JP2003028551A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a walk-in refrigerator is more difficult to cool compared with a walk-in deep freezer. SOLUTION: A refrigerator is provided at an upper part with the walk-in deep freezer (6) and a cooler (20), and at a lower part with the walk-in refrigerator (9). Cold air generated at the cooler (20) is circulated to the walk-in refrigerator (9) and the walk-in deep freezer (6). The refrigerator is provided with a damper (34) to open and close a flow of the cold air to the walk-in refrigerator (9); and a control device (40) to bring a compressor (43) into a stop state, bring the cold air blower (21) into an operation state, and bring the damper (34) into an opening state when the walk-in deep freezer (6) is cooled to temperature lower than a given walk-in deep freezer temperature, and the walk-in refrigerator (9) is not cooled to temperature lower than a given walk-in refrigerator temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating temperature sensor for detecting a refrigerating compartment temperature, a freezing temperature sensor for detecting a refrigerating compartment temperature, a compressor provided at the bottom of a refrigerator main body, and A refrigerator provided with a cool air blower provided in the vicinity of a cooler provided and a damper for opening and closing a duct for circulating the cool air generated in the cooler by the cool air blower between the refrigerating room and the freezing room. It is about.

Further, the present invention relates to a refrigerator having a freezer compartment and a cooler in an upper part, a refrigerating compartment in a lower part, and circulating cold air generated in the cooler by a cool air blower to the refrigerating compartment and the freezing compartment. It is a thing.

[0003]

2. Description of the Related Art Conventionally, a compressor is turned on in this type of refrigerator.
At the time of cooling, cold air is circulated in both the refrigerating chamber and the freezing chamber to cool both chambers.

Further, in this refrigerator, the refrigerating room is cooled to a predetermined refrigerating room temperature earlier than the freezing room.
design.

When the refrigerating compartment reaches a predetermined refrigerating compartment temperature, the damper is closed to prevent cold air from flowing into the refrigerating compartment.

Therefore, only the freezer compartment is cooled thereafter.

When the freezer compartment reaches a predetermined freezer compartment temperature, the compressor is turned off.

When the freezing room temperature rises again to a predetermined value (cooling start freezing room temperature), the compressor is turned on and cooling is performed.

[0009]

As described above, since the cooling ON / OFF is controlled on the basis of the freezing room temperature, when the freezing room is below the cooling start freezing room temperature, the refrigerating room temperature is The cooling operation was not performed even when the temperature rose significantly.

The present invention provides a refrigerator capable of accurately controlling the temperature of a refrigerating room.

In the conventional refrigerator, when the temperature of the refrigerating compartment reaches a predetermined refrigerating compartment temperature, the damper is closed to prevent cold air from flowing to the refrigerating compartment. And after this, until the freezer reaches the predetermined freezer temperature,
A cooling operation is performed. During this period, the upper side of the damper is
The cool air of the cooler comes into contact with the air in the refrigerating room below.
Therefore, if this state continues for a long time, there is a high risk that the damper will freeze due to the temperature difference between the two airs. In order to shorten this period, the amount of cold air that flows into the refrigerating chamber during cooling may be reduced. Then, when the refrigerating compartment is sufficiently cooled, the freezing compartment is also cooled, and the period for performing the cooling operation with the damper closed is shortened. However, in this case, there is a risk of insufficient cooling of the refrigerating compartment and the refrigerating compartment may not be cooled to a predetermined temperature.

The present invention prevents the damper from freezing,
It is intended to provide a refrigerator that corrects the insufficient cooling of the refrigerating room.

[0013]

According to the present invention, a refrigerating temperature sensor (41) for detecting a refrigerating room temperature, a freezing temperature sensor (42) for detecting a freezing room temperature, a compressor (43), and a cool air blower are provided.
In the refrigerator provided with (21) and a damper (34) for opening and closing a duct for circulating the cold air generated in the cooler (20) by the cold air blower (21) to the refrigerating compartment (9), When the temperature sensor (42) detects that the freezer compartment (6) is cold, and the refrigeration temperature sensor (41) detects that the refrigerating compartment (9) is not cold, the compressor (43) Is provided in a stopped state, the cold air blower (21) is in an operating state, and the damper (34) is in an open state, and a control device (40) is provided.

Further, according to the present invention, a freezer compartment (6) and a cooler (20) are provided at an upper portion, and a refrigerating compartment (9) is provided at a lower portion, and a cool air blower
The cold air generated in the cooler (20) by (21) is stored in the refrigerating chamber.
(9) In the refrigerator circulated to the freezing room (6), a damper (34) for opening and closing the flow of the cold air to the refrigerating room (9)
And, the freezer compartment (6) is cooled below a predetermined freezer temperature, and
When the refrigerating compartment (9) is not cooled below a predetermined refrigerating compartment temperature, the compressor (43) is stopped, the cold air blower (21) is in an operating state, and the damper (34) is in an open state. A device (40) is provided.

