JP2014081152A - Drum type dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type dryer capable of drying a food product evenly and efficiently while removing impurity, and capable of treatment which is the same as being picked by hand, especially for edible wild plants.SOLUTION: A drum type dryer 1 includes a warming part 2 and a dying chamber 3. The warming part 2 includes: an air supply port 4; a heater 5 for warming air; a fan 6 for sending out warm air; a blowing air port 7 for blowing the warm air into the drying chamber 3; and a suction port 8 for circulation for sucking the warm air from the drying chamber 3 to the warming part 2. The drying chamber 3 includes: a central drying chamber 11 for supporting a drum 10; an air outlet 12 at the rear lower part of the central drying chamber 11; and a blowing air port 13 for circulation and an exhaust port 14 at the rear upper part of the central drying chamber 11. The central drying chamber 11 includes: bearing parts 17a and 17b; slide rails 18a and 18b; and flange joints 19a and 19b. The drum 10 includes discs 22a and 22b which can be attached to/detached from the flange joints 19a and 19b, and which can roll on the slide rails 18a and 18b.

Description

  The present invention relates to a drum-type dryer that supplies hot air to food contained in a drum in a drying chamber and dries the food, and more particularly, a central dryer having bearings and slide rails on both sides. The present invention relates to a drum-type dryer that includes a chamber and a drum provided with a disc that can roll on a slide rail at both end faces.

Conventionally, in a drum-type dryer for food, the inner surface of the drum has a smooth shape with no protrusions or the like. Moreover, the food material was put into the drum and the drum was simply rotated while supplying warm air.
However, depending on the weight and material of the food introduced into the drum, there is a problem that the food becomes a lump and rotates together with the drum, so that the finished product is not uniformly dried. Moreover, since it was not possible to separate the dust mixed in the raw material and the dust generated in the drying process, there was a problem that the finished product was mixed with impurities.
Therefore, in order to solve such problems, in recent years, technologies related to food dryers capable of drying raw materials uniformly and efficiently and at the same time removing dust and the like have been developed, and several inventions have already been disclosed in this regard. Has been.

Patent Document 1 discloses a device related to a dryer for wild vegetables and the like that can be widely used for wild vegetables and the like under the name "dryer for wild vegetables and the like".
Hereinafter, the device disclosed in Patent Document 1 will be described. The device disclosed in Patent Document 1 is provided sideways with an opening / closing door in the body portion, a large number of through holes formed in the body portion, and an opening window portion formed in the center of one side surface. Wild vegetables including a rotating drum, a machine frame that rotatably supports the rotating drum, a rotation driving device of the rotating drum disposed in the machine frame, and a blower connected to an opening window of the rotating drum In this dryer, a scraping member such as wild plants made of a plurality of rod-like bodies arranged from one side to the other side is fixedly provided on the inner peripheral surface of the drum portion of the rotating drum.
In a dryer such as a wild vegetable having such characteristics, when the rotating drum is rotated, the stored wild vegetable is scraped up by the scraping member and reaches the top of the rotating drum, and then freely falls. Has the effect of dropping to the bottom of the rotating drum. Further, the dust and the like separated at this time is discharged from a through hole formed in the body portion of the rotating drum. Therefore, it is possible to perform a process such as hand-bending such as bending or folding the vegetable fibers of wild plants at the same time as drying, and it is possible to easily and reliably separate garbage.

Next, Patent Document 2 discloses an invention related to a microwave rotary dryer that supplies hot air and microwaves into a rotary drum to dry food processing residues and the like under the name of “microwave rotary dryer”. .
The invention disclosed in Patent Document 2 includes a rotating drum in which lifter blades parallel to the axial direction are provided at a plurality of locations along the circumferential direction of the inner circumferential surface, and a drum that rotates along the circumferential direction while supporting the rotating drum. A rotating drum device comprising a support / drive device, a duct having a duct inlet communicating with one end surface of the rotating drum, a duct outlet communicating with the other end surface of the rotating drum, and a fuel interposed in the duct A hot air generator comprising a hot air generator that blows combustion gas obtained by burning the gas into the duct, and a circulating fan that blows the air in the duct from the duct inlet portion toward the duct outlet portion. And a microwave oscillating device that generates a microwave, and a waveguide that is inserted into the rotating drum from the end surface of the rotating drum and that guides the generated microwave and radiates it into the rotating drum. Characterized in that characterized in that the charging device, in being configured.
In the microwave rotary dryer having such characteristics, the food processing residue collected below the rotating drum is scraped upward along the circumferential direction by the lifter blade, and when approaching the top in the circumferential direction, the food processing residue is lowered from above. Fall into. Then, after a certain period of time has passed since the hot air heating is started, the microwave is radiated into the rotating drum, so that the food processing residue is externally heated by the hot air while being stirred in the rotating drum and internally heated by the microwave. Has the effect of being Therefore, the food processing residue is heated uniformly both inside and outside, and there is an effect that it can be dried in a short time without drying unevenness.

