KR102367020B1 - Film heater structure for cigarette type electronic cigarette apparatus with excellent heat efficiency - Google Patents

Abstract

The present invention relates to a film heater structure for a cigarette-type electronic cigarette device with excellent heat efficiency. According to the present invention, a compact structure is provided by integrating a film heater and a film-type temperature sensor at a small thickness. In addition, an insulating layer surrounding the film heater is introduced to minimize heat loss. The film heater structure of the present invention includes: a cigarette support portion supporting a cigarette; a film-type heater unit disposed outside the cigarette support portion and heating the cigarette bound to the cigarette support portion; a heat-dissipation adhesive layer disposed between the cigarette support portion and the film-type heater unit and joining the cigarette support portion and the film-type heater unit; and an insulating layer disposed so as to surround the film-type heater unit.

Description

FILM HEATER STRUCTURE FOR CIGARETTE TYPE ELECTRONIC CIGARETTE APPARATUS WITH EXCELLENT HEAT EFFICIENCY with excellent thermal efficiency

The present invention relates to a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency, and more particularly, to have a compact structure by integrating a film-type heater and a film-type temperature sensor with a thin thickness, and a film-type heater It relates to a film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency designed to minimize heat loss by introducing an insulating layer surrounding the cigarette.

In general, cigarettes in the form of cigarettes have been almost the only means of inhaling preference substances, but recently, liquid e-cigarettes have been established as one means.

In such a liquid e-cigarette, heat or ultrasonic waves are applied to a cartridge containing an inhaled material in liquid form to vaporize the inhaled material into vapor, thereby generating fine particles. Accordingly, the liquid e-cigarette is completely different from the conventional cigarette-type cigarette that generates smoke in terms of the method, and in particular, it is possible to prevent the generation of various harmful substances that may be generated by combustion.

On the other hand, in recent years, according to the demand of consumers who prefer a conventional cigarette-type cigarette, a cigarette-type electronic cigarette having a cigarette shape has been proposed. The cigarette-type electronic cigarette has a configuration in which the user inhales through a cigarette filter having a configuration equivalent to that of a general cigarette while vaporizing the inhaled material contained in the cigarette with a heater.

In a cigarette-type e-cigarette, unlike a conventional cigarette in which dried tobacco leaves are filled, the cigarette is filled with paper impregnated with an inhaling material or buried on the surface. When the cigarette is inserted into the case of the cigarette-type electronic cigarette device and the heater inside the case is heated to vaporize the inhaled material of the cigarette, the user can inhale the vaporized inhaled material through the cigarette filter.

Accordingly, the cigarette-type e-cigarette can inhale the vaporized inhalation material through the filter of the cigarette in the same mechanism as when a normal cigarette is smoked without burning like the liquid e-cigarette.

However, in the conventional cigarette-type electronic cigarette device, in the heater for heating a cigarette, the heater part and the cigarette support part are bonded with an adhesive layer, but the heat generated by the heater part is lost to the outside due to the heater part being exposed to the outside. there was

In addition, heat transfer and thermal efficiency are very important as the conventional heater for a cigarette-type e-cigarette device has to reach about 300°C within 20 sec. Due to the separation type, it was difficult to assemble as well as to accurately detect the temperature increase rate.

As a related prior document, there is Republic of Korea Patent Publication No. 10-1927134 (announced on Dec. 11, 2018), which describes a heater and an electrically heated smoking device including the same.

An object of the present invention is to have a compact structure by integrating a film-type heater and a film-type temperature sensor with a thin thickness, and a cigarette-type electronic with excellent thermal efficiency designed to minimize heat loss by introducing an insulating layer surrounding the film-type heater To provide a film heater structure for a cigarette device.

According to an embodiment of the present invention for achieving the above object, there is provided a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency, comprising: a cigarette support unit for supporting a cigarette; a film-type heater unit disposed on the outside of the cigarette support unit to heat the cigarette bound to the cigarette support unit; a heat dissipation adhesive layer disposed between the cigarette support and the film heater to bond the cigarette support and the film heater; and a heat-insulating layer disposed to surround the film-type heater unit.

The heat-insulating layer is made of a heat-insulating material having a plurality of pores therein, and the heat-insulating layer is a first for blocking pores on at least one of the exposed upper surface, the lower surface and the side so that the pores existing therein are not connected to the outside. A surface treatment coating layer is formed to block the penetration of liquid components.

The film-type heater unit and the heat insulating layer are disposed to be spaced apart from each other at regular intervals, and an air gap is positioned in a space between the film-type heater unit and the heat insulating layer.

The air gap exists as an entirely empty space between the film-type heater unit and the heat insulating layer, or is partially present by a heat insulating support interposed at regular intervals between the film-type heater unit and the heat insulating layer.

The air gaps are intermittently or continuously formed at intervals of 50 μm to 2 mm.

The lower portion of the insulating support is made of an insulating material that has no pores connected to the outside or the pores are blocked.

The heat dissipation adhesive layer may include a thermoplastic polyimide resin; and a heat dissipation filler dispersedly disposed in the thermoplastic polyimide resin.

The heat dissipation adhesive layer has a thickness of 0.1 ~ 100㎛.

