JP2000185215A - Method for measuring amount of voltage harmful chemical substance adsorbed in adsorbing material and air cleaner for removing volatile harmful chemical substance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect correctly an adsorbed state of an adsorbing material for removing volatile harmful chemical substance, its performance, life and the like. SOLUTION: An air cleaner is constituted wherein an adsorbing material 95 for removing volatile harmful chemical substance is provided. The adsorbing material 95 is arranged in a draft route 92. Further, a VOC sensor 90 is provided in the draft route 92. The VOC sensor 90 uses a part of the adsorbing material 95 as a sample piece 90, and contains a heater 97 for desorbing the volatile harmful chemical substance adsorbed in the sample piece 96. When the sample piece 96 is heated by the heater 97, the adsorbed volatile harmful chemical substance is desorbed, and the adsorbed substance is precisely detected by a detector 98. Such the detected result is utilized by a control circuit 100, and a exchange time for the adsorbing material 95 and its regenerating period are displayed on a display 91.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for cleaning volatile toxic chemicals. In particular, the present invention relates to an air purifying apparatus capable of purifying air in a closed space used by a patient with chemical sensitivity, etc., and sufficiently reducing the concentration of volatile harmful chemicals in the closed space.

[0002]

2. Description of the Related Art In a living environment, indoor and outdoor air pollution has progressed, and various countermeasures have been promoted. For example, with respect to formaldehyde emitted from building materials, a material with a low content has been developed. With regard to the problem of NO _X contained in the exhaust gas of an automobile, reduction of the emission concentration is addressed.

[0003] It is necessary to measure how the air pollution in the living environment has been improved by taking these various measures. As a conventional method of measuring the state of contamination, a highly accurate analysis method such as gas chromatography is used. However, such an analysis method is
There is a problem that sampling is difficult and the size of the analyzer is large, so that it is difficult to measure the state of contamination in various places.

Therefore, in recent years, a simple measuring instrument that can easily measure the pollution status and the like of a built living space at a house construction site or the like has been marketed. However, such a simple measuring instrument has a problem that the detection accuracy in a low concentration range is poor, and there is a problem that sensitivity is deteriorated due to a noise gas, and it is difficult to correctly measure a contamination state of a living space or the like.

[0005] On the other hand, an increasing number of people are suffering from "chemical sensitivity" which complains of physical disorder due to chemical substances overflowing around them. "Chemical hypersensitivity" is difficult to define in a word, but for example, it can be described as "a disease that acquires hypersensitivity and reacts to extremely small amounts of chemicals and exhibits unpleasant symptoms". When healthy people are exposed to large amounts of chemicals, they become hypersensitive and may develop chemical sensitivity.

For patients with such chemical sensitivity,
Placing yourself in a space where the concentration of volatile harmful chemicals is sufficiently reduced is the only way to alleviate the symptoms. Therefore,
In order to form such a space, for example, an air purifier for removing volatile harmful chemical substances is used. In this type of air purifier, a gas removing material such as an adsorbent is used to reduce volatile harmful chemical substances contained in air. However, when the adsorbent adsorbs a gas, its performance deteriorates, and it becomes difficult to adsorb the gas further. Therefore, in order to effectively operate such an air purifying device, it is necessary to pay attention to the replacement or regeneration time of the adsorbent. As a method of determining the replacement time or the regeneration time of the adsorbent, a method of assuming a certain period of life and assuming a certain environment can be considered. However, in actuality, the life of the adsorbent greatly changes depending on the use environment. For this reason, it is considered that a method or an apparatus for measuring how much gas is adsorbed on the adsorbent is more desirable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and describes an adsorption state of an adsorbent for removing volatile harmful chemical substances.
It is an object of the present invention to provide a method for correctly detecting performance, life, and the like, and an air purifying apparatus employing the method.

[0008]

According to the first aspect of the present invention, there is provided an air passage through which air to be cleaned passes;
A volatile harmful chemical, comprising: an adsorbent for adsorbing volatile harmful chemicals disposed in a ventilation path; and a VOC sensor provided in the ventilation path for detecting volatile harmful chemicals. It is an air cleaning device for removing substances.

According to a second aspect of the present invention, in the air purifying apparatus according to the first aspect, the VOC sensor comprises an adsorbent for adsorbing volatile harmful chemicals, and a volatile adsorbent adsorbed on the adsorbent. It is characterized by including heating means for heating the adsorbent to desorb the harmful chemical substance, and a detector for detecting the amount of volatile harmful chemical substance desorbed from the adsorbent.

