JP2000220939A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the operation rate of a refrigerator during start operation of a compressor while preventing inner temperature rise. SOLUTION: Refrigeration mode (R cooling) is started first normally even if a freezing chamber sensor detects an ON temperature or refrigeration mode is started first when the freezing chamber sensor detects an ON temperature. If the freezing chamber sensor detects an ON temperature or below when a transition is made from refrigeration mode to freezing mode (F cooling), the freezing mode is sustained until OFF temperature is reached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having two evaporators.

[0002]

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

[0003] In order to efficiently cool these two evaporators with the refrigerant sent from one compressor (compressor), a three-way valve is disposed in the middle of the refrigerant flow path, and the three-way valve is switched. Refrigerant is a refrigeration evaporator (hereinafter, referred to as
It is called R Eva. ) Or a refrigerating evaporator (hereinafter referred to as F eva).

[0004] Conventionally, a DC inverter type compressor has been used. In a refrigerator equipped with a DC compressor, when the room temperature is medium to high, the cooling capacity can be varied by changing the frequency of the compressor. Because of this, it was not necessary to set the startup conditions.

[0005] That is, if it is a DC compressor,
The cooling capacity can be varied by finely adjusting the amount of the refrigerant by changing the inverter frequency, so that the evaporation temperature of the F-eva or R-eva can be adjusted.

[0006] Therefore, if the evaporation temperature of the R-eva, F-eva, etc. is too low, it is sufficient to adjust the frequency of the inverter to increase the evaporation temperature. To increase the evaporation temperature (evaporation 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 the time of starting.

[0007]

In addition to the DC compressor, there is also an AC compressor, and this AC compressor has an advantage that the cost is lower than that of the DC compressor. However, in a refrigerator equipped with an AC compressor, unlike a DC compressor, the AC compressor cannot be adjusted by frequency.
It is necessary to stop the AC compressor from time to time because the evaporation temperature becomes too low. Therefore, in a refrigerator equipped with an AC compressor, it is necessary to set conditions at the time of starting.

However, in a refrigerator equipped with an AC compressor, since the refrigerator enters an OFF state during an operation cycle, the refrigerator compartment, the vegetable compartment, or the like is cooled at startup (hereinafter, referred to as R cooling) or the freezer compartment is cooled (hereinafter, referred to as R cooling). It is called F cooling.)
If the selection of whether to perform is performed only by the ON / OFF temperature of the sensor, the following problem occurs.

[0009] The first problem is that the operation rate increases. That is, the operation is performed until the OFF temperature is reached, so that the operation rate is increased.

A second problem is that the temperature inside the refrigerator compartment abnormally rises (the details of this problem will be described in detail in embodiments).

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a refrigerator which aims to reduce the operating rate at the time of starting the compressor and to prevent a rise in the temperature inside the refrigerator.

[0012]

According to the present invention, a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restricting mechanism, and a refrigerating compartment are provided. Connected to the refrigerating evaporator to form a refrigerant flow path,
A refrigeration mode in which the refrigerant flow path is switched by the valve mechanism to flow the refrigerant to the refrigeration evaporator through at least the refrigeration throttle mechanism, and a refrigeration mode in which the refrigerant flows only to the refrigeration evaporator via the refrigeration throttle mechanism. In a refrigerator provided with a refrigerator compartment sensor that detects the temperature of the refrigerator compartment and a refrigerator compartment sensor that performs the alternate cooling operation that can be realized alternately, and the refrigerator compartment sensor that detects the temperature of the refrigerator compartment, the detected temperature of the refrigerator compartment sensor becomes the refrigerator ON temperature. When the temperature reaches the refrigeration mode, the refrigeration mode is performed first when the temperature detected by the freezer compartment sensor reaches the freezing ON temperature.
Refrigeration priority cooling control for shifting to the freezing mode thereafter, and when the freezing room sensor is at or below the freezing ON temperature when shifting from the refrigeration mode to the freezing mode, the freezing mode is turned off for freezing.
A refrigerator comprising: first control means for performing refrigeration / cooling control that continues until the temperature becomes lower than the temperature.

The invention according to claim 2 is the refrigerator according to claim 1, wherein the first control means performs the refrigeration priority cooling control only when the room temperature detected by the outside air temperature sensor is equal to or higher than a predetermined temperature.

The invention according to claim 3 is the refrigerator according to claim 1, wherein the first control means performs the refrigeration priority cooling control when the temperature detected by the refrigerator compartment sensor is higher than a predetermined temperature.

