JP2003121043A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide layout of a storage room of a superior-usability with an ice making room disposed in a corner of a refrigerating room space and to respond to diversified users' needs by efficiently disposing a cooling air duct mechanism to the storage room and cooling equipment. SOLUTION: This refrigerator comprises a refrigerating room 5 cooled by a refrigeration cooler 21 and a cooling fan 22 disposed in the upper part of a refrigerator body, a freezing room 9 cooled by a freezing cooler 27 and a freezing fan 28 disposed in the lower part of the body, a vegetable room 7 provided between the refrigerating room and the freezing room, the ice making room 12 disposed in the corner of the bottom part of the refrigerating room with its heat insulated and partitioned, and an ice making fan 31 provided in the rear part of the ice making room. This refrigerator is characterized in that the cooling air produced by the refrigeration cooler is sent to the ice making room via a duct 30 and the ice making fan 31, and a cooling air duct including the freezing fan and a return duct from the ice making room are jointly provided in the rear surface of the vegetable room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator / cooler compartment structure, and more particularly to an icemaker compartment structure and control method for a refrigerator in which an ice making container is arranged in a refrigerator compartment.

[0002]

2. Description of the Related Art In recent years, refrigerators have tended to have a large storage capacity in combination with diversification of life.
Since the number of opening and closing of the door is large and the frequency of use is high, a refrigerating room with the largest storage capacity of the refrigerator is arranged above the refrigerator body.
A vegetable compartment and a freezer compartment are located underneath it, and an ice-making compartment equipped with an ice-making device between the vegetable compartment and the freezer compartment and temperature switching that can switch the compartment from multiple temperatures to the temperature at which the vegetables are stored. Many have set up rooms independently.

Since a large number of storage chambers having different storage temperatures are provided in this manner, a single cooler is conventionally used, but a cooler dedicated to each temperature zone, such as a cooler for freezing temperature, is used. Two coolers such as a cooler for refrigerating temperature are installed corresponding to each temperature chamber.

In the cooling system having such a plurality of coolers, the coolers corresponding to the respective temperatures of the storage chambers are arranged near the back surface of the storage chambers in terms of cooling efficiency for the storage chambers. ing. That is, the refrigerating cooler is arranged in the vicinity of the refrigerating compartment, and the vegetable compartment whose temperature is slightly higher than the refrigerating compartment temperature is also arranged in the vicinity of the refrigerating compartment. In addition to the above, the ice making chamber and the temperature switching chamber, which also reach the freezing chamber temperature, are arranged near the freezing chamber.

[0005]

However, in the refrigerator of the above-mentioned form, the ice making room is arranged at the lower part of the vegetable room, and it is located below even in the layout of the entire refrigerator, so the ice is taken out. Sometimes it was necessary to bend over, and it was especially inconvenient when the ice was used frequently, such as in summer.

The external size of the refrigerating room is close to the width, depth, and height dimensions due to installation conditions such as kitchen conditions in Japan, which limits the expansion of the storage space. The demand for improved usability is becoming stronger and stronger.

The present invention has been made by paying attention to this point, and in order to meet diversifying user needs, an ice making chamber is provided as a refrigerating chamber by an efficient arrangement of a cool air duct mechanism and a cooling device in the storage chamber. It provides a convenient storage room layout that is located in a corner of the space.

[0008]

According to a first aspect of the present invention, there is provided a refrigerating chamber arranged at an upper portion of a refrigerator body and cooled by a refrigerating fan and a refrigerating fan, and a refrigerating chamber arranged at a lower portion of the refrigerator body. A freezer compartment cooled by a cooler and a freezing fan, a vegetable compartment provided in a storage space between the refrigerating compartment and the freezing compartment, and an automatic ice making unit arranged in a heat insulating section at one corner of the bottom of the refrigerating compartment. An ice making room equipped with a device,
An ice making fan provided at the back of the ice making chamber, which blows the cold air generated by the freezing cooler to the ice making chamber through the duct and the ice making fan, and returns from the duct including the freezing fan and the ice making chamber. It is characterized in that a duct is provided side by side on the back side of the vegetable compartment.

