JP3068809B2 - Refrigerator that can accelerate cold air discharge speed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce temperature difference between respective parts in a cooling chamber by providing a cold air accelerating part adjacent to a cold air outlet port in a cold air duct for accelerating cold air entering the cold air duct and discharging the cold air through the cold air outlet port. SOLUTION: Cold air generated in an evaporator 22 is supplied by an air supply fan 24, one part of cold air is supplied to a freezing chamber 10a and the other part of cold air enters a cold air duct 10c. The cold air entering the cold air duct 10c is accelerated by a cold air accelerator. That is to say, when a driving motor 32 operates to rotate a cam cylinder 34, fan plates 36 rotate to accelerate the cold air entering the cold air duct 10c toward a cold air outlet port. Accordingly, the cold air rapidly reaches an area adjacent to a door 14 in a refrigerating chamber 10b, so that the temperature difference between a part near the rear surface of the refrigerating chamber 10b and a part near the door 14 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to a refrigerator capable of strongly supplying cool air by accelerating the speed of cool air supplied into a cooling chamber.

[0002]

2. Description of the Related Art As shown in FIG.
a and a freezer compartment 10 forming a refrigerator compartment 10b.
a and a freezer compartment door 12 that opens and closes the refrigerator compartment 10b, respectively.
And a refrigerator compartment door 14. An evaporator 22 for generating cool air and a blower fan 24 for supplying the cool air generated by the evaporator 22 to the cooling chambers 10a and 10b are provided behind the freezing room 10a. The refrigerating room 10b is partitioned into a number of spaces by a number of shelves 16, and a duct member 26 having a number of cool air discharge ports 26a is installed on the rear surface of the refrigerating room 10b. The duct member 26 forms a cold air duct 10c in the vertical direction on the rear surface of the refrigerator compartment 10b. The cool air discharge port 26a is formed at a position corresponding to the space partitioned by the shelf 16. Part of the cool air blown by the blower fan 24 flows into the cool air duct 10c,
It is discharged into the refrigerator compartment 10b through the cool air discharge port 26a. Thereby, the food placed on the shelf 16 is cooled. The refrigerator is provided with a cool air guide device for smoothly discharging the cool air flowing into the cool air duct 10c through the cool air discharge port 26a. As shown in FIG. 2, the cool air guide device includes a drive motor 28 having a rotating shaft 28a fixed in a cool air duct 10c by a bracket 30 and arranged along the longitudinal direction of the cool air duct 10c.
And a plurality of disk-shaped holders 25 installed on the rotary shaft 28a, and blades 25a installed between the holders 25. The blade 25a is formed at a position adjacent to the cool air discharge port 26a. The blade 25a is a drive motor 2
8, the cool air supplied into the cool air duct 10c is guided through the cool air discharge port 26a so as to be dispersed in the horizontal direction of the refrigerator compartment 10b.

In general, due to frequent opening and closing operations of the refrigerator compartment door 14, the temperature of the area adjacent to the refrigerator compartment door 14 in the refrigerator compartment 10b tends to rise. However, since the cold air guide device in such a conventional refrigerator only has a function of dispersing the cold air in the horizontal direction, the cold air supplied into the refrigerator compartment 10b is quickly supplied to the area adjacent to the refrigerator compartment door 14. Do not reach. Therefore, a temperature difference is likely to occur between the area adjacent to the rear wall surface of the refrigerator compartment 10b and the area adjacent to the refrigerator compartment door 14, and the food stored in the refrigerator compartment 10b is overcooled depending on the position. Or insufficient cooling. Further, the temperature deviation in the refrigerator compartment 10b tends to occur not only between the front and the rear of the refrigerator compartment 10b but also between the upper and lower portions of the refrigerator compartment 10b. In particular, when new food is stored in the refrigerator compartment 10b at a predetermined position, for example, in the upper part of the refrigerator compartment 10b, the ambient temperature of the newly stored food rises sharply compared to other parts.
At this time, if cold air is supplied into the refrigerator compartment 10b for cooling the food, the food already stored in another position, for example, the lower part of the refrigerator compartment 10b may be overcooled. However, the conventional refrigerator has a problem in that it is not possible to control the temperature in the vertical direction in the refrigerator compartment 10b to be maintained uniformly.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems.
An object of the present invention is to provide a refrigerator capable of reducing a temperature difference between respective parts in a cooling chamber by accelerating the speed of cold air and supplying the cooled air to a cooling chamber. Another object of the present invention is to provide a refrigerator capable of uniformly cooling food contained in a cooling chamber by making the degree of acceleration of cold air discharged into the cooling chamber different for each portion in the vertical direction of the cooling chamber. Is to provide.

