Electric Compressor Intake-Side Wire Shielding Against Contaminants

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Solution Overview

Problem

Contaminants in the refrigerant or lubricating oil drawn in through the intake port can collide with the conducting wire of the electric motor, potentially causing scratches.

Innovation Solution

A protection member is provided to cover the part of the conducting wire that faces the intake port, preventing contaminants from directly colliding with it.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the conducting wire is exposed to the intake port, then the electric motor can operate efficiently, but contaminants in the refrigerant can collide with and scratch the conducting wire

Engineering Contradiction:

Improveintegrity of conducting wireVSAvoidcontaminant collision

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A protection member is introduced as an intermediary element between the conducting wire and the contaminants in the refrigerant. This protection member covers the conducting wire that faces the intake port, allowing the refrigerant to flow freely while preventing direct contact between contaminants and the conducting wire surface.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The protection member functions as a thin film or shell structure that covers the conducting wire. This shell allows the refrigerant to pass through the intake port while blocking contaminants from reaching the conducting wire, providing protection without significantly impeding refrigerant flow.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If a protection member is added to cover the conducting wire, then the conducting wire is protected from contaminants, but the device complexity increases

Engineering Contradiction:

Improveprotection from contaminationVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The protection member is designed to serve multiple functions: it protects the conducting wire from contaminants, maintains refrigerant flow paths, and can be integrated with existing motor components. This multi-functionality reduces the need for additional separate protection systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The protection member is combined with the motor housing or stator structure, merging the protection function into an existing component rather than adding a completely separate element. This integration minimizes the increase in device complexity while achieving the desired protection.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12404848B2Electric compressor

Publication Date: 2025.09.02 SANDEN CORP

AI summary

An electric compressor (1) includes an electric motor (5) including a stator core (51), a stator coil (52) formed by winding a conducting wire (60) around the stator core (51), and a rotor (53) attached to a rotating shaft (4), the electric motor (5) being for rotating the rotating shaft (4) via the rotor (53) through energization of the stator coil (52), a compression mechanism (3) that is driven by the rotating shaft (4) to compress a refrigerant, and a housing (2) including an intake port (21a) and a discharge port (24a), the housing (2) being for housing the rotating shaft (4), the electric motor (5), and the compression mechanism (3), where the refrigerant drawn in by the intake port (21a) is compressed by the compression mechanism (3) and discharged from the discharge port (24a). The electric compressor (1) includes a protection member (58) for covering a part (61), of the conducting wire (60), that faces the intake port (21a).