Bidirectional Filter Valve Stop for Heat Pump Pressure Surges
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Solution Overview
Problem
The existing bidirectional filters in heat pump systems face issues with pressure variation of refrigerant, leading to increased flow resistance, potential blockages, and deformation of components, which can cause throttling, frosting, and partial failures.
Innovation Solution
Incorporating a protective member with a protective surface opposite to the outlet blocking piece, which restricts the displacement of the outlet blocking piece and maintains a predetermined distance between the connecting pipe and the outlet, ensuring smooth refrigerant flow and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outlet blocking piece is allowed to move freely under refrigerant pressure, then the control valve can open and close the outlet effectively, but the outlet blocking piece may move excessively under high pressure, reducing the flowing section and causing throttling and frosting
Solution Approach 1:
The protective member is pre-installed in the transitional chamber to counteract the excessive movement of the outlet blocking piece before it can cause throttling and frosting. This preliminary protective structure prevents the harmful effect by restricting the outlet blocking piece within a safe displacement range
Solution Approach 2:
The protective member acts as an intermediary element between the outlet blocking piece and the connecting pipe. It mediates the interaction by providing a protective surface that limits the outlet blocking piece's displacement, preventing direct contact that would cause throttling and frosting
2Productivity
If the outlet blocking piece moves under refrigerant pressure, then the outlet can be opened for flow, but the outlet blocking piece may deform under pressure variation, affecting sealing cooperation
Solution Approach 1:
The protective member provides beforehand cushioning by restricting the outlet blocking piece's movement range. This prevents excessive displacement that would lead to deformation and loss of sealing cooperation, ensuring reliable sealing when the valve closes
3Reliability
If the outlet blocking piece is restricted from moving, then deformation is prevented and sealing is maintained, but the outlet cannot open for refrigerant flow
Solution Approach 1:
The protective member creates a dynamic system where the outlet blocking piece can move within a controlled range to enable flow, but is restricted beyond that range to prevent deformation. This dynamic restriction allows both flow and sealing functions to be achieved
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 solution reduces the adverse effects of pressure variation on the bidirectional filter, maintaining efficient refrigerant flow and improving the reliability of the control valve component by preventing deformation and ensuring proper sealing.
Implementation Method 1
an outlet blocking piece 430 located at an outer side of the frame body 440 and capable of cooperating with the outlet 441 under the action of an elastic member 420
Implementation Method 2
a filter core 300 arranged in the filter chamber 211
Data Source
Figure 1~2
Figure 2-1~3
Figure 4~5
AI summary
A bidirectional filter and a heat pump system. The bidirectional filter comprises a housing (200) and at least two control value components (400). The two control value components (400) divide the inner chamber of the housing (200) into a filter chamber (211) and two transitional chambers (212, 213). The control value component (400) comprises a frame body (440) fixed on an inner wall of the housing (200), and an outlet blocking piece (430) fitting an outlet (441) of the frame body (440). The outlet blocking piece (430) is on an outer side of the frame body (440). The bidirectional filter further comprises a protective member (500) located in the filter chamber (211) and fixed relative to the housing (200). The protective member (500) is provided with a protective surface (501) opposite to an outer side surface of the outlet blocking piece (430). When the pressure of a refrigerant in the pipeline is too high, the protective surface (501) of the protective member (500) can limit movement of the outlet blocking piece (430), so as to prevent the flow cross-section between the filter chamber (211) and a connecting pipe (202) from being too small, and make the refrigerant pass smoothly, thereby reducing the adverse effect of the change of the pressure of the refrigerant on the bidirectional filter.