JP3307885B2 - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an inside part of a storing chamber to be properly cooled even in the case that a door is opened. SOLUTION: At a freezing chamber F, it can be selectively cooled to a freezing temperature of about -50 deg.C under a freezing operation and to a storing temperature of about -20 deg.C at a storing chamber S. In the case that a door at the storing chamber S is opened, only fans FM2, 3 at the storing chamber and the circulation fans FM4, 5 are stopped. In the case that a door at the freezing chamber F is opened and if the freezing operation is being carried out, the temperature within the freezing chamber F is sufficiently low and it can be utilized for the cooling of the storing chamber S, so that only the freezing chamber fan FM1 is stopped and the storing chamber fans FM2, 3 and the circulation fans FM4, 5 are kept at a state where they can be driven. In turn, if the storing operation is being carried out, the temperature in the freezing chamber F has a less amount of difference in respect to that of the storing chamber S and since there occurs a possibility that it may be increased more than that of the storing chamber S during the time in which the door is being left open, the storing chamber fans FM2, 3 and the circulation fans FM4, 5 are also stopped in addition to the freezing chamber fan FM1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage having a plurality of storage compartments cooled to different temperatures, and more particularly to a drive control of a fan for circulating cool air when a door of each storage compartment is opened.

[0002]

2. Description of the Related Art FIG. 30 shows a quick freezing storage as an example of this type of cooling storage. The inside of the heat insulating box a is divided into a freezing room F on the right side and a storage room S on the left side by a partition wall b. Above the freezing room F, a cooler c and a freezing room fan d are installed,
The cool air generated by the cooler c can be circulated and supplied into the freezing chamber F by the freezing chamber fan d as shown by the solid line arrow in FIG. Then, based on the temperature detected by the freezing room temperature sensor e, the driving and stopping of the cooler c and the freezing room fan d are controlled, and the freezing room F has a freezing temperature (about −50 ° C.) or The storage temperature (about −25 ° C.) is maintained. On the other hand, a cold air passage g provided with a storage room fan f is provided in the partition wall b, and when the storage room fan f is driven, as shown by a dashed arrow in FIG.
After a part of the cold air in the freezing room F is drawn to the storage room S side,
A recirculated flow is generated on the suction side of the freezing chamber fan d.
Then, the drive and stop of the storage room fan f are controlled based on the detected temperature detected by the storage room temperature sensor h,
The inside of the storage room S is maintained at a storage temperature (about −20 ° C.).

[0003]

By the way, in the conventional quick freezing storage, when either the storage room S or the freezing room F is opened, both the freezing room fan d and the storage room fan f are stopped. It was like. This is to prevent a large amount of cool air from being released outside the refrigerator by driving the fan. However, the conventional fan control system also has the following disadvantages.

[0004] For example, if the door of the storage room S is opened while the freezing room F is being cooled, the freezing room fan d also stops, and the cooling of the freezing room F is delayed during that time. Further, since the storage room S draws part of the cool air in the freezing room F and cools, the delay in cooling the freezing room F affects the storage room S, and the storage room S after the door is closed. Is also delayed. Further, if the door of the freezing chamber F is opened while the temperature of the inside of the storage room S rises and the cooling operation is being performed, the storage room fan f also stops. It was not possible to do so, and there was a risk that the stored foods would have a bad thermal effect. The present invention has been completed based on the above circumstances, and an object of the present invention is to allow a storage room to be properly cooled even when a door is opened.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of storage rooms partitioned by partition walls are formed in a heat insulating box, and one of the storage rooms is formed. Is cooled by the cool air generated by the cooler being circulated by the cooler fan, and the other storage room is connected to the one storage space through the cool air passage with the auxiliary fan provided on the partition wall. In a cooling storage in which a part of the cold air in the room is cooled by being circulated and supplied, when the door of the other storage room is opened, only the auxiliary fan is stopped, and the one storage room is stopped. When the door is opened,
Only the cooler fan is stopped based on the inside temperature condition of the one storage room, or the fan control means for stopping both the cooler fan and the auxiliary fan is provided. Have.

According to a second aspect of the present invention, in the first aspect of the present invention, the one storage room has a first cooling temperature slightly lower than a cooling temperature of the other storage room, and further lower than the first cooling temperature. Cooling temperature detection means is provided which can be cooled to two temperatures, that is, a second cooling temperature, and detects which one of the storage chambers is cooled to the first or second cooling temperature; When the door of the one storage room is opened and the one storage room is cooled at the first cooling temperature, both the cooler fan and the auxiliary fan are stopped, and It is characterized in that only the cooler fan is stopped when the cooling is performed at the cooling temperature.