Registered Utility Model No. 3005693 International Publication No. 01/007850

However, in the device disclosed in Patent Document 1, air is blown into the rotary drum by a blower connected to the opening window of the rotary drum, and this blown air is discharged from the through hole of the rotary drum. The rotating drum itself is not housed in a box or the like. Therefore, there is a possibility that it is difficult to maintain a high temperature inside the rotating drum as compared with a case where the box is accommodated in a box or the like. Moreover, the direction of ventilation is always directed from the inside to the outside of the rotating drum, and the through holes of the rotating drum are likely to be clogged by wild vegetables that are to be dried.
Further, since the scraping member has a structure in which a plurality of rod-shaped bodies are arranged from one side to the other side on the inner peripheral surface of the drum portion of the rotating drum, there is a possibility that the amount of wild vegetables that cannot be scraped increases and is not efficient.

Next, in the invention disclosed in Patent Document 2, the rotating drum has a substantially sealed structure, and has a configuration in which a granular dry matter is naturally dropped from the take-out hatch and taken out. Therefore, it is considered that impurities such as fine powder and dust are mixed in the extracted dried product, and as a result, the purity of the dried product may be lowered. Further, like the idea disclosed in Patent Document 1, the rotating drum is not accommodated in a box or the like, and further, drying with hot air takes out a part of the gas from the duct of the hot air supply device, and the extracted gas Is performed by condensing the vapor contained in the gas by cooling with cooling water for cooling the microwave oscillator, so that energy efficiency may not be good.
Also, in order to prevent microwave leakage and damage to the microwave oscillator, electromagnetic seal members are provided on rotary bearings and isolators are provided on the waveguide. It may become difficult for customers to introduce.

  The present invention has been made in response to such a conventional situation, and can be dried uniformly and efficiently while removing impurities from the raw material. An object of the present invention is to provide a drum dryer that can perform the same treatment. Another object of the present invention is to provide a drum-type dryer particularly excellent in maintainability of a rotating drum.

In order to achieve the above object, a drum-type dryer according to the first aspect of the present invention is provided with a heating unit that heats air to make warm air, and is disposed adjacent to the heating unit, and is provided inside. A drying chamber having a cylindrical shape with a plurality of holes formed in the outer peripheral surface and provided with a drum for containing food, and drying the food by circulating hot air inside the drum A drum-type dryer, wherein the heating unit is opened on one surface and takes in air from the outside, and a heater that warms the air taken in from the air supply port to warm air; A fan that sends warm air, an air supply port that communicates with the drying chamber and sends warm air into the drying chamber, and a circulation inlet that communicates with the drying chamber and draws warm air from the drying chamber into the heating unit The drying chamber is a box having a front door, and a central drying chamber that supports the drum horizontally in the box. An air outlet that communicates with the air supply opening and opens at the lower rear of the central drying chamber, and an air supply for circulation that communicates with the heating unit and opens at the upper rear of the central drying chamber to circulate hot air to the heating unit And an exhaust port that opens to the rear upper part of the central drying chamber and exhausts warm air to the outside. The central drying chamber has bearing portions on both side surfaces and horizontally below these bearing portions. A slide rail to be installed, and a flange joint that is pivotally supported by the bearing portion and disposed above the slide rail. The drum is disposed so as to be able to rotate on a horizontal axis, and is attachable to and detachable from the flange joint on both left and right side surfaces. A disc that can roll on a slide rail is provided.
In the drum-type dryer having such a configuration, “a cylindrical structure in which a plurality of holes are formed in the outer peripheral surface” is a concept that includes a case where the outer peripheral surface has a mesh structure. It means something that can be distributed. Further, “supporting the drum horizontally” means that the shaft center is horizontally supported, and the drum rotates horizontally. Furthermore, the “slide rail” is fixed to both inner side surfaces of the central drying chamber, and the rail itself does not slide.
In the drum-type dryer having the above-described configuration, the drum that performs the horizontal rotation is supported by the central drying chamber, and air is supplied to the lower rear portion of the central drying chamber, that is, the lower rear portion of the drum. An air outlet communicating with the opening is opened, and warm air is blown into the drum through a plurality of holes. Moreover, since the food accommodated in the drum moves as it rotates, the food has the effect that the entire surface receives hot air and is uniformly dried.
In addition, the central drying chamber has a circulation air supply port for circulating hot air to the heating part and an exhaust port for exhausting the warm air to the outside at the upper rear part. The wind again passes through the drum through the plurality of holes, and a part thereof is sent again to the drying chamber through the heating unit, and the remaining warm air is exhausted to the outside. Therefore, the temperature in the drying chamber is prevented from excessively rising or falling, and an appropriate drying temperature is maintained.
Further, for example, an air supply amount into the drying chamber is adjusted by providing an opening / closing type closing plate at the air supply port and adjusting the opening / closing degree. Note that when the closing plate is completely closed, warm air is not exhausted from the exhaust port in order to avoid negative pressure in the drying chamber.

