JP3972462B2 - Operation method of blower in fresh leaf management device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the operation of a fresh leaf management device, and more particularly to a method of operating a blower that can prevent noise, heat generation, and the like due to the start of the blower.
[0002]
BACKGROUND OF THE INVENTION
Freshly picked fresh tea leaves that are brought into the tea factory are stored in the fresh leaf management room until they are put into the steaming machine, which is the first processing equipment. Since the fresh tea leaves still breathe after plucking, heat is generated by this breathing, and as an example, the internal temperature when deposited at a height of about 110 cm may be 10-15 ° C. higher than the outside air. Yes, raw tea leaves lose water and cause leaf burning (steamed state). In order to prevent such leaf burning and maintain the freshness of the fresh tea leaves, the fresh leaf management device adopts a configuration in which air is blown from below the air permeable plate toward the fresh tea leaves accumulated on the air permeable plate. .
[0003]
By the way, the fresh leaf management device includes a pit type, a gauge type, an automatic container type, and the like. In order to lower the temperature, continuous blowing is performed for about one hour after the stacking of fresh tea leaves. Thereafter, air is blown intermittently using a timer. For example, in the case of the most brown, air is blown for 20 minutes, and the operation of stopping for 40 minutes is repeated.
[0004]
However, due to the configuration of the fresh leaf management apparatus as described above, the following problems have occurred. That is, the air blow to the fresh tea leaves is performed by a blower equipped with a motor. For example, in the case of an automatic container type, this blower is provided for each of a plurality of blocks that divide the air permeable plate. As an example, there are four for 300K lines, eight for 600K lines, twelve for 1000K lines, sixteen for 1300K lines, and a tea factory with multiple lines. Then, there will be more air blowers.
[0005]
And when starting the blower, the inrush current of several times to dozens of times the rated current that flows transiently flows through the motor provided in this thing, and since multiple blowers are started simultaneously, As a result of this, a voltage drop of the tea factory power system may cause malfunction of other devices (control panel, etc.), and power cables, switches, etc. may generate heat.
In addition, the noise level generated from the blower is higher at startup than during normal operation, and since multiple blowers are activated at the same time and operate simultaneously, the noise level is considerable, causing noise pollution to the neighborhood day and night. ing.
These problems have a greater influence than in continuous operation because the blower is turned on and off at regular intervals, particularly when the blower is intermittently operated.
[0006]
[Technical problem to be solved]
The present invention has been made in view of such a background, and is used in a fresh leaf management device that can reduce problems such as a voltage drop, noise, and heat generation of a power supply system that occurs when the blower is started or operated. The development of the operation method of the device is a technical issue.
[0007]
[Means for Solving the Problems]
That is, the operation method of the air blower in the fresh leaf management apparatus according to claim 1 is configured such that the air blow drums of a plurality of air blowers are positioned below the air permeation plate, and the air blow plate provided on the air permeation plate is deposited on the air permeation plate. through wind fresh tea leaves that, in the operation of leaf management apparatus to suppress the temperature rise of the raw tea leaves by dissipating the respiratory heat accumulated between fresh tea leaves, the activation of the blower, in which Yuku performed sequentially provided a time lag Yes, this time lag is set such that only a preset number of blowers are in an operating state in one blowing operation .
According to the present invention, power transmission to the blower is not concentrated at once, and since the total current consumption of the blower in the operating state is not excessive, it is possible to suppress a voltage drop in the power supply system of the tea factory, Heat generation from power cables , switches, etc. can be suppressed.
Moreover, since the noise generated from the blower is not concentrated at one time, the noise level of the entire tea factory can be lowered.
[0008]
In addition to the above requirements , the operation method of the blower device in the fresh leaf management device according to claim 2 requires that at least the current consumption of the motor provided in the blower becomes a steady value when sequentially starting the plurality of blower devices. It is characterized by providing the required time as a time lag and starting up .
According to the present invention, since the inrush current at the time of starting the blower is not concentrated at one time, the total current consumption is not excessive, and the voltage drop of the power supply system can be suppressed. Moreover, heat generation from the power cable, switch, etc. can be suppressed. Furthermore, the noise level can be reduced.
The above problems can be solved by using the configuration of the invention described in each of the claims as a means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, after describing the configuration of the fresh leaf management device to which the present invention is applied, the “operation method of the blower in the fresh leaf management device” of the present invention will be described together with the operation of the fresh leaf management device.
Reference numeral 1 in the figure denotes a fresh tea leaf container device which is an example of a fresh leaf management device, which is a device for temporarily storing fresh tea leaves A while maintaining freshness and supplying them to the steaming process which is the next process. In addition, storage and supply of this fresh tea leaf A are collectively referred to as fresh leaf management.
[0010]
As shown in FIG. 1, the raw tea leaf container device 1 has a transport body 2, a side plate 3, a drive device 4, a blower device 5, a scraping device 6, and a take-out conveyor 7 for a machine frame F assembled in a rectangular shape. In addition, in a state where it is installed in a tea factory, a charging device 8 is provided above the fresh tea leaf container device 1.