According to a third aspect of the present invention, in the air cleaning device according to the second aspect, a part of the adsorbent disposed in the ventilation path is used as an adsorbent of the VOC sensor. is there. The invention according to claim 4 is the air purifying apparatus according to any one of claims 2 to 3,
The air conditioner further includes means for integrating the air flow rate flowing through the ventilation passage, and means for outputting the performance or replacement time of the adsorbent based on the output of the integrating means and a VOC sensor.

According to a fifth aspect of the present invention, there is provided a method for measuring the amount of a substance adsorbed on an adsorbent for adsorbing volatile harmful chemical substances disposed in an air passage through which air to be cleaned passes. A part of the adsorbent is used as a sample piece for analyzing the amount of adsorption, the sample piece is heated to desorb the adsorbed substance, and the amount of the desorbed substance is detected by a detector. This is a method of measuring the amount of volatile harmful chemical substances.

According to a sixth aspect of the present invention, the air flow rate flowing through the ventilation path is measured, and the degree of contamination of the air flowing into the ventilation path is determined based on the integrated value and the amount of the substance measured by the fifth aspect. It is a method of measuring. According to the configuration of the first aspect, the replacement time and the regeneration time of the adsorbent can be known based on the output of the VOC sensor. For this reason, there is no problem such as using the adsorbent whose performance has deteriorated without knowing it. In addition, it is possible to eliminate waste such as replacing the adsorbent whose performance has not deteriorated, and to provide an air purifying device with good use efficiency of the adsorbent.

According to the second aspect of the present invention, even if the amount of the volatile harmful chemical substance adsorbed on the adsorbent is very small, the trace amount of the chemical substance can be accurately detected. Or,
Even if the detector is a simple detector that detects a relatively large amount of volatile harmful chemicals, the amount of volatile harmful chemicals desorbed from the adsorbent is large, and such a detector was used. An inexpensive VOC sensor can be configured.

According to the third aspect of the invention, since a part of the adsorbent is used as the adsorbent of the VOC sensor, the adsorbent to be detected by the VOC sensor is an actual adsorbent, and the adsorbent adsorbing conditions The regeneration time or replacement time of the adsorbent can be accurately detected based on the deterioration conditions and the like. In particular, the thickness of the adsorbent and the thickness of the sample piece are equal, and the regeneration time and the number of times of the adsorbent can be accurately calculated.

According to the configuration of the fourth aspect, by integrating the air flow rate, simple measurement of the degree of contamination becomes possible, which helps the patient to objectively grasp the degree of contamination. Alternatively, it assists the patient in choosing the right adsorbent.
According to the configuration of the fifth aspect, the amount of the volatile harmful chemical substance adsorbed on the sample piece is detected, so that the performance of the adsorbent or the replacement time can be grasped.

According to the sixth aspect of the present invention, since the amount of the volatile harmful chemical substance and the air flow rate are measured, the degree of contamination of the air flowing through the ventilation path by the volatile harmful chemical substance can be grasped. In the selection of the adsorbent according to the conditions.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram showing the configuration of an air purifying apparatus for removing volatile harmful chemical substances according to an embodiment of the present invention. As shown in FIG. 1, the air purifying device includes:
An air passage 92 through which air to be cleaned passes is provided, and an airflow flowing in the air passage 92 is created by rotating a fan 93. This airflow passes through a filter 94 disposed in the ventilation passage 92 to remove dust. Further, volatile harmful chemical substances such as volatile harmful chemical substances are removed by passing through the adsorbent 95 disposed in the ventilation path 92.

The fan 93 may be a propeller fan or a sirocco fan, and its form can be freely determined. Also, the filter 94 is, for example, HEP
Any type may be selected according to the situation, such as the A type or the medium performance type. The adsorbent 95 can be, for example, activated carbon, zeolite, or the like, and may be any substance that physically adsorbs volatile harmful chemical substances.

The feature of this embodiment is that a VOC sensor 90 for detecting the amount of volatile harmful chemicals (volatile toxic chemicals) adsorbed on the adsorbent 95 is provided. The VOC sensor 90 uses a part of the adsorbent 95 as a sample piece 96 for analyzing the amount of adsorption. For this purpose, a heater 97 is provided for heating the sample piece 96 to desorb volatile harmful chemical substances adsorbed on the sample piece 96. Further, the sample piece 96
A detector 98 for detecting the amount of volatile harmful chemicals desorbed from the fuel cell is provided. The guide plate 99 for guiding the volatile harmful chemical substances desorbed from the sample piece 96 to the detector 98 so that the volatile harmful chemical substances desorbed from the sample piece 96 does not spread into the ventilation path 92. 92
Is located within.

