JPH06213548A - Refrigerator - Google Patents

Abstract

(57) [Summary] [Purpose] Minimize the energization time of the auxiliary winding of the compressor motor at start-up, and reduce the generation of noise at start-up. [Structure] The microcomputer 6 closes the switches 3 and 2 to start the compressor motor 1, turns off the switch 3 after a preset time, and detects a motor current value by a start detector 4. At this time, if the motor current value is large, it means that the starting was not performed properly, and the switch 3,
2 is closed, the compressor motor 1 is started, a time longer than the set time is set, and the switch 3 is turned off. In this way, the motor current is detected by the start detector 4 while sequentially changing the set time, and when a current value that is sufficiently smaller than the current value at the start of the start is detected, good start is performed at this time. Therefore, the set time at this time is set as the minimum starting time, and thereafter the engine is started at this minimum starting time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator provided with a compressor for a cooler, and more particularly to a method of starting the compressor for a cooler and temperature control of the refrigerator.

[0002]

2. Description of the Related Art In a conventional refrigerator having a compressor for a cooler, as described in Japanese Utility Model Publication No. 61-35753, a starting device using a positive temperature coefficient thermistor is provided for starting a refrigerator. Therefore, the starting time is a fixed time determined by the resistance value and volume of the positive temperature coefficient thermistor, and in consideration of the fluctuation of the outside air temperature and the variation of the compressor for the cooler, the starting failure of the compressor for the cooler due to these is considered. It was set to a time that could be prevented. Further, the temperature control in the refrigerating compartment is also performed so that the temperature inside the refrigerating compartment becomes constant.

[0003]

Therefore, according to the conventional starter for a compressor for a cooler described above, the time required for starting is extremely long. In addition to the main winding, the compressor motor for a cooler is provided with an auxiliary winding that is energized only at the time of starting.From the above, at the time of starting, a current flows through the auxiliary winding for a long time. This causes a large amount of noise. That is, the conventional refrigerator has a problem that noise at the time of starting is large.

Further, since the temperature in the refrigerator is controlled to be constant, when a large amount of load (stored material such as food) is put in, the temperature in the refrigerator rises, and the damper.
Etc., and the cooling fan sends cold air to the inside to lower the temperature inside the chamber, but due to a large amount of load, the temperature inside the chamber is lowered before the temperature of the load drops to the temperature required for storage. Falls to the set temperature, and the inside temperature sensor detects this and closes the damper etc., and the supply of cold air is stopped. Therefore, the temperature of the load will not fall to the temperature required for storage.

An object of the present invention is to provide a refrigerator which solves such a problem, can be started in a minimum required time, and can reduce noise at the time of starting.

Another object of the present invention is to provide a refrigerator in which the load temperature can be set to a predetermined value irrespective of the load amount put in the refrigerator.

[0007]

In order to achieve the above object, the present invention learns the starting time of a compressor for a cooler by using a detection output of the detector for detecting a starting failure of the compressor for a cooler. However, the control means for setting the minimum start time is provided, and the compressor for the cooler is started at the minimum start time set by the control means.

Further, the present invention is provided with means for estimating the heat load amount in the refrigerating compartment and setting the set temperature in the refrigerating compartment to a temperature corresponding to the estimated heat load amount.

[0009]

[Function] By changing the starting time of the compressor for the cooler variously,
Each time, the detector performs learning to determine whether or not the starting is defective, and the shortest starting time that does not cause the defective starting is searched for. Then, the shortest time found is set as the minimum starting time, and the compressor for the cooler is started at this minimum starting time. Further, the minimum starting time is searched for each outside air temperature, and the engine is started with the minimum starting time according to the outside air temperature during use. As described above, the time during which the current flows through the auxiliary winding of the cooler compressor is always the minimum required, and the cooler compressor is started without starting failure, and the noise at the start can be reduced.

