JPH08327207A - Refrigerator on which cold-air circulator is mounted - Google Patents

Abstract

PURPOSE: To reduce power consumption by driving a fan motor to introduce cold air, which has circulated in a freezing chamber and a cold chamber equipped with independent fans respectively, to an evaporator provided at a rear wall of the freezing chamber and an evaporator provided at a rear wall of the cold chamber. CONSTITUTION: Evaporators 11 and 21 are independently provided in cold-air ducts 31 and 32 at the rear walls of a freezing chamber 10 and a cold chamber 20, respectively. A cold air circulator 100 comprises a fan motor 130, integrally formed rotary shafts 131 and 132 protruding from the fan motor 130 upward and downward, respectively, and a freezing-chamber fan 110 and a cold chamber fan 120 fastened to the upward and downward rotary shafts 131 and 132 at the rotational axes thereof, respectively. The cold air circulator 100 equipped with casings 141 and 142 surrounding the outer peripheries of the fans 110 and 120 is driven by the fan motor 130 to supply cold air fed from the chambers to respective cold air ducts. As a result, it is possible to drive two fans 110 and 120 by the single motor 130 and consequently reduce power consumption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator provided with a cool air circulating device, and more particularly, to a cool air circulating device for driving two fans by one motor at a cool air suction portion in an intermediate wall. A refrigerator provided with a cool air circulation device.

[0002]

2. Description of the Related Art Refrigerators are generally constructed such that a freezing room provided at an upper portion and a refrigerator room provided at a lower portion are separated by an intermediate wall. One evaporator is installed on the intermediate wall and the rear wall of the refrigerator, and one blower fan is configured to send cold air passing through the evaporator to the freezer compartment and the refrigerator compartment, respectively.

[0003]

However, a refrigerator employing one evaporator has a different temperature and mixes the returning cool air to the evaporator. However, there is a problem that the efficiency of the method is reduced.

Recently, in consideration of the problem of the above-mentioned method in which one room is shared by each room, each room, that is,
The system adopts one evaporator for each of the freezer and refrigerator compartments.

FIG. 4 shows a refrigerator employing an individual evaporator in each of such chambers, in which a refrigerator 40 disposed at an upper part and a refrigerator 50 disposed at a lower part thereof. , An intermediate wall 60 is located. In front of the freezer compartment 40 and the refrigerator compartment 50, doors UD, which open and close around one side,
Each LD is installed. The evaporators 41 and 51, which circulate in the refrigerator and cool the cold air whose temperature has risen, are arranged so that the evaporators 41 and 51 are adjacent to the rear walls 65 and 67 of the chambers 40 and 50, respectively.
Installed in 50.

Further, a compressor 59, which is operated by a control unit (not shown), is installed in the lower portion of the refrigerating chamber 50 to send the compressed refrigerant to the evaporators 41 and 51. Each evaporator 41, 5
Blower fan 4 for circulating the cool air above 1
A motor 4 for driving the fans 43, 53 by 3, 53
2 and 52 are installed on each of the rear walls 65 and 67. Evaporator covers 44, 54 are installed at predetermined intervals in front of the evaporators 41, 51.

A large number of discharge holes 45, 55 are formed in the evaporator covers 44, 54 at regular intervals in the vertical direction, so that the cool air that has passed through the evaporators 41, 51 is cooled. Discharge into chambers 40 and 50.

The discharged cool air is supplied to the food F in the freezer compartment 40 and the food F placed on the shelf 57 in the refrigerator compartment 50.
After exchanging heat, the heat is exchanged to the evaporators 41, 51 through the suction ports 46, 56 formed in the lower portions of the evaporator covers 44, 54.

Also in the refrigerator having the conventional cold air circulation device configured as described above, the axial fan for the freezing compartment and the axial fan for the refrigerating compartment are installed in the respective chambers, and the axial flow A fan motor for driving the fan is also installed in each room corresponding to the axial fan, which causes a problem of increasing power consumption.

