CA2196666C - Electric device for the vaporization of additives - Google Patents

Electric device for the vaporization of additives

Info

Publication number
CA2196666C
CA2196666C CA002196666A CA2196666A CA2196666C CA 2196666 C CA2196666 C CA 2196666C CA 002196666 A CA002196666 A CA 002196666A CA 2196666 A CA2196666 A CA 2196666A CA 2196666 C CA2196666 C CA 2196666C
Authority
CA
Canada
Prior art keywords
contacts
rotating joint
housing
joint member
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002196666A
Other languages
French (fr)
Other versions
CA2196666A1 (en
Inventor
Heinrich Wolfgang Steinel, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steinel GmbH and Co KG
Original Assignee
Steinel GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steinel GmbH and Co KG filed Critical Steinel GmbH and Co KG
Publication of CA2196666A1 publication Critical patent/CA2196666A1/en
Application granted granted Critical
Publication of CA2196666C publication Critical patent/CA2196666C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00Stationary means for catching or killing insects
    • A01M1/20Poisoning, narcotising, or burning insects
    • A01M1/2022Poisoning or narcotising insects by vaporising an insecticide
    • A01M1/2061Poisoning or narcotising insects by vaporising an insecticide using a heat source
    • A01M1/2077Poisoning or narcotising insects by vaporising an insecticide using a heat source using an electrical resistance as heat source
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00Disinfection, sterilisation or deodorisation of air
    • A61L9/015Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/02Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air by heating or combustion
    • A61L9/03Apparatus therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10Apparatus features
    • A61L2209/13Dispensing or storing means for active compounds
    • A61L2209/135Vaporisers for active components

Abstract

An electrical device is disclosed for evaporating active substances. It comprises a housing in which is arranged an electrical heating device and into which a receptacle containing the active substance can be inserted. The device also has a heat exchanger which is in thermal contact with the heating device and located at a point where the active substance evaporates. A connecting plug is provided on the housing for connection to an electrical socket and has a first rotating connection unit which engages with a second rotating connection unit in the housing. Contacts are provided in each of the rotating connection units and can be connected to or disconnected from the associated opposing contacts in the other rotating connection unit. According to the invention, the contacts and associated opposing contacts are arranged on the two rotating connection units in such a way that a continuous electrical connection is created between the connecting plug contacts and the heating device in each of two possible positions separated by 90~, and an angle range is created between the two with a switching position in which the connection is opened.

Description

Electric Device for the va~orization of Additives The present invention refers to an electric device for the vaporization of additives according to the preamble of claim 1.

Devices of that kind have become more popular, e.g. for vaporizing scents and fragrances, to repel small insects, such as mosquitoes for example. These devices are preferrably provided with a plug integrated within the housing, so that the device can be directly plugged into a socket.

A problem is that the device can normally only be operated in a certain position, since the additive is usually bound in a liquid carrier material or in a paste, and that leaking of the carrier material is only prevented in a certain position of the device, but the bushes of a wall socket can be on a horizontal or a vertical line.

There are devices existing which solve this problem by providing a plug within this housing which can be turned at an angle of approximately 90~. Then it is possible to pivot the housing of the device to the desired operating position.

Devices of that kind are known, which are provided with an electric switch, by means of which the heating can be turned on and off. The device does not have to be pulled out of the wall to be turned off.

The object of the invention is to provide a device of the above-mentioned kind, which is provided with an adaptor to vertical or horizontal wall sockets, and which is still of a simple design.

This object is solved on the basis of a device of the kind of the invention in that the plug is provided with a first rotating '_ joint member, which is engages a second rotating joint member arranged within the housing and that contacts are arranged in each of the rotating joint members, which can be brought into and out of contact with the contacts associated to each of the respective contacts of the other rotating joint member.

The contacts and the respective counter-contacts on the two rotating joint members are arranged so that a continuous electrical connection between the plug contacts and the heating results in two positions offset by 90~ and an angular range with a switch position results in which the connection is opened.

