KR101826438B1 - a Thawer - Google Patents

Abstract

The present invention relates to a thawing machine, and more particularly, to a thawing machine configured to generate a low-frequency microwave, which is significantly lower than a frequency used in a conventional microwave oven, from a microwave generator and defrosting frozen food more efficiently and quickly into a substantially natural state so as to be cooked directly. According to the present invention, a thawing machine including a body (10), a defrosting chamber (20), a microwave generator (30), and an antenna (40) includes: a matching box (50); and an edge plate (60).

Description

Thawer {a Thawer}

The present invention relates to a thawing machine, and more particularly, to a thawing machine that generates a low-frequency microwave, which is significantly lower than a frequency used in a conventional microwave oven, from a microwave oscillator (SSPM) It was invented to thaw and cook immediately.

Generally, a microwave oven, which is widely used in the home, stores and closes foodstuffs, and when the operation button is pressed, a voltage is applied to the high voltage generator, and a commercial voltage applied to the high voltage generator is boosted to supply power to the magnetron The microwaves generated by the magnetron are transmitted to the cavity through a waveguide or the like.

At this time, the cooking device using a microwave is to heat the food by the frictional heat generated by vibrating the molecules constituting the food by irradiating the microwave generated from the magnetron to the food.

In recent years, various methods have been studied for solving problems such as quality, productivity, and cost during thawing at domestic and overseas sites. One of them is the most interested in thawing method using microwaves.

Conventional thawing methods up to now raise the temperature first from the surface of the food in contact with the outside air, and the heat is transferred to the inside of the frozen food by the heat conduction of the elevated temperature, and the whole thawing is performed.

However, when the microwave is used, the microwave vibrational kinetic energy is changed to 7 thermal energy in the entire portion where the microwave penetrates, so that the entire inner and outer parts of the frozen food are simultaneously heated within a short time, There is an advantage that it can be thawed.

A microwave is irradiated to the frozen food through a waveguide using a 2,450 MHz microwave generating magnetron used in a general microwave oven. To this end, a high voltage transformer for controlling the input power, an air cooling fan for cooling, and a noise filter are additionally attached .

Korea Patent Registration No. 10-0621718 (Registration date August 31, 2006) Korean Patent Publication No. 10-2008-0098468 (published on November 10, 2008)

On the other hand, using this principle, a small amount of frozen food was thawed in a microwave oven which is partially used at home.

However, in the conventional commercial microwave oven, the frequency of the microwave of 2,450 MHz is relatively high and the wavelength length is as short as 12.2 cm. Since the microwave is not developed for thawing of food, when the size of the food is large or the throughput is large, There is a problem that it is difficult to thaw and there is a problem that it is difficult to obtain a uniform thawing result.

In addition, the conventional microwave thruster has a difficulty in defrosting various products in accordance with size, type, and freezing state, because it is impossible to control not only the microwave frequency but also the phase control.

An object of the present invention is to provide a thawing machine capable of realizing uniform thawing within a short time, regardless of the type, size and processing capacity of a food.

Another object of the present invention is to provide a thawing machine capable of processing a necessary amount at a necessary point in time.

Another object of the present invention is to provide a thawing machine capable of reducing the loss of raw materials and improving the quality by minimizing the weight change due to drip during thawing, thereby enhancing the reliability and merchantability of the product.

Another object of the present invention is to provide a thawing machine capable of minimizing the discharge of polluted water and wastewater and minimizing the deterioration of thawed water.

It is another object of the present invention to provide a method and apparatus for analyzing the state and characteristics of a thawing material by using a microwave oscillator (SSPM) to detect the forward and reverse signals at the final output stage, .

According to an aspect of the present invention, there is provided a portable electronic device including a body covered with an outer cover by a cover,

A defrosting chamber 20 having a hollow shape in which the inlet is sealed by the door 1 from the inside of the body 10,

A microwave oscillator 30 accommodated in the body 10 to generate and amplify a low frequency signal and to have a forward and a reverse signal detector incorporated in a final output stage;

And an antenna 40 connected from the microwave oscillator 30 to the connector 31 and positioned inside the upper part of the defrosting chamber 20,

A matching box 50 which is seated on the upper part of the thawing chamber 20 and in which a window 52 is wound on the receiving plate 51,

And an edge plate (60) for sealing the driven window (52) of the support plate (51)

