JPH0914838A - Drying device - Google Patents

Abstract

PURPOSE: To perform an efficient heating/drying by providing a stirring means which stirs an article to be dried, a stirring means with a blade which turns around a shaft to the central direction of a drying container, and a stirring means with a blade which is fixed in the direction from the center of the drying container to a side wall, in the drying container. CONSTITUTION: A fixed chopper 85 is attached to an end plate 59 of a drying container 201, and the lower blade of the chopper 85 is made to position radially from the center of the drying container 201. A rotating chopper 89 is a body part 55 of the drying container 201, and is attached on the top of the turning surface of a stirring arm 71. A stirring device is constituted of a scraper 73 being fixed at a lower part of the stirring arm 71 which is radially arranged with a rotating shaft 67 as the center, and fixed to the rotating shaft 67, and a blade facing up, which is attached to the upper surface of each end of the stirring arm 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying device, and more particularly, to a vacuum drying device for accommodating and heating an object to be dried such as kitchen waste and evaporating the moisture to dry the object.

[0002]

2. Description of the Related Art A drying container containing an object to be dried such as kitchen waste is decompressed to a vacuum to lower the boiling point, and a heat pump is used to heat the drying container to evaporate water from the object to be dried. There is known a vacuum dryer that returns the evaporated water to water condensed by cold heat generated by a heat pump and discharges the water to the outside of the apparatus.

FIG. 16 is a diagram showing a schematic configuration of such a vacuum drying apparatus. Referring to the drawings, the vacuum drying apparatus is generally a closed container-shaped drying container 201 in which an object to be dried such as kitchen waste is housed, and a steam discharge pipe 11 in the drying container 201.
Via a condenser 203, a cooling / heating device 205 including a heat pump chiller unit, a vacuum pump for bringing the inside of the drying container 201 into a vacuum state via the condenser 203 and the steam discharge pipe 11. And 33. In addition, a stirring drive unit 69 is provided at the bottom of the drying container 201.
A stirring arm and a scraper (not shown) connected to the are attached.

The cold / hot heat generator 205 is composed of a condenser unit 21, an expansion valve 23, and an evaporation unit 25 around the compressor 19, and a refrigerant pipe 301a in which a refrigerant such as CFC is enclosed. ˜301d are connected to each other. An outgoing cold water pipe 207a is connected to the outlet of the evaporation unit 25 and the inlet of the condenser 203, a return cold water pipe 207b is connected to the inlet of the evaporation unit 25 and the outlet of the condenser 203, and a return cold water pipe 207b is connected to the return cold water pipe 207b. A pump 27 is installed, an expansion tank 13 is attached upstream of the pump 27, and a water flow switch 28 is attached downstream thereof.

On the other hand, the outgoing hot water pipe 209a is connected to the outlet of the condensing unit 21 and the inlet of the drying container 201, and the returning hot water pipe 209b is connected to the inlet of the condensing unit 21 and the outlet of the drying container 201. . Return hot water pipe 209
An expansion tank 15 is installed in b, and a water flow switch 303 and a fan cooling unit 17 are installed on the downstream side thereof. In addition, a pump 31 is provided below the condenser 203.
Is attached, and a solenoid valve 37 that opens and closes in conjunction with a water level detector 39 provided in the condenser 203 is attached downstream thereof. Further, the vacuum pump 33 is connected to the condenser 203 by an exhaust pipe 36 via a check valve 34, and an exhaust vent 35 is provided on the downstream side thereof.

FIG. 17 is a schematic sectional view showing the internal structure of the drying container 201 in FIG. Referring to the drawing, the drying container 201 includes a cylindrical body 55, a bottom 57 connected to the bottom edge of the body 55, and a mirror 59 connected to the upper edge of the body 55. The lower part of the bottom portion 57 is a baffle type hot water heat exchanger 77. The hot water heat exchanger 77 has a return hot water pipe connecting portion 75a connected to the return hot water pipe 209a and a return hot water pipe 209b. The hot water pipe connecting portion 75b is attached. The body portion 55 is provided with a discharge port 65 for taking out the dried material to be dried, and the mirror portion 59 is provided with an input port 61 for feeding the material to be dried.
And a steam pipe connecting portion 63 connected to the steam discharge pipe 11 are attached. As a stirring device for the material to be dried, the bottom 57
A plurality of stirring arms 71 are attached to a rotating shaft 67 that penetrates through the central portion of the stirring shaft and is connected to a stirring drive unit 69, and scrapers 73 are attached to the respective ends of the stirring arms 71.

