when there is a problem with the respiratory system, a person can directly inhale oxygen-enriched air with an oxygen concentration of about 40% through the inhalation nozzle 19, and use it to remove accumulated fatigue and as a backup when heart function declines. You can also do it. At this time, a mechanism (not shown) must also be provided to stop the oxygen-enriched air sent from the oxygen-enriched air pipe 18 to the clean air path 6 and send it to the suction nozzle 19 side. Furthermore, it is unclear whether the oxygen enrichment section is functioning normally and exhausting oxygen-enriched air, and the exact concentration of oxygen being discharged cannot be known.

In order to know the concentration of oxygen discharged from the suction nozzle 19, it is necessary to additionally install a very expensive oxygen sensor in the oxygen-enriched air pipe 18, which also increases the cost of the product. It had become.

The present invention aims to provide an indoor air purification device that can solve the above problems.

0010

[Means for Solving the Problems] The indoor air purifying device of the present invention solves the above-mentioned problems, and takes the following measures.

1. A pressure swing type gas separation device that adsorbs harmful components such as moisture, nitrogen and carbon dioxide, a means for introducing air from the room into the same pressure swing type gas separation device through a filter, and a pressure swing type gas separation device that uses the same pressure swing type gas separation device. an oxygen enrichment section comprising means for discharging the adsorbed components to the outside; mixing the remaining oxygen-enriched air obtained from the pressure swing gas separation device with the air stream purified from indoor air; and a chamber connected to the outlet of the pressure swing type gas separation device and equipped with an exhaust port communicating with the room and an O2 sensor.

2. In the above invention, the O2 sensor in the chamber detects the oxygen concentration at intervals of one second or several seconds, and displays the average value of several times as the oxygen concentration of the oxygen-enriched air discharged from the oxygen enrichment section. , When the oxygen enrichment section is stopped for 1 minute or several tens of seconds at 30 minute intervals or tens of minutes intervals, the oxygen concentration is detected at one second intervals or several seconds intervals after 30 seconds or tens of seconds, and the average value of several times is detected. is now displayed as the oxygen concentration of indoor air.

3. In the invention of 1 or 2 above, the oxygen enrichment section is operated when the detected value of the oxygen concentration of the indoor air is below a certain low value, and when the detected value of the oxygen concentration of the indoor air is a certain high value. It is configured to stop when .

4. In the above-mentioned invention 1, the suction nozzle provided at the tip outlet of the oxygen-enriched air pipe of the oxygen-enriching section can be detachably attached to the mounting seat provided in the air circulation path of the air-cleaning section. I made it.

[0015]

[Operation] In the present invention as described in 1 above, by connecting the outlet of the pressure swing type gas separation device to a chamber equipped with an exhaust port communicating with the room and an O2 sensor, when the oxygen enrichment section is in operation, The oxygen-enriched air obtained by the oxygen-enriching section flows into the chamber, and the inside of the chamber becomes an oxygen-enriched air atmosphere. As a result, while the oxygen enrichment section is in operation, the oxygen concentration is continuously detected, and the oxygen concentration discharged from the oxygen enrichment section is detected. On the other hand, when the oxygen enrichment section stops, the flow of oxygen-enriched air stops, and the atmosphere inside the chamber quickly becomes indoor air due to the diffusion effect from the exhaust port communicating with the room, so O2
The sensor detects the oxygen concentration, and the indoor oxygen concentration is detected. At this time, the detected value obtained can be used for controlling the oxygen enrichment section.

In the second aspect of the present invention, the oxygen concentration of the oxygen-enriched air discharged from the oxygen-enriching section is lower than the O2 in the chamber.
The oxygen concentration in the room air is accurately detected and displayed by the sensor, and the oxygen concentration in the room air is detected and displayed by the O2 sensor in the chamber by stopping the oxygen enrichment section for a short period when the indoor oxygen concentration does not fluctuate. As a result, one O2 sensor can accurately detect the oxygen concentration of the oxygen-enriched air discharged from the oxygen-enriching section and the indoor air.

