Title of Invention

MULTI-USE HEATING DEVICE FOR THE EVAPORATION OF ACTIVE SUBSTANCES

Abstract Starting with a body formed by a base (1) and a cover (2) an opening (3) is established in the base (1) extended into a neck (4), for connecting the wick from the receptacle when a liquid product is concerned, this neck (4) being housed inside another cylindrical neck (10) of the cover (2) is closed position, defining a ring-shaped housing in which curved partitions (11-11') are formed, obtained by die pressing of respective plates (12-12') that act as a radiator, which also have fins (13) orthogonally bent and parallel to each other, between which the PTC resistance (15) and a spring (16), that facilitates the electrical connection, are set up; so that the plates (12) not only act as radiators but also as means of electrical supply to the resistance (15), for which they have connectors 916) for receiving the corresponding cables..
Full Text MULTI-USE HEATING DEVICE FOR THE EVAPORATION
OF ACTIVE SUBSTANCES
DESCRIPTION
PURPOSE OF THE INVENTION
This invention refers to a multi-use heating device for the evaporation
of active substances, such as those used as insecticides or air-fresheners, of
the type that use an electrical resistance, preferably of the PTC type, as
means of heating. The heater has a multiuse character, that is that it is
structured to be able to carry out the evaporation of products in liquid state, in
tablets or in the form of gel, indistinctly, achieving an optimum performance
independent of the nature of the product to be vaporized.
BACKGROUND TO THE INVENTION
Electrically operated heater devices exist that produce the
evaporation of liquids held in diffusers, in some cases, in other cases solids,
in the form of tablets; and sometimes they even allow the use of tablets or
liquids indistinctly, according to choice.
The devices presently known for the evaporation of those products
are usually fabricated using a PTC type electrical resistance connected to a
pair of metallic contacts. When activated, the electrical resistance heats a
ceramic or metallic plate through which, and placed near a tablet diffuser,
produces the evaporation of the corresponding substance. On the other
hand, the heater device can have an opening in which a wick is placed, that
is brought out to the exterior of a diffuser vessel holding a liquid product; so
that the heating of that wick produces the evaporation of the liquid substance
held in the vessel.
For that reason, a single heater device is not advisable, nor
efficient, for carrying out the evaporation of products in tablet form and liquid
form, indistinctly, since the optimum working temperature of the wick when
liquid products are concerned doesn't coincide with that of a tablet, when
solid products are concerned. Therefore two types of heater devices are
usually sold, one specific for liquids and another, also specific, for solids or
tablets.
In attempting to prevent this problem this applicant is holder of the
Spanish Invention Patent, with Application number 9801592, that describes a
multiuse heater device in which the electrical resistance is complemented
with an aluminium plate acting as a radiator, that is adequately held inside
the corresponding body. Both the body and the aluminium plate having an
opening through which a wick may be passed emerging through the mouth of
a vessel that holds a liquid product; at the same time that a frame type
separator element is placed on the body, with means of attachment to the
body, forming a support surface for a tablet that can thus be separated to a
greater or lesser extent from the heating plate by means of the separating
element, so that the tablet always has adequate heat to achieve its
evaporation with maximum efficiency.
This solution is structurally complex since two radiators are
needed, one for heating the tablet and another for heating the wick, since
exclusively using a radiator for the tablet, the heat transfer to the wick could
be insufficient.
However, the aluminium plate that acts as a radiator is kept
physically independent of the PTC resistance by an insulating film that
hinders the transfer of heat from the resistance to the radiator or aluminium
plate.
Furthermore, the connection contacts of the PTC resistance as
well as being independent from each other, are also independent from the
radiator, which multiplies the number of parts and complicates the structure
of the device.
DESCRIPTION OF THE INVENTION
The heater device that the invention proposes fully and
satisfactorily resolves the forementioned difficulties, in each and every of the
different aspects commented upon, forming a solution of maximum structural
simplicity and optimum operation, with perfect homogeneity in the extension
of heat to a pellet, on all its receptive surfaces, and also with an notable
provision of heat to a wick, in the case that the product is liquid coming from
a container vessel, also having a uniform distribution of the heat to all the
periphery of the wick.
For this purpose and more specifically the heater device that is
proposed is fabricated starting with a plastic body which has two parts, a
base and a cover, properly interconnectable and securable by any
conventional means. The forementioned base is fitted with a circular opening
extended into a cylindrical neck, for access of the wick in the case of coupling
of the device to a vessel holding the product in liquid phase. This neck is
coaxial with the other that exists in the cover, encircling the first and of
greater diameter, to define between them a ring-shaped throat in which two
aluminium plates are placed, curved and opposed, acting as a radiator, so
that together they mainly grip the neck of the base through which the wick
has to pass; these curved plates being a single-piece extension of other flat
plates, from which they are obtained by die pressing.designed to adapt to the
bottom of each of the two halves of the base of the body, impacting mainly on
its surface,and designed for heating in the case of a pellet or solid product.
In accordance with another of the characteristics of the invention
the two flat plates have orthogonally bent wings, also flat, that in the
assembly are parallel to each other and sufficiently distanced to allow the
placing between them of the PTC resistance, together with a spring that
assures an optimum connection, so that the aluminium pieces not only form
the thermal radiator, both for products in pellet form and for liquid products,
but furthermore it forms part of the PTC resistance supply circuit, specifically
forming the connection terminals between this resistance and the electrical
supply cables of the device.
Obviously both the base of the heater and the supplementary
cover will be duly configured for, after their assembly, duly immobilizing the
different functional components of the device in their interior.
The bottom of the base acts externally as a support surface for the
pellet of solid product, so that the degree of heating of the latter will be a function
of the thickness of the wall of the bottom of the forementioned base piece of the
heater body.
Accordingly, the present invention provides a multi-use heating device
for the evaporation of active substances such as herein described, being
fabricated starting with a body in which an electrical resistance, PTC type, is
placed, with its corresponding electrical supply connectors; an opening being
made in the body for passing a wick from a vessel holding the product, when this
