RU172535U1 - DEVICE FOR HUMAN INHALATION FROM AEROSOL FACTION - Google Patents

Abstract

The utility model relates to devices for taking air samples for subsequent measurement of the content of harmful gases and pesticides in it and can be used in studies to assess the standards for the content of harmful impurities in the air. A device for aspirating a person inhaled aerosol fraction is intended for the quantitative assessment of harmful impurities in the air inhaled by a person through the nose.

Description

The inventive utility model relates to devices for taking air samples for subsequent measurement of the content of harmful gases and pesticides in it, and can be used in studies to assess the standards for the content of harmful impurities in the air. A device for aspirating a person inhaled aerosol fraction is intended for the quantitative assessment of harmful impurities in the air inhaled by a person through the nose.

Known device A.I. Burshtein (“Methods of investigation of dust and smoke” by A.I. Burshtein, Kiev 1954), which allows determining the weight amounts of the dispersed phase of aerosols inhaled by humans, and containing a glass tube for the filter 7 cm long with an inlet in cross section 2 cm ² facing downwards, densely connected by microsection at a distance of 2.5-3.0 cm wider glass tube ending with a drum, from which depart two ducts 8 mm in diameter, to which by short rubber tubes connected s arcuately curved tube having a diameter of 8 mm extending from nasal olive wide, in form of a cup, open-hole and with an extension at the bottom, which is put on the short rubber tube, sealingly closing the nostrils when administered to the human into them olives. At the site of the thin section over the second tube, a thin elastic disconnected metal ring is put on, lined from the inside with cloth or leather, the dimensions of which can be changed by means of a screw. A narrow metallic elastic rod departs from the ring at an acute angle, ending in a loop and consisting of two parts sliding on one another to adjust the size, connected to the tape, worn on the forehead of a person.

The disadvantages of this device are:

- the process of sampling air is carried out through a device inserted directly into the nose of a person;

- the impossibility of using dense filters to capture fine aerosol, in connection with the inevitable violation of the human breathing regime;

- the possibility of harming human health;

- a large distance from the intake hole to the head of a person;

- instability of human breathing during sampling;

- the presence of fragile parts (glass tubes) imposes a number of restrictions on the transportation, storage and operation of the device.

The tasks of creating the proposed utility model are:

- aspiration of the inhaled fraction of the aerosol without direct human involvement;

- aerosol aspiration in the breathing mode of a person performing work of average physical activity;

- modeling of aerodynamic aerosol flow around a person’s head.

The tasks are solved in that the device for aspiration of the inhaled fraction of the aerosol containing the filter collector, according to the proposed solution, is hermetically mounted behind the nasal openings of the dummy of the human head and connected by a vacuum hose to a gas meter that measures the flow rate of sucked-in air and a control valve that regulates the volume of sucked-in air connected by a vacuum hose through a locking mechanism that blocks the movement of air with a frequency of control signals from an impu generator of ice packs, with a vacuum chamber and a high-pressure vacuum pump, providing stable aspiration of samples with parameters corresponding to the breathing of a person performing moderate physical activity work.

Comparative characteristics of the proposed utility model with the device A.I. Burshtein is presented in table 1.

The proposed utility model is illustrated by drawings, where in FIG. 1 is a diagram of a device for aspirating a person inhaled aerosol fraction, which includes: a vacuum chamber 1, a high-pressure vacuum pump 2, an ultra-low frequency pulse generator 3, a locking mechanism 4, a control valve 5 and a gas meter 6, which use an electronic flow meter MASS-VIEW type MV306, filter collector 7, model of the human head 8.

In FIG. 2 shows an ultra-low frequency pulse generator 3, a locking mechanism 4, a gas meter 6.

In FIG. Figure 3 shows the MASS-VIEW electronic flowmeter type MV306, which acts as the control valve 5 and gas meter 6.

In Fig. 4, a dummy of a human head 8 is presented with a filter-collector 7 integrated in it, where 9 are nasal openings.

A device for aspirating a person inhaled aerosol fraction, see FIG. 1, contains a vacuum chamber 1 with a capacity of 250 l and a high-pressure vacuum pump 2 of type 2НВР - 5 ДМ, to create sufficient discharge during continuous air suction at a given speed through a filter collector 7, an ultra-low frequency pulse generator 3, and a locking mechanism 4 to provide a pulse sampling through a filter collector 7 with a frequency corresponding to the frequency of inspirations of a person performing work of moderate physical load, adjusting valve 5 and gas meter 6, for measuring air volume, p absorbed through the filter collector 7.

The device operates as follows: the vacuum created by the vacuum pump 2 induces air leakage sequentially through the filter collector 7 located in the model of the human head 8, gas meter 6, control valve 5, shut-off mechanism 4 and vacuum chamber 1. Air flow pulsations arising during the operation of the vacuum pump 2, they are smoothed out by the vacuum chamber 1. In this case, the pulse generator 3, working with the frequency of the control pulses corresponding to the frequency of inspirations of the person performing the work of an average physical load In order to reduce the severity, it transfers them to the locking mechanism 4, blocking, with an appropriate frequency, the air movement through the filter collector 7. The flow rate of air sucked through the filter collector 7 is regulated by a control valve 5 and is measured by a gas meter 6, which use an electronic flow meter MASS-VIEW type MV306, providing a range of measurements of air flow in the range from 2 to 200 l / min.

The proposed utility model can be made on the basis of units and elements manufactured by the domestic industry using modern mastered technology and can be used to conduct studies to evaluate the aspiration of harmful impurities in the air inhaled by humans.

Claims (1)

A device for aspirating an inhaled human fraction of an aerosol containing a filter collector, characterized in that the filter collector is hermetically mounted behind the nasal openings of the dummy of a person’s head and is connected by a vacuum hose to a gas meter that measures the rate of sucked-in air and a control valve that regulates the amount of sucked-in air, connected by a vacuum hose through a locking mechanism that blocks the movement of air with a frequency of control signals from a rectangular pulse generator, with a vacuum chamber high vacuum and the vacuum pump.

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