KR20030068930A - Refrigerator - Google Patents

Abstract

PURPOSE: A refrigerator is provided to allow chilled air to smoothly flow from a freezer compartment to a refrigerator compartment by minimizing pressure loss due to a damper. CONSTITUTION: A damper unit(30) includes a boxy case(31) mounted on an inner upper side of a refrigerator compartment side chilled air channel(20) neighboring an outlet of a connecting channel(24), and having an upper end and a lower end opened for flowing of chilled air; a platy damper(32) having one side joined to an upper part of the case to rotate so as to open and close the outlet of the connecting channel; and a step motor(34) joined to a rotary axis(33) of the damper to rotate the damper in normal direction and reverse direction so as to open and close the outlet of the connecting channel, and laid on an upper part of the chilled air channel on an outside of the case. The step motor rotates the damper in normal direction and reverse direction to control opening degree of the outlet of the connecting channel so as to control temperature in a refrigerator compartment.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator, and more particularly, to a refrigerator provided between a freezer compartment cold air passage and a refrigerating compartment cold air passage to smoothly flow the cold air from the freezer compartment to the refrigerating compartment through an improvement of a damper device for adjusting the opening degree of the flow path. .

In a typical refrigerator, an internal storage compartment is divided into an upper freezer compartment and a lower refrigeration compartment, and an evaporator is installed at an inner rear side of the freezer compartment to generate cold air. Cold air passages are formed at the inner rear of the freezer compartment and the refrigerating compartment for guiding the cold air, and inside the freezer passage, the air of the freezer compartment and the refrigerating compartment exchanges heat with the evaporator, and is then supplied to the freezer compartment and the refrigerating compartment through the respective cold air passages. A cold air circulation fan is installed to force cold air to circulate.

In addition, a communication flow path is formed between the freezing compartment cold air flow path and the cold storage compartment cold air flow path so that the cold air from the freezer compartment flows into the cold air flow path to the refrigerating compartment. A damper device is installed to control the amount of cold air flowing through the freezer compartment from the freezer compartment to properly maintain the temperature of the refrigerator compartment.

As shown in Fig. 1, the damper device includes a plate-shaped damper 3 rotatably mounted above the refrigerating chamber side cold air passage 2 so as to open and close the outlet side of the communication passage 1, and the damper 3. It includes a conventional step motor (4) coupled to the rotary shaft (3a) of the damper (3) to rotate the forward or reverse to adjust the opening degree of the communication passage (1). This configuration allows the damper 3 to rotate in the forward direction and the reverse direction through the driving of the step motor 4 to adjust the opening degree of the flow path so that the flow rate of the cold air toward the refrigerating compartment can be properly maintained.

However, the damper device of the conventional refrigerator has a rear side of the damper 3 when cold air flows from the communication flow passage 1 to the cold storage channel side 2 in the refrigerating chamber in a state where the damper 3 is opened in a predetermined amount as shown in FIG. 1. Since the vortex is formed in the space 5, there is a problem that the cold air flow to the cold storage channel 2 in the refrigerating chamber is not smooth. That is, due to the vortex generated at the rear of the damper (3), the pressure loss occurs, the flow of cold air was not smooth.

The present invention is to solve such a problem, an object of the present invention is to prevent the vortex generated in the rear of the damper for adjusting the opening degree of the cold air flow path to minimize the pressure loss due to the damper to the flow of cold air from the freezer side to the cold compartment It is to provide a refrigerator so that this can be made smoothly.

1 is a cross-sectional view showing the configuration of a damper device of a conventional refrigerator.

2 is a cross-sectional view showing the overall internal configuration of the refrigerator according to the present invention.

3 is a cross-sectional view showing the configuration of a refrigerator damper device according to the present invention.

4 is a cross-sectional view showing the configuration of a refrigerator damper device according to the present invention, showing a state in which the damper is completely open.

5 is a perspective view showing the configuration of a refrigerator damper device according to the present invention.

Explanation of symbols on the main parts of the drawings

10: main body, 11: freezer,

12: refrigerator compartment, 15: evaporator,

16: cold air circulation fan, 18: cold air flow path in the freezer compartment,

20: cold air flow path in the refrigerating chamber, 22: middle wall,

24: communication euro, 25: cold return euro,

30: damper device, 31: case,

32: damper, 34: step motor,

35: extension part, 36: receiving groove.

