Dual Blower Climate Control for Agricultural Machinery
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Solution Overview
Problem
Existing climate control systems in agricultural and construction machinery often malfunction and fail to operate within desired parameters due to inefficiencies in air intake and mixing, leading to suboptimal temperature regulation.
Innovation Solution
A climate control system with two blowers positioned at the same height, where one blower draws in fresh air and the other draws in circulating air from opposite sides, with an intermediate conduit connecting them, allowing for improved mixing and independent regulation, and featuring a compact design with blowers situated upstream of heat exchangers to enhance cooling and heating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blowers are positioned at different heights with offset rotary axes, then air intake from fresh and circulating openings is achieved, but the system becomes complex and prone to malfunction
Solution Approach 1:
The patent positions both blowers at the same height level, creating an equipotential arrangement that simplifies the air intake system. This eliminates the need for complex vertical routing and reduces pressure differential issues that arise from height differences, thereby improving reliability while reducing structural complexity.
Solution Approach 2:
The patent employs asymmetric positioning where one blower handles fresh air intake and the other handles circulating air intake, with their rotary axes oriented at different angles relative to the vehicle longitudinal axis. This asymmetric functional division simplifies the overall system architecture compared to symmetric dual-blower configurations.
2Ease of manufacture
If blowers draw in air through heat exchangers, then temperature regulation is achieved, but more expensive blowers are required
Solution Approach 1:
The patent positions the blowers upstream of the heat exchangers, allowing them to draw in ambient air before it passes through the evaporator or heater. This preliminary air intake action enables the use of standard, cost-effective blowers rather than requiring expensive high-temperature resistant blowers, while temperature regulation is subsequently achieved through the heat exchanger units.
3Temperature
If fresh air and circulating air are mixed before reaching the cab, then temperature regulation is improved, but air flow distribution becomes uneven
Solution Approach 1:
The patent segments the air handling into two independent streams: one for fresh air intake and one for circulating air intake, with each stream managed by its own blower. This segmentation allows for independent control and optimization of each air flow path, maintaining even distribution while enabling effective temperature regulation through the separate heat exchanger circuits.
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
This configuration ensures even temperature regulation, improves cooling and heating performance, and allows for the use of more cost-effective blowers by optimizing air flow and distribution, resulting in a more reliable and efficient climate control system.
Implementation Method 1
the mixed air is subsequently conducted through an evaporator
Implementation Method 2
through a heater before the mixed air reaches the main blower
Data Source
AI summary
A climate control system is provided that includes blowers, in particular in agricultural or construction machinery, having at least two blowers, at least one fresh air/circulating air conduit, at least one circulating air/intake air conduit, an evaporator and, if required, a heater, the evaporator and heater being situated on the air downstream side of the blowers, the blowers being situated at substantially the same height, viewed in a longitudinal direction of the vehicle. The first blower drawing in fresh air from at least one fresh air opening in the rear area of the vehicle, and the second blower drawing in at least circulating air from the vehicle interior from at least two circulating air openings situated on opposite sides of the vehicle, and at least one circulating air/intake air conduit running above and/or below the first blower and leading to the second blower from the circulating air opening on one side of the vehicle interior.