KR100556395B1 - defroster of evaporator for refrigerator - Google Patents

Abstract

The present invention provides a defrosting apparatus for a condenser for a refrigerator, which can reduce the power consumption of the refrigerator by minimizing the time required for the defrosting operation by allowing the heat generated from the defrosting heater to be quickly transferred to the surface of the evaporator during the defrosting operation. Its purpose is to.

To this end, the present invention is the cold air inlet and outlet is possible, the cold air duct circulating the cold air in the air; An evaporator provided in the cold air duct; In addition, there is provided a defrosting apparatus of the evaporator for a refrigerator, which is provided in the cold air duct, and configured to include a forward and a reverse fan and a motor driving the same.

Refrigerator, Evaporator, Defroster

Description

Defroster of evaporator for refrigerator

1 is a longitudinal sectional view schematically showing the structure of a typical refrigerator;

Figure 2 is a longitudinal sectional view schematically showing the main part to explain the defrosting process of a conventional refrigerator

3 is a longitudinal sectional view schematically showing the structure of a refrigerator according to an embodiment of the present invention;

Figure 4 is a longitudinal sectional view schematically showing an open state of the opening and closing means according to a preferred embodiment of the present invention

Figure 5 is a longitudinal sectional view schematically showing a closed state of the opening and closing means according to an embodiment of the present invention

Figure 6 is a longitudinal sectional view schematically showing a state in which the stationary fan and the defrost heater is integrated according to another embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

100: case 110: freezer

120: machine room 200: evaporator

300: defrost heater 400: blowing fan

500: cold air duct 510: discharge port

520: suction port 600: normal and reverse fan

700: first opening and closing part 710: first guide body

720: first opening 730: first copper plate

800: second opening and closing part 810: second guide body

820: second opening 830: the second copper plate

The present invention relates to a defrosting apparatus for an evaporator for a refrigerator, and more particularly, to an apparatus for removing frost formed on an evaporator surface after an evaporation action.

In general, a refrigerator is a device that keeps food fresh for a certain period of time by reducing the temperature in the refrigerator as the refrigerant is repeatedly compressed, condensed, expanded, and evaporated.

Such a refrigerator includes a compressor for raising / heating a low temperature / low pressure gas refrigerant to a high temperature / high pressure gas refrigerant, a condenser for condensing the refrigerant introduced from the compressor by outside air, and a narrow diameter compared to the diameter of other parts. It consists of an expansion valve for reducing the refrigerant introduced from the condenser, and the evaporator which absorbs the heat in the refrigerator as the refrigerant passing through the expansion valve in a low pressure state as a basic component constitutes a refrigeration cycle.

Hereinafter, a structure and an operation of a general refrigerator will be described with reference to the accompanying drawings.

1 is a vertical cross-sectional view schematically showing the structure of a conventional refrigerator, Figure 2 is a longitudinal cross-sectional view schematically showing the main part to explain the defrosting process of a conventional refrigerator.

As shown in FIG. 1, the refrigerator includes a freezer compartment 110 and a freezer compartment in which cold air heat-exchanged by the evaporator 200 is directly introduced into the case 100 to maintain an internal temperature of about −18 ° C. Cold air is introduced into the refrigerating chamber that maintains the internal temperature of about 0 ~ 7 ℃, largely divided, the machine chamber 120 is provided under the rear of the freezing chamber.

In addition, the rear of the freezing chamber 110 is provided with a cold air duct 500 through which the cold air is introduced to heat exchange while circulating the freezer compartment and the refrigerating compartment, and the evaporator together with the evaporator 200 in the cold air duct 500. A blower fan 400 for forcibly circulating the cold air cooled by the freezing chamber 110 and a motor 410 for driving the blower fan are provided.

In addition, a cold air discharge port 510 and a cold air suction port 520 are formed at upper and lower portions of the cold air duct 500, respectively.

On the other hand, although not shown in the drawing, the case 100 has a freezing compartment 110 and a refrigerating compartment divided into left and right sides by a barrier, and the barrier is formed with a plurality of communication ports through which free air of the freezing compartment and the refrigerating compartment can be freely exchanged. The cold air of the supply to the cold compartment and the cold air of the cold compartment may be introduced into the cold air duct (500).

The machine room 120 is provided with a plurality of components constituting a refrigeration cycle together with the evaporator 200, that is, a compressor and a condenser, and at the same time, heat generated in the machine room 120, in particular, heat generated from the condenser A heat radiating fan is further provided for cooling by forced blowing.

