KR101931451B1 - Low temperature maintenance hopper for roasted coffee grinder - Google Patents

Abstract

The present invention relates to a hopper for a coffee bean grinder for preserving aroma and taste of coffee beans in a fresh state. The hopper for a coffee bean grinder includes: a body part; a lid part; and a handle part. In the body part, a vacuum space is formed between an inner wall and an outer wall, and an upper part is opened. The lid part opens and closes the top of the body part while a storage groove for storing a cooling member is recessed at the center. The handle part is detachably coupled to the storage groove to shield the storage groove.

Description

TECHNICAL FIELD [0001] The present invention relates to a low temperature maintenance hopper for roasted coffee grinder,

The present invention relates to a hopper for a coffee bean grinder for preserving the aroma and taste of a coffee bean in a fresh state. More specifically, the present invention relates to a hopper for a coffee bean grinder that keeps the temperature inside the hopper at a low temperature without requiring a separate power- The present invention relates to a hopper for a coffee bean grinder for maintaining a low temperature that can confirm the temperature inside the hopper from outside.

Generally, after harvesting the fruit of a coffee tree, remove the flesh and dry the seed. The coffee bean is roasted at 230 to 235 degrees Celsius for about 10 minutes. The process of frying the coffee beans at high temperature is called roasting. During roasting, the tissue of the bean is rapidly expanded by moisture and carbon dioxide (CO ₂ ), and numerous pores are formed into a network structure. , Fiber, carbohydrate, caffeine, organic acid, and tannin are activated, and a large amount of carbon dioxide and volatile fragrance components are generated inside the pores. That is, the ingredients can be activated through roasting and the coffee can have a variety of flavors.

In this roasting process, about 87% of the gas is released, but the remaining gas is captured in the pores inside the expanded beans in the form of volatile fragrance and carbon dioxide (CO ₂ ). Therefore, the aroma of the coffee beans is most abundant and fresh immediately after roasting.

However, the aroma of the coffee beans rapidly oxidizes from the moment of exposure to oxygen in the air, and the original fresh aroma is lost or altered. At this time, the temperature around the coffee bean has a fatal effect on the oxidative deterioration of coffee and the loss due to volatilization.

Therefore, as a method of preventing the loss of volatile flavor compounds of freshly roasted coffee beans and minimizing the contact with oxygen in the air in most cases, it is necessary to add an aroma valve called "One-Way-Valve" . The aroma valve is opened by the pressure of CO ₂ generated from the coffee bean and is discharged to the outside. Since the air outside the packaging material is prevented from moving inside, the coffee bean inside the packaging material is spoiled by oxygen in the air It is a means to prevent.

However, the coffee beans transferred from the packaging material to the coffee grinder hopper are immediately brought into contact with the air and are either lost or become rapidly deteriorated by the high heat transferred from the grinder chamber during storage. In addition, since the coffee beans filled in the hopper are difficult or difficult to transfer to the packaging material until they are completely emptied, the coffee beans left in the hopper remain in the hopper until they are reused or the next day, Of course, there is a problem that the rancidity progresses rapidly.

On the other hand, roasted coffee beans are subjected to a grinding (grinding or grinding) process in which the coffee beans are pulverized into a powder form through a grinder. Here, a commercially available grinder is called a burr grinder, and classified into a conical burr and a flat burr according to the shape of the grinding chamber portion.

The conical culver is formed in a funnel shape with the chamber portion being cut by a blade rotating at a high speed as the inserted bean is pressed, and the coffee powder is moved to the lower portion of the funnel. The flat burr is formed in a horizontal shape in the chamber portion, and the charged coffee bean is crushed while being hit by a high-speed centrifugal force against a flat disk-shaped grinding chamber.

Most commercial coffee grinders used in coffee shops are made rigid enough to grind a large amount of high duty cycle and the structure is made of transparent plastic to store roasted coffee beans on top of the coffee grinder A hopper for storing a material, a gate for guiding a certain amount of coffee beans to the grinding disk, a doser for storing a certain amount of coffee beans to be pulverized, a coffee bean A grinding chamber for pulverizing, a container for receiving pulverized coffee powder, and the like.

