JPH1024416A - Apparatus for reducing volume of waste plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the operation inferiority and erroneous operation of a control part by providing a waterproof cover to the control part and providing a heat transfer means transmitting the heat generated in the control part to the outside of the waterproof cover. SOLUTION: A heating means, a pressure part 3 pressing softened waste plastic to reduce the vol. thereof and a control part 24 are provided in a main body 1 and a waterproof cover 38 is provided to the control part 24 and a heat transfer means 29 transmitting the heat generated from the control part 24 to the outside of the waterproof cover 38 is also provided to the control part to constitute a waste plastic vol. reducing apparatus. This apparatus can be arranged outdoors and is small-sized, lightweight and safe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste plastic volume reducing apparatus for heating and softening waste plastic materials such as expanded polystyrene generated in homes, offices, shops and the like to reduce the volume.

[0002]

2. Description of the Related Art Conventionally, a large amount of waste has been discharged from homes, business establishments, stores, and the like. Due to a shortage of processing facility capacity such as incineration and landfill, and an increase in processing costs including collection and transportation. The measures are urgent.

As a countermeasure, reducing the amount of waste discharged is a fundamental solution, but on the other hand, utilization of resources by recycling is extremely effective. Above all, waste plastic materials are attracting attention as a measure for recycling because the raw material is a precious energy resource such as petroleum, and it does not rot even when it is landfilled and is bulky. Among them, expanded polystyrene and PET bottles are frequently used as distribution containers because of their light weight, buffering properties, and low cost, and alternative materials have not been found so far. Its use is strongly desired.

Therefore, there is a method of collecting the expanded polystyrene, PET bottles, and the like, collecting them in one place, and melting them by heating to reduce the volume. However, in the case of recycling in this manner, there is a problem in that the transportation cost is increased due to the large bulk, which increases the overall recycling cost. Further, there is a problem that the facility becomes a large-scale facility and energy consumption during operation increases.

In order to solve the above problem, the following technology (Japanese Patent Laid-Open No. 6-60978) has been proposed. In this technology, high-frequency energy is supplied to a heating chamber provided with heating chamber wall heating means by a magnetron, and waste plastic material is heated and melted and recovered. It aims to realize relatively small-scale consumer facilities.

[0006]

However, the high-frequency heating apparatus described in Japanese Patent Application Laid-Open No. 6-60978 is
Although it could be used as a small-scale consumer facility, it could not be installed outdoors. This is because when the control unit is housed in the main unit for compactness, rainwater infiltrates from the gallery unit etc. provided in the main unit and wets the control unit, and the insulating properties of various electronic circuit components etc. provided in the control unit Has been degraded to cause a malfunction or malfunction. This problem,
Even if the control unit is not housed in the main body, the same occurs similarly through the outer frame of the control unit. In addition, various electronic components are provided in the control unit, and since these electronic components have a heat-generating effect, if they are simply sealed for waterproofing, the electronic components may malfunction or malfunction due to heat. was there.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and prevents entry of rainwater and the like, suppresses the temperature of the control unit from becoming high, and prevents malfunctions and malfunctions of the control unit. It is an object of the present invention to provide a small, lightweight, and safe waste plastic volume reducing device that can be installed outdoors.

[0008]

In order to achieve the above object, a waste plastic volume reducing apparatus according to the present invention comprises a processing container capable of softening waste plastic material therein, and a waste plastic provided in the processing container and having started softening. A pressurizing unit for pressurizing and reducing the volume of the material, a hot air circulation path for supplying a high-temperature gas for softening the waste plastic material to the processing container, and a control unit are housed in the main body, and the control unit is waterproof. A cover is provided, and heat transfer means for transmitting heat generated from the control unit to the outside of the waterproof cover is provided.

According to the present invention, waste plastic material can be effectively softened and pressurized and reduced in volume, and it is possible to prevent rainwater or the like from entering the control unit, and to prevent malfunction or malfunction due to heat generation in the control unit. To realize a waste plastic volume reduction device that can be installed outdoors such as in a private house or supermarket.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a processing container provided with an opening / closing lid and capable of softening waste plastic material inside, and a waste plastic provided at the bottom side of the processing container and having started softening. A pressurizing unit that pressurizes the material and reduces its volume;
A hot air circulation path that communicates with the processing container and circulates a high-temperature gas for softening the waste plastic material, and a control unit that performs control for reducing the volume of the waste plastic material are housed in the main body, and the control unit includes: Is a waste plastic volume reducing device provided with a waterproof cover and a heat transfer means for transmitting the heat generated from the control unit to the outside of the waterproof cover. The waste plastic material is softened and reduced in volume by pressing. In addition, it has the effect of preventing rainwater or the like from entering the control unit and causing insulation failure, and suppressing the temperature of the control unit from becoming high due to the heat generated by the electronic components used in the control unit.

