Ventilation device for grain tank

Abstract

To provide a ventilation device for a grain tank that can simplify piping without installing an exhaust pipe on centralized piping and allows efficient operation of an exhaust system.SOLUTION: A ventilation device for a grain tank includes: a filter unit 17 installed in an upper part of a grain tank 11 for storing grains that are loaded from a loading port 40 to separate air from dust; and a blower unit 18 for discharging the air that is separated by the filter unit 17 to the outside. The filter unit 17 includes: a filter 19 for separating internal air from powder such as dust; a housing 20 for storing the filter 19; and a back washing mechanism 21 for back washing the filter 19. The blower unit 18 includes: a blower 26 including a suction port and an exhaust port in the housing 23; an air volume regulating valve 27 connected to the exhaust port of the blower 26; and a controller 32 for controlling the back washing mechanism 21, the blower 26 and the air volume regulating valve 27.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a ventilation device for grain tanks such as brown rice tanks and polished rice tanks, which are installed in large numbers in rice mills and the like. [Background technology]

[0002] Traditionally, rice milling plants are equipped with multiple brown rice tanks to store brown rice after it is received, and multiple polished rice tanks to store polished rice after it is polished. In order to ventilate (aerate) these grain tanks and collect dust, centralized piping is used and a single air conditioner and single dust collector are installed to consolidate the equipment.

[0003] Patent Document 1 discloses that multiple brown rice tanks are arranged with centralized piping and ventilation is performed by a single exhaust system. Each brown rice tank is equipped with a grain inlet, an air intake for exhaust, and an exhaust port. When a signal is issued from the control unit, exhaust is performed for a specific brown rice tank according to a sequence. The air exhausted from the exhaust port sucks in floating bran and dust and heads from the exhaust pipe to the exhaust device. A bag filter is installed inside the exhaust device to remove dust from the exhaust flow.

[0004] In the embodiment, a valve is installed at the exhaust port and is opened and closed in sequence. Therefore, ventilation is always performed only for one brown rice tank, so ventilation is not performed for tanks that have already finished processing or empty tanks. Also, only an exhaust device that is suitable for the capacity of one tank is required (paragraph 0017). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-65039 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the above-mentioned conventional techniques have the following problems. (A) The exhaust pipe is centralized, making the piping complicated. (B) There is a risk of dust accumulating in the exhaust pipe due to this centralized piping, which requires regular cleaning. (C) There is a risk that the exhaust system will be operated inefficiently.

[0007] In view of the above problems, the present invention has as its technical object to provide a ventilation system for a grain tank which does not require the installation of a centralized exhaust pipe, can simplify the piping, and enables the exhaust system to be operated efficiently. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a grain tank ventilation device that is provided on the top of the grain tank, which stores grain fed through a grain inlet, and includes a filter unit that separates dust and air, and a blower unit that exhausts the air separated by the filter unit to the outside, wherein the filter unit is composed of a filter that separates powder such as dust from the internal air, a housing that contains the filter, and a backwash mechanism that backwashes the filter, and the blower unit is provided with the following technical measures within the housing: a blower having an intake port and an exhaust port, an airflow regulating valve connected to the exhaust port of the blower, and a control unit that controls the backwash mechanism of the filter unit, and the blower and airflow regulating valve of the blower unit.

[0009] The invention described in claim 2 is characterized in that a central control device is provided which sends and receives communication data between the control unit and the central control device, and sends to the control unit commands to operate and stop the blower, to operate and stop the backwash mechanism, and / or to adjust the opening degree of the air volume control valve, and that the control unit and the central control device are capable of communicating with each other via a predetermined network.

[0010] In the invention described in claim 3, when there are a plurality of the grain tanks, the ventilation devices are provided in pairs corresponding to each of the plurality of grain tanks, different identification information is set in the control unit of each of the ventilation devices, and the central control device compares the identification information of the grain tank and the ventilation device and issues a command to the control unit.

