JPH0243100B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention involves rotating a flexible belt spirally wound around a drum and rotating the drum. During the transportation process, cooling, heating, humidification,
This invention relates to a parts processing machine using an endless conveyor that performs processing such as drying.

(Prior art) This type of parts processing machine using an endless conveyor has been known for a long time, for example,
As shown in Japanese Patent No. 13228, there is a device that uses a vertical wind system, but this vertical wind system uses a drum 1 that is rotated around a vertical axis and a cylinder 2 that covers the drum 1 as shown in Fig. 4. Flexible belt 1 in the space of
3, the belt 13 is wound around the drum 1 in a spiral manner, and the belt 13 is spirally rotated by the rotation of the drum 1. Since the vertical wind type can generate wind as a counterflow, it is said to have the advantage of high heat treatment efficiency as the heat transfer coefficient improves due to the generation of turbulent flow.

(Problems to be Solved by the Invention) Although the above-mentioned vertical wind system has the advantage of counterflow, when considering the case of a processing machine for ultra-low temperature freezing, the cylinder 2 is made of metal and is subject to heat shrinkage due to low temperature. In consideration of this, the inner wall surface of the heat-insulating treatment chamber 3 and the upper edge of the cylinder 2 are not tightly fixed, but are sealed with rubber sealing material or the like to cope with heat shrinkage. The seal structure is complicated, and the amount of cold air that bypasses the cold air sent toward the conveyor increases.
A problem is that cooling efficiency decreases.

Furthermore, in this conventional device, the space between the cylinder 2 and the heat-insulating processing chamber 3 is used as the chamber 10. Another problem was that a large amount of cold air leaked from both parts.

In view of the fact that the conventional apparatus has various problems, the present invention has been made to improve the problem, and the present invention is to provide a housing mechanism of an article processing machine with an intermediate pressure around a high pressure chamber. By adopting a double chamber structure with a chamber, it is possible to reduce the pressure difference and temperature difference with the outside, thereby preventing leakage of processing air as much as possible, improving processing efficiency and saving energy. The purpose is to reduce losses.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a drum 1 whose top part is covered with a top plate and rotates around a vertical axis, a top part of which is covered with a top plate, An air circulation part 6 is opened at the lower part of the peripheral wall, and a cylinder 2 is covered with the drum 1 to form a space on the sides and above the drum 1, and a heat insulating wall surrounds the drum 1 and the cylinder 2. A heat insulating treatment chamber 3 is formed by forming an airtight space on the sides and above the cylinder 2, and the air outlet 7 is connected to the upper part of the cylinder 2 to form a space between the top plate of the drum 1 and the top plate of the cylinder 2. An air processing section comprising a fan 11 and an air processing element 12 interposed in a duct 9 disposed inside the heat insulation processing chamber 3 with the suction port 8 open while facing the air chamber 10 formed in the air chamber 10 4. Wrap the flexible belt 13 around the drum 1 in a spiral shape, and horizontally cross the circumferential wall of the cylinder 2 and the heat insulating wall of the heat insulating treatment chamber 3 from the upper outlet end and the lower inlet end. Each element of the endless conveyor 5, which is extended outside the room, constitutes an endless conveyor article processing machine.

(Function) In the present invention, the cylinder 2 is separated from the heat insulating wall of the heat insulating treatment chamber 3, and can be integrated with the duct 9 using the same material, thereby eliminating airflow leakage from the air chamber 10, which is a high pressure part. be able to.

In addition, the inside of the heat insulation treatment chamber 3 around the cylinder 2 and the air treatment section 4 has an atmosphere equal to the pressure on the suction side of the fan 11, so that it is possible to reduce the pressure difference between the inside of the heat insulation treatment chamber 3 and the outside of the heat insulation treatment chamber 3. Therefore, airflow leakage from the openings passing through the flexible belt 13 can be reduced, and heat loss can be reduced.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

1 and 2 are an elevational view and a plan view schematically showing the structure of an example of the present invention, and the illustrated article processing machine, such as a low-temperature freezer, has a drum 1, a cylinder 2,
A heat insulation treatment chamber 3 and a cooling device 4 as an air treatment section
and an endless conveyor 5 as main components.

