JP3819693B2 - Refrigerator operation control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a refrigerating room and a freezing room, the refrigerating room cooler and the refrigerating room cool air circulation blower, and the freezing room cooler and the freezing room cold air circulation respectively for the refrigerating room and the freezing room. The present invention relates to a refrigerator in which a blower is provided, and the refrigerant that is compressed by the compressor and flows through the condenser to the both coolers is switched and controlled by the refrigerant flow switching device.
[0002]
[Prior art]
Prior art has a refrigerator compartment and a freezer compartment, and a refrigerator for the refrigerator compartment and a cold air circulation fan for the refrigerator compartment dedicated to the refrigerator compartment and the freezer compartment, a cooler for the refrigerator compartment, and a cold air circulation for the freezer compartment, respectively. The cooling medium provided with a blower and compressed by the compressor and passed through the condenser flows from the refrigerating room cooler to the freezing room cooler, and the refrigerating room or the refrigerating room cooler decreases to a predetermined temperature by cooling. The refrigerant flow path to the refrigerator compartment cooler is closed and the refrigerant flow switching device is controlled so that the refrigerant flows to the freezer compartment cooler, and the freezer compartment or the freezer compartment cooler is There is a refrigerator that stops the compressor and the blowers when cooled to the lower limit temperature, and when the temperature of the refrigerator compartment decreases to a predetermined lower limit temperature, the refrigerant flow switching device supplies the refrigerant to the refrigerator for the refrigerator compartment. Stop the flow Flowing only to the freezing compartment cooler Te adopts a means for humidifying the refrigerating chamber refrigerator compartment cold air circulating blower in operation for several minutes by melting the frost refrigerating compartment cooler.
[0003]
In this prior art, the refrigerant that has passed through the condenser flows from the refrigerating room cooler to the freezing room cooler, and when the freezing room or the freezing room cooler is cooled to a predetermined lower limit temperature, the compression is performed. Stop the machine and both fans. When the freezer or the cooler for the freezer rises to a predetermined upper limit temperature, the compressor and the cold air circulating blower for the freezer resume operation. In this case, normally, since the refrigerator compartment or the refrigerator refrigerator is also raised to a predetermined upper limit temperature, the refrigerant is switched from the refrigerator refrigerator to the refrigerator refrigerator by the refrigerant flow switching device. The refrigerant passage is formed so as to flow, and the cold air circulation blower for the refrigerator compartment is also operated.
[0004]
[Problems to be solved by the invention]
Thus, in a state where the freezer compartment and the refrigerator compartment have risen above the predetermined upper limit temperature, the compressor and the blower are operated to circulate cold air between the freezer compartment and the refrigerator compartment, It is necessary to set a so-called freezing / refrigeration operation mode in which the cooling is performed. In this freezing / refrigeration operation mode, when the operation of the compressor starts, the temperature of the refrigerator for the refrigerator compartment rises to about 0 ° C., and at the same time as the operation of the compressor, When the cold air circulation blower is operated, the high-temperature refrigerant in the refrigerator for the refrigerator compartment flows into the refrigerator for the freezer compartment cooled to a temperature below zero, and the temperature of the refrigerator for the refrigerator compartment rises. For this reason, there is an adverse effect that the temperature of the freezer compartment rises due to the operation of the cold air circulation blower for the freezer compartment.
[0005]
The present invention solves such a problem. Further, according to the present invention, when the temperature of the refrigerator compartment decreases to a predetermined lower limit temperature, the refrigerant flow switching device stops the flow of the refrigerant to the refrigerator for the refrigerator compartment and flows only to the refrigerator for the refrigerator compartment, The control system applicable to the type which operates the cold air circulation fan for humidification, and humidifies a refrigerator compartment by melting | fusing the frost of the refrigerator for refrigerator compartments is provided.
