KR20180093289A - Drying Apparatus - Google Patents

Abstract

A drying device is disclosed. The drying apparatus includes a main body forming a cavity for drying an object, a plurality of waveguides having different lengths, arranged in a predetermined pattern on one side of the main body, for radiating microwaves to the object, a plurality of waveguides connected to each of the plurality of waveguides, And a plurality of power sources connected to each of the plurality of magnetrons to supply a high voltage to each of the plurality of magnetrons for generating microwaves, and a controller for controlling the plurality of power sources.

Description

[0001] Drying Apparatus [0002]

The present disclosure relates to a drying apparatus, and more particularly, to a drying apparatus for uniformly drying an object to be dried.

BACKGROUND ART [0002] Drying apparatuses are generally known to the public as apparatuses for heating an object to be dried at a high frequency. Such a drying apparatus utilizes the fact that molecules in the high-frequency electric field are vigorously vibrated to generate heat, so that it can be heated evenly in a short period of time. Typically, there is a microwave microwave oven, which cooks food using a microwave generated from a magnetron. At this time, the microwave is radiated to the food through the wave guide.

However, in a conventional drying apparatus, a structure of a single waveguide is used. In such a structure, a drift distribution varies due to a large difference in field distribution in a specific region. In order to solve such a problem, Thereby making the temperature distribution uniform.

On the other hand, in the case of a dryer using multiple waveguides of the large-capacity conveyor belt type, it is difficult to form a uniform temperature distribution because it is difficult to use a rotary plate. In such a case, impedance mismatching for multiple waveguides is large, there is a problem that the microwave source is damaged by reflected power.

Accordingly, there has been a demand for development of a technique capable of uniformly drying an object to be dried without a special auxiliary device.

SUMMARY OF THE INVENTION The present disclosure is in accordance with the above described needs, and it is an object of the present disclosure to provide a drying apparatus that forms a uniform temperature distribution through structural modification of multiple waveguides.

According to an aspect of the present invention, there is provided a drying apparatus comprising: a main body forming a cavity for drying an object, the main body having different lengths and arranged in a predetermined pattern on one side of the main body, A plurality of magnetrons connected to each of the plurality of waveguides and generating the microwaves and transmitting the generated microwaves to each of the plurality of waveguides; a plurality of magnets connected to each of the plurality of magnetrons, And a controller for controlling the plurality of power sources.

The arrangement of each of the plurality of waveguides is arranged at a vertex position of a virtual predetermined polygon according to the number of the plurality of waveguides, and the shortest waveguide and the longest waveguide are arranged to be farthest from the plurality of waveguide arrangement positions .

The arrangement of each of the plurality of waveguides may be arranged at a vertex position of a virtual preset polygon according to the number of the plurality of waveguides, and the shortest waveguide and the longest waveguide may be arranged not to be adjacent among the plurality of waveguide placement positions have.

On the other hand, the interval between the plurality of waveguides may be an integral multiple of? / 4 based on the microwave wavelength?.

The length difference between the plurality of waveguides may be an integral multiple of? / 4 based on the microwave wavelength?.

In addition, the input terminals of each of the plurality of waveguides may be disposed toward a direction in which the waveguides are switched to a predetermined angle.

According to the various embodiments described above, the drying apparatus can uniformly dry the laundry according to the length and the arrangement form of the multiple waveguides.

1 is a perspective view of a drying apparatus according to an embodiment of the present disclosure;
2 is a block diagram of a drying apparatus according to one embodiment of the present disclosure;
3 is a diagram illustrating the placement of multiple waveguides in accordance with one embodiment of the present disclosure;
Figure 4 is a diagram illustrating multiple waveguide placement types.
Figure 5 is a plot of electric field and thermal distribution when supplying the same power to the multiple waveguide batch type of Figure 4;
6 is a diagram illustrating electric fields and thermal distribution when power control is performed for the multiple waveguide arrangement type of FIG.

Various embodiments will now be described in detail with reference to the accompanying drawings. The embodiments described herein can be variously modified. Specific embodiments are described in the drawings and may be described in detail in the detailed description. It should be understood, however, that the specific embodiments disclosed in the accompanying drawings are intended only to facilitate understanding of various embodiments. Accordingly, it is to be understood that the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, but includes all equivalents or alternatives falling within the spirit and scope of the invention.

 Terms including ordinals, such as first, second, etc., may be used to describe various elements, but such elements are not limited to the above terms. The above terms are used only for the purpose of distinguishing one component from another.