According to a third aspect of the present invention, in the first aspect of the present invention, there is provided a temperature sensor for individually detecting a temperature in each of the storage compartments, and when the door of the one storage compartment is opened, When the internal temperature of one storage room is higher than the internal temperature of the other storage room, both the cooler fan and the auxiliary fan are stopped, and the internal temperature of the one storage room is When the temperature is lower than the inside temperature of the other storage room, only the cooler fan is stopped.

According to a fourth aspect of the present invention, in the first aspect of the present invention, there is provided a temperature sensor for detecting a temperature inside the one storage room, and when the door of the one storage room is opened, the one of the two storage rooms is opened. If the temperature inside the storage room is higher than the predetermined value,
It is characterized in that both the cooler fan and the auxiliary fan are stopped, and when the value is lower than the predetermined value, only the cooler fan is stopped.

[0009]

When the door of the other storage compartment is opened, only the auxiliary fan is stopped.
Therefore, a cooler fan can be driven in one storage room, and cooling can be performed when cooling is required in one storage room. With proper cooling in one storage room,
The temperature of the other storage room is quickly restored. When the door of one storage room is opened, for example, when the internal temperature of one storage room is sufficiently low, only the cooler fan is stopped. Thus, when cooling is required in the storage room, the cooling air in one storage room is drawn to cool the other storage room. If the temperature in one storage room is high, the other storage room cannot be cooled even if the air inside the storage room is pulled, and may function to increase the temperature. Both auxiliary fans are stopped.

<Invention of claim 2> When the door of one storage room is opened, if this one storage room is set to the second cooling temperature, the inside temperature of one storage room becomes sufficient. Since it is low and can be used for cooling the other storage compartment, only the cooler fan is stopped and the auxiliary fan can be driven. Conversely, if one of the storage rooms is set to the first cooling temperature, the temperature inside the storage room of one of the storage rooms is not much different from that of the other storage room, and may rise more than the other storage room while the door is open. Therefore, both the cooler fan and the auxiliary fan are stopped.

<Invention of claim 3> When the door temperature of one storage room is lower than that of the other storage room when the door of one storage room is opened, the inside of the storage room of one storage room is opened. Since cool air is available for cooling the other storage compartment, only the cooler fan is stopped and the auxiliary fan is driven. If the inside temperature of one storage room is higher than that of the other storage room, the air inside one storage room may increase the temperature of the other storage room. Is also stopped.

<Invention of claim 4> When the door inside one storage room is opened, if the temperature inside the storage room of this one storage room is lower than a predetermined value, the cold air inside the storage room of one storage room will be cooled by the other. Since the cooling fan can be used for cooling the storage room, only the cooler fan is stopped and the auxiliary fan is driven. Conversely, if the inside temperature of one storage room is higher than a predetermined value, it is determined that the inside air cannot be used for cooling the other storage room, and both the cooler fan and the auxiliary fan are stopped. You.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a quick-frozen storage will be described below with reference to the accompanying drawings. <First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. First, the overall structure of the quick-frozen storage according to the present embodiment will be described with reference to FIGS. Reference numeral 1 denotes a heat insulating box constituting the main body of the quick-freezing storage, the inside of which is divided into two parts by heat insulating partition walls 2.
The room on the right side is a freezing room F for rapidly freezing food, and the room on the left side is a storage room S for freezing and storing rapidly frozen food. The storage room S is further divided into upper and lower two rooms S via a partition plate 6.
a and Sb.

Above the freezing compartment F, a cooler compartment 4 is formed by being partitioned by a partition plate 3, in which a cooler 5 and a freezing compartment fan FM1 are installed. The cooler 5 is circulated and connected via a refrigerant pipe to a compressor, a condenser, and the like (not shown) provided outside the machine, and forms a known refrigeration cycle. The cool air generated by the cooler 5 is blown out by the freezing chamber fan FM1, and flows down along the side wall of the freezing chamber F along the side opposite to the partition wall 2 as shown by the solid arrow in FIG. A circulating flow is generated in such a manner that it traverses toward the wall 2 and rises along the partition wall 2 and is guided to the suction side of the freezing chamber fan FM1. The freezing room F is provided with a freezing room thermistor TH5.