Further, the amount of load introduced into the refrigerating compartment can be estimated by the temperature of the refrigerating compartment, the outside air temperature, the opening / closing frequency of the refrigerating compartment door and the like. Since the refrigerating room temperature is set according to the load amount estimated in this way, the load temperature can be set to a temperature required for storage.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a circuit diagram and a block diagram showing an embodiment of a refrigerator according to the present invention. FIG. 1A shows a drive circuit of a compressor motor for a cooler, and FIG. 1B shows a control system thereof. 1 is a compressor motor for a cooler (hereinafter, simply referred to as a motor unless otherwise specified), 1a is a main winding, 1b is an auxiliary winding, 2 is a switch for connecting and disconnecting the compressor for the cooler, 3 Is a start switch, 4 is a detector, 5 is a commercial power source, 6 is a microcomputer, 7 is a start switch drive circuit, and 8 is an intermittent switch drive circuit.

In FIG. 1A, a motor 1 is a main winding 1
a and an auxiliary winding 1b. The auxiliary winding 1b is energized only when the motor 1 is started, and for this purpose, the starting switch 3 is provided in series with the auxiliary winding 1b. Further, the motor 1 is connected to a commercial power supply 5 via a switch 2 for connecting and disconnecting the compressor for the cooler. The detector 4 is for detecting whether the starting of the motor 1 is good or bad by the current flowing to the motor 1. The current at the time of starting the motor 1 changes as shown in FIG. That is, a large current flows through the motor 1 at the start of starting, but in the case of normal starting, the current value decreases with the passage of time as shown by the solid line. For example, after about 4 seconds, about 10% immediately after starting. It decreases and stabilizes. However, in the case of a start failure, the current value does not decrease immediately after the start and a large current continues to flow as it is, as indicated by the broken line. Therefore, this makes it possible to determine whether the starting of the motor 1 is good or bad.

In FIG. 1 (b), a starting switch driving circuit 7 drives a starting switch 3 and an intermittent switching drive circuit 8 drives a compressor compressor intermittent switch 2 on and off, respectively. The microcomputer 6 is controlled according to the detection outputs of the detector 4 and the outside air temperature detector 9.
The compressor on / off switch 2 for the cooler is controlled to be turned on and off in order to maintain a constant temperature in the freezer compartment of the refrigerator when the refrigerator is in use and operation. If the temperature becomes lower than the set temperature, the motor 1 is turned off to stop the motor 1, and if the temperature becomes too high, the motor 1 is turned on to rotate the motor 1.

Next, the operation of this embodiment will be described with reference to FIG. First, at the time of starting the compressor for the cooler, the microcomputer 6 controls the starting switch drive circuit 7 and the intermittent switch drive circuit 8 so that the starting switch 3 and the intermittent switch 2 are connected. Turn on (Steps 300, 3
01), a current flows through the main winding 1a and the auxiliary winding 1b of the motor 1 to start the motor 1 rapidly. Then, the microcomputer 6 measures the time, and when a predetermined start time N seconds (for example, 4 seconds) has elapsed from the start of the start, it controls the start switch drive circuit 7 to start the start switch 3.
Is turned off (step 302), and at the same time, the detection output of the start detector 4 is taken in, and the quality of the start is judged from the current state shown in FIG. 2 (step 303).

If the starting condition is good, this N
The second is determined as the minimum starting time, and the microcomputer 6
Holds this N seconds as it is (step 306),
If the starting condition is not good, the microcomputer 6 controls the disconnecting switch driving circuit 8 to turn off the disconnecting switch 2 (step 304), and the preset minimum starting time N is set. For example, 0.1 second is added to the second to make a new minimum starting time N seconds (step 305), and the control operation from step 300 is performed again.

When a normal starting operation is performed by repeating the above control operation, N seconds, which is the minimum starting time at that time, is determined as the minimum time, and this is held as it is.

Although the learning is carried out in this way to determine the minimum starting time, this learning may be carried out independently of the use of the refrigerator, or may be carried out each time the refrigerator is used, In this case, following step 306, the refrigerator is put into use and operation.

