JP3515920B2 - refrigerator - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a refrigerator having two evaporators.

[0002]

2. Description of the Related Art In recent years, refrigerators having a refrigerating evaporator and a freezing evaporator have been proposed in order to efficiently cool a refrigerating chamber and a freezing chamber, respectively.

In order to efficiently cool these two evaporators with the refrigerant sent from one compressor (compressor), a three-way valve is arranged in the middle of the refrigerant flow path, and by switching the three-way valve, Refrigerant evaporator (hereinafter,
R Eva. ) Or a freezing evaporator (hereinafter referred to as F evaporator).

Conventionally, a compressor of a DC inverter type has been used, and in a refrigerator equipped with a DC compressor, when the room temperature is medium to high, the cooling capacity can be changed by changing the frequency of the compressor, and alternating cooling is performed. Because it is done, it was not necessary to set the condition at the time of startup.

That is, if it is a DC compressor,
The cooling capacity can be changed by finely adjusting the amount of the refrigerant by changing the inverter frequency, and therefore the evaporation temperature of the F or R evaporation can be adjusted.

Therefore, when the evaporation temperature of the R-evaporator, F-evaporator, etc. becomes too low, the frequency of the inverter may be adjusted to raise the evaporation temperature. Therefore, in order to raise the evaporation temperature (evaporator temperature), There is almost no need to stop the DC compressor. Therefore, in a refrigerator equipped with a DC compressor, it is not necessary to set conditions at startup.

[0007]

In addition to the DC compressor, there is an AC compressor, and this AC compressor has the merit that the cost is lower than that of the DC compressor. However, in a refrigerator equipped with an AC compressor, unlike the DC compressor, the AC compressor cannot be adjusted depending on the frequency.
Since the evaporation temperature becomes too low, it is necessary to stop the AC compressor in a timely manner. Therefore, in a refrigerator equipped with an AC compressor, it is necessary to set the conditions when starting up.

However, in a refrigerator equipped with an AC compressor, since it is turned off during the operation cycle, the refrigerating room, the vegetable room, etc. are cooled (hereinafter referred to as R cooling) at the time of startup, or the freezing room is cooled (hereinafter referred to as R cooling). It is called F cooling.)
When the selection of whether to perform is performed only by the ON / OFF temperature of the sensor, the following problems occur.

The first problem is that the operating rate is high. That is, since the operation is performed until the OFF temperature is reached, the operation rate increases.

The second problem is that the temperature inside the refrigerating room rises abnormally (the details of this problem will be described in detail in Examples).

In view of the above problems, the present invention provides a refrigerator intended to reduce the operating rate at the time of starting the compressor and prevent the temperature inside the refrigerator from rising.

[0012]

According to the invention of claim 1, a compressor, a condenser, a refrigerating diaphragm mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a freezing diaphragm mechanism, and a freezing compartment. Refrigerator evaporator is connected to form a refrigerant flow path,
By switching the refrigerant flow path by the valve mechanism, there are at least a refrigerating mode in which the refrigerant flows through the refrigerating throttle mechanism to the refrigerating evaporator and a refrigerating mode in which the refrigerant flows through the refrigerating throttle mechanism only to the freezing evaporator. In a refrigerator equipped with a refrigerating compartment sensor that detects the temperature of the refrigerating compartment and a freezing compartment sensor that detects the temperature of the freezing compartment by performing alternating cooling operation that can be realized alternately, the detected temperature of the refrigerating compartment sensor becomes the refrigeration ON temperature. When the temperature of the freezer compartment sensor reaches the freezing ON temperature, the refrigerating mode is performed first.
After that, the refrigerating priority cooling control for shifting to the freezing mode and, when shifting from the refrigerating mode to the freezing mode, the refrigerating compartment is kept at the refrigerating ON temperature until the refrigerating mode becomes the freezing OFF temperature or lower.
The refrigerator is characterized by comprising a first control means for performing freezing and cooling control that continues even when the temperature reaches a certain level.

The invention of claim 2, the first control means have rows refrigeration priority cooling control when room temperature outside air temperature sensor detects is higher than a predetermined temperature, lower than said predetermined temperature, and cooling
When the temperature detected by the freezer compartment sensor is higher than the freezing ON temperature, it is cooled.
The refrigerator according to claim 1, which is in a freezing mode .

[0014] The invention of claim 3, the first control means have rows refrigeration priority cooling control when higher than the temperature at which the detected temperature of the refrigerating compartment sensor is preset, lower than the preset temperature
And the temperature detected by the freezer compartment sensor is lower than the freezing ON temperature.
The refrigeration mode is performed when the temperature is high.
It is the described refrigerator.

According to a fourth aspect of the present invention , when the temperature detected by the freezer compartment sensor falls below the freezing OFF temperature during the freezing mode,
The refrigerator according to claim 1, further comprising second control means for stopping the compressor when the temperature detected by the cold storage chamber sensor is equal to or lower than the cold storage ON temperature.

According to a fifth aspect of the present invention, when the temperature detected by the refrigerating compartment sensor falls below the refrigerating OFF temperature during the refrigerating mode,
Claim 1, the temperature detected by the freezing compartment sensor is characterized by stopping the compressor if less refrigeration OFF temperature
It is the described refrigerator.

