Refrigeration cycle device
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Solution Overview
Problem
In refrigeration cycle apparatuses, the existing double anti-vibration structure design often results in large centrifugal forces on the compressor due to its placement away from the vibration center, leading to increased loads on pipes and shear forces on elastic members, which can cause stress and potential damage during vibration.
Innovation Solution
The compressor is positioned close to the centroid of the second elastic members, with specific geometric arrangements ensuring that the projected positions of the compressor and elastic members form distances that keep the compressor and elastic members within defined circles, thereby reducing centrifugal forces, shear forces, and stress on the compressor connection pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor is disposed away from the center of vibration of the support member, then the anti-vibration structure can be implemented, but large centrifugal force acts on the compressor and pipes are subjected to large load
Solution Approach 1:
The patent positions the compressor at the centroid of the support member, which is the equilibrium point where vibrational forces are minimized. This equipotential positioning ensures that the compressor experiences minimal centrifugal force during base vibrations, resolving the contradiction between achieving vibration isolation and minimizing centrifugal force on the compressor.
Solution Approach 2:
The patent introduces elastic members as intermediary elements between the base and the compressor. These elastic members act as mediators that isolate the compressor from direct vibration transmission while allowing the compressor to be positioned at the centroid, thereby reducing both vibration transmission and centrifugal force effects.
2Reliability
If the compressor is disposed away from the center of vibration of the support member, then the anti-vibration structure can be implemented, but large stress is applied to the compressor connection pipe
Solution Approach 1:
By positioning the compressor at the centroid of the support member, the patent ensures that the connection pipe experiences minimal stress during vibrations. The centroid position is the equipotential point where vibrational stresses are minimized, thereby resolving the contradiction between vibration isolation and stress reduction on the connection pipe.
Solution Approach 2:
The elastic members serve as intermediary elements that reduce the transmission of vibrational stress to the compressor connection pipe. This intermediary structure allows the system to achieve vibration isolation while protecting the connection pipe from excessive stress.
3Reliability
If the compressor is disposed away from the center of vibration of the support member, then the anti-vibration structure can be implemented, but large shear force is applied to the elastic members
Solution Approach 1:
The patent positions the compressor at the centroid of the support member, which is the equipotential point that minimizes shear forces on the elastic members during vibrations. This positioning resolves the contradiction between achieving vibration isolation and minimizing shear force on the elastic members by eliminating the eccentricity that would otherwise generate large shear forces.
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 configuration minimizes centrifugal forces on the compressor, reduces shear forces on the elastic members, and decreases stress on the compressor connection pipes, enhancing vibration suppression and stability during base vibrations.
Implementation Method 1
The compressor is disposed on the base via the first elastic members. The base is disposed on the bottom member via the second elastic members
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A refrigeration cycle apparatus having a double anti-vibration structure has a problem that, when a compressor is not disposed at a proper location on an intermediate base, shaking of the compressor during vibration increases and thus, a large centrifugal force acts on the compressor. When a compressor (1) is disposed via a bottom member (20a) of a housing (20), second elastic members (24), a base (21), and first elastic members (23), the compressor is disposed close to an arrangement centroid of the second elastic members.