KR20000043513A - Ozone generator for refrigerator - Google Patents

Abstract

PURPOSE: An ozone generator for a refrigerator is provided to sterilize various kinds of bacteria and to deodorize a smell by generating ozone by a corona discharge inside the refrigerator. CONSTITUTION: An ozone generator for a refrigerator is equipped with: a circuit unit of high voltage(110) to generate a high voltage by boosting and exhausting an inputted power; a supplying unit of power(120) to supply one power among a DC power rectified an AC power and a battery power into the circuit unit of high voltage; a discharging electrode(130) fed a negative voltage of high voltage; and a lattice-shaped ground electrode(140) separated from the discharging electrode at a certain distance and fed a positive voltage of high voltage. A negative corona discharge is generated in the discharging electrode, and a current is generated by facing ozone generated between the discharging electrode and the ground electrode to the ground electrode. The generated amount of ozone is controlled when a cycle fed/shielded the high voltage in the discharging and the ground electrodes is controlled.

Description

Ozone Generator for Refrigerator

The present invention relates to an ozone generator for a refrigerator, and more particularly, to generate ozone (O ₃ ) by corona discharge in a refrigerator to sterilize various bacteria in the refrigerator and deodorize odors. .

As is well known, the refrigerator allows temperature and humidity conditions to be adjusted by the circulation of the refrigerant so that ripening proceeds slowly while keeping various foods at a low temperature.

Such a refrigerator is hermetically sealed in consideration of energy efficiency, and due to this property, the odor generated from various stored foods always remains in the refrigerator and is provided as a odor to the user.

Therefore, conventionally, in order to remove odor, the deodorant which has the structure shown in FIG. 1 was installed in the predetermined location in the refrigerator.

The deodorant is supported by manganese dioxide (MnO ₂ ) catalysts, copper oxide (CuO) catalysts, and artificial enzyme catalysts in a certain ratio, and has a honeycomb shape in order to increase the working area.

Then, the chemical chemistry between various odor components included in food, that is, trimethylamine (CH ₄ S) and methane ethanol (CH ₆ N) and manganese dioxide (MnO ₂ ) / copper oxide (CuO) / artificial enzyme catalyst supported on activated carbon Catalytic reaction takes place.

Accordingly, the manganese dioxide catalyst removes nitrogen (N) -based odor components, the copper oxide catalyst removes sulfur (S) -based odor components, and the artificial enzyme catalyst exhibits oxidative decomposition and antibacterial effects.

That is, when various odor components and oxygen (O ₂ ) are adsorbed and diffused on the surface of activated carbon, the odor component is dissociated in the atomic state by the catalyst, and the dissociated odor component reacts with the oxygen atom on the surface of the catalyst to generate water (H ₂ O). And carbon dioxide (CO ₂ ).

Therefore, the final products of water and carbon dioxide are produced by the catalytic reaction, and the odor causing components are extinguished to deodorize the noxious odor in the oven.

However, when the deodorizing agent is deodorizing efficiency is reduced, the user has to replace it, especially when the end product of water and carbon dioxide, which is the final product of the catalysis, do not diffuse away from the surface of the deodorizing agent and saturate on the surface of the deodorizing agent. Are frequent and have very short replacement cycles.

In addition, since the refrigerator maintains low temperature and high humidity conditions, the harmful microorganisms that are resistant to low temperatures have a side effect of providing parasitic space. Especially, since the temperature changes frequently according to the opening and closing of the door, the humidity condition is more favorable for bacteria or fungi. Provide a condition.

By the way, the deodorant as described above can be expected to some extent the deodorant function of the odor, but the function of sterilizing bacteria can not be expected at all, there was a problem that can not be a fundamental solution.

Therefore, in recent years, in order to solve the above problems, ozone generator for refrigerators which sterilize various bacteria and deodorize by using ozone (O ₃ ) has been developed.

Figure 2 is a block diagram of a ozone generator for a refrigerator performing a deodorizing and sterilizing function according to the prior art.

