JPS6015868B2 - hot air dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention provides a method for blowing hot air from above and below onto objects to be dried that are conveyed by a conveyor, and recirculating the hot air as necessary. In the hot air dryer, one side of the duct that blows hot air is directed downward to the upper wall hole of the dryer body, and the other side is directed downward to the side wall of the dryer body, and the inside of the hot air supply duct that expands gradually is installed. Regarding the installed hot air dryer.

"Conventional Technology" Conventionally, in a hot air dryer, one side of the hot air is blown upward or downward against the material to be dried as it passes through the tunnel-shaped main body of the dryer, and the other hot air is blown upward from the bottom. At the same time, the exhaust gas is discharged from the bottom of the compartment to the atmosphere after passing through a conveyor that conveys the material to be dried.
(See Spot No. 17).

However, since the other hot air is sent from the compartment 13 to the one compartment 12 via the pipe 24 and is sent out from the lower part of the compartment 12, it passes through the fiber partial layer in the compartment 13. All of the exhaust gas that has absorbed moisture will have an adverse effect on the fibers in the adjacent compartment 12.

Particularly, when the drying apparatus of the present invention is used to dry a large amount of perishable foods such as saki-ka, not only the upper layer but also the lower layer of saki-ka are sent out undried.

Therefore, in order to extend the drying time or raise the drying temperature, an infrared lamp must be installed and used in conjunction with the dryer body. The surface temperature inside the main body rises to nearly 80 to 90 degrees, causing it to warp and cause "burn" on the surface of the squid.
The following phenomenon will occur, resulting in poor yield.

"Problems to be Solved by the Invention" The present invention solves the above-mentioned drawbacks, thereby shortening the drying time of the material to be dried, eliminating drying unevenness, and achieving hot air drying with a good yield. By providing a hot air dryer and incorporating switching dampers into the outside air intake and recirculation ports of the hot air generator, drying time can be shortened and energy can be saved, thereby providing a hot air dryer with high thermal efficiency. There is a partition plate in the center that divides the dryer into left and right parts, and on one side of the partition plate there is a duct that guides the air from above to below, and on the other side there is a duct that guides the air from below. A duct is provided that guides the hot air upward, whereby the hot air heats the upper side of the material to be dried, absorbs moisture, becomes moist hot air, is discharged to the outside through the first exhaust duct, or is recirculated to the surface of the material to be dried. When an item passes through the partition plate, the hot air heats up from the bottom, absorbs moisture, becomes a humid hot air, and is either discharged to the outside through the second exhaust duct or recirculated, creating a hot air dryer with even drying. It is about providing.

"Means for solving the problem" The first hot air on one side is the blowing row 7 of the first hot air blowing device 16.
A hot air supply duct 18 whose inside gradually expands downward from
A Dunfan hot air supply duct 18 is disposed in the upper wall hole of the dryer body 10 so as to be guided through the duct, and the first exhaust gas is guided through the side opening 34 of the dryer body 10. 3
4th guide duct 3 whose inside is gradually rubbed upward from 3;
2 and the fourth guide duct 32 to be discharged to the outside.
A first exhaust duct 23 and an outside air suction port 25 are arranged on the side, and the second hot air on the other side is directed downward from the air outlet 37 of the second hot air blower 35 so that it is guided from below to above the conveyor 13. A hot air blower duct 38 and a duct 39, the inside of which gradually expands, are disposed in the side wall hole of the dryer main body 10, and a first First and second hot air generators 20 and 42 are disposed through guide ducts 19 and 41, and the first and second hot air generators 20 and 42 are connected to the first and second exhaust ducts 23 and 42 communicating with the outside, respectively. 45 recirculation port and the first and second exhaust ducts 2
The outside air suction ports 25, 47, which are not connected to each other, are attached to the recirculation port and the outside air suction ports 25, 47.
are provided with first and second shirt levers 29 and 51 that move forward or backward by operating handles 27 and 49, respectively, and when one is closed by the operation of the first and second shirt flaps 29 and 51, the other one is closed. The effective damper 26, 4 is closed.
8. A hot air drying device characterized by being provided with:

"Function" The belt conveyor (not shown) on which the material to be dried, for example, "sakishi, ka" is continuously arranged at the entrance of the dryer main body lo, and the net conveyor 13 in the dryer main body 10 are driven. At the same time, steam is supplied to the left and right first and second hot air generators, for example, the erofin heaters 20 and 42.

