JPH09248546A - Disposal system for garbage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compensate a measured value of water content based on both 0% water content when a decomposition material and garbage are not present in a treating tank and planned theoretical water content to predetermine exact water content, and to enable to definitely perform fermentation of the garbage. SOLUTION: Based on both a 0% measured vale by a water content sensor consisting of both a heating device 18 and a heated temp., detection device 17 when sawdust being the decomposition material and the garbage are not present in the treating tank 1 and the planned theoretical water content a measured value of the water content in the treating tank in which the decomposition material and the garbage in the treating tank are present, is compensated, and based on this compensated water content, an agitation motor 10, a heater 11 and a fun 13 are driven and controlled with a water content control part 5 so as to become optimized water content, thus the garbage is efficiently fermented and decomposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food waste processing apparatus for fermenting and decomposing food waste discharged from, for example, a kitchen at home.

[0002]

2. Description of the Related Art This type of food waste processing apparatus is very effective in processing food waste discharged from a kitchen or the like at home, and it has been a problem in recent years to dispose of garbage. It has been receiving attention.

[0003] In a food waste processing device, a large amount of sawdust, which is a decomposing material or a medium for food waste, is placed in a processing tank for fermenting and decomposing food waste, and the food waste is put into the processing tank containing the sawdust. After that, the raw garbage is aerobically fermented and decomposed by stirring and mixing it.

In order to efficiently perform the fermentation decomposition of raw garbage in such a raw garbage treating apparatus, it is very important that the sawdust contained in the treatment tank contains an appropriate amount of water. is there.

Therefore, the food waste processing apparatus is provided with a water content sensor for measuring the water content of sawdust, that is, the water content, and the water content sensor detects the water content in the processing tank. The sawdust and food waste in the processing tank are agitated and mixed so that the waste can be efficiently fermented and decomposed.

[0006]

The conventional moisture content sensor is mounted so as to contact the outer wall of the processing tank, which heats the sawdust in the processing tank and raises the temperature of the sawdust. The moisture content is detected based on the heating time and the temperature.In this case, the moisture content detected by the moisture content sensor is the contact state in which the moisture content sensor is attached to the processing tank,
There is a problem in that the moisture content sensor lacks accuracy due to being affected by the heat insulation state for insulating the moisture content sensor from the outside air, the variation of the components forming the moisture content sensor, and the like.

[0007] The present invention has been made in view of the above,
The purpose is to correct the moisture content measurement value based on the design theoretical moisture content and 0% moisture content when the processing tank does not contain decomposed material and food waste to obtain an accurate moisture content. An object of the present invention is to provide an apparatus for treating food waste, which can be calculated and accurately perform fermentation decomposition of food waste.

[0008]

In order to achieve the above object, the present invention according to claim 1 ferments raw garbage by introducing the raw garbage into a treatment tank containing a decomposing material and stirring and mixing the raw garbage. A food waste processing device for decomposing, wherein a water content detecting means for detecting the water content in the processing tank and the water content in the processing tank when the decomposed material and the garbage are not contained in the processing tank 0% measured value detecting means for setting and controlling so as to detect as a 0% measured value by the rate measuring means, and water content in the processing tank when decomposing material and garbage are contained in the processing tank. A moisture content measurement value detecting means for setting and controlling so as to detect as a moisture content measurement value by means,
Correcting means for correcting the measured moisture content value based on the designed theoretical moisture content of the moisture content in the treatment tank and the 0% measured value when the decomposed material and the garbage are not contained in the treatment tank. Having it is the gist.

According to the first aspect of the present invention, when the decomposed material and the garbage are not contained in the processing tank, the decomposition is carried out in the processing tank based on the measured value of 0% and the designed theoretical moisture content. The moisture content measurement value in the processing tank when wood and garbage are contained is corrected.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional side view showing the overall construction of a food waste processing apparatus according to an embodiment of the present invention.
The food waste processing device shown in the figure has an input door 6 for inputting food waste at the uppermost part, and a processing tank 1 is provided below an input port 5 closed by the input door 6. There is.
The processing tank 1 is made of a material having a low thermal conductivity, and is made of, for example, stainless steel or polymer resin. The processing tank 1 contains a large amount of sawdust 14 as a decomposing material or medium.

