JP2000325912A - Method and apparatus for automatically controlling operation of garbage treatment machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set up the time of completion of garbage drying surely irrespective of a difference in outside air temperature or the specifications of a condenser and a heater. SOLUTION: In an automatic operation control method for a garbage treatment machine 1 equipped with a treatment tank 2 for agitating/drying garbage while heating it, a circulation passage 4 having a blower 3 for sucking/ circulating ambient gas in the tank 2, a condenser 5 which is installed upstream from the blower 3, cools the ambient gas F, and condenses steam in the gas F, and a gas-liquid separation tank 6 which is installed between the condenser 5 and the blower 3 and separates the gas from the condensed liquid by gravity, the temperature of the bottom surface of the tank 2 is detected, and a drying end time is decided from the variation in the bottom surface temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of drying garbage.
The present invention relates to a garbage disposal machine to be solidified, and more particularly to an automatic operation control method and an apparatus for a garbage disposal machine capable of determining a drying end time irrespective of an outside temperature to be charged into a treatment tank or a difference in specifications of a condenser and a heater. is there.

[0002]

2. Description of the Related Art A garbage disposer for drying and treating garbage (vegetable waste, garbage, etc.) having a large amount of water from a kitchen in a restaurant or at home uses a garbage disposer which is heated as it is. The gas circulation path is connected to the processing tank that heats garbage because the odor leaks, the atmospheric gas in the processing tank is sucked, the vapor in the atmospheric gas is cooled by a condenser and condensed, and the gas-liquid separator is used. To separate the gas and liquid, and circulate the gas again to the treatment tank to dry the garbage while deodorizing, so that the garbage is finally dried to a smooth state or a smooth but slightly oily state It has become.

By the way, when the garbage is automatically controlled by this garbage disposer to finally dry the garbage to a smooth state or a smooth but somewhat oily state, the present inventor has conventionally proposed Japanese Patent Application No. 10-370561. As proposed in the above publication, a temperature sensor is provided in the circulation path from the processing tank to the condenser, and the end time is determined by the temperature of the steam passing through the circulation path.

More specifically, as shown in FIG. 6, the evaporative drying time A until the steam temperature suddenly drops (falls to 90 ° C.) from a constant temperature of about 100 ° C. is counted. According to A, the solidification time B from the evaporative drying time A to the end of the operation is calculated to determine the drying end time.

[0005]

However, when the end time is determined by the temperature of the steam passing through the circulation path as described above, the steam temperature is set to the reference temperature (90 ° C.) depending on the outside air temperature.
In some cases, the time required for drying to vary varies, so that the drying end time may not be accurate.

In order to lower the temperature of the condensed water to reduce its odor, the capacity of the condenser is increased, or the rated power is reduced in consideration of the power situation of the user to reduce the heater capacity. Temperature was lower than 100 ° C., so that the reference temperature had to be changed.

Accordingly, the present invention has been devised to solve the above-mentioned problem, and an object of the present invention is to ensure that the end time of garbage drying is completed irrespective of the outside air temperature or the difference in the specifications of the condenser and the heater. An object of the present invention is to provide an automatic operation control device for a garbage disposal machine that can be set.

[0008]

In order to solve the above-mentioned problems,
The invention of claim 1 is a processing tank for stirring and drying garbage while heating, a circulation path having a blower for sucking and circulating atmospheric gas in the processing tank, and an upstream of the blower in the circulation path. A condenser for cooling the atmospheric gas and condensing vapor in the atmospheric gas, and a gas-liquid separation tank provided between the condenser and the blower and gravity-separating the gas and the condensed liquid. An automatic operation control method for a garbage disposal machine, wherein the temperature of the bottom surface of the processing tank is detected and the drying end time is determined from a change in the bottom surface temperature.

According to the above method, by detecting the temperature of the bottom surface of the processing tank and determining the drying end time from the change in the bottom surface temperature, the temperature is not affected by the outside air temperature or the difference in the specifications of the condenser and the heater. In addition, the end time of drying the garbage can be reliably set.

According to a second aspect of the present invention, the temperature of the bottom of the processing tank is detected from the start of operation of the processing tank and the operation time is integrated, and the detected temperature rises rapidly from a constant temperature of about 90 ° C. from the start of operation. Count the evaporative drying time until
2. The automatic operation control method for a garbage disposal machine according to claim 1, wherein the drying end time is determined based on the time and the operation of the processing tank is stopped.

