Rail Cab Air Distribution Box for Temperature Homogeneity
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Solution Overview
Problem
Existing air conditioning devices for driver's cabs often result in uncomfortable temperature distribution and significant temperature differences between areas, leading to discomfort for users.
Innovation Solution
An air conditioning device with a distribution box that directs conditioned air towards the side walls and rear of the cabin, using convection rollers to homogenize air temperature through specific air flow orientations, ensuring even temperature distribution and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conditioned air is blown directly towards the user through the air outlet oriented towards the seat, then the air conditioning device can effectively cool or heat the user's area, but this creates discomfort for the user and results in non-homogeneous temperature distribution in the cabin
Solution Approach 1:
The air outlet is divided into multiple independent outlets (first air outlet, second air outlet, third air outlet) positioned at different locations and orientations. This segmentation allows conditioned air to be distributed to different areas of the cabin simultaneously, creating convection rollers that mix air throughout the space, thereby achieving homogeneous temperature distribution without directing air directly at the user's face
Solution Approach 2:
Different air outlets are oriented in different directions to serve different local areas of the cabin. The first air outlet blows air towards the rear, the second towards the side wall, and the third towards the front, creating localized air movements that collectively achieve uniform temperature distribution throughout the entire cabin space
2Ease of operation
If the air outlet is oriented towards the seat to provide direct air conditioning to the user, then the user's area is effectively conditioned, but significant temperature differences occur between the first cabin area (where conditioned air is blown) and the second cabin area (where conditioned air is not blown)
Solution Approach 1:
Instead of directing air conditioning effect only in one dimension (towards the user's seat), the invention distributes air outlets in multiple spatial dimensions - rearward, lateral, and forward directions. This multi-dimensional air distribution creates convection rollers that circulate air throughout the entire cabin volume, eliminating temperature differences between different cabin areas while maintaining effective air conditioning
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively mixes air in the cabin, standardizing temperature and reducing user discomfort by utilizing convection rollers generated by side and rear air outlets, optimizing air movement and temperature homogeneity.
Implementation Method 1
The side air outlets are intended to diffuse conditioned air towards the side walls of the cabin, generally side windows, thus generating, on either side of the cabin, convection rollers which ensure overall mixing air in the cabin, thus making it possible to homogenize the air temperature in the cabin.
Data Source
Figure 1
AI summary
The air conditioning unit (10) includes a heat exchanger (12) for exchanging heat with air circulating within the air conditioning unit (10), and an air distribution box (14) extending in a longitudinal direction (X) between a front portion (14A) and a rear portion (14B), and in a transverse direction between two lateral portions (14C). The distribution box is fixed to a ceiling (5) of the driver's cab (1), and comprises: in its front portion (14A), a front air inlet (16) from the cab (1), connected upstream of the heat exchanger (12), and in each of its lateral portions (14C), a respective lateral outlet (18) of conditioned air, connected downstream of the heat exchanger (12).