In addition, since both inner side surfaces of the central drying chamber are provided with bearing portions and flange joints that are pivotally supported by the bearing portions, discs that can be attached to and detached from the flange joints are provided on the left and right end surfaces of the drum. When the disc is mounted on the flange joint, the drum is supported by the bearing portion and rotates around the horizontal axis. Note that the mounting of the disk to the flange joint is performed, for example, by inserting a tightening bolt into both of the surfaces where the disk and the flange portion are overlapped and tightening them. In order to enable this tightening, the disk and the flange joint are provided with a plurality of holes through which the tightening bolts pass at symmetrical positions on both sides.
On the other hand, when the disc is not attached to the flange joint, for example, when the tightening bolt is removed from the disc and the flange joint, the disc is placed on the slide rail that is installed horizontally below the bearing portion. Is done. Further, since this disk can roll on the slide rail, when the disks on both sides are rolled forward, the entire drum acts to be pulled out in the same direction.
Furthermore, by pushing back the pulled-out drum to a position where the fastening bolt can penetrate both the disc and the flange joint, and tightening the multiple fastening bolts, the disc is mounted on the flange joint again, and the drum It returns to the state where it can rotate. The tightening bolts are tightened by first tightening the tightening bolts at symmetrical positions on both sides, and further rotating the disk slightly to tighten the tightening bolt at the next symmetrical position. Since all of the tightening bolts are tightened by sequentially repeating this operation, the disk is mounted on the flange joint without lifting the drum.

Next, the drum type dryer according to the invention described in claim 2 is the drum type dryer according to claim 1, wherein the front door is elongated on the inner surface along a direction parallel to the horizontal rotation axis of the drum. The rectifying member protrudes to a position close to the outer peripheral surface of the drum below the rotating shaft of the drum, and is configured to allow the warm air blown from the outlet to flow inside the drum. It is characterized by that.
In the drum-type dryer having such a configuration, the rectifying member has at least one plane along a direction substantially orthogonal to the direction of blowing warm air, and the overall shape is, for example, a rectangular plate shape, a triangular shape, and a triangular shape. It is columnar. The direction in which the rectifying member protrudes is the direction of the rotating shaft of the drum.
Therefore, in the drum type dryer provided with this rectifying member, in addition to the action of the invention according to claim 1, the hot air blown out from the outlet collides with the plane of the rectifying member and moves in the direction of the rotation axis of the drum. The direction changes. Since the rectifying member protrudes to a position close to the outer peripheral surface of the drum, the warm air is guided to the vicinity of the outer peripheral surface of the drum and immediately enters the inside thereof. That is, the rectifying member prevents the hot air from flowing along the outer peripheral surface of the drum, and the hot air is concentrated on the food stored in the drum. The warm air passes around the food and is discharged to the outside of the drum again. In addition, since the circulation air supply port and the exhaust port are opened at the upper rear part of the central drying chamber, the warm air discharged to the outside of the drum is quickly sent without staying in the circulation air supply port and the exhaust port. Then, it is recirculated into the central drying chamber or exhausted out of the dryer.

Next, the drum dryer according to the invention described in claim 3 is the drum dryer according to claim 1 or 2, wherein the drum is arranged on the inner peripheral surface thereof in a direction parallel to the rotation axis. Plate-shaped lifters are provided, and these lifters are arranged in parallel with a certain interval along the inner peripheral surface of the drum and project in the direction of the rotation axis.
In the drum type dryer having such a configuration, in addition to the operation of the invention of claim 1 or 2, the food is lifted by the lifter positioned below according to the rotation of the drum, and reaches the vicinity of the top of the drum. This has the effect of naturally falling downward. During the rotation of the drum, since the food continues to rise and fall, the food is unraveled and separated from each other even if it is initially in a lump, and as a result, the individual foods are evenly dried. .

