KR100222930B1 - Refrigerator having air distribution apparatus - Google Patents

Abstract

The present invention relates to a refrigerator having a cooling chamber for cooling and storing food, comprising: a cold air duct installed on one side wall of the cooling chamber to guide the flow of cold air and having a cold air discharge opening opened toward the cooling chamber; At least one cold air distribution wing having an axis parallel to the front of the cold air discharge port; A rotating shaft rotatably installed in the cold air duct at a rear side of the cold air distribution blade; A drive motor for rotating the rotating shaft; Transmission means disposed between the cold air distribution blade and the rotary shaft to convert the rotational movement of the rotary shaft into a rotational movement in a predetermined one direction of the cold air distribution blade, and the cold air distribution moved in one direction by the transmission means. And biasing means for returning the cold air distributing wing to the initial position by elastically biasing the blade in the other direction. As a result, no vortices are generated around the cold air discharge port, and thus the cold air distribution device can be operated well. As a result, the homogeneous distribution of the cold air distribution device eliminates the sand dune area in the cooling chamber and at the same time achieves efficient concentrated cooling. Will be.

Description

Refrigerator with cold air distribution unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to a refrigerator having a cold air distribution device for uniformly distributing cold air discharged into a cooling chamber for cooling and storing food.

A refrigerator having a conventional cold distribution device is disclosed in PCT application WO 95/27278 by the applicant of the present invention, and FIGS. 8 to 10 show a refrigerator having such a conventional cold distribution device. In the refrigerator 101 having a conventional cold air distribution device, a pair of cooling chambers divided into a freezing chamber 2 and a refrigerating chamber 3 by an intermediate partition 5 in a substantially rectangular main body is provided. Opening / closing doors 6 and 7 are provided on the front openings 2 and 3, respectively. In the main body, a refrigeration system comprising a compressor 11, a condenser, a freezer compartment evaporator 12a, and a refrigerator compartment evaporator 12b (not shown) is installed. It is supplied to each cooling chamber by the refrigerator compartment fan 13b.

On the other hand, in the rear wall of the refrigerating chamber 3, a cold air duct 15 is provided in which cold air from the refrigerating chamber evaporator 12b is blown by the refrigerating chamber fan 13b and flows therein. The cold air distribution device 110 is installed in the vertical direction. On the rear wall surface of the refrigerating chamber 3, a cold air discharge port 16 through which cold air from the cold air duct 15 is discharged to the refrigerating room 3 is formed, and the cold air distribution device 110 guides the supplied cold air to the cold air discharge port. It supplies to the refrigerating compartment 3 through 16. At the rear of the cold air duct 15, a circulation duct 17 connecting the refrigerating chamber 3 and the refrigerator compartment evaporator 12b is formed to be isolated from the cold air duct 15. The cold air which cooled the refrigerator compartment 3 returns to the refrigerator compartment evaporator 12b via this circulation duct 17. As shown in FIG.

The cold air distribution device 110 includes a rotation shaft 121, a plurality of cold air distribution blades 111, and a drive motor 131 for rotating the rotation shaft 121. The rotating shaft 121 is rotatably installed on the rear side of the refrigerating chamber 3, and the rotating shaft 121 of the driving motor 131 is coupled to the upper portion of the rotating shaft 121. The cold air distribution blades 111 are formed in a plate-shaped body curved in a wave shape with respect to the plane including the axis of the rotation shaft 121, and are spaced apart from each other to correspond to each of the cold air discharge ports 16 along the rotation shaft 121. It is. At the upper and lower ends of each cold air distributing wing 111, a pair of end plates 113 formed of an upper plate 113a and a lower plate 113b is formed, and an intermediate plate is formed between the upper plate 113a and the lower plate 113b. 115 is provided to partition the cold air distribution blade 111 into the first blade portion 117 and the second blade portion 119. Each wing portion 117, 119 is bent to form an S-shaped cross section, and each wing portion 117, 119 of each cold air distribution wing 111 is bent in the opposite direction to each other.