The drum 1 is arranged rotatably around a vertically erected center shaft 14, and is received by rotating rollers at a plurality of dispersed locations around its lower end.
Although it is connected to a drive motor via a suitable power transmission mechanism, the top part is hermetically closed by a top plate 15.

On the other hand, the cylinder 2 is a metal cylindrical plate,
The drum is larger in diameter and height than the drum 1,
Moreover, the top part is airtightly closed by the top plate 16, and the air circulation part 6 is opened in the lower part of the peripheral wall. A space of appropriate size is formed on the sides and above the periphery.

Next, the heat insulation treatment chamber 3 has an outer casing formed by combining heat insulation panels having a heat insulation layer such as foamed urethane resin as the core material, and has a space of an appropriate size on the sides and above the cylinder 2. Therefore, a cylinder 2 and a drum 1 are built in.

The cooling device 4 includes a horizontally disposed cylinder whose lower end is open as a suction port 8 and a horizontally arranged cylinder whose end is connected at right angles to the upper part of the cylinder and whose end is opened as an air outlet 7. It has a structure in which a cooler 12 consisting of an evaporator as an air treatment element and a fan 11 are interposed from the suction port 8 side in a hook-shaped duct 9 consisting of a The suction port 8 is opened downward, and the blowout port 7 is connected to the upper part of the cylinder 2 so as to be integrated with the cylinder 2.

In this cooling device 4, as shown in FIG. 3, it is easy to form a structure in which the duct 9 and the cylinder 2 are made of the same material so that both top portions are flush with each other. In a preferred embodiment, the air outlet 7 is connected to a position directly facing the air chamber 10 formed between the top plate 15 of the drum 1 and the top plate 16 of the cylinder 2.

An endless conveyor 5 is disposed on the lateral side of the drum 1 in the space formed between the drum 1 and the cylinder 2. It is wrapped around the circumferential surface of drum 1 in a spiral slope shape.
The flexible belt 13 rotates integrally in response to the rotation of the flexible belt 13 and can run spirally from the lower side to the upper side, while the remaining part of the flexible belt 13 is extended horizontally from the upper outlet side end and the lower inlet side end. and pass through a slit-shaped outlet provided in the upper part of the peripheral wall of the cylinder 2 and a slit-shaped inlet provided in the lower part of the peripheral wall, respectively,
Further, it passes through a slit-shaped outlet provided in the upper part of the heat-insulating wall of the heat-insulating treatment chamber 3 and a slit-shaped inlet provided in the lower part of the heat-insulating wall, respectively, and is drawn out to the outside.

The low-temperature freezing machine having the above-mentioned configuration operates for freezing by driving the drum 1 to rotate, sending low-pressure low-temperature refrigerant to the cooler 12, and rotating the fan 11. 5 operates to transfer the loaded items to be frozen from the lower part to the upper part by spiral rotation, and after a predetermined time has elapsed, to send them out through the heat insulation processing chamber 3 as described above.

On the other hand, due to the air flow generated by the fan 11, the air introduced from the adiabatic processing chamber 3, which has been cooled to an ultra-low temperature by the cooler 12, is blown into the air chamber 10, creating an atmosphere of, for example, -30°C, and this cold air is forms a counterflow against the running endless conveyor 5 and flows down between the circumferential wall of the drum 1 and the circumferential wall of the cylinder 2, thereby contributing to the cooling and freezing of the products to be frozen. From there, it is sent out to the heat insulation treatment chamber 3 and then introduced into the duct 9 again.

Thus, the temperature distribution state is -30°C inside the air chamber 10 and -20°C in the space around and above the cylinder 2 in the heat-insulating processing chamber 3, while the pressure distribution state is especially the above-mentioned temperature distribution state around the drum 1. The atmosphere inside the air chamber 10 has the highest pressure, and the inside of the heat insulation treatment chamber 3 has the same pressure as the suction side of the fan 11, creating an atmosphere with an intermediate value, and the pressure is slightly higher than the atmospheric pressure outside the heat insulation treatment chamber 3. form a region.