Although the outside air temperature is not taken into consideration above, the minimum starting time can be set according to the outside air temperature. That is, in the microcomputer 6, a time considered as the minimum starting time is preset for each outside air temperature,
When the minimum starting time is determined by the learning operation shown in FIG. 3, the microcomputer 6 pairs the determined minimum starting time with the outside air temperature information detected by the outside air temperature detector 9 at this time. Hold. This is performed for each outside air temperature, and when the motor 1 is subsequently started, the microcomputer 6 detects the outside air temperature at this time from the outside air temperature detector 9 and starts the motor 1 with the minimum starting time for this outside air temperature. To operate. In this way, the motor 1 can be operated with the optimum minimum starting time for each outside air temperature.
Can be started.

When the minimum starting time is set for each outside air temperature, the outside air temperature is divided into, for example, 5 ° C.,
The minimum starting time is set for each of the sections, and the starting is performed using the minimum starting time corresponding to the section in which the detected outside air temperature enters.

The learning of the minimum starting time for each outside air temperature may be performed independently of the use of the refrigerator or may be performed each time the refrigerator is used.

Further, in the control operation shown in FIG. 3, the correction is made only in the direction in which the minimum starting time becomes longer, but in FIG. 3, further, it is said that the normal starting is performed in step 303. When it is determined, 0.1 second is subtracted from the minimum starting time N seconds at this time to obtain a new minimum starting time. With this, the control operation from step 300 is restarted, and similarly the starting is not normal. The control operation may be repeated up to this time, and when the starting is not normally performed, the immediately preceding minimum starting time may be determined as the minimum starting time at the outside air temperature at that time. According to this, the preset minimum starting time can be roughly set, or even if the preset minimum starting time is made equal to all the outside air temperatures, an even better minimum starting time can be obtained.

As described above, in this embodiment, it is possible to easily determine the optimum minimum starting time with respect to variations in the outside air temperature and compressors for individual coolers, and to effectively reduce the noise during starting. You can

FIG. 4 is a circuit diagram and a block diagram showing another embodiment of the refrigerator according to the present invention. FIG. 4 (a) shows the drive circuit of the electric damper, and FIG. 4 (b) shows its control system. In the figure, 10 is an electric damper, 10a is a damper motor, 10b is a damper opening / closing switch, 11 is an electric damper opening / closing switch, 12 is a refrigerating compartment temperature detector, 13 is a refrigerating compartment door opening / closing detector, and 14 is electric. A damper drive circuit, 15 is a freezer compartment temperature detector, and 16 is a compressor cooling fan drive circuit, and the parts corresponding to those in FIG.

In FIG. 4, an electric damper 10 includes a damper motor 10a and a damper which is opened and closed by this rotation.
The damper motor 10a is connected to the commercial power source 5 through the switch 11 for the electric damper. The electric damper switch 11 is driven by an electric damper drive circuit 14 and is closed in response to a control signal from the microcomputer 6 to open when the damper motor 10a rotates by a predetermined amount. In this way, the damper-open / close switch 10b is alternately opened and closed every time the damper motor 10a rotates by a predetermined amount.

As shown in FIG. 5, the electric damper 10 is arranged in a cold air passage 19 connecting the freezing compartment 17 and the refrigerating compartment 18 of the refrigerator, and as described above, the damper opening / closing switch. When 10b is opened, the damper 20 is opened to open the passage 19, and when the damper opening / closing switch 10b is closed by the next rotation of the damper motor 10a, the damper 20 is closed and the passage 19 is closed.

The compressor 22 and the cooling fan 21 are connected to the microcomputer 6 by the compressor cooling fan drive circuit 16.
The drive is controlled in accordance with the control signal from. When the compressor 22 operates, the cooling fan 21 also operates and the compressor 2
The cold air obtained in 2 is supplied to the freezer 17 by the cooling fan 21.
Sent to. Further, when the damper 20 is open, this cold air is also sent to the refrigerating chamber 18 through the passage 19.

