JPH07290029A - Garbage disposal machine - Google Patents

Abstract

PURPOSE:To uniformly heat the large area of the treating tank at low temps. in a garbage disposal machine to aerobically decompose the garbage by making the treating tank from a polyolefin resin, sticking a surface cord heater to the periphery of the treating tank and covering the heater with a flame- retardant foamed sheet. CONSTITUTION:A culture medium and aerobes are placed in the treating tank 1 having an impeller 2 and a ventilator, and garbage is charged into the tank and agitated in the garbage disposal machine. The treating tank 1 with a shape having the arc more than the semicircle is made from a polyolefin resin such as PP and PE difficult to thermally deform and excellent in formability, and a surface cord heater 40 is stuck to the periphery surface of the tank 1 over a wide area and covered with a flame-retardant foamed sheet 50 for heat insulation, flametightness and extinction of fire. Consequently, the tank is widely heated, the supply of power to the heater 40 is controlled in accordance with the external air temp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a garbage disposal machine (hereinafter referred to as a garbage disposal machine) of a type in which kitchen garbage generated in a kitchen of a general household (hereinafter referred to as kitchen garbage) is decomposed and reduced using aerobic bacteria. Called)).

[0002]

2. Description of the Related Art Techniques for decomposing kitchen garbage (hereinafter referred to as garbage) by utilizing aerobic bacteria and reducing the amount thereof are disclosed in, for example, Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 4-4084.

In this food waste disposing machine, a culture substrate (herein referred to as a microbial implantation agent) is put in a processing tank having a stirring blade and a ventilation device, and the crushed food waste is put into the processing tank through a shredder. , A method of stirring a culture substrate and food waste is shown.

[0004]

However, one of the drawbacks of the above-mentioned food waste disposer is that the temperature of the outside air decreases depending on the season.
When the temperature is lower than ℃, the activity of bacteria is remarkably reduced and the decomposition of food waste becomes worse. As a countermeasure against this, heating with a heater can be considered, but in the conventional heater, since the heat conduction of the internal base material is poor, the bacteria are killed by being locally heated, the moisture content of the base material is extremely lowered, and smoke is generated. There was a defect that the processing tank was deformed. Further, there is no means for sterilizing or drying when the water content of the base material becomes high or before replacing the old base material.

The object of the present invention is to overcome the above-mentioned drawbacks of the prior art.

[0006]

[Means for Solving the Problems] The above object is to dispose of a culture substrate and aerobic bacteria in a treatment tank having a stirring blade and a ventilation device, and throw garbage into the raw garbage processing machine. In the above, a processing tank having a shape with an arc of approximately a semicircle or more is provided with a rotating shaft at the center of the arc, and stirring blades are fixed to this shaft to rotate and stir, and this processing tank is thermally deformed. Molded with a polyolefin resin such as polypropylene PP or polyethylene PE that is difficult to do, and a planar cord heater is adhered to the outer peripheral surface over a large area. The planar cord heater is a flame-retardant foam for the purpose of heat retention and flame prevention. It is possible to achieve this by covering with the above, heating from a wide surface of the processing tank, setting an optimum temperature by a temperature control mechanism, and controlling the energization time.

[0007]

According to the present invention, a culture substrate for sawdust or the like in a treatment tank, a food waste disposing machine for stirring aerobic bacteria and food waste with a stirring blade, contains a substrate having extremely poor heat transfer inside. In spite of this, since the wide area of the processing tank can be uniformly heated at a relatively low temperature by the planar cord heater, the above-mentioned drawbacks can be solved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view for explaining the principle of the food waste disposer of the present invention, and FIG. 2 is a cross-sectional view of essential parts thereof. FIG. 3 shows a sectional view taken along the line AA in FIG. FIG. 4 is a cross-sectional view showing the configuration of the planar cord heater.

Reference numeral 1 denotes a food waste treatment tank having a stirring blade 2 in the center, and a culture substrate 3 is contained therein. The culture substrate is sawdust, rice husk, etc. whose main component is fibrin that is difficult to biodegrade, such as lignin and cellulose, and each grain is porous, has water absorption and voids, and has a complicated grain shape, A large void is formed in the.