As is clear from the above temperature and pressure distribution state,
An atmosphere of intermediate temperature and pressure exists between the air chamber 10 and the atmosphere above the top wall of the adiabatic treatment chamber 3, which limits the amount of cold heat transferred to the atmosphere through the adiabatic wall of the adiabatic treatment chamber 3. On the other hand, endless conveyor 5
The amount of cold air leaking outside from the slit-shaped outlet and inlet of the heat-insulating processing chamber 3 into which the flexible belt 13 enters and exits can also be minimized because the processing chamber 3 is in an intermediate pressure region.

As shown in the figure, a turbo fan is used as the fan 11, and the turbo fan is disposed along the vertical axis at a right angle bend in the duct 9, and is axially connected to a motor installed in the heat insulation treatment chamber 3 outside the duct 9. The air processing unit 4 may be configured as follows; in this case, since the motor is located outside the duct, the cooling efficiency of the product is improved, and the bending portion of the cooling air can be absorbed by the fan, improving the air blowing efficiency. Not only that, but it also has the effect of saving space.

(Effects of the Invention) The effects of the present invention are as follows.

(a) The air processing section 4 is directly connected to the air chamber 10 formed between the top plates of the drum 1 and the cylinder 2, and this part is provided so that an intermediate pressure region exists between the heat insulating wall of the heat insulating processing chamber 3. As a result, the amount of heat leaking outside through the heat insulating wall can be minimized, making it possible to provide an apparatus with low heat loss.

(b) Since the inside of the adiabatic treatment chamber 3 is an intermediate pressure atmosphere that communicates with the suction side of the air treatment section 4, the adiabatic treatment chamber 3
It is possible to reduce the pressure difference with the outside atmosphere, thus reducing the leakage of processing air from the exit and inlet where the endless conveyor 5 enters and exits, improving article processing efficiency and reducing processing costs. .

[Brief explanation of the drawing]

1 and 2 are a schematic elevation view and a schematic plan view according to an example of the present invention, FIG. 3 is a perspective view of main parts according to an example of the present invention, and FIG. 4 is a conventional article processing machine. FIG. 1...Drum, 2...Cylinder, 3...Insulation treatment chamber, 4...Air treatment section, 5...Endless conveyor,
6... Air circulation part, 7... Air outlet, 8... Suction port, 9... Duct, 10... Air chamber, 11
...Fan, 12...Air treatment element, 13...Flexible belt.

Claims (1)

[Claims] 1 A drum 1 whose top part is covered with a top plate and rotates around a vertical axis, whose top part is covered with a top plate, and an air circulation part 6 is opened at the lower part of the peripheral wall, and the drum 1 has a top part covered with a top plate and an air circulation part 6 that is opened at the lower part of the peripheral wall, so that the drum 1 is rotated around a vertical axis. The drum 1 to form a space above
The cylinder 2 is hidden by the cylinder 2, the insulation processing chamber 3 is formed by surrounding the drum 1 and the cylinder 2 with an insulation wall to form a sealed space on the sides and above the cylinder 2, and the air outlet 7 is connected to the cylinder 2. The suction port 8 is connected to the upper part and faces the air chamber 10 formed between the top plate of the drum 1 and the top plate of the cylinder 2.
An air processing section 4 in which a fan 11 and an air processing element 12 are interposed in a duct 9 disposed in the heat insulation processing chamber 3 by opening the air processing section 4, and a flexible belt 1.
3 spirally wound around the drum 1, horizontally crossing the circumferential wall of the cylinder 2 and the heat insulating wall of the heat insulating treatment chamber 3 from the upper outlet end and the lower inlet end to extend outside the room. An article processing machine using an endless conveyor, characterized in that it is equipped with an endless conveyor 5.