Returning to FIG. 4, the microcomputer 6
Are the indoor temperature of the refrigerating room 18 (FIG. 5) by the freezing room temperature detector 15, the indoor temperature of the freezing room 17 (FIG. 5) by the refrigerating room temperature detector 12, and the outside air temperature by the outside air temperature detector 9. The refrigerator compartment door opening / closing detector 13 detects the opening / closing time of the refrigerator compartment door and its opening / closing frequency,
Further, the opening / closing state of the damper (FIG. 5) is detected by the electric damper opening / closing detector 10c which detects the opening / closing state of the damper opening / closing switch 10b. Then, according to the detection output, the microcomputer 6 controls the electric damper drive circuit 14 and the compressor cooling fan drive circuit 16 as follows.

A set temperature is provided in the freezer compartment 17 (FIG. 5), and the microcomputer 6 constantly detects the room temperature by the detection output of the freezer compartment temperature detector 15, and the room temperature is higher than the set temperature. When the temperature rises, the compressor cooling fan drive circuit 16 is operated to operate the compressor 22 and the cooling fan 21 (FIG. 5). Thereby, the cool air from the compressor 22 is supplied to the freezer 17 by the cooling fan 21.
Sent to. As a result, the indoor temperature of the freezer compartment 17 decreases, and when the temperature falls below the set temperature, the microcomputer 6 controls the compressor cooling fan drive circuit 16 and
The compressor 22 and the cooling fan 21 are stopped.

The refrigerating compartment 18 (FIG. 5) is also provided with a set temperature, and the microcomputer 6 constantly detects the room temperature by the detection output of the refrigerating compartment temperature detector 12, and the room temperature is higher than the set temperature. When it becomes higher, the electric damper drive circuit 14 is operated to open the damper 20. As a result, the cool air from the compressor 22 is sent to the refrigerating chamber 18 via the passage 19 by the cooling fan 21. As a result, the indoor temperature of the refrigerating room 18 decreases, and when the temperature falls below the set temperature, the electric damper drive circuit 14
Is controlled to close the damper 20, and the electric damper open / close detector 10c detects this to confirm the end of the operation.

In such a structure, in this embodiment, when the compressor 22 and the cooling fan 21 are stopped, the doors are opened so that the temperature of the stored items such as foods put into the refrigerating chamber can quickly reach the set temperature. . In this case, it is necessary to detect whether food or the like has been added. Usually compressor 2
2 When food or the like is put in when the cooling fan 21 is stopped, the room temperature of the refrigerator rises. Therefore, it may be possible to judge that the food or the like has been put in due to this temperature rise. The temperature of the room rises just by opening and closing the door, and in this case, the tendency of the temperature rise changes depending on the outside air temperature. Therefore, it is not possible to determine whether or not food or the like has been added only by increasing the room temperature.

Therefore, in this embodiment, as shown in FIG. 6, the temperature inside the refrigerating room is increased 600, the opening time of the door of the refrigerating room, the opening / closing frequency 601, and the outside air temperature 602 are introduced into the refrigerating room. Estimate the load (amount of food etc.) (60
3) Then, the set temperature of the refrigerating compartment is changed according to the load amount (604). As described above, the rise in the indoor temperature of the refrigerating room rises according to the amount of load put into the refrigerating room, but it also depends on the opening time of the refrigerating room, the opening / closing frequency, and the outside air temperature. Since the temperature rises, it is intended to estimate the amount of load put into the freezer compartment by subtracting the temperature increase due to the open time of the refrigerator compartment door, the opening / closing frequency and the outside air temperature from the rise in the indoor temperature of the refrigerator compartment. . Hereinafter, a specific example of such an estimation method will be described.

