KR20080022008A - Refrigerator - Google Patents

Abstract

A refrigerator having a damper unit is provided to reduce manufacturing costs of the damper unit, as an opening/closing plate is opened and closed by one-way rotation of a rotary cam rotated by an AC motor which rotates in one direction. A refrigerator comprises a damper unit(30) for opening and closing a cool air passage(21). The damper unit comprises an opening/closing plate(31) rotatably mounted to the cool air passage, a rotary cam(32) mounted aside the opening and closing plate having a cam groove(35) which is eccentric to the center of rotation, an AC(Alternating Current) motor(33) rotating the rotary cam, a connecting shaft(36) extending from the opening/closing plate to enter the cam groove of the rotary cam, and an elastic member(34) rotating the opening/closing plate in a closing direction of the cool air passage.

Description

Refrigerator {REFRIGERATOR}

1 is a cross-sectional view showing the internal structure of a refrigerator according to a first embodiment of the present invention.

2 is a front view of the refrigerator according to the first embodiment of the present invention.

3 is a perspective view of a refrigerator damper according to the first embodiment of the present invention.

4 is a front view of the refrigerator damper device according to the first embodiment of the present invention.

5 is a front view of a refrigerator according to a second embodiment of the present invention.

6 is a front view of the refrigerator damper device according to the second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: main unit, 11: refrigerating chamber,

12: freezer, 16: evaporator,

17: cold air circulation fan, 21: cold air flow path in the refrigerator,

30: damper device, 31: opening and closing plate,

32: rotary cam, 33: AC motor,

34: torsion springs, 35: cam groove,

36: connecting shaft.

The present invention relates to a refrigerator, and more particularly to a refrigerator having a damper device for opening and closing the cold air flow path.

The refrigerator disclosed in Japanese Patent Laid-Open No. 2005-69646 has a main body in which a refrigerating chamber is formed at an upper portion and a freezing chamber is formed at a lower portion thereof. Behind the freezer compartment of the refrigerator is an evaporator for cooling the freezer compartment and the refrigerating compartment. A cold air flow passage is formed at the rear of the refrigerating compartment to supply the air cooled through the evaporator to the interior compartment, and a damper device is provided at the cold air flow passage to control the cold air supply.

The damper device includes an opening and closing plate rotatably installed in the cold air flow path, and a step motor for rotating the opening and closing plate in the forward or reverse direction to open and close the cold air flow path. The shaft of the stepper motor is directly connected to the opening and closing plate. Such a damper device has a stepper motor rotating the switchboard to open the cold air flow path when the temperature of the refrigerating chamber rises to the control upper limit temperature, and the stepper motor rotates the switchboard in reverse when the temperature of the refrigerating chamber lowers to the control lower limit temperature. Close the flow path. In this way, the damper device adjusts the cold air supply of the refrigerating compartment so that the refrigerating compartment is maintained at the set temperature range.

However, the damper device of the refrigerator has a drawback in that the manufacturing cost is high because it employs an expensive step motor to rotate the switchboard forward or reverse or control the rotation angle of the switchboard. In addition, since the D / C converter for applying DC power to the step motor is necessary for the operation control of the step motor, the configuration of the refrigerator is complicated.

The present invention is to solve the above problems, an object of the present invention is to provide a refrigerator having a damper device to smoothly implement the opening and closing of the flow path while employing an inexpensive AC motor.

Refrigerator according to the present invention for achieving this object includes a damper device for opening and closing the cold air flow path, the damper device is installed on the opening and closing plate rotatably in the cold air flow path, the opening and closing plate side and the rotation center and eccentric And a connecting shaft extending from the opening and closing plate so as to enter the cam groove of the rotating cam, the motor having a rotating cam groove.

In addition, the damper device is characterized in that it comprises an elastic member for rotating the opening and closing plate in the direction of closing the cold air flow path.

In addition, the motor is characterized in that the AC motor rotating in one direction.

In addition, the refrigerator according to the present invention includes a main body having a freezer compartment and a refrigerating compartment and having a first space and a second space in which the refrigerating compartment are mutually divided; First and second cold air passages for supplying cold air to the first and second spaces of the refrigerating chamber, respectively; And first and second damper devices for opening and closing the first and second cold air flow passages, respectively, wherein the first and second damper devices are provided on an opening and closing plate rotatably installed in the respective cold air flow passages, and on the side of the opening and closing plate. It is characterized in that it comprises a rotating cam having a center of rotation and eccentric cam groove, a motor for rotating the rotary cam, and a connecting shaft extending from the opening and closing plate to enter the cam groove of the rotary cam.