Further, according to the present invention, a refrigerating temperature sensor for detecting the temperature of the refrigerating chamber, a freezing temperature sensor for detecting the temperature of the freezing chamber, a compressor provided at the bottom of the refrigerator body, and a rear portion of the freezing chamber are provided. In a refrigerator provided with a cool air blower provided in the vicinity of the cooler, and a damper for opening and closing a duct for circulating the cold air generated in the cooler by the cool air blower between the refrigerating room and the freezing room, When the freezing temperature sensor detects a state where the freezing compartment is cold, and when the refrigeration temperature sensor detects a state where the refrigerating room is not cold, the compressor is stopped but the cold air blower is operated and the damper is used. It is characterized in that a control device for controlling so as to open is provided.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view for explaining cold air circulation in a freezer. FIG. 2 is a diagram for showing the cold air circulation on the back side of the refrigerator when viewed from the front side. In FIG. 2, the damper is closed and the cold air is circulated only in the freezer compartment. In addition, in this figure, "blowing" has shown the cold air which flows in the blowing outlet direction to a freezer. Also,
"Return" indicates cold air returning from the freezer to the cooler. FIG. 3 is a vertical cross-sectional view showing the cold air circulation in the refrigerating compartment.
In FIG. 3, the arrow indicating the cold air circulation on the freezer side is shown in FIG.
I omit it because it is the same as. FIG. 4 is a view for showing the cold air circulation on the rear side of the refrigerator when viewed from the front,
FIG. 4 shows a case where the damper is opened and cold air circulates in both the freezing compartment and the refrigerating compartment. In addition, in this figure, "blowing" has shown the cold air which flows into the blowing outlet of a freezer compartment and a refrigerating compartment. Moreover, "return" has shown the cold air which returns to a cooler from a freezer compartment and a refrigerator compartment.

The refrigerator main body 1 comprises a plurality of food storage rooms each having a front door. The refrigerator main body 1 is composed of an outer box 2, an inner box 3 and a heat insulating material 4 such as urethane foam filled between the two boxes.

The inside of the refrigerator main body 1 is partitioned by a partition wall 5 having a heat insulating function, and a freezing chamber 6 whose front opening can be closed by a rotatable freezing chamber door 7 which can be opened and closed above the partition wall 5. Is formed. Below the partition wall 5, a refrigerating compartment 9 whose front opening can be closed by a rotatable refrigerating compartment door 8 which can be opened and closed.
Is formed. Each of the above doors is constructed by filling a heat insulating material such as urethane foam between an outer door box made of a steel plate and an inner door box made of a hard resin material.

A shelf board 10 on which frozen foods can be placed is provided in the freezer compartment 6, and ice is provided at the top of the refrigerating compartment 9 on a partition plate to store the foods at about -1 degree. A greenhouse 11 is formed. The ice greenhouse 11 has a bottom wall of the partition plate and both side walls of the slide storage container 12 made of a synthetic resin material which can be put in and taken out along both side walls of the inner box 3 of the main body 1, and the ice greenhouse 11 of the ice greenhouse 11. A door 13 that can be opened and closed is provided on the front surface.

Further, under the ice greenhouse 11, there are provided three shelves 14 on which foods can be placed at predetermined intervals, and a vegetable storage chamber 15 is arranged under the lowermost shelves 14. To do. The vegetable storage chamber 15 is provided with a slide-type storage container 16 having a front door that can be opened and closed.

A compressor constituting a refrigeration cycle unit is provided at the bottom of the refrigerator main body 1 behind the vegetable storage chamber 15, and a common duct 22 behind the freezing chamber 6 is provided with a compressor for the freezing chamber 6. A cooler 20 is provided over substantially the entire width of the left and right sides, and a cool air circulation blower 21 is provided near the top of the cooler 20.

A first circulation duct 23, which communicates with the common duct 22, is formed on the left and right sides of the partition wall 5, and the cold air generated in the cooler 20 is used for the cold air circulation. The blower 21 blows the air from the outlet 24 into the freezer compartment 6 to cool the frozen food in the freezer compartment 6. The cold air thereafter returns in two, one of which is the common duct 22 through the suction port 25 in the lower part of the freezer compartment 6.
A cold air circulation path is formed so as to return to the common duct 22 via the suction port 26 and the first circulation duct 23 opened at the upper end of the front end of the partition wall 5.

