KR102004953B1 - Device for roasting grains and method for roasting grains - Google Patents

Abstract

The present invention relates to a grain roasting device which prevents carbide generated by incomplete combustion in roasted grains when organic grains (sesame, beans, coffee beans, etc.) are roasted and, more specifically, to a grain roasting device which comprises: a nitrogen generating unit for generating and flowing out high-purity nitrogen gas separated from outside air by inflowing the outside air; and a roasting unit for roasting grains with high temperature nitrogen gas heated by introducing the high-purity nitrogen gas generated in the nitrogen generating unit.

Description

Grain roasting device and grain roasting method {DEVICE FOR ROASTING GRAINS AND METHOD FOR ROASTING GRAINS}

The present invention relates to a grain roasting apparatus for roasting grains such as green beans, sesame seeds, etc. of coffee, and more particularly, to a grain roasting apparatus for preventing carbides from being produced due to incomplete combustion in roasted grains when organic grains are roasted. will be.

Some of the various grains, such as coffee beans, sesame seeds, beans, etc., are provided to consumers through roasting (roasting or roasting).

Hereinafter, for convenience of description, an example of grains will be described as coffee beans.

In order to get a good coffee taste, the coffee beans should be roasted properly. Usually, the coffee beans are roasted within 30 minutes in the range of 150-280 ° C.

In the process of processing coffee beans, the coffee beans are roasted (roasted, roasted) first, then blended with additives such as flavorings, and then grinded to produce coffee beans for distribution. When used, it will be coffee tea down to steam of boiling water.

Roasting, or roasting, is the first process of roasting coffee beans from light chocolate to dark black. In addition, the roasting is made by the process of the roasted beans to remove the moisture contained in the green beans, and after the water is removed, depending on the degree of roasting from light to strong roasting.

Green beans give off flavors such as sour, bitter, and sweet flavors by heating, but green beans themselves do not show any characteristic of coffee before they are roasted.

Therefore, this roasting process is a coffee processing operation that heats the green coffee beans to cause chemical changes to newly create the flavor and aroma, and makes the best use of the characteristics of the coffee beans to improve the taste and aroma. It is the most important process in the processing of coffee.

In the roasting, conventional roasting methods include hot air, semi-hot air, and direct fire.

The hot air type is a method of distributing green beans by blowing air to the rotating drum containing green beans, which is equipped with a combustion chamber and controlling temperature. The semi hot air type contains green beans through an induction pipe so that the fire does not directly touch the green beans. A part of the rotating drum sucks the hot air made of air, and the direct type puts the green beans into the rotating drum in the form of a mesh and distributes them by directly touching the fire of the combustion device under the rotating drum.

Thus, when roasting with oxygen-containing air, as in the prior art, carbide shells such as soot are generated while the shell of the green beans or a part of the outer shell of the green beans are incompletely burned or burned by a high temperature atmosphere and oxygen. Alternatively, carbides from combustion may interfere with the roasting flavor of the coffee beans.

In other words, according to the prior art, due to incomplete combustion of green beans / silver skin or carbides due to combustion, it causes mischief such as coal, etc., and the carbon of the carbide is stronger than the sour, bitter and sweet inherent in coffee, It is a factor that impairs the taste, aroma, and flavor. It is a factor that inhibits the quality of coffee beans.

In addition, the carbide produced by the incomplete combustion or combustion is also likely to contain carcinogens, etc. There is also a problem that may damage the health of roasted grain users such as coffee beans.

In addition, since the roasting process is performed in the air or oxygen atmosphere in the prior art, there is a problem that a combustion gas (or incomplete combustion gas) must be generated and a separate combustion gas purification facility must be provided in the communication of the roasting device. .

Accordingly, it is an object of the present invention to provide a grain roasting apparatus that solves the problems of the prior art.

Specifically, it is an object of the present invention to provide a grain roasting apparatus that prevents the generation of carbides due to incomplete combustion in the roasted grains when the organic grains are roasted.