As shown in FIG. 2, the partition wall 2 has a cool air inlet 10 formed at a lower edge thereof and a cool air return port 11 formed at a position slightly lower than the upper edge thereof.
The cold air inlet 10 is equipped with storage room fans FM2 and FM3. A suction duct 15 and a return duct 16 are mounted on the surface of the partition wall 2 on the freezing room F side. On the side wall of the storage room S opposite to the partition wall 2, two circulation ducts 18 are provided, which are divided into a front side and a back side, and circulation fans FM4 and FM5 are provided at upper ends thereof. I have.

When the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are driven, as shown by the broken arrows in FIG. 1 and the arrows in FIG. The part is sucked from both inlets 20 of the suction duct 15 and is blown out from the cold air inlet 10 toward the side wall opposite to the partition wall 2 along the bottom of the storage room S,
After rising along this side wall and partly along the circulation duct 18, cross the ceiling side toward the partition wall 2,
After flowing down inside the return duct 16 from the cool air return port 11,
A circulating flow such as being guided from the outlet 21 at the lower end to the suction side of the freezing chamber fan FM1 is generated. The storage room S is provided with a storage room thermistor TH6.

The cooler 5 is provided with four defrost heaters H2 to H5 as shown in the figure, and a drain pan 23 for receiving defrost water is provided on the lower surface thereof. Can be discharged to
As shown in FIG. 3, an entrance 30 is opened in front of the freezing chamber F and the upper and lower storage chambers Sa and Sb.
Doors 31 to 33 are provided at each entrance 30 so as to be openable and closable. A magnet 35 is mounted on the back surface of each of the doors 31 to 33, and door switches 36 to 38 formed of a reed switch are mounted on the rim of the corresponding entrance 30.
The open / close states of 1-33 can be detected. The functions and the like of the door switches 36 to 38 will be described later.

Next, the overall operation and control such as the cooling operation and the defrosting operation of the quick freezing storage according to this embodiment are shown in FIG.
This will be described with reference to FIG. The operation during the cooling operation is as follows. On the freezing room F side, a freezing operation for maintaining a freezing temperature of about −50 ° C. for quick freezing and a storing operation for maintaining a freezing temperature of about −25 ° C. for storage are selectively executed. First, when the operation switch S1 is turned on, predetermined initial settings are performed as shown in the flowchart of FIG.

If the freezing operation is selected here (FIG. 5)
(Step S1 in the flowchart of "NO", Step S2 is "YES"), the freezing chamber front frame heater H6 is heated to a high temperature, the freezing chamber fan FM1 is turned on, and the detected temperature of the freezing chamber thermistor TH5 is-. 48
℃ or more, the solenoid valve SV and the refrigerator are turned on,
When the detected temperature falls below −52 ° C., the solenoid valve SV and then the refrigerator are repeatedly turned off, and the inside of the freezing chamber F is controlled to “−50 ° C. ± 2 ° C.”. When the preservation operation is selected ("NO" in step S2), as shown in FIG. 6, the freezing chamber front frame heater H6 is heated to a relatively low temperature, and the detected temperature of the freezing chamber thermistor TH5 is -23.
C. or more, the solenoid valve SV, the freezing chamber fan FM1 and the refrigerator are turned on, and when the detected temperature becomes -27 ° C. or less, the solenoid valve SV and subsequently the refrigerator and the freezing chamber fan FM1 are repeatedly turned off. And the freezer compartment F
℃ ± 2 ℃ ”.

On the other hand, during the cooling operation on the storage chamber S side ("NO" in step S3 of FIG. 7), as shown in the flowchart of FIG. The temperature detected by the room thermistor TH6 is -18
When the temperature is equal to or higher than ℃, only one storage room fan FM2 is turned on during the freezing operation, and both the storage room fans FM2 and FM3 are turned on during the storage operation, and when the detected temperature becomes −21 ° C. or lower, Both storage room fans FM2 and FM3
Is repeatedly turned off, and the storage room S becomes “−2”.
0 ° C. + 2 ° C. to −20 ° C.-1 ° C. ”.