The operation of this conventional vacuum drying container will be briefly described below. When the material to be dried is housed in the drying container 201 and the drying process is started, the vacuum pump 33 is turned on, and the air containing the steam inside the drying container 201 is discharged through the steam discharge pipe 11 and the condenser 203. . As a result, the inside of the drying container 201 has a negative pressure, its boiling point is lowered, and water from the material to be dried is easily evaporated.
When the operation is started, the stirring arm 71 mounted in the drying container is rotated by the stirring drive unit 69 to stir the material to be dried and promote the generation of water vapor.

On the other hand, in the cold heat generator 205, the compressor 1
9 starts to operate, and in the evaporation unit 25, the pump 27 is operated by each process of compression, condensation, expansion, and evaporation of the refrigerant.
The forward cold water pipe 207a and the return cold water pipe 2
Cold water is provided to the water circulating through 07b. This cold heat cools the steam flowing from the drying container 201 through the steam discharge pipe 11 in the condenser 203 and condenses therein. When the water level detector 39 detects a predetermined water level, the condensed water is discharged outside the apparatus by driving the pump 31 for a predetermined time by opening the electromagnetic valve 37.
Further, in the condensing unit 21, the heat of the water circulating through the forward hot water pipe 209a and the return hot water pipe 209b is given by the operation of the pump 29. This warm heat heats the material to be dried in the drying container 201 and promotes evaporation of water. In this way, the conventional vacuum drying apparatus heat-drys the material to be dried such as kitchen waste to remove the water content.

[0009]

In the conventional vacuum drying apparatus as described above, when the operating time elapses, the amount of steam generated in the drying container rapidly decreases due to the change in the dry state of the material to be dried. Therefore, there is a problem that an efficient drying process cannot be performed sufficiently. FIG. 18 is a diagram showing a time change of the evaporation amount of water from the material to be dried contained in the drying container 201, that is, the drainage amount of the condensed water discharged by the pump 31, in the apparatus of FIG.

Referring to the figure, even if the operation of the vacuum drying device is started, evaporation does not occur immediately, and during the time T, it is supplied through the hot water pipes 209a and 209b. The heat is used to raise the temperature of the material to be dried. Then, when the temperature of the material to be dried gradually rises, evaporation starts as shown by the solid line. Then, the amount of drainage increases rapidly until time T _1, but after that time, the amount of drainage begins to decrease due to the reduction of the water content of the material to be dried. The reason why this change in the amount of drainage occurs will be described below.

[0011] The substance to be dried is mixed with the heated solids from different solids (there is a state where there is a gap between the solids and the steam easily escapes), gelatinization (paste state in which the moisture of the dried substance is reduced), curing ( Further, water is depleted, embrittlement (almost water is removed), agglomerates (solidified to some extent and separated), and proceed to each state of granular powder to be dried. Specifically speaking in FIG. 16,
At the stage of approaching the time T ₁ , the mixture progresses from the mixing to the gelatinization state, and the evaporation of water from the material to be dried gradually decreases. Then, it progresses to the brittle state of hardening from time T ₁ to time T ₂ . That is, when the material to be dried enters the cured state, its water content is sealed in the material to be dried, and the evaporation amount of the water is extremely reduced regardless of the amount of the water content. If it is not in such a sealed state, it is considered that the evaporation amount of water gradually decreases as shown by the broken line in FIG. 16, but due to this sealing phenomenon, it sharply decreases as shown by the solid line. Therefore, as a whole, it takes time to change from the cured state to the lumped state, and as a result, it takes time to evaporate the material to be dried.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a drying device which enables efficient heating and drying.