The refrigerator configured as described above is operated by receiving a control signal of a controller (not shown) in the freezer compartment 110 and the refrigerating compartment when power is applied, and the evaporator 200 is operated by the freezing cycle as described above. Heat exchange environment is created.

Therefore, the cold air passing through the evaporator 200 is lowered by the endothermic action, and is discharged into the freezing chamber 110 by the operation of the blower fan 400.

Subsequently, some of the cold air is introduced into the refrigerating chamber through the cold air communication port.

Thereafter, the cold air that has been heated while circulating the freezing compartment 110 and the refrigerating compartment has a cold air circulation structure introduced into the evaporator 200 through the cold air inlet 520.

On the other hand, in the refrigerator, the frost phenomenon occurs in the evaporator 200 due to the moisture introduced from the inside of the refrigerator occurs.

That is, the temperature of the surface of the evaporator 200 maintains a low temperature, whereas the temperature around the evaporator 200 is relatively high temperature, the moisture of the surface of the evaporator is cooled by the temperature difference, and the moisture is frozen as it is by the temperature of the surface of the evaporator. The frost on the evaporator 200 is attached.

Since such frost reduces the cooling efficiency as a factor that inhibits the flow of cold air, a defrosting operation for removing frost every certain time is necessary.

To this end, a plurality of defrost heaters 300 are provided around the evaporator 200.

The defrost heater 300 is a contact type defrost heater (not shown) which is in contact with the evaporator 200 and transfers heat to the fins of the evaporator 200 by conduction, and is spaced apart from the evaporator 200 by a predetermined distance. There is a non-contact defrost heater 300 to transfer heat to the pin of the evaporator, depending on the refrigerator or any one or both apply.

Therefore, during the defrosting operation, the defrost heater 300 may be supplied with power to transfer heat to the pins of the evaporator 200 to remove frost formed on the evaporator, and the water generated at this time may be a separate house. It can be discharged to the outside of the refrigerator through water bottles and collecting pipes or it can evaporate on its own.

However, during the defrosting operation as described above, since the temperature in the refrigerator rises due to the heat generation of the defrost heater 300, a lot of refrigeration loads are applied at the initial stage of the next refrigeration cycle operation, and thus, the evaporator 200 The burden increases, which in turn lowers the cooling efficiency.

In addition, these defrost heaters 300 are heat generated by receiving power, and in some cases excessive power is supplied in order to raise the required temperature, resulting in a safety problem due to the temperature is higher than necessary. there was.

The present invention has been made to solve the above-mentioned conventional problems, by minimizing the time required for the defrosting operation to ensure that the heat generated from the defrost heater during the defrosting operation is quickly transferred to the surface of the evaporator as a whole, the power consumption of the refrigerator It is an object of the present invention to provide a defrosting apparatus for an evaporator for a refrigerator capable of reducing the amount of oil.

In order to achieve the above object, the present invention is capable of introducing and discharging cold air, a cold air duct through which cold air is circulated in the refrigerator, an evaporator provided in the cold air duct, and provided in the cold air duct, thereby allowing forward and reverse rotation. It provides a defrosting device for a refrigerator evaporator, characterized in that configured to include a stationary fan and a motor for driving the same.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 3 to 6.

Figure 3 is a longitudinal sectional view schematically showing the structure of a refrigerator according to an embodiment of the present invention, Figure 4 is a longitudinal sectional view schematically showing a state in which the opening and closing means according to a preferred embodiment of the present invention.

In addition, Figure 5 is a longitudinal sectional view schematically showing a closed state of the opening and closing means according to a preferred embodiment of the present invention, Figure 6 is a schematic view showing a state in which the stationary fan and the defrost heater is integrally configured according to another embodiment of the present invention It is a longitudinal cross-sectional view shown.

For reference, prior to describing the configuration of the present invention, in order to avoid duplication of description of the prior art reference to the same reference numerals will be referred to.

That is, Figure 3 shows a heat dissipation structure of the condenser for the refrigerator according to the embodiment of the present invention, the inlet and discharge of cold air, the cold air duct 500 and the cold air duct 500 through which cold air is circulated in the refrigerator. It includes an evaporator 200 provided in the inside, and a stationary fan 600 provided in the cold air duct 500, and configured to enable forward and reverse rotation, and a motor 610 for driving the same.

