JP2007143935A - Device for producing powder of coffee raw material - Google Patents

Device for producing powder of coffee raw material Download PDF

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Publication number
JP2007143935A
JP2007143935A JP2005343628A JP2005343628A JP2007143935A JP 2007143935 A JP2007143935 A JP 2007143935A JP 2005343628 A JP2005343628 A JP 2005343628A JP 2005343628 A JP2005343628 A JP 2005343628A JP 2007143935 A JP2007143935 A JP 2007143935A
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coffee
raw
powder
current value
mill
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JP2005343628A
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Japanese (ja)
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Noboru Chigira
登 千木良
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Fuji Electric Retail Systems Co Ltd
富士電機リテイルシステムズ株式会社
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Abstract

The present invention provides a coffee raw material powder producing apparatus capable of reducing the manufacturing cost while ensuring the measurement accuracy of raw material powder when pulverizing coffee beans to produce a predetermined amount of raw material powder.
An apparatus for producing coffee raw material powder includes a controller. The controller 10 starts the coffee mill 3 (step 10) and reads the integrated current value SUMI calculated by the current value integration circuit 8 when the execution condition of the sales operation is satisfied (when step 1 is YES) (step 10). Step 5) Based on the input signal from the rotary encoder 7, the number of rotations N of the mill motor 3b of the coffee mill 3 is integrated from the start to calculate the total number of rotations SUMN (Step 6), and SUMN2 ≦ SUMN < When SUMN1 & SUMI ≧ SUMI2 or SUMN <SUMN2 & SUMI ≧ SUMI1 is established, the coffee mill 3 is stopped (steps 8 to 12).
[Selection] Figure 3

Description

  The present invention relates to a coffee raw material powder production apparatus for producing a raw material powder by pulverizing coffee beans in order to extract a coffee beverage.

  Conventionally, what was described in patent document 1 is known as a preparation apparatus of this kind of coffee raw material powder | flour. This production device was applied to a cup-type vending machine. A variable-capacity measuring device that accurately measures coffee beans, a measuring device motor that changes the capacity of the measuring device, and a rotation of the measuring device motor. There are a rotary encoder that detects the state, an electric coffee mill that pulverizes coffee beans supplied from a weighing machine to produce raw powder of a predetermined particle size, and the above weighing machine motor, rotary encoder, and coffee mill. An electrically connected control unit is provided. In addition, the cup type vending machine includes a storage unit that stores the raw coffee beans, an electric delivery device that sends the coffee beans in the storage unit to the measuring device, and a coffee that extracts the coffee beverage from the raw powder via hot water. It has a beverage extractor.

  In this production apparatus, when the coffee beverage is sold, the control unit drives the delivery machine, the meter motor, the coffee mill, and the like as described below to produce the raw material powder. First, by measuring the meter motor based on the detection signal of the rotary encoder, the capacity of the meter is set so that the coffee beans necessary for this beverage sale can be appropriately supplied to the coffee mill. Thereafter, the coffee beans in the container are sent to the measuring device via the sending device, and the sending device is stopped when a predetermined amount of coffee beans enters the measuring device. Next, by driving the meter motor again, the shutter between the container and the meter is closed, and then the lower door of the meter is opened, so that the coffee beans in the meter are transferred to the coffee mill. Supply. And a predetermined amount of raw material powder is produced by driving a coffee mill.

JP 2002-186558 A

  According to the above conventional coffee raw material powder production apparatus, a variable capacity type measuring instrument is used to accurately measure coffee beans and produce raw material powder, so a meter motor and a rotary encoder are required. Therefore, there is a problem that the manufacturing cost increases accordingly.

  The present invention has been made to solve the above problems, and in the case of producing a predetermined amount of raw material powder by pulverizing coffee beans, it is possible to reduce the manufacturing cost while ensuring the measurement accuracy of the raw material powder. An object of the present invention is to provide an apparatus for producing a coffee raw material powder.

  In order to achieve the above object, the invention according to claim 1 is an apparatus for producing coffee raw material powder for pulverizing coffee beans to produce a predetermined amount of raw material powder for extracting a coffee beverage, comprising: An electric coffee mill that pulverizes coffee beans by the rotation of an electric motor to produce raw powder, a rotational speed detection means that detects the rotational speed of the electric motor, and the detected rotational speed when the coffee mill starts The integrated rotational speed calculating means for calculating the integrated rotational speed by integrating the current value, the current value detecting means for detecting the value of the current flowing through the motor, and the integrated current value based on the detected current value when the coffee mill is started. The integrated current value calculating means for calculating from the above, and starting the coffee mill when a predetermined condition is satisfied, and stopping the coffee mill according to the calculated integrated rotational speed and the calculated integrated current value And control means that, characterized in that it comprises a.

