Electric Compressor Inverter Mounting for Uniform Heat Dissipation

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Solution Overview

Problem

Existing electric compressors require complex assembly processes and additional parts like bolts or clamps for pressing components, leading to uneven contact and reduced heat dissipation characteristics due to the need for threaded groove processing.

Innovation Solution

A modular design with an inverter cover, inverter body, and circuit board that uses a pressing member inserted into boss portions to press the switching elements, eliminating the need for additional parts and ensuring even contact with the motor housing, thereby improving heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If bolts or clamps are used to press electric components toward the motor housing, then the components can be secured, but the assembly process becomes complex and requires additional parts

Engineering Contradiction:

ImprovecontactabilityVSAvoidassembly process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pressing member is integrated directly into the inverter body structure, eliminating the need for separate bolts or clamps. The inverter body itself serves as the pressing mechanism, combining the mounting structure and pressing function into a single unified component.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The inverter body automatically presses the electric components against the motor housing through its own structural design, without requiring external fastening elements. The pressing action is inherent to the inverter body's configuration rather than being provided by separate fasteners.

Inventive Principle:

Principle #25Self-service

2Reliability

If threaded groove processing is performed in the motor housing, then components can be securely mounted, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvemounting securityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The pressing function is extracted from the motor housing and transferred to the inverter body. This eliminates the need for threaded groove processing in the motor housing, as the pressing action is now provided by the inverter body's integrated pressing member rather than by fasteners engaged with threaded grooves.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The mechanical fastening system (bolts, clamps, threaded grooves) is replaced by a direct structural pressing mechanism built into the inverter body. This substitution eliminates complex machining operations while maintaining secure mounting through the integrated pressing design.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If elastic members such as clamps are used to press components, then components can be secured, but even contact cannot be achieved leading to contact failure

Engineering Contradiction:

Improvecontact stabilityVSAvoidcontact uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The pressing function is divided into multiple pressing members that are distributed across the inverter body. Each pressing member independently presses specific electric components, ensuring uniform contact pressure across all components without the unevenness that occurs with single elastic members.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressing mechanism transitions from elastic deformation (clamps) to rigid structural pressing (integrated pressing members). This parameter change from elastic to rigid pressing ensures consistent and uniform contact pressure, eliminating contact failure while maintaining reliable electrical connection.

Inventive Principle:

Principle #35Parameter changes

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

Simplifies assembly, reduces material and weight, and enhances contactability between switching elements and the motor housing, improving heat dissipation characteristics without requiring additional parts or complex processing.

Implementation Method 1

a pressing member inserted into at least one among the one or more boss portions and the pressing member presses another surface which is an opposite side of the one surface of the circuit board

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

improving contactability between a switching element and a motor housing... improving heat dissipation characteristics

Methodology Applied

Scientific EffectThermal Conduction: Conduction (thermal)

Data Source

PatentUS20250350211A1Electric compressor

Publication Date: 2025.11.13 HANON SYST CO LTD

AI summary

An electric compressor, including: a housing; a compression part to compress a refrigerant introduced into the housing; a motor part provided in the housing to drive the compression part; and an inverter part provided on one side of the housing to control the motor part, the inverter part may include: an inverter cover coupled to one side of the housing; an inverter body fixed inside the inverter cover; and a circuit board seated on the inverter body and allowing one or more elements to be disposed on one surface thereof facing the housing, the inverter body may include: one or more boss portions protruding from a base surface toward the circuit board, and a pressing member may be inserted into at least one among the one or more boss portions and the pressing member presses another surface which is an opposite side of the one surface of the circuit board.