KR102437735B1 - Liquid coffee sterilization system that minimizes the deterioration of coffee's unique taste and aroma - Google Patents

Abstract

The present invention relates to a liquid coffee sterilization system that minimizes the deterioration of the original taste and aroma of coffee, and is capable of sterilizing liquid coffee, which is difficult to sterilize due to solid components, to a nearly sterilization level while preserving the original taste and aroma of coffee. it was made appropriate.
The present invention is provided with a first heat exchanger and a second heat exchanger through which liquid coffee transferred by the pumping of a transfer pump passes, and in the first heat exchanger, the liquid coffee is rapidly heated and sterilized while passing through a high-temperature heating medium, In the second heat exchanger, the liquid coffee sterilized in the first heat exchanger is rapidly cooled while passing through the low-temperature cooling water, and the first heat exchanger and the second heat exchanger minimize the time delay in the state where the liquid coffee is heat-sterilized and immediately It is characterized in that it is sequentially arranged in the vicinity so that it can be rapidly cooled.

Description

Liquid coffee sterilization system that minimizes the deterioration of coffee's unique taste and aroma

The present invention relates to a liquid coffee sterilization system, and more particularly, to a liquid coffee sterilization system that is suitable for preserving the unique taste and aroma of coffee while sterilizing liquid coffee that is difficult to sterilize due to solid content at a sterilization level.

In general, coffee is roasted and ground to a certain size, then drip coffee made by pouring hot water over it in a filter medium, or espresso extracted by passing hot water through high-pressure ground coffee beans that are finely ground and compressed. In addition, in recent years, the cold brew method, in which water or cold water at room temperature is dropped for 7 to 10 hours on finely ground coffee beans, and extracted slowly for a long time, is on the rise.

Cold brew is coffee brewed for a long time using cold or room temperature water. The coffee extract is extracted by the drip method and the leaching method. The drip method is a method in which the brewed coffee drips from the container one by one. It is a method of extracting the undiluted solution by filtering the residue.

Since this cold brew is extracted over a long period of time, it has less bitterness than regular coffee extracted with hot water in a short time, and has the advantage of being mild and soft. quality will be greatly affected. The extracted coffee juice is sealed and stored in the refrigerator, and if it is aged at a low temperature for a day or two, the flavor will be more vivid. Rather than drinking the undiluted solution as it is, it is common to dilute it with milk, syrup, or water or add ice to drink according to your taste.

Recently, efforts are being made to develop devices for extracting and commercializing such Dutch coffee. For example, Korean Patent Publication No. 1398674 discloses a Dutch coffee extraction apparatus, and Korean Patent Registration No. 1711850 discloses a large capacity Dutch coffee extraction apparatus.

However, in the case of this prior art, there is a problem in that the original taste and aroma of coffee are lost during the extraction process for a long time. Even if these problems were solved, there was a difficulty in sterilizing harmful bacteria such as E. coli. In particular, coffee, unlike other foods, requires a strict sterilization treatment to reach the sterilization level, but it is difficult to preserve the unique taste and aroma of coffee when simply heat-treated at high temperatures. There was a problem in that it was difficult to sterilize the bacteria present in the solid content.

Therefore, there was an urgent need to develop a new sterilization system capable of sterilizing at a sterilization level while preserving the unique taste and aroma of coffee.

Korean Patent Publication No. 1614812 (2016.04.18)

Accordingly, the present invention has been proposed to solve the problems of the related art as described above, and an object of the present invention is to sterilize liquid coffee, which is difficult to sterilize due to solid content, at an almost sterilization level while preserving the unique taste and aroma of coffee. It is to provide a liquid coffee sterilization system suitable for

In order to achieve the above object, the liquid coffee sterilization system according to the technical idea of the present invention includes a first heat exchanger and a second heat exchanger through which liquid coffee transferred by pumping of a transfer pump passes, and the first heat exchanger In, the liquid coffee is rapidly heated and sterilized while passing through a high-temperature heating medium, and the liquid coffee sterilized in the first heat exchanger is rapidly cooled in the second heat exchanger while passing low-temperature cooling water, but the first heat exchanger and the second The heat exchanger is characterized in its technical configuration that the liquid coffee is sequentially disposed nearby so that it can be rapidly cooled immediately by minimizing the time delay in the heat-sterilized state.