is in liquid phase; a flat surface being defined in the body for positioning a pallet,
when it is a substance in solid state, said heating device being such that a
radiator in its interior allows dissipation of the heat generated by the resistance,
characterized in that said radiator is formed of two symmetrical aluminium plates,
in each one of which a main flat section is defined, these sections to be placed in
the same plane, and each of them being die pressed fomriing a semi-cylindrical
curved partition, and a flat fin; while in the base and cover of the body twin coaxial
necks and are established, fomning between them a ring-shaped fluting in which
the curved partitions are established, to surround, in its case, the wick supplying
the product from a vessel, while the fins adopt a parallel layout and receive
between them the PTC resistance and a metal strip or spring.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
To supplement this description and with the aim of leading to a
better understanding of the characteristics of the invention, in accordance
with a preferred example of its practical embodiment, as an integral part of
this description it is accompanied by a set of drawings where in an illustrative
and non-limiting way, the following have been represented:
Figure 1.- Shows a side elevation and cut-away of a multiuse
heating device for the evaporation of active substances, carried out in
accordance with the aim of this invention.
Figure 2.- Shows the same cut-away as the previous figure, now
with a perspective view.
Figure 3. - Shows a plan view and two 90° profiles of the assembly
of the previous figures, duly mounted.
Figure 4.- Finally shows in perspective view, the device of figure 3
duly attached to a vessel that supplies liquid product.
PREFERABLE EMBODIMENT OF THE INVENTION
In view of the figures depicted it can be observed how the multiuse
heater device that the invention proposes is fabricated starting from a body,
which has a base (1) and a cover (2), a base (1) that forms a kind of
approximately prismatic-rectangular bowl, with a perfectly flat bottom wall
(1), fitted with a circular opening (3) extended in a neck (4), also cylindrical,
f of adequate dimensions to allow the wick (5), from a vessel (6) holding the
product in liquid state, to be relatively tightly passed through it, when it is
considered appropriate, while the same external surface of the bottom (1)
forms the flat support base for a tablet, not shown in the drawings, when the
use of a solid phase product is intended.
As well as the neck (4) rising from its bottom wall, the base (1)
incorporates a peripheral partition (7), partially open, intended to receive, at
its free edge, an essentially flat plate (8), forming the cover (2) and fitted with
internal separators (9), as well as a cylindrical neck (10), also lateral and
partially open, of greater diameter than the neck (4) of the base (1), intended
to receive this latter in its cavity and to form with it a ring-shaped housing for
a pair of curved partitions (11-11'), obtained by die pressing from two
aluminium plates (12-12'), flat and in the same plane, designed to be seated
on the bottom of the base (1), specifically leaving free this latter's neck (4)
the said partitions (11) being placed in correspondence with this latter; at the
same time that these aluminium plates (12-12') respectively incorporate fins
(13), orthogonally bent in the same direction as the partitions (11), flat and
parallel, destined to act as terminals between which the PTC electrical
resistance (15) and a small spring (16) that assures its good electrical
contact with the fins (13), are established, which through the same plates
(12-12'), join to the connection terminals (16) for the respective electrical
supply cables, not shown.
The dimensions of the PTC resistance (15), specifically its
diameter, obliges an over-dimensioning of the body, to said effect the cover
(2) incorporates a closed protuberance (17) that partially houses in its interior
both the PTC resistance (15) and the extremity of the connection fins (13).
Thus it is achieved that the device can be applied to the wick (5) of
the vessel (6) holding a liquid product, as shown in figure 4, where the
optimum heating of the forementioned wick (5) is assured by the curved
partitions (11) that mostly surround this wick (5) impinging on a broad sector
of it. The device can similarly be used for products in solid state, in which
case the opening or cylindrical housing (3) for the wick is inoperative, the
pellet (not shown) being placed in position, on the flat surface of the base (1)
of the heater; a surface that, in turn, is mostly impinged on by the flat internal
aluminium plates (12-12') acting as a radiator, with an optimum and
homogeneous thermal transfer.
WE CLAIM:
1. Multi-use heating device for the evaporation of active substances such as
herein described, being fabricated starting with a body in which an electrical
resistance (15), PTC type, is placed, with its corresponding electrical supply
connectors; an opening (3) being made in the body for passing a wick (5) from a
vessel (6) holding the product, when this is in liquid phase; a flat surface being
defined in the body for positioning a pallet, when it is a substance in solid state,
said heating device being such that a radiator in its interior allows dissipation of
the heat generated by the resistance (15), characterized in that said radiator is
formed of two symmetrical aluminium plates (12-12'), in each one of which a main
flat section is defined, these sections to be placed in the same plane, and each of
them being die pressed forming a semi-cylindrical curved partition (11-11'), and a
flat fin (13-13'); while in the base (1) and cover (2) of the body twin coaxial necks
(4) and (10) are established, forming between them a ring-shaped fluting in which
the curved partitions (11-11') are established, to surround, in its case, the wick (5)
supplying the product from a vessel (6), while the fins (13-13') adopt a parallel
layout and receive between them the PTC resistance (15) and a metal strip or
spring (16).
2. Multi-use heater device for the evaporation of active substances as claimed
in claim 1, wherein the plates (12-12') forming the thermal dissipation radiator
also act as electrical connectors for the PTC resistance (15), the spring (16)
assuring the electrical contact of this resistance (15) with the fins (13-13'),
opposite which and above the plates (12-12') the terminals (16) for connection of
the respective electrical supply cables are set up.
3. Multi-use heater device for the evaporation of active substances as claimed
in claims 1 and 2, wherein the base (1) incorporates a peripheral partition (7),
partially open, for holding in its interior the two metallic plates (12-12') that act as
a radiator, this container being closed by means of the cover (2) fitted with
separators (9) that participate in the stabilization of the radiator plate (12-12'), the
aforementioned cover (2) having a protuberance (17) for housing the projecting
section of the PTC resistance (15) and the connection arms (13-13').
4. Multi-use heater device for the evaporation of active substances as claimed
in claims 1 to 3, wherein the thickness of the wall of bottom of the base (1), on
which the pellet must be supported, is variable according to the anticipated level
of heat transfer to said pallet depending upon the pallet characteristics.


