Air Conditioning Condensate Drainage via Suction Pipe
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Solution Overview
Problem
Current air conditioning systems in agricultural machines face challenges in efficiently draining condensate due to underpressure issues, which can lead to accumulation and blockages, especially when drain pipes are not connected at the bottom but rather at the side of the housing, increasing the risk of condensate accumulation and visibility problems.
Innovation Solution
The system incorporates a condensate drain unit with T-junctions and supplementary pipe elements that connect drain pipes to upright profiles, ensuring permanent suction of condensate from the drain pipes, particularly when installed at a slight downward slope, and integrates a reservoir into the air conditioning unit housing for effective condensate management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If drain pipes are connected to the side of the housing instead of the bottom, then installation flexibility is improved, but condensate accumulation and blockage risk increase due to underpressure and gravity effects
Solution Approach 1:
The patent applies pneumatic principles by utilizing the underpressure generated by the blower to create suction that actively draws condensate through the drain pipes. The supplementary drain pipe connects to the blower inlet, allowing the pressure differential to overcome gravity and ensure reliable drainage even when pipes are connected to the side of the housing rather than the bottom.
2Productivity
If underpressure is created at the blower suction side, then air circulation is improved, but condensate drainage is hampered and dust particles are drawn into drain pipes causing blockages
Solution Approach 1:
The patent extracts the drainage function from the main air circulation path by providing a separate supplementary drain pipe that connects to the blower inlet. This allows condensate to be removed through a dedicated channel while the main air circulation continues uninterrupted, preventing dust and water mixture blockages in the primary drainage path.
Solution Approach 2:
The supplementary drain pipe acts as an intermediary element that mediates between the underpressure zone at the blower inlet and the condensate collection point. It provides a controlled pathway for condensate removal that leverages the existing pressure differential without disrupting the main air flow or introducing dust particles into the drainage system.
3Reliability
If a supplementary drain is provided besides normal drain pipes, then drainage reliability is improved, but device complexity increases
Solution Approach 1:
The supplementary drain pipe serves multiple functions: it acts as a backup drainage path when the primary drain is blocked, provides active suction-enhanced drainage under normal conditions, and prevents condensate accumulation in the housing. This multi-functionality justifies the additional component by providing several benefits beyond simple redundancy.
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 reduces the risk of water accumulation in the reservoir and drain pipes, maintaining clear visibility by ensuring efficient drainage and minimizing the need for a central overflow drain, even under varying machine slopes or orientations.
Implementation Method 1
a blower for generating a reduced pressure in the air conditioning unit and for supplying conditioned air to the cab
Implementation Method 2
The supplementary pipe element provides for a permanent suction of the condensate from the drain pipe
Implementation Method 3
The outlet end of each supplementary pipe element is located at the suction side of the blower
Data Source
AI summary
The invention relates to an air conditioning system for a cab of an agricultural machine, comprising:an air conditioning unit that comprises an evaporator (23), a blower (25) for generating a reduced pressure in the air conditioning unit and supplying the conditioned air into the cab,a condensate drain unite that comprises a reservoir (6) to which one or more drain pipes (7a, 7b) are connected, which lead to drain pipes (8a, 8b) that can be mounted in upright profile posts of the cab,characterized in that the system further comprises one or more T-junctions (11a, 11b) or similar connection elements, and one or more supplementary pipe elements (10a, 10b), wherein each of the drain pipes (7a, 7b) is connected to an upright drain pipe (8a, 8b) via two branches of a T-junction (11a, 11b), wherein the inlet end of a supplementary pipe element (10a, 10b) is mounted onto the third branch of the T-junction and wherein the outlet end (12a, 12b) of each supplementary pipe element (10a, 10b) is located at the suction side of the blower.