Here, in each of the first heat exchanger and the second heat exchanger, a plurality of metal heat transfer plates are stacked for rapid heat exchange, and each of the two types of fluids is guided through the stacked heat transfer plates to induce heat exchange between the two types of fluids. It may be characterized in that it is provided as a plate heat exchanger having flow paths.

In addition, the motor of the transfer pump for transferring the liquid coffee may be characterized in that it is provided with an inverter motor capable of controlling the transfer speed of the liquid coffee.

In addition, in the first heat exchanger, a plurality of set temperatures at which the liquid coffee should be heated by the heating medium are provided, and the transfer speed of the liquid coffee is controlled by differentially controlling the motor of the transfer pump according to the set temperature of each liquid coffee, , It may be characterized in that the lower the set temperature, the lower the transfer speed of the liquid coffee is controlled, and the higher the set temperature is, the higher the transfer speed of the liquid coffee is controlled.

In addition, a first storage tank for receiving and storing the liquid coffee extracted from the coffee beans; a heating medium boiler for heating the heating medium and supplying it to the first heat exchanger; a first circulation pump for circulating a heating medium between the first heat exchanger and the heating medium boiler; a cooling device cooling the cooling water and supplying it to the second heat exchanger; a second circulation pump for circulating cooling water between the second heat exchanger and the cooling device; and a second storage tank for temporarily storing while maintaining the temperature of the liquid coffee cooled through the second heat exchanger, wherein the first heat exchanger, the second heat exchanger and the heat medium boiler having a relatively small size further include All are space-intensively installed in the first installation space, and the first storage tank, the second storage tank and the cooling device having a relatively large size may be installed outside the first installation space.

In addition, a cleaning line connecting a point of a second circulation line for circulating cooling water via the cooling device and the second heat exchanger and a point of an inlet transfer line of the first heat exchanger among the transfer lines is further provided. When the first heat exchanger and the second heat exchanger are contaminated due to liquid coffee, a part of the cooling water circulating along the second circulation line is drawn to the transfer line to wash the first heat exchanger and the second heat exchanger. It can be characterized as being able to.

In addition, a first bypass line connecting the inlet transfer line and the outlet transfer line of the first heat exchanger by bypassing the first heat exchanger, the inlet transfer line of the second heat exchanger bypassing the second heat exchanger and A second bypass line connecting the outlet transfer line, and a recovery line connecting a point of the inlet transfer line of the first storage tank from one point of the outlet transfer line of the transfer pump among the transfer lines Thus, if necessary, the liquid coffee leaked from the first storage tank may be selectively recovered to the first storage tank without going through the first heat exchanger and the second heat exchanger.

In addition, a return pump is further installed at one point of the first bypass line to pump liquid coffee from the outlet transfer line of the first heat exchanger to the inlet transfer line of the first heat exchanger and return it. If the temperature of the liquid coffee is measured immediately after it flows out of the heat exchanger and is less than the set temperature, it is considered that the liquid coffee has not been heated and sterilized to a sufficient level, and the return pump is operated to remove the liquid coffee from the first heat exchanger. It may be characterized in that it is pumped back from the side transfer line to the inlet transfer line of the first heat exchanger.

In addition, in the first heat exchanger, the liquid coffee is heated to a high temperature of 60 to 140° C. by the heating medium, and the liquid coffee is cooled to a low temperature of 8 to 20° C. by the cooling water in the second heat exchanger. can do.

In addition, an instantaneous heater is installed at one point of the transfer line on the outflow side of the first heat exchanger among the transfer lines so that the liquid coffee can be additionally heated by an electric heater, and the liquid immediately after flowing out from the first heat exchanger is installed. If the temperature of the coffee is less than the set temperature by measuring the temperature, it is considered that the liquid coffee has not been heated and sterilized to a sufficient level, and the instantaneous heater is operated to further heat the liquid coffee.