In this specification, the terms "comprises" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In the meantime, "module" or "part" for components used in the present specification performs at least one function or operation. Also, "module" or "part" may perform functions or operations by hardware, software, or a combination of hardware and software. Also, a plurality of "modules" or a plurality of "parts ", other than a" module "or" part ", to be performed in a specific hardware or performed in at least one processor may be integrated into at least one module. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, in the description of the present invention, when it is judged that the detailed description of known functions or constructions related thereto may unnecessarily obscure the gist of the present invention, the detailed description thereof will be abbreviated or omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a drying apparatus according to an embodiment of the present disclosure;

1, the drying apparatus 100 of the present disclosure includes a main body 10, a cooking window 20, a door 30, and an operation panel 40. As shown in Fig. For example, the drying apparatus 100 may include a microwave oven.

Inside the main body 10, a cavity 50 having an accommodation space of a predetermined size is provided so that an object is accommodated and dried by microwaves. A cooking window 20 is attached to a front portion of the main body 10 and a door 30 is openably coupled to the main body 10. An operation panel 40 is coupled to one side of a front surface of the main body 10. Here, the operation panel 40 may correspond to a control unit or a user interface unit for controlling the drying apparatus 100. Therefore, it may be called a control panel.

A plurality of magnetrons (not shown) for generating microwaves are provided on the outer surface of the cavity 50, and microwaves generated in the magnetron are guided to the inside of the cavity 50 A waveguide (not shown) is coupled. In addition, a transformer (not shown) for boosting the power input to the apparatus to a high pressure and supplying the power to the plurality of magnetrons is provided on the lower side of the magnetron, and a cooling fan (not shown) for cooling the magnetron is installed around the magnetron do.

According to the embodiment of the present disclosure, since the drying apparatus 100 includes the multiple waveguides radiating the microwaves into the cavity 50, it is not necessary to provide the tuner in the cavity as in the prior art, The configuration of the motor can be omitted. Thus, the cost of the drying apparatus 100 can be saved.

The multiple waveguide 110 according to the embodiment of the present disclosure preferably has a bilaterally symmetrical structure. So that a uniform temperature distribution can be achieved in the cavity 50. For example, it may have a symmetrical structure with respect to the incident surface on which the object is placed. For this purpose, the individual waveguides, that is, the individual waveguides which are independent of the other waveguides and which are in the form of an island, that is, an island, are formed symmetrically as a whole. For example, rectangular, hexagonal, and octagonal shapes may be formed.

Since the main body 10 according to the embodiment of the present disclosure does not have a turntable for rotating the object to be dried, the lower body on which the food is placed has a design for guiding the space in which the food is placed, or a separate structure is formed It will be possible.

2 is a block diagram of a drying apparatus according to one embodiment of the present disclosure;

Referring to FIG. 2, the drying apparatus 100 includes a main body 10, a wave guide 110, a magnetron 120, a power source 130, and a controller 140. The body 10 forms a cavity in which the object is dried. For example, the object may be food, garbage, an object including moisture, and the like. The object is placed in the cavity of the body 10 and can be dried by microwaves emitted from the waveguide 110.

The waveguide 110 is provided on one side of the main body. The waveguide 110 emits a microwave to an object located in the cavity by radiating the microwave into the cavity. A plurality of waveguides 110 may exist. That is, as shown in FIG. 2, the drying apparatus 100 may include multiple waveguides 110-1 and 110-n. The multiple waveguides 110-1 and 110-n are arranged in a predetermined pattern and have different lengths. On the other hand, the number of waveguides arranged based on the size of the cavity, the output voltage or the like can be determined. The shape and arrangement of the specific waveguide 110 will be described later.

The magnetron 120 is provided on one side of the main body. The magnetron 120 generates a microwave and transmits it to the waveguide 110. One magnetron 120 can transmit microwaves to one waveguide 110. Accordingly, when a plurality of waveguides 110 are disposed, the plurality of magnetrons 120 may be included in the drying apparatus 100 corresponding to the number of the waveguides 110. That is, as shown in FIG. 2, the drying apparatus 100 may include a plurality of magnetrons 120-1 and 120-n.

The power supply unit 130 may transmit a high voltage to the magnetron 120 for generating microwaves. One power supply unit 130 can deliver a high voltage to one magnetron 120. Accordingly, when a plurality of magnetrons 120 are included, the plurality of power sources 130 may be included in the drying apparatus 100 corresponding to the number of the magnetrons 120. That is, as shown in FIG. 2, the drying apparatus 100 may include a plurality of power sources 130-1 and 130-n.