Furthermore, the drum-type dryer according to the invention of claim 4 is the drum-type dryer according to any one of claims 1 to 3, wherein the box is drilled in the vicinity of the circulation air supply port. The dust collection filter is inserted through the opening, and the dust collection filter is configured to be slidable along the cross section of the circulation air supply port.
In the drum-type dryer having such a configuration, in addition to the operation of the invention according to any one of claims 1 to 3, the dust collection filter is provided along the transverse section of the circulation air supply port. For this reason, it is possible to prevent food waste generated by dust and drying from circulating to the heating section. Therefore, it has an effect that dust and the like are prevented from reattaching to food while the drum dryer is in operation. Further, the dust collection filter is inserted through an opening formed in the vicinity of the circulation air supply port, and is configured to be slidable. Therefore, the dust collection filter has an action of being freely removed from the opening. In addition, a metal mesh etc. are used for a dust collection filter, for example.

According to the drum dryer according to the first aspect of the present invention, the food is uniformly dried by receiving hot air over the entire surface, so that a high-quality dried food can be efficiently completed. Moreover, since an appropriate drying temperature is maintained in the central drying chamber, it is possible to prevent the food from being deteriorated due to excessive and excessive drying. In addition, since a part of the warm air after the food is dried is again sent to the drying chamber, the energy efficiency is good. Furthermore, since the air supply volume is adjusted by adjusting the opening / closing degree of the closing plate, the optimum drying according to the food material, weight, or climate depends on the combination of the opening / closing degree and the set temperature and drying temperature. It is possible to make fine adjustments freely so as to be in a state.
Further, for example, the drum is separated from the bearing portion by removing the tightening bolt, and the drum can be pulled out by rolling the disk on the slide rail, so that only the drum can be cleaned after drying. Therefore, the inside of the drum can be kept clean at all times, so that dried food can be produced hygienically. After cleaning, the disc is mounted on the flange joint without lifting the drum, so that the drum can be easily returned to a rotatable state. That is, it is possible to provide a drum dryer that is particularly excellent in maintainability.

  According to the drum type dryer according to claim 2 of the present invention, in addition to the effect of the invention according to claim 1, since warm air concentrates on the food stored in the drum by the rectifying member, It has the effect that the warm air which does not contribute to drying does not generate | occur | produce. After that, the warm air discharged to the outside of the drum is quickly sent to the circulation air inlet and exhaust port, so there is no stagnation of the hot air circulation throughout the drum dryer, and the food is efficiently dried. It is possible to make it. The invention described in claim 1 has the same effect. In particular, in the invention described in claim 2, warm air is blown from the outside of the drum to the outside, and the supply of the warm air is internally performed. Since this is not one-way from the outside to the outside or from the outside to the inside, it is possible to prevent clogging of a plurality of holes formed in the drum. Therefore, it can be said that a drum type dryer excellent in maintainability can be provided from this.

  According to the drum type dryer according to claim 3 of the present invention, in addition to the effects of the invention according to claim 1 or 2, for example, even a food containing a lot of water is forcibly separated. It is possible. Therefore, warm air reaches the details of the food, and the food can be brought into a homogeneous dry state. In addition, since foods are repeatedly raised and dropped, wild springs such as springs that contain a large amount of fiber components are in the same flexible state as if they were treated by hand, so that high-value products can be obtained. Can be completed easily.

  According to the drum type dryer according to claim 4 of the present invention, in addition to the effect of the invention according to any one of claims 1 to 3, it is possible to prevent dust and the like from circulating to the heating section. Therefore, for example, dust or the like can be prevented from adhering to the fan provided in the heating unit. In addition, since the dust collection filter is freely removed from the opening, it is easy to clean the dust collection filter after drying. Therefore, the probability of occurrence of a failure can be reduced, and a high-purity dried food can be produced.

(A) is a front view in the state where a front door of a drum type drier concerning an example was omitted, and (b) is an AA line arrow sectional view of (a). It is a perspective view at the time of front door opening in the drum type dryer concerning an example. (A) And (b) is the perspective view and side view of a rotating shaft part of a drum in a drum type drier concerning an example, respectively. (A) And (b) is the side view and oblique perspective view of the lifter part of the drum in the drum type dryer which concerns on an Example, respectively.

A drum dryer according to an embodiment of the present invention will be described in detail with reference to FIGS. Note that the components shown in FIG. 1 are denoted by the same reference numerals in FIGS. 2 to 4 and description thereof is omitted.
Fig.1 (a) is a front view in the state which abbreviate | omitted the front door of the drum type dryer which concerns on an Example, FIG.1 (b) is AA arrow directional cross-sectional view of Fig.1 (a). is there. However, in FIG. 1B, a front door is additionally described for understanding the structure.