According to a sixth aspect of the invention, the second control means is provided in the refrigerator provided with the switching chamber capable of setting the temperature inside the freezing temperature zone to the refrigerating temperature zone and the switching chamber sensor for detecting the temperature of the switching chamber. 5. The refrigerator according to claim 4, wherein the switching chamber is used as a freezing mode, and the compressor is stopped when the switching chamber sensor has a freezing ON temperature or lower.

According to a seventh aspect of the present invention, a compressor, a condenser, a refrigerating expansion mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a freezing restricting mechanism, and a freezing evaporator corresponding to a freezing compartment. To form a refrigerant flow path, and the valve mechanism switches the refrigerant flow path, and at least a refrigerating mode in which the refrigerant flows through the refrigerating evaporator to the refrigerating evaporator, and a freezing via the freezing restricting mechanism. Refrigerator that performs alternate cooling operation that can alternately realize the freezing mode in which the refrigerant flows only to the evaporator, and that the freezing evaporator and the refrigeration evaporator are provided with defrosting heaters and can perform defrosting operation respectively In the above, if there is no opening / closing of the door from the start to the end of defrosting immediately before, the recovery operation after defrosting is performed by intermittent operation of the compressor in a time-divided manner for a specific time, and during this intermittent operation, the freezer compartment And the refrigerator compartment are alternately cooled A refrigerator, characterized in that it comprises a third control means.

According to an eighth aspect of the present invention, the third control means performs the intermittent operation when the opening and closing of the door of the refrigerating room, the freezing room and the like is performed at least once between the start and the end of the immediately preceding defrosting. The refrigerator according to claim 7, wherein the refrigerator is released.

In the ninth aspect of the invention, the third control means opens and closes the doors of the refrigerating room, the freezing room, etc. between the start and the end of the immediately preceding defrosting, and the cumulative time of opening is longer than a predetermined time. In the case, the intermittent operation is canceled.
It is the described refrigerator.

According to a tenth aspect of the present invention, the third control means includes, during the intermittent operation, when the refrigerating compartment sensor for detecting the temperature of the refrigerating compartment detects the refrigerating ON temperature or higher, or the freezing for detecting the temperature of the freezing compartment. 8. The refrigerator according to claim 7, wherein the intermittent operation is canceled when the room sensor detects the freezing ON temperature or higher.

The invention according to claim 11 is the refrigerator according to claim 7, characterized in that the third control means releases the intermittent operation when a forced cooling operation command for freezing or refrigerating cooling is inputted.

The invention of claim 12 is a compressor,
A condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to the refrigerating compartment, a freezing throttle mechanism, and a freezing evaporator corresponding to the freezing compartment are connected to form a refrigerant flow path, and a valve mechanism is provided. The refrigerant flow path is switched by means of at least the refrigerating mode in which the refrigerant is flown to the refrigerating evaporator via at least the refrigerating throttle mechanism and the refrigerating mode in which the refrigerant is flown only to the freezing evaporator via the refrigerating throttle mechanism. A refrigeration fan that performs the alternating cooling operation that can be realized and blows the air cooled by the refrigeration evaporator to the freezing compartment,
In a refrigerator having a switching chamber in which the temperature setting for cooling with a freezing evaporator and a freezing fan can be controlled from the freezing temperature zone to the refrigeration temperature zone, the temperature setting of the switching room is set to the freezing temperature zone. In this case, the refrigerator is provided with a fourth control means for continuously operating the freezing fan even during cooling of the refrigerating compartment.

The thirteenth aspect of the invention is the refrigerator according to the twelfth aspect, wherein the fourth control means stops the refrigeration fan when the compressor is stopped.

In the fourteenth aspect of the invention, the compressor is a D
When the C inverter compressor is used, the fourth control means continuously rotates the refrigeration fan at a rotation speed corresponding to the operating frequency of the compressor.
The refrigerator according to 2.

According to the refrigerator of the first aspect, the operation rate can be reduced and the temperature rise in the refrigerator can be prevented by performing the R cooling first.

According to the refrigerator of the second aspect, by not performing the control at low room temperature, it is possible to prevent the temperature of the refrigerating room from being lowered more than necessary.

According to the third aspect of the refrigerator, the temperature starts from F cooling when the temperature inside the refrigerating compartment is below a certain temperature at which there is no fear of an increase in the temperature inside the refrigerating compartment, so that the temperature inside the refrigerating compartment can be efficiently controlled. You can

According to the refrigerators of claims 4 to 6, the alternate cooling can be stably performed in a cycle including the stop of the compressor, and wasteful operation can be reduced.

According to the refrigerator of claim 7, the recovery operation after defrosting is performed by the intermittent operation of the time-divided compressor, so that the increase in power consumption can be suppressed.

According to the refrigerators of claims 8 to 11,
Since the intermittent operation is canceled in a certain case, the internal temperature of the refrigerating room or the freezing room can be lowered quickly, and the food is not damaged.

According to the refrigerators of claims 12 to 14, it is possible to improve the difference in temperature distribution between the switching chamber and the freezing chamber, and as a result, it is possible to reduce the operating rate and suppress an increase in power consumption. You can

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION A refrigerator 10 according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1A is a front view of the refrigerator 10,
FIG. 1B is a sectional view thereof. FIG. 2 is a vertical cross-sectional view of the refrigerator 10 as seen from the side, and also serves to explain the electric system. FIG. 13 is an explanatory diagram of the refrigeration cycle of the refrigerator 10.

First, a description will be given with reference to FIG.