Further, a stirring blade 15 for stirring the sawdust 14 charged with raw garbage is provided substantially in the center of the processing tank 1, and the stirring blade 15 is rotationally driven by a stirring motor 10 via a chain 31. , This allows sawdust 1
4 is to be stirred.

Further, a discharge door 8 is provided at the bottom of the processing tank 1. A discharge box 9 is arranged further below the discharge door 8, and a front door 7 for taking out the discharge box 9 is provided in front of the discharge box 9.

A heater 11 is attached to the lower side of the bottom of the processing tank 1 on the side opposite to the discharge door 8 and the sawdust 14 inside the processing tank 1 is provided by the heater 11.
And it is designed to heat food waste. Further, a ventilation fan 13 is attached to the rear portion of the food waste processing device near the upper side.

FIG. 2 (a) is a front view of a portion of the processing tank 1 provided in the food waste processing apparatus shown in FIG. 1, taken from the front side. 8 looks like a rectangle from the front. As shown in the figure, a large amount of sawdust 14 is put in the processing tank 1, and the uppermost part of the sawdust 14 is an air contact surface 26 that comes into contact with air.

In FIG. 2 (a), two mounting fittings 21 are mounted from the outer side with a gap at approximately the center of the left wall portion of the processing tank 1, and the outer side of the wall portion between the mounting fittings 21. Constitutes the joint portion 24, the inside constitutes the contact portion 25,
The contact portion 25 is in direct contact with the sawdust 14 in the processing tank 1.

The heating temperature detecting device 1 is attached to the joint portion 24.
7 and a heating device 18, and a detection block portion 16 constituting a moisture content sensor is attached, and the detection block portion 16 is further attached with a heat insulating portion 19 from the outside.
The mounting portion 20 is further mounted to the heat insulating portion 19 from the outside, but in the same figure, the detection block portion 16, the heat insulating portion 19, and the mounting portion 20 are shown to facilitate the description. It is shown removed and disassembled.

Heating temperature detecting device 17 and heating device 18
The detection block portion 16 that is made up of the water content sensor is attached so as to directly contact the joint portion 24, as shown in FIG. In the figure, the joint portion 24 and the contact portion 25 are defined as the joint contact portion 27.

As shown in FIG. 2B, the detection block section 16 is directly attached to the joint contact section 27 so that the heat from the heating device 18 passes through the joint contact section 27.
The heat is efficiently transmitted to the sawdust 14 therein, so that the sawdust 14 is heated, and the heat, that is, the temperature of the sawdust 14 can be accurately detected by the heating temperature detecting device 17.

As shown in FIG. 2B, after the detection block portion 16 is attached to the joining contact portion 27, the heat insulating portion 19 is attached on the detection block portion 16 and further attached on the heat insulating portion 19. By attaching the section 20, the detection block section 16 is completely isolated from the outside and is not affected by the outside air temperature.

Further, as shown in FIGS. 2 (a) and 2 (b),
An in-bath temperature detector 22 that detects the temperature in the processing bath 1 is provided above the detection block section 16.
Below 6 is an outside air temperature detector 2 for detecting the outside air temperature.
3 are provided.

FIG. 3 is a block diagram showing the configuration of the control unit of the food waste processing apparatus shown in FIGS. 1 and 2. The control unit shown in the same figure determines the moisture content of the sawdust 14 placed in the processing tank 1 based on the information from the heating temperature detection device 17 and the heating device 18 of the detection block unit 16 which constitutes the moisture content sensor. The stirring motor 10, the heater 11, and the ventilation fan 13 are controlled so as to efficiently decompose and dispose of the garbage by the detected water content, and the water content prediction processing unit 41 and the water content determination processing unit are provided. 43 and a moisture content control unit 45. The moisture content sensor detects the moisture content in the treatment tank 1 when there is no sawdust and garbage in the treatment tank 1 as “0% moisture content”, and the 0% moisture content is 0% moisture content. It is stored in the rate storage unit 67.

