KR20100119656A - Waste load sensing method by speed commend voltage and waste treatment apparatus using the same - Google Patents

Abstract

PURPOSE: A waste load sensing method by speed commend voltage and a waste treatment apparatus using the same are provided to save the cost thereof and simplify the apparatus structure through a proper operation. CONSTITUTION: A waste load sensing method by speed commend voltage comprises the steps of: inputting a food waste to a drier including a pulverizing screw(S11); generating speed command voltage for controlling the speed of a motor unit; measuring the load of the inputted food waste from the correlation between the predetermined speed command voltage and the load of the food waste(S14); determining the rotating speed within the drier according to the load of the food waste(S15); and adjusting the strength of the supply voltage to enable a driving gear installed at the motor unit to drive the pulverizing screw(S18).

Description

Food load detection method by speed command voltage and food processor using same {Waste Load Sensing Method By Speed Commend Voltage and Waste Treatment Apparatus using the same}

The present invention relates to a food load sensing method using a speed command voltage and a food processor using the same. More specifically, the speed command voltage generated from the motor unit is detected when the grinding screw in the food processor is driven at a constant speed. After determining the load from the correlation between the speed command voltage and the load of the food waste, the food waste treatment method and the food processor using the same to control the proper speed of the motor and the proper size and supply time of the heat source applied to the food waste will be.

In general, a certain amount of food waste is discharged from each home or restaurant every day, and the food waste is discarded after only the water is filtered through a simple strainer. The conventional food waste disposal method causes unpleasant odors to contaminate the surrounding air when the food waste is not discarded frequently. Recently, due to the improvement of eating habits and the increase of eating out business, many food wastes are emitted from homes and restaurants, and most of these food wastes have been left in a state of high water content, which has become the main cause of polluting the environment.

As such, the discarded food waste is difficult to incinerate and is insufficient for use as a fertilizer and feed, and thus is inevitably buried in a landfill.

And in order to bury the food waste containing the water to transport it to the landfill through a transport means during which the odorous contaminants flow down from the food waste to the road, and also from the collection of garbage to landfill There is a difficulty in securing more manpower and sufficient landfill.

In addition, even when the landfill of food waste is reclaimed, the odor is generated around the landfill and provides habitat for many pests such as flies and mosquitoes, which causes a lot of damage to people living in the surrounding area. There is a problem that results in contaminating (ground water).

In order to solve these problems, recently, a food waste processing apparatus capable of treating food waste professionally has been developed. The food waste treatment apparatus may be classified into various kinds according to the method of processing food waste, and may be classified into various kinds according to its use state. For example, there may be a sink ball type that is mounted and used in a kitchen or a freestanding type that may be installed and used in an arbitrary place.

However, the currently used food waste processing apparatus does not measure the weight of the food waste put into the dryer separately, but applies a constant heat source for a predetermined time to dry and process the grinding screw at a constant speed irrespective of the amount of food added. As the drying operation is performed, there is a problem in that the operation time of the movable motor is increased and power consumption is increased.

In addition, by using a piezoelectric sensor and expensive detection means to measure food weight or using a current of the motor, a dry process time is set by detecting the current by using a current sensor to detect the current. There may be a method of stirring and preheating the same agitation means and a heating means such as a heater to heat-dry the treatment. The above method can measure the food load and adjust the heating time according to the measured load, but there is a burden in terms of cost since a separate device must be installed. In addition, there is a disadvantage that there may be a difficulty in managing the equipment if more equipment is increased.

The present invention, in order to solve the above problems, instead of removing the piezoelectric sensor for directly measuring the load of the food waste input, such as the speed command voltage signal generated from the motor, the rotational speed of the motor, food load, etc. It is an object of the present invention to provide a food load detection method based on a speed command voltage that detects the amount of food waste introduced by using correlations and then properly grinds or dries. In addition, an object of the present invention is to provide a food processor using the food load detection method.

Food load detection method according to the speed command voltage according to an aspect of the present invention provided to achieve the above object is the step of injecting food waste into the drying furnace equipped with a crushed screw in the food processor, the driving force to the crushed screw Generating a speed command voltage by the controller for controlling the speed of the motor unit to be provided; and inputting the speed command voltage into the drying furnace from a correlation between the speed command voltage previously input to the controller and the food load after the controller detects the speed command voltage; Measuring a load of food waste, determining a rotational speed so that the food waste can be agitated, dried or pulverized in the drying furnace according to the measured load of food waste, and attached to the motor unit The supply voltage is large enough to drive a grinding gear. Characterized in that it comprises the steps section.