The liquid coffee sterilization system according to the present invention makes it possible to sterilize liquid coffee, which is difficult to sterilize due to solid content, to an almost sterilization level, while preserving the unique taste and aroma of coffee in the best state.

In addition, the present invention enables rapid cooling without a time delay after rapid heating by a configuration in which the first heat exchanger and the second heat exchanger provided as a plate heat exchanger are sequentially arranged nearby.

In addition, the present invention enables effective installation space operation by intensively installing the first heat exchanger and the second heat exchanger having a relatively small size in the same space while dispersing the components having a relatively large size to another place. This makes it possible to easily build the system even for small and medium-sized companies that cannot secure a large amount of indoor space.

1 is a configuration diagram of a liquid coffee sterilization system according to an embodiment of the present invention;
2 is a perspective view for explaining a plate heat exchanger provided as a first heat exchanger and a second heat exchanger in the liquid coffee sterilization system according to an embodiment of the present invention;
3 to 5 are operation diagrams for explaining various operating forms of the liquid coffee sterilization system according to an embodiment of the present invention;
6 is a configuration diagram for explaining a liquid coffee sterilization system according to a modified embodiment of the present invention;

A liquid coffee sterilization system according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements. In the accompanying drawings, the dimensions of the structures are enlarged than the actual for clarity of the present invention, or shown reduced than the actual in order to understand the schematic configuration.

Also, terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

<Example>

1 is a block diagram of a liquid coffee sterilization system according to an embodiment of the present invention, and FIG. 2 is a plate heat exchanger provided as a first heat exchanger and a second heat exchanger in the liquid coffee sterilization system according to an embodiment of the present invention. It is a perspective view for

As shown, the liquid coffee sterilization system according to an embodiment of the present invention includes a first heat exchanger 110a and a second heat exchanger 110b sequentially arranged nearby, a heating medium boiler 120, a cooling device ( 130), the first storage tank 140, the second storage tank 150, the instantaneous heater 160, the transfer pump (P1), the first circulation pump (P2), the second circulation pump (P3) and the supply pump (P4) ) is included.

The liquid coffee sterilization system according to the embodiment of the present invention is configured to preserve the original taste and aroma of coffee while sterilizing it at a sterilization level for liquid coffee that is difficult to sterilize due to the solid content by the above main components. do.

Hereinafter, a liquid coffee sterilization system according to an embodiment of the present invention will be described in detail focusing on each of the above components.

The first heat exchanger 110a serves to rapidly heat and sterilize the liquid coffee while passing through a high-temperature heating medium. The first heat exchanger 110a is provided as a plate heat exchanger for rapid heat exchange between the heating medium and the liquid coffee. As shown in FIG. 2, in the plate heat exchanger, a plurality of metal heat transfer plates 111 are stacked and each of the two types of fluids is guided through the stacked heat transfer plates 111 to induce heat exchange between the two types of fluids. It has a flow path and a second flow path. In FIG. 2 , the first flow path is formed from the first inlet 112a to the first outlet 112b, and the second flow path is formed from the second inlet 113a to the second outlet 113b. According to the configuration of such a plate heat exchanger, for example, a heating medium may flow through the first flow path and liquid coffee may flow through the second flow path. Such a plate heat exchanger is characterized by high heat exchange efficiency by allowing fluids to form a turbulent flow by the corrugated structure of the stacked heat transfer plates 111 . If such a plate type heat exchanger is provided with a heat transfer coefficient of 2500~600Kcal/m2hr℃, the heat exchange efficiency is 3~5 times higher than that of a shell-and-tube heat exchanger of the same class.

In the first heat exchanger (110a), the liquid coffee is preferably heated to a temperature of 60 to 140° C. by a heating medium, and more preferably, by heating the liquid coffee to a temperature of 130° C., even bacteria present in the solid content can be completely sterilized. make it possible At this time, the temperature of the heating medium passing through the first heat exchanger (110a) may be higher than the set temperature of the liquid coffee by about 30°C.