According to a fourth aspect of the present invention, there is provided a compressor, a condenser, a refrigerating restrictor, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restrictor, and a refrigerating evaporator corresponding to a refrigerating compartment. To form a refrigerant flow path, switch the refrigerant flow path by a valve mechanism, and at least use a refrigeration mode in which refrigerant flows to a refrigeration evaporator through a refrigeration expansion mechanism, and a refrigeration mode through a refrigeration expansion mechanism. In a refrigerator provided with a refrigerator compartment sensor for detecting the temperature of the refrigerator compartment and a refrigerator compartment sensor for detecting the temperature of the refrigerator compartment, performing an alternate cooling operation capable of alternately realizing the freezing mode in which the refrigerant flows only into the evaporator. When the temperature detected by the freezer compartment sensor becomes equal to or lower than the freezing OFF temperature during the freezing mode, a second control means for stopping the compressor if the detected temperature of the refrigerator compartment sensor is equal to or lower than the refrigeration ON temperature is provided. You It is a refrigerator.

According to a fifth aspect of the present invention, when the temperature detected by the refrigeration compartment sensor is lower than the refrigeration OFF temperature during the refrigeration mode, the temperature detected by the freezing compartment sensor is set to the refrigeration OFF.
The refrigerator according to claim 4, wherein the compressor is stopped if the temperature is lower than the temperature.

According to a sixth aspect of the present invention, there is provided a refrigerator having a switching room capable of setting a temperature in a refrigerator from a freezing temperature range to a refrigeration temperature range, and a switching room sensor for detecting the temperature of the switching room. 5. The refrigerator according to claim 4, wherein the switching room is used in a refrigeration mode, and the compressor is stopped when the switching room sensor is at or below the freezing ON temperature.

A seventh aspect of the present invention provides a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating room, a refrigerating restrictor mechanism, and a refrigerating evaporator corresponding to a refrigerating room. To form a refrigerant flow path, switch the refrigerant flow path by a valve mechanism, and at least use a refrigeration mode in which refrigerant flows to a refrigeration evaporator through a refrigeration expansion mechanism, and a refrigeration mode through a refrigeration expansion mechanism. A refrigerator that performs an alternate cooling operation that can alternately realize a refrigeration mode in which a refrigerant flows only into an evaporator, and a refrigeration evaporator and a refrigeration evaporator that are provided with defrost heaters, respectively, and that can perform a defrost operation. In the case where there is no door opening and closing from the start to the end of the immediately preceding defrost, the return operation after the defrost is performed in an intermittent operation in a time-divided manner for a specific time, and during this intermittent operation, the freezing room and the refrigerator compartment are alternately operated. And third control means for cooling. A refrigerator, characterized in that there.

In the invention according to claim 8, the third control means performs the intermittent operation when the door of the refrigerator compartment, the freezer compartment, etc. has been opened and closed 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.

According to a ninth aspect of the present invention, the third control means opens and closes the doors of the refrigerating compartment, the freezing compartment, etc. between the start and the end of the immediately preceding defrosting, and the accumulated open time is longer than a predetermined time. 8. In the case, the intermittent operation is released.
A refrigerator as described.

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

The invention according to claim 11 is the refrigerator according to claim 7, wherein the third control means cancels the intermittent operation when a forced cooling operation command for refrigeration cooling or refrigeration cooling is input.

According to a twelfth aspect of the present invention, there is provided a compressor,
A condenser, a refrigerating restrictor, a refrigerating evaporator corresponding to the refrigerating compartment, a refrigerating restrictor, and a refrigerating evaporator corresponding to the refrigerating compartment are connected to form a refrigerant flow path; Refrigeration mode in which refrigerant is switched to a refrigeration evaporator via at least a refrigeration throttle mechanism by switching the refrigerant flow path, and a refrigeration mode in which refrigerant flows only to the refrigeration evaporator only via a refrigeration throttle mechanism. A refrigeration fan that performs an alternate cooling operation that can be realized and sends air cooled by a refrigeration evaporator to a freezing room,
In a refrigerator having a switching room in which the temperature setting for cooling with a refrigerating evaporator and a freezing fan can be controlled from a freezing temperature range to a refrigeration temperature range, the temperature setting of the switching room is set to the freezing temperature range. In this case, the refrigerator is provided with fourth control means for continuously operating the freezing fan even during the cooling of the refrigerator compartment.

The invention according to claim 13 is the refrigerator according to claim 12, wherein the fourth control means stops the refrigerating fan when the compressor is stopped.

According to a fourteenth aspect of the present invention, the compressor
The C-inverter compressor, wherein the fourth control means continuously rotates the refrigeration fan at a rotation speed corresponding to the operating frequency of the compressor.
2. The refrigerator according to 2.

