Method for blowing-in of jet-flow impact type air conditioner

Abstract

The invention belongs to the technical field of air conditioning engineering. A new method of air supply is involved. It is characterized in that: when the air-supply airflow is ejected from the tuyere, the jets collide with each other or with obstacles, consuming a part of kinetic energy and accelerating the attenuation of the jet velocity. The effect and benefit of the present invention is that when the air outlet is very close to the human body, under the premise of ensuring sufficient air supply volume, the wind speed near the human body can be reduced, thereby reducing the potential blowing sensation and improving the thermal comfort of the human body. The present invention is suitable for air-conditioning occasions with short-distance air supply and higher comfort requirements, such as station air conditioners, automobile air conditioners, etc., and can improve air supply comfort and indoor air quality.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning engineering, and relates to a method for air supply of a short-distance air conditioner. Background technique [0002] At present, air-conditioning has been widely used in every corner of the world, and it has played and will continue to play a role that cannot be ignored for the comfort and health of the human body and the rapid development of social economy. Along with the increasing use of air conditioners and the widening range, a series of problems have aroused people's attention. According to Schiller's actual survey of 10 office buildings, even if the air conditioner can maintain the indoor thermal environment within the so-called "comfort zone", at least 40% of people still feel too cold or too hot. In conjunction with the Croome and Rollason and Harris studies, it can be seen that people's complaints centered on the problem of indoor air not moving. Since the survey is based on ...

AI Technical Summary

Problems solved by technology

Through the PEM test measurement and application investigation, it is found that it can meet the thermal comfort requirements of most people, and can provide a wider adjustment range and higher comfort than traditional air conditioners. People complain that there will be a feeling of blowing under certain conditions. Through experiments, it is found that the air outlet will bring a feeling of blowing under the condition of medium air volume. Even if the area of ​​the air outlet is increased to 3 times the original size, the problem of blowing feeling still exists

Although simply increasing the area of ​​the tuyere can help reduce the blowing sensation, it will take up more work space and increase production costs

At the same time, simply increasing the tuyere, the dimensionless velocity of the jet will basically not change. If you want to reduce the blowing feeling under the condition of constant air volume, you must try to increase the velocity attenuation of the jet after leaving the tuyere.

In Johnson Control's PEM system, the jets are blown directly to the workers after the air outlet, which undoubtedly increases the potential wind feeling

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