Swash Plate Compressor Suction Pulsation Damper
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Solution Overview
Problem
Existing suction pulsation reduction apparatuses for swash plate type compressors require separate metal parts for assembly, increasing manufacturing costs and complexity, and do not effectively prevent rotation during coolant suction.
Innovation Solution
A suction pulsation reduction apparatus with all parts, including a case and core, integrally formed using plastic injection molding, featuring a latching portion and hook structures to limit the core's movement and prevent rotation, simplifying assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If separate metal parts are used for the case and cover in the suction pulsation reduction apparatus, then the structural strength and durability are improved, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent integrates the case and cover into a single integrated case structure. The case includes a body portion forming the main chamber and a closed end portion that replaces the separate cover, eliminating the need for separate metal parts while maintaining structural integrity through the unified plastic injection-molded design.
Solution Approach 2:
The integrated case serves multiple functions simultaneously: it provides the main chamber structure, acts as the closed end, supports the core portion movement, and includes the axial groove for flow control. This multi-functional design eliminates the need for separate cover and support structures.
2Strength
If separate metal parts are used for the case and cover, then the structural integrity is improved, but the manufacturing cost increases
Solution Approach 1:
The case and cover are merged into a single integrated case that is injection-molded as one piece. This eliminates the need for separate manufacturing processes and assembly operations, significantly reducing manufacturing costs while maintaining structural integrity through the unified design.
Solution Approach 2:
The patent changes the material parameter from metal to plastic and the manufacturing process parameter from separate machining and assembly to single-step injection molding. This parameter change reduces manufacturing cost while the integrated design maintains structural integrity.
3Ease of operation
If the core portion is allowed to move freely, then the valve can respond to pressure changes, but rotation during coolant suction occurs causing instability
Solution Approach 1:
The patent introduces asymmetric features: the core portion has an asymmetric cross-sectional shape that fits into the case, and the axial groove is positioned asymmetrically. This asymmetric design allows the core to move linearly in response to pressure changes while preventing rotational movement, ensuring operational stability.
Solution Approach 2:
The case includes a pre-formed axial groove and asymmetric structural features that constrain the core portion's movement path before operation begins. This preliminary constraint design ensures that the core can respond to pressure changes linearly without rotating during coolant suction.
4Object-affected harmful factors
If an opening/closing valve is added to control suction flow, then pulsation and noise are reduced, but the device complexity increases
Solution Approach 1:
The core portion serves multiple functions: it acts as the opening/closing valve to control suction flow, provides the axial groove for flow regulation, and serves as the moving element constrained by the case structure. This multi-functionality reduces overall device complexity while maintaining pulsation and noise reduction capabilities.
Solution Approach 2:
The valve function, flow control groove, and moving element are merged into a single integrated core portion design. This consolidation eliminates the need for separate valve components while maintaining the ability to reduce pulsation and noise through controlled suction flow.
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 integrated design simplifies the structure, reduces assembly and manufacturing costs, and effectively prevents rotation during coolant suction by using plastic injection molding and hook mechanisms, enhancing the apparatus's functionality and efficiency.
Implementation Method 1
an elastic spring (300) inserted into the case (100) and seated on the other side surface of the case (100) to elastically support the core portion (200)
Implementation Method 2
a core portion (200) moving in a longitudinal direction in the case (100) according to the suction pressure of the coolant introduced from the inlet (110) to control an opening/closing area of the inlet (110)
Data Source
AI summary
The present invention relates to a suction pulsation reducing device of a swash plate type compressor, and more particularly, to a suction pulsation reduction apparatus provided on a suction channel formed in a rear head of a swash plate type compressor, in which a moving range of a core portion is limited and all parts to be mounted on a suction channel are integrally formed in a case.