According to one embodiment of the present invention for solving the above problems, the present invention, a grain roasting apparatus, nitrogen generation unit for generating and flowing out high-purity nitrogen gas separated from the outside air by inflowing outside air; It is possible to provide a grain roasting apparatus comprising a; roasting unit for roasting grains by heating the high-temperature nitrogen gas introduced by the high-purity nitrogen gas generated in the nitrogen generating unit.

Also, preferably, the roasting unit includes a roasting chamber in which grains to be roasted are accommodated; A housing part surrounding the roasting chamber and defining a flow path of the hot nitrogen gas, the housing part including an inlet of the high purity nitrogen gas and an outlet of the hot nitrogen gas; And a warm air heating unit provided upstream of the roasting chamber in the flow path of the nitrogen gas in the housing part and configured to heat the high purity nitrogen gas.

Also preferably, the roasting chamber is configured to be rotatable.

In addition, preferably, the nitrogen generating unit, a membrane module including a gas separation membrane for separating and generating high-purity nitrogen by separating nitrogen from the outside air at a partial pressure; And a pretreatment unit for pre-processing the external air to flow into the membrane module to generate partial pressure and to protect the membrane module.

Also, preferably, the pretreatment unit comprises: a compressor for compressing the external air and supplying the compressed air to the membrane module; An external air filter unit for filtering fine dust and foreign particles contained in the external air in front of the compressor; And a condensate removal unit for removing condensate contained in the compressed air in the compressor.

In addition, preferably, the condensate removing unit is composed of a centrifugal filter, and between the compressor and the condensate removing unit, air which continuously stores the compressed air generated by the compressor at a predetermined pressure to continuously discharge the compressed air. And a flow rate control valve configured to adjust a flow rate of the compressed air continuously flowing out of the tank and the air tank and supplied to the condensate removal unit.

The pretreatment unit may further include a front temperature control unit configured to cool the air compressed by the compressor at a rear end of the pretreatment unit to a predetermined temperature and supply the cooled air to the membrane module. .

In addition, the nitrogen generating unit, the after-treatment unit for processing so that impurities do not flow into the roasting unit before the high-purity nitrogen flowing out of the membrane module to the roasting unit; further comprises a; .

In addition, preferably, the after-treatment unit includes a particle removal unit for removing particles contained in the high purity nitrogen gas generated in the membrane module, and the particle removal unit filters the particles contained in the high purity nitrogen gas. Particle filter unit; characterized in that it comprises a.

Also, preferably, the particle removal unit may further include a combustion unit configured to combust and vaporize particles contained in the high purity nitrogen gas by burning the high purity nitrogen gas in which the particles are first filtered in the particle filter unit. It features.

Also, preferably, the aftertreatment unit may further include a rear temperature control unit configured to preheat the high purity nitrogen gas before the high purity nitrogen gas flows into the warm air heating unit of the roasting unit from the rear of the aftertreatment unit. Characterized in that.

Preferably, the nitrogen generating unit, the front temperature control unit for supplying the cooled air to the membrane module by cooling the air compressed by the compressor at the rear of the pre-treatment unit by a predetermined temperature; A rear temperature control unit for preheating the high purity nitrogen gas before the high purity nitrogen gas flows into the warm air heating unit of the roasting unit at the rear of the membrane module or at the rear of the nitrogen generating unit; And a thermoelectric element configured to be in surface contact with the front temperature control part on one surface and to be in surface contact with the rear temperature control part on the other surface.

And, according to another embodiment of the present invention for solving the above problems, the present invention, as a roasting method of grains for roasting grains, after introducing the outside air, the high purity in the outside air to the nitrogen generating unit A nitrogen gas generating step of generating nitrogen and flowing the high purity nitrogen gas out of the nitrogen generating unit; It is possible to provide a method for roasting grains, including; a step of heating the high purity nitrogen gas generated by introducing the high purity nitrogen gas generated in the nitrogen gas generation step and heating the high purity nitrogen gas, and roasting the grains with the high temperature high purity nitrogen gas. .