With this configuration, the height of the ice making chamber is raised, and when the ice is used, the posture does not lean forward, the ice can be taken out easily, and the ice making chamber is located below the refrigerator body. Even if a duct is extended to introduce cold air from the freezing cooler to the upper ice making room, by installing the freezing cooler and the cooling fan, and the cool air duct and the return duct on the back of the storage room, Further, the shape of the back surface of each storage chamber can be flattened without impairing the volumetric efficiency inside, and the storage space can be effectively utilized.

The invention of claim 2 is characterized in that the cold air generated by the refrigerating cooler is blown directly to the ice making chamber by the fan for the ice making chamber through the cold air duct. Is characterized in that the cool air generated by the freezing cooler and blown into the freezing compartment is blown into the ice making compartment by the ice making compartment fan via the cold air duct.

With this configuration, low-temperature cold air can be surely blown to the ice making chamber separated from the refrigerating cooler.

According to a fourth aspect of the present invention, during the ice making operation, the ice making room fan is operated except during the defrosting operation of the freezer compartment cooler.

According to this structure, the ice making fan can be constantly driven to accelerate the ice making speed, and there is no influence of the temperature of the refrigerating cooler, which is relatively high during the defrosting operation, on the ice making chamber. Can prevent the temperature rise of
Does not impair the speed of ice making.

According to a fifth aspect of the present invention, there is provided a refrigerating cooling mode in which a refrigerant is supplied to the refrigerating cooler to cool the refrigerating compartment and the vegetable compartment, and a refrigerating system in which a refrigerant is supplied to cool the freezing compartment and the ice making compartment. The fan for an ice making room is characterized by being operated at a low speed in the refrigerating and cooling mode and operating at a high speed in the freezing mode.

According to this structure, the ice making chamber can be cooled efficiently and reliably, and the ice making chamber fan can be operated in a power saving manner.

A sixth aspect of the present invention is characterized by comprising a rapid ice making mode for rapidly cooling the ice making chamber, wherein the ice making chamber fan is operated at high speed for a predetermined time during the rapid ice making mode. Can make ice efficiently.

According to a seventh aspect of the present invention, there is provided a refrigerating and cooling mode in which a refrigerant is passed through a refrigerating cooler to cool a refrigerating compartment and a vegetable compartment, and a freezing in which a refrigerant is passed through a freezing cooler to cool a freezing compartment and an ice making compartment. A means for switching between cooling modes and a rapid ice making mode for rapidly cooling the ice making chamber are provided, and during the rapid ice making mode, it is characterized by increasing the refrigerating capacity of the freezing cooler, and quick ice making is performed. be able to.

The invention of claim 8 is characterized in that, while the ice making operation is stopped, the fan for the ice making room is stopped when the ice making room is at a predetermined temperature or lower. It can be saved in the state, and the operation of the ice making room fan can be saved in power.

The invention of claim 9 is characterized in that the fan for the ice making chamber is operated during the pump down mode for collecting the refrigerant from the refrigerator cooling device.

According to this structure, the amount of heat exchange between the air in the freezer compartment and the freezing cooler can be increased by operating the fan for the ice making compartment, so that the refrigerant can be quickly recovered.

[0021]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the refrigerator main body (1) showing an arrangement state of each storage room without a door, and an outer box.
A storage space is formed by an inner box (3) provided inside (2) via a heat insulating material (not shown), and this is divided into a plurality of storage chambers by a heat insulating partition wall.

(5) is a refrigerating room arranged at the top of the refrigerator main body for convenience of confirmation and storage / removal of indoor stored items because it is most frequently used in each storage room, and a hinge device (not shown) is provided. The front opening is closed by a door pivotally supported on one side of the main body.

A vegetable compartment (7) for accommodating vegetables or the like stored at a temperature slightly higher than the refrigerating room temperature is formed in the lower part of the refrigerating compartment (5) through a partition plate (6).

Below the vegetable compartment (7), there is a freezing compartment (9) for storing frozen foods via an insulating partition wall (9). The freezer compartment (9) is divided into two stages, upper and lower, and a quick freezing corner (10) is provided on the upper stage.

Although the structure of the vegetable compartment (7) and the freezer compartment (9) is not shown in the drawing, the front opening of the compartment is closed by a door and a frame strip extending toward the storage compartment is provided inside the door. The storage container is mounted on the upper surface of the frame, and the storage container is slid by the engagement of a roller (not shown) attached to the rear end of the frame and a rail member provided on the inner side wall of the storage container. It is provided so that it can be pulled out.

