JP2982434B2 - 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]

BACKGROUND ART system using an electric heater with a heating source in the drying apparatus, method using combustion heat, Ru system, etc. there is used a microwave. Since the drying apparatus using the combustion heat using a gas fuel, liquid fuel or the like, the entire apparatus becomes complicated and large, there is a drawback in safety. On the other hand,
Drying equipment using a heater has a simple configuration,
Nobility is excellent. Even those that use electric power
The drying equipment used has high drying efficiency and safety because the microwaves are selectively absorbed by the moisture in the material to be dried.
It is excellent and is suitable for drying treatment of a material to be dried having a high moisture content .

[0003]

However, this is not the case.
Drying process by heating using electric power in any method
The apparatus has the following problems. Dry matter after drying
Danger of ignition of dried material when heating is continued
However, it is difficult to accurately detect the end of drying using a simple method.
It was difficult. The present invention focuses on the microwave drying method
Clean and hygienic drying process
To provide a drying processing device that can accurately detect the end of drying
It is.

[0004]

[0005]

Since the present invention SUMMARY OF] is to solve the above problems, the object to be dried housing part for accommodating the material to be dried, the
Heating means for heating the material to be dried to generate water vapor;
It is provided with a discharge path for steam generated by the object to be dried and two temperature detectors for detecting the temperature of the steam.
I, the material to be dried to the heating means so as not to exceed a predetermined temperature the temperature of the temperature detector and on-off control closer to, of the heating means is remote from the material to be dried in the on state The drying process is terminated when the temperature rise value of the temperature detector falls below a predetermined temperature . Also, the second hand
As a step, a drying object storage section for storing the drying object,
Heating means for heating the material to be dried to generate water vapor;
A discharge path for water vapor generated from the object to be dried;
And two temperature detectors for detecting the temperature of the
The temperature of the temperature detector closer to the object to be dried is
Turn on / off the heating means so that the temperature does not exceed
Time from turning off the heating means to turning it on
Configuration to end the drying process when the time is less than the predetermined time
And

[0006]

According to the above arrangement, when the heating means is operated after the object to be dried is put into the object storage section , steam is generated and the object to be dried is dried . With the progress of Drying process, the temperature of the water vapor generated from the material to be dried increases. Therefore, the temperature of the temperature detector is closer to the material to be dried becomes a predetermined temperature
Thus , the drying process is continued while the output of the heating means is on-off controlled to prevent scorching of the object to be dried. With the on / off control, the temperature of the temperature detector farther from the object to be dried also rises and falls, but the temperature rise value decreases as the amount of water vapor decreases. Therefore, by terminating the drying process when the temperature rise value of the temperature detector farther from the object to be dried becomes equal to or less than the predetermined temperature, the end of drying can be accurately detected without causing scorching. .

[0007]

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

(First Embodiment) FIG. 1 is a sectional view showing a first embodiment of the present invention. In FIG. 1, a drying object storage unit 2 for storing a drying object 1 is located in a condensing unit 3, and the condensing unit 3 is provided with a drying object input lid 4. Although the dried material input lid 4 serves as both the condensing portion 3 and the lid of the dried material storage portion 2, the lid 4 does not need to be separated as a lid, and can be used as a part of the condensing portion 3 and the dried material storage portion 2. good. A ventilation section 6 is provided between the drying object storage section 2 and the condensation section 3 to allow water vapor 5 generated from the drying object 1 to flow out. The condenser part 3 is formed of a microwave reflecting material, and the material to be dried 4 is formed of a microwave transmitting material having excellent heat resistance. During the drying process, the condensing section 3 is installed in the processing chamber 7, but the condensing section 3 can be taken out of the processing chamber 7. Further, the condensing section 3 is positioned with respect to the processing chamber 7 by a rail 8 attached to a lower portion of the processing chamber 7. The processing chamber 7 includes a microwave oscillator 9, a microwave introduction unit 11 for introducing microwaves from the waveguide 10, an air inflow unit 14 for flowing air 13 from the blower fan 12, and air for discharging air 13. Outflow unit 15 and treatment chamber door 16
, A temperature detector A17 and a temperature detector B18. The temperature detector A17 is installed at a position closer to the object 1 to be dried than the temperature detector B18. Microwave introduction unit 11
Is installed above the processing chamber 7. Since the inside of the processing chamber 7 is a microwave space, the air inlet 14 and the air outlet 15
Are a plurality of small holes from which microwaves cannot escape to the outside of the processing chamber 7. The processing chamber door 16 is also hermetically sealed so that microwaves do not leak, and a door opening / closing detector 19 is installed so that the microwave oscillator 9 does not operate unless the processing chamber door 16 is completely closed. ing. In the present embodiment, the processing chamber 7 is provided outside the condensing section 3 so that the condensing section 3 can be taken out as a container. The condensed water outlet 2 is located below the condenser 3
0, a condensed water container 21, a condensed water trap 22, and a condensed water discharge passage 23 are provided below the condensed water outlet 20. Further, a gas suction pipe 24 for sucking gas (including odor) generated from the dried matter 1 is connected to the condensed water trap 22, and a moisture collector 25 and a gas collector 25 are provided upstream of the gas suction pipe 24. A deodorizing device 2 is located downstream of the suction pipe 24.
6. An intake fan 27 is provided. In this embodiment, the deodorizing device 26 is provided, but a catalytic device may be provided.

