WO2017195922A1

WO2017195922A1 - Descending air current type infrared ray conveyor continuous drying apparatus

Info

Publication number: WO2017195922A1
Application number: PCT/KR2016/005080
Authority: WO
Inventors: 장태균
Original assignee: 장태균
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2017-11-16

Abstract

The present invention relates to a descending air current type infrared ray conveyor continuous drying apparatus (1) comprising: a body (10) having an input opening (11) formed on one side thereof and a discharge opening (12) formed on the other side thereof, wherein a drying material (g) to be dried is introduced through the input opening (11) and a dried material is discharged through the discharge opening (12); a mesh conveyor (20) for loading the drying material (g) thereon to sequentially transfer the drying material (g) from the input opening (11) to the discharge opening (12), the mesh conveyor (20) being installed inside of the body (10); a descending air current circulation drying means (40) which is installed on the body (10) and supplies air, having been suctioned from a lower portion of the body (10), again from an upper side of the body (10), so as to continuously circulate and supply the air to enable the air current (w) to flow toward the drying material (g) and the mesh conveyor (20) in a direction from the upper side to the lower side; and at least one near-infrared or one far-infrared heat generating device (100) installed on an upper side of the body (10).

Description

Downdraft Infrared Conveyor Continuous Drying Unit

The present invention relates to a continuous air drying apparatus for a downward air flow type infrared conveyor, one side is formed with an inlet (11) into which the drying material (g) to be dried is formed, and on the other side an outlet (12) for discharging the dried dry material. A mesh conveyor 20 installed in the main body 10 and sequentially transferring the dry material g from the inlet 11 to the outlet 12. And, installed in the main body 10, the air sucked from the lower portion of the main body 10 is supplied again from the upper side of the main body 10, the air flow (w) is the drying material (g) and the mesh (mesh) a descending air flow circulation drying means 40 continuously circulating and supplying to pass from the upper side to the lower side toward the conveyor 20; and near-infrared and far-infrared heat generating devices installed at least one upper side of the main body 10 ( 100); It relates to a downdraft type infrared conveyor continuous drying device (1) characterized in that it comprises a.

When drying fruits, vegetables, etc. in a drying device for a biological industry, a large part of organic ingredients (colors, flavors, chlorophyll, etc.) of the material are lost during drying due to prolonged exposure to heat.

For this reason, a drying method capable of drying in a short time without raising the temperature of the drying material is required as one of the above solutions. One of the existing embodiments of the conveyor type drying apparatus currently used for this purpose, such as the "drying material dryer and dry material drying method using the same" of Republic of Korea Patent Publication No. 10 = 1996-0013214, from the outside of the inner one side of the housing from the outside A hopper is installed to guide the incoming dry material to be put in, and an air plunger with perforated holes is installed and fixed on the bottom plate, and a blower pipe for directing hot air produced outside and forced ventilation into the dryer is installed at an appropriate place inside. In the installation of the carrying out effect to help the drying of the dried material on the other side, the upper and lower air pneumatic conveyors assembled in the endless track form by the hinge method at the lower side of the hopper horizontally installed side by side Disclosed is a configuration including a configuration in which a device orbits in a different direction.

However, in the case of this existing embodiment, the drying of the drying material is mostly achieved by the blowing of hot air, so there is not enough rapid drying, and the drying material on the conveyor is increased when the feed rate of hot air is increased to improve the drying speed. There was a problem flying off.

In another conventional embodiment, a method of improving the drying efficiency by installing a plurality of conveyors in a drying chamber, and a method of installing a far-infrared heater on the conveyor as a drying heat source have been tried to improve. Although effective, it was inadequate to shorten the drying time.

On the other hand, some conveyor type dryers such as pepper dryers use a method to shorten the drying time by installing a separate preheater at the tip of the dryer to reduce the drying time. The organic properties were being destroyed.

For this reason, there is a need for the invention of a dryer that can achieve drying time without raising the temperature of the material above a certain level.

The present invention improves the problems of the existing inventions described above, and by using near-infrared and far-infrared heat generators, it is possible to efficiently heat continuously to the inside of a drying material to be dried even at a relatively low temperature where carbonization or deterioration does not occur. It is an object of the present invention to provide a downflow type infrared conveyor continuous drying apparatus.

