KR20220107556A - Tumbler adjustable temperature with low power for a long time - Google Patents

Abstract

The present invention relates to a tumbler, capable of long-time temperature control with low power. Specifically, the present invention relates to the tumbler with improved thermal efficiency and ease of use by enabling long-time temperature control with low power through uniform heat supply as a whole. The tumbler comprises: a body capable of storing beverages; a cover capable of opening and closing the body; and a planar heating element.

Description

Tumbler adjustable temperature with low power for a long time

The present invention relates to a tumbler capable of controlling the temperature for a long time with low power. Specifically, the present invention relates to a tumbler with improved thermal efficiency and ease of use by enabling temperature control for a long time with low power through uniform heat supply as a whole.

A tumbler is a type of cup used to drink a beverage, and generally has a heat preservation and cold storage function that blocks heat exchange with the outside, so that the heat or cold of a hot or cold beverage can be maintained for as long as possible.

Recently, the demand for tumblers is increasing due to the spread and spread of beverages such as coffee and the demand to reduce the use of disposable cups due to environmental problems. There is a limit in blocking heat exchange with the outside, and since the warming and cooling functions are insufficient, it is inconvenient for the user to drink hot or cold beverages at an appropriate temperature.

In addition, there was a conventional tumbler equipped with a separate heat supply function, but there was a problem in that the duration of the heating function was shortened due to high power consumption, and it was difficult to heat uniformly as a whole.

Therefore, there is an urgent need for a tumbler with improved thermal efficiency and ease of use by enabling temperature control for a long time with low power through uniform heat supply as a whole.

An object of the present invention is to provide a tumbler with improved thermal efficiency and ease of use by enabling temperature control for a long time with low power through uniform heat supply as a whole.

In order to solve the above problems, the present invention,

a body capable of storing beverages; and a cover capable of opening and closing the main body, further comprising a planar heating element that is embedded in the frame forming the main body and generates heat by receiving power from a battery or charging device that can be coupled to the main body, tumbler provides

Here, the planar heating element includes a lower heating part, a pair of electrodes spaced apart from each other in a predetermined pattern on the lower heating part, and an upper heating part formed on the electrode, wherein the lower heating part and the upper heating part are each A tumbler is provided, which is formed from a conductive silicone rubber composition.

In addition, the conductive silicone rubber composition provides a tumbler, characterized in that it comprises a silicone rubber and conductive particles dispersed in the silicone rubber.

And, the conductive silicone rubber composition provides a tumbler, characterized in that the silicone rubber and the conductive particles are heated and kneaded at 120° C. or higher.

Furthermore, the silicone rubber includes a silicone rubber of HTV (High Temperature Vulcanizing) in a gel state or Liquid Silicon Rubber (LSR) in a liquid state, and the conductive particles include carbon black or acetylene black, a tumbler provides

Here, the conductive particles have a particle size of 30 to 50 nm, a specific surface area (BET) of 60 to 100 m 2 /g, and a bulk density of 0.001 to 0.1 g/cc, and the surface of the conductive particles is hydrophilically modified. To provide a tumbler.

On the other hand, the conductive silicone rubber composition provides a tumbler, characterized in that it further comprises a plasticizer and a curing agent.

Here, the plasticizer provides a tumbler, characterized in that it comprises a methylvinyl siloxane polymer having a hydroxyl group (-OH) at both ends and a vinyl group in the side chain.

In addition, based on 100 parts by weight of the silicone rubber, the content of the conductive particles is 60 to 70 parts by weight, the content of the plasticizer is 1 to 10 parts by weight, and the content of the curing agent is 0.4 to 20 parts by weight, characterized in that the tumbler provides

Furthermore, the electrode has a metal plate shape, and the electrode provides a tumbler, characterized in that one or more through-holes are provided.

And, the electrode provides a tumbler, characterized in that it includes a stranded wire or a braided wire in which a metal wire is combined.

On the other hand, the main body is a temperature sensor for measuring the temperature of the stored beverage, a temperature display unit for displaying the temperature measured by the temperature sensor, a touch unit that can set the temperature of the beverage, and heating and maintaining the temperature set by the touch unit It provides a tumbler, characterized in that it further comprises a control unit for.

