TECHNICAL FIELD
The present subject matter relates in the field of food processing technology in particular refrigeration industry regarding various kinds of system of food preserving technology using plasma state of matter of the ionised air.
BACKGROUND OF THE INVENTION
[0001] From the beginning of mankind, it has always been a continuous process to make sure that humankind can always make preservation of food storage perfect. In this regard from the very beginning, we have tried to improvise various methods to store the food in such an environment so that it can be preserved for longer period of times. It has been one of the methods to keep the food in a very low temperature above freezing zone somewhere in the temperature range of 0 to 4°C so that the food can be preserved for longer period of times. It is to be noted, most of the bacteria and fungus is normally inactive in this temperature range. But, slowly by mutation, over the time, the bacteria and fungus have actually evolved in such a way so that, these bacteria and fungus can still have a ability to regenerate itself in those particular low temperatures. For example, it can be seen, bacterias such as Salmonella and several type of protozoas can still generate in these particular low temperature range & it keeps on taking resources from the food particles which are stored in the low temperature zone and thus causing the foods to decompose. So, it can often be seen, while storing foods in the refrigerator, after several days, in many

of the circumstances, it can be seen that the food decomposes in quality and thus causing the food to perish & being harmful for human consumption.
[0002] In order to reduce such decomposition rate, one of the methods that has been improvised in this particular invention, to generate plasma from the surrounding air, so that, the plasma can destroy those particular type of bacterias, fungus and protozoas which still can regenerate in low temperature range, so that, the food can be preserved for longer period of times. One of the way to achieve such plasma state of air is that to disperse ultraviolet rays into the air confined in the closed environment of the refrigerator, so the oxygen contained of the inside air can breakdown at molecular level, creating molecules of ozone, which is a plasma state of matter of the oxygen components, and the plasma ozone , in my invention has ability to kill the bacteria's 98% more effectively than normal refrigerators, thus it can keep the food fresh for much longer period of times and also to reduce the bacterial growth in the refrigerator up to substantial minimum level. So, in many of the circumstances, it always reduces the risk of contamination of the food that is consumed by human beings after keeping it in refrigerator for the longer period of times.

Objectives of the Invention
[0003] The primary objective of this particular invention is to reduce the decomposition rate of the food that is stored in the refrigerator, by the way of using ultraviolet lights and creating plasma in the air which can kill the bacteria that is present in the food particles.
[0004] It is also one of the objectives, to make sure, that the radiation level of the ultraviolet lights is kept at certain level, so that, it doesn't cause any kind of damage to the molecular structure of the various food particles, minerals in the particular refrigerator.
[0005] We also know, as ultraviolet light can cause severe damage to the human skin, a proper mechanism has been required to make sure that, no way this radiation level reaches such a level that it can cause severe burn to the human skin, when foods are taken out of the refrigerator.
[0006] One of the main features of this particular invention has also been to make sure that the plasma level of air in the refrigerator has uniform density, so it has been also an objective to make sure that the ultraviolet light is thrown into the air in such a way, so that an optimum level of plasma state can be reached in that particular closed-gated environment, and thus it can have the maximum efficiency to kill the bacteria fungus is into the refrigerator.

BRIEF DESCRIPTION OF THE DRAWINGS
[0007] The detailed description is given with reference to the accompanying figures. The same numbers are used throughout the drawings to reference features and components.
[0008] Fig. 1 illustrates a front view of the refrigerator with Ultraviolet Ray modules & it's components.
DETAILED DESCRIPTION
[0009] Various features and use-cases of the present invention here will be discernible from the following further description thereof, set out hereunder. Further, in the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the Figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein.
[00010] Fig. For this particular invention, one of the main objectives has
been to determine the amount of radiation which shall be required in a 200 L close

