KR101705505B1 - Fabrication of ready-to-drink cold brew coffee - Google Patents

Abstract

The present invention relates to a method of manufacturing a diluted Dutch coffee beverage by installing an extraction apparatus in an extraction chamber sealed from the outside, and inserting ground coffee and extraction water into the extraction apparatus to manufacture a raw Dutch coffee liquid. According to the present invention, the method comprises the following steps of: installing an ozone generator in the extraction chamber, and maintaining the inside of the extraction chamber in a sterilizing environment and sterilizing the extraction apparatus by ozone generated from the ozone generator; using the ozone generator to manufacture ozone water; storing the ozone water at room temperature for two hours or longer to maintain an ozone content with a range of 0.1 to 2 mg/L; supplying the ozone water to the extraction apparatus; extracting the raw Dutch coffee liquid with the extraction apparatus while maintaining the inside of the extraction chamber in the sterilizing environment by the ozone generated from the ozone generator; inserting the extracted raw Dutch coffee liquid into a mixer and mixing purified water in a ratio of 1:5 to 1:10 with respect to the raw Dutch coffee liquid to manufacturing a diluted Dutch coffee beverage; bottling the manufactured diluted Dutch coffee beverage; sterilizing the bottled diluted Dutch coffee beverage at 100 to 150C for 5 to 30 seconds; and cooling the sterilized diluted Dutch coffee beverage.

Description

{Fabrication of ready-to-drink cold brew coffee}

The present invention relates to a method of manufacturing Dutch coffee, and more particularly, to a method for manufacturing a Dutch coffee diluted beverage which can be stored at room temperature and greatly improves long-term flowability, thereby improving the merchantability and enhancing the value of the product through environmentally friendly processing .

Coffee is a typical food that is consumed globally as a dark beverage that is made from coffee bean grinded with hot water. Along with the advancement of human society, coffee drinking methods have changed in various forms. One of them is Dutch coffee, which has become popular recently.

Dutch coffee is naturally designed in the process of moving European coffee from Africa to Europe and other places. At that time, the ship had difficulty in using fire because it was made of wood. So, the way to drink coffee with cold water for a long time is known as the origin of today's Dutch coffee. Dutch coffee is smoother and more fragrant than the existing boiled coffee, and the number of people looking for it continues to increase. This Dutch coffee is called "Cold brew coffee" in English. It literally means coffee that pours cold water. Dutch coffee is generally made by putting coffee beans in a container and letting it stand with water for a long time. It is a method of making a leachable Dutch coffee, and a dropping method of dropping water into a ground coffee bean for a long time. Can be divided. These Dutch coffees are extracted at low temperatures, so they are more popular with coffee lovers because of their less acidity, rich fragrance and deep flavor of coffee compared to boiled and extracted coffee.

Unlike general food manufacturing methods, Dutch coffee is required to produce a specially designed new method because it can not be sterilized for the purpose of preventing the growth of microorganisms and extending the shelf life after product production. Existing Dutch coffee makers have secured the safety of the Dutch coffee. In order to secure the safety of the water used in the production of Dutch coffee, they have controlled the microbial propagation of water by using a filter, chlorine disinfection or heat disinfection. However, this method has a disadvantage that it deteriorates the quality of the Dutch coffee, and it is a fact that the shelf life is only 3 months in addition to the difficulty of storing the product in the refrigerator when it is made into the market.

Conventionally, the Dutch coffee-related technique is a technique (for example, Patent Document 10-2014-0040452) for extracting mechanism or a technique for including other components in coffee extraction (for example, Patent Document 10-2015-0109075) A method of extracting a crude coffee liquor has been proposed, but a product such as instant diluted beverage using a crude coffee liquor has not been proposed.

As the ice coffee market expands, the popularity of Dutch coffee is increasing. Despite the recent explosive growth of Dutch coffee, Dutch coffee still remains a minor in the coffee market. It is a favorite food with a rich flavor and deep taste. However, due to the hassle of having to dilute it at a certain rate just before drinking, there is a limit to the place that you should drink at a coffee shop or at home and office. Because.