[0013]

A drying device according to the invention of claim 1 is a drying device, which is connected to a drying container for containing an object to be dried such as kitchen waste and is discharged from the drying container. A condenser that cools the steam and discharges it as condensed water and an arm that is installed in the drying container and that rotates around the center of the bottom of the drying container stir the stored material in a predetermined direction. A second stirring means installed in the side wall of the drying container above the rotation surface of the arm and having a blade that rotates around an axis toward the center of the drying container; The third stirring means is provided in the drying container, and has a blade fixed above the rotation surface of the arm in the direction from the center of the drying container to the side wall thereof.

A drying apparatus according to a second aspect of the present invention is the drying apparatus according to the first aspect, wherein the third stirring means is further fixed above the blade and in a direction substantially perpendicular to the direction. It has two blades.

[0015]

In the invention according to claim 1, the material to be dried is stirred by the synergistic effect of the first stirring means, the second stirring means and the third stirring means. According to a second aspect of the invention, in addition to the function of the first aspect of the invention, the third agitating means is further fixed above the blade and is fixed in a direction substantially perpendicular to the direction. It has a blade.

[0016]

As described above, in the invention according to claim 1, the material to be dried is stirred by the synergistic effect of the first stirring means, the second stirring means and the third stirring means. The stirring efficiency is improved regardless of the change in the dry state of the product. As described above, the invention according to claim 2
In addition to the effect of the invention of claim 1, the third stirring means further has a second blade fixed above the blade and in a direction substantially perpendicular to the direction, so that the material to be dried is The upper layer flow can be forcibly separated and the stirring efficiency can be further improved.

[0017]

1 is a diagram showing the construction of a vacuum drying apparatus according to a first embodiment of the present invention. The configuration will be described with reference to the drawings. Here, the difference from the conventional vacuum drying apparatus shown in FIG. 16 will be mainly described.

Referring to the figure, the water level detection signal of the water level detector 39 attached to the condenser 203 is input to the control device 101, and the control device 101 outputs the water level detector 39 based on the signal from the water level detector 39. The stirring drive unit 69 installed at the bottom of the control unit is controlled. Specifically, the control device 101 detects the output interval of the water level detection signal from the water level detector 39. Thus, the change in the amount of water vapor generated from the material to be dried contained in the drying container 201 is detected. That is, when the condensed water in the condenser 203 reaches a predetermined amount, the water level detector 39 outputs a signal and the solenoid valve 37 is "opened", while the control device 101 controls the pump 3 based on the signal.
1 is operated for a certain period of time to discharge the condensed water. Since the discharge amount of the condensed water by one operation of the pump 31 is constant due to the capacity of the pump, the control device 101 detects a change in the operation interval of the condensed water, that is, the drying container 201. It is possible to detect a change in the amount of water vapor generated from the. When this output interval exceeds a predetermined time, that is, when the amount of water vapor generated decreases by a predetermined amount or more, it is determined that the dried state of the material to be dried is a hardened state or a brittle state, and stirring drive is performed. A control signal is transmitted to the unit 69 to reverse the rotation direction of the drive shaft. As a result, the stirring direction of the material to be dried in the drying container 201 is reversed to promote the evaporation of the moisture of the material to be dried in the sealed state.

FIG. 2 shows the drying container 20 shown in FIG.
FIG. 3 is a schematic cross-sectional view showing the internal structure of FIG. 1, and FIG. 3 is a view of the fixed chopper 85 as the third stirring means and the rotary chopper 89 as the second stirring means of FIG.
4 is a perspective view showing a specific structure of the fixed chopper 85 of FIG. 2, and FIG. 5 is a view showing a specific structure of the inside of the drying container 201 of the rotary chopper 89 of FIG. 1) is a side view of the rotary chopper 89, (2) is a view of the rotary chopper 89 seen from the central portion side of the drying container 201, and FIG. 6 is a view of the stirring arm 71 of FIG. 2 seen from above. Is.

Differences from the conventional example shown in FIG. 17 will be mainly described with reference to these drawings. The fixed chopper 85 is attached to the mirror portion 59 of the drying container 201 via the support member 87. The fixed chopper 85 is composed of a column 95 made of a cylindrical material, an upper blade 97 attached to the center of the column 95, and a pair of lower blade 99a and lower blade 99b attached to the lower end of the column 95. To be done. Lower blade 9 of fixed chopper 85
The lower blade 99b and the lower blade 99b are opposed to each other via the column 95, and the direction thereof is as shown in FIG.
Radial from the center of 01. Also, the column 95
The upper blade 97 is attached in a direction substantially perpendicular to the attaching direction of the lower blade 99a and the lower blade 99b.

