Heat Pump Front Grille Segmentation for Safer Service Access
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Solution Overview
Problem
Existing heat source units for heat pumps have difficulty in maintenance due to limited access to the machine chamber, especially when installed in front of residential buildings, where space constraints and safety concerns arise when attempting to access components like the compressor and expansion valve.
Innovation Solution
A heat source unit design featuring a front grille with separate air and machine chamber portions, allowing the machine chamber portion to be detachably removed for maintenance while keeping the air chamber portion intact, ensuring safety and improved accessibility without exposing rotating fan blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire front grille is made as one integral piece covering both air chamber and machine chamber, then the outer appearance is improved and safety is enhanced, but maintenance accessibility deteriorates
Solution Approach 1:
The front grille is divided into two separate parts: an air chamber grille portion and a machine chamber grille portion. This segmentation allows the machine chamber grille to be removed independently for maintenance while the air chamber grille remains in place to protect the fan, thus resolving the contradiction between safety and maintenance accessibility.
2Ease of operation
If the back plate is removed to access machine chamber components, then maintenance accessibility is improved, but the space constraint problem worsens
Solution Approach 1:
The machine chamber grille portion is designed as a separate removable component that can be detached from the front of the heat source unit. This provides direct front-side access to the machine chamber components without requiring removal of the back plate, thereby improving maintenance accessibility while avoiding the space constraints associated with back-plate removal.
3Ease of operation
If the front grille is removed to access machine chamber, then maintenance accessibility is improved, but safety deteriorates due to exposed fan blades
Solution Approach 1:
The front grille is segmented into an air chamber grille portion and a machine chamber grille portion. The machine chamber grille can be removed for maintenance while the air chamber grille remains attached, continuing to protect the fan blades. This segmentation enables maintenance access while maintaining safety by keeping the protective barrier in place.
Solution Approach 2:
Only the machine chamber grille portion is removed for maintenance, extracting exactly the necessary protective element to gain access to the machine chamber components. The air chamber grille portion remains in place, continuing to provide safety protection against the rotating fan blades.
Data Source
Figure 1~2(c)
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a heat source unit (1) of a heat pump having a refrigerant circuit, the heat source unit (1) comprising: a fan (2) and a heat source unit casing (10), the heat source unit casing (10) comprising an air chamber (11) accommodating the fan (2), and a machine chamber (12) accommodating components of the refrigerant circuit of the heat pump. A top plate (13) is disposed on a top side of the heat source unit (1), a bottom plate (14) is disposed on a bottom side of the heat source unit (1), and a front grille (15) is disposed on a front side of the heat source unit (1) and extends over both the air chamber (11) and the machine chamber (12). The front grille (15) comprises an air chamber portion (151) covering at least a part of the air chamber (11) and a machine chamber portion (152) covering at least a part of the machine chamber (12), wherein the air chamber portion (151) and the machine chamber portion (152) are provided as two separate parts, separated along a direction from the top plate (13) toward the bottom plate (14), wherein the machine chamber portion (152) is detachably attached to the heat source unit casing (10) so as to be removable therefrom.