The motor of the motor unit may be a brushless DC (BLDC) motor.

The correlation between the speed command voltage and the load of food waste for the rotation speed reference value is linearly proportional to the graph with the horizontal axis being the speed command voltage and the vertical axis being the torque according to the food load. Can be.

The food waste treatment method using the load sensing may further include a step of discharging the powder-dried processed material through an outlet formed in the lower part of the drying furnace after the stirring, drying, and grinding process is completed.

If it is determined that the rotation speed is out of the reference range input to the control unit in the step of determining the rotation speed, the user may go through the step of adjusting the amount of food waste put into the drying furnace and measuring the load of food waste again. have.

If it is determined that the rotational speed satisfies the reference range input to the control unit in the step of determining the rotational speed, the control unit may adjust the rotational speed of the drive gear through a power supply connected to the motor unit.

When an abnormality occurs in the motor unit during the operation while adjusting the magnitude of the supply voltage, after performing maintenance, the step of measuring the load of food waste using the speed command voltage may be performed again. .

Food waste treatment apparatus according to another aspect of the present invention provided to achieve the above object is a drying furnace in which food waste is input and agitating, drying or grinding is performed, disposed in the drying furnace, the radius of the rotary shaft and the rotary shaft A grinding screw having a rotating blade extending in a spiral direction toward a direction, a motor unit for providing rotational power to the grinding screw, a speed command voltage generating circuit for generating a speed command voltage according to the rotation speed of the controller, and the And a control unit electrically connected to the speed command voltage generation circuit.

Preferably, the control unit may control the rotation speed of the drive gear installed in the motor unit after measuring the load of the food waste put into the drying furnace from the correlation between the speed command voltage input in advance and the food waste load.

In addition, the motor of the motor unit may be a brushless DC (BLDC) motor.

According to the present invention, the food load detection method using the speed command voltage uses the speed command voltage Vsp which is formed in a constant correlation according to the rotational speed of the grinding screw during the operation of the motor unit. By being able to measure the appropriate rotational speed according to the load can be determined.

In addition, if a constant correlation between the speed command voltage output value and the food load of the speed command voltage generation circuit provided in the motor is grasped, a piezoelectric sensor for weight detection, a current sensor for load measurement, and an encoder for rotation speed measurement may be used. Appropriate disposal of food waste will be possible without additional equipment. Further, as in the present invention, by controlling the interlocking relationship between the speed command voltage output value and the food waste load, the device can be simplified and the cost can be reduced.

The above objects, features and other advantages of the present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, with reference to the accompanying drawings will be described in detail a food waste treatment method using a load detection and a food waste processor using the same.

1 is a conceptual diagram of a food processor according to the present invention, Figure 2 is a flow chart showing a time series of the driving step of the food processor according to the present invention, and Figures 3a to 3d are speed command voltage, motor rotational speed and food load, etc. It is a graph showing the correlation of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in general, devices for stirring, drying, and pulverizing food simultaneously perform a function of pulverizing the input food by pulverizing means and simultaneously mixing well. The user can finally process the structure by collecting the food waste collected after the stirring, drying, and pulverizing. In the present specification, a brief description will be made of a food processor 100 equipped with a drying furnace 110 in which food is crushed and dried.

The schematic structure of the food processor 100 according to the present invention is first examined.

Referring to FIG. 1, the food processor 100 includes a drying furnace 110 equipped with a grinding screw 112, a motor unit 150 driving the grinding screw 112, and a speed command voltage generating a speed command voltage. Circuit 130, the heater 140 for drying the food waste stored in the drying furnace 110, the control unit 120 connected to the motor unit 150 and the motor driving and sensing unit 152, the user of the food processor An operation panel 160 capable of operating a state and a display unit 170 for displaying a driving state can be identified.

According to the present invention, the load of food applied when the grinding screw 112 is driven in the drying furnace 110 is appropriately determined by the control unit 120 through correlation with the speed command voltage, and the determined result is determined by the motor unit ( 150 and the heater 140 to provide a food processor (100) to perform the drying / grinding process at a suitable time and temperature for the food waste in the drying furnace (110).

The grinding screw 112 may be disposed in the drying furnace 110 to be rotatable without interference, and may have a structure extending in a spiral shape along a radial direction of the rotating shaft based on a predetermined rotating shaft. Here, the drying furnace 110 may be manufactured in a hollow cylindrical or spherical shape.

The motor unit 150 is mechanically connected to the grinding screw 112 to enable the drive. The motor unit 150 is connected to the drive gear 154 directly connected to the grinding screw 112, the stirring motor 156 is directly connected to the drive gear 154, and transfers power, and the stirring motor 156 The control unit 120 is provided with a speed command voltage generation circuit 130 therein.