On the other hand, the rotary chopper 89 is used for the drying container 20.
The first body portion 55 is attached above the rotating surface of the stirring arm 71 as the first stirring means, and is driven via the drive belt 93 by the rotation driving portion 91 installed outside the body portion 55. It The rotary chopper 89 has a drive belt 93.
The rotary shaft 52 driven via the rotary shaft 52, the outer blade 54 mounted on the tip of the rotary shaft 52, and the three rotary shafts 52 mounted on the rotary shaft 52 between the outer blade 54 and the body portion 55 side of the drying container 201. It is composed of inner blades 56a to 56c. In addition, the inner blade 56a-
A blade portion 64 is formed at each end of the inner blade 56c to contribute to the cutting of the dried object.

Not only the scraper 73 is provided on the lower surface of the stirring arm 71, but also the central scraper 10 is provided at the center thereof.
9 is fixed. The purpose and effect of this central scraper will be described later. FIG. 6 shows the stirring arm 71 of FIG.
It is the figure which looked at scraper 73 from the upper part.

Referring to the figure, the stirring device includes four stirring arms 71a to 71d radially arranged around the rotation shaft 67 and fixed to the rotation shaft 67, and stirring arms 71a to 71d. The scraper 73a to the scraper 73d fixed to the lower part of each of the above, and the upward blade 58a to the upward blade 58b attached to the upper surface of each end of the stirring arm 73a to the stirring arm 73d. As described above, each of the stirring arms 71a and 71c has a central scraper 1 parallel to the arm at the center thereof.
09a and 109b are fixed. This scraper is provided in order to prevent the material to be dried from being forcedly pushed into the rotating shaft 67 side. The parallel to the stirring arm is that the material to be dried when the stirring arm is operated normally and reversely is used. This is in consideration of the movement of.

The bottom portion 57 of the drying container 201 has a first area 79 in which the pasty component of the material to be dried is scraped off by the scrapers 73a and 73c, a second area 81 in which the stirring arm 71d scrapes it, and a scraper 73b.
It is divided into a third region 83 which is scraped off by the drying container 201 by driving the scraper in this way.
All its upper surfaces of the bottom 57 of the are covered by any scraper for scraping.

In addition, scrapers 73a to 73d
Are not parallel to the axial directions of the stirring arms 71a to 71d, and are attached at an angle as shown. In the normal operation, the rotary shaft 67 rotates in the clockwise direction in the drawing.
With the rotation of 1a to the stirring arm 71d, the stirring arm 71d is pushed in the direction of the body 55. Therefore, the drying container 201
The material to be dried deposited on the bottom portion of the is pushed up along the body portion 55 and is agitated with the material to be dried deposited on the upper portion to accelerate evaporation of water.

Scrapers 73a to 73d
The angle of attachment to each of the stirring arms 71a to 71d may be appropriately changed according to the type of kitchen waste to be dried, the state of holding water, and the like. Further, in FIG. 3, the mounting angle of the scraper 73b on the stirring arm 71b and the mounting angle of the scraper 73d on the stirring arm 71d are different because the mounting distances from the respective rotating shafts 67 are different. This is to make the load on the stirring arm 71b and the stirring arm 71d as uniform as possible and improve the durability of the stirring arm.

Further, as shown in FIG.
3 (109) has a shape in which the hatched portion is cut as the deletion portion 107, but this is for the following reason.
That is, when the material to be dried is a processed material such as cooked rice whose hardness and tenacity at the time of curing become extremely large, the scraper 73 pushes the material to be dried to the outer periphery, so that the material between the side wall and the scraper is extremely There is a possibility that a large resistance will be generated, and an excessive load may be applied to the stirring arm and the stirring drive section. For this reason, the removal portion 107 is provided with a space for allowing the material to be dried to escape, thereby reducing the resistance force. The reason why the central scraper 109 is also provided with the deletion portion 107 is that it is necessary to prevent the material to be dried from being pushed between the central scraper 109 and the rotary shaft 67.

