JP2006159061A - Garbage treatment machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that locking/unlocking detection accuracy is not high in a conventional garbage treatment machine which detects a current flowing in a drive motor, judges an agitation blade to be in a locked state when the current is not lower than a specified values detected and applies a current to the motor for unlocking. <P>SOLUTION: The garbage treatment machine has a current detection means for detecting the current value of the driving motor 4, unlocks the agitation blade 3 when the current value detected by the current detection means is greater than a lock judging value determined in advance and changes operation of the blade 3 and tries to unlock the blade 3. The lock judging value is reduced to a smaller value as the time of unlocking operation extends longer, and therefore, the lock judging value can be kept to an appropriate value according to change in the current value accompanying rise in temperature of winding of the drive motor 4. Thus, a highly accurate lock detection can be realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a garbage processing machine for drying or microbial decomposition processing of food waste such as food, and particularly relates to lock detection of the stirring means.

In the conventional garbage processing machine, it has a processing tank for charging garbage, a stirring means for pulverizing and stirring the garbage in the processing tank, and a motor for driving the stirring means, In order to detect the lock of the stirring unit, a position detection unit of the stirring unit is provided (for example, see Patent Document 1), or the current flowing through the motor is detected, and if the current is equal to or greater than a predetermined value, It was determined that the stirring means was locked (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 2004-41918 JP 2002-263607 A

  However, in the conventional configuration, in the problem that the number of parts is increased by providing the position detection unit and the configuration becomes complicated, and in the method of determining the lock of the stirring unit based on the motor current value, the unlocking operation is performed. For this reason, when the motor is energized, the motor current value decreases due to the temperature rise of the motor winding, so that there is a problem that the accuracy of lock detection and the accuracy of lock release detection are not so high.

  The present invention solves the above-described conventional problems, and adopts a current detection method that can be made simple with a small number of parts, and takes into account changes in the motor current value due to a rise in motor winding temperature, and provides a highly accurate lock. It provides a highly reliable garbage processing machine that realizes detection and unlocking detection.

  In order to solve the above-described conventional problems, the present invention provides a treatment tank for charging garbage, a stirring means for pulverizing and stirring the garbage in the treatment tank, and a motor for driving the stirring means. And a current detection means for detecting the current of the motor, and a control means. The control means, when the current value detected by the current detection means exceeds a preset lock judgment value, the stirring means Garbage processing, characterized in that it determines that the agitation means is locked, changes the operation of the agitation means to try to release the lock, and changes the lock judgment value of the agitation means according to the unlocking operation time It was a machine.

  Normally, when the load applied to the motor increases due to the motor locking or the like, the current flowing through the motor increases. The lock is determined by the increase of the current value, but the motor winding temperature rises by repeating the unlocking operation (repeatedly flowing a large current to the motor). As a result, the current flowing to the motor decreases and the lock Even if the state continues, if it is determined that “the lock has been released”, or if the lock determination value is set high to avoid the erroneous determination as described above, the lock detection will be delayed, As a result, the motor life may be shortened.

  However, according to the configuration of the present invention, for example, the above-described problem occurs by lowering the lock determination value according to the unlocking operation time, that is, according to the temperature rise of the winding. Therefore, it is possible to perform lock detection with high accuracy.

  While adopting a current detection method that allows a simple configuration with a small number of parts, it is possible to perform highly accurate lock detection and unlock detection in consideration of changes in the motor current value due to a rise in motor winding temperature.

  1st invention detects the electric current of the processing tank which throws in garbage, the stirring means for grind | pulverizing and stirring the garbage in this processing tank, the motor for driving the said stirring means, and the said motor Current detecting means for controlling, and control means, the control means determines that the stirring means is locked when the current value detected by the current detection means exceeds a preset lock determination value, Trying to unlock by changing the operation of the stirring means, and according to the operation time of the unlocking, to change the lock judgment value of the stirring means, a garbage disposal machine, Since the lock judgment value is changed according to the unlocking operation time, that is, according to the temperature rise of the winding, it is judged that the lock has been released even though the lock state continues. Or mistakes like the above To avoid constant, set high lock determination value, the lock detection is slow, the result also eliminated to or worse shortens the motor life, those capable of performing high lock detection accuracy.