In the present invention, various motors such as an AC motor, a DC motor, a BLDC motor, a BLAC motor, a switched reluctance motor (SRM), a synchronous reluctance motor (SYNRM) may be used as the motor unit 150. In particular, a brushless DC (BLDC) motor may be used. It is desirable to apply for proper control of the grinding screw 112.

As the name suggests, the BLDC motor removes the brush structure from the DC motor and performs the rectification electronically. That is, the position of the permanent magnet is detected by an electronic sensor such as a hall sensor, the electric angle is judged by the detected signal, and a current is passed through the coil to generate torque. In the DC motor with a brush, the current flows through the coil by the contact of the commutator and the brush, but the brush is worn down. However, the BLDC motor is a motor that has been replaced with a non-contact position detector and a semiconductor element without using a brush. Therefore, torque generating principle of BLDC motor is same as that of DC motor.

Most of the magnets used in BLDC motors are mainly made of ferrite magnets in terms of performance and price. However, in recent years, the volume efficiency (plasticization and shortening) of plastic neodymium is improved. The direction is showing. Therefore, there is an advantage of enabling miniaturization of the motor.

The BLDC motor rotates for the first time by connecting a drive circuit composed of semiconductors to the inside or outside of the motor. The logic of rotation detects the position and serves as a distribution function for driving the signal from the Hall element to the base of the inverter transistor. Moreover, the logic circuit of rotation can generate a pulse proportional to the rotation speed, and can also be used as a feedback signal of the rotation speed.

In summary, the BLDC motor electronically mechanicalizes the mechanical rectifying mechanism, thereby reducing the electric noise and the mechanical noise, and providing high reliability and long life. In addition, it is easy to speed up and can easily respond to a request for higher density of the device. In other words, the foundation can be made freely by making the shape and structure free and compact and integrated. In particular, the BLDC motor can control the rotation speed of the blade corresponding to the object of the present invention by allowing the drive speed to be constant or variably controlled.

The speed command voltage generation circuit 130 is installed in the control unit 120 to output the speed command voltage in a constant proportional direction according to the load torque of the food. The speed command voltage is calculated by the control unit 120. Hereinafter, the correlation between the speed command voltage, the motor rotation speed, and the food load will be described with reference to FIGS. 3A to 3D.

The controller 120 is connected to the motor driving and sensing unit 152 through the control line 122, and the control line 122 controls the rotation speed output signal generated from the motor driving and sensing unit 152. To be sent). On the other hand, the control unit 120 is connected to the power supply unit 134 through the power line 124, the power supply unit 134 in sequence takes the structure that is connected to the motor driving and sensing unit 152.

When the amount of food added to the drying furnace 110 increases, the load on the grinding screw 112 is also increased accordingly. When the food load degree is increased, the starting torque for driving the grinding screw 112 is also increased. Referring to FIG. 3A, the horizontal axis is the food load and the vertical axis is the starting torque. We can see that it is linearly proportional.

As the food load degree increases, the driving force for driving the grinding screw 112 increases, so that the starting torque (load torque) should increase and the magnitude of the voltage naturally supplied to the driving gear 154 also increases in correlation. Can be. In FIG. 3B, it can be seen that the horizontal axis is linearly proportional to the speed command voltage Vsp with respect to the constant rotational speed reference value and the vertical axis is maintained in the graph with the starting torque T being maintained.

Referring to FIG. 3C, a graph in which the horizontal axis is set as the speed command voltage Vsp and the vertical axis is set as the torque due to food load can be seen, which can be seen to be linearly proportional while maintaining a positive slope.

3D, in the graph where the horizontal axis is the food load torque [mN · m] and the vertical axis is the rotational speed [rpm] of the grinding screw 112, the variation patterns according to various speed command voltages (Vsp) can be seen. However, it can be seen that it is proportional to the curved shape having a predetermined radius of curvature while maintaining the negative slope. That is, for example, when the speed command voltage (Vsp) is a constant a V (the topmost graph in the graph), the load on the grinding screw 112 increases as the food load torque increases, so that the rotational speed becomes slower. You can see that.

Referring again to FIG. 3D, the food load torque in each diagram can be known in a state where the rotation speed of the grinding screw 112 is limited to Y ₁ , and for each of the speed command voltages Vsp aV, bV, and cV. X ₁ , X ₂ , X ₃ is determined. In other words, it can be seen that the load torque of the food may gradually increase according to the increase of the speed command voltage under the constant state of the grinding screw. In other words, it can be seen that the speed command voltage for rotating at a constant rotation speed reference value increases as the food load increases.