Heater 97, detector 98 and fan 93
Is connected to the control circuit 100. Control circuit 100
Controls the driving of the air purifying device, in other words, the driving of the fan 93, and controls the VOC sensor 90,
The amount of the volatile harmful chemical substance adsorbed on the sample piece 96 is detected, and based on the detection output, the replacement time and the regeneration time of the adsorbent 95 are estimated as described later. The replacement time and the regeneration time estimated by the control circuit 100 are displayed on the display 91.

FIG. 2 is a flowchart showing the contents of the control operation executed by the control circuit 100 shown in FIG. The operation of the control circuit 100 will be described according to the flow of FIG. First, the control circuit 100 determines whether or not the inspection time of the adsorbent 95 (specifically, the sample piece 96) has come (step S1). For example, if one week (7 days) is set as the inspection interval, it is determined whether seven days have passed since the previous inspection, and if it is the seventh day, it is determined that the inspection time is reached. You.

In the case of the inspection time, first, the heater 97 is heated (step S2), and at the same time, the output of the detector 98 is read (step S3). During the inspection period, the fan 93 is rotated at a speed optimal for the inspection, for example, at a very low speed (step S4). Steps S2 to S5 are performed until a predetermined inspection time, for example, 30 seconds elapses.
Processing is continued.

After the elapse of the inspection time, the integrated value D _{0 of the} amount of volatile harmful chemicals, which is the result of the previous inspection detected up to the current inspection, is read out, and the integrated value D ₀ is used as the integrated value of the current inspection. the value D _N of in detected volatile hazardous chemical substance amount is added, it is a D 0 _{+ 1} (step S6). Further, after the end of the previous inspection, an air flow rate _AT that has passed through the ventilation passage 92 is calculated based on the total drive amount of the fan 93 up to the current inspection (step S7).

Then, the integrated value D obtained in step S6
_{0 + 1}Is a predetermined replacement time for the adsorbent 95.
Alternatively, a comparison is made with a reference value TH representing the regeneration time. The result
Fruit, D _{0 + 1}If ≧ TH, the adsorbent 95 is replaced or
It is determined that it is the birth date. Then, the display 91 shows the suction.
A message indicating that the material 95 should be replaced or regenerated is displayed.
Step S9).

On the other hand, in step S8, it is determined that the integrated value D _{0 + 1 of the} amount of the absorbed volatile harmful chemical substance is smaller than the reference value TH, and the adsorbent 95 has not reached the replacement time or the regeneration time. And the deterioration state based on the integrated value D _{0 + 1} is displayed. For example, a display such as changing some of the green bar-shaped display area to red or the like allows the adsorbent 9 to be displayed.
5 can be displayed (step S10).

Furthermore, based on the air flow rate A _T which is calculated in the present detected value D _N and step S7, contamination of the air flowing in the air passage 92 (the proportion of volatile toxic substances contained in air) It is calculated and displayed (step S11). The degree of air pollution is defined as "average concentration of volatile harmful chemical substances = integrated output value of detector / integrated air flow rate" (more precisely, because there is a change in the characteristics of the adsorbent with time, It is necessary to further add a parameter representing a change with time to the equation, but this equation can simply represent the degree of air pollution.)

The display of the degree of air pollution and the state of deterioration of the adsorbent has the following advantages. The indication of the degree of air pollution makes it possible to appeal the risk to patients and users. The indication of the state of deterioration of the adsorbent provides a guide for selecting an optimal adsorbent. For example, if the degree of air pollution decreases, it is conceivable to replace the adsorbent with a longer life even if the efficiency is slightly lower. Can be changed to
You can get that indication.

In the embodiment shown in FIG. 1, an example is shown in which a part of the adsorbent 95 is used as the sample piece 96. Instead of such a configuration, for example, a sample piece 101 may be provided separately from the adsorbent 95, and the sample piece 101 may be taken out and inspected as described below. FIG. 3 is an illustrative view showing a method of inspecting the sample piece 101 taken out of the air cleaning device. As shown in FIG.
1 is taken out and heated by a heater (for example, a hot plate 102 for a chemical experiment). The periphery of the sample piece 101 placed on the hot plate 102 is closed with a small container 103. In addition, a guide tube 104 is connected to the small container 103. A simple measuring device 105 for detecting the concentration of gaseous matter is connected to the other end of the guide tube 104. Hot plate 1
When the sample piece 101 is heated by the method 05, the volatile harmful chemical substance adsorbed on the sample piece 101 is desorbed from the sample piece 102, and the desorbed volatile harmful chemical substance passes through the guide tube 104 and becomes a simple measuring instrument. 105.
It is preferable that a suction fan is provided in the simple measuring instrument 105 so that the gas can be easily collected. As a result, the amount or concentration of the volatile harmful chemical substance detached from the sample piece 101 can be measured by the simple measuring device 105.

