JPH05275169A - Dry processing device - Google Patents

Abstract

PURPOSE:To provide a dry processing device capable of performing clean and hygienic dry processing and sensing the end of processing properly by incorporating a drying system which uses microwaves. CONSTITUTION:The first temp. sensor 9 and second temp. sensor 10 are furnished to sense the temp. of water vapor 4 generated from an object to be dried 1. The dry processing is continued with the microwave output put under control so that the temp. due to the first temp. sensor 9, which is situated nearer the object 1 attains the specified value, and ended when the temp. change amount due to the second temp. sensor 10 farther from the object 1 exceeds a specified amount.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Drying apparatuses include a method using an electric heater depending on a heating source, a method using combustion heat, a method using microwaves, and the like. Although a drying apparatus using an electric heater is excellent in safety and controllability, it causes a large heat radiation loss, which makes it difficult to improve the drying efficiency. Since the drying processing apparatus using combustion heat uses gas fuel, liquid fuel, etc., the entire apparatus becomes complicated and large, and there is a problem in safety. On the other hand, in the case of a drying apparatus that uses microwaves, the microwaves are selectively absorbed by the moisture in the material to be dried, so the drying efficiency is high, the safety is excellent, and the entire apparatus is complicated and large. Nonetheless, it is suitable for the drying treatment of the material to be dried having a high water content.

[0003]

However, such a conventional drying apparatus using microwaves also has the following problems. If you continue to irradiate the material to be dried even after drying with microwaves, the material to be dried may ignite,
When microwaves are used for the drying process, it is difficult to accurately detect the end of drying. In addition, water vapor generated from the material to be dried may condense after being discharged to pollute the inside and outside of the room.

The present invention pays attention to a microwave drying method, and provides a drying processing apparatus which can perform a clean and hygienic drying processing and can accurately detect the end time of the drying.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an article to be dried storage section for storing articles to be dried, a condensing section located outside the article storage section to be dried, and an article to be dried. A microwave oscillator for heating and two temperature detectors for detecting the temperature of water vapor generated from the substance to be dried are provided, and microwaves are provided so that the temperature of the temperature detector closer to the substance to be dried becomes a predetermined temperature. The drying processing device controls the output and terminates the drying processing when the temperature change amount of the temperature detector farther from the object to be dried becomes a predetermined amount or more.

Further, the dry matter processing apparatus is characterized in that the dry processing is terminated when the reduction rate of the power consumption value of the microwave oscillator becomes equal to or higher than a predetermined rate.

[0007]

With the above structure, when the microwave oscillator is activated after the object to be dried is put into the object to be dried storage section, the microwave starts heating the object to be dried. In particular, microwaves are selectively absorbed with respect to water in the material to be dried, and steam is generated to dry the material to be dried. Then, the water vapor is condensed on the inner surface of the condensing unit and discharged as condensed water to the outside of the condensing unit.
As the drying process progresses, the temperature of steam generated from the material to be dried rises. Therefore, the microwave output is controlled so that the temperature of the temperature detector closer to the object to be dried becomes a predetermined temperature, and the drying process is continued while preventing the object to be dried from burning. As the amount of water vapor decreases when the drying is completed, the temperature of the temperature detector far from the object to be dried changes. Therefore, by ending the drying process when the temperature change amount of the temperature detector farther from the object to be dried reaches a predetermined amount or more, it is possible to accurately detect the end of drying without causing scorching. Becomes

Further, the method of judging by the power consumption of the microwave source is simple because it can be constituted by one temperature detector.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete description will be given below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view showing Embodiment 1 of the present invention. In FIG. 1, an article-to-be-stored 2 for accommodating an article-to-be-dried 1 is located in a condenser 3, and the article-to-be-stored 2 can be taken out from the condenser 3. A ventilation part 5 for letting out water vapor 4 generated from the material to be dried 1 is provided between the material to be dried storage part 2 and the condensing part 3. The condensing unit 3 is formed of a microwave reflecting material, and the condensing unit 3 includes a microwave oscillator 6, a microwave introducing unit 8 for introducing microwaves from the waveguide 7, a first temperature detector 9, and a first temperature detector 9. The two temperature detector 10 and the condensation part door 11 are provided. The first temperature detector 9 is installed at a position closer to the article to be dried 1 than the second temperature detector 10. A blower fan 12 is provided so that the outer surface of the condensing unit 3 is exhausted. A condensed water outflow portion 13 is provided below the condensing portion 3, and a condensed water container 14, a condensed water trap 15, and a condensed water discharge passage 16 are provided below the condensed water outflow portion 13. Further, a gas suction pipe 17 for sucking gas (including odor) generated from the material to be dried 1 is connected to the condensed water trap 15, and a moisture collector 18 and a gas are provided on the upstream side of the gas suction pipe 17. A catalyst device 19 and an intake fan 20 are provided on the downstream side of the suction pipe 17. The outer wall 21 is provided with an air inflow portion 23 for inflowing the air 22 and an air outflow portion 24 for outflowing the air 22.