[0011] The invention described in claim 4 is characterized in that the filter unit of the ventilation device and the blower unit of the ventilation device are fixed to each other with a plurality of buckle fittings so that they can be removed without the use of tools. Effect of the Invention

[0012] According to the present invention, a ventilation device for a grain tank is provided on the upper part of the grain tank for storing grains fed from a grain feed port, the ventilation device comprising a filter unit for separating dust and air, and a blower unit for exhausting the air separated by the filter unit to the outside, the filter unit being composed of a filter for separating powder such as dust from the internal air, a housing for accommodating the filter, and a backwashing mechanism for backwashing the filter, the blower unit being provided in the housing with a blower having an intake port and an exhaust port, an airflow control valve connected to the exhaust port of the blower, and a control unit for controlling the backwashing mechanism of the filter unit, the blower of the blower unit, and the airflow control valve, since the ventilation device is provided directly on the upper part of the grain tank, the piping can be simplified without the need for a centralized exhaust pipe, and the exhaust device can be operated efficiently. Also, the internal temperature of the grain tank can be adjusted to prevent condensation from occurring in the grain tank.

[0013] Furthermore, as in claim 2, a central control device is provided that sends and receives communication data with the control unit and sends to the control unit commands to operate / stop the blower, operate / stop the backwash mechanism, and / or adjust the opening of the air volume control valve, and if the control unit and the central control unit are capable of communicating with each other via a specified network, commands can be sent from the central control unit to the control unit of the ventilation device remotely.

[0014] In addition, as in claim 3, when there are a plurality of grain tanks, the ventilation devices are provided in pairs corresponding to the plurality of grain tanks, and different identification information is set in the control units of the ventilation devices. The central control device compares the identification information of the grain tank and the ventilation device and sends a command to the control unit. In this way, the plurality of grain tanks and the plurality of ventilation devices are managed in pairs, and by comparing the identification information, it is possible to prevent erroneous operation or malfunction of other ventilation devices that are not the target, thereby improving the reliability of operation.

[0015] Furthermore, as described in claim 4, if the filter unit of the ventilation device and the blower unit of the ventilation device are fixed to each other with a plurality of buckle fittings so that they can be removed without the use of tools, the filter unit and blower unit can be easily disassembled and cleaned when performing maintenance or regular cleaning. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a flow diagram of a grain tank ventilation system according to an embodiment of the present invention installed in a rice milling plant. [Diagram 2] FIG. 2 is a schematic diagram of a ventilation device installed in a grain tank. [Diagram 3] FIG. 2 is a schematic diagram illustrating a control system for the ventilation device. [Figure 4] 4 is an operational flow diagram of a central control device that controls the entire ventilation device. FIG. [Diagram 5]4 is a timing chart showing the operation of the ventilation device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the embodiments is merely an example in nature.

[0018] FIG. 1 is a flow diagram of a ventilation device for a grain tank according to an embodiment of the present invention installed in a rice milling factory, and FIG. 2 is a schematic explanatory diagram of the ventilation device disposed in the grain tank.

[0019] As shown in Fig. 1, brown rice brought into the rice milling factory 1 is first received by a receiving hopper 2, which serves as a receiving facility. The received brown rice is then lifted by a lifting machine 3 and first processed by a rough sorter 4. In the rough sorter 4, coarse debris (e.g., stones, straw, paper strings, and lint) mixed in with the brown rice is removed by a flow-down screen. In addition, the rough sorter 4 is equipped with a receiving and dust collector 35, which serves as an airflow sorter, and the receiving and dust collector 35 removes light impurities such as dust and rice husk fragments.

[0020] Next, the brown rice is processed by a stone remover 5 to remove stones mixed in the brown rice. The stone remover 5, for example, supplies the brown rice onto a sorting net and separates the brown rice from the stones based on the buoyancy generated in the brown rice by applying vibration and wind. Next, the brown rice is lifted by a lifter 6 and weighed by a weigher 7.