A shaft 4 of the stirring blade 2 is rotated by a driving motor 5 via a transmission mechanism 6 such as a chain or a belt. A ventilation fan 10 and an intake port 1 are provided above the processing tank 1.
1, an exhaust port 12 is provided, and by rotating the fan 10, fresh air is sucked into the processing tank through the intake port 11,
The gas in the processing tank is discharged to the outside of the machine through the exhaust port 12.
A filter is attached to each of the intake port 11 and the exhaust port 12.

A discharge port 15 for the contents is provided at the bottom of the processing tank 1 and is normally shielded by an outlet cover 16 having a 16a and a drawer type shutter 17. Take 1
6a, place the hand on 6a, remove the outlet cover 16, and release the shutter 17
When the container is pulled out, the contents of the processing tank 1 fall into the discharge passage 18 from the discharge port 15, so that the contents can be taken out of the machine simply by scraping.

Numeral 20 is an input port for garbage into the processing tank 1, and an outer lid 2
1, the inner lid 22 is doubly covered.

A door switch (not shown) is provided on the outer lid 21.
When the outer lid 21 is opened to a certain angle, a door switch (not shown) is opened to turn off the power of the motor 5 and stop the stirring blade 2. Outer lid 21
Even if the door switch is turned off to turn off the power of the motor 5, the motor 5 does not stop immediately because of inertia. However, even if the operator puts his / her hand in a hurry, since the inner lid 22 is present, the rotating stirring blade 2
It has a safe structure that will not be injured when you touch it.

Here, the sectional shape of the treatment tank 1 is the culture substrate 3
As shown in FIG. 2, the whole is uniformly U-shaped with an arc portion of a semicircle or more so as to be uniformly stirred with a light action. The rotating shaft 4 is provided so as to coincide with the center of the arc of the arc portion. A plurality of stirring blades 2 are fixed to the rotating shaft 4.

The tip 30 of the stirring blade 2 is shown in FIGS.
As shown in FIG. 3, the arc is substantially concentric with the arc of the processing tank 1 so that a small gap within 20 mm from the arc of the processing tank 1 can be formed. As a result, the base material 3 clinging to the inner peripheral wall surface of the processing tank 1 is also scraped off, so that uniform stirring without unevenness is performed.

Further, in the present invention, the stirring blade 2 is not rotated in one direction but is repeatedly rotated in the normal direction--pause--reverse rotation. By stirring the base material intricately, uniform stirring can be achieved without a group and the blades can be stirred. Even if a foreign object is entangled in it, it will come off during reverse rotation.

In the present invention, the processing tub 1 is formed of a polyolefin resin such as polypropylene PP or polyethylene PE which is widely used in a washing tub of a washing machine and is not easily deformed by heat and has good moldability. The planar cord heater 40 is adhered over a wide area. In addition, a flame retardant foam sheet 5 is used to retain heat to suppress heat dissipation and improve thermal efficiency, and to prevent fire and to extinguish fire should it occur.
Covered with 0. As shown in FIG. 4, the planar cord heater 40 has a heating wire 41 wound in a thin coil shape and spirally wound around the outer periphery of a cord 42 of a tetron around a core, and is coated with an insulating film 43 on the cord to form a cord. The thus-obtained material is adhered so as to crawl on the aluminum sheet 44. The heat generation temperature can be monitored by a thermistor (not shown), and the heat generation temperature can be maintained at a predetermined set value by the temperature control mechanism. The processing tank 1 contains a base material such as sawdust having extremely poor heat conduction,
Although it was difficult to heat this uniformly, it is possible to heat it evenly by sticking this planar cord heater 40 over a wide area.

The control temperature of the sheet cord heater 40 is such that the temperature of the portion of the processing tank 1 to which the sheet cord heater 40 is adhered will kill the bacteria even if there is some local variation. An appropriate temperature is set within 25 ° C to 40 ° C at which the activity of the bacterium does not rise and the temperature is not higher than ℃. Then, in order to keep the temperature of the base material in the processing tank against the change of the outside air temperature, the energization time of the planar cord heater is controlled. That is, when the outside air temperature is low, the current is continuously supplied, and when the outside air temperature is high, the current is supplied at an interrupted rate to appropriately adjust the temperature of the base material. Further, by selecting the combination of the energization time of the intermittent energization and the rest time depending on the temperature of the outside air, it is possible to control the temperature with a fine texture.