The cabinet 12 of the refrigerator 10 includes a refrigerator compartment 14, a vegetable compartment 16, an ice making compartment 17, and a freezing compartment 18 from the top.
Is provided. An individual switching chamber 19 is provided on the side of the ice making chamber 17 via a partition wall. The switching chamber 19 can control the set temperature in the refrigerator from the freezing temperature zone to the refrigerating temperature zone. Furthermore, the refrigerator compartment 14
A display panel 15 is arranged on the door of the.

An AC type compressor, that is, a machine room 2 in which a compressor 20 is arranged, is provided at the bottom of the rear surface of the freezing room 18.
Two are provided. Further, a freezer compartment evaporator (hereinafter referred to as “F evaporator”) 24 is disposed behind the freezer compartment 18, and
Above the evaporator 24, a freezer compartment fan (hereinafter referred to as F fan) 26 that blows the cool air generated in the F compartment 24 to the freezer compartment 18 is provided. Below the F Eva 24, F
A defrost heater (hereinafter, referred to as F defrost heater) 28 for defrosting the evaporator 24 is provided. An F-eva sensor 30 for detecting the temperature of the F-eva 24 is provided near the upper portion of the F-eva 24.

Inside the freezer compartment 18, a temperature sensor for the freezer compartment (hereinafter referred to as F sensor) 3 for measuring the temperature inside the refrigerator 3
Two are provided.

On the back surface of the vegetable compartment 16, a refrigerator evaporator (hereinafter referred to as R evaporator) 34 is provided.
Above the 4 is a fan for the refrigeration room (hereinafter referred to as R fan)
36 is provided, and an R evaluation sensor 38 that detects the temperature of the R evaluation 34 is provided. Below the R Eva 34, R
A defrost heater (hereinafter, referred to as R defrost heater) 40 for defrosting the evaporator 34 is provided.

Inside the refrigerating compartment 14, a refrigerating compartment temperature sensor (hereinafter referred to as R sensor) for measuring the temperature inside the refrigerator.
42 are provided.

Further, an outside air temperature sensor 90 is arranged on the upper surface of the cabinet 12.

Then, the F fan 26, the F defrost heater 28, the F ever sensor 30, the F sensor 32, and the R fan 3 are provided.
6, the R evaporation sensor 38, the R defrost heater 40, and the R sensor 42 are connected to a control device 44 including a microcomputer. Further, the outside air temperature sensor 90 and the switching chamber sensor 92 shown in FIG. 1B are also connected to the control device 44. The control device 44 is composed of one board and is provided on the upper rear surface of the cabinet 12. The motor of the compressor 20 is also connected to the control device 44.

Next, the flow of cold air will be described with reference to FIG.

The cold air cooled by the F evaporator 24 is F
The air is blown by the fan 26 and circulates in the freezer compartment 18. Further, the cool air blown by the F fan 26 flows into the switching chamber 19 via the damper device 94. And switching room 1
The temperature inside the refrigerator 9 is controlled by opening / closing the damper device 94. Furthermore, the cold air cooled by the R-evaporator 34 is
The R fan 36 blows air to the vegetable compartment 16 and the refrigerator compartment 14 to circulate it.

Next, the structure of these refrigeration cycles will be described with reference to FIG.

A condenser 46 is connected to the compressor 20, and a three-way valve 68 is connected to the condenser 46. One of the bifurcated refrigerant flow paths from the three-way valve 68 is connected to the R evaporator 34 via a refrigerating chamber capillary tube (hereinafter, referred to as R capillary tube) 50. Also,
The other refrigerant flow path separated from the three-way valve 68 is a freezer compartment capillary tube (hereinafter referred to as an F capillary tube).
It is connected to 52. Then, the refrigerant channels of the F capillary tube 52 and the R evaporation 34 become one, and the F evaporation 2
4 and further to the compressor 20.

The operation state of the refrigerator 10 will be described.

1. Alternate Cooling Operation (1) Refrigerating Mode (R Cooling) The three-way valve 68 is switched to allow the refrigerant to flow to the R and F eva 34 and 24. When the R fan 36 and the F fan 26 are operated, respectively, the cooled air is
It is sent to the refrigerator compartment 14, the vegetable compartment 16, and the freezer compartment 18, and these rooms are cooled. Hereinafter, this state is referred to as a refrigerating mode.

(2) Refrigeration mode (F cooling) The three-way valve 68 is switched so that the refrigerant flows only to the F capillary tube 52 and the F evaporator 24. And F
Only the fan 26 is operated. In this state, F Eva 2
The cold air cooled by 4 is sent only to the freezer compartment 18 by the F fan 26, and the internal temperature of the compartment decreases. And, cold air is not sent into the refrigerator compartment 14. Hereinafter, this state is referred to as a freezing mode.

(3) Alternate cooling operation The alternating operation of the freezing mode and the refrigerating mode is called the alternate cooling operation operation.

2. Control Operation at Startup of Compressor 20 FIG. 3 is a diagram showing a control operation at startup of the compressor 20. FIG. 3A shows conventional control, that is, the temperature detected by the F sensor 32 is the ON temperature (F cooling is performed. temperature)
3B shows the case where F cooling is performed when
Shows the control operation of the present invention.

