JPS6116905B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reduced pressure equilibrium friction heat generation device having a reduced pressure equilibrium friction heat generation mechanism and a heat exchange mechanism.

Regarding the reduced pressure equilibrium heating device, the present inventor has already published JP-A-57-19582, JP-A-57-19583, and JP-A-57-1958.
-55379, JP-A-57-55378, JP-A-57-
No. 144869, JP-A-57-164276, JP-A-58-
The basic technology and its applied technology were proposed in publications such as No. 45483 and Japanese Unexamined Patent Publication No. 182060/1983.

That is, in the past, drying of materials to be dried in a hollow chamber generally required a separate heat source and a blower device for blowing heated gas, which had the disadvantage that energy was not utilized effectively. Therefore, a drying apparatus and a drying method consisting of a hollow chamber having a reduced pressure equilibrium frictional heat generation mechanism that does not require a special heat source, namely,
The air inside the sealed hollow chamber is forcibly sucked in and exhausted to the outside by the rotating action of the rotating body, and the pressure inside the room is reduced to keep the pressure difference between the inside and outside in a substantially constant equilibrium state, and this equilibrium state is maintained. However, the rotating action of the rotating body is continued to promote frictional action with the air to generate frictional heat, and this frictional heat heats the inside of the hollow chamber and is used as a heat source. We proposed a device and method for drying materials in a hollow chamber by supplying outside air manually or automatically. On the other hand, the outside air intake action and the exhaust action are made to work in opposite directions within the same heat exchange mechanism, and the amount of heat held by the high temperature gas in the exhaust process is absorbed by the low temperature gas in the intake process, resulting in almost complete heat exchange. Japanese Patent Laid-Open No. 182060/1983 has proposed a decompression equilibrium friction heat generating device having a heat exchange mechanism for the purpose of almost eliminating heat loss and preventing a drop in temperature within the hollow chamber.

Furthermore, the inventor discovered the following in the process of drying various materials to be dried using a vacuum equilibrium friction heat heating device having a vacuum equilibrium friction heat generation mechanism and a heat exchange mechanism. Generally, extreme high temperatures are not required for drying mushrooms such as shiitake mushrooms.In fact, if high temperatures are applied, the surface will remain deformed and internal moisture will remain, resulting in incomplete drying.For this reason, natural drying is used. However, natural drying has the disadvantage that nutrients are lost due to the physiological effects of the plants. By the way, the depressurized equilibrium friction heat generating device is highly efficient, so it is easy to obtain high temperatures quickly and tends to overheat.In order to obtain high quality dried products, the rotation of the rotating body must be frequently interrupted to prevent overheating, or a separate cooling mechanism must be provided. This has the drawback of reducing operating efficiency. In addition, when drying the material to be dried, not only the material to be dried but also the moisture contained in the material to be dried that is discharged into the room, the water vapor of the contained moisture that is discharged into the room, and the indoor gas are also removed during the drying process. It will heat up. By the way, since water has a high specific heat, the amount of heat required to heat it to the same temperature is greater than that of other substances, but conversely, the amount of heat it contains when heated to the same temperature is large. On the other hand, it was also found that when multiple rotating bodies of the friction heat generation mechanism are installed in series, the temperature becomes higher near the rotating bodies on the exhaust side.
However, in the conventional reduced pressure equilibrium frictional heat heating device having a reduced pressure equilibrium frictional heat generation mechanism and a heat exchange mechanism, the indoor gas containing moisture discharged from the material to be dried is not effectively utilized. Conventional methods and devices have had the disadvantage of poor operating efficiency and drying efficiency, as they only exchange heat with the gas introduced into the room and then discharge it outdoors. This invention is based on these findings. That is, this invention forcibly suctions the gas inside the hollow chamber by the rotating action of the rotary body and exhausts it to the outside, reduces the pressure in the chamber, maintains the pressure difference between the inside and outside in a substantially constant equilibrium state, and maintains this equilibrium state. While maintaining the temperature, the rotating action of the rotating body is continued to promote the frictional action with the gas to generate frictional heat, and this frictional heat heats the inside of the hollow chamber to reduce pressure and heat the material to be processed inside the hollow chamber. It has an equilibrium friction heat generation mechanism and a hollow chamber circulation mechanism having a plurality of passages, and by integrating the exhaust side of the hollow chamber circulation mechanism and the decompression equilibrium friction heat generation mechanism, a heat exchange mechanism is formed. The above drawbacks are eliminated by providing a depressurized equilibrium friction heat generating device characterized by allowing gas to selectively pass through a plurality of passages of the circulation mechanism and installing a heat storage material in one of the passages, thereby eliminating the above drawbacks and improving operation. The purpose is to provide a device that is efficient and has good drying efficiency.

