Vacuum Pumping Device with Pressure Valve Linkage Switch
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Solution Overview
Problem
Existing storage tanks fail to maintain a vacuum state over time due to poor sealing, allowing air to re-enter and compromising the freshness of stored food.
Innovation Solution
A vacuum-pumping device with a pressure valve and linkage switch that automatically controls the air pumping assembly based on air pressure, ensuring a long-term vacuum state by starting and stopping the pump when air enters or leaves the tank, combined with a seal ring and air exhaust valve for efficient sealing and air management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vacuum-pumping machine is used to remove air from the storage tank, then the fresh keeping effect is improved, but air re-enters the tank over time due to poor sealing, destroying the vacuum state
Solution Approach 1:
The patent transforms the static sealing system into a dynamic one by introducing a sealing ball that moves vertically within the sealing cavity. When air pressure increases (air re-entry detected), the sealing ball is pushed upward to close the air inlet passage, automatically responding to pressure changes and maintaining vacuum without manual intervention
Solution Approach 2:
The sealing mechanism operates autonomously using the air pressure differential itself as the actuating force. The increased air pressure automatically pushes the sealing ball to block the passage, creating a self-regulating system that requires no external power or control system
2Duration of action of stationary object
If manual vacuum-pumping is performed, then initial vacuum is achieved, but continuous monitoring and operation are required to maintain the vacuum state
Solution Approach 1:
The patent implements a passive feedback mechanism where the air pressure inside the tank directly controls the sealing ball position. When air re-enters and pressure increases, the ball moves to close the passage, creating automatic feedback control that maintains vacuum state without external monitoring
Solution Approach 2:
The sealing ball acts as an intermediary element between the air pressure environment and the air inlet passage. It translates pressure changes into mechanical action (blocking or opening the passage), serving as a simple yet effective mediator that automates the vacuum maintenance process
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
The device maintains an oxygen-free vacuum state in storage tanks, effectively prolonging the freshness of food by automatically controlling the vacuum state and preventing air re-entry, thus extending the fresh keeping period.
Implementation Method 1
a vacuum-pumping mode can be adopted, to prevent oxygen from coming into contact with food
Implementation Method 2
after vacuum-pumping is performed on the storage tank utilizing a vacuum-pumping machine
Implementation Method 3
the seal ring is fixed to the inserting part; both the electric switch key and the air exhaust valve button extend out from the top of the shell
Implementation Method 4
a first closed pipeline which is in communication with the storage tank is arranged in the shell, the pressure valve is installed in the first closed pipeline
Data Source
AI summary
The present invention specifically relates to a storage tank vacuum-pumping device and a method for keeping long-time food fresh utilizing the storage tank. The storage tank vacuum-pumping device comprises a shell, a seal ring, an air pumping assembly, an electric switch key, an air exhaust valve button, a pressure valve, a pressure valve spring and a pressure valve linkage switch, wherein the seal ring is fixed at the bottom of the shell; an air inlet pipe of the air pumping assembly is in communication with the storage tank, and the air pumping assembly is electrically connected with the electric switch key; both the electric switch key and the air exhaust valve button extend out from the top of the shell; a first closed pipeline which is in communication with the storage tank is arranged in the shell, the pressure valve is installed in the first closed pipeline, and the pressure valve spring is fixed between the first closed pipeline and the pressure valve; and the pressure valve linkage switch is aligned with the pressure valve, and the pressure valve linkage switch is connected with the electric switch key in series. In the present invention, by the automatic control of the pressure valve and the pressure valve linkage switch, the storage tank can keep a vacuum state for a long time, and then effectively keep food fresh for a long time.