[0005]

According to the present invention, there is provided a refrigerator comprising: an evaporator for generating cool air; a blower fan for blowing the cool air generated by the evaporator; A duct member having a plurality of cool air outlets formed therein, the cool air duct being provided with the cool air blown by the blower fan, and being open to the cooling chamber; and being adjacent to the cool air outlet in the cool air duct. And a cool air accelerating unit that accelerates the cool air flowing into the cool air duct and discharges the cool air through the cool air discharge port. Here, the cool air accelerating unit includes one or more fan plates rotatably installed in an area adjacent to the cool air discharge port; a drive motor for driving the fan plate; and rotation of the drive motor. Cam means for rotating the fan plate; wherein the fan plate comprises:
A pin, and a plate provided on one side of the pin.
And the fan plate is pivotally movable at the pin.
The cam means is supported on the other side with respect to the pin.
The plate portion moves up and down due to the transmission of the motion.
Re-turn . According to the present invention, the cam means is rotated by the drive motor, and a cam cylinder having one or more cam grooves formed on an outer peripheral surface thereof; and a cam cylinder extending from the other side of the fan plate , Guide protrusions respectively inserted into the grooves and guided along the cam grooves. According to the invention, the cam means is arranged in front of the fan plate along its longitudinal direction.
A bar connected to the other side ; a cam member rotated by the drive motor to reciprocate the bar; and a spring elastically contacting the bar with a cam surface of the cam member. it can.

Preferably, the refrigerator according to the present invention further includes horizontal steering means installed in the cool air duct to adjust a horizontal discharge direction of the cool air flowing into the cool air duct. The horizontal steering means is disposed along the longitudinal direction of the cool air duct, and is provided on the rotary bar so as to be adjacent to the cool air discharge port; A plurality of steering plates arranged at an angle. In order to achieve another object of the present invention, a refrigerator according to the present invention includes at least two or more cold air accelerating units. Here, the cool air accelerating units are respectively installed at positions corresponding to the upper space and the lower space of the cooling chamber, and are individually controlled. A plurality of temperature sensors are installed inside the cooling chamber, and the cool air accelerating unit is controlled based on the measurement result of the temperature sensor so that the degree of acceleration of the cool air discharged to a high temperature part is increased. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. The same parts as those of the conventional refrigerator shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. FIG. 3 shows a refrigerator according to the first embodiment of the present invention, and FIGS. 4 and 5 show the cold air accelerating device of FIG. 3, respectively. In the refrigerator according to the present invention, the freezing room 10a, the refrigerating room 10b, the evaporator 22, and the blowing fan 2 are provided.
The configuration of 4 is the same as the conventional refrigerator. A duct member 26 having a large number of cool air discharge ports 26a is provided on the rear surface of the refrigerator compartment 10b. The duct member 26 includes the evaporator 2
2 to form the cool air duct 10c into which the cool air blown by the blower fan 24 flows. The cold air accelerator is
As shown in FIGS. 4 and 5, the driving motor 32, the cam cylinder 34 rotated by the driving motor 32, and a fan plate rotated by the cam cylinder 34.
36. The drive motor 32 is fixed to the upper part of the cool air duct 10c by a bracket 40. The cam cylinder 34 is connected to a rotation shaft 32a of the drive motor 32. A large number of cam grooves 34a are formed on the outer peripheral surface of the cam cylinder 34 at an angle to the rotation direction.
The fan plate 36 is connected to the cool air discharge port 26 of the duct member 26.
It is arranged adjacent to a. Fan plate 36 is pivotally supported by a pin 38 fixed in position
There Ru. The fan plate 36 has one side with respect to the pin 38.
Is formed on the other side, and the cam groove 34 is formed on the other side.
A guide protrusion 36a to be inserted into a is formed. Therefore, if the cam cylinder 34 rotates, the guide projection 36
a is guided along the cam groove 34a, the guide butt
The movement of the cam cylinder 34 is transmitted to the origin 36a.
Accordingly, the plate portion 37 reciprocates up and down . Evaporator 2
2 is blown by the blower fan 24,
Some of the cool air is supplied to the freezing room 10a, and some of the cool air flows into the cool air duct 10c. The cool air flowing into the cool air duct 10c is accelerated by the cool air accelerating device. That is, when the drive motor 32 operates to rotate the cam cylinder 34, the plate portion 37 is rotated by the guide protrusion 36a and the cam groove 34a. The plate portion 37 accelerates the cool air flowing into the cool air duct 10c toward the cool air discharge port 26a, whereby the discharge speed of the cool air from the cool air discharge port 26a increases. Therefore, the refrigerator compartment 10b
The cool air quickly reaches the area adjacent to the door 14 in the inside, and the temperature difference between the vicinity of the rear surface of the refrigerator compartment 10b and the vicinity of the door 14 is reduced. Further, even if the door 14 is frequently opened and closed, the internal temperature of the refrigerator compartment 10b is kept uniform.