According to the above-mentioned problem solving means, unlike the conventional roasting apparatus using the air containing oxygen, the present invention is produced through the nitrogen generating unit by roasting grains with heated hot nitrogen gas, the present invention is essential for combustion Oxygen is removed from inside the roasting apparatus in a high temperature atmosphere of three elements combustible material, oxygen and ignition point, thereby preventing incomplete combustion or burning of the shell or the shell of green beans, so that carbides, such as soot It will not be created.

As a result, the present invention can prevent the roasting flavor deterioration of the coffee beans due to the incomplete combustion or the carbides due to the combustion, and minimize or eliminate the unpleasant aromas and flavors such as the carbon aroma, charcoal taste of the carbide, thereby improving the quality of the coffee beans Can be significantly improved.

In addition, the present invention does not generate any carbide produced due to incomplete combustion, it is possible to provide a healthy coffee beans without human harmful substances such as carcinogens.

In addition, the present invention has the advantage that the incomplete combustion or combustion process does not occur in the roasting unit, and because only nitrogen gas is discharged from the roasting unit, it is not necessary to provide a separate combustion gas purification facility in the communication of the roasting device.

1 is a schematic diagram of a grain roasting apparatus according to an embodiment of the present invention,
2 is a schematic cross-sectional view of a roasting unit according to an embodiment of the present invention;
3 is a schematic block diagram of a grain roasting apparatus according to an embodiment of the present invention,
Figure 4 is a schematic diagram of a nitrogen generating unit according to an embodiment of the present invention,
5 is a schematic diagram of a pretreatment unit of a nitrogen generating unit according to an embodiment of the present invention,
Figure 6 is a schematic diagram of the after-treatment unit of the nitrogen generating unit according to an embodiment of the present invention,
7 is a schematic view of the front temperature control and the rear temperature control according to a further embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and are common in the art to which the present invention belongs. It is provided to fully inform those skilled in the art of the scope of the invention, which is to be defined only by the scope of the claims.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of components other than the mentioned components.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art.

Hereinafter, with reference to the accompanying drawings will be described for the present invention.

1 is a schematic diagram of a grain roasting apparatus 1000 according to an embodiment of the present invention, Figure 2 is a schematic cross-sectional view of a roasting unit 200 according to an embodiment of the present invention, Figure 3 is a present invention Figure 4 is a schematic block diagram of a grain roasting apparatus 1000 according to an embodiment of the present invention, Figure 4 is a schematic diagram of a nitrogen generating unit 100 according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention A schematic diagram of the pretreatment unit 110 of the nitrogen generating unit 100 according to the example, Figure 6 is a schematic diagram of the post-treatment unit 130 of the nitrogen generating unit 100 according to an embodiment of the present invention.

1 to 6, the grain roasting apparatus 1000 according to an embodiment of the present invention, the nitrogen generating unit 100 for generating high-purity nitrogen gas separated by separating nitrogen from the outside air, and It includes a roasting unit 200 for receiving the high purity nitrogen gas from the nitrogen generating unit 100 and put into the roasting process of grain.

Here, the roasting unit 200 may include a hot air roasting machine and a semi hot air roasting machine.

The roasting unit 200 is configured to inject and heat the high purity nitrogen gas generated in the nitrogen generating unit 100, and then roast the grain with the heated hot nitrogen gas.

Specifically, as shown in FIGS. 1 to 3, the roasting unit 200 includes a roasting chamber 210, a housing part 220, a base part 230, and a warm air heating part 240. And a grains input unit 250, a discharge communication tube 260, and a blowing fan 270.

The roasting chamber 210 (ie, the roasting drum) is configured to receive grains (eg, coffee beans, etc.) to be roasted, and is a space where roasting occurs by heating the grains.

