KR19980077262A - Cold air discharge control device of refrigerator - Google Patents

Abstract

The present invention relates to a cold air discharge control device of the refrigerator to adjust the cold air discharge passage in the refrigerator compartment in conjunction with the opening and closing of the refrigerator compartment door, the present invention is a discharge louver for discharging the cold air in accordance with the opening and closing of the refrigerator compartment door. (2) Equipped with a cold air discharge control means for adjusting the closing and opening, it is possible to prevent the outside hot air from penetrating the interior of the evaporator through the damper by opening the refrigerating compartment door to prevent the rise of the internal temperature during defrosting operation At the same time it can reduce the power consumption by shortening the time required for defrosting, it is possible to minimize the damage to the food stored in the interior due to the temperature rise in the interior.

Description

Cold air discharge control device of refrigerator

The present invention relates to a cold air discharge control apparatus of a refrigerator, and more particularly, to control the cold air discharge passage inside the refrigerator compartment of the refrigerator in conjunction with opening and closing of the refrigerator compartment door.

In general, when the liquid refrigerant in the evaporator evaporates, the cooling is performed by taking heat away from the surroundings. At this time, the surface of the evaporator freezes moisture due to freezing of the surrounding water. In the same case, the cooling efficiency of the evaporator is greatly reduced, and the main factor to increase the load operation rate should be properly removed.

Accordingly, a defrost heater that is electrically heated to dissolve the frost is wired together with the refrigerant pipe in the evaporator of the refrigerator, and during operation of the refrigerator, the defrost heater is operated by removing the frost in addition to the cooling mode for maintaining the temperature in the refrigerator. Defrost mode is included.

The inside of the refrigerator of a conventional home refrigerator is installed to be divided into a freezer compartment and a refrigerating compartment, and an evaporator for generating cold air and a cold air fan for supplying cold air generated in the evaporator are installed in the refrigerator. 2. Description of the Related Art A refrigerator having two evaporators and two cold fans dedicated to a freezer compartment and a refrigerator compartment is known.

Referring to the structure of such a refrigerator, as shown in FIG. 1, two evaporators 14 and 12 and cold air fans 15 and 16 dedicated to the freezing compartment 13 and the refrigerating compartment 1 are respectively installed. In addition to 17, an electronic control system using a microcomputer that independently controls the sensors 18 and 19 for detecting respective internal temperatures is applied.

In such a cooling mode of the refrigerator, when the internal temperatures of the freezer compartment 13 and the refrigerating compartment 1 are at or above the set temperature, the cold air fans 15 and 16 are operated and the compressor 17 is the cold air fans 15 and 16. It works in conjunction with one side of), and in this cooling mode is added to the operating time of the compressor 17 is reached to a predetermined time is switched to the defrost mode.

Thereafter, in the defrost mode, both the compressor 17 and the cold air fans 15 and 16 are stopped, and the defrost heaters 20 and 21 attached to the evaporators 14 and 12 are operated. When the defrost is finished, the compressor 17 and the cold air fan 15 and 16 are operated for a predetermined time and then switched to the cooling mode.

On the other hand, in the defrost mode, there are various methods depending on the type of operation operation or the method of melting the frost. The problem is that since the defrost operation lasts a relatively long time, the internal temperature of the refrigerator is continuously increased while the compressor 17 and the cold fan ( 15) (16) is unable to operate due to the food stored in the interior is left to be damaged by the temperature rise in the interior.

Accordingly, the compressor 17 and the cold air fan 15 and 16 are continuously operated for a predetermined time (several minutes) before entering the defrost mode in order to prevent the food from being damaged due to the rise in the temperature during the defrosting operation. The pre-cool mode that sufficiently cools the internal temperature is performed first, and the defrost mode is immediately performed after the pre-cool mode.

However, in the conventional refrigerator, the evaporator (14) 12 during the defrosting operation, the temperature of the evaporator (14) 12 is significantly lowered by preliminary cooling, and in this state, the defrost heater (20) 21 is operated so that the evaporator (14). As the defrosting time, that is, the defrosting time becomes longer, the power consumption for pure defrosting required for the operation of the defrosting heaters 20 and 21 increases, as well as preliminary cooling. Including the power consumption according to the load operation for the power consumption of the entire defrost was high.

