Hot drinks machine
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Solution Overview
Problem
Existing hot beverage machines face challenges with pressure compensation due to overpressure and underpressure issues during heating and cooling, which require complex and expensive valves, increasing production and logistics costs while also risking leaks and system failures.
Innovation Solution
A pressure compensation path with a flow-limiting element, such as an orifice plate or throttle, is introduced between the pump and heating device, allowing pressure equalization without the need for traditional valves, reducing component complexity and costs, and minimizing the risk of leaks and failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional overpressure valves or vacuum valves are used for pressure compensation, then pressure equalization can be achieved, but the device complexity and production costs increase
Solution Approach 1:
The invention extracts the pressure compensation function from the complex valve system and implements it through a simple pressure equalization path with a flow-limiting element. The pressure equalization path branches off from the water line between the pump and heating device and opens into the water tank, allowing pressure equalization without requiring traditional overpressure or vacuum valves.
Solution Approach 2:
The invention changes the parameter of pressure control from active valve regulation to passive flow limitation through an orifice plate or throttle. This parameter change transforms the pressure compensation mechanism from an active, complex valve-based system to a passive, simple flow-restricted path that automatically equalizes pressure.
2Reliability
If traditional valves are used for pressure compensation, then pressure equalization can be achieved, but production costs and assembly costs increase
Solution Approach 1:
The invention replaces expensive, complex valves with a simple, inexpensive flow-limiting element such as an orifice plate or throttle. These components are much cheaper to manufacture and integrate into the fluid system, significantly reducing production costs while maintaining pressure compensation functionality.
3Reliability
If traditional valves are used for pressure compensation, then pressure control can be achieved, but the risk of leaks and system failures increases
Solution Approach 1:
By removing the complex valve components from the pressure control system, the invention eliminates the seals, moving parts, and connection points that are prone to leaking. The simple pressure equalization path with a flow-limiting element has fewer potential failure points, reducing the risk of leaks and system failures.
4Device complexity
If a flow-limiting element is used in the pressure equalization path, then component complexity is reduced, but clogging risk may increase
Solution Approach 1:
The flow-limiting element in the pressure equalization path is designed to be self-cleaning through the bidirectional flow of water during brewing and decalcification processes. This self-service mechanism reduces clogging risk by automatically clearing deposits from the orifice plate or throttle without requiring additional complex components.
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 solution simplifies pressure compensation, reduces production costs, lowers the risk of leaks and system failures, and minimizes the risk of clogging, while maintaining efficient operation with reduced susceptibility to errors and energy wastage.
Implementation Method 1
a flow-limiting element, e.g. a throttle or an orifice plate, is arranged in this pressure equalization path
Implementation Method 2
a heating device, and a brewing device arranged downstream of the heating device
Implementation Method 3
a pump arranged in the water line between the water tank and the heating device
Data Source
Figure 1~2
AI summary
The invention relates to a hot beverage vending machine (1), in particular a fully automatic coffee machine (2), comprising a water tank (3), a water line (5) leading from the water tank (3) to a heating element (4), a pump (7) arranged in the water line (5) between the water tank (3) and the heating element (4), and a brewing unit (6) arranged downstream of the heating element (4) at the end of the water line (5). A key feature of the invention is the provision of a pressure equalization path (8) which branches off from the water line (5) at a junction (9) between the pump (7) and the heating element (4) and opens into the water tank (3) above a water level (10), wherein an orifice (11) or a throttle (12) is arranged in the pressure equalization path (8). This eliminates the need for a large number of pressure equalization valves previously required.