The invention according to claim 3 is a processing tank for heating and stirring the garbage while drying it, a circulation path having a blower for sucking and circulating the atmospheric gas in the processing tank, and A condenser provided on the upstream side of the blower for cooling the atmosphere gas and condensing vapor in the atmosphere gas;
In a garbage disposer provided between the condenser and the blower and provided with a gas-liquid separation tank for gravity-separating a gas and a condensed liquid, a temperature sensor provided on a bottom surface of the processing tank; The temperature of the temperature sensor is detected from the start of operation and the operation time is integrated, and the evaporative drying time from the start of operation until the temperature detected by the temperature sensor rapidly rises from a constant temperature of about 90 ° C. is counted. And an operation control means for determining the drying end time and stopping the operation of the processing tank with reference to the above.

[0012]

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

FIG. 1 is an overall configuration diagram showing an embodiment of a garbage processing machine according to the present invention, FIG. 2 is an enlarged view of a main part showing a processing tank and a control device, and FIG. It is the graph which showed the temporal change of the side surface temperature.

First, the overall configuration of a garbage disposal machine according to the present invention will be described with reference to FIG.

As shown in FIG.
A processing tank 2 for heating and drying the garbage R, and an atmosphere gas F inside the processing tank 2 is sucked and circulated to re-process the processing tank 2.
A circulation path 4 having a blower 3 returning to the inside is connected to a condenser 5 that cools the atmosphere gas F and condenses the vapor in the atmosphere gas F on the upstream side of the blower 3 in the circulation path 4. Between the blower 5 and the blower 3, there is provided a gas-liquid separation tank 6 for separating gas and condensate from each other by gravity.

The processing tank 2 is provided so that a heating coil 8 covers a container 7 formed in a bottomed cylindrical shape.
Inside the container 7, a stirring member 9 for crushing and stirring the charged garbage R is provided. A lid 11 is provided at the upper opening of the container 7, and after the garbage R is charged, the lid 11 is closed to keep the inside of the processing tank 2 in a sealed state.

The stirring member 9 includes a rotating shaft 12 erected along the axis of the processing tank 2 and a plurality of blades 14 radially attached to the rotating shaft 12 at equal intervals in the circumferential and axial directions. And Further, the stirring member 9 is provided with a motor 15 for rotating the stirring member 9 and a speed reducer 16.
Is connected to the rotating shaft 12 through the shaft.

An opening 17 serving as an outlet for the atmospheric gas F inside the processing tank 2 is formed in the upper part of the processing tank 2, and a suction pipe 25 constituting a part of the circulation path 4 is connected to the opening 17. Have been.

The condenser 5 in the circulation path 4 is formed by providing plate-shaped radiation fins 19 on a meandering pipe 18, and a cooling fan 21 for air-cooling the atmosphere gas F in the condenser 5. Is provided.

The gas-liquid separation tank 6 is formed in a closed box shape. A gas inlet 22 through which the atmospheric gas F cooled by the condenser 5 flows is formed in the upper part of the side surface. A gas outlet 23 for discharging G is formed, and a liquid outlet 2 for discharging condensate W downward is formed at the bottom.
4 are formed.

The blower 3 is provided above the gas outlet 23 downstream of the gas-liquid separation tank 6. Downstream of the blower 3 is provided an inflow pipe 26 that constitutes a part of the circulation path 4, and the inflow pipe 26 is connected to an opening 27 formed at the upper part of the processing tank 2 and serving as a gas inlet. Have been.

At the bottom of the gas-liquid separation tank 6, the liquid is discharged while maintaining the internal pressure in the circulation path 4 within a set range, and outside air is introduced when the pressure in the circulation path 4 becomes negative. A substantially U-shaped pressure compensation drain pipe 31 is connected. One end of the pressure compensation drain pipe 31 is connected to the liquid discharge port 2 of the gas-liquid separation tank 6.
4, the other end of which is open to the outside and a U-shaped curved portion 32 is formed therebetween. The liquid from the gas-liquid separation tank 31 is stored in the curved portion 32 and the water head pressure H in the circulation path 4. Pressure is compensated.

A band-shaped ribbon heater 33 is wound around the pressure compensating drain tube 31 so as to heat the liquid so that the liquid inside does not freeze during the cold season.

In the garbage disposal in this garbage disposal machine, garbage is drained, put into the treatment tank 2, heated by the heating coil 8, and at the same time, the atmosphere gas F in the treatment tank 2 is circulated by the blower 3. The drying process is performed while circulating in the road. The vapor generated from the garbage is cooled and condensed by the condenser 5 together with the atmospheric gas F, the liquid component is removed in the gas-liquid separation tank 6, and the gas component is returned to the processing tank 2 through the inflow pipe 26.