According to the refrigerator of the first aspect, by performing the cooling before the R cooling, the operation rate can be reduced and the temperature inside the refrigerator can be prevented from rising.

According to the refrigerator of the second aspect, since the above control is not performed at a low room temperature, it is possible to prevent the temperature of the refrigerator from being lowered more than necessary.

According to the refrigerator of the third aspect, when the temperature in the refrigerator compartment is lower than a certain temperature at which there is no concern about an increase in the refrigerator compartment temperature, the cooling is started from the F-cooling. Can be.

According to the refrigerator of the fourth to sixth aspects, alternate cooling can be performed in a stable cycle including the stoppage of the compressor, and unnecessary operation can be reduced.

According to the refrigerator of the present invention, an increase in power consumption can be suppressed by performing a return operation after defrosting by an intermittent operation divided in time.

According to the refrigerators of claims 8 to 11,
Since the intermittent operation is canceled in a certain case, the temperature in the refrigerator compartment or the freezer compartment can be quickly reduced, and the food is not damaged.

According to the refrigerators of the twelfth to fourteenth aspects, it is possible to improve the difference in the temperature distribution in the storage between the switching room and the freezing room, and as a result, it is possible to reduce the operation rate and suppress the increase in power consumption. Can be.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigerator 10 according to one 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 longitudinal sectional view of the refrigerator 10 as viewed from the side, and also serves as an explanation of the electric system. FIG. 13 is an explanatory diagram of a refrigeration cycle of the refrigerator 10.

First, a description will be given based on FIG.

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

At the bottom of the rear surface of the freezing room 18, an AC type compressor, that is, a machine room 2 in which a compressor 20 is disposed.
2 are provided. A freezer evaporator (hereinafter referred to as F-eva) 24 is disposed behind the freezer 18.
Above the evaporator 24, a freezing room fan (hereinafter, referred to as an F fan) 26 that blows cool air generated by the F evaporator 24 to the freezing room 18 is provided. Below the Feva 24, F
A defrost heater (hereinafter, referred to as an F defrost heater) 28 for performing defrosting of 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 freezer compartment temperature sensor (hereinafter referred to as an F sensor) 3 for measuring the temperature inside the refrigerator is provided.
2 are provided.

At the back of the vegetable compartment 16, a refrigerator evaporator (hereinafter referred to as R-eva) 34 is provided.
Above 4, fan for refrigerator (hereinafter referred to as R fan)
36 is provided, and an R-eva sensor 38 for detecting the temperature of the R-eva 34 is provided. Below the Reva 34, R
A defrost heater (hereinafter, referred to as an R defrost heater) 40 for performing defrosting of the evaporator 34 is provided.

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

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

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

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

The cool air cooled by the Feva 24 is
The air is blown by the fan 26 and circulates through the freezer 18. The cool air blown by the F fan 26 flows into the switching chamber 19 via the damper device 94. And switching room 1
9 is controlled by opening and closing the damper device 94. Further, the cool air cooled by the R-eva 34 is:
The air is sent to the vegetable room 16 and the refrigerator room 14 by the R fan 36 and circulated.

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 two branches of the refrigerant flow path from the three-way valve 68 is connected to the R-eva 34 via a refrigerator-tube capillary tube (hereinafter referred to as an R-capillary tube) 50. Also,
The other refrigerant flow path divided from the three-way valve 68 is a capillary tube for a freezing room (hereinafter, referred to as an F capillary tube).
52. Then, the refrigerant flow paths of the F capillary tube 52 and the R-eva 34 become one and the F-eva 2
4 and further connected to the compressor 20.

The operation of the refrigerator 10 will be described.

1. Alternate Cooling Operation (1) Refrigeration Mode (R Cooling) The three-way valve 68 is switched so that the refrigerant flows to the R eva 34 and the F eva 24. When the R fan 36 and the F fan 26 are operated, the cooled air is
It is sent to the refrigerator compartment 14, the vegetable compartment 16, and the freezer compartment 18, and these compartments are cooled. Hereinafter, this state is referred to as a refrigeration 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 eva 24. And F
Only the fan 26 is operated. In this state, Fever 2
The cool air cooled by 4 is sent to only the freezer compartment 18 by the F fan 26, and the temperature inside the refrigerator decreases. Then, no cool air is sent into the refrigerator compartment 14. Hereinafter, this state is referred to as a freezing mode.

(3) Alternating Cooling Operation Alternating between the freezing mode and the refrigeration mode is referred to as an alternating cooling operation.

2. FIG. 3 is a diagram showing a control operation when the compressor 20 is started. FIG. 3A shows a conventional control, that is, FIG. 3A shows a conventional control, that is, the detection temperature of the F sensor 32 is an ON temperature (F cooling is performed). temperature)
FIG. 3B shows a case where F cooling is performed when
Shows the control operation of the present invention.