In addition, the film-type heater unit includes a film-type heater having a heating pattern; a film-type temperature sensor laminated on the film-type heater and having a sensing pattern; an interlayer adhesive layer disposed between the film-type heater and the film-type temperature sensor to bond the film-type heater and the film-type temperature sensor; and a protective layer disposed on the film-type temperature sensor to protect the film-type temperature sensor.

The film-type heater unit includes a heater pad electrically connected to the heating pattern of the film-type heater; and a flexible connector for sensor connection having a sensing connection pattern electrically connected to the sensing pattern of the film-type temperature sensor.

The film-type heater part has an overall thickness of 200 μm or less.

The heat insulating layer has heat resistance of 300° C. or higher, and is made of any one of a polymer material including a plurality of pores, a ceramic material, and a polymer-ceramic composite material.

The film-type heater unit and the heat insulating layer are disposed to be spaced apart from each other at regular intervals, and an air gap is positioned in a space between the film-type heater unit and the heat insulating layer.

The air gap exists as an entirely empty space between the film-type heater unit and the heat insulating layer, or is partially present by a heat insulating support interposed at regular intervals between the film-type heater unit and the heat insulating layer.

The air gaps are intermittently or continuously formed at intervals of 50 μm to 2 mm.

The heat insulating support is made of an insulating material in which the exposed portions of the upper surface, the lower surface and the side have no pores connected to the outside or the pores are blocked.

The heat insulating support is made of a heat insulating material having a plurality of pores therein, and the heat insulating support blocks pores on at least one of the exposed upper surface, the lower surface and the side so that the pores existing therein are not connected to the outside. A second surface treatment coating layer is formed to block the liquid component from penetrating.

The film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency according to the present invention is a film-type heater in which a film-type heater and a film-type temperature sensor are mutually bonded through an interlayer adhesive layer, and the film-type temperature sensor is protected by a protective layer As a negative application, it has an integral structure in which the film-type heater and the film-type temperature sensor are integrally coupled.

As a result, since the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to the present invention has an integrated structure in which the film-type heater and the film-type temperature sensor are integrated, the assembly of each part can be simplified. It is possible to save approximately 30% or more in assembly time.

In addition, the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to the present invention can minimize the temperature delay by applying a film-type temperature sensor that is integrally coupled with the film-type heater, as well as a film-type heater and a separate type Compared to the conventional ceramic temperature sensor assembled with a temperature sensor, the reaction rate to temperature is very fast, so it becomes very easy to control the temperature.

Therefore, in the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to the present invention, a film-type heater unit having an integrated structure in which a film-type heater and a film-type temperature sensor are integrated is applied, thereby precisely increasing a very fast temperature increase rate. Sensing may become possible.

In addition, the film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency according to the present invention applies a heat insulating layer of an air gap structure spaced apart from the film-type heater unit at regular intervals, thereby minimizing heat generation to the outside. Since it can induce heat to be concentrated inside, it is possible to minimize battery consumption.

1 is a cross-sectional view showing a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention.
2 is a perspective view showing a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention.
3 is a cross-sectional view showing a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention.
4 is an enlarged perspective view of the film-type heater of FIG. 3;
5 is an enlarged plan view of the film-type heater of FIG. 3;
6 is a perspective view showing a film heater structure according to a first modification of the present invention.
7 is an enlarged cross-sectional view of part A of FIG. 6 ;
8 is a perspective view showing a film heater structure according to a second modified example of the present invention.
9 is a perspective view showing a film heater structure according to a third modified example of the present invention.
10 is an enlarged perspective view of the film-type heater of FIG. 9;
11 is a perspective view showing a film heater structure according to a fourth modified example of the present invention.
12 is a photograph showing a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention.
13 is a graph showing the results of measuring the internal temperature change according to the attachment method of the SUS pipe.
14 is a graph showing the results of evaluating the effect of whether or not the PI insulation layer is attached.
15 is a graph showing a result of evaluating the effect of whether or not an air gap is formed.

Advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only this embodiment allows the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, with reference to the accompanying drawings, a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to a preferred embodiment of the present invention will be described in detail as follows.

1 is a cross-sectional view showing a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention.

1 and 2, the cigarette-type electronic cigarette device 500 with excellent thermal efficiency according to an embodiment of the present invention includes a case 100, a battery 200, a control unit 300, and a film heater structure 400. include

The case 100 is provided with a cigarette insertion hole (T) for inserting the cigarette 10 at one end. The case 100 has an internal space for mounting the battery 200 and the control unit 300 . This case 100 may be designed as a separate type. For example, when the user turns the case 100 clockwise or counterclockwise, the upper end and the lower end of the case 100 may be separated.

At this time, only the components related to the embodiment of the present invention are shown in FIGS. 1 and 2 . Accordingly, it is an embodiment of the present invention that the cigarette-type electronic cigarette device 500 having excellent thermal efficiency according to an embodiment of the present invention may further include other general-purpose components in addition to the components shown in FIGS. 1 and 2 . It can be understood by those of ordinary skill in the related technical field.

When the cigarette 10 is inserted into the cigarette insertion hole T of the case 100 , the cigarette-type electronic cigarette device 500 heats the film heater structure 400 . At this time, the temperature of the aerosol-generating material in the cigarette 10 is increased by the heated film heater structure 400 , and thus an aerosol is generated. The generated aerosol is delivered to the user through the filter of the cigarette 10 .