In the processing tank 2, the water is gradually evaporated while being agitated and pulverized by the agitating member 9 to be dried and solidified. The processed material remaining as a result of drying is taken out from the discharge port 34 formed in the processing tank 2 and buried in the soil to be recycled as a raw material for fertilizer, or incinerated together with general waste. .

In the present invention, the container 7 of the processing tank 2
A bottom surface temperature sensor 35 for detecting the bottom surface temperature and a side surface temperature sensor 36 for detecting the side surface temperature are provided, and a suction pipe 25 forming a circulation path 4 between the processing tank 2 and the condenser 5.
Is provided with a circulation path temperature sensor 37 for detecting the ambient gas temperature (steam temperature) from the processing tank 2, and the detection values of these temperature sensors 35, 36, 37 are input to the operation control means 38. .

As shown in FIG. 2, the operation control means 38 is connected to each of the temperature sensors 35, 36, and 37, starts the blower 3, the motor 15, and the cooling fan 21 at the start of operation, and simultaneously activates the heating coil 8 And a sequencer 41 for controlling the temperature in the processing tank 2 by controlling ON / OFF of the heating coil 8 according to the detection values of the bottom surface temperature sensor 35 and the side surface temperature sensor 36 during the operation.

A temperature controller 43 is connected to the sequencer 41. The temperature controller 43 is provided with a display section 44 for displaying the temperature of each section and an adjustment switch 45 for adjusting the set temperature.

The present invention is characterized in that the temperature of the bottom surface of the processing tank 2 is detected and the drying end time is determined from the change in the bottom surface temperature.

Hereinafter, a specific automatic operation control method will be described with reference to the graph of FIG. 3 showing the change over time of the bottom surface temperature and the side surface temperature of the processing tank.

After energizing the heating coil 8, the bottom surface temperature (shown by a broken line in the figure) once rises to around 90 ° C.
This state is maintained while the garbage inside is in a uniform flowing state. This is because the water content of the garbage is large and the heat conductivity from the wall surface of the processing tank 2 to the garbage is large, so that a large amount of heat is transmitted to the garbage and the bottom surface is kept at a constant temperature.

The thermal conductivity Q (kcal / h) is obtained by the following equation.

Q = S · h · (T _W −T _R ) (where S: heat transfer area (m ² ), h: heat transfer coefficient (kca)
l / m ² · h · ° C.), T _W : wall surface temperature (° C.), T _R : temperature of garbage near the wall surface (° C.). As the water content decreases and air is interposed between the garbage and the wall surface due to solidification of the garbage, the heat transfer coefficient decreases and the bottom surface temperature rises rapidly. The temperature is 14
When the temperature rises to 0 ° C., ON / OFF of the energization of the heating coil 8 is repeated by the sequencer 41, and is maintained between 130 ° C. and 140 ° C.

Of the above-mentioned temporal changes in temperature, the detected temperature is about 9
A point at which the temperature suddenly rises from a constant temperature of 0 ° C., for example, a point at which the detected temperature exceeds 110 ° C. is detected by the sequencer 41, and this is counted as the evaporative drying time A described in the related art. The solidification time B from the evaporative drying time A to the end of the operation is calculated to determine the drying end time.

The side temperature (shown by a solid line in the figure) is
Once the temperature rises to about 100 ° C., and after maintaining this state for a certain period of time, the temperature rises sharply, and when the temperature rises to 140 ° C., the sequencer 41 turns the heating coil 8 on and off.
N · OFF is repeated and maintained between 130 ° C. and 140 ° C. However, the amount of garbage varies slightly with time. The end time is determined.

Next, a method of calculating the solidification time B will be described.

FIG. 4 shows the data when the solidification time B is arbitrarily selected for the time until the bottom surface temperature exceeds 110 ° C. (evaporation drying time A) on the horizontal axis and the drying treatment is performed. Indicates that the product was dried and smooth, or that it was dry and solidified, but was slightly oily and that it had good drying and solidification. Shows enough.

As is clear from the data in FIG. 4, in the case of □ which shows good drying and solidification, there is a correlation between the evaporative drying time A and the solidification time B. It can be seen that even if the time B is short, and the evaporation drying time A is different, the optimum solidification time B has a certain relationship with the evaporation drying time A.

FIG. 5 shows the relationship between the amount of garbage charged into the processing tank 2 and the optimal drying end time (A + B). It was found that there was a proportional relationship between the amount and the drying end time.