Here, the problem of this case will be described with reference to the operation of FIG. That is, in the refrigerator equipped with the AC compressor, the operation cycle is turned off except at the time of overload. When the F sensor 32 reaches the ON temperature and the compressor 20 starts, if the F cooling is performed as it is, the process does not shift to the R cooling until the F cooling is completed. At times, the temperature detected by the R sensor 42 becomes 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 long 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 the 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 at which R cooling is performed) at time t1, R cooling is not performed until time t2, and therefore, the refrigerator compartment 14 (hereinafter, the vegetable compartment 16) is not cooled.
) Abnormally rises above the ON temperature. Then, at time t2, when the temperature of the F-cooling reaches the OFF temperature (temperature at which the F-cooling is stopped), the R sensor 42 performs the R-cooling for the ON temperature or higher.

Then, at time t3, the R sensor 42 is turned off.
When the temperature reaches the temperature (the temperature at which the R cooling is stopped), the inside temperature of the freezing compartment 18 rises, so that the F cooling is performed. When the F sensor 32 becomes the OFF temperature, the F cooling is stopped.
At this time, the compressor 20 is turned off (stopped) because the R sensor 42 is also at or below the ON temperature. Therefore, F
If cooling is performed first, F cooling → R cooling → F cooling → stop,
The operation cycle becomes longer, and the operation rate increases.

On the other hand, if the R cooling is performed first, the above-mentioned rise in the temperature of the refrigerator compartment 14 can be prevented. On the contrary, there is a concern that the temperature of the freezing compartment 18 rises. There is no problem because it is short. In addition, by performing 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 when the F sensor 32 reaches the ON temperature at time t1, R cooling is performed without performing F cooling and the R sensor 4
F cooling is performed until 2 reaches the OFF temperature. On the other hand, F
Since the temperature of the sensor 32 is higher than the ON temperature, the time t2
To perform F cooling. Then, F cooling is performed until the F sensor 32 reaches the OFF temperature. At time t3, since the R sensor 42 is lower than the ON temperature, the compressor 20 is turned off until the next start condition after time t3.

Incidentally, in FIG. 3B, from R cooling to F
At the time of cooling, the temperature detected by the F sensor 32 is higher than the ON temperature. Even when the temperature detected by the F sensor 32 is lower than the ON temperature, the F cooling is performed until the temperature becomes lower than the OFF temperature. I have. Thereby, the freezer compartment 18
Can be efficiently cooled, and a rise in the temperature of the freezing compartment 18 can be prevented.

In this way, as shown in FIG. 3 (a), if the F sensor 32 reaches the ON temperature and performs F-cooling first, the temperature rise of the refrigerator compartment 14 becomes slow, so that T1
> T1 '. Then, the R cooling time also becomes longer, and R1> R1 '(formula). When R1> R1 ', the F temperature rise during the R cooling time (the temperature rise in the freezer 18) becomes T2>T2', and as a result, F1 +
F2> F1 '(expression).

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

FIG. 4 is a flowchart showing the above control operation. That is, the compressor 20
(It is expressed as “comp” in the flowchart.) When F is OFF, as shown in step S1,
The sensor 32 is at the ON temperature or higher, or the R sensor 4
If 2 is equal to or higher than the ON temperature, the process proceeds to step S2, where the compressor 20 is turned on to perform R cooling (see step S3).

Next, in step S4, the R sensor 4
When the temperature of the sensor 2 becomes lower than the OFF temperature, the cooling changes from the R cooling to the F cooling. Further, when the F sensor 32 becomes lower than the OFF temperature (see step S6), when the R sensor 42 becomes lower than 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 refrigerator compartment 14 from rising abnormally and to reduce the F cooling by one time. As a result, the operation rate can be reduced.

Next, an embodiment in which the above-described control is not performed when the temperature in the room where 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.
Step S8 to step S1 are added to step S7. In step S8, when the room temperature detected by the outside air temperature sensor 90 is low, the process proceeds to step S9, and when the F sensor 32 is higher than the ON temperature, the process proceeds to step S5 to perform F cooling. If the F sensor 32 is lower than the ON temperature in step S9, step S1
0, and if the R sensor 42 is at or above the ON temperature, the process proceeds to step S3 to perform R cooling, and the R sensor 42
If the temperature is equal to or lower than the N temperature, the process returns to step S8.