The heating temperature detecting device 17 is connected to the moisture content prediction processing unit 41 via the heating temperature storage unit 47, and the temperature of the sawdust 14 detected by the heating temperature detection device 17 is once stored in the heating temperature storage unit 47. Is stored in the heating temperature storage unit 47 and then supplied to the moisture content prediction processing unit 41 from the heating temperature storage unit 47.

The heating device 18 has a heating power output section 49.
Is connected to the moisture content prediction processing unit 41, and heating power is supplied through the heating power output unit 49 under the control of the moisture content prediction processing unit 41, thereby heating. Further, the heating power of the heating device 18 is detected by the heating power detection unit 51 and supplied to the moisture content prediction processing unit 41.

The in-tank temperature detector 22 and the outside air temperature detector 23 are connected to the moisture content prediction processing unit 41 via an in-tank temperature storage unit 53 and an outside air temperature storage unit 55, respectively.
The temperature of the processing tank 1 and the outside air temperature detected by the in-tank temperature detector 22 and the outside air temperature detector 23 are once stored in the in-tank temperature storage unit 53 and the outside air temperature storage unit 55, respectively, and then the moisture content prediction processing unit. 41 is supplied.

The agitation motor 10, the heater 11 and the ventilation fan 13 have a moisture content control unit 45 via a drive unit 57.
Connected to the drive unit 57 under the control of the moisture content control unit 45.
The drive is controlled via.

An external variable setting unit 59 and a timer control unit 61 are connected to the moisture content prediction processing unit 41, and the external variables set by the external variable setting unit 59 and the timer information from the timer control unit 61 are moisture. It is supplied to the rate prediction processing section 41, and the moisture rate prediction processing section 41 can control the timer control section 61. The output signal of the external variable setting unit 59 is supplied to the moisture content control unit 45 and the timer control unit 61, and the output signal of the timer control unit 61 is also supplied to the moisture content control unit 45. It is configured to control the control unit 61.

Further, the moisture content prediction processing section 41 is connected to the abnormality output display section 65 via the abnormality processing section 63 so that the abnormal state of the raw garbage processing apparatus can be displayed on the abnormality output display section 65. There is.

In the food waste processing apparatus configured as described above, the moisture content sensor of the detection block section 16 including the heating temperature detection apparatus 17 and the heating apparatus 18 is the joint section 24.
Also, the processing tank 1 is in close contact with the processing tank 1 through the contact portion 25, that is, the bonding contact portion 27, and the processing tank 1 is made of a material having low thermal conductivity such as stainless steel or polymer resin, that is, a material having poor thermal conductivity. Therefore, the heating temperature detection device 17 can accurately detect the temperature of the sawdust 14 in the processing tank 1, and the heating device 18 can efficiently heat the sawdust 14.

That is, since the processing tank 1 is made of a material having a low thermal conductivity, the heat from the heating device 18, more specifically, the heat of the detection block portion 16 heated by the heating device 18, is generated in the processing tank 1. Since the heat is merely diffused only to the vicinity of the joint portion 24, the heat is conducted to the sawdust 14 near the contact portion 25, and the heat is dissipated from the sawdust 14 near the contact portion 25 to the sawdust 14 other than near the contact portion 25. To be On the contrary, the temperature of the sawdust 14 is efficiently transmitted to the detection block portion 16 by the same principle, and can be accurately detected by the heating temperature detection device 17.