  According to this coffee raw material powder producing apparatus, the coffee mill is started when a predetermined condition is satisfied, and after the start of the coffee mill, the accumulated rotational speed is calculated by integrating the number of rotations of the electric motor. The current value is calculated based on the value of the current flowing through the electric motor, and the coffee mill in the operating state is stopped according to the accumulated rotation speed and the accumulated current value. In this case, the accumulated rotational speed represents the amount of raw material powder produced by the coffee mill, but may include the rotational speed in the idling state that does not contribute to the production of raw material powder. When the production amount of the raw material powder is measured based only on the accumulated rotational speed, the measurement accuracy may not necessarily be high. On the other hand, the accumulated current value represents the actual work in the electric motor of the coffee mill. Therefore, by controlling the operation / stop of the coffee mill according to these accumulated rotation speed and accumulated current value, It is possible to produce a predetermined amount of raw material powder while accurately measuring the raw material powder actually produced by the coffee mill, eliminating the influence of the rotational speed that does not contribute to the production. That is, it is possible to produce a predetermined amount of raw material powder while accurately measuring it without using an expensive variable capacity type measuring instrument as in the prior art, and the manufacturing cost can be reduced accordingly.

  The invention according to claim 2 is an apparatus for producing coffee raw material powder that pulverizes coffee beans to produce a predetermined amount of raw material powder to extract coffee beverage, and has an electric motor, and the coffee is produced by rotation of the electric motor. An electric coffee mill that pulverizes beans to produce raw powder, a quantitative meter that measures a certain amount of raw powder less than a predetermined amount, and a number of motor rotations. A rotational speed detecting means for detecting, an integrated rotational speed calculating means for calculating the cumulative rotational speed by integrating the detected rotational speed from the start of the coffee mill, and starting the coffee mill when a predetermined condition is satisfied And a control means for stopping the coffee mill according to the calculated integrated rotational speed and a predetermined amount of the measuring device.

  According to this coffee raw material powder production apparatus, the coffee mill is started when a predetermined condition is established, and the cumulative number of rotations is calculated by integrating the number of rotations of the electric motor from the start of the coffee mill, The coffee mill in the operating state is stopped according to the total number of rotations and a certain amount of the meter. Therefore, when preparing a predetermined amount of raw material powder with a coffee mill, for example, only a smaller amount of raw material powder that exceeds a certain amount of the measuring device is measured according to the total number of revolutions, so that the measurement accuracy is low. However, as compared with the case where all the raw material powders are weighed according to the total number of revolutions, the raw material powder actually produced by the coffee mill is accurately measured, and a predetermined amount of raw material powders are produced. Can do. In other words, it is possible to produce a predetermined amount of raw material powder while ensuring a certain level of measurement accuracy without using an expensive variable capacity type weighing instrument as in the past, thereby reducing the manufacturing cost accordingly. it can.

  According to a third aspect of the present invention, there is provided the coffee raw material powder producing apparatus according to the second aspect, wherein the current value detecting means for detecting the value of the current flowing through the electric motor and the integrated current value based on the detected current value. And an integrated current value calculating means for calculating from the start of the mill, wherein the control means further stops the coffee mill in accordance with the calculated integrated current value.

  According to this coffee raw material powder producing apparatus, the accumulated current value is calculated from the start of the coffee mill based on the value of the current flowing through the electric motor, and the coffee mill in the operating state is further according to the accumulated current value. Stopped. As described above, the cumulative number of rotations represents the amount of coffee beans produced by the coffee mill, but may include the number of rotations in the idling state that does not contribute to the production of raw material powder. When the amount of raw material powder produced by the mill is measured based only on the cumulative number of revolutions, the measurement accuracy may not necessarily be high. On the other hand, since the accumulated current value represents the actual work in the electric motor of the coffee mill, in addition to the accumulated rotation speed and a certain amount of meter, the operation / stop of the coffee mill is controlled further according to the accumulated current value. By doing so, it is possible to produce a predetermined amount of raw material powder while eliminating the influence of the rotational speed that does not contribute to the production of the raw material powder and increasing the measurement accuracy of the raw material powder actually produced by the coffee mill.

  According to a fourth aspect of the present invention, in the coffee raw material powder producing apparatus according to the first or third aspect, the integrated current value calculating means includes the detected current value and a predetermined no load when the motor is in an unloaded state. The integrated current value is calculated by integrating the deviation from the current value.

  According to this coffee raw material powder production apparatus, the integrated current value is calculated by integrating the deviation between the detected current value and a predetermined no-load current value when the electric motor is in the no-load state. This integrated current value can be calculated as representing a substantial work in the electric motor of the coffee mill. Therefore, by controlling the operation / stop of the coffee mill according to such an integrated current value, the weighing accuracy of the raw material powder can be maintained at a high level.

  Hereinafter, a coffee raw material powder producing apparatus according to a first embodiment of the present invention will be described with reference to the drawings. The coffee raw material powder producing apparatus of this embodiment is applied to a cup-type vending machine (not shown). As shown in FIG. 1, the coffee raw material powder producing apparatus 1 includes a canister 2 for storing raw coffee beans, a coffee mill 3 provided integrally below the canister 2, and the like.

  The canister 2 has an upper opening 2a and a lower opening (not shown). In the canister 2, coffee beans are replenished from the upper opening 2 a, and the coffee beans accommodated in the canister 2 are moved by the own weight of the coffee beans 3 through the lower opening during the operation of the coffee mill 3. Move into 3a.