[0006]
[0007]
[0008]
[0009]
[0010]
[0011]
[Means for Solving the Problems]
The present invention provides a predetermined time effective for suppressing adverse effects on the freezer cooler due to a high temperature of the freezer cooler at the start of the freezer refrigerating operation mode from the start of operation of the compressor. When the cold air circulation blower starts with a delay, and is controlled to be switched by the refrigerant flow switching device, the cold air circulation blower for the cold room is operated for a predetermined time to melt the frost attached to the cooler for the cold room. Adopting technical means to make the refrigerating room a humidifying operation mode to make the humidified state, and to rotate the cooling air circulation fan for the freezing room at a higher speed in the period after the humidifying operation mode than in the period until the end of the humidifying operation mode .
[0012]
[0013]
In addition, the present invention employs technical means for increasing the number of revolutions of the cold air circulating blower for the freezer compartment with a delay from the switching time from the freezing / refrigeration operation mode to the freezing operation mode.
[0014]
Further, the present invention provides a method in which when the refrigeration operation mode is controlled to be switched from the refrigeration operation mode to the refrigeration operation mode, the refrigeration chamber cold air circulation blower is operated for a predetermined time to melt frost attached to the refrigeration chamber cooler. Technical means was adopted that performs the delay during the humidifying operation mode in which the refrigerating chamber is in a humidified state, and increases the number of revolutions of the cold air circulating blower for the freezing chamber at the end of the humidifying operation mode.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the refrigerator of the present invention will be described. 1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of the refrigerator, FIG. 2 is a longitudinal side view of the refrigerator of FIG. 1, FIG. 3 is a refrigerant circuit diagram of the refrigerator, and FIG. Is a control configuration diagram of the refrigerator, and FIG. 5 is a time chart.
[0016]
1 to 4, reference numeral 1 denotes a refrigerator body, which has a heat insulating structure in which a foam heat insulating material 4 is filled between an outer box (outer wall plate) 3 and an inner box (inner wall plate) 2. In the refrigerator main body 1, a refrigerator compartment 5, a vegetable compartment 6, and a freezer compartment 7 are partitioned from above, and a refrigerator compartment 5 and a partition plate (partition wall) 8 are provided at the bottom of the refrigerator compartment 5. The freezing room 7 is divided into an upper freezing room 10, a lower freezing room 11, and an ice making room 20. The front opening of the refrigerator compartment 5 is closed at one side of the refrigerator body 1 by a pivotable door 12 that is pivoted laterally by a hinge device and opened and closed. The front opening of the vegetable compartment 6 is closed by a drawer-type door 14 that is drawn forward together with the vegetable container 13 supported so as to be drawn in the front-rear direction by left and right rails or roller devices provided in the vegetable compartment 6. Like the vegetable compartment 6, the upper freezer compartment 10 and the lower freezer compartment 11 are each a drawer-type door that is drawn forward together with containers 15 and 16 supported so as to be able to be drawn in the front-rear direction with respect to the left and right rails provided in the freezer compartment. Closed at 17 and 18.
[0017]
An ice making room 20 is formed on the left side of the upper freezing room 10. An automatic ice making machine 21 is provided in the upper part of the ice making room 20, and an ice storage container 22 is arranged in the lower part. Similarly to the vegetable compartment 6, the ice storage container 22 is supported so that it can be pulled out in the front-rear direction with respect to the left and right rails provided on the left and right walls in the ice making chamber 20, and is a drawer that opens and closes the front opening of the ice making chamber 20. This is a mechanism that is pulled forward together with the expression door 23. A water supply tank for storing ice making water to be supplied to the automatic ice making machine 20 is provided in the refrigerator compartment 5, and the ice making water is supplied from the water supply tank to the ice making tray 24 of the automatic ice making machine 20 through a water supply pipe by a pump.