The tumbler according to the present invention is a planar heating element that can realize a sufficient heating function with low power inside the body frame, so that it is possible to control the temperature for a long time with low power through uniform heat supply as a whole. .

1 schematically shows the configuration of a tumbler according to the present invention.
Figure 2 schematically shows a perspective view of a planar heating element applied to the tumbler according to the present invention.
3 schematically shows a cross-sectional view of the planar heating element shown in FIG. 2 .
4 is a thermal imaging camera photograph during heat generation of each of the planar heating elements in Examples 1 and 2;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and the spirit of the invention may be sufficiently conveyed to those skilled in the art. Like reference numbers refer to like elements throughout.

1 schematically shows the configuration of a tumbler according to the present invention.

As shown in FIG. 1 , the tumbler 100 according to the present invention may include a main body 110 that can store drinks, etc. and a cover 130 that can open and close the main body 110 .

Here, the main body 110 has a temperature sensor (not shown) for measuring the temperature of the stored beverage, a temperature display unit 111 for displaying the temperature measured by the temperature sensor, and a touch unit 112 for setting the temperature of the beverage. By additionally including a control unit (not shown) for heating and maintaining the temperature set by the touch unit 112, etc., the user checks the temperature of the beverage stored in the main body 110 and adjusts it while checking the temperature of the beverage at an appropriate temperature. can be consumed

In addition, the cover 130 has a structure detachable from the opening of the main body 110 and can supply the beverage inside the main body 110 to the outside to the user while being fastened to the opening of the main body 110 . It may include an outlet of the.

On the other hand, the planar heating element 120 is embedded in the frame forming the main body 110, specifically between the inner plate 110a and the outer plate 110b of the side wall and/or the bottom wall of the lower part of the frame. A planar heating element 120 to be described later is inserted in, and the planar heating element 120 receives power through a separate control unit and heats up by heating it through the inner plate 110a to heat the beverage stored inside the main body 110. Heat and maintain temperature.

In addition, since the planar heating element 120 is basically made of a material that can implement a heat insulating function, when the beverage stored inside the main body 110 is a cold beverage, a cooling function may be implemented instead of a rapid heat function.

The tumbler 100 according to the present invention may be supplied with the power required to the planar heating element 120 by being coupled to a separate battery 200 or coupled to a separate charging device (not shown). That is, the user can carry and use the battery 200 by coupling the tumbler 100 to the tumbler 100 while the user is moving. .

When the battery 200 is also not in use, it can be charged by being coupled to the charging device (not shown), and the charging device (not shown) may include a terminal to which a cable for receiving power from the outside can be connected. have.

Here, the input voltage of the charging device (not shown) is 110 to 220 V AC, the used voltage/current of the tumbler 100 is AC 5V, 2A, and the battery 200 has a charging time of about 1 hour and a usage time. For about 3 hours, a lithium-ion battery with a power consumption of 10 W and an energy capacity of 25 Wh (5,000 mAh) can be used.

Specifically, FIG. 2 schematically shows a perspective view of a planar heating element applied to a tumbler according to the present invention, and FIG. 3 schematically shows a cross-sectional view of the planar heating element shown in FIG. 2 .

2 and 3, the planar heating element 120 has a lower heating part 121, a pair of electrodes 122 spaced apart from each other in a predetermined pattern on the lower heating part 121, the electrode It may include an upper heating part 123 formed on the 122, and the like.

Here, the pair of electrodes 122 may have a plate shape made of a metal such as copper, aluminum, or an alloy thereof, or may be formed of a stranded wire or braided wire in which a plurality of metal wires are combined.

When the pair of electrodes 122 has a metal plate shape, one or more through-holes 122a spaced apart in the longitudinal direction of the electrode 122 may be additionally provided as shown in FIGS. 3 and 4 , , since the heating parts 121 and 123 are formed in such a way that the conductive silicone rubber composition forming the heating parts 121 and 123 fills the inside of the through hole 122a, the pair of electrodes 122 is connected to the lower heating part ( 121) and the upper heating part 123 may be firmly coupled without coming out easily.

On the other hand, when the pair of electrodes 122 is formed of a twisted wire or a braided wire in which a plurality of metal wires are combined, the lower heating part 121 and the upper heating part are disposed between the metal wires constituting the twisted wire or the braided wire. Since the conductive silicone rubber composition forming the part 123 is cured in a penetrating state, the heating parts 121 and 123 and the electrode 122 may be more firmly coupled.