Preferably, the roasting chamber 210 may be rotatably mounted to the housing part 220.

Due to this, since the grains go through a roasting process in the rotating roasting chamber 210, the roasting is continued while each position of the grains in the roasting chamber 210 continues to move from the inside to the outside to the inside of the grains. So that a uniform roasting process can be carried out throughout the grain.

In addition, although not shown in the drawing, the roasting chamber 210 may be disposed to be inclined at a predetermined angle with respect to the housing part 220 such that the nitrogen gas inlet part is located at a lower position than the nitrogen gas outlet part based on the flow direction of the high purity nitrogen gas. Can be.

The roasting chamber 210 includes a rotating shaft 211 configured to rotate together through a center as shown in FIG. 2.

The rotating shaft 211 is rotated by a driving means and a power transmission means to be described later, so that the roasting chamber 210 can rotate.

In addition, the grain input unit 250 is connected to one side of the roasting chamber 210.

Preferably, the grain input unit 250 may be configured as a hopper.

The housing part 220 is configured to surround the roasting chamber 210 and define a flow path of the hot nitrogen gas.

In addition, the housing part 220 includes an inlet 221 of the high purity nitrogen gas located below and an outlet 222 of the high temperature nitrogen gas located above, between the inlet 221 and the outlet 222. In the receiving chamber formed to accommodate the roasting chamber 210 and the flow path of the high temperature high purity nitrogen gas.

The inlet 221 is fluidly connected to the lower passage 232 of the base portion 230 to be described later, the outlet 222 is fluidly connected to the discharge communication 260 to be described later.

The heating unit for warm air is provided upstream of the roasting chamber 210 in the flow path of the nitrogen gas inside the housing part 220.

For example, as shown in FIG. 2, the warm air heater 240 is provided under the housing 220, and the warm air heater 240 is configured to heat the high purity nitrogen gas. It can be configured as.

At this time, the lower portion of the housing portion 220, it is preferable to have a flow path for the high-purity nitrogen gas introduced through the inlet 221 passes through the heating unit 240 for hot air to flow to the roasting drum.

A base portion 230 supporting the housing portion 220 is provided below the housing portion 220.

Inside the base part 230, a lower flow path 232 is formed to be fluidly connected to the inlet of the housing part 220.

In addition, a connection part 231 is provided upstream of the lower flow path 232, and the connection part 231 is detachably attached to an end of the connection pipe 104 supplied with high purity nitrogen from the nitrogen generating unit 100 to be described later. Configured to be combined.

In an alternative embodiment, the housing part 220 has the inlet 221 of the housing part 220 directly removed from the end of the connecting pipe 104 without the base part 230 and the lower flow path 232. It may be configured as possible.

At least one or more of the base portion 230, the housing portion 220, and the discharge communicating portion 260 is provided with a blowing fan 270, and the blowing fan 270 has a high purity nitrogen gas in the housing portion ( Forced flow from the inlet 221 of the 220 to the outlet of the discharge communication portion 260.

A driving motor 281 is provided in the housing 220 or the base 230.

The drive shaft of the drive motor 281 is provided with a drive pulley, the rotating shaft 211 of the roasting chamber 210 is provided with a driven pulley, the drive pulley and the driven pulley to be power transfer by the belt (283). Connected.

As a further embodiment, the drive shaft of the drive motor 281 is provided with a drive sprocket instead of a drive pulley, the rotary shaft 211 of the roasting chamber 210 is provided with a driven sprocket, the drive sprocket and the driven The sprocket may be connected to the power transmission by the chain instead of the belt (283).

As shown in FIGS. 1 and 3 to 6, the nitrogen generating unit 100 generates high-purity nitrogen gas separated from the external air by introducing external air, and then generates the high-purity nitrogen gas from the roasting unit. And to flow to 200.