By providing the contacts and the respective counter-contacts on the two rotating joint member, a simplified construction of the device results which is turned on and off by rotating the housing with respect to the plug. The device can always take a certain turn-on position because the device has two turn-on positions offset by 90~, said operating position being independent from the fact whether the device is plugged into a vertical or a horizontal wall socket.

Moreover, an operator will easily recognize from the position of the housing in which operating condition the device is, since the housing is in a different position in the turned-off position than in the turned-on position of the device.

Preferrably, the angular range with the closed connection is considerably smaller than the annular range with a closed connection, the ratio of the angular range with a closed connection to the angular range with an opened connection is 1:5.

In an advantageous embodiment, the heating comprises at least one PTC resistor, disposed between two metallic electrodes, connected to the contacts of the rotating joint member through electric connection conduits. PTC heating resistors are known to ' .

stabilize themselves at a temperature depending on their ~;m~nsiOnS.

The construction of the device becomes much more easy if the connecting conduits, the contacts, the heat exchanger and possibly the electrodes are integrally formed of a punching sheet, which is bent after punching, if necessary and which is coated by a plastic material at the points at which an increased inherent stability or heat insulation is required. The device becomes much more simple by providing the essential electrically conducting parts on a simple punching sheet, since otherwise the common strand connections become useless. Moreover, the electrically conducting parts get a higher strength due to the plastic material, which elongates the life of the device and reduces the electrical power loss.

In a preferred embodiment, the electric connecting conduits are provided in the region between the contacts of the rotating joint member close to the housing in the form of two quarters of a ring disposed on top of each other, and the connecting conduits are bent at a position between the quarters of a ring and the electrodes about an angle of approximately 90~ with respect to the electrodes. Preferrably, the quarters of a ring are coated by plastic material in a manner that an almost closed ring results.

In this embodiment, the rotating joint member, close to the housing, is, after bending, vertical to the plane in which the electrodes and the heat exchanger are formed. This considerably simplifies the manufacturing process, since all manufacturing steps can be performed in one level and afterwards only a bending of the connecting conduits is necessary to bring the rotating joint member near the housing to the required vertical position in which it is inserted into the housing.

The rotating joint member is preferrably connected in a rigid connection to the plug, and is rotatably guided in the wall of s '~

the housing preferrably about an angle of 90~. This design ensures that the operator can only turn the device between the two turn-on positions offset about 90~.

In a further advantageous further development, the rotating joint members engage each other by means of a lock-in connection, which guarantees defined switching conditions of the device. The contacts of the one rotating joint member contacts in the turn-on position the counter-contacts of the other rotating joint member and a tight contact of the contacts is supported by the lock-in connection The present invention will new be explained under reference to the drawings:

Fig. 1 is a lateral view of the device;

Fig. 2 is a lateral view of the heating of the device disposed within the housing;

Fig. 3 is a top view of the heating, shown in Fig. 2, Fig. 4 is a lateral view to the plug and the first rotating joint member of the present invention;

Fig. 5 is s front view of the first rotating joint member;

Fig. 6 is a view of the punching sheet member, containing essential parts of the device; and Fig. 7 is a magnified section of an electrode with a heat exchanger formed integrally therewith.

According to Fig. 1, the device comprises a housing consisting of two semimonocoque parts of the housing la, lb, with a container 2 connectable thereto, in which the substance to be _r vaporized is located, e.g. a liquid with additives resolved therein. The attachment means between the housing and the container 2 consist of an external thread attached at the upper end of the container and a respective internal thread formed in the lower semimonocoque part of the housing lb. A wick 3 is disposed within the container 2, consisting of carbon fibers or textile threads. The liquid to be vaporized is transported through the wick to the heating 4, closer defined in Fig. 2 and 3. A plug S with two plug contacts 6 attached thereto is rotatably supported within the housing. As can be derived from Fig. 4, the plug comprises an annular groove 7, which engages a correspondingly formed edge of the semimonocoque parts of the housings la, lb, if the housing is closed.