[0017] According to the third aspect of the present invention, in the first or second aspect of the present invention, when the oxygen concentration of the indoor air decreases to a certain value or less, the oxygen enrichment section is operated to supply oxygen-enriched air to the indoor room. Furthermore, when the oxygen concentration of the indoor air increases and reaches a certain value, the oxygen enrichment section is stopped, and the oxygen concentration of the indoor air is maintained within an appropriate range.

In the fourth aspect of the present invention, in the first aspect of the present invention, the oxygen air obtained in the oxygen enrichment section is supplied to the suction nozzle, and a person can inhale the air with a high oxygen concentration. At this time, the oxygen concentration in the air supplied to the suction nozzle is detected by the O2 sensor in the chamber, as described above, and it can be determined whether the oxygen enrichment section is functioning normally. Further, by attaching the suction nozzle to the mounting seat of the air circulation passage of the air cleaning section, the oxygen-enriched air obtained in the oxygen enrichment section is supplied into the room.

[0019]

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention, and FIG. 2 shows changes in indoor oxygen concentration in the same embodiment together with sampling timing. This embodiment includes an air cleaning section that circulates indoor air by passing it through a filter, etc., and an oxygen enrichment section that uses a pressure swing type gas separation device.

The air purifying section uses a blower 5 to draw in indoor air that has passed through a charged corrugate filter 2 and a deodorizing filter 3 attached to an indoor air intake port 1 through a circulating air path 4, thereby converting the air into clean air. Oxygen-enriched air, which will be described later, is mixed into the circulation air path 6, and the purified air with a high oxygen concentration is discharged into the room from the exhaust port 7. This air purification function removes tobacco smoke, bacteria, mold, dust, odors, etc. from the indoor air by filter 2 and deodorizing filter 3, regardless of whether oxygen-enriched air is mixed in when the operation switch is turned on. While removing these substances, indoor air is circulated and purified.

On the other hand, the oxygen enrichment section includes a filter 2 attached to the suction port 1 through the suction pipe 9 connected to the circulating air path 4.
The indoor air purified by the deodorizing filter 3 is pressurized by the air blower 10 and passed through the electromagnetic switching valve 11 to the dehumidifier 13.
and adsorbents (usually zeolite catalysts are used)
The dehumidifying agent 13 is filled with moisture, and the adsorbent 14 is filled with nitrogen, carbon dioxide, and
Carbon monoxide and sulfur dioxide gas are adsorbed, and air enriched with oxygen, which is difficult to adsorb, (oxygen-enriched air) is separated and discharged by opening the outlet valve 17. An oxygen enriched air pipe 18 is connected to the outlet valve 17.
A suction nozzle 19 is provided at the tip of the outlet 8, and the suction nozzle 19 can be detachably attached to a mounting seat 24 provided in the circulation air passage 6. When the suction nozzle 19 is attached to the mounting seat 24, the oxygen-enriched air obtained in the adsorption tower 12 is passed from the oxygen-enriched air pipe 18 through the suction nozzle 19 attached to the mounting seat 24, and becomes recirculated air. Cleaned and oxygen-enriched indoor air is sent into the room from the outlet 7. Also,
The gas adsorbed by the dehumidifying agent 13 and adsorbent 14 in the adsorption tower 12 is desorbed from the dehumidifying agent 13 and adsorbent 14 by opening the switching valve 11 and operating the vacuum pump to reduce the pressure inside the adsorption tower 12. and is discharged outside from the exhaust pipe 16. In the adsorption tower 12, two towers are arranged in parallel as in the case shown in FIG. 3, and oxygen-enriched air can be obtained continuously by performing adsorption and desorption alternately as described above. ing.

The operation of this oxygen enrichment section is performed based on the oxygen concentration of indoor air, and in order to detect the oxygen concentration, a branch pipe 20 is connected to the oxygen enriched air pipe 18 at the outlet of the adsorption tower 12. A chamber 21 equipped with an exhaust port 23 and an O2 sensor 22 communicating with the room is connected to the branch pipe 20, and oxygen-enriched air is sent into the chamber 21.

