KR102206871B1 - Method For Operating of Dryer Having Ceramic Heating Element - Google Patents

Abstract

The present invention relates to a method of operating a dryer including a ceramic heating element, more specifically, the steps of moving the upper unit 300 above a predetermined height; Loading an object to be dried on top of a plurality of flat plate main heaters 230 stacked horizontally; Moving the upper unit 300 downward so that the lower end of the upper unit 300 is in close contact with the groove 134 of the bottom frame 130; Heating the chamber 310 to a predetermined temperature by supplying power to the main heater 230 and the side heater 240; Discharging the air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined degree of vacuum; Opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure after a predetermined time elapses; And discharging the dried object after moving the upper unit 300 to a predetermined height. It relates to a method of operating a dryer including a ceramic heating element.

Description

Dryer operating method including ceramic heating element {Method For Operating of Dryer Having Ceramic Heating Element}

The present invention relates to a method of operating a dryer including a ceramic heating element, and more particularly, minimizing deterioration of the quality of a to-be-dried product through heat generation and decompression using a dryer including a ceramic heating element, and reducing energy cost and productivity. It relates to a method of operating a dryer including an improved ceramic heating element.

Dryers are used in various fields for the purpose of removing moisture, etc. For example, agricultural products in the agricultural field are not deteriorated and undergo a drying process for the purpose of long-term storage or to reduce transportation costs.

The general drying method is roughly divided into natural drying by sunlight and forced drying by a mechanical drying device. In particular, the forced drying generally used in recent years is slightly different, but a heating means is provided in the drying furnace to dry. A typical heating means is a heater, and it is a method of obtaining a dried product by evaporating moisture contained in the object by heating air warmly using a heater and continuously contacting the heated air with the object to be dried.

However, in the case of using such a hot air convection method, a high power cost is required to maintain the air at a high temperature, and the drying time increases, resulting in an increase in drying costs due to a decrease in productivity and work efficiency. In particular, the hot air convection method removes moisture in the vicinity of the surface of the object to be dried, but the moisture in the object is not sufficiently dried, so there is a concern that the quality of the dried product may be deteriorated.

Meanwhile, Korean Patent No. 1251971 discloses a conveyor belt 20 supported by a conveyor frame and made of a mesh so that agricultural and marine products to be dried can be transported simultaneously with drying; A fan frame 50 supported by a support frame and installed on the top of the conveyor; A plurality of far-infrared ceramic heaters 40 installed at regular intervals on the bottom of the fan frame 50 so that agricultural and marine products are continuously dried by far-infrared rays while being transported; It is installed on the upper surface of the fan frame 50 between the plurality of ceramic heaters 40 so as to evaporate moisture generated from agricultural and marine products dried by far infrared rays by the ceramic heater 40 at a predetermined distance from the ceramic heater 40 A plurality of drying fans 30 installed intersecting with each other; And a reflecting plate 60 connected to the conveyor frame and installed to be located under the conveyor belt 20 in order to reflect the hot air by the drying fan and the far-infrared rays of the ceramic heater 40. An agricultural and marine product dryer using a far-infrared ceramic heater is disclosed.

According to the technology disclosed in the prior literature, since agricultural and marine products are dried using the far-infrared radiation wavelength band, there is an advantage that relatively uniform drying is possible on the inner/outer surfaces of the object to be dried.

However, in the prior literature, since a far-infrared ceramic heater manufactured with a ceramic pocket in which the heating wire is wound in the form of a spring and embedded in the center and the temperature sensing sensor is inserted is used, it is difficult to maintain the surface temperature of the heater uniformly. There is a problem of poor quality and low energy efficiency.

In addition, there is a disadvantage that it takes a lot of drying time because it simply relies on heating or blowing.

Korean Registered Patent No. 1251971

The present invention was conceived to solve the above-described problem, and it is possible to dry while minimizing deterioration of the quality of the object to be dried by maintaining the temperature of the heating element uniformly, and to complete drying in a short time, energy It is an object of the present invention to provide a method of operating a dryer including a ceramic heating element which is advantageous in terms of cost and productivity.

