Electromagnetic Relay Partition Walls Prevent Contact Freezing
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Solution Overview
Problem
Existing electromagnetic relays face issues with vapor condensation and freezing at the contact parts due to temperature differences and air convection currents, leading to potential failures in electric conduction.
Innovation Solution
The electromagnetic relay design incorporates a structure where the coil is isolated from the contact parts by partition walls and a divided case, preventing high-temperature air from reaching the contacts and minimizing temperature differences, thereby reducing vapor condensation and freezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil and contact parts are placed in the same space, then the device structure is simple, but vapor condensation and freezing occur at the contact parts due to temperature differences
Solution Approach 1:
The case is divided into a coil chamber and a contact chamber by partition walls, physically separating the coil and contact parts into different spaces. This segmentation prevents hot air from the coil from reaching the contact parts, eliminating the temperature difference that causes vapor condensation and freezing, while maintaining reliable electric conduction at the contacts.
Solution Approach 2:
Partition walls serve as intermediary structures between the coil and contact parts. These walls block the direct path of hot air convection from the coil to the contact chamber, acting as a thermal and fluid barrier that prevents the harmful temperature differential without requiring direct contact or complex active control mechanisms.
2Reliability
If partition walls are introduced to separate coil and contact parts, then vapor condensation and freezing are prevented, but device complexity increases
Solution Approach 1:
The case is divided into a coil chamber and a contact chamber by partition walls, physically separating the coil and contact parts into different spaces. This segmentation prevents hot air from the coil from reaching the contact parts, eliminating the temperature difference that causes vapor condensation and freezing, while maintaining reliable electric conduction at the contacts.
Solution Approach 2:
The partition walls are integrated into the case structure itself, combining the functions of the case and the separating barriers into a single unified component. This merging approach avoids adding separate, complex isolation mechanisms while still achieving the goal of preventing hot air convection between chambers.
3Use of energy by moving object
If the coil heat is allowed to reach the contact parts, then energy efficiency is improved, but temperature difference causes vapor condensation and freezing
Solution Approach 1:
The case is divided into a coil chamber and a contact chamber by partition walls, physically separating the coil and contact parts into different spaces. This segmentation prevents hot air from the coil from reaching the contact parts, eliminating the temperature difference that causes vapor condensation and freezing, while maintaining reliable electric conduction at the contacts.
Solution Approach 2:
The partition walls, which block heat transfer, are designed to promote vapor condensation on their outer surfaces facing the coil chamber. This converted harm (blocked heat path) becomes beneficial by creating a condensation trap that removes moisture from the air before it can reach the contact parts, preventing freezing at the contacts.
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
This design effectively prevents vapor condensation and freezing at the contact parts, ensuring reliable electric conduction by isolating the coil's heat from the contact area and maintaining ambient temperature, thus enhancing the relay's performance under varying environmental conditions.
Implementation Method 1
air in the periphery of the coil heated by the heat generation of the coil
Implementation Method 2
air in the periphery of the coil heated by the heat generation of the coil reaches a contact part
Implementation Method 3
vapor condensation occurs in the contact part
Implementation Method 4
when the temperature of the contact part is a freezing point or lower, there is a fear that the condensate of the contact part may possibly freeze to cause a failure of electric conduction
Data Source
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AI summary
An electromagnetic relay which comprises a bobbin comprising a winding part jaw parts extending from both ends of the winding part, and a pair of opposing side wall parts; a coil wound on the winding part of the bobbin; an iron core attached to the bobbin; an armature supported so as to be freely swung by a hinge spring and magnetically attracted to one end of the iron core by supplying a current to the coil; a movable contact which contacts or is separated from a fixed contact in accordance with a swing movement of the armature; and a case that accommodates the elements, wherein the jaw part of the bobbin is formed to extend partly toward a side wall of the case from the winding part so as to separate a space where the coil exists from a space where the fixed contact and the movable contact exist, and wherein each of the side wall parts extends from the jaw part along an axis of the bobbin in a direction toward the space where the fixed contact and the movable contact exist.