gated system of the refrigerator. In this regard after many of the experiments conducted in the lab, we have achieved to come to a data determining at a particular optimum level of UV radiation which is sufficient to kill the bacteria, fungus in foods in that particular system to highest possible level, in this regard, we have come to an optimum value of 7.5 mW/m2 of UV radiation level which is required to be achieved by 17 (UV1 to UV 17) compact ultraviolet LED lamps of 4.5 W/cm2 (7).
[00011] After many experiments which has been conducted, we have come
to this particular conclusion that the 17 compact LEDs has to be turned on at a stretch of 20 minutes in order to achieve the optimum level of plasma state of air into that particular closed-gated system to kill bacteria & fungus in the air in the refrigerator. Once this particular state of plasma state of air is achieved in that particular system, it is not anymore required to keep those LED lamps to be turned on. So, it is to be shut down by an automatic microcontroller system which is described afterwards in this particular application. It is to be noted that there is not much of natural decay of this plasma state in this closed-gated system thus it can be effective for at least four days period of time against any kind of microbial growth in that particular closed-gated refrigerator. At any point of time if the refrigerater is opened again, once refrigerator is closed, this particular ultraviolet LED modules can again be switched on and again in the continuous stretch of 20 minute, if it is turned on, it can it can be achieved the optimum level of plasma state in the air thus keeping the foods afresh and can get rid of any kind of smell the refrigerator because of biproducts produced by various types of bacterias.

[00012] It is to be noted that Arduino Uno (ATmega328P) based
microcontroller module (5) is actually programmed in order to achieve this intermittent switching on-off system of the ultraviolet LED modules and also provide automatic shutdown of the LED modules in case the refrigerator is opened during the period which the LED modules are actually switched on in order to not have any kind of effect like skin burn on the human being because of prolonged exposure to UV rays radiated from those LED lamps.
[00013] The It is to be noted that a subsonic distance sensor (11) is put near
the opening section of the refrigerator, which is connected to the microcontroller system mentioned in the para 2, in order to make sure the ultraviolet ray LED modules are switched off if anyone opens up the door of the refrigerator. It is also connected to a specially designed analog circuit (6) which provides optimal level of voltage to the sensor and inputs to the microcontroller in order to achieve the distance sensing mechanism. The whole system is connected to a fuse of specific rating (8) in order to reduce any scenario of over-voltage and over-current drawing into the system in order to protect various valuable components of the system and also preventing health-related hazards.
[00014] There is a LED counter system (9) in the front of the display of the
refrigerator which can notify as timer as to how much time ultraviolet light LED modules are switched on, thus also providing a hint that the refrigerator should not normally be opened up during that period of time. Even, in case, it is required to be opened when the ultraviolet light LED modules are switched on, this counter sends a feedback signal to the microcontroller module to keep that counter timer into the

memory so once the refrigerator is closed, it reduces the timer value of 20 minutes by 25% and accordingly there is a particular program that keeps on running in the background which calculates the amount of time the refrigerator has been opened up and accordingly it resets the timer and so that the time of switching on-off the ultraviolet LED modules are revised after closing of the refrigerator doors. There is a Neon light (10) that is connected with the microcontroller and the subsonic distances sensor, which turns on as the refrigerator is opened. This whole system receives power for from normal 220 V 50Hz system (3) which is afterward converted to an automatic AC/DC converter (4) specially designed for this system which provides the required power to all the elements mentioned in this application.
[000151 While preferred embodiments of the present subject matter have
been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present subject matter.
[00016] While considerable emphasis has been placed herein on the
particular features of this invention, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the invention. These and other modifications in the nature of the invention or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be

distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim:

1. A smart plasma state of matter-based refrigerator with:
A. The system of array of UV ray modules (UV1 to UV 17) (7) in order to
achieve optimum plasma generation for the defense mechanism against bacterial
growth;
B. Switching on mechanism (11), (9), (6) of the UV ray modules & the
protective mechanism in this matter.
2. machine level programming of the microcontroller (5) regarding:
A. regarding switching on-off mechanism of the UV ray modules (11):
B. Auto cut system of the UV ray modules (11):
C. counter-based program reset mechanism of the UV ray modules (11).