One power supply unit 130-1 can deliver a high voltage for generating microwaves to one magnetron 120-1. One magnetron 120-1 can transmit generated microwaves to one waveguide 110-1. One waveguide 110-1 can radiate microwaves into the cavity. In the above-described manner, the plurality of power supply units 130 can transmit a high voltage for generating microwaves to the plurality of magnetrons 120, respectively. The plurality of magnetrons 120 can transmit the generated microwaves to the multiple waveguide 110, respectively. The plurality of waveguides 110 can radiate the generated microwaves into the cavity, respectively.

The control unit 140 controls the power supply unit 130. When the drying apparatus 100 includes a plurality of power units 130, the controller 140 controls the plurality of power units 130-1 and 130-n simultaneously. Meanwhile, the control unit 140 may sequentially control the plurality of power units 130-1 and 130-n.

The length and arrangement of each waveguide are described below.

3 is a diagram illustrating the placement of multiple waveguides in accordance with one embodiment of the present disclosure;

Referring to FIG. 3, the multiple waveguides 110-1, 110-2, 110-3, and 110-4 are disposed on one side of the main body 10. The multiple waveguides 110-1, 110-2, 110-3, and 110-4 are arranged at the vertex positions of the virtual rectangles. That is, the multiple waveguides may be arranged at vertex positions of predetermined polygons according to the number of waveguides. As shown in FIG. 3, when the drying apparatus 100 includes four multiple waveguides 110-1, 110-2, 110-3, and 110-4, a virtual quadrangle can be drawn. The multiple waveguides 110-1, 110-2, 110-3, and 110-4 may be disposed at the vertex positions of the virtual rectangles.

Each of the multiple waveguides 110-1, 110-2, 110-3, and 110-4 includes input terminals 111-1, 111-2, 111-3, and 111-4 receiving microwaves from the magnetron. Each of the input terminals 111-1, 111-2, 111-3, and 111-4 may be disposed in a direction that is switched to a predetermined angle. For example, the first input terminal 111-1 of the first waveguide 110-1 may be disposed toward the left. The second input terminal 111-2 of the second waveguide 110-2 may be arranged to be rotated 90 degrees counterclockwise with respect to the direction in which the first input terminal is disposed. The third input terminal 111-3 of the third waveguide 110-3 may be arranged to be shifted by 90 degrees counterclockwise with respect to the direction in which the second input terminal is disposed and the fourth input waveguide 110-4 May be arranged to be shifted by 90 degrees counterclockwise with respect to the direction in which the third input terminal is disposed.

The interval between the plurality of waveguides may be an integral multiple of? / 4 based on the microwave wavelength?. For example, the frequency of a microwave used in a microwave oven is 2.5 GHz. Therefore, the length of the wavelength of the microwave can be obtained by the formula of c = f * lambda and is 120 mm. Accordingly, the plurality of waveguides can be arranged at intervals of 30 mm or 60 mm, which is an integral multiple of? / 4 of the wavelength of the microwave.

In the following, a plurality of waveguide arrangements according to the waveguide length are described.

Figure 4 is a diagram illustrating multiple waveguide placement types.

Referring to FIG. 4 (a), a plurality of waveguides 61, 62, 63, 64 having the same length are arranged. Referring to FIG. 4 (b) A plurality of waveguides 81, 82, 83, and 84 are arranged in accordance with a preset reference, as shown in FIG. 4 (c) Are shown.

Referring to FIG. 4 (a), the lengths of the first waveguide 61 to the fourth waveguide 64 are all the same. For example, the lengths of the first waveguide 61 to the fourth waveguide 64 in FIG. 4A may all be 172 mm. The above-described specific length is one embodiment, and the length of the waveguide can be set variously. Since the lengths of the first waveguide 61 to the fourth waveguide 64 in FIG. 4A are all the same, the phase difference of the microwave emitted into the cavity through each waveguide is 0 degrees and the maximum phase difference is 0 degrees.

Referring to FIG. 4 (b), the lengths of the second waveguide 72 to the fourth waveguide 74 are sequentially increased by? / 4 with respect to the length of the first waveguide 71. For example, if the frequency of the microwave is 2.5 GHz,? / 4 is 30 mm. If the length of the first waveguide 71 in FIG. 4 (b) is 142 mm, the length of the second waveguide 72 is 172 mm, the length of the third waveguide 73 is 202 mm, The length may be 232 mm. 4 (b), the phase difference of the microwave emitted through the adjacent waveguide is as follows. The phase difference between the microwave emitted through the adjacent waveguide and the microwave emitted through the second waveguide 72 is 90 degrees, the phase difference of the microwave emitted through the third waveguide 73 is 90 degrees, The emitted microwaves have a phase difference of 270 degrees and a maximum phase difference of 270 degrees.

