RU219120U1 - Mobile sampling box - Google Patents

Abstract

The utility model relates to means for taking samples in a dust-free abacterial air environment, protecting working materials from external and cross-contamination, as well as protecting personnel and the environment from aerosol pollution that occurs during the performance of work. The technical solution can be used when equipping individual workplaces of medical, pharmaceutical and other institutions with high requirements for air purity in the working area.

The technical result of the proposed solution is aimed at creating a downward unidirectional air flow inside the box, as well as creating an air curtain in the working opening, which ensures the protection of the test product (including from cross-contamination), and also allows you to remove contaminants that occur during operation using filtration of the internal air flow and the air removed from the box.

Sampling box contains a body, in the upper part of which there is a filter-ventilation module, in the middle part of the body there is a working chamber with a perforated tabletop, the front panel of the working chamber is installed at an angle relative to the vertical plane of the body, an air duct formed between the rear wall of the working chamber body and the high chamber pressure of the filter-ventilation module, a control system, while the filter-ventilation module contains an upper high-pressure chamber, where an exhaust fan and an exhaust HEPA filter are installed, which is connected to the atmosphere and installed at the outlet, as well as a second high-pressure chamber with an inlet HEPA filter installed under angle to the horizontal plane at the inlet of the working chamber, and both chambers are installed with a gap in relation to the walls of the housing. In the lower part of the box, a loading chamber is installed, which communicates with the working chamber through the tabletop, while the tabletop is made up of two shelves. The working chamber is equipped with an air flow laminarizer installed at the border with the filter-ventilation module. At least one shelf of the tabletop is removable or foldable.

Description

The utility model relates to means for taking samples in a dust-free abacterial air environment, protecting working materials from external and cross-contamination, as well as protecting personnel and the environment from aerosol pollution that occurs during the performance of work. The technical solution can be used when equipping individual workplaces of medical, pharmaceutical and other institutions with high requirements for air purity in the working area

A laboratory box is known from the prior art, containing a housing in which a filter chamber and a working chamber are located, at the outlet of which there is a table with perforations, an air duct connecting the outlet of the working chamber with the inlet of the filter chamber and a fan installed at the inlet to the filter chamber (patent US5700190, IPC B08B 15/08, published 12/23/1997). The disadvantage of the known cabinet is the low degree of purification of the passing air flow.

A laboratory box for sterile work is known from the prior art, containing a housing in which a filter chamber is made, the outlet of which is connected through the first filter to the inlet of the working chamber and at the outlet of which there is a table made with perforations, an air duct connecting the outlet of the working chamber with the inlet of the filter chamber equipped with a second filter installed in the filter chamber on the vertical wall of the housing; the possibility of changing its flow area, and the fan contains a speed controller (RU28639, IPC B08B 15/02, publ. 10.04.2003). A disadvantage of the known laboratory Cabinet are low performance due to insufficient purification of the passing air.

Class II microbiological safety cabinets are known from the prior art (https://www.lamsys.ru/catalog/boksy-mikrobiologicheskoy-bezopasnosti-klass-ii-tipb2/bmb-ii-laminar-s-1-2/, accessed 21.02 .2023), in which there is a filter chamber and a working chamber, at the exit of which there is a table with perforations, an air duct connecting the outlet of the working chamber with the inlet of the filter chamber and a fan installed at the inlet to the filter chamber. A disadvantage of the known laboratory Cabinet are low performance due to insufficient purification of the passing air.

The box does not provide protection against volatile toxic chemicals and radionuclides, and does not retain the odors of working agents.

The technical result of the proposed solution is aimed at creating a downward unidirectional air flow inside the box, as well as creating an air curtain in the working opening, which ensures the protection of the test product (including from cross-contamination), and also allows you to remove contaminants that occur during operation using filtration of the internal air flow and the air removed from the box.

