Heat Pump Heat Exchanger Layout for Front-Loading Washer-Dryers
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Solution Overview
Problem
Front-loading laundry washing and drying machines with a substantially horizontal axis face challenges in integrating heat pump components due to limited space, leading to complex and vulnerable assembly configurations, especially during operation with inclined axes.
Innovation Solution
The heat exchangers of the heat pump are positioned in a lateral area between the side wall and the median vertical plane of the tub, allowing for a more compact and stable arrangement that reduces the risk of impact during operation and enhances heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If heat pump components are mounted above the oscillating assembly in a front-loading machine with substantially horizontal axis, then space utilization is improved, but the assembly becomes vulnerable to impact during operation
Solution Approach 1:
The patent relocates heat pump components from the vertical dimension (above the tub) to the lateral dimension (between the side wall and median vertical plane). This dimensional shift allows space utilization without compromising stability, as the lateral positioning places components away from the impact zone during oscillation while still providing adequate mounting area.
2Area of stationary object
If heat exchangers are integrated into the upper wall panel, then space efficiency is improved, but device complexity increases
Solution Approach 1:
The patent extracts heat exchangers from the complex integrated panel structure and relocates them to a simpler lateral mounting position. This separation simplifies the upper wall panel design while maintaining space efficiency through optimized lateral arrangement of components in the available space between the side wall and median plane.
3Reliability
If heat pump components are positioned in lateral area, then assembly stability is improved, but space utilization becomes more constrained
Solution Approach 1:
The patent employs dynamic positioning strategies where heat pump components are placed in the lateral area that is optimally positioned relative to the oscillating assembly's movement characteristics. This dynamic consideration ensures components remain stable during operation while utilizing the full extent of available lateral space, balancing stability requirements with space constraints.
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
This configuration enables a simpler, more reliable, and energy-efficient design for front-loading machines with horizontal or slightly inclined axes, reducing the risk of component damage and improving heat exchange performance.
Implementation Method 1
The condenser and the evaporator hence generally comprise a respective cooling fluid-drying air heat exchanger
Implementation Method 2
In operation, the temperature of the cooling fluid increases following upon compression by the compressor
Implementation Method 3
The cooling fluid is made to pass into a condenser, where it yields heat to the flow of air, which is thus heated
Implementation Method 4
the evaporator performs the function of condensation of the humidity present in the air extracted from the tub
Implementation Method 5
From the condenser, the cooling fluid first passes into a lamination valve, constituted, for example, by a simple capillary tube, which expands and cools the fluid
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A front-loading laundry washing and drying machine, comprises: a cabinet (2) having a front wall, a rear wall, two side walls (5a, 5b) and an upper wall, the cabinet (2) housing an oscillating assembly that comprises a treatment tub (14) having a substantially horizontal longitudinal axis (A); a drying circuit comprising a heat pump inside the cabinet (2), the heat pump including an evaporator device, a condenser device, a compressor, and a fan for forcing a flow of air through the evaporator device and the condenser device. At least the evaporator device and the condenser device are housed inside the cabinet (2) above the treatment tub (14), the evaporator device and the condenser device each including a heat exchanger (122, 123) having a body configured for being traversed by the forced flow of air. The heat exchanger (122, 123) of at least one of the evaporator device and the condenser device is set inside the cabinet (2) in a lateral area (S) that is comprised between a first side wall (5a) of the cabinet (2) and a median vertical plane (P1) of the treatment tub (14) that contains the corresponding longitudinal axis (A). The heat exchanger (122, 123) of the at least one of the evaporator device (122) and the condenser device (123) is set in the aforesaid lateral area according to a plane of lie (P4, P5) generally inclined with respect to a horizontal plane.