[0021] The weighed brown rice is lifted by a lifting machine 8, then passes through a branch valve 9 and flow conveyors 10A, 10B and is stored in a single brown rice tank 11 for each lot according to the variety and place of origin of the brown rice in two series of brown rice tank (storage tank) groups 11A..., 11B... consisting of A and B. In the example of a rice milling factory shown in Figure 1, ten brown rice tanks 11 numbered No. 1 to No. 10 are arranged in the brown rice tank group 11A, and ten brown rice tanks 11 are also arranged in the brown rice tank group 11B. In addition, a ventilation device 12 is provided on the top plate of each brown rice tank 11 to aerate and collect dust from the brown rice tank 11.

[0022] The brown rice stored in the brown rice tank 11 is removed from the brown rice tank 11 by the operation of the on-off valve 13, and the desired amount is taken out by the weighing machine 14, passes through the flow conveyors 15A and 15B, and is then lifted by the lifting machine 16 or the like. The rice then reaches the rice polishing process (not shown), where it is polished by a rice polishing machine (milling machine). The white rice obtained by polishing is sorted by a sorting machine to remove foreign matter and the like. As the sorting machine, for example, a sieve-type sorting machine or an optical sorting machine can be used. The white rice that has been sorted is stored in the polished rice tank (product tank). This stored white rice is appropriately cut out, weighed and packaged by a weighing and packaging machine, and then transported out of the rice polishing factory 1.

[0023] As shown in Fig. 1, a ventilation device 12 is provided for each grain tank (e.g., brown rice tank 11 and polished rice tank (product tank)). As shown in Fig. 2, the ventilation device 12 is disposed on the upper part of the brown rice tank 11 equipped with a brown rice inlet 40, and has a filter unit 17 that separates powder such as dust from the air inside the brown rice tank 11, and a blower unit 18 that exhausts the air separated by this filter unit 17 to the outside of the brown rice tank 11.

[0024] The filter unit 17 is composed of a filter 19 that separates powder such as dust from the internal air, a housing 20 that houses the filter 19, and a backwashing mechanism 21 that backwashes the filter 19. The lower part of the housing 20 is connected to the brown rice tank 11, while the upper part of the housing is connected to the blower unit 18. The filter unit 17 and the blower unit 18 are removable, and when fixed using a plurality of buckle fittings (so-called snap locks) 22a, 22b, for example, they can be easily removed without using tools.

[0025] The blower unit 18 includes, within a housing 23, a blower 26 having an intake port 24 and an exhaust port 25, and an air flow rate adjusting valve 27 connected to the exhaust port 25 of the blower 26. In addition, a control unit 32 is provided in the housing 23 of the blower unit 18, the control unit 32 being equipped with a blower control unit 28 capable of switching the blower 26 on and off, an air flow control valve control unit 29 which appropriately adjusts the opening degree of the air flow control valve 27, a transmitting / receiving unit 30 which receives signals from a central control device described below and transmits signals, and a memory unit 31 which stores individual identification information (ID number).

[0026] The filter 19 of the filter unit 17 is a filter provided in the pulse jet type backwash mechanism 21. One end 19a of the filter 19 is open, and the other end 18b is a closed cylindrical filter. The outside of the filter 19 faces the inside of the brown rice tank 11, and the inside of the filter is disposed so that the air after filtration is on the side. It is preferable to adopt a pleated filter as the shape of the filter 19, and if the pleated filter is used, the surface area per volume can be increased to improve the filtering performance. In addition, for example, when the diameter of the brown rice tank is 3 m and the height of the cylindrical part of the brown rice tank is 5 to 6 m, it is possible to adopt a pleated filter with a height of 500 mm and a diameter of 200 mm as the filter dimensions. This is one example, and other suitable selections may be made according to the dimensions, shape, material, etc. of the brown rice tank 11 and the filter 19.