According to a second aspect of the present invention, in the waste plastic volume reducing apparatus according to the first aspect, the heat transfer means is constituted by a heat pipe. It has the effect of transferring the heat of the section and effectively suppressing the control section from becoming hot.

According to a third aspect of the present invention, in the waste plastic volume reducing apparatus according to the first aspect, the waterproof cover is provided with cooling fins. Has an effect of easily dissipating heat and effectively suppressing the temperature of the control unit from becoming high.

According to a fourth aspect of the present invention, in the waste plastic volume reducing apparatus according to the first aspect, a cooling fan is provided in the vicinity of the control unit. The control unit is air-cooled by the fan, and has an effect of effectively preventing the control unit from becoming hot.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1A shows Embodiment 1 of the present invention.
1B is a side sectional view of a waste plastic volume reducing apparatus, and FIG. 1B is a side sectional view of a control unit provided with a heat transfer means of the waste plastic volume reducing apparatus.

1 (a) and 1 (b), reference numeral 1 denotes a main body of a waste plastic volume reducing device, in which a heat-resistant container 22 is provided.
A processing container 2 that is provided in the heat-resistant container 22 and accommodates the waste plastic material 28 and is softened by hot air at about 160 ° C .; and a processing container 2 that is provided at the inner bottom of the processing container 2 and pressurizes the waste plastic material 28. Pressurizing section 3 and hot air circulation path 1 for circulating hot gas into processing vessel 2
1 and a control unit 24 that is disposed outside the heat-resistant container 22 and controls the volume of the waste plastic material 28 to be reduced. The heat-resistant container 22 has a structure in which hot air does not leak out of the main body 1, and is suitably made of a material such as a polyamide-based plastic having excellent heat resistance.

Here, the size of the volume of the processing container 2 will be described. According to the survey, the waste plastic material 28 collected in stores such as supermarkets is mainly a styrofoam tray, and the average is about 400 sheets per day. If the collected trays are collected as they are, they will have a bulk of about 200 liters. Therefore, if the internal volume of the processing container 2 is set to a maximum of about 200 liters, the waste plastic material 28
It is not necessary to temporarily store in a separate container and then transfer it to a waste plastic volume reduction device, the processing container 2 itself can be used as a recovery container, and the volume reduction processing can be performed for one day. Therefore, 200 liters is used as a measure of the internal volume of the processing container 2. If the external dimensions of the processing container 2 are, for example, about 50 cm in width × 50 cm in depth × 80 cm in height, even if the processing container 2 is installed in a corner of a store such as a supermarket, the processing container 2 does not become a hindrance to shoppers and can be easily shopped. And the recovery rate of the waste plastic material 28 can be increased.

The power consumption required for heating the hot air may be as low as about 1.4 Kw, and if most of the main body 1 is made of a heat-resistant polyamide-based plastic or the like, the weight can be reduced to about 15 kg. Since it can be reduced, it is easy to carry, and the inside of the processing container 2 is easily cleaned, so that the processing container 2 can always be kept clean. Furthermore, since the amount of waste plastic material 28 collected in one day can be reduced on that day,
It is possible to prevent foods and the like adhering to the tray or the like that have been left in the collection container for a long period of time from rotting and releasing odors, and can prevent pests such as flies from gathering.

On the side surface of the processing container 2, an appropriate number of side outlets 18 for hot air are provided, and on the upper surface thereof, an opening / closing lid 6 provided with an O-ring elastic body 5 is provided. The opening / closing lid 6 is opened when the waste plastic material 28 is charged into the processing container 2, and is closed and closed when performing volume reduction processing in the processing container 2.

Further, the pressurizing section 3 is vertically movable and is provided on the bottom side of the processing vessel 2, and sandwiches the waste plastic material 28, which has been softened by a high-temperature gas of about 160 ° C., between the open / close lid 6. To reduce the volume. The pressurizing section 3 includes a pressurizing actuator 4 and a piston 25 which is reciprocated by the pressurizing actuator 4 and directly presses the waste plastic material 28.

