Patent ID: 11918713
Assignee: HARBIN INSTITUTE OF TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A system for air exchange and sterilization in a room, the system comprising:
a high-temperature negative-pressure air exchange sterilizer (21) arranged to exhaust indoor air out of the room, and
a differential pressure control valve (1) arranged to introduce outdoor air into the room,
wherein the high-temperature negative-pressure air exchange sterilizer (21) comprises a first air inlet (6), an inlet filter (7), a check valve (8), a negative-pressure fan (9), pipeline A (10), pipeline B (25), a thermal insulation material (11), a plurality of heating rods (12), a plurality of temperature sensors (13), a butterfly valve (14), an outlet filter screen (15), an air outlet (16) and a waterproof shell (17),
the first air inlet (6) is disposed at a bottom part of the waterproof shell (17) to introduce indoor air into the high-temperature negative-pressure air exchange sterilizer (21);
the inlet filter (7) and the check valve (8) are installed at the first air inlet (6);
air entering from the air inlet (6) passes through the inlet filter (7), and is divided into a first path and a second path at the check valve (8), the first path is communicated with the negative-pressure fan (9) through a pipeline B (25), and a second path is communicated with the air outlet (16) through the pipeline A (10);
the plurality of heating rods (12) are disposed in the pipeline A (10);
one temperature sensor of the plurality of temperature sensors (13) is disposed beside each of the plurality of heating rods (12);
the pipeline A (10) is zigzag disposed at an upper part of the waterproof shell (17);
the thermal insulation material (11) is disposed outside a zigzag part; and
the butterfly valve (14) and the outlet filter screen (15) are sequentially disposed at the air outlet (16) in an air exhaust direction;
the sterilization temperatures of the plurality of heating rods (12) are set in a stepped manner, so that service life of a heating unit is prolonged, and equipment safety is improved;
the differential pressure control valve (1) is installed on a wall body of the room, and separate from the high-temperature negative-pressure air exchange sterilizer (21), and comprises a filter (22), a one-way valve (23) and a differential pressure gauge (24); the filter (22) is disposed at second air inlet of the differential pressure control valve (1); and the one-way valve (23) controls opening and closing of the second air inlet; and
the differential pressure gauge (24) is configured to detect indoor and outdoor differential pressure; and when the differential pressure exceeds a set range of the differential pressure gauge (24), the one-way valve (23) is opened, and outdoor air is filtered by the filter (22) and then enters into the room.