As shown in FIGS. 1A and 1B, the drum dryer 1 according to this embodiment includes a heating unit 2 disposed in contact with the rear surface and a front side of the heating unit 2. And a drying chamber 3 arranged as described above.
As shown in FIG. 1 (b), the heating unit 2 includes an air supply port 4 that is opened above the rear surface and takes in air from the outside, a heater 5 that heats the taken-in air to warm air, A fan 6 that sends out warm air, an air supply port 7 that communicates with the drying chamber 3 to send warm air into the drying chamber 3, and a warming unit that communicates with the drying chamber 3 from the drying chamber 3. 2 is provided with a circulation inlet 8 for suction. The air supply opening 4 is provided with an openable / closable closing plate (not shown), and the air supply amount into the drying chamber 3 is adjusted by adjusting the opening / closing degree. The heater 5 is provided with a burner (not shown), and the exhaust is discharged to the outside of the drum dryer 1 by a chimney 5a.
Next, as shown in FIG. 1 (a), the drying chamber 3 is a box composed of a front door 3a, side plates 3b and 3c, a rear plate 3d, a top plate 3e, and a bottom plate 3f. A central drying chamber 11 that supports a cylindrical drum 10 containing food 9 so as to be rotatable in a horizontal axis, an air outlet 12 that communicates with the air supply opening 7 and opens at the lower rear of the central drying chamber 11, and heating. A circulation air supply port 13 that communicates with the section 2 and opens in the upper rear part of the central drying chamber 11 and circulates the warm air to the heating unit 2, and opens in the upper rear part of the central drying chamber 11 and sends the hot air to the outside And an exhaust port 14 for exhausting. The heating unit 2 and the drying chamber 3 are separated by a rear plate 3d. The side plates 3b and 3c are opened with window portions 3g and 3g through which shaft portions 20a and 20b of flange joints 19a and 19b described later can pass, respectively. The specific size of the drum 10 is about 650 mm in diameter × 1000 mm in length. Of course, the size may be appropriately changed according to the amount of food 9 to be dried and the drying efficiency.

  The front door 3a has a so-called double door structure with left and right doors, and as shown in FIG. 1 (b), a rectifying member 15 having a triangular cylindrical shape with a side of about 100 mm is formed on the inner side surfaces thereof. is set up. The drum 10 has a metal mesh structure, and is provided with an opening / closing door (not shown) through which a food 9 can be charged or taken out at a part of the peripheral surface. In addition, a dust collection filter 16 formed of a metal mesh is inserted into the circulation air supply port 13 so as to penetrate the side plate 3 c, so that the structure can slide along the cross section of the circulation air supply port 13. doing. The exhaust port 14 is always open.

Further, the central drying chamber 11 is a space located above the tray 11 a in the drying chamber 3 and is disposed above the outlet 12. A portion of the tray 11a near the front door 3a is provided with an open portion 11b so as to allow ventilation. Then, outside the side plates 3b and 3c, bearing portions 17a and 17b are provided at the same height from the bottom plate 3f. On the inner side of the side plates 3b and 3c, slide rails 18a and 18b having a long and substantially cubic shape with a smooth upper surface are fixed at the same height from the bottom plate 3f below the bearing portions 17a and 17b, respectively. Has been. Specifically, the size of the slide rails 18a and 18b is about 50 mm × 50 mm × 500 mm. Above the slide rails 18a and 18b, flange joints 19a and 19b are provided, respectively. The flange joints 19a and 19b have shaft portions 20a and 20b that are pivotally supported by the bearing portions 17a and 17b on the outer sides of the side plates 3b and 3c, respectively, and flanges that are disposed on the inner sides of the side plates 3a and 3b. Part 21a, 21b. The diameters of the flange joints 19a and 19b and the flange portions 21a and 21b are all about 200 mm.
The drum 10 is provided with discs 22a and 22b detachably attached to the flange joints 19a and 19b on both left and right end surfaces. The disks 22a and 22b have a circular structure and can roll on the slide rails 18a and 18b, respectively.

When the drum dryer 1 is operated, the front door 3a is closed, and the measured temperature and drying time inside the drying chamber 3 are numerically displayed on a display panel (not shown) installed on the side plate 3c. Is done. The temperature of the hot air can be freely set by operating a dial (not shown), and the actually measured temperature is always measured by a thermometer (not shown) installed at the outlet 12.
The drum 10 is driven by a driving unit 23 installed near the side plate 3c. The drive unit 23 includes a motor 23a installed on the upper outer side of the drying chamber 3, a gear 23b provided at an end of the shaft portion 20b that extends outward, and a belt that transmits the power of the motor 23a to the gear 23b. 23c.