The following is a first diagram showing a central cross section of an embodiment of the present invention.
This will be explained according to the diagram. Reference numeral 1 denotes a hollow chamber, which is formed in a sealed state except for necessary ventilation points. Reference numeral 2 denotes a depressurized equilibrium friction heat generation mechanism installed inside the hollow chamber 1, and in this embodiment, a rotating body 3 having rotating blades,
3', 3'' and rotating bodies 3, 3', 3'' are installed in substantially cylindrical suction cylinders 4, 4', 4'', stacked vertically in three stages in series.The rotating bodies and The number of suction cylinders can be selected arbitrarily. The rotary bodies 3, 3', 3'' can be rotated by a motor 5 in the direction of sucking and exhausting gas such as air in the hollow chamber 1. A driven rotation mechanism proposed in Japanese Patent Application Laid-Open No. 172492/1983 may be installed on the upper part of the rotating body 3.

In other words, it is a mechanism in which a driven fan 7 is pivotally supported at a position facing and appropriately separated from the upper part of the rotating body 3, and is rotatable as a result of the rotation of the opposing rotating body 3. When such a mechanism is installed, it is possible to diffuse the gas in the hollow chamber 1 and generate a forced airflow within the hollow chamber 1, which promotes the drying effect and contributes to a rise in temperature. Become. Frictional heat generating portions A, A', A'' are formed in each rotating region of the rotating bodies 3, 3', 3''. Reference numeral 8 denotes a hollow chamber circulation mechanism, which connects the upper and lower parts of the hollow chamber 1 and has a circulation fan 13 rotatable by a motor 12 at the lower part. Hollow chamber circulation mechanism 8
A heat exchange mechanism 11 is formed by integrally incorporating the exhaust side of the friction heat generation mechanism 2 in the middle. The hollow chamber circulation mechanism 8 is also divided into two passages 9 and 9' in the middle, and the passage can be selected by the action of a valve 10.In one passage 9, a substance with a large specific heat, water in this embodiment, is carried. The used heat storage material 11 is installed. In this embodiment, thin synthetic resin pipes are stacked and water is stored in the pipes. 15
is the processed material to be dried, such as shiitake mushrooms and wood, placed in the hollow chamber. 16 is an outside air introduction pipe;
It is possible to supply outdoor gas into the hollow chamber 1 via a valve 17 according to the required amount. Outside air introduction pipe 16
In this embodiment, a so-called heat exchange mechanism 14' disclosed in JP-A-58-182060 is provided by passing through the exhaust side of the decompression equilibrium friction heat generation mechanism 2 on the way to communicate with the outside of the hollow chamber.

Therefore, when the motor 5 is energized and the rotating bodies 3, 3', 3'' having rotating blades are rotated, the gas such as air in the sealed hollow chamber 1 is sucked and exhausted by the rotating bodies 3, 3', 3''. Therefore, the air is gradually evacuated in the direction of arrow B, and the pressure is reduced, and the pressure difference between the interior and exterior of the hollow chamber 1 gradually increases, but when a certain pressure difference is reached, a substantially equilibrium state is reached, and this equilibrium state is maintained. In this equilibrium state, the pressure difference between the inside and outside of the hollow chamber 1 is as follows:
3′, 3″ rotation suction force and intake cylinder 4,
This equilibrium state is determined by the diameter of 4', 4'' and the size of the gap between the rotating bodies 3, 3', 3'', and the rotational action of the rotating bodies 3, 3', 3'' continues. will be maintained for as long as possible.

In this equilibrium state, air stagnates in the frictional heat generating part in the rotation area of the rotating body 3, and the frictional action with the rotating bodies 3, 3'3'' continues to repeat, so frictional heat is generated and the temperature gradually increases. This frictional heat is transmitted into the hollow body 1 and heats the interior to the desired temperature.The temperature near each of the rotating bodies 3, 3', and 3'' is highest near the rotating body 3'', which is closest to the exhaust side. The temperature sequentially becomes lower near the rotating body 3' and near the rotating body 3.

