dryer

Abstract

To uniformly dry objects in a tray on each stage even when the trays are installed side by side on a plurality of stages.SOLUTION: In a shelf frame 110 in a drying room 100, a plurality of drying shelves 120 are provided. On tray receivers 122 for the drying shelves 120, trays 124 are put, respectively, in which seeds to be dried are stored. Into an air supply chamber 220 of an air supply room 200, drying air is supplied from an air supply port 302 by a circulation fan FM of a drying control unit 300. The air is fed to the tray receivers 122 by blowing fans 230, flows downward from the tray receivers 122 to the front side of the drying room 100 after drying the seeds in the trays 124, and is exhausted through the underfloor side from an exhaust port 304 to the drying control unit 300 side. The fan control device 400 controls the operation of the blowing fans 230 to uniform the amount of air to be blown to the trays 124.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dryer for, for example, plant seeds, and particularly to an improvement in a dryer suitable for a dryer having multiple stages of drying trays. [Background technology]

[0002] An example of a dryer with multiple trays is the "Soaked Rice Seed Drying Device" described in Patent Document 1 below. In this device, net bags of soaked rice seeds are set in each of multiple stacked drawers and stored in the dryer frame. When the dry air supply means is driven, dry air passes through the raw material net bags from one side of each drawer, exits to the other side, and is then exhausted outside the machine via the exhaust duct and exhaust port. This allows the soaked rice seeds in each drawer to be dried individually. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2008-14517 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned background art, the dry air is supplied from the underside of one side of the dryer where the drawer bodies are stacked, and the dry air is exhausted from an exhaust duct provided on the other side of the dryer. This results in an uneven supply of dry air to the stacked drawer bodies. In other words, the lower drawer body has a larger air volume than the upper drawer body, which may result in different drying conditions for the seeds in each drawer body.

[0005] The present invention focuses on the above points, and aims to provide a dryer that can uniformly dry the objects on each tray, even when the trays are stacked in multiple tiers. [Means for solving the problem]

[0006] The present invention is a dryer that blows air from a blower control unit into a drying chamber in which a plurality of trays containing objects to be dried are arranged side by side, and dries the objects to be dried. The drying chamber is partitioned by a partition wall, and includes an air supply chamber that is supplied with air from the drying control unit, a tray receiver that places the trays and blows air to the objects to be dried on the trays, a blower fan provided at a portion extending into the air supply chamber of each tray receiver, and a fan control device that controls the rotation speed of each blower fan. The fan control device By inverter control, is characterized by controlling the rotation speed of each blower fan so that the air volume for each tray becomes uniform.

[0007] According to one of the main forms, a dispersion plate for rectifying the air from the blower fan is provided on the tray receiver. The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

Effect of the Invention

[0008] According to the present invention, a blower fan is provided for each of the trays arranged in multiple stages, and the air volume is By inverter control performed, so that the air volume in each tray can be made uniform, Also, since the air sent from the blower fan is evenly distributed over the entire tray by the dispersion plate, and the object can be dried uniformly.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0010] Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

Example

[0011] Figure 1 shows the overall view of an embodiment of the dryer of the present invention. In the figure, a drying chamber 100 is provided on the front side (left side of the figure) of the dryer, and a drying control unit 300 is provided on the rear side (right side of the figure). An air supply chamber 200 is provided between the drying chamber 100 and the drying control unit 300.

[0012] Among these, the drying chamber 100 includes a shelf frame 110, and the shelf frame 110 includes a plurality of drying shelves 120. Each drying shelf 120 is adapted to place a tray 124 for accommodating seeds or the like on the upper surface side of a tray receiver 122, and the bottom surfaces of those trays 124 are in a mesh shape so as to be air-permeable. Thereby, as indicated by the arrow in the figure, the air blown from the tray receiver 122 passes through the bottom surface of the tray 124 and is sent to the object to be dried. The tray receiver 122 has a configuration that is inclined so as to be deeper toward the air supply side (right side of the figure).

[0013] Next, the air supply chamber 200 is partitioned from the drying chamber 100 by a partition wall 210, and includes an air supply chamber 220 for supplying drying air to the drying chamber 100. In the air supply chamber 220, the above-described tray receiver 122 is extended, and a blower fan 230 is provided at each end thereof. Note that a dispersion plate 126 for air distribution is provided on the air output side of the blower fan 230 as necessary. Further, between the drying chamber 100 and the drying control unit 300 on the rear side, an air supply port 302 is provided on the upper side, and an exhaust port 304 is provided on the lower side.

[0014] That is, the air supplied from the drying control unit 300 to the air supply chamber 220 of the air supply chamber 200 through the air supply port 302 is not directly supplied to the drying chamber 100 because of the partition wall 210, but is supplied from the tray receiver 122 to the drying chamber 100 by the blower fan 230. Also, it hits the seeds of the tray 124 of the tray receiver 122. The air discharged from each tray 124 is guided from the front side to the floor side of the drying shelf 120 and returns to the drying control unit 300 from the exhaust port 304. The drive control of each blower fan 230 is performed by the fan control device 400.

[0015] Next, various types of drying control units 300 may be applied. In the illustrated example, it includes a heater unit 310, a cooler unit 320, a unit control device 330, and a fan control device 400. An intake port OA and an exhaust port EA are respectively provided on the back side of the drying control unit 300. The cooler unit 320 includes a dehumidifier (not shown). Thus, the heated air and the dehumidified / cooled air are supplied from the circulation fan (main fan) FM of the drying control unit 300 to the intake chamber 220 of the intake chamber 200.