  The second invention is characterized in that the longer the unlocking operation time of the first invention is, the more the lock judgment value of the agitation means is changed in the direction of decreasing, and the more accurate lock detection can be performed. It is.

  The third invention is characterized in that the lock judgment value is changed to the original direction when the motor current value decreasing speed during the unlocking operation of the first or second invention is equal to or higher than a predetermined value. Is. When the motor current value decreases rapidly, it means that the lock has been released, so by returning the lock judgment value to the original value, the lock judgment can be released at an early stage to return to the normal stirring operation. Can do. This also improves the accuracy of the unlocking determination.

  According to a fourth aspect of the present invention, the amount of change in the lock determination value is corrected according to the motor current value during the unlocking operation of any one of the first to third aspects of the invention. Since it is possible to make a determination in consideration of the difference in the winding temperature rise speed due to the difference in the current value flowing through the coil, it is possible to detect the lock with higher accuracy.

  The fifth invention is characterized in that the pattern of the unlocking operation is changed according to the time for performing the unlocking operation of any one of the first to fourth inventions and / or the motor current value during the unlocking operation. For example, when the unlocking operation time is long, that is, when the winding temperature is high, the motor life is reduced as much as possible by changing the operation pattern so that the motor is intermittently energized. It can be reduced and reliability is improved.

  In a sixth aspect of the present invention, when the motor current value falls below the lock determination value during the unlocking operation of any one of the first to fifth inventions, the unlocking operation is terminated and the operation of the stirring means is changed to the normal operation. The lock determination value is changed in a direction to return to the original state according to the elapsed time from the end of the unlocking operation, and the lock determination value according to the decrease in winding temperature after unlocking Therefore, highly accurate lock detection can be performed from the time of unlocking until the winding temperature is stabilized.

  According to a seventh aspect of the invention, the amount of change in the lock determination value is corrected according to the motor current value after the end of the unlocking operation of the sixth aspect of the invention. Since it is possible to make a determination in consideration of the difference in winding temperature decrease speed due to the difference, lock detection with higher accuracy can be performed.

  In an eighth aspect of the invention, when the stirring means of any one of the first to seventh inventions is not locked, the stirring means is intermittently driven, and the intermittent period and / or the driving time is set according to the operating situation. The lock judgment value is changed according to the drive time per unit time of the agitating means, and the judgment can be made in consideration of the increase in the winding temperature of the lock. Can detect the lock.

  The ninth invention is characterized in that the amount of change in the lock determination value is corrected according to the motor current value when the agitating means of the eighth invention is driven, and flows to the motor. Since it is possible to make a determination in consideration of the difference in winding temperature rise speed due to the difference in current value, lock detection with higher accuracy can be performed.

  A tenth aspect of the invention is a treatment tank for charging garbage, a stirring means for pulverizing and stirring the garbage in the treatment tank, a motor for driving the stirring means, and a current of the motor are detected. A current detection means for detecting the temperature of the winding of the motor, and a control means. The control means is a lock judgment in which the current value detected by the current detection means is preset. When the value is exceeded, it is determined that the stirring means is locked, and the unlocking is attempted by changing the operation of the stirring means, and the lock determination value of the stirring means is set according to the temperature detected by the temperature detecting means. It is a garbage processing machine characterized by changing, and although the number of parts is increased, the lock judgment value can be changed by directly monitoring the winding temperature, so that lock detection can be performed with high accuracy.

  In an eleventh aspect of the present invention, when the rate of increase in the motor winding temperature during the unlocking operation of the tenth aspect of the invention is less than a predetermined value set in advance, the lock judgment value is changed back to the original direction. It is a characteristic and directly monitors the decrease in winding temperature, so that it is possible to make a highly accurate unlock determination.

  The twelfth invention is characterized in that the change amount of the lock judgment value is corrected according to the motor winding temperature during the unlocking operation of the eleventh invention, and the judgment value change amount according to the winding temperature. The system for determining unlocking is further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

(Embodiment 1)
Hereinafter, the garbage processing machine in the 1st Embodiment of this invention is demonstrated, referring FIGS. 1-3. FIG. 1 is a cross-sectional view showing an outline of a garbage disposal machine in the present embodiment.