A second circulation duct 30 is formed between the left and right intermediate portions of the partition wall 5, that is, between the first circulation ducts 23. The second circulation duct 30 is for taking in cool air from the refrigerating chamber 9 through a suction port 31 opened at the lower front end of the partition wall 5 and returning it to the common duct 22 through a port 32. .

Further, in the rightmost part of the back surface of the freezing compartment 6,
A third circulation duct 33 that is separated from the common duct 22 is formed, and the cool air generated in the cooler 20 is blown by the cool air circulation blower 21 through the third circulation duct 33 and the damper 34 to the rear surface of the refrigerating chamber 9. It is guided to the fourth circulation duct 35 formed in the above and blown out to the refrigerating chamber 9 through the blowout port 36.

Therefore, when the damper 34 is open, the cool air generated in the cooler 20 is guided to the third circulation duct 33 and the fourth circulation duct 35 by the cool air circulation blower 21 and is passed through the air outlet 36. To the refrigerating compartment 9 to cool the food in the refrigerating compartment 9, and then the suction port 31
Further, it is guided to the second circulation duct 30 and returned to the common duct 22 through the port 32. Further, the cool air generated in the cooler 20 is blown out to the freezing compartment 6 from the outlet 24 by the blower 21 for the cold air circulation and is returned to the circulation duct 23, so that the freezing compartment 6
The food inside and in the refrigerating compartment 9 will be cooled.

Next, the control of the refrigerator will be described with reference to FIG. Reference numeral 40 denotes a control device including a microcomputer that controls the present refrigerator as a whole. The control device 40 includes a refrigerating temperature sensor 41 that detects the temperature of the refrigerating chamber.
Also, the compressor 43, the fan motor 44 of the cool air circulation fan 21, and the damper motor 45 of the damper 34 are controlled based on the output of the freezing temperature sensor 42 that detects the temperature of the freezing chamber.

The circulation of cold air and the control of the compressor 43 and the like will be described. First, when the refrigerating temperature sensor 41 and the freezing temperature sensor 42 detect that neither the refrigerating chamber 9 nor the freezing chamber 6 has cooled to the respective predetermined temperatures, the compressor 4
3 and the fan motor 44 of the cool air circulation blower 21 are in an operating state, and the damper motor 45 is controlled to open the damper 34. The control device 40 controls.

Therefore, the compressor 43 provided at the bottom of the refrigerator main body 1 sucks and compresses the refrigerant to make it into high temperature and high pressure, and the high temperature and high pressure gaseous refrigerant from the compressor 43 is condensed by the condenser, and the capillary tube. The cooler 20 vaporizes the low-temperature low-pressure refrigerant by the cooler 20, and the cool air produced by being cooled by the cooler 20 is blown by the cool air circulation blower 21.
It blows off from 4 to the freezer compartment 6 to cool the frozen food in the freezer compartment 6. The cool air in the freezer compartment 6 thereafter is sucked into the common duct 22 via the suction port 25, and the cool air in the freezer compartment 6 is sucked into the common duct 22.
6 and the first circulation duct 23 through the common duct 22
Circulate cold air back to.

Since the damper 34 is open at this time, the cool air generated in the cooler 20 is guided by the blower 21 to the third circulation duct 33 and the fourth circulation duct 35, and the refrigerating chamber is blown through the blowout port 36. Blow out to 9 and the refrigerating room 9
After cooling the food inside, cool air is circulated so that it is guided from the suction port 31 to the second circulation duct 30 and returned to the common duct 22 via the port 32.

Then, the refrigerating temperature sensor 41 detects that the refrigerating chamber 9 has cooled down to, for example, minus 1 ° C.
In the case of FF (this OFF state is maintained until it reaches plus 6 ° C.), the control device 40 maintains the operating state of the compressor 43 and the fan motor 44 of the cool air circulation blower 21, but the damper motor 45. Is controlled to close the damper 34. Therefore, the forced cooling to the refrigerating chamber 9 is stopped.

The cool air is not supplied to the refrigerating chamber 9, but the cool air generated in the cooler 20 is supplied to the blower 2 as described above.
1 blows out from the outlet 24 to the freezing compartment 6 and
The frozen food inside is cooled, and the cold air thereafter is passed to the common duct 22 via the suction port 25, and the common duct 22 via the suction port 26 and the first circulation duct 23 opened at the upper end of the front end of the partition wall 5. Cold air circulates back to.

When the freezing temperature sensor 42 detects that the freezing chamber 6 has cooled sufficiently, for example, minus 27 ° C. and is turned off (this OFF state is maintained until minus 18 ° C. is reached). The controller 40 controls the fan motor 4 of the compressor 43 and the cooler air blower 21.
4 is stopped and the damper motor 45 is controlled to control the damper 3
4 is controlled to be closed.

