Junction Module for Electrical Isolation in Liquid Jetting Apparatus
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Solution Overview
Problem
Existing liquid jetting apparatuses, such as inkjet printers, face issues with electrical interference between controllers and memory devices within liquid containers, leading to potential damage or malfunction due to unwanted voltage effects during processes like ink level detection.
Innovation Solution
The apparatus incorporates a junction module that electrically disconnects and reconnects lines to isolate potential voltage effects, using drivers to stabilize voltage and detect undesired voltages, thereby reducing interference and protecting the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the controller directly controls the sensor through interconnections, then the control process is simple and direct, but electrical fluctuations and unwanted voltage effects can damage the memory devices or cause malfunction
Solution Approach 1:
The patent introduces a junction module as an intermediary component between the controller and the memory device. This junction module includes a junction circuit that can selectively connect or disconnect the first line (connecting to the sensor) from the second line (connecting to the memory device). By placing this intermediary component in the signal path, the controller can control the sensor without directly exposing the memory device to electrical fluctuations, thus resolving the contradiction between simple control structure and protection against electrical interference.
Solution Approach 2:
The patent segments the electrical connection path into separate lines: a first line connecting the controller to the sensor, and a second line connecting the controller to the memory device. The junction module provides selective switching between these segmented paths. This segmentation allows the controller to independently control the sensor through the first line while protecting the memory device on the second line from electrical interference, thereby maintaining both control simplicity and reliability.
2Reliability
If the first line remains continuously connected to the second line, then communication between the controller and memory device is always available, but electrical effects from sensor control can propagate to the memory device
Solution Approach 1:
The patent transforms the static continuous connection between the first line and second line into a dynamic controllable connection through the junction module. The junction circuit can switch between connecting the first line to the second line and disconnecting them based on operational requirements. This dynamic capability allows the system to maintain communication availability when needed while blocking electrical interference when the sensor control is active, thus resolving the contradiction between continuous communication and interference protection.
Solution Approach 2:
The junction module serves as a dynamic intermediary that controls the connection state between the first line (sensor control path) and the second line (memory device path). When the junction circuit disconnects the first line from the second line during sensor control operations, it prevents electrical effects from propagating to the memory device while maintaining the ability to reconnect for communication purposes, thus addressing both communication availability and interference protection.
3Device complexity
If no electrical isolation is implemented, then the system structure remains simple, but voltage fluctuations during sensor control can cause damage to the liquid jetting apparatus
Solution Approach 1:
The junction module acts as a protective intermediary that selectively blocks the propagation of voltage fluctuations from the first line (sensor control) to the second line (memory device). By incorporating this intermediate component with selective switching capability, the system achieves electrical isolation during critical operations without requiring complete system redesign, thus resolving the contradiction between structural simplicity and damage protection.
Solution Approach 2:
The patent extracts the harmful electrical effects from the main signal path by introducing the junction module that can disconnect the first line from the second line. This extraction mechanism separates the sensor control function from the memory device protection, allowing voltage fluctuations to be contained within the first line segment while preventing them from reaching the memory device, thereby achieving protection with minimal added complexity.
Data Source
AI summary
A liquid jetting apparatus to which a liquid container is attached, the container containing a liquid and having a first device, includes a first line, a second line, a first controller and a second controller. The first controller is to be electrically connected to the first device via the first line. The second controller is to be electrically connected to the first controller via the second line. The first controller includes a processor and a junction module. The processor, in a first instance, executes a prescribed process in relation to the liquid container in response to a signal received from the second controller via the second line. The junction module, in the first instance, puts the first line and the second line into mutually electrically disconnected state and, in a second instance different from the first instance, puts the first line and the second line into mutually electrically connected state make the second controller capable with the first device.