Two-Stage Vaporizer Heating to Prevent Plant Material Pyrolysis
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Solution Overview
Problem
Existing vaporizers for medical Cannabis and other plant materials face challenges in efficiently vaporizing active ingredients without pyrolysis, leading to non-uniform heating and potential wastage of the active compounds.
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 slowly increases to the vaporization temperature upon user inhalation, utilizing resistive heating and temperature sensors to prevent overheating and ensure uniform vaporization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid heating is applied to vaporize the active ingredient, then vaporization efficiency is improved, but pyrolysis of the plant material occurs
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 throughout the process.
Solution Approach 2:
The first heating stage performs preliminary heating to bring the plant material to a temperature close to the vaporization point without completing the full vaporization process. This preliminary action prepares the material for efficient vaporization in the second stage while avoiding the conditions that lead to pyrolysis.
2Reliability
If continuous heating is applied to ensure complete vaporization, then vaporization completeness is improved, but non-uniform heating occurs
Solution Approach 1:
The heating process uses periodic action with two distinct phases: an initial rapid heating phase followed by a slower completion phase. This periodic approach ensures that heat distributes uniformly throughout the plant material while still achieving complete vaporization of the active ingredient, resolving the contradiction between completeness and uniformity.
3Productivity
If high temperature is maintained to ensure vaporization, then vaporization effectiveness is improved, but energy wastage increases
Solution Approach 1:
The heating system dynamically adjusts the heating rate based on the vaporization progress. The first stage uses high power for rapid heating, then transitions to a lower power second stage that completes vaporization efficiently. This dynamic control maintains vaporization effectiveness while minimizing energy wastage by avoiding unnecessary high-temperature maintenance.
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 reduces wastage of active ingredients, allowing for efficient vaporization of Cannabis and other substances while maintaining control over the dosage.
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 (e.g., into a metallic mesh of the capsule), or driving a current into an internal heating element that is housed within the vaporizer
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 plant 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 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.