Hereinafter, these members will be schematically described.
[0011]
The transport body 2 suspends a chain 22 from a pair of left and right sprockets 21 provided at the front lower portion and the rear lower portion in the longitudinal direction of the machine frame F. The slat conveyor is configured such that the slat 23 travels by suspending a slat 23 which is an air permeable plate having a perforated hole and at least one of the sprockets 21 is driven by a driving device 4 described later.
[0012]
Further, the side plate 3 is a plate-like member made of metal or the like raised on both sides of the transport body 2, and forms an accommodating portion 1 </ b> A having an open upper surface together with the slats 23 of the transport body 2.
[0013]
The driving device 4 is provided at either the front lower part or the rear lower part of the transport body 2 and includes an appropriate electric motor and speed reducer and power to the sprocket 21 of the transport body 2. To communicate.
[0014]
Further, a plurality of blower devices 5 are provided for the transport body 2, and a blow drum 5A is provided immediately below the slat 23 which is a transport action surface. Although the number of the blow cylinders 5A is six in the present embodiment, of course, this number may be appropriately increased or decreased as necessary, or a partition between the adjacent blow cylinders 5A may be removed if necessary, or Of course, it is possible to make it possible to use it so that the adjacent blower cylinders 5A can be integrated with each other.
[0015]
A duct 5C is connected to the blower drum 5A, and a blower 5B driven by a motor M is provided above the duct 5C.
Of course, one blower 5B takes charge of the two sections of the blower cylinder 5A and blows all at once, as well as appropriate blower means such as selecting and blowing any one blower cylinder 5A by appropriately attaching a damper or the like. Can be taken.
The air blower 5 is not limited to only air blowing, but may be provided with a mechanism such as adding a humidifying function to feed the fresh tea leaves A appropriately to send wet air.
In describing the operation of the blower 5, the blowers 51, 52, 53, 54, 55, and 56 are sequentially referred to from the discharge end side of the transport body 2 when they are referred to separately.
[0016]
Further, the scraping device 6 is provided above the discharge end of the transport body 2 and includes an appropriate scraping mechanism such as a rotary rod.
[0017]
Moreover, the take-out conveyor 7 uses a vibration conveyor as an example, in order to supply the raw tea leaf A to the steaming process, which is the next process, with the conveyance start end side facing the discharge end of the conveyance body 2 and the conveyance end side. It is installed facing the vertical conveyor.
[0018]
As an example, as shown in FIG. 2, the input device 8 is provided so that a single input device 8 inputs the fresh tea leaf A to the fresh tea leaf container device 1 provided with two. And it is comprised so that selection operation | movement position can be selected and moved to the longitudinal direction and the width direction of the fresh tea leaf container apparatus 1 suitably.
[0019]
The raw tea leaf container apparatus 1 which is an example of the raw leaf management apparatus to which the present invention is applied is configured as described above. Hereinafter, the “raw leaves” of the present invention are combined with the operation mode of the raw tea leaf container apparatus 1. The operation | movement method of the air blower in a management apparatus is demonstrated. The air blowing operation described in claim 1 means a continuous air blowing operation and an intermittent air blowing operation which will be described later, and these will also be described below.
[0020]
[Continuous ventilation operation]
In managing the fresh tea leaves A, the blower device 5 is first activated. The blower device 5 is activated in the order of the blower devices 51, 52, 53, 54, 55, 56 by providing a time lag. I will go.
This time lag is at least the time required for the current consumption of the motor M included in the blower 51 to reach a steady value, and the inrush current is reduced from the maximum value Ir as shown in FIG. After reaching Is, the air blower 52 is started after the lapse of Δt (several tens of milliseconds), and thereafter the air blowers 53, 54, 55, and 56 are similarly started.
Of course, the blower 5 is activated only for the portion that is located in the portion where the fresh tea leaves A are introduced.
[0021]
Next, the raw tea leaves A are thrown into the accommodating portion 1 </ b> A by the feeding device 8, and the raw tea leaves A are deposited on the slats 23 in the transport body 2. At this time, the individual fresh tea leaves A are deposited on the slats 23 while being exposed to the wind passing through the small holes 23a from the blower cylinder 5A, and are usually stacked to a height of about 110 cm.
In order to lower the tea temperature as soon as possible after the introduction of such raw tea leaves A, continuous air blowing is performed for about 1 hour, and the heat of breathing accumulated between the raw tea leaves A is dissipated to leave the raw tea leaves A. Suppresses the temperature rise.
[0022]
[Intermittent fan operation]
After that, when storing the fresh tea leaves A in the fresh tea leaf container device 1 without immediately processing, the blower 5 is intermittently activated using a timer to blow air. In this case, the operation of blowing air for 20 minutes and stopping for 40 minutes is repeated. In the case of 2nd and 3rd teas, the operation of blowing air for 30 minutes and stopping for 30 minutes is repeated.