Therefore, when the evaporation and drying A to B are obtained from the straight line L in FIG. 4, the slope k1 of the straight line L is 0.25 and the intercept k2
Is 1.8 (Hr), and therefore, the equation of the straight line L can be expressed by B = 0.25A + 1.8 (Hr).

The formula obtained in FIG. 4 is a general and standard garbage discharged from a dining room or a restaurant, and is a single processed product (eg, only vegetables, only fish, only okara, only lawn grass). Then, the values of the various slopes k1 and the intercepts k2 are different.

Therefore, the above equation is set as B = k1A + k2 (Hr), and the operation control means 38 can change the coefficient according to the type of dust so that the coefficients k1 and k2 can be changed according to the type of dust.

In this case, k1 is set to 0.1 according to the kind of garbage.
By setting k2 in the range of 0.3 to 0.3 and changing k2 in the range of 0 to 2.0, the optimal drying end time (A + B) for drying and solidifying according to the type of all garbage is set. Becomes possible.

As described above, in the present invention, the time when the bottom surface temperature of the processing tank 2 rapidly rises from 90 ° C. (for example, 110 ° C.) is obtained from the detected value by the operation control means 38 and from the start of operation to the time. And the remaining solidification time B is calculated from the obtained evaporation and drying time A, and A + B (time) from the start of the treatment.
Then, the power supply to the heating coil 8 in the processing tank 2 is stopped to terminate the processing.

As described above, the evaporative drying time A is determined from the change in the bottom surface temperature, so that the state of the garbage in the processing tank 2 can be detected without passing through the circulation path 4 and is not affected by the outside temperature. . Further, it is not necessary to change the set temperature even when the specifications of the condenser and the heater differ.

The bottom surface temperature has a large variation (90 ° C.).
From 140 ° C to 50 ° C), the change can be easily detected. As a result, it is possible to reliably and accurately stop the automatic operation in a state where the drying and solidification are always good.

[0047]

In summary, according to the present invention, regardless of the outside air temperature or the difference in the specifications of the condenser and the heater,
It has an excellent effect that the end time of drying garbage can be reliably set.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a garbage processing machine according to the present invention.

FIG. 2 is an enlarged view of a main part showing a processing tank and a control device.

FIG. 3 is a graph showing a change with time of a bottom surface temperature and a side surface temperature of a processing tank.

FIG. 4 is a graph showing the relationship between the evaporative drying time and the solidification time.

FIG. 5 is a graph showing a relationship between a garbage processing amount and a processing time.

FIG. 6 is a graph showing a change over time of a steam temperature reaching a condenser.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Garbage processing machine 2 Processing tank 3 Blower 4 Circulation path 5 Condenser 6 Gas-liquid separation tank 35 (Bottom) temperature sensor 38 Operation control means

Claims (3)

[Claims] 1. A processing tank for heating and stirring garbage while drying, a circulation path having a blower for sucking and circulating atmospheric gas in the processing tank, and a circulation path upstream of the blower in the circulation path. Garbage provided with a condenser for cooling the atmospheric gas and condensing the vapor in the atmospheric gas, and a gas-liquid separation tank provided between the condenser and the blower for gravity separation of the gas and the condensed liquid An automatic operation control method for a garbage processing machine, comprising: detecting a temperature of a bottom surface of the processing tank and determining a drying end time from a change in the bottom surface temperature. 2. A process for detecting the temperature of the bottom surface of the processing tank from the start of operation of the processing tank and integrating the operation time, and evaporating and drying the temperature from the start of operation until the detected temperature rises rapidly from a constant temperature of about 90 ° C. 2. The automatic operation control method for a garbage disposal machine according to claim 1, wherein the time is counted, and based on the time, the drying end time is determined and the operation of the processing tank is stopped. 3. A processing tank for stirring and drying the garbage while heating the garbage, a circulation path having a blower for sucking and circulating the atmospheric gas in the processing tank, and a circulation path upstream of the blower in the circulation path. Garbage provided with a condenser for cooling the atmospheric gas and condensing vapor in the atmospheric gas, and a gas-liquid separation tank provided between the condenser and the blower for gravity separation of the gas and the condensed liquid In the processing machine, the temperature sensor provided on the bottom surface of the processing tank, the temperature of the temperature sensor is detected from the start of the operation of the processing tank and the operation time is integrated, and the detected temperature of the temperature sensor from the start of the operation is:
Operation control means for counting the evaporative drying time from a constant temperature of about 90 ° C. to a sharp rise, determining a drying end time based on the time, and stopping the operation of the processing tank. And garbage processing machine.