Starting with a body formed by a base (1) and a cover (2) an opening (3) is
established in the base (1) extended into a neck (4), for connecting the wick from
the receptacle when a liquid product is concerned, this neck (4) being housed
inside another cylindrical neck (10) of the cover (2) is closed position, defining a
ring-shaped housing in which curved partitions (11-11') are formed, obtained by die
pressing of respective plates (12-12') that act as a radiator, which also have fins
(13) orthogonally bent and parallel to each other, between which the PTC
resistance (15) and a spring (16), that facilitates the electrical connection, are set
up; so that the plates (12) not only act as radiators but also as means of electrical
supply to the resistance (15), for which they have connectors 916) for receiving the
corresponding cables..

Documents:

1109-kolnp-2003-abstract.pdf

1109-kolnp-2003-assignment.pdf

1109-kolnp-2003-claims.pdf

1109-KOLNP-2003-CORRESPONDENCE 1.2.pdf

1109-KOLNP-2003-CORRESPONDENCE-1.1.pdf

1109-kolnp-2003-correspondence.pdf

1109-kolnp-2003-description (complete).pdf

1109-kolnp-2003-drawings.pdf

1109-kolnp-2003-examination report.pdf

1109-kolnp-2003-form 1.pdf

1109-kolnp-2003-form 13.pdf

1109-kolnp-2003-form 18.pdf

1109-kolnp-2003-form 3.pdf

1109-kolnp-2003-form 5.pdf

1109-kolnp-2003-gpa.pdf

1109-kolnp-2003-reply to examination report.pdf

1109-kolnp-2003-specification.pdf


Patent Number 243334
Indian Patent Application Number 1109/KOLNP/2003
PG Journal Number 41/2010
Publication Date 08-Oct-2010
Grant Date 06-Oct-2010
Date of Filing 02-Sep-2003
Name of Patentee DBK ESPANA, S. A.
Applicant Address ARGENTERS, 2-4-8 EDIF 3 C/P, C/B PARC TECHNOLOGIC DEL VALLES, CERDANYOLA DEL VALLES, E-08290, BARCELONA
Inventors:
# Inventor's Name Inventor's Address
1 BASAGANAS MILLAN ARGENTERS, 2-4-8 EDIF 3 C/P, C/B PARC TECHNOLOGIC DEL VALLES, CERDANYOLA DEL VALLES, E-08290, BARCELONA
PCT International Classification Number H01C 7/02
PCT International Application Number PCT/ES2001/00094
PCT International Filing date 2001-03-13
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 09/783,993 2001-02-16 U.S.A.