Further, the cold air generated in each evaporator is
Evaporator cover having a discharge hole for smooth discharge into the freezer compartment or the refrigerator compartment, on the entire evaporator,
When the chambers are separated by a predetermined distance and installed in each of the freezer compartment and the refrigerator compartment, there is a problem that the effective internal volume of each compartment is reduced.

On the other hand, by installing a fan motor at the outlet side of each evaporator, low-temperature cold air directly contacts the fan motor, adversely affecting the performance of the fan motor, and further increasing the density of the high-density cold air. Is discharged through a fan connected to a fan motor,
There is a problem in that a high load is applied to the fan and noise is generated in the fan.

Further, when the cool air circulating in each chamber is guided to the suction port formed at the lower portion of the evaporator cover, the path of the cool air is obstructed by the food and drink in each room, so that the cool air is uniformly distributed to the suction port. In addition, since it is impossible to return and inhale at the same time, there is a problem in that uneven frost is formed on the evaporator and the driving efficiency of the evaporator is reduced.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned various problems, and has as its object the purpose of using two motors with one motor. And reduce power consumption.
An object of the present invention is to provide a refrigerator provided with a cool air circulation device.

Another object of the present invention is to provide a refrigerator provided with a cool air circulating device that can increase the effective internal volume of each room by disposing the cool air circulating device in an intermediate wall. is there.

Another object of the present invention is to install the cold air circulation device in the cold air suction part of the intermediate wall,
Inhaling the relatively high-temperature cold air that has undergone heat exchange to prevent the efficiency of the fan motor from decreasing, while reducing the cool air density at relatively high temperatures and reducing the load applied to the fan. Another object of the present invention is to provide a refrigerator provided with a cool air circulation device.

Accordingly, another object of the present invention is to provide a cool air circulation path for a cool air circulation device so that cool air returning after circulating through each chamber is uniformly flowed into the inlet of each evaporator. ,
An object of the present invention is to provide a refrigerator provided with a cool air circulating device, which is formed in a diffuser shape, in which the evaporator is uniformly frosted and the efficiency of the evaporator can be increased.

In order to achieve such an object, a refrigerator provided with a cool air circulation device according to the present invention is provided with a freezing room provided with a first evaporator on a rear wall, and a freezing room located at a lower portion of the freezing room and provided on a rear wall. Second
A refrigerating compartment provided with an evaporator, an intermediate wall for partitioning the freezing compartment from the refrigerating compartment, and cold air circulated in the intermediate compartment and circulating in the freezing compartment and the refrigerating compartment, to the first evaporator and the second evaporator.
The evaporator is configured to include a cool air circulation device that can be guided to each of the evaporators.

Further, the cool air circulating device is provided with a fan motor, a first fan that is vertically symmetrically mounted on the fan motor and sucks and discharges cool air in the freezer compartment, and a second fan that sucks and discharges cool air in the refrigerator compartment. A fan, a first and second casing surrounding each of the first and second fans, and a cool air guide path for sending cool air guided to the first and second casings to the first and second evaporators. Be composed.

[0019]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a side sectional view of a refrigerator to which the present invention is applied, and FIG. 2 is a side sectional view showing a cold air circulation device of the present invention. The refrigerator is configured such that a freezer compartment 10 is provided at an upper portion and a refrigerator compartment 20 is provided at a lower portion thereof by an intermediate wall 30. The refrigerator compartment 10 and the refrigerator compartment 20 are rotated around one side in front of the refrigerator compartment 10 and the refrigerator compartment 20. Doors UD and LD are installed.

On the rear wall of each of the chambers 10 and 20, independent evaporators 11 and 21 are installed, and evaporator covers 12 and 22 are installed so as to contact the front of the evaporators 11 and 21.
A cold air circulation passage is formed. The evaporator covers 12 and 22 have discharge ports 15 and 25 for discharging the cool air generated in the evaporators 11 and 21 to the respective chambers 10 and 20.