The battery 200 supplies power used to operate the cigarette-type electronic cigarette device 500 . For example, the battery 200 may supply power so that the film heater structure 400 can be heated. Also, the battery 200 may supply power required for the control unit 300 to operate. In addition to this, the battery 200 may supply power required to operate a display, a sensor, a motor, etc. installed in the cigarette-type electronic cigarette device 500 .

As the battery 200 , a lithium iron phosphate (LiFePO ₄ ) battery may be used, but is not necessarily limited thereto.

The controller 300 controls the overall operation of the cigarette-type electronic cigarette device 500 . Specifically, the control unit 300 controls the operation of other components included in the cigarette-type electronic cigarette device 500 along with the battery 200 and the film heater structure 400 . Also, the controller 300 may determine whether the cigarette-type electronic cigarette device 500 is in an operable state by checking the states of each of the components of the cigarette-type electronic cigarette device 500 .

To this end, the control unit 300 includes at least one processor. The processor may be implemented as an array of a plurality of logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory in which a program executable in the microprocessor is stored.

The film heater structure 400 is heated by the power supplied from the battery 200 . When the cigarette 10 is inserted into the cigarette insertion hole T of the case 100 , the film heater structure 400 surrounds the outside of the cigarette 10 . To this end, the film heater structure 400 may have a cylindrical structure having a cigarette fixture (H) therein. Accordingly, the heated film heater structure 400 may raise the temperature of the aerosol generating material in the cigarette 10 .

In general, heat transfer and thermal efficiency are very important as the film heater structure 400 has to reach up to 300° C. within 20 sec. Therefore, in order to detect such a temperature increase rate, it is absolutely necessary to integrate a film-type temperature sensor, which has a very fast reaction rate, with a film-type heater.

Therefore, in the present invention, the film-type heater and the film-type temperature sensor are integrated with a thickness of 200 μm or less, and a heat insulation layer is attached to have an air gap to minimize external heat generation, thereby minimizing heat loss and precisely controlling heat transfer and temperature increase rate. A film heater structure 400 that can be detected was manufactured.

To this end, the film heater structure 400 of the present invention includes a cigarette support part and a film heater part, a heat dissipation adhesive layer for bonding between the cigarette support part and the film heater part, and a heat insulating layer disposed to surround the film heater part. .

In particular, the film heater structure 400 of the present invention has a compact structure by application of a film-type heater unit in which a film-type heater and a film-type temperature sensor are integrated with a thin thickness, and is heated by the introduction of a heat insulating layer surrounding the film-type heater unit. losses can be minimized.

Hereinafter, with reference to the accompanying drawings, a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention will be described in detail.

3 is a cross-sectional view showing a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention, FIG. 4 is an enlarged perspective view of the film-type heater unit of FIG. 3, and FIG. 5 is the film of FIG. It is a plan view showing an enlarged type heater unit, and will be described in conjunction with FIG. 2 .

2 to 5, the film heater structure 400 for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention includes a cigarette support part 410, a film-type heater part 420, and a heat dissipation adhesive. layer 430 and a thermal insulation layer 440 .

The cigarette support 410 serves to support the cigarette 10 . The cigarette support 410 may be disposed at the center of the film heater structure 400 . At this time, the cigarette support 410 may have a cylindrical shape having a cigarette holder (H). Considering that the temperature of the film heater structure 400 is used at about 300° C. during operation of the cigarette-type electronic cigarette device 500, the cigarette support 410 includes a polymer material, a ceramic material, and a metal material having heat resistance of 300° C. or higher. Any one of them may be used. At this time, it is more preferable to use a metal material having excellent thermal conductivity and good durability, more preferably, SUS material, for the cigarette support unit 410 .

The film-type heater unit 420 is disposed on the outside of the cigarette support 410 and is mounted to heat the cigarette 10 bound to the cigarette support 410 .

To this end, the film-type heater unit 420 includes a film-type heater 421 , a film-type temperature sensor 422 , an interlayer adhesive layer 423 , and a protective layer 424 . The film-type heater unit 420 may have a laminated structure in which two or more layers of the film-type heater 421 are stacked for rapid temperature increase. In this case, it is more preferable that the film heater unit 420 has a laminated structure in which two to four film heaters 421 are vertically stacked.

The film heater 421 includes a film heater body 421a and a heating pattern 421b disposed in the film heater body 421a. The film heater body 421a is preferably made of a polymer material or a ceramic material having heat resistance of 300° C. or higher. For example, a polyimide film may be used as a material of the film heater body 421a. Adhesive layers (not shown) may be formed on both surfaces of the film heater body 421a, respectively.

The heating pattern 421b may be disposed on one or both surfaces of the film heater body 421a. For the heating pattern 421b, a metal material having excellent conductivity may be used. Specifically, the heating pattern 421b is used by selecting from among stainless steel (SUS), copper (Cu), nickel (Ni), aluminum (Al), constantan, nichrome, and other nickel-based alloys. can be The heating pattern 421b may have a thickness of 10 to 40 μm, and 15 to 25 μm as a more preferable range.