In summary, the load torque of FIG. 3B is proportional to the food load, and the rotational speed is proportional to the speed command voltage. As a result, the speed command voltage increases when the food load torque increases and the speed command voltage decreases when the food load torque decreases. It leads to the result.

As a result, referring to FIGS. 3A and 3B, since the food load and the speed command voltage are respectively proportional to the starting torque, the speed command voltage is consequently proportional to the food load. 3d shows the results in FIG. 3c using the rotational speed and the food load torque under various speed command voltages. The controller 120 is input to the drying furnace 110 based on the predetermined rotational speed of the grinding screw 112. The proper speed command voltage is determined from the food load. For example, in the state in which the food waste is put into the drying furnace 110, the speed command voltage for rotating the grinding screw at a constant speed (ex. 8 rpm) is measured, and the magnitude of the load is determined using the speed command voltage Vsp. Will be detected. That is, when the motor is operated at the same speed in the presence of food load, the larger the food load, the larger the measured Vsp, and conversely, the smaller the food load, the smaller the Vsp voltage.

Hereinafter, a driving step of the food waste processor 100 according to the present invention will be described with reference to FIG. 2. First, power is applied through a power supply unit (not shown) of the food waste processor 100 (S10). The user inputs a proper amount of food waste through the drying furnace 110 (S11). In the food input step, a separate cutting device may be provided before entering the drying furnace 110 to prevent excessive load from being applied to the grinding screw 112. Afterwards, the user can input a process of operating the operation panel 160 in step S12. The step S12 allows the cooking method such as stirring, drying or grinding to be selected according to the type of food waste put by the user.

When the input is completed and the operation button is pressed through the operation panel 160, the voltage generated in the speed command voltage generation circuit 130 is calculated by the calculating device of the control unit 120 (S13). The controller 120 checks the food load stored in the drying furnace 112 by using a linear correlation between the speed command voltage and the food input load (S14). Thereafter, the controller 120 determines an operating time according to the calculated food input load amount, and then determines the rotation speed of the drive gear 154 (S15). In the step of determining the rotation speed, the data in the range of the graph of FIGS. 3A to 3D may be used with the results of the experiments.

Thereafter, a process of determining whether the determined rotation speed of the drive gear 154 satisfies an appropriate range (hereinafter, referred to as a reference range) is performed (S16), and the motor unit 150 according to the rotation speed of the drive gear 154. ) And the load applied to the grinding screw 112 will affect the stability and processing efficiency of the parts. In other words, if the rotation speed of the drive gear 154 is too slow, the torque may be improved, but the efficiency of the stirring and pulverization is lowered. In addition, if the rotational speed of the drive gear 154 is too fast, the wear of the drive gear 154 and the grinding screw 112 may be promoted and problems may occur in stability.

If it is determined that the rotational speed of the drive gear 154 is too fast or too slow in step S16, the user may know a signal to adjust the food to be put through the display unit 170 (S17). In step S17, the user checks the state in which the food is accumulated in the drying furnace 110 and adjusts the amount of food to be put in place, and then operates again.

If the reference range is satisfied at step S16, the controller 120 may properly adjust the voltage supply supplied to the motor driving and sensing unit 152 through the power supply unit 134. That is, the power supply unit 134 serves as a power source of the stirring motor 156 to change the rotational speed of the drive gear 154 (S18).

Thereafter, there may be a possibility that an abnormal operation of the motor unit 150 may occur during operation. The motor driving and sensing unit 152 detects whether the stirring motor 156 and the driving gear 154 operate normally, and controls the controller 120. (S19). Here, if the rotational speed output signal detected due to the overload occurred in the motor unit 150 is out of the limit value range, there is an abnormal indication that the control unit 120 stops the rotation of the grinding screw and repeats the rotation in the opposite direction. Normal motor operation. If the motor unit does not recover within the normal operating range even after this process, the user maintains the drying furnace and the motor unit 150 (S20). After the maintenance is completed, the process goes back to step S13.

If there is no abnormality of the motor unit 150 during operation in the drying furnace 110 to continue the stirring, drying or grinding process (S21). In step S21, the control unit 120 causes the power supply of the power supply unit 134 to operate the heater 140 through the power control unit 142. In the stirring, drying or crushing step S21, the controller 120 continuously checks whether the rotation speed commanded by the controller 120 is stably satisfied (S22). Here, if it is determined that it is not satisfied again, the process of converting the rotational speed by adjusting the voltage supplied to the motor in step S18 is performed. If satisfied in step S22 it is determined whether the interior of the drying furnace 110 meets the set temperature range for each treatment step (S23). The set temperature range is to set the processing temperature individually in each step of stirring, pulverizing, drying the food, etc., which may vary depending on the type and amount of food, and is initially stored in the controller 120.