In the refrigerator 101 having the conventional cold air distribution device 110 having such a configuration, when the driving motor 131 rotates the rotary shaft 121 at a low speed, the cold air supplied along the cold air duct 15 is cold air distribution wing 111. The direction of the flow path is changed by the curved plate surface of the shells, and spreads in the refrigerating chamber from side to side and is discharged. On the other hand, when intensive cooling is necessary for a specific site, the rotating shaft 121 is stopped in accordance with the direction of the cold air distribution blade 111 so that cold air is concentrated and discharged toward the site. By such a cold air distribution device 110, it becomes possible to realize uniform cooling and concentrated cooling in the refrigerating chamber 3.

By the way, in recent years, a refrigerator becomes large and the cooling room becomes gradually widen, and the uniform distribution of cold air using the conventional cold air distribution apparatus will inevitably generate a limit. Thus, the four-sided sand region that the cold air does not reach the corner region in the cooling chamber, there is a problem that can not be stored well food. In the conventional cold air distribution device, since the vortices are formed around the cold air discharge port 16 by the cold air flowing along the wings 117 and 119 having a gentle S-shaped cross section, such a vortex is a cold air distribution device ( There is a problem that it acts as a load on the smooth operation of 110) and inhibits uniform cold distribution in the cooling chamber.

Accordingly, an object of the present invention is to provide a refrigerator having a cold air distribution device capable of uniformly dispensing the discharged cold air to remove the dune area in the cooling chamber and to maintain a balanced cooling state in view of such a conventional problem. It is.

Another object of the present invention is to provide a refrigerator having a cold air distribution device, which completely improves the problem of the conventional cold air distribution device so that no vortices are generated around the cold air discharge port, so as to distribute cold air satisfactorily.

1 is a front sectional view of a refrigerator having a cold air distribution device according to the present invention;

2 is a side cross-sectional view of FIG.

3 is a partially enlarged view of FIG. 2;

4 is an exploded perspective view of a cold air distribution device according to the present invention;

5 to 7 is a cross-sectional view of the coupled state of Figure 4, a view for explaining the operation of the cold air distribution device according to the present invention,

8 is a side cross-sectional view of a refrigerator having a conventional cold air distribution device,

9 is an enlarged partial view of FIG. 8;

10 is an exploded perspective view of a conventional cold air distribution device.

* Explanation of symbols for main parts of the drawings

2,3 Cooling chamber 5: Intermediate bulkhead

6,7: Door 12a, 12b: Evaporator

13a, 13b: cooling chamber fan 15: cold air duct

16: cold air outlet 20: duct housing

21: duct member 30: cold air distribution device

31: rotating shaft 33: cold air distribution wing

35: drive motor 40: cold air grill member

50: drive unit 51: drive member

53: linking member 57: driven part

60: electric drive 61: elastic detail

63: fixing part 65: damper part

67: connecting rod 69: casing

According to the present invention, in the refrigerator having a cooling chamber for cooling and storing food, the cold air is provided on one side wall of the cooling chamber to guide the flow of cold air and has a cold air outlet opening toward the cooling chamber. Ducts; At least one cold air distribution wing having an axis parallel to the front of the cold air discharge port; A rotating shaft rotatably installed in the cold air duct at a rear side of the cold air distribution blade; A drive motor for rotating the rotating shaft; Transmission means disposed between the cold air distribution blade and the rotary shaft to convert the rotational movement of the rotary shaft into a rotational movement in a predetermined one direction of the cold air distribution blade, and the cold air distribution moved in one direction by the transmission means. It is achieved by a refrigerator comprising biasing means for returning the cold air distribution wing to the initial position by elastically biasing the wing in the other direction.

Here, the transmission means, the action projection protruding in the axial direction of each of the cold air distribution blades; A driving member rotatably coupled to the rotation shaft and having an extension protrusion extending in one radial direction in the axial direction; A transmission member disposed horizontally in the axial direction of the cold air distribution blade so as to oscillate each of the action protrusions, the transmission member having a driven portion extended to partially contact the driving member in a rotation plane of the driving member; It is desirable to.