Now, assuming that the sum of the opening times of the doors of the refrigerating room (the total number of times of opening and the opening time is integrated) is the integrated opening time, the indoor temperature of the room while the compressor and the cooling fan are stopped is shown. The increase change is as shown in FIG. 7, and the higher the outside air temperature, the greater the temperature increase. Further, the change in increase in the room temperature with respect to the load amount input to the refrigerating room is as shown in FIG. 8, and the higher the load temperature, the larger the temperature increase. Therefore, according to FIG. 7 and FIG. 8, when the door open accumulated time is short and the room temperature rises, it is determined that the load is applied to the refrigerating room, and the room temperature rises when the door is opened and closed and the load is applied. If there is, the temperature rise obtained by subtracting the temperature rise due to the opening and closing of the door from this room temperature rise is determined to be the rise due to the load being applied. If the input load is large, lower the set temperature of the refrigerator compartment,
If the applied load is small, do not change the set temperature.

An example of such an indoor set temperature shift method is shown in FIG.
Shown in. In the figure, the indoor temperature of the refrigerator compartment is usually T
When it becomes 1, as shown in FIG. 5, the damper 20 is opened to cool the refrigerating compartment 18, and when the room temperature drops to T2, the damper 20 is closed. By repeating this, the interior of the refrigerating compartment 18 becomes T2. Assuming that the set temperature is set so as to be maintained at a temperature in the range from to T1, when a large amount of load is input while the compressor 22 and the cooling fan 21 are stopped, as shown in the figure, Room temperature is temperature T
Rise above 1. Therefore, the damper 20 is opened, and a new set temperature of the refrigerating compartment is determined according to the input load amount so that the room temperature of the refrigerating compartment 18 drops to T3 which is lower than T2. As a result, the applied load is quickly cooled and then returned to the original set temperature to keep the room temperature within the range of T2 to T1.

In this way, in this embodiment, the temperature of the load can be immediately lowered to the preset temperature of the refrigerating compartment required for storage when the load is turned on.

FIG. 10 is a circuit diagram showing a specific example of the refrigerator compartment door open / close detector 13 in FIG. 5B, in which 23 is a door switch, 24 is an interior light, 25 is a photocoupler, and 6 is It is the microcomputer in FIG.

In FIG. 1, the door switch 23 is shown in FIG.
As shown in FIG. 1, it is attached to the side surface of the refrigerating compartment 18 and is in an on state when the door 26 of the refrigerating compartment 18 is open, and is in an off state when the door 26 is closed. Then, when the door switch 23 is turned on, the interior lamp 24 in the refrigerating compartment 18 is turned on, and together with this, the photocoupler 2
A high level door opening / closing signal is supplied to the microcomputer 6 via 5. When the door 26 is closed and the door switch 23 is off, the interior lamp 2 in the refrigerating compartment 18 is
4 is turned off, and at the same time, a low level door opening / closing signal is supplied to the microcomputer 6 via the photocoupler 25. Therefore, it is possible to detect the opening / closing frequency of the door 26 by multiplying the number of times the high-level door opening / closing signal is supplied, and by measuring the high-level period of the door opening / closing signal,
The opening time of the door 26 can be detected.

FIG. 12 is a flow chart showing the operation of another embodiment of the refrigerator according to the present invention. In this embodiment, even if the number of times the refrigerator compartment door is opened and closed is large, the temperature of the load of food or the like is not increased. By learning the opening / closing pattern of the refrigerator compartment door, the door is opened in advance. This makes it possible to predict a time when the number of times of opening and closing is large, and the set temperature is lowered at this time.

In FIG. 12, for example, the number of times the refrigerator compartment door is opened / closed per hour is counted by the door opening / closing signal in the specific example shown in FIG. 10 (step 1201), and the number of times the door is opened / closed is obtained. Is determined to be equal to or greater than a preset number of times (step 1202). Then, the date and time of the number of times of opening and closing that is equal to or more than the set number of times is stored in the memory (step 1203), this is repeated for a predetermined number of days (for example, 5 days), and the same time zone for these 5 days is detected (step 1204). In this way, the time zone in which the number of times the door is opened and closed is large is detected.