The pressurizing actuator 4 is an elastic balloon-shaped air bag or the like, which is expanded and contracted by air fed from an air pump 21 to push up a piston 25 to reduce the volume of the waste plastic material 28, and then to adjust the pressure. The valve 13 is opened to discharge the air accumulated therein, and the pressurizing unit 3 returns to the original position. At the time of volume reduction, the waste plastic material 28 does not leak outside due to the O-ring-shaped elastic body 5. The air pressure sent at this time is 0.1 kg / cm
^As long as it is about ² , for example, the area of the piston 25 is 1
If it is 000 cm ² , a pressing force of about 100 kg can be obtained. As described above, the structure of the pressurizing section is relatively simple, and the exhaust capacity of the air pump 21 may be small.
It can be installed in stores such as supermarkets because of its light weight and low noise.

Reference numeral 7 denotes a blower, which has a blowing capacity of about 500 liters / minute, and is provided in a hot air circulation path 11 connected to the processing vessel 2 to circulate high-temperature gas through the processing vessel 2. The hot air circulation path 11 is provided with a heating section 8 which is an electric heater for heating the circulating gas, and a temperature sensor 9 near the hot air discharge port 10 of the hot air circulation path 11. The controller 2 controls the temperature of the hot gas detected by the temperature sensor 9.
The temperature of the high-temperature gas is adjusted to a temperature range of about 160 ° C. by controlling the power supplied to the heating unit 8 and switching the power supplied to the heating unit 8 by switching a switch circuit or the like.

Reference numeral 12 denotes a discharge passage, one end of which is provided to be branched to the hot air circulation passage 11, and a part of the circulating high-temperature gas is branched and discharged to the outside as exhaust gas. When the waste plastic material 28 is styrene foam, the exhaust gas contains several thousand ppm of a foaming gas such as butane, toluene, and xylene, and a combustible gas such as a styrene monomer gas vaporized during the volume reduction treatment. The flammable concentration of these flammable gases is 15000 ppm or more, and the exhaust gas does not burn in the processing vessel 2 in the ordinary volume reduction processing.

The exhaust passage 12 is provided with an oxidizing section 14 for oxidizing the exhaust gas to be emitted and performing flameless combustion. The oxidizing section 14 is provided with an oxidizing catalyst 15 for promoting the oxidation of the exhaust gas heated by the catalyst heating section 16 and a processing gas temperature sensor 17 for detecting a discharge temperature of gas exhausted by the oxidizing treatment. The oxidation catalyst 15 is, for example, a platinum-containing compound supported on a mullite ceramic containing aluminum oxide, silicon oxide or the like as a main component. The processing gas that has been smokelessly burned by the oxidation catalyst 15 is exhausted from the processing gas exhaust port 20 to the outside of the system via the exhaust path 12.

Reference numeral 23 denotes an air suction port provided in the heat-resistant container 22, and constantly sucks air from outside during hot air circulation. The amount of the inhaled air and the amount of the processing gas discharged from the exhaust path 12 are balanced, thereby preventing the flammable gas in the main body 1 from becoming too high in concentration as described later. it can.

The control section 24 controls the operation for reducing the volume of the waste plastic volume reducing apparatus, and controls the temperature of the circulating high-temperature gas, the amount of circulating air, the pressure of the air supplied into the pressurizing section 3, and the like. Control. The control unit 24 is provided on a support 33 on the base 26 in the main body 1. The control unit 2
4 will be described later in detail. By doing so, the waste plastic volume reducing device can be made compact, and it can be installed outdoors such as in a private house or a supermarket to perform volume reduction processing. It is appropriate that the attachment position is provided at a lower portion of the main body 1. The reason is that in the main body 1, heat sources such as the oxidizing section 14 and the heating section 8 are additionally provided, and the air in the main body 1 is heated by these and rises to increase the temperature of the upper part. This is because heat of the control unit 24 is hindered.

Reference numeral 27 denotes a gallery for radiating heat generated in the main body 1 to the outside of the system, and is provided above the main body 1 for the above-described reason.

In the figure, 11a is a hot air circulation port, 12a is a discharge port, 19 is a gas flow path, and 36 is an electric / electronic component.

The operation of the waste plastic volume reducing device configured as described above will be described below with reference to FIG. The lid 6 is opened, and the waste plastic material 28 is put into the processing container 2. Next, the opening / closing lid 6 is closed, and the control unit 2 is closed.
Under the control from 4, the blower 7 is energized to start blowing, and then the heating unit 8 is energized to heat the circulating gas to a high-temperature gas. The heating temperature at this time is about 160 ° C,
The temperature sensor 9 detects this, transmits a detection signal to the control unit 24, and is controlled so as to maintain a predetermined temperature.

