Brewing Head Mixing Chamber Design for Stable Temperature Control
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Solution Overview
Problem
Existing coffee machines suffer from inadequate mixing of cold and hot water, leading to poor temperature regulation due to short heat exchange time, affecting the brewing process.
Innovation Solution
A manually-adjustable temperature brewing device with a combined valve body assembly featuring a secondary high-pressure mixing chamber and a tertiary opening and closing chamber, along with a solenoid valve, allows for precise control of water flow rates and temperature adjustment through manual manipulation of a valve needle, ensuring thorough mixing and stable temperature output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cold water and hot water are injected into the brewing head through a pipeline to adjust temperature, then temperature regulation is achieved, but the heat exchange time is too short resulting in poor mixing effect
Solution Approach 1:
The brewing head is divided into separate functional chambers: a first chamber for hot water injection, a second chamber for cold water injection, and a third chamber for mixed water output. This spatial segmentation allows each chamber to perform its specific function independently, ensuring sufficient heat exchange time for hot and cold water to mix thoroughly before reaching the brewing area, thereby resolving the contradiction between temperature regulation and heat exchange duration.
2Ease of operation
If flow rate adjustment is made to regulate temperature, then temperature control is achieved, but the mixing effect between cold and hot water is insufficient
Solution Approach 1:
A mixing chamber (third chamber) is introduced as an intermediary space between the hot water injection chamber and the brewing head. This intermediary chamber allows hot and cold water streams to interact and mix thoroughly before being delivered to the brewing area, ensuring stable and homogeneous temperature composition while maintaining ease of operation through flow rate adjustment.
3Temperature
If residual water is discharged before brewing, then temperature stability is improved, but time is wasted and water is consumed
Solution Approach 1:
The brewing head and internal chambers are preheated to the required temperature before the actual brewing process begins. This preliminary heating action ensures that when brewing starts, the temperature stability is already optimized, eliminating the need to discharge residual water beforehand. Consequently, both time and water are saved while maintaining the required temperature stability for brewing.
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 device achieves effective mixing of cold and hot water, providing broader temperature adjustment ranges and maintaining stable liquid temperature during brewing, reducing waste and saving time by allowing direct coffee brewing without discharging residual water.
Implementation Method 1
the brewing head is arranged with a solenoid valve, and the solenoid valve comprises a water inlet port and a water outlet port
Implementation Method 2
a secondary high-pressure mixing chamber and a tertiary opening and closing chamber are defined in the combined valve body assembly; the secondary high-pressure mixing chamber is arranged vertically, a side of the secondary high-pressure mixing chamber is arranged with a hot water port and a cold water port
Implementation Method 3
the hot water port and the cold water port are each arranged with a flow regulating device... the valve needle is threadedly connected to a side wall of the primary flow adjustment chamber; the valve needle is arranged facing the liquid inlet, and the valve needle is configured to close to or away from the liquid inlet to regulate an inlet flow rate
Data Source
AI summary
The present disclosure relates to a manually-adjustable temperature brewing device and a constant temperature adjustment method. The brewing device includes a brewing head; a side of the secondary high-pressure mixing chamber is arranged with a hot water port and a cold water port the brewing head is arranged with a solenoid valve, and the solenoid valve includes a water inlet port and a water outlet port; the tertiary opening and closing chamber includes an inlet chamber and an outlet chamber; the mixed water outlet is in communication with the inlet chamber, the inlet chamber is in communication with the water inlet port, and the outlet chamber is in communication with the water outlet port; a bottom of the outlet chamber is arranged with an outlet end, and the hot water port and the cold water port are each arranged with a flow regulating device.