The film-type temperature sensor 422 is laminated on the film-type heater 421 . The film-type temperature sensor 422 includes a film temperature sensor body 422a and a sensing pattern 422b disposed in the film temperature sensor body 422a.

The film temperature sensor body (422a), like the film heater body (421a), it is preferable to use a polymer material or a ceramic material having a heat resistance of 300 ℃ or more. For example, a polyimide film may be used as a material of the film temperature sensor body 422a.

The sensing pattern 422b may be formed on one or both surfaces of the film temperature sensor body 422a. The sensing pattern 422b is preferably made of a metal material having a temperature coefficient resistance (TCR) of 100 ppm or more. Specifically, copper (Cu), nickel (Ni), etc. may be used as the sensing pattern 422b, and sometimes a heater component may perform temperature sensing in parallel. The sensing pattern 422b preferably has a thickness of 20 μm or less, and a more preferable range may be 5 to 15 μm. Here, the sensing pattern 422b may be formed of two or more layers via an adhesive layer.

The interlayer adhesive layer 423 is disposed between the film-type heater 421 and the film-type temperature sensor 422 to bond the film-type heater 421 and the film-type temperature sensor 422 . Although not shown in detail in the drawings, the interlayer adhesive layer 423 may include an interlayer adhesive support layer and an upper heat-resistant adhesive and a lower heat-resistant adhesive disposed on both surfaces of the interlayer adhesive support layer, respectively. In this case, it is preferable to use a polymer material having heat resistance of 300° C. or higher or a ceramic-polymer composite material for the interlayer adhesion support layer. For example, a polyimide film may be used as a material of the interlayer adhesive support layer, and a thermoplastic polyimide resin (TPI) may be used as each material of the upper and lower heat-resistant adhesives.

The protective layer 424 is disposed on the film-type temperature sensor 422 and is formed to protect the film-type temperature sensor 422 . This protective layer 424 may have a thickness of 10 ~ 300㎛. The protective layer 424 may include a protective support layer and a protective heat-resistant adhesive disposed on a lower surface of the protective support layer. By such a protective heat-resistant adhesive, the protective layer 424 is physically attached to the film temperature sensor 422 . In this case, it is preferable to use a polymer material having heat resistance of 300° C. or higher or a ceramic-polymer composite material for the protective support layer. For example, a polyimide film may be used as a material of the protective support layer, and a thermoplastic polyimide resin (TPI) may be used as a heat-resistant adhesive for protection.

In addition, the film-type heater unit 420 may further include a heater pad 427 and a flexible connector 425 for connecting the sensor.

The heater pad 427 is electrically connected to the heating pattern 421b of the film heater 421 . The heater pad 427 is formed on the surface of the protective layer 424 and exposed to the outside, and is electrically connected via a via electrode (not shown) penetrating the protective layer 424 and the film-type temperature sensor 422 . there may be

The flexible connector 425 for sensor connection has a connector body 425a and a sensing connection pattern 425b disposed inside the connector body 425a and electrically connected to the sensing pattern 422b of the film-type temperature sensor 422. has At this time, a stiffener 426 is disposed at the end of the flexible connector 425 for sensor connection, and a sensing terminal (not shown) electrically connected to the sensing connection pattern 425b is disposed on the rear surface of the stiffener 426 .

Here, the heater pad 427 and the flexible connector 425 for connecting the sensor are connected to the controller 300 of the cigarette-type electronic cigarette device 500 . In response to the control signal from the controller 300 , the operation of the film heater unit 420 in which the film heater 421 and the film temperature sensor 422 are integrally coupled can be controlled.

The film-type heater unit 420 of the present invention preferably has an overall thickness of 200 μm or less, and a more preferable range may be 120 to 140 μm. If the total thickness of the film-type heater unit 420 exceeds 200 μm, the flexible characteristic may decrease due to an increase in rigidity due to excessive thickness design, which may lead to difficulty in assembly. Therefore, it is preferable to design the total thickness of the film-type heater unit 420 to be 200 μm or less.

In particular, in the film-type heater unit 420 of the present invention, the film-type heater 421 and the film-type temperature sensor 422 are bonded to each other via an interlayer adhesive layer 423 , and a film-type heater 421 is formed by the protective layer 424 . The temperature sensor 422 is protected. Accordingly, the film-type heater unit 420 has an integrated structure in which the film-type heater 421 and the film-type temperature sensor 422 are integrally coupled.

As a result, the film heater structure 400 for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention has an integrated structure in which the film-type heater 421 and the film-type temperature sensor 422 are integrated. Since the assembly of the parts can be simplified, it is possible to save about 30% or more of the assembly time when assembling the parts.

In addition, the film heater structure 400 for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention reduces the temperature delay by applying the film-type temperature sensor 422 integrally coupled with the film-type heater 421. In addition to being able to minimize the temperature, it is possible to control the temperature very easily because the reaction rate to the temperature is very fast compared to the conventional ceramic temperature sensor assembled separately from the film heater 421 .

The heat dissipation adhesive layer 430 is disposed between the cigarette support 410 and the film heater 420 to bond the cigarette support 410 and the film heater 420 . That is, the heat-dissipating adhesive layer 430 is disposed between the cigarette support 410 and the film-type heater 420 to stably adhere the film-type heater 420 to the cigarette support 410, as well as the cigarette It serves to prevent overheating of the film-type heater unit 420 during operation of the electronic cigarette device 500 .