When power is supplied from the outside through the pair of electrodes 122 , current flows through the lower heating part 121 and the upper heating part 123 disposed between the pair of electrodes 122 , and the lower heating part The lower heating part 121 and the upper heating part 123 generate heat due to the specific resistance of 121 and the upper heating part 123 .

Specifically, the lower heating part 121 and the upper heating part 123 may be formed by heating, compressing, and curing the conductive silicone rubber composition, respectively. Here, the conductive silicone rubber composition may include a silicone rubber of high temperature vulcanizing (HTV) or liquid silicon rubber (LSR) in a gel state and conductive particles dispersed in the silicone rubber, and additionally a plasticizer, a curing agent and the like, and the conductive particles may include carbon black, acetylene black, and the like.

Here, in the conductive silicone rubber composition, the silicone rubber and conductive particles are heated and kneaded at a temperature of 120° C. or higher, preferably 150° C. or higher, thereby improving the fluidity of the silicone rubber and improving the dispersibility of the conductive material in the silicone rubber, thereby improving the heating element. It is possible to implement the workability, appearance, volume resistance reduction, and resistance uniformity improvement of the sheet.

In the conductive silicone rubber composition, based on 100 parts by weight of the silicone rubber, the content of the conductive particles is 60 to 70 parts by weight, the content of the plasticizer is 1 to 10 parts by weight, and the content of the curing agent is 0.4 to 20 parts by weight. can

Here, when the content of the conductive particles is less than the standard, the resistance of the heat generating parts 121 and 123 is excessive and it is difficult to control the heat, whereas when the content of the conductive particles exceeds the standard, it is difficult to disperse in the silicone rubber and agglomerate with each other. 121,123) may rapidly increase and be non-uniform.

In addition, the conductive particles may have a particle size of 30 to 50 nm, a specific surface area (BET) of 60 to 100 m 2 /g, and a bulk density of 0.001 to 0.1 g/cc, wherein the particle size of the conductive particles is less than the standard. Otherwise, if the specific surface area exceeds the standard, it is difficult to disperse in the silicone rubber and agglomerate with each other, so that the resistance of the heating units 121 and 123 may increase rapidly and may be non-uniform.

Further, the conductive particles may modify the hydrophilicity of the surface through acid treatment, ozone treatment, oxygen plasma treatment, etc. to improve dispersibility in the silicone rubber, and the oxygen plasma treatment is performed using an oxygen plasma device (13.56 MHz). , 0.1Kpa, 60W) can be used for more than 30 minutes.

On the other hand, the plasticizer further improves the dispersibility of the conductive particles in the silicone rubber, and performs a function of further improving the fluidity, moldability, flexibility, etc. of the conductive silicone rubber composition, for example, It may include a methylvinyl siloxane polymer having a hydroxyl group (-OH) at both ends and a vinyl group in the side chain.

In particular, the methylvinyl siloxane polymer having a hydroxyl group (-OH) at both ends and a vinyl group at the side chain increases the interfacial bonding force with the conductive particles surface-modified with a hydroxyl group (-OH) at both ends to be hydrophilic, Since the vinyl group of the side chain has excellent bonding strength with the silicone rubber, the internal bonding strength and electrical conductivity of the heating units 121 and 123 may be improved.

In addition, the curing agent performs a function of accelerating curing of the conductive silicone rubber composition in manufacturing the heating parts 121 and 123 from the conductive silicone rubber composition.

The thickness of each of the lower heating part 121 and the upper heating part 123 may be 0.5 to 5 mm, provided between the lower heating part 121 and the upper heating part 123 and having different polarities. The pair of electrodes 122 may be spaced apart from each other by a distance of 7 to 15 cm, and the electrode 122 may be made of a metal such as copper, silver, aluminum, or an alloy thereof.

This planar heating element 120 has an average volume resistance of 2.5 to 12 Ω·cm, preferably 4 to 9 Ω·cm, and the standard deviation of the volume resistance, that is, the resistance uniformity, that is, the temperature uniformity is 8 to 25, preferably 11 to 23, heat of 100 to 120°C when 12V is applied, and heat of about 250°C when 24V is applied, and in particular, power consumption based on maintaining 200°C may be about 34 to 37 Wh. As a result, uniform heat generation is achieved with minimal power, and at the same time, it does not cause damage due to overcurrent or overheating due to the failure of local resistance control.