Now, the operation of FIG. 3A will be described to explain the problems in this case. That is, in a refrigerator equipped with an AC compressor, the operation cycle is turned off except when overloaded. Then, when the F sensor 32 becomes the ON temperature and the F cooling is performed as it is when the compressor 20 is started, the R sensor 42 does not shift to the R cooling until the F cooling is completed. Occasionally, the temperature detected by the R sensor 42 becomes equal to or higher than the ON temperature, that is, the temperature inside the refrigerator compartment 14 or the like rises abnormally. Further, as another problem, if F cooling is performed first, the operation cycle becomes longer in the order of F cooling → R cooling → F cooling → stop, and the operation rate increases.

More specifically, FIG. 3A
, The compressor 20 is off until time t1
At time t1, the temperature detected by the F sensor 32 becomes ON temperature, and F cooling is performed until time t2. On the other hand, since the temperature detected by the R sensor 42 is close to the ON temperature (the temperature for R cooling) at time t1, R cooling is not performed until time t2. Therefore, the refrigerating compartment 14 (hereinafter referred to as the vegetable compartment 16)
(Including the temperature)) will rise abnormally above the ON temperature. Then, at the time t2, when the F cooling OFF temperature (the temperature at which the F cooling is stopped) is reached, the R sensor 42 performs R cooling for the ON temperature or higher.

Then, at time t3, the R sensor 42 is turned off.
When the temperature (the temperature at which the R cooling is stopped) is reached, the internal temperature of the freezer compartment 18 rises and the F cooling is performed. When the F sensor 32 reaches the OFF temperature, the F cooling is stopped.
At this time, since the R sensor 42 is also below the ON temperature, the compressor 20 is turned off (stopped). Therefore, F
If cooling is performed first, F cooling → R cooling → F cooling → stop,
That is, the operating cycle becomes longer and the operating rate increases.

On the other hand, if the R cooling is performed first, the above-mentioned temperature rise in the refrigerating chamber 14 can be prevented, but on the contrary, the temperature rise in the freezing chamber 18 becomes a concern, but the R cooling is 10 minutes. There is no problem because it is short. Further, by performing the R cooling first, the operation cycle becomes a cycle of R cooling → F cooling → stop, and the operation time is reduced by one “F cooling”, and as a result, the operation rate is reduced. .

This control operation will be described with reference to FIG. 3B. Even if the F sensor 32 reaches the ON temperature at time t1, R cooling is performed without performing F cooling, and the R sensor 4 is used.
F cooling is performed until 2 reaches the OFF temperature. On the other hand, F
Since the sensor 32 is above the ON temperature, the time t2
To cool F. Then, F cooling is performed until the F sensor 32 reaches the OFF temperature, and since the R sensor 42 is equal to or lower than the ON temperature at the time t3, the compressor 20 is turned OFF until the next start condition after the time t3.

In FIG. 3 (b), from R cooling to F
When the temperature shifts to cooling, the temperature detected by the F sensor 32 is equal to or higher than the ON temperature. Even when the temperature detected by the F sensor 32 is equal to or lower than the ON temperature, the F cooling is performed until the temperature is equal to or lower than the OFF temperature. There is. Thereby, the freezer 18
Can be efficiently cooled, and the temperature rise in the freezer compartment 18 can be prevented.

In this way, as shown in FIG. 3A, if the F sensor 32 reaches the ON temperature and the F cooling is performed first, the temperature rise in the refrigerating chamber 14 becomes slower, so that T1
> T1 '. Then, the R cooling time also becomes longer, and R1> R1 '(formula). When R1> R1 ', the F temperature increase of the R cooling time (temperature increase in the freezer compartment 18) becomes T2>T2', resulting in F1 +
F2> F1 '(formula).

From the above equations and equations, F1 + R1 + F2> R1 '+ F1', and the operating time of the present invention can be shortened.

FIG. 4 is a flow chart showing the above control operation. That is, the compressor 20
(Note that in the flowchart, it is expressed as "Comp".) When F is OFF, as shown in step S1,
Sensor 32 is above the ON temperature, or R sensor 4
If 2 is equal to or higher than the ON temperature, the process proceeds to step S2, the compressor 20 is turned on, and R cooling is performed (see step S3).

Next, in step S4, the R sensor 4
When 2 is below the OFF temperature, R cooling is changed to F cooling, and when the F sensor 32 is below the OFF temperature (see step S6), when the R sensor 42 is below the ON temperature (see step S7), Compressor 20 is O
It becomes FF.

As described above, in this embodiment, by performing the R cooling first, it is possible to prevent the temperature inside the refrigerating chamber 14 from rising abnormally, and to reduce the F cooling by one time. As a result, the operating rate can be reduced.

Next, an embodiment in which the above control is not performed when the temperature inside the refrigerator in which the refrigerator is placed detected by the outside air temperature sensor 90 is low will be described with reference to the flowchart of FIG. FIG. 5 shows steps S1 to S1 shown in FIG.
Steps S8 to S1 are added to step S7. In step S8, if the room temperature detected by the outside air temperature sensor 90 is low, the process proceeds to step S9, and if the F sensor 32 is equal to or higher than the ON temperature, the process proceeds to step S5 to perform F cooling. If the F sensor 32 is below the ON temperature in step S9, step S1
0, and if the R sensor 42 is equal to or higher than the ON temperature, the process proceeds to step S3 to perform R cooling, and the R sensor 42 becomes O
If the temperature is lower than the N temperature, the process returns to step S8.