When the heat of the detection block 16 heated by the heating device 18 is sufficiently conducted to the sawdust 14 in this way, when the moisture content in the sawdust 14 is small, the sawdust 14
The heat conduction to the sawdust 14 is high, and the temperature of the sawdust 14 detected by the heating temperature detecting device 17 is high. When the moisture content in the sawdust 14 is high, the heat conduction to the sawdust 14 is large and the heating temperature detecting device 17 The detection temperature becomes low.

FIG. 4 is a graph in which the moisture content of the decomposed material in the processing tank 1 is measured by the moisture content sensor including the heating device 18 and the heating temperature detection device 17. More specifically, this figure shows the heating time when the sawdust 14 is heated by the heating device 18 on the horizontal axis, and the detected temperature of the heating temperature detection device 17 and the heating device 1 when the saw device 14 is not heated by the vertical axis.
8 shows the difference in the temperature detected by the heating temperature detecting device 17 when heated at 8, and shows the water content of the sawdust 14 as a parameter. As shown in the figure, the water content of the sawdust 14 is 0
%, 20%, 40%, and 60% are shown, but the heating time and the temperature difference are proportional to each moisture content, and the moisture content is clear by detecting the heating time and the temperature difference. Understand. That is, for example, the heating time is 5
In the case of minutes, when the temperature of the sawdust 14 is 14 ° C., the moisture content is 0%, and when it is 12 ° C., the moisture content is 20%.
%, The moisture content is 40% at 11 ° C., and
It can be seen that the moisture content is 60% in the case of ° C.

That is, the temperature difference detected by the moisture content sensor becomes smaller as the decomposed material contains more water, and becomes larger as the decomposed material contains less water. Furthermore, the difference in temperature detected by the moisture content sensor is greatest when there is no food waste or decomposed material in the treatment tank.

As described above, the water content of the sawdust 14 in the processing tank 1 can be detected from the heating time by the heating device 18 constituting the water content sensor and the temperature difference detected by the heating temperature detection device 17. Then, based on the water content thus detected, the water content control unit 45 drives and controls the stirring motor 10, the heater 11, and the fan 13 so that the water content is optimum.

Next, with reference to the flow chart shown in FIG. 5, the flow of control for optimally controlling the food waste processing apparatus by the moisture content sensor will be described.

In FIG. 5, when the food waste processing device is powered on, it is checked whether or not 0% correction reading confirmation is to be performed (steps S60 and S61). When performing 0% correction reading, preparation for 0% correction reading is executed (step S
62). When the 0% correction reading preparation is completed, the 0% correction reading start is executed (step S63), the heating device 18 is stopped, and the heating temperature detection device 17 is read and stored. Further, the timer control unit 61 is activated to start the 5-minute timer (step S64). The 5-minute timer is checked to check whether 5 minutes have elapsed (step S65).

When the 5-minute timer has elapsed, the 0% correction reading is ended (step S66), and the heating detection temperature of the heating temperature detecting device 17 stored at the 0% correction reading start (step S63) and the lapse of 5 minutes. The difference between the subsequent heating detection temperatures is calculated, and the 0% moisture content when the decomposed material and the garbage are not contained in the processing tank 1 is stored in the 0% moisture content storage unit 67. Further, the heating device 18 is stopped.

As described above, by detecting the 0% moisture content,
When the 0% correction reading is completed, initial processing of the food waste processing apparatus is performed to control the moisture content (step S67). When the initial process is completed, a moisture content determination is executed (step S
68) The measured moisture content is determined, control is performed according to the moisture content (step S69), and the moisture content contained in the decomposed material in the processing tank 1 is controlled to be optimum.

During the control based on the water content, it is confirmed whether or not to put raw garbage (step S70). If no raw garbage is put in, it is confirmed that no raw garbage has been put in (step S71). If not, step S68
Returning to step 1, the same control is repeated, but when the garbage is added or the time is exceeded, the time excess is cleared (step S72), and the measurement of the water content is started in the next step S73 and subsequent steps.