For this reason, a new type of diluted Dutch coffee drink that can be used immediately without restriction of time and place while maintaining the original taste and flavor of the Dutch coffee is needed. In particular, it is urgent to develop an environmentally friendly sterilization process that can maintain the safety and quality of ready-to-drink (RTD) coffee packaged for immediate drinking and a technology capable of long-term room-temperature distribution.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method for manufacturing a diluted hot coffee in a hot coffee using a crude coffee stock solution prepared by maintaining the safety and quality of the hot coffee, will be.

Another object of the present invention is to provide a method of manufacturing a diluted hot coffee of a coffee which can be stored at room temperature and circulated at room temperature, thereby reducing storage and distribution costs.

It is another object of the present invention to provide a method for manufacturing a Dutch coffee diluted beverage which can increase the shelf life even under room temperature storage.

Other objects and technical features of the present invention will be more specifically described in the following detailed description.

In order to achieve the above object, the present invention provides a method for preparing a crude coffee stock solution by providing an extraction mechanism in an extraction chamber sealed with the outside, and using the ground coffee and extraction water in the extraction mechanism; A step of disposing an ozone generator in the extraction chamber, maintaining the sterilizing atmosphere in the extraction chamber with ozone generated in the ozone generator, sterilizing the extraction mechanism, preparing the ozonated water produced using the ozonated water generator, Maintaining the ozone content in the range of 0.1 mg / L to 2 mg / L by storing the ozone water at room temperature for more than 2 hours, supplying the ozone water to the extraction mechanism, Extracting the crude coffee liquor from the extractor into the extractor; adding the extracted crude coffee liquor to the purified water in a mixing machine at a ratio of 1: 5 to 1:10 based on the purified water; Feeding the prepared Dutch coffee diluted beverage, sterilizing the fed Dutch coffee diluted beverage at 100 to 150 DEG C for 5 to 30 seconds, And cooling the coffee diluted beverage.

In the present invention, the ozonated water is allowed to flow at a rate of 0.1 to 10 ml / min to the extraction mechanism while maintaining the ozonated water at a temperature in the range of 10 ° C to 30 ° C during the extraction of the crude coffee liquor, Is extracted.

Further, in the present invention, it is preferable that the ozonated water generator generates ozone by using atmospheric pressure low temperature plasma, and supplies ozone water by supplying oxygen and water.

According to the present invention, it is possible to provide a special extraction environment in which sterilization treatment can be continuously maintained in the production of Dutch coffee, and it is possible to prevent the water used for extraction, And the circulation at room temperature becomes possible.

In addition, the produced crude coffee liquor can be diluted at a certain ratio in a blender to provide a ready-to-drink Dutch coffee diluted beverage, and the RTD beverage can be sterilized directly by being fed through an automatic filling machine to produce a safe and clean Dutch coffee diluted The beverage production process and system can be constructed.

Especially, purified water used for crude coffee juice and diluted drinks is purified and used in Jeju Island in advance. By using ozone water generated by ozone generator using atmospheric pressure low temperature plasma, safe and healthy Dutch coffee Diluted beverage can be produced. The diluted coffee of the Dutch coffee produced according to the present invention can be stored and distributed for not less than one year at room temperature in the range of 20 to 30 ° C as well as refrigerated storage, thereby contributing greatly to the diffusion and expansion of Dutch coffee as a popular drink.

Figure 1 is a photograph of the extraction room for producing the Dutch coffee of the present invention
2 is a photograph showing an ozone generator installed inside the extraction chamber
3 is a photograph showing an ozonated water generating device used for Dutch coffee
4 is a photograph showing the extraction process of crude coffee
5 is a photograph showing a blender for diluting the crude coffee stock solution with purified water
Figure 6 is a photograph showing a rotary automatic filler feeding a Dutch coffee diluted drink
7 is a photograph showing the process of sterilizing a Dutch coffee diluted drink
8 is a photograph showing a diluted drink of Dutch coffee and a Dutch coffee prepared according to the present invention

The present invention proposes a method for producing a ready-to-drink Dutch coffee diluted beverage directly using a crude coffee stock solution. More specifically, the present invention provides a method for producing a Dutch coffee diluted beverage by diluting a crude coffee stock solution at a certain ratio in a blender so as to be able to drink immediately, blending it using a rotary filler, and sterilizing it with a high temperature instant sterilization method (HTST).