In this embodiment, at low room temperature where the R cooling cycle is small, R is performed once every 2 to 4 operating cycles.
Since it is only to cool, it is not necessary to incorporate the above control. On the contrary, if control is incorporated even in the case of low room temperature, R cooling is included in each cycle at low room temperature.
Will cause a decrease in temperature. Therefore, when the room temperature is low as in the present embodiment, the refrigerating chamber 14 can be prevented from lowering in temperature more than necessary by not performing the above-mentioned control.

FIG. 6 shows the conditions under which R cooling is performed first.
It shows a flowchart of an embodiment in which the temperature detected by the R sensor 42 is higher than a preset value (temperature). If the F sensor 32 is equal to or higher than the ON temperature in step S11, the process proceeds to step S12, the compressor 20 is turned ON, and if the R sensor 42 is lower than a predetermined threshold value (3 ° C.) in step S13, refrigeration is performed. Since there is no concern that the temperature inside the chamber 14 will rise, proceed to step S16
Cool down. In step S13, the R sensor 42
However, if the temperature is higher than a predetermined threshold value (3 ° C.), the temperature inside the refrigerating compartment 14 may rise, so R cooling is performed (see step S14). Then, step S15
When the R sensor 42 has become equal to or lower than the OFF temperature, the F cooling is performed (step S16).

Next, when the F sensor 32 is below the OFF temperature, the routine proceeds to step S18, and when the R sensor 42 is below the ON temperature, the compressor 20 is stopped,
If the R sensor 42 is higher than the ON temperature, step S1
Returning to step 4, R cooling is performed.

As described above, in this embodiment, since the R cooling is started only when the temperature of the R sensor 42 is equal to or higher than a certain temperature, there is no fear that the temperature inside the refrigerating chamber 14 will rise. Below the temperature, the control is to start from F cooling.

Therefore, the temperature inside the freezer compartment 18 can be efficiently controlled.

3. Control operation when the compressor 20 is stopped By the way, a conventional DC inverter compressor is installed, two evaporators (coolers) for refrigeration and freezing, a fan, and a three-way valve (switching valve) In the refrigerator which employs the method of alternating cooling by), the refrigerator operation is performed by the DC inverter type compressor.

However, refrigerating and freezing evaporators 24, 3
4, the refrigerator of the present invention equipped with the AC compressor 20 having the fans 26, 36 and alternately cooled by the three-way valve 68 requires a control different from that of the DC compressor when the compressor 20 is stopped.

That is, if the AC compressor 20 is installed and the compressor 20 is continuously operated, it will be overcooled. Therefore, it is necessary to set a condition for stopping the compressor 20.

In FIG. 7, the F sensor 32 is OFF during F cooling.
When the temperature becomes lower than the temperature, if the R sensor 42 is also lower than the ON temperature, the flow chart shows a case where the compressor 20 is stopped. Referring to FIG. 7, when the F sensor 32 is currently being cooled, and the F sensor 32 is below the OFF temperature in step S21, the process proceeds to step S22, where R
It is determined whether or not the sensor 42 is below the ON temperature. If the R sensor 42 is below the ON temperature, the process proceeds to step S23 to stop the compressor 20. If the R sensor 42 is higher than the ON temperature in step S22, the process proceeds to step S24 to perform R cooling.

In FIG. 8, the R sensor 42 is turned off during R cooling.
When the temperature falls below the temperature, if the F sensor 32 is below the OFF temperature, the flow chart shows a case where the compressor 20 is stopped. In FIG.
In step S31 during R cooling, the R sensor 42 becomes O
When the temperature is below the FF temperature, the routine proceeds to step S32, where it is determined whether or not the F sensor 32 is below the OFF temperature. If the F sensor 32 is below the OFF temperature in step S32, the process proceeds to step S33 to stop the compressor 20. If the F sensor 32 is higher than the OFF temperature in step S32, the process proceeds to step S34 to perform F cooling.

In the control shown in FIGS. 7 and 8, the R fan 36 is rotated even when the compressor 20 is stopped. By rotating the R fan 36, it is possible to send cold air containing humidity into the refrigerating compartment 14 and prevent food from drying.
In this way, even when the compressor 20 is stopped, freshness can be preserved and liquid back can be prevented. Moreover, the R fan 36 can also be defrosted by rotating the R fan 36.

Further, FIGS. 9 and 10 show the case where the switching chamber 19 which can be arbitrarily set to the temperature from the freezing temperature zone to the refrigerating temperature zone is provided, and the switching chamber 19 is used in the freezing mode. At this time, there are shown respective flowcharts in the case where the compressor 20 is stopped when the switching chamber sensor 92 for detecting the internal temperature of the switching chamber 19 is equal to or lower than the ON temperature. Note that FIG. 9 shows a flowchart corresponding to FIG. 7 during F cooling, and FIG. 10 shows a flowchart corresponding to FIG. 8 during R cooling.

In FIG. 9, when the F sensor 32 is lower than the OFF temperature during F cooling in step S41, and when the switching chamber 19 sensor is lower than the ON temperature of the switching chamber 19 as shown in step S42, the step is performed. In step S43, the R sensor 42 is compared with the ON temperature. R from ON temperature
When the sensor 42 is low, the process proceeds to step S44 and the compressor 20 is stopped. Also, step S43
If the R sensor 42 is higher than the ON temperature in step S,
The process proceeds to 45 and R cooling is performed.