Next, the drum type dryer according to the embodiment will be described in more detail with reference to FIG.
FIG. 2 is a perspective view of the drum dryer according to the embodiment when the front door is opened. As described above, the front door 3a is composed of left and right doors. FIG. 2 shows a case where the right door 3a is slightly opened and the left door 3a is omitted. .
As shown in FIG. 2, on the inner side surface of the front door 3 a in the drum dryer 1 of this embodiment, a rectifying member 15 is fixedly installed with one of the apexes in the cross section protruding in the direction of the drum 10. . The height of this protrusion is such that when the front door 3a is closed, it approaches the circumferential surface of the drum 10 with a slight gap, and the specific gap is approximately 30 mm. One rectifying member 15 is provided for each of the left and right doors 3 a, and the total length of these is equal to the width of the drum 10.

Next, the attachment and detachment of the drum in the drum dryer according to the embodiment will be described in more detail with reference to FIG.
FIG. 3A and FIG. 3B are a perspective view and a side view, respectively, of the rotating shaft portion of the drum in the drum dryer according to the embodiment.
As shown in FIG. 3A, the flange portion 21a is provided with four through holes 24a to 24d. And the cylindrical holes 25a-25d are integrally provided in the disk 22a in the one end surface of the drum 10 in four places which become the same position as the through-holes 24a-24d when these are piled up in parallel. Then, tightening bolts 26a to 26d are inserted into the through holes 24a to 24d and the cylindrical holes 25a to 25d whose positions match each other.

3 (b), the position _{X 1} and position _{X 2} indicates the center position of the disk 22a, respectively. Center position _{X 1} in the disk 22a is coincident with the center of the bearing portion 17a. On the other hand, the position _{X 2} in the disc 22a is separated from the bearing portion 17a, it is placed directly on the slide rail 18a of the front door 3a closer. Thus, the disk 22a has a structure that can freely reciprocate between the bearing portion 17a and the slide rail 18a. The same applies to the disk 22b.

Next, the lifter in the drum dryer according to the embodiment will be described in more detail with reference to FIG.
FIG. 4A and FIG. 4B are a side view and an oblique perspective view, respectively, of the lifter portion of the drum in the drum dryer according to the embodiment.
As shown in FIG. 4A, the drum 10 in the drum dryer 1 of the present embodiment has four long plate-like lifters 27a to 4 at a total of four positions at intervals of 90 degrees in the cross section. 27d is provided. These lifters 27a to 27d protrude toward the center of the disk 22a. The specific protrusion height is approximately 50 mm.
Next, as shown in FIG. 4B, if the drum 10 rotates in the direction of the arrow in the figure, the food 9 in front of the lifter 27a is lifted in the same direction and naturally falls near the top of the drum 10, It is a structure that falls around the other lifters 27b to 27d.

In the parallel flow dryer 1 of the present embodiment, air is taken in from the air supply port 4 by operating the fan 6 and the heater 5, and circulation of warm air inside the drum dryer 1 is started. At the same time, by driving the drive unit 23, the driving force is transmitted to the disk 22b via the flange joint 19b, and the rotation of the drum 10 is started.
Subsequently, the air circulation action in the drum dryer according to the embodiment will be described in detail with reference to FIGS. 1 and 2.
As shown in FIG. 1B, air (black arrow in the figure) taken in from the air supply port 4 is pushed in the direction of the heater 5 by the fan 6 and added while the side of the heater 5 is lowered. It becomes warm and becomes warm air (open arrow in the figure). The temperature of the warm air is specifically normal temperature (room temperature) to 60 ° C. The warm air passes through the air supply port 7, the air outlet 12, and the opening portion 11 b, rises in the central drying chamber 11, and collides with the lower surface of the rectifying member 15. The hot air is deflected in the direction of the rotation axis of the drum 10 by the collision, and flows in a direction substantially perpendicular to the peripheral surface of the rotating drum 10. The warm air flows into the drum 10 via a mesh structure formed on the peripheral surface of the drum 10.
As a result, the hot air does not flow along the peripheral surface of the drum 10, but immediately enters the inside thereof (see FIG. 2).
Further, the warm air passes through the food 9 inside the drum 10, and then blown out again to the central drying chamber 11 through the mesh structure formed on the peripheral surface of the drum 10. As shown in FIG. 1 (a), the circulation air supply port 13 and the exhaust port 14 are opened at the upper rear part of the central drying chamber 11, so that the warm air discharged to the central drying chamber 11 is quickly removed. The part passes through the circulation air supply port 13 and the circulation suction port 8 and is returned to the heating unit 2, and the rest is exhausted from the exhaust port 14 to the outside. The food 9 can be dried by releasing moisture contained in the warm air to be exhausted. In the heating unit 2, the warm air that has returned and the air that has been newly taken in from the air supply port 4 are mixed and supplied to the air supply port 7 while being heated again.
In this embodiment, the case where the mesh structure is formed on the peripheral surface of the drum 10 has been described. However, in addition to the mesh structure, a plurality of holes may be formed on the peripheral surface. That is, the mesh structure can be conceptualized as the ultimate in the case where there are a large number of holes formed in the peripheral surface, and the concept of the plurality of holes in the present application includes the mesh structure.