First, as shown in FIG. 1, the nitrogen generating unit 100 includes a casing 101, an opening / closing door 102 provided to be opened and closed on one surface of the casing 101, and the casing 101. Is formed on one side to move the external air inlet 103 and the external air inlet to the nitrogen generating unit 100, the high-purity nitrogen gas generated from the nitrogen generating unit 100 to the roasting unit 200 Connector 104.

3, the nitrogen generating unit 100 includes a pretreatment unit 110, a membrane module 120, and a post-treatment unit 130 in order of flow. The high-purity nitrogen gas post-processed at 130 is supplied to the warm air heater 240 through the connecting pipe 104 and the lower flow path 232 as shown in FIGS. 1 to 3.

Here, the membrane module 120 comprises a plurality of gas separation membrane or hollow fiber membrane, by separating the nitrogen from the outside air by using the difference in the permeation rate of the gas passing through the gas separation membrane by partial pressure to generate high purity nitrogen, Configured to spill out.

4 and 5, upstream or front of the membrane module 120, a pretreatment unit 110 is included.

The pretreatment unit 110 causes partial pressure to occur in the membrane module 120, and controls the state of the external air to protect the membrane module 120 (that is, the membrane module 120 is damaged due to external air). To prevent the external air from flowing into the membrane module 120.

Specifically, as shown in FIG. 5, the pretreatment unit 110 may include an external air filter unit 111, a compressor 112, a backflow prevention unit 113, an air tank 114, and a flow rate. At least one of the control valve 115, the condensate removal unit 116, and the front temperature control unit 117 may be included.

The external air filter 111 may be configured to adsorb and / or filter fine dust, foreign matter (external foreign matter particles), and the like contained in the external air, and may be detachably provided at the external air inlet 103. .

Preferably, the external air filter 111 may include an activated carbon filter.

In this way, by providing the external air filter 111, a portion of the purified air flowing into the compressor 112 can be introduced, it is possible to maintain the clean state of the compressor 112, thereby increasing the life of the compressor 112 You can.

The external air filtered by the external air filter 111 is introduced into the compressor 112.

The compressor 112 compresses the external air to generate partial pressure, and supplies the compressed external air to the membrane module 120.

Preferably, the compressor 112 may be configured as an oilless air compressor. As a result, the fine oil may be prevented from flowing into the membrane module 120, so that the separation performance of the gas separation membrane or the hollow fiber membrane may be reduced by the fine oil. As a result, it is also possible to prevent the fine oil contained in the high purity nitrogen gas separated from the membrane module 120.

The backflow prevention unit 113 is configured to prevent the outside air compressed by the compressor 112 from flowing back in an upstream or forward direction, and preferably, may be a check valve.

The condensate removal unit 116 is configured to remove condensate contained in the air compressed by the compressor 112.

As a result, the air from which the water is removed or the water content is minimized may be supplied to the membrane module 120, thereby improving gas separation efficiency of the membrane module 120.

Preferably, the condensate removal unit 116 may be configured as a centrifugal filter. For this reason, condensate removal efficiency or water removal efficiency can be improved.

In this case, an air tank 114 and a flow control valve 115 may be provided between the compressor 112 and the condensate removal unit 116.

The air tank 114 is configured to continuously store the compressed air generated by the compressor 112 at a predetermined pressure to continuously discharge the compressed air.

In addition, the flow control valve 115 is configured to continuously adjust the flow rate of the compressed air that is continuously discharged from the air tank 114 to the condensate removal unit 116.

This is because the centrifugal filter has high water removal efficiency, but this high water removal efficiency ensures high performance only when air is continuously supplied to the centrifugal filter, so that the air tank 114, the flow rate as in the present invention Due to the induction flow structure of the control valve 115 and the centrifugal filter, the water removal efficiency of the centrifugal filter can be maintained with high efficiency.

Downstream of the condensate removal unit 116, a front temperature control unit 117 is provided, the downstream portion of the front temperature control unit 117 is fluidly connected to the membrane module 120.

