Aspirator and vehicle air-conditioning device using same

Abstract

An object is to provide an aspirator capable of increasing the amount of aspirated secondary air and improving performance and to provide a vehicle air conditioner using the same. The aspirator includes a nozzle 15 that aspirates secondary air; a main body 17 that forms a scroll-shaped airflow path 16 on the outer circumference of the nozzle 15; a primary-air inflow path 18 that tangentially communicates with the airflow path 16; and a diffuser that is connected to an open end of the main body 17 and has a throat portion at which a tip portion of the nozzle 15 is disposed. An inner wall 18A of the primary-air inflow path 18, which communicates with the scroll-shaped airflow path 16, is offset outward from the center of the nozzle 15, and primary air introduced from the primary-air inflow path 18 flows into the scroll-shaped airflow path 16 from one direction.

Description

technical field [0001] The present invention relates to an aspirator suitable for use in a vehicle air conditioner and a vehicle air conditioner using the aspirator. Background technique [0002] In an air conditioner for a vehicle, an aspirator (Aspirator) that uses a fluid to create a decompressed state by the Venturi effect is used in order to guide the air in the vehicle interior to the installation portion of the temperature sensor that detects the temperature in the vehicle interior. An aspirator generally includes: a nozzle for sucking secondary air, which is the air in the vehicle interior, to the installation portion of the temperature sensor in the vehicle interior; a main body that forms an air flow path around the nozzle to surround the nozzle; A primary air inflow path that communicates with the air flow path, and allows a part of the air flow to flow in from the air conditioning unit side; a diffuser connected to the open end side of the main body, and the fron...

AI Technical Summary

Problems solved by technology

However, when only the center line of the primary air inflow path is arranged eccentrically with respect to the central axis of the main body, the primary air taken into the main body from the primary air inflow path flows into the cylindrical nozzle formed around the nozzle from left and right. air flow path, so collide midway

Therefore, there is a problem that swirling flow cannot be given sufficiently, and the effect is halved.

In particular, when the aspirator is shared between the right-hand steering vehicle and the left-hand steering vehicle, since the inflow direction of the primary air is different, there is a tendency for the reverse flow in the air flow path to become significant.

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