That is, the coffee grinder breaks the coffee beans, which have been put into a small particle powder form, by friction due to twisting and cutting by a sharp blade by a blade of a grinding chamber rotating at a high speed (1,200 rpm) using a high-speed electric motor as a power. In particular, when a large amount of coffee is continuously crushed, a large amount of heat is generated in the motor itself rotating at a high speed, and a large amount of frictional heat is generated in the process of cutting the coffee bean while twisting at a high speed. Actually, when the coffee bean grinder was continuously used for 10 minutes, the temperature of the grinder motor chamber was 87 degrees Celsius, the temperature of the grinding chamber was 48 degrees, the temperature of the ground coffee particles was 12 Respectively.

Therefore, the fragrance component of the ground coffee powder is rapidly lost or deteriorated by the frictional heat generated when the heat and the bean delivered from the high-speed rotary motor are cut off, which adversely affects the aroma quality of the coffee.

Particularly, in the case of espresso coffee, since the fragrance of the espresso and the fine bubbles (crema) are formed by pulverizing into a very small particle form, a lot of heat generated in the pulverization process has a fatal effect on the taste of the espresso coffee.

In addition, the heat generated inside the coffee grinder expands the chamber of the metallic material, so that the particles are not uniform and the incense and taste are not constant, and even the coffee powder is clumped or dried by heat to generate static electricity There is a problem that it is difficult to discharge the powder from the chamber.

In order to solve such a problem, in recent U.S. Pat. No. 8,826,803 (registered on Apr. 19, 2014), a cooling fan is installed on the high-speed motor shaft at the lower part of the chamber and the wall of the grinder lid (housing) To improve the structure. However, such a structure has a problem that the heat inside the housing surrounding the grinder can be a certain degree, but the heat generated from the chamber itself, that is, the coffee beans can not discharge much heat generated by frictional heat with the metal during the grinding process .

In addition, when continuous grinding is performed, there is a problem in that a higher speed is generated by a high-speed motor, and a separate electric power is required to drive the cooling fan attached to the lower portion of the motor shaft, do. Accordingly, there is a desperate need to improve a hopper for a coffee bean grinder to make a coffee having a perfume that is most important in coffee quality by preserving the aroma of the bean as fresh as possible, but there is no revolutionary method to date.

Disclosure of the Invention A problem to be solved by the present invention is to provide a cooling member inside a hopper in which a coffee bean is stored, thereby immediately cooling the heat applied to the coffee bean during operation of the grinder, thereby suppressing the clumping of the ground coffee particles by frictional heat And to provide a hopper for a coffee bean grinder for preventing a volatile flavor inherent in coffee beans from being volatilized by heat, thereby improving the aroma quality of the extracted coffee and maintaining the low temperature.

The present invention also provides a gasket between the body part and the lid part to prevent outside air from flowing into the hopper in which the coffee bean is stored, thereby preventing the coffee bean from being spoiled by the outside air, Is prevented from entering the inside of the hopper and adsorbed on the coffee beans, thereby minimizing the fragrance loss of the coffee beans stored in the hopper at the time of crushing and preventing bad odors, thereby improving the freshness of the coffee beans. And a hopper for a coffee bean grinder.

To achieve the above object, according to the present invention, a hopper for a coffee grinder includes a body part, a lid part, and a handle part. A vacuum space is formed between the inner wall and the outer wall of the body part, and the upper part is opened. The lid part opens and closes the upper part of the body part, and a receiving groove for storing the cooling member is formed at the center. The handle portion is detachably coupled to the storage groove portion to shield the storage groove portion.

According to an embodiment of the present invention, the body portion is formed with a temperature indicator for outputting the temperature inside the body portion to the outside.

According to one embodiment, the temperature indicator is formed as a printed strip of temperature indicating ink whose color changes according to the temperature inside the body part, and is attached to the body part.