In addition, the drying material is stably in close contact with the conveyor by the hot air descending airflow passing through the drying material from the upper side to the lower side, and is lowered by the airflow which is increased in speed while passing through the narrow dry material space between the drying materials. It is an object of the present invention to provide a downflow type infrared conveyor continuous drying apparatus capable of rapidly discharging water vapor generated by heating inside a drying material by pressure, thereby enabling more rapid and efficient drying.

On the other hand, since the inside of the main body is partitioned by a partition wall, to provide a drying air flow type infrared conveyor continuous drying apparatus that can provide a drying environment optimized for each step during drying by adjusting the heating amount and the blowing amount for each manufacturing chamber. Let's do that task.

In order to achieve the above object, the downdraft type infrared conveyor continuous drying apparatus of the present invention is provided with an inlet port 11 through which a drying material (g) to be dried is formed at one side, and the dried drying material is discharged at the other side. A main body 10 having an outlet 12 formed therein, and a mesh installed inside the main body 10 and sequentially transferring the dry material g from the inlet 11 to the outlet 12 ( mesh) conveyor 20; and the air flow w is installed in the main body 10, and the air sucked from the lower part of the main body 10 is supplied again from the upper side of the main body 10 so that the air flow w becomes the drying material ( g) and a downdraft circulation drying means 40 continuously circulating and supplying the upper and lower sides of the mesh conveyor 20 so as to pass from the upper side to the lower side; and at least one near infrared ray installed above the main body 10. And a far infrared ray heating apparatus 100; Characterized in that comprises a.

In addition, the main body 10 has one or more partition walls having a passage opening through which the mesh conveyor 20 can pass therein, and are divided into a plurality of drying chambers by the partition walls. Characterized in that it is partitioned, the downdraft circulation drying means 40 and the near-infrared and far-infrared heat generating device 100 is characterized in that each one or more installed in each drying chamber to be independently operated.

In addition, the downdraft circulation drying means 40, the inlet port 41 for sucking air from the lower side surface of the main body 10 located below the mesh conveyor 20; and the inlet port ( A blowing means (42) for circulating blow driving the air sucked from the air (41); and a blowing hole (43) for supplying the air supplied from the blowing means (42) to the upper surface of the main body (10); Characterized in that further comprises.

In addition, the near-infrared and far-infrared heat generating device 100, the case 110 is formed with an opening 111 in the lower portion; and is installed in the inner lower portion of the case 110, a plurality of heater installation grooves 122 The heater mounting plate 121 is formed on both sides, respectively, the lower surface of the heater mounting plate 120 is opened; and is inserted and installed between the heater mounting groove 122 facing each other on both sides A heater means 130 for dissipating heat according to the supplied current; and a reflector plate 140 installed above the heater mount 120 to reflect heat radiated from the heater means 130; A ceramic filter plate (150) installed in the opening (111) and passing only far-infrared or near-infrared components of heat radiated from the heater means (130) and emitting far-infrared rays according to its own natural frequency; Characterized in that comprises a.

In addition, the temperature of the hot air circulating through each said drying chamber is measured by the temperature sensor (not shown) installed in the piping which connects the said intake port 41, the said blowing means 42, and the said blowing port 43. It is characterized by.

According to the present invention, there is an advantage that the near-infrared and far-infrared heat generators can be efficiently heated and continuously dried to the inside of the drying material to be dried even at a relatively low temperature where carbonization or deterioration does not occur.

In addition, the drying material is stably in close contact with the conveyor by the hot air descending airflow passing through the drying material from the upper side to the lower side, and is lowered by the airflow which is increased in speed while passing through the narrow dry material space between the drying materials. Due to the pressure, the water vapor generated by heating in the drying material can be quickly discharged, and thus there is an advantage that more rapid and efficient drying is possible.

On the other hand, the inside of the body is partitioned by the partition, there is an advantage that can provide a drying environment optimized for each step during the drying by adjusting the heating amount and the blowing amount for each drying chamber.

1: Schematic diagram of the shear plane showing the overall configuration of the continuous drying apparatus according to an embodiment of the present invention.

2 is a side cross-sectional schematic diagram showing a blowing configuration of a continuous drying apparatus according to an embodiment of the present invention.

