Refrigeration Machine Capillary Inlet Design to Reduce Dead Volume
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Solution Overview
Problem
Conventional refrigeration machines have inefficiencies due to the capillary's limited ability to remove refrigerant from the dryer, leading to variations in refrigerant circulation and potential damage to moisture-binding materials, affecting cooling capacity and circulation.
Innovation Solution
The capillary is designed to rise from the inlet end, reducing the dead volume of non-circulating refrigerant, with additional evacuation connections and adaptive nozzle shapes to ensure complete evacuation and minimize refrigerant trapped in the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the capillary dips deep into the dryer housing to remove more refrigerant, then the refrigerant removal efficiency is improved, but the risk of damaging the moisture-binding material increases
Solution Approach 1:
The patent introduces a screen as an intermediary element between the capillary inlet and the moisture-binding material. This screen allows the capillary to extend deeper into the dryer housing for improved refrigerant removal while preventing direct contact with and potential damage to the moisture-binding material. The screen acts as a mediator that permits refrigerant flow while protecting the delicate material.
Solution Approach 2:
The screen is installed in advance to establish a protective barrier before the capillary is positioned. This preliminary action ensures that when the capillary is inserted to optimize refrigerant removal, the moisture-binding material is already protected from potential damage.
2Productivity
If the capillary dips deep into the dryer housing to remove more refrigerant, then the refrigerant removal efficiency is improved, but the capillary may block the inlet of the capillary itself
Solution Approach 1:
The screen serves as a mediator that prevents the capillary inlet from being blocked by the moisture-binding material. It allows refrigerant to pass through to the capillary while preventing the capillary inlet from becoming obstructed, thus maintaining ease of operation and refrigerant circulation.
3Reliability
If the capillary inlet end is positioned higher in the dryer housing, then the risk of damaging the moisture-binding material is reduced, but the amount of non-circulating refrigerant trapped in the dryer increases
Solution Approach 1:
The screen enables the capillary to extend lower into the dryer housing without directly contacting the moisture-binding material. This intermediary structure allows the capillary inlet to be positioned at an optimal lower level for refrigerant removal while the screen prevents damage to the moisture-binding material, thus resolving the contradiction.
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 design reduces the amount of refrigerant needed, stabilizes cooling capacity, and prevents damage to moisture-binding materials, resulting in more consistent and efficient refrigerant circulation.
Implementation Method 1
the capillary is designed to rise from the inlet end, reducing the dead volume of non-circulating refrigerant
Implementation Method 2
a moisture-binding material is accommodated so that the circulated refrigerant flows through it and the refrigerant remaining in the refrigerant circuit during evacuation and disconnection is removed from the refrigerant entrained moisture binds
Data Source
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AI summary
The invention relates to a refrigeration machine, in particular for a domestic refrigeration device, comprising a coolant circuit having a high-pressure section and a low-pressure section, which are connected to one another at two transition points. The first transition point is formed by a compressor (2) and the second transition point by a capillary tube (8). The high-pressure section has a chamber (14) from which an evacuation connector (18) leads away in a downward direction. The capillary tube (8) engages into the evacuation connector (18) in an ascending orientation starting from an inlet end (19) of the capillary tube (8).