Refrigerant flow path switching unit and air conditioner provided with the same
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Solution Overview
Problem
Conventional refrigerant flow path switching units face difficulties in maintenance due to limited space, making it challenging to access and visualize the internal components, especially in areas with small height dimensions.
Innovation Solution
The refrigerant flow path switching unit is designed with maintenance openings on at least two side surfaces, allowing for easier access and visualization without needing to open the upper surface, and the electric component box is positioned to not obstruct these openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the maintenance opening is provided only on the upper surface of the case, then the structure is simple, but maintenance becomes difficult in spaces with small height dimensions
Solution Approach 1:
The patent transitions from a single upper-surface maintenance opening to multiple side-surface openings, changing the spatial dimension of access points. This allows maintenance personnel to approach the case from horizontal directions rather than vertically, solving the problem of limited headroom in installation spaces while maintaining structural simplicity.
Solution Approach 2:
The maintenance opening is segmented into multiple openings distributed across different side surfaces of the case. Each opening provides access to specific internal components, allowing maintenance personnel to reach different parts of the flow path switching valve from various directions, thereby improving maintenance accessibility without requiring vertical space.
2Reliability
If the electric component box is attached to the case, then electrical components are protected, but it obstructs the maintenance opening and prevents visual recognition and hand insertion
Solution Approach 1:
The electric component box is segmented into a case body portion attached to the case and a separate lid portion that can be opened. This segmentation allows the box to provide protection when closed while enabling access to electrical components when opened, preventing obstruction of the maintenance opening during maintenance operations.
Solution Approach 2:
The electric component box lid is designed to be movable rather than fixed. This dynamic design allows the lid to be opened during maintenance to clear the maintenance opening path, and closed during normal operation to protect the electrical components, thus resolving the contradiction between protection and accessibility.
Data Source
AI summary
A refrigerant flow path switching unit is disposed between a heat source unit and a utilization unit and switches a refrigerant flow in the utilization unit. The refrigerant flow path switching unit includes: a flow path switching valve; and a case that houses the flow path switching valve. The case has: a first maintenance opening on a first side surface; and a second maintenance opening on a second side surface.