In particular, when the user opens and closes the freezer compartment and the refrigerating compartment doors 22 and 4 for use of the refrigerator, the inside of the premises may have a sudden rise in temperature in the vicinity of the freezer compartment and the refrigerating compartment doors 22 and 4, in particular the user. Opening the frequently used refrigerating compartment door 4 causes the temperature of the inside of the refrigerator to rise as the cold air in the refrigerating compartment 1 flows out of the refrigerator and the outside air flows into the refrigerating compartment 1 and the evaporator 12. As a result, not only the above-mentioned power consumption increase during the defrosting operation, but also damage to food stored in the refrigerator compartment door 4 is often caused, thereby lowering the reliability of the product.

The present invention is to solve the above-mentioned problems, it is possible to variably control the cold air discharge passage in the refrigerator compartment of the refrigerator according to the opening and closing of the refrigerator compartment door to prevent the rise of the internal temperature during defrosting and at the same time defrost The purpose of the present invention is to provide a cold air discharge control device of a refrigerator that can shorten the time, reduce power consumption, and minimize damage of food stored in the refrigerator due to a rise in temperature in the refrigerator.

1 is a longitudinal cross-sectional view showing a cut of the cold air circulation system of the conventional refrigerator.

2 is a perspective view showing a damper according to the present invention

3 is a side view showing the operating state of FIG.

Explanation of symbols on the main parts of the drawings

One; Cold room 2; Discharge louver

3; Damper 4; Cold room door

5; Guide members 6,8; Ratchet

9; Rotating member 10; Motor shaft

11; motor

In order to achieve the above object, the present invention is achieved by providing a cold air discharge control apparatus of a refrigerator equipped with a cold air discharge control means for adjusting the discharge louvers for discharging cold air in accordance with the opening and closing of the refrigerating compartment door in the refrigerating compartment. .

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

Figure 2 is a perspective view showing a damper according to the present invention, Figure 3 is a side view showing the operating state of Figure 2, the present invention for discharging the cold air into the interior of the refrigerating chamber (1) in the center of the rear of the refrigerating chamber (1) of the refrigerator. A damper (3) having a plurality of discharge louvers (2) rotatably coupled to the front center is installed, and one end of each of the discharge louvers (2) is coupled to the inside of the damper (3) to open the refrigerator compartment door (4). The guide member 5 which is raised and lowered to close and open the discharge louvers 2 is installed in accordance with the opening and closing of the "

In addition, the lower end of the guide member 5 is integrally formed with a movable member 7 having a ratchet 6 formed on its inner surface to raise and lower the guide member 5 in accordance with the opening and closing of the refrigerating compartment door 4. The ratchet 6 is formed inside the ratchet 6 of the movable member 7 so that the ratchet 8 is formed at only 180 ° of the outer circumferential surface thereof so as to contact the ratchet 6, thereby rotating the movable member 7 in order to lift and move the movable member 7. ) Is provided, and the length of the ratchet 8 formed on the rotating member 9 is formed to be 1/2 of the length of the ratchet 6 of the movable member 7.

One side of the rotating member 9 is connected to the rotating member 9 and the motor shaft 10 to install a motor 11 that drives in one direction to generate power for rotating the rotating member 9. do.

The operation of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

The refrigerating compartment (1) with a damper (3) in which a plurality of discharge levers (2) for discharging cold air into the refrigerating compartment (1) in the center of the rear side of the refrigerating compartment (1) are rotatably coupled to the front center thereof. When the refrigerating compartment door 4 is closed, the plurality of discharge levers 2 rotatably coupled to the damper 3 are opened as shown in FIG. 3, so that the cold air is stored in the refrigerating compartment 1 through the plurality of discharge levers 2. It is supplied internally.

Thereafter, when the user stores the food inside the refrigerator compartment 1 of the refrigerator or opens the refrigerator compartment door 4 to withdraw the food, the sensing means detects the state where the refrigerator compartment door 4 is opened and rotates in one direction. As the motor 11 is driven and rotated, the rotational force of the motor 11 is transmitted through the motor shaft 10, and when the rotating member 9 connected to the motor shaft 10 rotates, the rotating member 9 is rotated. A ratchet 8 having only 180 ° portion of the outer circumferential surface is installed inside the damper 3 so that one end of each of the discharge louvers 2 is integrally formed at the lower end of the guide member 5 to which the discharge louvers 2 are coupled. As the ratchet 6 rotates 180 ° in the state shown in FIG. 3A in contact with the ratchet 6 inside the ratchet 6, the ratchet 6 of the rotatable member 9 moves on the side of the movable member 7. The moving member 7 is lowered because it is pushed while in contact with it.