The ozone generating apparatus shown in the drawing is forcibly sucked air in the odor containing the odor component and various bacteria using the fan motor (1) to guide the ozone generator (2) having a plate-shaped electrode, When the high voltage induced in 3) is applied between two electrodes of the ozone generator 2, discharge occurs along the surface of the insulator between the electrodes, thereby generating ozone.

Then, while the inhaled odor component is decomposed and removed by the strong oxidizing power of ozone, various bacteria are sterilized, and the strong concentration of ozone is distilled through the catalyst 4 and replaced and discharged by the low concentration of ozone.

As described above, the ozone generator according to the prior art, ozone is generated by the surface discharge (surface discharge) of the ozone generator, it can be seen that the catalyst plays a role of lowering the concentration of ozone.

Therefore, since the air flow must be formed so that the air in the air is sucked, the volume occupied by the apparatus is very large and noise is generated by using a forced blower such as a fan motor.

In addition, there is a problem in that the catalyst must be replaced at regular intervals because the odor component and the ozone component are adsorbed and saturated on the surface of the catalyst after a predetermined time due to the use of a concentration diluent such as a catalyst because the ozone concentration control function does not exist.

Therefore, the present invention has been proposed to solve the above problems of the prior art, by applying a high voltage negative voltage to the needle-shaped discharge electrode and applying a positive voltage to the grid-shaped ground electrode. By providing an ozone generating device for a refrigerator which causes a corona discharge of and causes ozone to be generated by ionizing air between the discharge electrode and the ground electrode,

First: The electrons in the discharge electrode move to the ground electrode to naturally create airflow, so as not to use a forced blower such as a fan motor to reduce the volume occupied by the device as much as possible to prevent the generation of noise,

Second: by adjusting the period of applying and shielding high voltage to discharge and ground electrode to control the amount of ozone generated, eliminating the hassle of having to replace the catalyst at regular intervals by not using concentration diluent such as catalyst,

Thirdly, the purpose of the present invention is to selectively use the DC power source and the battery power source rectified with the commercial power source, and to allow free movement.

1 is an external view of a deodorant for a refrigerator according to the prior art,

2 is a block diagram of a ozone generator for a refrigerator according to the prior art,

3 is an external view of the ozone generator for a refrigerator according to the present invention,

4 is a circuit diagram of the ozone generator shown in FIG.

5 is a signal waveform diagram for adjusting the amount of ozone generated in the ozone generator shown in FIG.

<Explanation of symbols for the main parts of the drawings>

110: high voltage circuit section 111: oscillation boosting section

112: double voltage rectifier 113: discharge display

120: power supply unit 130: discharge electrode

140: ground electrode

Technical means of the present invention for achieving the above object, in the ozone generating device for a refrigerator to sterilize various bacteria in the refrigerator by using ozone to deodorize:

(1) a high voltage circuit section for generating a high voltage by boosting and backing an input power supply;

(2) a power supply unit for supplying any one of a DC power source and a battery power source rectified with commercial power to the high voltage circuit unit;

(3) a needle-shaped discharge electrode to which the negative voltage of the high voltage is applied;

(4) a lattice shaped ground electrode spaced apart from the discharge electrode by a predetermined distance and receiving the positive voltage of the high voltage;

A negative corona discharge is induced at the discharge electrode, and ozone generated between the discharge electrode and the ground electrode is directed toward the ground electrode to form an air flow.

Preferably, the high voltage circuit unit,

(1) an oscillation booster which receives a DC voltage and oscillates through a flyback transformer and outputs boosted power;

(2) a double voltage rectifier for outputting the high voltage by rectifying the output voltage of the oscillation boosting unit;

And (3) a discharge display portion for displaying the corona discharge caused by the discharge electrode to the outside.

In this way, the ozone generated between the discharge electrode and the ground electrode is naturally formed as the air flows to the ground electrode, and it can be seen that the amount of ozone is controlled by adjusting the period in which the high voltage is applied / shielded to the discharge and ground electrode. .