The moisture content is measured by the same method as the 0% correction reading described above. That is, first, the preparation for reading the moisture content is executed (step S73). When the preparation for reading the moisture content is completed, the moisture content reading is started (step S74), the heating device 18 is stopped, and the heating temperature detecting device 17 is read and stored. Further, the timer control unit 61 is activated to start the 5-minute timer (step S75). Check the 5 minute timer and check if 5 minutes have elapsed (step S
76).

When the 5-minute timer has elapsed, the reading of the moisture content is terminated (step S77), and the heating detection temperature of the heating temperature detecting device 17 stored at the beginning of the moisture content reading (step S74) and the temperature after 5 minutes have elapsed. The difference between the heating detection temperatures is calculated, the moisture content in the case where the decomposed material and the garbage are contained in the treatment tank 1 is measured, and the measured moisture content value is stored. Then, the measured water content is corrected with the 0% water content (step S78).

Next, a correction method for correcting the measured water content with 0% water content will be described.

FIG. 6 is a diagram showing the basic characteristics when the moisture content is measured with the moisture content sensor comprising the heating device 18 and the heating temperature detection device 17 attached to the processing tank 1 as shown in FIG. 4 is a graph similar to FIG. In the figure, the solid line indicates a theoretical threshold moisture content of 0%, which is the theoretical moisture content in the treatment tank 1 when the treatment tank 1 does not contain decomposed material sawdust and garbage. Is the measured value of 0% when there is no decomposed material sawdust and food waste in the treatment tank 1 when the moisture content of the treatment tank 1 is measured by the moisture content sensor. The measured value is shown. As you can see from the figure, the moisture content is 0%.
The theoretical threshold value here is 15.0 ° C in 5 minutes, the measured value when the moisture content is 0% and there is no sawdust is 14.5 ° C, and the measured moisture content is different by 0.5 ° C (correction value). Is occurring. This difference is an error including an error of the moisture content sensor itself and an attachment error of the moisture content sensor. Therefore, by correcting the measured value of the water content when the decomposed material sawdust and the garbage enter the processing tank 1, it is possible to calculate the accurate water content.

FIG. 7 shows two thresholds, 20% moisture content and 60% moisture content, which are two thresholds that determine the control method for controlling the moisture content of sawdust to the optimum state by the measured moisture content. In the figure, a moisture content of 20% theoretical threshold = 1.2 ° C. and a moisture content of 60% theoretical threshold = 10.0 ° C. are used. Then, the 20% correction threshold and the 60% correction threshold are corrected by using the difference as described below, and the 20% correction threshold and the 60% correction threshold are indicated by dotted lines.

As described with reference to FIG. 6, a method of correcting the moisture content in consideration of the error of 0.5 ° C. will be described. In this description, the moisture content is 0% theoretical threshold = 0% theoretical threshold, the moisture content is 0%, the measured value without sawdust = 0%, the moisture content is 20%, the theoretical threshold = 20%, the theoretical threshold, and the moisture content is 6.
0% theoretical threshold = 60% theoretical threshold, actual measured moisture content = measured moisture content, corrected measured moisture content = corrected moisture content.

The first correction method is a method of correcting with the ratio of the 0% theoretical threshold value and the 0% measured value, and the 20% correction threshold value, the 60% correction threshold value, and the corrected moisture content shown by the dotted line in FIG. It becomes like a formula.

(1) (0% theoretical threshold / 0% measured value) × 20% theoretical threshold = 20% correction threshold (0% theoretical threshold / 0% measured value) × 60% theoretical threshold = 60
% Correction threshold value (0% theoretical threshold value / 0% measurement value) × measured water content = corrected water content

In the food waste processing apparatus, the water content controller 45 controls the agitation motor 10 based on the water content thus corrected.
The heater 11 and the fan 13 are drive-controlled to optimize the water content, and the food waste is efficiently fermented and decomposed. In this case, the food waste processing apparatus corrects the corrected water content by 20% correction threshold and 60% correction. The stirring motor 1 is compared with a threshold value so that the corrected water content is between the 20% correction threshold value and the 60% correction threshold value.
0, the heater 11, and the fan 13 are drive-controlled, whereby the food waste is fermented and decomposed most efficiently.