The time zone detected by such learning is
For example, if the time is from 6 pm to 7 pm, the door of the refrigerating room is frequently opened and closed during this time period, so the set temperature of the refrigerating room is changed downward from 5 pm, for example, one hour before this time period ( In step 1205), the temperature of the stored food or the like is lowered to prevent the temperature of the food or the like from rising even if the door is frequently opened and closed during the time period of 6 to 7 pm. When such a time period has passed, the set temperature of the refrigerating room is restored.

FIG. 13 shows an increase in the indoor temperature of the refrigerating room with respect to the number of times of opening and closing the door per unit time. The more the number of times of opening and closing the door, the greater the temperature shift amount, and the higher the outside air temperature. The amount of temperature shift increases even if the door is opened and closed the same number of times.

[0041]

As described above, according to the present invention, the time of the current flowing through the auxiliary winding of the compressor motor for a cooler can be set to the minimum time for stable starting, and the noise during starting is reduced. Moreover, since the starting detector constantly detects the motor current, it is possible to detect the large current even when the load of the compressor for the cooler is heavy, and to stop the compressor for the cooler. This can also protect the compressor for the cooler.

Further, according to the present invention, the load stored in the refrigerating compartment can be quickly cooled to the set temperature by estimating the load amount stored in the refrigerating compartment and changing the set temperature.

Further, according to the present invention, since the door opening / closing pattern of the refrigerating compartment is learned and the set temperature of the refrigerating compartment is changed based on the learning result, the temperature rise of the food can be prevented. You can

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a refrigerator according to the present invention.

FIG. 2 is a diagram showing a change in motor current at the time of starting the compressor motor.

FIG. 3 is a flowchart showing an operation for setting a minimum starting time in the embodiment shown in FIG.

FIG. 4 is a configuration diagram showing another embodiment of the refrigerator according to the present invention.

5 is a cross-sectional view showing an arrangement example of electric dampers in the embodiment shown in FIG.

6 is a flowchart showing the operation of the embodiment shown in FIG.
It is

FIG. 7 is a diagram showing an integrated opening time of a door in a refrigerating room and a rise in indoor temperature with respect to an outside air temperature.

FIG. 8 is a diagram showing an increase in the indoor temperature with respect to the input load amount in the refrigerating room.

9 is a diagram showing the indoor temperature control of the freezing compartment upon load application in the embodiment shown in FIG.

FIG. 10 is a circuit diagram showing a specific example of the refrigerator compartment door open / close detector in FIG.

11 is a perspective view showing an arrangement example of the door switches in FIG. 10 in a refrigerator.

FIG. 12 is a flowchart showing the operation of another embodiment of the refrigerator according to the present invention.

FIG. 13 is a diagram showing an increase in indoor temperature with respect to the number of times of opening and closing the door of the refrigerating room.

[Explanation of symbols]

 1 Compressor Motor 1a Main Winding 1b Auxiliary Winding 2 Compressor Intermittent Switch 3 Start Switch 4 Start Detector 5 Commercial Power 6 Microcomputer 7 Start Switch Driver Circuit 8 Intermittent Switch Drive circuit 10 Electric damper 10a Damper motor 10b Electric damper open / close switch 10c Electric damper open / close detector 11 Electric damper switch 12 Refrigerating room temperature detector 13 Refrigerating room door open / close detector 14 Electric damper drive Circuit 15 Freezing room temperature detector 16 Compressor cooling fan drive circuit 18 Refrigerating room 19 Cold air passage 20 Damper 21 Cooling fan 22 Compressor

Claims (11)