As a result, even without using a forced blower such as a fan motor or a concentration diluent such as a catalyst, an effect equal to or higher than that of the conventional technology is generated, and various bacteria in the refrigerator are sterilized by ozone generated by corona discharge. Is deodorized.

There may be a plurality of embodiments of the present invention. Hereinafter, the ozone generator for a refrigerator according to the most preferred embodiment will be described in detail with reference to the accompanying drawings.

Through this preferred embodiment, it is possible to better understand the objects, features and advantages of the present invention.

3 is an external view of the ozone generator for a refrigerator according to the present invention, Figure 4 is a circuit diagram.

As shown in the figure, the ozone generator according to the present invention includes a high voltage circuit unit 110 that boosts and backs up an input power source to generate a high voltage, and any one of a DC power source and a battery power source rectified with commercial power. The power supply unit 120 to be supplied to the 110, the needle-shaped discharge electrode 130 to which the negative voltage of the high voltage is applied, and the positive voltage of the high voltage are separated from the discharge electrode 130 by a predetermined distance. It is composed of a grid-shaped ground electrode 140 to which a voltage is applied.

In addition, the high voltage circuit unit 110 receives a DC voltage and oscillates through a flyback transformer to output a boosted power, and an oscillation booster 111 and a half-wave double voltage output voltage of the oscillation booster 111. The rectifier is composed of a double voltage rectifier 112 for rectifying and outputting at twice the high voltage, and a discharge display unit 113 for displaying corona discharge caused by the discharge electrode 130 to the outside through a light emitting diode.

In the ozone generator for a refrigerator according to the present invention configured as described above, when the first switch SW1 of the power supply unit 120 is turned on, commercial power is rectified according to the switching state of the second switch SW2. Any one of a direct current (DC) power source and a battery (BAT) power source is supplied to the high voltage circuit unit 110.

Then, current flows in the high voltage circuit unit 110 along the primary coil L1 of the oscillation boosting unit 111 to the MOS-FET Q and the resistor R3, and the electric field formed by the primary coil L1. The voltage is induced in the secondary coil L2 across the winding of the secondary coil L2 wrapping the primary coil L2.

At this time, the resistance (R2) connecting the secondary coil (L2) connected to the gate terminal of the MOS-FET (Q) and the negative terminal of the power supply limits the current so that the gate terminal of the MOS-FET (Q) from overcurrent It protects and maintains the gate terminal voltage as negative voltage. The MOS-FET (Q) operates weakly in constant current mode regardless of the magnitude of gate voltage in the pinch-off region.

In addition, the resistor R3 maintains the pinch-off region of the MOS-FET Q to increase the sharpness of the switching and reduce the flow of the overall circuit current.

However, the fine current flow in the primary coil L1 temporarily induces a voltage exceeding the negative gate voltage to the secondary coil L2, and the voltage at the gate terminal becomes a short positive voltage to form a MOS-FET. (Q) is remarkably operated.

Then, the electric field in the primary coil L1 is increased to the maximum, and the induced voltage at this point disappears because the gate terminal of the MOS-FET Q becomes negative.

Then, the MOS-FET Q returns to operate in a constant current mode, that is, the minimum, and the electric field of the primary coil L1 is lowered. Thus, the combination of the MOS-FET Q and the coil operates as an oscillator. In other words, it is operated as an oscillator with a flyback transformer that controls the primary coil L1 on / off to instantly change the flow of current.

Here, the electric field around the primary coil (L1) is increased after each oscillation cycle and the process of decreasing is repeated, the electric field strength of the electric field is interacted with the winding of the coil to induce a pulse voltage therein.

Accordingly, the winding of the primary coil L1 is designed in plural, and the induced voltage pulses have a voltage much higher than that of the battery BAT.

On the other hand, when the MOS-FET Q stops operating, the high voltage induced in the primary coil L1 is charged to the capacitor C1 through the diode D1, and is connected to the positive terminal of the power supply 120. The voltage difference is generated between the capacitor C1.