The detection of oxygen concentration by this O2 sensor 22 has two functions, which will be explained as follows.
The first is to detect the oxygen concentration generated from the oxygen enrichment section, and when the oxygen enrichment section is in operation, oxygen enriched air is flowing through the oxygen enriched air pipe 18, so it is sent to the branch pipe 20. Oxygen-enriched air also flows into the chamber 21, creating an atmosphere of oxygen-enriched air inside the chamber 21, and excess air is exhausted from the exhaust port 23. In this state, the O2 sensor 22 performs sampling multiple times at intervals of several seconds or at intervals of one second, and displays the moving average value on the device display section (not shown) as the oxygen concentration generated by the oxygen enrichment section.

The second function is to detect the indoor oxygen concentration, and the oxygen enrichment section is stopped at regular intervals (sampling is performed at 30 minute intervals in the case of this device) or the electromagnetic switching valve 11 is stopped for 1 minute. By closing the oxygen enriched air tube 18
Stop exhausting oxygen-enriched air to. At this time of stop, oxygen gas in the oxygen-enriched air in the chamber 21 is quickly exhausted from the exhaust port 23 due to the diffusion effect, so that the oxygen concentration in the chamber 21 becomes the same as that of the indoor air. Since these diffusions complete in about 30 seconds, measurement of oxygen concentration is started after 30 seconds, and the average value obtained by sampling multiple times at 1-second intervals (sampling 8 times in the case of this device) is calculated as oxygen enrichment. It is used for controlling the unit and is displayed on the device display unit as the indoor oxygen concentration. This display value remains displayed until the next detected value is displayed.

[0025] The oxygen enrichment section is configured to operate and stop based on this detected value, and operates when the indoor oxygen concentration is 21% or less.
It is configured to stop at 22% or higher.

Changes in the indoor oxygen concentration over time in this example are shown in FIG. 2 and will be explained. The O2 sensor 22 detects the indoor oxygen concentration from the time when the operation switch of the gas separation device of this embodiment is turned ON, and in FIG. The unit operates, and the oxygen concentration in the room gradually rises. 0.5
After the time has elapsed, the oxygen enrichment section is stopped for one minute, and since the sampled value is approximately 21.5%, this value is displayed on the display section as the indoor oxygen concentration, and the operation is restarted. This stop time is 1
Since the time is very short (minutes), no decrease in the indoor oxygen concentration is observed. Furthermore, since the sampled value after 1 hour was less than 22%, the operation was continued. In this way, during continuous operation of the oxygen enrichment section, the oxygen concentration in the chamber 21 is
2 It is continuously detected by the sensor 22 and displayed on the display section of the device as the concentration of oxygen discharged from the oxygen enrichment section.

However, since the sampling value obtained by stopping for 1 minute after 2 hours has passed is approximately 22%, the oxygen enrichment section remains stopped by the control function, and the O2
The sensor 22 continuously samples the oxygen concentration of the indoor air as described above. At this time,
Because the oxygen enrichment section is stopped, the indoor oxygen concentration drops relatively quickly (30 minutes in the case of this device), and operation resumes when the continuously sampled oxygen concentration falls below 21%. do. In the case of Figure 2, the oxygen concentration in the room fell below 21% after 30 minutes had passed, so the operation of the oxygen enrichment unit was restarted, and the harmful components of the indoor air were removed to the outside, and the oxygen concentration in the room air was increased. We will continue to increase this. The above operations are repeated to keep the oxygen concentration in the room constant and create a comfortable indoor environment.

Next, when a person directly inhales oxygen-enriched air after playing sports or using their head, the inhalation nozzle 19 attached to the mounting seat 24 is manually removed and By being close to the air, oxygen-enriched air can be directly inhaled. At this time, the oxygen concentration flowing through the oxygen-enriched air pipe 18 is determined by detecting the oxygen concentration of the oxygen-enriched air flowing into the chamber 21 from the branch pipe 20 with the O2 sensor 22, and is always displayed on the display. , people can breathe in oxygen-enriched air with peace of mind while looking at this number.