According to one embodiment, the temperature indicator further includes a freshness checker for outputting a specific pattern or phrase if the temperature in the body is below a predetermined value.

According to one embodiment, at least one of the contact surfaces of the body part and the lid part is provided with a gasket.

According to one embodiment, the body portion is formed of a transparent plastic material.

According to one embodiment, the transparent plastic includes at least one of polyethylene, polystyrene, ethylene vinyl alcohol (EVOH), polycarbonate, and acryl.

According to one embodiment, a valve for removing air introduced into the vacuum space is installed on the outer wall of the body part.

According to one embodiment, a plurality of through holes are formed in the bottom surface of the receiving groove portion.

According to one embodiment, a heat insulating member is provided on a part of the bottom surface of the lid part.

According to one embodiment, the cooling member is formed of a hydrogel material.

A hopper for a coffee bean grinder according to the present invention includes a transparent body part, a lid part, a handle part, and a temperature display part. The transparent body portion has a vacuum space formed between the inner wall and the outer wall, and the upper portion is opened. The lid part opens and closes the upper part of the transparent body part, and a receiving groove for storing the cooling member is formed at the center thereof. The handle portion is detachably coupled to the storage groove portion to shield the storage groove portion. The temperature display unit is installed on the inner wall of the body part to output the temperature inside the transparent body part to the outside.

According to one embodiment, the temperature indicator is formed as a strip printed with temperature indicating ink whose color changes according to the temperature inside the transparent body part, and is attached to the transparent body part.

According to one embodiment, the temperature display unit further includes a freshness checking unit that outputs a specific pattern or phrase if the temperature in the transparent body unit is less than a predetermined value.

According to one embodiment, at least one of the contact surfaces of the transparent body part and the lid part is provided with a gasket.

According to one embodiment, the transparent body includes at least one of polyethylene, polystyrene, ethylene vinyl alcohol (EVOH), polycarbonate (PC), and acryl.

According to one embodiment, a valve for removing air introduced into the vacuum space is installed on the outer wall of the transparent body part.

According to one embodiment, a plurality of through holes are formed in the bottom surface of the receiving groove portion.

According to one embodiment, a heat insulating member is provided on a part of the bottom surface of the lid part.

According to one embodiment, the cooling member is formed of a hydrogel material, and the cooling member of the hydrogel material may form a thin water film on the surface of the coffee bean inside the hopper.

According to the present invention, by providing the cooling member inside the hopper, the heat source that is transmitted to the coffee bean can be cooled quickly during operation of the grinder. Accordingly, it is possible to prevent the fragrance of the beans from being suddenly lost or deteriorated by the heat during the operation of the grinder, and the incense of the original coffee beans can be delivered to the tester.

Further, since the gasket is provided between the body part and the lid part, the inside of the body part is in a state where the inflow of air from the outside is blocked at a low temperature, and the bad smell of the inside of the coffee shop is introduced into the hopper, . In addition, the carbon dioxide generated from the fresh coffee beans minimizes the contact with the outside air, thereby preventing the roasting of the coffee beans from being corrupted and minimizing the leakage of the aroma of the coffee beans to the outside of the hopper, thereby improving the freshness of the coffee beans .

Further, since the vacuum space is formed between the inner wall and the outer wall of the body part, the efficiency of the cooling member can be improved and the replacement time of the cooling member can be delayed.

Further, a thin water film is formed on the surface of the coffee beans inside the hopper by the cooling member to prevent the static electricity of the ground coffee particles.

In addition, the body portion is provided with a temperature display portion for outputting the internal temperature to the outside, so that the temperature inside the body portion can be output to the outside in real time. A freshness confirmation part for outputting a specific pattern or phrase according to the temperature value in the body part is formed, so that the freshness state of the beans stored in the body part can be visually confirmed. The cooling member can be replaced at an appropriate time by recognizing the replacement time of the cooling member through the temperature display unit or the freshness checking unit.