The heat dissipation adhesive layer 430 preferably has a thickness of 0.1 to 100 μm. When the thickness of the heat dissipation adhesive layer 430 is less than 0.1 μm, the thickness is too thin, so there is a fear that adhesion may not be reliably achieved. Conversely, when the thickness of the heat dissipation adhesive layer 430 exceeds 100 μm, there is a fear that heat transfer efficiency may be lowered due to excessive thickness design.

As such, the heat dissipation adhesive layer 430 includes a thermoplastic polyimide resin and a heat dissipation filler added to the inside of the thermoplastic polyimide resin in order to prevent overheating of the film-type heater unit 420 by smoothly transferring heat.

In this case, it is preferable to use a thermoplastic polyimide resin having a glass transition temperature (Tg) of 240 to 300°C and a thermal decomposition temperature (Td) of 500 to 550°C as the thermoplastic polyimide resin. In this way, the cigarette support part 410 and the film-type heater part 420 using a high heat-resistant thermoplastic polyimide resin having a glass transition temperature (Tg) of 240 to 300 ° C and a thermal decomposition temperature (Td) of 500 to 550 ° C. By thermocompression bonding, the adhesion between the cigarette support unit 410 and the film heater unit 420 is improved to increase heat transfer efficiency.

The thermoplastic polyimide resin may include diamine and dianhydride. At this time, the diamine is ODA (4,4-oxydianiline), PPDA (para-phenylenediamine), BAPP (2,2-Bis (4- (4-amino phenoxy) phenyl) propane), m-BAPS (bis (4- (3-aminophenoxy)phenyl)Sulfone) and at least one selected from TPE-R(1,3-Bis(4-aminophenoxy)benzene) may be used. In addition, as the dianhydride, at least one of pyromellitic dianhydride (PMDA), diphenyl tetra carboxylic acid dianhydride (BPDA), 4,4'-bispheno A dianhydrie (BPADA), and Benzophenone tetracarboxylic acid dianhydride (BTDA) may be used. .

The heat dissipation filler is dispersedly disposed in the thermoplastic polyimide resin. As described above, heat dissipation characteristics can be improved by maximizing heat transfer efficiency by dispersing and disposing a heat dissipation filler having thermal conductivity in the thermoplastic polyimide resin and compounding it.

The heat dissipation filler is preferably added in an amount of 20 to 50 parts by weight based on 100 parts by weight of the thermoplastic polyimide resin. When the amount of the heat dissipation filler added is less than 20 parts by weight based on 100 parts by weight of the thermoplastic polyimide resin, it may be difficult to improve heat transfer efficiency. Conversely, when the amount of the heat dissipation filler is greater than 50 parts by weight based on 100 parts by weight of the thermoplastic polyimide resin, the content of the thermoplastic polyimide resin is relatively decreased, so that it may be difficult to secure heat resistance and adhesion.

In this case, the heat dissipation filler is preferably carbon black (carbon balck), carbon nanotubes (carbon nanotube), and at least one of carbon-based fillers including graphene (graphene) is used.

In addition, the heat dissipation filler may use one or more of oxide-based fillers including boron nitride, silicon oxide, zinc oxide, and aluminum oxide.

It is preferable to use the heat dissipation filler having an average diameter and length of 50 to 30,000 nm. When the average diameter and length of the heat dissipation filler is less than 50 nm, there is a problem in that adhesive strength and heat resistance are lowered due to a problem of dispersibility as the size is miniaturized. Conversely, when the average diameter and length of the heat-dissipating filler exceed 30,000 nm, the thickness of the thermoplastic polyimide resin is increased to increase deformability and thermal resistance.

The heat insulating layer 440 is formed for the purpose of increasing the heat insulating effect of the film-type heater unit 420 . To this end, the heat insulating layer 440 is disposed to surround the film-type heater unit 420 .

The heat insulating layer 440 may have heat resistance of 300° C. or higher, and may be formed of any one of a polymer material including a plurality of pores, a ceramic material, and a polymer-ceramic composite material. For example, polyimide having many pores may be used as a material of the heat insulating layer 440 .

A first surface treatment coating layer 446 for blocking pores is formed on at least one of the exposed upper surface, lower surface, and side surfaces of the heat insulating layer 440 so that the pores existing therein are not connected to the outside. That is, the heat insulating layer 440 prevents the penetration of the liquid component by blocking the internal pores by the first surface treatment coating layer 446 formed on the bottom, the top and the bottom, or the outside including the same, or the inside and the outside including the same. can be prevented As such, by blocking the pores connected to the outside, it is possible to prevent the liquid from permeating into the heat insulating layer 440 due to the capillary phenomenon generated by the surface tension of the pores.

In the present invention, the film-type heater unit 420 and the heat insulating layer 440 are spaced apart from each other at regular intervals, and an air gap 450 is located in the space between the film-type heater unit 420 and the heat insulating layer 440 . It is desirable to design it so that

The entire air gap 450 between the film-type heater unit 420 and the heat insulating layer 440 may exist as an empty space. Accordingly, the air gaps 450 may be continuously formed at intervals of 50 μm to 2 mm.