When the sample piece 101 is inspected using the sample piece 101 that has undergone the same history as the adsorbent 95 disposed in the ventilation path 92, the deterioration state of the sample piece 101 is determined by the adsorbent 95 disposed in the ventilation path 92. Since the state is close to the deteriorated state, more appropriate measurement can be performed when the replacement or regeneration time of the adsorbent 95 disposed in the ventilation path 92 is known. Therefore, the sample piece 101 heated for inspection should not be used again unless the adsorbent 101 disposed in the ventilation path 95 is heated and regenerated. Therefore, when a plurality of inspections are scheduled before the adsorbent 95 disposed in the ventilation path 92 is regenerated or replaced, it is preferable to provide a plurality of sample pieces 101 for the number of inspections.

The VOC sensor 9 described with reference to FIGS.
By using the configuration of FIG. 0, the inspection method, and the inspection method described with reference to FIG. 3, the amount of the volatile harmful chemical substance can be accurately detected by the detector 98. In addition, simple measuring instrument 1
05 also makes it possible to accurately measure the amount and concentration of volatile harmful chemical substances. This is because the sample pieces 96 and 101 to be detected are heated for detection, and the adsorbed volatile harmful chemical substances are desorbed.
If the time required for the sample pieces 96, 101 to adsorb volatile harmful chemicals is increased, the sample pieces 96, 101
1 and the amount of volatile harmful chemicals is relatively high. Therefore, the amount and concentration of the volatile harmful chemical substance can be accurately measured by the detector 98 and the simple measuring instrument 105.
In other words, the detector 9 in the embodiment described with reference to FIG.
8 may have a measurement accuracy of about 105 of the simple measuring instrument,
Even if the detector 98 having such measurement accuracy is used, it is possible to accurately measure volatile harmful chemical substances.

Next, a room for a patient with a chemical substance provided with an air purifier for removing volatile harmful chemical substances according to an embodiment of the present invention will be described. This room is a space where the chemical sensitive patients can evacuate with peace of mind, and is a place where they can give a sense of security that they will never get sick. It is a place where the symptoms can be quickly sedated when it is done.

FIG. 4 is a perspective view showing an outline of an example of a room for a chemical sensitive patient. The room 1 forms a closed space like a shelter installed in an existing living space (a so-called ordinary room) 2, and is made in a so-called "room-in-room" concept. Since a patient with chemical hypersensitivity develops even when touching a very small concentration of a chemical substance, it is necessary to keep the concentration of the chemical substance in the room 1 sufficiently low.

For this reason, the room 1 is mainly made of a material that generates little volatile harmful chemical substances. For example, it is made of a material that hardly emits a chemical substance such as inorganic metal, natural wood, ceramic, glass, or the like, or is made of a material whose surface is completely coated with a material that emits little chemical substance. Specifically, the room 1 has, for example, a rectangular parallelepiped shape, and each side is formed of a wooden frame not shown (for example, a wooden frame of solid natural wood such as cedar). Further, the room 1 has a closed space 9 surrounded by six surfaces of a floor surface 3, a front surface 4, a back surface 5, a left side surface 6, a right side surface 7, and a top surface 8.

The floor 3 is formed of, for example, a ceramic plate, the front surface 4, the left side surface 6 and the top surface 8 are formed of glass plates, and the back surface 5 and the right side surface 7 are made of natural wood (solid wood such as cedar). It is configured. Room 1 is front 4 in this example,
Since the left side surface 6 and the top surface 8 are made of glass plates, the light of the light source (illumination lamp or the like) 16 provided in the living space 2 sufficiently reaches the closed space 9 formed by the room 1. Therefore, it is not necessary to install a special light in the closed space 9 when spending time in the room 1. In addition, since the patient in the room 1 can check the state of the living space 2 through these three surfaces made of glass plates, it is expected that the feeling of obstruction can be alleviated.