The heating 4 comprises a PTC heating element clamped between two electrodes 8 disposed on top of each other, not directly shown in Fig. 2 and 3, since the most part of the electrodes is coated by a heat resistant and insulating plastic material and prevents a free sight to the PTC element. The electrodes are embedded in the plastic material on the opposite side. The sides facing each other comprise a contact surface, which is large enough to completely contact the PTC element. A continuous web is formed along the outer edge of the electrodes, wherein the webs are disposed on the upper and lower electrode in a manner that they mesh with one another. Thereby, a closed cavity is formed, with which the PTC element is retained in form-fit fashion. A resilient, conductive element is disposed between the lower electrode an the PTC element, which, together with a U-shaped clamping spring 9 surrounding the electrodes from the outside, is responsible for a good contact between the electrodes and the PTC element. The electric part of the heating furthermore comprises connecting conduits 10, a part of which being connected through a region 11 having a reduced wire cross section to the electrodes 8, as can be seen more clearly in Fig.
6.

A heat exchanger 12 consists of two annular sections 13 disposed on top of one another, which comprise a molded section 14 made of the same metallic material as the electrodes. As can be seen in Fig. 7, the ratio between the length of the molded region 13 to the thickness of the electrode is approximately 6:1. The molding process is performed in a manner that the material strength of the molded region ~iminishes towards the free end thereof. It is in particular important in molding that sufficient material is existing at the point between the molded section 14 and the annular section 13 so that a good heat transition is ensured on the molded part. The greater material thickness at the points, which are close to the heating element, leads to the result that the heating energy is transmitted well up to the outer ends. The annular and molded region 13 or 14 is completely embedded in the plastic material. The coated, annular and molded regions of the heat exchanger can be seen in Fig. 3, said heat exchanger comprising an axially centered passage channel 12a. The annular region is coated with a thin insulation material at the inner wall thereof, so that as much heat energy as possible can be conducted into the passage channel 12a. The outer wall of the annular region in turn, has a thick insulating layer, which becomes thicker towards the free end in the axial direction of the molded region. An insulation formed in that manner reduces the heat losses and is responsible that the heat transmitted in this manner is transported exactly to the desired point in the passage channel.

The essential steps of manufacturing a device according to the present in~ention will now be explained.

Fig. 6 shows a punching sheet part 15 with the essential parts of the electric heating. In the completely punched condition, the sheet portions, shown in dotted lines in the drawing, are completely separated. Two electrodes 8 can be seen, with annular portions 13, formed integrally with the electrodes, each comprising a molded section 14. Connecting conduits 10 are integrally formed with the electrodes 8 and the annular section 8 21 ~6666 13, partially via regions 11 having a reduced cross section. The connecting conduits are provided in the left half of the punching member, shown in Fig. 6, having the shape of a quarter of a circle and facing each other, and each of them carry a pair of contacts offset about 90~.

In a further method step, the punching sheet member is coated by a plastic material at the points at which an increased inherent stability or heat insulation is required. The coating of the rings having the shape of a quarter of a circle is carried out so that an almost closed ring is formed, with the contacts 16 projecting radially inwardly at the inner wall thereof. A web 17 is formed at the front side of the ring, said web extending in the axial direction of the ring. The web extends at a length of approximately a fourth of the ring and comprises a plurality of recesses 18 with bevelled surfaces (Fig. 3) at its inner wall.
After the coating process, the spots shown with dotted lines in Fig. 6 are separated, which causes the electrode, shown in the left half, to completely fall out. Then, the connecting conduits, having the shape of a quarter of a circle, embedded into the almost closed ring, are bent at the portions 19 about 90~ with respect to the remaining electric part of the heating, which can be seen in Fig. 2.

Finally, the heating is totally provided with resistors 20 and a light emitting diode 21.