A method of operating a dryer including a ceramic heating element of the present invention for solving the above problem includes the steps of: moving the upper unit 300 above a predetermined height; Loading an object to be dried on top of a plurality of flat plate main heaters 230 stacked horizontally; Moving the upper unit 300 downward so that the lower end of the upper unit 300 is in close contact with the groove 134 of the bottom frame 130; Heating the chamber 310 to a predetermined temperature by supplying power to the main heater 230 and the side heater 240; Discharging the air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined degree of vacuum; Opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure after a predetermined time elapses; And discharging the dried object after moving the upper unit 300 above a predetermined height.

In addition, in the method of operating a dryer including the ceramic heating element of the present invention, the degree of vacuum is preferably -99 kPa or less.

In addition, in the method of operating a dryer including the ceramic heating element of the present invention, the object may be an agricultural product and/or aquatic product.

In addition, in the dryer operating method including the ceramic heating element of the present invention, it is preferable that the object is a pepper.

In addition, in the method of operating the dryer including the ceramic heating element of the present invention, the temperature inside the chamber 310 may be 120° C. or less.

In addition, in the method of operating the dryer including the ceramic heating element of the present invention, the temperature inside the chamber 310 may be 60°C to 120°C.

In addition, in the dryer operating method including the ceramic heating element of the present invention, after the step of discharging air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined vacuum level, the main heater 230 and the A step of heating the side heater 240 so that the temperature inside the chamber 310 becomes a predetermined temperature by supplying power may be performed.

In addition, in the dryer operating method including the ceramic heating element of the present invention, the step of discharging air in the chamber 310 through the valve 133 so that the chamber 310 is at a predetermined vacuum level, and the main heater 230 and the side heater Heating the chamber 310 to a predetermined temperature by supplying power to 240 may be performed simultaneously.

In addition, in the dryer operating method including the ceramic heating element of the present invention, the step of discharging air in the chamber 310 through the valve 133 so that the chamber 310 is at a predetermined vacuum level, and the chamber 310 after a predetermined time elapses. ) Cooling to a predetermined temperature may be further performed between the steps of opening the valve 133 so that the inside becomes atmospheric pressure.

In addition, in the dryer operating method including the ceramic heating element of the present invention, opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure, and discharging the dried object after moving the upper unit 300 above a predetermined height. Cooling to a predetermined temperature may be further performed between the steps.

According to the method of operating a dryer including a ceramic heating element of the present invention, a dryer with a ceramic heating element is used to release the generated heat in the form of far-infrared rays, and the radiated far-infrared rays are transmitted through a radiation method. It has the advantage of not only being able to obtain the power supply, but also reducing the power cost.

In addition, according to the method of operating the dryer including the ceramic heating element of the present invention, there is an advantage that the drying time can be shortened because the inside of the dryer is operated under reduced pressure.

1 is a front perspective view of a dryer including a ceramic heating element according to a preferred embodiment of the present invention.
2 is a perspective view as viewed from behind a dryer including a ceramic heating element according to a preferred embodiment of the present invention.
3 is a perspective view taken along the AA′ direction of FIG. 1.
4 is a perspective view showing a state in which the third side plate and the third side heater are separated in FIG. 2.
5 is a perspective view for explaining a coupling structure between the main heater and the shaft.
6 is a perspective view as viewed from the front for explaining the internal structure of the side plate, the side heater, and the upper unit.
7 is a perspective view as viewed from the rear as a view for explaining the internal structure of the side plate, the side heater and the upper unit.
8 is a flowchart illustrating a method of operating a dryer including the ceramic heating element of the present invention.

In the present application, terms such as "include", "have" or "have" are intended to designate the presence of features, numbers, steps, components, parts, or combinations thereof described in the specification, but one or more other It is to be understood that the presence or addition of features, numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being excluded.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "just between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

Hereinafter, a method of operating a dryer including a ceramic heating element according to the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for the same elements in the drawings, and duplicate descriptions for the same elements are omitted.

1 is a front perspective view of a dryer including a ceramic heating element according to a preferred embodiment of the present invention, FIG. 2 is a perspective view from the rear view of a dryer including a ceramic heating element according to a preferred embodiment of the present invention, and FIG. It is a perspective view cut along the AA′ direction of.

As shown in Figs. 1 to 3, the dryer including the ceramic heating element according to the present invention comprises a frame 100 having a substantially rectangular parallelepiped shape, and a lower unit 200 and an upper unit built into the space of the frame 100. 300).