Refrigerator according to the present invention for achieving this object, a damper device comprising a damper rotatably coupled to the middle of the cold air flow path for adjusting the opening degree of the cold air flow path, and a motor for rotating the damper in the forward and reverse directions A refrigerator comprising: an extension portion which is bent from the free end of the damper to the rear of the damper and extends a predetermined length so that no vortex is generated at the rear of the damper when cold air flows in a state where the damper is opened in a predetermined amount. It is characterized by.

In addition, the inner surface of the cold air flow path is characterized in that the receiving groove recessed to a predetermined depth so that the extension is accommodated when the damper is opened.

In addition, the extension is characterized in that the bent to perpendicular to the damper.

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

As shown in FIG. 2, the refrigerator according to the present invention has a freezing compartment 11 formed at an inner upper portion of the main body 10 and a refrigerating chamber 12 formed at a lower portion thereof, and a front surface of the freezing chamber 11 and the refrigerating chamber 12. The freezing chamber door 13 and the refrigerating chamber door 14 which open and close these are provided in each.

In addition, a normal evaporator 15 for generating cold air is provided at an inner rear side of the freezer compartment 11, and a cold air circulation fan forcibly circulating internal air of the freezer compartment 11 and the refrigerating compartment 12 at the upper part of the evaporator 15. 16 is installed.

In addition, an inner side plate 17 is provided at an inner rear side of the freezing compartment 11 to partition an inner space of the freezing compartment 11 and a space in which the evaporator 15 is installed, and an inner side plate 17 and a rear side of the inner side plate 17. A box-type cold air duct 19 is formed to form a freezer compartment side cold air flow passage 18 together. In addition, a plurality of cold air discharge ports 17a are formed in the inner plate 17 of the freezing compartment 11 so that the cold air guided through the cold air passage 18 may be supplied into the freezing compartment 11.

In the refrigerating chamber 12, an inner plate 21 is installed at an inner rear side to form a refrigerating chamber side cold air passage 20 associated with the freezer compartment side cold air passage 18, and a plurality of cold air discharge ports 21 a are provided in the inner plate 21. ) Is formed.

The intermediate wall 22 partitioning the freezer compartment 11 and the refrigerating compartment 12 has a communication passage 24 for communicating the freezer compartment side cold air passage 18 and the refrigerating compartment side cold air passage 20, and the freezer compartment 11 and the refrigerating compartment ( The cold air return passage 25 is formed so that the cold air supplied to 12 is returned to the evaporator 15 again.

And the outlet side of the communication passage 24 to adjust the amount of cold air flowing from the freezer compartment 11 side to the refrigerating chamber 12 through the opening and closing of the communication passage 24 to ensure that the temperature of the refrigerating chamber 12 is properly maintained Damper device 30 is installed.

3 and 5, the damper device 30 is mounted on the inside upper side of the refrigerating chamber side cold air passage 20 adjacent to the outlet of the communication passage 24, and the upper and lower ends are opened for the flow of cold air. In order to open and close the exit of the box-shaped case 31 and the communication passage 24, the plate-shaped damper 32, the damper 32, one side of which is rotatably coupled to the upper portion of the case 31, It is coupled to the rotary shaft 33 of the damper 32 to rotate in the reverse direction to open and close the outlet of the communication passage 24 and includes a step motor 34 embedded in the cold air flow passage 20 outside the case 31. do. This configuration allows the damper 32 to rotate in the forward and reverse directions through the driving of the step motor 34 so that the opening degree of the communication passage 24 can be adjusted. At this time, the operation of the step motor 34 is controlled by a conventional refrigerator control unit (not shown), and by appropriately driving in the forward and reverse directions by rotating the damper 32 according to the set temperature of the refrigerating chamber 12 is high or low. The opening degree of the communication flow path 24 is adjusted, and through this, the temperature of the refrigerating chamber 12 is appropriately maintained.

In addition, the damper device 30 according to the present invention prevents the vortex from being generated behind the damper 32 when the damper 32 is opened in a predetermined amount and cold air flows from the communication passage 24 toward the cold compartment side 20 in the refrigerating chamber. In order to bend the rear end of the damper 32 from the free end of the damper 32, and further provided with an extension portion 35 extending a predetermined length. At this time, the extension 35 is preferably bent vertically from the end of the damper (32). The configuration of the extension part 35 prevents cold air flowing into the refrigerating chamber side cold air flow passage 20 from entering the rear of the damper 32 so that vortices do not occur behind the damper 32 and cold air is stored in the refrigerating chamber side cold air. By smoothly flowing to the flow path 20 is to minimize the pressure loss of the cold air passing through the damper device (30).