The front temperature control unit 117 is configured to cool the air compressed by the compressor 112 at the rear of the pretreatment unit 110 by a predetermined temperature to supply the cooled air to the membrane module 120.

That is, the front temperature controller 117 is configured to lower the temperature of the compressed outside air in a predetermined range before the compressed outside air is supplied to the membrane module 120.

This is because the external air from which water or condensed water has been removed is compressed by the compressor 112, and thus the external air in the compressed state may have a high temperature, so that the compressed external air in the elevated temperature state of the membrane module 120 is intact. When introduced into the membrane module 120, the gas separation membrane or the hollow fiber membrane (composed of a polymer is vulnerable to heat) may be damaged, the present invention is such a concern through the front temperature control unit 117 Can be removed beforehand.

As shown in Figure 3 and 6, downstream or rear of the membrane module 120, the post-processing unit 130 is provided, downstream or rear of the post-processing unit 130, the connecting tube 104 and / Or the warm air heating unit 240 of the roasting unit 200 is fluidly connected.

The aftertreatment unit 130 is configured to posttreatment such that impurities do not flow into the roasting unit 200 before the high purity nitrogen gas flowing out of the membrane module 120 is introduced into the roasting unit 200.

In detail, the aftertreatment unit 130 includes a particle removing unit 131, a three-way valve 132, a storage tank 133, a flow control valve 134, and a rear temperature control unit 135. do.

The aftertreatment unit 130 is configured to remove particles (eg, white powder, etc.) generated in the separation and / or generation of high purity nitrogen gas in the membrane module 120.

The particle removing unit 131 includes a particle filter unit 131a for filtering particles contained in the high purity nitrogen gas, and a combustion unit 131b.

The combustion unit 131b is configured to combust high-purity nitrogen gas from which particles are primarily filtered in the particle filter unit 131a, and to secondly burn and vaporize particles contained in the high-purity nitrogen gas.

In this way, the particle removal unit 131 is a primary filter, it is possible to completely remove the particles by the secondary combustion, so that particles such as white powder and the like in the roasting unit and / or food grains to prevent flowing, clean the roasting You can make it possible to proceed from the state.

Downstream or rearward of the particle removal unit 131, a three-way valve 132 may be provided.

High-purity nitrogen gas from which particles are removed from the particle removing unit 131 flows into the three-way valve 132, and the high-purity nitrogen gas introduced into the three-way valve 132 is downstream of the three-way valve 132. It is configured to selectively flow to one of the storage tank 133 and the rear temperature control unit 135 provided.

A downstream flow control valve is provided downstream of the storage tank 133, and a rear temperature control unit 135 is connected downstream of the flow control valve.

That is, the three-way valve 132 allows the high purity nitrogen gas to be directly supplied directly to the rear temperature control unit 135, or optionally the high purity nitrogen gas bypasses the storage tank 133 and the flow control valve 134. It is configured to regulate the flow so as to be supplied to the rear temperature control unit.

The storage tank 133 temporarily stores the high purity nitrogen gas at a predetermined pressure so that the high purity nitrogen gas can be continuously supplied to the roasting unit 200.

In addition, the flow control valve 134 is configured to adjust the flow rate of the high purity nitrogen gas is continuously discharged from the storage tank 133 is supplied to the roasting unit 200.

The rear temperature controller 135 preheats the high purity nitrogen gas before the high purity nitrogen gas flows into the warm air heater 240 of the roasting unit 200 at the rear of the aftertreatment unit 130. It is composed.

This is because the roasting temperature in the roasting chamber 210 is a high temperature of 150 ℃ ~ 280 ℃ or more, if a low temperature nitrogen gas is supplied to the high temperature roasting chamber 210 or the hot air heating unit 240 in terms of thermal efficiency or roasting efficiency Inevitably have a negative effect on the side, by preheating the high-purity nitrogen gas immediately before the nitrogen generating unit 100 is supplied to the roasting unit 200 in advance of the thermal efficiency side of the heating unit 240 for hot air or the roasting unit 200 It is possible to minimize or prevent the roasting efficiency from being lowered due to the introduction of new high purity nitrogen gas.