First, the frame 100 will be described in detail. The frame 100 performs a function of moving the upper unit 300 up and down while receiving and supporting the lower unit 200 and the upper unit 300. The frame 100 as described above is a long polygonal rod, and four vertical frames 110 vertically positioned at each corner of the frame 100 at a predetermined interval so as to form an approximately square. A pair of first horizontal frames 121 facing each other so as to connect and fix the two vertical frames 110 while being supported on the upper end of the four vertical frames 110, and the pair of first horizontal frames (121) It includes a horizontal frame 120 including one second horizontal frame 122 for connecting and fixing the first horizontal frames 121 to each other while being supported on the upper surface.

Meanwhile, the second horizontal frame 122 may further include a lifting part 123 and a chain pocket 124 connected to the lifting part 123, wherein the chain pocket 124 includes the upper unit 300. It is a pocket for storing a chain (not shown) that is connected when lifting or lowering, and the lifting part 123 to which the chain pocket 124 is connected is a second horizontal frame ( 122 is movably connected, and the other side is provided with a first hook 125.

In addition, the bottom frame 130, which is fixed after the lower ends of the four vertical frames 110 are seated, has a substantially rectangular plane viewed from above, and in the vicinity of the central portion, more specifically, the position where the lower unit 200 is seated, will be described later. A cylindrical moisture receiving groove 131 recessed to a predetermined depth is provided to collect moisture discharged from the object to be dried, and the moisture collected in the moisture receiving groove 131 is intermittently or non-intermittently discharged to the outside. The pipe 132 is connected to the water receiving groove 131 in a protruding state at a predetermined position. In addition, a valve 133 is mounted at a predetermined position of the pipe 132, and the valve 133 is for discharging the air in the lower unit 200 and the upper unit 300 to the outside or for discharging collected moisture. way solenoid valve.

A circular groove 134 having a predetermined depth and width is formed in the bottom frame 130 at the outer circumference where the lower unit 200 is seated, more specifically, at the portion where the lower end of the side surface contacts when the upper unit 300 is lowered. It may be formed, and the groove 134 may support the upper unit 300 stably, as well as increase the sealing degree of the lower unit 200 and the upper unit 300. Although not shown in the drawings, it is obvious that a packing (not shown) may be provided in the groove 134 to improve airtightness.

In addition, it is preferable that the leg 140 is provided on the outer bottom of the floor frame 130, more particularly near the corner, and it is more preferable that a wheel is provided to move the dryer of the present invention.

Next, the lower unit 200 will be described in detail.

The lower unit 200 is located in a flat portion between the moisture receiving groove 131 and the concave groove 134 to be higher than the upper portion of the bottom frame 130. The horizontal cross section is substantially rectangular, and includes the side plate 210, the top plate 220, the main heater 230, the side heater 240, the shaft 250, and the cable bayer 260.

The side plate 210 is disposed to cover the remaining three surfaces except for the front portion for loading or unloading the object to be dried. That is, a first side plate 211 vertically positioned with a predetermined width and height, and a second side plate 212 positioned facing each other with the first side plate 211 spaced apart from the first side plate 211 by a predetermined distance, In addition, the first side plate 211 includes one edge and a third side plate 213 positioned at one edge of the second side plate 212.

The upper plate 220 has a substantially rectangular shape, such that the first side plate 211, the second side plate 211 can be covered to cover a virtual space consisting of the first side plate 211, the second side plate 212, and the third side plate 213. It is located above the (212) and the third side plate (213).

The main heater 230 is located horizontally in the space surrounded by the first side plate 211, the second side plate 212 and the third side plate 213, and is placed in a place where moisture is removed by heating the object to be dried. , A plurality of stacked with a predetermined distance apart.

Here, the main heater 230 is a heating element made of a ceramic material, receives external power (not shown) to generate heat, and simultaneously emits infrared rays, more specifically, far infrared rays. Since the energy released in this way is transmitted through the far-infrared radiation method, even if the surface temperature of the heating element 1000 is less than 100°C, it is possible to heat the surface and the inside of the object to be heated equally when drying organic substances such as agricultural and marine products, thereby reducing power costs. Not only can you do it, you can also get a dry product of excellent quality.

FIG. 4 is a perspective view illustrating a state in which the third side plate and the third side heater are separated in FIG. 2, and FIG. 5 is a perspective view illustrating a coupling structure between the main heater and the shaft.