In this case, if the set temperature range is satisfied, the process is continuously performed and then the step of discharging is followed (S25). The food waste treated by the pulverization, agitation, or drying process is collected through a discharge port (not shown) which is advanced by rotation of the pulverizing screw and disposed at a lower portion of the drying furnace 110 (not shown). Can be discharged.

If it does not meet the set temperature in step S23, it is determined whether the temperature range is exceeded or less than (S24). If it is less than the temperature range, the process of raising the temperature to an appropriate level by operating the heater 140 in the process of crushing, stirring again in step S21 may be performed. If the temperature range is exceeded, there may be a problem that the interior of the drying furnace 110 is overheated, so a process of resetting the temperature conditions in the initial process execution mode input step is necessary.

As described above, the present invention by using the speed command voltage (Vsp) formed in a constant correlation depending on the rotational speed of the grinding screw during the operation of the motor unit it is possible to measure the load of food waste put into the food waste The proper rotation speed can be determined according to the load.

While preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described specific embodiments. That is, a person having ordinary knowledge in the technical field to which the present invention belongs can make a number of changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications Equivalents should be considered to be within the scope of the present invention.

1 is a conceptual diagram for a food waste processor according to the present invention;

Figure 2 is a flow chart showing a time series of driving the food waste processor according to the present invention, and

3A to 3D are graphs showing a correlation between a speed command voltage, a motor rotation speed, and a food load.

<Description of the symbols for the main parts of the drawings>

100: food waste processor 110: drying furnace

112: grinding screw 120: control unit

122: control line 124: power line

130: speed command voltage generation circuit 134: power supply

140: heater 142: power control unit

150: motor unit 152: motor driving and sensing unit

154: drive gear 156: stirring motor

160: operation panel 170: display unit

Claims (9)

Injecting food waste into a drying furnace equipped with a crushed screw in the food processor; Generating, by the controller, a speed command voltage for controlling the speed of the motor unit providing the driving force to the grinding screw; Measuring, by the controller, the load of food waste put into the drying furnace from the correlation between the speed command voltage previously input to the controller and the food load after detecting the speed command voltage; Determining a rotation speed such that the food waste can be agitated, dried or pulverized in the drying furnace according to the measured load of food waste; And And controlling the magnitude of the supply voltage so that the driving gear installed in the motor unit can drive the grinding screw. The method of claim 1, The motor of the motor unit is a food load detection method according to the speed command voltage, characterized in that the BLDC (Brushless DC) motor. The method of claim 1, The correlation between the speed command voltage and the load of food waste for the rotational speed reference value is linearly proportional to the graph with the horizontal axis being the speed command voltage and the vertical axis being the torque according to the food load. Food load detection method according to the speed command voltage. The method of claim 1, And discharging the powder-dried processed material through an outlet formed in the lower part of the drying furnace after the stirring, drying or grinding process is completed. The method of claim 1, If it is determined that the rotational speed is out of the reference range input to the control unit in the step of determining the rotational speed, the user adjusts the amount of food waste put into the drying furnace and then measures the load of food waste again. Food load detection method according to the speed command voltage. The method of claim 1, If it is determined that the rotational speed satisfies the reference range input to the controller in the step of determining the rotational speed, the control unit can adjust the rotational speed of the drive gear through a power supply connected to the motor unit. Food load detection method using the speed command voltage. The method of claim 1, If an abnormality occurs in the motor unit during the operation while adjusting the magnitude of the supply voltage, after performing maintenance, the step of measuring the load of food waste using the speed command voltage is further performed. Food load detection method using the speed command voltage. A drying furnace in which food waste is input and stirring, drying or grinding processes are performed; A grinding screw disposed in the drying furnace and having a rotating blade and a rotating blade extending in a spiral direction in a radial direction of the rotating shaft; A motor unit providing rotational power to the grinding screw; A speed command voltage generation circuit for generating a speed command voltage in response to the rotation of the motor unit; And And a controller electrically connected to the speed command voltage generation circuit. The control unit controls the rotational speed of the drive gear attached to the motor unit after measuring the load of the food waste put into the drying furnace from the correlation between the speed command voltage input in advance and the food waste load. . The method of claim 8, The motor of the motor unit is a food waste processor, characterized in that the BLDC (Brushless DC) motor.

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