An ice making chamber (12) partitioned by a heat insulating wall (11) is formed at a corner below the refrigerating chamber (5) space. This ice making chamber (12) was fitted with an automatic ice making device (14) for receiving water from a water supply tank (13) provided in the refrigerating chamber (5) above the ice making chamber (14) and making ice. An ice storage box that receives ice and stores ice is arranged so as to be freely drawn out, and is cooled to a freezing temperature by receiving cold air from a freezing cooler (27) described later.

When the ice-making detection sensor (55) attached to the outer surface of the bottom of the ice-making tray detects −19 ° C., all the water in the ice-making tray is frozen and the ice-making is completed. Deem the ice-breaking operation to drop the ice in the ice tray into the ice storage container below. The ice removing is performed by turning the ice tray and controlling the rotation of one side end of the ice tray when the ice tray is rotated by 180 degrees, so that the ice tray is twisted to remove the ice.

Further, an ice detecting lever for detecting the amount of ice storage is provided, and the amount of ice is detected by moving it downward in the ice storage container before the ice removing operation. When the contact is made and the downward movement is not possible, the full ice state is detected, the ice releasing and the water supply operation thereafter are stopped, and the operation waits until the ice is taken out and the ice storage amount decreases.

In the refrigerating space on the side of the ice making chamber (12), there is an ice making chamber.
As in the case of (12), a temperature switching chamber (15) is provided which is thermally insulated. This temperature switching chamber (15) has a freezing temperature of -18 ° C, a soft freezing temperature of about -7 ° C, by controlling the cooling airflow by opening and closing a cold air damper (16) provided on the upper side wall of the ice making chamber (12) side. It has a chilled temperature of 0 ° C, and a multi-step temperature control from a refrigeration temperature of +1 to 2 ° C to a wine cooling temperature of about + 8 ° C, and is used by changing the temperature setting in the room as necessary. is there.

As shown in FIG. 7, each storage room has a refrigerating room temperature sensor (51) for detecting the temperature in the refrigerating room space and a freezing room (9).
Temperature sensor for freezing (52) that detects the temperature of ice, temperature sensor for ice making (53) that detects the temperature of ice making chamber (12), temperature switching chamber (15)
Based on the detection values of the switching room temperature sensor (57) that detects the temperature of the room and the outside air temperature sensor (58) that detects the outside air temperature, the control device
(40a) is a fan, a cool air damper (16), a compressor described later.
(41), etc. are operated to adjust the internal temperature.

As shown in FIG. 2, which is a front view of the rear side of each of the storage chambers shown in FIG. 1 in which the rear portion of each storage chamber is removed, cooling air (arrow) is supplied to each storage chamber. A vessel and a duct are provided.

That is, a refrigerating cooler (21) is arranged at the center of the rear surface of the refrigerating compartment (5), and a refrigerating fan (22) is provided above it. The refrigerating fan (22), and a freezing fan (28) and an ice making fan (31) which will be described later are inverter-controlled by the control device (40a), and the number of rotations is controlled by the temperature in the refrigerator, the operation mode, or the compressor (41). ) And variable. The front of the refrigeration fan (22) is provided with a cool air discharge port (23) to the upper part of the refrigerating compartment, and ducts (24) are formed from the upper part of the back surface of the rear of the refrigerating compartment to both sides in the vertical direction. A cool air outlet (25) to the inside of the refrigerator is provided at a predetermined interval position of (24), and for example, cool air is blown out at intervals of the storage shelves (17) in the refrigerator room (5) to cool the refrigerator room. I am trying.

With the above-described structure, the refrigerator for refrigeration is arranged on the rear surface of the refrigerating chamber having a large area, so that the capacity of the cooler can be increased and the cooling power can be increased. Since it can be cooled sufficiently, the action of removing moisture from the stored food can be reduced and the food can be prevented from drying.By using both sides as ducts, the interior and exterior can be flattened and the installation and storage space can be effectively used. it can.

Further, a cold air suction port (26) is provided on the lower rear surface of the refrigerating compartment (5) so that the cool air circulated in the refrigerating compartment is sucked and returned to the cooler (21).