Here, the air gap 450 preferably has an interval of 50 μm to 2 mm, and 300 to 1,500 μm may be presented as a more preferable range. When the interval between the air gaps 450 is less than 50 μm, there is a fear that the heat transfer efficiency to the inside of the cigarette support 410 is not good. Conversely, when the distance between the air gaps 450 exceeds 2 mm, the heat insulation effect may be reduced due to excessive setting of the gap.

As described above, in the present invention, by applying the heat insulating layer 440 of the air gap structure spaced apart from the film-type heater unit 420 at regular intervals, heat transfer to the cigarette support unit 410 is minimized to increase the heat transfer efficiency to the outside. be able to Accordingly, as heat is concentrated inside the cigarette support 410, the heating time is shortened, thereby minimizing battery consumption.

6 is a perspective view illustrating a film heater structure according to a first modified example of the present invention, and FIG. 7 is an enlarged cross-sectional view of part A of FIG. 6 .

6 and 7, in the first modified example of the present invention, the air gap 450 is interposed between the film-type heater unit 420 and the heat insulating layer 440 at regular intervals on the heat insulating support 445. may exist in part by Accordingly, the air gaps 450 are intermittently formed at intervals of 50 μm to 2 mm.

Here, the heat insulating support 445 is preferably made of a heat insulating material configured so that the pores inside are not connected to the outer surface or the lower portion. As such, since the heat insulating support 445 has a structure in which pores are not exposed, it is possible to prevent in advance moisture or fluid from penetrating into the heat insulating layer 440 due to capillary action.

Also, the heat insulation support 445, like the heat insulation material 440, has heat resistance of 300° C. or higher, and may be made of any one of a polymer material including a plurality of pores, a ceramic material, and a polymer-ceramic composite material. For example, polyimide having many pores may be used as a material of the heat insulation support layer 445 .

In this case, the heat insulation support 445 is preferably provided with a second surface treatment coating layer 448 for blocking pores on at least one of the exposed upper surface, lower surface and side surfaces so that the pores present therein are not connected to the outside. Do. That is, the heat insulation support 445 has the lower part, the upper part and the lower part, or the outside including the same, or the second surface treatment coating layer 448 formed on the inside and the outside including the same, the internal pores are blocked and the penetration of the liquid component is delayed can be prevented in As such, by blocking the pores connected to the outside, it is possible to prevent the liquid from permeating into the heat insulating support 445 due to the capillary phenomenon generated by the surface tension of the pores.

In addition, a gap maintaining member (not shown) may be additionally mounted on the upper and lower surfaces of the heat insulating layer 440 , and the gap maintaining member may be designed to maintain an air gap. Such a gap maintaining member is preferably made of a heat insulating material, and it is good to block the pores or waterproof coating to prevent the liquid component from penetrating through the lower surface or upper and lower surfaces of the heat insulating layer 440 due to capillary action, etc. In addition, it is possible to apply various modifications as long as it has a function of fixing the air gap 450 and a structure that prevents liquid from penetrating into the heat insulating layer 440 .

8 is a perspective view showing a film heater structure according to a second modification of the present invention.

Referring to FIG. 8 , in the case of the second modification of the present invention, the heat insulating layer 440 may be disposed to surround the film-type heater unit 420 in a state in which it is attached to be in close contact with the film-type heater unit 420 . Accordingly, the heat insulating layer 440 and the film heater unit 420 are attached to be in close contact with each other, so that an air gap does not exist between the heat insulating layer 440 and the film heater unit 420 .

Here, the heat insulating layer 440 may have heat resistance of 300° C. or higher, and may be made of any one of a polymer material including a plurality of pores, a ceramic material, and a polymer-ceramic composite material. For example, polyimide having many pores may be used as a material of the heat insulating layer 440 .

Meanwhile, FIG. 9 is a perspective view showing a film heater structure according to a third modified example of the present invention, and FIG. 10 is an enlarged perspective view of the film heater unit of FIG. 9 .

9 and 10 , in the case of the third modification of the present invention, as in the second modification of the present invention, in a state in which the heat insulating layer 440 is attached to be in close contact with the film type heater unit 420 , the film type It may be disposed to surround the heater unit 420 . Accordingly, the heat insulating layer 440 and the film heater unit 420 are attached to be in close contact with each other, so that an air gap does not exist between the heat insulating layer 440 and the film heater unit 420 .

In addition, in the case of the third modification of the present invention, the film-type heater unit 420 includes only the film-type heater 421 , the interlayer adhesive layer 423 , and the protective layer 424 . In this case, the film-type heater unit 421 may include only the film-type heater 421 and the protective layer 424 without the interlayer adhesive layer 423 . Accordingly, the film-type heater unit 420 does not include a film-type temperature sensor. Instead, in the case of the third modification of the present invention, the temperature sensor is not built in the film-type heater unit 420, but may be separately mounted.

11 is a perspective view showing a film heater structure according to a fourth modification of the present invention.

11, in the case of the fourth modification of the present invention, as in the third embodiment of the present invention, the film-type heater unit 420 includes a film-type heater 421, an interlayer adhesive layer 423 and a protection Only layer 424 is included. In this case, the film-type heater unit 421 may include only the film-type heater 421 and the protective layer 424 without the interlayer adhesive layer 423 . Accordingly, the film-type heater unit 420 does not include a film-type temperature sensor. Instead, in the case of the third modification of the present invention, the temperature sensor is not built in the film-type heater unit 420, but may be separately mounted.