[0018]
25 is a refrigerant compressor of the refrigeration system, 26 is a condenser of the refrigerant of the refrigeration system, and 27 is an evaporating dish for evaporating defrost water of a cooler described later by the heat of the condenser 26. Reference numerals 28 and 29 are refrigerant coolers (evaporators) of the refrigeration system, 28 is a cooler for the freezer compartment 7, and 29 is a cooler for the refrigerator compartment 5. 30 is a cold air circulation blower for the freezer compartment 7, and 31 is a cold air circulation blower for the refrigerator compartment 5. The cold air cooled by the cooler 28 for the freezer compartment 7 is circulated back to the cooler 28 via the ice making chamber 20, the upper freezer compartment 10 and the lower freezer compartment 11 by the blower 30. The cold air cooled by the cooler 29 for the refrigerator compartment 5 is circulated back to the cooler 28 via the refrigerator compartment 5, the specific low temperature compartment 9 and the vegetable compartment 6 by the blower 31. The specific low temperature chamber 9 is provided with a container 50 supported so that it can be pulled out in the front-rear direction with respect to the left and right rails provided in the specific low temperature chamber 9.
[0019]
32 is a capillary tube as a pressure reducing device for the refrigerant flowing into the cooler 28 for the freezer compartment 7, and 33 is a capillary tube as a pressure reducing device for the refrigerant flowing into the cooler 29 for the refrigerator compartment 5. A refrigerant flow switching device 34 switches the refrigerant flow between the freezer compartment 7 cooler 28 side and the refrigerator compartment 5 cooler 29 side, and the illustrated one is the freezer compartment 7 side every time the electromagnetic solenoid 35 is energized. This is a so-called three-way electromagnetic valve in which the opening and closing of the valve 36 and the refrigerator compartment 5 side valve 37 are controlled. Instead of this three-way solenoid valve, an electromagnetic valve that opens and closes the refrigerant passage 38 to the cooler 28 for the freezer compartment 7 and an electromagnetic valve that opens and closes the refrigerant passage 39 to the cooler 29 for the refrigerator compartment 5 are provided. Control can be performed.
[0020]
Reference numeral 40 denotes a freezer compartment sensor provided for controlling the temperature of the freezer compartment 7. The freezer compartment sensor 40 may substantially sense the temperature of the freezer compartment 7 and is provided so as to sense the temperature of the freezer compartment 7 or the temperature of the cooler 28. ing. A refrigerating room sensor 41 is provided for temperature control of the refrigerating room 5 and substantially detects the temperature of the refrigerating room 5. Reference numeral 42 denotes a defrosting end sensor for detecting the defrosting end temperature of the cooler 28, and 43 is a defrosting end sensor for detecting the defrosting end temperature of the cooler 29. 44 is an electric heater for defrosting of the cooler 28, 45 is an electric heater for defrosting of the cooler 29. Reference numeral 46 denotes a microcomputer-type control device, which includes a compressor 25, blowers 30 and 31, and defrosting electric heaters 44 and 45 in response to signals from the freezer compartment sensor 40, the refrigerator compartment sensor 41, the defrosting end sensors 42 and 43, and the like. , And the operation of the cool air adjusting device 31, the refrigerant flow switching device 34, and the like.
[0021]
The present invention obtains a humidifying effect by the frost melting water of the cooler 29 in order to suppress the drying of the refrigerator compartment, and does not supply a large amount of moisture, and includes moisture rather than dry air. Since it circulates moisture, it can be said that it is a refrigerator that provides a moisturizing effect. One embodiment of the control will be described below.
[0022]
First, a normal cooling operation will be described. There are various methods for controlling the operation and stop of the compressor 25. As an embodiment of the present invention, a general method in which the operation and stop of the compressor 25 are controlled by the freezer compartment sensor 40 will be described. The freezer compartment 7 and the refrigerator compartment 5 are not cooled to a predetermined lower limit temperature, that is, the compressor 25 and the blowers 30 and 31 are operated to circulate cold air between the freezer compartment 7 and the refrigerator compartment 5. It is necessary to cool to a predetermined lower limit temperature. This is a so-called freezing / refrigeration operation mode. In this refrigeration operation mode, the compressor 25, the blower 30 and the blower 31 are operated (ON), the refrigerant passage 38 is closed by the electromagnetic valve 34, the refrigerant passage 39 is opened, and the refrigerant flows from the cooler 29 to the cooler 28. Return to the compressor 25. When the refrigerator compartment 5 is lowered to a predetermined lower limit temperature by this operation, the electromagnetic valve 34 is operated based on the temperature sensing of the refrigerator compartment sensor 41 to close the refrigerant passage 39, the supply of the refrigerant in the cooler 29 is stopped, and the refrigerant is Circulation from the refrigerant passage 38 to the cooler 28 returns to the compressor 25. When the freezer compartment 7 or the cooler 28 reaches a predetermined lower limit temperature, the electromagnetic valve 34 operates based on the temperature sensing of the freezer compartment sensor 40 to close the refrigerant passage 38 and stop (OFF) the compressor 25.