A freezing cooler (27) is provided on the rear surface of the freezing compartment (9) below the refrigerator body. A freezing fan (28) is arranged above the freezing cooler (27) to blow cold air into the freezing compartment, and a part of the cold air is drawn upward from the duct (30) to the ice making room (12). It is configured such that it is guided to an ice making fan (31) provided at the back of the and is blown out into the ice making chamber (12).

Between the ice making fan (31) and the temperature switching chamber (15), as shown in FIG. 3, which is an enlarged cross-sectional view of the ice making chamber, a switching chamber duct (32) and a cold air damper (16) are provided. ) Is provided, part of the cold air from the ice making fan (31) is guided to the switching chamber duct (32) and blown into the temperature switching chamber (15) via the cold air damper (16).

The cold air damper (16) for the temperature switching chamber is
It is buried in the partition between the ice making chamber (12) and the temperature switching chamber (15), and does not reduce the storage space. In addition, the ice making room (1
Since the duct (30) to 2) can be used, it is not necessary to provide a duct space dedicated to the temperature switching chamber (15), and the storage space can be effectively used.

Cold air inlets (34) and (35) are formed in the ice making chamber (12) and the temperature switching chamber (15), respectively, and the vegetable chamber (7)
Ice duct return duct (36) over the freezer (9) from the back of the
Also, a switching chamber return duct (37) is provided to return the circulating cold air to the freezing cooler (27).

These ducts for circulating the cool air are shown in FIG. 4 which is a vertical sectional view, FIG. 5 which is a sectional view taken along the line AA of FIG. 2 and FIG. 6 which is a sectional view taken along the line BB. As shown, the cold air duct (30) to the ice making chamber, the return ducts (36) (37) from the ice making chamber and the switching chamber, and the freezing cooler (27)
And a refrigeration fan (28) and the return ducts (36) (37)
Are installed in parallel on the back of the freezer compartment (9) and vegetable compartment (7).

With this configuration, the unevenness on the back surface of the storage compartment is minimized to reduce the protruding portion into each compartment, and the vegetable compartment
(7) and the vegetable compartment (9) are made more efficient by utilizing the volume utilization efficiency and the indoor space is made easier to use.By the parallel arrangement as described above, each duct has a linear and simple structure, Efficient cooling air can be blown without causing resistance loss due to bending.

Further, on the rear surface of the refrigerator main body (1) extending from the vegetable compartment (7) to the temperature switching compartment (15), a freezing cooler (27), a freezing fan (28) or each duct (30) (36). A recess (39) is provided in a position parallel to the above, and a control circuit board (40) for controlling the operation of the refrigerator is disposed in this recess.

Next, the operation mode of the refrigerator will be described. FIG. 8 is a schematic diagram showing the refrigeration cycle of the present invention.

The high temperature refrigerant discharged from the compressor (41) installed in the machine room at the rear lower part of the freezing room (9) radiates heat in the condenser (43) and the flow path is controlled by the switching valve (42). The refrigerating cooler (21) or the freezing cooler (27) is cooled, and an alternating cooling operation is performed in which a refrigerating cooling mode and a freezing cooling mode described below are alternately performed.

The refrigerating / cooling mode is performed when the temperature of the refrigerating space becomes higher than the set temperature. In this mode, the switching valve (42)
To switch the refrigerant flow through the capillary tube (44),
The refrigerating cooler (21) evaporates to cool the refrigerating space. At this time, the refrigeration fan (22) is driven in synchronism with the switching of the refrigerant flow paths to blow cold air into the refrigerating space to cool it. The refrigerant gasified by heat exchange with the cooler returns to the compressor (40).

The freezing mode is executed when the temperature of the freezing space becomes higher than the set temperature. In this mode, the switching valve (42) is switched off, the refrigerant flow path is switched so that the refrigerant flows through the capillary tube (48), and the refrigerator / cooler (2
It evaporates in 7) and returns to the compressor (41) through the accumulator (45) and the check valve (46).

Then, in synchronization with the switching of the refrigerant flow path to the freezing / cooling device (27), the freezing fan (28) is operated at a normal rotation speed to cool the freezing space.

In the defrosting mode, the defrosting heater (47), such as a glass tube heater, arranged below the freezing / cooling device (27) is energized to defrost the freezing / cooling device (27). The defrosting mode is performed, for example, at the timing when the cumulative operating time of the compressor (41) has passed 8 hours, and is started when switching to the refrigerating mode. Then, the defrost sensor (56) attached to the refrigeration cooler (27) causes the refrigeration cooler (27) to reach a predetermined temperature, for example, 3 ° C.
When heated up, the defrosting mode ends and the cooling operation is resumed.

