Automatic Depressurizing Pump for Electronic Sphygmomanometers
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Solution Overview
Problem
Conventional pumps require additional components like solenoid valves for automatic depressurization, increasing costs and complexity, particularly in applications like electronic sphygmomanometers where quick pressure release is necessary.
Innovation Solution
An automatic depressurizing pump design incorporating an air-generating unit and an airflow control unit with a pressure chamber and resilient member, which seals and unseals a depressurization opening to rapidly control airflow, eliminating the need for solenoid valves by using a piston and valve system to manage pressure and depressurization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a solenoid valve is combined with the pump for automatic depressurization, then the depressurization function is achieved, but the cost and device complexity increase
Solution Approach 1:
The patent merges the depressurization function into the pump structure itself by integrating a pressure chamber and resilient member that automatically opens a depressurization opening when pressure is released. This eliminates the need for a separate solenoid valve, reducing device complexity while maintaining automatic depressurization capability.
Solution Approach 2:
The pump structure is designed to perform both pressurization and depressurization functions. The pressure chamber and resilient member enable the same device to automatically depressurize after pressurization, making the pump multi-functional and eliminating the need for additional specialized components like solenoid valves.
2Extent of automation
If a solenoid valve is used for depressurization, then the depressurization function is achieved, but the cost increases
Solution Approach 1:
The patent merges the depressurization function into the pump structure itself by integrating a pressure chamber and resilient member that automatically opens a depressurization opening when pressure is released. This eliminates the need for a separate solenoid valve, reducing device complexity while maintaining automatic depressurization capability.
Solution Approach 2:
The patent extracts and eliminates the solenoid valve component from the system by designing an alternative mechanism using the pump's own structure (pressure chamber, resilient member, and depressurization opening) to achieve automatic depressurization, thereby reducing cost.
3Device complexity
If the depressurization opening is always open, then the structure is simple, but the pressure control precision deteriorates
Solution Approach 1:
The depressurization opening is designed to be dynamically controllable through the resilient member that responds to pressure changes. The opening is sealed during pressurization and automatically opens during depressurization, providing dynamic pressure control while maintaining structural simplicity.
Solution Approach 2:
The resilient member automatically seals and opens the depressurization opening based on pressure differential without external control. The system self-regulates pressure control by using the pressure itself to activate the sealing and unsealing of the depressurization opening.
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
Enables quick and effective depressurization within 2 seconds, reducing costs and extending the lifespan of devices like electronic sphygmomanometers by integrating the depressurizing function without additional components, and can be adapted for various applications requiring pressure release.
Implementation Method 1
The resilient member includes a second air output hole and a depressurization valve. The second air output hole is communicated with the air output chamber, and the depressurization valve hermetically covers on the pressure chamber
Implementation Method 2
The air-generating unit has a first air intake hole. An air generated by the air-generating unit drives the air control unit so as to inhale or exhale airflows through the first air intake hole
Implementation Method 3
When the air-generating unit stops driving the airflow control unit, the pressure chamber leaks the air, so that the depressurization valve is recessed to form a first depressurization opening to be communicated with the air output chamber and the first depressurization opening
Data Source
AI summary
An automatic depressurizing pump includes an air-generating unit and an airflow control unit. The air-generating unit has a first air intake hole. An air generated by the air-generating unit drives the air control unit so as to inhale or exhale airflows through the first air intake hole. The airflow control unit includes a valve base, a first valve, a second valve, a top cover, and a resilient member. The valve base includes an air output chamber and a pressure chamber. The resilient member includes a second air output hole and a depressurization valve. The second air output hole is communicated with the top of the air output chamber, and the depressurization valve hermetically covers on and fixes to the top of the pressure chamber.