Two-Stage Vaporizer Heating to Prevent Pyrolysis
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Solution Overview
Problem
Existing vaporizers for cannabis and other plant materials face challenges in efficiently vaporizing active ingredients without pyrolysis, leading to non-uniform heating and potential loss of potency due to rapid heating methods.
Innovation Solution
A vaporizer employing a two-stage heating process, where the first heating stage rapidly heats the plant material to just below the vaporization temperature, followed by a second stage that heats it slowly to the vaporization temperature upon user inhalation, using electrodes and a temperature sensor to control the heating process and prevent pyrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid heating method 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 two distinct stages: a first rapid heating stage that brings the plant material close to vaporization temperature, and a second controlled heating stage that completes the vaporization. This segmentation allows the system to achieve high vaporization efficiency while preventing pyrolysis by controlling the temperature profile across different time periods.
Solution Approach 2:
The first heating stage performs preliminary heating to bring the plant material close to the vaporization temperature without completing the full vaporization process. This preliminary action prepares the material for efficient vaporization in the second stage while avoiding the harmful effects of excessive heating that would cause pyrolysis.
2Speed
If rapid heating is applied to heat plant material quickly, then heating speed is improved, but non-uniform heating occurs
Solution Approach 1:
The heating process is divided into two stages with different heating rates. The first stage uses rapid heating to quickly raise the temperature, while the second stage uses controlled heating to ensure uniform temperature distribution throughout the plant material, thereby achieving both speed and uniformity.
Solution Approach 2:
The heating rate is dynamically adjusted based on the heating stage. The system transitions from a high heating rate in the first stage to a lower, more controlled heating rate in the second stage, allowing the plant material to heat uniformly without sacrificing overall heating speed.
3Object-affected harmful factors
If heating is withheld below vaporization temperature, then pyrolysis is prevented, but vaporization efficiency is reduced
Solution Approach 1:
The vaporization process is segmented into two stages: the first stage rapidly heats the material close to vaporization temperature while preventing pyrolysis by withholding complete heating, and the second stage completes the vaporization efficiently. This segmentation resolves the contradiction by achieving both pyrolysis prevention and maintained vaporization efficiency through controlled timing.
Solution Approach 2:
The first heating stage performs preliminary heating to bring the material close to vaporization temperature without completing the process, preventing pyrolysis. The second stage then completes the vaporization efficiently, ensuring that overall vaporization efficiency is maintained despite the temporary withholding of heating.
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 ensures uniform heating, minimizes pyrolysis, and efficiently vaporizes active ingredients, maintaining potency while reducing the risk of overheating, resulting in a more effective delivery of cannabis and other plant-based substances.
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
using electrodes and a temperature sensor to control the heating process
Data Source
AI summary
Apparatus and methods are described for use with a vaporizer that vaporizes at least one active ingredient of a plant material. In response to receiving a first input to the vaporizer, the plant material is heated, in a first heating step. An indication of the temperature of the plant material is detected, and, in response to detecting an indication that the temperature of the plant material is at a first temperature, the first heating step is terminated, by withholding causing further temperature increase of the plant 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 plant material is heated to the vaporization temperature, in a second heating step. Other applications are also described.