When referring to FIGS. 4 and 5 and further describing the main heater 230, the main heater 230 is formed in a state in which a pair of first concave portions 231 cut in a predetermined shape at one edge are spaced apart a predetermined distance. In addition, a second concave portion 232 cut in a semicircular shape is further provided between the pair of first concave portions 231 so that the main heater 230 can be easily assembled or disassembled.

In other words, it is not possible to assemble or disassemble the heaters on the shaft one by one at the top, but rather assemble or disassemble the desired heaters from the front part by cutting them in a semicircle.

In addition, a long rod-shaped shaft 250 is inserted into the first concave portion 231 to support a plurality of flat main heaters 230 stacked horizontally in parallel.

4 and 5 show that the two main heaters 230 are arranged side by side, but this is only an embodiment, and there may be one or three or more.

6 is a perspective view as viewed from the front as a view for explaining the internal structure of the side plate, the side heater, and the upper unit, and FIG. 7 is a perspective view as viewed from the rear as a view for explaining the internal structure of the side plate, the side heater and the upper unit.

As shown in FIGS. 6 and 7, a side heater 240 is further provided inside the side plate 210. This is to improve the drying efficiency of the object to be dried and further minimize temperature variation to obtain a high-quality dried product. Specifically, the side heater 240 includes a first side heater 241 positioned inside the first side plate 211, a second side heater 242 positioned inside the second side plate 212, and a third side plate 213. ) It consists of a third side heater 243 located inside.

Of course, although not shown in the drawing, a top heater (not shown) may be provided under the top plate 220, and similarly, a bottom heater (not shown) may be installed above the moisture receiving groove 131 of the bottom frame 130. .

Meanwhile, a cable bayer 260 for moving the power cable may be further provided on an outer surface of the second side plate 212.

Subsequently, the upper unit 300 will be described. The upper unit 300 covers or opens the lower unit 200 while moving vertically. That is, when the object to be dried is loaded or discharged into the lower unit 200, the upper unit 300 is raised to a predetermined height, and when drying, the lower unit 200 is in close contact with the floor frame 130.

Specifically, the upper unit 300 is a cylindrical chamber 310 that forms a predetermined space whose side and upper surfaces are sealed while the lower surface is open and the inside is empty so as to cover the side and upper surfaces of the lower unit 200 ). In addition, inside the cylindrical chamber 310, a fourth side plate 320 positioned perpendicularly to face the third side plate 213 of the lower unit 200 is fixed, and the first side heater 241 to the third side Like the heater 243, a front heater 330 arranged vertically is mounted inside the fourth side plate 320 so that a uniform temperature can be maintained.

In addition, so that the cylindrical chamber 310 can move up and down, one side is fixed to the outer surface of the cylindrical chamber 310 at a predetermined position on the outer surface of the cylindrical chamber 310 and the other side is supported by the vertical frame 110 ( 311) is provided. Here, the drawing shows that two transfer wheels 311 are mounted on each vertical frame 110, but this is only an example and the number can be changed as much as possible.

And in order to lift or lower the upper unit 300, a plurality of second hooks 312 coupled with the other side of the wire (not shown) connected to the first hook 125 on one side are provided outside the upper surface of the cylindrical chamber 310 It may be provided on the side.

Meanwhile, the first bracket 321 is for easily repairing or replacing the front heater 330.

Next, a method of operating a dryer including the ceramic heating element of the present invention will be described.

8 is a flowchart illustrating a method of operating a dryer including a ceramic heating element of the present invention.

First, a plurality of main heaters 230 are lifted up to the extent that they can be completely seen. That is, the step of moving the chain (not shown) connected to the second hook 312 of the chamber 310 and the first hook 125 of the second horizontal frame 120 upward using the lifting part 123 to be.

Agricultural and marine products to be dried on the top of the plurality of flat main heaters 230 stacked horizontally, for example, may be pepper. Here, it is preferable to load the agricultural and fishery products loaded in the flat main heater 230 as uniformly as possible so that uniform drying and high-quality dry products can be obtained.

Next, the upper unit 300 is moved downward. The upper unit 300 is moved downward so that the lower end of the upper unit 300 is in close contact with the groove 134 of the bottom frame 130. That is, a chain (not shown) connected to the second hook 312 of the chamber 310 and the first hook 125 of the second horizontal frame 120 is moved downward using the lifting part 123 Step.