1 is a perspective view of a hopper for a coffee bean grinder according to an embodiment of the present invention;
Fig. 2 is a side view showing the inside of the hopper for the coffee bean grinder shown in Fig. 1; Fig.
Fig. 3 is a top view of the lid portion in Fig. 1; Fig.
Fig. 4 is a view showing the lower part of the lid part in Fig. 1; Fig.
Fig. 5 is a view showing an example in which the hopper shown in Fig. 1 is installed in a coffee bean grinder. Fig.

Hereinafter, a hopper for a coffee bean grinder according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and repeated descriptions and known functions and configurations that may obscure the gist of the present invention will not be described in detail. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 1 is a perspective view of a hopper for a coffee bean grinder according to one embodiment of the present invention, and FIG. 2 is a side view showing the inside of a hopper for a coffee bean grinder shown in FIG. Fig. 3 is a view showing the upper part of the lid part in Fig. 1, and Fig. 4 is a view showing the lower part of the lid part in Fig.

1 to 4, a hopper 100 for a coffee bean grinder includes a body 110, a lid 120, and a handle 130.

The body 110 includes an inner wall 111 defining a space for storing the coffee beans and an outer wall 112 surrounding the outer wall 111. The upper portion of the body 110 may be a funnel. At this time, the body part 110 is formed of a transparent plastic material and may be referred to as a "transparent body part ".

Specifically, the body 110 is made of a transparent plastic material including at least one of polyethylene, polystyrene, ethylene vinyl alcohol (EVOH), polycarbonate (PC), and acryl . For example, the body 110 may be formed of one selected from the group consisting of polyethylene, polystyrene, ethylene vinyl alcohol, polycarbonate, and acrylic, and at least two of them may be selected and combined. That is, the body 110 may be formed of a single material or a composite material.

Since the body part 110 is formed of a transparent material, the amount of the beans stored in the body part 110 can be visually confirmed, so that the bean can be immediately supplied to the body part 110 when the bean is insufficient .

A vacuum space 113 may be formed between the inner wall 111 and the outer wall 112 of the body 110. Since the heat conduction and the convection are blocked through the vacuum space 113, the temperature inside the body 110 can be kept constant.

In order to compensate for the above disadvantage, the outer wall 112 of the body 110 may be provided with a vacuum space 113 for introducing air into the vacuum space 113, A valve 114 for removing air may be installed. In general, the vacuum maintenance period is about 4 months to 6 months. At this time, if the valve 114 is opened and the valve 114 is connected to the vacuum pump, the air introduced into the vacuum space 113 can be removed. However, the period of removing the air is not limited to the illustrated example, and may be varied depending on the temperature maintenance period inside the body 110. [ The valve 114 for removing the air inside the body 110 is preferably formed of a check valve 114, but is not limited thereto.

The lid part 120 opens and closes the upper part of the body part 110 and the receiving groove part 121 for storing the cooling member 10 is recessed at the center. As the cooling member 10 is disposed in the storage groove 121 as described above, the cool air of the cooling member 10 flows into the inside of the body 110 and the temperature inside the body 110 can be lowered. At this time, since the vacuum space 113 is formed between the inner wall 111 and the outer wall 112 of the body 110, the temperature inside the body 110 can be maintained at a low temperature for a long time. For example, when the cooling member 10 is disposed in the storage groove 121 at a room temperature, the temperature inside the body 110 can be kept about 10 ° C lower than the temperature outside the body 110.

Specifically, the cooling member 10 may be formed of a hydrogel material. The hydrogel is harmless to the human body, has no leakage of water, and has a high retaining ability of cold storage than ice. In addition, if the cooling ability is lost, the refrigerator can be repeatedly used for a certain period of time in the freezer room, so that the temperature inside the body 110 can be effectively lowered without any additional power.