  The coffee mill 3 pulverizes coffee beans to produce raw material powder, and includes a mill mechanism 3a and a mill motor 3b (electric motor). In the mill mechanism 3a, fixed teeth and rotating teeth (both not shown) are provided, and the rotating teeth are concentrically fixed to a rotating shaft (not shown) of the mill motor 3b. In the coffee mill 3, the rotating teeth rotate according to the rotation of the mill motor 3b, and the coffee beans that have entered between the fixed teeth are crushed to produce raw material powder.

  Further, the coffee mill 3 is provided with a particle size adjusting mechanism (not shown), and the particle size of the raw material powder is adjusted within a predetermined range by the particle size adjusting mechanism. Moreover, the mill mechanism 3a has the raw material powder discharge port 3c which protrudes below, and the raw material powder produced as mentioned above is discharge | released below via the raw material powder discharge port 3c.

  In the cup type vending machine, the coffee beverage extractor 4 is disposed below the mill mechanism 3a. The coffee beverage extractor 4 has a raw material chute 4a that opens upward, and the raw material powder discharged from the raw material powder discharge port 3c of the coffee mill 3 passes through the raw material chute 4a in the coffee beverage extractor 4 To be supplied. In the coffee beverage extractor 4, hot water is supplied from a hot water supply system (not shown), and the coffee beverage is extracted from the raw material powder through the hot water.

  On the other hand, as shown in FIG. 2, the coffee raw material powder producing apparatus 1 further includes a breaker 5, a rectifier 6, a rotary encoder 7, a current value integrating circuit 8, a relay 9, and a controller 10. The aforementioned mill motor 3b is configured by a DC motor, and power from the AC 100V power source is supplied to the mill motor 3b via the breaker 5 and the rectifier 6.

  The rotary encoder 7 (rotational speed detection means) is attached to the mill motor 3b and outputs a signal representing the rotational speed N of the mill motor 3b to the controller 10. The controller 10 calculates the integrated rotational speed SUMN by integrating the rotational speed N represented by the signal input from the rotary encoder 7 from the start of rotation of the mill motor 3b. Although this cumulative rotation number SUMN represents the amount of raw material powder produced by the coffee mill 3, there is a possibility that it includes the rotation number in an idling state that does not contribute to the production of raw material powder. When the amount of raw material powder produced by the coffee mill 3 is measured based only on the cumulative rotation number SUMN, the measurement accuracy is not necessarily high.

  Further, the relay 9 is of a contact type, and is turned ON / OFF by the controller 10 to rotate / stop the mill motor 3b.

  The current value integrating circuit 8 is provided between the mill motor 3b and the relay 7, and detects a current value (hereinafter referred to as "current value") I flowing through the mill motor 3b. Based on the current value I, The integrated current value SUMI is calculated and a signal representing it is output to the controller 10.

  This integrated current value SUMI represents the work actually performed by the mill motor 3b. Specifically, when the value of the current that flows when the mill motor 3b is in the no-load state is the no-load current value IREF, The deviation (I-IREF) between the value I and the no-load current value IREF is calculated by integrating from the start of rotation of the mill motor 3b. Further, the integrated current value SUMI is reset to 0 in the current value integration circuit 8 when the relay 9 is turned off and the mill motor 3b is stopped. In the present embodiment, the current value integration circuit 8 corresponds to a current value detection unit and an integrated current value calculation unit.

  The controller 10 is electrically connected to a large number of product selection switches 11 (only one is shown) and a cash detection device 12. Each product selection switch 11 is used to select a coffee beverage to be purchased by the product purchaser, and outputs an ON signal to the controller 10 when pressed by the product purchaser, and an OFF signal otherwise. Output to the controller 10. Further, the cash detection device 12 detects that predetermined cash has been thrown into the cup type vending machine by the product purchaser, and outputs a signal representing it to the controller 10.

  On the other hand, the controller 10 is composed of a microcomputer comprising a CPU, RAM, ROM and I / O interface (all not shown), and the rotary encoder 7, current value integration circuit 8, and product selection switch 11 described above. And according to the input signal from the cash detection apparatus 12, the coffee mill 3 is controlled so that it may mention later. In the present embodiment, the controller 10 corresponds to an integrated rotational speed calculation unit and a control unit.

  Next, the control process of the coffee mill 3 executed by the controller 10 will be described with reference to FIG. In this process, as described below, by controlling the coffee mill 3, a raw material powder for a predetermined amount (predetermined weight) MCMD necessary for extracting the coffee beverage selected by the product purchaser is prepared. And is executed at a predetermined control cycle.

  In this control process, first, in step 1 (abbreviated as “S1” in the figure, the same applies hereinafter), it is determined whether or not the sales flag F_SALE is “1”. The sales flag F_SALE is set to “1” when the execution condition of the sales operation is satisfied, that is, when a predetermined cash is put into the cup type vending machine and the product selection switch 11 is pressed by the product purchaser, Otherwise, it is set to “0”. When the determination result of step 1 is NO, this process is ended as it is.

  On the other hand, when the determination result in step 1 is YES, it is determined that the coffee beverage sales operation should be executed, and the process proceeds to step 2 to determine whether or not the threshold flag F_REF is “1”. . When the determination result is NO, it is determined that the threshold value should be set, and the process proceeds to step 3 where the first and second rotation speed threshold values SUMN1 and SUMN2 and the first and second current threshold values are set. The values SUMI1 and SUMI2 are set.