Preferably, the connection pipe 104 connecting the nitrogen generating unit 100 and the roasting unit 200 and / or the lower flow path 232 of the roasting unit 200 has a structure having a heat insulating layer on the outside. Can have.

This is to prevent the high purity nitrogen gas preheated by the rear temperature control unit 135 from being cooled by the ambient temperature.

More preferably, the connection pipe 104 connecting the nitrogen generating unit 100 and the roasting unit 200 and / or the lower passage 232 of the roasting unit 200 has a double structure having an air insulation layer. It may consist of a silicone hose.

7 is a schematic diagram of the front temperature control unit 117 and the rear temperature control unit 135 according to a further embodiment of the present invention.

According to a further embodiment of the present invention, the grain roasting apparatus 1000 further includes a thermoelectric element 300.

In detail, as shown in FIG. 7, the thermoelectric element 300 receives power through a power cable 311 to extract heat from an object contacting the thermoelectric element 300 or the thermoelectric element 300. And to supply heat to the object in contact with 300.

In particular, according to the present embodiment, the thermoelectric element 300 is in surface contact with the front temperature control part 117 on one surface, and is in surface contact with the rear temperature control part 135 on the other surface.

Here, the one surface is the heat absorbing surface to take heat from the front temperature control unit 117 toward the thermoelectric element 300, the other surface is the rear side of the thermoelectric element 300 from the heat taken from the front temperature control unit 117 It is a heat generating surface supplied to the temperature control unit 135.

Preferably, the one surface and the front temperature control unit 117, and the other surface and the rear temperature control unit 135 may be combined with a thermally conductive adhesive, respectively.

Thus, by using one thermoelectric element 300 can implement both the cooling function of the front temperature control unit 117 and the preheating function of the rear temperature control unit 135, thereby improving the energy efficiency of the grain roasting apparatus 1000. In order to reduce the number of parts, the overall manufacturing cost can be reduced, and at the same time, the grain roasting apparatus 1000 can be manufactured in a compact structure.

According to the above, the present invention by roasting grains with hot nitrogen gas heated after being produced through the nitrogen generating unit, the present invention is combustible material, oxygen and oxygen in a high temperature atmosphere above the ignition point roasting apparatus is an essential three elements of combustion Since it is removed internally (ie, the roasting process is carried out in an oxygen-free atmosphere), it is possible to prevent incomplete combustion or burning of the shell of the green beans or the shell of the green beans, so that carbides such as soot are not generated in the beans.

As a result, the present invention can minimize the unpleasant sour or bitter taste, such as roasting deterioration of the coffee beans due to carbides due to incomplete combustion and burnt taste, it is possible to significantly improve the quality of the coffee beans.

In addition, the present invention does not generate any carbide produced due to incomplete combustion, it is possible to provide a healthy coffee beans without human harmful substances such as carcinogens.

In addition, the present invention has the advantage that the incomplete combustion or combustion process does not occur in the roasting unit, and because only nitrogen gas is discharged from the roasting unit, it is not necessary to provide a separate combustion gas purification facility in the communication of the roasting device.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but it is only for the purpose of describing the present invention, and those skilled in the art to which the present invention pertains various modifications or equivalents from the detailed description of the invention. It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