And, the biasing means, the fixing portion fixed to the side of the movement direction of the transmission member on one side of the cold air distribution blade; A coupling rod penetrating the fixed portion and coupled to the transmission member; A casing penetrating through the coupling rod and movable along the longitudinal direction; A support plate slidable in the casing and fixed to the free end of the connecting rod; It is more effective to include an elastic spring interposed between the support plates in the casing.

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

1 is a front sectional view of a refrigerator having a cold air distribution device according to the present invention. The refrigerator 1 having the present cold air distribution device is divided into a freezer compartment 2 and a refrigerating compartment 3 by an intermediate partition 5 in a substantially rectangular body, as described with reference to FIGS. 8 to 10. A pair of cooling chambers is provided, and opening / closing doors 6 and 7 are provided on the opening fronts of the respective cooling chambers 2 and 3, respectively.

The refrigerator compartment 3 is provided with a plurality of shelves 8 for placing food to partition the refrigerator compartment 3 into a plurality of food storage areas in the vertical direction. In the upper side of the refrigerating chamber 3, a special refrigerating chamber 18 for storing food suitable for a specific temperature range is formed, and the lower side of the refrigerating chamber 3 is provided with a vegetable chamber 19 for storing vegetables.

In the main body 4, a compressor 11, a condenser, a freezer compartment evaporator 12a, and a refrigerator compartment evaporator 12b, which are not shown, are installed to perform a refrigeration cycle, and cold air is generated in each of the evaporators 12a and 12b. A freezer compartment fan 13a and a refrigerating compartment fan 13b are installed above the evaporators 12a and 12b to forcibly blow cold air generated in each of the evaporators 12a and 12b to the freezer compartment 2 or the refrigerator compartment 3.

A cold air duct 15 is formed in the rear wall surface of the refrigerating chamber 3, and the cold air duct 15 is formed with a cold air discharge port 16 opened toward the refrigerating chamber 3. The cold air duct 15 is provided in the cold air duct 15, and the cold air blown into the cold air duct 15 by the refrigerator compartment fan 13b is supplied into the cold compartment 3 through the cold air distribution device 30. . At the rear of the cold air duct 15, a circulation duct 17 connecting the refrigerating chamber 3 and the refrigerator compartment evaporator 12b is formed to be isolated from the cold air duct 15. The cold air which cooled the refrigerator compartment 3 returns to the refrigerator compartment evaporator 12b through this circulation duct 15. As shown in FIG.

FIG. 2 is a side cross-sectional view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. 2, specifically showing a duct housing in which a cold air distribution device according to the present invention is installed. As can be seen in the drawing, the duct housing 20 forms a cold air duct 15 to guide the cold air insulated, and the front plate 23 attached to the front surface of the duct member 21. ), The seal plate 25 adhered to the rear surface of the duct member 21, and the partial cylindrical cold air grill member 40 installed in a form surrounding the cold air distribution device 30 in front of the front plate 23. It is composed of

The cold air discharge openings 16 which are opened toward the refrigerating chamber 3 are provided in the cold air grill member 40 at predetermined intervals along the longitudinal direction. The cold air distribution device 30 is rotatably supported by the front plate 23. The front plate 23 and the duct member 21 form a cold air duct 15 for guiding the flow of cold air therebetween, and has an accommodating portion (not shown) for accommodating a portion of the cold air distribution device 30. The cold air ducts 15 are provided with opposite cold air flow passages on both sides of the cold air distribution device 30 rotatably installed along the longitudinal direction thereof. The cold air grill member 40 coupled to the front plate 23 and surrounding the cold air distribution device 30 is provided with a plurality of cold air discharge ports 16 along the vertical direction.