  A treatment tank 1 for throwing in garbage, a drying heater 2 for heating and drying the garbage in the treatment tank 1, and a drying for sending heat of the drying heater 2 to the garbage in the treatment tank 1 A fan motor 10, a stirring blade 3 for stirring the garbage in the processing tank 1, a drive motor 4 provided under the processing tank 1 for rotating the stirring blade 3, and the processing tank 1 A catalyst 6 for deodorizing steam generated from the garbage in the treatment tank 1, a catalyst heater 7 for heating to increase the deodorizing ability of the catalyst 6, and a downstream side of the catalyst 6. And a suction fan motor 9 for sucking the steam in the processing tank 1 and exhausting it outside the apparatus via the catalyst 6.

  Further, an in-compartment temperature sensor 5 for detecting the temperature in the processing tank 1 disposed near the drying heater 2 and a catalyst temperature sensor for detecting the temperature of the catalyst 6 disposed near the catalyst 6 side. 8. The drying heater 2, the drying fan motor 10, the drive motor 4, the catalyst heating heater 7, the suction fan motor 9, the internal temperature sensor 5 and the catalyst temperature sensor 8 are all electrically connected to a control board 12 arranged at the lower rear of the main body. Connected to each other and controlled by the control board 12.

  FIG. 2 is a system block diagram of the control board 12, in which an operation switch 14 and a power supply relay 15 are provided in parallel with the operation switch 14 in the power supply path from the commercial power supply 13, and the operation switch 14 or the power supply By turning on the relay 15, power is supplied from the commercial power supply 13 to the signal control means 16 and the drying heater 2, the catalyst heater 7, the drive motor 4, the suction fan motor 9, and the drying fan motor 10. Yes. The signal control means 16 includes a current detection means 17 for detecting a current value flowing through the drive motor 4, an internal temperature sensor 5, a catalyst temperature sensor 8, and a drive means 18 for controlling each load. The switch 19, the operation display 20, and the power relay 15 are connected.

  Next, the operation and action of the above configuration will be described with reference to FIGS.

  FIG. 3 is an outline of the control operation of the garbage disposal machine in the present embodiment.

  In step 0, the signal control means 16 turns on the power supply relay 15 at the same time as power is supplied, and starts counting up the operation timer.

  Next, in step 1, in order to maintain the deodorizing performance of the catalyst 6, the catalyst heater 7 is controlled via the driving means 18 so that the catalyst temperature sensor 8 becomes about 360 ° C.

  Next, in step 2, if the operation timer exceeds 4 minutes (that is, if the catalyst 6 is sufficiently heated to exhibit the deodorizing ability), the drying fan motor 10 is turned on, The heat drying process is started and the suction fan motor 9 is turned on to exhaust the steam in the processing tank 1 and the process proceeds to Step 3. If the operation timer is within 4 minutes, proceed to Step 8 without doing anything.

  In step 3, the drive motor 4 is controlled to stir and grind the garbage (details will be described later).

  Next, in step 4, it is determined whether or not cooling is in progress (described later). If cooling is in progress, the process proceeds to step 7;

  Next, in step 5, the drying heater 2 is controlled to perform a heat drying process. In order to maintain the drying performance, the drying heater 2 is controlled via the driving means 18 so that the internal temperature sensor 5 becomes about 120 ° C. Specifically, when the internal temperature sensor 5 is lower than 120 ° C., the drying heater 2 is fully energized, and when it is 120 ° C. or higher, the energization state is about 30% to keep the temperature constant. ing. While a large amount of steam is generated while the garbage in the treatment tank 1 is undried, the temperature in the treatment tank 1 is reduced to below 120 ° C. if the energized state is about 30%. When the garbage in the treatment tank 1 is sufficiently dried, the amount of steam is reduced, so that the temperature in the treatment tank 1 continues to rise without decreasing even in an energized state of about 30%.

  In step 6, the end of drying is determined using the above characteristics. Specifically, when the temperature in the processing tank 1 exceeds 130 ° C., it is determined that the drying is finished, and thereafter, the drying heater 2 is turned off and the cooling process in the processing tank 1 is performed.