3 is a schematic diagram showing a ventilation drying configuration of a continuous drying apparatus according to an embodiment of the present invention.

4 is a top view of the near-infrared and far-infrared heat generating apparatus of the continuous drying apparatus according to an embodiment of the present invention.

5 is a cross-sectional view of the near-infrared and far-infrared heat generating apparatus of the continuous drying apparatus according to an embodiment of the present invention.

6 is a view showing the configuration of a heater mounting stand and a reflector of the near-infrared and far-infrared heat generating apparatus of the continuous drying apparatus according to an embodiment of the present invention.

Figure 7 is a cross-sectional view showing the operation of the near-infrared and far-infrared heat generating apparatus of the continuous drying apparatus according to an embodiment of the present invention.

8: A graph showing the infrared transmission characteristics of the ceramic filter plate of the near infrared and far infrared heating device of the continuous drying apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a downdraft type infrared conveyor continuous drying apparatus according to an embodiment of the present invention will be described in detail. First, in the drawings, the same components or parts are to be noted that as indicated by the same reference numerals as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As shown in FIG. 1, the downdraft type infrared conveyor continuous drying apparatus of the present invention includes a main body 10, a mesh conveyor 20, a downdraft circulation drying means 40, and a near infrared and far infrared heating device 100. It characterized in that it is configured to include.

First, the main body 10 will be described. As shown in FIG. 1, the main body 10 has an inlet 11 through which a dry material g to be dried is introduced, and an outlet 12 through which the dried dry material is discharged is formed at one side thereof. have.

Next, the mesh conveyor 20 will be described. The mesh conveyor 20 is installed inside the main body 10 as shown in FIG. 1, and sequentially transfers the drying material g from the inlet 11 to the outlet 12. It performs the function. Meanwhile, as shown in FIGS. 2 and 3, the mesh conveyor 20 has a configuration in which air flows freely up and down. The mesh conveyor 20 having such a function may be configured through various embodiments such as a wire mesh and a conveyor cradle in which porous holes are formed.

Next, the downward airflow circulation drying means 40 is demonstrated. As shown in Figs. 1 and 2, the downdraft circulation drying means 40 supplies air sucked from the lower part of the main body 10 from the upper side of the main body 10 again, As shown, it has a function of continuously circulating and supplying airflow w to pass from the upper side to the lower side toward the drying material g and the mesh conveyor 20.

As an embodiment of implementing the descending air flow circulation drying means 40 having such a function, a wide variety of embodiments are possible, but the drying material g is loaded on the upper portion of the mesh conveyor 20. In consideration of this, the air flow (w) should be supplied from the upward direction so that the dry material (g) is stably in close contact with the upper part of the mesh conveyor (20) and is not scattered while being loaded and maintained. It is preferable to be configured in consideration of the frequent washing of water using water in the washing. To this end, the downdraft circulation drying means 40, as shown in Figure 2, of the main body 10 located below the mesh (conveyor) mesh (20) to prevent the inflow of wash water, etc. An air inlet 41 for sucking air from the lower side surface, a blower 42 for circulating and driving air sucked from the inlet 41, and air supplied from the blower 42 to the dry material ( It is preferable that the g) is further configured to include a blower 43 for supplying to the upper surface of the main body 10 so that it can be stably in close contact with the upper portion of the mesh conveyor (20).

Next, the near-infrared and far-infrared heat generating apparatus 100 are demonstrated. As shown in FIG. 1, one or more near-infrared and far-infrared heat generating apparatuses 100 are installed on the upper side of the main body 10 so as to efficiently dry inside a drying material to be dried at a relatively low temperature where carbonization or deterioration does not occur. Serves to provide a heat source for heating.

On the other hand, various embodiments are possible as an embodiment of the near-infrared and far-infrared heat generating device 100, and in one embodiment, the near-infrared and far-infrared heat generating device 100, as shown in Figs. A case 110 having an opening 111 formed therein, and a heater mounting plate 121 provided at the inner lower side of the case 110 and having a plurality of heater mounting grooves 122 formed on both sides thereof. The lower surface is inserted between the heater mounting stand 120 is opened and the heater mounting groove 122 facing each other on both sides, is installed, the heater means 130 for dissipating heat in accordance with the supplied current And a reflection plate 140 installed above the heater mounting unit 120 to reflect heat radiated from the heater means 130, and installed in the opening 111, and radiated from the heater means 130. Far Infrared or Near Infrared It is preferable to include a ceramic filter plate 150 that passes through the delivery, and emits far infrared rays according to its own natural frequency.

