JPH05332963A - Measuring apparatus of concentration of odor - Google Patents

Abstract

PURPOSE:To enable automatic control of the number of times of ventilation of a room and the operation of an electric dust collector, attainment of energy saving, automatic judgement of the timing of overhaul maintenance of a filter deodorizing device and prevention of troubles such as being odorous, by an apparatus which enables scientific measurement of the odor judged by the human sense, by means of an existing sensor. CONSTITUTION:A first measuring device comprising an absorbing liquid tank 2 for dissolving air containing odor and an electric conductivity meter 3 for measuring a change in the electric conductivity of an absorbing liquid of this absorbing liquid tank 2, and a second measuring device comprising a combustor 4 for subjecting the air containing the odor to incomplete combustion and a gas detecting sensor 6 for measuring the concentration of a reducing gas generated in this combustor 4, are combined together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an odor concentration measuring device.

[0002]

2. Description of the Related Art Conventionally, there is no established means for measuring odor. The reason for this is that there are various factors that cause odor, and it is not possible to develop a sensor that detects this.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an odor concentration measuring device which eliminates the inconveniences of the conventional example and which can detect the odor concentration with an existing sensor.

[0004]

In order to achieve the above-mentioned object, the present invention comprises an absorption liquid tank for dissolving air containing odor and a means for measuring a change in electric conductivity of the absorption liquid in the absorption liquid tank. A first measuring device, a second measuring device including a combustor for incompletely combusting air containing odor and a gas detection sensor for measuring the concentration of reducing gas generated in the combustor are combined. That is the summary.

[0005]

The inventor notices that odor has both water-soluble and oil-based properties, classifies the odor into water-soluble property and oil-based property, and utilizes the respective characteristics to detect. In the case of water-soluble odor, it is dissolved in water and its water quality is used to change the quality of the odor. Changes. The odor ratio can be measured by measuring the change.

In the case of oily odor, the oily substance is burned at a high temperature, and at this time, incomplete combustion is used to generate a reducing gas. The odor concentration can be measured by detecting the amount of the reducing gas generated.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an outline of an odor concentration measuring device.

The present invention uses a blower or the like,
A device for detecting water-soluble odors and a device for detecting oily odors are provided for the aspirator 1 for quantitatively sucking air containing odors.
A system of equipment is provided. Among them, as a device for detecting water-soluble odor, an absorbing liquid tank 2 using pure water as an absorbing liquid,
An electric conductivity meter 3 for measuring a change in electric conductivity of the absorption liquid from the absorption liquid tank 2.

On the other hand, as a device for detecting an oily odor,
A combustor 4 for incompletely combusting air containing odor from the aspirator 1, a cooler 5 for cooling the incompletely combusted gas in the combustor 4 into a reducing gas, and a reducing property in the cooler 5. And a gas detection sensor 6 for detecting the gas concentration.

Next, specific examples of the device for detecting the water-soluble odor and the device for detecting the oily odor will be described. First, as shown in FIG. 2, a device for detecting water-soluble odor connects a blower 7 as an aspirator 1 to the inside of an absorption liquid tank 2 by a pipe, and a pump 8 for quantitative injection is provided in the absorption liquid tank 2 in the middle. The pure water supply pipe 9 provided at is also connected.

A measuring tank 11 having an electrode 10 as an electric conductivity meter 3 is attached to the absorbing liquid tank 2.

On the other hand, as a device for detecting an oily odor, as shown in FIG. 3, a combustion heater 12 as a combustor for complete combustion is provided in the middle of the piping from the blower 7.
The cooler 5 and the gas detection sensor 6 using a ceramics sensor are sequentially provided.
An air supply pipe 14 having a flow rate control valve 13 is joined to a pipe between the cooling device 5 and the cooler 5.

It should be noted that a pipe between the blower 7 and the combustion heater 12 may be branched to the air supply pipe 14, and the branch pipe may be used. In this way, the air supply pipe 14 can be configured as a bypass pipe that does not pass from the blower 7 to the combustion heater 12 or the cooler 5.

To explain the usage, in the case of a water-soluble odor, the air containing the odor is sucked by the blower 7 and blown into the absorbing liquid tank 2. The water-soluble components in the blown air are dissolved in the absorption liquid of pure water. It is assumed that the amount of air sent from the blower 7 and the amount of pure water sent to the absorbent tank 2 through the pure water supply pipe 9 are always constant.

In this way, the absorption liquid in the absorption liquid tank 2 is sent to the measuring tank 11, and the change in the electric conductivity of the absorption liquid at the ratio of being dissolved in the water of the odorous substance and being ionized by the electrode 10 is measured. Then, the amount of the water-soluble component existing in the atmosphere at that time can be grasped, and the odor intensity can be obtained from the amount of the water-soluble component.

Of the odorous substances, the oily component is mainly composed of polyfatty acid aromatic hydrocarbons. Therefore, when the air from the blower 7 is burned by the combustion heater 12, it is incompletely burned. If this incompletely burned substance is cooled by the cooler 5, it becomes a reducing gas. Therefore, if the reducing gas concentration is detected by the gas detection sensor 6, the odor intensity can be obtained.

There is currently no sensor for quantitatively and inexpensively measuring gas. Therefore, although a ceramic sensor is used as the gas detection sensor 6, the flow control valve 13 is used to adjust the amount of dilution air, and the odor intensity is obtained from the dilution ratio at the detection limit.

[0018]

As described above, the odor concentration measuring device of the present invention is capable of scientifically measuring an odor judged by human senses with an existing sensor. You can automatically control the operation of the dust machine,
It is possible to save energy.

Further, the timing of overhaul / maintenance of the filter deodorizing device can be automatically judged, and troubles such as dullness and smell can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an odor concentration measuring device of the present invention.

FIG. 2 is an explanatory view of a device portion for detecting a water-soluble odor of the odor concentration measuring device of the present invention.

FIG. 3 is an explanatory diagram of a device portion for detecting an oily odor of the odor concentration measuring device of the present invention.

[Explanation of symbols]

1 ... Suction device 2 ... Absorption liquid tank 3 ... Electric conductivity meter 4 ... Combustor 5 ... Cooler 6 ... Gas detection sensor 7 ... Blower 8 ... Fixed amount injection pump 9 ... Pure water supply pipe 10 ... Electrode 11 ... Measuring tank 12 ... Combustion heater 13 ... Flow control valve 14 ... Air pipe

Claims (1)

[Claims] 1. An absorption liquid tank for dissolving air containing odor,
A first measuring device comprising means for measuring a change in electric conductivity of the absorbing liquid in the absorbing liquid tank, a combustor for incompletely combusting air containing odor, and a concentration of reducing gas generated in the combustor. An odor concentration measuring device characterized by being combined with a second measuring device consisting of a gas detection sensor for measuring.