1000: Grain Roasting Equipment
100: nitrogen generating unit
101: casing
102: opening and closing door
103: outside air inlet
104: connector
110: preprocessing unit
111: outside air filter
112: compressor
113: backflow prevention unit
114: air tank
115: flow control valve
116: condensate removal unit
117: front temperature control unit
120: membrane module
130: post-processing unit
131: particle removal unit
131a: Particle filter unit
131b: combustion section
132: three way valve
133: storage tank
134: flow control valve
135: rear temperature controller
200: roasting unit
210: roasting chamber (drum)
211: rotation axis
220: housing part
221: inlet
222 outlet
230: base portion
231 connection
232: lower flow path
240: heating unit for warm air
250: grain input unit
260: discharge communication
270 blower fan
281: drive motor
282: Drive Pulley
283: Belt
284: driven pulley
300: thermoelectric element
311: power cable

Claims (12)

As a grain roasting device,
A nitrogen generating unit which introduces outside air to generate and discharge high purity nitrogen gas separated from the outside air;
It includes; Roasting unit for roasting grains by heating the high-temperature nitrogen gas flowing in the high-purity nitrogen gas generated in the nitrogen generating unit
The roasting unit,
And a warm air heating unit configured to heat the high purity nitrogen gas.
The nitrogen generating unit,
A membrane module including a gas separation membrane that separates nitrogen from external air at a partial pressure to generate and discharge high purity nitrogen;
A pretreatment unit for pre-processing the external air to flow into the membrane module to generate partial pressure and to protect the membrane module;
A front temperature control unit cooling the air compressed by the compressor at a rear end of the pretreatment unit to a predetermined temperature and supplying the cooled air to the membrane module;
A rear temperature control unit for preheating the high purity nitrogen gas before the high purity nitrogen gas flows into the warm air heating unit of the roasting unit at the rear of the membrane module or at the rear of the nitrogen generating unit;
And a thermoelectric element configured to be in surface contact with the front temperature control part on one surface and to be in surface contact with the rear temperature control part on the other surface. The method of claim 1,
The roasting unit,
A roasting chamber which accommodates grain to be roasted;
And a housing part surrounding the roasting chamber and defining a flow path of the hot nitrogen gas, the housing part including an inlet of the high purity nitrogen gas and an outlet of the hot nitrogen gas.
The warm air heating unit,
Grain roasting apparatus is provided upstream of the roasting chamber of the flow path of the nitrogen gas in the housing portion. delete The method of claim 1,
The preprocessing unit,
A compressor for compressing the external air and supplying the compressed air to the membrane module;
An external air filter unit for filtering fine dust and foreign particles contained in the external air in front of the compressor;
Condensate removal unit for removing the condensate contained in the air compressed by the compressor; grain roasting apparatus comprising a. The method of claim 4, wherein
The condensate removal unit is composed of a centrifugal filter,
Between the compressor and the condensate removal unit,
An air tank for intermediately storing the compressed air generated by the compressor at a predetermined pressure to continuously discharge the compressed air;
And a flow control valve configured to adjust a flow rate of the compressed air continuously discharged from the air tank and supplied to the condensate removal unit. delete The method of claim 1,
The nitrogen generating unit,
And a post-treatment unit for treating impurities to be introduced into the roasting unit before introducing the high purity nitrogen flowing out of the membrane module into the roasting unit. The method of claim 7, wherein
The post-treatment unit, Particle removal unit for removing particles contained in the high purity nitrogen gas generated in the membrane module;
The particle removal unit, Particle roasting apparatus comprising a; particle filter for filtering the particles contained in the high purity nitrogen gas. The method of claim 8,
The particle removal unit,
And a combustion unit configured to combust and vaporize particles contained in the high purity nitrogen gas by burning the high purity nitrogen gas in which the particles are first filtered in the particle filter unit. 2. delete delete A grain roasting method for roasting grain by using the grain roasting apparatus according to claim 1,
A nitrogen gas generating step of generating high-purity nitrogen from the external air with a nitrogen generating unit and then flowing the high-purity nitrogen gas out of the nitrogen generating unit after introducing external air;
And a roasting step of heating the high purity nitrogen gas produced by the nitrogen gas generating step and heating the high purity nitrogen gas, and roasting the grains with the high temperature high purity nitrogen gas.

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