Stacked Parallel-Serial Compressor with Slide Piece Control
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Solution Overview
Problem
Rolling rotor type double-stage compressors face limitations in displacement, requiring electric auxiliary heating under low-temperature conditions and increasing size and cost when displacement is increased, and struggle to operate effectively across varying volume ratios during refrigeration and refrigeration conditions.
Innovation Solution
A multi-cylinder double-stage compressor design with primary and secondary cylinders, a lower flange, and slide piece control devices allows for multiple operational modes, enabling variable volume ratios and unloading states to enhance heating capability and energy efficiency across different conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the displacement of the compressor is increased to improve heating capacity under low-temperature conditions, then the heating capability is improved, but the size of the compressor increases and the cost increases
Solution Approach 1:
The compressor is divided into multiple cylinders (first cylinder, second cylinder, third cylinder, fourth cylinder) with independent compression mechanisms. Each cylinder can operate semi-independently, allowing the system to achieve large total displacement without requiring a single oversized compressor unit, thus improving heating capacity while controlling size
Solution Approach 2:
The compressor employs dynamic displacement control through slide pieces that can adjust the effective compression volume of each cylinder. This allows the compressor to vary its total displacement dynamically based on operating conditions, enabling high heating capacity when needed while maintaining a compact physical size
2Power
If the displacement of the compressor is increased to improve heating capacity, then the heating capability is improved, but the cost increases
Solution Approach 1:
The compressor uses multiple standardized cylinders with identical or similar structural designs. This modular segmentation allows for economies of scale in manufacturing, reducing the cost per unit of displacement compared to a single large compressor, while still achieving the required heating capacity
Solution Approach 2:
The dynamic displacement control mechanism using slide pieces allows the compressor to operate efficiently across a wide range of conditions without requiring multiple fixed-displacement compressors. This reduces the need for oversized components and enables more cost-effective sizing
3Productivity
If the compressor operates with large displacement and low volume ratio under refrigeration conditions, then the refrigeration capacity is improved, but the compressor cannot operate with high volume ratio under refrigeration conditions
Solution Approach 1:
The slide pieces in each cylinder can dynamically adjust the compression volume, enabling the compressor to vary its volume ratio according to operating conditions. Under refrigeration conditions, the compressor can achieve both large displacement (for high capacity) and high volume ratio (for efficient compression) by adjusting the slide piece positions, eliminating the limitation of fixed operation modes
Solution Approach 2:
The compressor is designed to perform multiple functions across different operating modes. The same compressor unit can efficiently handle both refrigeration conditions (requiring large displacement) and heating conditions (requiring high volume ratio), as well as intermediate conditions, through dynamic adjustment of the slide pieces. This multi-functionality eliminates the need for separate compressors for different applications
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 compressor can operate in multiple modes to improve heating capacity and energy efficiency, reducing size and cost by allowing variable displacement and meeting energy requirements under different conditions, such as increased heating capacity in low-temperature situations and improved efficiency at rated and intermediate points.
Implementation Method 1
a slide piece control device configured to control a slide piece to act
Implementation Method 2
a refrigerant entering the first air entry and the second air entry is discharged from the air outlet after primary or/and secondary compression
Implementation Method 3
double-stage enthalpy-enhanced compressor
Data Source
AI summary
The invention discloses a compressor. The compressor includes a first primary cylinder, a second primary cylinder and a secondary cylinder, which are stacked, a separator is provided between two adjacent cylinders. The first primary cylinder is provided with a first air entry, the second primary cylinder is provided with a second air entry, and the secondary cylinder is provided with an air outlet. The first primary cylinder and the second primary cylinder are connected in serial to the secondary cylinder after being connected in parallel. A refrigerant entering the first air entry and the second air entry is discharged from the air outlet after primary or/and secondary compression. The two separators are divided into a first separator and a second separator. Any one or two of the first separator, the second separator and a lower flange may be provided with a slide piece control device.