When the capacitor C1 is charged to a predetermined voltage, discharge starts suddenly at the breakdown voltage of the diode D2, whereby a high voltage is generated through the coil L3, and a high voltage is induced in the coil L4.

Then, the capacitor C2 is charged through the diode D4 of the double voltage rectifying unit 112 in the negative half cycle period of the induced high voltage, and the capacitor C2 at high voltage in the positive half cycle. The capacitor C3 is charged through the diode D3 at a voltage superimposed with the charges, i.e., twice the high voltage.

Therefore, a negative voltage of the high voltage output from the double voltage rectifier 112 is applied to the needle-shaped discharge electrode 130, and a positive voltage is applied to the ground electrode 140.

Then, after the corona initiation voltage between the two electrodes 130 and 140, a negative corona discharge is induced at the discharge electrode 130 to attract electrons in the discharge electrode 130 to the ground electrode 140. Collision with the neutral gas, in the process of oxygen loses electrons and becomes a cation to the discharge electrode 130.

The electrons continue to be drawn toward the ground electrode 140 and then out of the corona discharge region to combine with oxygen to generate negative ions, that is, ozone.

At this time, the resistance R4 of the discharge display unit 113 protects the user from the impact of high voltage and protects the MOS-FET Q from the transient current, and the LED emits light to indicate the corona discharge state to the outside. .

Here, the ozone rapidly moves to the ground electrode 140 to generate an air flow, that is, an electronic storm to generate wind having a constant wind speed.

Therefore, ozone is released into the entire area of the refrigerator through the air flow, and various bacteria existing on the surface of the stored food as well as bacteria in the space are sterilized by ozone, and various odor components are decomposed and removed with strong oxidizing power.

On the other hand, the amount of ozone is changed depending on the size of the voltage applied to the discharge electrode 130 and the ground electrode 140 and the shape of the two electrodes (130, 140), the average concentration of ozone in the refrigerator depends on the area in the refrigerator. .

Therefore, the amount of ozone generated is controlled by adjusting the period of applying / shielding the corona starting voltage to the discharge electrode 130 and the ground electrode 140. That is, after calculating an appropriate amount of ozone generation, the amount of ozone is controlled by properly adjusting the switching time of the first switch SW1 in the power supply unit 120 by adjusting the duty ratio of the pulse signal shown in FIG. 5. .

Although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

As described above, according to the present invention, when the ozone generated between the discharge electrode and the ground electrode moves to the ground electrode, airflow is naturally formed, and when the cycle at which the corona start voltage is applied / shielded to the discharge and ground electrode is adjusted, The amount of generation is controlled.

Therefore, as a comparative example with the prior art, various bacteria in the refrigerator are sterilized by ozone generated by a negative corona discharge without using a forced blower such as a fan motor or a concentration diluent such as a catalyst. Will be.

Therefore, by not using a forced blower such as a fan motor, the volume occupied by the device is minimized, noise is prevented, the hassle of having to replace the catalyst at regular intervals is eliminated, and battery power can be selectively used to move freely. It can be effected.

Claims (2)

In ozone generator for refrigerators using ozone to sterilize various bacteria in the refrigerator and deodorize: (1) a high voltage circuit section for generating a high voltage by boosting and backing an input power supply; (2) a power supply unit for supplying any one of a DC power source and a battery power source rectified with commercial power to the high voltage circuit unit; (3) a needle-shaped discharge electrode to which the negative voltage of the high voltage is applied; (4) a lattice shaped ground electrode spaced apart from the discharge electrode by a predetermined distance and receiving the positive voltage of the high voltage; A negative corona discharge is induced at the discharge electrode, and ozone generated between the discharge electrode and the ground electrode is directed toward the ground electrode to form airflow. The method of claim 1, The high voltage circuit unit, (1) an oscillation booster which receives a DC voltage and oscillates through a flyback transformer and outputs boosted power; (2) a double voltage rectifier for outputting the high voltage by rectifying the output voltage of the oscillation boosting unit; (3) an ozone generator for a refrigerator, comprising: a discharge indicator for displaying the corona discharge caused by the discharge electrode to the outside.