The room 1 is provided with two types of air purifying devices 17 and 18 according to the embodiment of the present invention. The one air purifying device 17 is an introduced air purifying device, and is a purifying device for purifying the air in the living space 2 and introducing the air into the room 1. The other air purifying device 18 is a room air purifying device, and is a purifying device for purifying while circulating the air in the room 1.

In the room 1, for example, on the right side surface 7,
A door 51 is provided for a patient to enter and exit the closed space 9. The door 51 is a sliding door in this embodiment. In the case of a sliding door, there is little turbulence of the surrounding air due to opening and closing of the door, and when the patient enters the room 1, the advantage that the air in the living space 2 can directly enter the closed space 9 can be reduced. There is.

FIG. 5 is a sectional structural view showing a configuration example of the introduced air cleaning device 17. The cleaning device 17 includes a suction port 21 for sucking air in the living space 2, and a pre-filter 22 is fitted in the suction port 21. The pre-filter 22 is for capturing dust and the like contained in the air sucked from the suction port 21. In the cleaning device 17, a turbo fan 2 rotated by a motor 23 is provided.
4 is provided, and air is sucked from the suction port 21 by the rotation of the turbo fan 24. A filter 25 is provided in the passage of the sucked air. The filter 25 is a filter that removes harmful chemical substances contained in the sucked air by adsorbing them. Activated carbon, activated carbon fiber, zeolite, a chemical filter, or the like can be used alone or in combination as an adsorbent for a chemical substance contained in the filter 25.

Further, the filter 25 may be provided with a filter material such as a HEPA filter so as to remove not only chemical substances but also very fine particulate matters. The purified air that has passed through the filter 25 is
The air is blown out from the air outlet 26 into the room 1. The air outlet 26 is provided with a wind direction plate 27 so that the direction of the blown air can be adjusted.

The introduction air purifying device 17 is mainly composed of a material that generates little volatile harmful chemical substances.
For example, the turbo fan 24 is not a resin molded product,
For example, consideration has been given to being made of ceramic or inorganic metal. The introduced air cleaning device 17 includes a VOC sensor 90 and a control circuit 100 similar to those described with reference to FIG.
And a display 91. That is, a heater 97 and a detector 98 are provided to detect the state of adsorption of the volatile harmful chemical substance in the filter 25.

The operation and operation of these components are the same as those described with reference to FIGS. 1 and 2, and a duplicate description thereof will be omitted. FIG. 6 is a sectional structural view showing a configuration example of the room air cleaning device 18. The cleaning device 18 is provided with a suction port 32 on, for example, an upper surface of a housing 31. Inside the suction port 32, for example, a sirocco fan 33 is arranged as a suction fan. The air sucked from the suction port 32 by the rotation of the sirocco fan 33 passes through the air passage 34. A chemical substance adsorption filter 35 is arranged in the air path 34, and the chemical substance contained in the air flowing through the air path 34 is removed by the filter 35. In this embodiment, the air path 34 is U-turned in the housing 31 and is a relatively long air path. And, since the filter 35 is filled in the long air passage 34, the structure has a high cleaning ability for removing chemical substances.

A sirocco fan 36 is provided on the outlet side of the air passage 34 as a blowing fan. The rotation of the sirocco fan 36 sucks the air in the air passage 34, and the purified air is blown out from an air outlet 37 formed in the front of the housing 31. By providing the cleaning device 18 with two fans, a sirocco fan 33 for suction and a sirocco fan 36 for blowing out, the cleaning capability of the cleaning device 18 can be increased. Because of the use of the two fans 33 and 36, the air path 34
The air flow per unit time flowing through the inside can be increased, and a large amount of air is purified per unit time.
Further, since the air passage 34 is lengthened and the filter 34 is filled therein, the ratio of passing air to the filter 35 is large, and the chemical substances in the air can be sufficiently removed.

The suction port 32 and the air outlet 37 are provided with wind direction plates 38 and 39, respectively, so that the air suction direction and the air blow direction can be adjusted. Thereby, since the direction of the circulating air can be adjusted, it is possible to prevent the circulating air from forming a so-called short circuit in the closed space 9. The room air purifier 18 also
Starting with the housing 38, all components are
It is made mainly of materials that generate less volatile harmful chemicals.

The room air purifier 18 is also provided with a heater 97, a detector 98, a control circuit 100 and a display 91, as in the case of the introduced air purifier 17, whereby the volatile air in the filter 35 is removed. It is designed to be able to detect the state of adsorption of chemical substances. Here, the purifying ability of the introduction air purifying device 17 and the room air purifying device 18 will be described by comparing them.