At the same time, when the refrigerating compartment door 4 is opened as the guide member 5 descends and closes the discharge louvers 2 having one end coupled to the guide member 5 in the same state as the virtual line of FIG. 3. It is possible to completely block the outside hot air from penetrating into the evaporator 12 through the interior of the damper (3).

In addition, as the refrigerating chamber door 4 is opened, the movable member 7 and the guide member 5 are lifted up to form a plurality of discharge louvers 2 rotatably coupled to the damper 3 as shown in FIG. 3. When the user closes the refrigerating compartment door 4 in the closed state, the motor 11 is driven and rotates again while the moving member 7 and the guide member 5 are lowered, through the motor shaft 10. When the rotational force of the motor 11 is transmitted and the rotating member 9 connected to the motor shaft 10 rotates by 180 ° again, the ratchet 8 formed with only 180 ° of the outer circumferential surface of the rotating member 9 is a guide member. In the ratchet 6 of the inner circumferential surface of the movable member 7 integrally formed at the lower end of the 5, the movable member 7 is raised as it rotates 180 ° again while contacting the other side of the ratchet 6. .

At the same time, the guide member 5 is raised to open the discharge louvers 2, one end of which is coupled to the guide member 5, as shown in FIG. Can supply cold air.

On the other hand, as the length of the ratchet 8 formed on the rotating member 9 is 1/2 of the length of the ratchet 6 of the moving member 7, the rotating member 9 is rotated 360 degrees so that the moving member 7 ) Will do one up and down movement.

As described above, as the user opens and closes the refrigerating compartment door 4, the cold air discharge passage inside the refrigerating compartment 1 can be controlled variably, thereby preventing the temperature rise in the refrigerator during defrosting operation, thereby effectively maintaining a constant temperature, and defrosting. It can shorten the time required to reduce the power consumption, and it is possible to restrain the food stored in the interior from being damaged by the temperature increase in the interior to the maximum extent.

As described above, the present invention can efficiently control by closing and opening the cold air discharge passage of the damper installed inside the refrigerator compartment of the refrigerator in accordance with the opening and closing of the refrigerator compartment door, so that the outside hot air is prevented by opening the refrigerator compartment door. It can prevent the inside of the evaporator from penetrating the inside of the evaporator to prevent the rise of the internal temperature during defrosting, and it can shorten the time required for defrosting, thus reducing the power consumption. It is a very useful invention that can greatly minimize the damage caused by the temperature rise, thereby greatly improving the efficiency and reliability of the product.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (6)

The cold air discharge control apparatus of the refrigerator, characterized in that the cold air discharge control means for adjusting the discharge louver for discharging the cold air in accordance with the opening and closing of the refrigerating chamber door in the refrigerating compartment. The damper according to claim 1, wherein the cold air discharge control means is installed at the rear center of the refrigerating compartment, and a plurality of discharge louvers are rotatably coupled to the front center of the damper for discharging the cold air into the refrigerating compartment, respectively. One end of the discharge louver is coupled to the guide member which is lifted to close and open the discharge louver according to the opening and closing of the refrigerating compartment door, and integrally formed at the lower end of the guide member to move the guide member according to the opening and closing of the refrigerating compartment door. Cold air discharge control of the refrigerator comprising a moving member, a rotating member rotating to move the moving member up and down, and a motor connected to the rotating member and a motor shaft to drive to generate power for rotating the rotating member. Device. The apparatus of claim 2, wherein a ratchet is formed on an inner surface of the movable member, and a ratchet formed on an outer circumferential surface of the rotating member is installed in the ratchet of the movable member to be in contact with the ratchet. The apparatus of claim 3, wherein the ratchet formed on the outer circumferential surface of the rotating member is formed only at 180 degrees of the outer circumferential surface. The apparatus of claim 3, wherein the length of the ratchet formed on the rotating member is formed to be 1/2 of the length of the ratchet of the movable member. The apparatus of claim 2, wherein the motor is driven in one direction.