The second heat exchanger 110b serves to rapidly cool the liquid coffee sterilized at high temperature in the first heat exchanger 110a to a low temperature while passing the low-temperature cooling water as opposed to the first heat exchanger 110a. Like the first heat exchanger 110a, the second heat exchanger 110b is also provided as a plate heat exchanger shown in FIG. 2 for rapid heat exchange between cooling water and liquid coffee. When the plate heat exchanger is used as the second heat exchanger 110b, cooling water may flow through the first flow path and liquid coffee may flow through the second flow path. In the second heat exchanger (110b), the liquid coffee is preferably cooled to a temperature of 8 to 20° C. by low-temperature cooling water of −2° C., and more preferably cooled to a temperature of 10° C. According to the experiment of the present applicant, it was found that the best taste and flavor was obtained when liquid coffee was rapidly cooled to a temperature of 10°C without delay at high temperature.

Here, it should be noted that the first heat exchanger (110a) and the second heat exchanger (110b) are sequentially arranged adjacent to each other. As described above, according to the configuration in which the first heat exchanger 110a and the second heat exchanger 110b are sequentially arranged nearby, the second heat exchange is performed by minimizing the time delay in the state in which the liquid coffee is heat-sterilized in the first heat exchanger 110a. It becomes possible to rapidly cool immediately in the unit 110b. As such, the liquid coffee is rapidly heated in the first heat exchanger (110a) to be completely sterilized for a short time of 2 to 3 seconds at high temperature, and the heated liquid coffee is not left as it is, and a second heat exchanger (110b) disposed nearby. It is possible to preserve the unique taste and aroma of liquid coffee by making and maintaining it at a temperature of around 10℃ for a short time of only 5 seconds.

It can be confirmed from Table 1 attached below that the liquid coffee sterilization system according to an embodiment of the present invention having such a unique configuration is much more advantageous in preserving the original taste and aroma of liquid coffee than products that adhere to the conventional sterilization method. can

division Sterilization method Sterilization temperature (℃) Sterilization ability (%) Maintain taste/smell satisfaction Company A heating 130 100 lowness lowness Company B UV 60~80 98 lowness usually Example heating/cooling 10/130 100 High High

One more noteworthy point here is that the boiler and cooler that can directly heat and cool the liquid coffee are not continuously installed in order to cool the liquid coffee after heating it. Instead, in order to minimize the installation space, the first heat exchanger 110a and the second heat exchanger 110b provided as a plate heat exchanger were continuously arranged and installed. Accordingly, it is better to intensively install the first heat exchanger 110a and the second heat exchanger 110b having a relatively small size in the first installation space, which is the same space, while dispersing the components having a relatively large size to another place. Therefore, effective space management is achieved. In addition, since the first heat exchanger 110a and the second heat exchanger 110b operate in such a way that the two types of fluids exchange heat with each other, there is an advantage that the room temperature is not greatly affected.

The heating medium boiler 120 is installed to heat the heating medium circulated by the first circulation line L2 and supply it to the first heat exchanger 110a. The first circulation pump P2 plays a role of circulating the heating medium between the first heat exchanger 110a and the heating medium boiler 120 .

Here, since the heating medium boiler 120 uses a heating medium such as oil capable of heating liquid coffee to a higher temperature because the boiling point is higher than that of water, it has the advantage of being able to drastically reduce the size than a general steam boiler (steam of the same level). The volume can be reduced to almost 1/7th that of a boiler). Therefore, there is no difficulty in installing the heat medium boiler 120 together with the first heat exchanger 110a and the second heat exchanger 110b in the same installation space.

The cooling device 130 is installed to cool the cooling water circulated by the second circulation line L3 and supply it to the second heat exchanger 110b. The second circulation pump P3 plays a role of circulating cooling water between the second heat exchanger 110b and the cooling device 130 .

The first storage tank 140 is installed to receive and store the liquid coffee extracted from coffee beans, and the second storage tank 150 is the liquid coffee cooled through the second heat exchanger 110b. It is installed to serve as a temporary storage while maintaining a cooled temperature. The liquid coffee temporarily stored in the second storage tank 150 is pumped by the supply pump P4 installed on the outlet side of the second storage tank 150 and supplied to the production line where the product container and packaging are made.