  Specifically, these four thresholds SUMN1, SUMN2, SUMI1, and SUMI2 all extract coffee beverages (hereinafter referred to as “currently sold beverages”) corresponding to the product selection switch 11 that has been pressed this time. In accordance with a predetermined amount MCMD of the raw material powder necessary for the above, it is set by searching four maps (not shown). The first and second rotational speed threshold values SUMN1 and SUMN2 are set so that SUMN2 = 0.8 × SUMN1 is established, and the first and second current threshold values SUMI1 and SUMI2 are set to SUMI2 = 0. 85 × SUMI1 is set to hold.

  After the four threshold values are set in step 3 as described above, in step 4, a threshold flag F_REF is set to “1” to represent it. As a result, the determination result in step 2 is YES in the next loop. In this case, steps 3 and 4 are skipped and the process proceeds to step 5.

  In step 5 following step 2 or 4, the value of the integrated current value SUMI represented by the input signal from the current value integration circuit 8 is read. Thereafter, in step 6, based on the input signal from the rotary encoder 7, the integrated rotational speed SUMN is calculated.

  Next, the routine proceeds to step 7, where it is determined whether or not the integrated rotational speed SUMN calculated at step 6 is equal to or higher than the first rotational speed threshold value SUMN1 set at step 3. When the determination result is NO, the process proceeds to step 8 and it is determined whether or not the integrated rotation speed SUMN is equal to or higher than the second rotation speed threshold value SUMN2 set in step 3.

  If the determination result is NO, the process proceeds to step 9 to determine whether or not the integrated current value SUMI read in step 5 is equal to or greater than the first current threshold value SUMI1 set in step 3. When the determination result is NO and SUMN <SUMN2 and SUMI <SUMI1 are satisfied, the accumulated rotational speed of the mill motor 3b does not reach a sufficient value and the work of the mill motor 3b is insufficient. It is determined that the production amount of the raw material powder by the mill 3 has not yet reached the predetermined amount MCMD described above, the process proceeds to step 10 and the relay 9 is turned on. Thereby, the operation of the coffee mill 3 is continued. Thereafter, this process is terminated.

  On the other hand, when the determination result in step 9 is YES and SUMN <SUMN2 and SUMI ≧ SUMI1 are satisfied, the work of the mill motor 3b has reached a sufficient value. It is determined that the predetermined amount MCMD has been reached, and the process proceeds to step 12 where the relay 9 is turned off. Thereby, the operation of the coffee mill 3 is stopped.

  Next, at step 13, both the sales flag F_SALE and the threshold flag F_REF described above are set to “0”, and the accumulated rotational speed SUMN is reset to the value 0. Thereafter, this process is terminated.

  On the other hand, when the determination result in step 8 is YES, the process proceeds to step 11 to determine whether or not the integrated current value SUMI is equal to or greater than the second current threshold value SUMI2 set in step 3. When the determination result is NO and SUMN2 ≦ SUMN <SUMN1 and SUMI <SUMI2 are satisfied, the accumulated rotational speed SUMN of the mill motor 3b has reached a sufficient value, but the work of the mill motor 3b is insufficient. Thus, it is determined that the amount of raw material powder produced by the coffee mill 3 has not yet reached the predetermined amount MCMD, and after executing step 10 as described above, the present process is terminated.

  On the other hand, when the determination result in step 11 is YES and SUMN2 ≦ SUMN <SUMN1 and SUMI ≧ SUMI2 are satisfied, the mill motor 3b has accumulated a sufficient number of rotations SUMN and work, and the coffee mill 3 After determining that the production amount of the raw material powder has reached the predetermined amount MCMD and executing steps 12 and 13 as described above, the present processing is terminated.

  On the other hand, if the determination result in step 7 is YES and SUMN ≧ SUMN1 is satisfied, it is determined that over-rotation of the mill motor 3b should be prevented, and after executing steps 12 and 13 as described above This process is terminated.

  Next, an example of a control result when the above-described control process of the coffee mill 3 is executed will be described with reference to FIGS. First, in the control result example shown in FIG. 4, the relay 9 is maintained in the ON state after the sales operation execution condition is satisfied (time t0), and the operation of the coffee mill 3 is continued. As a result, the accumulated rotational speed SUMN and the accumulated current value SUMI rise with time. At the time when SUMN ≧ SUMN2 is established (time t1), since SUMI <SUMI2, the work of the mill motor 3b is insufficient, and the accumulated rotational speed SUMN does not contribute to the production of the raw material powder. It is determined that the amount of raw material powder produced by the coffee mill 3 has not yet reached the predetermined amount MCMD. Thereby, the relay 9 is maintained in the ON state, and the operation of the coffee mill 3 is continued.

  Thereafter, when SUMI <SUMN1 is maintained and SUMI ≧ SUMI2 is established (time t2), it is determined that the production amount of the raw material powder has reached the predetermined amount MCMD, so that the relay 9 is turned OFF and the coffee mill 3 Is stopped. As a result, a raw material powder for a predetermined amount MCMD is appropriately produced.