The ferrofin heaters 20 and 42 include a temperature controller (
(not shown), and a solenoid valve is set on the steam inlet side, and steam is supplied (on) or cut off (off) according to the set temperature.

Temperature sensors (not shown) are preset in the top wall hole and side wall hole through which hot air is supplied to the dryer main body 10.

First, on the right side in Figures 1 and 3, and on the left side in Figure 4,
Air taken in from outdoors or indoors is removed from dust by a filter at the inlet, heat is exchanged between the two Erofin heaters, and then a hot air blower such as a Sirocco fan is used to send hot air to the dryer via the hot air stand duct 18. It is inserted into the dryer main body 10 through a hole in the upper wall of the main body 10.

The hot air blown from the upper wall hole of the dryer main body 10 becomes green-containing hot air that absorbs moisture from the "small" surface of the running net conveyor 13, and flows through the fourth guide duct 32 and the third guide duct 32.
Depending on the position of the shutter 20 of the suction port 26, a part of the moist hot air passes through the second guide duct 24 and is discharged to the outdoors from the first exhaust duct 23 through the guide duct 30, and then returns to the Erofin heater 201. Erofin heater 2 is supplied with clean air taken in from outdoors or indoors.
Heat is exchanged from 0', and the hot air is sent into the dryer main body 10. Next, on the left side of FIGS. 1 and 3, clean air taken in from outdoors or indoors is heat exchanged by the erofin heater 42 and becomes hot air.
The hot air is supplied to the side wall hole of the dryer body 10 through the hot air supply duct 38 by a blower such as a sirocco fan of the hot air blower 35 .

The hot air supplied to the lower side of the net conveyor 13 running from the lower side wall hole of the dryer main body 10 is
Moisture is absorbed from the upper surface and the lower surface, and becomes moist hot air through the hole in the upper wall of the dryer main body 10 through the fourth guide duct 53, fifth guide duct 54, and second exhaust duct 45, and is discharged outdoors. Depending on the position of the second shutter 51 of the suction port 44, a portion of the moist hot air is supplied to the Erofin heater 42 again through the second guide duct 46, together with clean air taken in from outdoors or indoors. Heat is exchanged by the erofin heater 42, and the hot air is generated into the dryer main body 1.
sent into 0.

As mentioned above, the main body of the dryer is a partition plate (see Figures 1 and 3).
Since the "sakiika" on the running net conveyor is heated and absorbed moisture by the hot air blown from above in front of the partition plate, when it crosses the partition plate, the next The hot air blown from below heats and absorbs moisture in the lower surface (lower layer), creating a "sasaika" with even drying.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The main body of the dryer is rectangular in shape, and partition plates 11 and 12 are provided at the top and bottom of the center of the main body 10 of the dryer.

The partition plates 11 and 12 are attached to the flume, and a gap suitable for the passage of the net conveyor 13 and the material to be dried on the net conveyor 13, or a heat-resistant rubber sheet that does not hinder the passage thereof, is suspended.

The front and back of the dryer main body 10, that is, the front part where the items to be dried are brought in is an inlet 14, and the rear part where the items to be dried are taken out is an outlet 15.
corresponds to

(See Figures 1 and 3) 16 is the first
In the hot air blower, the first hot air blower 16 enters the dryer main body 10 through a hot air supply duct 18 that gradually expands downward from the air outlet 17 of the air blower 16 to the top of the dryer main body 10. Sekiguchi is attached to the hole in the wall.

One end of a first guide duct 19 is connected to the side of the hot air blower 16, and a hot air supply port 21 of a hot air generator 20 such as an erofin heater is connected to the end of the first guide duct 19. The suction port 22 of the hot air generator 20 has a diameter approximately twice the diameter of the first exhaust duct 23, and a second guide duct 2 is connected to the first exhaust duct 23.
4 are connected to each other, and the second guide duct 24 has the first exhaust duct 23 on the right side and the outside air suction port 25 on the left side in FIG.