The hydroentangling cooling member 10 may form a water film on the surface of the coffee beans stored in the hopper 100. That is, as the temperature inside the body 110 is lowered by the cooling member 10 made of hydrogel, minute moisture particles are formed inside the body 110 due to a temperature difference with the outside of the body 110 , And the water particles form a water film on the surface of the coffee bean. Thus, since the ground coffee bean particles adhere to the discharge port of the hopper 100 to block the inlet of the discharge port, or the coffee bean particles adhere to the inner wall of the storage container, Can be prevented.

A plurality of through holes 121a may be formed in the bottom surface of the storage groove 121 in order to more effectively supply the cool air of the cooling member 10 to the body 110 and prevent the condensation phenomenon. The size and the number of the through holes 121a are not limited and can be appropriately adjusted in consideration of the size and shape of the storage groove 121 and the cooling member 10. [

A heat insulating member 140 may be installed on a part of the bottom surface of the lid 120. The heat insulating member 140 is installed on the bottom surface of the lid 120 so that the cooling holding force of the cooling member 10 can be further improved. The heat insulating member 140 is formed on the entire bottom surface of the lid 120 so as not to interfere with the through hole 121a without interfering with the body 110 when the lid 120 is closely contacted with the body 110. [ .

Referring to FIG. 4, at least one of the contact surfaces of the body 110 and the lid 120 may be provided with a gasket 150. In the present embodiment, a description will be made mainly on the state where the gasket 150 is attached to the cover 120. [

The gasket 150 may be in the form of an O-ring and may be inserted and fixed in a recessed manner in the groove of the gasket 150 formed along the inner circumference of the lid 120. The gasket 150 may be provided at a lower portion thereof with a fixing groove portion into which a portion of the upper portion of the body 110 is fitted.

Accordingly, when the upper part of the body part 110 is shielded through the lid part 120, it is possible to prevent the outside air from flowing into the inside of the body part 110, Is prevented from being introduced into the inside of the coffee beans and adsorbed on the coffee beans. Here, the gasket 150 may be formed of a silicone material having excellent airtightness.

The handle 130 is detachably coupled to the storage groove 121 to shield the storage groove 121. The coolant of the cooling member 10 stored in the storage groove 121 is prevented from flowing out to the outside so that the cooling holding time of the cooling member 10 .

The method of coupling the handle 130 to the receiving groove 121 may be variously implemented. For example, as shown in FIG. 3, a plurality of 'L' -shaped projections 131 are formed along the outer periphery of the handle 130, and protrusions 131 are inserted around the inside of the storage groove 121 The protrusions 131 may be formed so that the protrusions of the protrusions 131 are inserted into and engaged with the engaging recesses 132. As shown in FIG. That is, when the knob part 130 is rotated in a state where one side of the coupling groove part 132 and the projection 131 are disposed opposite to each other, the projection 131 is inserted into the coupling groove part 132, And is coupled to the groove 121.

A screw may be formed on the outer periphery of the handle 130 and the inner periphery of the storage groove 121 so as to couple the grip 130 and the storage groove 121 to each other. Accordingly, when the handle 130 and the coupling groove 132 are engaged with each other, the handle 130 and the lid 120 are formed as a single body, so that the upper portion of the body 110 is opened, 110). ≪ / RTI > Conversely, when the coupling between the handle 130 and the coupling groove 132 is released, the cooling member 10 in the storage groove 121 can be replaced by opening the upper portion of the storage groove 121.

The body 110 may include a temperature indicator 160 for outputting the temperature inside the body 110 to the outside. Specifically, the temperature display unit 160 may be formed as a strip printed with a temperature indicating ink whose color changes according to the temperature inside the body 110.

This temperature indicating ink may be a Zion ink. Zion ink is a special pigment that is transparent at a temperature above a certain value and has a specific color at a temperature lower than a certain value. For example, if a sliver ink having a gray color of less than 25 ° C is printed on a red strip, if the temperature in the body 110 is less than 25 ° C, the strip is gray and if the temperature in the body 110 is 25 Above ℃, the strip may show red color. Of course, the color of the strip and the color of the Zion ink can be appropriately adjusted, and the temperature can also be displayed as a number.