  Further, in the control result example shown in FIG. 5, the relay 9 is maintained in the ON state after the sale operation execution condition is satisfied (time t <b> 10), and the operation of the coffee mill 3 is continued. As a result, the accumulated rotational speed SUMN and the accumulated current value SUMI rise with time. Then, at the time when SUMI ≧ SUMI1 is satisfied (time t11) with SUMN <SUMN2, the relay 9 is turned off by determining that the amount of raw material powder produced has reached the predetermined amount MCMD, and the coffee mill 3 Is stopped. As a result, a raw material powder for a predetermined amount MCMD is appropriately produced.

  As described above, according to the coffee raw material powder producing apparatus 1 of the present embodiment, the accumulated rotational speed SUMN and the accumulated current value SUMI are calculated after the coffee mill 3 is started, and SUMN2 ≦ SUMN <SUMN1 and SUMI. When ≧ SUMI2 is established, or when SUMN <SUMN2 and SUMI ≧ SUMI1 are established, the coffee mill 3 is stopped. In this case, as described above, the cumulative rotation number SUMN represents the amount of the raw material powder produced by the coffee mill 3, but may include the rotation number in the idling state that does not contribute to the production of the raw material powder. For this reason, when the amount of raw material powder produced by the coffee mill 3 is measured based only on the cumulative rotation number SUMN, the measurement accuracy may not necessarily be high. On the other hand, since the accumulated current value SUMI represents actual work in the mill motor 3b of the coffee mill 3, the operation / stop of the coffee mill 3 is controlled according to the accumulated rotational speed SUMN and the accumulated current value SUMI. Thus, the influence of the rotational speed that does not contribute to the production of the raw material powder can be eliminated, and the raw material powder for a predetermined amount MCMD can be produced while accurately measuring the raw material powder actually produced by the coffee mill 3. That is, it is possible to produce the raw material powder for a predetermined amount MCMD with high accuracy without using an expensive variable capacity type weighing instrument as in the prior art, thereby reducing the manufacturing cost.

  Next, a coffee raw material powder producing apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. As shown in FIG. 6, the manufacturing apparatus 1 </ b> A of the second embodiment is configured in the same manner except for the measuring device 20 as compared with the manufacturing apparatus 1 of the first embodiment described above. The same reference numerals are assigned to the same components, and the description thereof is omitted, and the measuring device 20 will be mainly described.

  The meter 20 is a quantitative type capable of metering a certain amount of MREF raw material powder produced by the coffee mill 3, and is attached to the lower side of the coffee mill 3. The fixed amount MREF that can be measured by the measuring device 20 is slightly less than the minimum of the predetermined amount of raw material powder required for beverage extraction among a plurality of types of coffee beverages sold by the cup type vending machine. Is set. As shown in FIG. 7, the measuring instrument 20 includes a measuring instrument main body 21, a support portion 22, a shutter 23, an electromagnetic actuator 24, a coil spring 25, and the like.

  The measuring device main body 21 has a rectangular cross section and is opened vertically, and is fitted to the raw material powder discharge port 3c of the coffee mill 3 through the upper opening, and is fixed to the coffee mill 3 in this state. . The support portion 22 includes two arms 22 a and 22 a that integrally extend obliquely downward from the measuring instrument main body 21. The shutter 23 has rotating shafts 23a and 23a (only one is shown) projecting from both ends thereof, and is attached to the support portion 22 in a state where each rotating shaft 23a is fitted in a hole of each arm 22a. ing. Thereby, the shutter 23 closes the lower opening of the measuring instrument body 21 (the position shown in FIG. 7A) and the open position that opens the lower opening (the position shown in FIG. 7B). It is configured to be freely rotatable between.

  One end of the coil spring 25 is attached to the tip of the arm 22a, and the other end is attached to the upper end of the shutter 23. Due to the biasing force of the coil spring 25, the shutter 23 is normally closed. The upper end portion of the electromagnetic actuator 24 is in contact with the distal end portion of the plunger 24b. In addition, when the amount of raw material powder produced by the coffee mill 3 reaches the above-described constant amount MREF, the shutter 23 resists the biasing force of the coil spring 25 and measures the measuring position (not shown) from the closed position to the open position. ) Until it turns slightly.

  On the other hand, the electromagnetic actuator 24 protrudes and retracts between the actuator main body 24a fixed to the support portion 22 and the actuator main body 24a between the retracted position shown in FIG. 7A and the drive position shown in FIG. 7B. A flexible plunger 24b is provided. The actuator body 24a incorporates a solenoid (not shown), and the plunger 24b is driven by the electromagnetic force of the solenoid.

  As shown in FIG. 8, the electromagnetic actuator 24 is electrically connected to the controller 10 and is turned ON / OFF by the controller 10. When the electromagnetic actuator 24 is OFF, the solenoid is held in a non-excited state, whereby the plunger 24a is held at the retracted position by the biasing force of the coil spring 25. On the other hand, when the electromagnetic actuator 24 is turned on, the solenoid is excited, whereby the plunger 24a projects to the driving position while resisting the biasing force of the coil spring 25, thereby driving the shutter 23 to the open position.

  Further, a shutter switch 26 is attached to the outer surface of the side wall of the measuring instrument main body 21, and the shutter switch 26 is electrically connected to the controller 10 as shown in FIG. The shutter switch 26 is held in the OFF state when the shutter 23 is in the closed position, and outputs a signal representing the same to the controller 10. Further, the shutter switch 26 changes from the OFF state to the ON state when the shutter 23 is rotated from the closed position to the measurement position described above, and outputs a signal representing the change to the controller 10.