Next, the operation will be described. In FIG. 1, after the material 1 to be dried is put into the storage portion 2 for material to be dried, the lid 4 for charging the material to be dried is closed, and the condensing section 2 is placed in the processing chamber 7. When the microwave oscillator 9 is operated after confirming that the processing chamber door 16 is closed, the microwave passes through the waveguide 10 and passes from the microwave introduction unit 11 to the processing chamber 7.
Irradiated inside. If the processing chamber door 16 is not completely closed, the door opening / closing detector 19 detects the microwave oscillator 9.
Does not work. The microwaves radiated into the processing chamber 7 penetrate through the drying object charging port 4 formed of the microwave transmitting material, and start heating the drying object 1 in the drying object storage unit 2. In particular, the microwaves are selectively absorbed by the moisture in the dried object 1 to generate water vapor 5, and
Dries. Further, the blower fan 12 is operated together with the microwave oscillator 9 to send the air 13 from the air inlet 14 into the processing chamber 7. The air 13 flows out of the processing chamber 7 from the air outlet 15 after air cooling the outer surface of the condenser 3. The object 1 to be dried 1 is cooled by air cooling the outer surface of the condensing section 3.
Most of the water vapor 5 generated from the condensate is condensed on the inner surface of the condensing vessel 3 to form condensed water 28, and is discharged from the condensed water outlet 20 to the lower side of the condensed part 3. The condensed water outflow portion 20 does not discharge solids that would cause clogging in the sewer path, so that the environment is not adversely affected. As the drying process proceeds, the temperature of the steam 5 generated from the object 1 to be dried increases. Accordingly, the microwave oscillator 9 is turned on and off so that the temperature of the temperature detector A17 closer to the object 1 to be dried does not exceed a predetermined temperature, and the drying process is continued while the burning of the object 1 is suppressed. I do. With the on / off control, the temperature of the temperature detector B18 remote from the object 1 repeats rising and falling, but the temperature rise value decreases as the amount of water vapor decreases. Therefore, by ending the drying process when the temperature rise value of the temperature detector B18 farther from the object to be dried 1 becomes equal to or lower than the predetermined temperature, it is possible to accurately detect the end of drying without causing scorching. Can be.

Further, a temperature detector A closer to the object 1 to be dried.
17 is located in the object-to-be-dried storage section 2 and the temperature detector B18 farther from the object-to-be-dried 1 is located between the object-to-be-dried storage section 2 and the condensing section 3, so that control with excellent responsiveness is achieved. ,
End detection can be performed.

When the temperature of the temperature detector A17 closer to the object to be dried 1 reaches 105 to 110 ° C., the microwave oscillator 9 is turned off. When the temperature reaches 100 ° C., the microwave oscillator 9 is turned on. By terminating the drying process when the temperature rise value of the other temperature detector B18 becomes 5 ° C. or less, the drying rate (the amount of water loss after the treatment / the water content before the treatment) can be determined without causing scorching. It is possible to increase.

(Embodiment 2) Next, FIG. 2 shows a sectional view of Embodiment 2. In FIG. 1, two temperature detectors A17 and B18 are provided, but in FIG. 2, only one temperature detector A17 is provided. It is not necessary to limit the position of the temperature detector A17, but the detection responsiveness is higher near the object 1 to be dried.