In addition, in the case of the fourth modification of the present invention, the air gap 450 may be partially present by the heat insulating support 445 interposed between the film-type heater unit 420 and the heat insulating layer 440 at regular intervals. Accordingly, the air gaps 450 are intermittently formed at intervals of 50 μm to 2 mm.

Here, the heat insulating support 445 is preferably made of a heat insulating material configured so that the pores inside are not connected to the outer surface or the lower portion. As such, since the heat insulating support 445 has a structure in which pores are not exposed, it is possible to prevent in advance moisture or fluid from penetrating into the heat insulating layer 440 due to capillary action.

Meanwhile, FIG. 12 is a photograph showing a film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention. At this time, Fig. 12 (a) is a photograph showing the state before the heat-insulating layer is attached, and Fig. 12 (b) is a photograph showing the state after the heat-insulating layer is attached.

As shown in (a) of Figure 12, it can be seen that the cigarette support and the film-type heater unit is bonded through the heat dissipation adhesive layer, and the film-type heater unit is exposed to the outside.

At this time, as shown in (b) of FIG. 12 , it can be seen that the film-type heater part exposed to the outside is wrapped and protected by a heat insulating layer spaced apart from each other by a predetermined interval so as to have an air gap.

The film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency according to the present invention described above is a film in which a film-type heater and a film-type temperature sensor are mutually bonded through an interlayer adhesive layer, and the film-type temperature sensor is protected by a protective layer By application of the type heater unit, the film type heater and the film type temperature sensor have an integrated structure in which they are integrally coupled.

As a result, since the film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency according to an embodiment of the present invention has an integrated structure in which the film-type heater and the film-type temperature sensor are integrated, the assembly of each part can be simplified. , the assembly time can be reduced by about 30% or more when assembling parts.

In addition, the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention can minimize the temperature delay as well as minimize the temperature delay by applying a film-type temperature sensor integrally coupled with the film-type heater. Compared to the conventional ceramic temperature sensor assembled separately from the heater, the reaction rate to temperature is very fast, so it becomes very easy to control the temperature.

Therefore, in the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention, the film-type heater unit having an integrated structure in which the film-type heater and the film-type temperature sensor are integrated is applied, so that the temperature increase rate is very fast It may be possible to precisely sense the

In addition, in the film heater structure for a cigarette-type electronic cigarette device having excellent thermal efficiency according to an embodiment of the present invention, by applying a heat insulating layer of an air gap structure spaced apart from the film-type heater unit at regular intervals, heat to the outside is minimized while Since it is possible to induce heat to be concentrated inside the cigarette support part, it is possible to minimize battery consumption.

Example

Hereinafter, preferred embodiments will be described to help the understanding of the present invention. However, it is obvious to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention only to illustrate the present invention, and it is natural that such modifications and modifications fall within the scope of the appended claims.

13 is a graph showing the result of measuring the internal temperature change according to the attachment method of the SUS pipe. At this time, in FIG. 13 (a), the film heater part was attached to the SUS pipe using TPI adhesive, and in FIG. 13 (b), the film heater part was attached to the SUS pipe using TPI adhesive, and then it was shrunk with a shrink tube. .

As shown in (a) and (b) of Figure 13, the temperature increase rate and saturation temperature measurement results according to the method of attaching the SUS pipe are shown.

In the case of attachment using only TPI adhesive, the time taken to reach 300° C. was approximately 16 sec. On the other hand, when it was attached using a TPI adhesive and then shrunk with a shrink tube, it took about 23 sec to reach 300°C.

Therefore, it was confirmed that the case of attaching using only the TPI adhesive reached 300° C. faster by about 7 sec.

In addition, the saturation temperature was approximately 360°C, which was similar to each other.

14 is a graph showing the results of evaluating the effect of whether or not the PI insulation layer is attached. At this time, Fig. 14 (a) is a film heater structure to which a PI heat insulating layer is not attached, and Fig. 14 (b) is a film heater structure in which a 150 μm thick PI heat insulating layer is attached to the film heater unit without an air gap.

As shown in (a) and (b) of Figure 14, the temperature increase rate and saturation temperature measurement results according to whether or not the PI insulating layer is attached are shown.

In the case of the film heater structure to which the PI heat insulation layer is applied, the time taken to reach 300 ° C was measured as 19 sec, which was approximately 3 sec slower than the 16 sec time taken for the film heater structure without the PI heat insulation layer to reach 300 ° C. The internal saturation temperature was measured to be 390°C, confirming that it was approximately 30°C high.

15 is a graph showing a result of evaluating the effect of whether an air gap is formed. At this time, Fig. 15 (a) is a film heater structure in which a 150 μm thick PI heat insulating layer is attached to the film heater unit without an air gap, and Fig. 15 (b) is a 150 μm thick PI heat insulating layer with an air gap of 500 μm. It is a film heater structure attached to the film heater so as to have a

As shown in (a) and (b) of Figure 15, the temperature increase rate and saturation temperature measurement results according to the presence or absence of an air gap are shown.