Gas such as air in the hollow chamber is circulated in the direction of arrow C by the hollow chamber circulation mechanism 8, but since a heat exchange mechanism 14 is formed integrally with the exhaust side of the friction heat generation mechanism 2, the gas exchanges heat with exhaust heat. is introduced into the hollow chamber 1. In this case, the passage 9' without the heat storage material 11
use. The gas in the hollow chamber circulation mechanism 8 that exchanges heat contains a lot of water and has a higher specific heat than the same dry gas, so even though the amount of heat absorbed during heat exchange is large. First, it becomes possible to avoid sudden changes in the temperature of the gas within the hollow chamber 1.

When the hollow chamber becomes overheated, the gas passing through the hollow chamber circulation mechanism 8 is introduced into the passage 9 having the heat storage material 11 by switching the valve 10. Since water has a high specific heat, it is possible to prevent a rise in temperature compared to other materials in terms of the rate of absorption of heat. If the temperature rises further, stop the operation of the friction heat generation mechanism 2,
The heat stored in the heat storage material is introduced into the hollow chamber 1 by the hollow chamber circulation mechanism 8. When the temperature inside the hollow chamber 1 drops, the operation of the frictional heat generating mechanism 2 is restarted to heat the inside of the hollow chamber 1. Thereafter, depending on the temperature inside the hollow chamber 1, the passages 9 and 9' are switched, and the friction heat generating mechanism is operated and stopped. Also, hollow chamber 1
If the air becomes overhumid, outside air is introduced from the outside air introduction pipe 16 to reduce humidity. In this embodiment, since the outside air introduction pipe 16 has a heat exchange mechanism 14', the outside air to be introduced is preheated, and exhaust heat can be utilized. Therefore, this invention uses the moisture contained in the material to be dried as a kind of heat storage material, so it is possible to prevent sudden temperature changes, and it is possible to continuously perform smooth heating suitable for drying, which improves operational efficiency. , the drying efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a central sectional view of an embodiment of the present invention. 1...Hollow chamber, 2...Friction heat generation mechanism, 3,
3', 3''...rotating body, 4, 4', 4''...intake cylinder,
5... Motor, 6... Driven rotation mechanism, 7... Driven fan, 8... Hollow chamber circulation mechanism, 9, 9'... Passage, 10... Valve, 11... Heat storage material, 12... Motor, 13...Circulation fan, 14, 14'...Heat exchange mechanism, 15...Processed material, 16...Outside air introduction pipe,
17...Valve.

Claims (1)

[Scope of Claims] 1. The gas in the hollow chamber is forcibly suctioned by the rotational action of a rotating body and exhausted to the outside, and the pressure inside the chamber is reduced to keep the pressure difference between the inside and outside in a substantially constant equilibrium state,
While maintaining this equilibrium state, the rotating action of the rotating body is continued to promote frictional action with the gas to generate frictional heat, and this frictional heat heats the inside of the hollow chamber to cool the processing material inside the hollow chamber. It has a reduced pressure equilibrium friction heat generation mechanism that heats under reduced pressure and a hollow chamber circulation mechanism having a plurality of passages, and forms a heat exchange mechanism by integrating the exhaust side of the hollow chamber circulation mechanism and the reduced pressure equilibrium friction heat generation mechanism. Further, a reduced pressure equilibrium friction heat generation device is characterized in that gas is selectively allowed to pass through a plurality of passages of the hollow chamber circulation mechanism, and a heat storage material is installed in one of the passages. 2. The reduced pressure balanced friction heat generation device according to claim 1, wherein the reduced pressure balanced friction heat generation mechanism comprises a multi-stage rotating body. 3. The reduced-pressure equilibrium friction heat generating device according to claim 2, wherein the multi-stage rotating body is in the hollow chamber. 4. The reduced pressure equilibrium friction heat generating device according to claim 1, 2, or 3, wherein the heat storage material is a material with high specific heat. 5. The reduced pressure equilibrium friction heat generating device according to claim 1, 2 or 3, wherein the heat storage material is water.