Further, according to the present invention, the cool air duct 10c is provided.
The effect that the cold air flowing into the inside is dispersed in the upper part and the lower part of the refrigerator compartment 10b can be additionally obtained. That is, since the cool air discharged from the cool air discharge port 26a is guided along the plate portion 37 , the cool air is discharged upward when the plate portion 37 rotates upward, and the plate portion 37 rotates downward. Then, cool air is discharged downward. Therefore, if the plate portion 37 rotates continuously, the direction of discharging the cool air from the cool air discharge port 26a changes up and down, so that the effect of vertically dispersing the cool air in the refrigerator compartment 10b can be obtained. Thereby, the effect of maintaining the uniform temperature in the refrigerator compartment 10b is further increased.

FIG. 6 is an exploded perspective view of a cold air accelerating device according to a second embodiment of the present invention, and FIG. 7 is a side sectional view of the coupled state of FIG. The cool air accelerating device according to the present embodiment includes a drive motor 58, a cam member 56 rotated by the drive motor 58, a bar 70 driven by the cam member 56, and a number of fans rotating by the bar 70 to accelerate cool air. Includes plate 60. The drive motor 58 is fixed by a motor bracket 50b formed on the upper part of the duct member 26. The cam member 56 is a rotary shaft 58a of the drive motor 58.
And is rotated by the drive motor 58. Cam member 5
A cam groove 56a having a change in height in the vertical direction is formed on the bottom surface of 6. The upper end of the bar 70 is inserted into the cam groove 56a. A bar bracket 5 having an insertion hole 54a formed in a lower portion of the left side surface of the duct member 26.
4 project, and the lower end of the bar 70 is inserted into the insertion hole 54a. A support portion 70a is formed below the bar 70, and a spring 74 is interposed between the support portion 70a and the bar bracket 54. The spring 74 presses the bar 70 upward. Thus, the upper end of the bar 70 elastically contacts the cam groove 56a. The bar 70 has a hook 72 connected to the fan plate 60. Fan plate 60 hinge pin at its side ends (Hoon
) 62 are formed. Hinge brackets 52 having hinge holes 52a protrude from both sides of the duct member 26, and the hinge pins 62 of the fan plate 60 are inserted into and connected to the hinge holes 52a. This allows
Fan plate 60 is rotatable at hinge pin 62
It is pivoted. One side of the hinge pin 62
And a hook 72 of a bar 70 on the other side.
A coupling pin 60a is formed to couple with the coupling pin 60a. When the drive motor 58 operates, the cam member 56 rotates, whereby the bar 70 reciprocates up and down. The reciprocating motion of the bar 70 is transmitted to the coupling pin 60a, so that the plate 6
1 reciprocates up and down, thereby increasing the cool air discharge speed from the cool air discharge port 26a. In addition, the cold air duct 10
cool air that has flowed into the c are plate portion of the fan plate 60
It is distributed in the vertical direction in the refrigerator compartment along 61 . The drive motor 58 operates continuously during operation of the refrigerator, but can be controlled to stop or operate as necessary. That is, the operation of the drive motor 58 can be controlled according to the temperature in the refrigerator compartment 10b so that the cool air is intensively discharged to the high temperature part.

FIG. 8 is an exploded perspective view of a cool air accelerating device according to a third embodiment of the present invention, and FIG. 9 is a side sectional view of the coupled state of FIG. In this embodiment, the cool air acceleration device further includes a horizontal steering device for controlling the cool air discharge direction in the horizontal direction, and the other parts are the same as those in the embodiment shown in FIGS. is there. The horizontal steering device includes a rotating bar 8 arranged along the longitudinal direction of the cold air duct 10c.
And a number of steering plates 84 mounted on the rotating bar 80. The upper end of the rotary bar 80 is connected to the rotary shaft 58a of the drive motor 58 that passes through the cam member 56, and the lower end is inserted into a support hole 50c formed in the lower part of the duct member 26. A support plate 82 is formed at the upper and lower portions of the rotating bar 80, and the steering plate 84 is disposed between the support plates 82. The steering plate 84 is disposed adjacent to the cool air discharge port 26a, and is formed to be inclined at a predetermined angle with respect to the rotating bar 80. The cool air supplied into the cool air duct is guided to the cool air discharge port 26a along the plate surface of the steering plate 84. The steering plate 84 is rotated by the drive motor 58, whereby the discharge direction of the cool air guided by the steering plate 84 changes in the horizontal direction. At this time, the cool air is accelerated by the fan plate 60 as described in the embodiment of FIGS. 6 and 7, and at the same time, the discharge direction of the accelerated cool air changes in the vertical direction.
Thereby, the accelerated cool air is dispersed in the vertical and horizontal directions in the refrigerator compartment, and the cool air can be uniformly supplied into the refrigerator compartment 10b.