Further, at the outlet of the evaporator 21 of the refrigerating chamber 20, a damper 23 for sending the cool air passing through the evaporator 21 to the refrigerating chamber 20 and adjusting the discharge amount is provided.

The cold air circulation device 100 of the present invention is installed in the intermediate wall 30 adjacent to the doors UD and LD, and further,
A cool air guide path 31 for returning and guiding the cool air in the freezer compartment 10 to the evaporator 11 and a cool air guide path 32 for returning the cool air in the refrigerator compartment 20 to the evaporator 21 are formed vertically.

The cool air circulation device 100 includes a fan motor 13
0, integral rotating shafts 131 and 132 projecting above and below the fan motor 130, respectively, and the upper and lower rotating shafts 131 and 1
Freezer compartment fan 1 in which the center of rotation is fastened to 32
10 and a refrigerator compartment fan 120.

As a result, the cold air circulation device 100 has casings 141, 1 surrounding the outer circumference of each fan 110, 120.
42 is provided, and the cool air sucked from each of the chambers 10 and 20 is
It sends to each cold air guide way 31,32.

Further, the height of the freezer compartment fan 110 is made larger than the height of the refrigerating compartment fan 120. this is,
This is because it corresponds to the load of cold air in the freezer having a high density being larger than the load of cold air in the refrigerating room having a low density.

That is, since the density of the cold air changes according to the temperature, the density of the cold air in the freezer becomes higher than that of the cold air in the refrigerating room having a relatively higher temperature. In this way, the height of the freezer compartment fan 110 is
The height of the fan is larger than the height of the fan, the surface area of the fan exposed to the cool air is increased, the force of the cool air having a high density acting on the freezer fan is dispersed, and the load on the centrifugal fan can be reduced. is there.

At this time, the fan motor 130 is connected to the intermediate wall 30.
It is possible to prevent the cold air in the freezing compartment 10 and the cold air in the refrigerating compartment 20 from coming into contact with each other by being installed so as to be buried in

Furthermore, by extension, the cold air guide passages 31, 32 are provided.
In the casing 141, as in FIG.
The discharged cool air is formed in the middle wall 30 in a diffuser shape so as to be evenly distributed over the entire surface of the evaporator 11. At this time, the fans 110 and 12 installed in the respective casings 141 and 142 so as to be freely rotatable.
0 is formed by a centrifugal fan having a mountain-shaped side section, but the upper and lower fans 110 and 120 are installed so as to be vertically symmetric with respect to the motor 130.

The refrigerator of the present invention configured as described above operates as follows. Not shown,
The compressor 59 is driven by a signal from the control unit, and sends the compressed cool air to each of the evaporators 11 and 21. The evaporators 11 and 12
In the freezer compartment 10, the cold air that has undergone heat exchange with 1 is discharged into the freezer compartment 10 through the discharge port 15, and the cold compartment 20 is cooled.
In accordance with the temperature condition of the refrigerator compartment 20, the refrigerator compartment 2 through the discharge port 25 via the opened damper 23
It is discharged within 0.

In the freezer compartment 10, the low-temperature cold air that has passed through the discharge port 15 exchanges heat with the food and drink stored in the freezer compartment 10, and then reaches the vicinity of the cold air circulation device 100.
It changes to relatively high temperature cold air. The centrifugal fan 110 rotated by the fan motor 130 smoothly draws in the cool air whose temperature has increased and the density has decreased, and at the same time, guides the cool air into the cool air guide path 31 by the casing 141 surrounding the centrifugal fan 110.

On the other hand, in the refrigerating compartment 20, the low-temperature cold air passing through the discharge port 25 exchanges heat with food and drink stored in the refrigerating compartment 20, similarly to the progress of the cold air in the freezing compartment 10. Then, the air reaches the vicinity of the cool air circulation device 100 and is converted into relatively high-temperature cool air. The centrifugal fan 120 rotated by the fan motor 130 draws in the cold air whose temperature has risen and whose density is low at the same time, and at the same time, guides it to the cold air guiding path 32 by the casing 142 surrounding the centrifugal fan 120.

