Two-Stage Vaporizer Heating to Prevent Pyrolysis
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Solution Overview
Problem
Existing vaporizers for cannabis and other plant materials often fail to efficiently vaporize active ingredients without pyrolysis, leading to non-uniform heating and potential loss of potency, due to rapid heating methods that can exceed pyrolysis temperatures.
Innovation Solution
A vaporizer employing a two-stage heating process, where the first heating stage rapidly heats the material to just below the vaporization temperature, followed by a second stage that slowly increases to the vaporization temperature upon user inhalation, using resistive heating via electrodes and a temperature sensor to prevent overheating and ensure uniform vaporization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid heating is used to vaporize active ingredients, then vaporization efficiency is improved, but pyrolysis occurs and potency is lost
Solution Approach 1:
The heating process is divided into multiple discrete temperature stages: a first temperature stage for initial heating and a second temperature stage for vaporization. This segmentation allows the system to avoid the harmful pyrolysis temperature range while still achieving efficient vaporization of active ingredients.
Solution Approach 2:
The system dynamically changes the heating temperature parameter based on the vaporization needs of different active ingredients. By adjusting the temperature between the first temperature (below pyrolysis point) and second temperature (optimal vaporization point), the system optimizes vaporization efficiency while preventing degradation.
2Speed
If rapid heating is applied to heat material quickly, then heating speed is improved, but non-uniform heating occurs
Solution Approach 1:
The heating process is segmented into phases: initial rapid heating to the first temperature, then transition to the second temperature for uniform vaporization. This segmentation allows the material to heat uniformly at each stage rather than experiencing thermal shock from immediate high-temperature application.
Solution Approach 2:
The system performs preliminary heating to the first temperature before initiating full vaporization heating. This preliminary action prepares the material by gradually increasing temperature, ensuring more uniform heat distribution throughout the material before rapid vaporization occurs.
3Reliability
If heating continues without interruption to reach vaporization temperature, then vaporization completeness is improved, but pyrolysis temperature is exceeded
Solution Approach 1:
The temperature control is segmented into distinct stages with the first temperature serving as an intermediate step. The system heats to the first temperature, maintains or pauses, then proceeds to the second temperature for vaporization. This prevents continuous heating from causing temperature overshoot and pyrolysis.
Solution Approach 2:
The system uses temperature sensing to monitor the heating process and provides feedback control. When the material reaches the appropriate temperature for vaporization, the system adjusts or terminates heating to prevent exceeding the pyrolysis temperature, ensuring complete vaporization without degradation.
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 method effectively prevents pyrolysis, ensures uniform heating, and efficiently vaporizes active ingredients, maintaining potency while minimizing waste and ensuring safe temperature control.
Implementation Method 1
the heating element includes one or more electrodes that heat the capsule via resistive heating, by driving a current into a portion of the capsule
Implementation Method 2
a heating element configured, while each of the capsules is disposed at a vaporization location within the vaporizer, to cause the active ingredient of the material within the capsule to become at least partially vaporized by individually heating the capsule
Data Source
AI summary
Apparatus and methods are described for use with a vaporizer that vaporizes at least one active ingredient of a material. In response to receiving a first input to the vaporizer, the material is heated, in a first heating step. An indication of the temperature of the material is detected, and, in response to detecting an indication that the temperature of the material is at a first temperature, the first heating step is terminated, by withholding causing further temperature increase of the material. The first temperature is less than 95 percent of the vaporization temperature of the active ingredient. Subsequently, a second input is received at the vaporizer. In response thereto, the material is heated to the vaporization temperature, in a second heating step. Other applications are also described.