[0023]
The compressor 25 is operated (ON) again when the freezer sensor 40 senses a predetermined upper limit temperature. When the freezer sensor 40 senses a predetermined upper limit temperature, the compressor 25 is operated (ON), the electromagnetic valve 34 is operated to open the refrigerant passage 38 and flow the refrigerant to the cooler 28, and the blower 30 is operated (ON). And cooling of the freezer compartment 7 is promoted. When the refrigerating room sensor 41 senses a predetermined upper limit temperature, the solenoid valve 34 operates to open the refrigerant passage 39 to flow the refrigerant from the coolers 29 and 28, and the blower 31 operates again (ON). Cooling of the freezer compartment 7 and the refrigerator compartment 5 is promoted. In the control in such a freezing / refrigeration operation mode, the temperature range of the freezer compartment 7 is controlled to, for example, a range of −18 ° C. to −20 ° C., and the refrigerator compartment 5 has a lower limit such that the average temperature becomes 3 ° C., for example. The temperature is controlled to 1.8 ° C. to the upper limit temperature 4.2 ° C.
[0024]
Here, FIG. 5 will be described. When the freezer compartment 7 or the cooler 28 reaches a predetermined lower limit temperature, the electromagnetic valve 34 is operated based on the temperature sensing of the freezer compartment sensor 40 to close the refrigerant passage 38, and the compressor 25 and the blowers 30, 31 are stopped (OFF). ) State. In this state, when the freezer compartment sensor 40 and the refrigerator compartment sensor 41 sense a predetermined upper limit temperature, the compressor 25 is operated (ON), the electromagnetic valve 34 is operated to open the refrigerant passage 39 and cool from the cooler 29. The refrigerant flows into the chamber 28, and the fans 30 and 31 are again operated (ON) to cool the freezer compartment 7 and the refrigerator compartment 5. In this case, the cold air circulation blower 31 for the refrigerator compartment 5 is activated with a delay of T1 time from the start of the operation (ON) of the compressor 25. The mode in which the refrigerant flows to the cooler 29 and the cooler 28 to cool the freezer compartment 7 and the refrigerator compartment 5 is the refrigerator-freezer operation mode. At the start of this freezing / refrigeration operation mode, the temperature of the cooler 29 for the refrigerating chamber 5 is in a state of rising to about 0 ° C. Therefore, when the blower 31 is started simultaneously with the start of the operation (ON) of the compressor 25, the cooler The refrigerant having a high temperature in 29 flows into the cooler 28 for the freezer compartment 7 and the temperature of the cooler 28 below zero rises. As a result, the temperature of the freezer compartment 7 rises. Therefore, in the present invention, the blower 31 is started with a delay of T1 time from the start of operation (ON) of the compressor 25. This T1 time is a time during which the expected effect of substantially suppressing the temperature rise in the freezer compartment 7 can be expected. One example is effective in about 3 minutes. This time is set differently depending on the model of the refrigerator.
[0025]
The cold air circulation blower 30 for the freezer compartment 7 is also activated with delay. That is, since the temperature of the cooler 28 for the freezer compartment 7 also rises at the start of the freezing / refrigeration operation mode, the temperature of the freezer compartment 7 that activates the cold air circulation blower 30 for the freezer compartment 7 rises at this time. For this reason, when the compressor 25 is started (ON), the temperature of the cooler 28 is lowered, and the delay time T2 is set so that the cold air circulation blower 30 for the freezer compartment 7 is activated in a state where such an adverse effect can be suppressed. Yes. The delay time T2 is set differently depending on the refrigerator model.