The technical result is achieved by the fact that the mobile sampling box contains a housing, in the upper part of which there is a filter-ventilation module, in the middle part of the housing there is a working chamber with a perforated tabletop, the front panel of the working chamber is installed at an angle relative to the vertical plane of the housing, the loading chamber air duct formed by between the rear wall of the working chamber housing and the high-pressure chamber of the filter-ventilation module, a control device, while the filter-ventilation module contains an exhaust chamber where an exhaust fan and an exhaust HEPA filter are installed, which is connected to the atmosphere and installed at the outlet, as well as an intake chamber with an inlet HEPA - a filter installed at an angle to the horizontal plane at the inlet of the working chamber, and both chambers are installed with a gap in relation to the walls of the housing, according to the utility model, a loading chamber is installed in the lower part of the box, which communicates with the working chamber through the tabletop, while the tabletop is made of a composite of two shelves, the side panels of the case in its upper part are made removable, and the side panels of the working chamber are made of transparent material, in addition, the working chamber is equipped with an air flow laminarizer installed at the border with the filtering module, as well as the fact that the sampling box contains transport wheels to move the box.

Also, in a particular case of execution, at least one shelf of the tabletop is made removable or folding.

In a particular case of execution, a preliminary filter for cleaning contaminated air is installed in the air duct of the loading chamber.

The front panel of the loading chamber is made of transparent material and is foldable with the possibility of fixing in a vertical position using built-in magnets and stops.

The front panel of the working chamber is hinged with the possibility of fixation in the upper position by means of gas-filled shock absorbers.

The control device contains a microprocessor device, a display and a touch panel.

The presence in the box of a filter-ventilation module that contains a high-pressure exhaust chamber, where an exhaust fan and an exhaust HEPA filter are installed, which is connected to the atmosphere and installed at the outlet, as well as a second high-pressure supply chamber with an inlet HEPA filter installed at an angle to the horizontal plane at the inlet of the working chamber, creates a downward unidirectional air flow inside the box, and also creates an air curtain in the working opening of the working chamber, which ensures the protection of the product (including from cross-contamination), and also allows you to remove contaminants that occur during operation from by filtering the internal air flow and the air removed from the box.

The presence in the working chamber of the laminarizer of the air flow, installed at the border with the filter-ventilation module, ensures the creation of a homogeneous, downward, unidirectional blowing of the laminar air flow.

The presence of a perforated composite tabletop in the working chamber ensures the connection of the working chamber with the air duct and the loading chamber, which also contributes to the passage of a descending unidirectional laminar flow, removal of aerogenic contaminants from the working chamber, filtering the air ejected from the box.

The implementation of the perforated table top, which is made up of two shelves, which can be made removable or folding, in addition to the convenience and safe work of personnel for sampling the product, ensures the direction of the laminar air flow to the shelf of the table top, and from there - supply through the perforations of the shelf and discharge into the air duct of the loading chamber . And the presence in the air duct of the loading chamber of the preliminary filter for cleaning contaminated air provides preliminary purification of the air coming from the loading chamber into the air duct.

The inclination of the front panel of the working chamber relative to the vertical plane of the body increases the working volume of the chamber. The execution of the front and side panels of the working chamber from a transparent material improves the visibility in the working chamber. Installing the front panel of the working chamber hinged with the possibility of fixing in the upper position by means of gas-filled shock absorbers provides convenience, for example, when sanitizing the working chamber, and its fixation in the upper position by means of gas-filled shock absorbers is reliable and safe. The implementation of the side panels of the housing in its upper part is removable allows the replacement of filter elements without disassembling the entire housing.

The execution of the front panel (hereinafter referred to as the folding ramp) of the loading chamber is folding with the possibility of fixing in a vertical position using built-in magnets and stops provides the convenience of placing the container with the product inside the chamber, and its fixation in the upper position by means of magnets and stops is reliable and safe.

The essence of the utility model is illustrated by the drawings, where in Fig. 1 shows a general view of the box; in fig. 2 - side view; in fig. 3 is a diagram of air flows.

The positions in FIG. 1 and FIG. 2 the following elements are indicated: 1 - body, 2 - filter-ventilation module (hereinafter referred to as FVM); 3 - working chamber; 4 - air duct; 5 - high pressure supply chamber; 6 - recirculation fans; 7 - supply HEPA filter; 8 - high pressure exhaust chamber; 9 - exhaust fan; 10 - outlet HEPA filter; 11 - damper of the exhaust opening; 12 - laminarizer; 13 - front glass; 14 - gas shock absorber; 15 - composite tabletop; 16 - LED lamp; 17 - front panel; 18 - control device; 19 - loading chamber; 20 - folding ramp; 21 - emphasis; 22 - pre-filter; 23 - tray loading chamber; 24 - wheels.