Referring to FIG. 4 (c), a plurality of waveguides 81, 82, 83, and 84 are disposed according to predetermined criteria. That is, the shortest waveguide and the longest waveguide can be arranged to be farthest from the plurality of waveguide placement positions. Alternatively, the shortest waveguide and the longest waveguide may be arranged not to be adjacent among the plurality of waveguide placement positions. On the other hand, the length of the first waveguide 81 to the length of the fourth waveguide 84 in FIG. 4 (c) are different from each other, and the difference in length between the waveguides may be an integral multiple of? / 4.

For example, when the length of the first waveguide 81 in FIG. 4 (c) is 142 mm, the length of the second waveguide 82 is 172 mm, the length of the third waveguide 83 is 232 mm, ) May be 202 mm. In comparison with FIG. 4 (b), the positions of the third waveguide 73 and the fourth waveguide 74 in FIG. 4 (b) are the same as those in the switched form. Therefore, in the case of FIG. 4 (c), the phase difference of the microwave emitted through the adjacent waveguide is as follows. The phase difference between the microwave emitted through the adjacent waveguide and the microwave emitted through the second waveguide 82 is 90 degrees and the phase difference of the microwave emitted through the third waveguide 83 is 180 degrees. The phase difference of the emitted microwave is 90 degrees, and the maximum phase difference is 180 degrees.

The results of electric field and thermal distribution analysis according to each waveguide arrangement type shown in FIG. 4 will be described below.

Figure 5 is a plot of electric field and thermal distribution when supplying the same power to the multiple waveguide batch type of Figure 4;

FIG. 5 shows a result of supplying 250 W power to each of the first to fourth waveguides for a total of 720 seconds to supply power. 5A is a test result relating to the layout of the waveguide shown in FIG. 4A, FIG. 5B is a test result concerning the layout of the waveguide shown in FIG. 4B, (c) is a test result relating to the layout of the waveguide shown in Fig. 4 (c).

As shown in Fig. 5, the arrangement of the waveguide shown in Fig. 4 (c) has the smallest difference between the minimum temperature and the maximum temperature. That is, the arrangement of the waveguides shown in Fig. 4 (c) exhibits the most uniform temperature distribution.

6 is a diagram illustrating electric fields and thermal distribution when power control is performed for the multiple waveguide arrangement type of FIG.

FIG. 6 shows a test result in which power is supplied to the first to fourth waveguides for 180 seconds in total for 720 seconds. 6A is a test result relating to the layout of the waveguide shown in Fig. 4A, Fig. 6B is a test result concerning the layout of the waveguide shown in Fig. 4B, (c) is a test result relating to the layout of the waveguide shown in Fig. 4 (c).

As shown in Fig. 6, the arrangement of the waveguide shown in Fig. 4 (c) has the smallest difference between the minimum temperature and the maximum temperature. That is, the arrangement of the waveguides shown in Fig. 4 (c) exhibits the most uniform temperature distribution.

Therefore, if a plurality of waveguides of different lengths are arranged in a predetermined pattern based on the arrangement form and the experimental results of Figs. 4 to 6, uniform microwaves can be emitted in the cavity, and the dried object can be uniformly dried.

100: drying apparatus 10:
110: waveguide 120: magnetron
130: power supply unit 140:

Claims (6)

A body defining a cavity for drying the object;
A plurality of waveguides having different lengths and arranged in a predetermined pattern on one side of the main body and radiating a microwave to the object;
A plurality of magnetrons connected to each of the plurality of waveguides, for generating the microwaves and transmitting the generated microwaves to the plurality of waveguides;
A plurality of power sources connected to the plurality of magnetrons and supplying a high voltage to each of the plurality of magnetrons for generating the microns; And
And a controller for controlling the plurality of power sources. The method according to claim 1,
The arrangement of each of the plurality of waveguides,
And the shortest waveguide and the longest waveguide are arranged to be farthest from the plurality of waveguide placement positions. The method according to claim 1,
The arrangement of each of the plurality of waveguides,
And the shortest waveguide and the longest waveguide are disposed so as not to be adjacent to each other among the plurality of waveguide placement positions. The method according to claim 2 or 3,
Wherein the interval between the plurality of waveguides is set such that,
/ 4, based on the microwave wavelength (?). The method according to claim 1,
Wherein the length difference between the plurality of waveguides is a length
/ 4, based on the microwave wavelength (?). The method according to claim 1,
The input terminal of each of the plurality of waveguides includes:
And is disposed toward a direction that is switched to a predetermined angle.

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