Blade-Heating Pump Cover for Compact Dishwasher Heat Pumps
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Solution Overview
Problem
Existing heat pump designs for dishwashers feature tubular heaters with a double-loop and spiral structure, which increase axial length and reduce power density, making them unsuitable for compact pumps.
Innovation Solution
A blade-heating heat pump cover with a heating element that extends from one side of the cover body, featuring a non-heating section away from the heating section, reducing water resistance and enabling a single-layer heating structure for miniaturization and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a double-loop and spiral heating tube structure is used, then the power density is reduced, but the axial length of the pump increases
Solution Approach 1:
The heating element transitions from a tubular spiral structure occupying axial space to a blade-shaped flat structure extending radially. This dimensional change from 3D spiral to 2D flat geometry allows the heating function to be achieved with minimal axial footprint, resolving the contradiction between power density and axial length.
Solution Approach 2:
The heating element changes its geometric parameters from a tubular form with large axial projection to a blade form with large radial extension and small axial thickness. This parameter transformation enables high power density concentration in the radial direction while maintaining compact axial dimensions.
2Power
If a tubular heater is used, then the heating function is achieved, but the water resistance increases
Solution Approach 1:
The heating element adopts a thin blade-shaped structure instead of a bulky tubular form. This thin-film geometry minimizes the obstruction to water flow while maintaining sufficient heating surface area, thereby reducing water resistance while preserving the heating function.
Solution Approach 2:
The heating element is designed with differentiated zones including a heating section and a non-heating section. The non-heating section specifically addresses water flow requirements by providing a streamlined transition zone that reduces turbulence and water resistance, while the heating section maintains effective thermal transfer.
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 reduces water resistance, stabilizes water flow, and achieves a more compact axial size, allowing for increased space in dishwashers by using a flat heating element with a higher radial-to-axial length ratio and a temperature-controlling assembly for efficient heat transfer and safety.
Implementation Method 1
when the heating element is electrically heating, the water flow through the water chamber is heated
Data Source
AI summary
Disclosed are a blade-heating heat pump cover and a heat pump. The blade-heating heat pump cover comprises a cover body having a first surface in contact with liquid and a second surface opposed to the first surface. The heat pump cover further comprises a heating element having a first end on one side of the first surface, and a second end passes through the cover body and protrudes from the second surface. The second end is provided with an electrical connection section used for energizing. The first end comprises a heating section and a non-heating section, the non-heating section is on one side of the heating section away from the second end, and the non-heating section is connected to the heating section.