[0026]
At time A when the refrigerator compartment sensor 41 detects a predetermined lower limit temperature by continuing the freezing and refrigeration operation mode, the electromagnetic valve 34 operates to close the refrigerant passage 39, the supply of the refrigerant to the cooler 29 is stopped, and the refrigerant passes through the refrigerant passage. The circulation flows from 38 to the cooler 28 and returns to the compressor 25. The humidifying operation (or moistening operation) mode is set by switching the refrigerant passage. In other words, the cold air circulation blower 31 for the refrigerator compartment is operated to circulate the air in the refrigerator compartment 5 to the refrigerator 29 for the refrigerator compartment, and the refrigerator compartment 5 is humidified by melting of the frost adhering to the refrigerator 29 for the refrigerator compartment. It becomes the humidification operation (or moist operation) mode to make (or moist state). In the humidifying operation (or humid operation) mode, in a state where the freezer compartment sensor 40 does not sense the predetermined lower limit temperature, the compressor 25 and the blower 30 are operated (ON), and cooling of the freezer compartment 7 is promoted. This humidifying operation (or moist operation) mode is to operate the blower 31 for a predetermined T7 time set in advance, and is set to about 3 to 20 minutes as one embodiment. This time is set differently depending on the refrigerator model.
[0027]
When the freezer compartment 7 or the cooler 28 reaches a predetermined lower limit temperature, the electromagnetic valve 34 operates based on the temperature sensing of the freezer compartment sensor 40 to close the refrigerant passage 38 and stop the compressor 25 (OFF). The blower 30 stops (OFF) after a delay of T3 from the stop (OFF) of the compressor 25. This T3 time is set to a time during which cooling of the cooler 28 is effectively continued by evaporation of the refrigerant accumulated in the cooler 28, and this time is set differently depending on the refrigerator model.
[0028]
In the above operating state, the mode in which the compressor 25 is operated (ON) and the refrigerant flows to the cooler 29 and the cooler 28 to cool the freezer compartment 7 and the refrigerator compartment 5 is the refrigerator-freezer operation mode. At time A when the refrigerator compartment sensor 41 detects a predetermined lower limit temperature, the solenoid valve 34 operates to close the refrigerant passage 39, supply of the refrigerant to the cooler 29 is stopped, and the refrigerant passes from the refrigerant passage 38 to the cooler 28. To flow. This is a cooling operation state of the freezer compartment 7 with the cooling operation of the refrigerator compartment 5 substantially stopped, and this is referred to as a freezing operation mode. The humidification operation (or moist operation) mode is performed during the period of the refrigeration operation mode.
[0029]
In the above operation state, the rotation speed of the blower 30 is set to be higher in the refrigeration operation mode period than in the refrigeration operation mode period. In addition, the rotational speed of the blower 30 is increased with a delay from the point of switching from the refrigeration operation mode to the refrigeration operation mode. It is preferable from the cooling effect that the rotation speed of the blower 30 is increased after the temperature of the freezer compartment cooler 28 is lowered after switching from the refrigeration operation mode to the refrigeration operation mode, and the rotation speed of the blower 30 is increased. This is to reduce the noise caused by this as much as possible. Although there is a method of rotating at a high speed after entering the humidifying operation (or humid operation) mode, in this embodiment, after the humidifying operation mode T7 ends than the period T4 until the end of the humidifying operation (or humid operation) mode T7. In this embodiment, the rotation speed (number of rotations) per minute is 1300 in the period T4 and 1500 per minute in the period T5. This is because the refrigerant evaporating temperature in the cooler 28 is high during the period T4 until the end of the humidifying operation (or moistening operation) mode T7, but after the humidifying operation mode T7, the refrigerant is flowing only to the cooler 28. This is because the cooling effect of the freezer compartment 7 by the cooler 28 is improved by the decrease of the evaporation temperature in the cooler 28. In addition, since the freezer compartment 7 can be cooled by evaporation of the refrigerant accumulated in the freezer cooler 28 after the compressor 25 is turned off, the freezer compartment cold air circulating blower 30 is turned off for a predetermined time T3 after the compressor 25 is turned off. Adopting technical means to continue operation. In this T3 time, in one preferred embodiment, the rotation of the blower 30 is 1300 per minute.