  Next, the control process of the coffee mill 3 and the measuring device 20 by the controller 10 will be described with reference to FIG. As will be described below, this process is to produce the raw material powder for a predetermined amount MCMD corresponding to the beverage sold this time by controlling the coffee mill 3 and the measuring device 20, and is executed at a predetermined control cycle. Is done.

  In this control process, first, in step 20, it is determined whether or not the sales flag F_SALE described above is “1”. When this determination result is NO, this process is terminated as it is. On the other hand, when the determination result is YES, it is determined that the coffee beverage sales operation should be executed, and the process proceeds to step 21 to determine whether or not the threshold flag F_REF is “1”. When the determination result is NO, it is determined that the threshold value should be set, and the routine proceeds to step 22 where the third and fourth rotational speed threshold values SUMN3 and SUMN4 and the third and fourth current threshold values are determined. The values SUMI3 and SUMI4 are set.

  Specifically, all of these four thresholds SUMN3, SUMN4, SUMI3, and SUMI4 are constant amounts measured by the meter 20 from a predetermined amount MCMD of the raw material powder necessary for extracting the current beverage for sale. It is set by searching four maps (not shown) according to the value obtained by subtracting MREF (MCMD-MREF). The third and fourth rotation speed thresholds SUMN3 and SUMN4 are set so that SUMN4 = 0.8 × SUMN3 is established, and the third and fourth current thresholds SUMI3 and SUMI4 are set to SUMI4 = 0. 85 × SUMI3 is set to hold.

  After the four threshold values are set in step 22 as described above, in step 23, a threshold flag F_REF is set to “1” to represent it. As a result, the determination result in step 21 is YES in the next loop. In this case, steps 22 and 23 are skipped and the process proceeds to step 24.

  In step 24 following step 21 or 23, it is determined whether or not the shutter switch 26 is in an ON state. If the result of this determination is NO and the shutter switch 26 is in the OFF state, it is determined that the amount of raw material powder produced by the coffee mill 3 has not reached the above-mentioned constant amount MREF, and the routine proceeds to step 36 where the electromagnetic actuator 24 is turned on. Turn off. Thereby, the shutter 23 is held in the above-described closed position by the urging force of the coil spring 25, whereby the lower opening of the measuring instrument body 21 is held in the closed state.

  Next, the process proceeds to step 31 where the relay 9 is turned on. Thereby, the operation of the coffee mill 3 is continued. Thereafter, this process is terminated.

  On the other hand, if the determination result in step 24 is YES and the shutter switch 26 is in the ON state, it is determined that the amount of raw material powder produced by the coffee mill 3 has reached a certain amount MREF, and the process proceeds to step 25 where current value integration is performed. The integrated current value SUMI represented by the input signal from the circuit 8 is read. Thereafter, in step 26, based on the input signal from the rotary encoder 7, the integrated rotational speed SUMN is calculated.

  Next, the routine proceeds to step 27, where it is determined whether or not the integrated rotational speed SUMN calculated at step 26 is equal to or greater than the third rotational speed threshold value SUMN3 set at step 22. When the determination result is NO, the process proceeds to step 28, where it is determined whether or not the integrated rotation speed SUMN is equal to or greater than the fourth rotation speed threshold value SUMN4 set in step 22.

  When the determination result is NO, the process proceeds to step 29, where it is determined whether or not the integrated current value SUMI read in step 25 is equal to or greater than the third current threshold value SUMI3 set in step 22. When this determination result is NO and SUMN <SUMN4 and SUMI <SUMI3 are satisfied, the accumulated rotational speed of the mill motor 3b does not reach a sufficient value and the work of the mill motor 3b is insufficient. It is determined that the amount of raw material powder produced by the mill 3 has not yet reached the predetermined amount MCMD.

  Next, the process proceeds to step 30 and the electromagnetic actuator 24 is turned on. As a result, the shutter 23 is driven to the open position, and the lower opening of the measuring instrument main body 21 is held in the open state. Thereby, the raw material powder produced by the coffee mill 3 is supplied to the coffee beverage extractor 4. Next, in step 31, the relay 9 is turned on. Thereby, the operation of the coffee mill 3 is continued. Thereafter, this process is terminated.

  On the other hand, when the determination result in step 29 is YES and SUMN <SUMN4 and SUMI ≧ SUMI3 are established, the work of the mill motor 3b has reached a sufficient value. It is determined that the fixed amount MCMD has been reached, and in Steps 33 and 34, the electromagnetic actuator 24 is turned off and the relay 9 is turned off. Thereby, the shutter 23 is driven to the closed position, the measuring device 20 returns to a state in which the raw material powder can be measured, and the operation of the coffee mill 3 is stopped.

  Next, in step 35, both the sales flag F_SALE and the threshold flag F_REF described above are set to “0”, and the accumulated rotational speed SUMN is reset to the value 0. Thereafter, this process is terminated.