In this embodiment, at low room temperature where the number of R cooling cycles is small, one cycle of R cooling is performed in two to four operation cycles.
It is not necessary to incorporate the above-mentioned control because it is only cooling. Conversely, if control is taken into consideration even at a low room temperature, R cooling is performed every cycle at a low room temperature.
Causes a drop in temperature. Therefore, when the room temperature is low as in the present embodiment, the above-described control is not performed, so that the temperature of the refrigerator compartment 14 can be prevented from lowering more than necessary.

FIG. 6 shows conditions for performing R cooling first.
9 is a flowchart illustrating an example in which the detection temperature of the R sensor 42 is higher than a preset value (temperature). If the F sensor 32 is higher than the ON temperature in step S11, the process proceeds to step S12 and the compressor 20 is turned on. If the R sensor 42 is lower than the predetermined threshold value (3 ° C.) in step S13, the refrigerator is refrigerated. Since there is no concern about an increase in the internal temperature of the chamber 14, the process proceeds to step S16, and F
Perform cooling. In step S13, the R sensor 42
However, if the temperature is higher than a predetermined threshold value (3 ° C.), there is a possibility that the temperature inside the refrigerator compartment 14 will increase, so R cooling is performed (see step S14). Then, step S15
When the temperature of the R sensor 42 becomes equal to or lower than the OFF temperature, F cooling is performed (step S16).

Next, if the temperature of the F sensor 32 is lower than the OFF temperature, the process proceeds to step S18. If the temperature of the R sensor 42 is lower than the ON temperature, the compressor 20 is stopped.
If the R sensor 42 is higher than the ON temperature, step S1
Returning to No. 4, R cooling is performed.

As described above, in this embodiment, the R-cooling is started only when the temperature of the R sensor 42 is equal to or higher than a certain temperature. When the temperature is lower than the temperature, the control is started from F cooling.

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

3. Control operation at the time of stopping the compressor 20 By the way, the conventional DC inverter type compressor is mounted, has two evaporators (coolers) for refrigeration and freezing, a fan, and a three-way valve (switching valve). In the refrigerator adopting the method of alternating cooling according to (1), the refrigerator is operated by a DC inverter type compressor.

However, the refrigeration and freezing evaporators 24, 3
4. In the refrigerator of the present invention equipped with the AC compressor 20 having the fans 26 and 36 and performing alternate cooling by the three-way valve 68, a control different from that of the DC compressor is required when the compressor 20 is stopped.

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

FIG. 7 shows that the F sensor 32 is turned off during F cooling.
When the temperature falls below the temperature, the compressor 20 is stopped if the R sensor 42 is also below the ON temperature. In FIG. 7, when F-cooling is currently being performed and the F-sensor 32 has become lower than the OFF temperature in step S21, the process proceeds to step S22, where R
It is determined whether the sensor 42 is at or below the ON temperature. If the R sensor 42 is at or below the ON temperature, the process proceeds to step S23 to stop the compressor 20. If the R sensor 42 is at or above the ON temperature in step S22, the process proceeds to step S24 to perform R cooling.

FIG. 8 shows that the R sensor 42 is turned off during R cooling.
FIG. 5 is a flowchart showing a case where the compressor 20 is stopped when the temperature of the F sensor 32 becomes equal to or lower than the OFF temperature when the temperature becomes lower than the temperature. In FIG.
In step S31 during R cooling, the R sensor 42
When the temperature is lower than the FF temperature, the process proceeds to step S32, and it is determined whether the F sensor 32 is lower than the OFF temperature. If the F sensor 32 is at or 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, cool air including humidity can be sent into the refrigerator compartment 14, and the drying of the food can be prevented.
As described above, even when the compressor 20 is stopped, freshness can be preserved, and liquid back can be prevented. Further, by rotating the R fan 36, defrosting of the R eva can also be performed.

FIGS. 9 and 10 show a case in which the switching room 19 is arbitrarily set to a temperature between the freezing temperature range and the refrigeration temperature range, and the switching room 19 is used in the freezing mode. When the switching room sensor 92 for detecting the inside temperature of the switching room 19 is lower than the ON temperature, the flowcharts when the compressor 20 is stopped are shown. FIG. 9 is a flowchart corresponding to FIG. 7 during F cooling, and FIG. 10 is a flowchart corresponding to FIG. 8 during R cooling.

In FIG. 9, when the F sensor 32 is lower than the OFF temperature during the 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, step S41 is performed. Proceeding to S43, the R sensor 42 is compared with the ON temperature. R from ON temperature
If the sensor 42 is low, the flow shifts to step S44 to stop the compressor 20. Step S43
If the R sensor 42 is higher than the ON temperature in step S
The process proceeds to 45, where R cooling is performed.