The high-temperature gas becomes hot air and is discharged from the hot-air discharge port 10 into the processing container 2 as shown by an arrow b, and the waste plastic material 28 charged into the processing container 2 is heated and softened. Next, the high-temperature gas is discharged from the side discharge port 18 as shown by the arrow c, flows through the gas flow path 19 formed between the heat-resistant container 2 and the outer surface side thereof, reaches the intake port of the blower 7, and moves to the arrow d. As shown, the hot air is circulated through the hot air circulation path 11.
When the waste plastic material 28 in the processing container 2 is heated by the high-temperature gas, the apparent bulk occupied by the waste plastic material 28 is reduced, and the volume is reduced. That is, when heated, the waste plastic material 28 contracts while substantially maintaining its original shape, significantly reduces its bulk, and starts softening from a portion that is easily softened, thereby reducing its volume. Then, in order to further reduce the volume and increase the volume reduction rate, the material is compressed by the pressurizing section 3 while heating with a high-temperature gas, together with the start of softening. However, in the case of a PET bottle or the like, if heating proceeds too much, it crystallizes and becomes harder, so it is necessary to finish pressurizing by then.

When the pressure control valve 13 is closed and the air pump 21 is operated, the pressurized actuator 4 comprising an air bag or the like is operated.
, The piston 25 moves as indicated by the arrow g, and compresses the waste plastic material 28 in the processing container 2 between the open / close lid 6 to reduce the volume. The waste plastic material 28 whose volume has been reduced and its volume has been reduced is collected, collected for several days, collected and recycled by a collection company or the like.

Here, the control unit 24 in the first embodiment
Will be described. The control unit 24 is composed of electric and electronic circuits composed of various electric components such as a power transformer and various electronic components (hereinafter referred to as electric / electronic components) such as semiconductor devices. These electric and electronic components generate heat during energization and increase the temperature inside the control unit 24. This temperature rises to about 50 ° C. even when the control unit 24 is provided in a place where heat is easily radiated, and 70 to 80 ° C. when the surrounding temperature is higher than the temperature of the control unit 24.
Reach to the extent. At this temperature, electronic components such as microcomputers exceed the temperature range of their normal functions, which may cause malfunctions.

Therefore, in the first embodiment, the control unit 24
Is provided at a lower portion in the main body 1 which is considered to have a relatively low room temperature, so that the influence of heat is reduced as much as possible. However, when the control section 24 is installed outdoors with the waste plastic volume reducing device provided in the lower portion inside the main body 1, moisture such as rainwater easily enters the main body 1, and the water enters the control section 24. Become. In particular, in the past, a heat radiating port is often provided in the control unit to radiate heat. In this case, a large amount of moisture enters through the heat radiating port. Moisture that has entered the control unit 24 may cause an electrical or electronic circuit to have insulation failure and cause a short circuit. At this time, a malfunction or malfunction may occur. Therefore, when the control unit 24 is provided in the main body 1, it is possible to prevent intrusion of moisture from the outside and to control the control unit 2.
It is necessary to easily dissipate the heat inside 4 to prevent malfunctions and malfunctions.

Here, the structure of the control unit 24 is shown in FIG.
Description will be made based on (b). In FIG. 1B, 38
Is a waterproof cover, a cover 24a made of a metal plate or the like coated with a water-resistant paint to a required thickness, a water-resistant plastic film sheet of an appropriate thickness, or S
It is only the cover 24a of US or the like. It is preferable to use a structure that can completely cover the control unit 24 from above.
The entry of moisture such as rainwater can be prevented by the cover 24a. The waterproof cover 38 preferably has good thermal conductivity and can transmit heat transmitted by the heat transfer means 29 described later to the outside. The electric / electronic components 36 are mounted on the circuit board 31. The heat transfer means 29 transfers the heat radiated by the electric / electronic component 36 through the circuit board 31 and transfers the heat to the waterproof cover 38.

In the first embodiment, the bottom surface of the control unit 24 is constituted by the heat transfer means 29, and the waterproof cover 38 is provided so as to cover the heat transfer means 29. Here, by interposing a silicon film or the like between the heat transfer means 29 and the circuit board 31, the insulation between the heat transfer means 29 and the circuit board 31 can be improved. In the first embodiment, the heat transfer means 29 is made of a metal or the like having good heat conductivity in a plate shape so that the contact area with the circuit board 31 can be increased.