FIG. 10 is a modification of the refrigerator shown in FIGS. 3 to 5, and FIG. 11 is a partially enlarged perspective view of FIG. In this modification, the configurations of the freezing room 10a, the refrigerating room 10b, the evaporator 22, and the blower fan 24 are the same as those of the conventional refrigerator shown in FIGS. In the cool air duct 10c formed by the duct member 26, a pair of cool air accelerators 171 and 172 that are individually controlled are installed. The configuration of each of the cool air accelerators 171 and 172 is similar to the cool air accelerator shown in FIGS. That is, each of the cool air accelerating devices 171 and 172 includes a drive motor 162 fixed in the cool air duct 10c by a bracket 160, a cam cylinder 164 rotated by the drive motor 162, and the cam cylinder 1 as shown in FIG.
64 includes a fan plate 166 pivoted by 64. The cam cylinder 164 is connected to a rotation shaft 162a of the drive motor 162, and a cam groove 164a is formed on an outer peripheral surface of the cam cylinder 164 at an angle to the rotation direction. Fan plate 1
66 is arranged adjacent to the cool air discharge port 26 a of the duct member 26. Fan plate 166 is Ru Tei is pivotally supported by a pin 168 which is fixed in position. The fan plate 166 has one side with respect to the pin 168.
A port portion 167 is formed, and a cam groove 164a is formed on the other side.
A guide projection 166a to be inserted into the guide is formed. Therefore, if the cam cylinder 164 rotates, the guide protrusion 1
66a is guided along the cam groove 164a, moth
The motion of the cam cylinder 164 is transmitted to the projection 166a.
As a result, the plate portion 167 reciprocates up and down.
You. The first temperature sensor 170a and the second
A temperature sensor 170b is provided. The first temperature sensor 170a measures the temperature of the upper part of the refrigerator compartment 10b, and the second temperature sensor 170b measures the temperature of the lower part of the refrigerator compartment 10b. First temperature sensor 170a and second temperature sensor 170
b denotes a first control unit 173 and a second control unit 174, respectively.
It is connected to. First control unit 173 and second control unit 1
Reference numeral 74 denotes a drive motor 16 of the first cold air accelerating device 171 based on the temperature sensing results of the temperature sensors 170a and 170b.
The drive motors 162 of the second and second cool air acceleration devices 172 are controlled respectively. That is, if the first temperature sensor 170a detects a temperature rise in the upper part of the refrigerator compartment 10b, the first controller 1
73 increases the rotation speed of the drive motor 162 of the first cool air accelerating device 171, and the second temperature sensor 170b
If the temperature rise of the lower part of the second control unit 174 is detected, the second control unit 174 is activated.
Increases the rotation speed of the drive motor 162 of the second cool air acceleration device 172. The drive motor 162 of the cool air accelerating device thus operated rotates the corresponding cam cylinder 164. When the cam cylinder 164 rotates, the plate portion 1 is formed by the guide protrusion 166a and the cam groove 164a.
67 is rotated. The plate part 167 is a cold air duct 10
The cool air flowing into c is accelerated toward the cool air discharge port 26a, whereby the discharge speed of the cool air through the cool air discharge port 26a increases. At this time, each drive motor 16
The rotation speed of No. 2 can be controlled to be proportional to the degree of temperature rise detected by the temperature sensors 170a and 170b. As described above, since the cool air is accelerated and supplied to the space in the refrigerator compartment 10b where the temperature has risen, a part requiring a large amount of cool air is effectively cooled, and the refrigerator compartment 10b is cooled.
The temperature difference between the upper space and the lower space is reduced. In particular, when fresh food is stored in the refrigerator compartment 10b, since the chilled air can be intensively supplied to the stored portion, overcooling or insufficient cooling by the portion does not occur.

In this modification, the cool air accelerators 171 and 172 are arranged at positions corresponding to the upper and lower portions of the refrigerator compartment 10b, respectively. However, the number and position of the cool air accelerators can be changed as required. For example, when the internal space of the refrigerator compartment 10b is divided into three spaces by the shelf 16, it is desirable to install three cool air accelerating devices so as to correspond to the respective divided spaces.