Further, in FIG. 10, when the R sensor 42 is under the OFF temperature during R cooling, the process proceeds to step S52, and when the F sensor 32 is lower than the OFF temperature, the process proceeds to step S53. When the switching chamber 19 sensor temperature is lower than the ON temperature in step S53, the process proceeds to step S54 and the compressor 20 is stopped. If the F sensor 32 is higher than the OFF temperature in step S52, the process proceeds to step S55 to perform F cooling.

As described above, the present embodiment is a refrigerator having two evaporators 24 and 34 for refrigeration and freezing, and even when the compressor 20 is an AC type, it is stable including stop of the compressor 20. Alternate cooling can be performed in cycles, and wasteful operation can be reduced.

4. Defrosting Operation In the refrigerator 10, when performing the defrosting operation, from the structure of the refrigeration cycle shown in FIG. 13, the case where the F eva 24 and the R eva 34 are defrosted by the defrost heaters 28 and 40 at the same time, Only the evaporator 24 may be defrosted by the F defrosting heater 28.

5. Control operation at the time of defrosting recovery immediately after defrosting operation By the way, the refrigerant circuit of the refrigerator equipped with the conventional DC inverter type compressor is basically the same as that shown in FIG. 13, and in the case of the present invention in FIG. Compressor 2
0 is an AC type, and the conventional compressor is a DC inverter type. With these refrigeration cycles, the freezer 1
When the refrigerator is capable of cooling only 8 or cooling the refrigerating room 14 and the freezing room 18 and the inside of the refrigerator is lightly loaded, the power consumption is suppressed by varying the compressor capacity (frequency variable) for the return operation after defrosting. It is like this.

However, when the compressor 20 is of the AC type as in the present invention, some ingenuity is required.
Even if the load is light after the defrosting operation, if the continuous operation is performed, the power consumption increases. Therefore, in this embodiment,
By performing the recovery operation after defrosting intermittently in time division,
This is to suppress the increase in power consumption.

FIG. 11 shows a case of control at the time of recovery after defrosting in the case of a DC inverter type compressor. After defrosting, the frequency of the compressor inverter is set to 50 Hz or less until the control time (for example, about 2 hours). After the operation, the frequency of the inverter is changed (for example, raised to 67 Hz) to perform normal control.

FIG. 13 shows a control method according to the present invention. When the AC compressor 20 is used, when the load is light without opening and closing the door immediately before defrosting, the recovery after defrosting is performed. The operation is intermittently performed by time division, and the freezing compartment 18 and the refrigerating compartment 14 are alternately cooled during the operation.

That is, as shown in FIG. 13, during the return operation after defrosting, first, the compressor 20 is driven to perform R cooling, and then F cooling is performed. Then, the compressor 20 is stopped for a predetermined time, and thereafter, the R cooling and the F cooling are alternately cooled. The time for the return operation after the defrosting is, for example, 2 hours, and after the control time of 2 hours, normal control, that is, alternate cooling is performed according to the internal cold storage temperature. The total cooling time of R cooling and F cooling is, for example, 40 minutes, and the stop time of the compressor 20 is, for example, 20 minutes.

As described above, by performing the recovery operation after defrosting intermittently by time division, it is possible to suppress an increase in power consumption.

By the way, if the frequency of opening and closing the doors of the refrigerating room 14, the freezing room 18 and the like is high during the period immediately before the start of defrosting to the end, for example, if it is more than once, it is judged that the load is large, and the compressor 20 of the compressor 20 is closed. I try not to perform intermittent operation.

As a result, the internal temperature of the refrigerating room 14 and the freezing room 18 can be quickly lowered.

Further, when the doors of the refrigerating room 14, the freezing room 18 and the like are opened and closed between the start and the end of the immediately preceding defrosting, and when the accumulated time during which the doors are opened is long, for example, 30 seconds or more, It is determined that the load is large, and priority is given to cooling so that the intermittent operation of the compressor 20 is not performed.

As a result, the temperature inside the refrigerator compartment 14 or the freezer compartment 18 can be lowered quickly.

Further, when the R sensor 42 in the refrigerating compartment 14 or the F sensor 32 in the freezing compartment 18 detects the ON temperature or higher during the intermittent operation, the intermittent operation of the compressor 20 is canceled by giving priority to cooling. I am trying to do it.

As a result, the temperature inside the refrigerator compartment 14 or the freezer compartment 18 can be lowered quickly.

When a forced cooling operation mode such as ice making, freezing or refrigerating is entered, the intermittent operation of the compressor 20 is canceled.

As a result, the forced cooling operation such as ice making, freezing and refrigerating can be performed, and the operation can be performed without impairing the functions of so-called one-piece ice making, one-piece freezing and one-piece refrigeration.

6. Control operation of switching chamber 19 When the temperature setting of the switching chamber 19 is set to the freezing temperature zone, the load temperature of the switching chamber 19 and the freezing chamber 18 are set.
There is a temperature difference between the load temperature and the load temperature. As a result, in order to reduce the load temperature of the switching chamber 19, the operating rate (or DC
Inverter compressors result in higher operating frequency, resulting in higher power consumption.

Therefore, in the present embodiment, when the temperature setting of the switching chamber 19 is set to the freezing temperature zone, the difference in temperature distribution inside the switching chamber 19 and the freezing chamber 18 is improved, and as a result, the operating rate is increased. By lowering, the increase in power consumption is suppressed.