[0027] The backwash mechanism 21 is composed of a nozzle 21a opening at the open end 19a of the filter 19, a supply pipe 21b for supplying high-pressure air for generating a pulse jet from the nozzle 21a, an electromagnetic valve 21c for generating and ejecting the pulse jet from the nozzle 21a, a manifold (collecting pipe) 21d for supplying high-pressure air to each electromagnetic valve 21c when a plurality of electromagnetic valves 21c are provided, and a high-pressure air source (not shown). The backwash mechanism 21 turns the electromagnetic valve 21c on and off in a pulsating manner to eject the pulse jet from the nozzle 21a, and sprays the pulse jet from the open end 19a of the filter 19. The filter 19 to which the pulse jet is sprayed expands suddenly, and the high-pressure air that has become a jet flows backward from the inside to the outside of the filter 19, peeling off dust attached to the outside from the surface of the filter and dropping or scattering far away from the surface of the filter 19. In this way, the filter 19 is backwashed by the pulse jet.

[0028] In addition, the dust peeled off from the surface of the filter 19 of the backwash mechanism 21 falls or is blown away far from the surface of the filter 19, so it does not immediately reattach to the filter 19 even during filtering operation by the filter 19. Therefore, the filter unit 17 having the pulse jet type backwash mechanism 21 can backwash the filter 19 even during filtering operation. The amount of dust peeled off from the surface of the filter 19 is very small compared to the amount of grain stored. The dust is discharged when the brown rice is discharged from the brown rice tank 11, and is disposed of together with the bran in the next process, such as the rice polishing process.

[0029] Next, the blower 26 of the blower unit 18 will be described. The blower 26 can be appropriately selected to have the required air volume and pressure. For example, 3 Any known blower having a capacity of about 100 to 2000 (Pa) and a flow rate of 100 / min may be used. An air volume adjustment valve 27 connected to the exhaust port 25 of the blower 26 can finely adjust the air volume of the blower 26 by adjusting the opening degree.

[0030] 3 is a schematic diagram showing the control system for the ventilation device of the present invention. An operator room 50, which is responsible for controlling and monitoring the rice milling factory 1, is provided with a central control device 60 that operates, manages and monitors each device in the rice milling factory 1. This central control device 60 is electrically connected to each device in the rice milling factory 1 via the Internet 70. This connection may be wired or wireless. The central control device 60 may further be electrically connected to an external data server 80 that acquires operating parameters and the like of each device in the rice milling factory 1, and a portable information terminal 90 such as a smartphone or tablet.

[0031] In the ventilation device control system shown in Fig. 3, an upper limit sensor 33 capable of detecting the maximum amount of brown rice stored and a lower limit sensor 34 capable of detecting the minimum amount of brown rice stored (presence or absence of grains) are installed in the height direction of the brown rice tank 11 of the rice milling factory 1. This allows the lower limit sensor 34 to detect the timing of the start of brown rice being put into the brown rice tank 11 and the upper limit sensor 33 to detect the timing of the end of putting brown rice into the brown rice tank 11, so that the ventilation device 12 can be accurately controlled to be turned on and off. In other words, when multiple brown rice tanks 11 are installed side by side, instead of driving the multiple ventilation devices 12 on and off at the same time, the driving and stopping of each ventilation device 12 can be programmed according to the input and end of brown rice into each brown rice tank 11, so that the operation of each ventilation device 12 can be switched sequentially to operate in conjunction with each other.

[0032] In order to program the start / stop of the ventilation devices 12 and operate them in conjunction with each other, it is preferable to set different individual identification information (ID numbers) for each of the multiple ventilation devices 12.... Also, it is preferable to set different individual identification information (ID numbers) for each of the upper limit sensor 33 and lower limit sensor 34 installed in the brown rice tank 11. As described above, the individual identification information (ID numbers) for the multiple ventilation devices 12... may be stored in the memory unit 31 of the control unit 32 of the ventilation device 12. Also, it is preferable to set known RFID tags (not shown) near the respective sensor units of the upper limit sensor 33 and lower limit sensor 34 as individual identification information (ID numbers) for the upper limit sensor 33 and lower limit sensor 34 of the brown rice tank 11....