In FIG. 10, if the R sensor 42 is at or below the OFF temperature during R cooling, the flow proceeds to step S52, and if the F sensor 32 is lower than the OFF temperature, the flow proceeds to step S53. If the switch chamber 19 sensor is lower than the ON temperature in step S53, the process proceeds to step S54 to stop the compressor 20. 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, in the present embodiment, a refrigerator having two evaporators 24 and 34 for refrigeration and freezing, and even when the compressor 20 is of the AC type, a stable operation including the stop of the compressor 20 is achieved. Alternate cooling can be performed in a cycle, and unnecessary operation can be reduced.

4. Defrosting Operation In the refrigerator 10, when the defrosting operation is performed, the Feva 24 and the Reva 34 are simultaneously defrosted by the defrost heaters 28 and 40 from the structure of the refrigerating cycle shown in FIG. In some cases, only the evaporator 24 is defrosted by the F defrost heater 28.

5. Control operation at the time of defrost recovery immediately after defrost operation By the way, the refrigerant circuit of a refrigerator equipped with a 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. By these refrigeration cycles, the freezer 1
In the case of a refrigerator capable of cooling only the refrigerator 8 or cooling the refrigerator compartment 14 and the freezer compartment 18, when the inside of the refrigerator is lightly loaded, the return operation after defrosting is suppressed by reducing the power consumption by varying the capacity of the compressor (variable frequency). It has become.

However, when the compressor 20 is of the AC type as in the present invention, some contrivance 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 intermittent return operation after defrosting in a time-sharing manner,
This is to suppress an increase in power consumption.

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

FIG. 13 shows a control method according to the present invention. In the case where the AC compressor 20 is used, if the door is not opened or closed from the previous defrost to the end and the load is light, return after defrosting is performed. The operation is performed intermittently in a time division manner, during which the freezing compartment 18 and the refrigerating compartment 14 are alternately cooled.

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 after that, alternate cooling of R cooling and F cooling is performed. The time of the return operation after the defrosting is, for example, 2 hours. After the control time of 2 hours, normal control, that is, alternate cooling is performed according to the temperature in the refrigerator. The combined cooling time of the R cooling and the 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 return operation after defrosting intermittently in a time division manner, it is possible to suppress an increase in power consumption.

When the doors of the refrigerator compartment 14 and the freezer compartment 18 are frequently opened and closed, for example, once or more, the load is determined to be large during the period from the start to the end of the immediately preceding defrosting. Intermittent operation is not performed.

Thus, the internal temperature of the refrigerator compartment 14 or the freezer compartment 18 can be quickly lowered.

When the doors of the refrigerating compartment 14 and the freezing compartment 18 are opened and closed during the period from the start to the end of the immediately preceding defrosting, and 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 cooling is prioritized so that the intermittent operation of the compressor 20 is not performed.

Thus, the temperatures in the refrigerator compartment 14 and the freezer compartment 18 can be quickly lowered.

Further, when the R sensor 42 in the refrigerator compartment 14 or the F sensor 32 in the freezer compartment 18 detects the ON temperature or higher during the intermittent operation, the cooling operation is prioritized and the intermittent operation of the compressor 20 is released. I am trying to do it.

Thus, the temperatures in the refrigerator compartment 14 and the freezer compartment 18 can be quickly reduced.

Further, when a forced cooling operation mode such as ice making, freezing, refrigeration or the like is entered, the intermittent operation of the compressor 20 is released.

Thus, a forced cooling operation such as ice making, freezing, or refrigeration can be performed, and the operation can be performed without impairing the functions of so-called one-time ice making, one-time freezing, and one-time refrigeration.

6. Control operation of the switching room 19 By the way, when the temperature setting of the switching room 19 is set to the freezing temperature zone, the load temperature of the switching room 19 and the freezing room 18
Temperature difference occurs between the load temperature and the load temperature. As a result, in order to lower the load temperature of the switching chamber 19, the operation rate (or DC
In the case of an inverter-type compressor, the operating frequency is increased, which causes a problem of increasing power consumption.

Therefore, in this embodiment, when the temperature setting of the switching room 19 is set to the freezing temperature zone, the difference in the temperature distribution in the inside of the switching room 19 and the freezing room 18 is improved, and as a result, the operating rate is reduced. , 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 set by setting the temperature setting of the switching room 19 capable of controlling the temperature from the freezing temperature zone to the refrigeration temperature zone to the freezing temperature zone. In such a case, the freezer compartment fan 26 is controlled so as to be continuously operated even while the refrigerator compartment 14 is being cooled. The continuous operation of the freezing room fan 26 prevents the inside temperatures of the switching room 19 and the freezing room 18 from rising, and can improve the difference in the inside temperature distribution between the switching room 19 and the freezing room 18. As a result, the operation rate can be reduced as a result, and an increase in power consumption can be suppressed.