[0030]
The humidification operation (or moist operation) of the present invention will be additionally described. In the normal freezing / refrigeration operation mode, when the temperature of the refrigerator compartment 5 or the refrigerator for refrigerator compartment 29 is lowered by cooling and reaches a predetermined temperature (1.8 ° C. above), the refrigerant flow switching device 34 causes the refrigerator compartment to change. There is a method of closing the refrigerant flow path 39 to the cooler 29 for cooling, but before the refrigerating room 5 or the cooler 29 for refrigerating room reaches a predetermined temperature (1.8 ° C. above) by cooling, that is, this temperature. When the temperature drops to a slightly higher temperature (for example, 2.2 ° C.), a humidifying operation (or moistening operation) may be started. This method makes it possible to perform a humidifying operation (or a moist operation) for a time longer than the conventional 3 minutes (for example, 5 to 20 minutes). This time varies depending on the setting of the start temperature of the humidifying operation (or moistening operation). The refrigerating room sensor 41 senses the start temperature (2.2 ° C. in the above case) of the humidifying operation (or moistening operation), and the refrigerant flow switching device 34 operates to supply the refrigerant flow to the refrigerating room cooler 29. Although the passage 39 is closed, the temperature of the refrigerator 29 for the refrigerator compartment decreases due to thermal inertia. In this case, the temperature lowered by the thermal inertia is preferably lowered to the desired 1.8 ° C., and depending on the type of the refrigerator, humidification operation (or moist operation) so that such an operation can be achieved. It is better to set the starting temperature.
[0031]
According to the above configuration, the present invention can suppress adverse effects on the freezer cooler due to the high temperature of the freezer cooler at the start of the freezer refrigerating operation mode. Further, when the temperature of the refrigerating room decreases to a predetermined lower limit temperature, the refrigerant flow switching device stops the flow of the refrigerant to the refrigerating room cooler and flows only to the refrigerating room cooler. The present invention is effective when applied to a type in which a fan is operated to humidify the refrigerator compartment by melting frost of the refrigerator for the refrigerator compartment. Furthermore, the rotation speed of the freezer blower is changed so that the freezer cooler is effectively applied to the freezer.
[0032]
The present invention is not limited to the above-described embodiments, and various modifications can be considered without departing from the technical scope of the present invention, and the various embodiments related thereto are included.
[0033]
[0034]
[0035]
[0036]
[0037]
[0038]
【The invention's effect】
According to the first invention, it is possible to suppress an adverse effect on the refrigerator for freezer due to a high temperature of the refrigerator for the refrigerator compartment at the start of the refrigerator-freezer operation mode, and to prevent the frost in the refrigerator for the refrigerator compartment. It is effective when applied to a type that humidifies the refrigerator compartment by melting.
[0039]
[0040]
According to the second invention, after switching from the freezing / refrigeration operation mode to the freezing operation mode, the cooling capacity of the freezing chamber side cooler is increased in order to increase the rotation speed of the blower after the temperature of the freezing room side cooler decreases. The combined cooling effect is obtained, and the noise due to the increase in the rotational speed of the blower is reduced as much as possible.
[0041]
According to the third invention, the cooling effect suitable for the cooling capacity of the freezer compartment cooler, the noise suppression by the blower, and the effect of the humidifying operation (or humid operation) mode are taken into consideration.
[Brief description of the drawings]
FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a vertical side view of the refrigerator of FIG. 1 according to an embodiment of the present invention.
FIG. 3 is a refrigerant circuit diagram of the refrigerator of the refrigerator according to the embodiment of the present invention.
FIG. 4 is a control configuration diagram of the refrigerator according to the embodiment of the present invention.
FIG. 5 is a control time chart of the refrigerator according to the embodiment of the present invention.