Next, the operation will be described. In FIG. 1, after the article to be dried 1 is put into the article to be dried storage section 2, the article to be dried storage section 2 is stored in the condensing section 3. When the microwave oscillator 6 is operated after confirming that the condenser section door 11 is closed, microwaves are radiated from the microwave introduction section 8 into the condenser section 3 through the waveguide 7. The microwave radiated into the condensing unit 3 starts heating the material to be dried 1 in the material to be dried housing unit 2. In particular, the microwave is selectively absorbed with respect to the water content in the material to be dried 1, water vapor 4 is generated, and the material to be dried 1 is dried. In addition, the microwave oscillator 6
At the same time, the blower fan 12 is operated to cool the outer surface of the condensing part 3 by air. By air-cooling the outer surface of the condensing part 3, most of the water vapor 4 generated from the material to be dried 1 is condensed on the inner surface of the condensing part 3 to form condensed water 25, which is discharged from the condensed water outflow part 13 to the lower side of the condensing part 3. To do. The condensed water outflow portion 13 does not discharge solid matter that may cause clogging of the sewer path, and thus does not adversely affect the environment. With the progress of the drying process, the temperature of the steam 4 generated from the material to be dried 1 rises. Therefore, the first temperature detector 9 closer to the article to be dried 1
The microwave output is controlled so that the temperature becomes a predetermined temperature, and the drying process is continued while preventing the object to be dried from being scorched. Since the amount of water vapor decreases when the drying is completed, the temperature of the second temperature detector 10 far from the article to be dried 1 changes (decreases). Therefore, by ending the drying process when the temperature change amount of the second temperature detector 10 becomes equal to or more than the predetermined amount, it is possible to accurately detect the end of drying without causing scorching.

Further, the first temperature detector 9 closer to the article to be dried 1 is located in the article storage portion 2 and the second temperature detector 10 farther from the article 1 to be dried is accommodated in the article to be dried. By locating it between the section 2 and the condenser section 3, it is possible to perform control with excellent responsiveness and end detection.

The microwave output is controlled so that the temperature of the first temperature detector 9 closer to the object to be dried 1 is 100 to 110 ° C., and the temperature of the second temperature detector 10 farther from the object to be dried. By ending the drying process when the amount of change becomes 10 ° C. or more, it is possible to increase the drying rate (reduction of water content after treatment / water content before treatment) without causing charring.

(Embodiment 2) Next, a sectional view of Embodiment 2 is shown in FIG. Although two first temperature detectors 9 and two second temperature detectors 10 are provided in FIG. 1, only one (first) temperature detector 9 is provided in FIG. It is not necessary to limit the position of the temperature detector 9, but the closer to the article to be dried 1, the higher the detection response.

The operation is almost the same as that of the first embodiment, but unlike the first embodiment, in the second embodiment, only the temperature detector 9 controls the drying process and the end detection. With the progress of the drying process, the temperature of the steam 4 generated from the material to be dried 1 rises. Therefore, the microwave output is controlled so that the temperature of the temperature detector 9 reaches a predetermined temperature, and the drying process is continued while preventing the object to be dried from burning. Since the amount of water vapor decreases when the drying is completed, the power consumption value of the microwave oscillator 6 decreases. Therefore, by ending the drying process when the reduction rate of the power consumption value of the microwave oscillator 6 becomes equal to or higher than the predetermined rate, it is possible to accurately detect the end of drying without causing scorching. The second embodiment differs from the first embodiment in that only one temperature detector needs to be provided.

Further, the temperature of the temperature detector 9 is 100 to 11
By controlling the microwave output so that it becomes 0 ° C, and ending the drying process when the reduction rate of the power consumption value of the microwave oscillator reaches 10% or more, the drying rate is increased without causing charring. It becomes possible.

[0017]

As described above, according to the drying apparatus of the present invention, the following effects can be obtained.
Two temperature detectors that detect the temperature of the water vapor generated from the material to be dried are provided, and the microwave output is controlled so that the temperature of the temperature detector closer to the material to be dried becomes a predetermined temperature, and the drying process is performed. By continuing the drying process when the temperature change amount of the temperature detector farther from the object to be dried reaches a predetermined amount or more, it is possible to accurately detect the end of drying without causing charring. It will be possible. Further, since the solid content that causes clogging of the sewer passage is not discharged from the condensed water outflow portion, clean and hygienic treatment can be performed without adversely affecting the environment. Since the method of drying treatment by microwave is used, the exhaust gas characteristics do not deteriorate. Further, the method of judging by the power consumption of the microwave source is simple because it can be constituted by one temperature detector.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a drying processing apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

 2 Dried object storage part 3 Condensing part 6 Microwave oscillator 9 First temperature detector 10 Second temperature detector 12 Blower fan

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunihiro Ukai 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. An article-to-be-dried containing section for containing articles to be dried, a condenser located outside the article-to-be-dried accommodation section, a microwave oscillator for heating the article-to-be-dried, and a unit to be dried. Two temperature detectors for detecting the temperature of the generated steam are provided, and the microwave output is controlled so that the temperature of the temperature detector closer to the object to be dried becomes a predetermined temperature. A dry matter processing apparatus, which terminates the drying process when the temperature change amount of the remote temperature detector exceeds a predetermined amount. 2. A temperature detector closer to the article to be dried is located in the article storage section, and a temperature detector farther from the article is located between the article storage section and the condensation section. The dry matter processing apparatus according to claim 1, wherein 3. The temperature of the temperature detector closer to the object to be dried is 1
The microwave output is controlled so that the temperature becomes 0 to 110 ° C.
The temperature change amount of the temperature detector farther from the object to be dried is 1
The dry matter processing apparatus according to claim 1, wherein the drying process is terminated when the temperature becomes 0 ° C or higher. 4. An article-to-be-dried containing section for containing an article to be dried, a condenser located outside the article-to-be-dried storage section, a microwave oscillator for heating the article-to-be-dried, and a unit to be dried. Provided with a temperature detector for detecting the temperature of the generated steam,
The microwave output is controlled so that the temperature of the temperature detector reaches a predetermined temperature, and the drying process is terminated when the reduction rate of the power consumption value of the microwave oscillator reaches a predetermined rate or more. Material processing equipment. 5. The microwave output is controlled so that the temperature of the temperature detector becomes 100 to 110 ° C., and the drying process is terminated when the reduction rate of the power consumption value of the microwave oscillator reaches 10% or more. The dry matter processing device according to claim 4.