During operation of the device, the electric circuit of the heating functions as follows: Starting at a connecting conduit 10, the heating current flows through safety resistor 20 to the upper annular section 13, integrally formed with the upper electrode 8. From this electrode, the current flows through the PTC heating element to the lower electrode 8 and then to a second connecting conduit 10, which is completely coated by a plastic material. The two connecting conduits 10 are connected with the plug contacts 6 of the plug 5, shown in Fig. 1. A
protective resistor 20 is connected in parallel to the pair of electrodes 8, with a light emitting diode 21 connected in series thereto. The connecting conduits for the protective resistor and the light emitting diode are located at the upper and the lower annular section 13 of the heat exchanger 12.

PTC heating elements are known to stabilize themselves at a temperature depending on their ~;m~nsions. For the present embodiment, the PTC heating element was chosen so that it generates a temperature of 150~C at the predefined operating voltage. Since the upper and the lower electrode 8 are in tight contact with the heating element, and the annular sections are integrally formed with the molded portion at the heating element, the heat generated by the heating element is transported to the heat exchanger 12. Based on the embodiment of the device according to the invention, the heat loss is so low that a temperature of approximately 128~C is measured in the passage channel at the wick. The small temperature loss of only 22~C with respect to the operating temperature of the PTC is remarkable. Furthermore a very small fluctuation of temperature of only 0.5~C has been proven during long-time tests.

It has to be pointed to the fact, that the heating, which was described in the embodiment, is only an example and that a lot more of technical possibilities exist for realizing this heating. The heating element, for example, does not necessarily have to consist of a PTC heating element, but can also be a heating winding made of a heating wire, which is embedded in a ceramic heating body.

A different embodiment of the present invention, not shown in the drawings, differs from the above-mentioned embodiment by a different heat exchanger 8. In this embodiment, the annular section 13 and the molded section 14 are replaced by a planar heating surface. Furthermore, a container is provided which is located above the heating surface, e.g. a heat resistant plastic bowl, instead of the container 2 with the wick retained therein.
The substance to be evaporated is situated in the bowl, which is regularly heated by the heating surface disposed directly underneath the bowl. In this embodiment the housing comprises a suitable opening, through which the container can be supplied with the substance to be evaporated.

It will new be referred to Fig. 4 and 5, which describe a first rotating joint member 22:

The first rotating joint member 22 is rigidly connected to the plug 5 and basically consists of a disk-like carrier portion 23, carrying two opposing strip-like electric contacts 24. The electric contacts 24 are connected to the plug contacts 6 through contact pins 25 (Fig. 5). A cam 26 is provided at the outer periphery of the disk-like carrier portion 23, said cam having two surfaces at its free end, including an angle of approximately 120~ with one another.

A second rotating joint member 27 basically consists of the almost closed ring, which evolved from the coating of the connecting conduits 10, formed as a quarter of a circle (compare Fig. 2 and 3) and of the web 17, connected thereto, which comprises a number of recesses.

If the device according to the invention is installed, the carrier portion 23 of the first rotating joint member 22 engages the annular second rotating joint member 17. The cam 26 formed at the carrier portion 23 engages into the recesses 18, formed at the inner wall of the second rotating joint member. If the plug 5 is rotated with the first rotating joint member attached thereto with respect to the housing, the cam 26 latchingly slides over the recesses 18 of the second rotating joint member.
The rotation of the plug S with respect to the housing is limited by means of a limiting means, which is not shown in detail, to approximately 90~.

Claims (7)