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

1 to 4 illustrate a first embodiment of a refrigerator according to the present invention. 1 and 2, the refrigerator of the first embodiment includes a main body 10 in which an upper refrigerating chamber 11 and a lower freezing chamber 12 are partitioned by partition walls 13. The refrigerating chamber 11 and the freezing chamber 12 are open at the front, and the refrigerating chamber door 14 and the freezing chamber door 15 for opening and closing the refrigerating chamber 11 and the freezing chamber 12 are respectively installed on the front surface of the main body 10. .

Inside the freezer compartment 12, a cold air circulation fan 17 for circulation of the evaporator 16 and cold air is installed. In the rear of the freezing chamber 12, a space in which the evaporator 16 and the cold air circulation fan 17 are installed and an inner panel 18 partitioning the freezing chamber 12 are provided, and the inner panel 18 is connected to the freezing chamber 12. A freezer compartment cold air flow path 19 for guiding the cold air supply is formed. A plurality of air supply holes 20 are formed in the inner panel 18 so that the cold air supplied through the freezing chamber cold air flow passage 19 may be distributed and supplied into the freezing chamber 12.

In the rear of the refrigerating chamber 11, a refrigerating chamber cold air passage 21 is formed to supply the cold air of the freezing chamber 12 side to the refrigerating chamber 11. To this end, an inner panel 22 is formed at the inner rear of the refrigerating chamber 11 to form a refrigerating chamber cold air flow passage 21, and a plurality of cold air supply ports 23 are provided at the inner panel 22 for distributing and supplying cold air. Is formed. On the rear wall side of the main body 10, as shown in FIG. 2, the return flow path 25 is formed so that the air which passed through the refrigerating chamber 11 can return to the evaporator 16 behind the freezing chamber 12 again.

The refrigerating chamber cold air flow passage 21 is provided with a damper device 30 that controls the supply of cold air to the refrigerating chamber 11 by opening and closing the flow passage. This is for controlling the temperature of the refrigerating chamber 11 by controlling the refrigeration chamber 11 cold air supply through the damper device 30. That is, when the temperature of the refrigerating chamber 11 rises above the set temperature range, the damper device 30 lowers the temperature of the refrigerating chamber 11 by opening the refrigerating chamber cold air passage 21, and when the temperature of the refrigerating chamber 11 is less than the set temperature range. The damper device 30 is to close the refrigerating compartment cold air flow passage 21 to stop the refrigerating compartment 11 cold air supply.

As shown in FIGS. 3 and 4, the damper device 30 opens and closes the opening and closing plate 31 and the opening and closing plate 31 rotatably installed in the cold air duct 27 forming the refrigerating chamber cold air flow passage 21. Rotation cam 32 is installed on the side of the opening and closing plate, and includes an alternating current motor 33 for rotating the rotation cam 32 in one direction.

The opening and closing plate 31 is rotatably supported by the rotation shafts 31a formed on both sides of the cold air duct 27, and is provided to have a size corresponding to the cross-sectional area of the cold storage air passage 21 of the refrigerating compartment, thereby opening and closing the flow path. . One rotation shaft 31a of the opening and closing plate 31 is provided with a torsion spring 34 for rotating the opening and closing plate 31 in the direction of closing the refrigerating chamber cold air flow passage 21. This is to enable the opening and closing plate 31 to close the refrigerating chamber cold air flow passage (21) unless an external force is applied to the opening and closing plate (31). 3 illustrates a case in which the opening and closing plate 31 is installed in the cold air duct 21, but the opening and closing plate 31 is a rear wall or an inner panel 22 of the refrigerator main body 10 defining the refrigerator compartment cold air flow passage 21. It can also be coupled to the) side.

Rotating cam 32 is provided in the shape of a disc and the center thereof is coupled to the axis of the alternating current motor 33. In addition, one side of the rotary cam 32 is formed with the center of rotation and the cam groove 35 eccentric. And the opening and closing plate 31 is provided with a connecting shaft 36 extending from the side end to enter the cam groove 35 of the rotary cam 32.

The damper device 30 is a cam groove 35 of the rotary cam 32, the connecting shaft 36 extending from the opening and closing plate 31 when the rotary cam 32 rotates in one direction by the operation of the AC motor 33. As it is guided along and lifts up and down the opening and closing plate 31 is made. That is, the damper device 30 of the present invention can open or close the opening and closing plate 31 only by rotating the rotary cam 32 in one direction. Therefore, the AC motor 33 can be employed as the driving source of the rotary cam 32. Since the AC motor 33 is inexpensive, it is possible to reduce the manufacturing cost of the damper device 30.