FIG. 7 is a view showing a state in which the rotary shaft 67 rotates in FIG. 6 and the stirring arm 71a approaches the rotary chopper 89, and FIG. 8 shows "X"-"in FIG.
Fig. 6 is a view as seen from line "X".
The rotating chopper 89 includes stirring arms 71a to 7a.
The body 55 at a position separated by a predetermined distance from the rotation surface of 1d.
Mounted on the surface of. Then, as shown in FIG. 8, the rotating direction of the arrow of the stirring arm 71a (the drying container 201
The rotation chopper 89 with respect to the bottom 57 of the outer cutter 54 rotates in the direction of the arrow from the center of the drying container 201 to the body 55 around the rotation shaft 52, that is, in the clockwise direction (clockwise direction). And the inner blades 56a to 56c rotate. As a result, by the rotation of the stirring arm 71a,
The kitchen garbage that was pushed toward the rotating chopper 89
Not only the B "direction but also the" A "direction above the rotary chopper 89 is pushed up and shear-separated, so-called undercutting. This causes the material to be dried to proceed to the hardening phenomenon and form a large lump. When the amount of evaporation of the water decreases, the shredding effect of crushing the lumps is exerted, and the lumps are subdivided to promote the granulation.

As shown in FIG. 18, the time T
_{When 1} is exceeded, the amount of drainage of condensed water is drastically reduced due to the hardening phenomenon of the material to be dried, and the interval of drainage due to the operation of the pump 31 is lengthened. Then, when the control device 101 detects that the interval has exceeded the predetermined time, the control device 101 instructs the stirring drive unit 69 and the rotation drive unit 91 to reverse the rotation directions of their drive shafts. Is output. When this signal is received, the stirring drive unit 69 reverses the rotation shaft 67 of the stirring arm and the rotation drive unit 91 reverses the rotation shaft 52 of the rotation chopper 89, so that the stirring arms 71a to 71d are reversed. The outer blade 54 and the inner blades 56a to 56c are rotated counterclockwise (counterclockwise) in FIG. It should be noted that this reverse operation may be performed, for example, for 1 to 2 minutes per hour. The forward / reverse operation may be controlled such that the normal operation and the reverse operation are alternately performed for the same time. By this reverse rotation operation, the cured state of the material to be dried is unraveled, and the release of water vapor in the sealed state is promoted. As a result, the drainage amount of the condensed water in the condenser 203 in FIG. 6 approaches the ideal state from the solid line to the broken line from time T ₁ to T ₂ , and the efficiency of the discharge process is improved. When the rotation chopper 89 rotates mainly for the rotation of the stirring arms 71a to 71d, the undercut effect of the material to be dried is further enhanced.

FIG. 9 shows the stirring arm 71 shown in FIG.
Upward blades 58a-5 provided on each of a-71d
FIG. 8 is a diagram showing a positional relationship between 8d and a rotary chopper 89. Referring to the figure, in the case where the material to be dried is cooked rice or the like, the adhesive strength thereof greatly increases as the curing of the processed material progresses due to drying, and the body 55 of the drying container 201 and the rotary chopper 8 are shown.
9, the rotating shaft 52 of the rotary chopper 89, the outer blade 54 and the inner blades 56a to 56c are entangled with the cured material to be dried,
It becomes a wound deposit 68. This wrapped deposit 68 increases the torque required to rotate the rotary chopper 89 and reduces its chopper effect. The phenomenon that the material to be dried winds up continues until the material to be dried progresses from the cured state to the brittle state. In order to remove this wrapping deposit 68 phenomenon, each of the stirring arms 71a to 71d is provided with upward blades 58a to 58d. That is, the positional relationship between the upward blade 58 and the outer blade 54 and the inner blade 56 of the rotary chopper 89 is as shown in FIG. 8, and each time the stirring arms 71 a to 71 d pass below the rotary chopper 89. The upward blade 58 removes the material to be dried entwined with the rotary chopper 89.