[0029]

As explained above, the present invention as claimed in claim 1 provides control of the oxygen enrichment section by connecting a chamber equipped with an exhaust port and an O2 sensor to the outlet section of the pressure swing type gas separation device. It is now possible to perform two types of detection with a single O2 sensor: the detection of the indoor oxygen concentration necessary for this purpose, and the detection of the oxygen concentration discharged from the oxygen enrichment section. This allows the use of only one O2 sensor, which is very expensive, and reduces product costs. Further, in order to detect the oxygen concentration, it is only necessary to add a short and small chamber, and this can be easily installed, and an increase in the number of equipment can be avoided.

[0030] In addition to the effects of the present invention as claimed in claim 1, the present invention as claimed in claim 2 can measure the oxygen concentration of the oxygen-enriched air generated in the oxygen enrichment section and the oxygen concentration of indoor air using one O2 sensor. By being able to detect accurately, the operation of the oxygen enrichment unit can be controlled, the oxygen concentration of indoor air can be kept constant, and a comfortable indoor environment can be maintained.

[0031] In the present invention as claimed in claim 3, in addition to the effects of the present invention as claimed in claim 1 or 2, by controlling the operation of the oxygen enrichment section based on the detected value of the oxygen concentration of the indoor air, the oxygen concentration of the indoor air is reduced. Concentration can be kept constant.

[0032] In addition to the effects of the present invention as claimed in claim 1, the present invention as claimed in claim 4 makes it possible to easily remove the suction nozzle from the air recirculation path of the air purifying section, and to remove oxygen-enriched air using the O2 sensor. By detecting the concentration of the oxygen-enriched air, the oxygen-enriched air discharged from the oxygen-enriched section can be safely inhaled.

[Brief explanation of the drawing]

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

FIG. 2 is a graph showing the relationship between changes in indoor oxygen concentration and sampling timing in the same example.

FIG. 3 is a configuration diagram of a conventional indoor air purification device.

[Explanation of symbols]

1 Suction port 2 Filter 3. Deodorizing filter 4 Circulating air path 5. Blower 6 Return air path 7 Discharge port 8 O2 sensor 9 Intake pipe 10 Air blower 11　Switching valve 12 Adsorption tower 13　Dehumidifier 14 Adsorbent 15 Vacuum pump 16 Exhaust pipe 17 Outlet valve 18 Oxygen enriched air pipe 19 Suction nozzle 20 Branch pipe 21 Chamber 22 O2 sensor 23 Exhaust port 24 Mounting seat

Claims (4)

[Claims] Claim 1: A pressure swing type gas separation device for adsorbing harmful components such as moisture, nitrogen, and carbon dioxide, means for introducing air from a room into the same pressure swing type gas separation device through a filter, and the same pressure swing type gas separation device. an oxygen enrichment unit equipped with a means for discharging the components adsorbed by the gas separation device to the outside; an air purifying section that mixes with the flow of the gas and circulates it; and a chamber that is connected to the outlet section of the pressure swing type gas separation device and that is provided with an exhaust port that communicates with the interior of the room and an O2 sensor. Indoor air purification device. 2. The O2 sensor in the chamber detects the oxygen concentration at intervals of one second or several seconds, and displays the average value of several times as the oxygen concentration of the oxygen-enriched air discharged from the oxygen enrichment section, When the oxygen enrichment section is stopped for 1 minute or several tens of seconds at intervals of 30 minutes or tens of minutes, the oxygen concentration is detected at intervals of one second or several seconds after 30 seconds or tens of seconds, and the average value of several times is calculated. 2. The indoor air purification device according to claim 1, wherein the indoor air purification device displays the oxygen concentration of the indoor air. 3. The oxygen enrichment section of the gas separation device is operated when the detected value of the oxygen concentration of the indoor air is below a certain low value, 3. The indoor air purification device according to claim 1, wherein the indoor air purification device is configured to stop when a certain high value is reached. 4. A suction nozzle provided at the tip outlet of the oxygen-enriched air pipe of the oxygen-enriching section can be detachably attached to a mounting seat provided in the air circulation path of the air purifying section. The indoor air purification device according to claim 1, characterized in that: