JP3106692B2 - Drying processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for treating objects to be dried such as foods, industrial materials, garbage and industrial waste.

[0002]

2. Description of the Related Art Drying apparatuses include a system using an electric heater, a system using combustion heat, and a system using microwaves, depending on a heating source. Although a drying treatment apparatus using an electric heater is excellent in safety and controllability, heat loss is large, and it is difficult to increase drying efficiency. Since the drying treatment apparatus using combustion heat uses gas fuel, liquid fuel, or the like, the entire apparatus becomes complicated and large, and there is a problem in safety. On the other hand, a drying treatment apparatus using microwaves has a high drying efficiency because the microwaves are selectively absorbed by the moisture in the material to be dried, and the entire apparatus is not complicated and large, and the moisture content is low. It is suitable for the drying process of a high drying object.

[0003]

However, such a conventional drying apparatus using microwaves also has the following problems.

For example, since the intensity distribution of microwaves tends to be non-uniform, it is difficult to uniformly dry the object to be dried, and the object to be dried in the lower portion is often wet even near the end of drying. In particular, when the material to be dried is garbage, the broth remains at the bottom, which is unsanitary. In addition, water vapor generated from the material to be dried may condense after being discharged, thereby contaminating the interior and exterior. If the object to be dried is continuously irradiated even after drying with microwaves, there is a risk that the object to be dried is ignited. The present invention uses a microwave and an electric heater in combination to enhance the condensation performance of water vapor generated from the material to be dried and the uniformity of the drying process,
It is an object of the present invention to provide a drying treatment apparatus which enhances drying efficiency and prevents ignition of a material to be dried.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a container for storing an object to be dried, a condenser, a lid for the condenser, and a microwave oscillator for heating the object to be dried. And a blower fan for cooling the outer surface of the condensing section, and a drying processing apparatus provided with a heater below the container to be dried.

Further, a cylindrical heat insulating container is located outside the container for storing the object to be dried, and means for rotating the container for storing the object to be dried is provided in an inclined state. It is made of a wave transmitting material, and has a configuration in which the microwave introduction port is located at the bottom of the condensing section.

In addition, the operation of the microwave oscillator is stopped near the end of the processing, and only the heater is operated.

[0008]

According to the above construction, when the object to be dried is put into the container to be dried and the microwave oscillator is operated, the microwave starts to heat the object to be dried in the container to be dried. In particular, the microwaves are selectively absorbed by the moisture in the object to be dried, generating water vapor, and the object to be dried dries.
In addition, by operating the blower fan together with the microwave oscillator, the outer surface of the condenser is air-cooled, and most of the water vapor generated from the material to be dried is condensed on the inner surface of the condenser to form condensed water. To the outside of the Further, the heater is operated together with the microwave oscillator and the blower fan. It is difficult to heat an object to be dried located in the vicinity of the microwave reflecting material by using only the microwave, but uniform drying can be promoted by using the heater in combination.

Further, by arranging the cylindrical heat insulating container outside the container for storing the object to be dried, heat radiation from the object to be dried is suppressed, and high efficiency is achieved. The object to be dried is rotated while being tilted, and microwaves are irradiated from the bottom of the condenser to stir the object to be dried and to uniformly dry the object to be dried. The condensing performance of water vapor generated from the material to be dried is improved. By stirring the object to be dried, the volume of the object to be dried can be reduced.

In addition, the operation of the microwave oscillator is stopped near the end of the process, and only the heater is operated, so that ignition of the object to be dried is accurately prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific description will be given below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. In FIG. 1, a cylindrical heat insulating container 3 is located outside a container 1 for storing a material 1 to be dried.
The condensing part 4 is provided outside of. The container 2 to be dried is made of a microwave transmitting material having excellent heat resistance. As the cylindrical heat insulating container 3, a metal (microwave reflecting material) container whose inside was depressurized was used. A condenser lid 5 is provided above the condenser 4, and the condenser 4 and condenser lid 5 are formed of a microwave reflecting material. The condenser lid 5 is hinged to
It can be opened and closed. Water vapor 7 generated from the material 1 to be dried
The lid 5 is provided with a lid packing 8 so as not to leak. A temperature detector 9 is installed diagonally above the condenser lid 5 so as to detect the temperature of the steam 7. A heat insulating material 10 is provided below the condenser lid 5. The microwave inlet 11 is located at the bottom of the condenser 4, and the microwave inlet 11 is connected to the waveguide 12 and the microwave oscillator 13. A blower fan 14 for air-cooling the outer surface of the condenser 4 is attached to the condenser 4 by a blower fan support 15. In this embodiment, the object-to-be-dried storage container 2 is inclined by about 45 degrees from horizontal, but the inclination angle is arbitrary. A connection portion 17 detachable from the rotating shaft 16 is provided at a lower portion of the container 2 to be dried, and a motor 18 for rotating the rotating shaft 16 is provided. A motor shaft 19 of the motor 18 is connected to the rotating shaft 16 by a connection bearing 20. The motor 18 is attached to the bottom of the condenser 4 by a motor support 21. An O-ring 2 is provided between the rotating shaft 16 and the rotating bearing 23 so that the condensed water 22 does not leak to the motor 18 side.
4 are provided. A support 25 is installed to support the rotating shaft 16 of the cylindrical heat insulating container 34, and a support packing 26 and a support sheet 27 are provided between the cylindrical heat insulating container 3 and the support 25. The support 25 is made of a microwave transmitting material. A heater 28 is provided between the support 25 and the simple object storage container 2. The heater 28 penetrates the support 25 and is attached to the bottom of the condenser 4. Heater 28
A heater heat shield plate 29 is provided between the heater and the support 25. A heater temperature detector 30 is provided to detect a gas temperature near the heater 28. As a rotation assisting tool, an upper end portion of the drying object storage container 2 is provided so that the drying object storage container 2 can rotate while being in contact with the inner surface of the cylindrical heat insulating container 3.
A roller 31 is provided. An inner container ring 32 is also provided on the upper part of the storage container 2 so as to reduce the inner diameter of the storage container 2. A condensed water outflow portion 33 is provided below the condensing portion 4, and gas (including odor) generated from the dried matter 1 is sucked from a part of the condensed water outflow portion 33 by an intake fan 34, and the gas is discharged. A catalyst device 36 is provided in a gas suction pipe 35 to be sucked. Condensate outflow section 3
3, a condensed water discharge passage 37 is provided.

Next, the operation will be described. In FIG. 1, after the object 1 to be dried is put into the container 2 to be dried, the condenser lid 5 is closed. When the microwave oscillator 13 is operated, the microwave passes through the waveguide 12 and passes through the condenser 4.
Irradiated into the condenser 4 from the microwave inlet 11 provided on the bottom surface of the condenser. The microwaves radiated into the condensing unit 4 pass through the support 25 formed of the microwave transmitting material and the container 2 to be dried, and start heating the object 1 to be dried. In particular, the microwaves are selectively absorbed by the moisture in the object 1 to be dried,
The water vapor 7 is generated, and the object 1 is dried. Since the microwave is irradiated from the lower part of the object 1 to be dried, even if the object 1 is garbage, no boiling liquid remains at the lower part, which is sanitary. By locating the microwave inlet 11 at the bottom of the condenser 4, the device can be easily made compact, and leakage of the microwave from the condenser lid 5 can be easily prevented. In addition, the blower fan 14 is operated together with the microwave oscillator 13 to cool the outer surface of the condensing section 4 with air. By cooling the outer surface of the condensing section 4 with air, water vapor 7
Most of the water is condensed on the inner surface of the condensing section 4 to form condensed water 22, which is discharged from a condensed water outflow section 33 below the condensing section 4. The condensed water outflow portion 33 does not discharge solids that may cause clogging in the sewer route, so that the environment is not adversely affected. Further, a microwave oscillator 13 and a blowing fan 14
At the same time, the heater 28 is operated. The temperature of the heater 28 is controlled by a heater temperature detector 30. Dry matter 1 near microwave reflecting material by microwave
Is difficult to heat, but by using the heater 28 together,
Uniform drying can be promoted. The microwave dries the object 1 from the inside, and the heater 28
Has the property of drying from the outside, and if microwaves and the heater 28 are used together, efficient drying can be performed. The output of the heater 28 is easy, the safety is high, and the operability is excellent. The motor 18 is also operated together with the microwave oscillator 13, the blower fan 14, and the heater 28, and the object-to-be-dried 2 is rotated in an inclined state. By rotating the object-to-be-dried storage container 2 in an inclined state, the object to be dried 1 is agitated, the object to be dried 1 is uniformly dried, and water vapor 7 generated from the object to be dried 1 is promoted to promote heat transfer. Can also enhance the condensation performance. By stirring the object 1 to be dried, the volume of the object 1 to be dried can be reduced. The gas (including the odor) generated from the material to be dried 1 passes through the catalyst device 36 to remove the odor, and then is discharged downstream of the intake fan 34.

By disposing the cylindrical heat transfer container 3 outside the container 2 to be dried, heat radiation from the object 1 to be dried can be suppressed and high efficiency can be achieved. Generally, if the air cooling of the outer surface of the condenser 4 is strengthened in order to enhance the condensation performance, the heat radiation loss from the object to be dried 1 tends to increase. However, the installation of the cylindrical heat insulating container 3 achieves both improvement of the condensation performance and higher efficiency. It is possible to do. The heat of the heater 28 is hardly radiated, and is effectively used for drying the object 1 to be dried. By rotating the object-to-be-dried container 2 in an inclined state and irradiating microwaves from the bottom part of the condensing part 4, the object to be dried 1 is stirred, and the object to be dried 1 is uniformly dried and transmitted. Heat can be promoted, and the condensation performance of water vapor 7 generated from the dried object 1 can be enhanced.

By providing a connecting portion 17 detachable from the rotating shaft 16 at the lower portion of the container 2 to be dried, only the container 2 to be dried can be taken out. It is possible to do it and it is convenient. By providing a roller 31 as a rotation assisting tool at the upper end of the container 2 to be dried so as to be in contact with the inside of the cylindrical heat insulating container 3, smooth rotation can be realized.

By stopping the operation of the microwave oscillator 13 near the end of the process and operating only the heater 28, the ignition of the object 1 to be dried can be accurately prevented.
When the microwave oscillator 13 is operated, the temperature of the steam 7 is detected by the temperature detector 9 to suppress ignition.
In some cases, the temperature is slightly different, and it is difficult to determine the end strictly. Even in such a case, the operation of the microwave oscillator 13 is stopped near the end of the drying and the drying is continued only by the heater 28, whereby the ignition of the object 1 to be dried can be properly prevented.

When the object to be dried 1 containing no metal or moisture is irradiated with microwaves, the end of drying cannot be determined due to a rise in the temperature of the steam 7 because the steam 7 is not generated. In such a case, the operation of the microwave oscillator is stopped near the start of the processing, only the heater is operated, and if the temperature of the water vapor 7 does not increase, it is determined that the drying has been completed. 1 can be prevented from firing.

[0017]

As described above, according to the drying apparatus of the present invention, the following effects can be obtained.
During microwave drying, the outer surface of the condensing unit is air-cooled, and most of the water vapor generated from the object to be dried is condensed on the inner surface of the condensing unit to form condensed water, thereby reducing odor during drying. It is difficult to heat an object to be dried located in the vicinity of the microwave reflecting material by using only the microwave, but uniform drying can be promoted by using the heater in combination. Since the microwave has a characteristic of drying the object to be dried from the inside and the heater has a characteristic of drying the object to be dried from the outside, efficient use of the microwave and the heater enables efficient drying.

By arranging the cylindrical heat insulating container outside the container for storing the object to be dried, heat radiation from the object to be dried can be suppressed and high efficiency can be achieved. The object to be dried is rotated while being tilted, and microwaves are irradiated from the bottom of the condenser to stir the object to be dried and to uniformly dry the object to be dried. It is possible to enhance the performance of condensing water vapor generated from the object to be dried. By stirring the object to be dried, the volume of the object to be dried can be reduced.

By stopping the operation of the microwave oscillator near the end of the process and operating only the heater, it is possible to properly prevent ignition of the object to be dried.

[Brief description of the drawings]

FIG. 1 is a sectional view of a drying apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 2 Dry object storage container 3 Cylindrical heat insulating container 4 Condensing unit 9 Temperature detector 13 Microwave oscillator 14 Blower fan 18 Motor 28 Heater 30 Heater temperature detector 31 Roller 36 Catalyst device

Continuation of front page (72) Inventor Jiro Suzuki 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) B65F 5/00 F26B 11/08 F26B 23/04 F26B 23/08

Claims (6)

(57) [Claims] An object storage container for storing an object to be dried, a condenser, a condenser lid, a microwave oscillator for heating the object to be dried, and a blower fan for cooling an outer surface of the condenser. And a heater provided below the storage container for the object to be dried. 2. A drying object storage container for storing an object to be dried, a cylindrical heat insulating container located outside the drying object storage container, a condenser, a condenser lid, and heating the object to be dried. A microwave oscillator, a blower fan for cooling the outer surface of the condensing section, and a means for rotating the object-to-be-dried storage container in a tilted state, and a part of the bottom surface of the object-to-be-dried container is microscopically provided. A drying apparatus comprising a wave transmitting material, a microwave inlet positioned at the bottom of the condensing section, and a heater provided below the container to be dried. 3. A means for rotating the object-to-be-dried storage container in an inclined state, wherein a connection portion detachable from a rotating shaft is provided at a lower portion of the object-to-be-dried storage container, and the rotation shaft is rotated by a motor, 3. The drying apparatus according to claim 2, wherein a rotation assisting tool is provided at an upper end of the container to be dried so as to be in contact with the inside of the cylindrical heat insulating container. 4. The drying processing apparatus according to claim 1, wherein the operation of the microwave oscillator is stopped near the end of the processing, and only the heater is operated. 5. The drying processing apparatus according to claim 1, wherein the operation of the microwave oscillator is stopped near the start of the processing, and only the heater is operated. 6. The drying apparatus according to claim 1, further comprising a temperature detector for detecting a temperature of steam generated from the object to be dried.