Here, a first intake/exhaust valve 141 and a second intake/exhaust valve 151 for allowing intake and exhaust, respectively, are installed at the upper ends of the first storage tank 140 and the second storage tank 150, respectively, in the tank according to the transfer of liquid coffee. It enables the buffer function to absorb the pressure change and the resulting shock.

The instantaneous heater 160 is installed to additionally heat the liquid coffee by an electric heater at one point of the outflow side transfer line L1 of the first heat exchanger 110a among the transfer lines L1. Accordingly, if the temperature sensor installed on the outflow side transfer line L1 of the first heat exchanger 110a measures the outflow side temperature of the liquid coffee and is less than a predetermined temperature, for example, 120° C., the liquid coffee is heated to a sufficient level and Considering that it has not been sterilized, the instantaneous heater 160 is operated to further heat the liquid coffee instantaneously. For this purpose, it is preferable that the electric heater mounted on the instantaneous heater 160 is provided to instantly heat the liquid coffee to a temperature of 180° C. or higher.

The transfer pump (P1) is provided with a high-pressure pump capable of exerting sufficient force to smoothly transfer the liquid coffee having viscosity along the transfer line (L1). For example, it may be provided with a high-pressure pump of 25 kg/cm 2 G class. And the motor of the transfer pump (P1) is provided as an inverter motor. As such, when the motor of the transfer pump (P1) is provided as an inverter motor, a plurality of set temperatures of liquid coffee heated by a heating medium in the first heat exchanger (110a) are applied, and the transfer pump (P1) is differentiated according to each set temperature. It becomes possible to control the motor of the liquid coffee to control the transfer speed. At this time, as the set temperature is lower, the motor of the transfer pump (P1) is controlled in a direction to decrease the transfer speed of the liquid coffee, and the motor of the transfer pump (P1) is controlled in a direction to increase the transfer speed of the liquid coffee as the set temperature is higher. do. For example, when liquid coffee is heated by a heating medium and maintained at a temperature of 130°C, sufficient sterilization is achieved in 2-3 seconds, so that the transfer speed of liquid coffee can be increased, and at a temperature of 120°C, It takes time, 8-10 seconds at a temperature of 100°C, 12-15 seconds at a temperature of 85°C, and 30 seconds at a temperature of 60°C, so the transfer speed of liquid coffee can be gradually reduced. Here, the temperature measurement of the liquid coffee is preferably made with a time difference immediately after it flows out from the first heat exchanger (110a). To this end, temperature sensors are installed at the first point connected to the outlet of the first heat exchanger 110a of the transfer line L1 and the second point spaced apart from it along the flow direction of the liquid coffee, respectively, and the temperature is measured and monitored in real time. .

In the case of the above-mentioned main components, as mentioned above, the first heat exchanger 110a, the second heat exchanger 110b, and the heat medium boiler 120 having a relatively small size are space-intensive in the same space, the first installation space. The first storage tank 140 , the second storage tank 150 , and the cooling device 130 having relatively large sizes are suitable for dispersing and disposing outside the first installation space. This makes it possible to minimize the indoor installation space, making it possible to build a system suitable for small and medium-sized companies that do not have sufficient indoor space.

On the other hand, in the liquid coffee sterilization system according to the embodiment of the present invention, in addition to the above-described transfer line (L1), the first circulation line (L2), the second circulation line (L3), the cleaning line (L6), the first bypass line ( L4), a second bypass line (L5), and a recovery line (L7) are further installed.

The cleaning line L6 is installed to connect a point of the second circulation line L3 and a point of the inlet transfer line L1 of the first heat exchanger 110a among the transfer lines L1. Accordingly, when an urgent problem such as clogging of the flow paths of the first heat exchanger 110a and the second heat exchanger 110b occurs due to the solid content of the liquid coffee during system operation, the liquid coffee It is possible to wash the first heat exchanger 110a and the second heat exchanger 110b by drawing a portion of the coolant circulating along the second circulation line L3 to the transfer line L1 in a state in which the transfer is temporarily stopped. . At this time, only the transfer pump (P1) and the second circulation pump (P3) are operated while all other pumps are stopped, and the second heat exchanger instead of opening the valves respectively installed in the cleaning line (L6) and the cooling water discharge line The valve installed in the inlet side second circulation line (L3) of the 110b and the inlet transfer line (L1) of the second storage tank 150, and the valve installed in the circulation line are closed.

