Double-Sheet Greenhouse Insulation for Efficient Air Conditioning
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Solution Overview
Problem
Conventional greenhouses for plant cultivation suffer from poor thermal insulation due to heat flow through the floor and high power consumption for air conditioning, exacerbated by the use of thick and heavy thermal insulation plates in the walls and ceiling.
Innovation Solution
A greenhouse design featuring a framework of pipes covered with a plastic sheet, incorporating a flexibly bendable heat shield sheet with metal foil on both sides, which forms a sealed inner surface for the floor, walls, and ceiling, reducing the need for thick insulation plates and enhancing thermal insulation while allowing for efficient air conditioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thick thermal insulation plates are used for wall and ceiling portions, then thermal insulation effect is improved, but weight and structural complexity increase
Solution Approach 1:
The patent uses a composite structure consisting of a plastic sheet outer surface member and a heat shield sheet inner surface member. The heat shield sheet is made by coating both sides of a sheet-shaped material with metal foil, creating a lightweight composite material that provides effective thermal insulation without the weight of traditional thick foam plates.
Solution Approach 2:
The patent replaces rigid thick thermal insulation plates with flexible thin film structures. The heat shield sheet is formed by coating both sides of a sheet-shaped material with metal foil, creating a thin, flexible insulation layer that is much lighter than conventional thick plates while maintaining effective thermal insulation performance.
2Loss of energy
If thick thermal insulation plates are used for wall and ceiling portions, then thermal insulation effect is improved, but device complexity increases
Solution Approach 1:
The patent employs a composite structure with an outer plastic sheet member and an inner heat shield sheet member. This composite approach provides effective thermal insulation through the combination of materials rather than relying on the thickness of a single material, thereby simplifying the overall structure compared to thick monolithic insulation plates.
Solution Approach 2:
The patent uses flexible thin film structures (plastic sheet outer surface member and heat shield sheet inner surface member) that can be easily installed and adapted to the greenhouse framework. This eliminates the need for complex structural support systems required by thick rigid insulation plates, reducing overall device complexity.
3Ease of manufacture
If the floor portion is a ground surface, then construction simplicity is improved, but thermal insulation effect deteriorates
Solution Approach 1:
The patent extends the use of flexible thin film heat shield sheets to the floor portion. The heat shield sheet is laid over the ground surface, creating an insulating barrier that prevents heat flow into and out of the greenhouse through the floor, while maintaining construction simplicity by using the same lightweight material as the walls and ceiling.
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 design achieves high energy efficiency in air conditioning and reduces power consumption while maintaining effective thermal insulation and insect prevention, with a lightweight and simpler configuration.
Implementation Method 1
a flexibly bendable heat shield sheet formed by coating both sides of a sheet-shaped material with metal foil
Implementation Method 2
thermal insulation can be effectively implemented between the inside of the greenhouse and the outside of the greenhouse
Data Source
AI summary
A greenhouse framework (22) is assembled out of a framework material (24) such as typical pipes and the like, and the outer periphery of the greenhouse framework (22) is covered by a sheet outer surface member (30) formed from a plastic sheet; a sheet inner surface member (32) is formed on the inner side of the greenhouse framework (22) in a manner of being spaced by intervals to a certain extent from the sheet outer surface member (30) by using a heat shield sheet such that all of a floor surface (32a), a wall surface (32b), and a ceiling surface (32c) are substantially in a sealed state; and an air conditioning device (40) is installed. Thus, a desirable thermal insulation property is achieved between the inside of the greenhouse and the outside of the greenhouse, and air conditioning can be implemented with high energy efficiency. In other words, a greenhouse for plant cultivation that has a simple configuration and can be air conditioned with high energy efficiency can be provided.