Ink Cartridge Filter Clogging Detection via Pump Load
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Solution Overview
Problem
Ink jet printers face challenges in managing filter clogging, as existing systems require manual monitoring of filter states, which can lead to inefficiencies and potential printer issues due to foreign matter ingress during ink replenishment.
Innovation Solution
A liquid ejecting apparatus with a state estimation portion that monitors the filter's clogging state by comparing the liquid amount supplied through the filter with a threshold value and the pump's load, providing notifications for filter management, including limiting ink replenishment and recommending filter replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is provided to remove foreign matters from ink during replenishment, then the reliability of the liquid ejecting apparatus is improved, but the device complexity increases due to the need to manage filter clogging state
Solution Approach 1:
The filter management system performs self-monitoring by automatically detecting its own clogging state through pump load detection. The control unit monitors the load on the pump that supplies ink through the filter, and when the load exceeds a threshold indicating clogging, the system automatically generates a replacement notification without requiring manual inspection or complex external monitoring systems.
Solution Approach 2:
The system monitors changes in pump load parameters to detect filter clogging state. By tracking the electrical current or power consumption of the pump motor, the system can infer the clogging degree of the filter based on the increased resistance to ink flow, converting a physical clogging state into an measurable electrical parameter change.
2Reliability
If manual monitoring of filter state is implemented, then the harmful effects of filter failure are reduced, but the ease of operation deteriorates due to management burden
Solution Approach 1:
The system implements automatic feedback monitoring where the control unit continuously detects pump load and compares it against threshold values. When the pump load indicates filter clogging, the system automatically provides feedback through replacement notifications, eliminating the need for manual monitoring while ensuring timely filter replacement to prevent failure.
3Adaptability or versatility
If the storage medium stores information until liquid volume of two times storage chamber volume is supplied, then the adaptability of the cartridge is improved for multi-apparatus use, but the loss of information increases if the storage capacity is exceeded
Solution Approach 1:
The storage medium is pre-configured with sufficient capacity to store filter state information for at least two times the storage chamber volume, anticipating future ink replenishments. This preliminary allocation of storage space ensures the cartridge can be transferred between apparatuses and continue tracking filter usage without data loss, maintaining adaptability across different printing systems.
Data Source
AI summary
An ink jet printer includes an ink cartridge that has a storage chamber for storing ink and enables the storage chamber to be replenished with the ink, a print head that ejects the ink supplied from the storage chamber via a filter, a state estimation portion that estimates a state of the filter, and a notification portion that performs notification, wherein the notification portion performs different notification in accordance with an estimated state by the state estimation portion.