In addition, as shown in FIG. 4, when the damper 32 is opened, an extension part 35 of the damper 32 is accommodated so that the damper 32 may be completely opened. A protrusion 37 having an accommodation groove 37a for accommodating the extension 35 is provided, and an accommodation groove 36 recessed to a predetermined depth to accommodate the protrusion 37 is provided on an inner surface of the cold air flow path 20. Is formed. In this case, the embodiment of FIG. 4 is provided with a protrusion 37 having a receiving groove 37a in the case 31, and the protrusion 37 enters the receiving groove 36 on the inner surface of the cold air passage 20. However, instead of providing a protrusion 37 in the case 31, an extension groove 35 passes through (not shown) is provided, and the extension portion 35 of the damper through the cold air flow path 20 It may be to enter directly into the receiving groove (36).

The following describes the operation of the refrigerator with a damper device according to the present invention of such a configuration.

As shown in FIG. 2, when the cold air circulation fan 16 behind the freezing chamber 11 is driven, cold air cooled while passing through the evaporator 15 is supplied to the freezing chamber side cold air flow passage 18, and the cold air flow passage ( The cold air of 18 is supplied into the freezing chamber 11 through the cold air discharge port 17a of the inner plate 17. In addition, a part of the cold air in the freezer compartment side cold air flow passage 18 flows into the cold compartment flow passage 20 in the refrigerating compartment side through the communication passage 24 of the intermediate wall 22 and through the cold air outlet 21a of the refrigerating compartment 12. It is supplied internally. The internal air of the freezing chamber 11 and the refrigerating chamber 12 continues to circulate while returning to the evaporator 15 through the cold air return passage 25 of the intermediate wall 24 again.

When the cold air circulation operation is made, the amount of cool air flowing from the freezer compartment side cold air passage 18 to the refrigerating compartment side cold air passage 20 is controlled by the operation of the damper device 30. That is, the damper device 30 is controlled by a control unit (not shown) of the refrigerator. The control unit of the refrigerator uses a temperature sensor (not shown) in the refrigerating chamber 12 to set the internal temperature of the refrigerating chamber 12 to a user set temperature range. Based on this, the step motor 34 of the damper device 30 is operated to rotate the damper 32 so that the opening degree of the communication passage 24 is appropriately adjusted.

At this time, the cold air flowing into the refrigerating chamber side cold air flow path 20 flows to the rear of the damper 32 due to the pressure difference between the front and rear of the damper 32 as the damper 32 passes through the open portion. However, since the extended portion 35 provided at the free end of the damper 32 blocks such cold air flow and guides the cold air toward the cold air passage 20 in the refrigerating chamber side, the pressure of the cold air passing through the damper 32. The loss is minimized and the cool air flows smoothly.

In addition, when the damper 32 is further rotated to completely open the outlet of the communication passage 24 in order to further lower the temperature of the refrigerating chamber 12, as shown in FIG. 4, the extension part 35 of the damper is a cold air passage ( Since it enters into the receiving groove 36 of 20, the damper 32 can be rotated to the maximum in close proximity to the inner surface of the case 31, so that the opening of the communication passage 24 can be fully opened.

As described above in detail, the refrigerator according to the present invention prevents the vortex behind the damper by the action of the extension provided at the free end of the damper, and the cold air passing through the damper device because the flow of cold air is guided to the cold air flow path on the refrigerating chamber. Since the pressure loss is minimized, there is an effect that the flow of cold air flowing from the freezer side to the refrigerating chamber is smoothly performed.

Claims (3)

In the refrigerator having a damper device comprising a damper rotatably coupled to the middle of the cold air flow path for controlling the opening of the cold air flow path, and a motor for rotating the damper in the forward and reverse directions, Refrigerator, characterized in that for extending the predetermined length after bending the rear end of the damper from the free end of the damper so that no vortex occurs in the rear of the damper when the flow of cold air is made in a predetermined amount open state . The method of claim 1, And a receiving groove recessed to a predetermined depth on the inner surface of the cold air passage to accommodate the extension part when the damper is opened. The method of claim 1, And the extension portion is bent to be perpendicular to the damper.