First, the case 110 will be described. The case 110 has a function of a main body constituting the near-infrared and far-infrared heat generating device of the dryer of the present invention. An opening 111 is formed in the lower portion of the case 110 as shown in FIG. 4 so that far infrared rays or near infrared rays can be emitted. Meanwhile, cooling means for supplying air for cooling into the case 110, as shown in FIG. 2, to discharge the contamination means that may be introduced into the case 110 and to prevent carbonization or deposition due to overheating. It is preferable that it further comprises 170. Even in this case, when the heater means 130 is configured to include any one of a halogen lamp or a carbon heater to be described later, since most of the heat transfer is transmitted in the form of radiation heat, such cooling or circulation The heat loss due to this is negligible.

Next, the heater mounting stand 120 is demonstrated. As shown in FIG. 5 and FIG. 6, the heater mounting stand 120 is installed at an inner lower side of the case 110, and heater mounting plates 121 having a plurality of heater mounting grooves 122 are formed at both sides. Each is formed, and the lower surface is open. In this case, the heater mounting unit 120 can be effectively received and released heat generated from the heater means 130, in order to cause a uniform thermal expansion as a whole without local expansion, aluminum having good thermal conductivity Or a metal alloy containing copper.

Next, the heater means 130 will be described. 5 and 6, the heater means 130 is inserted and installed between the heater installation grooves 122 facing each other on both sides, and has a function of dissipating heat according to the supplied current. On the other hand, each of the heater mounting plate 121 is the heat generating portion 131 as shown in Figures 5 and 6 to enable stable support despite the longitudinal expansion of the heater means 130 by thermal expansion It is preferable to be installed to support both ends of the side.

On the other hand, the heater means 130 is preferably configured to include any one of a halogen lamp or a carbon heater, so that the heating and instantaneous heat and temperature can be adjusted according to the current supplied as well as possible to immediately heat. The heater means 130 having such a heating characteristic is combined with the ceramic filter plate 150 to be described later, thereby bringing a unique operating effect of the present invention that can vary the distribution of the infrared wavelength band suitable for the drying target.

Next, the reflecting plate 140 will be described. As shown in FIGS. 5 and 6, the reflector plate 140 is installed above the heater mount 120 and has a function of reflecting heat radiated from the heater means 130. In this case, the reflector plate 140 is preferably made of a metal alloy containing aluminum having both good reflectance and thermal conductivity.

Next, the ceramic filter plate 150 will be described. The ceramic filter plate 150 is installed in the opening 111 as shown in FIGS. 5 and 7, and passes only the far-infrared or near-infrared components of the heat radiated from the heater means 130, and at its own natural frequency. Has the function of emitting far infrared rays. The ceramic filter plate 150 having such a function typically has a translucent property. This is explained in more detail as follows.

First, as shown in FIG. 8, the ceramic filter plate 150 transmits light near a far infrared ray or near infrared ray having a specific wavelength, and absorbs and blocks light having a short wavelength other than that.

On the other hand, the heater means 130 emits radiant heat of various wavelengths according to its characteristics, and when the heater means 130 includes any one of a halogen lamp or a carbon heater as described above, the current in nature As the supply increases, the wavelength of the near infrared region is output. Therefore, in order to maintain the emission state of the far-infrared wavelength, which is advantageous for the deep penetration of the material to be dried due to the long wavelength, the amount of current needs to be reduced, and when the amount of current decreases, the amount of heat required for drying is insufficient and drying does not occur.

Therefore, in order to solve the problem, the present invention uses a plurality of heater means 130 (halogen lamps or carbon heaters) to supply a sufficient amount of heat for drying even at a low current amount, and at the same time, an infrared ray that is an efficient output wavelength for drying. It was possible to supply a large amount of heat required for drying while maintaining the wavelength.