The "cleaning capacity" is a capacity indicating how much a certain amount of air can be cleaned in a certain period of time, and is defined as "air flow rate x transient removal efficiency (transient cleaning efficiency)". be able to. The introduction air purifying device 17 purifies the air in the living space 2 and introduces the air into the closed space 9.
The air is transient and clean. For this reason, it is preferable that the introduction air cleaning device 17 be configured to have a high transient cleaning efficiency. The ventilation amount of the introduced air purifying device 17 may be lower than that of the room air purifying device 18.

On the other hand, it is preferable that the room air purifier 18 has a larger ventilation volume than the introduced air purifier 17. This is because the room air purifying device 18 purifies the air in the closed space 9 while repeatedly circulating the air. Therefore, if the ventilation amount is large, the circulation amount is large, and the purification of the air in the closed space 9 is promoted. Because. Room air purifier 1
It is preferable that the cleaning capacity of 8 is made larger than the cleaning capacity of the introduced air cleaning device 17 by increasing the amount of blown air. For example, assuming that the temporary cleaning efficiency of the introduction air cleaning device 17 is 70 to 90%, the temporary cleaning efficiency of the room air cleaning device 18 may be about 20 to 40%. However, if the amount of air blown by the in-room air cleaning device 18 is increased, it is possible to eventually increase the cleaning capability as compared with the introduction air cleaning device 17.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an air purifying apparatus for removing volatile harmful chemical substances according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the contents of a control operation executed by a control circuit in the apparatus of FIG.

FIG. 3 is an illustrative view showing a method of inspecting a sample piece taken out of an air purifying apparatus;

FIG. 4 is a perspective view showing an outline of an example of a room for a chemical sensitive patient.

FIG. 5 is a sectional structural view showing a configuration example of an introduction air cleaning device.

FIG. 6 is a sectional structural view showing a configuration example of a room air cleaning device.

[Explanation of symbols]

 17 Introducing air purifier 18 Room air purifier 90 VOC sensor 91 Indicator 92 Ventilation passage 93 Fan 94 Filter 95 Adsorbent 96, 101 Sample piece 97 Heater 98 Detector 100 Control circuit 102 Hot plate 105 Simple measuring instrument

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L058 BF03 BF09 BG04 4C080 AA05 BB10 HH05 KK08 LL01 MM04 MM05 QQ12 QQ17 4D002 AA40 AB03 AC10 BA04 BA14 CA07 DA41 DA45 EA08 EA13 GA02 GA03 GB01 GB02 GB03 HA03

Claims (6)

[Claims] An air passage through which air to be cleaned passes (92).
And an adsorbent (95) for adsorbing volatile harmful chemicals disposed in the ventilation path (92); and a VOC sensor for detecting volatile toxic chemicals provided in the ventilation path (92) ( 90) An air purifying apparatus for removing volatile harmful chemical substances, comprising: 2. The air purifying apparatus according to claim 1, wherein said VOC sensor (90) is adsorbed by an adsorbent (96) for adsorbing volatile harmful chemical substances, and is adsorbed by said adsorbent (96). Heating means (97) for heating the adsorbent to desorb the volatile harmful chemicals, and a detector (98) for detecting the amount of volatile harmful chemicals desorbed from the adsorbent (96) An air purifying apparatus for removing volatile harmful chemical substances, comprising: 3. The air purifying apparatus according to claim 2, wherein a part of said adsorbent (95) disposed in a ventilation path (92) is used as an adsorbent (96) of said VOC sensor. Air purifier to remove volatile hazardous chemicals. 4. The air purifying apparatus according to claim 2, further comprising a means (100) for integrating an air flow rate flowing through the ventilation path (92), wherein the integrating means (100) and An air purifying apparatus for removing volatile harmful chemical substances, comprising means for outputting the performance or replacement time of the adsorbent (95) based on the output of a VOC sensor (90). 5. A method for measuring an amount of a substance adsorbed on an adsorbent for adsorbing volatile harmful chemicals disposed in an air passage through which air to be cleaned passes, the method comprising: The part is a sample piece for adsorption amount analysis, the sample piece is heated to desorb the adsorbed substance,
A method for measuring the amount of volatile harmful chemicals, characterized by detecting the amount of desorbed substances with a detector. 6. A method for measuring the flow rate of air flowing through a ventilation path and measuring the degree of contamination of air flowing into the ventilation path based on the integrated value and the amount of the substance measured according to claim 5.