KR100229482B1 - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator having a cooling chamber, comprising: a cold air duct provided on one side wall of the cooling chamber to guide the flow of cold air and having a cold air discharge port opened toward the cooling chamber; A drive shaft rotatably disposed at the rear of the cold air duct with a plurality of working protrusions protruding radially with respect to the axial direction; A drive motor for rotating the drive shaft; Disposed between the cold air discharge port and the drive shaft with a cam groove that is corrugated with respect to the rotational plane of the actuating protrusions so as to be continuously accommodated within at least a part of the rotation angle range, and received and separated from the cam groove. It characterized in that it comprises a plurality of cold air distribution wings swinging in the vertical direction by the rotational movement of the action projections. As a result, vortex phenomena are eliminated around the discharge port, and uniform cold distribution in the vertical direction in the cooling chamber and concentrated cooling of a specific region can be achieved if necessary.

Description

Refrigerator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and to a refrigerator having a cold air distribution device for uniformly distributing cold air in a refrigerating chamber.

A refrigerator having a conventional cold distribution device is proposed in PCT application WO 95/27278 by the applicant of the present invention, and FIGS. 11 to 13 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 including a compressor 11, a condenser and a freezer compartment evaporator 12a and a refrigerator compartment evaporator 12b (not shown) is installed. The cold air generated in each of the evaporators 12a and 12b is supplied to each cooling chamber by the freezing chamber fan 13a or the refrigerating chamber 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 driving shaft 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 divide 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 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 the conventional refrigerator 101 having such a cold air distribution device 110, the cold air discharged from the cold air duct 15 flows along the wing portions 117 and 119 having a S-shaped cross section. 16) there is a problem that the vortex is generated around, and this vortex acts as a load on the cold air distribution device 110 to limit the smooth operation. The conventional cold air distribution device 110 that distributes cold air in the refrigerating chamber in a horizontal direction has a limit in maintaining the inside of the refrigerating chamber in a uniform cooling state, and thus a temperature deviation occurs in the refrigerating chamber.

Accordingly, an object of the present invention, in view of the above problems in the prior art, the vortex phenomenon occurring around the cold air discharge port can be eliminated and can operate well, by realizing the cold air distribution in the vertical direction in the refrigerating chamber effectively cooling the inside of the cooling chamber effectively It is to provide a refrigerator having a cold air distribution device to enable.

Another object of the present invention is to provide a refrigerator having a cold air distribution device capable of achieving concentrated cooling in a refrigerating chamber, if necessary.

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

4 is a plan view of the cold air distribution wing,

5 is a rear view of FIG. 4;

6 to 8 is an operating state of the assembled state of FIG.

9 is a cross-sectional view of a cold air distribution device according to another embodiment of the present invention;

10 is a partial longitudinal cross-sectional view of FIG. 9;

11 is a side sectional view of a refrigerator having a conventional cold air distribution device,

12 is a partially enlarged view of FIG. 10;

13 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 9a, 9b: temperature sensor

12a, 12b: Evaporator 13a, 13b: Blowing fan

15: cold air duct 16a, 16b, 16C: cold air discharge

25: duct cover 30, 61: cold air distribution device

33: cold air distribution wing 35: front projection

36: back cutting part 39: rotating pin

41: cut back 43a, 43b, 65: cam groove

45: drive motor 53, 63: action projection

According to the present invention, a refrigerator having a cooling chamber, comprising: a cold air duct provided on one side wall of the cooling chamber to guide a flow of cold air and having a cold air outlet opening toward the cooling chamber; A drive shaft rotatably disposed at the rear of the cold air duct with a plurality of working protrusions protruding radially with respect to the axial direction; A drive motor for rotating the drive shaft; Disposed between the cold air discharge port and the drive shaft with a cam groove that is corrugated with respect to the rotational plane of the actuating protrusions so as to be continuously accommodated within at least a part of the rotation angle range, and received and separated from the cam groove. It is achieved by a refrigerator characterized in that it comprises a plurality of cold air distribution wings swinging in the vertical direction by the rotational movement of the action projections.

Wherein the cold air distribution wing has an arcuate cut; The cam groove is formed on the cutting surface of the cutting portion; It is effective that the drive shaft is arranged concentrically with the cut portion on the arc.

Each of the cold air distribution blades has a pair of cam grooves whose inlet side is spaced a predetermined distance along the axial direction of the drive shaft; Preferably, the driving shaft is provided with a working protrusion spaced at a predetermined angle in the axial direction and the circumferential direction corresponding to the pair of cam grooves. In addition, the pair of cam grooves may be configured to approach each other in the central region between the inlet side and the outlet side.