The rapid ice making mode is started by operating the buttons on the operation panel (54) provided on the surface of the refrigerator door, and the cold air damper (16) is fully opened to rotate the ice making fan (31) at high speed. It continues until the amount of cold air blown to the ice making chamber is increased to complete the ice making or the rapid ice making mode is released.

In the pump down mode, when switching between the refrigerating mode and the freezing mode, the switching valve (41) is closed to close the compressor.
By rotating (40) for a predetermined time, for example, 30 seconds, the refrigerant remaining in the refrigerating cooler (27) is recovered.

Next, the cooling mechanism of each storage chamber will be described.

The cold air cooled by the coolers (21) (27) is
Cooling fans for refrigeration and freezing above it (22)
(28) is blown into each storage room space,
As shown by the arrow, the blown-out cool air cools each storage chamber and repeats the circulation from the suction port back to the cooler to keep each storage chamber cooled to a predetermined set temperature.

In the refrigerator compartment (5), a refrigerator (21) for refrigeration
The cold air from the part is blown out to the upper surface of the refrigerating compartment by the refrigerating compartment (22), and the other is diverted to the ducts (24) formed on both sides of the rear surface of the refrigerating compartment, and the air is cooled in the vertical direction of the duct (24). The cool air is blown out into the refrigerating chamber from the cool air outlets (25) provided at intervals, and the cool air circulating in the refrigerating chamber repeats the cool air circulation cycle of returning from the suction port (26) to the cooler (21).

When the refrigerating room is cooled to a predetermined temperature, the operation of the refrigerating fan (22) is stopped, and when the room temperature rises above the predetermined temperature due to the stop of the cooling action, the fan (22 22) is driven to perform a cooling action by circulating cold air.

The cooling control of the freezing space is basically the same as that of the refrigerating room control, but when the cool air of the freezing cooler (27) is discharged to the freezing room (9) by the freezing fan (28). At the same time, it is guided to the ice making chamber (12) provided at one corner of the upper refrigerating compartment space by the air duct (30) provided upward from the center of the back surface of the vegetable compartment (7) above the freezing compartment.

Then, a part of the cold air from the freezing fan (28) is blown into the ice making chamber (12) by the rotation of the third fan for ice making (31) provided at the back of the ice making chamber. At the same time, a part of it is introduced into the adjacent temperature switching chamber (15) through the switching chamber duct (32) and the cool air damper (16) to cool it.

The cool air damper (16) controls the inflow amount of the cool air by changing the opening area of the cool air discharge port according to the set temperature, whereby the inside of the temperature switching chamber (15) is cooled to the above-mentioned freezing temperature or chilled temperature. It is kept in a predetermined temperature range.

The cold air that has cooled the ice making chamber (12) and the temperature switching chamber (15) is supplied to the ice making chamber return ducts (36) formed on both sides of the air blowing duct (30) on the rear surface of the vegetable chamber (7) and the switching chamber. Return to the freezing cooler (27) from the room return duct (37) and
The cold air circulation cycle in which the cold air that has circulated in (9) merges and is cooled again is continued.

The storage chamber provided on the side of the ice making chamber (12) is not limited to the temperature switching chamber as in the above embodiment,
It may be a dedicated room or a rapid cooling room having a chilled temperature lower than the refrigerating room temperature, and can be arbitrarily set and utilized as the cooling room.

Next, one modification of the present invention will be described.

<Modification 1> FIG. 9 is a schematic diagram showing the duct configuration described in the above-described one embodiment, and FIG. 10 is a schematic view showing the duct configuration of Modification 1.

In one embodiment of the present invention, as shown in FIG. 9, the cold air generated by the freezing cooler (27) is blown upward by the freezing fan (28) through the cold air duct (30). And is blown out to the ice making chamber (12) by the ice making fan (31), as shown in FIG.
The cold air generated from (27) is blown into the freezer compartment (9) by the freezing fan (28), and the air in the freezer compartment space is passed through the duct provided at the rear of the freezer compartment, and the ice making fan (31) makes the ice compartment. It is a structure that blows out to (12).