  On the other hand, when the determination result of step 28 is YES, the process proceeds to step 32 to determine whether or not the integrated current value SUMI is greater than or equal to the fourth current threshold value SUMI4. When this determination result is NO and SUMN4 ≦ SUMN <SUMN3 and SUMI <SUMI4 are satisfied, the accumulated rotational speed SUMN of the mill motor 3b has reached a sufficient value, but the work of the mill motor 3b is insufficient. Thus, it is determined that the production amount of the raw material powder by the coffee mill 3 has not yet reached the predetermined amount MCMD, and after executing Steps 30 and 31 as described above, the present process is terminated.

  On the other hand, when the determination result in step 32 is YES and SUMN4 ≦ SUMN <SUMN3 and SUMI ≧ SUMI4 are satisfied, the work of the mill motor 3b and the accumulated rotational speed SUMN both have reached sufficient values. After determining that the amount of the raw material powder produced by No. 3 has reached the predetermined amount MCMD and performing steps 33 to 35 as described above, the present processing is terminated.

  On the other hand, if the determination result in step 27 is YES and SUMI ≧ SUMI3 is established, it is determined that over-rotation of the mill motor 3b should be prevented, and after executing steps 33 to 35 as described above This process is terminated.

  As described above, according to the coffee raw material powder preparation apparatus 1A of the present embodiment, the raw material powder for a certain amount MREF is prepared by the coffee mill 3 and the shutter switch 26 is turned on. When the accumulated current value SUMI is calculated and SUMN4 ≦ SUMN <SUMN3 and SUMI ≧ SUMI4 are satisfied, or when SUMN <SUMN4 and SUMI ≧ SUMI3 are satisfied, the coffee mill 3 is stopped. In this case, for the reasons described above, when the amount of raw material powder produced by the coffee mill 3 is measured based only on the cumulative rotation number SUMN, the measurement accuracy may not necessarily be high, but the cumulative current value SUMI is Since it represents the actual work in the mill motor 3b of the mill 3, it contributes to the production of raw material powder by controlling the operation / stop of the coffee mill 3 in accordance with the accumulated rotational speed SUMN and the accumulated current value SUMI. The raw material powder for a predetermined amount MCMD as a whole can be produced while accurately measuring the raw material powder actually produced by the coffee mill 3 while eliminating the influence of the rotational speed that is not. In other words, by using a quantitative meter 20 that is cheaper than a conventional variable capacity meter, it is possible to produce a raw material powder for a predetermined amount MCMD while accurately measuring it. Manufacturing cost can be reduced.

  Each embodiment is an example in which the integrated value of the deviation (I-IREF) between the current value I and the no-load current value IREF is used as the integrated current value SUMI. Not limited to this, a value obtained by integrating the current value I as it is may be used. In that case, as the first to fourth current thresholds SUM1 to SUM4 described above, values that take into account the integral value of the no-load current value IREF may be used.

  Each embodiment is an example in which the current value integrating circuit 8 is used as the current value detecting means, but the current value detecting means of the present invention is not limited to this, and can detect the value of the current flowing through the mill motor 3b. If it is. For example, a magnetic field sensor type current sensor may be used as the current value detection means.

  Furthermore, each embodiment is an example in which the current value integration circuit 8 is used as the integrated current value calculating means, but the integrated current value calculating means of the present invention is not limited to this, and the detected value of the current flowing through the mill motor 3b is integrated. Anything is possible. For example, a microcomputer or the like may be used as the integrated current value calculation means.

  On the other hand, each embodiment is an example in which the rotary encoder 7 is used as the rotational speed detecting means for detecting the rotational speed of the mill motor 3b. However, the rotational speed detecting means of the present invention is not limited to this, and the rotational speed of the mill motor 3b is not limited thereto. What is necessary is just to be able to detect the number N. For example, an MRE (magnetoresistive element) rotation sensor or a resolver may be used as the rotation speed detection means.

  In addition, each embodiment is an example using the controller 10 configured by a microcomputer as an integrated rotational speed calculating means, but the integrated rotational speed calculating means is not limited to this, and can integrate the rotational speed of the mill motor. I just need it. For example, an electric circuit such as an integration circuit may be used as the integrated rotation speed calculation means.

  Furthermore, although each embodiment is an example using the DC motor type mill motor 3b as an electric motor, it may replace with this and may use an AC motor as an electric motor.

  Further, the second embodiment is an example in which the operation / stop of the coffee mill 3 is controlled in accordance with the ON / OFF state of the shutter switch 26, the integrated rotational speed SUMN, and the integrated current value SUMI in order to increase the measurement accuracy. However, the operation / stop of the coffee mill 3 may be controlled in accordance with the ON / OFF state of the shutter switch 26 and the accumulated rotational speed SUMN. In that case, in the control process of FIG. 9 described above, only the third and fourth rotation speed thresholds SUMN3 and SUMN4 are calculated in step 22, and when the determination result in step 28 is NO, the process proceeds to step 30. At the same time, if the determination result in step 28 is YES, the process may proceed to step 33. In this case, a certain level of weighing accuracy can be ensured.

  Furthermore, in the second embodiment, the fixed amount MREF that can be measured by the measuring device 20 is smaller than the minimum value of the raw material powder amount required for beverage extraction among the plurality of types of coffee beverages sold by the cup type vending machine. In this example, the fixed amount MREF may be set to the same value as the minimum value. In this case, in FIG. 9, when MCMD = MREF, the electromagnetic actuator 24 is turned on simultaneously with the execution of steps 34 and 35, and the electromagnetic actuator 24 is turned off when a predetermined time has elapsed. Good.