In the air circulation as described above, the warm air is concentrated on the food 9 accommodated in the drum 10 by the rectifying member 15. In addition, the position of the food 9 is changed by the rotation of the drum 10, and the food 9 is unraveled and separated by the lifters 27a to 27d provided therein. It has the effect of being dried uniformly.
Moreover, in the heating part 2, since the warm air which returned and the air newly taken in from the air inlet 4 are mixed, it is prevented that the temperature in the drying chamber 3 rises or falls excessively. Appropriate drying temperature is maintained during operation. On the other hand, since the amount of air supplied into the drying chamber 3 is adjusted by the closing plate provided in the air supply port 4, the temperature is suddenly increased or decreased when fully closed or fully opened. Have.
Further, impurities such as dust are removed by the dust collection filter 16 provided in the circulation air supply port 13 immediately before the warm air is supplied to the heating unit 2, so that the impurities reattach to the food 9. Is prevented, and it is possible to prevent the drum 10 and the interior of the drum dryer 1 from entering the details. Moreover, since the warm air flows from the outside to the inside and from the inside to the outside of the mesh structure, clogging due to the residue of the food 9 or the like hardly occurs.

Next, the operation of supporting the drum 10 by the bearing portions 17a and 17b will be described in detail. Since the shaft portions 20a and 20b of the flange joints 19a and 19b are pivotally supported by the bearing portions 17a and 17b, at the position X ₁ (see FIG. 3B), the through holes 24a of the flange portions 21a and 21b, respectively. When the four fastening bolts 26a to 26d are inserted into the cylindrical holes 25a to 25d of the discs 24a to 22d and the discs 22a and 22b, respectively, and tightened, the drum 10 is supported horizontally by the bearing portions 17a and 17b. Has the effect of
Further, by removing the four fastening bolts 26a to 26d, the disks 22a and 22b are separated from the flange portions 21a and 21b, and the drum 10 is supported by the slide rails 18a and 18b so as to be able to roll (position X ₂ , (Refer FIG.3 (b)).
Incidentally, when the pushing back of the drum 10 to the position _{X 1} from the position _{X 2,} in one portion in the through-hole 24a~24d and the cylindrical hole 25 a to 25 d, is inserted through the one of the tie bolts 26a~26d And temporarily tighten. Next, the drum 10 is rotated to temporarily tighten the remaining tightening bolts one after another, and then these are finally tightened so that the drum 10 is supported by the bearing portions 17a and 17b.

  Subsequently, since a total of four lifters 27a to 27d project inside the drum 10, the drum 10 is lifted every time the drum 10 rotates 90 degrees and then falls.

  As described above, according to the drum dryer 1 of the present embodiment, the warm air blown into the central drying chamber 11 immediately enters the rotating drum 10 by the rectifying member 15, so that all Can be used for drying the food 9. In addition, since the food 9 is uniformly dried by the lifters 27a to 27d, a high-quality dry food can be produced under the condition that the utilization efficiency of the hot air is good. In addition, the lifter 27a to 27d ensures that the food 9 is impacted by dropping due to the rotation of the drum 10, so that the food 9 rich in plant fibers can be made flexible in a short time. Therefore, it is particularly effective for softening wild vegetables such as springs and can improve the commercial value.

In addition, since an appropriate drying temperature is maintained in the drying chamber 3, it is possible to eliminate defective factors such as shrinkage and breakage of the food 9 due to excessive temperature rise and generation of mold due to insufficient drying. On the other hand, since the temperature can be rapidly increased or decreased by the closing plate provided in the air supply port 4, it is easy to quickly operate the temperature of the drying chamber 3 at the start or end of operation. .
In addition to maintaining the drying temperature, a part of warm air containing moisture is discharged from the central drying chamber 11 through the exhaust port 14, and then the remaining circulating hot air and air newly taken in from the air supply port 4. Are mixed and heated in the heating unit 2, the drum dryer 1 is also energy-saving and can be operated at low cost.