A functional damper 26 is provided at the suction port 22,
The switching damper 26 has a first shutter 29 attached to a holder 28 in the form of a ball screw or a nut that moves forward or backward by operating a handle 27 attached to the second guide duct 24. The shutter 29 moves on a guide rail provided at the suction ports 22, so that when one of the suction ports 22 (the first exhaust duct 23) is closed, the other (the outside air suction port 25) is closed.

A dust removal filter (not shown) is attached to the outside air intake port.

A third guide duct 30 connecting the first exhaust duct 23 and the second guide duct 24 is provided.

A fourth guide duct 32 is connected to the lower closed end 31 of the third guide duct 30 .

(Refer to FIG. 5) The fourth guide duct 32 is connected to an L-shaped duct 33 with its interior gradually extending downward, and the L-shaped duct 33 is installed at a side end 34 of the dryer main body 10. has been done.

(See Figure 3) Reference numeral 35 denotes a second hot air blower supported by a frame 36 on the side of the dryer main body 10, and the second hot air blower 35 is inserted downward from the air outlet 37 of the blower 35. A hot air supply duct 38 is formed which gradually expands, and an L-shaped duct 3 is connected to the hot air supply duct 38 at one end.
The other end of the dryer body 10 is connected to the side opening end of the dryer main body 10.

Further, on the left side of the second hot air blowing device 35 in FIG. 4, one end of a second hot air generating device 42 such as an erofin heater, that is, a second hot air supply port 43, is installed via a first guide duct 41.

The suction port 44 of the second hot air generator 42 has a diameter that is approximately twice the diameter of the second exhaust duct 45, and is connected to a side wall hole of the fourth guide duct 53 that is connected to the second exhaust duct 45. A second guide duct 46 is arranged in a vertical direction, and the suction port 44
In FIG. 3, the second exhaust duct 45 is connected to the left side, and the outside air intake port 47 is connected to the right side.

A switching damper 48 is provided at the outside air suction port 47, and the switching damper 48 has a holding odor 50' formed of a ball screw or nut that moves forward or backward by operating a handle 49 attached to the second guide duct 46. A second shutter 51 is attached.

By moving the second shutter 51 to either the left or right on a guide rail provided at the suction port 44, one of the suction ports 44 (fourth guide duct 53) is closed from communicating with the second hot air generator 42. When the other side (outside air intake port 47)
is opened □, and the humid and hot air from the dryer main body 10 passes through the third guide duct 52 and the fourth guide duct 53 to the second exhaust duct 45.

The third guide duct 53 has a lower end opening into the upper wall hole (on the left side in FIGS. 1 to 3) of the dryer main body 10, and an upper end connected to one end of the vertical fourth guide duct 53.

The end of the fourth guide duct 53 is connected to one end of an L-shaped fifth guide duct 54 that is connected to the second exhaust duct 45 . Motors 60 and 61 drive the fans of the hot air blowers 16 and 35 via belts and pulleys.

62 is a cooling fan disposed on the outlet 15 side of the dryer body 10; 63 is a reducer 64 that drives a sprocket 65 that engages with a chain that is integrated with the net conveyor 13; Seshimuru motor, 66
67 is a frame that supports the first hot air generator 20; 67 is a belt cover for the first and second hot air blowers 16, 45; 68 is a frame that supports the first hot air generator 20;
is a scaffold, and 69 is a frame that supports the second hot air generator 42.

``Effect of the invention'' 0 The main body of the dryer is divided into left and right sides by a partition plate (see Figures 1 and 3).
In front of the partition plate, the upper surface part (upper layer part) is heated and absorbs moisture by the hot air blown from above, and once it crosses the partition plate, the hot air blown from below causes it to heat up and absorb moisture.
The lower surface part (lower layer part) is heated and absorbs moisture, creating a "sasaika" that is evenly dried.