[Example]

1. Preparation example

A conductive silicone rubber composition was prepared by kneading the components shown in Table 1 below in an amount. The unit of the content shown in Table 1 below is parts by weight.

Specifically, the silicone rubber and the plasticizer are put into a kneader equipped with a mixer blade and stirred at 80° C. and 30 rpm for 10 minutes, then the conductive material is divided into thirds and slowly added while heating and kneading or simply kneading. Stir. Next, 2 to 20 parts by weight of hydrosilicone is added, stirred at 80° C. and 30 rpm for 20 minutes, and collected, then a curing agent is mixed and blended 20 times using a two-roll mill, the upper heating part and the lower heating part having a thickness of about 2 mm Each part is manufactured. A planar heating element was manufactured by arranging a pair of copper electrodes at an interval of 10 cm between the manufactured upper heating part and the lower heating part.

Example comparative example One 2 3 4 One 2 3 4 5 silicon
rubber 100 100 100 100 100 100 100 100 100 plasticizer 1 10 10 5 5 10 10 10 plasticizer 2 10 10 conductive material 1 70 60 70 70 conductive material 2 70 60 70 conductive material 3 60 40 hardener 2 2 2 2 2 2 2 2 2 kneading 1 2 hours 2 hours 2 hours 2 hours 2 hours 2 hours 2 hours 2 hours kneading 2 2 hours

- Silicone rubber: methylvinylsiloxane gum

- Plasticizer 1: Methylvinyl siloxane polymer having both terminal hydroxyl and side chain vinyl groups

- Plasticizer 2: Methyl siloxane polymer having both terminal hydroxy and side chain methyl groups

- Conductive material 1: Acetylene black (particle diameter: 48 nm; specific surface area: 39 m2/g; density: 0.15 g/cc; surface treatment: oxygen plasma treatment)

- Conductive material 2: Acetylene black (Particle size: 48 nm; Specific surface area: 39㎡/g; Density: 0.15 g/cc; Surface treatment: No treatment)

- Conductive material 3: Acetylene black (Particle size: 23 nm; Specific surface area: 133㎡/g; Density: 0.05 g/cc; Surface treatment: No treatment)

- Hardener: 2,5-dimethyl 2,5-di(t-butylperoxy)hexane paste (45%)

- Kneading 1: Heat kneading (170℃)

- Kneading 2: Simple kneading (80℃)

2. Physical property evaluation

1) Sheet workability evaluation

Examples and Comparative Examples When the time required for curing the heating element sheet is 3 hours or less in the manufacture of each of the planar heating elements, ◎ when it is 3 hours or less, ○ when it exceeds 3 hours and 5 hours or less, and × when it exceeds 5 hours.

2) Appearance evaluation

Examples and Comparative Examples Evaluation of the bubble state on the surface of the planar heating element in each of the diameter 100um or more surface bubbles in the case of 3 or less ◎, if more than 3 and less than 5, ○, if more than 5 ×.

3) Volume resistance evaluation

After measuring the volume resistance at random 5 places of each of the planar heating elements in Examples and Comparative Examples, the average value was calculated. The average volume resistance should be between 2.5 and 12 Ω·cm.

4) Resistance uniformity evaluation

After measuring the volume resistance at random 5 places of each of Examples and Comparative Examples, the average value was calculated, and the standard deviation was calculated therefrom. In case of excess, it is ×.

The evaluation results are shown in Table 2 and FIG. 4 below.

Example comparative example One 2 3 4 One 2 3 4 5 sheet workability ◎ ○ ◎ ○ × ○ ○ ○ × Exterior ◎ ○ ◎ ○ ○ ○ × × × volume resistance 4.0 6.0 8.0 9.0 200.0 800.0 20.0 40.0 200.0 resistance uniformity ◎ ○ ◎ ○ × × ○ × ×

As shown in Tables 2 and 4, the planar heating elements of Examples 1 to 4 according to the present invention are excellent in sheet workability, appearance, volume resistance, resistance uniformity, etc. to realize uniform heating with minimum power At the same time, it was confirmed that it did not cause damage due to overcurrent and overheating due to the failure of local resistance control.