In addition, the space in which the evaporator 200 and the stationary fan 600 are located among the spaces for forming the cold air duct 500 further includes an opening and closing means for opening and closing the space.

Here, the opening and closing means includes a first opening and closing part 700 for selectively blocking the flow of cold air discharged through the evaporator 200.

Here, the first opening and closing part 700 is a plurality of first guide body 710 formed of a plurality of first openings 720 and one side is hinged to the first guide body 710 to rotate a predetermined angle It is configured to include a one-turn plate 730.

Here, the first rotating plate 730 is mounted on the opposite side to the space side of the space provided with the forward and reverse fan 600 and the evaporator 200 of the both sides of the first guide body 710 and the opposite side surface It is configured to be rotatable.

In addition, the plurality of first pivoting plates 730 may be formed to have a size sufficient to cover the plurality of first openings 720 of the first guide body 710, respectively.

This is, when the reverse fan 600 is rotated in reverse direction, the first rotating plate 730, each end portion is caught on the other end of the first rotating plate 730 is the forward and reverse fan 600 and the evaporator 200 This is to prevent the rotation to the provided space side.

In addition, the first rotating plate 730 is preferably formed of a thin thin plate to be opened and closed by the wind speed generated during the rotation of the stationary fan 600, respectively.

This is because the first rotating plate 730 is configured to be rotated without the need for a separate driving means, the first rotating plate 730 is rotated only by the wind speed of the stationary fan 600, the first opening ( 720 is to open and close.

In addition, each of the first rotating plate 730 is formed to be rotated upward by a predetermined angle with respect to the ground during the forward rotation of the stationary fan 600.

In addition, the first opening and closing portion 700 is mounted so as to correspond to the lower side, the second opening and closing portion 800 to selectively block the flow of cold air flowing toward the evaporator 200 is configured to further include .

Here, the second opening and closing portion 800 is a second guide body 810 formed of a plurality of second openings 820, a plurality of the first side hinged to the second guide body 810 is rotated a predetermined angle It is configured to include a second rotating plate (830).

Here, the second rotating plate 830 is mounted on the surface of the space side provided with the stationary fan 600 and the evaporator 200 of both sides of the second guide body 810 is configured to be rotatable to the space side. do.

In addition, the second pivoting plate 830 may be formed to have a size enough to cover the second opening 820 of the second guide body 810.

When the reverse fan 600 is rotated in reverse direction, the second pivot plate 830 is caught at the other end thereof, so that the second pivot plate 830 is the reverse fan 600 and the evaporator 200. This is to prevent rotation in the opposite direction to the provided space side.

Here, the second rotating plate 830 is also preferably formed of a thin thin plate to be opened and closed by the wind generated during the rotation of the stationary fan 600, respectively.

The second pivoting plate 830 is configured to be rotated without the need for a separate driving means, and the second pivoting plate 830 is rotated only by the wind speed of the stationary fan 600 so that the second opening portion ( 820) to open and close.

In addition, each of the second pivoting plates 830 is formed to be rotated upward by a predetermined angle with respect to the ground when the forward and rearward fan 600 rotates forward.

In addition, the frost formed on the surface of the evaporator 200 is removed by using the heat generated by the motor 610 when the motor 610 is driven.

On the other hand, the first and second opening and closing portion 700 and the second opening and closing portion 800, and the location where the stationary fan 600 for discharging the cold air introduced into the cold air duct 500 is provided in the evaporator 200 It is presented as an embodiment of the present invention to be provided on the upper side of the.

Of course, the position of the stationary fan 600 is also understood to be provided on the lower side of the evaporator 200.

In addition, a defrost heater 300 is provided in the cold air duct 500 to generate a predetermined heat.

In the heat dissipation device of the condenser for a refrigerator as described above, embodiments of various arrangement structures are provided according to positions where the stationary fan 200 and the defrost heater 300 are provided.

First, the stationary fan 600 is installed above the evaporator 200, and the defrost heater 300 is installed above the stationary fan 600.

Next, the defrost heater 300 is installed on the upper side where the evaporator 200 is provided, and the stationary fan 600 is installed on the upper side where the defrost heater 300 is installed.

Next, the stationary fan 600 is installed below the evaporator 200, and the defrost heater 300 is installed below the stationary fan 600.

Next, the defrost heater 300 is installed below the evaporator 200, and the stationary fan 600 is installed below the defrost heater 300.

Next, the defrost heater 300 is installed above the evaporator 200 with the evaporator 200 interposed therebetween, and the stationary fan 600 is installed below the evaporator 200.