That is, the temperature setting for cooling by the freezing evaporator 24 and the freezing room fan 26 is such that the temperature of the switching chamber 19 that can control the temperature from the freezing temperature zone to the refrigerating temperature zone is set to the freezing temperature zone. If so, the freezer compartment fan 26 is controlled to continuously operate even while the refrigerating compartment 14 is being cooled. By continuously operating the freezing compartment fan 26, it is possible to prevent the internal temperatures of the switching compartment 19 and the freezing compartment 18 from rising and improve the difference in the internal temperature distribution between the switching compartment 19 and the freezing compartment 18. As a result, the operating rate can be reduced and the increase in power consumption can be suppressed.

Further, when the compressor 20 is stopped, the continuous rotation of the freezer compartment fan 26 is also stopped. Also in this case, the difference in temperature distribution inside the switching chamber 19 and the freezing chamber 18 can be improved, and the operation of the freezing chamber fan 26 is stopped, so that the increase in power consumption can be suppressed.

7. Modification Example of Control Operation of Switching Chamber 19 (1) In the above case, the case where the compressor 20 is an AC type has been described, but the present invention can be applied even when the compressor is a DC inverter type. That is, when the DC inverter compressor is stopped, the continuous rotation of the freezer compartment fan 26 is also stopped in the same manner as described above. Also in this case, the difference in temperature distribution inside the switching chamber 19 and the freezing chamber 18 can be improved, and the operation of the freezing chamber fan 26 is stopped, so that the increase in power consumption can be suppressed.

(2) In the case of the DC inverter compressor, continuous rotation is performed at the rotation speed of the freezer compartment fan 26 corresponding to the operating frequency of the compressor.

That is, the temperature setting for cooling by the freezing evaporator 24 and the freezing chamber fan 26 is such that the temperature of the switching chamber 19 can be controlled from the freezing temperature zone to the refrigeration temperature zone by setting it to the freezing temperature zone. If so, the freezer compartment fan 26 is controlled to continuously operate even while the refrigerating compartment 14 is being cooled. In this case, the rotation frequency of the freezer compartment fan 26 is controlled to be proportional to the operating frequency of the DC inverter compressor. This freezer fan 26
It is possible to prevent the internal temperature of the switching chamber 19 and the freezing chamber 18 from rising by the continuous operation of, and improve the internal temperature distribution difference between the switching chamber 19 and the freezing chamber 18. As a result, the operating rate can be reduced and the increase in power consumption can be suppressed.

[0101]

As described above, according to the refrigerator of the present invention, R
By cooling first, the operating rate can be reduced, and
It is possible to prevent the temperature inside the refrigerator from rising.

When the F sensor is below the OFF temperature during the F cooling, the compressor is stopped if the R sensor is also below the ON temperature, so that alternate cooling can be performed in a stable cycle, resulting in wasteful operation. Can be reduced.

Further, by performing the recovery operation after defrosting by the time-divided intermittent operation, it is possible to suppress an increase in power consumption.

Further, when the temperature setting of the switching chamber is set to the freezing temperature zone, the freezing fan is continuously operated even during the cooling of the refrigerating chamber, so the difference in temperature distribution between the switching chamber and the freezing chamber is improved. And as a result, the operating rate can be lowered,
It is possible to suppress an increase in power consumption.

[Brief description of drawings]

FIG. 1A is a front view of a refrigerator of this embodiment.
(B) is sectional drawing of the refrigerator of a present Example.

FIG. 2 is an explanatory diagram of a refrigerator according to this embodiment.

FIG. 3A is a diagram showing conventional control at the time of starting the compressor. (B) is a figure which shows control of this invention at the time of a compressor starting.

FIG. 4 is a flowchart showing a control operation at the time of starting the compressor.

FIG. 5 is a flowchart showing a control operation at the time of starting the compressor.

FIG. 6 is a flowchart showing a control operation at the time of starting the compressor.

FIG. 7 is a flowchart showing a control operation when the compressor is stopped.

FIG. 8 is a flowchart showing a control operation when the compressor is stopped.

FIG. 9 is a flowchart showing a control operation when the compressor is stopped.

FIG. 10 is a flowchart showing a control operation when the compressor is stopped.

FIG. 11 is a diagram showing a control operation in the DC inverter compressor immediately after the defrosting operation.

FIG. 12 is a diagram showing a control operation immediately after the defrosting operation in the AC compressor.

FIG. 13 is an explanatory diagram of a refrigeration cycle.

[Explanation of symbols]

10 refrigerator 20 compressor 24 F Eva 26 Fan for freezer 28 Defrost heater 30 F EVA sensor 32 F sensor 34 R Eva 38R EVA sensor 44 Control device 68 three-way valve

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshihiro Yoshioka 1-6 Ota Toshiba-cho, Ibaraki-shi, Osaka Inside the Toshiba Osaka factory (72) Inventor Yoshiro Naemura 1-6 Ota-Toshiba-cho, Ibaraki-shi, Osaka Issued by Toshiba Corporation Osaka Factory (56) Reference JP-A-58-217164 (JP, A) JP-A-10-332242 (JP, A) JP-A-59-41751 (JP, A) JP-A-10- 47827 (JP, A) JP 59-41753 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25D 11/02

Claims (14)