The upward blade 58a fixed to the stirring arm 71a is generated by the rotation of the stirring arm 71a.
66 a of the rotary chopper 89 passes between the inner blade 56 b and the inner blade 56 sheet. Similarly, the upward blade 58
The locus 66b of b is between the inner blade 56b and the inner blade 56a,
The locus 66c of the upward blade 58c is the body portion 55 and the inner blade 56c.
, And the locus 66d of the upward blade 58d is the inner blade 56a.
And the outer blade 54, respectively. In this way, each time the rotary shaft of the stirring arm makes one rotation, the material to be dried entangled in each part of the rotary chopper is moved upward by the blades 58a to 58a.
Will be removed by each of the 8d. It should be noted that each of the upward blades 58a to 58d is attached to each stirring arm because when all the upward blades are attached to one stirring arm, a rotary chopper (usually 400R.
This is because the external force applied to the high-speed rotation (about PM) becomes large, which is not preferable. Therefore, an upward blade is provided on each stirring arm to disperse the external force applied to the rotary chopper. Therefore, in consideration of the case where the number of stirring arms is two, as described later, it is preferable that the number of upward blades is two at maximum for each stirring arm.

FIG. 11 is a view showing the structure and arrangement of a fixed chopper 85 and a rotary chopper 89 according to the second embodiment of the present invention, which corresponds to FIG. 2 according to the first embodiment. FIG. 12 shows the fixed chopper 85 of FIG.
It is a perspective view which shows the concrete structure of a and the fixed chopper 85b, and FIG. 13 is a figure which shows the concrete structure of the rotary chopper 89 of FIG.

With reference to these figures, the fixed chopper 8
5a has an upper blade 97 attached to substantially the center of a column 95 and a lower blade 99 attached to the lower end thereof. The fixed chopper 85b has a pair of lower blades 99a and 99b attached to the lower end of the column 95. The fixed chopper 85a is attached at a direction of 30 ° with respect to the direction "CO" perpendicular to the "EO" direction where the rotary chopper 89 is attached, and the fixed chopper 85b is attached to the "OD". Thirty
It is installed in the direction of °. The rotary chopper 89
Is different from that of the first embodiment only in the shape of the outer blade 54, and the other structures are the same.
By configuring the fixed chopper 85 and the rotary chopper 89 in this way, the upper blade 97 of the fixed chopper 85a directs the flow of the material to be dried, which is pushed by the rotation of the stirring arm, to the center side and the side wall side of the drying container 201. Separate and enhance the mixing effect. Lower blade 99 of fixed chopper 85a and lower blade 9 of fixed chopper 85b
9b promotes crushing and re-adhesion of the material to be dried with the body 55 of the drying container 201. The lower blade 99a and the lower blade 99b of the fixed chopper 85b work together with the stirring arm to accelerate shearing and readhesion of the material to be dried, accelerate the transition from curing to embrittlement, and heat and dry the material to be dried as a whole. Contribute to the promotion of. The rotary chopper 89, the fixed chopper 85a, and the fixed chopper 85b are installed at equal intervals in the peripheral direction of the drying container 201. The positional relationship between them is that the drying container 201 is to be dried. It may be adjusted according to the type of material and the amount of water retained.

FIG. 14 is a view of the structure of the stirring arm in the drying container 201 according to the third embodiment of the present invention as viewed from above. Referring to the drawing, three stirring arms 71a to 71c are arranged radially from the rotating shaft 67 at equal intervals.
The scrapers 73a to 73c are attached to the lower surfaces of the end portions of the stirring arms 71a to 71c at a predetermined angle with respect to the axial direction of the stirring arms 71a to 71c. Also, the stirring arms 71a to 71
The upward blade 58a to the upward blade 5 are provided on the upper surface of each end of c.
8c is attached, and serves to remove the material to be dried entangled in the rotary chopper as described above. Dry container 2
The bottom 57 of 01 has a first area 79 in which the pasty component of the material to be dried is scraped by the scraper 73a, a second area 81 in which the scraper 73b is scraped, and a third area 83 in which the scraper 73c is scraped. It is divided so that all of its upper surface is scraped by one of the scrapers. The stirring arm 71c
The mounting angle of the scraper 73c with respect to the axial direction is smaller than the mounting angles of the other scrapers because its position is the closest to the rotating shaft 67, so that the load from the material to be dried applied to each stirring arm is substantially constant. is there.