  Step 7 is specific control of the cooling process. During cooling, the power supply to the drying heater 2 is stopped, and the operation display 20 is turned off when the temperature in the treatment tank 1 is less than 80 ° C. (a temperature at which no one is touched and burns), The power supply relay 15 is turned off to stop the power supply to the system.

  In step 8, it is always determined whether or not the off switch 19 is pressed. If the off switch 8 is pressed, the operation display 20 is turned off and the power The relay 15 is turned off to stop the power supply to the system.

  The above is the outline of the control operation of the present embodiment. Hereinafter, detailed description of the stirring control in step 3 will be described with reference to FIGS. 4 and 5.

  First, in step 3.1, the stirring timer counts up and the judgment value change timer counts up, and the stirring pattern is determined according to the following table according to the operation status.

  Next, at step 3.2, if the judgment value change timer reaches 30 minutes or the judgment value is not set, the judgment value change timer is cleared and judgment value change processing 1 is performed according to the following procedure.

  The determination value changing process 1 changes the process according to the relationship between the “lock determination lower limit value” for each stirring pattern shown in the following table and the current lock determination value.

<Determination value changing process 1>
1) When “current lock judgment value> lock judgment lower limit value”,
(Current lock determination value) −0.5 × (Current lock determination value−Current value when driving the previous drive motor 4)
Is a new lock judgment value. However, when the lock judgment value newly set here is smaller than the “lock judgment lower limit value” for each stirring pattern shown in the following table, the “lock judgment lower limit value” shown in the following table is used as the new lock judgment value. To do.

2) In case of “current lock judgment value <= lock judgment lower limit value” (current lock judgment value) + 0.5 × (current lock judgment value−current value at the time of driving the previous drive motor 4)
Is a new lock judgment value. However, if the lock judgment value newly set here is larger than the “lock judgment lower limit value” for each stirring pattern shown in the table below, the “lock judgment lower limit value” shown in the table below is used as the new lock judgment value. To do.

  3) When the lock determination value is not set, 5A is set as a new lock determination value.

  Next, in step 3.3, it is determined whether or not the stirring is locked. If the stirring is locked, an unlocking operation (details will be described later) is performed, and if not locked, the process proceeds to step 3.4.

  Next, in steps 3.4 to 3.7, the drive motor 4 is controlled according to the stirring pattern set in step 3.2 described above. That is, forward and reverse stirring is alternately performed for a predetermined time every stirring cycle.

  Further, at this time, when the drive motor 4 is being driven, the agitation lock determination is performed in the following steps 3.8 to 3.9. If the current value detected by the current detection means 17 exceeds the lock determination value 3 seconds after the drive motor 4 starts driving (that is, when the current of the drive motor is stabilized), it is determined that the stirring blade 3 is locked. Thereafter, an unlocking operation (details will be described later) is performed.

  Next, details of the unlocking operation will be described with reference to FIG.

  In step 3.3.1, the lock timer is counted up and the agitation pattern of the unlocking operation is determined according to the following table.

  Next, in step 3.3.2, if the lock timer has reached 30 minutes, the lock timer is cleared and determination value change processing 2 is performed according to the following procedure.

<Determination value changing process 2>
(Current lock judgment value) −0.5 × (Current value at the time of previous driving motor 4 driving−Current lock judgment value)
Is a new lock judgment value. However, when the lock determination value newly set here is less than 3A, 3A is set as a new lock determination value.

  Next, in step 3.3.3 to step 3.3.9, the drive motor 4 is controlled according to the stirring pattern set in step 3.1 described above. That is, for each agitation cycle, normal rotation and reverse rotation are alternately performed for 3 seconds.

  Further, at this time, the lock release determination is performed when the stirring timer reaches 3 seconds (that is, when the current of the drive motor is stabilized). In step 3.3.6, if the current value detected by the current detection means 17 is less than the lock determination value, it is determined that the agitation blade 3 is unlocked, and thereafter the normal operation is resumed.

  In addition, after step 3.3.6, if the current value at this time is 1 A or more lower than the current value at the time of driving the drive motor 4 in step 3.3.7, the lock is released. A process of returning the lock determination value to the original is performed by determining that the lock is being reduced (the degree of lock is lighter). The process for returning the lock judgment value is the same as the judgment value changing process 1 in step 3.3.2 described above.

