Heat pump cycle device
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Solution Overview
Problem
Conventional heat pump cycle devices using flammable refrigerants face challenges in maintaining airtightness to prevent refrigerant leaks while ensuring effective heat radiation and safety, leading to increased temperature and potential ignition risks.
Innovation Solution
A heat pump cycle device with a sealed electrical equipment box and internal air circulation, utilizing a blower device and a radiator plate to circulate air and maintain temperature distribution, combined with a metal housing for enhanced heat transmission and safety against refrigerant leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical equipment box is made airtight to prevent refrigerant leaks, then safety against ignition is improved, but heat radiation from electrical equipment deteriorates leading to temperature increase
Solution Approach 1:
The electrical equipment box is segmented into multiple chambers separated by partition walls. Each chamber can independently circulate air, allowing heat dissipation for specific high-heat-generating components while maintaining overall airtightness. This segmentation enables differential thermal management within the sealed enclosure.
Solution Approach 2:
Heat dissipation fans are introduced as intermediary devices that actively circulate air within the sealed electrical equipment box. These fans create internal convection currents that transfer heat from electrical components to the box walls and surrounding air, enabling heat radiation without compromising the airtight seal.
2Reliability
If the electrical equipment box is made airtight to prevent refrigerant entry, then safety is improved, but heat transmission and cooling capability deteriorate
Solution Approach 1:
Different regions of the electrical equipment box are designed with different thermal characteristics. Areas with high-heat-generating components have enhanced heat dissipation structures such as heat sinks, while other areas maintain standard insulation. This local differentiation optimizes heat transmission where needed while preserving overall airtightness.
Solution Approach 2:
The electrical equipment box incorporates movable components such as heat dissipation fans that can dynamically adjust air circulation based on thermal conditions. This dynamic capability allows the sealed box to adapt its heat transmission characteristics in response to varying operational temperatures, maintaining effective cooling without compromising the seal.
3Reliability
If conventional sealed structures are used to prevent refrigerant leaks, then safety is improved, but temperature control and service life of electronic components deteriorate
Solution Approach 1:
The electrical equipment box is divided into multiple independent chambers with separate air circulation systems. This segmentation allows targeted thermal management for different electronic components, preventing overheating that would otherwise shorten their service life while maintaining the overall sealed structure for leak prevention.
Solution Approach 2:
Heat dissipation fans serve as intermediary devices that actively manage thermal conditions within the sealed box. By continuously circulating air and removing heat from electronic components, these fans extend component service life without requiring the box to be unsealed, thus preserving both safety and reliability.
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
The device effectively prevents refrigerant entry and mitigates temperature increases, reducing malfunctions and extending the service life of electronic components while ensuring safety against ignition.
Implementation Method 1
a circulation device for circulating air is installed inside the electrical equipment box
Implementation Method 2
a heat source side heat exchanger stored inside a housing
Implementation Method 3
a blower device for circulating air through the heat source side heat exchanger
Data Source
Figure 1
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Figure 3
AI summary
The present disclosure provides a heat pump cycle device using a flammable refrigerant, which can achieve both the airtightness of an electrical equipment box and heat radiation of electrical equipment, and improve safety and reliability. The heat pump cycle device includes: a compressor 22, a use side heat exchanger 23, expansion means 24, and a heat source side heat exchanger 20 stored inside a housing 10; a refrigerant circuit connecting these members annularly and using a flammable refrigerant; a blower device 21 for circulating air through the heat source side heat exchanger 20; and an electrical equipment box 30, wherein the electrical equipment box 30 is configured to be airtight, and a fan 44 for circulating air is installed inside the electrical equipment box 30.