When the operation of reducing the volume of the waste plastic material 28 is started, the electric / electronic parts 36 provided in the control unit 24 start to generate heat. Since the electric / electronic component 36 is mounted on the circuit board 31, heat is also transmitted to the circuit board 31. The circuit board 31 is made of a heat transfer means 2 made of a metal such as brass, copper, or aluminum having good heat conductivity and made into a flat plate shape.
9, the heat of the circuit board 31 is easily transferred. Since the side and bottom surfaces of the heat transfer means 29 are in close contact with the waterproof cover 38, the transferred heat is transferred to the waterproof cover 38, and the transferred heat is transferred from the surface of the waterproof cover 38 to the control unit 24. Released to the periphery. In this way, it is possible to suppress an increase in the temperature of the control unit 24.

In the first embodiment, using a waste plastic volume reducing device in which the inner volume of the processing vessel 2 is 200 liters and reducing the volume of about 400 styrofoam trays requires approximately 1.4 Kw of electric power. Consumed. At this time, the temperature when the heat transfer means 29 is not provided in the control unit 24 is about 70
° C, but when the brass heat transfer means 29 according to the first embodiment was provided, the temperature could be suppressed to about 40 ° C.

As described above, the waterproof cover 38 is provided in close contact with the control unit 24, and the electric / electronic component 3 is attached to the waterproof cover 38.
6, the heat accumulated in the sealed control unit 24 can be radiated to the outside by providing the heat transfer means 29 for transferring the radiated heat of the electric / electronic component 36, and the electric / electronic component 36 malfunctions due to the heating. And malfunctions can be prevented.

(Embodiment 2) FIG. 2 is a side sectional view of a control unit in a waste plastic volume reducing apparatus according to Embodiment 2 of the present invention. Note that, in FIG. 1 (a),
The same components as those shown in (b) indicate the same components, and the description is omitted here.

The features of the second embodiment are as follows.
The heat transfer means 29 is constituted by a heat pipe. In FIG. 2, reference numeral 34 denotes a heat pipe, which includes a heat receiving portion 34a and a heat radiating portion 34b, and is filled with water or the like as a working fluid 35 therein. The heat receiving portion 34a is made of aluminum or the like, and the heat radiating portion 34b is made of brass or the like, both of which have good heat conductivity.

When the heat radiated by the electric / electronic component 36 is transmitted to the heat receiving portion 34a via the circuit board 31, the working fluid 35
Is heated, the specific gravity becomes light, and reaches the vicinity of the heat radiating portion 34b. The heat of the working fluid 35 that has reached the vicinity of the heat radiating portion 34b radiates to the surroundings and lowers the temperature. Working fluid 35 whose temperature has dropped
The specific gravity is increased and returned to the heat receiving portion 34a again, and the heat radiated by the electric / electronic component 36 is transferred to lower the temperature of the control portion 24.

Here, when the volume was reduced under the same conditions as in the first embodiment, when the heat transfer means 29 according to the second embodiment was provided, the temperature could be suppressed to about 35 ° C.

(Embodiment 3) FIG. 3 is a side sectional view of a control unit in a waste plastic volume reducing apparatus according to Embodiment 3 of the present invention. In addition, the code | symbol attached to FIG.
The same components as those shown in (b) indicate the same components, and the description is omitted here.

The features of the third embodiment are as follows.
The cooling fin is provided on the waterproof cover 38 of the control unit 24. In FIG. 3, reference numeral 32 denotes a cooling fin, which is provided at a plurality of locations on a waterproof cover 38 provided on the control unit 24.
The material of the cooling fins 32 is preferably made of a metal having excellent thermal conductivity such as copper.

The heat released from the electric / electronic parts 36 in the control unit 24 is transferred to the circuit board 31, and the heat is
9 to the waterproof cover 38. Waterproof cover 3
8 transferred to the control unit 24 by the cooling fins 32.
The heat is radiated outside. In this way, a rise in the temperature of the control unit 24 can be suppressed.

Although the heat transfer means 29 and the cooling fins 32 are provided here, the heat accumulated in the control unit 24 can be radiated even if only the cooling fins 32 are provided. In this case, the heat accumulated in the control unit 24 is
Is transferred directly to the outside, and is radiated to the outside by the cooling fins 32.

Here, when the volume was reduced under the same conditions as in the first embodiment, when the heat transfer means 29 according to the third embodiment was provided, the temperature could be suppressed to about 40 ° C.

(Embodiment 4) FIG. 4 is a side sectional view of a cooling fan and a control unit in a waste plastic volume reducing apparatus according to Embodiment 4 of the present invention. 1A and 1B denote the same components, and a description thereof will be omitted.