On the other hand, Figure 4 is an exploded perspective view of the cold air distribution device according to the present invention. The cold air distribution device 30 includes a plurality of cold air distribution blades 33 having axes parallel to the vertical direction in the cold air duct, and a drive unit 50 which rotates the cold air distribution blades 33 left and right. Each cold air | distribution blade 33 has a substantially flat plate shape, and the rotation shaft 34 extended in the axial direction from the both ends is formed. Correspondingly, the upper and lower edge portions of the cold air grill member 40 are provided with flange portions 43 in the direction perpendicular to the plate surface, respectively, and the pivot shaft holes 45 have a predetermined interval along the longitudinal direction of the flange portion 43. ) Is provided. The rotating shaft 34 of the cold air distribution wing 33 is rotatably accommodated in the left and right directions in a pair of upper and lower rotating shaft holes 45 facing each other. Each cold air distribution wing 33 is further provided with a working projection 37 projecting laterally in the axial direction from its upper end region.

The drive unit 50 includes a rotation shaft 31 rotatably provided on the rear side of the cold air distribution blade 33 in the cold air duct, a drive motor 35 for rotating the rotation shaft 31, and a rotation shaft 31. ) Is disposed between the drive motor 35 and the driving motor 35 to convert the rotational movement of the rotary shaft 31 into the rotational movement of the cold air distribution blade 33. The electric motor 60 has a cold air distribution blade. It is disposed between the actuating protrusion 37 formed on the 33, the driving member 51 rotatably installed on the rotation shaft 31, and the actuating protrusion 37 and the driving member 51. It includes a transmission member 53. The transmission member 53 has a partial disk shape, and a plurality of hinge holes 55 are formed at predetermined intervals along the longitudinal direction thereof. These hinge holes 55 are accommodated in the actuating projection 37 formed in the cold air distribution blade 33 so as to be swingable.

On the other hand, the drive member 51 has a plate-shaped rectangular bar shape, and the rotating shaft hole through which the rotating shaft 31 penetrates is eccentric to one side. Thus, the drive member 51 supported by the rotation shaft 31 has an extension protrusion extending in the horizontal direction on the rotation axis. On the other hand, the driven member 57 is provided with the driven part 57 fixedly installed toward the drive member 51. The driven portion 57 is spaced apart from the end region, and partially comes into contact with the transmission member 53 in a predetermined rotational plane formed by the drive member 51 during rotation of the rotation shaft 31. At this time, the transmission member 53 is moved along the rotational direction of the drive member 51, thereby enabling the rotation of the plurality of cold air distribution wings 33 hinged to the transmission member 53.

The drive motor 35 is housed in the motor case at the upper portion of the front plate 23, it is preferable to use a stepping motor capable of forward and reverse rotation and control the stop angle position. The drive motor 35 in this embodiment is configured to rotate in one direction at a predetermined speed, and thus the drive member 51 coupled to the rotation shaft 31 also rotates in only one direction. The drive motor 35 is also stopped at a predetermined position by a control signal of a controller (not shown). On both sides of the drive motor 35, a lamp for a refrigerator compartment lighting (not shown) flashing in conjunction with opening and closing of the refrigerator compartment door 7 is provided, and a lamp cover is attached to the lamp.

The transmission portion 60 further has an elastic bias portion 61 which elastically biases the transmission member 53 moving in one direction in contact with the driving member 51 rotating in one direction. The elastic bias portion 51 is fixed to the one side edge of the cold air grill member 40 horizontally fixed to the moving direction of the transmission member 53, and in a state supported on the outside of the fixing portion 63 It has a damper portion 65 that is coupled to the transmission member (53). The damper portion 65 includes a coupling rod 67 penetrating the fixing portion 63 and coupled to the transmission member 53, a casing 69 penetrating the coupling rod 67 and movable along the longitudinal direction, and a casing. It is composed of a support plate (73) which is slidable within and fixed to the free end of the coupling bar (67), and an elastic spring (71) interposed between the support plate (73) in the casing.

A male screw portion 75 is formed at the end of the coupling rod 67, and a female screw portion to which the male screw portion 75 is fastened is provided at the transmission member 53, and the coupling rod 67 is fixedly coupled to one side in the transmission portion. Can be. In the fixing portion 63 in which the upper outer surface of the casing 69 is in contact with each other, a depression 64 is formed which enables the supported casing 69 to swing. In addition, the elastic spring 71 serves to elastically bias the transmission member 53 moving in the rotational direction of the fixing member 51 in the opposite direction, and the support plate 73 is in contact with the inner wall surface of the casing 69. It serves to cushion the sudden return of the transmission member (53).