[Claims] 1. A compressor for a cooler having a main winding and an auxiliary winding, a start switch for supplying a current to the auxiliary winding when the compressor for the cooler is started, and a start failure of the compressor for the cooler is detected. In the refrigerator equipped with a detector that operates, the control unit that learns the start time of the compressor for the cooler by using the detection output of the detector and sets the minimum start time is provided, and the minimum set by the control unit is set. A refrigerator characterized in that the compressor for the cooler is started at a starting time. 2. A compressor for a cooler having a main winding and an auxiliary winding, a starter switch for supplying a current to the auxiliary winding when the compressor for a cooler is started, and a start-up failure of the compressor for the cooler. In a refrigerator equipped with a detector for detecting and an outside air temperature detector, the starting time of the compressor for the cooler is learned by using the detection output of the detector and the detection output of the outside air temperature detector, and different outside air A control means is provided for setting a minimum start time of the compressor for the cooler for each temperature, and the compressor for the cooler is started at the minimum start time set by the control means in accordance with the detected outside air temperature. Characteristic refrigerator. 3. A compressor for a cooler and a cooling fan motor are turned on / off according to a detection output of a temperature sensor in a freezing room,
In a refrigerator equipped with an electric damper that interrupts the cold air flowing into the refrigerating chamber according to the detection output of the refrigerating chamber temperature sensor, the heat load amount in the refrigerating chamber is estimated, and the set temperature in the refrigerating chamber is set to the estimated heat load amount. A refrigerator provided with a means for controlling the temperature according to. 4. The compressor according to claim 3, wherein the means is the compressor for the cooler and the cooling fan motor.
A refrigerator, wherein a heat load amount in the refrigerating chamber is estimated from an amount of temperature increase in the refrigerating chamber during a turn-off period of the refrigerator. 5. The compressor according to claim 4, wherein the means is the compressor for the cooler and the cooling fan motor.
A refrigerator characterized by learning a pattern of an amount of temperature increase in the refrigerating chamber during a turn-off period of the refrigerator to change a set temperature in the refrigerating chamber. 6. The compressor according to claim 3, wherein the means is the compressor for the cooler and the cooling fan motor.
A refrigerator characterized in that a heat load amount is estimated from an amount of temperature rise in the refrigerating compartment and an outside air temperature during a turn-off period. 7. The compressor according to claim 3, wherein the means is the compressor for the cooler and the cooling fan motor.
A refrigerator characterized in that the heat load is estimated from the amount of temperature rise in the refrigerating compartment and the number of times of opening and closing the door of the refrigerating compartment during the off period of the refrigerator. 8. The means according to claim 3, wherein the means is the compressor for the cooler and the cooling fan motor.
A refrigerator characterized in that a heat load amount is estimated from an amount of temperature rise in the refrigerating room, an outside air temperature, and the number of times of opening and closing a door of the refrigerating room during the off period of the refrigerator. 9. A compressor for a cooler and a cooling fan motor are turned on and off according to a detection output of a temperature sensor in a freezing room,
In a refrigerator equipped with an electric damper that interrupts the cold air flowing into the refrigerating room according to the detection output of the refrigerating room temperature sensor, the opening / closing pattern of the refrigerating room door is learned every day, and the opening / closing pattern is almost the same. The refrigerator is provided with means for changing the set temperature in the refrigerator before and during opening and closing of the door when it continues for several days. 10. A compressor for a cooler and a cooling fan motor are turned on / off according to a detection output of a temperature sensor of a freezing room, and cold air flowing into a refrigeration room is intermittently turned on / off according to a detection output of a temperature sensor of a refrigerating room. A refrigerator equipped with an electric damper is characterized by being provided with means for learning a daily opening / closing pattern of a refrigerating compartment door and setting a temperature inside the refrigerator to a temperature according to the number of times the door is opened / closed. refrigerator. 11. A compressor for a cooler and a cooling fan motor are turned on / off according to a detection output of a temperature sensor of a freezing room, and cold air flowing into a refrigerating room is intermittently connected according to a detection output of a temperature sensor of a refrigerating room. In a refrigerator equipped with an electric damper, means for learning a daily opening / closing pattern of a refrigerator compartment door and setting a temperature inside the refrigerator to a temperature according to the number of times the door is opened / closed and the outside air temperature are provided. A refrigerator characterized by.