The features of the fourth embodiment are as follows.
This is because a cooling fan is provided near the control unit 24 to perform air cooling. In FIG. 4, reference numeral 37 denotes a cooling fan, which is provided in the lower part of the main body 1 near the control unit 24.

Here, the heat generated in the control section 24 is transferred to the heat transfer means 29 and transferred to the waterproof cover 38. At this time, when the temperature of the surrounding area is lower than the temperature of the waterproof cover 38, heat is radiated, and the temperature of the control unit 24 can be kept low. Then, if heat is accumulated in the main body 1 due to long-time operation or the like and the ambient atmosphere temperature becomes high, the air outside the main body 1 can be blown by the cooling fan 37 to be forcibly cooled. The air whose temperature has risen due to the heat of the control unit 24 is released to the outside together with the high-temperature air in the main body 1 from the gallery unit 27 provided at the upper part of the main body 1.

Here, when the volume reduction process is performed under the same conditions as in the first embodiment, when the heat transfer means 29 and the cooling fan 37 according to the fourth embodiment are provided, the temperature is reduced to 35 ° C. or less. Was completed.

[0051]

As is apparent from the above description, the waste plastic volume reducing apparatus according to the present invention comprises a pressurizing section provided at the bottom side of the processing vessel to pressurize and reduce the volume of the softened waste plastic material. A hot air circulation path that communicates with the processing container and circulates high-temperature gas for softening waste plastic material, and a control unit that controls volume reduction of waste plastic material are housed in the main body. And the provision of the heat transfer means for transmitting the heat generated in the control unit to the outside of the waterproof cover, it is possible to prevent operation failure and malfunction of the control unit.

Further, since the heat transfer means comprises a heat pipe, there is an effect that heat generated in the control section can be easily absorbed and radiated.

The provision of the cooling fins on the waterproof cover has the effect that the heat of the control section can be effectively released to the outside.

The provision of the cooling fan in the vicinity of the control unit has an effect that the temperature of the control unit can be further reduced.

[Brief description of the drawings]

FIG. 1A is a side sectional view of a waste plastic volume reducing apparatus according to Embodiment 1 of the present invention, and FIG. 1B is a side sectional view of a control unit in the waste plastic volume reducing apparatus.

FIG. 2 is a side sectional view of a control unit in the waste plastic volume reducing device according to the second embodiment of the present invention.

FIG. 3 is a side sectional view of a control unit in the waste plastic volume reducing apparatus according to the third embodiment of the present invention.

FIG. 4 is a side sectional view of a cooling fan and a control unit in a waste plastic volume reducing device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Processing container 3 Pressurizing part 4 Pressurizing actuator 5 O-ring elastic body 6 Opening / closing lid 7 Blower 8 Heating part 9 Temperature sensor 10 Hot air discharge port 11 Hot air circulation path 11a Hot air circulation port 12 Discharge path 12a Discharge port 13 Pressure Control valve 14 Oxidation unit 15 Oxidation catalyst 16 Catalyst heating unit 17 Processing gas temperature sensor 18 Side discharge port 19 Gas flow path 20 Processing gas exhaust port 21 Air pump 22 Heat resistant container 23 Air suction port 24 Control unit 24a Cover 25 Piston 26 Base 27 Gallery section 28 Waste plastic material 29 Heat transfer means 31 Circuit board 32 Cooling fin 33 Support base 34 Heat pipe 34a Heat receiving section 34b Heat radiating section 35 Working fluid 36 Electric / electronic parts 37 Cooling fan 38 Waterproof cover

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuyuki Ikata 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] A processing container provided with an opening / closing lid and capable of softening waste plastic material therein; a pressurizing unit provided on a bottom side of the processing container for pressurizing and reducing the volume of the softened waste plastic material; A hot air circulation path communicating with the processing container and circulating a high-temperature gas for softening the waste plastic material, and a control unit for controlling volume reduction of the waste plastic material are housed in the main body, and the control unit includes A waste plastic volume reducing device comprising a waterproof cover and a heat transfer means for transmitting heat generated from the control unit to the outside of the waterproof cover. 2. The waste plastic volume reducing apparatus according to claim 1, wherein the heat transfer means comprises a heat pipe. 3. The waste plastic volume reducing device according to claim 1, wherein cooling fins are provided on the waterproof cover. 4. The waste plastic volume reducing device according to claim 1, wherein a cooling fan is provided near the control unit.