Injection Muffler with Nested Fixation to Reduce Refrigerant Pulsation
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Solution Overview
Problem
The existing muffler designs for refrigerant injection pipes in refrigeration and air-conditioning systems have weak installation strength due to mismatched diameters, leading to inadequate prevention of pulsations and potential damage or breakage of the injection pipe.
Innovation Solution
A compressor unit with an injection muffler having an inner diameter larger than both the compressor and expansion valve connecting parts, securely fixed to the compressor, to effectively mitigate pulsations caused by refrigerant flow-back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a muffler with large inner diameter and length is used to prevent pulsations, then pulsation prevention capability is improved, but installation strength becomes weak due to difficulty in stable fixation
Solution Approach 1:
The injection muffler is nested within the compressor structure, with the muffler body positioned inside the compressor housing and fixed to the compressor shell. This nesting arrangement allows the muffler to benefit from the compressor's structural strength while maintaining its pulsation damping function, resolving the contradiction between large muffler size and stable installation.
Solution Approach 2:
The patent introduces an intermediary mounting structure that connects the muffler to the compressor. This intermediary mechanism provides stable fixation points and structural support, enabling the large-diameter muffler to be securely installed without compromising its pulsation prevention capability.
2Object-affected harmful factors
If the injection pipe inner diameter is increased to reduce pulsations, then pulsation amplitude is reduced, but the pipe becomes more prone to damage or breakage due to weak fixation
Solution Approach 1:
The injection pipe is nested within the compressor structure, with the pipe fixed to the compressor shell at multiple points. This nesting arrangement provides structural support and stable fixation, allowing the pipe to maintain a larger inner diameter for reduced pulsations while preventing damage through the compressor's structural reinforcement.
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 larger inner diameter of the injection muffler significantly reduces pulsations and prevents damage or breakage of the injection pipe by enhancing the installation strength and stability of the muffler.
Implementation Method 1
an injection muffler disposed between the compressor connecting part and the expansion valve connecting part
Data Source
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AI summary
An injection pipe, which constitutes a part of a refrigerant pipe connecting a compressor and a condenser, permits a part of refrigerant flowing out of the condenser to branch off and flow into the compressor. The injection pipe includes: a compressor connecting part connected to the compressor; an expansion valve connecting part connected to an electronic expansion valve disposed between the injection pipe and the condenser; and an injection muffler disposed between the compressor connecting part and the expansion valve connecting part. The injection muffler has an inner diameter larger than an inner diameter of the compressor connecting part and an inner diameter of the expansion valve connecting part. The injection muffler is fixed to a side of the compressor.