RU36780U1 - PULL OUT DROBE - Google Patents

Description

2003133S45

pull out drobe

The utility model relates to ventilation technology, namely, devices designed to remove harmful substances directly from the place of their formation, and can be used when working with chemical reagents in laboratory conditions.

Fume hoods are known in which the working chamber is made of glass, see prospectus of the American company LABCONCO Protector Class Mate Hoods, 2000

However, this design is very fragile and can be used solely for illustrative purposes, for example, to demonstrate chemical experiments in educational laboratories.

The closest in technical essence to the claimed one is a fume hood, including a work table with a worktop and a working chamber placed on it, placed in a housing, moreover, in

IPC: V08V 15/02

the front wall of the working chamber has an opening closed by a movable element (movable frame) with a transparent insert; inside the chamber there is a screen equipped with fasteners to the rear wall of the working chamber and installed with a gap relative to the countertop and top of the working chamber, the working chamber and countertop are rigidly interconnected, moreover, the width of the countertop is greater than the depth of the working chamber, the upper part of the working chamber is made with a bevel with sides of its rear wall, the width of the opening made in the front wall of the working chamber is less than the width of this wall, while the upper and lateral edges of the opening are provided with visors associated with a metal core mustache, and the back wall of the working chamber is equipped with pockets designed to accommodate, fasten the screen mounting elements to the back wall, and the pockets are placed so that it is possible to change the gap between the screen and the tabletop and the gap between the screen and the top of the working chamber, cm . RU, U1, 25177.

In the considered technical solution, the opening in the front wall of the working chamber is closed by an element movable in the vertical direction. This circumstance makes it impossible to increase the dimensions of the aperture in the vertical direction, which limits the possibility of using the cabinet when working with devices and installations of high height, for example, distillation

columns serviced at the top of the unit.

This utility model is aimed at solving the problem of ensuring the use of the cabinet when working with devices and installations of high height.

To solve the problem in a fume hood, which includes a work table with a worktop and a working chamber fixed on it, placed in a housing, moreover, an opening is closed in the front wall of the working chamber, closed by a movable element with a transparent insert, in accordance with a utility model, an element for closing the opening attached to the working chamber on the side of the opening by means of at least one hinge mounted vertically; the element for closing the opening can be divided vertically into two parts attached to the working chamber from opposite sides of the opening; the element for closing the opening may have through holes located in its lower part or may be equipped with a grill located in its lower part; the opening in the front wall of the working chamber may have a height equal to the height of the working chamber.

The applicant has not identified any technical solutions that have the same set of features as the claimed solution. This, according to the applicant, allows to conclude

compliance of the claimed object with the criterion of "novelty.

The proposed utility model is illustrated by a drawing, which shows a General view of the cabinet in a perspective view.

The fume hood contains a table 1 with a countertop 2, on which a working chamber 3 is installed, placed in a metal housing 4. In this case, the countertop 2 and chamber 3 are made of plastic and are rigidly connected, in this example glued together, forming a single whole. An opening is made in the front wall of the chamber 3 (not indicated by a separate position), closed by a movable element 5 with a transparent insert, in particular with tempered glass (not indicated by a separate position). Element 5 for closing the opening is attached to the working chamber 3 on the side of the opening by means of at least one hinge 6 mounted vertically.

In an advantageous embodiment, the element 5 for closing the opening is divided vertically into two parts (doors) 7 and 8 attached to the working chamber 3 by means of hinges 6 mounted vertically on the working chamber 3 from opposite sides of the opening.

Element 5 for closing the opening, and if it is divided into two doors, at least one of them 7 or 8, or both doors 7.8 can have through holes 9 located in their lower part for supplying air to the working chamber 3.

Element 5 for closing the opening for supplying air to the working chamber 3 may be provided with a grill located in its lower part; in case element 5 is divided into two doors, at least one of them 7 or 8, or both doors 7.8 in their lower part can be equipped with grilles.

In a specific embodiment, the opening in the front wall of the working chamber 3 has a height equal to the height of the working chamber 3.

The proposed fume hood operates as follows.

Through the open doors 7.8 on the countertop 2, chemical reagents and the necessary equipment are installed: devices and installations whose height does not exceed the height of the working chamber 3, for example, a distillation column. Due to the fact that the doors 7 and 8 have a height close to or equal to the height of the working chamber 3, it is possible to service the equipment in its upper part. By connecting the ventilation system in the working chamber 3, an air pressure is created, as a result of which the harmful substances formed during operation enter the exhaust duct and are removed through the exhaust pipe, and air is supplied through the openings 9 in the lower part of doors 7 and 8 to the working chamber 3.

Thus, a fume hood, made in accordance with the proposed utility model, can be used to work with

devices and installations of high height.

The proposed utility model can be implemented using conventional, well-known materials and devices, which, according to the applicant, indicates the compliance of the claimed object with the criterion of "industrial applicability.

Claims (5)

1. An exhaust hood including a work table with a worktop and a working chamber fixed on it, placed in the housing, wherein an opening is made in the front wall of the working chamber, closed by a movable element with a transparent insert, characterized in that the element for closing the opening is attached to the working chamber with the side of the opening by means of at least one hinge mounted vertically. 2. A fume hood according to claim 1, characterized in that the element for closing the opening is divided vertically into two parts attached to the working chamber from opposite sides of the opening. 3. A fume hood according to claim 1 or 2, characterized in that the element for closing the opening has through holes located in its lower part. 4. A fume hood according to claim 1 or 2, characterized in that the element for closing the opening is provided with a grill located in its lower part. 5. A fume hood according to any one of claims 1 to 4, characterized in that the opening in the front wall of the working chamber has a height equal to the height of the working chamber.