On the other hand, according to the change of the absorption wavelength band (for example, red red pepper and blue cucumber, the wavelength of infrared rays which mainly absorbs) according to the color and characteristic of a dry material. When adjusting the amount of current supplied to each of the 130, it is also possible to adjust the wavelength distribution of the infrared rays generated by the heater means 130. That is, if the amount of current supplied to each of the heater means 130 is reduced, the radiation rate of the far infrared rays having a long wavelength is increased and the radiation rate of the near infrared rays having a shorter wavelength is decreased, and when the current supplied is increased, On the contrary, since the emission ratio of long infrared rays is reduced and the emission ratio of near infrared rays with short wavelengths becomes large, it is possible to adjust the wavelength region characteristics of the overall output.

On the other hand, when the operating means is typically supplied to the heater means 130, heat of about 80% is generated in the form of infrared rays, and heat is generated in about 20% of the wavelengths other than the infrared rays, the wavelength band other than the infrared The heat generated by the heat is concentrated on the surface of the dry material, causing the surface of the dry material to overheat and deteriorate the drying quality. In this case, as shown in FIG. 8, the ceramic filter plate 150 transmits light near a far infrared ray or near infrared ray having a specific wavelength, and absorbs and blocks light having a short wavelength other than that. This good long wavelength infrared ray (far infrared ray or near infrared ray) passes, and heat of the short wavelength (for example, visible light or ultraviolet ray) having low permeability is absorbed by the ceramic filter plate 150, and the ceramic filter plate 150 itself. It will raise the temperature of.

Therefore, as the temperature rises, even heat sources of short wavelengths (for example, visible light or ultraviolet light) having low permeability are emitted as heat in the far infrared wavelength range, so that most of the heat generated is in the form of highly transparent infrared rays (near infrared to far infrared). The dry material is made of infrared rays (near-infrared to far-infrared) with high permeability as a heat source, so that the temperature difference between the surface and the inside of the dry material is slightly heated, and the activation of internal moisture proceeds quickly, thereby increasing the efficiency of the dryer. .

In addition, since the ceramic filter plate 150 also has a function of blocking the heater means 130 to the outside as shown in FIG. 5, the heater means 130 as a heat source is connected to the ceramic filter plate 130. Since heat can be generated in a structure separated from the drying chamber, contamination of the heater means 130 is not only prevented at the source, but also deposition or carbonization of contaminants can be prevented.

On the other hand, the main body 10, as shown in Figure 1, there is one or more partitions provided with a passage hole through which the mesh conveyor (20) can pass, a plurality of by the partition Divided into two drying chambers, and the downdraft circulation drying means 40 and the near-infrared and far-infrared heat generating device 100 are installed in each of the drying chambers so as to operate independently one or more, and each drying chamber. It is desirable to adjust the heating amount and the blowing amount for each so as to provide an optimized drying environment for each step during drying. In FIG. 1, the internal space of the main body 10 includes four spaces of the first drying chamber 15, the second drying chamber 16, the third drying chamber 17 and the fourth drying chamber 18. One exemplary embodiment divided into a drying chamber is shown as an example, and the number of the drying chambers is not limited thereto and may be added or subtracted as necessary.

By this configuration, a section that gives a strong heat when the temperature of the drying material (g) at the beginning of drying, a section that supplies only the heat necessary for maintaining a moderate water activity when the temperature of the dry material reaches the water active temperature, It is possible to construct a compartment in which the dry material gives a weak heat for water balance at the time when drying is complete. Of course, the larger the number of compartments, the more efficient and precise drying can be done. In this case, the temperature of each drying chamber is the intake port 41 and the blowing means 42 so that the temperature of the circulating hot air can be accurately measured to avoid the radiant heat directly radiated from the near-infrared and far-infrared heat generating device 100. And it is preferably measured by a temperature sensor (not shown) installed in the pipe connecting the vents (43). Further, in this case, the output of the near-infrared and far-infrared heat generating device 100 in each of the drying chambers and the operating strength of the downdraft circulation drying means 40 in accordance with a value set by the user to the drying temperature of each drying chamber. It is preferable to configure so as to adjust. After measuring the temperature of the circulating hot air in this way, according to the value set by the user to the drying temperature of each of the drying chamber, the output of the near-infrared and far-infrared heat generating device 100 in each drying chamber and the downdraft The technique for configuring and controlling the operating strength of the circulation drying means 40 is a level of technology well known and used in the art to which the present invention pertains, and thus detailed description thereof will be omitted.