In short, in the first half, the surface of the material to be dried is heated and in the second half, the back surface is heated and absorbed, so the drying time is significantly shortened compared to conventional methods in which hot air is blown only from the top to the bottom or from the bottom to the top. Ru.

In addition, the suction port on the front side of the hot air generator is composed of a second guide duct for recirculating air and an outside air suction port for taking in outside air, and the second guide duct and the outside air suction port actuate a switching damper to move the shutter. As a result, the suction port is adjusted, so that appropriate hot air can be supplied by the temperature sensor and control device set in the top coating hole and side wall hole depending on the outside temperature, humidity, temperature inside the dryer body, and the type of material to be dried. 0, and the humid hot air can be used again, making it possible to save energy. Particularly when the temperature inside the dryer body does not rise smoothly, such as in the middle of winter, shuttering the outside air intake port that communicates with the outside air has the effect of further increasing thermal efficiency.

According to the present invention, a erofin heater using steam as a heat source is suitable as the heating device, but an air heating device using a heat source such as an electric or gas burner may also be used.

The conveyor is preferably a net conveyor that has good tensile strength and heat resistance and is suitable for hot air to pass through, but is not necessarily limited to this. Unitized comparers and perforated conveyors can also be used.

The switching damper built into the front of the heating device is moved forward or backward manually, but it can be operated automatically in combination with a push button switch, an electric motor, a thermostat, a microcomputer, etc.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall front view of the device of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a front perspective view of the device of the present invention, and Fig. 4 is a rear perspective view of the device of the present invention. , Figure 5 is Figure 1A
- A side view; FIG. 6 is a side view taken along line B-B in FIG. 1;

10: dryer main body, 11, 12: partition plate, 14: entrance,
13: conveyor, 15: outlet, 16, 35: hot air blower, 25, 47: outside air suction port, 20, 42: hot air generator, 23, 45: 9E air duct.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. The dryer main body 10, which has entrances and exits 14 and 15 for the materials to be dried at the front and rear, is provided with partition plates 11 and 12 that divide the dryer main body 10 into left and right parts, and the partition plates 11 and 12 are connected to the conveyor. 13 and a material that does not obstruct the passage of the dried material on the conveyor 13, and the partition plate 1
The hot air on one side of the conveyor 13 is guided downward from the top of the conveyor 13, and the hot air on the other side of the conveyor 13 is guided downward from the top of the conveyor 13.
In the hot air drying device that is guided upward from the bottom, the first hot air on the one side is supplied to the air outlet 17 of the first hot air blowing device 16.
A hot air supply duct 18 whose width gradually expands downward from
The hot air supply duct 18 is disposed in the upper wall hole of the dryer main body 10 so that the first exhaust gas is guided through the duct 33 connected to the side mouth end 34 of the dryer main body 10.
A fourth guide duct 32 whose width gradually decreases upward.
A first exhaust duct 23 and an outside air suction port 25 are arranged in the fourth guide duct 32 so that the second hot air is discharged to the outside through the conveyor 13, and the second hot air on the other side is guided from below to above the conveyor 13. The air outlet 3 of the second hot air blower 35 is
Hot air supply duct 3 whose width gradually expands downward from 7
8 and a duct 39 are arranged in the side wall hole of the dryer main body 10, and the first. In front of the second hot air blower 16, 35, the first hot air blower is connected via the first guide duct 19, 41. The second hot air generators 20 and 42 are arranged in series, and the first. The second hot air generator 20, 42 is connected to the first hot air generator 20, 42 which communicates with the outside. The recirculation port of the second exhaust duct 23, 45 and the first exhaust duct 23,45. second exhaust duct 23,
The outside air suction ports 25, 47 which are not connected to the recirculation port and the outside air suction ports 25, 47 are provided with the first air inlets 25, 47, which are moved forward or backward by the operation of the handles 27, 49. Second shutters 29 and 51 are provided respectively, and the first and second shutters 29 and 51 are respectively provided. A hot air drying apparatus characterized in that switching dampers 26 and 48 are provided, so that when one is closed by the operation of the second shutters 29 and 51, the other is opened.