Subsequently, power is supplied to the main heater 230 and the side heater 240 to adjust the interior of the chamber 310 to a predetermined temperature. Here, the temperature inside the chamber is 30°C to 150°C, preferably 120°C to 60°C, and more preferably 100°C to 80°C.

Simultaneously with, or before or after the temperature adjustment, the interior of the chamber 310 is adjusted to a predetermined degree of vacuum. Here, the degree of vacuum is preferably -99 kPa or less. As a method of adjusting the degree of vacuum, the air in the chamber is discharged to the outside through the valve 133 of the pipe 132 connected to the moisture receiving groove 131 of the bottom frame 130. At this time, a suction pump (not shown) is connected to one side of the pipe 132.

After a predetermined time elapses, the power supplied to the main heater 230 and the side heater 240 is cut off, and the valve 133 is opened so that the inside of the chamber 310 becomes atmospheric pressure. Of course, after adjusting the interior of the chamber 310 to atmospheric pressure, the power may be cut off, and these operations may be performed simultaneously.

Finally, after lifting the upper unit 300 upward, the dried agricultural and marine products are discharged. The method of lifting the upper unit 300 is a chain (not shown) connected to the second hook 312 of the chamber 310 and the first hook 125 of the second horizontal frame 120 as described above. It is moved upward using the lifting part 123.

Specific parts of the present invention have been described in detail above. For those of ordinary skill in the art, these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited thereby, It is obvious to those skilled in the art that various changes and modifications are possible within the scope and scope of the technical idea, and it is natural that such modifications and modifications fall within the appended claims.

100: frame
110: vertical frame
120: horizontal frame
121: first horizontal frame 122: second horizontal frame
123: lifting part 124: chain pocket
125: first hook
130: floor frame
131: water receiving groove 132: piping
133: valve 134: groove
140: leg
200: lower unit
210: side plate
211: first side plate 212: second side plate
213: third side plate
220: top plate
230: main heater
231: first concave portion 232: second concave portion
240: side heater
241: first side heater 242: second side heater
243: 3rd side heater
250: shaft
260: cable bayer
300: upper unit
310: chamber
311: transfer wheel 312: second hook
320: fourth side plate
321: first bracket
330: front heater

Claims (10)

Moving the upper unit 300 above a predetermined height;
Loading an object to be dried on top of a plurality of flat plate main heaters 230 stacked horizontally;
Moving the upper unit 300 downward so that the lower end of the upper unit 300 is in close contact with the groove 134 of the bottom frame 130;
Heating the chamber 310 to a predetermined temperature by supplying power to the main heater 230 and the side heater 240;
Discharging the air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined degree of vacuum;
Opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure after a predetermined time elapses; And
And discharging the dried object after moving the upper unit 300 above a predetermined height.
The method of claim 1,
The method of operating a dryer, characterized in that the vacuum degree is -99 kPa or less.
delete delete The method of claim 1,
A dryer operating method, characterized in that the temperature inside the chamber 310 is 120°C or less.
The method of claim 5,
Dryer operating method, characterized in that the temperature inside the chamber 310 is 60 ℃ to 120 ℃.
The method of claim 1,
After the step of discharging the air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined vacuum level, power is supplied to the main heater 230 and the side heater 240 so that the chamber 310 A method of operating a dryer, characterized in that the step of heating the internal temperature to a predetermined temperature is performed.
The method of claim 1,
The steps of discharging air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined vacuum level, and supplying power to the main heater 230 and the side heater 240 A method of operating a dryer, characterized in that the step of heating so that the temperature becomes a predetermined temperature is performed simultaneously.
The method of claim 1,
Between the step of discharging the air in the chamber 310 through the valve 133 so that the chamber 310 has a predetermined degree of vacuum, and opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure after a predetermined period of time has elapsed. The dryer operating method, characterized in that further performing the step of cooling to a predetermined temperature.
The method of claim 1,
Cooling to a predetermined temperature is further performed between opening the valve 133 so that the inside of the chamber 310 becomes atmospheric pressure, and discharging the dried object after moving the upper unit 300 above a predetermined height. Dryer operation method, characterized in that.

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