Accordingly, if the color of the strip is red, the user can confirm that the internal temperature of the body 110 has risen, and the cooling member 10 can be replaced. At this time, if a specific phrase, for example, a message indicating the replacement of the cooling member 10 is displayed on the strip, the user can more effectively induce the replacement of the cooling member 10.

The temperature display unit 160 may be attached to the inner wall 111 of the body 110. This is because the outer wall 112 of the body part 110 is slow in heat conduction from the inside of the body part 110 due to the vacuum space 113. In this case, since the body 110 is made of a transparent plastic material, the color change of the temperature indicator 160 can be checked even if the temperature indicator 160 is attached to the inside of the body 110.

 The temperature display unit 160 may further include a freshness checking unit 170 that outputs a specific pattern or phrase if the temperature in the body 110 is less than a predetermined value. The freshness checking unit 170 may be formed by applying the above-described Zion ink to the inner wall 111 of the body 110 with a specific pattern or phrase.

For example, if a symbol pattern is directly printed on the inner wall 111 of the body 110 as shown in FIG. 2 or a sticker of a bean symbol is attached to the body 110, Appear or disappear. If the temperature within the body 110 is less than 20 ° C, then the bean symbol is displayed. If the temperature in the body 110 is more than 20 ° C, the bean symbol disappears will be. Accordingly, the user can visually check the freshness state of the beans stored in the body part 110.

As described above, since the hopper 100 for a coffee bean grinder is provided with the cooling member 10 therein, it is possible to rapidly cool the heat source that is transmitted to the coffee bean in operation of the grinder 1. Accordingly, it is possible to prevent the fragrance of the beans from being suddenly lost or deteriorated by the volatilization due to the heat during the operation of the grinder 1, and to transmit the original coffee aroma to the tasting person.

In addition, since the gasket 150 is provided between the body 110 and the lid 120, the inside of the body 110 is shut off from the outside in a low temperature state. Thus, it is possible to prevent the coffee beans roasted by the outside air from being corroded, to block off bad odors introduced from the outside, to minimize the outflow of the aroma of the coffee beans to the outside of the hopper, thereby improving the freshness of the coffee beans .

In addition, since the vacuum space 113 is formed between the inner wall 111 and the outer wall 112 of the body 110, the efficiency of the cooling member 10 can be improved and the replacement time of the cooling member 10 can be reduced .

In addition, the body 110 has a temperature display unit 160 for outputting the internal temperature to the outside, so that the temperature inside the body 110 can be output to the outside in real time. The freshness checking unit 170 is provided to output a specific pattern or phrase according to the temperature value in the body 110 so that the freshness state of the beans stored in the body 110 can be visually confirmed. The cooling member 10 can be replaced at an appropriate time by recognizing the replacement timing of the cooling member 10 through the temperature display unit or the freshness checking unit 170.

Fig. 5 is a view showing an example in which the hopper shown in Fig. 1 is installed in a coffee grinder. An example of using the hopper 100 for a coffee bean grinder will be described with reference to FIG.

First, after the hopper 100 is installed in the grinder 1, the lid 120 is separated from the body 110 by grasping the handle 130. The lid 120 is again mounted on the body 110 to cover the opened upper portion of the body 110. At this time, the gasket 150 is installed in the body part 110, and when the upper part of the body part 110 is shielded through the lid part 120, air is prevented from flowing into the body part 110, It is possible to prevent rancidity.

Then, the handle 130 is opened to insert the cooling member 10 into the storage groove 121, and then the handle 130 is closed again. The cool air of the cooling member 10 can be introduced into the body 110 by the plurality of through holes 121a formed in the lower portion of the storage groove 121. At this time, a vacuum space 113 is formed between the inner wall 111 and the outer wall 112 of the body 110, so that the cooling efficiency of the cooling member 10 can be improved.