On the other hand, in the planar heating element of Comparative Example 1, the surface of the conductive material added to the heating element is not treated as hydrophilic, so compatibility with silicone rubber, that is, the dispersibility in the silicone rubber decreases, the workability of the heating element sheet decreases, the volume resistance increases, Problems such as a decrease in resistance uniformity occurred, and in the planar heating element of Comparative Example 2, the surface of the conductive material added to the heating element was not treated as hydrophilic, and the content of the conductive material was less than the standard. , the volume resistance and resistance uniformity were further reduced.

In addition, in the planar heating element of Comparative Examples 3 and 4, because the plasticizer added to the heating element did not have a vinyl group in the side chain, the internal bonding force of the heating element was lowered, so that the volume resistance increased and the problem of poor appearance occurred, especially the planar heating element of Comparative Example 4 The conductive material also has problems such as poor appearance of the heating element sheet, increase in volume resistance, and decrease in resistance uniformity due to compatibility with silicone rubber, that is, a decrease in dispersibility in silicone rubber, because the surface of the conductive material is not treated as hydrophilic.

Finally, in the planar heating element of Comparative Example 5, simple kneading, not heat kneading, is applied when mixing the silicone rubber and the conductive material, so that the fluidity of the silicone rubber is lowered and the dispersibility of the conductive material in the silicone rubber is lowered, so that the workability of the heating element sheet , problems such as appearance, increase in volume resistance, and decrease in resistance uniformity occurred.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, all of them should be considered to be included in the technical scope of the present invention.

100: tumbler 200: battery

Claims (12)

a body capable of storing beverages; and
and a cover capable of opening and closing the main body,
Further comprising a planar heating element that is embedded in the frame forming the main body and receives power from a battery or a charging device that can be coupled to the main body to generate heat. The method of claim 1,
The planar heating element includes a lower heating part, a pair of electrodes spaced apart from each other in a predetermined pattern on the lower heating part, and an upper heating part formed on the electrode, wherein the lower heating part and the upper heating part are each conductive silicon A tumbler formed from a rubber composition. 3. The method of claim 2,
The conductive silicone rubber composition is a tumbler, characterized in that it comprises a silicone rubber and conductive particles dispersed in the silicone rubber. 4. The method of claim 3,
The conductive silicone rubber composition is a tumbler, characterized in that the silicone rubber and the conductive particles are heated and kneaded at 120° C. or higher. 4. The method of claim 3,
The silicone rubber includes a silicone rubber of HTV (High Temperature Vulcanizing) in a gel state or Liquid Silicon Rubber (LSR) in a liquid state,
The conductive particles include carbon black or acetylene black, a tumbler. 6. The method of claim 5,
The conductive particles have a particle size of 30 to 50 nm, a specific surface area (BET) of 60 to 100 m 2 /g, and a bulk density of 0.001 to 0.1 g/cc,
A tumbler, characterized in that the surface of the conductive particles is modified to be hydrophilic. 7. The method according to any one of claims 2 to 6,
The conductive silicone rubber composition is characterized in that it further comprises a plasticizer and a curing agent, a tumbler. 8. The method of claim 7,
The plasticizer is a tumbler, characterized in that it comprises a methylvinyl siloxane polymer having a hydroxyl group (-OH) at both ends and a vinyl group in the side chain. 8. The method of claim 7,
Based on 100 parts by weight of the silicone rubber, the content of the conductive particles is 60 to 70 parts by weight, the content of the plasticizer is 1 to 10 parts by weight, the content of the curing agent is 0.4 to 20 parts by weight, a tumbler. 7. The method according to any one of claims 2 to 6,
The electrode has a metal plate shape,
The electrode is characterized in that one or more through-holes are provided, tumbler. 6. The method according to any one of claims 1 to 5,
The electrode is a tumbler, characterized in that it comprises a stranded wire or a braided wire in which the metal wire is combined. 7. The method according to any one of claims 1 to 6,
The main body is a temperature sensor for measuring the temperature of the stored beverage, a temperature display unit for displaying the temperature measured by the temperature sensor, a touch unit that can set the temperature of the beverage, and heating and maintaining the temperature set by the touch unit Characterized in that it further comprises a control unit, tumbler.

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