Heatable high-pressure cleaning device
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Solution Overview
Problem
Heatable high-pressure cleaning devices with fuel-operated heat exchangers face challenges in cost-effectiveness and service life due to material degradation from liquid fuel, which impairs the joint area between tank parts, leading to potential leaks.
Innovation Solution
The fuel tank is designed with a materially bonded connection between its upper and lower parts, allowing filling only below the joint area in the horizontal position, using a fill level limiting device to prevent fuel from reaching the joint area, and integrating an elastically deformable impact protection to absorb shocks and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the upper part of the fuel tank is materially bonded to the lower part to reduce manufacturing costs, then manufacturing cost is reduced, but the joint area becomes vulnerable to fuel-induced material degradation and leakage
Solution Approach 1:
The patent changes the spatial arrangement by orienting the joint area horizontally in the operating position, creating a dimensional separation between the fuel level and the joint area. The fill level limiting device ensures fuel remains below the joint area, effectively using vertical dimension management to protect the horizontally oriented joint from fuel contact.
Solution Approach 2:
The fill level limiting device acts as an intermediary mechanism that prevents direct contact between the fuel and the joint area. This intermediary structure ensures that while the tank can be filled to capacity, the fuel level is physically constrained to remain below the joint area, thereby protecting the material bond from degradation.
2Quantity of substance
If the fuel tank is filled to maximum capacity to increase fuel storage, then fuel storage volume is increased, but the joint area becomes exposed to fuel contact leading to material degradation
Solution Approach 1:
The patent utilizes vertical space management by ensuring the joint area is positioned above the maximum fuel level. The horizontal orientation of the joint area in the operating position creates a spatial separation that allows maximum fuel storage while preventing fuel contact with the joint area through proper dimensional arrangement.
Solution Approach 2:
The fill level limiting device is designed to prevent fuel from reaching the joint area before any degradation can occur. This preliminary protective action ensures that even when the tank is filled to maximum capacity, the joint area remains protected from fuel contact throughout the operational lifecycle.
3Ease of operation
If the joint area is exposed to fuel contact to allow complete filling, then filling flexibility is improved, but the joint area becomes brittle and the fuel tank leaks
Solution Approach 1:
The fill level limiting device serves as a protective intermediary that allows flexible filling operations while simultaneously protecting the joint area from fuel contact. This intermediary structure enables the tank to be filled to maximum capacity without compromising the strength of the joint area.
Solution Approach 2:
The patent segments the fuel tank into distinct functional zones: the fuel storage area below the joint level and the joint area above the fuel level. This segmentation allows the lower portion to be filled to capacity while the upper joint area remains protected from fuel-induced degradation, maintaining both filling flexibility and joint strength.
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 design reduces manufacturing costs while extending the service life by preventing fuel-induced material degradation and protecting the joint area from mechanical damage, ensuring a liquid-tight and durable fuel tank.
Implementation Method 1
a heat exchanger (19), in particular a heat exchanger with a coiled tube (27), which is heated by a burner and through which the cleaning liquid is passed
Implementation Method 2
The heat exchanger is usually operated using a liquid fuel, for example heating oil or diesel, and for this purpose can have a coiled tube which is heated by a burner
Implementation Method 3
a cleaning liquid, preferably water, can be pressurized by means of a high-pressure pump
Implementation Method 4
The upper part of the tank (38) is connected to the lower part of the tank (36) via a weld seam (40)
Implementation Method 5
at least one elastically deformable impact protection (88), in particular at least one elastically deformable impact lip, which is formed onto the upper part of the tank (38) or the lower part of the tank (36)
Data Source
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AI summary
The invention relates to a heatable high-pressure cleaning device (10) comprising a fuel-operated heat-exchanger (19) and a fuel tank (34) which has a tank upper section (38) with a closable filling opening (34), and a tank lower section (36) which forms the base (48) of said fuel tank (34). To improve the heatable high-pressure cleaning device (10) such that it can be produced more cost-effectively and has a longer life-span, it is suggested that the tank upper section (38) and the tank lower section (36) are bonded together by means of a joining region (60) and that, when the high-pressure cleaning device (10) is in a horizontal use position, the fuel tank (34) can only be filled with liquid fuel up to below said joining region (60).