The defrosting operation is as follows. When the defrosting operation is started by the defrost timer or manually (Step S1 in the flowchart of FIG. 5 is “YES”), the programs shown in the flowcharts of FIGS. 8 and 9 are executed. In the defrosting, as shown in FIG. 8, the solenoid valve SV and the freezing chamber fan FM1 are turned off, and the drain pan heater H1 is turned off.
After the defrost heaters H2 to H5 are turned on, the refrigerator is turned off. When the defrost thermometer TH4 is turned off (Step S4 is "YE
S "), all the heaters H1 to H5 are turned off, and as shown in FIG. 9, after a predetermined draining time and a pre-cooling time, the temperature of the freezing chamber F becomes equal to or lower than the temperature of the storage chamber S. (Step S5 is "YES"), the cooling operation is restarted.

During the defrosting operation in the storage room S (Step S3 in FIG. 7 is "YES"), the control shown in the flowchart of FIG. 10 is performed. First, both storage room fans FM2
When the detection temperature of the storage room thermistor TH6 becomes −8 ° C. or higher, the circulation fans FM4 and FM5 are turned off.
Is turned on, and when the detected temperature falls below -12 ° C., the turning-off of both circulation fans FM4 and FM5 is repeated. Thereby, during the defrosting operation, the inside of the storage room S is
It is controlled to “−8 ° C. to −12 ° C.”. After the defrost operation,
Under the condition that the temperature of the freezing compartment F has become equal to or lower than the temperature of the storage compartment S ("YES" in step S6), the normal cooling operation is restarted.

During the above-mentioned cooling operation, a routine for monitoring whether the freezing room F and the storage room S are in an abnormally high temperature state is executed. FIG. 11 shows the freezing room F side. When the temperature detected by the freezing room thermistor TH5 becomes −13 ° C. or more for more than 2 hours during the preservation operation in the freezing room F, the freezing room F is shown. The high temperature alarm "E1" is displayed. On the other hand, FIG.
Reference numeral 2 denotes the storage room S side. When the storage room S is in the storage operation state, the detected temperature of the storage room thermistor TH6 is −
If the temperature of 8 ° C. or more exceeds 10 hours, a storage room high temperature alarm “E2” is displayed.

Further, various monitoring routines are executed in association with the defrosting operation. FIG. 13 shows a defrosting abnormality monitoring routine. In the flowchart of FIG. 8 showing the defrosting operation, if the defrost thermostat TH4 has not been turned off even after 30 minutes have passed since the defrost heaters H1 to H5 are energized ("NO" in step S4, step S7 Is "YES"), the heaters H1 to H5 are turned off, and the defrost abnormality alarm "E3" is displayed. FIG. 14 shows a monitoring routine of the protection thermo operation. Similarly, in the flowchart of FIG. 8, before the defrost thermostat TH4 is turned off (“NO” in step S4), the protection thermostat TH1 is set.
Are turned off ("YES" in step S8), the heaters H1 to H5 are turned off, and the protection thermo-error alarm "E4" is displayed.

FIG. 15 shows a routine for monitoring the setting failure of the defrost timer. If the defrosting operation is not started even after 25 hours have elapsed since the cooling operation of the freezing chamber F was started (after the defrost cycle timer was started) ("YES" in step S9 in FIG. 5), the frost The alarm "E5" is displayed, and the defrosting operation is forcibly performed. FIG. 16 shows a refrigerator abnormality monitoring routine.
Here, during the cooling operation, if a refrigerator abnormality such as a high pressure abnormality, a discharge gas temperature abnormality or an overcurrent abnormality is recognized, the refrigerator is stopped and a refrigerator abnormality alarm “E6” is issued.

Further, a routine for monitoring whether the freezing room thermistor TH5 and the storage room thermistor TH6 are abnormal is executed. On the freezing chamber F side, the processing is as shown in the flowchart of FIG. That is, during operation, if the freezing chamber thermistor TH5 is disconnected, an abnormal alarm "H1" is issued, and if the freezing chamber thermistor TH5 is short-circuited, an abnormal alarm "H2" is issued. . Therefore, as shown in the graph of FIG. 19, the temperature in the freezing chamber F drops to about −50 ° C. in both the freezing operation and the preservation operation after a thermistor abnormality occurs.

On the storage room S side, the process is as shown in the flowchart of FIG. During operation, the storage room thermistor TH
When the wire 6 is disconnected, an abnormal alarm "H3" is issued, and when the storage room thermistor TH6 is short-circuited, an abnormal alarm "H4" is issued. During the cooling operation, the freezing chamber F is continuously cooled. When the freezing room F is in the freezing operation, the temperature in the storage room S decreases until the temperature becomes lower than −40 ° C. after the thermistor abnormality occurs, as shown in the graph of FIG. In the middle case, as shown in FIG. 3B, the temperature drops to about -25 ° C. after a thermistor abnormality occurs.