[0033] The operation of the grain tank ventilation system according to this embodiment will be specifically described with reference to Figures 3 to 5. Figure 4 is an operation flow diagram of the central control device that controls the entire grain tank ventilation system, and Figure 5 is a timing chart showing the operation of the grain tank ventilation system.

[0034] The following will be explained based on the flow diagram in Fig. 4. First, when the central control device 60 starts the process of receiving brown rice into the brown rice tank 11 (S100), the operator (or the central control device 60) designates a specific brown rice tank 11 from among the multiple brown rice tanks 11, and based on this, the central control device 60 issues a command to put brown rice into the designated brown rice tank 11 (S101). On the rice milling factory 1 side, based on the command from the central control device 60, switching and selection is performed on the branch valve 9, flow conveyors 10A, 10B, etc., and brown rice is put into the designated brown rice tank 11 from the brown rice inlet 40.

[0035] Then, when brown rice starts to be put into the brown rice tank 11, the lower limit sensor 33 installed in the brown rice tank 11 detects ON (S102). At this time, a comparison is made to see whether the individual identification information (ID number) of the brown rice tank specified by the central control device 60 in step S101 matches the individual identification information (ID number) of the RFID tag or the like of the lower limit sensor 33 detected in step S102 (S103). If the result of this judgment in S103 is "Yes," the next step S104 is reached, and a comparison is made to see whether the individual identification information (ID number) of the lower limit sensor 33 matches the individual identification information (ID number) of the ventilation device 12 installed in the brown rice tank 11 (S104).

[0036] The process of matching individual identification information (ID numbers) as in steps S103 and S104 is provided for the purpose of preventing erroneous operation or malfunction of other lower limit sensors 33 and ventilation devices 12 that are not the target when multiple brown rice tanks 11... and multiple lower limit sensors 33... and multiple ventilation devices 12... are installed. By ensuring the matching, the reliability of operation can be improved.

[0037] If the answer is "Yes" in S104, full-scale storage of brown rice in the brown rice tank 11 will begin, and the process proceeds to the next step S105, in which the central control device 60 issues a command to activate the ventilation device 12 with a predetermined identification number (ID number). In response to the command from the central control device 60, the transmission / reception unit 30 of the ventilation device 12 causes the control unit 32 of the ventilation device 12 to turn on the blower 26.

[0038] Then, brown rice is gradually stored in the brown rice tank 11 in the vertical direction, and when the stored amount reaches the maximum, the upper limit sensor 33 detects that it is ON (S106). Then, the ventilation device 12 is kept ON and waits for a predetermined time (for example, 3 to 10 hours) until rice polishing starts.

[0039] When rice milling begins, the operator (or the central control device 60) designates a specific brown rice tank 11 from among the multiple brown rice tanks 11, and based on this, the central control device 60 issues a command to discharge the brown rice into the designated brown rice tank 11 (S107). On the rice milling factory 1 side, based on the command from the central control device 60, switching and selection is performed on the on-off valve 13, weighing machine 14, flow conveyors 15A, 15B, lifter 16, etc., to discharge the brown rice from the designated brown rice tank 11. The brown rice then reaches the rice milling process, where it is milled.

[0040] Then, when discharge of brown rice from the brown rice tank 11 begins, the storage level drops, so that the upper limit sensor 33 installed in the brown rice tank 11 detects OFF (S108). Furthermore, if discharge of brown rice from the brown rice tank 11 continues, eventually the lower limit sensor 34 also detects OFF (S109). At this time, a comparison is made to see whether the individual identification information (ID number) of the RFID tag or the like of the upper limit sensor 33 detected in step S108, the individual identification information (ID number) of the RFID tag or the like of the lower limit sensor 34 detected in step S109, and the individual identification information (ID number) of the ventilation device 12 installed in the brown rice tank 11 match (S110).