As shown in FIG. 11, the refrigerating cooler (2
The cold air generated by 7) may be blown directly into the ice making chamber (12) by the ice making fan (31) through the duct. In this case, the freezing fan (28) may be arranged below the freezing cooler (27). With this configuration, the freezing capacity of the freezing room (9) is improved and the ice making room is cooled surely. You can

<Modification 2> While the automatic ice making device is performing the ice making operation, the ice making fan (31) is operated except in the defrosting mode.
To drive.

When the defrosting operation is performed, the freezing cooler (2
In 7), the temperature becomes relatively high, and if the air in the high temperature atmosphere is blown into the ice making room (12), the room temperature will rise significantly,
Not only will it take longer to make ice, but the stored ice will melt. In the refrigerating mode, the freezing cooler (27) is not cooled, but the cooler temperature is kept low, and the ice making chamber (12) is continuously cooled by operating the ice making chamber fan (31). To be done.

Therefore, in the modes other than the defrosting mode, by operating the ice making chamber fan (31) even in the freezing mode, the ice making time can be shortened and the internal cold storage temperature can be reliably maintained. it can.

<Modification 3> The ice making fan (31) is controlled to operate at a low speed during the refrigerating mode, and the ice making chamber fan (31) is controlled to operate at a high speed during the freezing mode.

Since the refrigerating cooler (27) is not cooled during the refrigerating mode, the difference from the normal high speed operation is relatively small even when the ice making fan (31) is rotated at high speed or at low speed. Therefore, by operating the ice making fan (31) at a low speed during the refrigeration mode, power can be saved and the ice making chamber can be used.
(12) can be reliably cooled.

<Modification 4> When the user sets the quick ice making mode on the operation panel (54), the quick freezing mode is started for an arbitrary predetermined time, for example, 8 hours. And the water tank (1
Continue to operate the ice making fan (31) at high speed continuously until it detects that the water has run out in 3) or the ice storage capacity is full. Therefore, ice making can be performed quickly and effectively.

<Fifth Modification> When the user sets the rapid ice making mode on the operation panel (54), if the set temperature of the freezer compartment (9) is set to -20 ° C. in this case, the temperature is lowered by a predetermined temperature, for example, 3K. .

The ice making fan (31) is operating in synchronization with the compressor (41), and when the set temperature of the freezer compartment (9) is lowered, the actual room temperature becomes higher than the set temperature, and Machine (41)
Will increase the rotation speed to increase the refrigeration capacity. As a result, the rotation speed of the ice making fan (31) operating in synchronization with the compressor (41) is automatically increased, and the refrigerating capacity is increased, so that quick ice making can be performed.

<Modification 6> While the ice making operation is stopped, the rotation speed of the ice making fan (31) is adjusted to maintain the room temperature of the ice making room (12). In other words, it is sufficient if the stored ice can be stored in a state where it does not melt while the ice making operation is stopped.By reducing the rotation speed of the ice making fan (31), the ice making chamber (12) can be cooled efficiently and the ice can be kept in good condition. It is possible to save the power by saving the ice-making fan (31) in an efficient manner while saving it in the. At this time, if the temperature of the ice making room is low, the ice making fan (31) may be stopped.

<Modification 7> During the pump down mode, the ice making fan (31) is operated. The pump down is performed at the time of switching the cooling mode, and it is better to recover the refrigerant in the refrigerating cooler (27) to the compressor (41) earlier. By operating the ice making fan, the amount of heat exchange between the air in the freezing space and the freezing cooler can be increased, so that the refrigerant can be quickly recovered.

[0073]

As described above, the ice taking-out height position of the ice making chamber is near the waist line of the user, and when the ice is used, the posture does not lean forward and the ice can be taken out easily. In addition to improving the usability, the freezing cooler, the cooling fan, and the cold air duct can be installed even if a duct is extended to introduce the cool air from the freezing cooler located below the main body into the upper ice making chamber. By installing a return duct and a return duct on the back side of the storage room, the back surface shape of each storage room can be flattened without impairing the volumetric efficiency in the storage, and the storage space can be effectively used.

[Brief description of drawings]

FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention with a door removed.

FIG. 2 is a front view showing a state in which a back surface portion of the storage chamber in FIG. 1 is removed.