On the other hand, the cold air duct, a duct cover having a cold air discharge port; The duct cover may be configured to have a duct member spaced apart from each other so as to form a cold air flow path. And, both ends of the cold air distribution wing has a rotating shaft provided along the axial direction; It is advantageous that the support portion for rotatably receiving the pivot shaft is fixed to the inner wall surface of the duct cover.

In addition, the cold air distribution wing is more effective that the front edge has an arcuate planar edge.

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, Figure 2 is a side sectional view of FIG. As can be seen from these figures, the refrigerator 1 having the present cold air distribution device 30 is formed by an intermediate partition 5 in a substantially rectangular main body, as described with reference to FIGS. 11 to 13. A pair of cooling chambers divided into a freezing chamber 2 and a refrigerating chamber 3 are provided, and opening and closing doors 6 and 7 are respectively provided on the front surfaces of the openings of the respective cooling chambers 2 and 3. The refrigerator compartment 3 is provided with a plurality of shelves 8 for placing food therein and partitioned into a plurality of food storage zones along the vertical direction of the refrigerator compartment 3. The special refrigeration chamber 18 used for storing the food suitable for a specific temperature range is formed in the upper side of the refrigerating chamber 3, and the vegetable chamber 19 for storing vegetables is formed in the lower side of the refrigerating chamber 3. As shown in FIG.

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.

The cold air duct 15 is provided in the rear wall surface of the refrigerating chamber 3. The cold air duct 15 is comprised by the duct cover 21 and the duct cover 25 which is couple | bonded with the front surface of this duct member 21, and forms the predetermined | prescribed cold air flow path between them, In the duct cover 25, Cold air discharge ports 16a, 16b, and 16c opened toward the refrigerating chamber 3 are formed. The cold air discharge ports 16a, 16b, and 16c are provided three along the up-down direction corresponding to the storage area in the refrigerator compartment. The cold air distribution device 30 is provided in the region adjacent to the cold air discharge ports 16a, 16b, and 16c in the cold air duct 15. The cold air blown into the cold air duct 15 by the cold room fan 13b is supplied into the cold room 3 via 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 via this circulation duct 17. As shown in FIG.

3 is an exploded perspective view of a cold air distribution device according to the present invention. The cold air distribution device 30 includes a plurality of cold air distribution blades 33 rotatably installed on the front surface of the cold air discharge ports 16a, 16b, and 16c, and horizontally on the axis of the cold air distribution wing 33. A drive shaft 51 rotatably disposed over the 33, a drive motor 45 for rotationally driving the drive shaft 51, and interposed between the drive shaft 51 and the cold air distribution blade 33, respectively, 51 is provided with the transmission part 53 which converts the rotational motion of 51 into the rocking motion in the predetermined angle range of the cold air | distribution vane 33. As shown in FIG.

As can be seen in FIG. 4, the cold air distribution wing 33 has a front projection 35 and a back cutout 36 formed corresponding to the cold air discharge ports 16a, 16b, 16c. The protruding portion 35 is formed in an arc shape having a gentle front edge, and the cutout portion 36 is also cut in an arc shape so as to correspond to the cylindrical surface of the drive shaft 51. And the rear edge which interposed the cutout part 36 protrudes back with respect to an axis line, and forms the gentle curve. On the other hand, the upper and lower pairs of cam grooves 43a and 43b are provided on the cut back surface 41 formed by cutting the rear of the cold air distribution blade 33 along the longitudinal direction. These cam grooves 43a and 43b have a wave shaped camp profile for raising and lowering the width direction of the cutting surface, and a working protrusion to be described later is accommodated and slides along the longitudinal direction thereof.

FIG. 5 is a rear view of FIG. 4, in which the upper and lower pairs of cam grooves 43a and 43b are shown in detail. As can be seen from the figure, the mutually opposing cam grooves 43a and 43b have both inlet and outlet regions spaced apart by a predetermined distance along the axial direction of the drive shaft 51, and the center between these inlet and outlet sides. The area is approached almost closely. Between these mutually approached cam grooves 43a and 43b are partitioned by a blocking wall along its longitudinal direction, whereby a pair of up and down movement paths are formed. At both ends of the cold air distribution wing 33, rotation pins 39 extending laterally are provided, respectively.

On the other hand, the duct cover 25 having the cold air discharge ports 16a, 16b, and 16c is provided with flange portions 27 extending in the orthogonal direction from the back at both longitudinal longitudinal edges thereof, and cold air is provided in these flange portions 27. The rotation hole 29 which accommodates the rotation pin 39 of the distribution blade 33 is provided so that it may mutually oppose. The cold air distribution blades 33 in which the two rotating pins 39 are respectively accommodated in the opposing rotating holes 29 are rotatable vertically in front of the cold air discharge ports 16a, 16b, and 16c. Each cold air discharge port 16a, 16b, 16c is provided with a pair of cold air distribution blades 33 having parallel axes in the horizontal direction.