[0016] Temperature and humidity sensors are provided in the drying chamber 100, the air supply chamber 200, and the drying control unit 300 as needed. Referring to the detection results of these sensors, the operation of the drying control unit 300 is controlled by the unit control device 330. The operating state is displayed on the display 312 installed on the upper front side of the dryer. For example, during operation / stopping, remaining time, temperature, humidity, dew point temperature, etc. are displayed.

[0017] Next, the operation of the air supply chamber 200 in this embodiment will be described. Dry air for drying is supplied from the circulation fan FM of the drying control unit 300 to the air supply chamber 220 of the air supply chamber 200 through the air supply port 302. The air is sent to the tray receiver 122 by the blower fan 230. After drying or cooling the seeds of the tray 124 from the tray receiver 122, it flows downward on the front side of the drying chamber 100, passes through the floor side, and is exhausted to the drying control unit 300 side from the exhaust port 304.

[0018] In this case, conventionally, the air supplied from the drying control unit 300 would flow in an easily flowing direction, resulting in non-uniformity for each tray 124. Therefore, in this embodiment, the operation of each blower fan 230 is controlled by the fan control device 400 so that the air volume supplied to each tray 124 is uniform. Specifically, control is performed by an inverter control method, and the frequency of the inverter control is set for each blower fan 230 in each stage. This setting is performed by the touch panel 410 provided on the door at the front of the drying chamber 100.

[0019] In the case of this embodiment, since air is supplied from the upper side of the air supply chamber 200, conventionally, the force of the wind would be weaker in the lower part than in the upper part of the tray 124. Therefore, in this embodiment, the touch panel 410 is operated to adjust the frequency of the inverter control, and the fan control device 400 controls so that the current of each blower fan 230 becomes uniform. If the current of the blower fan 230 is the same, it can be considered that the air volume is also the same. As a result, the air volume supplied to each tray 124 is made uniform vertically in the drying rack 120.

[0020] Figure 2 shows the situation. In the same figure (A), when there is no blower fan 230, the air volume is larger for the tray 124 located in the upper part, and the air volume for the tray 124 located in the lower part becomes smaller. On the contrary, according to this embodiment, as shown in the same figure (B), the air volume of each tray 124 is uniformly controlled by the blower fan 230. Also, by the dispersion plate 126, the air sent from the blower fan 230 is evenly distributed over the entire tray 124.

[0021] As described above, according to this embodiment, even when a plurality of trays 124 are stacked and installed, since a blower fan 230 is provided for each tray 124, it is possible to make the air volume uniform for the plurality of trays 124, and the seeds stored in each tray 124 can be dried uniformly.

[0022] <Other Embodiments> Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, the following are also included. (1) The shapes and structures shown in the above embodiments can be changed so as to exhibit the same functions. For example, the number of stacked stages and the number of installation rows in the lateral direction of the trays 124 in the drying chamber 100 may be appropriately changed as needed. (2) The configuration of the drying control unit 300 shown in the above embodiments is also an example, and various configurations may be used. (3) In the above embodiments, the blower fan 230 is provided at the end of the tray receiver 122. However, the direction of the blower fan 230 (the direction of the rotation axis) may be either the horizontal direction or the vertical direction, or a direction inclined from the horizontal and vertical directions. Further, it may be provided on the side surface of the tray receiver 122. (4) In the above embodiments, the blower fan 230 is provided for each tray receiver 122. However, the blower fan may be provided at a ratio of one for a plurality of upper and lower stages (for example, two stages). (5) Although seeds are one suitable example of the application target of this embodiment, it is applicable to various objects. (6) In the above embodiments, the trays 124 are stacked in the vertical direction. However, even when the trays are arranged in the horizontal direction, in order to make the air volume uniform in the same manner, a blower fan may be provided for each tray. FIG. 3 shows this state, and the tray receivers 122 and the trays 124 are arranged in the horizontal direction. The air volume for each tray 124 is uniformly controlled by the blower fan 230.

Industrial Applicability

[0023] According to the present invention, a blower fan is provided for each of the trays arranged in multiple stages to perform the air volume By inverter control Therefore, it is possible to equalize the air volume in each tray, Also, since the air sent from the blower fan is evenly distributed over the entire tray by the dispersion plate, and the object can be dried uniformly, so it is suitable for a dryer for seeds and the like.

Explanation of Reference Numerals

[0024] 100: Drying chamber 110: Shelf frame 120: Drying shelf 122: Tray receiver 124: Tray 126: Diffuser plate 200: Air supply chamber 210: Partition wall 220: Air supply chamber 230: Blower fan 300: Drying control unit 302: Air supply port 304: Exhaust port 310: Heater unit 320: Cooler unit 330: Unit control device 312: Display 400: Fan control device 410: Touch panel EA: Exhaust port FM: Circulation fan OA: Intake port

Claims

1. A dryer that blows air from a drying control unit into a drying chamber in which a plurality of trays containing objects to be dried are arranged side by side to dry the objects to be dried, The drying chamber is partitioned by a partition wall, and an air supply chamber that is supplied with air from the drying control unit, A tray holder that places the tray and blows air to the object to be dried on the tray, A blower fan provided at a portion extending into the air supply chamber of each tray holder, A fan control device that controls the rotation speed of each blower fan, Comprising, The fan control device controls the rotation speed of each blower fan so that the air volume blown for each tray is uniform by inverter control. The dryer is characterized by this.

2. The dryer according to claim 1, characterized in that a dispersion plate for straightening the air from the blower fan is provided on the tray holder.

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