Therefore, the forced cooling of the freezer compartment 6 is also stopped. For this reason, and the freezing temperature sensor 4
When the refrigerating temperature sensor 41 detects that the refrigerating chamber 9 has risen in temperature under the condition that 2 is detecting the cold state of the freezing chamber 6 and has reached, for example, plus 6 ° C., the control device 40 Maintains the compressor 43 in a stopped state, but also operates the fan motor 44 of the cool air circulation blower 21 and controls the damper motor 45 to open the damper 34.

Therefore, since the damper 34 is opened and the cooler 20 is still cold, the cool air is blown by the blower 21 to the third circulation duct 33 and the fourth circulation duct 3.
5 and blows it out to the refrigerating compartment 9 through the outlet 36 to cool the food in the refrigerating compartment 9 and then guides it from the suction inlet 31 to the second circulation duct 30 and through the outlet 32 to the common duct 22.
Circulate cold air back to. As a result, the refrigerator compartment 9
The food inside can be cooled. That is, even under the condition where the operation rate of the refrigeration cycle unit is low, sufficient cooling of the refrigerating chamber 9 can be ensured.

As described above, according to the present application, the control device 40 stops the compressor 43 when the refrigerating temperature sensor 42 detects a cold state and the refrigerating temperature sensor 41 detects a non-cooling state. However, since the blower 43 is operated and the damper 34 is controlled to open, the problem that the refrigerating chamber 9 is difficult to cool can be solved. As described above, the present invention detects the cold state of the freezing temperature sensor, and when the refrigerating temperature sensor detects the non-cooling state, the controller stops the compressor but operates the cold air blower and the damper. Since it is controlled to open, it is possible to solve the problem that the refrigerating room is difficult to cool.

Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention includes the above-described various modifications without departing from the spirit thereof. It is intended to cover alternatives, modifications or variations.

[0037]

As described above, according to the present invention, the problem that the refrigerating chamber is difficult to cool can be solved. Also,
According to the present invention, the refrigerating compartment can be cooled without significantly increasing the amount of cold air flowing into the refrigerating compartment.

[Brief description of drawings]

FIG. 1 shows a longitudinal sectional view of a refrigerator for showing cold air circulation in a freezer.

FIG. 2 shows a diagram for showing cold air circulation as viewed from the front.

FIG. 3 shows a longitudinal sectional view of a refrigerator for showing cold air circulation in a refrigerating compartment.

FIG. 4 shows a diagram for showing cold air circulation as viewed from the front.

FIG. 5 shows a control block diagram.

[Explanation of symbols]

1 Refrigerator body 6 freezer 9 Refrigerator 21 Blower for cold air circulation 22 common duct 23 First Circulation Duct 30 Second circulation duct 33 Third Circulation Duct 35 Fourth Circulation Duct 34 damper 40 control device 41 Refrigeration temperature sensor 42 Freezing temperature sensor 43 Compressor

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3L045 AA02 CA02 CA03 DA02 EA02                       GA07 HA01 LA05 LA09 MA02                       NA07

Claims (2)

[Claims] 1. A refrigeration temperature sensor for detecting the temperature of a refrigeration room.
(41) and a freezing temperature sensor (42) for detecting the temperature inside the freezing room
A compressor (43), a cool air blower (21), and the cold air blower (2
In a refrigerator provided with a damper (34) for opening and closing a duct for circulating the cold air generated in the cooler (20) by the 1) in the refrigerating compartment (9), the freezing temperature sensor (42) is a freezing compartment (42). When the 6) detects a cold state, and the refrigeration temperature sensor (41) detects a cold state of the refrigerating compartment (9), the compressor (43)
To the stop state, the cold air blower (21) in the operating state,
A refrigerator provided with a control device (40) for opening the damper (34). 2. A freezer compartment (6) and a cooler (20) are provided at an upper portion, and a refrigerating compartment (9) is provided at a lower portion, and cold air generated by the cooler (20) is cooled by a cool air blower (21). A refrigerator that circulates between a refrigerating compartment (9) and the freezing compartment (6), wherein a damper that opens and closes the flow of the cold air to the refrigerating compartment (9)
(34) and, when the freezing room (6) is cooled below a predetermined freezing room temperature, and when the refrigerating room (9) is not lower than a predetermined refrigerating room temperature,
A control device (4) in which the compressor (43) is stopped, the cold air blower (21) is operated, and the damper (34) is opened.
A refrigerator provided with (0) and.