The drive shaft 51 has a substantially cylindrical shape, and the upper and lower rotary pins 55a and 55b extend in the axial direction, respectively, and are disposed in the vertical direction in the cold air duct. The drive shaft 47 of the drive motor 45 is coupled to the upper rotary pin 55a, and the lower rotary pin 55b is rotatable in the rotary shaft hole 28 provided in the lower flange portion 26 of the duct cover 25. Will be accepted. The drive shaft 51 rotatably supported by the drive motor 45 and the rotary shaft hole 28 is accommodated in an arcuate cut portion of the cold air distribution blade 33 and arranged concentrically.

On the other hand, the transmission part 53 is provided in multiple numbers along the axial direction by the action protrusion which protruded radially on the outer surface of the drive shaft 51. As shown in FIG. A pair of adjacent working protrusions among these working protrusions 53 correspond to a pair of cam grooves 43a and 43b provided on each of the cold air distribution wings 33, and in the axial direction and the circumferential direction of the drive shaft 51. The predetermined angle is also spaced apart. That is, the separation distance in the axial direction is the same as the inlet or outlet side separation distance of the pair of cam grooves 43a and 43b, and is 180 degrees apart in the circumferential direction. Each pair of actuating protrusions 53 is provided in three pairs along the axial direction of the drive shaft 51, equal to the number of cold air distribution blades 33.

Accordingly, when the drive shaft 51 is rotated, the actuating protrusions 53 in the up and down directions are sequentially inserted into the inlet of the upper and lower cam grooves 43a and 43b of the cold air distribution blade 33, and the drive shaft 51 It moves along the camp profile in the direction of rotation and eventually breaks out. At this time, the rear edge of the cold air distribution blade 33 is projected to the rear side with respect to the axis line so that at least one working projection 53 is always accommodated in the cam groove. The rotation of the drive shaft 51 allows the cold air distribution blade 33 to be rotated up and down within a predetermined rotation angle range. On the other hand, the drive motor 45 is housed in a motor case (not shown) and fixedly installed at the upper portion of the cold air duct 15. Such drive motor 45, it is preferable to use a stepping motor capable of forward and reverse rotation and control the stop angle position.

By this configuration, Figures 6 to 8 is an operating state diagram of the assembled state of FIG. The cold air distribution device 30 is driven by a stepping motor 45 which is operated and controlled in accordance with an output signal from a controller (not shown). When the drive shaft 51 is rotated by the forward and reverse driving of the stepping motor 45, the action protrusions 53 provided along the axis rotate to form a horizontal rotation plane, respectively. The upper working protrusion 53 of the rotating working protrusion 53 is moved along the upper cam groove 43a provided on the rear surface of the cold air distributing wing 33, and the lower working protrusion 53 is the lower cam groove ( 43b).

For example, the state in which the lower action protrusion 53 is accommodated in the inlet side of the upper cam groove 43a is shown in FIG. At this time, the cold air distribution wing 33 is arranged in the horizontal direction, and thus the cool air from the cold air duct 15 is guided in the horizontal direction is discharged into the refrigerating chamber. And, these cold air distribution wings 33, when the upper actuating projection 53 is moved along the upper cam groove 43a to be separated, and the lower actuating projection 53 is the inlet side of the lower cam groove 43b. It is arranged in the horizontal direction when accommodated in the and also to be separated from the exit side.

On the other hand, when the lower working projection 53 moves along the lower cam groove 43b, the cold air distributing blade 33 is gradually rotated downward, and the moment reaching the central region of the cam groove 43b, FIG. It will be placed in the maximum downward state as seen in. At this time, cold air from the cold air duct 15 is discharged downward in the refrigerating chamber. Then, when moving from the central region to the exit side, the cold air distribution blade 33 gradually returns to its original state, and the upper working protrusion 53 is placed in the upper cam groove 43a before being separated from the lower cam groove 43b. Will be accepted. When the upper action protrusion 53 moved along the upper cam groove 43a is disposed in the central region, the cold air distributing wings 33 are arranged in the upwardly upward rotation state as shown in FIG. 8. At this time, cold air from the cold air duct 15 is discharged to the upper portion of the refrigerating chamber 3. Then, when moving from the central region to the exit side, the cold air distribution blade 33 is returned to its original state.

As such, the actuating protrusion 53 is sequentially accommodated in the upper and lower cam grooves 43a and 43b of the cold air distributing blade 33 by the continuously rotating drive shaft 51, and thus the cold air distributing blade 33 is upward and downward. While rotating, the cold air from the cold air duct 15 is uniformly guided to the upper and lower parts of the refrigerating chamber. Therefore, the cooling state can be maintained uniformly in the refrigerating chamber.