The AC motor 33 for operating the rotary cam 32 may be controlled in a manner of adjusting the operating time after detecting the rotation speed through the sensor. In addition, although not shown in the drawings, the sensor for detecting the opening or closing of the opening and closing plate 31 can be controlled based on the detection information.

5 and 6 are a second embodiment of a refrigerator according to the present invention. As shown in FIG. 5, the refrigerator according to the second embodiment includes a main body 100 having an upper refrigerating compartment 101 and a lower freezing compartment 102, and the upper refrigerating compartment 101 is a partition plate 103. The upper space is partitioned into an upper first space 104 and a lower second space 105. In addition, the cold air flow path for supplying cold air toward the refrigerating chamber 101 also includes a first cold air flow passage 121 for guiding cold air supply to the first space 104 and a second cold air for guiding cold air supply to the second space 105. It branches to the flow path 122.

The first cold air passage 121 is provided with a first damper device 130 for opening and closing the flow path, and the second cold air passage 122 is provided with a second damper device 140. This is to control the first and second damper device (130,140) separately to selectively open and close the first cold air flow passage 121 and the second cold air flow passage 122, the cold air of the first space 104 or the second space 105 The supply is controlled, and thus the temperature of the first space 104 and the second space 105 can be maintained differently. This is to maintain the freshness of the storage for a long time by storing the storage having different storage conditions in the first space 104 and the second space 105 separately.

The air in the first and second spaces 104 and 105 of the refrigerating compartment 101 returns to the evaporator 107 behind the freezing compartment 102 through the return passage 106, and after being cooled through the evaporator 107, is again stored in the freezing compartment ( 102 or to the refrigerating chamber 101.

As shown in FIG. 6, the first damper device 130 and the second damper device 140 have the same shape as the damper device of the first embodiment. That is, each damper device (130,140) is installed on the side of the opening and closing plate (131,141), the opening and closing plate (131,141) installed in each cold air flow passage (1211, 22), the rotary cam (132, 142) having a center of rotation and eccentric cam grooves (135, 145) , AC motors 133 and 143 for rotating the rotary cams 132 and 142, and connecting shafts 136 and 146 extending from the opening and closing plates 131 and 141 to enter the cam grooves 135 and 145 of the rotary cams 132 and 142. It further includes torsion springs 134 and 144 for rotating the opening and closing plates 131 and 141 in the closing direction.

Also in the second embodiment, an AC motor that rotates in one direction may be used as a driving source of the first damper device 130 and the second damper device 140. Therefore, it is possible to reduce the manufacturing cost for the configuration of each damper device (130,140).

As described in detail above, the refrigerator according to the present invention is a structure that can open and close the cold air flow path only by rotating the rotation cam of the damper device 360 degrees to smoothly implement the opening and closing of the cold air flow path while adopting an inexpensive AC motor. It can be effective.

In addition, since the present invention uses an AC motor as a driving source of the damper device, AC power can be directly applied for the operation of the damper device. Therefore, since a separate D / C converter is not required for the operation of the damper device, the configuration of the refrigerator can be simplified.

Claims (4)

In the refrigerator with a damper device for opening and closing the cold air flow path, The damper device includes a rotating cam rotatably installed in the cold air flow path, a rotation cam installed on the side of the opening and closing plate and having a center of rotation and an eccentric cam groove, a motor for rotating the rotation cam, and a cam groove of the rotary cam. And a connecting shaft extending from the opening and closing plate to enter. The method of claim 1, The damper device comprises a resilient member for rotating the opening and closing plate in the direction of closing the cold air flow path. The method of claim 1, The motor is a refrigerator, characterized in that the AC motor rotating in one direction. A main body including a freezing compartment and a refrigerating compartment and having a first space and a second space in which the refrigerating compartment is mutually divided; First and second cold air passages for supplying cold air to the first and second spaces of the refrigerating chamber, respectively; First and second damper device for opening and closing the first and second cold air flow path, respectively, The first and second damper device is a rotating cam rotatably installed in each of the cold air flow path, a rotary cam having a cam center which is installed on the side of the opening and closing plate and the center of rotation, and the motor for rotating the rotary cam; And a connecting shaft extending from the opening and closing plate to enter the cam groove of the rotary cam.

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