Further, even if the temperature control mechanism of the planar cord heater 40 fails and temperature control becomes impossible, the heat generation temperature thereof is designed not to exceed the thermal deformation temperature of the processing tank 1. This is obtained by appropriately balancing the heat generation amount and the heat radiation amount per unit area. This ensures the safety of the device.

This method of controlling the substrate temperature by adjusting the energization time of the planar cord heater has the advantages of simple control, high productivity and high reliability.

When the moisture content of the base material has risen, the planar cord heater is operated for a certain period of time regardless of the outside air temperature.
A dehumidification cycle is provided in which the water content of the base material is evaporated by continuous energization to reduce the water content.

Furthermore, when the base material has reached the end of its life and when all the old base material is taken out, the old base material is sterilized by continuously energizing it for a certain period of time at a high temperature of 60 ° C. or higher, which is the maximum temperature that does not cause thermal deformation of the processing tank. In addition, it has a cycle before base material exchange that makes it easy to dry and dry.

[0023]

EFFECTS OF THE INVENTION According to the present invention, in a food waste disposer having a stirring blade that uses a culture substrate such as aerobic bacteria and sawdust, the processing tank has a heat-resistant polyolefin-based material such as PP that is resistant to thermal deformation. Molded with resin, bonded with a planar cord heater over a wide range of its outer peripheral surface, covered with a flame-retardant foam sheet, and heating the base material from a large area at a relatively low temperature, thereby combining with the stirring process. The entire substrate can be maintained at a substantially uniform temperature. As a result, the bacteria around the heater will die at high temperature as in the past,
It is possible to prevent accidents such as the fact that the water content of the base material is partially reduced to cause smoking, the decomposition efficiency of food waste is reduced, and the treatment tank is thermally deformed. Further, by optimally controlling the control temperature by the temperature control mechanism in accordance with the outside air temperature or the ambient temperature and humidity in the processing tank, it is possible to always achieve highly efficient food waste processing with less odor. Moreover, since the heating can be efficiently performed in a large area, the power consumption of the heater can be extremely small.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a food waste processing machine that is an embodiment of the present invention.

FIG. 2 is a vertical sectional view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a configuration of a planar cord heater.

[Explanation of symbols]

1 ... Garbage treatment tank, 2 ... Stirring blade, 3 ... Culture substrate, 4 ...
Rotating shaft, 5 ... Motor, 21 ... Outer lid, 22 ... Inner lid, 30 ...
Tip of agitating blade, 40 ... Planar cord heater, 50 ... Flame-retardant foam sheet.

Front page continuation (72) Kenichi Hamada Inventor Kenichi Hamada 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hiritsu Taga Technology Co., Ltd.

Claims (6)

[Claims] 1. A culture medium and aerobic bacteria are placed in a treatment tank having a stirring blade, and garbage such as cooking scraps and leftover food is put into the treatment tank and stirred together, whereby the aerobic bacteria work. In a food waste disposer that decomposes waste, the processing tank is a molded product of polyolefin resin, and a planar cord heater is bonded over a wide area on the outer peripheral surface of the processing tank. A food waste disposer characterized by being covered with a foam sheet. 2. The flat cord heater according to claim 1, further comprising a temperature control mechanism for the planar cord heater, wherein the temperature controlled by the temperature control mechanism is set to a temperature of about 30 ° C., and the planar cord heater is continuously operated by the outside air temperature. A food waste disposer characterized in that the temperature of the base material in the processing tank is maintained at an optimum temperature by selectively controlling which of the two is intermittently energized. 3. The food waste disposer according to claim 2, wherein the temperature control mechanism energizes the sheet-shaped cord heater continuously at low temperature and intermittently at high temperature. 4. The surface temperature of the base material can be maintained appropriately by selectively adjusting the combination of the energization time and the dwell time of the intermittent energization of the planar cord heater with respect to the outside air temperature. Garbage disposal machine characterized by. 5. A dehumidification cycle according to claim 1, wherein when the moisture content of the substrate exceeds a specified level, the planar cord heater is continuously energized for a fixed time regardless of the outside air temperature. A garbage processor that does. 6. The method according to claim 1, wherein the temperature control mechanism of the planar cord heater is set to a high temperature of 60 ° C. or higher for a certain period of time before the base material reaches the end of its life and is replaced with an old one. A food waste disposer characterized by having a cycle before base material exchange that measures sterilization and drying of old base materials by continuously energizing them.