  The effect | action by the above structure is shown below.

  When the state where the stirring blade 3 is locked in Step 3.3.2 continues, the lock judgment value is reset low every 30 minutes, and the lock judgment value is set according to the current when the drive motor 4 is driven. Since the motor winding temperature rises due to the continuation of the lock state of the stirring blade 3 and the lock judgment value corresponding to the current value that decreases as a result can always be maintained. It is not determined that “the lock has been released” despite the fact that the lock has been continued, and the lock can be detected with high accuracy. In step 3.3.7, when the current value reduction rate is large (that is, when the load applied to the drive motor 4 is lightened), the lock judgment value is returned to the original value, thereby providing an early stage. Thus, the lock determination can be canceled to return to the normal stirring operation, and the accuracy of the lock release determination is also improved. In Step 3.3.1, the stirring pattern is changed according to the current lock judgment value (that is, depending on the lock duration time and the current value), and when the winding temperature rises, the drive motor 4 is changed accordingly. Is stopped for a long time to prevent the winding temperature from rising and prevent the motor life from decreasing. Furthermore, in step 3.2, the lock judgment value is reset according to the drive pattern of the drive motor 4 (drive time per unit time) and its current value even during normal operation. A lock judgment value can be returned in response to a subsequent decrease in winding temperature, and even during normal operation, a determination that takes into account the difference in winding temperature rise speed can be taken into account, enabling even more accurate lock detection It is.

  In this embodiment, the lock determination value is changed every 30 minutes, and the change amount of the determination value is changed according to the motor current value. Instead of changing the change amount of the determination value, the lock determination value is changed. The same effect can be obtained even if the change time of the judgment value is changed.

(Embodiment 2)
Hereinafter, the garbage processing machine in the 2nd Embodiment of this invention is demonstrated, referring FIGS. 6-8. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 6 is a system block diagram of the control board 12. The signal control means 16 includes a winding temperature sensor 11 built in the drive motor 4 for measuring the winding temperature of the drive motor 4 and the outside air temperature. An outside air temperature sensor 21 to be measured is connected.

  Next, the operation and action of the above configuration will be described with reference to FIGS.

  In step 03.2, the lock determination value is set according to the temperature in the winding temperature sensor 11 according to the following table. (Judgment value changing process 3) However, at this time, correction is made based on the value of the outside air temperature sensor 21. Specifically, the lock determination value is indirectly corrected by adding (outside temperature sensor temperature−20 ° C.) to the winding temperature shown in the table below.

  Furthermore, when the lock timer reaches 30 minutes in step 03.3.2, the determination value changing process 3 similar to that in step 03.2 is performed. Note that the judgment value changing process is not always performed during locking, and is performed every 30 minutes until the winding temperature decreases (30 minutes), set in step 03.3.7, which will be described later. This is to reflect the judgment value in the operation.

  Furthermore, in step 03.3.7, if the current winding temperature has decreased by 10 ° C. or more compared to the winding temperature at the time of driving the drive motor 4 at the previous lock determination value setting (30 minutes before), It is determined that the lock is being released (the degree of lock is lighter), and a process for returning the lock determination value is performed (determination value changing process 4). The change amount of the lock determination value at this time is set according to the following table, and the set change amount is added to the lock determination value set in step 03.3.1. However, at this time, correction is applied according to the value of the outside air temperature sensor 21. Specifically, the lock determination value change amount is indirectly corrected by adding (outside temperature sensor temperature−20 ° C.) to the current winding temperature in the table below.

  The effect | action by the above structure is shown below.

  In step 03.2 and step 03.3.1, the lock judgment value is set according to the following table according to the temperature of the winding temperature sensor 11, so that the lock judgment value can be changed by directly monitoring the winding temperature. High-precision lock detection can be performed. In step 03.3.7, the unlocking is detected based on the amount of decrease in the winding temperature, and the lock judgment value is returned to the original value, so that the unlocking judgment can be performed with high accuracy. Further, since the lock determination value change is corrected by the outside air temperature sensor 21, it is possible to make a determination in consideration of the difference in the motor winding temperature rise speed depending on the outside air temperature, that is, the use environment, and the highly reliable lock detection and It can be used for unlock determination.