(57) [Claims] 1. A refrigerant by connecting a compressor, a condenser, a refrigerating expansion mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a freezing restricting mechanism, and a freezing evaporator corresponding to a freezing compartment. Refrigerant mode that configures the flow path and switches the refrigerant flow path by the valve mechanism to flow the refrigerant to the refrigeration evaporator at least via the refrigeration throttle mechanism, and the refrigerant only to the freezing evaporator via the refrigeration throttle mechanism. In a refrigerator equipped with a refrigerating compartment sensor that detects the temperature of the refrigerating compartment and a refrigerating compartment sensor that detects the temperature of the freezing compartment, the refrigerating compartment sensor detects the temperature of the refrigerating compartment. When the temperature reaches the refrigerating ON temperature, the refrigerating mode is performed. When the temperature detected by the freezer compartment sensor reaches the freezing ON temperature, the refrigerating mode is performed first, and then the refrigerating priority cooling control is performed to shift to the freezing mode. Refrigerated When moving from over de in the refrigeration mode, the refrigerating compartment is refrigerated O until the freezing mode below freezing OFF temperature
A refrigerator characterized by comprising a first control means for performing a refrigerating / cooling control that continues even at N temperature . Wherein the first control means, when room temperature outside air temperature sensor detects is higher than a predetermined temperature have rows <br/> refrigeration priority cooling control, lower than said predetermined temperature, or
If the temperature detected by the freezer compartment sensor is higher than the freezing ON temperature,
The refrigerator according to claim 1, wherein the refrigerator is in a freezing mode . 3. A first control means have rows refrigeration priority cooling control when higher than the temperature at which the detected temperature of the refrigerating compartment sensor is preset, the preset temperature
And the temperature detected by the freezer compartment sensor is the freezing ON temperature.
The refrigerator according to claim 1, wherein the refrigerator is in a freezing mode when the temperature is higher . 4. When the temperature detected by the freezer compartment sensor is below the freezing OFF temperature during the freezing mode, and if the detected temperature of the refrigerating compartment sensor is below the refrigeration ON temperature, the second control means is provided to stop the compressor. Claims characterized by
The refrigerator according to Item 1 . 5. The compressor is stopped when the detected temperature of the refrigerating compartment sensor is below the refrigerating OFF temperature during the refrigerating mode and the detected temperature of the freezing compartment sensor is below the freezing OFF temperature. Refrigerator according to 1 . 6. A refrigerator comprising a switching chamber capable of setting the temperature inside the refrigerator from a freezing temperature zone to a refrigerating temperature zone and a switching chamber sensor for detecting the temperature of the switching chamber, wherein the second control means controls the switching chamber. The refrigerator according to claim 4, wherein the refrigerator is used in a freezing mode, and the compressor is stopped when the switching chamber sensor has a freezing ON temperature or lower. 7. A refrigerant by connecting a compressor, a condenser, a refrigerating expansion mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a freezing restricting mechanism, and a freezing evaporator corresponding to a freezing compartment. Refrigerant mode that configures the flow path and switches the refrigerant flow path by the valve mechanism to flow the refrigerant to the refrigeration evaporator at least via the refrigeration throttle mechanism, and the refrigerant only to the freezing evaporator via the refrigeration throttle mechanism. In the refrigerator that can perform defrosting operation, the freezing mode and the refrigerating evaporator are provided with defrosting heaters. If the door does not open and close between the start and end of frost,
Compressor only time divided specific time of the return operation after defrosting
A refrigerator characterized by comprising third control means for performing intermittent operation of a sir and alternately cooling the freezing compartment and the refrigerating compartment during the intermittent operation. 8. The third control means releases the intermittent operation when the doors of the refrigerating room, the freezing room and the like are opened and closed at least once between the start and the end of defrosting immediately before. The refrigerator according to claim 7. 9. The third control means, when the doors of the refrigerating room, the freezing room, etc. are opened and closed between immediately before the start of defrosting and when the defrosting is completed, and when the accumulated accumulated time is more than a predetermined time, the third control means is intermittently operated. The refrigerator according to claim 7, wherein the refrigerator is stopped. 10. The third control means, when the refrigerating compartment sensor for detecting the temperature of the refrigerating compartment detects a refrigerating ON temperature or higher during intermittent operation, or the freezing compartment sensor for detecting the temperature of the freezing compartment turns on freezing. 8. The refrigerator according to claim 7, wherein the intermittent operation is canceled when the temperature or higher is detected. 11. The third control means, when a forced cooling operation command for freezing cooling or refrigerating cooling is input,
The refrigerator according to claim 7, wherein the intermittent operation is canceled. 12. A refrigerant by connecting a compressor, a condenser, a refrigerating expansion mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a freezing restricting mechanism, and a freezing evaporator corresponding to a freezing compartment. Refrigerant mode that configures the flow path and switches the refrigerant flow path by the valve mechanism to flow the refrigerant to the refrigeration evaporator at least via the refrigeration throttle mechanism, and the refrigerant only to the freezing evaporator via the refrigeration throttle mechanism. A cooling fan that blows the air cooled by the freezing evaporator to the freezer compartment and a temperature setting that cools the freezing evaporator and the freezing fan However, in a refrigerator equipped with a switching chamber that can control from the freezing temperature zone to the refrigerating temperature zone, if the temperature setting of the switching chamber is set to the freezing temperature zone, the freezing fan is operated continuously even while cooling the refrigerating room. Equipped with a fourth control means A refrigerator characterized by having. 13. The refrigerator according to claim 12, wherein the fourth control means stops the refrigeration fan when the compressor is stopped. 14. When the compressor is a DC inverter compressor, the fourth control means continuously rotates the refrigeration fan at a rotation speed corresponding to the operating frequency of the compressor.
Refrigerator described.