Next, the stationary fan 600 is provided above the evaporator 200 with the evaporator 200 interposed therebetween, and the defrost heater 300 is installed below the evaporator 200.

Of course, as shown in Figure 6, the defrost heater 300 is configured integrally with the stationary fan 600, it is also possible to present that the upper or lower side provided with the evaporator 200.

As shown in FIGS. 4 and 5, in each of the above-described embodiments of the present invention, the evaporator 200 is used to effectively use heat generated when the motor 610 is driven, with a better effect during defrosting operation. The stationary fan 600 is installed on the upper side provided, and the defrost heater 300 is installed on the upper side of the stationary fan 600 is provided in a preferred embodiment.

Next will be described the operation of the heat radiation device of the evaporator for a refrigerator through a preferred embodiment of the present invention.

First, during normal cooling operation, the stationary fan 600 is rotated in the forward direction so that hot air circulated in the blast furnace and changed to a high temperature is introduced into the cold air duct 500.

At this time, when the forward and reverse fan 600 is rotated in the forward direction, the opening and closing means, that is, the first opening and closing part 700 and the second opening and closing part 800 by the wind speed of the forward and rearward fan 600 is a predetermined interval around the ground. Open upwards.

In other words, when the forward / reverse fan 600 is rotated in the forward direction, the first pivot plate 730 of the first opening / closing part 700 is rotated and the second pivot plate 730 of the second opening / closing part 800 is rotated. The rotation is such that the first opening 720 and the second opening 820 are opened.

At this time, the hot air of the blast furnace is introduced through the open second opening 820, the introduced hot air is changed to cold air after heat exchange with the evaporator 200 when passing through the evaporator 200. .

Here, the cold air changed into cold air while passing through the evaporator 200 is discharged through the open first opening 720 and then circulated again in the interior of the refrigerator.

When the above series of processes are repeatedly performed, the temperature of the surface of the evaporator 200 is maintained at a low temperature, whereas the air carried from the blast furnace is at a high temperature, and thus the surface of the evaporator 200 is filled with moisture due to the temperature difference. This moisture is repeatedly frozen in the frost generated by freezing as it is by the temperature of the surface of the evaporator (200).

At this time, the defrosting operation is performed to remove frost generated in the evaporator 200.

First, in order to perform the defrosting operation, the forward and reverse fan 600 is rotated in the reverse direction.

At this time, the opening and closing means, that is, the first opening / closing part 700 and the second opening / closing part 800, which are opened when the motor is opened in the forward direction due to the wind speed generated by the reverse rotation of the stationary fan 600, is closed.

In other words, when the stationary fan 600 is rotated in the reverse direction, the first rotating plate 730 of the first opening / closing part 700 and the second rotating plate 730 of the second opening / closing part 700 move downward. The first opening 720 and the second opening 820 are rotated to be closed.

Next, the defrost heater 300 provided in the cold air duct 500 is operated.

The air inside the cold air duct 500 is changed to a high temperature by the heat generated during the operation of the defrost heater 300, the air is changed to the high temperature by the reverse rotation of the stationary fan 600, the closed cold air duct (500) Forced circulation inside.

That is, the hot air heated by the defrost heater 300 is forced to convection inside the closed cold air duct 500 by the stationary fan 600 to remove frost formed on the surface of the evaporator 200. Be sure to

Therefore, during the defrosting operation, the air is forcedly circulated only in the closed cold air duct 500, so that heat transfer of forced convection occurs, thereby shortening the defrosting operation time, and minimizing the temperature rise in the refrigerator. .

In addition, since the heat generated from the motor 610 driving the stationary fan 600 and the defrost heater 300 are used during the defrosting operation, the defrosting operation time can be shortened, and thus the defrosting efficiency is increased. .

Next, after the defrosting operation is performed and the frost formed on the surface of the evaporator 200 is removed, the operation of the defrost heater 300 is stopped and the normal and reverse fan 600 is driven in the forward direction to open and close the opening and closing. By opening the means, normal cooling operation is resumed.

As described above, the present invention is equipped with an opening and closing means for closing the space of the cold air duct provided with the evaporator and the stationary fan and operating the stationary fan during the defrosting operation to force the air circulated only in the cold air duct. By causing heat transfer by convection, the heat generated from the defrost heater during the defrosting operation is quickly transmitted to the entire evaporator, thereby minimizing the time required for the defrosting operation, thereby reducing the power consumption of the refrigerator. It can be effective.