When the grinder 1 is operated in this state, the coffee beans inside the body 110 are twisted to generate frictional heat, and the heat generated by the motor 11 of the grinder 1 is received. When the heat is applied to the coffee bean, the incense of the coffee bean is rapidly lost or altered, so that the incense of the coffee can not be felt. According to the present invention, the heat transmitted to the coffee bean is rapidly cooled . That is, the freshness of the coffee beans can be maintained by the cooling member 10.

Meanwhile, a strip printed with a sialon ink is formed on the body 110, so that the temperature inside the body 110 can be output to the outside. As the temperature inside the body 110 is output to the outside in real time, the cooling member 10 can be replaced at an appropriate time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10. Cooling Member
110 .. body part 111 .. inner wall
112 .. exterior wall 113 .. vacuum space
114 .. valve 120 .. lid portion
121 .. storage groove part 130 .. handle part
140 .. Insulation member 150 .. Gasket
160. Temperature display unit 170. Freshness check unit

Claims (21)

A body portion having a vacuum space formed between the inner wall and the outer wall and having an open top;
A lid part which opens and closes the upper part of the body part and in which a storage groove for storing a cooling member is formed in a recessed shape; And
And a handle portion detachably coupled to the storage groove portion to shield the storage groove portion,
A plurality of through holes are formed in the bottom surface of the storage groove portion,
And the lid portion includes a heat insulating member provided on a part of the bottom surface of the lid portion so as not to block the through hole.
The method according to claim 1,
Wherein the body part is provided with a temperature display part for outputting a temperature inside the body part to the outside.
3. The method of claim 2,
The hopper for a coffee bean grinder attached to the body part, wherein the temperature display part is a strip printed with a temperature indicating ink whose color changes according to a temperature inside the body part.
The method of claim 3,
Wherein the temperature indicator further comprises a freshness checker for outputting a specific pattern or phrase if the temperature in the body is below a predetermined value.
The method according to claim 1,
And a gasket is provided on at least one of contact surfaces of the body part and the lid part.
The method according to claim 1,
Wherein the body is formed of a transparent plastic material.
The method according to claim 6,
Wherein the transparent plastic includes at least one of polyethylene, polystyrene, ethylene vinyl alcohol (EVOH), polycarbonate (PC), and acryl.
The method according to claim 1,
And a valve for removing the air introduced into the vacuum space is installed on the outer wall of the body part.
delete delete The method according to claim 1,
Wherein the cooling member is formed of a hydrogel material.
A transparent body portion having a vacuum space formed between the inner wall and the outer wall and having an open top;
A lid part which opens and closes the upper part of the transparent body part and in which a storage groove for storing a cooling member is formed in a recessed shape;
A handle portion detachably coupled to the storage groove portion to shield the storage groove portion; And
And a temperature indicator disposed on an inner wall of the body to output a temperature inside the transparent body to the outside,
A plurality of through holes are formed in the bottom surface of the storage groove portion,
A heat insulating member is provided on a part of the bottom surface of the lid part, and the heat insulating member is formed so as not to block the through hole.
13. The method of claim 12,
Wherein the temperature display unit is a strip printed with a temperature indicating ink whose color changes according to a temperature inside the transparent body part, and is attached to the transparent body part.
14. The method of claim 13,
Wherein the temperature indicator further comprises a freshness checker for outputting a specific pattern or phrase if the temperature in the transparent body is below a predetermined value.
13. The method of claim 12,
And a gasket is provided on at least one of the contact surfaces of the transparent body part and the lid part.
13. The method of claim 12,
Wherein the transparent body portion includes at least one of polyethylene, polystyrene, ethylene vinyl alcohol (EVOH), polycarbonate (PC), and acryl.
13. The method of claim 12,
And a valve for removing the air introduced into the vacuum space is installed on the outer wall of the transparent body part.
delete delete 13. The method of claim 12,
Wherein the cooling member is formed of a hydrogel material.
21. The method of claim 20,
The hopper for a coffee bean grinder in which the cooling member of the hydrogel material forms a water film on the surface of the coffee bean inside the hopper.

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