RU-2861390-C1 - MINE AIR CONDITIONER AND FLAME ARRESTER THEREFOR

RU2861390C1RU 2861390 C1RU2861390 C1RU 2861390C1RU-2861390-C1

Abstract

FIELD: air conditioning. SUBSTANCE: group of inventions relates to a mine air conditioner and a flame arrester therefor. The air conditioner comprises an evaporator, a condenser, a compressor, an electronic expansion valve, interconnected by pipelines. The air conditioner is additionally equipped with an explosion-proof shell, inside which the compressor with the electronic expansion valve is located. Flame arresters for the mine air conditioner are installed on the pipelines of the compressor and the electronic expansion valve at the inlet and outlet of the explosion-proof shell. The flame arresters consist of a cylindrical housing with flame-arresting elements installed inside, fixed on both sides by flanges connected to the housing. A set of bushings installed coaxially between steps is used as the flame-arresting elements. The steps are made at the ends of the flanges facing each other. In one flange, the steps are directed from the central axis to the periphery, and in the other – in the opposite direction. The radial dimensions of the bushings are made to ensure annular gaps between them. The sum of the cross-sectional areas of the annular gaps perpendicular to the housing axis is equal to the cross-sectional area of the inlet and outlet openings of the flame arrester located in the flanges. EFFECT: expansion of the scope of use by increasing the level of safety, creating the possibility of using a serial air conditioner in a mine. 2 cl, 4 dwg

Inventors

Butakov Sergei Valerevich
Levin Lev Iurevich

Dates

Publication Date: 20260505
Application Date: 20250904

Claims (2)

1. A mine air conditioner comprising an evaporator, a condenser, a compressor, an electronic expansion valve interconnected by pipelines, characterized in that the air conditioner is additionally provided with an explosion-proof enclosure within which a compressor with an electronic expansion valve is located, and flame arresters for the mine air conditioner are installed on the pipelines of the compressor and the electronic expansion valve at the inlet and outlet of the explosion-proof enclosure, consisting of a cylindrical housing with flame arresting elements installed inside, fixed on both sides by flanges connected to the housing, wherein a set of bushings is used as flame arresting elements, installed coaxially between steps made in the ends of the flanges directed towards each other, and in one flange they are directed from the central axis to the periphery, and in the other - in the opposite direction, and the radial dimensions of the bushings are made to provide annular gaps between them, and the sum of the area of their cross-sections perpendicular to the axis of the housing is equal to the area of the cross-sections of the incoming and the outlet openings of the flame arrester located in the flanges.
2. A flame arrester for a mine air conditioner, consisting of a cylindrical housing with flame arresting elements installed inside, fixed on both sides by flanges connected to the housing, characterized in that a set of bushings is used as flame arresting elements, installed coaxially between steps made in the ends of the flanges directed towards each other, and in one flange they are directed from the central axis to the periphery, and in the other - in the opposite direction, and the radial dimensions of the bushings are made to provide annular gaps between them, and the sum of the area of their cross-sections perpendicular to the axis of the housing is equal to the cross-sectional area of the inlet and outlet openings of the flame arrester, located in the flanges.

Description

The invention relates to devices for air conditioning in explosive gas environments, for example in a mine. The closest technical solution to the proposed mine air conditioner device is an air conditioner containing an evaporator, a condenser, a compressor, an electronic expansion valve, interconnected by pipelines (See patent RU No. 2133922). Its disadvantage is that it cannot be used in explosive environments, for example, for cooling air in a mine due to the possibility of becoming a source of ignition for gases present in the mine. The technical objective of the proposed mine air conditioner device is to expand the scope of use by increasing the level of safety and creating the possibility of using a serial air conditioner in a mine. For this purpose, a shaft air conditioner is proposed, containing an evaporator, a condenser, a compressor, an electronic expansion valve, interconnected by pipelines, and the air conditioner is additionally equipped with an explosion-proof casing, inside which a compressor with an electronic expansion valve is located, and flame arresters are installed on the pipelines of the compressor and the electronic expansion valve at the inlet and outlet of the explosion-proof casing. A distinctive feature of the proposed mine air conditioner device is that the mine air conditioner is additionally equipped with an explosion-proof casing, inside which a compressor with an electronic expansion valve is located, and flame arresters are installed on the compressor and electronic expansion valve pipelines at the inlet and outlet of the explosion-proof casing. The closest technical solution to the proposed air conditioner flame arrester is a mine air conditioner flame arrester consisting of a cylindrical housing with flame arresting elements installed inside, secured on both sides by flanges connected to the housing. (See RU Patent No. 197289, published April 20, 2020.) Its disadvantage is low reliability and the impossibility of long-term use in the aggressive environment of a mine. The technical objective of the proposed technical solution is to increase reliability and expand the possibility of long-term use of the flame arrester in the mine air conditioner device. For this purpose, the flame arrester for a mine air conditioner consists of a cylindrical housing with flame arresting elements installed inside, fixed on both sides by flanges connected to the housing, wherein a set of bushings installed coaxially between steps made in the ends of the flanges directed towards each other is used as flame arresting elements, and in one flange they are directed from the central axis to the periphery, and in the other in the opposite direction, while the radial dimensions of the bushings are made to provide annular gaps between them, and the sum of the area of their cross-sections perpendicular to the axis of the housing is equal to the cross-sectional area of the inlet and outlet openings of the flame arrester. A distinctive feature of the proposed flame arrester is that a set of bushings installed coaxially between steps made in the ends of flanges directed towards each other are used as flame arresting elements, and in one flange they are directed from the central axis to the periphery, and in the other in the opposite direction, while the radial dimensions of the bushings are made to provide annular gaps between them, and the sum of the area of their cross-sections perpendicular to the axis of the housing is equal to the cross-sectional area of the inlet and outlet openings of the flame arrester. The essence of the invention is explained by drawings, where Fig. 1 shows the general structural diagram of a mine air conditioner, Fig. 2 shows the general view of an explosion-proof shell, Fig. 3 shows the calculated voltage of the explosion-proof shell, and Fig. 4 shows a section of the flame arrester. The mine air conditioner contains an evaporator 1, a condenser 2, a compressor 3, an electronic expansion valve 4, interconnected by pipelines 5. Moreover, the air conditioner is additionally provided with an explosion-proof casing 6, inside which a compressor 3 with an electronic expansion valve 4 is located, and flame arresters 7, 8, 9, 10 are installed on the pipelines of the compressor 3 and the electronic expansion valve 4 at the inlet and outlet of the explosion-proof casing 6. The shell has encircling stiffening ribs 11 (see Fig. 2). This encircling principle imparts monolithicity and load-distribution continuity to the shell structure, thereby reducing the number of stress concentrators in the corner joints. The height of the ribs 11 is set based on the optimal number of stiffening ribs and the final dimensions of the shell with ribs. The location and number of stiffeners were selected by iterative calculations in the ANSYS software package (https://www.ansys.com/) using the methodology (Okonechnikov A.S., Serdyuk D.O., Fedotenkov G.V. Strength and dynamic calculations in the ANSYS Workben