[0041] The process of matching individual identification information (ID numbers) as in step S110 is intended to prevent erroneous operation or malfunction of other ventilation devices 12 that are not the target when multiple brown rice tanks 11... are installed and multiple upper limit sensors 33..., multiple lower limit sensors 34..., and multiple ventilation devices 12... are also installed. By ensuring the matching, the reliability of operation can be improved.

[0042] If the answer to the question S110 is "Yes," the discharge of brown rice from the brown rice tank 11 is terminated, and the process proceeds to the next step S111, where the central control device 60 issues a command to turn off the ventilation device 12 with a predetermined identification number (ID number) (S111). When the ventilation device 12 is turned off, the operation ends, and the ventilation device 12 of a brown rice tank other than the brown rice tank in question is controlled (S112).

[0043] Fig. 5 is a timing chart showing the operation of the ventilation device for the grain tank. The load-receiving and dust collector 35 in Fig. 1 operates only during the conveying path from when the brown rice is received by the load-receiving hopper 2 until it is separately put into the brown rice tank 11. In other words, during the period from when the brown rice is put into the brown rice tank 11 until it is discharged from the brown rice tank 11, the ventilation device 12 individually provided for the brown rice tank 11 operates, and the load-receiving and dust collector 35 does not operate to ventilate the brown rice tank 11.

[0044] With reference to Fig. 5, a timing chart is simulated under the following conditions. For example, four brown rice tanks 11 are arranged in parallel, it takes one hour for each brown rice tank 11 to store brown rice from when it is put in until it is full, and the time that brown rice is present in each brown rice tank 11 is four hours. The ventilation device 12 is then operated 30 minutes after the start of the brown rice being put in. In this case, the load-receiving dust collector 35 will stop after 4 hours have elapsed since it started operating (after 4h in Fig. 5). As for the alternative ventilation devices 12, No. 1 in Fig. 5 will operate for 0.5 to 4.5h, No. 2 in Fig. 5 will operate for 2.5 to 6.5h, No. 3 in Fig. 5 will operate for 3.5 to 7.5h, and No. 4 in Fig. 5 will operate for 4.5 to 8.5h. In other words, the load-receiving dust collector 35 and all four ventilation devices 12 No. 1 to No. 4 will operate for only 30 minutes from 4.5 to 5.0h, which is considered to be effective in reducing electricity consumption and saving energy.

[0045] As described above, according to the embodiment of the present invention, the ventilation device 12 for the grain tank 11 is provided on the upper part of the grain tank 11, which stores grain fed from the grain feed port 40, and includes a filter unit 17 for separating dust and air, and a blower unit 18 for exhausting the air separated by the filter unit 17 to the outside. The filter unit 17 is composed of a filter 19 for separating powder such as dust from the internal air, a housing 20 for storing the filter 19, and a backwash mechanism 21 for backwashing the filter 19. The blower unit 18 is provided in the housing 23 with a blower 26 having an intake port and an exhaust port, an air flow rate adjustment valve 27 connected to the exhaust port of the blower 26, and a control unit 32 for controlling the backwash mechanism 21 of the filter unit 17, the blower 26 of the blower unit 18, and the air flow rate adjustment valve 27. Therefore, since the ventilation device is provided directly on the upper part of the grain tank 11, it is possible to simplify the piping without installing an exhaust pipe by centralized piping, and to operate the exhaust device efficiently. Additionally, the internal temperature within the grain tank can be regulated to prevent condensation from forming within the grain tank.

[0046] Furthermore, a central control device 60 is provided which sends and receives communication data with the control device 32 and sends to the control device 32 commands to operate and stop the blower 26, operate and stop the backwash mechanism 21, and / or commands as to whether or not to adjust the opening of the air volume control valve 27, and if the control device 32 and the central control device 60 are able to communicate with each other via a specified network 70, commands can be sent remotely from the central control device 60 to the control device 32 of the ventilation device 12.

