Heater Type of HWOVs and HDs (DHp) (Symbol 2-5)

Full category name: Vaporizer Attributes of Cig-a-likes (CLs), Advanced Personal Vaporizers (APVs), E-Hookahs (EHs) and Herbal Vaporizers (HWOVs) (Group 2)

2.5         Heater Type of HWOVs and HDs (DHp) (Symbol 2-5)

This section describes the types of heaters that are used in HnB devices for heating dry plant matter to evaporate the active substance from them. In this case, the process of burning or smoldering does not occur, which allows reducing the level of harmful substances for the smoker.

Since the hybrid device consists of two types of devices combined in one case, here we will consider the options for heaters for the DHp part which is used to heat dry substance.

The Lp part of the hybrid device is completely similar to the design of CLs and APVs evaporators, this Lp part of LHDs is described in the previous part 2.4.

For CLs, APVs, EHs devices, the symbol 2.5 is denoted as X, because these types of devices do not have this type of heater.

For HVOVs and HDs (DHp) devices used alphabetic coding for this symbol, and the following six parameters are available:

A – Pit Heater

B – Rod Heater

C – Open Coil (only for HWOVs)

D – Irradiative Heater

E – Induction Heater

F – Tube Heater

 

A – Pit Heater

This heater is made in the form of a block with a recess.  Herbal or floral blend subject to vaporization is placed into this recess and, therefore, is in direct contact with the heater.  Thermal conductivity is the primary mechanism for heating herbal or floral blends with these heaters.

This heater is usually made of ceramic material that surrounds a heating element and can be metal-plated.

 

B – Rod Heater

This heater is made in the form of a thin rod, needle or made in the form of a flat plate.  A capsule of herbal or floral blend subject to vaporization is impaled with this heater and is in direct contact with it.  Thermal conductivity is the primary mechanism for heating herbal or floral blends with these heaters, too.

This heater is usually made of a ceramic material that surrounds a heating element and can be metal-plated.

 

C – Open Coil (only for HWOVs)

This heater is made in the form of an open Nichrome or Kanthal coil surrounded with a screen that prevents a direct contact of the heater with the herbal or floral blend subject to vaporization.  Convection is the primary mechanism for heating herbal or floral blends with these heaters.

D – Irradiative Heater

This heater is made in the form of a thermal radiation source that heats the herbal or floral blend subject to vaporization without a direct contact with it.  Thermal radiation is the primary mechanism for heating the herbal or floral blends with these heaters.

 

E – Induction Heater

This heater works on the principle of non-contact heating of electrically conductive materials by high-frequency currents. Dry Herbal substance is placed in a container made of metal (usually stainless steel) or wrapped in metal foil, or metal elements are introduced into the substrate of the herbal substance. High-frequency currents heat the metal or foil, which in turn transfers heat to the Dry herb substrate.

 

F – Tube Heater

This heater made of a heat-resistant material on which a resistive layer of metal is applied.

In this case, the cigarette or pre-formed dry herb capsule is inserted inside the tubular heater, and heat is transferred from it to the dry plant matter through the paper sleeve of the cigarette.

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