In particular, by using the heat of the defrost heater in addition to the heat of the motor driving the stationary fan during the defrosting operation, the heat capacity of the defrost heater can be reduced, and thus, a refrigerator to which an explosive ammonia series (R600a) refrigerant is applied at a high temperature. There is also an effect that contributes to stability.

Claims (22)

A cold air duct capable of introducing and discharging cold air and circulating cold air in the air; An evaporator provided in the cold air duct; A forward and backward fan provided in the cold air duct, the forward and reverse rotation being possible; And a motor for driving the stationary fan and defrosting the evaporator by using the heat generated when driving the stationary fan. The method of claim 1, The defrosting apparatus of the evaporator for a refrigerator, characterized in that the space in which the evaporator and the stationary fan are located in the space for forming the cold air duct is further included opening and closing means for opening and closing the space. The method of claim 2, The opening and closing means is Defroster of the refrigerator evaporator characterized in that it comprises a first opening and closing unit for selectively blocking the flow of cold air discharged through the evaporator. The method of claim 3, wherein The first opening and closing part A first guide body formed of a plurality of first openings; Defrosting apparatus of the evaporator for a refrigerator, characterized in that one side comprises a plurality of first rotating plate hinged to the first guide body is rotated by a predetermined angle. The method of claim 4, wherein The first rotating plate is Defrosting apparatus of the evaporator for a refrigerator, characterized in that it is mounted on the side opposite to the surface of the space side provided with the stationary fan and the evaporator of the both sides of the first guide body to be rotated to the opposite side. The method of claim 5, The first rotating plate is Defroster of the evaporator for a refrigerator, characterized in that the size formed to cover the first opening of the first guide body. The method of claim 4, wherein The first rotating plate is Defroster of the evaporator for a refrigerator, characterized in that formed in a thin thin plate to be opened and closed by the wind speed generated when the stationary fan. The method of claim 4, wherein The first rotating plate is The defrosting apparatus of the evaporator for a refrigerator, characterized in that is formed to be rotated upward by a predetermined angle with respect to the ground during the forward rotation of the stationary fan. The method of claim 3, wherein Defroster of the refrigerator evaporator characterized in that it further comprises a second opening and closing unit for selectively blocking the flow of cold air flowing toward the evaporator. The method of claim 9, The second opening and closing part A second guide body formed of a plurality of second openings; Defrosting apparatus of the evaporator for a refrigerator, characterized in that one side comprises a plurality of second rotating plate hinged to the second guide body is rotated by a predetermined angle. The method of claim 10, The second rotating plate is The defrosting apparatus of the evaporator for a refrigerator, characterized in that the second guide body is mounted on the surface of the space side provided with the stationary fan and the evaporator and is rotatable to the space side. The method of claim 11, The second rotating plate is Defroster of the evaporator for a refrigerator, characterized in that it is formed in a size enough to cover the opening of the second guide body. The method of claim 10, The second rotating plate is Defroster of the evaporator for a refrigerator, characterized in that formed in a thin thin plate to be opened and closed by the wind speed generated when the stationary fan. The method of claim 10, The second rotating plate is The defrosting apparatus of the evaporator for a refrigerator, characterized in that is formed to be rotated upward by a predetermined angle with respect to the ground during the forward rotation of the stationary fan. The method of claim 1, The stationary fan is a defrosting apparatus of the evaporator for a refrigerator, characterized in that located above the evaporator. The method of claim 1, The stationary fan is a defrosting apparatus of the evaporator for a refrigerator, characterized in that located below the evaporator. The method of claim 15, The defrost apparatus of the evaporator for a refrigerator, further comprising a defrost heater provided in the cold air duct to generate predetermined heat. The method of claim 17, The defrost heater is a defrost apparatus of the evaporator for a refrigerator, characterized in that located between the stationary fan and the evaporator. The method of claim 1, The defrost apparatus of the evaporator for a refrigerator, further comprising a defrost heater provided in the cold air duct to generate predetermined heat. The method of claim 19, The defrost heater is a defrost apparatus of the evaporator for a refrigerator, characterized in that located above the evaporator. The method of claim 19, The defrost heater is a defrost apparatus of the evaporator for a refrigerator, characterized in that located below the evaporator. The method of claim 19, The defrost heater is a defrost apparatus of the evaporator for a refrigerator, characterized in that integral with the stationary fan.

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