When the compressor 20 is stopped, the continuous rotation of the freezing room fan 26 is also stopped. Also in this case, the difference in the temperature distribution in the storage between the switching room 19 and the freezing room 18 can be improved, and the operation of the freezing room fan 26 is stopped, so that an increase in power consumption can be suppressed.

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

(2) In the case of a DC inverter compressor, continuous rotation is performed at the rotation speed of the freezing room 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 room fan 26 is set such that the temperature setting of the switching room 19 capable of controlling the temperature from the freezing temperature zone to the refrigeration temperature zone is set to the freezing temperature zone. In such a case, the freezer compartment fan 26 is controlled so as to be continuously operated even while the refrigerator compartment 14 is being cooled. In this case, the rotation speed of the freezing room fan 26 is controlled to be increased in direct proportion to the operating frequency of the DC inverter compressor. This freezer fan 26
By the continuous operation of the above, it is possible to prevent an increase in the internal temperature of the switching room 19 and the freezing room 18, and to improve a difference in the internal temperature distribution of the switching room 19 and the freezing room 18. As a result, the operation rate can be reduced as a result, and an increase in power consumption can be suppressed.

[0101]

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

Also, when the F sensor goes below the OFF temperature during the F cooling, the compressor is stopped if the R sensor goes below the ON temperature. Can be reduced.

Further, by performing the return operation after defrosting in an intermittent operation divided in time, an increase in power consumption can be suppressed.

When the temperature setting of the switching room is set to the freezing temperature zone, the freezing fan is continuously operated even during the cooling of the refrigerator, so that the difference in the temperature distribution between the switching room and the freezing room is improved. And, as a result, the driving rate can be reduced,
An increase in power consumption can be suppressed.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of the refrigerator of the present embodiment.

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

FIG. 4 is a flowchart showing a control operation when the compressor is started.

FIG. 5 is a flowchart showing a control operation when the compressor is started.

FIG. 6 is a flowchart showing a control operation when the compressor is started.

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 immediately after the defrosting operation in the DC inverter compressor.

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Refrigerator 20 Compressor 24 Feva 26 Freezer compartment fan 28 Defrost heater 30 Feva sensor 32 Fsensor 34 Reva 38 Revasensor 44 Control device 68 Three-way valve

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihiro Yoshioka 1-6 Ota Toshiba-cho, Ibaraki-shi, Osaka Inside the Toshiba Osaka Plant Co., Ltd. (72) Yoshiro Naemura 1st Ota-Toshiba-cho, Ibaraki-shi, Osaka No. 6 F-term in Toshiba Osaka Plant (reference) 3L045 AA02 AA03 BA01 CA02 CA03 DA02 EA01 GA07 HA02 HA08 JA15 LA05 LA06 LA09 LA14 MA02 MA05 NA22

Claims (14)