  As described above, the garbage processing machine according to the present invention can perform highly accurate lock detection and unlock detection in consideration of changes in the motor current value due to a rise in motor winding temperature, and uses an induction motor. The present invention can also be applied to other equipment that requires a stirring device.

Schematic sectional view of a garbage disposal machine in Embodiment 1 of the present invention Block diagram showing the system of the same garbage processor Control flow chart showing the outline of control of the same garbage processor Control flowchart showing details of drive motor control of the same garbage processor Control flowchart showing details of unlocking operation of the same garbage processor The block diagram which shows the system of the garbage processing machine in Embodiment 2 of this invention Control flowchart showing details of drive motor control of the same garbage processor Control flow chart showing details of unlocking operation of same garbage treatment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Treatment tank 2 Drying heater 3 Stirring blade 4 Drive motor 5 Chamber temperature sensor 6 Catalyst 7 Catalyst heating heater 8 Catalyst temperature sensor 9 Suction fan motor 10 Drying fan motor 11 Winding temperature sensor 12 Control board 13 Commercial power supply 14 Operation switch 15 Power relay 16 Signal control means 17 Current detection means 18 Drive means 19 Off switch 20 Operation display 21 Outside temperature sensor

Claims (12)

A treatment tank for charging garbage, a stirring means for pulverizing and stirring the garbage in the treatment tank, a motor for driving the stirring means, and a current detection means for detecting the current of the motor And the control means, the control means determines that the stirring means is locked when the current value detected by the current detection means exceeds a preset lock judgment value, and performs the operation of the stirring means. A garbage disposal machine characterized by changing and attempting to release the lock, and changing the lock judgment value of the stirring means in accordance with the unlocking operation time. The garbage processing machine according to claim 1, wherein the longer the unlocking operation time, the smaller the lock judgment value of the stirring means is changed. The garbage processing machine according to claim 1 or 2, wherein when the rate of decrease of the motor current value during the unlocking operation is equal to or greater than a predetermined value, the lock judgment value is changed back to the original direction. . The garbage processing machine according to any one of claims 1 to 3, wherein the change amount of the lock determination value is corrected according to the motor current value during the unlocking operation. The garbage disposal machine according to any one of claims 1 to 4, wherein a pattern of the unlocking operation is changed according to a time for performing the unlocking operation and / or a motor current value during the unlocking operation. . If the motor current value falls below the lock judgment value during the unlocking operation, the unlocking operation is terminated and the agitating means returns to the normal operation, and the elapsed time from the end of the unlocking operation is determined. The garbage disposal machine according to any one of claims 1 to 5, wherein the lock judgment value is changed in a direction to restore the original value. The garbage processing machine according to claim 6, wherein the amount of change in the lock determination value is corrected in accordance with the motor current value after the unlocking operation is completed. When the agitation means is not locked, the agitation means is intermittently driven, and the intermittent period and / or drive time is changed according to the operating condition, and the agitation means is locked according to the drive time per unit time of the agitation means. The garbage disposal according to any one of claims 1 to 7, wherein the judgment value is changed. 9. The garbage processing machine according to claim 8, wherein the amount of change of the lock judgment value is corrected according to the motor current value when the stirring means is driven. A treatment tank for charging garbage, a stirring means for pulverizing and stirring the garbage in the treatment tank, a motor for driving the stirring means, and a current detection means for detecting the current of the motor And a temperature detection means for detecting the winding temperature of the motor, and a control means. The control means performs the stirring when the current value detected by the current detection means exceeds a preset lock judgment value. It is determined that the means is locked, the unlocking is attempted by changing the operation of the stirring means, and the lock judgment value of the stirring means is changed according to the temperature detected by the temperature detecting means. Garbage disposal machine. 11. The lock judgment value is changed in a direction to return to the original value when the rate of increase in the winding temperature of the motor during the unlocking operation is less than a predetermined value set in advance. Garbage disposal machine. 12. The garbage processing machine according to claim 11, wherein the change amount of the lock judgment value is corrected according to the winding temperature of the motor during the unlocking operation.

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