FIG. 3 is a cross-sectional view showing an ice making chamber portion in FIG.

FIG. 4 is a vertical cross-sectional view showing a duct configuration of a freezing space portion in FIG.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a cross-sectional view taken along the line BB of FIG.

FIG. 7 is a control block diagram showing an embodiment of the present invention.

FIG. 8 is a schematic view of a refrigeration cycle showing one embodiment of the present invention.

FIG. 9 is a schematic view of a cold air duct showing an embodiment of the present invention.

FIG. 10 is a schematic view of a cold air duct showing another embodiment of FIG. 9.

FIG. 11 is a schematic view of a cold air duct showing still another embodiment of FIG. 9.

[Explanation of symbols]

1 ... Refrigerator body 5 ... Refrigerator room 7 ... Vegetable room
9 ... Freezing room 12 ... Ice making room 14 ... Automatic ice making device 15 ... Temperature switching room 16 ... Cold air damper 21 ... Refrigerating cooler 22 ... Refrigerating fan 23 ... Cold air outlet 24 ... Duct 25 ... Cold air outlet 27 ... Freezing Cooler 28 ... Freezing fan 30 ... Duct 31 ... Ice making fan 34, 35 ... Cold air inlet 36 ... Ice making room return duct 37 ... Switching room return duct

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuaki Godo             No. 6 Ota-Toshiba-cho, Ibaraki City, Osaka Prefecture Stock Association             Company OEC F term (reference) 3L045 AA02 BA01 CA04 DA02 EA01                       HA02 HA07 LA10 NA03 PA02                       PA04

Claims (9)

[Claims] 1. A refrigerating chamber, which is cooled by a refrigerating cooler and a refrigerating fan arranged at an upper portion of a refrigerator main body,
A freezer compartment that is cooled by a freezing cooler and a freezing fan arranged at the bottom of the refrigerator body, a vegetable compartment provided in a storage space between the refrigerating compartment and the freezing compartment, and a bottom portion of the refrigerating compartment. It consists of an ice making room equipped with an automatic ice making device that is arranged in a heat insulating section in one corner, and an ice making fan provided at the back of this ice making room, and the cold air generated by the freezing cooler is made into ice through the duct and the ice making fan. A refrigerator characterized in that the duct including the freezing fan and the return duct from the ice making room are provided together in the rear part of the vegetable room while sending air to the room. 2. The refrigerator according to claim 1, wherein the cold air generated by the freezing cooler is blown directly to the ice making chamber by the ice making fan through the cool air duct. 3. The refrigerator according to claim 1, wherein the cold air generated by the freezing cooler and blown into the freezing compartment is blown into the ice making compartment by the ice making fan through the cold air duct. 4. The refrigerator according to claim 1, wherein during the ice making operation, the ice making fan is operated except during the defrosting operation of the freezing cooler. 5. A refrigerating / cooling mode in which a refrigerant is passed through a refrigerating cooler to cool a refrigerating compartment and a vegetable compartment, and a freezing / cooling mode in which a refrigerant is passed through a freezing cooler to cool a freezing compartment and an ice making compartment are switched. The refrigerator according to any one of claims 1 to 4, further comprising: means for operating the ice-making chamber fan at a low speed in a refrigerating / cooling mode and at a high speed in a freezing / cooling mode. 6. The rapid ice making mode for rapidly cooling the ice making chamber is provided, and the fan for the ice making chamber is operated at a high speed for a predetermined time in the rapid ice making mode, according to any one of claims 1 to 5. Refrigerator described. 7. A refrigerating / cooling mode in which a refrigerant is passed through a refrigerating cooler to cool a refrigerating compartment and a vegetable compartment, and a freezing / cooling mode in which a refrigerant is passed through a refrigerating cooler to cool a freezing compartment and an ice making compartment are switched. 7. The refrigerator according to claim 1, comprising means and a rapid ice making mode for rapidly cooling the ice making chamber, and increasing the refrigerating capacity in the freezing mode during the rapid ice making mode. 8. The refrigerator according to claim 1, wherein the ice making chamber fan is stopped when the temperature of the ice making chamber is equal to or lower than a predetermined temperature while the ice making operation is stopped. 9. The refrigerator according to claim 8, wherein the fan for the ice making chamber is operated during the pump down mode in which the refrigerant is recovered from the refrigerator cooling device.