The doors 31 to 3 of the freezing room F and the storage room S are provided.
A routine for monitoring for forgetting to close 3 is executed. On the freezing chamber F side, the processing is as shown in the flowchart of FIG. If the door 31 of the freezing chamber F is left open for 30 minutes or more, an alarm "E7" for forgetting to close is issued. On the other hand, on the storage room S side, the processing is as shown in the flowchart of FIG. If the door 32 or 33 of the storage room S is left open for 30 minutes or more, an alarm "E8" for forgetting to close is issued.

In this embodiment, each of the fans FM1-F when the doors 31-33 of the freezing compartment F and the storage compartment S are opened.
It has a feature in the drive control of M5, which will be described in detail below. In this embodiment, a fan control means 40 is provided as shown in FIG. 23, and a program described later is executed. The fan control means 40 is provided with a timer 41, and a door switch 36 is provided on the input side.
38, and on the output side, a freezing room fan FM1, a storage room fan FM2, FM3, and circulation fans FM4, FM5.
Is connected.

The operation of the present embodiment will be described with reference to the flowcharts of FIGS. Any door 31-
When 33 is released, the count of the timer 41 is started in step S21 of the flowchart of FIG. 24, and it is determined in step S22 whether the operation is the freezing operation or the preservation operation. If the storage operation is being performed (step S22 is “NO”), the process proceeds to step S23, and the door actually opened is the door 3 of the freezing chamber F.
If it is 1 (“YES” in step S23), in step S24, the freezing room fan FM1 and the storage room fan F
All of the fans M2 and FM3 and the circulation fans FM4 and FM5 are stopped. This is because, during the preservation operation, when the temperature of the freezing room F is close to the temperature of the preserving room S and the door 31 of the freezing room F is opened, the temperature in the freezing room F rises and the temperature of the preserving room S increases. Since the temperature may be higher than the temperature, the storage room fan FM1 may be added to the storage room fan FM1 in order to prevent warm air from flowing into the storage room S and causing the temperature of the storage room S to rise.
2, FM3 and circulation fans FM4, FM5. The opened door is the door 32 or 3 of the storage room S.
If 3 (“NO” in step S23), only the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are stopped. This prevents the cold air in the storage room S from flowing out of the refrigerator, while the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 stop, so that the freezing room F becomes independent from the storage room S. Therefore, the operation of the freezing chamber fan FM1 is continued and the cooling of the freezing chamber F is continued.

If the doors 31 to 33 are closed (step S
26 is "YES"), in step S27, all the fans FM1 to FM5 return to the states before the doors are opened, and the timer 41 is also reset. If a signal for closing the door is not obtained even after 3 minutes have passed since the doors 31 to 33 were opened ("YES" in step S28), the door switch 3
There is a possibility of failure of 6 to 38, and in order to prevent the temperature of each of the chambers F and S from rising, the return operation in step S27 is forcibly executed. According to the above control, even when the door 32 or 33 of the storage room S is opened during the storage operation, the cooling of the freezing room F is continued, so that the cooling time of the freezing room F is lost. When the door 32 or 33 of the storage room S is closed again, the temperature recovery time can be shortened, and damage to the storage ingredients and the like can be minimized.

On the other hand, during the freezing operation (step S22 is "Y
ES ”), the process proceeds to step S29 of the flowchart in FIG. And the opened door is the door 3 of the freezing room F.
If 1 (“YES” in step S29), only the freezing room fan FM1 is stopped in step S30.
This is because during the freezing operation, the temperature of the freezing chamber F is set to the storage chamber S.
Is much lower than the temperature of the storage room fan FM.
2, FM3 and the circulation fans FM4, FM5 continue to operate. If the opened door is the door 32 or 33 of the storage room S (Step S29 is “NO”), Step S31
Storage room fans FM2 and FM3 and circulation fan FM
4, only FM5 is stopped. This prevents the cold air in the storage room S from flowing out of the storage, while the storage room fan F
When the M2 and FM3 and the circulation fans FM4 and FM5 are operated, there is a possibility that warm air may flow into the freezing chamber F in the opposite direction, which hinders the cooling of the freezing chamber F.
2, FM3 and the circulation fans FM4, FM5.

