PTC liquid heating device
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Solution Overview
Problem
Existing PTC liquid heating devices suffer from low heat transfer rates and uneven heat distribution due to complex heat transfer structures.
Innovation Solution
A PTC liquid heating device design featuring a housing with a PTC heating unit that includes a sleeve, heat conductor with chambers, and thermally conductive material, along with an insulating layer and flow guiding members for uniform heat transfer, and optionally using a PTC ceramic sheet with electrodes and insulating layers for enhanced conductivity and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a complex heat transfer structure is used in existing PTC liquid heating devices, then the device can accommodate various components, but the heat transfer rate becomes low and heat distribution becomes uneven
Solution Approach 1:
The heat transfer structure is divided into multiple independent heat transfer fins arranged in parallel. Each fin acts as an independent heat transfer path, increasing the total heat transfer area and improving heat distribution uniformity. The segmentation allows heat to be distributed evenly across multiple pathways rather than through a single complex structure.
Solution Approach 2:
The heat transfer fins extend in the longitudinal direction of the housing, adding a dimensional aspect to heat transfer. This longitudinal arrangement creates multiple heat transfer surfaces that extend along the length of the device, increasing the effective heat transfer area and improving both heat transfer rate and uniformity.
2Device complexity
If a complex heat transfer structure is used in existing PTC liquid heating devices, then the device can accommodate various components, but heat distribution becomes uneven
Solution Approach 1:
The heat transfer structure is divided into multiple independent heat transfer fins arranged in parallel. Each fin acts as an independent heat transfer path, increasing the total heat transfer area and improving heat distribution uniformity. The segmentation allows heat to be distributed evenly across multiple pathways rather than through a single complex structure.
Solution Approach 2:
Each heat transfer fin is designed with specific local characteristics optimized for heat transfer. The fins are positioned at different locations along the longitudinal axis, creating localized heat transfer zones that collectively achieve uniform overall heat distribution. This local optimization ensures each part contributes effectively to the whole.
3Device complexity
If conventional heating elements are used, then the device structure is simple, but corrosion resistance is poor and service life is reduced
Solution Approach 1:
The heating element uses a composite structure combining PTC ceramic heating cores with metal profile heat conductors. The PTC ceramic provides heating functionality with inherent corrosion resistance, while the metal profiles provide thermal conduction. This composite approach maintains structural simplicity while significantly improving corrosion resistance and service life.
Solution Approach 2:
The metal profiles act as intermediary heat conductors between the PTC ceramic heating cores and the liquid. This intermediary structure protects the PTC ceramic from direct contact with corrosive liquid environments while efficiently transferring heat, thereby improving both corrosion resistance and heat transfer performance.
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 solution provides uniform and efficient heat transfer, improves corrosion resistance, and prolongs the service life of the device by optimizing heat distribution and insulation.
Implementation Method 1
PTC heating core
Implementation Method 2
heat conductor with chambers
Implementation Method 3
thermally conductive material
Data Source
Figure 1a~1e
Figure 2a~2c
Figure 3a~3c
AI summary
A PTC liquid heating device comprises a housing extending along a longitudinal axis and defining a liquid inlet and a liquid outlet. A PTC heating unit is inserted into the housing and extends along the longitudinal axis. The PTC heating unit includes a sleeve, a heat conductor and at least one PTC heating core. The heat conductor has a pair of metal profiles defining at least one chamber, the at least one chamber extending along the longitudinal axis to receive the at least one PTC heating core. The heat conductor is located in the sleeve and has a shape matching the sleeve. The PTC liquid heating device provides uniform and efficient heat transfer. In addition, the PTC liquid heating device has improved corrosion resistance and insulation properties, thereby prolonging the service life of the PTC liquid heating device.