In the case of Dutch coffee produced according to the present invention, the whole process is carried out by a sterilization process. Specifically, ozonated water is used for extracting coffee from a Dutch coffee, and the inside of the extraction chamber is maintained in an ozone sterilizing atmosphere before and during extraction, .

More specifically, the present invention provides an extracting mechanism in an extraction chamber sealed with the outside, extracts coffee using ozone water when producing the Dutch coffee using the coffee and the extracting water pulverized in the extraction mechanism, Extraction is continued while maintaining the extraction chamber and extraction mechanism in a sterile atmosphere. Fig. 1 shows an extraction chamber for producing Dutch coffee according to the present invention. A large number of extraction mechanisms are provided inside the extraction chamber and are hermetically sealed from the outside to block the inflow of harmful substances.

As shown in FIG. 2, an ozone generator is installed in the extraction chamber to keep the inside of the extraction chamber in a sterilizing atmosphere by ozone generated in the ozone generator. Ozone gas continuously sterilizes airborne bacteria, which may exist at the entrance, extraction mechanism and table. In addition to the ozone generator, a sanitary management device capable of eliminating harmful insects and the like can be added to the extraction chamber.

In the present invention, ozone water produced by using an ozone water generator for generating ozone by atmospheric pressure low-temperature plasma is manufactured and used. 3 is a photograph showing an ozonated water generating device used in the Dutch coffee production method of the present invention. The apparatus includes a dissolving pipe for passing water from an outside through an inlet port, an oxygen generator, a micro plasma device for generating ozone by supplying oxygen generated from the oxygen generator, and a micro plasma generator for generating ozone A venturi injector for injecting ozone water into the dissolving pipe; a storage tank for storing ozone water generated by mixing water passing through the dissolving pipe with ozone injected from the venturi injector; And a pump for transferring water introduced from the outside to the dissolution pipe. In the micro plasma apparatus, a plurality of microchannels are formed in an insulative support, and oxygen supplied from the oxygen generator passes through the microchannel to generate ozone.

Micro-plasma, which is a low pressure plasma at atmospheric pressure, is a plasma having a size of several tens to several thousands of micrometers in diameter, and can generate an excellent cold plasma at less than about 2000 V Thus eliminating the need for a large cooling device or heat sink for heat dissipation. The ozonated water generator used in the present invention can reduce the cost of manufacturing a crude coffee liquor having a small scale of equipment, environmentally friendly sterilization, low energy consumption, and improved safety and flowability.

The ozonated water produced in the ozonated water generator is preferably stored at room temperature for 2 hours or more to maintain the ozone content in the range of 0.1 mg / L to 2 mg / L. The ozonated water is supplied to the extraction mechanism, and the crude coffee liquid is extracted into the extraction device with the inside of the extraction chamber kept in a sterilizing atmosphere by the ozone generated in the ozonizer. FIG. 4 shows a process in which the crude coffee liquid is extracted through the extraction mechanism in the extraction chamber.

The ozonated water used for the extraction of crude coffee stock can be used at a temperature in the range of 4 to 30 占 폚. When extracting the crude coffee liquid, the ozonated water flowing into the extraction device can be dripped while maintaining the speed of 0.1 to 10 ml / min. The time for extracting the crude coffee juice while flowing the ozonated water can be varied depending on the extraction amount, the extraction speed, the temperature of the ozonated water, and the amount of the coffee bean, and the crude coffee seed solution can be extracted for 3 to 24 hours.

The prepared crude coffee liquor can be stored at room temperature, the shelf life is extended, the flowability is improved, and the distribution cost is reduced, which is very advantageous in securing price competitiveness. In particular, it is possible to eliminate the problem of disinfection cost and environment burden in combination with conventional chlorine disinfection, alcohol disinfection, and heat disinfection, and it is possible to establish an environmentally friendly manufacturing process.

In the state where the crude coffee ground liquid is maintained in a sterilized atmosphere with ozone, the crude coffee ground solution is added to the blender and mixed at a ratio of 1: 5 to 1:10 with respect to the purified water and the undiluted solution to prepare a hot coffee diluted drink. Manufactured Dutch coffee diluted beverages are sterilized at 100 ~ 150 ℃ for 5 ~ 30 seconds in a fed state and immediately cooled to improve storage stability and flowability. Particularly, dilute drinks of instant hot drinkable Dutch coffee diluted with ozonated water as purified water have an advantage of improving the shelf life to one year or more at room temperature due to increased shelf life.