Similarly, if the doors 31 to 33 are closed ("YES" in step S32), in step S33, all the fans FM1 to FM5 return to the state before the doors are opened, and the timer 41 is reset. In addition, doors 31-
If a signal for closing the door has not been obtained even after three minutes have passed since the opening of the door 33 ("YES" in step S34), the return operation in step S33 is forcibly executed. According to the above control, the door 3 of the storage room S during the freezing operation
Since the cooling of the freezing room F is continued even when the storage compartments 2 and 33 are opened, the loss of the cooling time in the freezing room F is eliminated, and the time required for the temperature of the storage room S to return to the temperature is also reduced. Can be shortened. When the door 31 of the freezing room F is opened, the storage room fans FM2, FM3 and the circulation fan FM4,
Since the operation with the FM5 is performed, the temperature control of the storage room S is performed smoothly.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the operation and stop of each of the fans FM1 to FM5 are controlled by adding comparison information of the temperatures of the freezing room F and the storage room S. Therefore, the freezing room thermistor TH5 and the storage room thermistor TH6 are connected to the input side of the fan control means 40A of the second embodiment.

The operation of the second embodiment will be described with reference to the flowchart of FIG. When any of the doors 31 to 33 is opened, the opened door is determined in step S41, and if the door 31 is the door 31 of the freezing chamber F ("YES"),
In step S42, the freezing room fan FM1 is stopped. Subsequently, in step S43, the freezing room thermistor TH
5 is compared with the detected temperature of the storage room thermistor TH6. If the temperature of the freezing room F is higher than the temperature of the storage room S (“N
O "), the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are also stopped. Conversely, if the temperature of the freezing room F is lower than the temperature of the storage room S (" YES "), the storage room fans FM2 and FM3 And the circulation fans FM4 and FM5 are not stopped.

This is because if the temperature of the freezing chamber F is lower than the temperature of the storage chamber S when the door 31 of the freezing chamber F is opened,
Storage room fans FM2 and FM3 and circulation fans FM4 and FM
5 is intended to actively use the cold air in the freezing room F to efficiently cool the storage room S. On the contrary, the temperature of the freezing room F is higher than the temperature of the storage room S. If high, storage room fans FM2 and FM3 and circulation fan FM
4 and FM5, the storage chamber S is prevented from unnecessarily raising the temperature. If the door 31 is closed (Step S45 is “YES”), Step S4
At 6, all the fans FM1 to FM5 return to the state before the door was opened.

The opened door is the door 32 or 3 of the storage room S.
If it is 3 (“NO” in step S41), step S
At 47, only the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are stopped. This prevents the cold air in the storage room S from flowing out of the refrigerator, while the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 stop, so that the freezing room F becomes independent from the storage room S. Because
This is because the operation of the freezing room fan FM1 is continued and the cooling of the freezing room F is continued. Similarly, if the doors 32 and 33 are closed ("YES" in step S48), in step S46, all the fans FM1 to FM5 return to the states before the doors were opened.

In the second embodiment, the door 3 on the freezing chamber F side
When 1 is opened, if the temperature of the freezing room F is lower than the temperature of the storage room S, the cool air of the freezing room F can flow into the storage room S side. It can be performed stably, and accordingly, adverse thermal effects in the storage room S can be avoided.
Also, when the doors 32 and 33 of the storage room S are opened,
Since the cooling in the freezing room F is continued, the loss of the cooling time in the freezing room F is eliminated, and the storage room S
Temperature recovery time can also be shortened.

<Third Embodiment> FIGS. 28 and 29 show a third embodiment of the present invention. In the third embodiment, the operation and stop of each of the fans FM1 to FM5 is controlled by adding information on the temperature of the freezing chamber F. Therefore, the freezing room thermistor TH5 is connected to the input side of the fan control means 40B of the third embodiment.