The second correction method is a method of correcting the difference between the 0% theoretical threshold value and the 0% measured value, and the 20% correction threshold value, the 60% correction threshold value, and the corrected moisture content are as follows. become.

## EQU00002 ## 20% theoretical threshold- (0% theoretical threshold-0% measured value) = 20% correction threshold 60% theoretical threshold- (0% theoretical threshold-0% measured value) = 60
% Corrected threshold Moisture content measured- (0% theoretical threshold value-0% measured value) = Corrected moisture content

The third correction method is a method of correcting with a 0% measurement value, and the 20% correction threshold value, the 60% correction threshold value, and the corrected water content are as follows. 0% measured value / 20% theoretical threshold = 20% correction threshold 0% measured value / 60% theoretical threshold = 60% correction threshold 0% measured value / measured moisture percentage = corrected moisture percentage

[0050]

As described above, according to the present invention as set forth in claim 1, the measured value of 0% and the theoretical theoretical moisture content when the decomposed material and the garbage are not contained in the processing tank are obtained. Based on this, the measured water content in the processing tank when the decomposed material and food waste are contained in the processing tank is corrected. Even if there is an error in the water content measured by the sensor, the water content that includes this error is accurately corrected, the correct water content is calculated, and this accurate water content is used to ferment the food waste. The decomposition process can be performed accurately.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an overall configuration of a food waste processing device according to an embodiment of the present invention.

FIG. 2 is a view of a processing tank portion provided in the food waste processing apparatus shown in FIG. 1 taken out and viewed from the front side.

FIG. 3 is a block diagram showing a configuration of a control unit of the food waste processing device shown in FIGS. 1 and 2.

FIG. 4 is a graph in which the moisture content of the decomposed material in the treatment tank is measured by the moisture content sensor of the food waste treatment apparatus shown in FIGS. 1 and 2.

5 is a flowchart showing the operation of the food waste processing device shown in FIGS. 1 and 2. FIG.

FIG. 6 is a graph similar to FIG. 4 showing basic characteristics when the moisture content at 0% is measured by the moisture content sensor of the food waste treatment apparatus shown in FIGS. 1 and 2.

FIG. 7 is a diagram showing 20% and 60% theoretical threshold values and correction threshold values of the moisture content sensor of the food waste processing apparatus shown in FIGS. 1 and 2;

[Explanation of symbols]

 1 Processing Tank 10 Stirring Motor 11 Heater 13 Ventilation Fan 14 Sawdust 16 Detection Block Part 17 Heating Temperature Detection Device 18 Heating Device 41 Moisture Content Prediction Processing Department 43 Moisture Content Determination Processing Department 45 Moisture Content Control Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Narusaka 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Incorporated, Toshiba Living Space Systems Engineering Laboratory (72) Inventor, Tsuneji Tsukuni 3 Shinbashi, Minato-ku, Tokyo 3-9, Toshiba Abu E Co., Ltd.

Claims (1)

[Claims] 1. A food waste processing device for fermenting and decomposing food waste by introducing the food waste into a processing tank containing a decomposing material and stirring and mixing the same. The water content in the processing tank is detected. Moisture content detecting means and 0% measured value for setting and controlling so that the moisture content in the treatment tank when the decomposed material and the garbage are not contained in the treatment tank is detected as 0% measured value by the moisture content measuring means. Detecting means and moisture content measurement value detecting means for setting and controlling so that the moisture content in the treatment tank when the decomposed material and the garbage are contained in the treatment tank is detected as the moisture content measurement value by the moisture content detecting means. And a correction means for correcting the moisture content measured value based on the theoretical moisture content in the design of the moisture content in the treatment tank and the 0% measured value when the decomposed material and the garbage are not contained in the treatment tank. Garbage characterized by having and Management apparatus.