At this time, there is a difference between the temperature of the cool air approaching the fan 110 of the cool air circulation device 100 in the freezer compartment 10 and the temperature of the cool air approaching the fan 12 of the cool air circulation device 100 in the refrigerator compartment 20.

That is, since the temperature of the cool air passing through the upper fan 110 is lower than the temperature of the cool air passing through the lower fan 120, the density is relatively low. This difference in temperature is made to correspond by changing the heights of the fans 110 and 120 as shown in FIG.

The cool air guided to each of the cool air guide paths 31 and 32 travels along the diffuser type cool air guide paths 31 and 32 whose width increases as they advance, and then, at the end portions thereof, each evaporator. It comes into contact with the suction portions 11 and 21. Thus, the cold air in each of the chambers 10 and 20 can independently advance to the evaporators 11 and 21 without being mixed with each other.

At this time, if the cool air reaches the suction sections of the evaporators 11 and 21 while diffusing while traveling along the diffuser type cool air guide paths 31 and 32, the cool air passes through the entire surface of the suction sections and is evaporated. Even if frost is formed by flowing into the vessels 11 and 21, the frost can be formed on the entire surface of the suction portion. The cool air that has passed through the evaporators 11 and 21 is further discharged to the freezing compartment 10 and the refrigerating compartment 20, respectively.

[0036]

As described above, one motor fan is used for two motors.
By driving the centrifugal fans, power consumption can be reduced, and further, by forming the evaporator cover so as to be in contact with each evaporator, the internal volume of each chamber can be increased.

Furthermore, since the cool air circulation device is provided at the cool air suction portion of the intermediate wall, the efficiency of the fan motor can be prevented from lowering, and the load caused by the cool air on the centrifugal fan can be reduced. .

Furthermore, the returned cool air can be evenly distributed over the entire inlet portion of each evaporator, thereby increasing the efficiency of the evaporator.

[Brief description of drawings]

FIG. 1 is a side sectional view of a refrigerator provided with a cool air circulation device of the present application.

FIG. 2 is an enlarged sectional view of the cold air circulation device in FIG.

FIG. 3 is a plan view taken along the line III-III in FIG.

FIG. 4 is a side sectional view of a refrigerator provided with a conventional cold air circulation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Freezer room 11,21 Evaporator 20 Refrigerator room 31,32 Cold air guideway 100 Cold air circulation device 110,120 Centrifugal fan 130 Fan motor 141,142 Casing

Claims (6)

[Claims] 1. A freezing room having a first evaporator on a rear wall, a refrigerating room located below the freezing room and having a second evaporator on a rear wall, and the freezing room and the refrigerating room are defined. An intermediate wall for urging, and a cold air circulator installed in the intermediate wall for guiding cold air circulated in the freezer compartment and the refrigerator compartment to the first evaporator and the second evaporator, respectively. A refrigerator provided with a cold air circulation device characterized by comprising: 2. The cool air circulating device includes a fan motor, a first fan that is vertically symmetrically mounted on the fan motor, and that sucks and discharges cool air in a freezing room and a second fan that sucks and discharges cool air in a refrigerator room. A first and second casing respectively surrounding the first and second fans; and a cool air guide path for sending cold air guided by the first and second casings to the first and second evaporators. A refrigerator provided with the cool air circulation device according to claim 1, wherein: 3. The refrigeration compartment circulating cool air and the refrigerating compartment circulating cold air are configured to circulate independently by forming the first and second casings in different spaces. A refrigerator provided with the cool air circulation device according to 2. 4. The refrigerator according to claim 2, wherein the first and second fans are formed by a centrifugal fan having a mountain-shaped side section. 5. The cold air guide passage is formed in a diffuser shape, and the cold air passing through the end portion thereof is formed so as to flow into the entire surface of each inlet portion of the first and second evaporators. A refrigerator provided with the cold air circulation device according to claim 2. 6. The refrigerator according to claim 2, wherein the height of the first fan is higher than that of the second fan.