When the box is turned on by recirculation (supply) fans 6, air from the atmosphere is pumped into the working chamber 3, and from there it enters the loading chamber 19 through the table top 15. From the loading chamber 19 through the pre-filter 22 through the air duct 4, the contaminated air enters the high-pressure supply chamber 5, in which a zone of high pressure is created, and in the duct 4 - a zone of low pressure. From chamber 5, the purified high-pressure air through the inlet HEPA filter 7 and the laminator 12 enters the working chamber 3. The laminar flow of purified air (Fig. 3) enters the working chamber 3 parallel to the front panel 13, providing the parameters of the air environment necessary for operation.

The operator has the ability to access the working space on the tabletop 15 when the front panel 13 of the working chamber 3 is open and fixed in the upper position by means of gas-filled shock absorbers 14. For the convenience of the operator, LED lighting 16 of the working chamber 3 is provided. for example, it is rigidly fixed on the left, and folding is made on the right. Control over the work on sampling is carried out by the operator through a transparent front panel 13, which is also a means of protecting the operator's face.

From air duct 4, air is again supplied by fans 6 to the working chamber, and additional volumes obtained from the “air lock” enter the high-pressure exhaust chamber 8 and are removed into the atmosphere through the exhaust HEPA filter 10 by the exhaust fan 9. A special damper 11 is designed to protect exhaust HEPA filter 10.

To move large objects inside the box, a folding ramp 20 is used, which is fixed in a vertical position using built-in magnets and two stops 21 (Fig. 2). A pallet 23 is installed at the bottom of the loading chamber 19. Perforations are provided in the front part and on the back wall of the pallet 23 to exhaust air from the loading chamber 19 of the box. A pre-filter 22 is installed in the lower part of the air duct 4. To move the box, transport wheels 24 are provided, two of which can be equipped with brakes.

Management of operating modes, as well as control over the operation of the box, is carried out using the control device 18, which contains, among other things, a microprocessor device, a display and a touch panel and other blocks (not shown in Fig. 1 and Fig. 2). The presence of a microprocessor device, a display and a touch panel in the control device allows you to automatically maintain a normalized flow rate in the working chamber, regardless of the degree of contamination of the filters, monitor changes in parameters and control them outside the device.

Thus, the presented box is designed in such a way as to provide product protection (including from cross-contamination), remove contaminants arising during operation by filtering the internal air flow and the air removed from the box. This is achieved by creating a downward unidirectional air flow inside the box, as well as by creating an air curtain in the working opening, which prevents the release of aerosols outside the box.

Claims (6)

1. A mobile sampling box, containing a housing in the upper part of which a filter-ventilation module is located, in the middle part of the housing there is a working chamber with a perforated tabletop, the front panel of the working chamber is installed at an angle relative to the vertical plane of the housing, the loading chamber air duct formed between the back wall housing of the working chamber and a high-pressure chamber of the filter-ventilation module, a control device, while the filter-ventilation module contains an exhaust chamber, where an exhaust fan and an exhaust HEPA filter are installed, which is connected to the atmosphere and installed at the outlet, as well as an intake chamber with an inlet HEPA filter, installed at an angle to the horizontal plane at the inlet of the working chamber, and both chambers are installed with a gap in relation to the walls of the housing, characterized in that a loading chamber is installed in the lower part of the box, which communicates with the working chamber through the tabletop, while the tabletop is made up of two shelves , the side panels of the body in its upper part are made removable, and the side panels of the working chamber are made of transparent material, in addition, the working chamber is equipped with an air flow laminarizer installed at the border with the filter-ventilation module, as well as the fact that the sampling box contains transport wheels to move the box. 2. Sampling box according to claim 1, characterized in that at least one shelf of the tabletop is removable or foldable. 3. Box for sampling according to claim 1, characterized in that a preliminary filter for cleaning contaminated air is installed in the air duct of the loading chamber. 4. Sampling box according to claim 1, characterized in that the front panel of the loading chamber is made of transparent material and is hinged with the possibility of fixing in a vertical position using built-in magnets and stops. 5. Sampling box according to claim 1, characterized in that the front panel of the working chamber is hinged with the possibility of fixation in the upper position by means of gas-filled shock absorbers. 6. Box for sampling according to claim 1, characterized in that the control device contains a microprocessor device, a display and a touch panel.

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