Hereinafter, the drying operation process by the downdraft of the downdraft type infrared conveyor continuous drying apparatus 1 according to an embodiment of the present invention will be described.

As shown in FIG. 2, the downdraft type infrared conveyor continuous drying apparatus 1 according to an embodiment of the present invention receives air sucked from the lower portion of the main body 10 by the downdraft circulation drying means 40. The air flow w is continuously supplied from the upper side of the main body 10 so that the air flow w passes through the upper side and the lower side toward the drying material g and the mesh conveyor 20. In this case, the air flow w has a function of allowing the dry material g to be stably adhered to the mesh conveyor 20 stably without being scattered and transported in a fixed state. . Further, as shown in FIG. 3, the space between the drying materials is increased by the air flow w, which is increased in speed while passing through the narrow space between the drying materials s between the drying materials g, according to Bernoulli. The effect is that the dynamic pressure of the negative s becomes lower than the surroundings. In this case, moisture vaporized in the form of water vapor (v) inside the drying material (g) by heat supply is in Boyle's law that "the pressure of a certain amount of gas at a constant temperature is inversely proportional." As a deriving effect, the diffusion of gas is expelled into the space between the drying materials s more quickly and efficiently, according to the principle that the pressure is made more effectively in the lower direction.

On the other hand, the air flow (w) is prevented from overheating the upper side of the drying material (g) by the heat supplied from the near-infrared and far-infrared heat generating device 100 concentrated on the upper side of the drying material (g), such as carbonization It also has a function to prevent deterioration.

In the foregoing description, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A main body 10 having one side formed with an inlet 11 through which dry material g to be dried is introduced, and an outlet 12 through which the dried dry material is discharged;

A mesh conveyor (20) installed inside the main body (10) and sequentially transferring the drying material (g) from the inlet (11) to the outlet (12);

Installed in the main body 10, the air sucked from the lower portion of the main body 10 is supplied again from the upper side of the main body 10 so that the air flow (w) is the drying material (g) and the mesh conveyor (mesh) Downward airflow circulation drying means 40 for continuously supplying and circulating to pass from the upper side to the lower side toward the 20;

Near-infrared and far-infrared heat generating device 100 is installed at least one side of the main body 10; Downstream air flow type infrared conveyor continuous drying device, characterized in that it comprises a.
The method according to claim 1,

The main body 10 therein,

At least one barrier rib having a passage hole through which the mesh conveyor 20 can pass is installed, and is divided into a plurality of drying chambers and partitioned by the barrier rib.

The downdraft circulation drying means 40 and the near-infrared and far-infrared heat generating device 100 are installed in each of the respective drying chambers so as to operate independently of each other, the downdraft type infrared conveyor continuous drying device 1 .
The method according to claim 1 or 2,

The downdraft circulation drying means 40,

An intake port 41 for sucking air from a lower side surface of the main body 10 positioned below the mesh conveyor 20;

Blowing means (42) for circulating blow driving the air sucked from the inlet (41);

A blowing hole 43 for supplying air supplied from the blowing means 42 to an upper surface of the main body 10; Downflow type infrared conveyor continuous drying device, characterized in that further comprises a.
The method of claim 3, wherein

The near infrared and far infrared heating device 100,

A case 110 having an opening 111 formed at a lower portion thereof;

A heater mounting plate (120) installed at an inner lower side of the case (110) and having heater heaters (121) formed therein with a plurality of heater mounting grooves (122) formed at both sides thereof, and the lower surface thereof being open;

A heater means 130 inserted between the heater installation grooves 122 facing each other on both sides and discharging heat according to a supplied current;

A reflector plate 140 installed above the heater mount 120 to reflect heat radiated from the heater means 130;

A ceramic filter plate (150) installed in the opening (111) and passing only far-infrared or near-infrared components of heat radiated from the heater means (130) and emitting far-infrared rays according to its own natural frequency; Downstream air flow type infrared conveyor continuous drying device, characterized in that it comprises a.
The method according to claim 4,

The temperature of the hot air circulating through each of the drying chambers is measured by a temperature sensor (not shown) installed in a pipe connecting the intake port 41, the blower means 42, and the blower port 43. Downdraft type infrared conveyor continuous drying apparatus (1).