On the other hand, when formally washing the entire transfer line (L1) through which liquid coffee flows, only the transfer pump (P1) is operated in a state in which all other pumps are stopped, as shown in FIG. Instead of coffee, the cleaning liquid is injected and transferred, but the cleaning effect is enhanced by transferring the liquid coffee at a slower speed than when transferring the liquid coffee.

The first bypass line (L4) bypasses the first heat exchanger (110a) and is installed to connect the inlet transfer line (L1) and the outlet transfer line (L1) of the first heat exchanger (110a), and The second bypass line L5 is installed to bypass the second heat exchanger 110b and connect the inlet transfer line L1 and the outlet transfer line L1 of the second heat exchanger 110b. And the recovery line (L7) is a point of the inlet transfer line (L1) of the first storage tank 140 from a point of the outlet transfer line (L1) of the transfer pump (P1) of the transfer line (L1) installed to connect Accordingly, as shown in FIG. 5, when an unexpected accident such as a sudden malfunction of the heating medium boiler 120 or the cooling device 130 occurs and the transfer of liquid coffee has to be stopped, the liquid coffee leaked from the first storage tank 140 It becomes possible to recover to the first storage tank 140 as it is without going through the first heat exchanger 110a and the second heat exchanger 110b. At this time, only the transfer pump P1 is operated in a state where all other pumps are stopped, and instead of opening the valves installed in the first bypass line L4 and the second bypass line L5, the first heat exchanger 110a A valve installed in the inlet transfer line L1 of the second heat exchanger 110b and the inlet transfer line L1 of the second heat exchanger 110b, a valve installed in the inlet transfer line L1 of the second storage tank 150, and a coolant discharge line The valve installed on the

On the other hand, at one point of the first bypass line (L1), as shown in FIG. 6, liquid coffee is introduced from the outlet side transfer line (L1) of the first heat exchanger (110a) to the first heat exchanger (L1). It is preferable that a return pump (P5) for pumping back to the side transfer line is further installed. For reference, although the return pump P5 and the instantaneous heater 160 are shown to be installed together in the drawings, only one of them may be installed. According to this configuration, by measuring the temperature of the liquid coffee at the outlet side of the first heat exchanger 110a, if the liquid coffee is less than a set predetermined temperature, it is considered that the liquid coffee has not been heated and sterilized to a sufficient level, and is shown in FIG. Operate the return pump (P5) as described above. Then, the liquid coffee can be pumped back from the outlet transfer line L1 of the first heat exchanger 110a to the inlet transfer line L1 of the first heat exchanger 110a. Accordingly, sufficient sterilization can be achieved by passing the liquid coffee through the first heat exchanger 110a once again. However, when the return pump (P5) is operated, the other sections of the transfer line (L1) use a valve so that the liquid coffee to be reheated can circulate only between the first bypass line (L4) and the first heat exchanger (110a). Temporarily shut off the euro.

Although preferred embodiments of the present invention have been described above, various changes, modifications and equivalents may be used in the present invention. It is clear that the present invention can be equally applied by appropriately modifying the above embodiments. Accordingly, the above description is not intended to limit the scope of the present invention, which is defined by the limits of the following claims.

110a: first heat exchanger 110b: second heat exchanger
120: heating medium boiler 130: cooling device
140: first storage tank 150: second storage tank
160: instantaneous heater P1: transfer pump
P2: first circulation pump P3: second circulation pump
P4: supply pump P5: return pump

Claims (10)