Subsequently, since the disks 22a and 22b are structured to freely reciprocate between the bearing portion 17a and the slide rail 18a, the drum 10 can be moved to the slide rails 18a and 18b after operation. Since an opening / closing door (not shown) is provided on the peripheral surface of the drum 10, the inside can be easily cleaned by opening the door. In addition, since the dust collection filter 16 is inserted through the side plate 3c and slidable along the cross section of the circulation air supply port 13, it can be removed and cleaned as appropriate. Possible and easy to maintain. Therefore, since the drum 10 in a clean state can always be used, the product can be manufactured in a sanitary manner. Such advantageous effects are clearly superior compared to stationary drums.
Moreover, the attachment and detachment of the drum 10 is simple because it is performed by tightening and loosening the four tightening bolts 26a to 26d. In particular, the attachment of the drum 10 to the bearing portions 17a and 17b raises the entire drum 10. Since it is not necessary, it does not become an excessive burden for individual users.

  The structure of the drum type dryer of the present invention is not limited to that shown in this embodiment. For example, the straightening member 15 may be a solid columnar shape or a flat plate shape in addition to the triangular cylindrical shape. Further, the number of lifters 27a to 27d may be other than four.

  The invention described in claims 1 to 4 can be used as a drum-type dryer for drying foods widely from home use to business use.

  DESCRIPTION OF SYMBOLS 1 ... Drum type dryer 2 ... Heating part 3 ... Drying chamber 3a ... Front door 3b, 3c ... Side plate 3d ... Rear plate 3e ... Top plate 3f ... Bottom plate 3g ... Window part 4 ... Air supply port 5 ... Heater 5a ... Chimney DESCRIPTION OF SYMBOLS 6 ... Fan 7 ... Air supply port 8 ... Circulation inlet 9 ... Food 10 ... Drum 11 ... Central drying room 11a ... Tray 11b ... Opening part 12 ... Air outlet 13 ... Circulation air supply port 14 ... Exhaust port 15 ... Rectification Member 16 ... Dust collection filter 17a, 17b ... Bearing part 18a, 18b ... Slide rail 19a, 19b ... Flange joint 20a, 20b ... Shaft part 21a, 21b ... Flange part 22a, 22b ... Disk 23 ... Drive part 23a ... Motor 23b ... Gear 23c ... Belt 24a-24d ... Through hole 25a-25d ... Cylindrical hole 26a-26d ... Tightening bolt 27a-27d ... Lifter

Claims (4)

A heating part that warms the air to warm air and a structure that is disposed adjacent to the heating part and that is cylindrical inside and has a plurality of holes in the outer peripheral surface, and contains food. A drum-type dryer for drying the food by circulating the warm air inside the drum.
The heating unit includes an air supply port that is opened on one surface and takes in air from the outside, a heater that warms the air taken in from the air supply port to warm air, and a fan that sends out the hot air An air supply port that communicates with the drying chamber and feeds the warm air into the drying chamber; and a circulation suction that communicates with the drying chamber and sucks the warm air from the drying chamber into the heating unit. With mouth,
The drying chamber is a box having a front door, and a central drying chamber that horizontally supports the drum, and the air supply port, are connected to the inside of the box and at a lower rear portion of the central drying chamber. An air outlet for opening, a circulation air supply port that communicates with the heating unit and opens in the upper rear part of the central drying chamber and circulates the warm air to the heating unit, and an upper rear part of the central drying chamber An exhaust port that opens and exhausts the warm air to the outside,
The central drying chamber includes bearing portions on both side surfaces, slide rails installed horizontally below the bearing portions, and flange joints pivotally supported by the bearing portions and disposed above the slide rails. , And
A drum-type dryer, wherein the drum is disposed so as to be rotatable on a horizontal axis, and provided with discs that can be attached to and detached from the flange joints and that can roll on the slide rail on both left and right end surfaces. The front door is provided with a long straightening member on the inner surface along a direction parallel to the horizontal rotation axis of the drum,
The rectifying member protrudes to a position close to the outer peripheral surface of the drum below the rotating shaft of the drum, and is configured to allow the warm air blown from the blowout port to flow inside the drum. 2. The drum dryer according to claim 1, wherein The drum is provided with a lifter having a plate shape along a direction parallel to the rotation axis on an inner peripheral surface thereof,
The drum type dryer according to claim 1 or 2, wherein the lifters are arranged in parallel along the inner peripheral surface of the drum at a predetermined interval and project in the direction of the rotating shaft. In the box, a dust collection filter is inserted through an opening formed in the vicinity of the circulation air supply port,
The drum type dryer according to any one of claims 1 to 3, wherein the dust collection filter is configured to be slidable along a cross section of the circulation air supply port.

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