[Claims] A refrigerant is connected to a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restricting mechanism, and a refrigerating evaporator corresponding to a refrigerating compartment. A cooling mode in which the flow path is formed, the refrigerant flow path is switched by a valve mechanism, and the refrigerant flows at least through the refrigeration throttle mechanism to the refrigeration evaporator, and the refrigerant flows only into the refrigeration evaporator through the refrigeration throttle mechanism. In the refrigerator equipped with a refrigerator sensor for detecting the temperature of the refrigerator, and a refrigerator sensor for detecting the temperature of the refrigerator, an alternate cooling operation capable of alternately realizing the refrigerator mode in which When the temperature reaches the refrigeration ON temperature, the refrigeration mode is performed, and when the temperature detected by the freezing compartment sensor reaches the refrigeration ON temperature, the refrigeration mode is performed first, and then the refrigerator mode is shifted to the refrigeration mode. Refrigerated When the freezer compartment sensor when going from over de in a refrigeration mode following freezing ON temperature, the refrigeration mode refrigeration O
A refrigerator comprising first control means for performing refrigeration / cooling control for maintaining the temperature at or below the FF temperature. 2. The refrigerator according to claim 1, wherein the first control means performs refrigeration priority cooling control only when the room temperature detected by the outside air temperature sensor is equal to or higher than a predetermined temperature. 3. The refrigerator according to claim 1, wherein the first control means performs the refrigerator-first priority cooling control when the temperature detected by the refrigerator compartment sensor is higher than a predetermined temperature. 4. A refrigerant by connecting a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restricting mechanism, and a refrigerating evaporator corresponding to a refrigerating compartment. A cooling mode in which the flow path is formed, the refrigerant flow path is switched by a valve mechanism, and the refrigerant flows at least through the refrigeration throttle mechanism to the refrigeration evaporator, and the refrigerant flows only into the refrigeration evaporator through the refrigeration throttle mechanism. In the refrigerator equipped with a refrigerator sensor that detects the temperature of the refrigerator, and a refrigerator sensor that detects the temperature of the refrigerator, an alternate cooling operation that can alternately realize When the temperature detected by the room sensor falls below the freezing OFF temperature, the temperature detected by the refrigerator
A refrigerator comprising a second control means for stopping the compressor if the temperature is equal to or lower than the N temperature. 5. The refrigerator according to claim 2, wherein the detected temperature of the freezing compartment sensor is lower than the freezing temperature when the detected temperature of the refrigerating compartment sensor becomes equal to or lower than the refrigeration OFF temperature during the refrigerating mode.
The refrigerator according to claim 4, wherein the compressor is stopped when the temperature is equal to or lower than the FF temperature. 6. A refrigerator provided with a switching room capable of setting a temperature in a refrigerator from a freezing temperature zone to a refrigeration temperature zone, and a switching room sensor for detecting a temperature of the switching room. 5. The refrigerator according to claim 4, wherein the refrigerator is used in a refrigerating mode, and the compressor is stopped when the temperature of the switching room sensor is lower than a refrigerating ON temperature. 7. A refrigerant connecting a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restricting mechanism, and a refrigerating evaporator corresponding to a refrigerating compartment. A cooling mode in which the flow path is formed, the refrigerant flow path is switched by a valve mechanism, and the refrigerant flows at least through the refrigeration throttle mechanism to the refrigeration evaporator, and the refrigerant flows only into the refrigeration evaporator through the refrigeration throttle mechanism. And a refrigerating mode for alternately performing a cooling mode, in which a refrigerating mode is provided. Alternately, a refrigerating evaporator and a refrigerating evaporator are provided with defrosting heaters, respectively. If there is no door opening and closing from the start to the end of the frost,
A refrigerator comprising: a third control unit that performs a return operation after defrosting in an intermittent operation for a specific time in a time division manner and alternately cools a freezing room and a refrigerator room during the intermittent operation. 8. The intermittent operation is canceled when at least one opening / closing of a door of a refrigerator compartment, a freezing compartment, or the like has been performed between the start and the end of the immediately preceding defrosting. The refrigerator according to claim 7, wherein 9. The third control means intermittently opens and closes the doors of the refrigerating compartment, the freezing compartment and the like during the period from the start to the end of the immediately preceding defrosting, and when the accumulated open time is longer than a predetermined time. The refrigerator according to claim 7, wherein the operation is canceled. 10. A refrigerating compartment sensor for detecting the temperature of the refrigerating compartment during the intermittent operation when the refrigerating compartment sensor detects the temperature of the refrigerating compartment or higher, or a refrigerating compartment sensor for detecting the temperature of the refrigerating compartment during the intermittent operation. 8. The refrigerator according to claim 7, wherein the intermittent operation is canceled when the temperature is detected. 11. The third control means, when a forced cooling operation command for refrigeration cooling or refrigeration cooling is input,
The refrigerator according to claim 7, wherein the intermittent operation is canceled. 12. A refrigerant connecting a compressor, a condenser, a refrigerating throttle mechanism, a refrigerating evaporator corresponding to a refrigerating compartment, a refrigerating restricting mechanism, and a refrigerating evaporator corresponding to a refrigerating compartment. A cooling mode in which the flow path is formed, the refrigerant flow path is switched by a valve mechanism, and the refrigerant flows at least to the refrigerating evaporator via the refrigerating restricting mechanism, and the refrigerant flows only to the refrigerating evaporator via the refrigerating restricting mechanism. Refrigeration fan that performs alternate cooling operation that can realize alternately with the refrigeration mode in which cooling air flows, and sends air cooled by the refrigeration evaporator to the freezing room, and temperature setting for cooling with the refrigeration evaporator and the refrigeration fan However, in a refrigerator having a switching room that can be controlled from a freezing temperature range to a refrigeration temperature range, when the temperature setting of the switching room is set to the freezing temperature range, the refrigeration fan is continuously operated even during the cooling of the refrigerator compartment. Equipped with fourth control means Refrigerator. 13. The refrigerator according to claim 12, wherein the fourth control means stops the refrigerating fan when the compressor is stopped. 14. The refrigerator according to claim 12, wherein when the compressor is a DC inverter compressor, the fourth control means continuously rotates the refrigerating fan at a rotation speed corresponding to the operating frequency of the compressor.