At this time, in the case of the film heater structure to which the PI insulation layer having an air gap is applied, the time taken to reach 300° C. was measured to be approximately 16 sec. On the other hand, the time it took for the film heater structure to which the PI insulation layer without an air gap was applied to reach 300°C was measured to be approximately 19 sec.

Therefore, it was confirmed that the case of the film heater structure to which the PI insulation layer having an air gap was applied was about 3 sec faster.

In addition, the film heater structure to which the PI insulation layer having an air gap is applied has a saturation temperature of about 420 ° C. did

In the above, the embodiments of the present invention have been mainly described, but various changes or modifications can be made at the level of those skilled in the art to which the present invention pertains. Such changes and modifications can be said to belong to the present invention without departing from the scope of the technical spirit provided by the present invention. Accordingly, the scope of the present invention should be judged by the claims described below.

400: film heater structure for cigarette-type electronic cigarette device
410: cigarette support
420: film-type heater unit
430: heat dissipation adhesive layer
440: protective layer
450: air gap
H: Cigarette fixture

Claims (17)

a cigarette support for supporting a cigarette;
a film-type heater unit disposed on the outside of the cigarette support unit to heat the cigarette bound to the cigarette support unit;
a heat dissipation adhesive layer disposed between the cigarette support and the film heater to bond the cigarette support and the film heater; and
Including; a heat insulating layer disposed to surround the film-type heater unit;
The film-type heater unit includes a film-type heater having a heating pattern; a film-type temperature sensor laminated on the film-type heater and having a sensing pattern; an interlayer adhesive layer disposed between the film-type heater and the film-type temperature sensor to bond the film-type heater and the film-type temperature sensor; a protective layer disposed on the film-type temperature sensor to protect the film-type temperature sensor; a heater pad electrically connected to the heating pattern of the film heater; and a flexible connector for sensor connection having a sensing connection pattern electrically connected to the sensing pattern of the film-type temperature sensor;
The film-type heater consists of a laminated structure in which 2 to 4 layers are vertically stacked,
The flexible connector for sensor connection has a connector body and a sensing connection pattern disposed inside the connector body and electrically connected to the sensing pattern of the film-type temperature sensor, and a stiffener is disposed at an end of the flexible connector for sensor connection and a sensing terminal electrically connected to the sensing connection pattern is disposed on a rear surface of the stiffener,
The film-type heater unit film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it has a total thickness of 100 ~ 200㎛.
According to claim 1,
The heat insulating layer is made of a heat insulating material having a plurality of pores therein,
The heat insulation layer is formed with a first surface treatment coating layer for blocking pores on at least one of the exposed upper surface, lower surface and side surfaces so that the pores present therein are not connected to the outside, so that the liquid component is blocked from penetrating. Film heater structure for cigarette-type e-cigarette devices with excellent thermal efficiency.
According to claim 1,
Film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that the film-type heater unit and the heat insulating layer are spaced apart from each other at regular intervals, and an air gap is located in the space between the film-type heater unit and the heat insulating layer .
4. The method of claim 3,
The air gap is
Cigarette-type electronic cigarette with excellent thermal efficiency, characterized in that the entire space between the film-type heater unit and the heat insulating layer is present as an empty space, or is partially present by an insulating support interposed at regular intervals between the film-type heater unit and the heat insulating layer Film heater structure for device.
4. The method of claim 3,
The air gap is
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it is intermittently or continuously formed at intervals of 50 μm to 2 mm.
5. The method of claim 4,
The lower portion of the insulating support is
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it is made of an insulating material with no pores connected to the outside or blocked pores.
According to claim 1,
The heat dissipation adhesive layer is
thermoplastic polyimide resins; and
a heat dissipation filler dispersedly disposed in the thermoplastic polyimide resin;
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, comprising:
According to claim 1,
The heat dissipation adhesive layer is
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it has a thickness of 0.1 to 100 μm.
delete delete delete According to claim 1,
The insulating layer is
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it has heat resistance of 300° C. or more and is made of any one of a polymer material, a ceramic material, and a polymer-ceramic composite material having a plurality of pores.
According to claim 1,
Film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that the film-type heater unit and the heat insulating layer are spaced apart from each other at regular intervals, and an air gap is located in the space between the film-type heater unit and the heat insulating layer .
14. The method of claim 13,
The air gap is
Cigarette-type electronic cigarette with excellent thermal efficiency, characterized in that the entire space between the film-type heater unit and the heat insulating layer is present as an empty space, or is partially present by an insulating support interposed at regular intervals between the film-type heater unit and the heat insulating layer Film heater structure for device.
14. The method of claim 13,
The air gap is
A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that it is intermittently or continuously formed at intervals of 50 μm to 2 mm.
15. The method of claim 14,
The heat insulating support is a film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency, characterized in that the exposed parts of the upper surface, the lower surface and the side are made of an insulating material that has no pores connected to the outside or the pores are blocked.
15. The method of claim 14,
The heat insulating support is made of a heat insulating material having a plurality of pores therein,
The heat insulation support is formed with a second surface treatment coating layer for blocking pores on at least one of the exposed upper surface, lower surface and side surfaces so that the pores present therein are not connected to the outside, so that the liquid component is blocked from penetrating. A film heater structure for a cigarette-type electronic cigarette device with excellent thermal efficiency.

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