FIG. 15 is a view of the structure of the stirring arm in the drying container 201 according to the third embodiment of the present invention as viewed from above. Referring to the drawing, two stirring arms 71a and 71b are provided facing the rotating shaft 67, and the lower surface of each end of the stirring arm 71a and the stirring arm 71b is arranged in the axial direction thereof. On the other hand, the scraper 73a and the scraper 73b are attached in a state of being inclined at a predetermined angle. Also, the stirring arm 71a and the stirring arm 71
An upward blade 58a and an upward blade 58b are attached to the upper surface of each end of the rotary chopper 8b as described above.
It plays the role of removing the dried material entangled in 9.
The bottom surface of the drying container 201 has a scraper 73a and a scraper 73c of the stirring arm 71a and the stirring arm 71b.
The entire surface is to be scraped by the first region 79 and the second region 81 corresponding to each of the above.

In each of the above embodiments, the present invention is applied to the vacuum drying apparatus, but the idea of the present invention can be similarly applied to a drying apparatus that performs drying without using a vacuum pump. Needless to say.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a vacuum drying apparatus according to a first embodiment of the present invention.

2 is a diagram showing a schematic structure inside a drying container 201 shown in FIG. 1. FIG.

FIG. 3 is a view showing a structure of the fixed chopper and the rotating chopper shown in FIG. 2 as seen from the upper surface thereof.

FIG. 4 is a perspective view showing a specific structure of the fixed chopper of FIG.

5 is a diagram showing a specific structure of the rotary chopper of FIG.

FIG. 6 is a view showing a structure of the stirring arm shown in FIG. 2 as seen from the upper surface thereof.

FIG. 7 is a view showing a state in which the stirring arm shown in FIG. 2 is close to the rotary chopper.

FIG. 8 is a view as seen from the “X”-“X” line in FIG. 7, showing a state in which the stirring arm has come directly under the rotary chopper.

9 is a diagram showing a positional relationship between the upward blade of the stirring arm and the blade of the rotary chopper shown in FIG.

FIG. 10 is a view showing a side surface shape of the scraper of the stirring arm shown in FIG.

FIG. 11 is a view showing a structure of a fixed chopper and a rotary chopper according to a second embodiment of the present invention as viewed from above.

12 is a perspective view showing the structure of the fixed chopper of FIG.

13 is a diagram showing a specific structure of the rotary chopper shown in FIG.

FIG. 14 is a view showing a structure of a stirring arm according to a third embodiment of the present invention as seen from the upper surface thereof.

FIG. 15 is a view showing a structure of a stirring arm according to a fourth embodiment of the present invention as seen from the upper surface thereof.

FIG. 16 is a diagram showing a configuration of a conventional vacuum drying device.

17 is a diagram showing an internal structure of a drying container of the vacuum drying apparatus of FIG.

FIG. 18 is a diagram showing changes in the evaporation amount of water from the material to be dried in the conventional vacuum drying apparatus.

[Explanation of reference numerals] 52 rotary shaft 54 outer blade 56 inner blade 71 stirring arm 85 fixed chopper 89 rotary chopper 91 rotary drive unit 93 drive belt 97 upper blade 99 lower blade 201 drying container 203 condenser condenser Indicates the same or corresponding part.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F26B 25/04 B09B 5/00 ZABP

Claims (2)

[Claims] 1. A drying apparatus, comprising: a drying container for containing an object to be dried such as kitchen waste; and a condenser connected to the drying container for cooling vapor discharged from the drying container and discharging the condensed water as condensed water. A first agitating means for agitating the object to be dried housed in a predetermined direction by an arm installed in the drying container and rotating about the center of the bottom of the drying container; Second stirring means having a blade that is installed above the surface and inside the side wall of the drying container, and that rotates around an axis toward the center of the drying container; and is installed in the drying container. A drying device, comprising: a third stirring means having a blade fixed in a direction from a center of the drying container to a side wall of the drying container at a position above a rotation surface of the arm. 2. The drying device according to claim 1, wherein the third stirring means further includes a second blade fixed above the blade and in a direction substantially perpendicular to the direction.