The ratio S1 of the volume V1 of the thawing chamber 20 with respect to the microwave wavelength λ generated from the microwave oscillator 30 = V1 / λ = 456,929 to 603,018,
The matching box 50 according to claim 1, wherein the height of the matching box 50 between the ceiling and the receiving plate 51 is 40 mm, the width of the window 52 pierced through the center of the receiving plate 51 is 552 mm,
The antenna 40 has a length of 187 mm, a width of 20 mm and a thickness of 1 mm and a distance of 17 mm from the ceiling of the defroster chamber 20. The shaft center C connected to the connector 31 is 147 mm on one side, Lt; RTI ID = 0.0 > mm. ≪ / RTI >

Here, the volume V1 of the defrosting chamber 20 is 630 mm in width W, 486 mm in height H, and 488 mm in depth D

Is set within a range of a maximum width (W) of 710 mm, a height (H) of 526 mm and a depth (D) of 528 mm, and a micro wavelength (?) To a width of 327 mm.

The wavelength corresponding to a frequency of 915 MHz in air is approximately 327 mm

Preferably, the defrosting effect is most optimal when the width W of the defrosting chamber 20 is 652 mm, the height H is 506 mm, and the depth D is 508 mm.

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According to the present invention, uniform thawing can be realized within a short time at any time regardless of the type and size of the food or the processing capacity, and a necessary amount can be processed at a necessary point in time.
In addition, the discharge of polluted water and wastewater can be minimized, and the deterioration of the thawing water can be minimized, thereby enhancing the reliability and merchantability of the product.
In addition, it is possible to perform the most effective thawing according to the thawing properties as a thawing machine capable of controlling the microwave frequency, phase output, and thawing temperature according to the type, size and condition of the thawing water. So that the convenience and the commerciality of the consumer can be greatly improved.

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1 is a perspective view showing a thawing machine configuration of the present invention;
2 is a longitudinal sectional view of the present invention.
3 is a side cross-sectional view of the present invention.
4 is an exploded perspective view of an edge plate which is seated in a defrosting chamber and a facing box;
5 is a plan view of a matching box;
6 is an enlarged cross-sectional view of the main part of the framing box;
7 is an enlarged view of an installation state of the antenna.
8 is a plan view of the antenna.

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

First, the microwave generated by the microwave generator 30 of the present invention is set to a low frequency relative to the conventional microwave frequency of 915 MHz.

The 915 MHz microwave has a wavelength of 32.7 to 33 cm in the air and has a longer wavelength than the frequency (12.2 cm) used in a microwave oven.

Therefore, even when the material is thick in the process of defrosting the frozen food, it is revealed that the wave is transmitted deeply and the defrosting effect can be greatly improved.

The body 10 forms a frame of the defrosting machine, and various structures and components to be described later are fixedly installed, and then the cover 10 is wrapped around the cover 11 and closed.

The thawing chamber 20 is fixed in position on the inner side of the body 10 in the form of a hollow hollow container which is forwardly folded. The front entrance of the thawing chamber 20 is opened and closed by the door 1, do.

A microwave oscillator 30 and various devices for generating microwaves such as a power supply unit and a control circuit are incorporated in the upper space of the defrosting chamber 20. The microwave oscillator 30 is connected to the antenna 40 Are electrically connected to each other.

The antenna 40 is a plate-shaped metal material having a predetermined thickness and is selected from copper, aluminum, or stainless steel. The microwave output energy generated from the microwave oscillator 30 toward the inside of the defroster chamber 20 is radiated .

The microwave oscillator 30 is installed in the system as a solid state power modulator (SSPM) to generate and amplify RF signal power up to a standard power of 500 W and supply it to the antenna 40.

The SSPM is internally generating a signal of 20MHz in the center frequency 915MHz, amplifying 500W, adjusting the output level and phase, and the forward and reverse signal detector is incorporated in the final output terminal 40, It is already known to support the function of selecting the frequency.

In addition, a forward and reverse detector (Reflective Detector) is built in to perform the power detection function to monitor the size of the final forward output power and the backward reflected power of the amplifier.

Accordingly, when the microwave oscillator 30 is driven by the power supply unit and the control circuit, microwaves are radiated from the antenna 40 connected to the connector 31 into the defrosting chamber 20 to defrost the frozen food material will be.

A matching box 50 is provided inside the upper part of the defrosting chamber 20.

The matching box 50 is fixed to the upper portion of the defrosting chamber 20 and a window 52 of a predetermined size is placed on the lower portion of the defrosting chamber 20 and the edged window 52 is sealed by the edge plate 60.

 The edge plate 60 has a plate shape of a predetermined thickness and has a function of passing microwaves and preventing moisture or various foreign substances from entering the mounting position of the antenna 40. The edge plate 60 is made of a synthetic resin material such as PE or PP, Or the like.