[0013]

As described above, according to the present invention,
Since the accelerated cool air is supplied into the cooling chamber, the temperature in the cooling chamber is maintained uniformly. In particular, by varying the degree of acceleration to each part in the cooling chamber, the effect of uniform cooling can be further enhanced. it can. As described above, the present invention has been specifically described based on the preferred embodiments. However, the present invention is not limited thereto, and it is needless to say that modifications and improvements can be made without departing from the gist of the present invention. It is.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a conventional refrigerator.

FIG. 2 is a partially enlarged exploded perspective view of FIG.

FIG. 3 is a side sectional view of the refrigerator according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of the cold air acceleration device of FIG.

FIG. 5 is a top view of FIG. 4;

FIG. 6 is an exploded perspective view of a cool air acceleration device according to a second embodiment of the present invention.

FIG. 7 is a side sectional view showing the connected state of FIG. 6;

FIG. 8 is an exploded perspective view of a cool air acceleration device according to a third embodiment of the present invention.

FIG. 9 is a side sectional view showing the connected state of FIG. 8;

FIG. 10 is a modification of the refrigerator shown in FIGS. 3 to 5;

11 is a partially enlarged perspective view of FIG.

[Explanation of symbols]

10a Freezer room (cooling room) 10b Cold room (cooling room) 10c Cold air duct 22 Evaporator 24 Blower fan 26 Duct member 26a Cold air discharge port 32, 58, 162 Drive motor 34, 164 Cam cylinder 34a, 56a, 164a Cam groove 36 , 60, 166 Fan plate 36a, 166a Guide projection 37, 61, 167 Plate portion 56 Cam member 70 Bar 74 Spring 80 Rotating bar 84 Steering plate 170a First temperature sensor 170b Second temperature sensor

Continued on the front page (31) Priority claim number 1997 64545 (32) Priority date November 29, 1997 (November 29, 1997) (33) Priority claiming country Korea (KR) Preliminary examination (58) Survey Field (Int.Cl. ⁷ , DB name) F25D 17/08

Claims (8)

(57) [Claims] An evaporator for generating cool air; a blower fan for blowing the cool air generated by the evaporator; a cool air duct installed on one side wall of a cooling chamber and into which cool air blown by the blower fan flows. A duct member having a large number of cold air discharge ports opened in the cooling chamber;
And a cool air accelerating unit arranged in the cool air duct so as to be adjacent to the cool air discharge port, and accelerating the cool air flowing into the cool air duct and discharging through the cool air discharge port. One or more fan plates rotatably installed in an area adjacent to the cool air discharge port; a drive motor for driving the fan plate; and a cam for rotating the fan plate by rotation of the drive motor. Means, said fan plate having a pin and one side with respect to said pin.
Provided with a plate portion, the fan plate,
The pin is rotatably supported at the pin, and
By transmitting the motion of the cam means to the other side,
A refrigerator characterized in that the plate portion reciprocates up and down . Wherein said cam means is rotated by the drive motor, the cam cylinder least one cam groove is formed on the outer peripheral surface thereof; said and the fan plate
The refrigerator according to claim 1, further comprising a guide protrusion extending from the other side and inserted into the cam groove and guided along the cam groove. 3. The cam means includes: a bar to which the other side of the fan plate is connected along a longitudinal direction thereof; a cam member which is rotated by the drive motor to reciprocate the bar; The refrigerator according to claim 1, further comprising: a spring that elastically contacts a cam surface of the cam member. 4. The refrigerator according to claim 3, further comprising a horizontal steering unit installed in the cool air duct to adjust a horizontal discharge direction of the cool air flowing into the cool air duct. . 5. The horizontal steering means is disposed along a longitudinal direction of the cool air duct, and is mounted on the rotary bar to be rotated by the drive motor; and on the rotary bar adjacent to the cool air discharge port, The refrigerator according to claim 4, further comprising: a plurality of steering plates disposed obliquely with respect to the rotating bar. 6. The refrigerator according to claim 1, wherein at least two or more of the cool air acceleration units are installed, and each of the cool air acceleration units is individually controlled. 7. The refrigerator according to claim 6, wherein each of the cool air accelerating units is installed at a position corresponding to an upper space and a lower space of the cooling chamber. 8. The cooling air accelerating unit further includes a plurality of temperature sensors for measuring a temperature of a predetermined portion in the cooling chamber, wherein the cooling air accelerating unit is configured to discharge cold air to a high-temperature portion based on a measurement result of the temperature sensor. 7. The refrigerator according to claim 6, wherein the degree of acceleration of the refrigerator is controlled to increase.