The operation of the third embodiment will be described with reference to the flowchart of FIG. When any one of the doors 31 to 33 is opened, it is determined in step S51 whether the operation is a freezing operation or a storage operation. During the storage operation (Step S51 is “N
If "O"), the process proceeds to step S52, and if the opened door is the door 31 of the freezing room F (step S52 is "YE").
S "), in step S53, the freezing room fan FM1
And the storage room fans FM2 and FM3 and the circulation fan FM
4, all the fans of FM5 are stopped. This is because, during the preservation operation, when the temperature of the freezing room F is close to the temperature of the preserving room S and the door 31 of the freezing room F is opened, the temperature in the freezing room F rises and the temperature of the preserving room S increases. In addition to the freezing room fan FM1, in order to prevent warm air from flowing into the storage room S and inviting a rise in the temperature of the storage room S, since the temperature may be higher than the temperature,
Storage room fans FM2, FM3 and circulation fans FM4, F
M5 is also stopped. If the door 31 is closed ("YES" in step S54), in step S55, all the fans FM1 to FM5 return to the state before the door was opened.

The opened door is the door 32 or 3 of the storage room S.
If 3 (“NO” in step S52), step S
At 56, only the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are stopped. This prevents the cold air in the storage room S from flowing out of the refrigerator, while the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 stop, so that the freezing room F becomes independent from the storage room S. Because
This is because the operation of the freezing room fan FM1 is continued and the cooling of the freezing room F is continued. If the doors 32 and 33 are closed ("YES" in step S57), in step S55, all the fans FM1 to FM5 return to the state before the doors were opened.

On the other hand, during the freezing operation (step S51 is "Y
ES ”), the process proceeds to step S58, and if the opened door is the door 32 or 33 of the storage room S (step S58).
58 is "NO"), in step S56, only the storage room fans FM2 and FM3 and the circulation fans FM4 and FM5 are stopped. Similarly to the above, while preventing the cold air in the storage room S from flowing out of the refrigerator, the operation of the freezing room fan FM1 is continued and the cooling of the freezing room F is continued. Door 32,
If 33 is closed ("YES" in step S57),
Similarly, in step S55, all fans FM1 to FM
5 returns to the state before the door was opened.

If the opened door is the door 31 of the freezing room F (step S58 is "YES"), the process proceeds to step S59, and the temperature of the freezing room F detected by the freezing room thermistor TH5 is "-30 ° C". It is determined whether it is lower. If the temperature of the freezing room F is lower than −30 ° C. (“YES” in step S59), in step S60, the freezing room fan F
Only M1 is stopped. This is not because the temperature inside the freezing chamber F rises immediately when the door 31 of the freezing chamber F is opened, but it takes some time for the outside air and the inside air to be exchanged. If the temperature is lower than −30 ° C., the storage room fans FM2 and FM3 and the circulation fan F
This is because M4 and FM5 are operated to cool the storage room S using the cool air in the freezing room F.

On the other hand, if the temperature of the freezing chamber F is higher than -30.degree. C. ("NO" in step S59), step S61 is executed.
, The freezing room fan FM1 and the storage room fan FM2
All the fans of the FM3 and the circulation fans FM4 and FM5 are stopped. This is because if the temperature of the freezing room F is higher than −30 ° C. at the time when the door 31 of the freezing room F is opened, there is not much difference from the temperature of the storage room S, and the temperature of the freezing room F is relatively short. There is a possibility that the temperature will rise and become higher than the temperature of the storage room S, and all the fans FM1 to FM5 are stopped so that the temperature of the storage room S does not rise due to the warm air from the freezing room F. In any case, if the door 31 is closed (Step S62 is “YE
S "), in step S55, all the fans FM1 to FM
M5 returns to the state before the door was opened.

As described above, in the third embodiment, even when the doors 32 and 33 of the storage room S are opened during the storage operation and the freeze operation, the cooling of the freezing room F is continued. In addition, the loss of the cooling time on the freezing chamber F side is eliminated, and the time required for the storage chamber S to return to the temperature can be shortened accordingly.
Further, during the freezing operation, when the door 31 of the freezing chamber F is opened and the temperature of the freezing chamber F is lower than −30 ° C., the storage chamber fans FM2, FM3 and the circulation fan FM4.
Since the operation of the FM 5 is continued, the temperature control of the storage room S can be performed smoothly. Note that the present invention is not limited to the embodiment described with reference to the above description and drawings, and can be implemented with various modifications without departing from the scope of the invention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a quick-frozen storage according to an embodiment of the present invention, as viewed from the front.

FIG. 2 is a partially cutaway perspective view thereof.

FIG. 3 is a front view showing a state where a door is opened.

FIG. 4 is a flowchart of an initial setting of a cooling operation.

FIG. 5 is a flowchart of the temperature control on the freezing chamber side during the freezing operation.