[0047] When there are multiple grain tanks 11, a pair of ventilation devices 12 are provided to correspond to each of the multiple grain tanks 11, and different identification information is set in the control unit 32 of each ventilation device 12. The central control device 60 compares the identification information of the grain tank 11 and the ventilation devices 12 and sends a command to the control unit 32. This allows the multiple grain tanks 11 and the multiple ventilation devices 12 to be managed in pairs, and by comparing the identification information, it is possible to prevent erroneous operation or malfunction of other ventilation devices 12 that are not the target, thereby improving the reliability of operation.

[0048] Furthermore, if the filter unit 17 of the ventilation device 12 and the blower unit 18 of the ventilation device 12 are fixed to each other with a plurality of buckle fittings 22 so that they can be removed without using tools, the filter unit 17 and the blower unit 18 can be easily disassembled and cleaned when performing maintenance or regular cleaning.

[0049] Although several embodiments of the present invention have been described above, the above-mentioned embodiments of the present invention are intended to facilitate understanding of the present invention and do not limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. Furthermore, the components described in the claims and the specification may be combined or omitted within the scope of solving at least part of the above-mentioned problems or achieving at least part of the effects. [Industrial Applicability]

[0050] The present invention can be applied to a ventilation system for grain tanks such as brown rice tanks and polished rice tanks that are installed in large numbers in rice mills and the like. The present invention can also be applied to any rice and wheat processing facility, such as a flour mill or a joint drying and preparation facility, in addition to rice and wheat processing facilities. The above-described embodiment can also be applied to various grain processing facilities, not limited to rice and wheat processing facilities. [Explanation of symbols]

[0051] 1 Rice mill 2 Receiving hopper 3 Grain frying machine 4 Rough sorter 5 Stone remover 6 Grain frying machine 7 Weighing machine 8 Grain lifting machine 9. Diverter Valve 10 Flow Conveyor 11 Brown rice tank 12 Ventilation system 13. On-off valve 14 Weighing machine 15 Flow Conveyor 16 Grain lifting machine 17 Filter unit 18 Blower unit 19 Filters 20. Housing 21 Backwash mechanism 22 Buckle (Snap Lock) 23 Housing 24 Air Intake 25 Exhaust port 26 Blois 27 Air flow control valve 28 Blower control unit 29 Air flow control valve control section 30 Receiving section 31 Storage section 32 Control section 33 Upper limit sensor 34 Lower limit sensor 35 Dust collector 40 Brown rice inlet 50 Operator Room 60 Central Control Unit 70 Internet 80 Data Server 90 Portable Information Terminal

Claims

1. A grain tank ventilation device comprising: a filter unit that is provided on an upper portion of the grain tank for storing grain fed through a grain feeding port, and that separates dust from air; and a blower unit that exhausts the air separated by the filter unit to the outside, The filter unit is composed of a filter that separates powder such as dust from internal air, a housing that houses the filter, and a backwash mechanism that backwashes the filter, The grain tank ventilation device is characterized in that the blower unit includes a housing, a blower having an intake port and an exhaust port, an air flow control valve connected to the exhaust port of the blower, and a backwash mechanism for the filter unit and a control unit for controlling the blower and the air flow control valve of the blower unit.

2. 2. The grain tank ventilation device according to claim 1, further comprising a central control device which transmits and receives communication data between said control device and said central control device and transmits to said control device commands to operate and stop said blower, to operate and stop said backwash mechanism, and / or to adjust the opening degree of said air volume control valve, said control device and said central control device being capable of communicating with each other via a predetermined network.

3. When there are a plurality of the grain tanks, the ventilation devices are provided in pairs corresponding to each of the plurality of grain tanks, and different identification information is set in the control unit of each of the ventilation devices; 3. The grain tank ventilation system according to claim 2, wherein the central control device compares identification information of the grain tank and the ventilation system and issues a command to the control unit.

4. 2. The grain tank ventilator of claim 1, wherein said ventilator filter unit and said ventilator blower unit are secured to one another by a plurality of buckles such that they can be removed without the use of tools.

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