It is a perspective view which shows the external appearance of the preparation apparatus of the coffee raw material powder | flour which concerns on 1st Embodiment of this invention. It is a figure which shows the electrical schematic structure of the preparation apparatus of the coffee raw material powder | flour of 1st Embodiment. It is a flowchart which shows the control processing of a coffee mill. It is a timing chart which shows an example of the control result of a coffee mill. It is a timing chart which shows another example of the control result of a coffee mill. It is a perspective view which shows the external appearance of the preparation apparatus of the coffee raw material powder | flour which concerns on 2nd Embodiment of this invention. It is a perspective view which shows (a) the state which closed the shutter, and (b) the state which opened the shutter, respectively. It is a figure which shows the electrical schematic structure of the preparation apparatus of the coffee raw material powder | flour of 2nd Embodiment. It is a flowchart which shows the control process of a coffee mill and a measuring device.

Explanation of symbols

1,1A Coffee raw material powder production equipment 3 Coffee mill 3b Mill motor (electric motor)
7 Rotary encoder (speed detection means)
8 Current value integration circuit (current value detection means, integrated current value calculation means)
10 Controller (integrated rotation speed calculation means, control means)
20 Meter MCMD Predetermined amount MREF Fixed amount N Number of revolutions SUMN Accumulated number of revolutions I Current value SUMI Integrated current value IREF Predetermined no-load current value

Claims (4)

  1. In order to extract a coffee beverage, a coffee raw material powder producing apparatus for pulverizing coffee beans to produce a predetermined amount of raw material powder,
    An electric coffee mill that has an electric motor and pulverizes coffee beans by rotation of the electric motor to produce raw powder;
    A rotational speed detection means for detecting the rotational speed of the electric motor;
    An integrated rotational speed calculating means for calculating the integrated rotational speed by integrating the detected rotational speed from the start of the coffee mill;
    Current value detection means for detecting the value of the current flowing through the motor;
    Based on the detected current value, an integrated current value calculating means for calculating an integrated current value from the start of the coffee mill;
    Control means for starting the coffee mill when a predetermined condition is satisfied, and stopping the coffee mill according to the calculated integrated rotation speed and the calculated integrated current value;
    An apparatus for producing coffee raw material powder, comprising:
  2. In order to extract a coffee beverage, a coffee raw material powder producing apparatus for pulverizing coffee beans to produce a predetermined amount of raw material powder,
    An electric coffee mill that has an electric motor and pulverizes coffee beans by rotation of the electric motor to produce raw powder;
    A quantitative meter that measures a certain amount of raw material powder produced by the coffee mill and less than the predetermined amount;
    A rotational speed detection means for detecting the rotational speed of the electric motor;
    An integrated rotational speed calculating means for calculating the integrated rotational speed by integrating the detected rotational speed from the start of the coffee mill;
    Control means for starting the coffee mill when a predetermined condition is satisfied, and stopping the coffee mill according to the calculated integrated rotational speed and a certain amount of the measuring device;
    An apparatus for producing coffee raw material powder, comprising:
  3. Current value detection means for detecting the value of the current flowing through the motor;
    Based on the detected current value, further comprising integrated current value calculating means for calculating the integrated current value from the time of starting the coffee mill,
    The said control means stops the said coffee mill further according to the calculated said integrated electric current value, The preparation apparatus of the coffee raw material powder | flour of Claim 2 characterized by the above-mentioned.
  4.   The integrated current value calculating means calculates the integrated current value by integrating a deviation between the detected current value and a predetermined no-load current value when the electric motor is in a no-load state. The apparatus for producing coffee raw material powder according to claim 1 or 3.
JP2005343628A 2005-11-29 2005-11-29 Device for producing powder of coffee raw material Withdrawn JP2007143935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005343628A JP2007143935A (en) 2005-11-29 2005-11-29 Device for producing powder of coffee raw material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005343628A JP2007143935A (en) 2005-11-29 2005-11-29 Device for producing powder of coffee raw material

Publications (1)

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JP2007143935A true JP2007143935A (en) 2007-06-14

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JP2005343628A Withdrawn JP2007143935A (en) 2005-11-29 2005-11-29 Device for producing powder of coffee raw material

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009119244A (en) * 2007-08-29 2009-06-04 Seb Sa Method for counting number of revolutions of burr of coffee mill and appliance comprising the mill
JP2009131600A (en) * 2007-08-29 2009-06-18 Seb Sa Method for measuring quantity of coffee dispensed by coffee mill and appliance comprising such mill
JP2013059230A (en) * 2011-09-09 2013-03-28 Fuji Electric Co Ltd Motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009119244A (en) * 2007-08-29 2009-06-04 Seb Sa Method for counting number of revolutions of burr of coffee mill and appliance comprising the mill
JP2009131600A (en) * 2007-08-29 2009-06-18 Seb Sa Method for measuring quantity of coffee dispensed by coffee mill and appliance comprising such mill
JP2013059230A (en) * 2011-09-09 2013-03-28 Fuji Electric Co Ltd Motor

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