The operation is almost the same as that of the first embodiment, but is different from the first embodiment.
Only the drying process is controlled and the end is detected. When the temperature of the steam 5 generated from the object 1 increases with the progress of the drying process, the microwave oscillator 9 is turned on and off so that the temperature of the temperature detector A17 does not exceed a predetermined temperature. The drying process is continued while suppressing the scorching of 1. With the on / off control, the temperature of the temperature detector A17 repeatedly rises and falls, but the time from when the microwave oscillator 9 is turned off to when it is turned on becomes shorter as the amount of water vapor decreases. Therefore, by ending the drying process when the time from when the microwave oscillator 9 is turned off to when it is turned on is equal to or shorter than a predetermined time, the end of drying can be accurately detected without causing scorching. .

The temperature of the temperature detector A17 is 105 to 105.
When the temperature reaches 110 ° C., the microwave oscillator 9 is turned off.
When the temperature reaches 0 ° C., the microwave oscillator 9 is turned on, and the drying process is terminated when the time from when the microwave oscillator 9 is turned off to when it is turned on becomes 10 seconds or less. Can be increased.

[0015]

As described above, according to the drying apparatus of the present invention, the following effects can be obtained.
Providing two temperature detectors for detecting the temperature of water vapor generated from the object to be dried , on / off control of the heating means so that the temperature of the temperature detector closer to the object to be dried does not exceed a predetermined temperature, By terminating the drying process when the temperature rise value of the temperature detector farther from the object to be dried falls below a predetermined temperature, it is possible to accurately detect the end of drying without causing scorching. . From the condensed water outflow portion, solids that may cause clogging in the sewer path are not discharged, so that clean and sanitary treatment can be performed without adversely affecting the environment. Further, the exhaust gas characteristics do not deteriorate.

[Brief description of the drawings]

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

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

[Explanation of symbols]

 2 Dry matter storage unit 3 Condensing unit 9 Microwave oscillator 12 Ventilation fan 17 Temperature detector A 18 Temperature detector B

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kunihiro Ukai 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-215400 (JP, A) (58) Survey Field (Int.Cl. ⁶ , DB name) F26B 3/347 F26B 21/10

Claims (7)

(57) [Claims] An object storage section for storing an object to be dried;
Heating means for heating the object to be dried to generate steam, a discharge path for steam generated by the object to be dried, and two temperature detectors for detecting the temperature of the steam; the material to be dried to the heating means on and off controlled so that the temperature of the hot side temperature detector towards not exceed a predetermined temperature close to the heating means is remote from the material to be dried in the on state drying apparatus for temperature rise of the low-temperature side temperature detector is equal to or to terminate the drying process when it is below a predetermined temperature. 2. The method according to claim 1, wherein the temperature sensor closer to the object to be dried is connected to the object to be dried.
The drying processing apparatus according to claim 1, wherein the drying processing apparatus is located in the storage unit. 3. A steam condensing section is provided in a steam path.
The temperature detector farther from the object to be dried
The drying treatment apparatus according to claim 1, wherein the drying treatment apparatus is located between the condensing section and the condensing section . 4. The method according to claim 1 , wherein the temperature of the temperature detector closer to the object to be dried is one.
Turn off the heating means at a predetermined temperature of
Which is turned on below, and which is farther from the object to be dried.
When the temperature rise value of the temperature detector falls below 5 ° C, the drying
The drying processing apparatus according to claim 1, wherein the drying process is terminated . 5. A drying object storage section for storing an object to be dried,
Heating means for heating the object to be dried to generate steam,
A discharge path for water vapor generated by the object to be dried;
With two temperature detectors to detect the temperature of the air
The temperature of the temperature detector closer to the object to be dried
Turn on / off the heating means so that it does not exceed a certain temperature
Control and the time from when the heating means is turned off to when it is turned on
The drying process should be terminated when the
And a drying apparatus. 6. The time from when the heating means is turned off until it is turned on.
Finish the drying process when the time is less than 10 seconds
The drying treatment apparatus according to claim 5, wherein: 7. The method according to claim 1, wherein the heating means is a microwave.
7. The drying treatment apparatus according to any one of claims 6 to 9.