A first heat exchanger and a second heat exchanger through which the liquid coffee transferred along the transfer line passes by the pumping of the transfer pump is provided,
In the first heat exchanger, liquid coffee is rapidly heated and sterilized while passing through a high-temperature heating medium, and in the second heat exchanger, the liquid coffee sterilized in the first heat exchanger is rapidly cooled while passing through low-temperature cooling water, The first heat exchanger and the second heat exchanger are sequentially arranged adjacent to each other so that the liquid coffee can be cooled quickly by minimizing the time delay in the heat-sterilized state,
In each of the first heat exchanger and the second heat exchanger, a plurality of metal heat transfer plates are stacked for rapid heat exchange and pass through the stacked heat transfer plates while guiding each of the two types of fluids to induce heat exchange between the two types of fluids. It is provided with an equipped plate heat exchanger,
The motor of the transfer pump that transfers liquid coffee is provided with an inverter motor that can control the transfer speed of liquid coffee,
a first storage tank for receiving and storing liquid coffee extracted from coffee beans; a heating medium boiler for heating the heating medium and supplying it to the first heat exchanger; a first circulation pump for circulating a heating medium between the first heat exchanger and the heating medium boiler; a cooling device cooling the cooling water and supplying it to the second heat exchanger; a second circulation pump for circulating cooling water between the second heat exchanger and the cooling device; and a second storage tank for temporarily storing while maintaining the temperature of the liquid coffee cooled through the second heat exchanger, wherein the first heat exchanger, the second heat exchanger and the heat medium boiler having a relatively small size All are space-intensively installed in the first installation space, and the first storage tank, the second storage tank and the cooling device having a relatively large size are installed outside the first installation space,
A first bypass line connecting the inlet transfer line and the outlet transfer line of the first heat exchanger by bypassing the first heat exchanger, the inlet transfer line and the outlet side of the second heat exchanger bypassing the second heat exchanger A second bypass line connecting the transfer line and a recovery line connecting a point of the transfer line on the inlet side of the first storage tank from a point of the transfer line on the outflow side of the transfer pump among the transfer lines are further provided. In this case, the liquid coffee sterilization system, characterized in that the liquid coffee leaked from the first storage tank can be selectively recovered to the first storage tank without going through the first heat exchanger and the second heat exchanger. delete delete The method of claim 1,
In the first heat exchanger, a plurality of set temperatures to which liquid coffee should be heated by a heating medium are provided, and the transfer speed of liquid coffee is controlled by differentially controlling the motor of the transfer pump according to each liquid coffee set temperature, and setting Liquid coffee sterilization system, characterized in that the lower the temperature, the lower the transfer speed of the liquid coffee, and the higher the set temperature, the higher the transfer speed of the liquid coffee is controlled. delete The method of claim 1,
a cleaning line connecting a point of a second circulation line for circulating cooling water via the cooling device and the second heat exchanger to a point of a transfer line on the inlet side of the first heat exchanger among the transfer lines;
When the first heat exchanger and the second heat exchanger are contaminated due to liquid coffee, a part of the cooling water circulating along the second circulation line is drawn to the transfer line so that it can be used for washing the first heat exchanger and the second heat exchanger. Liquid coffee sterilization system, characterized in that. delete The method of claim 1,
A return pump is further installed at one point of the first bypass line to pump and return liquid coffee from the outlet transfer line of the first heat exchanger to the inlet transfer line of the first heat exchanger,
If the temperature of the liquid coffee is measured immediately after it flows out of the first heat exchanger and is less than the set temperature, it is considered that the liquid coffee has not been heated and sterilized to a sufficient level, and the return pump is operated to convert the liquid coffee to the first heat exchange. Liquid coffee sterilization system, characterized in that it is pumped back from the outlet transfer line of the unit to the inlet transfer line of the first heat exchanger. The method of claim 1,
Liquid coffee is heated to a high temperature of 60 to 140° C. by a heating medium in the first heat exchanger, and the liquid coffee is cooled to a low temperature of 8 to 20° C. by cooling water in the second heat exchanger. Coffee sterilization system. 10. The method of claim 9,
An instantaneous heater is installed at one point of the transfer line on the outflow side of the first heat exchanger among the transfer lines so that the liquid coffee can be additionally heated by an electric heater,
If the temperature of the liquid coffee immediately after flowing out of the first heat exchanger is less than the set temperature, it is considered that the liquid coffee has not been heated and sterilized to a sufficient level to operate the instantaneous heater to further heat the liquid coffee. Liquid coffee sterilization system.

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