In addition, although the time which can store the said raw tea leaf A changes with the property and time of the raw tea leaf A, it is usually about 20 hours at the longest. That is, during this time, the blower 5 is subjected to intermittent blowing operation in which the blowing operation and the stop are repeated dozens of times.
[0023]
And the start of the air blower 5 at the time of the above-mentioned intermittent air blowing operation is performed in the order of the air blowers 51, 52, 53, 54, 55, 56 with a time lag.
About this time lag, it sets so that only the preset number will be in an operation state in one intermittent fan operation. Specifically, in the embodiment shown in the time chart of FIG. 5, the most brown is handled, and the time lag is set to 20 minutes so that only the two air blowers 5 are in operation simultaneously. That is, first, the air blower 51 is operated for 20 minutes, and after the air blower 51 is stopped, the air blower 52 is operated for 20 minutes, and the air blower 53 and the subsequent devices are similarly started with a time lag of 20 minutes. .
[0024]
The blower 51 overlaps with the start of the first blow operation of the blower 54 in order to start the second blow operation when 40 minutes have elapsed after completing the first blow operation (20 minutes). Two units with the blower 54 operate simultaneously.
In the above description, during the first air blowing operation of the air blower 51, the air blower 54 does not enter the operating state, and therefore the state where the fresh tea leaves A located in the section of the air blower 54 are not blown continues for 60 minutes. It is not preferable for the management of tea leaves A. Therefore, as shown by the broken line in FIG. 5, even during the first blowing operation of the blower 51, the blower 51 and the blower 54 are simultaneously operated by performing the first sending operation of the blower 54. To do. Similarly, the air blowers 55 and 56 are simultaneously operated at the first operation of the air blower 52 and the air blower 53, respectively.
[0025]
Even in such intermittent air blowing operation, the air blower 51 and the air blower 54 (similarly, the air blower 52 and the air blower 55, the air blower 53 and the air blower 56) have the same time lag as in the previous continuous air blow operation. The time lag is at least the time required for the current consumption of the motor M included in the blower 51 to reach a steady value.
[0026]
[Other embodiments]
The present invention is based on the above-described embodiment, but the following embodiment can also be adopted based on the technical idea of the present invention.
First, in the previous embodiment, the management of the first tea is taken as an example, air blowing is performed for 20 minutes, intermittent air blowing operation is stopped for 40 minutes, and only two blowers 5B are in an operating state in one air blowing operation. However, the number of blowers 5B that are simultaneously in operation can be selected as appropriate.
[0027]
In the previous embodiment, the blower 5 for preventing leaf burning has been described. However, the blower 5 is also applied to the fresh tea leaf container device 1 in which the blower 5 for humidification is provided together with the blower 5 for preventing leaf burn. As for the operation of the blown prevention and wet air blowing devices, only the number of blowers 5B set in advance in one air blowing operation are in an operating state.
[0028]
In the previous embodiment, the raw tea leaf container device 1 that is a conveyor-type fresh leaf management device has been described. However, the present invention can also be applied to a pit-type, gauge-type, or container-type fresh leaf management device.
[0029]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, various problems, such as the voltage drop of a power supply system, noise, and heat_generation | fever of a power supply cable which occur at the time of operation of the air blower in a tea factory etc., can be reduced or avoided.
[Brief description of the drawings]
FIG. 1 is a front view showing a fresh tea leaf container apparatus to which the present invention is applied.
FIG. 2 is a longitudinal side view of the same as above.
FIG. 3 is a plan view of the same.
FIG. 4 is a graph showing the operating state of the air blower device during continuous air blowing operation as a current value.
FIG. 5 is a time chart showing an operating state of the air blower during intermittent air blowing operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fresh tea leaf container apparatus 1A Accommodating part 2 Conveyance body 3 Side plate 4 Drive apparatus 5 Blower 5A Blower 5B Blower 5C Duct 6 Scraping apparatus 7 Unloading conveyor 8 Loading apparatus 21 Sprocket 22 Chain 23 Slat 23a Small hole 51 Blower 52 Blower 53 Blower 54 Blower 55 Blower A Fresh tea leaf F Machine frame M Motor

Claims (2)

The blower drums of a plurality of blowers are positioned at the lower part of the air permeable plate, and the blower provided in the blower device passes air through the fresh tea leaves accumulated on the air permeable plate, thereby generating the respiratory heat accumulated between the fresh tea leaves. desorbs in the operation of leaf management apparatus to suppress the temperature rise of the raw tea leaves, the activation of the blower, which Yuku performed sequentially provided a time lag, the time lag, the number previously set in a single blowing operation blower The operation method of the air blower in the fresh-leaf management apparatus characterized by setting so that only may become an operation state . The sequential when activates multiple blower, leaf management apparatus according to claim 1, wherein the start by providing the time required for the current consumption of the motor equipped with at least blower becomes a steady value as the time lag Method for operating the blower in FIG.

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