Single-Motor Pressure Switching for Liquid Ejection Control
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Solution Overview
Problem
Existing pressure changing units for liquid ejection devices require separate motors for the pump and switching section, leading to increased size and complexity.
Innovation Solution
A pressure changing unit with a single motor driving both the pump and switching section through a transmission section that selectively transmits power based on the motor's rotation direction, allowing for efficient pressure changes in multiple connect destinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate motors are used for the pump and switching section, then the reliability of pressure control is improved, but the device size and complexity increase
Solution Approach 1:
The patent combines two separate motors (one for the pump and one for the switching section) into a single motor that drives both components. The motor outputs rotational power that is distributed to the pump and switching section through transmission elements, reducing the total number of motors from two to one while maintaining independent control capability.
Solution Approach 2:
The single motor serves multiple functions by simultaneously driving both the pump and the switching section. Through the transmission mechanism, one motor performs the work of what would traditionally require two separate motors, making the motor system universal and multi-functional.
2Device complexity
If a single motor drives both pump and switching section, then the device size is reduced, but the control precision may be compromised
Solution Approach 1:
The patent introduces transmission elements as intermediaries between the single motor and the two driven components (pump and switching section). These transmission elements act as mediators that independently transmit and control power to each component, ensuring that the single motor can precisely control both functions without direct mechanical coupling that would compromise precision.
3Adaptability or versatility
If the transmission section transmits power in both rotation directions, then the versatility of the system is improved, but the energy loss increases
Solution Approach 1:
The transmission section is designed with dynamic characteristics that allow it to adaptively transmit power based on rotation direction. The transmission elements are configured to efficiently transmit power in the forward rotation direction while minimizing energy loss, and to selectively engage or disengage for reverse rotation depending on the operational requirements of the pump versus the switching section.
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 size and complexity of the pressure changing unit while maintaining efficient pressure control, allowing for precise management of liquid flow in liquid ejection devices.
Implementation Method 1
a motor; a pump that is connected to the motor and that is driven by power of the motor
Implementation Method 2
a transmission section positioned between the motor and the switching section, wherein the transmission section is configured to, when the motor rotates in a forward direction, not transmit power from the motor to the switching section and, when the motor rotates in a reverse direction, transmit power from the motor to the switching section
Implementation Method 3
a pump that is connected to the motor and that is driven by power of the motor
Data Source
AI summary
A pressure changing unit is a pressure changing unit that changes the pressures of multiple connect destinations, the pressure changing unit includes a motor, a pump that is connected to the motor and that is driven by the power of the motor, a switching section configured to switch the connection between the plurality of connect destinations and the pump by the power of the motor, and a transmission section positioned between the motor and the switching section, wherein the transmission section is configured to, when the motor rotates in a forward direction, not transmit power from the motor to the switching section and when the motor rotates in a reverse direction, transmit power from the motor to the switching section.