FIG. 6 is a flowchart of temperature control on the freezing chamber side during the storage operation.

FIG. 7 is a flowchart of temperature control on the storage room side.

FIG. 8 is a flowchart for a defrosting operation.

FIG. 9 is a flowchart from the draining operation to the restart of the cooling operation.

FIG. 10 is a flowchart of fan control on the storage room side during the defrosting operation.

FIG. 11 is a flowchart relating to a high temperature warning of a freezing room.

FIG. 12 is a flowchart relating to a high-temperature alarm in a storage room.

FIG. 13 is a flowchart relating to a defrosting abnormality.

FIG. 14 is a flowchart according to a protection thermo operation.

FIG. 15 is a flowchart relating to a defrosting timer setting failure.

FIG. 16 is a flowchart for a refrigerator abnormality;

FIG. 17 is a flowchart relating to a freezing chamber thermistor abnormality;

FIG. 18 is a flowchart relating to a storage room thermistor abnormality.

FIG. 19 is a graph showing the temperature transition of the freezing chamber when the freezing chamber thermistor is abnormal.

FIG. 20 is a graph showing a temperature change of the storage room when the storage room thermistor is abnormal;

FIG. 21 is a flowchart relating to forgetting to close a door of a freezing chamber.

FIG. 22 is a flowchart for forgetting to close a storage room door.

FIG. 23 is a block diagram of a configuration of a fan control unit according to the first embodiment.

FIG. 24 is a flowchart showing fan control during a preservation operation.

FIG. 25 is a flowchart showing fan control during freezing operation.

FIG. 26 is a block diagram of a configuration of a fan control unit according to a second embodiment.

FIG. 27 is a flowchart showing fan control.

FIG. 28 is a block diagram of a configuration of a fan control unit according to a third embodiment.

FIG. 29 is a flowchart showing fan control.

FIG. 30 is a sectional view of a conventional quick-freezing storage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Insulated box 2 ... Partition wall 5 ... Cooler FM1 ... Freezing room fan (cooler fan) 15 ... Suction duct 1
6 Return duct 31-33 Door 36-38 Door switch 40 Fan control means 40A Fan control means 40B Fan control means F Freezing room S Storage room FM1 Freezing room fan (cooler fan) FM2 FM3: Storage room fan (auxiliary fan) FM
4, FM5: circulation fan TH5: freezing room thermistor TH6: storage room thermistor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25D 17/06 313 F25D 17/06 316

Claims (4)

(57) [Claims] 1. A plurality of storage rooms partitioned by partition walls are formed in a heat insulating box, and one of the storage rooms is cooled by circulating cool air generated by a cooler by a cooler fan. The other storage room is a cooling storage that is cooled by a part of the cool air of the one storage room being circulated and supplied through a cool air passage with an auxiliary fan provided on the partition wall. When the door of the other storage room is opened, only the auxiliary fan is stopped, and when the door of the one storage room is opened, based on the internal temperature condition of the one storage room. A cooling storage unit provided with fan control means for stopping only the cooler fan or stopping both the cooler fan and the auxiliary fan. 2. The one storage room can be cooled to two temperatures, a first cooling temperature slightly lower than the cooling temperature of the other storage room, and a second cooling temperature lower than the first cooling temperature. Cooling temperature detecting means for detecting whether the one storage room is cooled to the first or second cooling temperature, and when the door of the one storage room is opened When the one storage room is cooled at the first cooling temperature, both the cooler fan and the auxiliary fan are stopped, and when the storage room is cooled at the second cooling temperature, The cooling storage according to claim 1, wherein only the cooler fan is stopped. 3. A temperature sensor for individually detecting a temperature inside the storage room, wherein when a door of the one storage room is opened, the temperature inside the one storage room is reduced by the temperature of the other storage room. When the temperature is higher than the internal temperature of the storage room, both the cooler fan and the auxiliary fan are stopped, and when the internal temperature of the one storage room is lower than the internal temperature of the other storage room. 2. A cooling storage according to claim 1, wherein only the cooler fan is stopped. 4. A temperature sensor for detecting an inside temperature of the one storage room, wherein when a door of the one storage room is opened, the inside temperature of the one storage room becomes lower than a predetermined value. The system according to claim 1, wherein when the temperature is higher, both the cooler fan and the auxiliary fan are stopped, and when the temperature is lower than the predetermined value, only the cooler fan is stopped. Cold storage.