Compressor and cooling system

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Solution Overview

Problem

Existing refrigeration systems face issues with clogged refrigerant lines due to scale buildup, leading to reduced heat exchange efficiency and potential system failures, often requiring manual maintenance that is frequently overlooked until problems arise.

Innovation Solution

A compressor with a switchable operation mode for the cooling liquid flow direction in the heat exchanger, allowing for automatic reversal of cooling water flow to effectively remove scale buildup and prevent clogging, thereby maintaining heat exchange efficiency and preventing system failures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual cleaning or maintenance of the refrigerant line is recommended, then the heat exchange capability can be restored, but the system is often left unmaintained until the refrigerator line is blocked causing trouble

Engineering Contradiction:
Improveheat exchange capabilityVSAvoidmaintenance operation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system performs automatic reverse cleaning of the heat exchanger without requiring manual intervention. The control unit automatically switches the cooling water flow direction to clean the heat exchanger, eliminating the need for users to perform manual maintenance while ensuring the heat exchange capability is restored when needed

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The control unit switches the cooling water flow direction periodically or based on predetermined conditions to clean the heat exchanger. This periodic automatic cleaning ensures the heat exchange capability is maintained without requiring continuous manual attention or intervention

Inventive Principle:
Principle #19Periodic action

2Reliability

If the cooling liquid flow direction is reversed for cleaning, then scale buildup is removed and heat exchange efficiency is maintained, but the system complexity increases with additional valves and control mechanisms

Engineering Contradiction:
Improveheat exchange efficiencyVSAvoidflow direction control system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The cooling water inlet port and outlet port serve dual functions: they are used for normal cooling operation and for reverse cleaning operation. The same ports and piping structure are utilized for both cooling and cleaning purposes, reducing the need for additional dedicated cleaning ports or complex piping systems

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control unit acts as an intermediary that manages the switching of cooling water flow direction between normal cooling mode and reverse cleaning mode. This centralized control mechanism coordinates the opening and closing of valves to achieve flow reversal without requiring complex distributed control systems

Inventive Principle:
Principle #24Intermediary (Mediator)

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 automatic reversal of cooling water flow direction in the compressor effectively mitigates scale buildup and clogging, ensuring stable operation of the refrigeration system by automating the cleaning process and reducing downtime, thus maintaining heat exchange efficiency and preventing system failures.

Implementation Method 1

a heat exchanger configured to discharge heat generated during compression outside the compressor

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

cooling liquid flowing from outside the compressor into the compressor passes

Methodology Applied
Scientific EffectConvection: Convection

Data Source

PatentUS9683763B2Compressor and cooling system
Publication Date: 2017.06.20 SUMITOMO HEAVY IND LTD
  • US9683763B2 patent drawing
  • US9683763B2 patent drawing
  • US9683763B2 patent drawing

AI summary

A compressor includes: a heat exchanger configured to discharge heat generated during compression outside the compressor; a cooling liquid inlet port through which cooling liquid flowing from outside the compressor into the compressor passes; and a cooling liquid outlet port through which the cooling liquid flowing out of the compressor from inside the compressor passes. The compressor is configured such that an operation mode is switchable between a first mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a predetermined first direction and passes through the cooling liquid outlet port, and a second mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a second direction opposite to the first direction and passes through the cooling liquid outlet port.