On the other hand, in the refrigerating chamber, temperature sensing sensors 19a and 19b are provided in plural places. These sensors 19a and 19b sense the temperature in the refrigerating compartment and generate a detection signal to the controller, and the controller applying the detection signal determines the degree of temperature deviation in the refrigerating compartment. Therefore, when the temperature deviation becomes a predetermined value or more, the control signal is output to the driving motor 45, and the cold air distribution blade 33 is stopped so that the cold air can be concentrated in the corresponding area.

On the other hand, Figure 9 is a cross-sectional view of the cold air distribution device according to another embodiment of the present invention, Figure 10 is a longitudinal cross-sectional view of FIG. The cold air distribution device 61 according to the present embodiment has the same shape and the same number of drive shafts 51 and cold air distribution wings 33 as the above-described embodiment. A screw cam cam 65 corresponding to the cold air distribution blade 33 is provided along the axial direction, and a working projection protruding to be accommodated in the cam groove 65 on the cut surface of each cold air distribution blade 33. 63 is formed. Then, the drive motor 45 for rotating the drive shaft 51 is configured to forward and backward drive by the control signal of the controller.

By this configuration, when the drive shaft 51 is rotated in one direction, the actuating projection 63 of the drive shaft 51 accommodated in the cam groove is raised or lowered along the axial direction. At this time, the cold air distribution wing 33 rotates to the upper side or the lower side. Accordingly, the discharge cold air is guided into the refrigerating chamber according to the rotation angle of the cold air distribution blade 33. On the other hand, when the drive shaft 51 is rotated in the other direction, the cold air distribution blade 33 is rotated to the opposite side to guide the discharge cold air. Since the forward and reverse rotation of the drive shaft 51 proceeds continuously under the control of the controller, uniform cooling is performed in the refrigerating chamber. And when a temperature deviation generate | occur | produces in a refrigerator compartment, a control part can achieve intensive cooling in a refrigerator compartment by stopping rotation of the drive shaft 51 to a predetermined position.

Meanwhile, in the above-described and illustrated embodiments, the cold air distribution device 30 is installed in the refrigerating chamber 3 for ease of explanation, but the cold air distribution device 30 similar to the above is also described in the freezing chamber 2. Of course it can be achieved by installing the same purpose described above.

As described above, according to the present invention, there is provided a cold air distribution device capable of performing a good operation by removing the vortex shape around the discharge port. In such a cold air distributing device, by vertically rotating the cold air distributing blade, it is possible to achieve cold air distribution in the vertical direction in the cooling chamber, thereby realizing effective uniform cooling. In addition, a refrigerator having an excellent effect of achieving concentrated cooling by stopping the cold air distribution blades so that cold air is discharged only to a specific region when necessary is provided.

Claims (7)

In the refrigerator having a cooling chamber, A cold air duct provided on one side wall of the cooling chamber to guide the flow of cold air and having a cold air discharge port opened toward the cooling chamber; A drive shaft rotatably disposed at the rear of the cold air duct with a plurality of working protrusions protruding radially with respect to the axial direction; A drive motor for rotating the drive shaft; Disposed between the cold air discharge port and the drive shaft with a cam groove that is corrugated with respect to the rotational plane of the actuating protrusions so as to be continuously accommodated within at least a part of the rotation angle range, and received and separated from the cam groove. And a plurality of cold air distribution vanes swinging in the vertical direction by the rotational movement of the action protrusions. The method of claim 1, The cold air distribution wing has an arcuate cut; The cam groove is formed on the cutting surface of the cutting portion; And the drive shaft is arranged concentrically with the arcuate cutout. The method of claim 2, Each of the cold air distribution blades has a pair of cam grooves whose inlet side is spaced a predetermined distance along the axial direction of the drive shaft; The drive shaft is a refrigerator, characterized in that formed in the driving shaft spaced apart by a predetermined angle in the axial direction and the circumferential direction corresponding to the pair of cam grooves. The method of claim 3, And the pair of cam grooves approach each other in a central region between the inlet side and the outlet side. The method of claim 1, The cold air duct, A tuck cover having a cold air outlet; And a duct member spaced apart from each other so as to form a cold air flow path between the duct cover and the duct cover. The method according to claim 3 or 5, Both ends of the cold air distribution blades have a rotation shaft provided along the axial direction; And a support portion rotatably holding and supporting the pivot shaft on an inner wall surface of the duct cover. The method of claim 6, The cold air distribution wing is a refrigerator, characterized in that the front edge has an arc-like flat edge.

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