[Explanation of symbols]
1 ... Refrigerator body 2 ... Inner box 3 ... Outer box 4 ... Insulation 5 ... Refrigerator room 6 ... Vegetable room 7 ... Freezer room 8 ... Division wall 9 ... Specific cold room 10 ... Upper freezer Chamber 11 ... Lower freezer compartment 12 ... Refrigerated compartment door 13 ... Vegetable container 14 ... Vegetable compartment door 15 ... Freezer compartment container 16 ... Freezer compartment container 17 ... Upper freezer compartment door 18 ... Lower freezer compartment door 25 ... Compressor 26 ... Condenser DESCRIPTION OF SYMBOLS 28 ... Refrigerating room cooler 29 ... Refrigerating room cooler 30 ... Refrigerating room cold air circulation blower 31 ... Refrigerating room cold air circulation blower 34 ... Refrigerant flow path switching device 38 ... Freezer room side refrigerant passage 39 ... Refrigerating room side refrigerant Passage 40 ... Freezer sensor 41 ... Refrigerator sensor 44 ... Defrosting electric heater 45 ... Defrosting electric heater 46 ... Control device

Claims (3)

A refrigerating room and a freezing room, each of which is provided with a dedicated refrigerating room cooler and a refrigerating room cold air circulation blower, a freezing room cooler and a freezing room cold air circulation blower, respectively. From the refrigerating / refrigeration operation mode in which the refrigerant compressed by the compressor and passed through the condenser flows from the refrigerating room cooler to the refrigerating room cooler to cool the refrigerating room and the freezing room, the refrigerating room or the refrigerating room When the cooler is lowered to a predetermined temperature by cooling, the refrigerant flow switching device closes the refrigerant flow path to the refrigerator for the refrigerator compartment and switches to the refrigerating operation mode for flowing the refrigerant to the freezer cooler, In the refrigerator that stops the compressor when the temperature control sensor of the freezer detects a predetermined lower limit temperature,
Valid predetermined time to suppress the adverse effect on the freezing compartment cooler by the chillers condenser temperature at the start of refrigeration refrigeration operation mode is high, the refrigerating compartment cold air circulating blower start of operation of said compressor Is started with a delay, and when the switching control is performed by the refrigerant flow switching device, the refrigeration compartment cooler is operated for a predetermined time to melt the frost adhering to the refrigeration compartment cooler. The operation of the refrigerator is characterized in that the humidifying operation mode is set to a humidified state, and the period after the end of the humidifying operation mode is set to be higher than the period until the end of the humidifying operation mode. Control device. A refrigerating room and a freezing room, each of which is provided with a dedicated refrigerating room cooler and a refrigerating room cold air circulation blower, a freezing room cooler and a freezing room cold air circulation blower, respectively. From the refrigerating / refrigeration operation mode in which the refrigerant compressed by the compressor and passed through the condenser flows from the refrigerating room cooler to the refrigerating room cooler to cool the refrigerating room and the freezing room, the refrigerating room or the refrigerating room When the cooler drops to a predetermined temperature due to cooling, the refrigerant flow switching device closes the refrigerant flow path to the refrigerator for the refrigerating chamber and switches to the refrigerating operation mode in which the refrigerant flows to the freezer cooler, In the refrigerator that stops the compressor when the temperature control sensor of the freezer detects a predetermined lower limit temperature,
An operation control apparatus for a refrigerator, characterized in that the number of rotations of the cold-air circulation blower for the freezer compartment is increased with a delay from the switching time from the freezing / refrigeration operation mode to the freezing operation mode. When switching from the refrigeration operation mode to the refrigeration operation mode is controlled, the refrigeration chamber is operated in a humidified state by melting the frost adhering to the refrigeration chamber cooler by operating the cold air circulation blower for the refrigeration chamber for a predetermined time. performs the delay during the humidification operation mode, the refrigerator operating control apparatus according to claim 2, wherein the increasing the rotation speed of the freezing compartment cold air circulating blower during the humidifying operation mode end.

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