Hereinafter, the process for producing a diluted hot coffee drink according to the present invention will be described in more detail with reference to specific examples.

Example

a) Dutch coffee extract

Coffee beans used for coffee extraction were Ethiopian Yirgacheffe G2, a G2 grade coffee grown in the city of Yaegatchepe in Ethiopia in the year 2013. The roasted roasted beans at 225 ° C for 15 minutes were sealed, kept frozen, and ground with a grinder just prior to extraction.

The pulverized beans were extracted using a Dutch coffee extracting machine (1 liter triple, Mika coffiee). The water used for the extraction was ozone water manufactured by using an ozone generator manufactured by Ozone Aid Co., Ltd. The ozone water was stored at room temperature for more than 2 hours to sufficiently reduce the ozone half-life and to maintain the ozone content at 0.5 mg / L or less. The extract was poured in 60 ml of ozone water for 10 minutes, pre-wetted, and then 540 ml was flowed at a rate of 2 ml / min for 4 hours and 30 minutes, and left for 30 minutes to extract the excess coffee. During the extraction process and extraction process, the sterilization conditions in which the ozone is generated are maintained in the extraction chamber.

b) Manufacture of Dutch coffee diluted drinks

30 liters of the crude coffee stock solution was transferred to a 300 liter blender (300 liters) as shown in Fig. 5, and mixed with purified water. As the purified water, ozonated water prepared by the same method as that described above was used, and diluted coffee was diluted with 210 liters of ozone water to make a Dutch coffee diluted drink.

c) Feeding dilute drink with Dutch coffee using filler and sterilization

Diluted Dutch coffee diluted beverages were bottled into PET bottles using a rotary automatic filler (see FIG. 6) capable of blocking the growth of microorganisms and capable of blocking moisture from a bottle of 340 ml per minute at a rate of 20 injections per minute.

A Dutch coffee diluted beverage was prepared by sterilizing Dutch coffee diluted beverages fed through a filling machine in a sterilizer of FIG. 7 by a high-temperature instant sterilization method (HTST) at 135 DEG C for 15 seconds.

After sterilization was completed, the Dutch coffee diluted beverage was cooled to room temperature. FIG. 8 is a photograph showing a diluted coffee with a Dutch coffee and a Dutch coffee prepared according to the present invention. FIG. When compared to the right dutch coffee stock, the left diluted beverage is a little lighter in color. The diluted beverage can be stored for at least 6 months at room temperature and can be stored for more than 1 year in refrigerated storage, thus ensuring the stability of RTD coffee beverage. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modified, modified, or improved.

Claims (1)

A method for preparing Dutch coffee using an extraction mechanism in an extraction chamber sealed with the outside and using coffee ground and extraction water in the extraction mechanism;
Providing an ozone generator in the extraction chamber, maintaining the inside of the extraction chamber in a sterilizing atmosphere with ozone generated in the ozone generator, and sterilizing the extraction mechanism,
Preparing ozone water produced using an ozonated water generator,
Maintaining the ozonated water at room temperature for 2 hours or more to maintain the ozone content in the range of 0.1 mg / L to 2 mg / L,
Supplying the ozone water to the extraction mechanism,
Extracting the crude coffee liquor from the extractor with the ozone generated in the ozone generator while maintaining the inside of the extraction chamber in a sterilizing atmosphere,
Adding the extracted crude coffee stock solution in a blender, mixing the blended product in a ratio of 1: 5 to 1: 10 with respect to the purified water and the undiluted solution to prepare a Dutch coffee diluted beverage,
Feeding the produced Dutch coffee diluted beverage into the mouth coffee, sterilizing the fed Dutch coffee diluted beverage at 100 to 150 DEG C for 5 to 30 seconds,
Cooling the sterilized Dutch coffee diluted beverage,
Wherein the ozonated water is kept at a temperature in the range of 4 to 30 DEG C and the ozonated water is supplied to the extraction mechanism at a rate of 0.1 to 10 ml / min to extract the Dutch coffee for 3 to 24 hours. Way.

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