With this configuration, FIGS. 5 to 7 are cross-sectional views of the coupled state of FIG. 4, which illustrate the operation of the cold air distribution device 30 according to the present invention. As described above, the driving motor 35 is rotated 360 ° in one direction. By the rotation of the rotary shaft 31, the drive member 51 is rotated to form a horizontal plane of rotation. On the other hand, each of the cold air distribution wings 33, by the spring force of the elastic urging portion 61, as shown in Figure 5, is disposed while maintaining the initial state toward one side. At this time, the rotating driving member 51 is partially in contact with the driven portion 57 of the transmission member 53 in the rotational plane, and the transmission member 53 is driven by the rotational force of the driving member 51. The driving member 51 is gradually moved in the rotational direction.

Accordingly, each cold air distribution wing 33 hinged to the transmission member 53 is rotated at the front surface of the cold air discharge port 16. FIG. 6 shows the cold air distribution wing 33 in a state parallel to the cold air flow direction. FIG. 7 shows a state where the cold air distributing blade 33 is disposed in a state where the driven part 57 of the driving member 51 and the transmission member 53 is almost spaced apart. At this time, the cold air discharged from the cold air duct is uniformly guided into the refrigerating chamber according to the rotation angle position of the cold air distribution blade 33.

When the cold air distribution wing 33 is rotated in this way, the restoring force of the elastic bias portion 61 acts on the transmission member 53. Therefore, when the driven part 57 of the drive member 51 and the transmission member 53 is mutually spaced apart, the transmission member 53 will return to an initial position. At this time, the casing 69 and the support plate 73 inside the casing are in contact with each other in the elastic urging portion 61, thereby restoring the restoration of the transmission member 53, whereby the transmission member 53 Will return at a predetermined speed that is not excessive. As a result, uniform distribution of the discharged cold air is achieved according to the rotational angle position of the cold air distribution blade 33 to be returned to rotation.

As described above, in the refrigerator having the cold air distribution device according to the present invention, no vortices are generated around the cold air discharge port, and thus the cold air distribution device can operate well, thereby cooling by uniform distribution of the cold air distribution device. The excellent effect of achieving effective concentrated cooling while eliminating the sand dune area of the room is provided.

Claims (7)

(correction) In the refrigerator having a cooling chamber for cooling and storing food, A cold air duct installed at one side wall of the cooling chamber to guide the flow of cold air and having a cold air discharge opening opened toward the cooling chamber; At least one cold air distribution wing having an axis parallel to the front of the cold air discharge port; A rotating shaft rotatably installed in the cold air duct at a rear side of the cold air distribution blade; A drive motor for rotating the rotating shaft; Transmission means disposed between the cold air distribution blade and the rotary shaft to convert the rotational movement of the rotary shaft into a rotational motion in a predetermined one direction of the cold air distribution blade; And biasing means for returning the cold air distribution wing to its initial position by elastically biasing the cold air distribution wing moving in one direction by the transmission means in the other direction. (delete) (correction) The method of claim 1, The transmission means, A working projection projecting horizontally in the axial direction of each of the cold air distribution blades; A driving member rotatably coupled to the rotation shaft and having an extension protrusion extending in one radial direction in the axial direction; A transmission member disposed horizontally in the axial direction of the cold air distribution blade so as to oscillate each of the action protrusions, the transmission member having a driven portion extended to partially contact the driving member in a rotation plane of the driving member; Refrigerator characterized in that. (delete) (correction) The method according to claim 1 or 3, The taxation means, A fixing part fixed to one side of the cold air distributing blade horizontally in a moving direction of the transmission member; A coupling rod penetrating the fixed portion and coupled to the transmission member; A casing penetrating through the coupling rod and movable along the longitudinal direction; A support plate slidable in the casing and fixed to the free end of the connecting rod; And an elastic spring interposed between the support plates in the casing. (delete) (delete)

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