The microwave is transmitted to the inside of the defroster chamber 20 by the edge plate 60 sealing the window 52 of the matching box 50 but the moisture generated in the defrosting process is blocked, Thereby maximizing the output efficiency of the microwave.

The matching box 50 is firmly fixed to the upper part of the defroster chamber 20 by a screw and the edge plate 60 which is seated on the support plate 51 of the matching box 50 is also fixed Respectively.

Here, the shape and size ratio of the antenna 40, the matching box 50 and the defrosting chamber 20, and the volume of the internal space play a very important role depending on the wavelength.

That is, it is preferable that the ratio S1 of the volume V1 of the defrosting chamber 20 to the microwave wavelength λ generated from the microwave oscillator 30 = V1 / λ = 456,929 to 603,018.

The volume V1 of the thawing chamber 20 is set within the range of the width W between 630 mm and 710 mm, the height H between 486 mm and 526 mm and the depth D between 488 mm and 528 mm And the micro wavelength (?) = 327 mm.

According to the test, it was found that the most effective defrosting effect was obtained when the width W of the defrosting chamber 20 was 652 mm, the height H was 506 mm, and the depth D was 508 mm.

Therefore, it can be seen that the ratio S1 of the most preferable volume V1 of the thawing chamber 20 = V1 /? = 167,595,296 / 327 (915 MHz) = 512,524.

The height of the matching box 50 between the ceiling surface of the defroster chamber 20 and the support plate 51 is 40 mm and the width of the window 52 pierced through the center of the support plate 51 is 552 mm and the depth is 408 mm And the distance from the ceiling of the defroster chamber 20 is 17 mm. The shaft center C connected to the connector 31 is set to be one side 147 Mm and the other side 40 mm is eccentrically formed is the optimum size for the defrosting effect for 915 MHz microwave.

On the other hand, the inner bottom of the defroster chamber 20 is provided with a support plate for rotating the material so that the defroster plate can be evenly defrosted, and the rotating means.

According to the thawing machine of the present invention, since the structure is relatively simplified using a microwave oscillator (SSPM) and the forward and reverse signal detectors are available at the final output stage, the state and characteristics of the thawing material to be thawed are directly analyzed and applied, You can choose the frequency.

In addition, the surface temperature is measured and analyzed as the thawing progresses so that the temperature of the thawed food material becomes uniform and thawed in the natural state immediately before the freezing, and the thawing temperature is continuously controlled to the determined thawing temperature.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

The present invention applies to thawing technology. In particular, the present invention can be applied not only to a thawing machine using a microwave, which enables a frozen food to be thawed almost evenly in a short time, and can be used for applications such as a drying system or a thawing drying hybrid system.

10 - Body 11 - Door
20 - Thawing room 30 - Bike wave oscillator
40 - Antenna 50 - Machining box
51 - Window 60 - Edge Plate

Claims (4)

A body 10 to which the outside is wrapped by the covers 11,
A defrosting chamber 20 having a hollow shape in which the inlet is sealed by the door 1 from the inside of the body 10,
A microwave oscillator 30 accommodated in the body 10 to generate and amplify a low frequency signal and to have a forward and a reverse signal detector incorporated in a final output stage;
And an antenna 40 connected from the microwave oscillator 30 to the connector 31 and positioned inside the upper part of the defrosting chamber 20,
A matching box 50 which is seated on the upper part of the thawing chamber 20 and in which a window 52 is wound on the receiving plate 51,
And an edge plate (60) for sealing the driven window (52) of the support plate (51)
The ratio S1 of the volume V1 of the thawing chamber 20 with respect to the microwave wavelength λ generated from the microwave oscillator 30 = V1 / λ = 456,929 to 603,018,
In the matching box 50, the height between the ceiling and the support plate 51 is 40 mm, the width of the window 52 pierced through the center of the support plate 51 is 552 mm and the depth is 408 mm,
The antenna 40 has a length of 187 mm, a width of 20 mm and a thickness of 1 mm and a distance of 17 mm from the ceiling of the defroster chamber 20. The shaft center C connected to the connector 31 is 147 mm on one side, Lt; RTI ID = 0.0 > mm < / RTI >
The method according to claim 1, wherein the volume (V1) of the defrosting chamber (20) is set in a range between 630 mm and 710 mm in width, between 486 mm and 526 mm in height, and between 488 mm and 528 mm in depth, A center frequency of 915 MHz, and a wavelength (lambda) to 327 mm.
delete The defroster according to claim 2, wherein the defrost chamber (20) has a width of 652 mm, a height of 506 mm and a depth of 508 mm.

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