Weighing Device Gas Flow Moisture Control
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Solution Overview
Problem
Weighing devices face issues with moisture penetration during cleaning, leading to measuring errors and potential damage, despite pressure-tight sealing, as humidity can still enter the weighing cell and control cabinet.
Innovation Solution
A weighing device design that allows a controlled gas flow through the weighing cell housing and control cabinet during cleaning and operation to remove moisture, using a gastight system with a gas pressure connection for compressed air, ensuring the air stream absorbs moisture and maintains a dry environment without significant pressure increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure-tight sealing is used to prevent moisture penetration, then protection against moisture is improved, but complete prevention of humidity penetration is not achieved and cleaning operations become restricted
Solution Approach 1:
The patent extracts the moisture prevention function from the sealing structure and implements it through an active gas flow system. A gas supply device introduces dry gas into the housing interior, and gas guide channels direct the flow to actively remove moisture from critical areas like the weighing cell and control cabinet, separating the protection function from the sealing structure itself
Solution Approach 2:
The system performs preliminary action by continuously supplying dry gas to the housing interior before moisture can accumulate or cause damage. The gas flow is maintained in advance to prevent moisture penetration during cleaning operations, rather than reacting to moisture after it enters
2Reliability
If gas flow is used to remove moisture from internal spaces, then drying effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent uses flexible gas-permeable membranes as sealing elements that allow controlled gas flow while maintaining separation between interior and exterior environments. These thin film structures enable moisture removal through controlled permeation without requiring complex mechanical sealing systems
Solution Approach 2:
Dry gas acts as an intermediary substance that mediates between the external environment and the sensitive internal components. The gas flow system uses this intermediary to transfer moisture removal capability from the exterior to the interior spaces, protecting weighing and control components without direct contact
3Reliability
If sealed housing is used to protect internal components, then protection against environmental influences is improved, but moisture can still penetrate and cause measuring errors
Solution Approach 1:
The system maintains continuous gas flow through the housing interior to continuously remove moisture before it can reach the weighing cell. This continuous protective action ensures that moisture removal is an ongoing process rather than a periodic intervention, maintaining measurement precision throughout operation
Solution Approach 2:
The patent applies pneumatic principles by using pressurized dry gas flow to actively manage the internal atmosphere. The gas pressure and flow rate are controlled to create a protective pneumatic barrier that prevents moisture from reaching sensitive components while maintaining the sealed housing structure
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
Effectively prevents moisture penetration and maintains a dry status within the device, reducing the risk of errors and damage, while allowing for efficient drying and dehumidification of internal spaces.
Implementation Method 1
the introduced gas, in particular air, can have a correspondingly small moisture content and/or an increased temperature, so that the gas can absorb at least additional moisture
Implementation Method 2
the gas can absorb at least additional moisture
Data Source
AI summary
A weighing device includes at least one weighing cell (3) disposed in a weighing cell housing (5) and a control cabinet (1). The control cabinet (1) includes a gas pressure control (7) to which can be connected a source with gas overpressure (9). The control cabinet (1) includes an outlet opening (11) through which the gas can exit. The control cabinet (1) is connected with the weighing cell housing (5) through a first connection (13) for supplying gas into the weighing cell housing (5), and through a second connection (15) for gas removal from the weighing cell housing (5). The gas pressure connection (7) is connected with the first connection (13) through a flow guide means (17), so that at least one part of a supplied gas first flows through an interior of the weighing cell housing and subsequently it exits through the outlet opening (11) of the control cabinet (1).