Claims:
1) A device for the vaporization of additives, perfumes or similar volatile substances, comprising a housing, in which an electric heating is disposed and into which a container containing the additive can be inserted, a heat exchanger, which is in heating contact with the heating and which is disposed at a position at which the additive shall be evaporated, further comprising a plug for a wall socket connected to the housing, characterized in that the plug (5) is connected to a first rotating joint member (22), engaging a second rotating joint member (27) disposed within the housing (1a, 1b) and that contacts (16) are arranged in each of the rotating joint members (22, 27), which can be brought into and out of contact with counter-contacts (16) of the respective other rotating joint member (27, 22) associated thereto, wherein the contacts and the respective counter-contacts are arranged on the two rotating joint members in a manner that a continuous electrical connection between the plug contacts (6) and the heating (4) results in two positions offset about 90°, and that an angular range with a switch position results in which the connection is opened.
2) A device according to claim 1, characterized in that the angular range with a closed connection is considerably smaller than the angular range with an opened connection, preferrably at a factor which is smaller than 1:5.
3) A device according to claim 1 or 2, characterized in that the heating (4) comprises at least one PTC resistor, which is disposed between two metallic electrodes (8), which are connected through electric connecting lines (10) to the contacts (16) of the rotating joint member (27) near the housing.
4) A device according to claim 3, characterized in that the connecting conduits (10), the contacts (16), the heat exchanger (12) and possibly the electrodes (8) are integrally formed of a punching sheet (15), which is bent after punching, if necessary, and which is coated by a plastic material at the points at which an increased inherent stability or heat insulation is required.
5) A device according to claim 4, characterized in that the electric connecting conduits (10) are provided between the contacts (16) of the rotating joint member (27) close to the housing in the form of two opposing quarters of a ring, and that the connecting conduits (10) are bent about an angle of approximately 90° with respect to the electrodes (8) at a position between the quarters of a ring and the electrodes (8), and that the quarters of a ring are coated by plastic material in a manner that an almost closed ring results.
6) A device according to one of claims 1 to 5, characterized in that the first rotating joint member comprises a rigid connection with the plug (5) and is rotatably guided in the wall of the housing (1a, 1b) preferrably about an angle of 90°.
7) A device according to at least one of claims 1 to 6, characterized in that the first rotating joint member (22) engages the second rotating joint member (27) through a lock-in connection (18, 26).
CA002196666A 1994-08-03 1995-07-24 Electric device for the vaporization of additives Expired - Fee Related CA2196666C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP94112152A EP0696457B1 (en) 1994-08-03 1994-08-03 Electric vaporizer for active substances
EP94112152.7 1994-08-03
PCT/EP1995/002917 WO1996004021A1 (en) 1994-08-03 1995-07-24 Electrical device for evaporating active substances

Publications (2)

Publication Number Publication Date
CA2196666A1 CA2196666A1 (en) 1996-02-15
CA2196666C true CA2196666C (en) 1999-07-13

Family

ID=8216172

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002196666A Expired - Fee Related CA2196666C (en) 1994-08-03 1995-07-24 Electric device for the vaporization of additives

Country Status (13)

Country Link
US (1) US5926614A (en)
EP (1) EP0696457B1 (en)
JP (1) JP3057377B2 (en)
KR (1) KR100198096B1 (en)
CN (1) CN1108828C (en)
AT (1) ATE176594T1 (en)
AU (1) AU683402B2 (en)
BR (1) BR9508488A (en)
CA (1) CA2196666C (en)
DE (1) DE59407811D1 (en)
ES (1) ES2129552T3 (en)
GR (1) GR3030078T3 (en)
WO (1) WO1996004021A1 (en)

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US8858236B2 (en) 2011-10-28 2014-10-14 S.C. Johnson & Son, Inc. Rotatable plug assembly and method of reducing strain in a wire
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Also Published As

Publication number Publication date
KR970704479A (en) 1997-09-06
CN1108828C (en) 2003-05-21
AU683402B2 (en) 1997-11-06
ATE176594T1 (en) 1999-02-15
ES2129552T3 (en) 1999-06-16
DE59407811D1 (en) 1999-03-25
MX9700838A (en) 1997-10-31
WO1996004021A1 (en) 1996-02-15
AU3165195A (en) 1996-03-04
JP3057377B2 (en) 2000-06-26
CN1154656A (en) 1997-07-16
BR9508488A (en) 1997-11-25
GR3030078T3 (en) 1999-07-30
CA2196666A1 (en) 1996-02-15
JPH09510130A (en) 1997-10-14
EP0696457B1 (en) 1999-02-10
KR100198096B1 (en) 1999-06-15
US5926614A (en) 1999-07-20
EP0696457A1 (en) 1996-02-14

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